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1/******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
8 * Jan Dumon <j.dumon@option.com>
9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10 * <ajb@spheresystems.co.uk>
11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12 * Copyright (C) 2008 Novell, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 * USA
27 *
28 *
29 *****************************************************************************/
30
31/******************************************************************************
32 *
33 * Description of the device:
34 *
35 * Interface 0: Contains the IP network interface on the bulk end points.
36 * The multiplexed serial ports are using the interrupt and
37 * control endpoints.
38 * Interrupt contains a bitmap telling which multiplexed
39 * serialport needs servicing.
40 *
41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42 * port is opened, as this have a huge impact on the network port
43 * throughput.
44 *
45 * Interface 2: Standard modem interface - circuit switched interface, this
46 * can be used to make a standard ppp connection however it
47 * should not be used in conjunction with the IP network interface
48 * enabled for USB performance reasons i.e. if using this set
49 * ideally disable_net=1.
50 *
51 *****************************************************************************/
52
53#include <linux/sched.h>
54#include <linux/slab.h>
55#include <linux/init.h>
56#include <linux/delay.h>
57#include <linux/netdevice.h>
58#include <linux/module.h>
59#include <linux/ethtool.h>
60#include <linux/usb.h>
61#include <linux/timer.h>
62#include <linux/tty.h>
63#include <linux/tty_driver.h>
64#include <linux/tty_flip.h>
65#include <linux/kmod.h>
66#include <linux/rfkill.h>
67#include <linux/ip.h>
68#include <linux/uaccess.h>
69#include <linux/usb/cdc.h>
70#include <net/arp.h>
71#include <asm/byteorder.h>
72#include <linux/serial_core.h>
73#include <linux/serial.h>
74
75
76#define MOD_AUTHOR "Option Wireless"
77#define MOD_DESCRIPTION "USB High Speed Option driver"
78#define MOD_LICENSE "GPL"
79
80#define HSO_MAX_NET_DEVICES 10
81#define HSO__MAX_MTU 2048
82#define DEFAULT_MTU 1500
83#define DEFAULT_MRU 1500
84
85#define CTRL_URB_RX_SIZE 1024
86#define CTRL_URB_TX_SIZE 64
87
88#define BULK_URB_RX_SIZE 4096
89#define BULK_URB_TX_SIZE 8192
90
91#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
92#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
93#define MUX_BULK_RX_BUF_COUNT 4
94#define USB_TYPE_OPTION_VENDOR 0x20
95
96/* These definitions are used with the struct hso_net flags element */
97/* - use *_bit operations on it. (bit indices not values.) */
98#define HSO_NET_RUNNING 0
99
100#define HSO_NET_TX_TIMEOUT (HZ*10)
101
102#define HSO_SERIAL_MAGIC 0x48534f31
103
104/* Number of ttys to handle */
105#define HSO_SERIAL_TTY_MINORS 256
106
107#define MAX_RX_URBS 2
108
109static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
110{
111 if (tty)
112 return tty->driver_data;
113 return NULL;
114}
115
116/*****************************************************************************/
117/* Debugging functions */
118/*****************************************************************************/
119#define D__(lvl_, fmt, arg...) \
120 do { \
121 printk(lvl_ "[%d:%s]: " fmt "\n", \
122 __LINE__, __func__, ## arg); \
123 } while (0)
124
125#define D_(lvl, args...) \
126 do { \
127 if (lvl & debug) \
128 D__(KERN_INFO, args); \
129 } while (0)
130
131#define D1(args...) D_(0x01, ##args)
132#define D2(args...) D_(0x02, ##args)
133#define D3(args...) D_(0x04, ##args)
134#define D4(args...) D_(0x08, ##args)
135#define D5(args...) D_(0x10, ##args)
136
137/*****************************************************************************/
138/* Enumerators */
139/*****************************************************************************/
140enum pkt_parse_state {
141 WAIT_IP,
142 WAIT_DATA,
143 WAIT_SYNC
144};
145
146/*****************************************************************************/
147/* Structs */
148/*****************************************************************************/
149
150struct hso_shared_int {
151 struct usb_endpoint_descriptor *intr_endp;
152 void *shared_intr_buf;
153 struct urb *shared_intr_urb;
154 struct usb_device *usb;
155 int use_count;
156 int ref_count;
157 struct mutex shared_int_lock;
158};
159
160struct hso_net {
161 struct hso_device *parent;
162 struct net_device *net;
163 struct rfkill *rfkill;
164
165 struct usb_endpoint_descriptor *in_endp;
166 struct usb_endpoint_descriptor *out_endp;
167
168 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
169 struct urb *mux_bulk_tx_urb;
170 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
171 void *mux_bulk_tx_buf;
172
173 struct sk_buff *skb_rx_buf;
174 struct sk_buff *skb_tx_buf;
175
176 enum pkt_parse_state rx_parse_state;
177 spinlock_t net_lock;
178
179 unsigned short rx_buf_size;
180 unsigned short rx_buf_missing;
181 struct iphdr rx_ip_hdr;
182
183 unsigned long flags;
184};
185
186enum rx_ctrl_state{
187 RX_IDLE,
188 RX_SENT,
189 RX_PENDING
190};
191
192#define BM_REQUEST_TYPE (0xa1)
193#define B_NOTIFICATION (0x20)
194#define W_VALUE (0x0)
195#define W_INDEX (0x2)
196#define W_LENGTH (0x2)
197
198#define B_OVERRUN (0x1<<6)
199#define B_PARITY (0x1<<5)
200#define B_FRAMING (0x1<<4)
201#define B_RING_SIGNAL (0x1<<3)
202#define B_BREAK (0x1<<2)
203#define B_TX_CARRIER (0x1<<1)
204#define B_RX_CARRIER (0x1<<0)
205
206struct hso_serial_state_notification {
207 u8 bmRequestType;
208 u8 bNotification;
209 u16 wValue;
210 u16 wIndex;
211 u16 wLength;
212 u16 UART_state_bitmap;
213} __packed;
214
215struct hso_tiocmget {
216 struct mutex mutex;
217 wait_queue_head_t waitq;
218 int intr_completed;
219 struct usb_endpoint_descriptor *endp;
220 struct urb *urb;
221 struct hso_serial_state_notification serial_state_notification;
222 u16 prev_UART_state_bitmap;
223 struct uart_icount icount;
224};
225
226
227struct hso_serial {
228 struct hso_device *parent;
229 int magic;
230 u8 minor;
231
232 struct hso_shared_int *shared_int;
233
234 /* rx/tx urb could be either a bulk urb or a control urb depending
235 on which serial port it is used on. */
236 struct urb *rx_urb[MAX_RX_URBS];
237 u8 num_rx_urbs;
238 u8 *rx_data[MAX_RX_URBS];
239 u16 rx_data_length; /* should contain allocated length */
240
241 struct urb *tx_urb;
242 u8 *tx_data;
243 u8 *tx_buffer;
244 u16 tx_data_length; /* should contain allocated length */
245 u16 tx_data_count;
246 u16 tx_buffer_count;
247 struct usb_ctrlrequest ctrl_req_tx;
248 struct usb_ctrlrequest ctrl_req_rx;
249
250 struct usb_endpoint_descriptor *in_endp;
251 struct usb_endpoint_descriptor *out_endp;
252
253 enum rx_ctrl_state rx_state;
254 u8 rts_state;
255 u8 dtr_state;
256 unsigned tx_urb_used:1;
257
258 /* from usb_serial_port */
259 struct tty_struct *tty;
260 int open_count;
261 spinlock_t serial_lock;
262
263 int (*write_data) (struct hso_serial *serial);
264 struct hso_tiocmget *tiocmget;
265 /* Hacks required to get flow control
266 * working on the serial receive buffers
267 * so as not to drop characters on the floor.
268 */
269 int curr_rx_urb_idx;
270 u16 curr_rx_urb_offset;
271 u8 rx_urb_filled[MAX_RX_URBS];
272 struct tasklet_struct unthrottle_tasklet;
273 struct work_struct retry_unthrottle_workqueue;
274};
275
276struct hso_device {
277 union {
278 struct hso_serial *dev_serial;
279 struct hso_net *dev_net;
280 } port_data;
281
282 u32 port_spec;
283
284 u8 is_active;
285 u8 usb_gone;
286 struct work_struct async_get_intf;
287 struct work_struct async_put_intf;
288 struct work_struct reset_device;
289
290 struct usb_device *usb;
291 struct usb_interface *interface;
292
293 struct device *dev;
294 struct kref ref;
295 struct mutex mutex;
296};
297
298/* Type of interface */
299#define HSO_INTF_MASK 0xFF00
300#define HSO_INTF_MUX 0x0100
301#define HSO_INTF_BULK 0x0200
302
303/* Type of port */
304#define HSO_PORT_MASK 0xFF
305#define HSO_PORT_NO_PORT 0x0
306#define HSO_PORT_CONTROL 0x1
307#define HSO_PORT_APP 0x2
308#define HSO_PORT_GPS 0x3
309#define HSO_PORT_PCSC 0x4
310#define HSO_PORT_APP2 0x5
311#define HSO_PORT_GPS_CONTROL 0x6
312#define HSO_PORT_MSD 0x7
313#define HSO_PORT_VOICE 0x8
314#define HSO_PORT_DIAG2 0x9
315#define HSO_PORT_DIAG 0x10
316#define HSO_PORT_MODEM 0x11
317#define HSO_PORT_NETWORK 0x12
318
319/* Additional device info */
320#define HSO_INFO_MASK 0xFF000000
321#define HSO_INFO_CRC_BUG 0x01000000
322
323/*****************************************************************************/
324/* Prototypes */
325/*****************************************************************************/
326/* Serial driver functions */
327static int hso_serial_tiocmset(struct tty_struct *tty,
328 unsigned int set, unsigned int clear);
329static void ctrl_callback(struct urb *urb);
330static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
331static void hso_kick_transmit(struct hso_serial *serial);
332/* Helper functions */
333static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
334 struct usb_device *usb, gfp_t gfp);
335static void handle_usb_error(int status, const char *function,
336 struct hso_device *hso_dev);
337static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
338 int type, int dir);
339static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
340static void hso_free_interface(struct usb_interface *intf);
341static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
342static int hso_stop_serial_device(struct hso_device *hso_dev);
343static int hso_start_net_device(struct hso_device *hso_dev);
344static void hso_free_shared_int(struct hso_shared_int *shared_int);
345static int hso_stop_net_device(struct hso_device *hso_dev);
346static void hso_serial_ref_free(struct kref *ref);
347static void hso_std_serial_read_bulk_callback(struct urb *urb);
348static int hso_mux_serial_read(struct hso_serial *serial);
349static void async_get_intf(struct work_struct *data);
350static void async_put_intf(struct work_struct *data);
351static int hso_put_activity(struct hso_device *hso_dev);
352static int hso_get_activity(struct hso_device *hso_dev);
353static void tiocmget_intr_callback(struct urb *urb);
354static void reset_device(struct work_struct *data);
355/*****************************************************************************/
356/* Helping functions */
357/*****************************************************************************/
358
359/* #define DEBUG */
360
361static inline struct hso_net *dev2net(struct hso_device *hso_dev)
362{
363 return hso_dev->port_data.dev_net;
364}
365
366static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
367{
368 return hso_dev->port_data.dev_serial;
369}
370
371/* Debugging functions */
372#ifdef DEBUG
373static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
374 unsigned int len)
375{
376 static char name[255];
377
378 sprintf(name, "hso[%d:%s]", line_count, func_name);
379 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
380}
381
382#define DUMP(buf_, len_) \
383 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
384
385#define DUMP1(buf_, len_) \
386 do { \
387 if (0x01 & debug) \
388 DUMP(buf_, len_); \
389 } while (0)
390#else
391#define DUMP(buf_, len_)
392#define DUMP1(buf_, len_)
393#endif
394
395/* module parameters */
396static int debug;
397static int tty_major;
398static int disable_net;
399
400/* driver info */
401static const char driver_name[] = "hso";
402static const char tty_filename[] = "ttyHS";
403static const char *version = __FILE__ ": " MOD_AUTHOR;
404/* the usb driver itself (registered in hso_init) */
405static struct usb_driver hso_driver;
406/* serial structures */
407static struct tty_driver *tty_drv;
408static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
409static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
410static spinlock_t serial_table_lock;
411
412static const s32 default_port_spec[] = {
413 HSO_INTF_MUX | HSO_PORT_NETWORK,
414 HSO_INTF_BULK | HSO_PORT_DIAG,
415 HSO_INTF_BULK | HSO_PORT_MODEM,
416 0
417};
418
419static const s32 icon321_port_spec[] = {
420 HSO_INTF_MUX | HSO_PORT_NETWORK,
421 HSO_INTF_BULK | HSO_PORT_DIAG2,
422 HSO_INTF_BULK | HSO_PORT_MODEM,
423 HSO_INTF_BULK | HSO_PORT_DIAG,
424 0
425};
426
427#define default_port_device(vendor, product) \
428 USB_DEVICE(vendor, product), \
429 .driver_info = (kernel_ulong_t)default_port_spec
430
431#define icon321_port_device(vendor, product) \
432 USB_DEVICE(vendor, product), \
433 .driver_info = (kernel_ulong_t)icon321_port_spec
434
435/* list of devices we support */
436static const struct usb_device_id hso_ids[] = {
437 {default_port_device(0x0af0, 0x6711)},
438 {default_port_device(0x0af0, 0x6731)},
439 {default_port_device(0x0af0, 0x6751)},
440 {default_port_device(0x0af0, 0x6771)},
441 {default_port_device(0x0af0, 0x6791)},
442 {default_port_device(0x0af0, 0x6811)},
443 {default_port_device(0x0af0, 0x6911)},
444 {default_port_device(0x0af0, 0x6951)},
445 {default_port_device(0x0af0, 0x6971)},
446 {default_port_device(0x0af0, 0x7011)},
447 {default_port_device(0x0af0, 0x7031)},
448 {default_port_device(0x0af0, 0x7051)},
449 {default_port_device(0x0af0, 0x7071)},
450 {default_port_device(0x0af0, 0x7111)},
451 {default_port_device(0x0af0, 0x7211)},
452 {default_port_device(0x0af0, 0x7251)},
453 {default_port_device(0x0af0, 0x7271)},
454 {default_port_device(0x0af0, 0x7311)},
455 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
456 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
457 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
458 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
459 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
460 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
461 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
462 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
463 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
464 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
465 {USB_DEVICE(0x0af0, 0x7701)},
466 {USB_DEVICE(0x0af0, 0x7706)},
467 {USB_DEVICE(0x0af0, 0x7801)},
468 {USB_DEVICE(0x0af0, 0x7901)},
469 {USB_DEVICE(0x0af0, 0x7A01)},
470 {USB_DEVICE(0x0af0, 0x7A05)},
471 {USB_DEVICE(0x0af0, 0x8200)},
472 {USB_DEVICE(0x0af0, 0x8201)},
473 {USB_DEVICE(0x0af0, 0x8300)},
474 {USB_DEVICE(0x0af0, 0x8302)},
475 {USB_DEVICE(0x0af0, 0x8304)},
476 {USB_DEVICE(0x0af0, 0x8400)},
477 {USB_DEVICE(0x0af0, 0x8600)},
478 {USB_DEVICE(0x0af0, 0x8800)},
479 {USB_DEVICE(0x0af0, 0x8900)},
480 {USB_DEVICE(0x0af0, 0x9000)},
481 {USB_DEVICE(0x0af0, 0xd035)},
482 {USB_DEVICE(0x0af0, 0xd055)},
483 {USB_DEVICE(0x0af0, 0xd155)},
484 {USB_DEVICE(0x0af0, 0xd255)},
485 {USB_DEVICE(0x0af0, 0xd057)},
486 {USB_DEVICE(0x0af0, 0xd157)},
487 {USB_DEVICE(0x0af0, 0xd257)},
488 {USB_DEVICE(0x0af0, 0xd357)},
489 {USB_DEVICE(0x0af0, 0xd058)},
490 {USB_DEVICE(0x0af0, 0xc100)},
491 {}
492};
493MODULE_DEVICE_TABLE(usb, hso_ids);
494
495/* Sysfs attribute */
496static ssize_t hso_sysfs_show_porttype(struct device *dev,
497 struct device_attribute *attr,
498 char *buf)
499{
500 struct hso_device *hso_dev = dev_get_drvdata(dev);
501 char *port_name;
502
503 if (!hso_dev)
504 return 0;
505
506 switch (hso_dev->port_spec & HSO_PORT_MASK) {
507 case HSO_PORT_CONTROL:
508 port_name = "Control";
509 break;
510 case HSO_PORT_APP:
511 port_name = "Application";
512 break;
513 case HSO_PORT_APP2:
514 port_name = "Application2";
515 break;
516 case HSO_PORT_GPS:
517 port_name = "GPS";
518 break;
519 case HSO_PORT_GPS_CONTROL:
520 port_name = "GPS Control";
521 break;
522 case HSO_PORT_PCSC:
523 port_name = "PCSC";
524 break;
525 case HSO_PORT_DIAG:
526 port_name = "Diagnostic";
527 break;
528 case HSO_PORT_DIAG2:
529 port_name = "Diagnostic2";
530 break;
531 case HSO_PORT_MODEM:
532 port_name = "Modem";
533 break;
534 case HSO_PORT_NETWORK:
535 port_name = "Network";
536 break;
537 default:
538 port_name = "Unknown";
539 break;
540 }
541
542 return sprintf(buf, "%s\n", port_name);
543}
544static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
545
546static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
547{
548 int idx;
549
550 for (idx = 0; idx < serial->num_rx_urbs; idx++)
551 if (serial->rx_urb[idx] == urb)
552 return idx;
553 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
554 return -1;
555}
556
557/* converts mux value to a port spec value */
558static u32 hso_mux_to_port(int mux)
559{
560 u32 result;
561
562 switch (mux) {
563 case 0x1:
564 result = HSO_PORT_CONTROL;
565 break;
566 case 0x2:
567 result = HSO_PORT_APP;
568 break;
569 case 0x4:
570 result = HSO_PORT_PCSC;
571 break;
572 case 0x8:
573 result = HSO_PORT_GPS;
574 break;
575 case 0x10:
576 result = HSO_PORT_APP2;
577 break;
578 default:
579 result = HSO_PORT_NO_PORT;
580 }
581 return result;
582}
583
584/* converts port spec value to a mux value */
585static u32 hso_port_to_mux(int port)
586{
587 u32 result;
588
589 switch (port & HSO_PORT_MASK) {
590 case HSO_PORT_CONTROL:
591 result = 0x0;
592 break;
593 case HSO_PORT_APP:
594 result = 0x1;
595 break;
596 case HSO_PORT_PCSC:
597 result = 0x2;
598 break;
599 case HSO_PORT_GPS:
600 result = 0x3;
601 break;
602 case HSO_PORT_APP2:
603 result = 0x4;
604 break;
605 default:
606 result = 0x0;
607 }
608 return result;
609}
610
611static struct hso_serial *get_serial_by_shared_int_and_type(
612 struct hso_shared_int *shared_int,
613 int mux)
614{
615 int i, port;
616
617 port = hso_mux_to_port(mux);
618
619 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
620 if (serial_table[i] &&
621 (dev2ser(serial_table[i])->shared_int == shared_int) &&
622 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
623 return dev2ser(serial_table[i]);
624 }
625 }
626
627 return NULL;
628}
629
630static struct hso_serial *get_serial_by_index(unsigned index)
631{
632 struct hso_serial *serial = NULL;
633 unsigned long flags;
634
635 spin_lock_irqsave(&serial_table_lock, flags);
636 if (serial_table[index])
637 serial = dev2ser(serial_table[index]);
638 spin_unlock_irqrestore(&serial_table_lock, flags);
639
640 return serial;
641}
642
643static int get_free_serial_index(void)
644{
645 int index;
646 unsigned long flags;
647
648 spin_lock_irqsave(&serial_table_lock, flags);
649 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
650 if (serial_table[index] == NULL) {
651 spin_unlock_irqrestore(&serial_table_lock, flags);
652 return index;
653 }
654 }
655 spin_unlock_irqrestore(&serial_table_lock, flags);
656
657 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
658 return -1;
659}
660
661static void set_serial_by_index(unsigned index, struct hso_serial *serial)
662{
663 unsigned long flags;
664
665 spin_lock_irqsave(&serial_table_lock, flags);
666 if (serial)
667 serial_table[index] = serial->parent;
668 else
669 serial_table[index] = NULL;
670 spin_unlock_irqrestore(&serial_table_lock, flags);
671}
672
673static void handle_usb_error(int status, const char *function,
674 struct hso_device *hso_dev)
675{
676 char *explanation;
677
678 switch (status) {
679 case -ENODEV:
680 explanation = "no device";
681 break;
682 case -ENOENT:
683 explanation = "endpoint not enabled";
684 break;
685 case -EPIPE:
686 explanation = "endpoint stalled";
687 break;
688 case -ENOSPC:
689 explanation = "not enough bandwidth";
690 break;
691 case -ESHUTDOWN:
692 explanation = "device disabled";
693 break;
694 case -EHOSTUNREACH:
695 explanation = "device suspended";
696 break;
697 case -EINVAL:
698 case -EAGAIN:
699 case -EFBIG:
700 case -EMSGSIZE:
701 explanation = "internal error";
702 break;
703 case -EILSEQ:
704 case -EPROTO:
705 case -ETIME:
706 case -ETIMEDOUT:
707 explanation = "protocol error";
708 if (hso_dev)
709 schedule_work(&hso_dev->reset_device);
710 break;
711 default:
712 explanation = "unknown status";
713 break;
714 }
715
716 /* log a meaningful explanation of an USB status */
717 D1("%s: received USB status - %s (%d)", function, explanation, status);
718}
719
720/* Network interface functions */
721
722/* called when net interface is brought up by ifconfig */
723static int hso_net_open(struct net_device *net)
724{
725 struct hso_net *odev = netdev_priv(net);
726 unsigned long flags = 0;
727
728 if (!odev) {
729 dev_err(&net->dev, "No net device !\n");
730 return -ENODEV;
731 }
732
733 odev->skb_tx_buf = NULL;
734
735 /* setup environment */
736 spin_lock_irqsave(&odev->net_lock, flags);
737 odev->rx_parse_state = WAIT_IP;
738 odev->rx_buf_size = 0;
739 odev->rx_buf_missing = sizeof(struct iphdr);
740 spin_unlock_irqrestore(&odev->net_lock, flags);
741
742 /* We are up and running. */
743 set_bit(HSO_NET_RUNNING, &odev->flags);
744 hso_start_net_device(odev->parent);
745
746 /* Tell the kernel we are ready to start receiving from it */
747 netif_start_queue(net);
748
749 return 0;
750}
751
752/* called when interface is brought down by ifconfig */
753static int hso_net_close(struct net_device *net)
754{
755 struct hso_net *odev = netdev_priv(net);
756
757 /* we don't need the queue anymore */
758 netif_stop_queue(net);
759 /* no longer running */
760 clear_bit(HSO_NET_RUNNING, &odev->flags);
761
762 hso_stop_net_device(odev->parent);
763
764 /* done */
765 return 0;
766}
767
768/* USB tells is xmit done, we should start the netqueue again */
769static void write_bulk_callback(struct urb *urb)
770{
771 struct hso_net *odev = urb->context;
772 int status = urb->status;
773
774 /* Sanity check */
775 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
776 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
777 return;
778 }
779
780 /* Do we still have a valid kernel network device? */
781 if (!netif_device_present(odev->net)) {
782 dev_err(&urb->dev->dev, "%s: net device not present\n",
783 __func__);
784 return;
785 }
786
787 /* log status, but don't act on it, we don't need to resubmit anything
788 * anyhow */
789 if (status)
790 handle_usb_error(status, __func__, odev->parent);
791
792 hso_put_activity(odev->parent);
793
794 /* Tell the network interface we are ready for another frame */
795 netif_wake_queue(odev->net);
796}
797
798/* called by kernel when we need to transmit a packet */
799static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
800 struct net_device *net)
801{
802 struct hso_net *odev = netdev_priv(net);
803 int result;
804
805 /* Tell the kernel, "No more frames 'til we are done with this one." */
806 netif_stop_queue(net);
807 if (hso_get_activity(odev->parent) == -EAGAIN) {
808 odev->skb_tx_buf = skb;
809 return NETDEV_TX_OK;
810 }
811
812 /* log if asked */
813 DUMP1(skb->data, skb->len);
814 /* Copy it from kernel memory to OUR memory */
815 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
816 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
817
818 /* Fill in the URB for shipping it out. */
819 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
820 odev->parent->usb,
821 usb_sndbulkpipe(odev->parent->usb,
822 odev->out_endp->
823 bEndpointAddress & 0x7F),
824 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
825 odev);
826
827 /* Deal with the Zero Length packet problem, I hope */
828 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
829
830 /* Send the URB on its merry way. */
831 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
832 if (result) {
833 dev_warn(&odev->parent->interface->dev,
834 "failed mux_bulk_tx_urb %d\n", result);
835 net->stats.tx_errors++;
836 netif_start_queue(net);
837 } else {
838 net->stats.tx_packets++;
839 net->stats.tx_bytes += skb->len;
840 }
841 dev_kfree_skb(skb);
842 /* we're done */
843 return NETDEV_TX_OK;
844}
845
846static const struct ethtool_ops ops = {
847 .get_link = ethtool_op_get_link
848};
849
850/* called when a packet did not ack after watchdogtimeout */
851static void hso_net_tx_timeout(struct net_device *net)
852{
853 struct hso_net *odev = netdev_priv(net);
854
855 if (!odev)
856 return;
857
858 /* Tell syslog we are hosed. */
859 dev_warn(&net->dev, "Tx timed out.\n");
860
861 /* Tear the waiting frame off the list */
862 if (odev->mux_bulk_tx_urb &&
863 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
864 usb_unlink_urb(odev->mux_bulk_tx_urb);
865
866 /* Update statistics */
867 net->stats.tx_errors++;
868}
869
870/* make a real packet from the received USB buffer */
871static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
872 unsigned int count, unsigned char is_eop)
873{
874 unsigned short temp_bytes;
875 unsigned short buffer_offset = 0;
876 unsigned short frame_len;
877 unsigned char *tmp_rx_buf;
878
879 /* log if needed */
880 D1("Rx %d bytes", count);
881 DUMP(ip_pkt, min(128, (int)count));
882
883 while (count) {
884 switch (odev->rx_parse_state) {
885 case WAIT_IP:
886 /* waiting for IP header. */
887 /* wanted bytes - size of ip header */
888 temp_bytes =
889 (count <
890 odev->rx_buf_missing) ? count : odev->
891 rx_buf_missing;
892
893 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
894 odev->rx_buf_size, ip_pkt + buffer_offset,
895 temp_bytes);
896
897 odev->rx_buf_size += temp_bytes;
898 buffer_offset += temp_bytes;
899 odev->rx_buf_missing -= temp_bytes;
900 count -= temp_bytes;
901
902 if (!odev->rx_buf_missing) {
903 /* header is complete allocate an sk_buffer and
904 * continue to WAIT_DATA */
905 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
906
907 if ((frame_len > DEFAULT_MRU) ||
908 (frame_len < sizeof(struct iphdr))) {
909 dev_err(&odev->net->dev,
910 "Invalid frame (%d) length\n",
911 frame_len);
912 odev->rx_parse_state = WAIT_SYNC;
913 continue;
914 }
915 /* Allocate an sk_buff */
916 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
917 frame_len);
918 if (!odev->skb_rx_buf) {
919 /* We got no receive buffer. */
920 D1("could not allocate memory");
921 odev->rx_parse_state = WAIT_SYNC;
922 return;
923 }
924
925 /* Copy what we got so far. make room for iphdr
926 * after tail. */
927 tmp_rx_buf =
928 skb_put(odev->skb_rx_buf,
929 sizeof(struct iphdr));
930 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
931 sizeof(struct iphdr));
932
933 /* ETH_HLEN */
934 odev->rx_buf_size = sizeof(struct iphdr);
935
936 /* Filip actually use .tot_len */
937 odev->rx_buf_missing =
938 frame_len - sizeof(struct iphdr);
939 odev->rx_parse_state = WAIT_DATA;
940 }
941 break;
942
943 case WAIT_DATA:
944 temp_bytes = (count < odev->rx_buf_missing)
945 ? count : odev->rx_buf_missing;
946
947 /* Copy the rest of the bytes that are left in the
948 * buffer into the waiting sk_buf. */
949 /* Make room for temp_bytes after tail. */
950 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
951 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
952
953 odev->rx_buf_missing -= temp_bytes;
954 count -= temp_bytes;
955 buffer_offset += temp_bytes;
956 odev->rx_buf_size += temp_bytes;
957 if (!odev->rx_buf_missing) {
958 /* Packet is complete. Inject into stack. */
959 /* We have IP packet here */
960 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
961 skb_reset_mac_header(odev->skb_rx_buf);
962
963 /* Ship it off to the kernel */
964 netif_rx(odev->skb_rx_buf);
965 /* No longer our buffer. */
966 odev->skb_rx_buf = NULL;
967
968 /* update out statistics */
969 odev->net->stats.rx_packets++;
970
971 odev->net->stats.rx_bytes += odev->rx_buf_size;
972
973 odev->rx_buf_size = 0;
974 odev->rx_buf_missing = sizeof(struct iphdr);
975 odev->rx_parse_state = WAIT_IP;
976 }
977 break;
978
979 case WAIT_SYNC:
980 D1(" W_S");
981 count = 0;
982 break;
983 default:
984 D1(" ");
985 count--;
986 break;
987 }
988 }
989
990 /* Recovery mechanism for WAIT_SYNC state. */
991 if (is_eop) {
992 if (odev->rx_parse_state == WAIT_SYNC) {
993 odev->rx_parse_state = WAIT_IP;
994 odev->rx_buf_size = 0;
995 odev->rx_buf_missing = sizeof(struct iphdr);
996 }
997 }
998}
999
1000static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
1001{
1002 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1003 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
1004
1005 if (((rest == 5) || (rest == 6)) &&
1006 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
1007 crc_check, 4)) {
1008 urb->actual_length -= 4;
1009 }
1010}
1011
1012/* Moving data from usb to kernel (in interrupt state) */
1013static void read_bulk_callback(struct urb *urb)
1014{
1015 struct hso_net *odev = urb->context;
1016 struct net_device *net;
1017 int result;
1018 int status = urb->status;
1019
1020 /* is al ok? (Filip: Who's Al ?) */
1021 if (status) {
1022 handle_usb_error(status, __func__, odev->parent);
1023 return;
1024 }
1025
1026 /* Sanity check */
1027 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1028 D1("BULK IN callback but driver is not active!");
1029 return;
1030 }
1031 usb_mark_last_busy(urb->dev);
1032
1033 net = odev->net;
1034
1035 if (!netif_device_present(net)) {
1036 /* Somebody killed our network interface... */
1037 return;
1038 }
1039
1040 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1041 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1042
1043 /* do we even have a packet? */
1044 if (urb->actual_length) {
1045 /* Handle the IP stream, add header and push it onto network
1046 * stack if the packet is complete. */
1047 spin_lock(&odev->net_lock);
1048 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1049 (urb->transfer_buffer_length >
1050 urb->actual_length) ? 1 : 0);
1051 spin_unlock(&odev->net_lock);
1052 }
1053
1054 /* We are done with this URB, resubmit it. Prep the USB to wait for
1055 * another frame. Reuse same as received. */
1056 usb_fill_bulk_urb(urb,
1057 odev->parent->usb,
1058 usb_rcvbulkpipe(odev->parent->usb,
1059 odev->in_endp->
1060 bEndpointAddress & 0x7F),
1061 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1062 read_bulk_callback, odev);
1063
1064 /* Give this to the USB subsystem so it can tell us when more data
1065 * arrives. */
1066 result = usb_submit_urb(urb, GFP_ATOMIC);
1067 if (result)
1068 dev_warn(&odev->parent->interface->dev,
1069 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1070 result);
1071}
1072
1073/* Serial driver functions */
1074
1075static void hso_init_termios(struct ktermios *termios)
1076{
1077 /*
1078 * The default requirements for this device are:
1079 */
1080 termios->c_iflag &=
1081 ~(IGNBRK /* disable ignore break */
1082 | BRKINT /* disable break causes interrupt */
1083 | PARMRK /* disable mark parity errors */
1084 | ISTRIP /* disable clear high bit of input characters */
1085 | INLCR /* disable translate NL to CR */
1086 | IGNCR /* disable ignore CR */
1087 | ICRNL /* disable translate CR to NL */
1088 | IXON); /* disable enable XON/XOFF flow control */
1089
1090 /* disable postprocess output characters */
1091 termios->c_oflag &= ~OPOST;
1092
1093 termios->c_lflag &=
1094 ~(ECHO /* disable echo input characters */
1095 | ECHONL /* disable echo new line */
1096 | ICANON /* disable erase, kill, werase, and rprnt
1097 special characters */
1098 | ISIG /* disable interrupt, quit, and suspend special
1099 characters */
1100 | IEXTEN); /* disable non-POSIX special characters */
1101
1102 termios->c_cflag &=
1103 ~(CSIZE /* no size */
1104 | PARENB /* disable parity bit */
1105 | CBAUD /* clear current baud rate */
1106 | CBAUDEX); /* clear current buad rate */
1107
1108 termios->c_cflag |= CS8; /* character size 8 bits */
1109
1110 /* baud rate 115200 */
1111 tty_termios_encode_baud_rate(termios, 115200, 115200);
1112}
1113
1114static void _hso_serial_set_termios(struct tty_struct *tty,
1115 struct ktermios *old)
1116{
1117 struct hso_serial *serial = get_serial_by_tty(tty);
1118 struct ktermios *termios;
1119
1120 if (!serial) {
1121 printk(KERN_ERR "%s: no tty structures", __func__);
1122 return;
1123 }
1124
1125 D4("port %d", serial->minor);
1126
1127 /*
1128 * Fix up unsupported bits
1129 */
1130 termios = tty->termios;
1131 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1132
1133 termios->c_cflag &=
1134 ~(CSIZE /* no size */
1135 | PARENB /* disable parity bit */
1136 | CBAUD /* clear current baud rate */
1137 | CBAUDEX); /* clear current buad rate */
1138
1139 termios->c_cflag |= CS8; /* character size 8 bits */
1140
1141 /* baud rate 115200 */
1142 tty_encode_baud_rate(tty, 115200, 115200);
1143}
1144
1145static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1146{
1147 int result;
1148 /* We are done with this URB, resubmit it. Prep the USB to wait for
1149 * another frame */
1150 usb_fill_bulk_urb(urb, serial->parent->usb,
1151 usb_rcvbulkpipe(serial->parent->usb,
1152 serial->in_endp->
1153 bEndpointAddress & 0x7F),
1154 urb->transfer_buffer, serial->rx_data_length,
1155 hso_std_serial_read_bulk_callback, serial);
1156 /* Give this to the USB subsystem so it can tell us when more data
1157 * arrives. */
1158 result = usb_submit_urb(urb, GFP_ATOMIC);
1159 if (result) {
1160 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1161 __func__, result);
1162 }
1163}
1164
1165
1166
1167
1168static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1169{
1170 int count;
1171 struct urb *curr_urb;
1172
1173 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1174 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1175 count = put_rxbuf_data(curr_urb, serial);
1176 if (count == -1)
1177 return;
1178 if (count == 0) {
1179 serial->curr_rx_urb_idx++;
1180 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1181 serial->curr_rx_urb_idx = 0;
1182 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1183 }
1184 }
1185}
1186
1187static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1188{
1189 int count = 0;
1190 struct urb *urb;
1191
1192 urb = serial->rx_urb[0];
1193 if (serial->open_count > 0) {
1194 count = put_rxbuf_data(urb, serial);
1195 if (count == -1)
1196 return;
1197 }
1198 /* Re issue a read as long as we receive data. */
1199
1200 if (count == 0 && ((urb->actual_length != 0) ||
1201 (serial->rx_state == RX_PENDING))) {
1202 serial->rx_state = RX_SENT;
1203 hso_mux_serial_read(serial);
1204 } else
1205 serial->rx_state = RX_IDLE;
1206}
1207
1208
1209/* read callback for Diag and CS port */
1210static void hso_std_serial_read_bulk_callback(struct urb *urb)
1211{
1212 struct hso_serial *serial = urb->context;
1213 int status = urb->status;
1214
1215 /* sanity check */
1216 if (!serial) {
1217 D1("serial == NULL");
1218 return;
1219 } else if (status) {
1220 handle_usb_error(status, __func__, serial->parent);
1221 return;
1222 }
1223
1224 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1225 D1("Actual length = %d\n", urb->actual_length);
1226 DUMP1(urb->transfer_buffer, urb->actual_length);
1227
1228 /* Anyone listening? */
1229 if (serial->open_count == 0)
1230 return;
1231
1232 if (status == 0) {
1233 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1234 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1235 /* Valid data, handle RX data */
1236 spin_lock(&serial->serial_lock);
1237 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1238 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1239 spin_unlock(&serial->serial_lock);
1240 } else if (status == -ENOENT || status == -ECONNRESET) {
1241 /* Unlinked - check for throttled port. */
1242 D2("Port %d, successfully unlinked urb", serial->minor);
1243 spin_lock(&serial->serial_lock);
1244 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1245 hso_resubmit_rx_bulk_urb(serial, urb);
1246 spin_unlock(&serial->serial_lock);
1247 } else {
1248 D2("Port %d, status = %d for read urb", serial->minor, status);
1249 return;
1250 }
1251}
1252
1253/*
1254 * This needs to be a tasklet otherwise we will
1255 * end up recursively calling this function.
1256 */
1257static void hso_unthrottle_tasklet(struct hso_serial *serial)
1258{
1259 unsigned long flags;
1260
1261 spin_lock_irqsave(&serial->serial_lock, flags);
1262 if ((serial->parent->port_spec & HSO_INTF_MUX))
1263 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1264 else
1265 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1266 spin_unlock_irqrestore(&serial->serial_lock, flags);
1267}
1268
1269static void hso_unthrottle(struct tty_struct *tty)
1270{
1271 struct hso_serial *serial = get_serial_by_tty(tty);
1272
1273 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1274}
1275
1276static void hso_unthrottle_workfunc(struct work_struct *work)
1277{
1278 struct hso_serial *serial =
1279 container_of(work, struct hso_serial,
1280 retry_unthrottle_workqueue);
1281 hso_unthrottle_tasklet(serial);
1282}
1283
1284/* open the requested serial port */
1285static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1286{
1287 struct hso_serial *serial = get_serial_by_index(tty->index);
1288 int result;
1289
1290 /* sanity check */
1291 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1292 WARN_ON(1);
1293 tty->driver_data = NULL;
1294 D1("Failed to open port");
1295 return -ENODEV;
1296 }
1297
1298 mutex_lock(&serial->parent->mutex);
1299 result = usb_autopm_get_interface(serial->parent->interface);
1300 if (result < 0)
1301 goto err_out;
1302
1303 D1("Opening %d", serial->minor);
1304 kref_get(&serial->parent->ref);
1305
1306 /* setup */
1307 spin_lock_irq(&serial->serial_lock);
1308 tty->driver_data = serial;
1309 tty_kref_put(serial->tty);
1310 serial->tty = tty_kref_get(tty);
1311 spin_unlock_irq(&serial->serial_lock);
1312
1313 /* check for port already opened, if not set the termios */
1314 serial->open_count++;
1315 if (serial->open_count == 1) {
1316 serial->rx_state = RX_IDLE;
1317 /* Force default termio settings */
1318 _hso_serial_set_termios(tty, NULL);
1319 tasklet_init(&serial->unthrottle_tasklet,
1320 (void (*)(unsigned long))hso_unthrottle_tasklet,
1321 (unsigned long)serial);
1322 INIT_WORK(&serial->retry_unthrottle_workqueue,
1323 hso_unthrottle_workfunc);
1324 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1325 if (result) {
1326 hso_stop_serial_device(serial->parent);
1327 serial->open_count--;
1328 kref_put(&serial->parent->ref, hso_serial_ref_free);
1329 }
1330 } else {
1331 D1("Port was already open");
1332 }
1333
1334 usb_autopm_put_interface(serial->parent->interface);
1335
1336 /* done */
1337 if (result)
1338 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1339err_out:
1340 mutex_unlock(&serial->parent->mutex);
1341 return result;
1342}
1343
1344/* close the requested serial port */
1345static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1346{
1347 struct hso_serial *serial = tty->driver_data;
1348 u8 usb_gone;
1349
1350 D1("Closing serial port");
1351
1352 /* Open failed, no close cleanup required */
1353 if (serial == NULL)
1354 return;
1355
1356 mutex_lock(&serial->parent->mutex);
1357 usb_gone = serial->parent->usb_gone;
1358
1359 if (!usb_gone)
1360 usb_autopm_get_interface(serial->parent->interface);
1361
1362 /* reset the rts and dtr */
1363 /* do the actual close */
1364 serial->open_count--;
1365
1366 if (serial->open_count <= 0) {
1367 serial->open_count = 0;
1368 spin_lock_irq(&serial->serial_lock);
1369 if (serial->tty == tty) {
1370 serial->tty->driver_data = NULL;
1371 serial->tty = NULL;
1372 tty_kref_put(tty);
1373 }
1374 spin_unlock_irq(&serial->serial_lock);
1375 if (!usb_gone)
1376 hso_stop_serial_device(serial->parent);
1377 tasklet_kill(&serial->unthrottle_tasklet);
1378 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1379 }
1380
1381 if (!usb_gone)
1382 usb_autopm_put_interface(serial->parent->interface);
1383
1384 mutex_unlock(&serial->parent->mutex);
1385
1386 kref_put(&serial->parent->ref, hso_serial_ref_free);
1387}
1388
1389/* close the requested serial port */
1390static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1391 int count)
1392{
1393 struct hso_serial *serial = get_serial_by_tty(tty);
1394 int space, tx_bytes;
1395 unsigned long flags;
1396
1397 /* sanity check */
1398 if (serial == NULL) {
1399 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1400 return -ENODEV;
1401 }
1402
1403 spin_lock_irqsave(&serial->serial_lock, flags);
1404
1405 space = serial->tx_data_length - serial->tx_buffer_count;
1406 tx_bytes = (count < space) ? count : space;
1407
1408 if (!tx_bytes)
1409 goto out;
1410
1411 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1412 serial->tx_buffer_count += tx_bytes;
1413
1414out:
1415 spin_unlock_irqrestore(&serial->serial_lock, flags);
1416
1417 hso_kick_transmit(serial);
1418 /* done */
1419 return tx_bytes;
1420}
1421
1422/* how much room is there for writing */
1423static int hso_serial_write_room(struct tty_struct *tty)
1424{
1425 struct hso_serial *serial = get_serial_by_tty(tty);
1426 int room;
1427 unsigned long flags;
1428
1429 spin_lock_irqsave(&serial->serial_lock, flags);
1430 room = serial->tx_data_length - serial->tx_buffer_count;
1431 spin_unlock_irqrestore(&serial->serial_lock, flags);
1432
1433 /* return free room */
1434 return room;
1435}
1436
1437/* setup the term */
1438static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1439{
1440 struct hso_serial *serial = get_serial_by_tty(tty);
1441 unsigned long flags;
1442
1443 if (old)
1444 D5("Termios called with: cflags new[%d] - old[%d]",
1445 tty->termios->c_cflag, old->c_cflag);
1446
1447 /* the actual setup */
1448 spin_lock_irqsave(&serial->serial_lock, flags);
1449 if (serial->open_count)
1450 _hso_serial_set_termios(tty, old);
1451 else
1452 tty->termios = old;
1453 spin_unlock_irqrestore(&serial->serial_lock, flags);
1454
1455 /* done */
1456}
1457
1458/* how many characters in the buffer */
1459static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1460{
1461 struct hso_serial *serial = get_serial_by_tty(tty);
1462 int chars;
1463 unsigned long flags;
1464
1465 /* sanity check */
1466 if (serial == NULL)
1467 return 0;
1468
1469 spin_lock_irqsave(&serial->serial_lock, flags);
1470 chars = serial->tx_buffer_count;
1471 spin_unlock_irqrestore(&serial->serial_lock, flags);
1472
1473 return chars;
1474}
1475static int tiocmget_submit_urb(struct hso_serial *serial,
1476 struct hso_tiocmget *tiocmget,
1477 struct usb_device *usb)
1478{
1479 int result;
1480
1481 if (serial->parent->usb_gone)
1482 return -ENODEV;
1483 usb_fill_int_urb(tiocmget->urb, usb,
1484 usb_rcvintpipe(usb,
1485 tiocmget->endp->
1486 bEndpointAddress & 0x7F),
1487 &tiocmget->serial_state_notification,
1488 sizeof(struct hso_serial_state_notification),
1489 tiocmget_intr_callback, serial,
1490 tiocmget->endp->bInterval);
1491 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1492 if (result) {
1493 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1494 result);
1495 }
1496 return result;
1497
1498}
1499
1500static void tiocmget_intr_callback(struct urb *urb)
1501{
1502 struct hso_serial *serial = urb->context;
1503 struct hso_tiocmget *tiocmget;
1504 int status = urb->status;
1505 u16 UART_state_bitmap, prev_UART_state_bitmap;
1506 struct uart_icount *icount;
1507 struct hso_serial_state_notification *serial_state_notification;
1508 struct usb_device *usb;
1509
1510 /* Sanity checks */
1511 if (!serial)
1512 return;
1513 if (status) {
1514 handle_usb_error(status, __func__, serial->parent);
1515 return;
1516 }
1517 tiocmget = serial->tiocmget;
1518 if (!tiocmget)
1519 return;
1520 usb = serial->parent->usb;
1521 serial_state_notification = &tiocmget->serial_state_notification;
1522 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1523 serial_state_notification->bNotification != B_NOTIFICATION ||
1524 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1525 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1526 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1527 dev_warn(&usb->dev,
1528 "hso received invalid serial state notification\n");
1529 DUMP(serial_state_notification,
1530 sizeof(struct hso_serial_state_notification));
1531 } else {
1532
1533 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1534 UART_state_bitmap);
1535 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1536 icount = &tiocmget->icount;
1537 spin_lock(&serial->serial_lock);
1538 if ((UART_state_bitmap & B_OVERRUN) !=
1539 (prev_UART_state_bitmap & B_OVERRUN))
1540 icount->parity++;
1541 if ((UART_state_bitmap & B_PARITY) !=
1542 (prev_UART_state_bitmap & B_PARITY))
1543 icount->parity++;
1544 if ((UART_state_bitmap & B_FRAMING) !=
1545 (prev_UART_state_bitmap & B_FRAMING))
1546 icount->frame++;
1547 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1548 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1549 icount->rng++;
1550 if ((UART_state_bitmap & B_BREAK) !=
1551 (prev_UART_state_bitmap & B_BREAK))
1552 icount->brk++;
1553 if ((UART_state_bitmap & B_TX_CARRIER) !=
1554 (prev_UART_state_bitmap & B_TX_CARRIER))
1555 icount->dsr++;
1556 if ((UART_state_bitmap & B_RX_CARRIER) !=
1557 (prev_UART_state_bitmap & B_RX_CARRIER))
1558 icount->dcd++;
1559 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1560 spin_unlock(&serial->serial_lock);
1561 tiocmget->intr_completed = 1;
1562 wake_up_interruptible(&tiocmget->waitq);
1563 }
1564 memset(serial_state_notification, 0,
1565 sizeof(struct hso_serial_state_notification));
1566 tiocmget_submit_urb(serial,
1567 tiocmget,
1568 serial->parent->usb);
1569}
1570
1571/*
1572 * next few functions largely stolen from drivers/serial/serial_core.c
1573 */
1574/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1575 * - mask passed in arg for lines of interest
1576 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1577 * Caller should use TIOCGICOUNT to see which one it was
1578 */
1579static int
1580hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1581{
1582 DECLARE_WAITQUEUE(wait, current);
1583 struct uart_icount cprev, cnow;
1584 struct hso_tiocmget *tiocmget;
1585 int ret;
1586
1587 tiocmget = serial->tiocmget;
1588 if (!tiocmget)
1589 return -ENOENT;
1590 /*
1591 * note the counters on entry
1592 */
1593 spin_lock_irq(&serial->serial_lock);
1594 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1595 spin_unlock_irq(&serial->serial_lock);
1596 add_wait_queue(&tiocmget->waitq, &wait);
1597 for (;;) {
1598 spin_lock_irq(&serial->serial_lock);
1599 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1600 spin_unlock_irq(&serial->serial_lock);
1601 set_current_state(TASK_INTERRUPTIBLE);
1602 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1603 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1604 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1605 ret = 0;
1606 break;
1607 }
1608 schedule();
1609 /* see if a signal did it */
1610 if (signal_pending(current)) {
1611 ret = -ERESTARTSYS;
1612 break;
1613 }
1614 cprev = cnow;
1615 }
1616 current->state = TASK_RUNNING;
1617 remove_wait_queue(&tiocmget->waitq, &wait);
1618
1619 return ret;
1620}
1621
1622/*
1623 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1624 * Return: write counters to the user passed counter struct
1625 * NB: both 1->0 and 0->1 transitions are counted except for
1626 * RI where only 0->1 is counted.
1627 */
1628static int hso_get_count(struct tty_struct *tty,
1629 struct serial_icounter_struct *icount)
1630{
1631 struct uart_icount cnow;
1632 struct hso_serial *serial = get_serial_by_tty(tty);
1633 struct hso_tiocmget *tiocmget = serial->tiocmget;
1634
1635 memset(&icount, 0, sizeof(struct serial_icounter_struct));
1636
1637 if (!tiocmget)
1638 return -ENOENT;
1639 spin_lock_irq(&serial->serial_lock);
1640 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1641 spin_unlock_irq(&serial->serial_lock);
1642
1643 icount->cts = cnow.cts;
1644 icount->dsr = cnow.dsr;
1645 icount->rng = cnow.rng;
1646 icount->dcd = cnow.dcd;
1647 icount->rx = cnow.rx;
1648 icount->tx = cnow.tx;
1649 icount->frame = cnow.frame;
1650 icount->overrun = cnow.overrun;
1651 icount->parity = cnow.parity;
1652 icount->brk = cnow.brk;
1653 icount->buf_overrun = cnow.buf_overrun;
1654
1655 return 0;
1656}
1657
1658
1659static int hso_serial_tiocmget(struct tty_struct *tty)
1660{
1661 int retval;
1662 struct hso_serial *serial = get_serial_by_tty(tty);
1663 struct hso_tiocmget *tiocmget;
1664 u16 UART_state_bitmap;
1665
1666 /* sanity check */
1667 if (!serial) {
1668 D1("no tty structures");
1669 return -EINVAL;
1670 }
1671 spin_lock_irq(&serial->serial_lock);
1672 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1673 ((serial->dtr_state) ? TIOCM_DTR : 0);
1674 tiocmget = serial->tiocmget;
1675 if (tiocmget) {
1676
1677 UART_state_bitmap = le16_to_cpu(
1678 tiocmget->prev_UART_state_bitmap);
1679 if (UART_state_bitmap & B_RING_SIGNAL)
1680 retval |= TIOCM_RNG;
1681 if (UART_state_bitmap & B_RX_CARRIER)
1682 retval |= TIOCM_CD;
1683 if (UART_state_bitmap & B_TX_CARRIER)
1684 retval |= TIOCM_DSR;
1685 }
1686 spin_unlock_irq(&serial->serial_lock);
1687 return retval;
1688}
1689
1690static int hso_serial_tiocmset(struct tty_struct *tty,
1691 unsigned int set, unsigned int clear)
1692{
1693 int val = 0;
1694 unsigned long flags;
1695 int if_num;
1696 struct hso_serial *serial = get_serial_by_tty(tty);
1697
1698 /* sanity check */
1699 if (!serial) {
1700 D1("no tty structures");
1701 return -EINVAL;
1702 }
1703
1704 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1705 return -EINVAL;
1706
1707 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1708
1709 spin_lock_irqsave(&serial->serial_lock, flags);
1710 if (set & TIOCM_RTS)
1711 serial->rts_state = 1;
1712 if (set & TIOCM_DTR)
1713 serial->dtr_state = 1;
1714
1715 if (clear & TIOCM_RTS)
1716 serial->rts_state = 0;
1717 if (clear & TIOCM_DTR)
1718 serial->dtr_state = 0;
1719
1720 if (serial->dtr_state)
1721 val |= 0x01;
1722 if (serial->rts_state)
1723 val |= 0x02;
1724
1725 spin_unlock_irqrestore(&serial->serial_lock, flags);
1726
1727 return usb_control_msg(serial->parent->usb,
1728 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1729 0x21, val, if_num, NULL, 0,
1730 USB_CTRL_SET_TIMEOUT);
1731}
1732
1733static int hso_serial_ioctl(struct tty_struct *tty,
1734 unsigned int cmd, unsigned long arg)
1735{
1736 struct hso_serial *serial = get_serial_by_tty(tty);
1737 int ret = 0;
1738 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1739
1740 if (!serial)
1741 return -ENODEV;
1742 switch (cmd) {
1743 case TIOCMIWAIT:
1744 ret = hso_wait_modem_status(serial, arg);
1745 break;
1746 default:
1747 ret = -ENOIOCTLCMD;
1748 break;
1749 }
1750 return ret;
1751}
1752
1753
1754/* starts a transmit */
1755static void hso_kick_transmit(struct hso_serial *serial)
1756{
1757 u8 *temp;
1758 unsigned long flags;
1759 int res;
1760
1761 spin_lock_irqsave(&serial->serial_lock, flags);
1762 if (!serial->tx_buffer_count)
1763 goto out;
1764
1765 if (serial->tx_urb_used)
1766 goto out;
1767
1768 /* Wakeup USB interface if necessary */
1769 if (hso_get_activity(serial->parent) == -EAGAIN)
1770 goto out;
1771
1772 /* Switch pointers around to avoid memcpy */
1773 temp = serial->tx_buffer;
1774 serial->tx_buffer = serial->tx_data;
1775 serial->tx_data = temp;
1776 serial->tx_data_count = serial->tx_buffer_count;
1777 serial->tx_buffer_count = 0;
1778
1779 /* If temp is set, it means we switched buffers */
1780 if (temp && serial->write_data) {
1781 res = serial->write_data(serial);
1782 if (res >= 0)
1783 serial->tx_urb_used = 1;
1784 }
1785out:
1786 spin_unlock_irqrestore(&serial->serial_lock, flags);
1787}
1788
1789/* make a request (for reading and writing data to muxed serial port) */
1790static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1791 struct urb *ctrl_urb,
1792 struct usb_ctrlrequest *ctrl_req,
1793 u8 *ctrl_urb_data, u32 size)
1794{
1795 int result;
1796 int pipe;
1797
1798 /* Sanity check */
1799 if (!serial || !ctrl_urb || !ctrl_req) {
1800 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1801 return -EINVAL;
1802 }
1803
1804 /* initialize */
1805 ctrl_req->wValue = 0;
1806 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1807 ctrl_req->wLength = cpu_to_le16(size);
1808
1809 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1810 /* Reading command */
1811 ctrl_req->bRequestType = USB_DIR_IN |
1812 USB_TYPE_OPTION_VENDOR |
1813 USB_RECIP_INTERFACE;
1814 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1815 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1816 } else {
1817 /* Writing command */
1818 ctrl_req->bRequestType = USB_DIR_OUT |
1819 USB_TYPE_OPTION_VENDOR |
1820 USB_RECIP_INTERFACE;
1821 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1822 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1823 }
1824 /* syslog */
1825 D2("%s command (%02x) len: %d, port: %d",
1826 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1827 ctrl_req->bRequestType, ctrl_req->wLength, port);
1828
1829 /* Load ctrl urb */
1830 ctrl_urb->transfer_flags = 0;
1831 usb_fill_control_urb(ctrl_urb,
1832 serial->parent->usb,
1833 pipe,
1834 (u8 *) ctrl_req,
1835 ctrl_urb_data, size, ctrl_callback, serial);
1836 /* Send it on merry way */
1837 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1838 if (result) {
1839 dev_err(&ctrl_urb->dev->dev,
1840 "%s failed submit ctrl_urb %d type %d\n", __func__,
1841 result, type);
1842 return result;
1843 }
1844
1845 /* done */
1846 return size;
1847}
1848
1849/* called by intr_callback when read occurs */
1850static int hso_mux_serial_read(struct hso_serial *serial)
1851{
1852 if (!serial)
1853 return -EINVAL;
1854
1855 /* clean data */
1856 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1857 /* make the request */
1858
1859 if (serial->num_rx_urbs != 1) {
1860 dev_err(&serial->parent->interface->dev,
1861 "ERROR: mux'd reads with multiple buffers "
1862 "not possible\n");
1863 return 0;
1864 }
1865 return mux_device_request(serial,
1866 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1867 serial->parent->port_spec & HSO_PORT_MASK,
1868 serial->rx_urb[0],
1869 &serial->ctrl_req_rx,
1870 serial->rx_data[0], serial->rx_data_length);
1871}
1872
1873/* used for muxed serial port callback (muxed serial read) */
1874static void intr_callback(struct urb *urb)
1875{
1876 struct hso_shared_int *shared_int = urb->context;
1877 struct hso_serial *serial;
1878 unsigned char *port_req;
1879 int status = urb->status;
1880 int i;
1881
1882 usb_mark_last_busy(urb->dev);
1883
1884 /* sanity check */
1885 if (!shared_int)
1886 return;
1887
1888 /* status check */
1889 if (status) {
1890 handle_usb_error(status, __func__, NULL);
1891 return;
1892 }
1893 D4("\n--- Got intr callback 0x%02X ---", status);
1894
1895 /* what request? */
1896 port_req = urb->transfer_buffer;
1897 D4(" port_req = 0x%.2X\n", *port_req);
1898 /* loop over all muxed ports to find the one sending this */
1899 for (i = 0; i < 8; i++) {
1900 /* max 8 channels on MUX */
1901 if (*port_req & (1 << i)) {
1902 serial = get_serial_by_shared_int_and_type(shared_int,
1903 (1 << i));
1904 if (serial != NULL) {
1905 D1("Pending read interrupt on port %d\n", i);
1906 spin_lock(&serial->serial_lock);
1907 if (serial->rx_state == RX_IDLE &&
1908 serial->open_count > 0) {
1909 /* Setup and send a ctrl req read on
1910 * port i */
1911 if (!serial->rx_urb_filled[0]) {
1912 serial->rx_state = RX_SENT;
1913 hso_mux_serial_read(serial);
1914 } else
1915 serial->rx_state = RX_PENDING;
1916 } else {
1917 D1("Already a read pending on "
1918 "port %d or port not open\n", i);
1919 }
1920 spin_unlock(&serial->serial_lock);
1921 }
1922 }
1923 }
1924 /* Resubmit interrupt urb */
1925 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1926}
1927
1928/* called for writing to muxed serial port */
1929static int hso_mux_serial_write_data(struct hso_serial *serial)
1930{
1931 if (NULL == serial)
1932 return -EINVAL;
1933
1934 return mux_device_request(serial,
1935 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1936 serial->parent->port_spec & HSO_PORT_MASK,
1937 serial->tx_urb,
1938 &serial->ctrl_req_tx,
1939 serial->tx_data, serial->tx_data_count);
1940}
1941
1942/* write callback for Diag and CS port */
1943static void hso_std_serial_write_bulk_callback(struct urb *urb)
1944{
1945 struct hso_serial *serial = urb->context;
1946 int status = urb->status;
1947 struct tty_struct *tty;
1948
1949 /* sanity check */
1950 if (!serial) {
1951 D1("serial == NULL");
1952 return;
1953 }
1954
1955 spin_lock(&serial->serial_lock);
1956 serial->tx_urb_used = 0;
1957 tty = tty_kref_get(serial->tty);
1958 spin_unlock(&serial->serial_lock);
1959 if (status) {
1960 handle_usb_error(status, __func__, serial->parent);
1961 tty_kref_put(tty);
1962 return;
1963 }
1964 hso_put_activity(serial->parent);
1965 if (tty) {
1966 tty_wakeup(tty);
1967 tty_kref_put(tty);
1968 }
1969 hso_kick_transmit(serial);
1970
1971 D1(" ");
1972}
1973
1974/* called for writing diag or CS serial port */
1975static int hso_std_serial_write_data(struct hso_serial *serial)
1976{
1977 int count = serial->tx_data_count;
1978 int result;
1979
1980 usb_fill_bulk_urb(serial->tx_urb,
1981 serial->parent->usb,
1982 usb_sndbulkpipe(serial->parent->usb,
1983 serial->out_endp->
1984 bEndpointAddress & 0x7F),
1985 serial->tx_data, serial->tx_data_count,
1986 hso_std_serial_write_bulk_callback, serial);
1987
1988 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1989 if (result) {
1990 dev_warn(&serial->parent->usb->dev,
1991 "Failed to submit urb - res %d\n", result);
1992 return result;
1993 }
1994
1995 return count;
1996}
1997
1998/* callback after read or write on muxed serial port */
1999static void ctrl_callback(struct urb *urb)
2000{
2001 struct hso_serial *serial = urb->context;
2002 struct usb_ctrlrequest *req;
2003 int status = urb->status;
2004 struct tty_struct *tty;
2005
2006 /* sanity check */
2007 if (!serial)
2008 return;
2009
2010 spin_lock(&serial->serial_lock);
2011 serial->tx_urb_used = 0;
2012 tty = tty_kref_get(serial->tty);
2013 spin_unlock(&serial->serial_lock);
2014 if (status) {
2015 handle_usb_error(status, __func__, serial->parent);
2016 tty_kref_put(tty);
2017 return;
2018 }
2019
2020 /* what request? */
2021 req = (struct usb_ctrlrequest *)(urb->setup_packet);
2022 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2023 D4("Actual length of urb = %d\n", urb->actual_length);
2024 DUMP1(urb->transfer_buffer, urb->actual_length);
2025
2026 if (req->bRequestType ==
2027 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2028 /* response to a read command */
2029 serial->rx_urb_filled[0] = 1;
2030 spin_lock(&serial->serial_lock);
2031 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2032 spin_unlock(&serial->serial_lock);
2033 } else {
2034 hso_put_activity(serial->parent);
2035 if (tty)
2036 tty_wakeup(tty);
2037 /* response to a write command */
2038 hso_kick_transmit(serial);
2039 }
2040 tty_kref_put(tty);
2041}
2042
2043/* handle RX data for serial port */
2044static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2045{
2046 struct tty_struct *tty;
2047 int write_length_remaining = 0;
2048 int curr_write_len;
2049
2050 /* Sanity check */
2051 if (urb == NULL || serial == NULL) {
2052 D1("serial = NULL");
2053 return -2;
2054 }
2055
2056 /* All callers to put_rxbuf_data hold serial_lock */
2057 tty = tty_kref_get(serial->tty);
2058
2059 /* Push data to tty */
2060 if (tty) {
2061 write_length_remaining = urb->actual_length -
2062 serial->curr_rx_urb_offset;
2063 D1("data to push to tty");
2064 while (write_length_remaining) {
2065 if (test_bit(TTY_THROTTLED, &tty->flags)) {
2066 tty_kref_put(tty);
2067 return -1;
2068 }
2069 curr_write_len = tty_insert_flip_string
2070 (tty, urb->transfer_buffer +
2071 serial->curr_rx_urb_offset,
2072 write_length_remaining);
2073 serial->curr_rx_urb_offset += curr_write_len;
2074 write_length_remaining -= curr_write_len;
2075 tty_flip_buffer_push(tty);
2076 }
2077 }
2078 if (write_length_remaining == 0) {
2079 serial->curr_rx_urb_offset = 0;
2080 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2081 }
2082 tty_kref_put(tty);
2083 return write_length_remaining;
2084}
2085
2086
2087/* Base driver functions */
2088
2089static void hso_log_port(struct hso_device *hso_dev)
2090{
2091 char *port_type;
2092 char port_dev[20];
2093
2094 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2095 case HSO_PORT_CONTROL:
2096 port_type = "Control";
2097 break;
2098 case HSO_PORT_APP:
2099 port_type = "Application";
2100 break;
2101 case HSO_PORT_GPS:
2102 port_type = "GPS";
2103 break;
2104 case HSO_PORT_GPS_CONTROL:
2105 port_type = "GPS control";
2106 break;
2107 case HSO_PORT_APP2:
2108 port_type = "Application2";
2109 break;
2110 case HSO_PORT_PCSC:
2111 port_type = "PCSC";
2112 break;
2113 case HSO_PORT_DIAG:
2114 port_type = "Diagnostic";
2115 break;
2116 case HSO_PORT_DIAG2:
2117 port_type = "Diagnostic2";
2118 break;
2119 case HSO_PORT_MODEM:
2120 port_type = "Modem";
2121 break;
2122 case HSO_PORT_NETWORK:
2123 port_type = "Network";
2124 break;
2125 default:
2126 port_type = "Unknown";
2127 break;
2128 }
2129 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2130 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2131 } else
2132 sprintf(port_dev, "/dev/%s%d", tty_filename,
2133 dev2ser(hso_dev)->minor);
2134
2135 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2136 port_type, port_dev);
2137}
2138
2139static int hso_start_net_device(struct hso_device *hso_dev)
2140{
2141 int i, result = 0;
2142 struct hso_net *hso_net = dev2net(hso_dev);
2143
2144 if (!hso_net)
2145 return -ENODEV;
2146
2147 /* send URBs for all read buffers */
2148 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2149
2150 /* Prep a receive URB */
2151 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2152 hso_dev->usb,
2153 usb_rcvbulkpipe(hso_dev->usb,
2154 hso_net->in_endp->
2155 bEndpointAddress & 0x7F),
2156 hso_net->mux_bulk_rx_buf_pool[i],
2157 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2158 hso_net);
2159
2160 /* Put it out there so the device can send us stuff */
2161 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2162 GFP_NOIO);
2163 if (result)
2164 dev_warn(&hso_dev->usb->dev,
2165 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2166 i, result);
2167 }
2168
2169 return result;
2170}
2171
2172static int hso_stop_net_device(struct hso_device *hso_dev)
2173{
2174 int i;
2175 struct hso_net *hso_net = dev2net(hso_dev);
2176
2177 if (!hso_net)
2178 return -ENODEV;
2179
2180 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2181 if (hso_net->mux_bulk_rx_urb_pool[i])
2182 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2183
2184 }
2185 if (hso_net->mux_bulk_tx_urb)
2186 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2187
2188 return 0;
2189}
2190
2191static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2192{
2193 int i, result = 0;
2194 struct hso_serial *serial = dev2ser(hso_dev);
2195
2196 if (!serial)
2197 return -ENODEV;
2198
2199 /* If it is not the MUX port fill in and submit a bulk urb (already
2200 * allocated in hso_serial_start) */
2201 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2202 for (i = 0; i < serial->num_rx_urbs; i++) {
2203 usb_fill_bulk_urb(serial->rx_urb[i],
2204 serial->parent->usb,
2205 usb_rcvbulkpipe(serial->parent->usb,
2206 serial->in_endp->
2207 bEndpointAddress &
2208 0x7F),
2209 serial->rx_data[i],
2210 serial->rx_data_length,
2211 hso_std_serial_read_bulk_callback,
2212 serial);
2213 result = usb_submit_urb(serial->rx_urb[i], flags);
2214 if (result) {
2215 dev_warn(&serial->parent->usb->dev,
2216 "Failed to submit urb - res %d\n",
2217 result);
2218 break;
2219 }
2220 }
2221 } else {
2222 mutex_lock(&serial->shared_int->shared_int_lock);
2223 if (!serial->shared_int->use_count) {
2224 result =
2225 hso_mux_submit_intr_urb(serial->shared_int,
2226 hso_dev->usb, flags);
2227 }
2228 serial->shared_int->use_count++;
2229 mutex_unlock(&serial->shared_int->shared_int_lock);
2230 }
2231 if (serial->tiocmget)
2232 tiocmget_submit_urb(serial,
2233 serial->tiocmget,
2234 serial->parent->usb);
2235 return result;
2236}
2237
2238static int hso_stop_serial_device(struct hso_device *hso_dev)
2239{
2240 int i;
2241 struct hso_serial *serial = dev2ser(hso_dev);
2242 struct hso_tiocmget *tiocmget;
2243
2244 if (!serial)
2245 return -ENODEV;
2246
2247 for (i = 0; i < serial->num_rx_urbs; i++) {
2248 if (serial->rx_urb[i]) {
2249 usb_kill_urb(serial->rx_urb[i]);
2250 serial->rx_urb_filled[i] = 0;
2251 }
2252 }
2253 serial->curr_rx_urb_idx = 0;
2254 serial->curr_rx_urb_offset = 0;
2255
2256 if (serial->tx_urb)
2257 usb_kill_urb(serial->tx_urb);
2258
2259 if (serial->shared_int) {
2260 mutex_lock(&serial->shared_int->shared_int_lock);
2261 if (serial->shared_int->use_count &&
2262 (--serial->shared_int->use_count == 0)) {
2263 struct urb *urb;
2264
2265 urb = serial->shared_int->shared_intr_urb;
2266 if (urb)
2267 usb_kill_urb(urb);
2268 }
2269 mutex_unlock(&serial->shared_int->shared_int_lock);
2270 }
2271 tiocmget = serial->tiocmget;
2272 if (tiocmget) {
2273 wake_up_interruptible(&tiocmget->waitq);
2274 usb_kill_urb(tiocmget->urb);
2275 }
2276
2277 return 0;
2278}
2279
2280static void hso_serial_common_free(struct hso_serial *serial)
2281{
2282 int i;
2283
2284 if (serial->parent->dev)
2285 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2286
2287 tty_unregister_device(tty_drv, serial->minor);
2288
2289 for (i = 0; i < serial->num_rx_urbs; i++) {
2290 /* unlink and free RX URB */
2291 usb_free_urb(serial->rx_urb[i]);
2292 /* free the RX buffer */
2293 kfree(serial->rx_data[i]);
2294 }
2295
2296 /* unlink and free TX URB */
2297 usb_free_urb(serial->tx_urb);
2298 kfree(serial->tx_data);
2299}
2300
2301static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2302 int rx_size, int tx_size)
2303{
2304 struct device *dev;
2305 int minor;
2306 int i;
2307
2308 minor = get_free_serial_index();
2309 if (minor < 0)
2310 goto exit;
2311
2312 /* register our minor number */
2313 serial->parent->dev = tty_register_device(tty_drv, minor,
2314 &serial->parent->interface->dev);
2315 dev = serial->parent->dev;
2316 dev_set_drvdata(dev, serial->parent);
2317 i = device_create_file(dev, &dev_attr_hsotype);
2318
2319 /* fill in specific data for later use */
2320 serial->minor = minor;
2321 serial->magic = HSO_SERIAL_MAGIC;
2322 spin_lock_init(&serial->serial_lock);
2323 serial->num_rx_urbs = num_urbs;
2324
2325 /* RX, allocate urb and initialize */
2326
2327 /* prepare our RX buffer */
2328 serial->rx_data_length = rx_size;
2329 for (i = 0; i < serial->num_rx_urbs; i++) {
2330 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2331 if (!serial->rx_urb[i]) {
2332 dev_err(dev, "Could not allocate urb?\n");
2333 goto exit;
2334 }
2335 serial->rx_urb[i]->transfer_buffer = NULL;
2336 serial->rx_urb[i]->transfer_buffer_length = 0;
2337 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2338 GFP_KERNEL);
2339 if (!serial->rx_data[i]) {
2340 dev_err(dev, "%s - Out of memory\n", __func__);
2341 goto exit;
2342 }
2343 }
2344
2345 /* TX, allocate urb and initialize */
2346 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2347 if (!serial->tx_urb) {
2348 dev_err(dev, "Could not allocate urb?\n");
2349 goto exit;
2350 }
2351 serial->tx_urb->transfer_buffer = NULL;
2352 serial->tx_urb->transfer_buffer_length = 0;
2353 /* prepare our TX buffer */
2354 serial->tx_data_count = 0;
2355 serial->tx_buffer_count = 0;
2356 serial->tx_data_length = tx_size;
2357 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2358 if (!serial->tx_data) {
2359 dev_err(dev, "%s - Out of memory\n", __func__);
2360 goto exit;
2361 }
2362 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2363 if (!serial->tx_buffer) {
2364 dev_err(dev, "%s - Out of memory\n", __func__);
2365 goto exit;
2366 }
2367
2368 return 0;
2369exit:
2370 hso_serial_common_free(serial);
2371 return -1;
2372}
2373
2374/* Creates a general hso device */
2375static struct hso_device *hso_create_device(struct usb_interface *intf,
2376 int port_spec)
2377{
2378 struct hso_device *hso_dev;
2379
2380 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2381 if (!hso_dev)
2382 return NULL;
2383
2384 hso_dev->port_spec = port_spec;
2385 hso_dev->usb = interface_to_usbdev(intf);
2386 hso_dev->interface = intf;
2387 kref_init(&hso_dev->ref);
2388 mutex_init(&hso_dev->mutex);
2389
2390 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2391 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2392 INIT_WORK(&hso_dev->reset_device, reset_device);
2393
2394 return hso_dev;
2395}
2396
2397/* Removes a network device in the network device table */
2398static int remove_net_device(struct hso_device *hso_dev)
2399{
2400 int i;
2401
2402 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2403 if (network_table[i] == hso_dev) {
2404 network_table[i] = NULL;
2405 break;
2406 }
2407 }
2408 if (i == HSO_MAX_NET_DEVICES)
2409 return -1;
2410 return 0;
2411}
2412
2413/* Frees our network device */
2414static void hso_free_net_device(struct hso_device *hso_dev)
2415{
2416 int i;
2417 struct hso_net *hso_net = dev2net(hso_dev);
2418
2419 if (!hso_net)
2420 return;
2421
2422 remove_net_device(hso_net->parent);
2423
2424 if (hso_net->net)
2425 unregister_netdev(hso_net->net);
2426
2427 /* start freeing */
2428 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2429 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2430 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2431 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2432 }
2433 usb_free_urb(hso_net->mux_bulk_tx_urb);
2434 kfree(hso_net->mux_bulk_tx_buf);
2435 hso_net->mux_bulk_tx_buf = NULL;
2436
2437 if (hso_net->net)
2438 free_netdev(hso_net->net);
2439
2440 kfree(hso_dev);
2441}
2442
2443static const struct net_device_ops hso_netdev_ops = {
2444 .ndo_open = hso_net_open,
2445 .ndo_stop = hso_net_close,
2446 .ndo_start_xmit = hso_net_start_xmit,
2447 .ndo_tx_timeout = hso_net_tx_timeout,
2448};
2449
2450/* initialize the network interface */
2451static void hso_net_init(struct net_device *net)
2452{
2453 struct hso_net *hso_net = netdev_priv(net);
2454
2455 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2456
2457 /* fill in the other fields */
2458 net->netdev_ops = &hso_netdev_ops;
2459 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2460 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2461 net->type = ARPHRD_NONE;
2462 net->mtu = DEFAULT_MTU - 14;
2463 net->tx_queue_len = 10;
2464 SET_ETHTOOL_OPS(net, &ops);
2465
2466 /* and initialize the semaphore */
2467 spin_lock_init(&hso_net->net_lock);
2468}
2469
2470/* Adds a network device in the network device table */
2471static int add_net_device(struct hso_device *hso_dev)
2472{
2473 int i;
2474
2475 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2476 if (network_table[i] == NULL) {
2477 network_table[i] = hso_dev;
2478 break;
2479 }
2480 }
2481 if (i == HSO_MAX_NET_DEVICES)
2482 return -1;
2483 return 0;
2484}
2485
2486static int hso_rfkill_set_block(void *data, bool blocked)
2487{
2488 struct hso_device *hso_dev = data;
2489 int enabled = !blocked;
2490 int rv;
2491
2492 mutex_lock(&hso_dev->mutex);
2493 if (hso_dev->usb_gone)
2494 rv = 0;
2495 else
2496 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2497 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2498 USB_CTRL_SET_TIMEOUT);
2499 mutex_unlock(&hso_dev->mutex);
2500 return rv;
2501}
2502
2503static const struct rfkill_ops hso_rfkill_ops = {
2504 .set_block = hso_rfkill_set_block,
2505};
2506
2507/* Creates and sets up everything for rfkill */
2508static void hso_create_rfkill(struct hso_device *hso_dev,
2509 struct usb_interface *interface)
2510{
2511 struct hso_net *hso_net = dev2net(hso_dev);
2512 struct device *dev = &hso_net->net->dev;
2513 char *rfkn;
2514
2515 rfkn = kzalloc(20, GFP_KERNEL);
2516 if (!rfkn)
2517 dev_err(dev, "%s - Out of memory\n", __func__);
2518
2519 snprintf(rfkn, 20, "hso-%d",
2520 interface->altsetting->desc.bInterfaceNumber);
2521
2522 hso_net->rfkill = rfkill_alloc(rfkn,
2523 &interface_to_usbdev(interface)->dev,
2524 RFKILL_TYPE_WWAN,
2525 &hso_rfkill_ops, hso_dev);
2526 if (!hso_net->rfkill) {
2527 dev_err(dev, "%s - Out of memory\n", __func__);
2528 kfree(rfkn);
2529 return;
2530 }
2531 if (rfkill_register(hso_net->rfkill) < 0) {
2532 rfkill_destroy(hso_net->rfkill);
2533 kfree(rfkn);
2534 hso_net->rfkill = NULL;
2535 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2536 return;
2537 }
2538}
2539
2540static struct device_type hso_type = {
2541 .name = "wwan",
2542};
2543
2544/* Creates our network device */
2545static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2546 int port_spec)
2547{
2548 int result, i;
2549 struct net_device *net;
2550 struct hso_net *hso_net;
2551 struct hso_device *hso_dev;
2552
2553 hso_dev = hso_create_device(interface, port_spec);
2554 if (!hso_dev)
2555 return NULL;
2556
2557 /* allocate our network device, then we can put in our private data */
2558 /* call hso_net_init to do the basic initialization */
2559 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2560 if (!net) {
2561 dev_err(&interface->dev, "Unable to create ethernet device\n");
2562 goto exit;
2563 }
2564
2565 hso_net = netdev_priv(net);
2566
2567 hso_dev->port_data.dev_net = hso_net;
2568 hso_net->net = net;
2569 hso_net->parent = hso_dev;
2570
2571 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2572 USB_DIR_IN);
2573 if (!hso_net->in_endp) {
2574 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2575 goto exit;
2576 }
2577 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2578 USB_DIR_OUT);
2579 if (!hso_net->out_endp) {
2580 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2581 goto exit;
2582 }
2583 SET_NETDEV_DEV(net, &interface->dev);
2584 SET_NETDEV_DEVTYPE(net, &hso_type);
2585
2586 /* registering our net device */
2587 result = register_netdev(net);
2588 if (result) {
2589 dev_err(&interface->dev, "Failed to register device\n");
2590 goto exit;
2591 }
2592
2593 /* start allocating */
2594 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2595 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2596 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2597 dev_err(&interface->dev, "Could not allocate rx urb\n");
2598 goto exit;
2599 }
2600 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2601 GFP_KERNEL);
2602 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2603 dev_err(&interface->dev, "Could not allocate rx buf\n");
2604 goto exit;
2605 }
2606 }
2607 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2608 if (!hso_net->mux_bulk_tx_urb) {
2609 dev_err(&interface->dev, "Could not allocate tx urb\n");
2610 goto exit;
2611 }
2612 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2613 if (!hso_net->mux_bulk_tx_buf) {
2614 dev_err(&interface->dev, "Could not allocate tx buf\n");
2615 goto exit;
2616 }
2617
2618 add_net_device(hso_dev);
2619
2620 hso_log_port(hso_dev);
2621
2622 hso_create_rfkill(hso_dev, interface);
2623
2624 return hso_dev;
2625exit:
2626 hso_free_net_device(hso_dev);
2627 return NULL;
2628}
2629
2630static void hso_free_tiomget(struct hso_serial *serial)
2631{
2632 struct hso_tiocmget *tiocmget;
2633 if (!serial)
2634 return;
2635 tiocmget = serial->tiocmget;
2636 if (tiocmget) {
2637 usb_free_urb(tiocmget->urb);
2638 tiocmget->urb = NULL;
2639 serial->tiocmget = NULL;
2640 kfree(tiocmget);
2641 }
2642}
2643
2644/* Frees an AT channel ( goes for both mux and non-mux ) */
2645static void hso_free_serial_device(struct hso_device *hso_dev)
2646{
2647 struct hso_serial *serial = dev2ser(hso_dev);
2648
2649 if (!serial)
2650 return;
2651 set_serial_by_index(serial->minor, NULL);
2652
2653 hso_serial_common_free(serial);
2654
2655 if (serial->shared_int) {
2656 mutex_lock(&serial->shared_int->shared_int_lock);
2657 if (--serial->shared_int->ref_count == 0)
2658 hso_free_shared_int(serial->shared_int);
2659 else
2660 mutex_unlock(&serial->shared_int->shared_int_lock);
2661 }
2662 hso_free_tiomget(serial);
2663 kfree(serial);
2664 kfree(hso_dev);
2665}
2666
2667/* Creates a bulk AT channel */
2668static struct hso_device *hso_create_bulk_serial_device(
2669 struct usb_interface *interface, int port)
2670{
2671 struct hso_device *hso_dev;
2672 struct hso_serial *serial;
2673 int num_urbs;
2674 struct hso_tiocmget *tiocmget;
2675
2676 hso_dev = hso_create_device(interface, port);
2677 if (!hso_dev)
2678 return NULL;
2679
2680 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2681 if (!serial)
2682 goto exit;
2683
2684 serial->parent = hso_dev;
2685 hso_dev->port_data.dev_serial = serial;
2686
2687 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2688 num_urbs = 2;
2689 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2690 GFP_KERNEL);
2691 /* it isn't going to break our heart if serial->tiocmget
2692 * allocation fails don't bother checking this.
2693 */
2694 if (serial->tiocmget) {
2695 tiocmget = serial->tiocmget;
2696 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2697 if (tiocmget->urb) {
2698 mutex_init(&tiocmget->mutex);
2699 init_waitqueue_head(&tiocmget->waitq);
2700 tiocmget->endp = hso_get_ep(
2701 interface,
2702 USB_ENDPOINT_XFER_INT,
2703 USB_DIR_IN);
2704 } else
2705 hso_free_tiomget(serial);
2706 }
2707 }
2708 else
2709 num_urbs = 1;
2710
2711 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2712 BULK_URB_TX_SIZE))
2713 goto exit;
2714
2715 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2716 USB_DIR_IN);
2717 if (!serial->in_endp) {
2718 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2719 goto exit2;
2720 }
2721
2722 if (!
2723 (serial->out_endp =
2724 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2725 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2726 goto exit2;
2727 }
2728
2729 serial->write_data = hso_std_serial_write_data;
2730
2731 /* and record this serial */
2732 set_serial_by_index(serial->minor, serial);
2733
2734 /* setup the proc dirs and files if needed */
2735 hso_log_port(hso_dev);
2736
2737 /* done, return it */
2738 return hso_dev;
2739
2740exit2:
2741 hso_serial_common_free(serial);
2742exit:
2743 hso_free_tiomget(serial);
2744 kfree(serial);
2745 kfree(hso_dev);
2746 return NULL;
2747}
2748
2749/* Creates a multiplexed AT channel */
2750static
2751struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2752 int port,
2753 struct hso_shared_int *mux)
2754{
2755 struct hso_device *hso_dev;
2756 struct hso_serial *serial;
2757 int port_spec;
2758
2759 port_spec = HSO_INTF_MUX;
2760 port_spec &= ~HSO_PORT_MASK;
2761
2762 port_spec |= hso_mux_to_port(port);
2763 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2764 return NULL;
2765
2766 hso_dev = hso_create_device(interface, port_spec);
2767 if (!hso_dev)
2768 return NULL;
2769
2770 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2771 if (!serial)
2772 goto exit;
2773
2774 hso_dev->port_data.dev_serial = serial;
2775 serial->parent = hso_dev;
2776
2777 if (hso_serial_common_create
2778 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2779 goto exit;
2780
2781 serial->tx_data_length--;
2782 serial->write_data = hso_mux_serial_write_data;
2783
2784 serial->shared_int = mux;
2785 mutex_lock(&serial->shared_int->shared_int_lock);
2786 serial->shared_int->ref_count++;
2787 mutex_unlock(&serial->shared_int->shared_int_lock);
2788
2789 /* and record this serial */
2790 set_serial_by_index(serial->minor, serial);
2791
2792 /* setup the proc dirs and files if needed */
2793 hso_log_port(hso_dev);
2794
2795 /* done, return it */
2796 return hso_dev;
2797
2798exit:
2799 if (serial) {
2800 tty_unregister_device(tty_drv, serial->minor);
2801 kfree(serial);
2802 }
2803 if (hso_dev)
2804 kfree(hso_dev);
2805 return NULL;
2806
2807}
2808
2809static void hso_free_shared_int(struct hso_shared_int *mux)
2810{
2811 usb_free_urb(mux->shared_intr_urb);
2812 kfree(mux->shared_intr_buf);
2813 mutex_unlock(&mux->shared_int_lock);
2814 kfree(mux);
2815}
2816
2817static
2818struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2819{
2820 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2821
2822 if (!mux)
2823 return NULL;
2824
2825 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2826 USB_DIR_IN);
2827 if (!mux->intr_endp) {
2828 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2829 goto exit;
2830 }
2831
2832 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2833 if (!mux->shared_intr_urb) {
2834 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2835 goto exit;
2836 }
2837 mux->shared_intr_buf =
2838 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2839 GFP_KERNEL);
2840 if (!mux->shared_intr_buf) {
2841 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2842 goto exit;
2843 }
2844
2845 mutex_init(&mux->shared_int_lock);
2846
2847 return mux;
2848
2849exit:
2850 kfree(mux->shared_intr_buf);
2851 usb_free_urb(mux->shared_intr_urb);
2852 kfree(mux);
2853 return NULL;
2854}
2855
2856/* Gets the port spec for a certain interface */
2857static int hso_get_config_data(struct usb_interface *interface)
2858{
2859 struct usb_device *usbdev = interface_to_usbdev(interface);
2860 u8 config_data[17];
2861 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2862 s32 result;
2863
2864 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2865 0x86, 0xC0, 0, 0, config_data, 17,
2866 USB_CTRL_SET_TIMEOUT) != 0x11) {
2867 return -EIO;
2868 }
2869
2870 switch (config_data[if_num]) {
2871 case 0x0:
2872 result = 0;
2873 break;
2874 case 0x1:
2875 result = HSO_PORT_DIAG;
2876 break;
2877 case 0x2:
2878 result = HSO_PORT_GPS;
2879 break;
2880 case 0x3:
2881 result = HSO_PORT_GPS_CONTROL;
2882 break;
2883 case 0x4:
2884 result = HSO_PORT_APP;
2885 break;
2886 case 0x5:
2887 result = HSO_PORT_APP2;
2888 break;
2889 case 0x6:
2890 result = HSO_PORT_CONTROL;
2891 break;
2892 case 0x7:
2893 result = HSO_PORT_NETWORK;
2894 break;
2895 case 0x8:
2896 result = HSO_PORT_MODEM;
2897 break;
2898 case 0x9:
2899 result = HSO_PORT_MSD;
2900 break;
2901 case 0xa:
2902 result = HSO_PORT_PCSC;
2903 break;
2904 case 0xb:
2905 result = HSO_PORT_VOICE;
2906 break;
2907 default:
2908 result = 0;
2909 }
2910
2911 if (result)
2912 result |= HSO_INTF_BULK;
2913
2914 if (config_data[16] & 0x1)
2915 result |= HSO_INFO_CRC_BUG;
2916
2917 return result;
2918}
2919
2920/* called once for each interface upon device insertion */
2921static int hso_probe(struct usb_interface *interface,
2922 const struct usb_device_id *id)
2923{
2924 int mux, i, if_num, port_spec;
2925 unsigned char port_mask;
2926 struct hso_device *hso_dev = NULL;
2927 struct hso_shared_int *shared_int;
2928 struct hso_device *tmp_dev = NULL;
2929
2930 if_num = interface->altsetting->desc.bInterfaceNumber;
2931
2932 /* Get the interface/port specification from either driver_info or from
2933 * the device itself */
2934 if (id->driver_info)
2935 port_spec = ((u32 *)(id->driver_info))[if_num];
2936 else
2937 port_spec = hso_get_config_data(interface);
2938
2939 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2940 dev_err(&interface->dev, "Not our interface\n");
2941 return -ENODEV;
2942 }
2943 /* Check if we need to switch to alt interfaces prior to port
2944 * configuration */
2945 if (interface->num_altsetting > 1)
2946 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2947 interface->needs_remote_wakeup = 1;
2948
2949 /* Allocate new hso device(s) */
2950 switch (port_spec & HSO_INTF_MASK) {
2951 case HSO_INTF_MUX:
2952 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2953 /* Create the network device */
2954 if (!disable_net) {
2955 hso_dev = hso_create_net_device(interface,
2956 port_spec);
2957 if (!hso_dev)
2958 goto exit;
2959 tmp_dev = hso_dev;
2960 }
2961 }
2962
2963 if (hso_get_mux_ports(interface, &port_mask))
2964 /* TODO: de-allocate everything */
2965 goto exit;
2966
2967 shared_int = hso_create_shared_int(interface);
2968 if (!shared_int)
2969 goto exit;
2970
2971 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2972 if (port_mask & i) {
2973 hso_dev = hso_create_mux_serial_device(
2974 interface, i, shared_int);
2975 if (!hso_dev)
2976 goto exit;
2977 }
2978 }
2979
2980 if (tmp_dev)
2981 hso_dev = tmp_dev;
2982 break;
2983
2984 case HSO_INTF_BULK:
2985 /* It's a regular bulk interface */
2986 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2987 if (!disable_net)
2988 hso_dev =
2989 hso_create_net_device(interface, port_spec);
2990 } else {
2991 hso_dev =
2992 hso_create_bulk_serial_device(interface, port_spec);
2993 }
2994 if (!hso_dev)
2995 goto exit;
2996 break;
2997 default:
2998 goto exit;
2999 }
3000
3001 /* save our data pointer in this device */
3002 usb_set_intfdata(interface, hso_dev);
3003
3004 /* done */
3005 return 0;
3006exit:
3007 hso_free_interface(interface);
3008 return -ENODEV;
3009}
3010
3011/* device removed, cleaning up */
3012static void hso_disconnect(struct usb_interface *interface)
3013{
3014 hso_free_interface(interface);
3015
3016 /* remove reference of our private data */
3017 usb_set_intfdata(interface, NULL);
3018}
3019
3020static void async_get_intf(struct work_struct *data)
3021{
3022 struct hso_device *hso_dev =
3023 container_of(data, struct hso_device, async_get_intf);
3024 usb_autopm_get_interface(hso_dev->interface);
3025}
3026
3027static void async_put_intf(struct work_struct *data)
3028{
3029 struct hso_device *hso_dev =
3030 container_of(data, struct hso_device, async_put_intf);
3031 usb_autopm_put_interface(hso_dev->interface);
3032}
3033
3034static int hso_get_activity(struct hso_device *hso_dev)
3035{
3036 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3037 if (!hso_dev->is_active) {
3038 hso_dev->is_active = 1;
3039 schedule_work(&hso_dev->async_get_intf);
3040 }
3041 }
3042
3043 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3044 return -EAGAIN;
3045
3046 usb_mark_last_busy(hso_dev->usb);
3047
3048 return 0;
3049}
3050
3051static int hso_put_activity(struct hso_device *hso_dev)
3052{
3053 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3054 if (hso_dev->is_active) {
3055 hso_dev->is_active = 0;
3056 schedule_work(&hso_dev->async_put_intf);
3057 return -EAGAIN;
3058 }
3059 }
3060 hso_dev->is_active = 0;
3061 return 0;
3062}
3063
3064/* called by kernel when we need to suspend device */
3065static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3066{
3067 int i, result;
3068
3069 /* Stop all serial ports */
3070 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3071 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3072 result = hso_stop_serial_device(serial_table[i]);
3073 if (result)
3074 goto out;
3075 }
3076 }
3077
3078 /* Stop all network ports */
3079 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3080 if (network_table[i] &&
3081 (network_table[i]->interface == iface)) {
3082 result = hso_stop_net_device(network_table[i]);
3083 if (result)
3084 goto out;
3085 }
3086 }
3087
3088out:
3089 return 0;
3090}
3091
3092/* called by kernel when we need to resume device */
3093static int hso_resume(struct usb_interface *iface)
3094{
3095 int i, result = 0;
3096 struct hso_net *hso_net;
3097
3098 /* Start all serial ports */
3099 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3100 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3101 if (dev2ser(serial_table[i])->open_count) {
3102 result =
3103 hso_start_serial_device(serial_table[i], GFP_NOIO);
3104 hso_kick_transmit(dev2ser(serial_table[i]));
3105 if (result)
3106 goto out;
3107 }
3108 }
3109 }
3110
3111 /* Start all network ports */
3112 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3113 if (network_table[i] &&
3114 (network_table[i]->interface == iface)) {
3115 hso_net = dev2net(network_table[i]);
3116 if (hso_net->flags & IFF_UP) {
3117 /* First transmit any lingering data,
3118 then restart the device. */
3119 if (hso_net->skb_tx_buf) {
3120 dev_dbg(&iface->dev,
3121 "Transmitting"
3122 " lingering data\n");
3123 hso_net_start_xmit(hso_net->skb_tx_buf,
3124 hso_net->net);
3125 hso_net->skb_tx_buf = NULL;
3126 }
3127 result = hso_start_net_device(network_table[i]);
3128 if (result)
3129 goto out;
3130 }
3131 }
3132 }
3133
3134out:
3135 return result;
3136}
3137
3138static void reset_device(struct work_struct *data)
3139{
3140 struct hso_device *hso_dev =
3141 container_of(data, struct hso_device, reset_device);
3142 struct usb_device *usb = hso_dev->usb;
3143 int result;
3144
3145 if (hso_dev->usb_gone) {
3146 D1("No reset during disconnect\n");
3147 } else {
3148 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3149 if (result < 0)
3150 D1("unable to lock device for reset: %d\n", result);
3151 else {
3152 usb_reset_device(usb);
3153 usb_unlock_device(usb);
3154 }
3155 }
3156}
3157
3158static void hso_serial_ref_free(struct kref *ref)
3159{
3160 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3161
3162 hso_free_serial_device(hso_dev);
3163}
3164
3165static void hso_free_interface(struct usb_interface *interface)
3166{
3167 struct hso_serial *hso_dev;
3168 struct tty_struct *tty;
3169 int i;
3170
3171 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3172 if (serial_table[i] &&
3173 (serial_table[i]->interface == interface)) {
3174 hso_dev = dev2ser(serial_table[i]);
3175 spin_lock_irq(&hso_dev->serial_lock);
3176 tty = tty_kref_get(hso_dev->tty);
3177 spin_unlock_irq(&hso_dev->serial_lock);
3178 if (tty)
3179 tty_hangup(tty);
3180 mutex_lock(&hso_dev->parent->mutex);
3181 tty_kref_put(tty);
3182 hso_dev->parent->usb_gone = 1;
3183 mutex_unlock(&hso_dev->parent->mutex);
3184 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3185 }
3186 }
3187
3188 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3189 if (network_table[i] &&
3190 (network_table[i]->interface == interface)) {
3191 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3192 /* hso_stop_net_device doesn't stop the net queue since
3193 * traffic needs to start it again when suspended */
3194 netif_stop_queue(dev2net(network_table[i])->net);
3195 hso_stop_net_device(network_table[i]);
3196 cancel_work_sync(&network_table[i]->async_put_intf);
3197 cancel_work_sync(&network_table[i]->async_get_intf);
3198 if (rfk) {
3199 rfkill_unregister(rfk);
3200 rfkill_destroy(rfk);
3201 }
3202 hso_free_net_device(network_table[i]);
3203 }
3204 }
3205}
3206
3207/* Helper functions */
3208
3209/* Get the endpoint ! */
3210static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3211 int type, int dir)
3212{
3213 int i;
3214 struct usb_host_interface *iface = intf->cur_altsetting;
3215 struct usb_endpoint_descriptor *endp;
3216
3217 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3218 endp = &iface->endpoint[i].desc;
3219 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3220 (usb_endpoint_type(endp) == type))
3221 return endp;
3222 }
3223
3224 return NULL;
3225}
3226
3227/* Get the byte that describes which ports are enabled */
3228static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3229{
3230 int i;
3231 struct usb_host_interface *iface = intf->cur_altsetting;
3232
3233 if (iface->extralen == 3) {
3234 *ports = iface->extra[2];
3235 return 0;
3236 }
3237
3238 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3239 if (iface->endpoint[i].extralen == 3) {
3240 *ports = iface->endpoint[i].extra[2];
3241 return 0;
3242 }
3243 }
3244
3245 return -1;
3246}
3247
3248/* interrupt urb needs to be submitted, used for serial read of muxed port */
3249static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3250 struct usb_device *usb, gfp_t gfp)
3251{
3252 int result;
3253
3254 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3255 usb_rcvintpipe(usb,
3256 shared_int->intr_endp->bEndpointAddress & 0x7F),
3257 shared_int->shared_intr_buf,
3258 1,
3259 intr_callback, shared_int,
3260 shared_int->intr_endp->bInterval);
3261
3262 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3263 if (result)
3264 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3265 result);
3266
3267 return result;
3268}
3269
3270/* operations setup of the serial interface */
3271static const struct tty_operations hso_serial_ops = {
3272 .open = hso_serial_open,
3273 .close = hso_serial_close,
3274 .write = hso_serial_write,
3275 .write_room = hso_serial_write_room,
3276 .ioctl = hso_serial_ioctl,
3277 .set_termios = hso_serial_set_termios,
3278 .chars_in_buffer = hso_serial_chars_in_buffer,
3279 .tiocmget = hso_serial_tiocmget,
3280 .tiocmset = hso_serial_tiocmset,
3281 .get_icount = hso_get_count,
3282 .unthrottle = hso_unthrottle
3283};
3284
3285static struct usb_driver hso_driver = {
3286 .name = driver_name,
3287 .probe = hso_probe,
3288 .disconnect = hso_disconnect,
3289 .id_table = hso_ids,
3290 .suspend = hso_suspend,
3291 .resume = hso_resume,
3292 .reset_resume = hso_resume,
3293 .supports_autosuspend = 1,
3294};
3295
3296static int __init hso_init(void)
3297{
3298 int i;
3299 int result;
3300
3301 /* put it in the log */
3302 printk(KERN_INFO "hso: %s\n", version);
3303
3304 /* Initialise the serial table semaphore and table */
3305 spin_lock_init(&serial_table_lock);
3306 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3307 serial_table[i] = NULL;
3308
3309 /* allocate our driver using the proper amount of supported minors */
3310 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3311 if (!tty_drv)
3312 return -ENOMEM;
3313
3314 /* fill in all needed values */
3315 tty_drv->magic = TTY_DRIVER_MAGIC;
3316 tty_drv->owner = THIS_MODULE;
3317 tty_drv->driver_name = driver_name;
3318 tty_drv->name = tty_filename;
3319
3320 /* if major number is provided as parameter, use that one */
3321 if (tty_major)
3322 tty_drv->major = tty_major;
3323
3324 tty_drv->minor_start = 0;
3325 tty_drv->num = HSO_SERIAL_TTY_MINORS;
3326 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3327 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3328 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3329 tty_drv->init_termios = tty_std_termios;
3330 hso_init_termios(&tty_drv->init_termios);
3331 tty_set_operations(tty_drv, &hso_serial_ops);
3332
3333 /* register the tty driver */
3334 result = tty_register_driver(tty_drv);
3335 if (result) {
3336 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3337 __func__, result);
3338 return result;
3339 }
3340
3341 /* register this module as an usb driver */
3342 result = usb_register(&hso_driver);
3343 if (result) {
3344 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3345 result);
3346 /* cleanup serial interface */
3347 tty_unregister_driver(tty_drv);
3348 return result;
3349 }
3350
3351 /* done */
3352 return 0;
3353}
3354
3355static void __exit hso_exit(void)
3356{
3357 printk(KERN_INFO "hso: unloaded\n");
3358
3359 tty_unregister_driver(tty_drv);
3360 /* deregister the usb driver */
3361 usb_deregister(&hso_driver);
3362}
3363
3364/* Module definitions */
3365module_init(hso_init);
3366module_exit(hso_exit);
3367
3368MODULE_AUTHOR(MOD_AUTHOR);
3369MODULE_DESCRIPTION(MOD_DESCRIPTION);
3370MODULE_LICENSE(MOD_LICENSE);
3371
3372/* change the debug level (eg: insmod hso.ko debug=0x04) */
3373MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3374module_param(debug, int, S_IRUGO | S_IWUSR);
3375
3376/* set the major tty number (eg: insmod hso.ko tty_major=245) */
3377MODULE_PARM_DESC(tty_major, "Set the major tty number");
3378module_param(tty_major, int, S_IRUGO | S_IWUSR);
3379
3380/* disable network interface (eg: insmod hso.ko disable_net=1) */
3381MODULE_PARM_DESC(disable_net, "Disable the network interface");
3382module_param(disable_net, int, S_IRUGO | S_IWUSR);
1/******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
8 * Jan Dumon <j.dumon@option.com>
9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10 * <ajb@spheresystems.co.uk>
11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12 * Copyright (C) 2008 Novell, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 * USA
27 *
28 *
29 *****************************************************************************/
30
31/******************************************************************************
32 *
33 * Description of the device:
34 *
35 * Interface 0: Contains the IP network interface on the bulk end points.
36 * The multiplexed serial ports are using the interrupt and
37 * control endpoints.
38 * Interrupt contains a bitmap telling which multiplexed
39 * serialport needs servicing.
40 *
41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42 * port is opened, as this have a huge impact on the network port
43 * throughput.
44 *
45 * Interface 2: Standard modem interface - circuit switched interface, this
46 * can be used to make a standard ppp connection however it
47 * should not be used in conjunction with the IP network interface
48 * enabled for USB performance reasons i.e. if using this set
49 * ideally disable_net=1.
50 *
51 *****************************************************************************/
52
53#include <linux/sched.h>
54#include <linux/slab.h>
55#include <linux/init.h>
56#include <linux/delay.h>
57#include <linux/netdevice.h>
58#include <linux/module.h>
59#include <linux/ethtool.h>
60#include <linux/usb.h>
61#include <linux/timer.h>
62#include <linux/tty.h>
63#include <linux/tty_driver.h>
64#include <linux/tty_flip.h>
65#include <linux/kmod.h>
66#include <linux/rfkill.h>
67#include <linux/ip.h>
68#include <linux/uaccess.h>
69#include <linux/usb/cdc.h>
70#include <net/arp.h>
71#include <asm/byteorder.h>
72#include <linux/serial_core.h>
73#include <linux/serial.h>
74
75
76#define MOD_AUTHOR "Option Wireless"
77#define MOD_DESCRIPTION "USB High Speed Option driver"
78#define MOD_LICENSE "GPL"
79
80#define HSO_MAX_NET_DEVICES 10
81#define HSO__MAX_MTU 2048
82#define DEFAULT_MTU 1500
83#define DEFAULT_MRU 1500
84
85#define CTRL_URB_RX_SIZE 1024
86#define CTRL_URB_TX_SIZE 64
87
88#define BULK_URB_RX_SIZE 4096
89#define BULK_URB_TX_SIZE 8192
90
91#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
92#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
93#define MUX_BULK_RX_BUF_COUNT 4
94#define USB_TYPE_OPTION_VENDOR 0x20
95
96/* These definitions are used with the struct hso_net flags element */
97/* - use *_bit operations on it. (bit indices not values.) */
98#define HSO_NET_RUNNING 0
99
100#define HSO_NET_TX_TIMEOUT (HZ*10)
101
102#define HSO_SERIAL_MAGIC 0x48534f31
103
104/* Number of ttys to handle */
105#define HSO_SERIAL_TTY_MINORS 256
106
107#define MAX_RX_URBS 2
108
109/*****************************************************************************/
110/* Debugging functions */
111/*****************************************************************************/
112#define D__(lvl_, fmt, arg...) \
113 do { \
114 printk(lvl_ "[%d:%s]: " fmt "\n", \
115 __LINE__, __func__, ## arg); \
116 } while (0)
117
118#define D_(lvl, args...) \
119 do { \
120 if (lvl & debug) \
121 D__(KERN_INFO, args); \
122 } while (0)
123
124#define D1(args...) D_(0x01, ##args)
125#define D2(args...) D_(0x02, ##args)
126#define D3(args...) D_(0x04, ##args)
127#define D4(args...) D_(0x08, ##args)
128#define D5(args...) D_(0x10, ##args)
129
130/*****************************************************************************/
131/* Enumerators */
132/*****************************************************************************/
133enum pkt_parse_state {
134 WAIT_IP,
135 WAIT_DATA,
136 WAIT_SYNC
137};
138
139/*****************************************************************************/
140/* Structs */
141/*****************************************************************************/
142
143struct hso_shared_int {
144 struct usb_endpoint_descriptor *intr_endp;
145 void *shared_intr_buf;
146 struct urb *shared_intr_urb;
147 struct usb_device *usb;
148 int use_count;
149 int ref_count;
150 struct mutex shared_int_lock;
151};
152
153struct hso_net {
154 struct hso_device *parent;
155 struct net_device *net;
156 struct rfkill *rfkill;
157
158 struct usb_endpoint_descriptor *in_endp;
159 struct usb_endpoint_descriptor *out_endp;
160
161 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
162 struct urb *mux_bulk_tx_urb;
163 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
164 void *mux_bulk_tx_buf;
165
166 struct sk_buff *skb_rx_buf;
167 struct sk_buff *skb_tx_buf;
168
169 enum pkt_parse_state rx_parse_state;
170 spinlock_t net_lock;
171
172 unsigned short rx_buf_size;
173 unsigned short rx_buf_missing;
174 struct iphdr rx_ip_hdr;
175
176 unsigned long flags;
177};
178
179enum rx_ctrl_state{
180 RX_IDLE,
181 RX_SENT,
182 RX_PENDING
183};
184
185#define BM_REQUEST_TYPE (0xa1)
186#define B_NOTIFICATION (0x20)
187#define W_VALUE (0x0)
188#define W_INDEX (0x2)
189#define W_LENGTH (0x2)
190
191#define B_OVERRUN (0x1<<6)
192#define B_PARITY (0x1<<5)
193#define B_FRAMING (0x1<<4)
194#define B_RING_SIGNAL (0x1<<3)
195#define B_BREAK (0x1<<2)
196#define B_TX_CARRIER (0x1<<1)
197#define B_RX_CARRIER (0x1<<0)
198
199struct hso_serial_state_notification {
200 u8 bmRequestType;
201 u8 bNotification;
202 u16 wValue;
203 u16 wIndex;
204 u16 wLength;
205 u16 UART_state_bitmap;
206} __packed;
207
208struct hso_tiocmget {
209 struct mutex mutex;
210 wait_queue_head_t waitq;
211 int intr_completed;
212 struct usb_endpoint_descriptor *endp;
213 struct urb *urb;
214 struct hso_serial_state_notification serial_state_notification;
215 u16 prev_UART_state_bitmap;
216 struct uart_icount icount;
217};
218
219
220struct hso_serial {
221 struct hso_device *parent;
222 int magic;
223 u8 minor;
224
225 struct hso_shared_int *shared_int;
226
227 /* rx/tx urb could be either a bulk urb or a control urb depending
228 on which serial port it is used on. */
229 struct urb *rx_urb[MAX_RX_URBS];
230 u8 num_rx_urbs;
231 u8 *rx_data[MAX_RX_URBS];
232 u16 rx_data_length; /* should contain allocated length */
233
234 struct urb *tx_urb;
235 u8 *tx_data;
236 u8 *tx_buffer;
237 u16 tx_data_length; /* should contain allocated length */
238 u16 tx_data_count;
239 u16 tx_buffer_count;
240 struct usb_ctrlrequest ctrl_req_tx;
241 struct usb_ctrlrequest ctrl_req_rx;
242
243 struct usb_endpoint_descriptor *in_endp;
244 struct usb_endpoint_descriptor *out_endp;
245
246 enum rx_ctrl_state rx_state;
247 u8 rts_state;
248 u8 dtr_state;
249 unsigned tx_urb_used:1;
250
251 struct tty_port port;
252 /* from usb_serial_port */
253 spinlock_t serial_lock;
254
255 int (*write_data) (struct hso_serial *serial);
256 struct hso_tiocmget *tiocmget;
257 /* Hacks required to get flow control
258 * working on the serial receive buffers
259 * so as not to drop characters on the floor.
260 */
261 int curr_rx_urb_idx;
262 u16 curr_rx_urb_offset;
263 u8 rx_urb_filled[MAX_RX_URBS];
264 struct tasklet_struct unthrottle_tasklet;
265 struct work_struct retry_unthrottle_workqueue;
266};
267
268struct hso_device {
269 union {
270 struct hso_serial *dev_serial;
271 struct hso_net *dev_net;
272 } port_data;
273
274 u32 port_spec;
275
276 u8 is_active;
277 u8 usb_gone;
278 struct work_struct async_get_intf;
279 struct work_struct async_put_intf;
280 struct work_struct reset_device;
281
282 struct usb_device *usb;
283 struct usb_interface *interface;
284
285 struct device *dev;
286 struct kref ref;
287 struct mutex mutex;
288};
289
290/* Type of interface */
291#define HSO_INTF_MASK 0xFF00
292#define HSO_INTF_MUX 0x0100
293#define HSO_INTF_BULK 0x0200
294
295/* Type of port */
296#define HSO_PORT_MASK 0xFF
297#define HSO_PORT_NO_PORT 0x0
298#define HSO_PORT_CONTROL 0x1
299#define HSO_PORT_APP 0x2
300#define HSO_PORT_GPS 0x3
301#define HSO_PORT_PCSC 0x4
302#define HSO_PORT_APP2 0x5
303#define HSO_PORT_GPS_CONTROL 0x6
304#define HSO_PORT_MSD 0x7
305#define HSO_PORT_VOICE 0x8
306#define HSO_PORT_DIAG2 0x9
307#define HSO_PORT_DIAG 0x10
308#define HSO_PORT_MODEM 0x11
309#define HSO_PORT_NETWORK 0x12
310
311/* Additional device info */
312#define HSO_INFO_MASK 0xFF000000
313#define HSO_INFO_CRC_BUG 0x01000000
314
315/*****************************************************************************/
316/* Prototypes */
317/*****************************************************************************/
318/* Serial driver functions */
319static int hso_serial_tiocmset(struct tty_struct *tty,
320 unsigned int set, unsigned int clear);
321static void ctrl_callback(struct urb *urb);
322static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
323static void hso_kick_transmit(struct hso_serial *serial);
324/* Helper functions */
325static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
326 struct usb_device *usb, gfp_t gfp);
327static void handle_usb_error(int status, const char *function,
328 struct hso_device *hso_dev);
329static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
330 int type, int dir);
331static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
332static void hso_free_interface(struct usb_interface *intf);
333static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
334static int hso_stop_serial_device(struct hso_device *hso_dev);
335static int hso_start_net_device(struct hso_device *hso_dev);
336static void hso_free_shared_int(struct hso_shared_int *shared_int);
337static int hso_stop_net_device(struct hso_device *hso_dev);
338static void hso_serial_ref_free(struct kref *ref);
339static void hso_std_serial_read_bulk_callback(struct urb *urb);
340static int hso_mux_serial_read(struct hso_serial *serial);
341static void async_get_intf(struct work_struct *data);
342static void async_put_intf(struct work_struct *data);
343static int hso_put_activity(struct hso_device *hso_dev);
344static int hso_get_activity(struct hso_device *hso_dev);
345static void tiocmget_intr_callback(struct urb *urb);
346static void reset_device(struct work_struct *data);
347/*****************************************************************************/
348/* Helping functions */
349/*****************************************************************************/
350
351/* #define DEBUG */
352
353static inline struct hso_net *dev2net(struct hso_device *hso_dev)
354{
355 return hso_dev->port_data.dev_net;
356}
357
358static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
359{
360 return hso_dev->port_data.dev_serial;
361}
362
363/* Debugging functions */
364#ifdef DEBUG
365static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
366 unsigned int len)
367{
368 static char name[255];
369
370 sprintf(name, "hso[%d:%s]", line_count, func_name);
371 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
372}
373
374#define DUMP(buf_, len_) \
375 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
376
377#define DUMP1(buf_, len_) \
378 do { \
379 if (0x01 & debug) \
380 DUMP(buf_, len_); \
381 } while (0)
382#else
383#define DUMP(buf_, len_)
384#define DUMP1(buf_, len_)
385#endif
386
387/* module parameters */
388static int debug;
389static int tty_major;
390static int disable_net;
391
392/* driver info */
393static const char driver_name[] = "hso";
394static const char tty_filename[] = "ttyHS";
395static const char *version = __FILE__ ": " MOD_AUTHOR;
396/* the usb driver itself (registered in hso_init) */
397static struct usb_driver hso_driver;
398/* serial structures */
399static struct tty_driver *tty_drv;
400static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
401static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
402static spinlock_t serial_table_lock;
403
404static const s32 default_port_spec[] = {
405 HSO_INTF_MUX | HSO_PORT_NETWORK,
406 HSO_INTF_BULK | HSO_PORT_DIAG,
407 HSO_INTF_BULK | HSO_PORT_MODEM,
408 0
409};
410
411static const s32 icon321_port_spec[] = {
412 HSO_INTF_MUX | HSO_PORT_NETWORK,
413 HSO_INTF_BULK | HSO_PORT_DIAG2,
414 HSO_INTF_BULK | HSO_PORT_MODEM,
415 HSO_INTF_BULK | HSO_PORT_DIAG,
416 0
417};
418
419#define default_port_device(vendor, product) \
420 USB_DEVICE(vendor, product), \
421 .driver_info = (kernel_ulong_t)default_port_spec
422
423#define icon321_port_device(vendor, product) \
424 USB_DEVICE(vendor, product), \
425 .driver_info = (kernel_ulong_t)icon321_port_spec
426
427/* list of devices we support */
428static const struct usb_device_id hso_ids[] = {
429 {default_port_device(0x0af0, 0x6711)},
430 {default_port_device(0x0af0, 0x6731)},
431 {default_port_device(0x0af0, 0x6751)},
432 {default_port_device(0x0af0, 0x6771)},
433 {default_port_device(0x0af0, 0x6791)},
434 {default_port_device(0x0af0, 0x6811)},
435 {default_port_device(0x0af0, 0x6911)},
436 {default_port_device(0x0af0, 0x6951)},
437 {default_port_device(0x0af0, 0x6971)},
438 {default_port_device(0x0af0, 0x7011)},
439 {default_port_device(0x0af0, 0x7031)},
440 {default_port_device(0x0af0, 0x7051)},
441 {default_port_device(0x0af0, 0x7071)},
442 {default_port_device(0x0af0, 0x7111)},
443 {default_port_device(0x0af0, 0x7211)},
444 {default_port_device(0x0af0, 0x7251)},
445 {default_port_device(0x0af0, 0x7271)},
446 {default_port_device(0x0af0, 0x7311)},
447 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
448 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
449 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
450 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
451 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
452 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
453 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
454 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
455 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
456 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
457 {USB_DEVICE(0x0af0, 0x7701)},
458 {USB_DEVICE(0x0af0, 0x7706)},
459 {USB_DEVICE(0x0af0, 0x7801)},
460 {USB_DEVICE(0x0af0, 0x7901)},
461 {USB_DEVICE(0x0af0, 0x7A01)},
462 {USB_DEVICE(0x0af0, 0x7A05)},
463 {USB_DEVICE(0x0af0, 0x8200)},
464 {USB_DEVICE(0x0af0, 0x8201)},
465 {USB_DEVICE(0x0af0, 0x8300)},
466 {USB_DEVICE(0x0af0, 0x8302)},
467 {USB_DEVICE(0x0af0, 0x8304)},
468 {USB_DEVICE(0x0af0, 0x8400)},
469 {USB_DEVICE(0x0af0, 0x8600)},
470 {USB_DEVICE(0x0af0, 0x8800)},
471 {USB_DEVICE(0x0af0, 0x8900)},
472 {USB_DEVICE(0x0af0, 0x9000)},
473 {USB_DEVICE(0x0af0, 0xd035)},
474 {USB_DEVICE(0x0af0, 0xd055)},
475 {USB_DEVICE(0x0af0, 0xd155)},
476 {USB_DEVICE(0x0af0, 0xd255)},
477 {USB_DEVICE(0x0af0, 0xd057)},
478 {USB_DEVICE(0x0af0, 0xd157)},
479 {USB_DEVICE(0x0af0, 0xd257)},
480 {USB_DEVICE(0x0af0, 0xd357)},
481 {USB_DEVICE(0x0af0, 0xd058)},
482 {USB_DEVICE(0x0af0, 0xc100)},
483 {}
484};
485MODULE_DEVICE_TABLE(usb, hso_ids);
486
487/* Sysfs attribute */
488static ssize_t hso_sysfs_show_porttype(struct device *dev,
489 struct device_attribute *attr,
490 char *buf)
491{
492 struct hso_device *hso_dev = dev_get_drvdata(dev);
493 char *port_name;
494
495 if (!hso_dev)
496 return 0;
497
498 switch (hso_dev->port_spec & HSO_PORT_MASK) {
499 case HSO_PORT_CONTROL:
500 port_name = "Control";
501 break;
502 case HSO_PORT_APP:
503 port_name = "Application";
504 break;
505 case HSO_PORT_APP2:
506 port_name = "Application2";
507 break;
508 case HSO_PORT_GPS:
509 port_name = "GPS";
510 break;
511 case HSO_PORT_GPS_CONTROL:
512 port_name = "GPS Control";
513 break;
514 case HSO_PORT_PCSC:
515 port_name = "PCSC";
516 break;
517 case HSO_PORT_DIAG:
518 port_name = "Diagnostic";
519 break;
520 case HSO_PORT_DIAG2:
521 port_name = "Diagnostic2";
522 break;
523 case HSO_PORT_MODEM:
524 port_name = "Modem";
525 break;
526 case HSO_PORT_NETWORK:
527 port_name = "Network";
528 break;
529 default:
530 port_name = "Unknown";
531 break;
532 }
533
534 return sprintf(buf, "%s\n", port_name);
535}
536static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
537
538static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
539{
540 int idx;
541
542 for (idx = 0; idx < serial->num_rx_urbs; idx++)
543 if (serial->rx_urb[idx] == urb)
544 return idx;
545 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
546 return -1;
547}
548
549/* converts mux value to a port spec value */
550static u32 hso_mux_to_port(int mux)
551{
552 u32 result;
553
554 switch (mux) {
555 case 0x1:
556 result = HSO_PORT_CONTROL;
557 break;
558 case 0x2:
559 result = HSO_PORT_APP;
560 break;
561 case 0x4:
562 result = HSO_PORT_PCSC;
563 break;
564 case 0x8:
565 result = HSO_PORT_GPS;
566 break;
567 case 0x10:
568 result = HSO_PORT_APP2;
569 break;
570 default:
571 result = HSO_PORT_NO_PORT;
572 }
573 return result;
574}
575
576/* converts port spec value to a mux value */
577static u32 hso_port_to_mux(int port)
578{
579 u32 result;
580
581 switch (port & HSO_PORT_MASK) {
582 case HSO_PORT_CONTROL:
583 result = 0x0;
584 break;
585 case HSO_PORT_APP:
586 result = 0x1;
587 break;
588 case HSO_PORT_PCSC:
589 result = 0x2;
590 break;
591 case HSO_PORT_GPS:
592 result = 0x3;
593 break;
594 case HSO_PORT_APP2:
595 result = 0x4;
596 break;
597 default:
598 result = 0x0;
599 }
600 return result;
601}
602
603static struct hso_serial *get_serial_by_shared_int_and_type(
604 struct hso_shared_int *shared_int,
605 int mux)
606{
607 int i, port;
608
609 port = hso_mux_to_port(mux);
610
611 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
612 if (serial_table[i] &&
613 (dev2ser(serial_table[i])->shared_int == shared_int) &&
614 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
615 return dev2ser(serial_table[i]);
616 }
617 }
618
619 return NULL;
620}
621
622static struct hso_serial *get_serial_by_index(unsigned index)
623{
624 struct hso_serial *serial = NULL;
625 unsigned long flags;
626
627 spin_lock_irqsave(&serial_table_lock, flags);
628 if (serial_table[index])
629 serial = dev2ser(serial_table[index]);
630 spin_unlock_irqrestore(&serial_table_lock, flags);
631
632 return serial;
633}
634
635static int get_free_serial_index(void)
636{
637 int index;
638 unsigned long flags;
639
640 spin_lock_irqsave(&serial_table_lock, flags);
641 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
642 if (serial_table[index] == NULL) {
643 spin_unlock_irqrestore(&serial_table_lock, flags);
644 return index;
645 }
646 }
647 spin_unlock_irqrestore(&serial_table_lock, flags);
648
649 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
650 return -1;
651}
652
653static void set_serial_by_index(unsigned index, struct hso_serial *serial)
654{
655 unsigned long flags;
656
657 spin_lock_irqsave(&serial_table_lock, flags);
658 if (serial)
659 serial_table[index] = serial->parent;
660 else
661 serial_table[index] = NULL;
662 spin_unlock_irqrestore(&serial_table_lock, flags);
663}
664
665static void handle_usb_error(int status, const char *function,
666 struct hso_device *hso_dev)
667{
668 char *explanation;
669
670 switch (status) {
671 case -ENODEV:
672 explanation = "no device";
673 break;
674 case -ENOENT:
675 explanation = "endpoint not enabled";
676 break;
677 case -EPIPE:
678 explanation = "endpoint stalled";
679 break;
680 case -ENOSPC:
681 explanation = "not enough bandwidth";
682 break;
683 case -ESHUTDOWN:
684 explanation = "device disabled";
685 break;
686 case -EHOSTUNREACH:
687 explanation = "device suspended";
688 break;
689 case -EINVAL:
690 case -EAGAIN:
691 case -EFBIG:
692 case -EMSGSIZE:
693 explanation = "internal error";
694 break;
695 case -EILSEQ:
696 case -EPROTO:
697 case -ETIME:
698 case -ETIMEDOUT:
699 explanation = "protocol error";
700 if (hso_dev)
701 schedule_work(&hso_dev->reset_device);
702 break;
703 default:
704 explanation = "unknown status";
705 break;
706 }
707
708 /* log a meaningful explanation of an USB status */
709 D1("%s: received USB status - %s (%d)", function, explanation, status);
710}
711
712/* Network interface functions */
713
714/* called when net interface is brought up by ifconfig */
715static int hso_net_open(struct net_device *net)
716{
717 struct hso_net *odev = netdev_priv(net);
718 unsigned long flags = 0;
719
720 if (!odev) {
721 dev_err(&net->dev, "No net device !\n");
722 return -ENODEV;
723 }
724
725 odev->skb_tx_buf = NULL;
726
727 /* setup environment */
728 spin_lock_irqsave(&odev->net_lock, flags);
729 odev->rx_parse_state = WAIT_IP;
730 odev->rx_buf_size = 0;
731 odev->rx_buf_missing = sizeof(struct iphdr);
732 spin_unlock_irqrestore(&odev->net_lock, flags);
733
734 /* We are up and running. */
735 set_bit(HSO_NET_RUNNING, &odev->flags);
736 hso_start_net_device(odev->parent);
737
738 /* Tell the kernel we are ready to start receiving from it */
739 netif_start_queue(net);
740
741 return 0;
742}
743
744/* called when interface is brought down by ifconfig */
745static int hso_net_close(struct net_device *net)
746{
747 struct hso_net *odev = netdev_priv(net);
748
749 /* we don't need the queue anymore */
750 netif_stop_queue(net);
751 /* no longer running */
752 clear_bit(HSO_NET_RUNNING, &odev->flags);
753
754 hso_stop_net_device(odev->parent);
755
756 /* done */
757 return 0;
758}
759
760/* USB tells is xmit done, we should start the netqueue again */
761static void write_bulk_callback(struct urb *urb)
762{
763 struct hso_net *odev = urb->context;
764 int status = urb->status;
765
766 /* Sanity check */
767 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
768 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
769 return;
770 }
771
772 /* Do we still have a valid kernel network device? */
773 if (!netif_device_present(odev->net)) {
774 dev_err(&urb->dev->dev, "%s: net device not present\n",
775 __func__);
776 return;
777 }
778
779 /* log status, but don't act on it, we don't need to resubmit anything
780 * anyhow */
781 if (status)
782 handle_usb_error(status, __func__, odev->parent);
783
784 hso_put_activity(odev->parent);
785
786 /* Tell the network interface we are ready for another frame */
787 netif_wake_queue(odev->net);
788}
789
790/* called by kernel when we need to transmit a packet */
791static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
792 struct net_device *net)
793{
794 struct hso_net *odev = netdev_priv(net);
795 int result;
796
797 /* Tell the kernel, "No more frames 'til we are done with this one." */
798 netif_stop_queue(net);
799 if (hso_get_activity(odev->parent) == -EAGAIN) {
800 odev->skb_tx_buf = skb;
801 return NETDEV_TX_OK;
802 }
803
804 /* log if asked */
805 DUMP1(skb->data, skb->len);
806 /* Copy it from kernel memory to OUR memory */
807 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
808 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
809
810 /* Fill in the URB for shipping it out. */
811 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
812 odev->parent->usb,
813 usb_sndbulkpipe(odev->parent->usb,
814 odev->out_endp->
815 bEndpointAddress & 0x7F),
816 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
817 odev);
818
819 /* Deal with the Zero Length packet problem, I hope */
820 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
821
822 /* Send the URB on its merry way. */
823 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
824 if (result) {
825 dev_warn(&odev->parent->interface->dev,
826 "failed mux_bulk_tx_urb %d\n", result);
827 net->stats.tx_errors++;
828 netif_start_queue(net);
829 } else {
830 net->stats.tx_packets++;
831 net->stats.tx_bytes += skb->len;
832 }
833 dev_kfree_skb(skb);
834 /* we're done */
835 return NETDEV_TX_OK;
836}
837
838static const struct ethtool_ops ops = {
839 .get_link = ethtool_op_get_link
840};
841
842/* called when a packet did not ack after watchdogtimeout */
843static void hso_net_tx_timeout(struct net_device *net)
844{
845 struct hso_net *odev = netdev_priv(net);
846
847 if (!odev)
848 return;
849
850 /* Tell syslog we are hosed. */
851 dev_warn(&net->dev, "Tx timed out.\n");
852
853 /* Tear the waiting frame off the list */
854 if (odev->mux_bulk_tx_urb &&
855 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
856 usb_unlink_urb(odev->mux_bulk_tx_urb);
857
858 /* Update statistics */
859 net->stats.tx_errors++;
860}
861
862/* make a real packet from the received USB buffer */
863static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
864 unsigned int count, unsigned char is_eop)
865{
866 unsigned short temp_bytes;
867 unsigned short buffer_offset = 0;
868 unsigned short frame_len;
869 unsigned char *tmp_rx_buf;
870
871 /* log if needed */
872 D1("Rx %d bytes", count);
873 DUMP(ip_pkt, min(128, (int)count));
874
875 while (count) {
876 switch (odev->rx_parse_state) {
877 case WAIT_IP:
878 /* waiting for IP header. */
879 /* wanted bytes - size of ip header */
880 temp_bytes =
881 (count <
882 odev->rx_buf_missing) ? count : odev->
883 rx_buf_missing;
884
885 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
886 odev->rx_buf_size, ip_pkt + buffer_offset,
887 temp_bytes);
888
889 odev->rx_buf_size += temp_bytes;
890 buffer_offset += temp_bytes;
891 odev->rx_buf_missing -= temp_bytes;
892 count -= temp_bytes;
893
894 if (!odev->rx_buf_missing) {
895 /* header is complete allocate an sk_buffer and
896 * continue to WAIT_DATA */
897 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
898
899 if ((frame_len > DEFAULT_MRU) ||
900 (frame_len < sizeof(struct iphdr))) {
901 dev_err(&odev->net->dev,
902 "Invalid frame (%d) length\n",
903 frame_len);
904 odev->rx_parse_state = WAIT_SYNC;
905 continue;
906 }
907 /* Allocate an sk_buff */
908 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
909 frame_len);
910 if (!odev->skb_rx_buf) {
911 /* We got no receive buffer. */
912 D1("could not allocate memory");
913 odev->rx_parse_state = WAIT_SYNC;
914 return;
915 }
916
917 /* Copy what we got so far. make room for iphdr
918 * after tail. */
919 tmp_rx_buf =
920 skb_put(odev->skb_rx_buf,
921 sizeof(struct iphdr));
922 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
923 sizeof(struct iphdr));
924
925 /* ETH_HLEN */
926 odev->rx_buf_size = sizeof(struct iphdr);
927
928 /* Filip actually use .tot_len */
929 odev->rx_buf_missing =
930 frame_len - sizeof(struct iphdr);
931 odev->rx_parse_state = WAIT_DATA;
932 }
933 break;
934
935 case WAIT_DATA:
936 temp_bytes = (count < odev->rx_buf_missing)
937 ? count : odev->rx_buf_missing;
938
939 /* Copy the rest of the bytes that are left in the
940 * buffer into the waiting sk_buf. */
941 /* Make room for temp_bytes after tail. */
942 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
943 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
944
945 odev->rx_buf_missing -= temp_bytes;
946 count -= temp_bytes;
947 buffer_offset += temp_bytes;
948 odev->rx_buf_size += temp_bytes;
949 if (!odev->rx_buf_missing) {
950 /* Packet is complete. Inject into stack. */
951 /* We have IP packet here */
952 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
953 skb_reset_mac_header(odev->skb_rx_buf);
954
955 /* Ship it off to the kernel */
956 netif_rx(odev->skb_rx_buf);
957 /* No longer our buffer. */
958 odev->skb_rx_buf = NULL;
959
960 /* update out statistics */
961 odev->net->stats.rx_packets++;
962
963 odev->net->stats.rx_bytes += odev->rx_buf_size;
964
965 odev->rx_buf_size = 0;
966 odev->rx_buf_missing = sizeof(struct iphdr);
967 odev->rx_parse_state = WAIT_IP;
968 }
969 break;
970
971 case WAIT_SYNC:
972 D1(" W_S");
973 count = 0;
974 break;
975 default:
976 D1(" ");
977 count--;
978 break;
979 }
980 }
981
982 /* Recovery mechanism for WAIT_SYNC state. */
983 if (is_eop) {
984 if (odev->rx_parse_state == WAIT_SYNC) {
985 odev->rx_parse_state = WAIT_IP;
986 odev->rx_buf_size = 0;
987 odev->rx_buf_missing = sizeof(struct iphdr);
988 }
989 }
990}
991
992static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
993{
994 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
995 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
996
997 if (((rest == 5) || (rest == 6)) &&
998 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
999 crc_check, 4)) {
1000 urb->actual_length -= 4;
1001 }
1002}
1003
1004/* Moving data from usb to kernel (in interrupt state) */
1005static void read_bulk_callback(struct urb *urb)
1006{
1007 struct hso_net *odev = urb->context;
1008 struct net_device *net;
1009 int result;
1010 int status = urb->status;
1011
1012 /* is al ok? (Filip: Who's Al ?) */
1013 if (status) {
1014 handle_usb_error(status, __func__, odev->parent);
1015 return;
1016 }
1017
1018 /* Sanity check */
1019 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1020 D1("BULK IN callback but driver is not active!");
1021 return;
1022 }
1023 usb_mark_last_busy(urb->dev);
1024
1025 net = odev->net;
1026
1027 if (!netif_device_present(net)) {
1028 /* Somebody killed our network interface... */
1029 return;
1030 }
1031
1032 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1033 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1034
1035 /* do we even have a packet? */
1036 if (urb->actual_length) {
1037 /* Handle the IP stream, add header and push it onto network
1038 * stack if the packet is complete. */
1039 spin_lock(&odev->net_lock);
1040 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1041 (urb->transfer_buffer_length >
1042 urb->actual_length) ? 1 : 0);
1043 spin_unlock(&odev->net_lock);
1044 }
1045
1046 /* We are done with this URB, resubmit it. Prep the USB to wait for
1047 * another frame. Reuse same as received. */
1048 usb_fill_bulk_urb(urb,
1049 odev->parent->usb,
1050 usb_rcvbulkpipe(odev->parent->usb,
1051 odev->in_endp->
1052 bEndpointAddress & 0x7F),
1053 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1054 read_bulk_callback, odev);
1055
1056 /* Give this to the USB subsystem so it can tell us when more data
1057 * arrives. */
1058 result = usb_submit_urb(urb, GFP_ATOMIC);
1059 if (result)
1060 dev_warn(&odev->parent->interface->dev,
1061 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1062 result);
1063}
1064
1065/* Serial driver functions */
1066
1067static void hso_init_termios(struct ktermios *termios)
1068{
1069 /*
1070 * The default requirements for this device are:
1071 */
1072 termios->c_iflag &=
1073 ~(IGNBRK /* disable ignore break */
1074 | BRKINT /* disable break causes interrupt */
1075 | PARMRK /* disable mark parity errors */
1076 | ISTRIP /* disable clear high bit of input characters */
1077 | INLCR /* disable translate NL to CR */
1078 | IGNCR /* disable ignore CR */
1079 | ICRNL /* disable translate CR to NL */
1080 | IXON); /* disable enable XON/XOFF flow control */
1081
1082 /* disable postprocess output characters */
1083 termios->c_oflag &= ~OPOST;
1084
1085 termios->c_lflag &=
1086 ~(ECHO /* disable echo input characters */
1087 | ECHONL /* disable echo new line */
1088 | ICANON /* disable erase, kill, werase, and rprnt
1089 special characters */
1090 | ISIG /* disable interrupt, quit, and suspend special
1091 characters */
1092 | IEXTEN); /* disable non-POSIX special characters */
1093
1094 termios->c_cflag &=
1095 ~(CSIZE /* no size */
1096 | PARENB /* disable parity bit */
1097 | CBAUD /* clear current baud rate */
1098 | CBAUDEX); /* clear current buad rate */
1099
1100 termios->c_cflag |= CS8; /* character size 8 bits */
1101
1102 /* baud rate 115200 */
1103 tty_termios_encode_baud_rate(termios, 115200, 115200);
1104}
1105
1106static void _hso_serial_set_termios(struct tty_struct *tty,
1107 struct ktermios *old)
1108{
1109 struct hso_serial *serial = tty->driver_data;
1110 struct ktermios *termios;
1111
1112 if (!serial) {
1113 printk(KERN_ERR "%s: no tty structures", __func__);
1114 return;
1115 }
1116
1117 D4("port %d", serial->minor);
1118
1119 /*
1120 * Fix up unsupported bits
1121 */
1122 termios = tty->termios;
1123 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1124
1125 termios->c_cflag &=
1126 ~(CSIZE /* no size */
1127 | PARENB /* disable parity bit */
1128 | CBAUD /* clear current baud rate */
1129 | CBAUDEX); /* clear current buad rate */
1130
1131 termios->c_cflag |= CS8; /* character size 8 bits */
1132
1133 /* baud rate 115200 */
1134 tty_encode_baud_rate(tty, 115200, 115200);
1135}
1136
1137static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1138{
1139 int result;
1140 /* We are done with this URB, resubmit it. Prep the USB to wait for
1141 * another frame */
1142 usb_fill_bulk_urb(urb, serial->parent->usb,
1143 usb_rcvbulkpipe(serial->parent->usb,
1144 serial->in_endp->
1145 bEndpointAddress & 0x7F),
1146 urb->transfer_buffer, serial->rx_data_length,
1147 hso_std_serial_read_bulk_callback, serial);
1148 /* Give this to the USB subsystem so it can tell us when more data
1149 * arrives. */
1150 result = usb_submit_urb(urb, GFP_ATOMIC);
1151 if (result) {
1152 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1153 __func__, result);
1154 }
1155}
1156
1157
1158
1159
1160static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1161{
1162 int count;
1163 struct urb *curr_urb;
1164
1165 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1166 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1167 count = put_rxbuf_data(curr_urb, serial);
1168 if (count == -1)
1169 return;
1170 if (count == 0) {
1171 serial->curr_rx_urb_idx++;
1172 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1173 serial->curr_rx_urb_idx = 0;
1174 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1175 }
1176 }
1177}
1178
1179static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1180{
1181 int count = 0;
1182 struct urb *urb;
1183
1184 urb = serial->rx_urb[0];
1185 if (serial->port.count > 0) {
1186 count = put_rxbuf_data(urb, serial);
1187 if (count == -1)
1188 return;
1189 }
1190 /* Re issue a read as long as we receive data. */
1191
1192 if (count == 0 && ((urb->actual_length != 0) ||
1193 (serial->rx_state == RX_PENDING))) {
1194 serial->rx_state = RX_SENT;
1195 hso_mux_serial_read(serial);
1196 } else
1197 serial->rx_state = RX_IDLE;
1198}
1199
1200
1201/* read callback for Diag and CS port */
1202static void hso_std_serial_read_bulk_callback(struct urb *urb)
1203{
1204 struct hso_serial *serial = urb->context;
1205 int status = urb->status;
1206
1207 /* sanity check */
1208 if (!serial) {
1209 D1("serial == NULL");
1210 return;
1211 } else if (status) {
1212 handle_usb_error(status, __func__, serial->parent);
1213 return;
1214 }
1215
1216 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1217 D1("Actual length = %d\n", urb->actual_length);
1218 DUMP1(urb->transfer_buffer, urb->actual_length);
1219
1220 /* Anyone listening? */
1221 if (serial->port.count == 0)
1222 return;
1223
1224 if (status == 0) {
1225 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1226 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1227 /* Valid data, handle RX data */
1228 spin_lock(&serial->serial_lock);
1229 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1230 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1231 spin_unlock(&serial->serial_lock);
1232 } else if (status == -ENOENT || status == -ECONNRESET) {
1233 /* Unlinked - check for throttled port. */
1234 D2("Port %d, successfully unlinked urb", serial->minor);
1235 spin_lock(&serial->serial_lock);
1236 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1237 hso_resubmit_rx_bulk_urb(serial, urb);
1238 spin_unlock(&serial->serial_lock);
1239 } else {
1240 D2("Port %d, status = %d for read urb", serial->minor, status);
1241 return;
1242 }
1243}
1244
1245/*
1246 * This needs to be a tasklet otherwise we will
1247 * end up recursively calling this function.
1248 */
1249static void hso_unthrottle_tasklet(struct hso_serial *serial)
1250{
1251 unsigned long flags;
1252
1253 spin_lock_irqsave(&serial->serial_lock, flags);
1254 if ((serial->parent->port_spec & HSO_INTF_MUX))
1255 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1256 else
1257 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1258 spin_unlock_irqrestore(&serial->serial_lock, flags);
1259}
1260
1261static void hso_unthrottle(struct tty_struct *tty)
1262{
1263 struct hso_serial *serial = tty->driver_data;
1264
1265 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1266}
1267
1268static void hso_unthrottle_workfunc(struct work_struct *work)
1269{
1270 struct hso_serial *serial =
1271 container_of(work, struct hso_serial,
1272 retry_unthrottle_workqueue);
1273 hso_unthrottle_tasklet(serial);
1274}
1275
1276/* open the requested serial port */
1277static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1278{
1279 struct hso_serial *serial = get_serial_by_index(tty->index);
1280 int result;
1281
1282 /* sanity check */
1283 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1284 WARN_ON(1);
1285 tty->driver_data = NULL;
1286 D1("Failed to open port");
1287 return -ENODEV;
1288 }
1289
1290 mutex_lock(&serial->parent->mutex);
1291 result = usb_autopm_get_interface(serial->parent->interface);
1292 if (result < 0)
1293 goto err_out;
1294
1295 D1("Opening %d", serial->minor);
1296 kref_get(&serial->parent->ref);
1297
1298 /* setup */
1299 tty->driver_data = serial;
1300 tty_port_tty_set(&serial->port, tty);
1301
1302 /* check for port already opened, if not set the termios */
1303 serial->port.count++;
1304 if (serial->port.count == 1) {
1305 serial->rx_state = RX_IDLE;
1306 /* Force default termio settings */
1307 _hso_serial_set_termios(tty, NULL);
1308 tasklet_init(&serial->unthrottle_tasklet,
1309 (void (*)(unsigned long))hso_unthrottle_tasklet,
1310 (unsigned long)serial);
1311 INIT_WORK(&serial->retry_unthrottle_workqueue,
1312 hso_unthrottle_workfunc);
1313 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1314 if (result) {
1315 hso_stop_serial_device(serial->parent);
1316 serial->port.count--;
1317 kref_put(&serial->parent->ref, hso_serial_ref_free);
1318 }
1319 } else {
1320 D1("Port was already open");
1321 }
1322
1323 usb_autopm_put_interface(serial->parent->interface);
1324
1325 /* done */
1326 if (result)
1327 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1328err_out:
1329 mutex_unlock(&serial->parent->mutex);
1330 return result;
1331}
1332
1333/* close the requested serial port */
1334static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1335{
1336 struct hso_serial *serial = tty->driver_data;
1337 u8 usb_gone;
1338
1339 D1("Closing serial port");
1340
1341 /* Open failed, no close cleanup required */
1342 if (serial == NULL)
1343 return;
1344
1345 mutex_lock(&serial->parent->mutex);
1346 usb_gone = serial->parent->usb_gone;
1347
1348 if (!usb_gone)
1349 usb_autopm_get_interface(serial->parent->interface);
1350
1351 /* reset the rts and dtr */
1352 /* do the actual close */
1353 serial->port.count--;
1354
1355 if (serial->port.count <= 0) {
1356 serial->port.count = 0;
1357 tty_port_tty_set(&serial->port, NULL);
1358 if (!usb_gone)
1359 hso_stop_serial_device(serial->parent);
1360 tasklet_kill(&serial->unthrottle_tasklet);
1361 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1362 }
1363
1364 if (!usb_gone)
1365 usb_autopm_put_interface(serial->parent->interface);
1366
1367 mutex_unlock(&serial->parent->mutex);
1368
1369 kref_put(&serial->parent->ref, hso_serial_ref_free);
1370}
1371
1372/* close the requested serial port */
1373static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1374 int count)
1375{
1376 struct hso_serial *serial = tty->driver_data;
1377 int space, tx_bytes;
1378 unsigned long flags;
1379
1380 /* sanity check */
1381 if (serial == NULL) {
1382 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1383 return -ENODEV;
1384 }
1385
1386 spin_lock_irqsave(&serial->serial_lock, flags);
1387
1388 space = serial->tx_data_length - serial->tx_buffer_count;
1389 tx_bytes = (count < space) ? count : space;
1390
1391 if (!tx_bytes)
1392 goto out;
1393
1394 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1395 serial->tx_buffer_count += tx_bytes;
1396
1397out:
1398 spin_unlock_irqrestore(&serial->serial_lock, flags);
1399
1400 hso_kick_transmit(serial);
1401 /* done */
1402 return tx_bytes;
1403}
1404
1405/* how much room is there for writing */
1406static int hso_serial_write_room(struct tty_struct *tty)
1407{
1408 struct hso_serial *serial = tty->driver_data;
1409 int room;
1410 unsigned long flags;
1411
1412 spin_lock_irqsave(&serial->serial_lock, flags);
1413 room = serial->tx_data_length - serial->tx_buffer_count;
1414 spin_unlock_irqrestore(&serial->serial_lock, flags);
1415
1416 /* return free room */
1417 return room;
1418}
1419
1420/* setup the term */
1421static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1422{
1423 struct hso_serial *serial = tty->driver_data;
1424 unsigned long flags;
1425
1426 if (old)
1427 D5("Termios called with: cflags new[%d] - old[%d]",
1428 tty->termios->c_cflag, old->c_cflag);
1429
1430 /* the actual setup */
1431 spin_lock_irqsave(&serial->serial_lock, flags);
1432 if (serial->port.count)
1433 _hso_serial_set_termios(tty, old);
1434 else
1435 tty->termios = old;
1436 spin_unlock_irqrestore(&serial->serial_lock, flags);
1437
1438 /* done */
1439}
1440
1441/* how many characters in the buffer */
1442static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1443{
1444 struct hso_serial *serial = tty->driver_data;
1445 int chars;
1446 unsigned long flags;
1447
1448 /* sanity check */
1449 if (serial == NULL)
1450 return 0;
1451
1452 spin_lock_irqsave(&serial->serial_lock, flags);
1453 chars = serial->tx_buffer_count;
1454 spin_unlock_irqrestore(&serial->serial_lock, flags);
1455
1456 return chars;
1457}
1458static int tiocmget_submit_urb(struct hso_serial *serial,
1459 struct hso_tiocmget *tiocmget,
1460 struct usb_device *usb)
1461{
1462 int result;
1463
1464 if (serial->parent->usb_gone)
1465 return -ENODEV;
1466 usb_fill_int_urb(tiocmget->urb, usb,
1467 usb_rcvintpipe(usb,
1468 tiocmget->endp->
1469 bEndpointAddress & 0x7F),
1470 &tiocmget->serial_state_notification,
1471 sizeof(struct hso_serial_state_notification),
1472 tiocmget_intr_callback, serial,
1473 tiocmget->endp->bInterval);
1474 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1475 if (result) {
1476 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1477 result);
1478 }
1479 return result;
1480
1481}
1482
1483static void tiocmget_intr_callback(struct urb *urb)
1484{
1485 struct hso_serial *serial = urb->context;
1486 struct hso_tiocmget *tiocmget;
1487 int status = urb->status;
1488 u16 UART_state_bitmap, prev_UART_state_bitmap;
1489 struct uart_icount *icount;
1490 struct hso_serial_state_notification *serial_state_notification;
1491 struct usb_device *usb;
1492
1493 /* Sanity checks */
1494 if (!serial)
1495 return;
1496 if (status) {
1497 handle_usb_error(status, __func__, serial->parent);
1498 return;
1499 }
1500 tiocmget = serial->tiocmget;
1501 if (!tiocmget)
1502 return;
1503 usb = serial->parent->usb;
1504 serial_state_notification = &tiocmget->serial_state_notification;
1505 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1506 serial_state_notification->bNotification != B_NOTIFICATION ||
1507 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1508 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1509 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1510 dev_warn(&usb->dev,
1511 "hso received invalid serial state notification\n");
1512 DUMP(serial_state_notification,
1513 sizeof(struct hso_serial_state_notification));
1514 } else {
1515
1516 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1517 UART_state_bitmap);
1518 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1519 icount = &tiocmget->icount;
1520 spin_lock(&serial->serial_lock);
1521 if ((UART_state_bitmap & B_OVERRUN) !=
1522 (prev_UART_state_bitmap & B_OVERRUN))
1523 icount->parity++;
1524 if ((UART_state_bitmap & B_PARITY) !=
1525 (prev_UART_state_bitmap & B_PARITY))
1526 icount->parity++;
1527 if ((UART_state_bitmap & B_FRAMING) !=
1528 (prev_UART_state_bitmap & B_FRAMING))
1529 icount->frame++;
1530 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1531 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1532 icount->rng++;
1533 if ((UART_state_bitmap & B_BREAK) !=
1534 (prev_UART_state_bitmap & B_BREAK))
1535 icount->brk++;
1536 if ((UART_state_bitmap & B_TX_CARRIER) !=
1537 (prev_UART_state_bitmap & B_TX_CARRIER))
1538 icount->dsr++;
1539 if ((UART_state_bitmap & B_RX_CARRIER) !=
1540 (prev_UART_state_bitmap & B_RX_CARRIER))
1541 icount->dcd++;
1542 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1543 spin_unlock(&serial->serial_lock);
1544 tiocmget->intr_completed = 1;
1545 wake_up_interruptible(&tiocmget->waitq);
1546 }
1547 memset(serial_state_notification, 0,
1548 sizeof(struct hso_serial_state_notification));
1549 tiocmget_submit_urb(serial,
1550 tiocmget,
1551 serial->parent->usb);
1552}
1553
1554/*
1555 * next few functions largely stolen from drivers/serial/serial_core.c
1556 */
1557/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1558 * - mask passed in arg for lines of interest
1559 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1560 * Caller should use TIOCGICOUNT to see which one it was
1561 */
1562static int
1563hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1564{
1565 DECLARE_WAITQUEUE(wait, current);
1566 struct uart_icount cprev, cnow;
1567 struct hso_tiocmget *tiocmget;
1568 int ret;
1569
1570 tiocmget = serial->tiocmget;
1571 if (!tiocmget)
1572 return -ENOENT;
1573 /*
1574 * note the counters on entry
1575 */
1576 spin_lock_irq(&serial->serial_lock);
1577 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1578 spin_unlock_irq(&serial->serial_lock);
1579 add_wait_queue(&tiocmget->waitq, &wait);
1580 for (;;) {
1581 spin_lock_irq(&serial->serial_lock);
1582 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1583 spin_unlock_irq(&serial->serial_lock);
1584 set_current_state(TASK_INTERRUPTIBLE);
1585 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1586 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1587 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1588 ret = 0;
1589 break;
1590 }
1591 schedule();
1592 /* see if a signal did it */
1593 if (signal_pending(current)) {
1594 ret = -ERESTARTSYS;
1595 break;
1596 }
1597 cprev = cnow;
1598 }
1599 current->state = TASK_RUNNING;
1600 remove_wait_queue(&tiocmget->waitq, &wait);
1601
1602 return ret;
1603}
1604
1605/*
1606 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1607 * Return: write counters to the user passed counter struct
1608 * NB: both 1->0 and 0->1 transitions are counted except for
1609 * RI where only 0->1 is counted.
1610 */
1611static int hso_get_count(struct tty_struct *tty,
1612 struct serial_icounter_struct *icount)
1613{
1614 struct uart_icount cnow;
1615 struct hso_serial *serial = tty->driver_data;
1616 struct hso_tiocmget *tiocmget = serial->tiocmget;
1617
1618 memset(icount, 0, sizeof(struct serial_icounter_struct));
1619
1620 if (!tiocmget)
1621 return -ENOENT;
1622 spin_lock_irq(&serial->serial_lock);
1623 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1624 spin_unlock_irq(&serial->serial_lock);
1625
1626 icount->cts = cnow.cts;
1627 icount->dsr = cnow.dsr;
1628 icount->rng = cnow.rng;
1629 icount->dcd = cnow.dcd;
1630 icount->rx = cnow.rx;
1631 icount->tx = cnow.tx;
1632 icount->frame = cnow.frame;
1633 icount->overrun = cnow.overrun;
1634 icount->parity = cnow.parity;
1635 icount->brk = cnow.brk;
1636 icount->buf_overrun = cnow.buf_overrun;
1637
1638 return 0;
1639}
1640
1641
1642static int hso_serial_tiocmget(struct tty_struct *tty)
1643{
1644 int retval;
1645 struct hso_serial *serial = tty->driver_data;
1646 struct hso_tiocmget *tiocmget;
1647 u16 UART_state_bitmap;
1648
1649 /* sanity check */
1650 if (!serial) {
1651 D1("no tty structures");
1652 return -EINVAL;
1653 }
1654 spin_lock_irq(&serial->serial_lock);
1655 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1656 ((serial->dtr_state) ? TIOCM_DTR : 0);
1657 tiocmget = serial->tiocmget;
1658 if (tiocmget) {
1659
1660 UART_state_bitmap = le16_to_cpu(
1661 tiocmget->prev_UART_state_bitmap);
1662 if (UART_state_bitmap & B_RING_SIGNAL)
1663 retval |= TIOCM_RNG;
1664 if (UART_state_bitmap & B_RX_CARRIER)
1665 retval |= TIOCM_CD;
1666 if (UART_state_bitmap & B_TX_CARRIER)
1667 retval |= TIOCM_DSR;
1668 }
1669 spin_unlock_irq(&serial->serial_lock);
1670 return retval;
1671}
1672
1673static int hso_serial_tiocmset(struct tty_struct *tty,
1674 unsigned int set, unsigned int clear)
1675{
1676 int val = 0;
1677 unsigned long flags;
1678 int if_num;
1679 struct hso_serial *serial = tty->driver_data;
1680
1681 /* sanity check */
1682 if (!serial) {
1683 D1("no tty structures");
1684 return -EINVAL;
1685 }
1686
1687 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1688 return -EINVAL;
1689
1690 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1691
1692 spin_lock_irqsave(&serial->serial_lock, flags);
1693 if (set & TIOCM_RTS)
1694 serial->rts_state = 1;
1695 if (set & TIOCM_DTR)
1696 serial->dtr_state = 1;
1697
1698 if (clear & TIOCM_RTS)
1699 serial->rts_state = 0;
1700 if (clear & TIOCM_DTR)
1701 serial->dtr_state = 0;
1702
1703 if (serial->dtr_state)
1704 val |= 0x01;
1705 if (serial->rts_state)
1706 val |= 0x02;
1707
1708 spin_unlock_irqrestore(&serial->serial_lock, flags);
1709
1710 return usb_control_msg(serial->parent->usb,
1711 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1712 0x21, val, if_num, NULL, 0,
1713 USB_CTRL_SET_TIMEOUT);
1714}
1715
1716static int hso_serial_ioctl(struct tty_struct *tty,
1717 unsigned int cmd, unsigned long arg)
1718{
1719 struct hso_serial *serial = tty->driver_data;
1720 int ret = 0;
1721 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1722
1723 if (!serial)
1724 return -ENODEV;
1725 switch (cmd) {
1726 case TIOCMIWAIT:
1727 ret = hso_wait_modem_status(serial, arg);
1728 break;
1729 default:
1730 ret = -ENOIOCTLCMD;
1731 break;
1732 }
1733 return ret;
1734}
1735
1736
1737/* starts a transmit */
1738static void hso_kick_transmit(struct hso_serial *serial)
1739{
1740 u8 *temp;
1741 unsigned long flags;
1742 int res;
1743
1744 spin_lock_irqsave(&serial->serial_lock, flags);
1745 if (!serial->tx_buffer_count)
1746 goto out;
1747
1748 if (serial->tx_urb_used)
1749 goto out;
1750
1751 /* Wakeup USB interface if necessary */
1752 if (hso_get_activity(serial->parent) == -EAGAIN)
1753 goto out;
1754
1755 /* Switch pointers around to avoid memcpy */
1756 temp = serial->tx_buffer;
1757 serial->tx_buffer = serial->tx_data;
1758 serial->tx_data = temp;
1759 serial->tx_data_count = serial->tx_buffer_count;
1760 serial->tx_buffer_count = 0;
1761
1762 /* If temp is set, it means we switched buffers */
1763 if (temp && serial->write_data) {
1764 res = serial->write_data(serial);
1765 if (res >= 0)
1766 serial->tx_urb_used = 1;
1767 }
1768out:
1769 spin_unlock_irqrestore(&serial->serial_lock, flags);
1770}
1771
1772/* make a request (for reading and writing data to muxed serial port) */
1773static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1774 struct urb *ctrl_urb,
1775 struct usb_ctrlrequest *ctrl_req,
1776 u8 *ctrl_urb_data, u32 size)
1777{
1778 int result;
1779 int pipe;
1780
1781 /* Sanity check */
1782 if (!serial || !ctrl_urb || !ctrl_req) {
1783 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1784 return -EINVAL;
1785 }
1786
1787 /* initialize */
1788 ctrl_req->wValue = 0;
1789 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1790 ctrl_req->wLength = cpu_to_le16(size);
1791
1792 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1793 /* Reading command */
1794 ctrl_req->bRequestType = USB_DIR_IN |
1795 USB_TYPE_OPTION_VENDOR |
1796 USB_RECIP_INTERFACE;
1797 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1798 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1799 } else {
1800 /* Writing command */
1801 ctrl_req->bRequestType = USB_DIR_OUT |
1802 USB_TYPE_OPTION_VENDOR |
1803 USB_RECIP_INTERFACE;
1804 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1805 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1806 }
1807 /* syslog */
1808 D2("%s command (%02x) len: %d, port: %d",
1809 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1810 ctrl_req->bRequestType, ctrl_req->wLength, port);
1811
1812 /* Load ctrl urb */
1813 ctrl_urb->transfer_flags = 0;
1814 usb_fill_control_urb(ctrl_urb,
1815 serial->parent->usb,
1816 pipe,
1817 (u8 *) ctrl_req,
1818 ctrl_urb_data, size, ctrl_callback, serial);
1819 /* Send it on merry way */
1820 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1821 if (result) {
1822 dev_err(&ctrl_urb->dev->dev,
1823 "%s failed submit ctrl_urb %d type %d\n", __func__,
1824 result, type);
1825 return result;
1826 }
1827
1828 /* done */
1829 return size;
1830}
1831
1832/* called by intr_callback when read occurs */
1833static int hso_mux_serial_read(struct hso_serial *serial)
1834{
1835 if (!serial)
1836 return -EINVAL;
1837
1838 /* clean data */
1839 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1840 /* make the request */
1841
1842 if (serial->num_rx_urbs != 1) {
1843 dev_err(&serial->parent->interface->dev,
1844 "ERROR: mux'd reads with multiple buffers "
1845 "not possible\n");
1846 return 0;
1847 }
1848 return mux_device_request(serial,
1849 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1850 serial->parent->port_spec & HSO_PORT_MASK,
1851 serial->rx_urb[0],
1852 &serial->ctrl_req_rx,
1853 serial->rx_data[0], serial->rx_data_length);
1854}
1855
1856/* used for muxed serial port callback (muxed serial read) */
1857static void intr_callback(struct urb *urb)
1858{
1859 struct hso_shared_int *shared_int = urb->context;
1860 struct hso_serial *serial;
1861 unsigned char *port_req;
1862 int status = urb->status;
1863 int i;
1864
1865 usb_mark_last_busy(urb->dev);
1866
1867 /* sanity check */
1868 if (!shared_int)
1869 return;
1870
1871 /* status check */
1872 if (status) {
1873 handle_usb_error(status, __func__, NULL);
1874 return;
1875 }
1876 D4("\n--- Got intr callback 0x%02X ---", status);
1877
1878 /* what request? */
1879 port_req = urb->transfer_buffer;
1880 D4(" port_req = 0x%.2X\n", *port_req);
1881 /* loop over all muxed ports to find the one sending this */
1882 for (i = 0; i < 8; i++) {
1883 /* max 8 channels on MUX */
1884 if (*port_req & (1 << i)) {
1885 serial = get_serial_by_shared_int_and_type(shared_int,
1886 (1 << i));
1887 if (serial != NULL) {
1888 D1("Pending read interrupt on port %d\n", i);
1889 spin_lock(&serial->serial_lock);
1890 if (serial->rx_state == RX_IDLE &&
1891 serial->port.count > 0) {
1892 /* Setup and send a ctrl req read on
1893 * port i */
1894 if (!serial->rx_urb_filled[0]) {
1895 serial->rx_state = RX_SENT;
1896 hso_mux_serial_read(serial);
1897 } else
1898 serial->rx_state = RX_PENDING;
1899 } else {
1900 D1("Already a read pending on "
1901 "port %d or port not open\n", i);
1902 }
1903 spin_unlock(&serial->serial_lock);
1904 }
1905 }
1906 }
1907 /* Resubmit interrupt urb */
1908 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1909}
1910
1911/* called for writing to muxed serial port */
1912static int hso_mux_serial_write_data(struct hso_serial *serial)
1913{
1914 if (NULL == serial)
1915 return -EINVAL;
1916
1917 return mux_device_request(serial,
1918 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1919 serial->parent->port_spec & HSO_PORT_MASK,
1920 serial->tx_urb,
1921 &serial->ctrl_req_tx,
1922 serial->tx_data, serial->tx_data_count);
1923}
1924
1925/* write callback for Diag and CS port */
1926static void hso_std_serial_write_bulk_callback(struct urb *urb)
1927{
1928 struct hso_serial *serial = urb->context;
1929 int status = urb->status;
1930 struct tty_struct *tty;
1931
1932 /* sanity check */
1933 if (!serial) {
1934 D1("serial == NULL");
1935 return;
1936 }
1937
1938 spin_lock(&serial->serial_lock);
1939 serial->tx_urb_used = 0;
1940 spin_unlock(&serial->serial_lock);
1941 if (status) {
1942 handle_usb_error(status, __func__, serial->parent);
1943 return;
1944 }
1945 hso_put_activity(serial->parent);
1946 tty = tty_port_tty_get(&serial->port);
1947 if (tty) {
1948 tty_wakeup(tty);
1949 tty_kref_put(tty);
1950 }
1951 hso_kick_transmit(serial);
1952
1953 D1(" ");
1954}
1955
1956/* called for writing diag or CS serial port */
1957static int hso_std_serial_write_data(struct hso_serial *serial)
1958{
1959 int count = serial->tx_data_count;
1960 int result;
1961
1962 usb_fill_bulk_urb(serial->tx_urb,
1963 serial->parent->usb,
1964 usb_sndbulkpipe(serial->parent->usb,
1965 serial->out_endp->
1966 bEndpointAddress & 0x7F),
1967 serial->tx_data, serial->tx_data_count,
1968 hso_std_serial_write_bulk_callback, serial);
1969
1970 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1971 if (result) {
1972 dev_warn(&serial->parent->usb->dev,
1973 "Failed to submit urb - res %d\n", result);
1974 return result;
1975 }
1976
1977 return count;
1978}
1979
1980/* callback after read or write on muxed serial port */
1981static void ctrl_callback(struct urb *urb)
1982{
1983 struct hso_serial *serial = urb->context;
1984 struct usb_ctrlrequest *req;
1985 int status = urb->status;
1986
1987 /* sanity check */
1988 if (!serial)
1989 return;
1990
1991 spin_lock(&serial->serial_lock);
1992 serial->tx_urb_used = 0;
1993 spin_unlock(&serial->serial_lock);
1994 if (status) {
1995 handle_usb_error(status, __func__, serial->parent);
1996 return;
1997 }
1998
1999 /* what request? */
2000 req = (struct usb_ctrlrequest *)(urb->setup_packet);
2001 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2002 D4("Actual length of urb = %d\n", urb->actual_length);
2003 DUMP1(urb->transfer_buffer, urb->actual_length);
2004
2005 if (req->bRequestType ==
2006 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2007 /* response to a read command */
2008 serial->rx_urb_filled[0] = 1;
2009 spin_lock(&serial->serial_lock);
2010 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2011 spin_unlock(&serial->serial_lock);
2012 } else {
2013 struct tty_struct *tty = tty_port_tty_get(&serial->port);
2014 hso_put_activity(serial->parent);
2015 if (tty) {
2016 tty_wakeup(tty);
2017 tty_kref_put(tty);
2018 }
2019 /* response to a write command */
2020 hso_kick_transmit(serial);
2021 }
2022}
2023
2024/* handle RX data for serial port */
2025static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2026{
2027 struct tty_struct *tty;
2028 int write_length_remaining = 0;
2029 int curr_write_len;
2030
2031 /* Sanity check */
2032 if (urb == NULL || serial == NULL) {
2033 D1("serial = NULL");
2034 return -2;
2035 }
2036
2037 tty = tty_port_tty_get(&serial->port);
2038
2039 /* Push data to tty */
2040 if (tty) {
2041 write_length_remaining = urb->actual_length -
2042 serial->curr_rx_urb_offset;
2043 D1("data to push to tty");
2044 while (write_length_remaining) {
2045 if (test_bit(TTY_THROTTLED, &tty->flags)) {
2046 tty_kref_put(tty);
2047 return -1;
2048 }
2049 curr_write_len = tty_insert_flip_string
2050 (tty, urb->transfer_buffer +
2051 serial->curr_rx_urb_offset,
2052 write_length_remaining);
2053 serial->curr_rx_urb_offset += curr_write_len;
2054 write_length_remaining -= curr_write_len;
2055 tty_flip_buffer_push(tty);
2056 }
2057 tty_kref_put(tty);
2058 }
2059 if (write_length_remaining == 0) {
2060 serial->curr_rx_urb_offset = 0;
2061 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2062 }
2063 return write_length_remaining;
2064}
2065
2066
2067/* Base driver functions */
2068
2069static void hso_log_port(struct hso_device *hso_dev)
2070{
2071 char *port_type;
2072 char port_dev[20];
2073
2074 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2075 case HSO_PORT_CONTROL:
2076 port_type = "Control";
2077 break;
2078 case HSO_PORT_APP:
2079 port_type = "Application";
2080 break;
2081 case HSO_PORT_GPS:
2082 port_type = "GPS";
2083 break;
2084 case HSO_PORT_GPS_CONTROL:
2085 port_type = "GPS control";
2086 break;
2087 case HSO_PORT_APP2:
2088 port_type = "Application2";
2089 break;
2090 case HSO_PORT_PCSC:
2091 port_type = "PCSC";
2092 break;
2093 case HSO_PORT_DIAG:
2094 port_type = "Diagnostic";
2095 break;
2096 case HSO_PORT_DIAG2:
2097 port_type = "Diagnostic2";
2098 break;
2099 case HSO_PORT_MODEM:
2100 port_type = "Modem";
2101 break;
2102 case HSO_PORT_NETWORK:
2103 port_type = "Network";
2104 break;
2105 default:
2106 port_type = "Unknown";
2107 break;
2108 }
2109 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2110 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2111 } else
2112 sprintf(port_dev, "/dev/%s%d", tty_filename,
2113 dev2ser(hso_dev)->minor);
2114
2115 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2116 port_type, port_dev);
2117}
2118
2119static int hso_start_net_device(struct hso_device *hso_dev)
2120{
2121 int i, result = 0;
2122 struct hso_net *hso_net = dev2net(hso_dev);
2123
2124 if (!hso_net)
2125 return -ENODEV;
2126
2127 /* send URBs for all read buffers */
2128 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2129
2130 /* Prep a receive URB */
2131 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2132 hso_dev->usb,
2133 usb_rcvbulkpipe(hso_dev->usb,
2134 hso_net->in_endp->
2135 bEndpointAddress & 0x7F),
2136 hso_net->mux_bulk_rx_buf_pool[i],
2137 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2138 hso_net);
2139
2140 /* Put it out there so the device can send us stuff */
2141 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2142 GFP_NOIO);
2143 if (result)
2144 dev_warn(&hso_dev->usb->dev,
2145 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2146 i, result);
2147 }
2148
2149 return result;
2150}
2151
2152static int hso_stop_net_device(struct hso_device *hso_dev)
2153{
2154 int i;
2155 struct hso_net *hso_net = dev2net(hso_dev);
2156
2157 if (!hso_net)
2158 return -ENODEV;
2159
2160 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2161 if (hso_net->mux_bulk_rx_urb_pool[i])
2162 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2163
2164 }
2165 if (hso_net->mux_bulk_tx_urb)
2166 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2167
2168 return 0;
2169}
2170
2171static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2172{
2173 int i, result = 0;
2174 struct hso_serial *serial = dev2ser(hso_dev);
2175
2176 if (!serial)
2177 return -ENODEV;
2178
2179 /* If it is not the MUX port fill in and submit a bulk urb (already
2180 * allocated in hso_serial_start) */
2181 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2182 for (i = 0; i < serial->num_rx_urbs; i++) {
2183 usb_fill_bulk_urb(serial->rx_urb[i],
2184 serial->parent->usb,
2185 usb_rcvbulkpipe(serial->parent->usb,
2186 serial->in_endp->
2187 bEndpointAddress &
2188 0x7F),
2189 serial->rx_data[i],
2190 serial->rx_data_length,
2191 hso_std_serial_read_bulk_callback,
2192 serial);
2193 result = usb_submit_urb(serial->rx_urb[i], flags);
2194 if (result) {
2195 dev_warn(&serial->parent->usb->dev,
2196 "Failed to submit urb - res %d\n",
2197 result);
2198 break;
2199 }
2200 }
2201 } else {
2202 mutex_lock(&serial->shared_int->shared_int_lock);
2203 if (!serial->shared_int->use_count) {
2204 result =
2205 hso_mux_submit_intr_urb(serial->shared_int,
2206 hso_dev->usb, flags);
2207 }
2208 serial->shared_int->use_count++;
2209 mutex_unlock(&serial->shared_int->shared_int_lock);
2210 }
2211 if (serial->tiocmget)
2212 tiocmget_submit_urb(serial,
2213 serial->tiocmget,
2214 serial->parent->usb);
2215 return result;
2216}
2217
2218static int hso_stop_serial_device(struct hso_device *hso_dev)
2219{
2220 int i;
2221 struct hso_serial *serial = dev2ser(hso_dev);
2222 struct hso_tiocmget *tiocmget;
2223
2224 if (!serial)
2225 return -ENODEV;
2226
2227 for (i = 0; i < serial->num_rx_urbs; i++) {
2228 if (serial->rx_urb[i]) {
2229 usb_kill_urb(serial->rx_urb[i]);
2230 serial->rx_urb_filled[i] = 0;
2231 }
2232 }
2233 serial->curr_rx_urb_idx = 0;
2234 serial->curr_rx_urb_offset = 0;
2235
2236 if (serial->tx_urb)
2237 usb_kill_urb(serial->tx_urb);
2238
2239 if (serial->shared_int) {
2240 mutex_lock(&serial->shared_int->shared_int_lock);
2241 if (serial->shared_int->use_count &&
2242 (--serial->shared_int->use_count == 0)) {
2243 struct urb *urb;
2244
2245 urb = serial->shared_int->shared_intr_urb;
2246 if (urb)
2247 usb_kill_urb(urb);
2248 }
2249 mutex_unlock(&serial->shared_int->shared_int_lock);
2250 }
2251 tiocmget = serial->tiocmget;
2252 if (tiocmget) {
2253 wake_up_interruptible(&tiocmget->waitq);
2254 usb_kill_urb(tiocmget->urb);
2255 }
2256
2257 return 0;
2258}
2259
2260static void hso_serial_common_free(struct hso_serial *serial)
2261{
2262 int i;
2263
2264 if (serial->parent->dev)
2265 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2266
2267 tty_unregister_device(tty_drv, serial->minor);
2268
2269 for (i = 0; i < serial->num_rx_urbs; i++) {
2270 /* unlink and free RX URB */
2271 usb_free_urb(serial->rx_urb[i]);
2272 /* free the RX buffer */
2273 kfree(serial->rx_data[i]);
2274 }
2275
2276 /* unlink and free TX URB */
2277 usb_free_urb(serial->tx_urb);
2278 kfree(serial->tx_data);
2279}
2280
2281static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2282 int rx_size, int tx_size)
2283{
2284 struct device *dev;
2285 int minor;
2286 int i;
2287
2288 minor = get_free_serial_index();
2289 if (minor < 0)
2290 goto exit;
2291
2292 /* register our minor number */
2293 serial->parent->dev = tty_register_device(tty_drv, minor,
2294 &serial->parent->interface->dev);
2295 dev = serial->parent->dev;
2296 dev_set_drvdata(dev, serial->parent);
2297 i = device_create_file(dev, &dev_attr_hsotype);
2298
2299 /* fill in specific data for later use */
2300 serial->minor = minor;
2301 serial->magic = HSO_SERIAL_MAGIC;
2302 spin_lock_init(&serial->serial_lock);
2303 tty_port_init(&serial->port);
2304 serial->num_rx_urbs = num_urbs;
2305
2306 /* RX, allocate urb and initialize */
2307
2308 /* prepare our RX buffer */
2309 serial->rx_data_length = rx_size;
2310 for (i = 0; i < serial->num_rx_urbs; i++) {
2311 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2312 if (!serial->rx_urb[i]) {
2313 dev_err(dev, "Could not allocate urb?\n");
2314 goto exit;
2315 }
2316 serial->rx_urb[i]->transfer_buffer = NULL;
2317 serial->rx_urb[i]->transfer_buffer_length = 0;
2318 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2319 GFP_KERNEL);
2320 if (!serial->rx_data[i]) {
2321 dev_err(dev, "%s - Out of memory\n", __func__);
2322 goto exit;
2323 }
2324 }
2325
2326 /* TX, allocate urb and initialize */
2327 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2328 if (!serial->tx_urb) {
2329 dev_err(dev, "Could not allocate urb?\n");
2330 goto exit;
2331 }
2332 serial->tx_urb->transfer_buffer = NULL;
2333 serial->tx_urb->transfer_buffer_length = 0;
2334 /* prepare our TX buffer */
2335 serial->tx_data_count = 0;
2336 serial->tx_buffer_count = 0;
2337 serial->tx_data_length = tx_size;
2338 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2339 if (!serial->tx_data) {
2340 dev_err(dev, "%s - Out of memory\n", __func__);
2341 goto exit;
2342 }
2343 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2344 if (!serial->tx_buffer) {
2345 dev_err(dev, "%s - Out of memory\n", __func__);
2346 goto exit;
2347 }
2348
2349 return 0;
2350exit:
2351 hso_serial_common_free(serial);
2352 return -1;
2353}
2354
2355/* Creates a general hso device */
2356static struct hso_device *hso_create_device(struct usb_interface *intf,
2357 int port_spec)
2358{
2359 struct hso_device *hso_dev;
2360
2361 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2362 if (!hso_dev)
2363 return NULL;
2364
2365 hso_dev->port_spec = port_spec;
2366 hso_dev->usb = interface_to_usbdev(intf);
2367 hso_dev->interface = intf;
2368 kref_init(&hso_dev->ref);
2369 mutex_init(&hso_dev->mutex);
2370
2371 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2372 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2373 INIT_WORK(&hso_dev->reset_device, reset_device);
2374
2375 return hso_dev;
2376}
2377
2378/* Removes a network device in the network device table */
2379static int remove_net_device(struct hso_device *hso_dev)
2380{
2381 int i;
2382
2383 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2384 if (network_table[i] == hso_dev) {
2385 network_table[i] = NULL;
2386 break;
2387 }
2388 }
2389 if (i == HSO_MAX_NET_DEVICES)
2390 return -1;
2391 return 0;
2392}
2393
2394/* Frees our network device */
2395static void hso_free_net_device(struct hso_device *hso_dev)
2396{
2397 int i;
2398 struct hso_net *hso_net = dev2net(hso_dev);
2399
2400 if (!hso_net)
2401 return;
2402
2403 remove_net_device(hso_net->parent);
2404
2405 if (hso_net->net)
2406 unregister_netdev(hso_net->net);
2407
2408 /* start freeing */
2409 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2410 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2411 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2412 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2413 }
2414 usb_free_urb(hso_net->mux_bulk_tx_urb);
2415 kfree(hso_net->mux_bulk_tx_buf);
2416 hso_net->mux_bulk_tx_buf = NULL;
2417
2418 if (hso_net->net)
2419 free_netdev(hso_net->net);
2420
2421 kfree(hso_dev);
2422}
2423
2424static const struct net_device_ops hso_netdev_ops = {
2425 .ndo_open = hso_net_open,
2426 .ndo_stop = hso_net_close,
2427 .ndo_start_xmit = hso_net_start_xmit,
2428 .ndo_tx_timeout = hso_net_tx_timeout,
2429};
2430
2431/* initialize the network interface */
2432static void hso_net_init(struct net_device *net)
2433{
2434 struct hso_net *hso_net = netdev_priv(net);
2435
2436 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2437
2438 /* fill in the other fields */
2439 net->netdev_ops = &hso_netdev_ops;
2440 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2441 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2442 net->type = ARPHRD_NONE;
2443 net->mtu = DEFAULT_MTU - 14;
2444 net->tx_queue_len = 10;
2445 SET_ETHTOOL_OPS(net, &ops);
2446
2447 /* and initialize the semaphore */
2448 spin_lock_init(&hso_net->net_lock);
2449}
2450
2451/* Adds a network device in the network device table */
2452static int add_net_device(struct hso_device *hso_dev)
2453{
2454 int i;
2455
2456 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2457 if (network_table[i] == NULL) {
2458 network_table[i] = hso_dev;
2459 break;
2460 }
2461 }
2462 if (i == HSO_MAX_NET_DEVICES)
2463 return -1;
2464 return 0;
2465}
2466
2467static int hso_rfkill_set_block(void *data, bool blocked)
2468{
2469 struct hso_device *hso_dev = data;
2470 int enabled = !blocked;
2471 int rv;
2472
2473 mutex_lock(&hso_dev->mutex);
2474 if (hso_dev->usb_gone)
2475 rv = 0;
2476 else
2477 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2478 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2479 USB_CTRL_SET_TIMEOUT);
2480 mutex_unlock(&hso_dev->mutex);
2481 return rv;
2482}
2483
2484static const struct rfkill_ops hso_rfkill_ops = {
2485 .set_block = hso_rfkill_set_block,
2486};
2487
2488/* Creates and sets up everything for rfkill */
2489static void hso_create_rfkill(struct hso_device *hso_dev,
2490 struct usb_interface *interface)
2491{
2492 struct hso_net *hso_net = dev2net(hso_dev);
2493 struct device *dev = &hso_net->net->dev;
2494 char *rfkn;
2495
2496 rfkn = kzalloc(20, GFP_KERNEL);
2497 if (!rfkn)
2498 dev_err(dev, "%s - Out of memory\n", __func__);
2499
2500 snprintf(rfkn, 20, "hso-%d",
2501 interface->altsetting->desc.bInterfaceNumber);
2502
2503 hso_net->rfkill = rfkill_alloc(rfkn,
2504 &interface_to_usbdev(interface)->dev,
2505 RFKILL_TYPE_WWAN,
2506 &hso_rfkill_ops, hso_dev);
2507 if (!hso_net->rfkill) {
2508 dev_err(dev, "%s - Out of memory\n", __func__);
2509 kfree(rfkn);
2510 return;
2511 }
2512 if (rfkill_register(hso_net->rfkill) < 0) {
2513 rfkill_destroy(hso_net->rfkill);
2514 kfree(rfkn);
2515 hso_net->rfkill = NULL;
2516 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2517 return;
2518 }
2519}
2520
2521static struct device_type hso_type = {
2522 .name = "wwan",
2523};
2524
2525/* Creates our network device */
2526static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2527 int port_spec)
2528{
2529 int result, i;
2530 struct net_device *net;
2531 struct hso_net *hso_net;
2532 struct hso_device *hso_dev;
2533
2534 hso_dev = hso_create_device(interface, port_spec);
2535 if (!hso_dev)
2536 return NULL;
2537
2538 /* allocate our network device, then we can put in our private data */
2539 /* call hso_net_init to do the basic initialization */
2540 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2541 if (!net) {
2542 dev_err(&interface->dev, "Unable to create ethernet device\n");
2543 goto exit;
2544 }
2545
2546 hso_net = netdev_priv(net);
2547
2548 hso_dev->port_data.dev_net = hso_net;
2549 hso_net->net = net;
2550 hso_net->parent = hso_dev;
2551
2552 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2553 USB_DIR_IN);
2554 if (!hso_net->in_endp) {
2555 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2556 goto exit;
2557 }
2558 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2559 USB_DIR_OUT);
2560 if (!hso_net->out_endp) {
2561 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2562 goto exit;
2563 }
2564 SET_NETDEV_DEV(net, &interface->dev);
2565 SET_NETDEV_DEVTYPE(net, &hso_type);
2566
2567 /* registering our net device */
2568 result = register_netdev(net);
2569 if (result) {
2570 dev_err(&interface->dev, "Failed to register device\n");
2571 goto exit;
2572 }
2573
2574 /* start allocating */
2575 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2576 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2577 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2578 dev_err(&interface->dev, "Could not allocate rx urb\n");
2579 goto exit;
2580 }
2581 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2582 GFP_KERNEL);
2583 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2584 dev_err(&interface->dev, "Could not allocate rx buf\n");
2585 goto exit;
2586 }
2587 }
2588 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2589 if (!hso_net->mux_bulk_tx_urb) {
2590 dev_err(&interface->dev, "Could not allocate tx urb\n");
2591 goto exit;
2592 }
2593 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2594 if (!hso_net->mux_bulk_tx_buf) {
2595 dev_err(&interface->dev, "Could not allocate tx buf\n");
2596 goto exit;
2597 }
2598
2599 add_net_device(hso_dev);
2600
2601 hso_log_port(hso_dev);
2602
2603 hso_create_rfkill(hso_dev, interface);
2604
2605 return hso_dev;
2606exit:
2607 hso_free_net_device(hso_dev);
2608 return NULL;
2609}
2610
2611static void hso_free_tiomget(struct hso_serial *serial)
2612{
2613 struct hso_tiocmget *tiocmget;
2614 if (!serial)
2615 return;
2616 tiocmget = serial->tiocmget;
2617 if (tiocmget) {
2618 usb_free_urb(tiocmget->urb);
2619 tiocmget->urb = NULL;
2620 serial->tiocmget = NULL;
2621 kfree(tiocmget);
2622 }
2623}
2624
2625/* Frees an AT channel ( goes for both mux and non-mux ) */
2626static void hso_free_serial_device(struct hso_device *hso_dev)
2627{
2628 struct hso_serial *serial = dev2ser(hso_dev);
2629
2630 if (!serial)
2631 return;
2632 set_serial_by_index(serial->minor, NULL);
2633
2634 hso_serial_common_free(serial);
2635
2636 if (serial->shared_int) {
2637 mutex_lock(&serial->shared_int->shared_int_lock);
2638 if (--serial->shared_int->ref_count == 0)
2639 hso_free_shared_int(serial->shared_int);
2640 else
2641 mutex_unlock(&serial->shared_int->shared_int_lock);
2642 }
2643 hso_free_tiomget(serial);
2644 kfree(serial);
2645 kfree(hso_dev);
2646}
2647
2648/* Creates a bulk AT channel */
2649static struct hso_device *hso_create_bulk_serial_device(
2650 struct usb_interface *interface, int port)
2651{
2652 struct hso_device *hso_dev;
2653 struct hso_serial *serial;
2654 int num_urbs;
2655 struct hso_tiocmget *tiocmget;
2656
2657 hso_dev = hso_create_device(interface, port);
2658 if (!hso_dev)
2659 return NULL;
2660
2661 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2662 if (!serial)
2663 goto exit;
2664
2665 serial->parent = hso_dev;
2666 hso_dev->port_data.dev_serial = serial;
2667
2668 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2669 num_urbs = 2;
2670 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2671 GFP_KERNEL);
2672 /* it isn't going to break our heart if serial->tiocmget
2673 * allocation fails don't bother checking this.
2674 */
2675 if (serial->tiocmget) {
2676 tiocmget = serial->tiocmget;
2677 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2678 if (tiocmget->urb) {
2679 mutex_init(&tiocmget->mutex);
2680 init_waitqueue_head(&tiocmget->waitq);
2681 tiocmget->endp = hso_get_ep(
2682 interface,
2683 USB_ENDPOINT_XFER_INT,
2684 USB_DIR_IN);
2685 } else
2686 hso_free_tiomget(serial);
2687 }
2688 }
2689 else
2690 num_urbs = 1;
2691
2692 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2693 BULK_URB_TX_SIZE))
2694 goto exit;
2695
2696 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2697 USB_DIR_IN);
2698 if (!serial->in_endp) {
2699 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2700 goto exit2;
2701 }
2702
2703 if (!
2704 (serial->out_endp =
2705 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2706 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2707 goto exit2;
2708 }
2709
2710 serial->write_data = hso_std_serial_write_data;
2711
2712 /* and record this serial */
2713 set_serial_by_index(serial->minor, serial);
2714
2715 /* setup the proc dirs and files if needed */
2716 hso_log_port(hso_dev);
2717
2718 /* done, return it */
2719 return hso_dev;
2720
2721exit2:
2722 hso_serial_common_free(serial);
2723exit:
2724 hso_free_tiomget(serial);
2725 kfree(serial);
2726 kfree(hso_dev);
2727 return NULL;
2728}
2729
2730/* Creates a multiplexed AT channel */
2731static
2732struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2733 int port,
2734 struct hso_shared_int *mux)
2735{
2736 struct hso_device *hso_dev;
2737 struct hso_serial *serial;
2738 int port_spec;
2739
2740 port_spec = HSO_INTF_MUX;
2741 port_spec &= ~HSO_PORT_MASK;
2742
2743 port_spec |= hso_mux_to_port(port);
2744 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2745 return NULL;
2746
2747 hso_dev = hso_create_device(interface, port_spec);
2748 if (!hso_dev)
2749 return NULL;
2750
2751 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2752 if (!serial)
2753 goto exit;
2754
2755 hso_dev->port_data.dev_serial = serial;
2756 serial->parent = hso_dev;
2757
2758 if (hso_serial_common_create
2759 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2760 goto exit;
2761
2762 serial->tx_data_length--;
2763 serial->write_data = hso_mux_serial_write_data;
2764
2765 serial->shared_int = mux;
2766 mutex_lock(&serial->shared_int->shared_int_lock);
2767 serial->shared_int->ref_count++;
2768 mutex_unlock(&serial->shared_int->shared_int_lock);
2769
2770 /* and record this serial */
2771 set_serial_by_index(serial->minor, serial);
2772
2773 /* setup the proc dirs and files if needed */
2774 hso_log_port(hso_dev);
2775
2776 /* done, return it */
2777 return hso_dev;
2778
2779exit:
2780 if (serial) {
2781 tty_unregister_device(tty_drv, serial->minor);
2782 kfree(serial);
2783 }
2784 if (hso_dev)
2785 kfree(hso_dev);
2786 return NULL;
2787
2788}
2789
2790static void hso_free_shared_int(struct hso_shared_int *mux)
2791{
2792 usb_free_urb(mux->shared_intr_urb);
2793 kfree(mux->shared_intr_buf);
2794 mutex_unlock(&mux->shared_int_lock);
2795 kfree(mux);
2796}
2797
2798static
2799struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2800{
2801 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2802
2803 if (!mux)
2804 return NULL;
2805
2806 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2807 USB_DIR_IN);
2808 if (!mux->intr_endp) {
2809 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2810 goto exit;
2811 }
2812
2813 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2814 if (!mux->shared_intr_urb) {
2815 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2816 goto exit;
2817 }
2818 mux->shared_intr_buf =
2819 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2820 GFP_KERNEL);
2821 if (!mux->shared_intr_buf) {
2822 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2823 goto exit;
2824 }
2825
2826 mutex_init(&mux->shared_int_lock);
2827
2828 return mux;
2829
2830exit:
2831 kfree(mux->shared_intr_buf);
2832 usb_free_urb(mux->shared_intr_urb);
2833 kfree(mux);
2834 return NULL;
2835}
2836
2837/* Gets the port spec for a certain interface */
2838static int hso_get_config_data(struct usb_interface *interface)
2839{
2840 struct usb_device *usbdev = interface_to_usbdev(interface);
2841 u8 config_data[17];
2842 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2843 s32 result;
2844
2845 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2846 0x86, 0xC0, 0, 0, config_data, 17,
2847 USB_CTRL_SET_TIMEOUT) != 0x11) {
2848 return -EIO;
2849 }
2850
2851 switch (config_data[if_num]) {
2852 case 0x0:
2853 result = 0;
2854 break;
2855 case 0x1:
2856 result = HSO_PORT_DIAG;
2857 break;
2858 case 0x2:
2859 result = HSO_PORT_GPS;
2860 break;
2861 case 0x3:
2862 result = HSO_PORT_GPS_CONTROL;
2863 break;
2864 case 0x4:
2865 result = HSO_PORT_APP;
2866 break;
2867 case 0x5:
2868 result = HSO_PORT_APP2;
2869 break;
2870 case 0x6:
2871 result = HSO_PORT_CONTROL;
2872 break;
2873 case 0x7:
2874 result = HSO_PORT_NETWORK;
2875 break;
2876 case 0x8:
2877 result = HSO_PORT_MODEM;
2878 break;
2879 case 0x9:
2880 result = HSO_PORT_MSD;
2881 break;
2882 case 0xa:
2883 result = HSO_PORT_PCSC;
2884 break;
2885 case 0xb:
2886 result = HSO_PORT_VOICE;
2887 break;
2888 default:
2889 result = 0;
2890 }
2891
2892 if (result)
2893 result |= HSO_INTF_BULK;
2894
2895 if (config_data[16] & 0x1)
2896 result |= HSO_INFO_CRC_BUG;
2897
2898 return result;
2899}
2900
2901/* called once for each interface upon device insertion */
2902static int hso_probe(struct usb_interface *interface,
2903 const struct usb_device_id *id)
2904{
2905 int mux, i, if_num, port_spec;
2906 unsigned char port_mask;
2907 struct hso_device *hso_dev = NULL;
2908 struct hso_shared_int *shared_int;
2909 struct hso_device *tmp_dev = NULL;
2910
2911 if_num = interface->altsetting->desc.bInterfaceNumber;
2912
2913 /* Get the interface/port specification from either driver_info or from
2914 * the device itself */
2915 if (id->driver_info)
2916 port_spec = ((u32 *)(id->driver_info))[if_num];
2917 else
2918 port_spec = hso_get_config_data(interface);
2919
2920 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2921 dev_err(&interface->dev, "Not our interface\n");
2922 return -ENODEV;
2923 }
2924 /* Check if we need to switch to alt interfaces prior to port
2925 * configuration */
2926 if (interface->num_altsetting > 1)
2927 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2928 interface->needs_remote_wakeup = 1;
2929
2930 /* Allocate new hso device(s) */
2931 switch (port_spec & HSO_INTF_MASK) {
2932 case HSO_INTF_MUX:
2933 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2934 /* Create the network device */
2935 if (!disable_net) {
2936 hso_dev = hso_create_net_device(interface,
2937 port_spec);
2938 if (!hso_dev)
2939 goto exit;
2940 tmp_dev = hso_dev;
2941 }
2942 }
2943
2944 if (hso_get_mux_ports(interface, &port_mask))
2945 /* TODO: de-allocate everything */
2946 goto exit;
2947
2948 shared_int = hso_create_shared_int(interface);
2949 if (!shared_int)
2950 goto exit;
2951
2952 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2953 if (port_mask & i) {
2954 hso_dev = hso_create_mux_serial_device(
2955 interface, i, shared_int);
2956 if (!hso_dev)
2957 goto exit;
2958 }
2959 }
2960
2961 if (tmp_dev)
2962 hso_dev = tmp_dev;
2963 break;
2964
2965 case HSO_INTF_BULK:
2966 /* It's a regular bulk interface */
2967 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2968 if (!disable_net)
2969 hso_dev =
2970 hso_create_net_device(interface, port_spec);
2971 } else {
2972 hso_dev =
2973 hso_create_bulk_serial_device(interface, port_spec);
2974 }
2975 if (!hso_dev)
2976 goto exit;
2977 break;
2978 default:
2979 goto exit;
2980 }
2981
2982 /* save our data pointer in this device */
2983 usb_set_intfdata(interface, hso_dev);
2984
2985 /* done */
2986 return 0;
2987exit:
2988 hso_free_interface(interface);
2989 return -ENODEV;
2990}
2991
2992/* device removed, cleaning up */
2993static void hso_disconnect(struct usb_interface *interface)
2994{
2995 hso_free_interface(interface);
2996
2997 /* remove reference of our private data */
2998 usb_set_intfdata(interface, NULL);
2999}
3000
3001static void async_get_intf(struct work_struct *data)
3002{
3003 struct hso_device *hso_dev =
3004 container_of(data, struct hso_device, async_get_intf);
3005 usb_autopm_get_interface(hso_dev->interface);
3006}
3007
3008static void async_put_intf(struct work_struct *data)
3009{
3010 struct hso_device *hso_dev =
3011 container_of(data, struct hso_device, async_put_intf);
3012 usb_autopm_put_interface(hso_dev->interface);
3013}
3014
3015static int hso_get_activity(struct hso_device *hso_dev)
3016{
3017 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3018 if (!hso_dev->is_active) {
3019 hso_dev->is_active = 1;
3020 schedule_work(&hso_dev->async_get_intf);
3021 }
3022 }
3023
3024 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3025 return -EAGAIN;
3026
3027 usb_mark_last_busy(hso_dev->usb);
3028
3029 return 0;
3030}
3031
3032static int hso_put_activity(struct hso_device *hso_dev)
3033{
3034 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3035 if (hso_dev->is_active) {
3036 hso_dev->is_active = 0;
3037 schedule_work(&hso_dev->async_put_intf);
3038 return -EAGAIN;
3039 }
3040 }
3041 hso_dev->is_active = 0;
3042 return 0;
3043}
3044
3045/* called by kernel when we need to suspend device */
3046static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3047{
3048 int i, result;
3049
3050 /* Stop all serial ports */
3051 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3052 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3053 result = hso_stop_serial_device(serial_table[i]);
3054 if (result)
3055 goto out;
3056 }
3057 }
3058
3059 /* Stop all network ports */
3060 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3061 if (network_table[i] &&
3062 (network_table[i]->interface == iface)) {
3063 result = hso_stop_net_device(network_table[i]);
3064 if (result)
3065 goto out;
3066 }
3067 }
3068
3069out:
3070 return 0;
3071}
3072
3073/* called by kernel when we need to resume device */
3074static int hso_resume(struct usb_interface *iface)
3075{
3076 int i, result = 0;
3077 struct hso_net *hso_net;
3078
3079 /* Start all serial ports */
3080 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3081 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3082 if (dev2ser(serial_table[i])->port.count) {
3083 result =
3084 hso_start_serial_device(serial_table[i], GFP_NOIO);
3085 hso_kick_transmit(dev2ser(serial_table[i]));
3086 if (result)
3087 goto out;
3088 }
3089 }
3090 }
3091
3092 /* Start all network ports */
3093 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3094 if (network_table[i] &&
3095 (network_table[i]->interface == iface)) {
3096 hso_net = dev2net(network_table[i]);
3097 if (hso_net->flags & IFF_UP) {
3098 /* First transmit any lingering data,
3099 then restart the device. */
3100 if (hso_net->skb_tx_buf) {
3101 dev_dbg(&iface->dev,
3102 "Transmitting"
3103 " lingering data\n");
3104 hso_net_start_xmit(hso_net->skb_tx_buf,
3105 hso_net->net);
3106 hso_net->skb_tx_buf = NULL;
3107 }
3108 result = hso_start_net_device(network_table[i]);
3109 if (result)
3110 goto out;
3111 }
3112 }
3113 }
3114
3115out:
3116 return result;
3117}
3118
3119static void reset_device(struct work_struct *data)
3120{
3121 struct hso_device *hso_dev =
3122 container_of(data, struct hso_device, reset_device);
3123 struct usb_device *usb = hso_dev->usb;
3124 int result;
3125
3126 if (hso_dev->usb_gone) {
3127 D1("No reset during disconnect\n");
3128 } else {
3129 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3130 if (result < 0)
3131 D1("unable to lock device for reset: %d\n", result);
3132 else {
3133 usb_reset_device(usb);
3134 usb_unlock_device(usb);
3135 }
3136 }
3137}
3138
3139static void hso_serial_ref_free(struct kref *ref)
3140{
3141 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3142
3143 hso_free_serial_device(hso_dev);
3144}
3145
3146static void hso_free_interface(struct usb_interface *interface)
3147{
3148 struct hso_serial *hso_dev;
3149 struct tty_struct *tty;
3150 int i;
3151
3152 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3153 if (serial_table[i] &&
3154 (serial_table[i]->interface == interface)) {
3155 hso_dev = dev2ser(serial_table[i]);
3156 tty = tty_port_tty_get(&hso_dev->port);
3157 if (tty) {
3158 tty_hangup(tty);
3159 tty_kref_put(tty);
3160 }
3161 mutex_lock(&hso_dev->parent->mutex);
3162 hso_dev->parent->usb_gone = 1;
3163 mutex_unlock(&hso_dev->parent->mutex);
3164 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3165 }
3166 }
3167
3168 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3169 if (network_table[i] &&
3170 (network_table[i]->interface == interface)) {
3171 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3172 /* hso_stop_net_device doesn't stop the net queue since
3173 * traffic needs to start it again when suspended */
3174 netif_stop_queue(dev2net(network_table[i])->net);
3175 hso_stop_net_device(network_table[i]);
3176 cancel_work_sync(&network_table[i]->async_put_intf);
3177 cancel_work_sync(&network_table[i]->async_get_intf);
3178 if (rfk) {
3179 rfkill_unregister(rfk);
3180 rfkill_destroy(rfk);
3181 }
3182 hso_free_net_device(network_table[i]);
3183 }
3184 }
3185}
3186
3187/* Helper functions */
3188
3189/* Get the endpoint ! */
3190static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3191 int type, int dir)
3192{
3193 int i;
3194 struct usb_host_interface *iface = intf->cur_altsetting;
3195 struct usb_endpoint_descriptor *endp;
3196
3197 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3198 endp = &iface->endpoint[i].desc;
3199 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3200 (usb_endpoint_type(endp) == type))
3201 return endp;
3202 }
3203
3204 return NULL;
3205}
3206
3207/* Get the byte that describes which ports are enabled */
3208static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3209{
3210 int i;
3211 struct usb_host_interface *iface = intf->cur_altsetting;
3212
3213 if (iface->extralen == 3) {
3214 *ports = iface->extra[2];
3215 return 0;
3216 }
3217
3218 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3219 if (iface->endpoint[i].extralen == 3) {
3220 *ports = iface->endpoint[i].extra[2];
3221 return 0;
3222 }
3223 }
3224
3225 return -1;
3226}
3227
3228/* interrupt urb needs to be submitted, used for serial read of muxed port */
3229static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3230 struct usb_device *usb, gfp_t gfp)
3231{
3232 int result;
3233
3234 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3235 usb_rcvintpipe(usb,
3236 shared_int->intr_endp->bEndpointAddress & 0x7F),
3237 shared_int->shared_intr_buf,
3238 1,
3239 intr_callback, shared_int,
3240 shared_int->intr_endp->bInterval);
3241
3242 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3243 if (result)
3244 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3245 result);
3246
3247 return result;
3248}
3249
3250/* operations setup of the serial interface */
3251static const struct tty_operations hso_serial_ops = {
3252 .open = hso_serial_open,
3253 .close = hso_serial_close,
3254 .write = hso_serial_write,
3255 .write_room = hso_serial_write_room,
3256 .ioctl = hso_serial_ioctl,
3257 .set_termios = hso_serial_set_termios,
3258 .chars_in_buffer = hso_serial_chars_in_buffer,
3259 .tiocmget = hso_serial_tiocmget,
3260 .tiocmset = hso_serial_tiocmset,
3261 .get_icount = hso_get_count,
3262 .unthrottle = hso_unthrottle
3263};
3264
3265static struct usb_driver hso_driver = {
3266 .name = driver_name,
3267 .probe = hso_probe,
3268 .disconnect = hso_disconnect,
3269 .id_table = hso_ids,
3270 .suspend = hso_suspend,
3271 .resume = hso_resume,
3272 .reset_resume = hso_resume,
3273 .supports_autosuspend = 1,
3274 .disable_hub_initiated_lpm = 1,
3275};
3276
3277static int __init hso_init(void)
3278{
3279 int i;
3280 int result;
3281
3282 /* put it in the log */
3283 printk(KERN_INFO "hso: %s\n", version);
3284
3285 /* Initialise the serial table semaphore and table */
3286 spin_lock_init(&serial_table_lock);
3287 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3288 serial_table[i] = NULL;
3289
3290 /* allocate our driver using the proper amount of supported minors */
3291 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3292 if (!tty_drv)
3293 return -ENOMEM;
3294
3295 /* fill in all needed values */
3296 tty_drv->driver_name = driver_name;
3297 tty_drv->name = tty_filename;
3298
3299 /* if major number is provided as parameter, use that one */
3300 if (tty_major)
3301 tty_drv->major = tty_major;
3302
3303 tty_drv->minor_start = 0;
3304 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3305 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3306 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3307 tty_drv->init_termios = tty_std_termios;
3308 hso_init_termios(&tty_drv->init_termios);
3309 tty_set_operations(tty_drv, &hso_serial_ops);
3310
3311 /* register the tty driver */
3312 result = tty_register_driver(tty_drv);
3313 if (result) {
3314 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3315 __func__, result);
3316 goto err_free_tty;
3317 }
3318
3319 /* register this module as an usb driver */
3320 result = usb_register(&hso_driver);
3321 if (result) {
3322 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3323 result);
3324 goto err_unreg_tty;
3325 }
3326
3327 /* done */
3328 return 0;
3329err_unreg_tty:
3330 tty_unregister_driver(tty_drv);
3331err_free_tty:
3332 put_tty_driver(tty_drv);
3333 return result;
3334}
3335
3336static void __exit hso_exit(void)
3337{
3338 printk(KERN_INFO "hso: unloaded\n");
3339
3340 tty_unregister_driver(tty_drv);
3341 put_tty_driver(tty_drv);
3342 /* deregister the usb driver */
3343 usb_deregister(&hso_driver);
3344}
3345
3346/* Module definitions */
3347module_init(hso_init);
3348module_exit(hso_exit);
3349
3350MODULE_AUTHOR(MOD_AUTHOR);
3351MODULE_DESCRIPTION(MOD_DESCRIPTION);
3352MODULE_LICENSE(MOD_LICENSE);
3353
3354/* change the debug level (eg: insmod hso.ko debug=0x04) */
3355MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3356module_param(debug, int, S_IRUGO | S_IWUSR);
3357
3358/* set the major tty number (eg: insmod hso.ko tty_major=245) */
3359MODULE_PARM_DESC(tty_major, "Set the major tty number");
3360module_param(tty_major, int, S_IRUGO | S_IWUSR);
3361
3362/* disable network interface (eg: insmod hso.ko disable_net=1) */
3363MODULE_PARM_DESC(disable_net, "Disable the network interface");
3364module_param(disable_net, int, S_IRUGO | S_IWUSR);