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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Edgeport USB Serial Converter driver
4 *
5 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
6 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
7 *
8 * Supports the following devices:
9 * Edgeport/4
10 * Edgeport/4t
11 * Edgeport/2
12 * Edgeport/4i
13 * Edgeport/2i
14 * Edgeport/421
15 * Edgeport/21
16 * Rapidport/4
17 * Edgeport/8
18 * Edgeport/2D8
19 * Edgeport/4D8
20 * Edgeport/8i
21 *
22 * For questions or problems with this driver, contact Inside Out
23 * Networks technical support, or Peter Berger <pberger@brimson.com>,
24 * or Al Borchers <alborchers@steinerpoint.com>.
25 *
26 */
27
28#include <linux/kernel.h>
29#include <linux/jiffies.h>
30#include <linux/errno.h>
31#include <linux/slab.h>
32#include <linux/tty.h>
33#include <linux/tty_driver.h>
34#include <linux/tty_flip.h>
35#include <linux/module.h>
36#include <linux/spinlock.h>
37#include <linux/serial.h>
38#include <linux/ioctl.h>
39#include <linux/wait.h>
40#include <linux/firmware.h>
41#include <linux/ihex.h>
42#include <linux/uaccess.h>
43#include <linux/usb.h>
44#include <linux/usb/serial.h>
45#include "io_edgeport.h"
46#include "io_ionsp.h" /* info for the iosp messages */
47#include "io_16654.h" /* 16654 UART defines */
48
49#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
50#define DRIVER_DESC "Edgeport USB Serial Driver"
51
52#define MAX_NAME_LEN 64
53
54#define OPEN_TIMEOUT (5*HZ) /* 5 seconds */
55
56static const struct usb_device_id edgeport_2port_id_table[] = {
57 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) },
58 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) },
59 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) },
60 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) },
61 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) },
62 { }
63};
64
65static const struct usb_device_id edgeport_4port_id_table[] = {
66 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) },
67 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) },
68 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) },
69 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
70 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) },
71 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
72 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) },
73 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
74 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
75 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
76 { }
77};
78
79static const struct usb_device_id edgeport_8port_id_table[] = {
80 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) },
81 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
82 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) },
83 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
84 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
85 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
86 { }
87};
88
89static const struct usb_device_id Epic_port_id_table[] = {
90 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
91 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
92 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
93 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
94 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
95 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
96 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
97 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
98 { }
99};
100
101/* Devices that this driver supports */
102static const struct usb_device_id id_table_combined[] = {
103 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) },
104 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) },
105 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) },
106 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
107 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) },
108 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) },
109 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) },
110 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) },
111 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) },
112 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
113 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) },
114 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) },
115 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) },
116 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
117 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
118 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
119 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
120 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) },
121 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
122 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
123 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
124 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
125 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
126 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
127 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
128 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
129 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
130 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
131 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
132 { } /* Terminating entry */
133};
134
135MODULE_DEVICE_TABLE(usb, id_table_combined);
136
137
138/* receive port state */
139enum RXSTATE {
140 EXPECT_HDR1 = 0, /* Expect header byte 1 */
141 EXPECT_HDR2 = 1, /* Expect header byte 2 */
142 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */
143 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */
144};
145
146
147/* Transmit Fifo
148 * This Transmit queue is an extension of the edgeport Rx buffer.
149 * The maximum amount of data buffered in both the edgeport
150 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
151 */
152struct TxFifo {
153 unsigned int head; /* index to head pointer (write) */
154 unsigned int tail; /* index to tail pointer (read) */
155 unsigned int count; /* Bytes in queue */
156 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */
157 unsigned char *fifo; /* allocated Buffer */
158};
159
160/* This structure holds all of the local port information */
161struct edgeport_port {
162 __u16 txCredits; /* our current credits for this port */
163 __u16 maxTxCredits; /* the max size of the port */
164
165 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */
166 struct urb *write_urb; /* write URB for this port */
167 bool write_in_progress; /* 'true' while a write URB is outstanding */
168 spinlock_t ep_lock;
169
170 __u8 shadowLCR; /* last LCR value received */
171 __u8 shadowMCR; /* last MCR value received */
172 __u8 shadowMSR; /* last MSR value received */
173 __u8 shadowLSR; /* last LSR value received */
174 __u8 shadowXonChar; /* last value set as XON char in Edgeport */
175 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */
176 __u8 validDataMask;
177 __u32 baudRate;
178
179 bool open;
180 bool openPending;
181 bool commandPending;
182 bool closePending;
183 bool chaseResponsePending;
184
185 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
186 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */
187 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */
188
189 struct usb_serial_port *port; /* loop back to the owner of this object */
190};
191
192
193/* This structure holds all of the individual device information */
194struct edgeport_serial {
195 char name[MAX_NAME_LEN+2]; /* string name of this device */
196
197 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */
198 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */
199 struct edgeport_product_info product_info; /* Product Info */
200 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */
201 int is_epic; /* flag if EPiC device or not */
202
203 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */
204 unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */
205 struct urb *interrupt_read_urb; /* our interrupt urb */
206
207 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */
208 unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */
209 struct urb *read_urb; /* our bulk read urb */
210 bool read_in_progress;
211 spinlock_t es_lock;
212
213 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */
214
215 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */
216
217 enum RXSTATE rxState; /* the current state of the bulk receive processor */
218 __u8 rxHeader1; /* receive header byte 1 */
219 __u8 rxHeader2; /* receive header byte 2 */
220 __u8 rxHeader3; /* receive header byte 3 */
221 __u8 rxPort; /* the port that we are currently receiving data for */
222 __u8 rxStatusCode; /* the receive status code */
223 __u8 rxStatusParam; /* the receive status parameter */
224 __s16 rxBytesRemaining; /* the number of port bytes left to read */
225 struct usb_serial *serial; /* loop back to the owner of this object */
226};
227
228/* baud rate information */
229struct divisor_table_entry {
230 __u32 BaudRate;
231 __u16 Divisor;
232};
233
234/*
235 * Define table of divisors for Rev A EdgePort/4 hardware
236 * These assume a 3.6864MHz crystal, the standard /16, and
237 * MCR.7 = 0.
238 */
239
240static const struct divisor_table_entry divisor_table[] = {
241 { 50, 4608},
242 { 75, 3072},
243 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */
244 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */
245 { 150, 1536},
246 { 300, 768},
247 { 600, 384},
248 { 1200, 192},
249 { 1800, 128},
250 { 2400, 96},
251 { 4800, 48},
252 { 7200, 32},
253 { 9600, 24},
254 { 14400, 16},
255 { 19200, 12},
256 { 38400, 6},
257 { 57600, 4},
258 { 115200, 2},
259 { 230400, 1},
260};
261
262/* Number of outstanding Command Write Urbs */
263static atomic_t CmdUrbs = ATOMIC_INIT(0);
264
265
266/* function prototypes */
267
268static void edge_close(struct usb_serial_port *port);
269
270static void process_rcvd_data(struct edgeport_serial *edge_serial,
271 unsigned char *buffer, __u16 bufferLength);
272static void process_rcvd_status(struct edgeport_serial *edge_serial,
273 __u8 byte2, __u8 byte3);
274static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
275 int length);
276static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
277static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
278 __u8 lsr, __u8 data);
279static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
280 __u8 param);
281static int calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
282static void change_port_settings(struct tty_struct *tty,
283 struct edgeport_port *edge_port,
284 const struct ktermios *old_termios);
285static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
286 __u8 regNum, __u8 regValue);
287static int write_cmd_usb(struct edgeport_port *edge_port,
288 unsigned char *buffer, int writeLength);
289static void send_more_port_data(struct edgeport_serial *edge_serial,
290 struct edgeport_port *edge_port);
291
292static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
293 __u16 length, const __u8 *data);
294
295/* ************************************************************************ */
296/* ************************************************************************ */
297/* ************************************************************************ */
298/* ************************************************************************ */
299
300/************************************************************************
301 * *
302 * update_edgeport_E2PROM() Compare current versions of *
303 * Boot ROM and Manufacture *
304 * Descriptors with versions *
305 * embedded in this driver *
306 * *
307 ************************************************************************/
308static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
309{
310 struct device *dev = &edge_serial->serial->dev->dev;
311 __u32 BootCurVer;
312 __u32 BootNewVer;
313 __u8 BootMajorVersion;
314 __u8 BootMinorVersion;
315 __u16 BootBuildNumber;
316 __u32 Bootaddr;
317 const struct ihex_binrec *rec;
318 const struct firmware *fw;
319 const char *fw_name;
320 int response;
321
322 switch (edge_serial->product_info.iDownloadFile) {
323 case EDGE_DOWNLOAD_FILE_I930:
324 fw_name = "edgeport/boot.fw";
325 break;
326 case EDGE_DOWNLOAD_FILE_80251:
327 fw_name = "edgeport/boot2.fw";
328 break;
329 default:
330 return;
331 }
332
333 response = request_ihex_firmware(&fw, fw_name,
334 &edge_serial->serial->dev->dev);
335 if (response) {
336 dev_err(dev, "Failed to load image \"%s\" err %d\n",
337 fw_name, response);
338 return;
339 }
340
341 rec = (const struct ihex_binrec *)fw->data;
342 BootMajorVersion = rec->data[0];
343 BootMinorVersion = rec->data[1];
344 BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
345
346 /* Check Boot Image Version */
347 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
348 (edge_serial->boot_descriptor.MinorVersion << 16) +
349 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
350
351 BootNewVer = (BootMajorVersion << 24) +
352 (BootMinorVersion << 16) +
353 BootBuildNumber;
354
355 dev_dbg(dev, "Current Boot Image version %d.%d.%d\n",
356 edge_serial->boot_descriptor.MajorVersion,
357 edge_serial->boot_descriptor.MinorVersion,
358 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
359
360
361 if (BootNewVer > BootCurVer) {
362 dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n",
363 edge_serial->boot_descriptor.MajorVersion,
364 edge_serial->boot_descriptor.MinorVersion,
365 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
366 BootMajorVersion, BootMinorVersion, BootBuildNumber);
367
368 dev_dbg(dev, "Downloading new Boot Image\n");
369
370 for (rec = ihex_next_binrec(rec); rec;
371 rec = ihex_next_binrec(rec)) {
372 Bootaddr = be32_to_cpu(rec->addr);
373 response = rom_write(edge_serial->serial,
374 Bootaddr >> 16,
375 Bootaddr & 0xFFFF,
376 be16_to_cpu(rec->len),
377 &rec->data[0]);
378 if (response < 0) {
379 dev_err(&edge_serial->serial->dev->dev,
380 "rom_write failed (%x, %x, %d)\n",
381 Bootaddr >> 16, Bootaddr & 0xFFFF,
382 be16_to_cpu(rec->len));
383 break;
384 }
385 }
386 } else {
387 dev_dbg(dev, "Boot Image -- already up to date\n");
388 }
389 release_firmware(fw);
390}
391
392static void dump_product_info(struct edgeport_serial *edge_serial,
393 struct edgeport_product_info *product_info)
394{
395 struct device *dev = &edge_serial->serial->dev->dev;
396
397 /* Dump Product Info structure */
398 dev_dbg(dev, "**Product Information:\n");
399 dev_dbg(dev, " ProductId %x\n", product_info->ProductId);
400 dev_dbg(dev, " NumPorts %d\n", product_info->NumPorts);
401 dev_dbg(dev, " ProdInfoVer %d\n", product_info->ProdInfoVer);
402 dev_dbg(dev, " IsServer %d\n", product_info->IsServer);
403 dev_dbg(dev, " IsRS232 %d\n", product_info->IsRS232);
404 dev_dbg(dev, " IsRS422 %d\n", product_info->IsRS422);
405 dev_dbg(dev, " IsRS485 %d\n", product_info->IsRS485);
406 dev_dbg(dev, " RomSize %d\n", product_info->RomSize);
407 dev_dbg(dev, " RamSize %d\n", product_info->RamSize);
408 dev_dbg(dev, " CpuRev %x\n", product_info->CpuRev);
409 dev_dbg(dev, " BoardRev %x\n", product_info->BoardRev);
410 dev_dbg(dev, " BootMajorVersion %d.%d.%d\n",
411 product_info->BootMajorVersion,
412 product_info->BootMinorVersion,
413 le16_to_cpu(product_info->BootBuildNumber));
414 dev_dbg(dev, " FirmwareMajorVersion %d.%d.%d\n",
415 product_info->FirmwareMajorVersion,
416 product_info->FirmwareMinorVersion,
417 le16_to_cpu(product_info->FirmwareBuildNumber));
418 dev_dbg(dev, " ManufactureDescDate %d/%d/%d\n",
419 product_info->ManufactureDescDate[0],
420 product_info->ManufactureDescDate[1],
421 product_info->ManufactureDescDate[2]+1900);
422 dev_dbg(dev, " iDownloadFile 0x%x\n",
423 product_info->iDownloadFile);
424 dev_dbg(dev, " EpicVer %d\n", product_info->EpicVer);
425}
426
427static void get_product_info(struct edgeport_serial *edge_serial)
428{
429 struct edgeport_product_info *product_info = &edge_serial->product_info;
430
431 memset(product_info, 0, sizeof(struct edgeport_product_info));
432
433 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
434 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
435 product_info->ProdInfoVer = 0;
436
437 product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
438 product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
439 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
440 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
441
442 product_info->BootMajorVersion =
443 edge_serial->boot_descriptor.MajorVersion;
444 product_info->BootMinorVersion =
445 edge_serial->boot_descriptor.MinorVersion;
446 product_info->BootBuildNumber =
447 edge_serial->boot_descriptor.BuildNumber;
448
449 memcpy(product_info->ManufactureDescDate,
450 edge_serial->manuf_descriptor.DescDate,
451 sizeof(edge_serial->manuf_descriptor.DescDate));
452
453 /* check if this is 2nd generation hardware */
454 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
455 & ION_DEVICE_ID_80251_NETCHIP)
456 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
457 else
458 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
459
460 /* Determine Product type and set appropriate flags */
461 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
462 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
463 case ION_DEVICE_ID_EDGEPORT_4T:
464 case ION_DEVICE_ID_EDGEPORT_4:
465 case ION_DEVICE_ID_EDGEPORT_2:
466 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
467 case ION_DEVICE_ID_EDGEPORT_8:
468 case ION_DEVICE_ID_EDGEPORT_421:
469 case ION_DEVICE_ID_EDGEPORT_21:
470 case ION_DEVICE_ID_EDGEPORT_2_DIN:
471 case ION_DEVICE_ID_EDGEPORT_4_DIN:
472 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
473 product_info->IsRS232 = 1;
474 break;
475
476 case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
477 product_info->IsRS422 = 1;
478 product_info->IsRS485 = 1;
479 break;
480
481 case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
482 case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
483 product_info->IsRS422 = 1;
484 break;
485 }
486
487 dump_product_info(edge_serial, product_info);
488}
489
490static int get_epic_descriptor(struct edgeport_serial *ep)
491{
492 int result;
493 struct usb_serial *serial = ep->serial;
494 struct edgeport_product_info *product_info = &ep->product_info;
495 struct edge_compatibility_descriptor *epic;
496 struct edge_compatibility_bits *bits;
497 struct device *dev = &serial->dev->dev;
498
499 ep->is_epic = 0;
500
501 epic = kmalloc(sizeof(*epic), GFP_KERNEL);
502 if (!epic)
503 return -ENOMEM;
504
505 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
506 USB_REQUEST_ION_GET_EPIC_DESC,
507 0xC0, 0x00, 0x00,
508 epic, sizeof(*epic),
509 300);
510 if (result == sizeof(*epic)) {
511 ep->is_epic = 1;
512 memcpy(&ep->epic_descriptor, epic, sizeof(*epic));
513 memset(product_info, 0, sizeof(struct edgeport_product_info));
514
515 product_info->NumPorts = epic->NumPorts;
516 product_info->ProdInfoVer = 0;
517 product_info->FirmwareMajorVersion = epic->MajorVersion;
518 product_info->FirmwareMinorVersion = epic->MinorVersion;
519 product_info->FirmwareBuildNumber = epic->BuildNumber;
520 product_info->iDownloadFile = epic->iDownloadFile;
521 product_info->EpicVer = epic->EpicVer;
522 product_info->Epic = epic->Supports;
523 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
524 dump_product_info(ep, product_info);
525
526 bits = &ep->epic_descriptor.Supports;
527 dev_dbg(dev, "**EPIC descriptor:\n");
528 dev_dbg(dev, " VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE");
529 dev_dbg(dev, " IOSPOpen : %s\n", bits->IOSPOpen ? "TRUE": "FALSE");
530 dev_dbg(dev, " IOSPClose : %s\n", bits->IOSPClose ? "TRUE": "FALSE");
531 dev_dbg(dev, " IOSPChase : %s\n", bits->IOSPChase ? "TRUE": "FALSE");
532 dev_dbg(dev, " IOSPSetRxFlow : %s\n", bits->IOSPSetRxFlow ? "TRUE": "FALSE");
533 dev_dbg(dev, " IOSPSetTxFlow : %s\n", bits->IOSPSetTxFlow ? "TRUE": "FALSE");
534 dev_dbg(dev, " IOSPSetXChar : %s\n", bits->IOSPSetXChar ? "TRUE": "FALSE");
535 dev_dbg(dev, " IOSPRxCheck : %s\n", bits->IOSPRxCheck ? "TRUE": "FALSE");
536 dev_dbg(dev, " IOSPSetClrBreak : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
537 dev_dbg(dev, " IOSPWriteMCR : %s\n", bits->IOSPWriteMCR ? "TRUE": "FALSE");
538 dev_dbg(dev, " IOSPWriteLCR : %s\n", bits->IOSPWriteLCR ? "TRUE": "FALSE");
539 dev_dbg(dev, " IOSPSetBaudRate : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
540 dev_dbg(dev, " TrueEdgeport : %s\n", bits->TrueEdgeport ? "TRUE": "FALSE");
541
542 result = 0;
543 } else if (result >= 0) {
544 dev_warn(&serial->interface->dev, "short epic descriptor received: %d\n",
545 result);
546 result = -EIO;
547 }
548
549 kfree(epic);
550
551 return result;
552}
553
554
555/************************************************************************/
556/************************************************************************/
557/* U S B C A L L B A C K F U N C T I O N S */
558/* U S B C A L L B A C K F U N C T I O N S */
559/************************************************************************/
560/************************************************************************/
561
562/*****************************************************************************
563 * edge_interrupt_callback
564 * this is the callback function for when we have received data on the
565 * interrupt endpoint.
566 *****************************************************************************/
567static void edge_interrupt_callback(struct urb *urb)
568{
569 struct edgeport_serial *edge_serial = urb->context;
570 struct device *dev;
571 struct edgeport_port *edge_port;
572 struct usb_serial_port *port;
573 unsigned char *data = urb->transfer_buffer;
574 int length = urb->actual_length;
575 unsigned long flags;
576 int bytes_avail;
577 int position;
578 int txCredits;
579 int portNumber;
580 int result;
581 int status = urb->status;
582
583 switch (status) {
584 case 0:
585 /* success */
586 break;
587 case -ECONNRESET:
588 case -ENOENT:
589 case -ESHUTDOWN:
590 /* this urb is terminated, clean up */
591 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
592 return;
593 default:
594 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
595 goto exit;
596 }
597
598 dev = &edge_serial->serial->dev->dev;
599
600 /* process this interrupt-read even if there are no ports open */
601 if (length) {
602 usb_serial_debug_data(dev, __func__, length, data);
603
604 if (length > 1) {
605 bytes_avail = data[0] | (data[1] << 8);
606 if (bytes_avail) {
607 spin_lock_irqsave(&edge_serial->es_lock, flags);
608 edge_serial->rxBytesAvail += bytes_avail;
609 dev_dbg(dev,
610 "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
611 __func__, bytes_avail,
612 edge_serial->rxBytesAvail,
613 edge_serial->read_in_progress);
614
615 if (edge_serial->rxBytesAvail > 0 &&
616 !edge_serial->read_in_progress) {
617 dev_dbg(dev, "%s - posting a read\n", __func__);
618 edge_serial->read_in_progress = true;
619
620 /* we have pending bytes on the
621 bulk in pipe, send a request */
622 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
623 if (result) {
624 dev_err(dev,
625 "%s - usb_submit_urb(read bulk) failed with result = %d\n",
626 __func__, result);
627 edge_serial->read_in_progress = false;
628 }
629 }
630 spin_unlock_irqrestore(&edge_serial->es_lock,
631 flags);
632 }
633 }
634 /* grab the txcredits for the ports if available */
635 position = 2;
636 portNumber = 0;
637 while ((position < length - 1) &&
638 (portNumber < edge_serial->serial->num_ports)) {
639 txCredits = data[position] | (data[position+1] << 8);
640 if (txCredits) {
641 port = edge_serial->serial->port[portNumber];
642 edge_port = usb_get_serial_port_data(port);
643 if (edge_port && edge_port->open) {
644 spin_lock_irqsave(&edge_port->ep_lock,
645 flags);
646 edge_port->txCredits += txCredits;
647 spin_unlock_irqrestore(&edge_port->ep_lock,
648 flags);
649 dev_dbg(dev, "%s - txcredits for port%d = %d\n",
650 __func__, portNumber,
651 edge_port->txCredits);
652
653 /* tell the tty driver that something
654 has changed */
655 tty_port_tty_wakeup(&edge_port->port->port);
656 /* Since we have more credit, check
657 if more data can be sent */
658 send_more_port_data(edge_serial,
659 edge_port);
660 }
661 }
662 position += 2;
663 ++portNumber;
664 }
665 }
666
667exit:
668 result = usb_submit_urb(urb, GFP_ATOMIC);
669 if (result)
670 dev_err(&urb->dev->dev,
671 "%s - Error %d submitting control urb\n",
672 __func__, result);
673}
674
675
676/*****************************************************************************
677 * edge_bulk_in_callback
678 * this is the callback function for when we have received data on the
679 * bulk in endpoint.
680 *****************************************************************************/
681static void edge_bulk_in_callback(struct urb *urb)
682{
683 struct edgeport_serial *edge_serial = urb->context;
684 struct device *dev;
685 unsigned char *data = urb->transfer_buffer;
686 int retval;
687 __u16 raw_data_length;
688 int status = urb->status;
689 unsigned long flags;
690
691 if (status) {
692 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
693 __func__, status);
694 edge_serial->read_in_progress = false;
695 return;
696 }
697
698 if (urb->actual_length == 0) {
699 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
700 edge_serial->read_in_progress = false;
701 return;
702 }
703
704 dev = &edge_serial->serial->dev->dev;
705 raw_data_length = urb->actual_length;
706
707 usb_serial_debug_data(dev, __func__, raw_data_length, data);
708
709 spin_lock_irqsave(&edge_serial->es_lock, flags);
710
711 /* decrement our rxBytes available by the number that we just got */
712 edge_serial->rxBytesAvail -= raw_data_length;
713
714 dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
715 raw_data_length, edge_serial->rxBytesAvail);
716
717 process_rcvd_data(edge_serial, data, urb->actual_length);
718
719 /* check to see if there's any more data for us to read */
720 if (edge_serial->rxBytesAvail > 0) {
721 dev_dbg(dev, "%s - posting a read\n", __func__);
722 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
723 if (retval) {
724 dev_err(dev,
725 "%s - usb_submit_urb(read bulk) failed, retval = %d\n",
726 __func__, retval);
727 edge_serial->read_in_progress = false;
728 }
729 } else {
730 edge_serial->read_in_progress = false;
731 }
732
733 spin_unlock_irqrestore(&edge_serial->es_lock, flags);
734}
735
736
737/*****************************************************************************
738 * edge_bulk_out_data_callback
739 * this is the callback function for when we have finished sending
740 * serial data on the bulk out endpoint.
741 *****************************************************************************/
742static void edge_bulk_out_data_callback(struct urb *urb)
743{
744 struct edgeport_port *edge_port = urb->context;
745 int status = urb->status;
746
747 if (status) {
748 dev_dbg(&urb->dev->dev,
749 "%s - nonzero write bulk status received: %d\n",
750 __func__, status);
751 }
752
753 if (edge_port->open)
754 tty_port_tty_wakeup(&edge_port->port->port);
755
756 /* Release the Write URB */
757 edge_port->write_in_progress = false;
758
759 /* Check if more data needs to be sent */
760 send_more_port_data((struct edgeport_serial *)
761 (usb_get_serial_data(edge_port->port->serial)), edge_port);
762}
763
764
765/*****************************************************************************
766 * BulkOutCmdCallback
767 * this is the callback function for when we have finished sending a
768 * command on the bulk out endpoint.
769 *****************************************************************************/
770static void edge_bulk_out_cmd_callback(struct urb *urb)
771{
772 struct edgeport_port *edge_port = urb->context;
773 int status = urb->status;
774
775 atomic_dec(&CmdUrbs);
776 dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
777 __func__, urb, atomic_read(&CmdUrbs));
778
779
780 /* clean up the transfer buffer */
781 kfree(urb->transfer_buffer);
782
783 /* Free the command urb */
784 usb_free_urb(urb);
785
786 if (status) {
787 dev_dbg(&urb->dev->dev,
788 "%s - nonzero write bulk status received: %d\n",
789 __func__, status);
790 return;
791 }
792
793 /* tell the tty driver that something has changed */
794 if (edge_port->open)
795 tty_port_tty_wakeup(&edge_port->port->port);
796
797 /* we have completed the command */
798 edge_port->commandPending = false;
799 wake_up(&edge_port->wait_command);
800}
801
802
803/*****************************************************************************
804 * Driver tty interface functions
805 *****************************************************************************/
806
807/*****************************************************************************
808 * SerialOpen
809 * this function is called by the tty driver when a port is opened
810 * If successful, we return 0
811 * Otherwise we return a negative error number.
812 *****************************************************************************/
813static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
814{
815 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
816 struct device *dev = &port->dev;
817 struct usb_serial *serial;
818 struct edgeport_serial *edge_serial;
819 int response;
820
821 if (edge_port == NULL)
822 return -ENODEV;
823
824 /* see if we've set up our endpoint info yet (can't set it up
825 in edge_startup as the structures were not set up at that time.) */
826 serial = port->serial;
827 edge_serial = usb_get_serial_data(serial);
828 if (edge_serial == NULL)
829 return -ENODEV;
830 if (edge_serial->interrupt_in_buffer == NULL) {
831 struct usb_serial_port *port0 = serial->port[0];
832
833 /* not set up yet, so do it now */
834 edge_serial->interrupt_in_buffer =
835 port0->interrupt_in_buffer;
836 edge_serial->interrupt_in_endpoint =
837 port0->interrupt_in_endpointAddress;
838 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
839 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
840 edge_serial->bulk_in_endpoint =
841 port0->bulk_in_endpointAddress;
842 edge_serial->read_urb = port0->read_urb;
843 edge_serial->bulk_out_endpoint =
844 port0->bulk_out_endpointAddress;
845
846 /* set up our interrupt urb */
847 usb_fill_int_urb(edge_serial->interrupt_read_urb,
848 serial->dev,
849 usb_rcvintpipe(serial->dev,
850 port0->interrupt_in_endpointAddress),
851 port0->interrupt_in_buffer,
852 edge_serial->interrupt_read_urb->transfer_buffer_length,
853 edge_interrupt_callback, edge_serial,
854 edge_serial->interrupt_read_urb->interval);
855
856 /* set up our bulk in urb */
857 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
858 usb_rcvbulkpipe(serial->dev,
859 port0->bulk_in_endpointAddress),
860 port0->bulk_in_buffer,
861 edge_serial->read_urb->transfer_buffer_length,
862 edge_bulk_in_callback, edge_serial);
863 edge_serial->read_in_progress = false;
864
865 /* start interrupt read for this edgeport
866 * this interrupt will continue as long
867 * as the edgeport is connected */
868 response = usb_submit_urb(edge_serial->interrupt_read_urb,
869 GFP_KERNEL);
870 if (response) {
871 dev_err(dev, "%s - Error %d submitting control urb\n",
872 __func__, response);
873 }
874 }
875
876 /* initialize our wait queues */
877 init_waitqueue_head(&edge_port->wait_open);
878 init_waitqueue_head(&edge_port->wait_chase);
879 init_waitqueue_head(&edge_port->wait_command);
880
881 /* initialize our port settings */
882 edge_port->txCredits = 0; /* Can't send any data yet */
883 /* Must always set this bit to enable ints! */
884 edge_port->shadowMCR = MCR_MASTER_IE;
885 edge_port->chaseResponsePending = false;
886
887 /* send a open port command */
888 edge_port->openPending = true;
889 edge_port->open = false;
890 response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
891
892 if (response < 0) {
893 dev_err(dev, "%s - error sending open port command\n", __func__);
894 edge_port->openPending = false;
895 return -ENODEV;
896 }
897
898 /* now wait for the port to be completely opened */
899 wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
900 OPEN_TIMEOUT);
901
902 if (!edge_port->open) {
903 /* open timed out */
904 dev_dbg(dev, "%s - open timeout\n", __func__);
905 edge_port->openPending = false;
906 return -ENODEV;
907 }
908
909 /* create the txfifo */
910 edge_port->txfifo.head = 0;
911 edge_port->txfifo.tail = 0;
912 edge_port->txfifo.count = 0;
913 edge_port->txfifo.size = edge_port->maxTxCredits;
914 edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
915
916 if (!edge_port->txfifo.fifo) {
917 edge_close(port);
918 return -ENOMEM;
919 }
920
921 /* Allocate a URB for the write */
922 edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
923 edge_port->write_in_progress = false;
924
925 if (!edge_port->write_urb) {
926 edge_close(port);
927 return -ENOMEM;
928 }
929
930 dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n",
931 __func__, edge_port->maxTxCredits);
932
933 return 0;
934}
935
936
937/************************************************************************
938 *
939 * block_until_chase_response
940 *
941 * This function will block the close until one of the following:
942 * 1. Response to our Chase comes from Edgeport
943 * 2. A timeout of 10 seconds without activity has expired
944 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
945 *
946 ************************************************************************/
947static void block_until_chase_response(struct edgeport_port *edge_port)
948{
949 struct device *dev = &edge_port->port->dev;
950 DEFINE_WAIT(wait);
951 __u16 lastCredits;
952 int timeout = 1*HZ;
953 int loop = 10;
954
955 while (1) {
956 /* Save Last credits */
957 lastCredits = edge_port->txCredits;
958
959 /* Did we get our Chase response */
960 if (!edge_port->chaseResponsePending) {
961 dev_dbg(dev, "%s - Got Chase Response\n", __func__);
962
963 /* did we get all of our credit back? */
964 if (edge_port->txCredits == edge_port->maxTxCredits) {
965 dev_dbg(dev, "%s - Got all credits\n", __func__);
966 return;
967 }
968 }
969
970 /* Block the thread for a while */
971 prepare_to_wait(&edge_port->wait_chase, &wait,
972 TASK_UNINTERRUPTIBLE);
973 schedule_timeout(timeout);
974 finish_wait(&edge_port->wait_chase, &wait);
975
976 if (lastCredits == edge_port->txCredits) {
977 /* No activity.. count down. */
978 loop--;
979 if (loop == 0) {
980 edge_port->chaseResponsePending = false;
981 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
982 return;
983 }
984 } else {
985 /* Reset timeout value back to 10 seconds */
986 dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
987 lastCredits, edge_port->txCredits);
988 loop = 10;
989 }
990 }
991}
992
993
994/************************************************************************
995 *
996 * block_until_tx_empty
997 *
998 * This function will block the close until one of the following:
999 * 1. TX count are 0
1000 * 2. The edgeport has stopped
1001 * 3. A timeout of 3 seconds without activity has expired
1002 *
1003 ************************************************************************/
1004static void block_until_tx_empty(struct edgeport_port *edge_port)
1005{
1006 struct device *dev = &edge_port->port->dev;
1007 DEFINE_WAIT(wait);
1008 struct TxFifo *fifo = &edge_port->txfifo;
1009 __u32 lastCount;
1010 int timeout = HZ/10;
1011 int loop = 30;
1012
1013 while (1) {
1014 /* Save Last count */
1015 lastCount = fifo->count;
1016
1017 /* Is the Edgeport Buffer empty? */
1018 if (lastCount == 0) {
1019 dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
1020 return;
1021 }
1022
1023 /* Block the thread for a while */
1024 prepare_to_wait(&edge_port->wait_chase, &wait,
1025 TASK_UNINTERRUPTIBLE);
1026 schedule_timeout(timeout);
1027 finish_wait(&edge_port->wait_chase, &wait);
1028
1029 dev_dbg(dev, "%s wait\n", __func__);
1030
1031 if (lastCount == fifo->count) {
1032 /* No activity.. count down. */
1033 loop--;
1034 if (loop == 0) {
1035 dev_dbg(dev, "%s - TIMEOUT\n", __func__);
1036 return;
1037 }
1038 } else {
1039 /* Reset timeout value back to seconds */
1040 loop = 30;
1041 }
1042 }
1043}
1044
1045
1046/*****************************************************************************
1047 * edge_close
1048 * this function is called by the tty driver when a port is closed
1049 *****************************************************************************/
1050static void edge_close(struct usb_serial_port *port)
1051{
1052 struct edgeport_serial *edge_serial;
1053 struct edgeport_port *edge_port;
1054 int status;
1055
1056 edge_serial = usb_get_serial_data(port->serial);
1057 edge_port = usb_get_serial_port_data(port);
1058 if (edge_serial == NULL || edge_port == NULL)
1059 return;
1060
1061 /* block until tx is empty */
1062 block_until_tx_empty(edge_port);
1063
1064 edge_port->closePending = true;
1065
1066 if (!edge_serial->is_epic ||
1067 edge_serial->epic_descriptor.Supports.IOSPChase) {
1068 /* flush and chase */
1069 edge_port->chaseResponsePending = true;
1070
1071 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1072 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1073 if (status == 0)
1074 /* block until chase finished */
1075 block_until_chase_response(edge_port);
1076 else
1077 edge_port->chaseResponsePending = false;
1078 }
1079
1080 if (!edge_serial->is_epic ||
1081 edge_serial->epic_descriptor.Supports.IOSPClose) {
1082 /* close the port */
1083 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1084 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1085 }
1086
1087 /* port->close = true; */
1088 edge_port->closePending = false;
1089 edge_port->open = false;
1090 edge_port->openPending = false;
1091
1092 usb_kill_urb(edge_port->write_urb);
1093
1094 if (edge_port->write_urb) {
1095 /* if this urb had a transfer buffer already
1096 (old transfer) free it */
1097 kfree(edge_port->write_urb->transfer_buffer);
1098 usb_free_urb(edge_port->write_urb);
1099 edge_port->write_urb = NULL;
1100 }
1101 kfree(edge_port->txfifo.fifo);
1102 edge_port->txfifo.fifo = NULL;
1103}
1104
1105/*****************************************************************************
1106 * SerialWrite
1107 * this function is called by the tty driver when data should be written
1108 * to the port.
1109 * If successful, we return the number of bytes written, otherwise we
1110 * return a negative error number.
1111 *****************************************************************************/
1112static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1113 const unsigned char *data, int count)
1114{
1115 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1116 struct TxFifo *fifo;
1117 int copySize;
1118 int bytesleft;
1119 int firsthalf;
1120 int secondhalf;
1121 unsigned long flags;
1122
1123 if (edge_port == NULL)
1124 return -ENODEV;
1125
1126 /* get a pointer to the Tx fifo */
1127 fifo = &edge_port->txfifo;
1128
1129 spin_lock_irqsave(&edge_port->ep_lock, flags);
1130
1131 /* calculate number of bytes to put in fifo */
1132 copySize = min((unsigned int)count,
1133 (edge_port->txCredits - fifo->count));
1134
1135 dev_dbg(&port->dev, "%s of %d byte(s) Fifo room %d -- will copy %d bytes\n",
1136 __func__, count, edge_port->txCredits - fifo->count, copySize);
1137
1138 /* catch writes of 0 bytes which the tty driver likes to give us,
1139 and when txCredits is empty */
1140 if (copySize == 0) {
1141 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1142 goto finish_write;
1143 }
1144
1145 /* queue the data
1146 * since we can never overflow the buffer we do not have to check for a
1147 * full condition
1148 *
1149 * the copy is done is two parts -- first fill to the end of the buffer
1150 * then copy the reset from the start of the buffer
1151 */
1152 bytesleft = fifo->size - fifo->head;
1153 firsthalf = min(bytesleft, copySize);
1154 dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1155 firsthalf, bytesleft);
1156
1157 /* now copy our data */
1158 memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1159 usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1160
1161 /* update the index and size */
1162 fifo->head += firsthalf;
1163 fifo->count += firsthalf;
1164
1165 /* wrap the index */
1166 if (fifo->head == fifo->size)
1167 fifo->head = 0;
1168
1169 secondhalf = copySize-firsthalf;
1170
1171 if (secondhalf) {
1172 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1173 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1174 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1175 /* update the index and size */
1176 fifo->count += secondhalf;
1177 fifo->head += secondhalf;
1178 /* No need to check for wrap since we can not get to end of
1179 * the fifo in this part
1180 */
1181 }
1182
1183finish_write:
1184 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1185
1186 send_more_port_data((struct edgeport_serial *)
1187 usb_get_serial_data(port->serial), edge_port);
1188
1189 dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1190 __func__, copySize, edge_port->txCredits, fifo->count);
1191
1192 return copySize;
1193}
1194
1195
1196/************************************************************************
1197 *
1198 * send_more_port_data()
1199 *
1200 * This routine attempts to write additional UART transmit data
1201 * to a port over the USB bulk pipe. It is called (1) when new
1202 * data has been written to a port's TxBuffer from higher layers
1203 * (2) when the peripheral sends us additional TxCredits indicating
1204 * that it can accept more Tx data for a given port; and (3) when
1205 * a bulk write completes successfully and we want to see if we
1206 * can transmit more.
1207 *
1208 ************************************************************************/
1209static void send_more_port_data(struct edgeport_serial *edge_serial,
1210 struct edgeport_port *edge_port)
1211{
1212 struct TxFifo *fifo = &edge_port->txfifo;
1213 struct device *dev = &edge_port->port->dev;
1214 struct urb *urb;
1215 unsigned char *buffer;
1216 int status;
1217 int count;
1218 int bytesleft;
1219 int firsthalf;
1220 int secondhalf;
1221 unsigned long flags;
1222
1223 spin_lock_irqsave(&edge_port->ep_lock, flags);
1224
1225 if (edge_port->write_in_progress ||
1226 !edge_port->open ||
1227 (fifo->count == 0)) {
1228 dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
1229 __func__, fifo->count, edge_port->write_in_progress);
1230 goto exit_send;
1231 }
1232
1233 /* since the amount of data in the fifo will always fit into the
1234 * edgeport buffer we do not need to check the write length
1235 *
1236 * Do we have enough credits for this port to make it worthwhile
1237 * to bother queueing a write. If it's too small, say a few bytes,
1238 * it's better to wait for more credits so we can do a larger write.
1239 */
1240 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1241 dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
1242 __func__, fifo->count, edge_port->txCredits);
1243 goto exit_send;
1244 }
1245
1246 /* lock this write */
1247 edge_port->write_in_progress = true;
1248
1249 /* get a pointer to the write_urb */
1250 urb = edge_port->write_urb;
1251
1252 /* make sure transfer buffer is freed */
1253 kfree(urb->transfer_buffer);
1254 urb->transfer_buffer = NULL;
1255
1256 /* build the data header for the buffer and port that we are about
1257 to send out */
1258 count = fifo->count;
1259 buffer = kmalloc(count+2, GFP_ATOMIC);
1260 if (!buffer) {
1261 edge_port->write_in_progress = false;
1262 goto exit_send;
1263 }
1264 buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
1265 buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
1266
1267 /* now copy our data */
1268 bytesleft = fifo->size - fifo->tail;
1269 firsthalf = min(bytesleft, count);
1270 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1271 fifo->tail += firsthalf;
1272 fifo->count -= firsthalf;
1273 if (fifo->tail == fifo->size)
1274 fifo->tail = 0;
1275
1276 secondhalf = count-firsthalf;
1277 if (secondhalf) {
1278 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1279 secondhalf);
1280 fifo->tail += secondhalf;
1281 fifo->count -= secondhalf;
1282 }
1283
1284 if (count)
1285 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1286
1287 /* fill up the urb with all of our data and submit it */
1288 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1289 usb_sndbulkpipe(edge_serial->serial->dev,
1290 edge_serial->bulk_out_endpoint),
1291 buffer, count+2,
1292 edge_bulk_out_data_callback, edge_port);
1293
1294 /* decrement the number of credits we have by the number we just sent */
1295 edge_port->txCredits -= count;
1296 edge_port->port->icount.tx += count;
1297
1298 status = usb_submit_urb(urb, GFP_ATOMIC);
1299 if (status) {
1300 /* something went wrong */
1301 dev_err_console(edge_port->port,
1302 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1303 __func__, status);
1304 edge_port->write_in_progress = false;
1305
1306 /* revert the credits as something bad happened. */
1307 edge_port->txCredits += count;
1308 edge_port->port->icount.tx -= count;
1309 }
1310 dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1311 __func__, count, edge_port->txCredits, fifo->count);
1312
1313exit_send:
1314 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1315}
1316
1317
1318/*****************************************************************************
1319 * edge_write_room
1320 * this function is called by the tty driver when it wants to know how
1321 * many bytes of data we can accept for a specific port.
1322 *****************************************************************************/
1323static unsigned int edge_write_room(struct tty_struct *tty)
1324{
1325 struct usb_serial_port *port = tty->driver_data;
1326 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1327 unsigned int room;
1328 unsigned long flags;
1329
1330 /* total of both buffers is still txCredit */
1331 spin_lock_irqsave(&edge_port->ep_lock, flags);
1332 room = edge_port->txCredits - edge_port->txfifo.count;
1333 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1334
1335 dev_dbg(&port->dev, "%s - returns %u\n", __func__, room);
1336 return room;
1337}
1338
1339
1340/*****************************************************************************
1341 * edge_chars_in_buffer
1342 * this function is called by the tty driver when it wants to know how
1343 * many bytes of data we currently have outstanding in the port (data that
1344 * has been written, but hasn't made it out the port yet)
1345 *****************************************************************************/
1346static unsigned int edge_chars_in_buffer(struct tty_struct *tty)
1347{
1348 struct usb_serial_port *port = tty->driver_data;
1349 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1350 unsigned int num_chars;
1351 unsigned long flags;
1352
1353 spin_lock_irqsave(&edge_port->ep_lock, flags);
1354 num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1355 edge_port->txfifo.count;
1356 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1357 if (num_chars) {
1358 dev_dbg(&port->dev, "%s - returns %u\n", __func__, num_chars);
1359 }
1360
1361 return num_chars;
1362}
1363
1364
1365/*****************************************************************************
1366 * SerialThrottle
1367 * this function is called by the tty driver when it wants to stop the data
1368 * being read from the port.
1369 *****************************************************************************/
1370static void edge_throttle(struct tty_struct *tty)
1371{
1372 struct usb_serial_port *port = tty->driver_data;
1373 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1374 int status;
1375
1376 if (edge_port == NULL)
1377 return;
1378
1379 if (!edge_port->open) {
1380 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1381 return;
1382 }
1383
1384 /* if we are implementing XON/XOFF, send the stop character */
1385 if (I_IXOFF(tty)) {
1386 unsigned char stop_char = STOP_CHAR(tty);
1387 status = edge_write(tty, port, &stop_char, 1);
1388 if (status <= 0)
1389 return;
1390 }
1391
1392 /* if we are implementing RTS/CTS, toggle that line */
1393 if (C_CRTSCTS(tty)) {
1394 edge_port->shadowMCR &= ~MCR_RTS;
1395 status = send_cmd_write_uart_register(edge_port, MCR,
1396 edge_port->shadowMCR);
1397 if (status != 0)
1398 return;
1399 }
1400}
1401
1402
1403/*****************************************************************************
1404 * edge_unthrottle
1405 * this function is called by the tty driver when it wants to resume the
1406 * data being read from the port (called after SerialThrottle is called)
1407 *****************************************************************************/
1408static void edge_unthrottle(struct tty_struct *tty)
1409{
1410 struct usb_serial_port *port = tty->driver_data;
1411 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1412 int status;
1413
1414 if (edge_port == NULL)
1415 return;
1416
1417 if (!edge_port->open) {
1418 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1419 return;
1420 }
1421
1422 /* if we are implementing XON/XOFF, send the start character */
1423 if (I_IXOFF(tty)) {
1424 unsigned char start_char = START_CHAR(tty);
1425 status = edge_write(tty, port, &start_char, 1);
1426 if (status <= 0)
1427 return;
1428 }
1429 /* if we are implementing RTS/CTS, toggle that line */
1430 if (C_CRTSCTS(tty)) {
1431 edge_port->shadowMCR |= MCR_RTS;
1432 send_cmd_write_uart_register(edge_port, MCR,
1433 edge_port->shadowMCR);
1434 }
1435}
1436
1437
1438/*****************************************************************************
1439 * SerialSetTermios
1440 * this function is called by the tty driver when it wants to change
1441 * the termios structure
1442 *****************************************************************************/
1443static void edge_set_termios(struct tty_struct *tty,
1444 struct usb_serial_port *port,
1445 const struct ktermios *old_termios)
1446{
1447 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1448
1449 if (edge_port == NULL)
1450 return;
1451
1452 if (!edge_port->open) {
1453 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1454 return;
1455 }
1456
1457 /* change the port settings to the new ones specified */
1458 change_port_settings(tty, edge_port, old_termios);
1459}
1460
1461
1462/*****************************************************************************
1463 * get_lsr_info - get line status register info
1464 *
1465 * Purpose: Let user call ioctl() to get info when the UART physically
1466 * is emptied. On bus types like RS485, the transmitter must
1467 * release the bus after transmitting. This must be done when
1468 * the transmit shift register is empty, not be done when the
1469 * transmit holding register is empty. This functionality
1470 * allows an RS485 driver to be written in user space.
1471 *****************************************************************************/
1472static int get_lsr_info(struct edgeport_port *edge_port,
1473 unsigned int __user *value)
1474{
1475 unsigned int result = 0;
1476 unsigned long flags;
1477
1478 spin_lock_irqsave(&edge_port->ep_lock, flags);
1479 if (edge_port->maxTxCredits == edge_port->txCredits &&
1480 edge_port->txfifo.count == 0) {
1481 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1482 result = TIOCSER_TEMT;
1483 }
1484 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1485
1486 if (copy_to_user(value, &result, sizeof(int)))
1487 return -EFAULT;
1488 return 0;
1489}
1490
1491static int edge_tiocmset(struct tty_struct *tty,
1492 unsigned int set, unsigned int clear)
1493{
1494 struct usb_serial_port *port = tty->driver_data;
1495 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1496 unsigned int mcr;
1497
1498 mcr = edge_port->shadowMCR;
1499 if (set & TIOCM_RTS)
1500 mcr |= MCR_RTS;
1501 if (set & TIOCM_DTR)
1502 mcr |= MCR_DTR;
1503 if (set & TIOCM_LOOP)
1504 mcr |= MCR_LOOPBACK;
1505
1506 if (clear & TIOCM_RTS)
1507 mcr &= ~MCR_RTS;
1508 if (clear & TIOCM_DTR)
1509 mcr &= ~MCR_DTR;
1510 if (clear & TIOCM_LOOP)
1511 mcr &= ~MCR_LOOPBACK;
1512
1513 edge_port->shadowMCR = mcr;
1514
1515 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1516
1517 return 0;
1518}
1519
1520static int edge_tiocmget(struct tty_struct *tty)
1521{
1522 struct usb_serial_port *port = tty->driver_data;
1523 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1524 unsigned int result = 0;
1525 unsigned int msr;
1526 unsigned int mcr;
1527
1528 msr = edge_port->shadowMSR;
1529 mcr = edge_port->shadowMCR;
1530 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1531 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1532 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1533 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
1534 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1535 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1536
1537 return result;
1538}
1539
1540/*****************************************************************************
1541 * SerialIoctl
1542 * this function handles any ioctl calls to the driver
1543 *****************************************************************************/
1544static int edge_ioctl(struct tty_struct *tty,
1545 unsigned int cmd, unsigned long arg)
1546{
1547 struct usb_serial_port *port = tty->driver_data;
1548 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1549
1550 switch (cmd) {
1551 case TIOCSERGETLSR:
1552 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1553 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1554 }
1555 return -ENOIOCTLCMD;
1556}
1557
1558
1559/*****************************************************************************
1560 * SerialBreak
1561 * this function sends a break to the port
1562 *****************************************************************************/
1563static int edge_break(struct tty_struct *tty, int break_state)
1564{
1565 struct usb_serial_port *port = tty->driver_data;
1566 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1567 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1568 int status = 0;
1569
1570 if (!edge_serial->is_epic ||
1571 edge_serial->epic_descriptor.Supports.IOSPChase) {
1572 /* flush and chase */
1573 edge_port->chaseResponsePending = true;
1574
1575 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1576 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1577 if (status == 0) {
1578 /* block until chase finished */
1579 block_until_chase_response(edge_port);
1580 } else {
1581 edge_port->chaseResponsePending = false;
1582 }
1583 }
1584
1585 if (!edge_serial->is_epic ||
1586 edge_serial->epic_descriptor.Supports.IOSPSetClrBreak) {
1587 if (break_state == -1) {
1588 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1589 status = send_iosp_ext_cmd(edge_port,
1590 IOSP_CMD_SET_BREAK, 0);
1591 } else {
1592 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1593 status = send_iosp_ext_cmd(edge_port,
1594 IOSP_CMD_CLEAR_BREAK, 0);
1595 }
1596 if (status)
1597 dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1598 __func__);
1599 }
1600
1601 return status;
1602}
1603
1604
1605/*****************************************************************************
1606 * process_rcvd_data
1607 * this function handles the data received on the bulk in pipe.
1608 *****************************************************************************/
1609static void process_rcvd_data(struct edgeport_serial *edge_serial,
1610 unsigned char *buffer, __u16 bufferLength)
1611{
1612 struct usb_serial *serial = edge_serial->serial;
1613 struct device *dev = &serial->dev->dev;
1614 struct usb_serial_port *port;
1615 struct edgeport_port *edge_port;
1616 __u16 lastBufferLength;
1617 __u16 rxLen;
1618
1619 lastBufferLength = bufferLength + 1;
1620
1621 while (bufferLength > 0) {
1622 /* failsafe incase we get a message that we don't understand */
1623 if (lastBufferLength == bufferLength) {
1624 dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1625 break;
1626 }
1627 lastBufferLength = bufferLength;
1628
1629 switch (edge_serial->rxState) {
1630 case EXPECT_HDR1:
1631 edge_serial->rxHeader1 = *buffer;
1632 ++buffer;
1633 --bufferLength;
1634
1635 if (bufferLength == 0) {
1636 edge_serial->rxState = EXPECT_HDR2;
1637 break;
1638 }
1639 fallthrough;
1640 case EXPECT_HDR2:
1641 edge_serial->rxHeader2 = *buffer;
1642 ++buffer;
1643 --bufferLength;
1644
1645 dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1646 edge_serial->rxHeader1, edge_serial->rxHeader2);
1647 /* Process depending on whether this header is
1648 * data or status */
1649
1650 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1651 /* Decode this status header and go to
1652 * EXPECT_HDR1 (if we can process the status
1653 * with only 2 bytes), or go to EXPECT_HDR3 to
1654 * get the third byte. */
1655 edge_serial->rxPort =
1656 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1657 edge_serial->rxStatusCode =
1658 IOSP_GET_STATUS_CODE(
1659 edge_serial->rxHeader1);
1660
1661 if (!IOSP_STATUS_IS_2BYTE(
1662 edge_serial->rxStatusCode)) {
1663 /* This status needs additional bytes.
1664 * Save what we have and then wait for
1665 * more data.
1666 */
1667 edge_serial->rxStatusParam
1668 = edge_serial->rxHeader2;
1669 edge_serial->rxState = EXPECT_HDR3;
1670 break;
1671 }
1672 /* We have all the header bytes, process the
1673 status now */
1674 process_rcvd_status(edge_serial,
1675 edge_serial->rxHeader2, 0);
1676 edge_serial->rxState = EXPECT_HDR1;
1677 break;
1678 }
1679
1680 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1681 edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1,
1682 edge_serial->rxHeader2);
1683 dev_dbg(dev, "%s - Data for Port %u Len %u\n", __func__,
1684 edge_serial->rxPort,
1685 edge_serial->rxBytesRemaining);
1686
1687 if (bufferLength == 0) {
1688 edge_serial->rxState = EXPECT_DATA;
1689 break;
1690 }
1691 fallthrough;
1692 case EXPECT_DATA: /* Expect data */
1693 if (bufferLength < edge_serial->rxBytesRemaining) {
1694 rxLen = bufferLength;
1695 /* Expect data to start next buffer */
1696 edge_serial->rxState = EXPECT_DATA;
1697 } else {
1698 /* BufLen >= RxBytesRemaining */
1699 rxLen = edge_serial->rxBytesRemaining;
1700 /* Start another header next time */
1701 edge_serial->rxState = EXPECT_HDR1;
1702 }
1703
1704 bufferLength -= rxLen;
1705 edge_serial->rxBytesRemaining -= rxLen;
1706
1707 /* spit this data back into the tty driver if this
1708 port is open */
1709 if (rxLen && edge_serial->rxPort < serial->num_ports) {
1710 port = serial->port[edge_serial->rxPort];
1711 edge_port = usb_get_serial_port_data(port);
1712 if (edge_port && edge_port->open) {
1713 dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1714 __func__, rxLen,
1715 edge_serial->rxPort);
1716 edge_tty_recv(edge_port->port, buffer,
1717 rxLen);
1718 edge_port->port->icount.rx += rxLen;
1719 }
1720 }
1721 buffer += rxLen;
1722 break;
1723
1724 case EXPECT_HDR3: /* Expect 3rd byte of status header */
1725 edge_serial->rxHeader3 = *buffer;
1726 ++buffer;
1727 --bufferLength;
1728
1729 /* We have all the header bytes, process the
1730 status now */
1731 process_rcvd_status(edge_serial,
1732 edge_serial->rxStatusParam,
1733 edge_serial->rxHeader3);
1734 edge_serial->rxState = EXPECT_HDR1;
1735 break;
1736 }
1737 }
1738}
1739
1740
1741/*****************************************************************************
1742 * process_rcvd_status
1743 * this function handles the any status messages received on the
1744 * bulk in pipe.
1745 *****************************************************************************/
1746static void process_rcvd_status(struct edgeport_serial *edge_serial,
1747 __u8 byte2, __u8 byte3)
1748{
1749 struct usb_serial_port *port;
1750 struct edgeport_port *edge_port;
1751 struct tty_struct *tty;
1752 struct device *dev;
1753 __u8 code = edge_serial->rxStatusCode;
1754
1755 /* switch the port pointer to the one being currently talked about */
1756 if (edge_serial->rxPort >= edge_serial->serial->num_ports)
1757 return;
1758 port = edge_serial->serial->port[edge_serial->rxPort];
1759 edge_port = usb_get_serial_port_data(port);
1760 if (edge_port == NULL) {
1761 dev_err(&edge_serial->serial->dev->dev,
1762 "%s - edge_port == NULL for port %d\n",
1763 __func__, edge_serial->rxPort);
1764 return;
1765 }
1766 dev = &port->dev;
1767
1768 if (code == IOSP_EXT_STATUS) {
1769 switch (byte2) {
1770 case IOSP_EXT_STATUS_CHASE_RSP:
1771 /* we want to do EXT status regardless of port
1772 * open/closed */
1773 dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1774 __func__, edge_serial->rxPort, byte3);
1775 /* Currently, the only EXT_STATUS is Chase, so process
1776 * here instead of one more call to one more subroutine
1777 * If/when more EXT_STATUS, there'll be more work to do
1778 * Also, we currently clear flag and close the port
1779 * regardless of content of above's Byte3.
1780 * We could choose to do something else when Byte3 says
1781 * Timeout on Chase from Edgeport, like wait longer in
1782 * block_until_chase_response, but for now we don't.
1783 */
1784 edge_port->chaseResponsePending = false;
1785 wake_up(&edge_port->wait_chase);
1786 return;
1787
1788 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1789 dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1790 __func__, edge_serial->rxPort, byte3);
1791 /* Port->RxCheckRsp = true; */
1792 return;
1793 }
1794 }
1795
1796 if (code == IOSP_STATUS_OPEN_RSP) {
1797 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1798 edge_port->maxTxCredits = edge_port->txCredits;
1799 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1800 __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1801 handle_new_msr(edge_port, byte2);
1802
1803 /* send the current line settings to the port so we are
1804 in sync with any further termios calls */
1805 tty = tty_port_tty_get(&edge_port->port->port);
1806 if (tty) {
1807 change_port_settings(tty,
1808 edge_port, &tty->termios);
1809 tty_kref_put(tty);
1810 }
1811
1812 /* we have completed the open */
1813 edge_port->openPending = false;
1814 edge_port->open = true;
1815 wake_up(&edge_port->wait_open);
1816 return;
1817 }
1818
1819 /* If port is closed, silently discard all rcvd status. We can
1820 * have cases where buffered status is received AFTER the close
1821 * port command is sent to the Edgeport.
1822 */
1823 if (!edge_port->open || edge_port->closePending)
1824 return;
1825
1826 switch (code) {
1827 /* Not currently sent by Edgeport */
1828 case IOSP_STATUS_LSR:
1829 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1830 __func__, edge_serial->rxPort, byte2);
1831 handle_new_lsr(edge_port, false, byte2, 0);
1832 break;
1833
1834 case IOSP_STATUS_LSR_DATA:
1835 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1836 __func__, edge_serial->rxPort, byte2, byte3);
1837 /* byte2 is LSR Register */
1838 /* byte3 is broken data byte */
1839 handle_new_lsr(edge_port, true, byte2, byte3);
1840 break;
1841 /*
1842 * case IOSP_EXT_4_STATUS:
1843 * dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1844 * __func__, edge_serial->rxPort, byte2, byte3);
1845 * break;
1846 */
1847 case IOSP_STATUS_MSR:
1848 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1849 __func__, edge_serial->rxPort, byte2);
1850 /*
1851 * Process this new modem status and generate appropriate
1852 * events, etc, based on the new status. This routine
1853 * also saves the MSR in Port->ShadowMsr.
1854 */
1855 handle_new_msr(edge_port, byte2);
1856 break;
1857
1858 default:
1859 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
1860 break;
1861 }
1862}
1863
1864
1865/*****************************************************************************
1866 * edge_tty_recv
1867 * this function passes data on to the tty flip buffer
1868 *****************************************************************************/
1869static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1870 int length)
1871{
1872 int cnt;
1873
1874 cnt = tty_insert_flip_string(&port->port, data, length);
1875 if (cnt < length) {
1876 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1877 __func__, length - cnt);
1878 }
1879 data += cnt;
1880 length -= cnt;
1881
1882 tty_flip_buffer_push(&port->port);
1883}
1884
1885
1886/*****************************************************************************
1887 * handle_new_msr
1888 * this function handles any change to the msr register for a port.
1889 *****************************************************************************/
1890static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
1891{
1892 struct async_icount *icount;
1893
1894 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1895 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1896 icount = &edge_port->port->icount;
1897
1898 /* update input line counters */
1899 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
1900 icount->cts++;
1901 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
1902 icount->dsr++;
1903 if (newMsr & EDGEPORT_MSR_DELTA_CD)
1904 icount->dcd++;
1905 if (newMsr & EDGEPORT_MSR_DELTA_RI)
1906 icount->rng++;
1907 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1908 }
1909
1910 /* Save the new modem status */
1911 edge_port->shadowMSR = newMsr & 0xf0;
1912}
1913
1914
1915/*****************************************************************************
1916 * handle_new_lsr
1917 * this function handles any change to the lsr register for a port.
1918 *****************************************************************************/
1919static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
1920 __u8 lsr, __u8 data)
1921{
1922 __u8 newLsr = (__u8) (lsr & (__u8)
1923 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
1924 struct async_icount *icount;
1925
1926 edge_port->shadowLSR = lsr;
1927
1928 if (newLsr & LSR_BREAK) {
1929 /*
1930 * Parity and Framing errors only count if they
1931 * occur exclusive of a break being
1932 * received.
1933 */
1934 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1935 }
1936
1937 /* Place LSR data byte into Rx buffer */
1938 if (lsrData)
1939 edge_tty_recv(edge_port->port, &data, 1);
1940
1941 /* update input line counters */
1942 icount = &edge_port->port->icount;
1943 if (newLsr & LSR_BREAK)
1944 icount->brk++;
1945 if (newLsr & LSR_OVER_ERR)
1946 icount->overrun++;
1947 if (newLsr & LSR_PAR_ERR)
1948 icount->parity++;
1949 if (newLsr & LSR_FRM_ERR)
1950 icount->frame++;
1951}
1952
1953
1954/****************************************************************************
1955 * sram_write
1956 * writes a number of bytes to the Edgeport device's sram starting at the
1957 * given address.
1958 * If successful returns the number of bytes written, otherwise it returns
1959 * a negative error number of the problem.
1960 ****************************************************************************/
1961static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
1962 __u16 length, const __u8 *data)
1963{
1964 int result;
1965 __u16 current_length;
1966 unsigned char *transfer_buffer;
1967
1968 dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
1969
1970 transfer_buffer = kmalloc(64, GFP_KERNEL);
1971 if (!transfer_buffer)
1972 return -ENOMEM;
1973
1974 /* need to split these writes up into 64 byte chunks */
1975 result = 0;
1976 while (length > 0) {
1977 if (length > 64)
1978 current_length = 64;
1979 else
1980 current_length = length;
1981
1982/* dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
1983 memcpy(transfer_buffer, data, current_length);
1984 result = usb_control_msg(serial->dev,
1985 usb_sndctrlpipe(serial->dev, 0),
1986 USB_REQUEST_ION_WRITE_RAM,
1987 0x40, addr, extAddr, transfer_buffer,
1988 current_length, 300);
1989 if (result < 0)
1990 break;
1991 length -= current_length;
1992 addr += current_length;
1993 data += current_length;
1994 }
1995
1996 kfree(transfer_buffer);
1997 return result;
1998}
1999
2000
2001/****************************************************************************
2002 * rom_write
2003 * writes a number of bytes to the Edgeport device's ROM starting at the
2004 * given address.
2005 * If successful returns the number of bytes written, otherwise it returns
2006 * a negative error number of the problem.
2007 ****************************************************************************/
2008static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2009 __u16 length, const __u8 *data)
2010{
2011 int result;
2012 __u16 current_length;
2013 unsigned char *transfer_buffer;
2014
2015 transfer_buffer = kmalloc(64, GFP_KERNEL);
2016 if (!transfer_buffer)
2017 return -ENOMEM;
2018
2019 /* need to split these writes up into 64 byte chunks */
2020 result = 0;
2021 while (length > 0) {
2022 if (length > 64)
2023 current_length = 64;
2024 else
2025 current_length = length;
2026 memcpy(transfer_buffer, data, current_length);
2027 result = usb_control_msg(serial->dev,
2028 usb_sndctrlpipe(serial->dev, 0),
2029 USB_REQUEST_ION_WRITE_ROM, 0x40,
2030 addr, extAddr,
2031 transfer_buffer, current_length, 300);
2032 if (result < 0)
2033 break;
2034 length -= current_length;
2035 addr += current_length;
2036 data += current_length;
2037 }
2038
2039 kfree(transfer_buffer);
2040 return result;
2041}
2042
2043
2044/****************************************************************************
2045 * rom_read
2046 * reads a number of bytes from the Edgeport device starting at the given
2047 * address.
2048 * Returns zero on success or a negative error number.
2049 ****************************************************************************/
2050static int rom_read(struct usb_serial *serial, __u16 extAddr,
2051 __u16 addr, __u16 length, __u8 *data)
2052{
2053 int result;
2054 __u16 current_length;
2055 unsigned char *transfer_buffer;
2056
2057 transfer_buffer = kmalloc(64, GFP_KERNEL);
2058 if (!transfer_buffer)
2059 return -ENOMEM;
2060
2061 /* need to split these reads up into 64 byte chunks */
2062 result = 0;
2063 while (length > 0) {
2064 if (length > 64)
2065 current_length = 64;
2066 else
2067 current_length = length;
2068 result = usb_control_msg(serial->dev,
2069 usb_rcvctrlpipe(serial->dev, 0),
2070 USB_REQUEST_ION_READ_ROM,
2071 0xC0, addr, extAddr, transfer_buffer,
2072 current_length, 300);
2073 if (result < current_length) {
2074 if (result >= 0)
2075 result = -EIO;
2076 break;
2077 }
2078 memcpy(data, transfer_buffer, current_length);
2079 length -= current_length;
2080 addr += current_length;
2081 data += current_length;
2082
2083 result = 0;
2084 }
2085
2086 kfree(transfer_buffer);
2087 return result;
2088}
2089
2090
2091/****************************************************************************
2092 * send_iosp_ext_cmd
2093 * Is used to send a IOSP message to the Edgeport device
2094 ****************************************************************************/
2095static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2096 __u8 command, __u8 param)
2097{
2098 unsigned char *buffer;
2099 unsigned char *currentCommand;
2100 int length = 0;
2101 int status = 0;
2102
2103 buffer = kmalloc(10, GFP_ATOMIC);
2104 if (!buffer)
2105 return -ENOMEM;
2106
2107 currentCommand = buffer;
2108
2109 MAKE_CMD_EXT_CMD(¤tCommand, &length, edge_port->port->port_number,
2110 command, param);
2111
2112 status = write_cmd_usb(edge_port, buffer, length);
2113 if (status) {
2114 /* something bad happened, let's free up the memory */
2115 kfree(buffer);
2116 }
2117
2118 return status;
2119}
2120
2121
2122/*****************************************************************************
2123 * write_cmd_usb
2124 * this function writes the given buffer out to the bulk write endpoint.
2125 *****************************************************************************/
2126static int write_cmd_usb(struct edgeport_port *edge_port,
2127 unsigned char *buffer, int length)
2128{
2129 struct edgeport_serial *edge_serial =
2130 usb_get_serial_data(edge_port->port->serial);
2131 struct device *dev = &edge_port->port->dev;
2132 int status = 0;
2133 struct urb *urb;
2134
2135 usb_serial_debug_data(dev, __func__, length, buffer);
2136
2137 /* Allocate our next urb */
2138 urb = usb_alloc_urb(0, GFP_ATOMIC);
2139 if (!urb)
2140 return -ENOMEM;
2141
2142 atomic_inc(&CmdUrbs);
2143 dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2144 __func__, urb, atomic_read(&CmdUrbs));
2145
2146 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2147 usb_sndbulkpipe(edge_serial->serial->dev,
2148 edge_serial->bulk_out_endpoint),
2149 buffer, length, edge_bulk_out_cmd_callback, edge_port);
2150
2151 edge_port->commandPending = true;
2152 status = usb_submit_urb(urb, GFP_ATOMIC);
2153
2154 if (status) {
2155 /* something went wrong */
2156 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2157 __func__, status);
2158 usb_free_urb(urb);
2159 atomic_dec(&CmdUrbs);
2160 return status;
2161 }
2162
2163#if 0
2164 wait_event(&edge_port->wait_command, !edge_port->commandPending);
2165
2166 if (edge_port->commandPending) {
2167 /* command timed out */
2168 dev_dbg(dev, "%s - command timed out\n", __func__);
2169 status = -EINVAL;
2170 }
2171#endif
2172 return status;
2173}
2174
2175
2176/*****************************************************************************
2177 * send_cmd_write_baud_rate
2178 * this function sends the proper command to change the baud rate of the
2179 * specified port.
2180 *****************************************************************************/
2181static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2182 int baudRate)
2183{
2184 struct edgeport_serial *edge_serial =
2185 usb_get_serial_data(edge_port->port->serial);
2186 struct device *dev = &edge_port->port->dev;
2187 unsigned char *cmdBuffer;
2188 unsigned char *currCmd;
2189 int cmdLen = 0;
2190 int divisor;
2191 int status;
2192 u32 number = edge_port->port->port_number;
2193
2194 if (edge_serial->is_epic &&
2195 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2196 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
2197 baudRate);
2198 return 0;
2199 }
2200
2201 dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
2202
2203 status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2204 if (status) {
2205 dev_err(dev, "%s - bad baud rate\n", __func__);
2206 return status;
2207 }
2208
2209 /* Alloc memory for the string of commands. */
2210 cmdBuffer = kmalloc(0x100, GFP_ATOMIC);
2211 if (!cmdBuffer)
2212 return -ENOMEM;
2213
2214 currCmd = cmdBuffer;
2215
2216 /* Enable access to divisor latch */
2217 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2218
2219 /* Write the divisor itself */
2220 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2221 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2222
2223 /* Restore original value to disable access to divisor latch */
2224 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2225 edge_port->shadowLCR);
2226
2227 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2228 if (status) {
2229 /* something bad happened, let's free up the memory */
2230 kfree(cmdBuffer);
2231 }
2232
2233 return status;
2234}
2235
2236
2237/*****************************************************************************
2238 * calc_baud_rate_divisor
2239 * this function calculates the proper baud rate divisor for the specified
2240 * baud rate.
2241 *****************************************************************************/
2242static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2243{
2244 int i;
2245 __u16 custom;
2246
2247 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2248 if (divisor_table[i].BaudRate == baudrate) {
2249 *divisor = divisor_table[i].Divisor;
2250 return 0;
2251 }
2252 }
2253
2254 /* We have tried all of the standard baud rates
2255 * lets try to calculate the divisor for this baud rate
2256 * Make sure the baud rate is reasonable */
2257 if (baudrate > 50 && baudrate < 230400) {
2258 /* get divisor */
2259 custom = (__u16)((230400L + baudrate/2) / baudrate);
2260
2261 *divisor = custom;
2262
2263 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2264 return 0;
2265 }
2266
2267 return -1;
2268}
2269
2270
2271/*****************************************************************************
2272 * send_cmd_write_uart_register
2273 * this function builds up a uart register message and sends to the device.
2274 *****************************************************************************/
2275static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2276 __u8 regNum, __u8 regValue)
2277{
2278 struct edgeport_serial *edge_serial =
2279 usb_get_serial_data(edge_port->port->serial);
2280 struct device *dev = &edge_port->port->dev;
2281 unsigned char *cmdBuffer;
2282 unsigned char *currCmd;
2283 unsigned long cmdLen = 0;
2284 int status;
2285
2286 dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2287 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2288
2289 if (edge_serial->is_epic &&
2290 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2291 regNum == MCR) {
2292 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2293 return 0;
2294 }
2295
2296 if (edge_serial->is_epic &&
2297 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2298 regNum == LCR) {
2299 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2300 return 0;
2301 }
2302
2303 /* Alloc memory for the string of commands. */
2304 cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2305 if (cmdBuffer == NULL)
2306 return -ENOMEM;
2307
2308 currCmd = cmdBuffer;
2309
2310 /* Build a cmd in the buffer to write the given register */
2311 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
2312 regNum, regValue);
2313
2314 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2315 if (status) {
2316 /* something bad happened, let's free up the memory */
2317 kfree(cmdBuffer);
2318 }
2319
2320 return status;
2321}
2322
2323
2324/*****************************************************************************
2325 * change_port_settings
2326 * This routine is called to set the UART on the device to match the
2327 * specified new settings.
2328 *****************************************************************************/
2329
2330static void change_port_settings(struct tty_struct *tty,
2331 struct edgeport_port *edge_port, const struct ktermios *old_termios)
2332{
2333 struct device *dev = &edge_port->port->dev;
2334 struct edgeport_serial *edge_serial =
2335 usb_get_serial_data(edge_port->port->serial);
2336 int baud;
2337 unsigned cflag;
2338 __u8 mask = 0xff;
2339 __u8 lData;
2340 __u8 lParity;
2341 __u8 lStop;
2342 __u8 rxFlow;
2343 __u8 txFlow;
2344 int status;
2345
2346 if (!edge_port->open &&
2347 !edge_port->openPending) {
2348 dev_dbg(dev, "%s - port not opened\n", __func__);
2349 return;
2350 }
2351
2352 cflag = tty->termios.c_cflag;
2353
2354 switch (cflag & CSIZE) {
2355 case CS5:
2356 lData = LCR_BITS_5; mask = 0x1f;
2357 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2358 break;
2359 case CS6:
2360 lData = LCR_BITS_6; mask = 0x3f;
2361 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2362 break;
2363 case CS7:
2364 lData = LCR_BITS_7; mask = 0x7f;
2365 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2366 break;
2367 default:
2368 case CS8:
2369 lData = LCR_BITS_8;
2370 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2371 break;
2372 }
2373
2374 lParity = LCR_PAR_NONE;
2375 if (cflag & PARENB) {
2376 if (cflag & CMSPAR) {
2377 if (cflag & PARODD) {
2378 lParity = LCR_PAR_MARK;
2379 dev_dbg(dev, "%s - parity = mark\n", __func__);
2380 } else {
2381 lParity = LCR_PAR_SPACE;
2382 dev_dbg(dev, "%s - parity = space\n", __func__);
2383 }
2384 } else if (cflag & PARODD) {
2385 lParity = LCR_PAR_ODD;
2386 dev_dbg(dev, "%s - parity = odd\n", __func__);
2387 } else {
2388 lParity = LCR_PAR_EVEN;
2389 dev_dbg(dev, "%s - parity = even\n", __func__);
2390 }
2391 } else {
2392 dev_dbg(dev, "%s - parity = none\n", __func__);
2393 }
2394
2395 if (cflag & CSTOPB) {
2396 lStop = LCR_STOP_2;
2397 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2398 } else {
2399 lStop = LCR_STOP_1;
2400 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2401 }
2402
2403 /* figure out the flow control settings */
2404 rxFlow = txFlow = 0x00;
2405 if (cflag & CRTSCTS) {
2406 rxFlow |= IOSP_RX_FLOW_RTS;
2407 txFlow |= IOSP_TX_FLOW_CTS;
2408 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2409 } else {
2410 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2411 }
2412
2413 /* if we are implementing XON/XOFF, set the start and stop character
2414 in the device */
2415 if (I_IXOFF(tty) || I_IXON(tty)) {
2416 unsigned char stop_char = STOP_CHAR(tty);
2417 unsigned char start_char = START_CHAR(tty);
2418
2419 if (!edge_serial->is_epic ||
2420 edge_serial->epic_descriptor.Supports.IOSPSetXChar) {
2421 send_iosp_ext_cmd(edge_port,
2422 IOSP_CMD_SET_XON_CHAR, start_char);
2423 send_iosp_ext_cmd(edge_port,
2424 IOSP_CMD_SET_XOFF_CHAR, stop_char);
2425 }
2426
2427 /* if we are implementing INBOUND XON/XOFF */
2428 if (I_IXOFF(tty)) {
2429 rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2430 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2431 __func__, start_char, stop_char);
2432 } else {
2433 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2434 }
2435
2436 /* if we are implementing OUTBOUND XON/XOFF */
2437 if (I_IXON(tty)) {
2438 txFlow |= IOSP_TX_FLOW_XON_XOFF;
2439 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2440 __func__, start_char, stop_char);
2441 } else {
2442 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2443 }
2444 }
2445
2446 /* Set flow control to the configured value */
2447 if (!edge_serial->is_epic ||
2448 edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)
2449 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2450 if (!edge_serial->is_epic ||
2451 edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)
2452 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2453
2454
2455 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2456 edge_port->shadowLCR |= (lData | lParity | lStop);
2457
2458 edge_port->validDataMask = mask;
2459
2460 /* Send the updated LCR value to the EdgePort */
2461 status = send_cmd_write_uart_register(edge_port, LCR,
2462 edge_port->shadowLCR);
2463 if (status != 0)
2464 return;
2465
2466 /* set up the MCR register and send it to the EdgePort */
2467 edge_port->shadowMCR = MCR_MASTER_IE;
2468 if (cflag & CBAUD)
2469 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2470
2471 status = send_cmd_write_uart_register(edge_port, MCR,
2472 edge_port->shadowMCR);
2473 if (status != 0)
2474 return;
2475
2476 /* Determine divisor based on baud rate */
2477 baud = tty_get_baud_rate(tty);
2478 if (!baud) {
2479 /* pick a default, any default... */
2480 baud = 9600;
2481 }
2482
2483 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2484 status = send_cmd_write_baud_rate(edge_port, baud);
2485 if (status == -1) {
2486 /* Speed change was not possible - put back the old speed */
2487 baud = tty_termios_baud_rate(old_termios);
2488 tty_encode_baud_rate(tty, baud, baud);
2489 }
2490}
2491
2492
2493/****************************************************************************
2494 * unicode_to_ascii
2495 * Turns a string from Unicode into ASCII.
2496 * Doesn't do a good job with any characters that are outside the normal
2497 * ASCII range, but it's only for debugging...
2498 * NOTE: expects the unicode in LE format
2499 ****************************************************************************/
2500static void unicode_to_ascii(char *string, int buflen,
2501 __le16 *unicode, int unicode_size)
2502{
2503 int i;
2504
2505 if (buflen <= 0) /* never happens, but... */
2506 return;
2507 --buflen; /* space for nul */
2508
2509 for (i = 0; i < unicode_size; i++) {
2510 if (i >= buflen)
2511 break;
2512 string[i] = (char)(le16_to_cpu(unicode[i]));
2513 }
2514 string[i] = 0x00;
2515}
2516
2517
2518/****************************************************************************
2519 * get_manufacturing_desc
2520 * reads in the manufacturing descriptor and stores it into the serial
2521 * structure.
2522 ****************************************************************************/
2523static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2524{
2525 struct device *dev = &edge_serial->serial->dev->dev;
2526 int response;
2527
2528 dev_dbg(dev, "getting manufacturer descriptor\n");
2529
2530 response = rom_read(edge_serial->serial,
2531 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2532 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2533 EDGE_MANUF_DESC_LEN,
2534 (__u8 *)(&edge_serial->manuf_descriptor));
2535
2536 if (response < 0) {
2537 dev_err(dev, "error in getting manufacturer descriptor: %d\n",
2538 response);
2539 } else {
2540 char string[30];
2541 dev_dbg(dev, "**Manufacturer Descriptor\n");
2542 dev_dbg(dev, " RomSize: %dK\n",
2543 edge_serial->manuf_descriptor.RomSize);
2544 dev_dbg(dev, " RamSize: %dK\n",
2545 edge_serial->manuf_descriptor.RamSize);
2546 dev_dbg(dev, " CpuRev: %d\n",
2547 edge_serial->manuf_descriptor.CpuRev);
2548 dev_dbg(dev, " BoardRev: %d\n",
2549 edge_serial->manuf_descriptor.BoardRev);
2550 dev_dbg(dev, " NumPorts: %d\n",
2551 edge_serial->manuf_descriptor.NumPorts);
2552 dev_dbg(dev, " DescDate: %d/%d/%d\n",
2553 edge_serial->manuf_descriptor.DescDate[0],
2554 edge_serial->manuf_descriptor.DescDate[1],
2555 edge_serial->manuf_descriptor.DescDate[2]+1900);
2556 unicode_to_ascii(string, sizeof(string),
2557 edge_serial->manuf_descriptor.SerialNumber,
2558 edge_serial->manuf_descriptor.SerNumLength/2);
2559 dev_dbg(dev, " SerialNumber: %s\n", string);
2560 unicode_to_ascii(string, sizeof(string),
2561 edge_serial->manuf_descriptor.AssemblyNumber,
2562 edge_serial->manuf_descriptor.AssemblyNumLength/2);
2563 dev_dbg(dev, " AssemblyNumber: %s\n", string);
2564 unicode_to_ascii(string, sizeof(string),
2565 edge_serial->manuf_descriptor.OemAssyNumber,
2566 edge_serial->manuf_descriptor.OemAssyNumLength/2);
2567 dev_dbg(dev, " OemAssyNumber: %s\n", string);
2568 dev_dbg(dev, " UartType: %d\n",
2569 edge_serial->manuf_descriptor.UartType);
2570 dev_dbg(dev, " IonPid: %d\n",
2571 edge_serial->manuf_descriptor.IonPid);
2572 dev_dbg(dev, " IonConfig: %d\n",
2573 edge_serial->manuf_descriptor.IonConfig);
2574 }
2575}
2576
2577
2578/****************************************************************************
2579 * get_boot_desc
2580 * reads in the bootloader descriptor and stores it into the serial
2581 * structure.
2582 ****************************************************************************/
2583static void get_boot_desc(struct edgeport_serial *edge_serial)
2584{
2585 struct device *dev = &edge_serial->serial->dev->dev;
2586 int response;
2587
2588 dev_dbg(dev, "getting boot descriptor\n");
2589
2590 response = rom_read(edge_serial->serial,
2591 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2592 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2593 EDGE_BOOT_DESC_LEN,
2594 (__u8 *)(&edge_serial->boot_descriptor));
2595
2596 if (response < 0) {
2597 dev_err(dev, "error in getting boot descriptor: %d\n",
2598 response);
2599 } else {
2600 dev_dbg(dev, "**Boot Descriptor:\n");
2601 dev_dbg(dev, " BootCodeLength: %d\n",
2602 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2603 dev_dbg(dev, " MajorVersion: %d\n",
2604 edge_serial->boot_descriptor.MajorVersion);
2605 dev_dbg(dev, " MinorVersion: %d\n",
2606 edge_serial->boot_descriptor.MinorVersion);
2607 dev_dbg(dev, " BuildNumber: %d\n",
2608 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2609 dev_dbg(dev, " Capabilities: 0x%x\n",
2610 le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2611 dev_dbg(dev, " UConfig0: %d\n",
2612 edge_serial->boot_descriptor.UConfig0);
2613 dev_dbg(dev, " UConfig1: %d\n",
2614 edge_serial->boot_descriptor.UConfig1);
2615 }
2616}
2617
2618
2619/****************************************************************************
2620 * load_application_firmware
2621 * This is called to load the application firmware to the device
2622 ****************************************************************************/
2623static void load_application_firmware(struct edgeport_serial *edge_serial)
2624{
2625 struct device *dev = &edge_serial->serial->dev->dev;
2626 const struct ihex_binrec *rec;
2627 const struct firmware *fw;
2628 const char *fw_name;
2629 const char *fw_info;
2630 int response;
2631 __u32 Operaddr;
2632 __u16 build;
2633
2634 switch (edge_serial->product_info.iDownloadFile) {
2635 case EDGE_DOWNLOAD_FILE_I930:
2636 fw_info = "downloading firmware version (930)";
2637 fw_name = "edgeport/down.fw";
2638 break;
2639
2640 case EDGE_DOWNLOAD_FILE_80251:
2641 fw_info = "downloading firmware version (80251)";
2642 fw_name = "edgeport/down2.fw";
2643 break;
2644
2645 case EDGE_DOWNLOAD_FILE_NONE:
2646 dev_dbg(dev, "No download file specified, skipping download\n");
2647 return;
2648
2649 default:
2650 return;
2651 }
2652
2653 response = request_ihex_firmware(&fw, fw_name,
2654 &edge_serial->serial->dev->dev);
2655 if (response) {
2656 dev_err(dev, "Failed to load image \"%s\" err %d\n",
2657 fw_name, response);
2658 return;
2659 }
2660
2661 rec = (const struct ihex_binrec *)fw->data;
2662 build = (rec->data[2] << 8) | rec->data[3];
2663
2664 dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2665
2666 edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2667 edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2668 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2669
2670 for (rec = ihex_next_binrec(rec); rec;
2671 rec = ihex_next_binrec(rec)) {
2672 Operaddr = be32_to_cpu(rec->addr);
2673 response = sram_write(edge_serial->serial,
2674 Operaddr >> 16,
2675 Operaddr & 0xFFFF,
2676 be16_to_cpu(rec->len),
2677 &rec->data[0]);
2678 if (response < 0) {
2679 dev_err(&edge_serial->serial->dev->dev,
2680 "sram_write failed (%x, %x, %d)\n",
2681 Operaddr >> 16, Operaddr & 0xFFFF,
2682 be16_to_cpu(rec->len));
2683 break;
2684 }
2685 }
2686
2687 dev_dbg(dev, "sending exec_dl_code\n");
2688 response = usb_control_msg (edge_serial->serial->dev,
2689 usb_sndctrlpipe(edge_serial->serial->dev, 0),
2690 USB_REQUEST_ION_EXEC_DL_CODE,
2691 0x40, 0x4000, 0x0001, NULL, 0, 3000);
2692
2693 release_firmware(fw);
2694}
2695
2696
2697/****************************************************************************
2698 * edge_startup
2699 ****************************************************************************/
2700static int edge_startup(struct usb_serial *serial)
2701{
2702 struct edgeport_serial *edge_serial;
2703 struct usb_device *dev;
2704 struct device *ddev = &serial->dev->dev;
2705 int i;
2706 int response;
2707 bool interrupt_in_found;
2708 bool bulk_in_found;
2709 bool bulk_out_found;
2710 static const __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0,
2711 EDGE_COMPATIBILITY_MASK1,
2712 EDGE_COMPATIBILITY_MASK2 };
2713
2714 dev = serial->dev;
2715
2716 /* create our private serial structure */
2717 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2718 if (!edge_serial)
2719 return -ENOMEM;
2720
2721 spin_lock_init(&edge_serial->es_lock);
2722 edge_serial->serial = serial;
2723 usb_set_serial_data(serial, edge_serial);
2724
2725 /* get the name for the device from the device */
2726 i = usb_string(dev, dev->descriptor.iManufacturer,
2727 &edge_serial->name[0], MAX_NAME_LEN+1);
2728 if (i < 0)
2729 i = 0;
2730 edge_serial->name[i++] = ' ';
2731 usb_string(dev, dev->descriptor.iProduct,
2732 &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2733
2734 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2735
2736 /* Read the epic descriptor */
2737 if (get_epic_descriptor(edge_serial) < 0) {
2738 /* memcpy descriptor to Supports structures */
2739 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2740 sizeof(struct edge_compatibility_bits));
2741
2742 /* get the manufacturing descriptor for this device */
2743 get_manufacturing_desc(edge_serial);
2744
2745 /* get the boot descriptor */
2746 get_boot_desc(edge_serial);
2747
2748 get_product_info(edge_serial);
2749 }
2750
2751 /* set the number of ports from the manufacturing description */
2752 /* serial->num_ports = serial->product_info.NumPorts; */
2753 if ((!edge_serial->is_epic) &&
2754 (edge_serial->product_info.NumPorts != serial->num_ports)) {
2755 dev_warn(ddev,
2756 "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2757 edge_serial->product_info.NumPorts,
2758 serial->num_ports);
2759 }
2760
2761 dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2762
2763 /* If not an EPiC device */
2764 if (!edge_serial->is_epic) {
2765 /* now load the application firmware into this device */
2766 load_application_firmware(edge_serial);
2767
2768 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2769
2770 /* Check current Edgeport EEPROM and update if necessary */
2771 update_edgeport_E2PROM(edge_serial);
2772
2773 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2774
2775 /* set the configuration to use #1 */
2776/* dev_dbg(ddev, "set_configuration 1\n"); */
2777/* usb_set_configuration (dev, 1); */
2778 }
2779 dev_dbg(ddev, " FirmwareMajorVersion %d.%d.%d\n",
2780 edge_serial->product_info.FirmwareMajorVersion,
2781 edge_serial->product_info.FirmwareMinorVersion,
2782 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2783
2784 /* we set up the pointers to the endpoints in the edge_open function,
2785 * as the structures aren't created yet. */
2786
2787 response = 0;
2788
2789 if (edge_serial->is_epic) {
2790 struct usb_host_interface *alt;
2791
2792 alt = serial->interface->cur_altsetting;
2793
2794 /* EPIC thing, set up our interrupt polling now and our read
2795 * urb, so that the device knows it really is connected. */
2796 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2797 for (i = 0; i < alt->desc.bNumEndpoints; ++i) {
2798 struct usb_endpoint_descriptor *endpoint;
2799 int buffer_size;
2800
2801 endpoint = &alt->endpoint[i].desc;
2802 buffer_size = usb_endpoint_maxp(endpoint);
2803 if (!interrupt_in_found &&
2804 (usb_endpoint_is_int_in(endpoint))) {
2805 /* we found a interrupt in endpoint */
2806 dev_dbg(ddev, "found interrupt in\n");
2807
2808 /* not set up yet, so do it now */
2809 edge_serial->interrupt_read_urb =
2810 usb_alloc_urb(0, GFP_KERNEL);
2811 if (!edge_serial->interrupt_read_urb) {
2812 response = -ENOMEM;
2813 break;
2814 }
2815
2816 edge_serial->interrupt_in_buffer =
2817 kmalloc(buffer_size, GFP_KERNEL);
2818 if (!edge_serial->interrupt_in_buffer) {
2819 response = -ENOMEM;
2820 break;
2821 }
2822 edge_serial->interrupt_in_endpoint =
2823 endpoint->bEndpointAddress;
2824
2825 /* set up our interrupt urb */
2826 usb_fill_int_urb(
2827 edge_serial->interrupt_read_urb,
2828 dev,
2829 usb_rcvintpipe(dev,
2830 endpoint->bEndpointAddress),
2831 edge_serial->interrupt_in_buffer,
2832 buffer_size,
2833 edge_interrupt_callback,
2834 edge_serial,
2835 endpoint->bInterval);
2836
2837 interrupt_in_found = true;
2838 }
2839
2840 if (!bulk_in_found &&
2841 (usb_endpoint_is_bulk_in(endpoint))) {
2842 /* we found a bulk in endpoint */
2843 dev_dbg(ddev, "found bulk in\n");
2844
2845 /* not set up yet, so do it now */
2846 edge_serial->read_urb =
2847 usb_alloc_urb(0, GFP_KERNEL);
2848 if (!edge_serial->read_urb) {
2849 response = -ENOMEM;
2850 break;
2851 }
2852
2853 edge_serial->bulk_in_buffer =
2854 kmalloc(buffer_size, GFP_KERNEL);
2855 if (!edge_serial->bulk_in_buffer) {
2856 response = -ENOMEM;
2857 break;
2858 }
2859 edge_serial->bulk_in_endpoint =
2860 endpoint->bEndpointAddress;
2861
2862 /* set up our bulk in urb */
2863 usb_fill_bulk_urb(edge_serial->read_urb, dev,
2864 usb_rcvbulkpipe(dev,
2865 endpoint->bEndpointAddress),
2866 edge_serial->bulk_in_buffer,
2867 usb_endpoint_maxp(endpoint),
2868 edge_bulk_in_callback,
2869 edge_serial);
2870 bulk_in_found = true;
2871 }
2872
2873 if (!bulk_out_found &&
2874 (usb_endpoint_is_bulk_out(endpoint))) {
2875 /* we found a bulk out endpoint */
2876 dev_dbg(ddev, "found bulk out\n");
2877 edge_serial->bulk_out_endpoint =
2878 endpoint->bEndpointAddress;
2879 bulk_out_found = true;
2880 }
2881 }
2882
2883 if (response || !interrupt_in_found || !bulk_in_found ||
2884 !bulk_out_found) {
2885 if (!response) {
2886 dev_err(ddev, "expected endpoints not found\n");
2887 response = -ENODEV;
2888 }
2889
2890 goto error;
2891 }
2892
2893 /* start interrupt read for this edgeport this interrupt will
2894 * continue as long as the edgeport is connected */
2895 response = usb_submit_urb(edge_serial->interrupt_read_urb,
2896 GFP_KERNEL);
2897 if (response) {
2898 dev_err(ddev, "%s - Error %d submitting control urb\n",
2899 __func__, response);
2900
2901 goto error;
2902 }
2903 }
2904 return response;
2905
2906error:
2907 usb_free_urb(edge_serial->interrupt_read_urb);
2908 kfree(edge_serial->interrupt_in_buffer);
2909
2910 usb_free_urb(edge_serial->read_urb);
2911 kfree(edge_serial->bulk_in_buffer);
2912
2913 kfree(edge_serial);
2914
2915 return response;
2916}
2917
2918
2919/****************************************************************************
2920 * edge_disconnect
2921 * This function is called whenever the device is removed from the usb bus.
2922 ****************************************************************************/
2923static void edge_disconnect(struct usb_serial *serial)
2924{
2925 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2926
2927 if (edge_serial->is_epic) {
2928 usb_kill_urb(edge_serial->interrupt_read_urb);
2929 usb_kill_urb(edge_serial->read_urb);
2930 }
2931}
2932
2933
2934/****************************************************************************
2935 * edge_release
2936 * This function is called when the device structure is deallocated.
2937 ****************************************************************************/
2938static void edge_release(struct usb_serial *serial)
2939{
2940 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2941
2942 if (edge_serial->is_epic) {
2943 usb_kill_urb(edge_serial->interrupt_read_urb);
2944 usb_free_urb(edge_serial->interrupt_read_urb);
2945 kfree(edge_serial->interrupt_in_buffer);
2946
2947 usb_kill_urb(edge_serial->read_urb);
2948 usb_free_urb(edge_serial->read_urb);
2949 kfree(edge_serial->bulk_in_buffer);
2950 }
2951
2952 kfree(edge_serial);
2953}
2954
2955static int edge_port_probe(struct usb_serial_port *port)
2956{
2957 struct edgeport_port *edge_port;
2958
2959 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2960 if (!edge_port)
2961 return -ENOMEM;
2962
2963 spin_lock_init(&edge_port->ep_lock);
2964 edge_port->port = port;
2965
2966 usb_set_serial_port_data(port, edge_port);
2967
2968 return 0;
2969}
2970
2971static void edge_port_remove(struct usb_serial_port *port)
2972{
2973 struct edgeport_port *edge_port;
2974
2975 edge_port = usb_get_serial_port_data(port);
2976 kfree(edge_port);
2977}
2978
2979static struct usb_serial_driver edgeport_2port_device = {
2980 .driver = {
2981 .owner = THIS_MODULE,
2982 .name = "edgeport_2",
2983 },
2984 .description = "Edgeport 2 port adapter",
2985 .id_table = edgeport_2port_id_table,
2986 .num_ports = 2,
2987 .num_bulk_in = 1,
2988 .num_bulk_out = 1,
2989 .num_interrupt_in = 1,
2990 .open = edge_open,
2991 .close = edge_close,
2992 .throttle = edge_throttle,
2993 .unthrottle = edge_unthrottle,
2994 .attach = edge_startup,
2995 .disconnect = edge_disconnect,
2996 .release = edge_release,
2997 .port_probe = edge_port_probe,
2998 .port_remove = edge_port_remove,
2999 .ioctl = edge_ioctl,
3000 .set_termios = edge_set_termios,
3001 .tiocmget = edge_tiocmget,
3002 .tiocmset = edge_tiocmset,
3003 .tiocmiwait = usb_serial_generic_tiocmiwait,
3004 .get_icount = usb_serial_generic_get_icount,
3005 .write = edge_write,
3006 .write_room = edge_write_room,
3007 .chars_in_buffer = edge_chars_in_buffer,
3008 .break_ctl = edge_break,
3009 .read_int_callback = edge_interrupt_callback,
3010 .read_bulk_callback = edge_bulk_in_callback,
3011 .write_bulk_callback = edge_bulk_out_data_callback,
3012};
3013
3014static struct usb_serial_driver edgeport_4port_device = {
3015 .driver = {
3016 .owner = THIS_MODULE,
3017 .name = "edgeport_4",
3018 },
3019 .description = "Edgeport 4 port adapter",
3020 .id_table = edgeport_4port_id_table,
3021 .num_ports = 4,
3022 .num_bulk_in = 1,
3023 .num_bulk_out = 1,
3024 .num_interrupt_in = 1,
3025 .open = edge_open,
3026 .close = edge_close,
3027 .throttle = edge_throttle,
3028 .unthrottle = edge_unthrottle,
3029 .attach = edge_startup,
3030 .disconnect = edge_disconnect,
3031 .release = edge_release,
3032 .port_probe = edge_port_probe,
3033 .port_remove = edge_port_remove,
3034 .ioctl = edge_ioctl,
3035 .set_termios = edge_set_termios,
3036 .tiocmget = edge_tiocmget,
3037 .tiocmset = edge_tiocmset,
3038 .tiocmiwait = usb_serial_generic_tiocmiwait,
3039 .get_icount = usb_serial_generic_get_icount,
3040 .write = edge_write,
3041 .write_room = edge_write_room,
3042 .chars_in_buffer = edge_chars_in_buffer,
3043 .break_ctl = edge_break,
3044 .read_int_callback = edge_interrupt_callback,
3045 .read_bulk_callback = edge_bulk_in_callback,
3046 .write_bulk_callback = edge_bulk_out_data_callback,
3047};
3048
3049static struct usb_serial_driver edgeport_8port_device = {
3050 .driver = {
3051 .owner = THIS_MODULE,
3052 .name = "edgeport_8",
3053 },
3054 .description = "Edgeport 8 port adapter",
3055 .id_table = edgeport_8port_id_table,
3056 .num_ports = 8,
3057 .num_bulk_in = 1,
3058 .num_bulk_out = 1,
3059 .num_interrupt_in = 1,
3060 .open = edge_open,
3061 .close = edge_close,
3062 .throttle = edge_throttle,
3063 .unthrottle = edge_unthrottle,
3064 .attach = edge_startup,
3065 .disconnect = edge_disconnect,
3066 .release = edge_release,
3067 .port_probe = edge_port_probe,
3068 .port_remove = edge_port_remove,
3069 .ioctl = edge_ioctl,
3070 .set_termios = edge_set_termios,
3071 .tiocmget = edge_tiocmget,
3072 .tiocmset = edge_tiocmset,
3073 .tiocmiwait = usb_serial_generic_tiocmiwait,
3074 .get_icount = usb_serial_generic_get_icount,
3075 .write = edge_write,
3076 .write_room = edge_write_room,
3077 .chars_in_buffer = edge_chars_in_buffer,
3078 .break_ctl = edge_break,
3079 .read_int_callback = edge_interrupt_callback,
3080 .read_bulk_callback = edge_bulk_in_callback,
3081 .write_bulk_callback = edge_bulk_out_data_callback,
3082};
3083
3084static struct usb_serial_driver epic_device = {
3085 .driver = {
3086 .owner = THIS_MODULE,
3087 .name = "epic",
3088 },
3089 .description = "EPiC device",
3090 .id_table = Epic_port_id_table,
3091 .num_ports = 1,
3092 .num_bulk_in = 1,
3093 .num_bulk_out = 1,
3094 .num_interrupt_in = 1,
3095 .open = edge_open,
3096 .close = edge_close,
3097 .throttle = edge_throttle,
3098 .unthrottle = edge_unthrottle,
3099 .attach = edge_startup,
3100 .disconnect = edge_disconnect,
3101 .release = edge_release,
3102 .port_probe = edge_port_probe,
3103 .port_remove = edge_port_remove,
3104 .ioctl = edge_ioctl,
3105 .set_termios = edge_set_termios,
3106 .tiocmget = edge_tiocmget,
3107 .tiocmset = edge_tiocmset,
3108 .tiocmiwait = usb_serial_generic_tiocmiwait,
3109 .get_icount = usb_serial_generic_get_icount,
3110 .write = edge_write,
3111 .write_room = edge_write_room,
3112 .chars_in_buffer = edge_chars_in_buffer,
3113 .break_ctl = edge_break,
3114 .read_int_callback = edge_interrupt_callback,
3115 .read_bulk_callback = edge_bulk_in_callback,
3116 .write_bulk_callback = edge_bulk_out_data_callback,
3117};
3118
3119static struct usb_serial_driver * const serial_drivers[] = {
3120 &edgeport_2port_device, &edgeport_4port_device,
3121 &edgeport_8port_device, &epic_device, NULL
3122};
3123
3124module_usb_serial_driver(serial_drivers, id_table_combined);
3125
3126MODULE_AUTHOR(DRIVER_AUTHOR);
3127MODULE_DESCRIPTION(DRIVER_DESC);
3128MODULE_LICENSE("GPL");
3129MODULE_FIRMWARE("edgeport/boot.fw");
3130MODULE_FIRMWARE("edgeport/boot2.fw");
3131MODULE_FIRMWARE("edgeport/down.fw");
3132MODULE_FIRMWARE("edgeport/down2.fw");
1/*
2 * Edgeport USB Serial Converter driver
3 *
4 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * Supports the following devices:
13 * Edgeport/4
14 * Edgeport/4t
15 * Edgeport/2
16 * Edgeport/4i
17 * Edgeport/2i
18 * Edgeport/421
19 * Edgeport/21
20 * Rapidport/4
21 * Edgeport/8
22 * Edgeport/2D8
23 * Edgeport/4D8
24 * Edgeport/8i
25 *
26 * For questions or problems with this driver, contact Inside Out
27 * Networks technical support, or Peter Berger <pberger@brimson.com>,
28 * or Al Borchers <alborchers@steinerpoint.com>.
29 *
30 */
31
32#include <linux/kernel.h>
33#include <linux/jiffies.h>
34#include <linux/errno.h>
35#include <linux/init.h>
36#include <linux/slab.h>
37#include <linux/tty.h>
38#include <linux/tty_driver.h>
39#include <linux/tty_flip.h>
40#include <linux/module.h>
41#include <linux/spinlock.h>
42#include <linux/serial.h>
43#include <linux/ioctl.h>
44#include <linux/wait.h>
45#include <linux/firmware.h>
46#include <linux/ihex.h>
47#include <linux/uaccess.h>
48#include <linux/usb.h>
49#include <linux/usb/serial.h>
50#include "io_edgeport.h"
51#include "io_ionsp.h" /* info for the iosp messages */
52#include "io_16654.h" /* 16654 UART defines */
53
54/*
55 * Version Information
56 */
57#define DRIVER_VERSION "v2.7"
58#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
59#define DRIVER_DESC "Edgeport USB Serial Driver"
60
61#define MAX_NAME_LEN 64
62
63#define CHASE_TIMEOUT (5*HZ) /* 5 seconds */
64#define OPEN_TIMEOUT (5*HZ) /* 5 seconds */
65#define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */
66
67/* receive port state */
68enum RXSTATE {
69 EXPECT_HDR1 = 0, /* Expect header byte 1 */
70 EXPECT_HDR2 = 1, /* Expect header byte 2 */
71 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */
72 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */
73};
74
75
76/* Transmit Fifo
77 * This Transmit queue is an extension of the edgeport Rx buffer.
78 * The maximum amount of data buffered in both the edgeport
79 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
80 */
81struct TxFifo {
82 unsigned int head; /* index to head pointer (write) */
83 unsigned int tail; /* index to tail pointer (read) */
84 unsigned int count; /* Bytes in queue */
85 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */
86 unsigned char *fifo; /* allocated Buffer */
87};
88
89/* This structure holds all of the local port information */
90struct edgeport_port {
91 __u16 txCredits; /* our current credits for this port */
92 __u16 maxTxCredits; /* the max size of the port */
93
94 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */
95 struct urb *write_urb; /* write URB for this port */
96 bool write_in_progress; /* 'true' while a write URB is outstanding */
97 spinlock_t ep_lock;
98
99 __u8 shadowLCR; /* last LCR value received */
100 __u8 shadowMCR; /* last MCR value received */
101 __u8 shadowMSR; /* last MSR value received */
102 __u8 shadowLSR; /* last LSR value received */
103 __u8 shadowXonChar; /* last value set as XON char in Edgeport */
104 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */
105 __u8 validDataMask;
106 __u32 baudRate;
107
108 bool open;
109 bool openPending;
110 bool commandPending;
111 bool closePending;
112 bool chaseResponsePending;
113
114 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
115 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */
116 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */
117 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
118
119 struct async_icount icount;
120 struct usb_serial_port *port; /* loop back to the owner of this object */
121};
122
123
124/* This structure holds all of the individual device information */
125struct edgeport_serial {
126 char name[MAX_NAME_LEN+2]; /* string name of this device */
127
128 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */
129 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */
130 struct edgeport_product_info product_info; /* Product Info */
131 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */
132 int is_epic; /* flag if EPiC device or not */
133
134 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */
135 unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */
136 struct urb *interrupt_read_urb; /* our interrupt urb */
137
138 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */
139 unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */
140 struct urb *read_urb; /* our bulk read urb */
141 bool read_in_progress;
142 spinlock_t es_lock;
143
144 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */
145
146 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */
147
148 enum RXSTATE rxState; /* the current state of the bulk receive processor */
149 __u8 rxHeader1; /* receive header byte 1 */
150 __u8 rxHeader2; /* receive header byte 2 */
151 __u8 rxHeader3; /* receive header byte 3 */
152 __u8 rxPort; /* the port that we are currently receiving data for */
153 __u8 rxStatusCode; /* the receive status code */
154 __u8 rxStatusParam; /* the receive status paramater */
155 __s16 rxBytesRemaining; /* the number of port bytes left to read */
156 struct usb_serial *serial; /* loop back to the owner of this object */
157};
158
159/* baud rate information */
160struct divisor_table_entry {
161 __u32 BaudRate;
162 __u16 Divisor;
163};
164
165/*
166 * Define table of divisors for Rev A EdgePort/4 hardware
167 * These assume a 3.6864MHz crystal, the standard /16, and
168 * MCR.7 = 0.
169 */
170
171static const struct divisor_table_entry divisor_table[] = {
172 { 50, 4608},
173 { 75, 3072},
174 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */
175 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */
176 { 150, 1536},
177 { 300, 768},
178 { 600, 384},
179 { 1200, 192},
180 { 1800, 128},
181 { 2400, 96},
182 { 4800, 48},
183 { 7200, 32},
184 { 9600, 24},
185 { 14400, 16},
186 { 19200, 12},
187 { 38400, 6},
188 { 57600, 4},
189 { 115200, 2},
190 { 230400, 1},
191};
192
193/* local variables */
194static bool debug;
195
196/* Number of outstanding Command Write Urbs */
197static atomic_t CmdUrbs = ATOMIC_INIT(0);
198
199
200/* local function prototypes */
201
202/* function prototypes for all URB callbacks */
203static void edge_interrupt_callback(struct urb *urb);
204static void edge_bulk_in_callback(struct urb *urb);
205static void edge_bulk_out_data_callback(struct urb *urb);
206static void edge_bulk_out_cmd_callback(struct urb *urb);
207
208/* function prototypes for the usbserial callbacks */
209static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
210static void edge_close(struct usb_serial_port *port);
211static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
212 const unsigned char *buf, int count);
213static int edge_write_room(struct tty_struct *tty);
214static int edge_chars_in_buffer(struct tty_struct *tty);
215static void edge_throttle(struct tty_struct *tty);
216static void edge_unthrottle(struct tty_struct *tty);
217static void edge_set_termios(struct tty_struct *tty,
218 struct usb_serial_port *port,
219 struct ktermios *old_termios);
220static int edge_ioctl(struct tty_struct *tty,
221 unsigned int cmd, unsigned long arg);
222static void edge_break(struct tty_struct *tty, int break_state);
223static int edge_tiocmget(struct tty_struct *tty);
224static int edge_tiocmset(struct tty_struct *tty,
225 unsigned int set, unsigned int clear);
226static int edge_get_icount(struct tty_struct *tty,
227 struct serial_icounter_struct *icount);
228static int edge_startup(struct usb_serial *serial);
229static void edge_disconnect(struct usb_serial *serial);
230static void edge_release(struct usb_serial *serial);
231
232#include "io_tables.h" /* all of the devices that this driver supports */
233
234/* function prototypes for all of our local functions */
235
236static void process_rcvd_data(struct edgeport_serial *edge_serial,
237 unsigned char *buffer, __u16 bufferLength);
238static void process_rcvd_status(struct edgeport_serial *edge_serial,
239 __u8 byte2, __u8 byte3);
240static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
241 unsigned char *data, int length);
242static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
243static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
244 __u8 lsr, __u8 data);
245static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
246 __u8 param);
247static int calc_baud_rate_divisor(int baud_rate, int *divisor);
248static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
249 int baudRate);
250static void change_port_settings(struct tty_struct *tty,
251 struct edgeport_port *edge_port,
252 struct ktermios *old_termios);
253static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
254 __u8 regNum, __u8 regValue);
255static int write_cmd_usb(struct edgeport_port *edge_port,
256 unsigned char *buffer, int writeLength);
257static void send_more_port_data(struct edgeport_serial *edge_serial,
258 struct edgeport_port *edge_port);
259
260static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
261 __u16 length, const __u8 *data);
262static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
263 __u16 length, __u8 *data);
264static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
265 __u16 length, const __u8 *data);
266static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
267static void get_boot_desc(struct edgeport_serial *edge_serial);
268static void load_application_firmware(struct edgeport_serial *edge_serial);
269
270static void unicode_to_ascii(char *string, int buflen,
271 __le16 *unicode, int unicode_size);
272
273
274/* ************************************************************************ */
275/* ************************************************************************ */
276/* ************************************************************************ */
277/* ************************************************************************ */
278
279/************************************************************************
280 * *
281 * update_edgeport_E2PROM() Compare current versions of *
282 * Boot ROM and Manufacture *
283 * Descriptors with versions *
284 * embedded in this driver *
285 * *
286 ************************************************************************/
287static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
288{
289 __u32 BootCurVer;
290 __u32 BootNewVer;
291 __u8 BootMajorVersion;
292 __u8 BootMinorVersion;
293 __u16 BootBuildNumber;
294 __u32 Bootaddr;
295 const struct ihex_binrec *rec;
296 const struct firmware *fw;
297 const char *fw_name;
298 int response;
299
300 switch (edge_serial->product_info.iDownloadFile) {
301 case EDGE_DOWNLOAD_FILE_I930:
302 fw_name = "edgeport/boot.fw";
303 break;
304 case EDGE_DOWNLOAD_FILE_80251:
305 fw_name = "edgeport/boot2.fw";
306 break;
307 default:
308 return;
309 }
310
311 response = request_ihex_firmware(&fw, fw_name,
312 &edge_serial->serial->dev->dev);
313 if (response) {
314 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
315 fw_name, response);
316 return;
317 }
318
319 rec = (const struct ihex_binrec *)fw->data;
320 BootMajorVersion = rec->data[0];
321 BootMinorVersion = rec->data[1];
322 BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
323
324 /* Check Boot Image Version */
325 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
326 (edge_serial->boot_descriptor.MinorVersion << 16) +
327 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
328
329 BootNewVer = (BootMajorVersion << 24) +
330 (BootMinorVersion << 16) +
331 BootBuildNumber;
332
333 dbg("Current Boot Image version %d.%d.%d",
334 edge_serial->boot_descriptor.MajorVersion,
335 edge_serial->boot_descriptor.MinorVersion,
336 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
337
338
339 if (BootNewVer > BootCurVer) {
340 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
341 edge_serial->boot_descriptor.MajorVersion,
342 edge_serial->boot_descriptor.MinorVersion,
343 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
344 BootMajorVersion, BootMinorVersion, BootBuildNumber);
345
346 dbg("Downloading new Boot Image");
347
348 for (rec = ihex_next_binrec(rec); rec;
349 rec = ihex_next_binrec(rec)) {
350 Bootaddr = be32_to_cpu(rec->addr);
351 response = rom_write(edge_serial->serial,
352 Bootaddr >> 16,
353 Bootaddr & 0xFFFF,
354 be16_to_cpu(rec->len),
355 &rec->data[0]);
356 if (response < 0) {
357 dev_err(&edge_serial->serial->dev->dev,
358 "rom_write failed (%x, %x, %d)\n",
359 Bootaddr >> 16, Bootaddr & 0xFFFF,
360 be16_to_cpu(rec->len));
361 break;
362 }
363 }
364 } else {
365 dbg("Boot Image -- already up to date");
366 }
367 release_firmware(fw);
368}
369
370#if 0
371/************************************************************************
372 *
373 * Get string descriptor from device
374 *
375 ************************************************************************/
376static int get_string_desc(struct usb_device *dev, int Id,
377 struct usb_string_descriptor **pRetDesc)
378{
379 struct usb_string_descriptor StringDesc;
380 struct usb_string_descriptor *pStringDesc;
381
382 dbg("%s - USB String ID = %d", __func__, Id);
383
384 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
385 sizeof(StringDesc)))
386 return 0;
387
388 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
389 if (!pStringDesc)
390 return -1;
391
392 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
393 StringDesc.bLength)) {
394 kfree(pStringDesc);
395 return -1;
396 }
397
398 *pRetDesc = pStringDesc;
399 return 0;
400}
401#endif
402
403static void dump_product_info(struct edgeport_product_info *product_info)
404{
405 /* Dump Product Info structure */
406 dbg("**Product Information:");
407 dbg(" ProductId %x", product_info->ProductId);
408 dbg(" NumPorts %d", product_info->NumPorts);
409 dbg(" ProdInfoVer %d", product_info->ProdInfoVer);
410 dbg(" IsServer %d", product_info->IsServer);
411 dbg(" IsRS232 %d", product_info->IsRS232);
412 dbg(" IsRS422 %d", product_info->IsRS422);
413 dbg(" IsRS485 %d", product_info->IsRS485);
414 dbg(" RomSize %d", product_info->RomSize);
415 dbg(" RamSize %d", product_info->RamSize);
416 dbg(" CpuRev %x", product_info->CpuRev);
417 dbg(" BoardRev %x", product_info->BoardRev);
418 dbg(" BootMajorVersion %d.%d.%d", product_info->BootMajorVersion,
419 product_info->BootMinorVersion,
420 le16_to_cpu(product_info->BootBuildNumber));
421 dbg(" FirmwareMajorVersion %d.%d.%d",
422 product_info->FirmwareMajorVersion,
423 product_info->FirmwareMinorVersion,
424 le16_to_cpu(product_info->FirmwareBuildNumber));
425 dbg(" ManufactureDescDate %d/%d/%d",
426 product_info->ManufactureDescDate[0],
427 product_info->ManufactureDescDate[1],
428 product_info->ManufactureDescDate[2]+1900);
429 dbg(" iDownloadFile 0x%x", product_info->iDownloadFile);
430 dbg(" EpicVer %d", product_info->EpicVer);
431}
432
433static void get_product_info(struct edgeport_serial *edge_serial)
434{
435 struct edgeport_product_info *product_info = &edge_serial->product_info;
436
437 memset(product_info, 0, sizeof(struct edgeport_product_info));
438
439 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
440 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
441 product_info->ProdInfoVer = 0;
442
443 product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
444 product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
445 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
446 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
447
448 product_info->BootMajorVersion =
449 edge_serial->boot_descriptor.MajorVersion;
450 product_info->BootMinorVersion =
451 edge_serial->boot_descriptor.MinorVersion;
452 product_info->BootBuildNumber =
453 edge_serial->boot_descriptor.BuildNumber;
454
455 memcpy(product_info->ManufactureDescDate,
456 edge_serial->manuf_descriptor.DescDate,
457 sizeof(edge_serial->manuf_descriptor.DescDate));
458
459 /* check if this is 2nd generation hardware */
460 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
461 & ION_DEVICE_ID_80251_NETCHIP)
462 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
463 else
464 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
465
466 /* Determine Product type and set appropriate flags */
467 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
468 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
469 case ION_DEVICE_ID_EDGEPORT_4T:
470 case ION_DEVICE_ID_EDGEPORT_4:
471 case ION_DEVICE_ID_EDGEPORT_2:
472 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
473 case ION_DEVICE_ID_EDGEPORT_8:
474 case ION_DEVICE_ID_EDGEPORT_421:
475 case ION_DEVICE_ID_EDGEPORT_21:
476 case ION_DEVICE_ID_EDGEPORT_2_DIN:
477 case ION_DEVICE_ID_EDGEPORT_4_DIN:
478 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
479 product_info->IsRS232 = 1;
480 break;
481
482 case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
483 product_info->IsRS422 = 1;
484 product_info->IsRS485 = 1;
485 break;
486
487 case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
488 case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
489 product_info->IsRS422 = 1;
490 break;
491 }
492
493 dump_product_info(product_info);
494}
495
496static int get_epic_descriptor(struct edgeport_serial *ep)
497{
498 int result;
499 struct usb_serial *serial = ep->serial;
500 struct edgeport_product_info *product_info = &ep->product_info;
501 struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
502 struct edge_compatibility_bits *bits;
503
504 ep->is_epic = 0;
505 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
506 USB_REQUEST_ION_GET_EPIC_DESC,
507 0xC0, 0x00, 0x00,
508 &ep->epic_descriptor,
509 sizeof(struct edge_compatibility_descriptor),
510 300);
511
512 dbg("%s result = %d", __func__, result);
513
514 if (result > 0) {
515 ep->is_epic = 1;
516 memset(product_info, 0, sizeof(struct edgeport_product_info));
517
518 product_info->NumPorts = epic->NumPorts;
519 product_info->ProdInfoVer = 0;
520 product_info->FirmwareMajorVersion = epic->MajorVersion;
521 product_info->FirmwareMinorVersion = epic->MinorVersion;
522 product_info->FirmwareBuildNumber = epic->BuildNumber;
523 product_info->iDownloadFile = epic->iDownloadFile;
524 product_info->EpicVer = epic->EpicVer;
525 product_info->Epic = epic->Supports;
526 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
527 dump_product_info(product_info);
528
529 bits = &ep->epic_descriptor.Supports;
530 dbg("**EPIC descriptor:");
531 dbg(" VendEnableSuspend: %s", bits->VendEnableSuspend ? "TRUE": "FALSE");
532 dbg(" IOSPOpen : %s", bits->IOSPOpen ? "TRUE": "FALSE");
533 dbg(" IOSPClose : %s", bits->IOSPClose ? "TRUE": "FALSE");
534 dbg(" IOSPChase : %s", bits->IOSPChase ? "TRUE": "FALSE");
535 dbg(" IOSPSetRxFlow : %s", bits->IOSPSetRxFlow ? "TRUE": "FALSE");
536 dbg(" IOSPSetTxFlow : %s", bits->IOSPSetTxFlow ? "TRUE": "FALSE");
537 dbg(" IOSPSetXChar : %s", bits->IOSPSetXChar ? "TRUE": "FALSE");
538 dbg(" IOSPRxCheck : %s", bits->IOSPRxCheck ? "TRUE": "FALSE");
539 dbg(" IOSPSetClrBreak : %s", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
540 dbg(" IOSPWriteMCR : %s", bits->IOSPWriteMCR ? "TRUE": "FALSE");
541 dbg(" IOSPWriteLCR : %s", bits->IOSPWriteLCR ? "TRUE": "FALSE");
542 dbg(" IOSPSetBaudRate : %s", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
543 dbg(" TrueEdgeport : %s", bits->TrueEdgeport ? "TRUE": "FALSE");
544 }
545
546 return result;
547}
548
549
550/************************************************************************/
551/************************************************************************/
552/* U S B C A L L B A C K F U N C T I O N S */
553/* U S B C A L L B A C K F U N C T I O N S */
554/************************************************************************/
555/************************************************************************/
556
557/*****************************************************************************
558 * edge_interrupt_callback
559 * this is the callback function for when we have received data on the
560 * interrupt endpoint.
561 *****************************************************************************/
562static void edge_interrupt_callback(struct urb *urb)
563{
564 struct edgeport_serial *edge_serial = urb->context;
565 struct edgeport_port *edge_port;
566 struct usb_serial_port *port;
567 struct tty_struct *tty;
568 unsigned char *data = urb->transfer_buffer;
569 int length = urb->actual_length;
570 int bytes_avail;
571 int position;
572 int txCredits;
573 int portNumber;
574 int result;
575 int status = urb->status;
576
577 dbg("%s", __func__);
578
579 switch (status) {
580 case 0:
581 /* success */
582 break;
583 case -ECONNRESET:
584 case -ENOENT:
585 case -ESHUTDOWN:
586 /* this urb is terminated, clean up */
587 dbg("%s - urb shutting down with status: %d",
588 __func__, status);
589 return;
590 default:
591 dbg("%s - nonzero urb status received: %d", __func__, status);
592 goto exit;
593 }
594
595 /* process this interrupt-read even if there are no ports open */
596 if (length) {
597 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
598 __func__, length, data);
599
600 if (length > 1) {
601 bytes_avail = data[0] | (data[1] << 8);
602 if (bytes_avail) {
603 spin_lock(&edge_serial->es_lock);
604 edge_serial->rxBytesAvail += bytes_avail;
605 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __func__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress);
606
607 if (edge_serial->rxBytesAvail > 0 &&
608 !edge_serial->read_in_progress) {
609 dbg("%s - posting a read", __func__);
610 edge_serial->read_in_progress = true;
611
612 /* we have pending bytes on the
613 bulk in pipe, send a request */
614 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
615 if (result) {
616 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __func__, result);
617 edge_serial->read_in_progress = false;
618 }
619 }
620 spin_unlock(&edge_serial->es_lock);
621 }
622 }
623 /* grab the txcredits for the ports if available */
624 position = 2;
625 portNumber = 0;
626 while ((position < length) &&
627 (portNumber < edge_serial->serial->num_ports)) {
628 txCredits = data[position] | (data[position+1] << 8);
629 if (txCredits) {
630 port = edge_serial->serial->port[portNumber];
631 edge_port = usb_get_serial_port_data(port);
632 if (edge_port->open) {
633 spin_lock(&edge_port->ep_lock);
634 edge_port->txCredits += txCredits;
635 spin_unlock(&edge_port->ep_lock);
636 dbg("%s - txcredits for port%d = %d",
637 __func__, portNumber,
638 edge_port->txCredits);
639
640 /* tell the tty driver that something
641 has changed */
642 tty = tty_port_tty_get(
643 &edge_port->port->port);
644 if (tty) {
645 tty_wakeup(tty);
646 tty_kref_put(tty);
647 }
648 /* Since we have more credit, check
649 if more data can be sent */
650 send_more_port_data(edge_serial,
651 edge_port);
652 }
653 }
654 position += 2;
655 ++portNumber;
656 }
657 }
658
659exit:
660 result = usb_submit_urb(urb, GFP_ATOMIC);
661 if (result)
662 dev_err(&urb->dev->dev,
663 "%s - Error %d submitting control urb\n",
664 __func__, result);
665}
666
667
668/*****************************************************************************
669 * edge_bulk_in_callback
670 * this is the callback function for when we have received data on the
671 * bulk in endpoint.
672 *****************************************************************************/
673static void edge_bulk_in_callback(struct urb *urb)
674{
675 struct edgeport_serial *edge_serial = urb->context;
676 unsigned char *data = urb->transfer_buffer;
677 int retval;
678 __u16 raw_data_length;
679 int status = urb->status;
680
681 dbg("%s", __func__);
682
683 if (status) {
684 dbg("%s - nonzero read bulk status received: %d",
685 __func__, status);
686 edge_serial->read_in_progress = false;
687 return;
688 }
689
690 if (urb->actual_length == 0) {
691 dbg("%s - read bulk callback with no data", __func__);
692 edge_serial->read_in_progress = false;
693 return;
694 }
695
696 raw_data_length = urb->actual_length;
697
698 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
699 __func__, raw_data_length, data);
700
701 spin_lock(&edge_serial->es_lock);
702
703 /* decrement our rxBytes available by the number that we just got */
704 edge_serial->rxBytesAvail -= raw_data_length;
705
706 dbg("%s - Received = %d, rxBytesAvail %d", __func__,
707 raw_data_length, edge_serial->rxBytesAvail);
708
709 process_rcvd_data(edge_serial, data, urb->actual_length);
710
711 /* check to see if there's any more data for us to read */
712 if (edge_serial->rxBytesAvail > 0) {
713 dbg("%s - posting a read", __func__);
714 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
715 if (retval) {
716 dev_err(&urb->dev->dev,
717 "%s - usb_submit_urb(read bulk) failed, "
718 "retval = %d\n", __func__, retval);
719 edge_serial->read_in_progress = false;
720 }
721 } else {
722 edge_serial->read_in_progress = false;
723 }
724
725 spin_unlock(&edge_serial->es_lock);
726}
727
728
729/*****************************************************************************
730 * edge_bulk_out_data_callback
731 * this is the callback function for when we have finished sending
732 * serial data on the bulk out endpoint.
733 *****************************************************************************/
734static void edge_bulk_out_data_callback(struct urb *urb)
735{
736 struct edgeport_port *edge_port = urb->context;
737 struct tty_struct *tty;
738 int status = urb->status;
739
740 dbg("%s", __func__);
741
742 if (status) {
743 dbg("%s - nonzero write bulk status received: %d",
744 __func__, status);
745 }
746
747 tty = tty_port_tty_get(&edge_port->port->port);
748
749 if (tty && edge_port->open) {
750 /* let the tty driver wakeup if it has a special
751 write_wakeup function */
752 tty_wakeup(tty);
753 }
754 tty_kref_put(tty);
755
756 /* Release the Write URB */
757 edge_port->write_in_progress = false;
758
759 /* Check if more data needs to be sent */
760 send_more_port_data((struct edgeport_serial *)
761 (usb_get_serial_data(edge_port->port->serial)), edge_port);
762}
763
764
765/*****************************************************************************
766 * BulkOutCmdCallback
767 * this is the callback function for when we have finished sending a
768 * command on the bulk out endpoint.
769 *****************************************************************************/
770static void edge_bulk_out_cmd_callback(struct urb *urb)
771{
772 struct edgeport_port *edge_port = urb->context;
773 struct tty_struct *tty;
774 int status = urb->status;
775
776 dbg("%s", __func__);
777
778 atomic_dec(&CmdUrbs);
779 dbg("%s - FREE URB %p (outstanding %d)", __func__,
780 urb, atomic_read(&CmdUrbs));
781
782
783 /* clean up the transfer buffer */
784 kfree(urb->transfer_buffer);
785
786 /* Free the command urb */
787 usb_free_urb(urb);
788
789 if (status) {
790 dbg("%s - nonzero write bulk status received: %d",
791 __func__, status);
792 return;
793 }
794
795 /* Get pointer to tty */
796 tty = tty_port_tty_get(&edge_port->port->port);
797
798 /* tell the tty driver that something has changed */
799 if (tty && edge_port->open)
800 tty_wakeup(tty);
801 tty_kref_put(tty);
802
803 /* we have completed the command */
804 edge_port->commandPending = false;
805 wake_up(&edge_port->wait_command);
806}
807
808
809/*****************************************************************************
810 * Driver tty interface functions
811 *****************************************************************************/
812
813/*****************************************************************************
814 * SerialOpen
815 * this function is called by the tty driver when a port is opened
816 * If successful, we return 0
817 * Otherwise we return a negative error number.
818 *****************************************************************************/
819static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
820{
821 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
822 struct usb_serial *serial;
823 struct edgeport_serial *edge_serial;
824 int response;
825
826 dbg("%s - port %d", __func__, port->number);
827
828 if (edge_port == NULL)
829 return -ENODEV;
830
831 /* see if we've set up our endpoint info yet (can't set it up
832 in edge_startup as the structures were not set up at that time.) */
833 serial = port->serial;
834 edge_serial = usb_get_serial_data(serial);
835 if (edge_serial == NULL)
836 return -ENODEV;
837 if (edge_serial->interrupt_in_buffer == NULL) {
838 struct usb_serial_port *port0 = serial->port[0];
839
840 /* not set up yet, so do it now */
841 edge_serial->interrupt_in_buffer =
842 port0->interrupt_in_buffer;
843 edge_serial->interrupt_in_endpoint =
844 port0->interrupt_in_endpointAddress;
845 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
846 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
847 edge_serial->bulk_in_endpoint =
848 port0->bulk_in_endpointAddress;
849 edge_serial->read_urb = port0->read_urb;
850 edge_serial->bulk_out_endpoint =
851 port0->bulk_out_endpointAddress;
852
853 /* set up our interrupt urb */
854 usb_fill_int_urb(edge_serial->interrupt_read_urb,
855 serial->dev,
856 usb_rcvintpipe(serial->dev,
857 port0->interrupt_in_endpointAddress),
858 port0->interrupt_in_buffer,
859 edge_serial->interrupt_read_urb->transfer_buffer_length,
860 edge_interrupt_callback, edge_serial,
861 edge_serial->interrupt_read_urb->interval);
862
863 /* set up our bulk in urb */
864 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
865 usb_rcvbulkpipe(serial->dev,
866 port0->bulk_in_endpointAddress),
867 port0->bulk_in_buffer,
868 edge_serial->read_urb->transfer_buffer_length,
869 edge_bulk_in_callback, edge_serial);
870 edge_serial->read_in_progress = false;
871
872 /* start interrupt read for this edgeport
873 * this interrupt will continue as long
874 * as the edgeport is connected */
875 response = usb_submit_urb(edge_serial->interrupt_read_urb,
876 GFP_KERNEL);
877 if (response) {
878 dev_err(&port->dev,
879 "%s - Error %d submitting control urb\n",
880 __func__, response);
881 }
882 }
883
884 /* initialize our wait queues */
885 init_waitqueue_head(&edge_port->wait_open);
886 init_waitqueue_head(&edge_port->wait_chase);
887 init_waitqueue_head(&edge_port->delta_msr_wait);
888 init_waitqueue_head(&edge_port->wait_command);
889
890 /* initialize our icount structure */
891 memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
892
893 /* initialize our port settings */
894 edge_port->txCredits = 0; /* Can't send any data yet */
895 /* Must always set this bit to enable ints! */
896 edge_port->shadowMCR = MCR_MASTER_IE;
897 edge_port->chaseResponsePending = false;
898
899 /* send a open port command */
900 edge_port->openPending = true;
901 edge_port->open = false;
902 response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
903
904 if (response < 0) {
905 dev_err(&port->dev, "%s - error sending open port command\n",
906 __func__);
907 edge_port->openPending = false;
908 return -ENODEV;
909 }
910
911 /* now wait for the port to be completely opened */
912 wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
913 OPEN_TIMEOUT);
914
915 if (!edge_port->open) {
916 /* open timed out */
917 dbg("%s - open timedout", __func__);
918 edge_port->openPending = false;
919 return -ENODEV;
920 }
921
922 /* create the txfifo */
923 edge_port->txfifo.head = 0;
924 edge_port->txfifo.tail = 0;
925 edge_port->txfifo.count = 0;
926 edge_port->txfifo.size = edge_port->maxTxCredits;
927 edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
928
929 if (!edge_port->txfifo.fifo) {
930 dbg("%s - no memory", __func__);
931 edge_close(port);
932 return -ENOMEM;
933 }
934
935 /* Allocate a URB for the write */
936 edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
937 edge_port->write_in_progress = false;
938
939 if (!edge_port->write_urb) {
940 dbg("%s - no memory", __func__);
941 edge_close(port);
942 return -ENOMEM;
943 }
944
945 dbg("%s(%d) - Initialize TX fifo to %d bytes",
946 __func__, port->number, edge_port->maxTxCredits);
947
948 dbg("%s exited", __func__);
949
950 return 0;
951}
952
953
954/************************************************************************
955 *
956 * block_until_chase_response
957 *
958 * This function will block the close until one of the following:
959 * 1. Response to our Chase comes from Edgeport
960 * 2. A timeout of 10 seconds without activity has expired
961 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
962 *
963 ************************************************************************/
964static void block_until_chase_response(struct edgeport_port *edge_port)
965{
966 DEFINE_WAIT(wait);
967 __u16 lastCredits;
968 int timeout = 1*HZ;
969 int loop = 10;
970
971 while (1) {
972 /* Save Last credits */
973 lastCredits = edge_port->txCredits;
974
975 /* Did we get our Chase response */
976 if (!edge_port->chaseResponsePending) {
977 dbg("%s - Got Chase Response", __func__);
978
979 /* did we get all of our credit back? */
980 if (edge_port->txCredits == edge_port->maxTxCredits) {
981 dbg("%s - Got all credits", __func__);
982 return;
983 }
984 }
985
986 /* Block the thread for a while */
987 prepare_to_wait(&edge_port->wait_chase, &wait,
988 TASK_UNINTERRUPTIBLE);
989 schedule_timeout(timeout);
990 finish_wait(&edge_port->wait_chase, &wait);
991
992 if (lastCredits == edge_port->txCredits) {
993 /* No activity.. count down. */
994 loop--;
995 if (loop == 0) {
996 edge_port->chaseResponsePending = false;
997 dbg("%s - Chase TIMEOUT", __func__);
998 return;
999 }
1000 } else {
1001 /* Reset timeout value back to 10 seconds */
1002 dbg("%s - Last %d, Current %d", __func__,
1003 lastCredits, edge_port->txCredits);
1004 loop = 10;
1005 }
1006 }
1007}
1008
1009
1010/************************************************************************
1011 *
1012 * block_until_tx_empty
1013 *
1014 * This function will block the close until one of the following:
1015 * 1. TX count are 0
1016 * 2. The edgeport has stopped
1017 * 3. A timeout of 3 seconds without activity has expired
1018 *
1019 ************************************************************************/
1020static void block_until_tx_empty(struct edgeport_port *edge_port)
1021{
1022 DEFINE_WAIT(wait);
1023 struct TxFifo *fifo = &edge_port->txfifo;
1024 __u32 lastCount;
1025 int timeout = HZ/10;
1026 int loop = 30;
1027
1028 while (1) {
1029 /* Save Last count */
1030 lastCount = fifo->count;
1031
1032 /* Is the Edgeport Buffer empty? */
1033 if (lastCount == 0) {
1034 dbg("%s - TX Buffer Empty", __func__);
1035 return;
1036 }
1037
1038 /* Block the thread for a while */
1039 prepare_to_wait(&edge_port->wait_chase, &wait,
1040 TASK_UNINTERRUPTIBLE);
1041 schedule_timeout(timeout);
1042 finish_wait(&edge_port->wait_chase, &wait);
1043
1044 dbg("%s wait", __func__);
1045
1046 if (lastCount == fifo->count) {
1047 /* No activity.. count down. */
1048 loop--;
1049 if (loop == 0) {
1050 dbg("%s - TIMEOUT", __func__);
1051 return;
1052 }
1053 } else {
1054 /* Reset timeout value back to seconds */
1055 loop = 30;
1056 }
1057 }
1058}
1059
1060
1061/*****************************************************************************
1062 * edge_close
1063 * this function is called by the tty driver when a port is closed
1064 *****************************************************************************/
1065static void edge_close(struct usb_serial_port *port)
1066{
1067 struct edgeport_serial *edge_serial;
1068 struct edgeport_port *edge_port;
1069 int status;
1070
1071 dbg("%s - port %d", __func__, port->number);
1072
1073 edge_serial = usb_get_serial_data(port->serial);
1074 edge_port = usb_get_serial_port_data(port);
1075 if (edge_serial == NULL || edge_port == NULL)
1076 return;
1077
1078 /* block until tx is empty */
1079 block_until_tx_empty(edge_port);
1080
1081 edge_port->closePending = true;
1082
1083 if ((!edge_serial->is_epic) ||
1084 ((edge_serial->is_epic) &&
1085 (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1086 /* flush and chase */
1087 edge_port->chaseResponsePending = true;
1088
1089 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1090 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1091 if (status == 0)
1092 /* block until chase finished */
1093 block_until_chase_response(edge_port);
1094 else
1095 edge_port->chaseResponsePending = false;
1096 }
1097
1098 if ((!edge_serial->is_epic) ||
1099 ((edge_serial->is_epic) &&
1100 (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1101 /* close the port */
1102 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __func__);
1103 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1104 }
1105
1106 /* port->close = true; */
1107 edge_port->closePending = false;
1108 edge_port->open = false;
1109 edge_port->openPending = false;
1110
1111 usb_kill_urb(edge_port->write_urb);
1112
1113 if (edge_port->write_urb) {
1114 /* if this urb had a transfer buffer already
1115 (old transfer) free it */
1116 kfree(edge_port->write_urb->transfer_buffer);
1117 usb_free_urb(edge_port->write_urb);
1118 edge_port->write_urb = NULL;
1119 }
1120 kfree(edge_port->txfifo.fifo);
1121 edge_port->txfifo.fifo = NULL;
1122
1123 dbg("%s exited", __func__);
1124}
1125
1126/*****************************************************************************
1127 * SerialWrite
1128 * this function is called by the tty driver when data should be written
1129 * to the port.
1130 * If successful, we return the number of bytes written, otherwise we
1131 * return a negative error number.
1132 *****************************************************************************/
1133static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1134 const unsigned char *data, int count)
1135{
1136 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1137 struct TxFifo *fifo;
1138 int copySize;
1139 int bytesleft;
1140 int firsthalf;
1141 int secondhalf;
1142 unsigned long flags;
1143
1144 dbg("%s - port %d", __func__, port->number);
1145
1146 if (edge_port == NULL)
1147 return -ENODEV;
1148
1149 /* get a pointer to the Tx fifo */
1150 fifo = &edge_port->txfifo;
1151
1152 spin_lock_irqsave(&edge_port->ep_lock, flags);
1153
1154 /* calculate number of bytes to put in fifo */
1155 copySize = min((unsigned int)count,
1156 (edge_port->txCredits - fifo->count));
1157
1158 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes",
1159 __func__, port->number, count,
1160 edge_port->txCredits - fifo->count, copySize);
1161
1162 /* catch writes of 0 bytes which the tty driver likes to give us,
1163 and when txCredits is empty */
1164 if (copySize == 0) {
1165 dbg("%s - copySize = Zero", __func__);
1166 goto finish_write;
1167 }
1168
1169 /* queue the data
1170 * since we can never overflow the buffer we do not have to check for a
1171 * full condition
1172 *
1173 * the copy is done is two parts -- first fill to the end of the buffer
1174 * then copy the reset from the start of the buffer
1175 */
1176 bytesleft = fifo->size - fifo->head;
1177 firsthalf = min(bytesleft, copySize);
1178 dbg("%s - copy %d bytes of %d into fifo ", __func__,
1179 firsthalf, bytesleft);
1180
1181 /* now copy our data */
1182 memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1183 usb_serial_debug_data(debug, &port->dev, __func__,
1184 firsthalf, &fifo->fifo[fifo->head]);
1185
1186 /* update the index and size */
1187 fifo->head += firsthalf;
1188 fifo->count += firsthalf;
1189
1190 /* wrap the index */
1191 if (fifo->head == fifo->size)
1192 fifo->head = 0;
1193
1194 secondhalf = copySize-firsthalf;
1195
1196 if (secondhalf) {
1197 dbg("%s - copy rest of data %d", __func__, secondhalf);
1198 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1199 usb_serial_debug_data(debug, &port->dev, __func__,
1200 secondhalf, &fifo->fifo[fifo->head]);
1201 /* update the index and size */
1202 fifo->count += secondhalf;
1203 fifo->head += secondhalf;
1204 /* No need to check for wrap since we can not get to end of
1205 * the fifo in this part
1206 */
1207 }
1208
1209finish_write:
1210 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1211
1212 send_more_port_data((struct edgeport_serial *)
1213 usb_get_serial_data(port->serial), edge_port);
1214
1215 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __func__,
1216 copySize, edge_port->txCredits, fifo->count);
1217
1218 return copySize;
1219}
1220
1221
1222/************************************************************************
1223 *
1224 * send_more_port_data()
1225 *
1226 * This routine attempts to write additional UART transmit data
1227 * to a port over the USB bulk pipe. It is called (1) when new
1228 * data has been written to a port's TxBuffer from higher layers
1229 * (2) when the peripheral sends us additional TxCredits indicating
1230 * that it can accept more Tx data for a given port; and (3) when
1231 * a bulk write completes successfully and we want to see if we
1232 * can transmit more.
1233 *
1234 ************************************************************************/
1235static void send_more_port_data(struct edgeport_serial *edge_serial,
1236 struct edgeport_port *edge_port)
1237{
1238 struct TxFifo *fifo = &edge_port->txfifo;
1239 struct urb *urb;
1240 unsigned char *buffer;
1241 int status;
1242 int count;
1243 int bytesleft;
1244 int firsthalf;
1245 int secondhalf;
1246 unsigned long flags;
1247
1248 dbg("%s(%d)", __func__, edge_port->port->number);
1249
1250 spin_lock_irqsave(&edge_port->ep_lock, flags);
1251
1252 if (edge_port->write_in_progress ||
1253 !edge_port->open ||
1254 (fifo->count == 0)) {
1255 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d",
1256 __func__, edge_port->port->number,
1257 fifo->count, edge_port->write_in_progress);
1258 goto exit_send;
1259 }
1260
1261 /* since the amount of data in the fifo will always fit into the
1262 * edgeport buffer we do not need to check the write length
1263 *
1264 * Do we have enough credits for this port to make it worthwhile
1265 * to bother queueing a write. If it's too small, say a few bytes,
1266 * it's better to wait for more credits so we can do a larger write.
1267 */
1268 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1269 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d",
1270 __func__, edge_port->port->number, fifo->count,
1271 edge_port->txCredits);
1272 goto exit_send;
1273 }
1274
1275 /* lock this write */
1276 edge_port->write_in_progress = true;
1277
1278 /* get a pointer to the write_urb */
1279 urb = edge_port->write_urb;
1280
1281 /* make sure transfer buffer is freed */
1282 kfree(urb->transfer_buffer);
1283 urb->transfer_buffer = NULL;
1284
1285 /* build the data header for the buffer and port that we are about
1286 to send out */
1287 count = fifo->count;
1288 buffer = kmalloc(count+2, GFP_ATOMIC);
1289 if (buffer == NULL) {
1290 dev_err_console(edge_port->port,
1291 "%s - no more kernel memory...\n", __func__);
1292 edge_port->write_in_progress = false;
1293 goto exit_send;
1294 }
1295 buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number
1296 - edge_port->port->serial->minor, count);
1297 buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number
1298 - edge_port->port->serial->minor, count);
1299
1300 /* now copy our data */
1301 bytesleft = fifo->size - fifo->tail;
1302 firsthalf = min(bytesleft, count);
1303 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1304 fifo->tail += firsthalf;
1305 fifo->count -= firsthalf;
1306 if (fifo->tail == fifo->size)
1307 fifo->tail = 0;
1308
1309 secondhalf = count-firsthalf;
1310 if (secondhalf) {
1311 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1312 secondhalf);
1313 fifo->tail += secondhalf;
1314 fifo->count -= secondhalf;
1315 }
1316
1317 if (count)
1318 usb_serial_debug_data(debug, &edge_port->port->dev,
1319 __func__, count, &buffer[2]);
1320
1321 /* fill up the urb with all of our data and submit it */
1322 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1323 usb_sndbulkpipe(edge_serial->serial->dev,
1324 edge_serial->bulk_out_endpoint),
1325 buffer, count+2,
1326 edge_bulk_out_data_callback, edge_port);
1327
1328 /* decrement the number of credits we have by the number we just sent */
1329 edge_port->txCredits -= count;
1330 edge_port->icount.tx += count;
1331
1332 status = usb_submit_urb(urb, GFP_ATOMIC);
1333 if (status) {
1334 /* something went wrong */
1335 dev_err_console(edge_port->port,
1336 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1337 __func__, status);
1338 edge_port->write_in_progress = false;
1339
1340 /* revert the credits as something bad happened. */
1341 edge_port->txCredits += count;
1342 edge_port->icount.tx -= count;
1343 }
1344 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d",
1345 __func__, count, edge_port->txCredits, fifo->count);
1346
1347exit_send:
1348 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1349}
1350
1351
1352/*****************************************************************************
1353 * edge_write_room
1354 * this function is called by the tty driver when it wants to know how
1355 * many bytes of data we can accept for a specific port. If successful,
1356 * we return the amount of room that we have for this port (the txCredits)
1357 * otherwise we return a negative error number.
1358 *****************************************************************************/
1359static int edge_write_room(struct tty_struct *tty)
1360{
1361 struct usb_serial_port *port = tty->driver_data;
1362 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1363 int room;
1364 unsigned long flags;
1365
1366 dbg("%s", __func__);
1367
1368 if (edge_port == NULL)
1369 return 0;
1370 if (edge_port->closePending)
1371 return 0;
1372
1373 dbg("%s - port %d", __func__, port->number);
1374
1375 if (!edge_port->open) {
1376 dbg("%s - port not opened", __func__);
1377 return 0;
1378 }
1379
1380 /* total of both buffers is still txCredit */
1381 spin_lock_irqsave(&edge_port->ep_lock, flags);
1382 room = edge_port->txCredits - edge_port->txfifo.count;
1383 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1384
1385 dbg("%s - returns %d", __func__, room);
1386 return room;
1387}
1388
1389
1390/*****************************************************************************
1391 * edge_chars_in_buffer
1392 * this function is called by the tty driver when it wants to know how
1393 * many bytes of data we currently have outstanding in the port (data that
1394 * has been written, but hasn't made it out the port yet)
1395 * If successful, we return the number of bytes left to be written in the
1396 * system,
1397 * Otherwise we return a negative error number.
1398 *****************************************************************************/
1399static int edge_chars_in_buffer(struct tty_struct *tty)
1400{
1401 struct usb_serial_port *port = tty->driver_data;
1402 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1403 int num_chars;
1404 unsigned long flags;
1405
1406 dbg("%s", __func__);
1407
1408 if (edge_port == NULL)
1409 return 0;
1410 if (edge_port->closePending)
1411 return 0;
1412
1413 if (!edge_port->open) {
1414 dbg("%s - port not opened", __func__);
1415 return 0;
1416 }
1417
1418 spin_lock_irqsave(&edge_port->ep_lock, flags);
1419 num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1420 edge_port->txfifo.count;
1421 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1422 if (num_chars) {
1423 dbg("%s(port %d) - returns %d", __func__,
1424 port->number, num_chars);
1425 }
1426
1427 return num_chars;
1428}
1429
1430
1431/*****************************************************************************
1432 * SerialThrottle
1433 * this function is called by the tty driver when it wants to stop the data
1434 * being read from the port.
1435 *****************************************************************************/
1436static void edge_throttle(struct tty_struct *tty)
1437{
1438 struct usb_serial_port *port = tty->driver_data;
1439 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1440 int status;
1441
1442 dbg("%s - port %d", __func__, port->number);
1443
1444 if (edge_port == NULL)
1445 return;
1446
1447 if (!edge_port->open) {
1448 dbg("%s - port not opened", __func__);
1449 return;
1450 }
1451
1452 /* if we are implementing XON/XOFF, send the stop character */
1453 if (I_IXOFF(tty)) {
1454 unsigned char stop_char = STOP_CHAR(tty);
1455 status = edge_write(tty, port, &stop_char, 1);
1456 if (status <= 0)
1457 return;
1458 }
1459
1460 /* if we are implementing RTS/CTS, toggle that line */
1461 if (tty->termios->c_cflag & CRTSCTS) {
1462 edge_port->shadowMCR &= ~MCR_RTS;
1463 status = send_cmd_write_uart_register(edge_port, MCR,
1464 edge_port->shadowMCR);
1465 if (status != 0)
1466 return;
1467 }
1468}
1469
1470
1471/*****************************************************************************
1472 * edge_unthrottle
1473 * this function is called by the tty driver when it wants to resume the
1474 * data being read from the port (called after SerialThrottle is called)
1475 *****************************************************************************/
1476static void edge_unthrottle(struct tty_struct *tty)
1477{
1478 struct usb_serial_port *port = tty->driver_data;
1479 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1480 int status;
1481
1482 dbg("%s - port %d", __func__, port->number);
1483
1484 if (edge_port == NULL)
1485 return;
1486
1487 if (!edge_port->open) {
1488 dbg("%s - port not opened", __func__);
1489 return;
1490 }
1491
1492 /* if we are implementing XON/XOFF, send the start character */
1493 if (I_IXOFF(tty)) {
1494 unsigned char start_char = START_CHAR(tty);
1495 status = edge_write(tty, port, &start_char, 1);
1496 if (status <= 0)
1497 return;
1498 }
1499 /* if we are implementing RTS/CTS, toggle that line */
1500 if (tty->termios->c_cflag & CRTSCTS) {
1501 edge_port->shadowMCR |= MCR_RTS;
1502 send_cmd_write_uart_register(edge_port, MCR,
1503 edge_port->shadowMCR);
1504 }
1505}
1506
1507
1508/*****************************************************************************
1509 * SerialSetTermios
1510 * this function is called by the tty driver when it wants to change
1511 * the termios structure
1512 *****************************************************************************/
1513static void edge_set_termios(struct tty_struct *tty,
1514 struct usb_serial_port *port, struct ktermios *old_termios)
1515{
1516 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1517 unsigned int cflag;
1518
1519 cflag = tty->termios->c_cflag;
1520 dbg("%s - clfag %08x iflag %08x", __func__,
1521 tty->termios->c_cflag, tty->termios->c_iflag);
1522 dbg("%s - old clfag %08x old iflag %08x", __func__,
1523 old_termios->c_cflag, old_termios->c_iflag);
1524
1525 dbg("%s - port %d", __func__, port->number);
1526
1527 if (edge_port == NULL)
1528 return;
1529
1530 if (!edge_port->open) {
1531 dbg("%s - port not opened", __func__);
1532 return;
1533 }
1534
1535 /* change the port settings to the new ones specified */
1536 change_port_settings(tty, edge_port, old_termios);
1537}
1538
1539
1540/*****************************************************************************
1541 * get_lsr_info - get line status register info
1542 *
1543 * Purpose: Let user call ioctl() to get info when the UART physically
1544 * is emptied. On bus types like RS485, the transmitter must
1545 * release the bus after transmitting. This must be done when
1546 * the transmit shift register is empty, not be done when the
1547 * transmit holding register is empty. This functionality
1548 * allows an RS485 driver to be written in user space.
1549 *****************************************************************************/
1550static int get_lsr_info(struct edgeport_port *edge_port,
1551 unsigned int __user *value)
1552{
1553 unsigned int result = 0;
1554 unsigned long flags;
1555
1556 spin_lock_irqsave(&edge_port->ep_lock, flags);
1557 if (edge_port->maxTxCredits == edge_port->txCredits &&
1558 edge_port->txfifo.count == 0) {
1559 dbg("%s -- Empty", __func__);
1560 result = TIOCSER_TEMT;
1561 }
1562 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1563
1564 if (copy_to_user(value, &result, sizeof(int)))
1565 return -EFAULT;
1566 return 0;
1567}
1568
1569static int edge_tiocmset(struct tty_struct *tty,
1570 unsigned int set, unsigned int clear)
1571{
1572 struct usb_serial_port *port = tty->driver_data;
1573 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1574 unsigned int mcr;
1575
1576 dbg("%s - port %d", __func__, port->number);
1577
1578 mcr = edge_port->shadowMCR;
1579 if (set & TIOCM_RTS)
1580 mcr |= MCR_RTS;
1581 if (set & TIOCM_DTR)
1582 mcr |= MCR_DTR;
1583 if (set & TIOCM_LOOP)
1584 mcr |= MCR_LOOPBACK;
1585
1586 if (clear & TIOCM_RTS)
1587 mcr &= ~MCR_RTS;
1588 if (clear & TIOCM_DTR)
1589 mcr &= ~MCR_DTR;
1590 if (clear & TIOCM_LOOP)
1591 mcr &= ~MCR_LOOPBACK;
1592
1593 edge_port->shadowMCR = mcr;
1594
1595 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1596
1597 return 0;
1598}
1599
1600static int edge_tiocmget(struct tty_struct *tty)
1601{
1602 struct usb_serial_port *port = tty->driver_data;
1603 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1604 unsigned int result = 0;
1605 unsigned int msr;
1606 unsigned int mcr;
1607
1608 dbg("%s - port %d", __func__, port->number);
1609
1610 msr = edge_port->shadowMSR;
1611 mcr = edge_port->shadowMCR;
1612 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1613 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1614 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1615 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
1616 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1617 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1618
1619
1620 dbg("%s -- %x", __func__, result);
1621
1622 return result;
1623}
1624
1625static int edge_get_icount(struct tty_struct *tty,
1626 struct serial_icounter_struct *icount)
1627{
1628 struct usb_serial_port *port = tty->driver_data;
1629 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1630 struct async_icount cnow;
1631 cnow = edge_port->icount;
1632
1633 icount->cts = cnow.cts;
1634 icount->dsr = cnow.dsr;
1635 icount->rng = cnow.rng;
1636 icount->dcd = cnow.dcd;
1637 icount->rx = cnow.rx;
1638 icount->tx = cnow.tx;
1639 icount->frame = cnow.frame;
1640 icount->overrun = cnow.overrun;
1641 icount->parity = cnow.parity;
1642 icount->brk = cnow.brk;
1643 icount->buf_overrun = cnow.buf_overrun;
1644
1645 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d",
1646 __func__, port->number, icount->rx, icount->tx);
1647 return 0;
1648}
1649
1650static int get_serial_info(struct edgeport_port *edge_port,
1651 struct serial_struct __user *retinfo)
1652{
1653 struct serial_struct tmp;
1654
1655 if (!retinfo)
1656 return -EFAULT;
1657
1658 memset(&tmp, 0, sizeof(tmp));
1659
1660 tmp.type = PORT_16550A;
1661 tmp.line = edge_port->port->serial->minor;
1662 tmp.port = edge_port->port->number;
1663 tmp.irq = 0;
1664 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1665 tmp.xmit_fifo_size = edge_port->maxTxCredits;
1666 tmp.baud_base = 9600;
1667 tmp.close_delay = 5*HZ;
1668 tmp.closing_wait = 30*HZ;
1669
1670 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1671 return -EFAULT;
1672 return 0;
1673}
1674
1675
1676/*****************************************************************************
1677 * SerialIoctl
1678 * this function handles any ioctl calls to the driver
1679 *****************************************************************************/
1680static int edge_ioctl(struct tty_struct *tty,
1681 unsigned int cmd, unsigned long arg)
1682{
1683 struct usb_serial_port *port = tty->driver_data;
1684 DEFINE_WAIT(wait);
1685 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1686 struct async_icount cnow;
1687 struct async_icount cprev;
1688
1689 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
1690
1691 switch (cmd) {
1692 case TIOCSERGETLSR:
1693 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
1694 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1695
1696 case TIOCGSERIAL:
1697 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
1698 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1699
1700 case TIOCMIWAIT:
1701 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
1702 cprev = edge_port->icount;
1703 while (1) {
1704 prepare_to_wait(&edge_port->delta_msr_wait,
1705 &wait, TASK_INTERRUPTIBLE);
1706 schedule();
1707 finish_wait(&edge_port->delta_msr_wait, &wait);
1708 /* see if a signal did it */
1709 if (signal_pending(current))
1710 return -ERESTARTSYS;
1711 cnow = edge_port->icount;
1712 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1713 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1714 return -EIO; /* no change => error */
1715 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1716 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1717 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1718 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
1719 return 0;
1720 }
1721 cprev = cnow;
1722 }
1723 /* NOTREACHED */
1724 break;
1725
1726 }
1727 return -ENOIOCTLCMD;
1728}
1729
1730
1731/*****************************************************************************
1732 * SerialBreak
1733 * this function sends a break to the port
1734 *****************************************************************************/
1735static void edge_break(struct tty_struct *tty, int break_state)
1736{
1737 struct usb_serial_port *port = tty->driver_data;
1738 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1739 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1740 int status;
1741
1742 if ((!edge_serial->is_epic) ||
1743 ((edge_serial->is_epic) &&
1744 (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1745 /* flush and chase */
1746 edge_port->chaseResponsePending = true;
1747
1748 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1749 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1750 if (status == 0) {
1751 /* block until chase finished */
1752 block_until_chase_response(edge_port);
1753 } else {
1754 edge_port->chaseResponsePending = false;
1755 }
1756 }
1757
1758 if ((!edge_serial->is_epic) ||
1759 ((edge_serial->is_epic) &&
1760 (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1761 if (break_state == -1) {
1762 dbg("%s - Sending IOSP_CMD_SET_BREAK", __func__);
1763 status = send_iosp_ext_cmd(edge_port,
1764 IOSP_CMD_SET_BREAK, 0);
1765 } else {
1766 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __func__);
1767 status = send_iosp_ext_cmd(edge_port,
1768 IOSP_CMD_CLEAR_BREAK, 0);
1769 }
1770 if (status)
1771 dbg("%s - error sending break set/clear command.",
1772 __func__);
1773 }
1774}
1775
1776
1777/*****************************************************************************
1778 * process_rcvd_data
1779 * this function handles the data received on the bulk in pipe.
1780 *****************************************************************************/
1781static void process_rcvd_data(struct edgeport_serial *edge_serial,
1782 unsigned char *buffer, __u16 bufferLength)
1783{
1784 struct usb_serial_port *port;
1785 struct edgeport_port *edge_port;
1786 struct tty_struct *tty;
1787 __u16 lastBufferLength;
1788 __u16 rxLen;
1789
1790 dbg("%s", __func__);
1791
1792 lastBufferLength = bufferLength + 1;
1793
1794 while (bufferLength > 0) {
1795 /* failsafe incase we get a message that we don't understand */
1796 if (lastBufferLength == bufferLength) {
1797 dbg("%s - stuck in loop, exiting it.", __func__);
1798 break;
1799 }
1800 lastBufferLength = bufferLength;
1801
1802 switch (edge_serial->rxState) {
1803 case EXPECT_HDR1:
1804 edge_serial->rxHeader1 = *buffer;
1805 ++buffer;
1806 --bufferLength;
1807
1808 if (bufferLength == 0) {
1809 edge_serial->rxState = EXPECT_HDR2;
1810 break;
1811 }
1812 /* otherwise, drop on through */
1813 case EXPECT_HDR2:
1814 edge_serial->rxHeader2 = *buffer;
1815 ++buffer;
1816 --bufferLength;
1817
1818 dbg("%s - Hdr1=%02X Hdr2=%02X", __func__,
1819 edge_serial->rxHeader1, edge_serial->rxHeader2);
1820 /* Process depending on whether this header is
1821 * data or status */
1822
1823 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1824 /* Decode this status header and go to
1825 * EXPECT_HDR1 (if we can process the status
1826 * with only 2 bytes), or go to EXPECT_HDR3 to
1827 * get the third byte. */
1828 edge_serial->rxPort =
1829 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1830 edge_serial->rxStatusCode =
1831 IOSP_GET_STATUS_CODE(
1832 edge_serial->rxHeader1);
1833
1834 if (!IOSP_STATUS_IS_2BYTE(
1835 edge_serial->rxStatusCode)) {
1836 /* This status needs additional bytes.
1837 * Save what we have and then wait for
1838 * more data.
1839 */
1840 edge_serial->rxStatusParam
1841 = edge_serial->rxHeader2;
1842 edge_serial->rxState = EXPECT_HDR3;
1843 break;
1844 }
1845 /* We have all the header bytes, process the
1846 status now */
1847 process_rcvd_status(edge_serial,
1848 edge_serial->rxHeader2, 0);
1849 edge_serial->rxState = EXPECT_HDR1;
1850 break;
1851 } else {
1852 edge_serial->rxPort =
1853 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1854 edge_serial->rxBytesRemaining =
1855 IOSP_GET_HDR_DATA_LEN(
1856 edge_serial->rxHeader1,
1857 edge_serial->rxHeader2);
1858 dbg("%s - Data for Port %u Len %u",
1859 __func__,
1860 edge_serial->rxPort,
1861 edge_serial->rxBytesRemaining);
1862
1863 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1864 * ASSERT(DevExt->RxBytesRemaining <
1865 * IOSP_MAX_DATA_LENGTH);
1866 */
1867
1868 if (bufferLength == 0) {
1869 edge_serial->rxState = EXPECT_DATA;
1870 break;
1871 }
1872 /* Else, drop through */
1873 }
1874 case EXPECT_DATA: /* Expect data */
1875 if (bufferLength < edge_serial->rxBytesRemaining) {
1876 rxLen = bufferLength;
1877 /* Expect data to start next buffer */
1878 edge_serial->rxState = EXPECT_DATA;
1879 } else {
1880 /* BufLen >= RxBytesRemaining */
1881 rxLen = edge_serial->rxBytesRemaining;
1882 /* Start another header next time */
1883 edge_serial->rxState = EXPECT_HDR1;
1884 }
1885
1886 bufferLength -= rxLen;
1887 edge_serial->rxBytesRemaining -= rxLen;
1888
1889 /* spit this data back into the tty driver if this
1890 port is open */
1891 if (rxLen) {
1892 port = edge_serial->serial->port[
1893 edge_serial->rxPort];
1894 edge_port = usb_get_serial_port_data(port);
1895 if (edge_port->open) {
1896 tty = tty_port_tty_get(
1897 &edge_port->port->port);
1898 if (tty) {
1899 dbg("%s - Sending %d bytes to TTY for port %d",
1900 __func__, rxLen, edge_serial->rxPort);
1901 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
1902 tty_kref_put(tty);
1903 }
1904 edge_port->icount.rx += rxLen;
1905 }
1906 buffer += rxLen;
1907 }
1908 break;
1909
1910 case EXPECT_HDR3: /* Expect 3rd byte of status header */
1911 edge_serial->rxHeader3 = *buffer;
1912 ++buffer;
1913 --bufferLength;
1914
1915 /* We have all the header bytes, process the
1916 status now */
1917 process_rcvd_status(edge_serial,
1918 edge_serial->rxStatusParam,
1919 edge_serial->rxHeader3);
1920 edge_serial->rxState = EXPECT_HDR1;
1921 break;
1922 }
1923 }
1924}
1925
1926
1927/*****************************************************************************
1928 * process_rcvd_status
1929 * this function handles the any status messages received on the
1930 * bulk in pipe.
1931 *****************************************************************************/
1932static void process_rcvd_status(struct edgeport_serial *edge_serial,
1933 __u8 byte2, __u8 byte3)
1934{
1935 struct usb_serial_port *port;
1936 struct edgeport_port *edge_port;
1937 struct tty_struct *tty;
1938 __u8 code = edge_serial->rxStatusCode;
1939
1940 /* switch the port pointer to the one being currently talked about */
1941 port = edge_serial->serial->port[edge_serial->rxPort];
1942 edge_port = usb_get_serial_port_data(port);
1943 if (edge_port == NULL) {
1944 dev_err(&edge_serial->serial->dev->dev,
1945 "%s - edge_port == NULL for port %d\n",
1946 __func__, edge_serial->rxPort);
1947 return;
1948 }
1949
1950 dbg("%s - port %d", __func__, edge_serial->rxPort);
1951
1952 if (code == IOSP_EXT_STATUS) {
1953 switch (byte2) {
1954 case IOSP_EXT_STATUS_CHASE_RSP:
1955 /* we want to do EXT status regardless of port
1956 * open/closed */
1957 dbg("%s - Port %u EXT CHASE_RSP Data = %02x",
1958 __func__, edge_serial->rxPort, byte3);
1959 /* Currently, the only EXT_STATUS is Chase, so process
1960 * here instead of one more call to one more subroutine
1961 * If/when more EXT_STATUS, there'll be more work to do
1962 * Also, we currently clear flag and close the port
1963 * regardless of content of above's Byte3.
1964 * We could choose to do something else when Byte3 says
1965 * Timeout on Chase from Edgeport, like wait longer in
1966 * block_until_chase_response, but for now we don't.
1967 */
1968 edge_port->chaseResponsePending = false;
1969 wake_up(&edge_port->wait_chase);
1970 return;
1971
1972 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1973 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============", __func__, edge_serial->rxPort, byte3);
1974 /* Port->RxCheckRsp = true; */
1975 return;
1976 }
1977 }
1978
1979 if (code == IOSP_STATUS_OPEN_RSP) {
1980 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1981 edge_port->maxTxCredits = edge_port->txCredits;
1982 dbg("%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d", __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1983 handle_new_msr(edge_port, byte2);
1984
1985 /* send the current line settings to the port so we are
1986 in sync with any further termios calls */
1987 tty = tty_port_tty_get(&edge_port->port->port);
1988 if (tty) {
1989 change_port_settings(tty,
1990 edge_port, tty->termios);
1991 tty_kref_put(tty);
1992 }
1993
1994 /* we have completed the open */
1995 edge_port->openPending = false;
1996 edge_port->open = true;
1997 wake_up(&edge_port->wait_open);
1998 return;
1999 }
2000
2001 /* If port is closed, silently discard all rcvd status. We can
2002 * have cases where buffered status is received AFTER the close
2003 * port command is sent to the Edgeport.
2004 */
2005 if (!edge_port->open || edge_port->closePending)
2006 return;
2007
2008 switch (code) {
2009 /* Not currently sent by Edgeport */
2010 case IOSP_STATUS_LSR:
2011 dbg("%s - Port %u LSR Status = %02x",
2012 __func__, edge_serial->rxPort, byte2);
2013 handle_new_lsr(edge_port, false, byte2, 0);
2014 break;
2015
2016 case IOSP_STATUS_LSR_DATA:
2017 dbg("%s - Port %u LSR Status = %02x, Data = %02x",
2018 __func__, edge_serial->rxPort, byte2, byte3);
2019 /* byte2 is LSR Register */
2020 /* byte3 is broken data byte */
2021 handle_new_lsr(edge_port, true, byte2, byte3);
2022 break;
2023 /*
2024 * case IOSP_EXT_4_STATUS:
2025 * dbg("%s - Port %u LSR Status = %02x Data = %02x",
2026 * __func__, edge_serial->rxPort, byte2, byte3);
2027 * break;
2028 */
2029 case IOSP_STATUS_MSR:
2030 dbg("%s - Port %u MSR Status = %02x",
2031 __func__, edge_serial->rxPort, byte2);
2032 /*
2033 * Process this new modem status and generate appropriate
2034 * events, etc, based on the new status. This routine
2035 * also saves the MSR in Port->ShadowMsr.
2036 */
2037 handle_new_msr(edge_port, byte2);
2038 break;
2039
2040 default:
2041 dbg("%s - Unrecognized IOSP status code %u", __func__, code);
2042 break;
2043 }
2044}
2045
2046
2047/*****************************************************************************
2048 * edge_tty_recv
2049 * this function passes data on to the tty flip buffer
2050 *****************************************************************************/
2051static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
2052 unsigned char *data, int length)
2053{
2054 int cnt;
2055
2056 cnt = tty_insert_flip_string(tty, data, length);
2057 if (cnt < length) {
2058 dev_err(dev, "%s - dropping data, %d bytes lost\n",
2059 __func__, length - cnt);
2060 }
2061 data += cnt;
2062 length -= cnt;
2063
2064 tty_flip_buffer_push(tty);
2065}
2066
2067
2068/*****************************************************************************
2069 * handle_new_msr
2070 * this function handles any change to the msr register for a port.
2071 *****************************************************************************/
2072static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2073{
2074 struct async_icount *icount;
2075
2076 dbg("%s %02x", __func__, newMsr);
2077
2078 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
2079 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2080 icount = &edge_port->icount;
2081
2082 /* update input line counters */
2083 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
2084 icount->cts++;
2085 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
2086 icount->dsr++;
2087 if (newMsr & EDGEPORT_MSR_DELTA_CD)
2088 icount->dcd++;
2089 if (newMsr & EDGEPORT_MSR_DELTA_RI)
2090 icount->rng++;
2091 wake_up_interruptible(&edge_port->delta_msr_wait);
2092 }
2093
2094 /* Save the new modem status */
2095 edge_port->shadowMSR = newMsr & 0xf0;
2096}
2097
2098
2099/*****************************************************************************
2100 * handle_new_lsr
2101 * this function handles any change to the lsr register for a port.
2102 *****************************************************************************/
2103static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
2104 __u8 lsr, __u8 data)
2105{
2106 __u8 newLsr = (__u8) (lsr & (__u8)
2107 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2108 struct async_icount *icount;
2109
2110 dbg("%s - %02x", __func__, newLsr);
2111
2112 edge_port->shadowLSR = lsr;
2113
2114 if (newLsr & LSR_BREAK) {
2115 /*
2116 * Parity and Framing errors only count if they
2117 * occur exclusive of a break being
2118 * received.
2119 */
2120 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2121 }
2122
2123 /* Place LSR data byte into Rx buffer */
2124 if (lsrData) {
2125 struct tty_struct *tty =
2126 tty_port_tty_get(&edge_port->port->port);
2127 if (tty) {
2128 edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
2129 tty_kref_put(tty);
2130 }
2131 }
2132 /* update input line counters */
2133 icount = &edge_port->icount;
2134 if (newLsr & LSR_BREAK)
2135 icount->brk++;
2136 if (newLsr & LSR_OVER_ERR)
2137 icount->overrun++;
2138 if (newLsr & LSR_PAR_ERR)
2139 icount->parity++;
2140 if (newLsr & LSR_FRM_ERR)
2141 icount->frame++;
2142}
2143
2144
2145/****************************************************************************
2146 * sram_write
2147 * writes a number of bytes to the Edgeport device's sram starting at the
2148 * given address.
2149 * If successful returns the number of bytes written, otherwise it returns
2150 * a negative error number of the problem.
2151 ****************************************************************************/
2152static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2153 __u16 length, const __u8 *data)
2154{
2155 int result;
2156 __u16 current_length;
2157 unsigned char *transfer_buffer;
2158
2159 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2160
2161 transfer_buffer = kmalloc(64, GFP_KERNEL);
2162 if (!transfer_buffer) {
2163 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2164 __func__, 64);
2165 return -ENOMEM;
2166 }
2167
2168 /* need to split these writes up into 64 byte chunks */
2169 result = 0;
2170 while (length > 0) {
2171 if (length > 64)
2172 current_length = 64;
2173 else
2174 current_length = length;
2175
2176/* dbg("%s - writing %x, %x, %d", __func__,
2177 extAddr, addr, current_length); */
2178 memcpy(transfer_buffer, data, current_length);
2179 result = usb_control_msg(serial->dev,
2180 usb_sndctrlpipe(serial->dev, 0),
2181 USB_REQUEST_ION_WRITE_RAM,
2182 0x40, addr, extAddr, transfer_buffer,
2183 current_length, 300);
2184 if (result < 0)
2185 break;
2186 length -= current_length;
2187 addr += current_length;
2188 data += current_length;
2189 }
2190
2191 kfree(transfer_buffer);
2192 return result;
2193}
2194
2195
2196/****************************************************************************
2197 * rom_write
2198 * writes a number of bytes to the Edgeport device's ROM starting at the
2199 * given address.
2200 * If successful returns the number of bytes written, otherwise it returns
2201 * a negative error number of the problem.
2202 ****************************************************************************/
2203static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2204 __u16 length, const __u8 *data)
2205{
2206 int result;
2207 __u16 current_length;
2208 unsigned char *transfer_buffer;
2209
2210/* dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); */
2211
2212 transfer_buffer = kmalloc(64, GFP_KERNEL);
2213 if (!transfer_buffer) {
2214 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2215 __func__, 64);
2216 return -ENOMEM;
2217 }
2218
2219 /* need to split these writes up into 64 byte chunks */
2220 result = 0;
2221 while (length > 0) {
2222 if (length > 64)
2223 current_length = 64;
2224 else
2225 current_length = length;
2226/* dbg("%s - writing %x, %x, %d", __func__,
2227 extAddr, addr, current_length); */
2228 memcpy(transfer_buffer, data, current_length);
2229 result = usb_control_msg(serial->dev,
2230 usb_sndctrlpipe(serial->dev, 0),
2231 USB_REQUEST_ION_WRITE_ROM, 0x40,
2232 addr, extAddr,
2233 transfer_buffer, current_length, 300);
2234 if (result < 0)
2235 break;
2236 length -= current_length;
2237 addr += current_length;
2238 data += current_length;
2239 }
2240
2241 kfree(transfer_buffer);
2242 return result;
2243}
2244
2245
2246/****************************************************************************
2247 * rom_read
2248 * reads a number of bytes from the Edgeport device starting at the given
2249 * address.
2250 * If successful returns the number of bytes read, otherwise it returns
2251 * a negative error number of the problem.
2252 ****************************************************************************/
2253static int rom_read(struct usb_serial *serial, __u16 extAddr,
2254 __u16 addr, __u16 length, __u8 *data)
2255{
2256 int result;
2257 __u16 current_length;
2258 unsigned char *transfer_buffer;
2259
2260 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2261
2262 transfer_buffer = kmalloc(64, GFP_KERNEL);
2263 if (!transfer_buffer) {
2264 dev_err(&serial->dev->dev,
2265 "%s - kmalloc(%d) failed.\n", __func__, 64);
2266 return -ENOMEM;
2267 }
2268
2269 /* need to split these reads up into 64 byte chunks */
2270 result = 0;
2271 while (length > 0) {
2272 if (length > 64)
2273 current_length = 64;
2274 else
2275 current_length = length;
2276/* dbg("%s - %x, %x, %d", __func__,
2277 extAddr, addr, current_length); */
2278 result = usb_control_msg(serial->dev,
2279 usb_rcvctrlpipe(serial->dev, 0),
2280 USB_REQUEST_ION_READ_ROM,
2281 0xC0, addr, extAddr, transfer_buffer,
2282 current_length, 300);
2283 if (result < 0)
2284 break;
2285 memcpy(data, transfer_buffer, current_length);
2286 length -= current_length;
2287 addr += current_length;
2288 data += current_length;
2289 }
2290
2291 kfree(transfer_buffer);
2292 return result;
2293}
2294
2295
2296/****************************************************************************
2297 * send_iosp_ext_cmd
2298 * Is used to send a IOSP message to the Edgeport device
2299 ****************************************************************************/
2300static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2301 __u8 command, __u8 param)
2302{
2303 unsigned char *buffer;
2304 unsigned char *currentCommand;
2305 int length = 0;
2306 int status = 0;
2307
2308 dbg("%s - %d, %d", __func__, command, param);
2309
2310 buffer = kmalloc(10, GFP_ATOMIC);
2311 if (!buffer) {
2312 dev_err(&edge_port->port->dev,
2313 "%s - kmalloc(%d) failed.\n", __func__, 10);
2314 return -ENOMEM;
2315 }
2316
2317 currentCommand = buffer;
2318
2319 MAKE_CMD_EXT_CMD(¤tCommand, &length,
2320 edge_port->port->number - edge_port->port->serial->minor,
2321 command, param);
2322
2323 status = write_cmd_usb(edge_port, buffer, length);
2324 if (status) {
2325 /* something bad happened, let's free up the memory */
2326 kfree(buffer);
2327 }
2328
2329 return status;
2330}
2331
2332
2333/*****************************************************************************
2334 * write_cmd_usb
2335 * this function writes the given buffer out to the bulk write endpoint.
2336 *****************************************************************************/
2337static int write_cmd_usb(struct edgeport_port *edge_port,
2338 unsigned char *buffer, int length)
2339{
2340 struct edgeport_serial *edge_serial =
2341 usb_get_serial_data(edge_port->port->serial);
2342 int status = 0;
2343 struct urb *urb;
2344
2345 usb_serial_debug_data(debug, &edge_port->port->dev,
2346 __func__, length, buffer);
2347
2348 /* Allocate our next urb */
2349 urb = usb_alloc_urb(0, GFP_ATOMIC);
2350 if (!urb)
2351 return -ENOMEM;
2352
2353 atomic_inc(&CmdUrbs);
2354 dbg("%s - ALLOCATE URB %p (outstanding %d)",
2355 __func__, urb, atomic_read(&CmdUrbs));
2356
2357 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2358 usb_sndbulkpipe(edge_serial->serial->dev,
2359 edge_serial->bulk_out_endpoint),
2360 buffer, length, edge_bulk_out_cmd_callback, edge_port);
2361
2362 edge_port->commandPending = true;
2363 status = usb_submit_urb(urb, GFP_ATOMIC);
2364
2365 if (status) {
2366 /* something went wrong */
2367 dev_err(&edge_port->port->dev,
2368 "%s - usb_submit_urb(write command) failed, status = %d\n",
2369 __func__, status);
2370 usb_kill_urb(urb);
2371 usb_free_urb(urb);
2372 atomic_dec(&CmdUrbs);
2373 return status;
2374 }
2375
2376#if 0
2377 wait_event(&edge_port->wait_command, !edge_port->commandPending);
2378
2379 if (edge_port->commandPending) {
2380 /* command timed out */
2381 dbg("%s - command timed out", __func__);
2382 status = -EINVAL;
2383 }
2384#endif
2385 return status;
2386}
2387
2388
2389/*****************************************************************************
2390 * send_cmd_write_baud_rate
2391 * this function sends the proper command to change the baud rate of the
2392 * specified port.
2393 *****************************************************************************/
2394static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2395 int baudRate)
2396{
2397 struct edgeport_serial *edge_serial =
2398 usb_get_serial_data(edge_port->port->serial);
2399 unsigned char *cmdBuffer;
2400 unsigned char *currCmd;
2401 int cmdLen = 0;
2402 int divisor;
2403 int status;
2404 unsigned char number =
2405 edge_port->port->number - edge_port->port->serial->minor;
2406
2407 if (edge_serial->is_epic &&
2408 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2409 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d",
2410 edge_port->port->number, baudRate);
2411 return 0;
2412 }
2413
2414 dbg("%s - port = %d, baud = %d", __func__,
2415 edge_port->port->number, baudRate);
2416
2417 status = calc_baud_rate_divisor(baudRate, &divisor);
2418 if (status) {
2419 dev_err(&edge_port->port->dev, "%s - bad baud rate\n",
2420 __func__);
2421 return status;
2422 }
2423
2424 /* Alloc memory for the string of commands. */
2425 cmdBuffer = kmalloc(0x100, GFP_ATOMIC);
2426 if (!cmdBuffer) {
2427 dev_err(&edge_port->port->dev,
2428 "%s - kmalloc(%d) failed.\n", __func__, 0x100);
2429 return -ENOMEM;
2430 }
2431 currCmd = cmdBuffer;
2432
2433 /* Enable access to divisor latch */
2434 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2435
2436 /* Write the divisor itself */
2437 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2438 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2439
2440 /* Restore original value to disable access to divisor latch */
2441 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2442 edge_port->shadowLCR);
2443
2444 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2445 if (status) {
2446 /* something bad happened, let's free up the memory */
2447 kfree(cmdBuffer);
2448 }
2449
2450 return status;
2451}
2452
2453
2454/*****************************************************************************
2455 * calc_baud_rate_divisor
2456 * this function calculates the proper baud rate divisor for the specified
2457 * baud rate.
2458 *****************************************************************************/
2459static int calc_baud_rate_divisor(int baudrate, int *divisor)
2460{
2461 int i;
2462 __u16 custom;
2463
2464
2465 dbg("%s - %d", __func__, baudrate);
2466
2467 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2468 if (divisor_table[i].BaudRate == baudrate) {
2469 *divisor = divisor_table[i].Divisor;
2470 return 0;
2471 }
2472 }
2473
2474 /* We have tried all of the standard baud rates
2475 * lets try to calculate the divisor for this baud rate
2476 * Make sure the baud rate is reasonable */
2477 if (baudrate > 50 && baudrate < 230400) {
2478 /* get divisor */
2479 custom = (__u16)((230400L + baudrate/2) / baudrate);
2480
2481 *divisor = custom;
2482
2483 dbg("%s - Baud %d = %d", __func__, baudrate, custom);
2484 return 0;
2485 }
2486
2487 return -1;
2488}
2489
2490
2491/*****************************************************************************
2492 * send_cmd_write_uart_register
2493 * this function builds up a uart register message and sends to the device.
2494 *****************************************************************************/
2495static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2496 __u8 regNum, __u8 regValue)
2497{
2498 struct edgeport_serial *edge_serial =
2499 usb_get_serial_data(edge_port->port->serial);
2500 unsigned char *cmdBuffer;
2501 unsigned char *currCmd;
2502 unsigned long cmdLen = 0;
2503 int status;
2504
2505 dbg("%s - write to %s register 0x%02x",
2506 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2507
2508 if (edge_serial->is_epic &&
2509 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2510 regNum == MCR) {
2511 dbg("SendCmdWriteUartReg - Not writing to MCR Register");
2512 return 0;
2513 }
2514
2515 if (edge_serial->is_epic &&
2516 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2517 regNum == LCR) {
2518 dbg("SendCmdWriteUartReg - Not writing to LCR Register");
2519 return 0;
2520 }
2521
2522 /* Alloc memory for the string of commands. */
2523 cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2524 if (cmdBuffer == NULL)
2525 return -ENOMEM;
2526
2527 currCmd = cmdBuffer;
2528
2529 /* Build a cmd in the buffer to write the given register */
2530 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen,
2531 edge_port->port->number - edge_port->port->serial->minor,
2532 regNum, regValue);
2533
2534 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2535 if (status) {
2536 /* something bad happened, let's free up the memory */
2537 kfree(cmdBuffer);
2538 }
2539
2540 return status;
2541}
2542
2543
2544/*****************************************************************************
2545 * change_port_settings
2546 * This routine is called to set the UART on the device to match the
2547 * specified new settings.
2548 *****************************************************************************/
2549
2550static void change_port_settings(struct tty_struct *tty,
2551 struct edgeport_port *edge_port, struct ktermios *old_termios)
2552{
2553 struct edgeport_serial *edge_serial =
2554 usb_get_serial_data(edge_port->port->serial);
2555 int baud;
2556 unsigned cflag;
2557 __u8 mask = 0xff;
2558 __u8 lData;
2559 __u8 lParity;
2560 __u8 lStop;
2561 __u8 rxFlow;
2562 __u8 txFlow;
2563 int status;
2564
2565 dbg("%s - port %d", __func__, edge_port->port->number);
2566
2567 if (!edge_port->open &&
2568 !edge_port->openPending) {
2569 dbg("%s - port not opened", __func__);
2570 return;
2571 }
2572
2573 cflag = tty->termios->c_cflag;
2574
2575 switch (cflag & CSIZE) {
2576 case CS5:
2577 lData = LCR_BITS_5; mask = 0x1f;
2578 dbg("%s - data bits = 5", __func__);
2579 break;
2580 case CS6:
2581 lData = LCR_BITS_6; mask = 0x3f;
2582 dbg("%s - data bits = 6", __func__);
2583 break;
2584 case CS7:
2585 lData = LCR_BITS_7; mask = 0x7f;
2586 dbg("%s - data bits = 7", __func__);
2587 break;
2588 default:
2589 case CS8:
2590 lData = LCR_BITS_8;
2591 dbg("%s - data bits = 8", __func__);
2592 break;
2593 }
2594
2595 lParity = LCR_PAR_NONE;
2596 if (cflag & PARENB) {
2597 if (cflag & CMSPAR) {
2598 if (cflag & PARODD) {
2599 lParity = LCR_PAR_MARK;
2600 dbg("%s - parity = mark", __func__);
2601 } else {
2602 lParity = LCR_PAR_SPACE;
2603 dbg("%s - parity = space", __func__);
2604 }
2605 } else if (cflag & PARODD) {
2606 lParity = LCR_PAR_ODD;
2607 dbg("%s - parity = odd", __func__);
2608 } else {
2609 lParity = LCR_PAR_EVEN;
2610 dbg("%s - parity = even", __func__);
2611 }
2612 } else {
2613 dbg("%s - parity = none", __func__);
2614 }
2615
2616 if (cflag & CSTOPB) {
2617 lStop = LCR_STOP_2;
2618 dbg("%s - stop bits = 2", __func__);
2619 } else {
2620 lStop = LCR_STOP_1;
2621 dbg("%s - stop bits = 1", __func__);
2622 }
2623
2624 /* figure out the flow control settings */
2625 rxFlow = txFlow = 0x00;
2626 if (cflag & CRTSCTS) {
2627 rxFlow |= IOSP_RX_FLOW_RTS;
2628 txFlow |= IOSP_TX_FLOW_CTS;
2629 dbg("%s - RTS/CTS is enabled", __func__);
2630 } else {
2631 dbg("%s - RTS/CTS is disabled", __func__);
2632 }
2633
2634 /* if we are implementing XON/XOFF, set the start and stop character
2635 in the device */
2636 if (I_IXOFF(tty) || I_IXON(tty)) {
2637 unsigned char stop_char = STOP_CHAR(tty);
2638 unsigned char start_char = START_CHAR(tty);
2639
2640 if ((!edge_serial->is_epic) ||
2641 ((edge_serial->is_epic) &&
2642 (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2643 send_iosp_ext_cmd(edge_port,
2644 IOSP_CMD_SET_XON_CHAR, start_char);
2645 send_iosp_ext_cmd(edge_port,
2646 IOSP_CMD_SET_XOFF_CHAR, stop_char);
2647 }
2648
2649 /* if we are implementing INBOUND XON/XOFF */
2650 if (I_IXOFF(tty)) {
2651 rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2652 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2653 __func__, start_char, stop_char);
2654 } else {
2655 dbg("%s - INBOUND XON/XOFF is disabled", __func__);
2656 }
2657
2658 /* if we are implementing OUTBOUND XON/XOFF */
2659 if (I_IXON(tty)) {
2660 txFlow |= IOSP_TX_FLOW_XON_XOFF;
2661 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2662 __func__, start_char, stop_char);
2663 } else {
2664 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
2665 }
2666 }
2667
2668 /* Set flow control to the configured value */
2669 if ((!edge_serial->is_epic) ||
2670 ((edge_serial->is_epic) &&
2671 (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2672 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2673 if ((!edge_serial->is_epic) ||
2674 ((edge_serial->is_epic) &&
2675 (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2676 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2677
2678
2679 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2680 edge_port->shadowLCR |= (lData | lParity | lStop);
2681
2682 edge_port->validDataMask = mask;
2683
2684 /* Send the updated LCR value to the EdgePort */
2685 status = send_cmd_write_uart_register(edge_port, LCR,
2686 edge_port->shadowLCR);
2687 if (status != 0)
2688 return;
2689
2690 /* set up the MCR register and send it to the EdgePort */
2691 edge_port->shadowMCR = MCR_MASTER_IE;
2692 if (cflag & CBAUD)
2693 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2694
2695 status = send_cmd_write_uart_register(edge_port, MCR,
2696 edge_port->shadowMCR);
2697 if (status != 0)
2698 return;
2699
2700 /* Determine divisor based on baud rate */
2701 baud = tty_get_baud_rate(tty);
2702 if (!baud) {
2703 /* pick a default, any default... */
2704 baud = 9600;
2705 }
2706
2707 dbg("%s - baud rate = %d", __func__, baud);
2708 status = send_cmd_write_baud_rate(edge_port, baud);
2709 if (status == -1) {
2710 /* Speed change was not possible - put back the old speed */
2711 baud = tty_termios_baud_rate(old_termios);
2712 tty_encode_baud_rate(tty, baud, baud);
2713 }
2714}
2715
2716
2717/****************************************************************************
2718 * unicode_to_ascii
2719 * Turns a string from Unicode into ASCII.
2720 * Doesn't do a good job with any characters that are outside the normal
2721 * ASCII range, but it's only for debugging...
2722 * NOTE: expects the unicode in LE format
2723 ****************************************************************************/
2724static void unicode_to_ascii(char *string, int buflen,
2725 __le16 *unicode, int unicode_size)
2726{
2727 int i;
2728
2729 if (buflen <= 0) /* never happens, but... */
2730 return;
2731 --buflen; /* space for nul */
2732
2733 for (i = 0; i < unicode_size; i++) {
2734 if (i >= buflen)
2735 break;
2736 string[i] = (char)(le16_to_cpu(unicode[i]));
2737 }
2738 string[i] = 0x00;
2739}
2740
2741
2742/****************************************************************************
2743 * get_manufacturing_desc
2744 * reads in the manufacturing descriptor and stores it into the serial
2745 * structure.
2746 ****************************************************************************/
2747static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2748{
2749 int response;
2750
2751 dbg("getting manufacturer descriptor");
2752
2753 response = rom_read(edge_serial->serial,
2754 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2755 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2756 EDGE_MANUF_DESC_LEN,
2757 (__u8 *)(&edge_serial->manuf_descriptor));
2758
2759 if (response < 1)
2760 dev_err(&edge_serial->serial->dev->dev,
2761 "error in getting manufacturer descriptor\n");
2762 else {
2763 char string[30];
2764 dbg("**Manufacturer Descriptor");
2765 dbg(" RomSize: %dK",
2766 edge_serial->manuf_descriptor.RomSize);
2767 dbg(" RamSize: %dK",
2768 edge_serial->manuf_descriptor.RamSize);
2769 dbg(" CpuRev: %d",
2770 edge_serial->manuf_descriptor.CpuRev);
2771 dbg(" BoardRev: %d",
2772 edge_serial->manuf_descriptor.BoardRev);
2773 dbg(" NumPorts: %d",
2774 edge_serial->manuf_descriptor.NumPorts);
2775 dbg(" DescDate: %d/%d/%d",
2776 edge_serial->manuf_descriptor.DescDate[0],
2777 edge_serial->manuf_descriptor.DescDate[1],
2778 edge_serial->manuf_descriptor.DescDate[2]+1900);
2779 unicode_to_ascii(string, sizeof(string),
2780 edge_serial->manuf_descriptor.SerialNumber,
2781 edge_serial->manuf_descriptor.SerNumLength/2);
2782 dbg(" SerialNumber: %s", string);
2783 unicode_to_ascii(string, sizeof(string),
2784 edge_serial->manuf_descriptor.AssemblyNumber,
2785 edge_serial->manuf_descriptor.AssemblyNumLength/2);
2786 dbg(" AssemblyNumber: %s", string);
2787 unicode_to_ascii(string, sizeof(string),
2788 edge_serial->manuf_descriptor.OemAssyNumber,
2789 edge_serial->manuf_descriptor.OemAssyNumLength/2);
2790 dbg(" OemAssyNumber: %s", string);
2791 dbg(" UartType: %d",
2792 edge_serial->manuf_descriptor.UartType);
2793 dbg(" IonPid: %d",
2794 edge_serial->manuf_descriptor.IonPid);
2795 dbg(" IonConfig: %d",
2796 edge_serial->manuf_descriptor.IonConfig);
2797 }
2798}
2799
2800
2801/****************************************************************************
2802 * get_boot_desc
2803 * reads in the bootloader descriptor and stores it into the serial
2804 * structure.
2805 ****************************************************************************/
2806static void get_boot_desc(struct edgeport_serial *edge_serial)
2807{
2808 int response;
2809
2810 dbg("getting boot descriptor");
2811
2812 response = rom_read(edge_serial->serial,
2813 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2814 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2815 EDGE_BOOT_DESC_LEN,
2816 (__u8 *)(&edge_serial->boot_descriptor));
2817
2818 if (response < 1)
2819 dev_err(&edge_serial->serial->dev->dev,
2820 "error in getting boot descriptor\n");
2821 else {
2822 dbg("**Boot Descriptor:");
2823 dbg(" BootCodeLength: %d",
2824 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2825 dbg(" MajorVersion: %d",
2826 edge_serial->boot_descriptor.MajorVersion);
2827 dbg(" MinorVersion: %d",
2828 edge_serial->boot_descriptor.MinorVersion);
2829 dbg(" BuildNumber: %d",
2830 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2831 dbg(" Capabilities: 0x%x",
2832 le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2833 dbg(" UConfig0: %d",
2834 edge_serial->boot_descriptor.UConfig0);
2835 dbg(" UConfig1: %d",
2836 edge_serial->boot_descriptor.UConfig1);
2837 }
2838}
2839
2840
2841/****************************************************************************
2842 * load_application_firmware
2843 * This is called to load the application firmware to the device
2844 ****************************************************************************/
2845static void load_application_firmware(struct edgeport_serial *edge_serial)
2846{
2847 const struct ihex_binrec *rec;
2848 const struct firmware *fw;
2849 const char *fw_name;
2850 const char *fw_info;
2851 int response;
2852 __u32 Operaddr;
2853 __u16 build;
2854
2855 switch (edge_serial->product_info.iDownloadFile) {
2856 case EDGE_DOWNLOAD_FILE_I930:
2857 fw_info = "downloading firmware version (930)";
2858 fw_name = "edgeport/down.fw";
2859 break;
2860
2861 case EDGE_DOWNLOAD_FILE_80251:
2862 fw_info = "downloading firmware version (80251)";
2863 fw_name = "edgeport/down2.fw";
2864 break;
2865
2866 case EDGE_DOWNLOAD_FILE_NONE:
2867 dbg("No download file specified, skipping download");
2868 return;
2869
2870 default:
2871 return;
2872 }
2873
2874 response = request_ihex_firmware(&fw, fw_name,
2875 &edge_serial->serial->dev->dev);
2876 if (response) {
2877 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
2878 fw_name, response);
2879 return;
2880 }
2881
2882 rec = (const struct ihex_binrec *)fw->data;
2883 build = (rec->data[2] << 8) | rec->data[3];
2884
2885 dbg("%s %d.%d.%d", fw_info, rec->data[0], rec->data[1], build);
2886
2887 edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2888 edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2889 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2890
2891 for (rec = ihex_next_binrec(rec); rec;
2892 rec = ihex_next_binrec(rec)) {
2893 Operaddr = be32_to_cpu(rec->addr);
2894 response = sram_write(edge_serial->serial,
2895 Operaddr >> 16,
2896 Operaddr & 0xFFFF,
2897 be16_to_cpu(rec->len),
2898 &rec->data[0]);
2899 if (response < 0) {
2900 dev_err(&edge_serial->serial->dev->dev,
2901 "sram_write failed (%x, %x, %d)\n",
2902 Operaddr >> 16, Operaddr & 0xFFFF,
2903 be16_to_cpu(rec->len));
2904 break;
2905 }
2906 }
2907
2908 dbg("sending exec_dl_code");
2909 response = usb_control_msg (edge_serial->serial->dev,
2910 usb_sndctrlpipe(edge_serial->serial->dev, 0),
2911 USB_REQUEST_ION_EXEC_DL_CODE,
2912 0x40, 0x4000, 0x0001, NULL, 0, 3000);
2913
2914 release_firmware(fw);
2915}
2916
2917
2918/****************************************************************************
2919 * edge_startup
2920 ****************************************************************************/
2921static int edge_startup(struct usb_serial *serial)
2922{
2923 struct edgeport_serial *edge_serial;
2924 struct edgeport_port *edge_port;
2925 struct usb_device *dev;
2926 int i, j;
2927 int response;
2928 bool interrupt_in_found;
2929 bool bulk_in_found;
2930 bool bulk_out_found;
2931 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0,
2932 EDGE_COMPATIBILITY_MASK1,
2933 EDGE_COMPATIBILITY_MASK2 };
2934
2935 dev = serial->dev;
2936
2937 /* create our private serial structure */
2938 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2939 if (edge_serial == NULL) {
2940 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2941 return -ENOMEM;
2942 }
2943 spin_lock_init(&edge_serial->es_lock);
2944 edge_serial->serial = serial;
2945 usb_set_serial_data(serial, edge_serial);
2946
2947 /* get the name for the device from the device */
2948 i = usb_string(dev, dev->descriptor.iManufacturer,
2949 &edge_serial->name[0], MAX_NAME_LEN+1);
2950 if (i < 0)
2951 i = 0;
2952 edge_serial->name[i++] = ' ';
2953 usb_string(dev, dev->descriptor.iProduct,
2954 &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2955
2956 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2957
2958 /* Read the epic descriptor */
2959 if (get_epic_descriptor(edge_serial) <= 0) {
2960 /* memcpy descriptor to Supports structures */
2961 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2962 sizeof(struct edge_compatibility_bits));
2963
2964 /* get the manufacturing descriptor for this device */
2965 get_manufacturing_desc(edge_serial);
2966
2967 /* get the boot descriptor */
2968 get_boot_desc(edge_serial);
2969
2970 get_product_info(edge_serial);
2971 }
2972
2973 /* set the number of ports from the manufacturing description */
2974 /* serial->num_ports = serial->product_info.NumPorts; */
2975 if ((!edge_serial->is_epic) &&
2976 (edge_serial->product_info.NumPorts != serial->num_ports)) {
2977 dev_warn(&serial->dev->dev, "Device Reported %d serial ports "
2978 "vs. core thinking we have %d ports, email "
2979 "greg@kroah.com this information.\n",
2980 edge_serial->product_info.NumPorts,
2981 serial->num_ports);
2982 }
2983
2984 dbg("%s - time 1 %ld", __func__, jiffies);
2985
2986 /* If not an EPiC device */
2987 if (!edge_serial->is_epic) {
2988 /* now load the application firmware into this device */
2989 load_application_firmware(edge_serial);
2990
2991 dbg("%s - time 2 %ld", __func__, jiffies);
2992
2993 /* Check current Edgeport EEPROM and update if necessary */
2994 update_edgeport_E2PROM(edge_serial);
2995
2996 dbg("%s - time 3 %ld", __func__, jiffies);
2997
2998 /* set the configuration to use #1 */
2999/* dbg("set_configuration 1"); */
3000/* usb_set_configuration (dev, 1); */
3001 }
3002 dbg(" FirmwareMajorVersion %d.%d.%d",
3003 edge_serial->product_info.FirmwareMajorVersion,
3004 edge_serial->product_info.FirmwareMinorVersion,
3005 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
3006
3007 /* we set up the pointers to the endpoints in the edge_open function,
3008 * as the structures aren't created yet. */
3009
3010 /* set up our port private structures */
3011 for (i = 0; i < serial->num_ports; ++i) {
3012 edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL);
3013 if (edge_port == NULL) {
3014 dev_err(&serial->dev->dev, "%s - Out of memory\n",
3015 __func__);
3016 for (j = 0; j < i; ++j) {
3017 kfree(usb_get_serial_port_data(serial->port[j]));
3018 usb_set_serial_port_data(serial->port[j],
3019 NULL);
3020 }
3021 usb_set_serial_data(serial, NULL);
3022 kfree(edge_serial);
3023 return -ENOMEM;
3024 }
3025 spin_lock_init(&edge_port->ep_lock);
3026 edge_port->port = serial->port[i];
3027 usb_set_serial_port_data(serial->port[i], edge_port);
3028 }
3029
3030 response = 0;
3031
3032 if (edge_serial->is_epic) {
3033 /* EPIC thing, set up our interrupt polling now and our read
3034 * urb, so that the device knows it really is connected. */
3035 interrupt_in_found = bulk_in_found = bulk_out_found = false;
3036 for (i = 0; i < serial->interface->altsetting[0]
3037 .desc.bNumEndpoints; ++i) {
3038 struct usb_endpoint_descriptor *endpoint;
3039 int buffer_size;
3040
3041 endpoint = &serial->interface->altsetting[0].
3042 endpoint[i].desc;
3043 buffer_size = usb_endpoint_maxp(endpoint);
3044 if (!interrupt_in_found &&
3045 (usb_endpoint_is_int_in(endpoint))) {
3046 /* we found a interrupt in endpoint */
3047 dbg("found interrupt in");
3048
3049 /* not set up yet, so do it now */
3050 edge_serial->interrupt_read_urb =
3051 usb_alloc_urb(0, GFP_KERNEL);
3052 if (!edge_serial->interrupt_read_urb) {
3053 dev_err(&dev->dev, "out of memory\n");
3054 return -ENOMEM;
3055 }
3056 edge_serial->interrupt_in_buffer =
3057 kmalloc(buffer_size, GFP_KERNEL);
3058 if (!edge_serial->interrupt_in_buffer) {
3059 dev_err(&dev->dev, "out of memory\n");
3060 usb_free_urb(edge_serial->interrupt_read_urb);
3061 return -ENOMEM;
3062 }
3063 edge_serial->interrupt_in_endpoint =
3064 endpoint->bEndpointAddress;
3065
3066 /* set up our interrupt urb */
3067 usb_fill_int_urb(
3068 edge_serial->interrupt_read_urb,
3069 dev,
3070 usb_rcvintpipe(dev,
3071 endpoint->bEndpointAddress),
3072 edge_serial->interrupt_in_buffer,
3073 buffer_size,
3074 edge_interrupt_callback,
3075 edge_serial,
3076 endpoint->bInterval);
3077
3078 interrupt_in_found = true;
3079 }
3080
3081 if (!bulk_in_found &&
3082 (usb_endpoint_is_bulk_in(endpoint))) {
3083 /* we found a bulk in endpoint */
3084 dbg("found bulk in");
3085
3086 /* not set up yet, so do it now */
3087 edge_serial->read_urb =
3088 usb_alloc_urb(0, GFP_KERNEL);
3089 if (!edge_serial->read_urb) {
3090 dev_err(&dev->dev, "out of memory\n");
3091 return -ENOMEM;
3092 }
3093 edge_serial->bulk_in_buffer =
3094 kmalloc(buffer_size, GFP_KERNEL);
3095 if (!edge_serial->bulk_in_buffer) {
3096 dev_err(&dev->dev, "out of memory\n");
3097 usb_free_urb(edge_serial->read_urb);
3098 return -ENOMEM;
3099 }
3100 edge_serial->bulk_in_endpoint =
3101 endpoint->bEndpointAddress;
3102
3103 /* set up our bulk in urb */
3104 usb_fill_bulk_urb(edge_serial->read_urb, dev,
3105 usb_rcvbulkpipe(dev,
3106 endpoint->bEndpointAddress),
3107 edge_serial->bulk_in_buffer,
3108 usb_endpoint_maxp(endpoint),
3109 edge_bulk_in_callback,
3110 edge_serial);
3111 bulk_in_found = true;
3112 }
3113
3114 if (!bulk_out_found &&
3115 (usb_endpoint_is_bulk_out(endpoint))) {
3116 /* we found a bulk out endpoint */
3117 dbg("found bulk out");
3118 edge_serial->bulk_out_endpoint =
3119 endpoint->bEndpointAddress;
3120 bulk_out_found = true;
3121 }
3122 }
3123
3124 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
3125 dev_err(&dev->dev, "Error - the proper endpoints "
3126 "were not found!\n");
3127 return -ENODEV;
3128 }
3129
3130 /* start interrupt read for this edgeport this interrupt will
3131 * continue as long as the edgeport is connected */
3132 response = usb_submit_urb(edge_serial->interrupt_read_urb,
3133 GFP_KERNEL);
3134 if (response)
3135 dev_err(&dev->dev,
3136 "%s - Error %d submitting control urb\n",
3137 __func__, response);
3138 }
3139 return response;
3140}
3141
3142
3143/****************************************************************************
3144 * edge_disconnect
3145 * This function is called whenever the device is removed from the usb bus.
3146 ****************************************************************************/
3147static void edge_disconnect(struct usb_serial *serial)
3148{
3149 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3150
3151 dbg("%s", __func__);
3152
3153 /* stop reads and writes on all ports */
3154 /* free up our endpoint stuff */
3155 if (edge_serial->is_epic) {
3156 usb_kill_urb(edge_serial->interrupt_read_urb);
3157 usb_free_urb(edge_serial->interrupt_read_urb);
3158 kfree(edge_serial->interrupt_in_buffer);
3159
3160 usb_kill_urb(edge_serial->read_urb);
3161 usb_free_urb(edge_serial->read_urb);
3162 kfree(edge_serial->bulk_in_buffer);
3163 }
3164}
3165
3166
3167/****************************************************************************
3168 * edge_release
3169 * This function is called when the device structure is deallocated.
3170 ****************************************************************************/
3171static void edge_release(struct usb_serial *serial)
3172{
3173 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3174 int i;
3175
3176 dbg("%s", __func__);
3177
3178 for (i = 0; i < serial->num_ports; ++i)
3179 kfree(usb_get_serial_port_data(serial->port[i]));
3180
3181 kfree(edge_serial);
3182}
3183
3184module_usb_serial_driver(serial_drivers, id_table_combined);
3185
3186MODULE_AUTHOR(DRIVER_AUTHOR);
3187MODULE_DESCRIPTION(DRIVER_DESC);
3188MODULE_LICENSE("GPL");
3189MODULE_FIRMWARE("edgeport/boot.fw");
3190MODULE_FIRMWARE("edgeport/boot2.fw");
3191MODULE_FIRMWARE("edgeport/down.fw");
3192MODULE_FIRMWARE("edgeport/down2.fw");
3193
3194module_param(debug, bool, S_IRUGO | S_IWUSR);
3195MODULE_PARM_DESC(debug, "Debug enabled or not");