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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// SPDX-License-Identifier: GPL-2.0-only
2/******************************************************************************
3 *
4 * Driver for Option High Speed Mobile Devices.
5 *
6 * Copyright (C) 2008 Option International
7 * Filip Aben <f.aben@option.com>
8 * Denis Joseph Barrow <d.barow@option.com>
9 * Jan Dumon <j.dumon@option.com>
10 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
11 * <ajb@spheresystems.co.uk>
12 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
13 * Copyright (C) 2008 Novell, Inc.
14 *
15 *****************************************************************************/
16
17/******************************************************************************
18 *
19 * Description of the device:
20 *
21 * Interface 0: Contains the IP network interface on the bulk end points.
22 * The multiplexed serial ports are using the interrupt and
23 * control endpoints.
24 * Interrupt contains a bitmap telling which multiplexed
25 * serialport needs servicing.
26 *
27 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
28 * port is opened, as this have a huge impact on the network port
29 * throughput.
30 *
31 * Interface 2: Standard modem interface - circuit switched interface, this
32 * can be used to make a standard ppp connection however it
33 * should not be used in conjunction with the IP network interface
34 * enabled for USB performance reasons i.e. if using this set
35 * ideally disable_net=1.
36 *
37 *****************************************************************************/
38
39#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
40
41#include <linux/sched/signal.h>
42#include <linux/slab.h>
43#include <linux/init.h>
44#include <linux/delay.h>
45#include <linux/netdevice.h>
46#include <linux/module.h>
47#include <linux/ethtool.h>
48#include <linux/usb.h>
49#include <linux/tty.h>
50#include <linux/tty_driver.h>
51#include <linux/tty_flip.h>
52#include <linux/kmod.h>
53#include <linux/rfkill.h>
54#include <linux/ip.h>
55#include <linux/uaccess.h>
56#include <linux/usb/cdc.h>
57#include <net/arp.h>
58#include <asm/byteorder.h>
59#include <linux/serial_core.h>
60#include <linux/serial.h>
61
62
63#define MOD_AUTHOR "Option Wireless"
64#define MOD_DESCRIPTION "USB High Speed Option driver"
65
66#define HSO_MAX_NET_DEVICES 10
67#define HSO__MAX_MTU 2048
68#define DEFAULT_MTU 1500
69#define DEFAULT_MRU 1500
70
71#define CTRL_URB_RX_SIZE 1024
72#define CTRL_URB_TX_SIZE 64
73
74#define BULK_URB_RX_SIZE 4096
75#define BULK_URB_TX_SIZE 8192
76
77#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
78#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
79#define MUX_BULK_RX_BUF_COUNT 4
80#define USB_TYPE_OPTION_VENDOR 0x20
81
82/* These definitions are used with the struct hso_net flags element */
83/* - use *_bit operations on it. (bit indices not values.) */
84#define HSO_NET_RUNNING 0
85
86#define HSO_NET_TX_TIMEOUT (HZ*10)
87
88#define HSO_SERIAL_MAGIC 0x48534f31
89
90/* Number of ttys to handle */
91#define HSO_SERIAL_TTY_MINORS 256
92
93#define MAX_RX_URBS 2
94
95/*****************************************************************************/
96/* Debugging functions */
97/*****************************************************************************/
98#define hso_dbg(lvl, fmt, ...) \
99do { \
100 if ((lvl) & debug) \
101 pr_info("[%d:%s] " fmt, \
102 __LINE__, __func__, ##__VA_ARGS__); \
103} while (0)
104
105/*****************************************************************************/
106/* Enumerators */
107/*****************************************************************************/
108enum pkt_parse_state {
109 WAIT_IP,
110 WAIT_DATA,
111 WAIT_SYNC
112};
113
114/*****************************************************************************/
115/* Structs */
116/*****************************************************************************/
117
118struct hso_shared_int {
119 struct usb_endpoint_descriptor *intr_endp;
120 void *shared_intr_buf;
121 struct urb *shared_intr_urb;
122 struct usb_device *usb;
123 int use_count;
124 int ref_count;
125 struct mutex shared_int_lock;
126};
127
128struct hso_net {
129 struct hso_device *parent;
130 struct net_device *net;
131 struct rfkill *rfkill;
132 char name[24];
133
134 struct usb_endpoint_descriptor *in_endp;
135 struct usb_endpoint_descriptor *out_endp;
136
137 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
138 struct urb *mux_bulk_tx_urb;
139 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
140 void *mux_bulk_tx_buf;
141
142 struct sk_buff *skb_rx_buf;
143 struct sk_buff *skb_tx_buf;
144
145 enum pkt_parse_state rx_parse_state;
146 spinlock_t net_lock;
147
148 unsigned short rx_buf_size;
149 unsigned short rx_buf_missing;
150 struct iphdr rx_ip_hdr;
151
152 unsigned long flags;
153};
154
155enum rx_ctrl_state{
156 RX_IDLE,
157 RX_SENT,
158 RX_PENDING
159};
160
161#define BM_REQUEST_TYPE (0xa1)
162#define B_NOTIFICATION (0x20)
163#define W_VALUE (0x0)
164#define W_LENGTH (0x2)
165
166#define B_OVERRUN (0x1<<6)
167#define B_PARITY (0x1<<5)
168#define B_FRAMING (0x1<<4)
169#define B_RING_SIGNAL (0x1<<3)
170#define B_BREAK (0x1<<2)
171#define B_TX_CARRIER (0x1<<1)
172#define B_RX_CARRIER (0x1<<0)
173
174struct hso_serial_state_notification {
175 u8 bmRequestType;
176 u8 bNotification;
177 u16 wValue;
178 u16 wIndex;
179 u16 wLength;
180 u16 UART_state_bitmap;
181} __packed;
182
183struct hso_tiocmget {
184 struct mutex mutex;
185 wait_queue_head_t waitq;
186 int intr_completed;
187 struct usb_endpoint_descriptor *endp;
188 struct urb *urb;
189 struct hso_serial_state_notification *serial_state_notification;
190 u16 prev_UART_state_bitmap;
191 struct uart_icount icount;
192};
193
194
195struct hso_serial {
196 struct hso_device *parent;
197 int magic;
198 u8 minor;
199
200 struct hso_shared_int *shared_int;
201
202 /* rx/tx urb could be either a bulk urb or a control urb depending
203 on which serial port it is used on. */
204 struct urb *rx_urb[MAX_RX_URBS];
205 u8 num_rx_urbs;
206 u8 *rx_data[MAX_RX_URBS];
207 u16 rx_data_length; /* should contain allocated length */
208
209 struct urb *tx_urb;
210 u8 *tx_data;
211 u8 *tx_buffer;
212 u16 tx_data_length; /* should contain allocated length */
213 u16 tx_data_count;
214 u16 tx_buffer_count;
215 struct usb_ctrlrequest ctrl_req_tx;
216 struct usb_ctrlrequest ctrl_req_rx;
217
218 struct usb_endpoint_descriptor *in_endp;
219 struct usb_endpoint_descriptor *out_endp;
220
221 enum rx_ctrl_state rx_state;
222 u8 rts_state;
223 u8 dtr_state;
224 unsigned tx_urb_used:1;
225
226 struct tty_port port;
227 /* from usb_serial_port */
228 spinlock_t serial_lock;
229
230 int (*write_data) (struct hso_serial *serial);
231 struct hso_tiocmget *tiocmget;
232 /* Hacks required to get flow control
233 * working on the serial receive buffers
234 * so as not to drop characters on the floor.
235 */
236 int curr_rx_urb_idx;
237 u8 rx_urb_filled[MAX_RX_URBS];
238 struct tasklet_struct unthrottle_tasklet;
239};
240
241struct hso_device {
242 union {
243 struct hso_serial *dev_serial;
244 struct hso_net *dev_net;
245 } port_data;
246
247 u32 port_spec;
248
249 u8 is_active;
250 u8 usb_gone;
251 struct work_struct async_get_intf;
252 struct work_struct async_put_intf;
253
254 struct usb_device *usb;
255 struct usb_interface *interface;
256
257 struct device *dev;
258 struct kref ref;
259 struct mutex mutex;
260};
261
262/* Type of interface */
263#define HSO_INTF_MASK 0xFF00
264#define HSO_INTF_MUX 0x0100
265#define HSO_INTF_BULK 0x0200
266
267/* Type of port */
268#define HSO_PORT_MASK 0xFF
269#define HSO_PORT_NO_PORT 0x0
270#define HSO_PORT_CONTROL 0x1
271#define HSO_PORT_APP 0x2
272#define HSO_PORT_GPS 0x3
273#define HSO_PORT_PCSC 0x4
274#define HSO_PORT_APP2 0x5
275#define HSO_PORT_GPS_CONTROL 0x6
276#define HSO_PORT_MSD 0x7
277#define HSO_PORT_VOICE 0x8
278#define HSO_PORT_DIAG2 0x9
279#define HSO_PORT_DIAG 0x10
280#define HSO_PORT_MODEM 0x11
281#define HSO_PORT_NETWORK 0x12
282
283/* Additional device info */
284#define HSO_INFO_MASK 0xFF000000
285#define HSO_INFO_CRC_BUG 0x01000000
286
287/*****************************************************************************/
288/* Prototypes */
289/*****************************************************************************/
290/* Serial driver functions */
291static int hso_serial_tiocmset(struct tty_struct *tty,
292 unsigned int set, unsigned int clear);
293static void ctrl_callback(struct urb *urb);
294static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
295static void hso_kick_transmit(struct hso_serial *serial);
296/* Helper functions */
297static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
298 struct usb_device *usb, gfp_t gfp);
299static void handle_usb_error(int status, const char *function,
300 struct hso_device *hso_dev);
301static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
302 int type, int dir);
303static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
304static void hso_free_interface(struct usb_interface *intf);
305static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
306static int hso_stop_serial_device(struct hso_device *hso_dev);
307static int hso_start_net_device(struct hso_device *hso_dev);
308static void hso_free_shared_int(struct hso_shared_int *shared_int);
309static int hso_stop_net_device(struct hso_device *hso_dev);
310static void hso_serial_ref_free(struct kref *ref);
311static void hso_std_serial_read_bulk_callback(struct urb *urb);
312static int hso_mux_serial_read(struct hso_serial *serial);
313static void async_get_intf(struct work_struct *data);
314static void async_put_intf(struct work_struct *data);
315static int hso_put_activity(struct hso_device *hso_dev);
316static int hso_get_activity(struct hso_device *hso_dev);
317static void tiocmget_intr_callback(struct urb *urb);
318/*****************************************************************************/
319/* Helping functions */
320/*****************************************************************************/
321
322/* #define DEBUG */
323
324static inline struct hso_net *dev2net(struct hso_device *hso_dev)
325{
326 return hso_dev->port_data.dev_net;
327}
328
329static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
330{
331 return hso_dev->port_data.dev_serial;
332}
333
334/* Debugging functions */
335#ifdef DEBUG
336static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
337 unsigned int len)
338{
339 static char name[255];
340
341 sprintf(name, "hso[%d:%s]", line_count, func_name);
342 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
343}
344
345#define DUMP(buf_, len_) \
346 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
347
348#define DUMP1(buf_, len_) \
349 do { \
350 if (0x01 & debug) \
351 DUMP(buf_, len_); \
352 } while (0)
353#else
354#define DUMP(buf_, len_)
355#define DUMP1(buf_, len_)
356#endif
357
358/* module parameters */
359static int debug;
360static int tty_major;
361static int disable_net;
362
363/* driver info */
364static const char driver_name[] = "hso";
365static const char tty_filename[] = "ttyHS";
366static const char *version = __FILE__ ": " MOD_AUTHOR;
367/* the usb driver itself (registered in hso_init) */
368static struct usb_driver hso_driver;
369/* serial structures */
370static struct tty_driver *tty_drv;
371static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
372static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
373static DEFINE_SPINLOCK(serial_table_lock);
374
375static const s32 default_port_spec[] = {
376 HSO_INTF_MUX | HSO_PORT_NETWORK,
377 HSO_INTF_BULK | HSO_PORT_DIAG,
378 HSO_INTF_BULK | HSO_PORT_MODEM,
379 0
380};
381
382static const s32 icon321_port_spec[] = {
383 HSO_INTF_MUX | HSO_PORT_NETWORK,
384 HSO_INTF_BULK | HSO_PORT_DIAG2,
385 HSO_INTF_BULK | HSO_PORT_MODEM,
386 HSO_INTF_BULK | HSO_PORT_DIAG,
387 0
388};
389
390#define default_port_device(vendor, product) \
391 USB_DEVICE(vendor, product), \
392 .driver_info = (kernel_ulong_t)default_port_spec
393
394#define icon321_port_device(vendor, product) \
395 USB_DEVICE(vendor, product), \
396 .driver_info = (kernel_ulong_t)icon321_port_spec
397
398/* list of devices we support */
399static const struct usb_device_id hso_ids[] = {
400 {default_port_device(0x0af0, 0x6711)},
401 {default_port_device(0x0af0, 0x6731)},
402 {default_port_device(0x0af0, 0x6751)},
403 {default_port_device(0x0af0, 0x6771)},
404 {default_port_device(0x0af0, 0x6791)},
405 {default_port_device(0x0af0, 0x6811)},
406 {default_port_device(0x0af0, 0x6911)},
407 {default_port_device(0x0af0, 0x6951)},
408 {default_port_device(0x0af0, 0x6971)},
409 {default_port_device(0x0af0, 0x7011)},
410 {default_port_device(0x0af0, 0x7031)},
411 {default_port_device(0x0af0, 0x7051)},
412 {default_port_device(0x0af0, 0x7071)},
413 {default_port_device(0x0af0, 0x7111)},
414 {default_port_device(0x0af0, 0x7211)},
415 {default_port_device(0x0af0, 0x7251)},
416 {default_port_device(0x0af0, 0x7271)},
417 {default_port_device(0x0af0, 0x7311)},
418 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
419 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
420 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
421 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
422 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
423 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
424 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
425 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
426 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
427 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
428 {USB_DEVICE(0x0af0, 0x7701)},
429 {USB_DEVICE(0x0af0, 0x7706)},
430 {USB_DEVICE(0x0af0, 0x7801)},
431 {USB_DEVICE(0x0af0, 0x7901)},
432 {USB_DEVICE(0x0af0, 0x7A01)},
433 {USB_DEVICE(0x0af0, 0x7A05)},
434 {USB_DEVICE(0x0af0, 0x8200)},
435 {USB_DEVICE(0x0af0, 0x8201)},
436 {USB_DEVICE(0x0af0, 0x8300)},
437 {USB_DEVICE(0x0af0, 0x8302)},
438 {USB_DEVICE(0x0af0, 0x8304)},
439 {USB_DEVICE(0x0af0, 0x8400)},
440 {USB_DEVICE(0x0af0, 0x8600)},
441 {USB_DEVICE(0x0af0, 0x8800)},
442 {USB_DEVICE(0x0af0, 0x8900)},
443 {USB_DEVICE(0x0af0, 0x9000)},
444 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */
445 {USB_DEVICE(0x0af0, 0xd035)},
446 {USB_DEVICE(0x0af0, 0xd055)},
447 {USB_DEVICE(0x0af0, 0xd155)},
448 {USB_DEVICE(0x0af0, 0xd255)},
449 {USB_DEVICE(0x0af0, 0xd057)},
450 {USB_DEVICE(0x0af0, 0xd157)},
451 {USB_DEVICE(0x0af0, 0xd257)},
452 {USB_DEVICE(0x0af0, 0xd357)},
453 {USB_DEVICE(0x0af0, 0xd058)},
454 {USB_DEVICE(0x0af0, 0xc100)},
455 {}
456};
457MODULE_DEVICE_TABLE(usb, hso_ids);
458
459/* Sysfs attribute */
460static ssize_t hsotype_show(struct device *dev,
461 struct device_attribute *attr, char *buf)
462{
463 struct hso_device *hso_dev = dev_get_drvdata(dev);
464 char *port_name;
465
466 if (!hso_dev)
467 return 0;
468
469 switch (hso_dev->port_spec & HSO_PORT_MASK) {
470 case HSO_PORT_CONTROL:
471 port_name = "Control";
472 break;
473 case HSO_PORT_APP:
474 port_name = "Application";
475 break;
476 case HSO_PORT_APP2:
477 port_name = "Application2";
478 break;
479 case HSO_PORT_GPS:
480 port_name = "GPS";
481 break;
482 case HSO_PORT_GPS_CONTROL:
483 port_name = "GPS Control";
484 break;
485 case HSO_PORT_PCSC:
486 port_name = "PCSC";
487 break;
488 case HSO_PORT_DIAG:
489 port_name = "Diagnostic";
490 break;
491 case HSO_PORT_DIAG2:
492 port_name = "Diagnostic2";
493 break;
494 case HSO_PORT_MODEM:
495 port_name = "Modem";
496 break;
497 case HSO_PORT_NETWORK:
498 port_name = "Network";
499 break;
500 default:
501 port_name = "Unknown";
502 break;
503 }
504
505 return sprintf(buf, "%s\n", port_name);
506}
507static DEVICE_ATTR_RO(hsotype);
508
509static struct attribute *hso_serial_dev_attrs[] = {
510 &dev_attr_hsotype.attr,
511 NULL
512};
513
514ATTRIBUTE_GROUPS(hso_serial_dev);
515
516static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
517{
518 int idx;
519
520 for (idx = 0; idx < serial->num_rx_urbs; idx++)
521 if (serial->rx_urb[idx] == urb)
522 return idx;
523 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
524 return -1;
525}
526
527/* converts mux value to a port spec value */
528static u32 hso_mux_to_port(int mux)
529{
530 u32 result;
531
532 switch (mux) {
533 case 0x1:
534 result = HSO_PORT_CONTROL;
535 break;
536 case 0x2:
537 result = HSO_PORT_APP;
538 break;
539 case 0x4:
540 result = HSO_PORT_PCSC;
541 break;
542 case 0x8:
543 result = HSO_PORT_GPS;
544 break;
545 case 0x10:
546 result = HSO_PORT_APP2;
547 break;
548 default:
549 result = HSO_PORT_NO_PORT;
550 }
551 return result;
552}
553
554/* converts port spec value to a mux value */
555static u32 hso_port_to_mux(int port)
556{
557 u32 result;
558
559 switch (port & HSO_PORT_MASK) {
560 case HSO_PORT_CONTROL:
561 result = 0x0;
562 break;
563 case HSO_PORT_APP:
564 result = 0x1;
565 break;
566 case HSO_PORT_PCSC:
567 result = 0x2;
568 break;
569 case HSO_PORT_GPS:
570 result = 0x3;
571 break;
572 case HSO_PORT_APP2:
573 result = 0x4;
574 break;
575 default:
576 result = 0x0;
577 }
578 return result;
579}
580
581static struct hso_serial *get_serial_by_shared_int_and_type(
582 struct hso_shared_int *shared_int,
583 int mux)
584{
585 int i, port;
586
587 port = hso_mux_to_port(mux);
588
589 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
590 if (serial_table[i] &&
591 (dev2ser(serial_table[i])->shared_int == shared_int) &&
592 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
593 return dev2ser(serial_table[i]);
594 }
595 }
596
597 return NULL;
598}
599
600static struct hso_serial *get_serial_by_index(unsigned index)
601{
602 struct hso_serial *serial = NULL;
603 unsigned long flags;
604
605 spin_lock_irqsave(&serial_table_lock, flags);
606 if (serial_table[index])
607 serial = dev2ser(serial_table[index]);
608 spin_unlock_irqrestore(&serial_table_lock, flags);
609
610 return serial;
611}
612
613static int obtain_minor(struct hso_serial *serial)
614{
615 int index;
616 unsigned long flags;
617
618 spin_lock_irqsave(&serial_table_lock, flags);
619 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
620 if (serial_table[index] == NULL) {
621 serial_table[index] = serial->parent;
622 serial->minor = index;
623 spin_unlock_irqrestore(&serial_table_lock, flags);
624 return 0;
625 }
626 }
627 spin_unlock_irqrestore(&serial_table_lock, flags);
628
629 pr_err("%s: no free serial devices in table\n", __func__);
630 return -1;
631}
632
633static void release_minor(struct hso_serial *serial)
634{
635 unsigned long flags;
636
637 spin_lock_irqsave(&serial_table_lock, flags);
638 serial_table[serial->minor] = NULL;
639 spin_unlock_irqrestore(&serial_table_lock, flags);
640}
641
642static void handle_usb_error(int status, const char *function,
643 struct hso_device *hso_dev)
644{
645 char *explanation;
646
647 switch (status) {
648 case -ENODEV:
649 explanation = "no device";
650 break;
651 case -ENOENT:
652 explanation = "endpoint not enabled";
653 break;
654 case -EPIPE:
655 explanation = "endpoint stalled";
656 break;
657 case -ENOSPC:
658 explanation = "not enough bandwidth";
659 break;
660 case -ESHUTDOWN:
661 explanation = "device disabled";
662 break;
663 case -EHOSTUNREACH:
664 explanation = "device suspended";
665 break;
666 case -EINVAL:
667 case -EAGAIN:
668 case -EFBIG:
669 case -EMSGSIZE:
670 explanation = "internal error";
671 break;
672 case -EILSEQ:
673 case -EPROTO:
674 case -ETIME:
675 case -ETIMEDOUT:
676 explanation = "protocol error";
677 if (hso_dev)
678 usb_queue_reset_device(hso_dev->interface);
679 break;
680 default:
681 explanation = "unknown status";
682 break;
683 }
684
685 /* log a meaningful explanation of an USB status */
686 hso_dbg(0x1, "%s: received USB status - %s (%d)\n",
687 function, explanation, status);
688}
689
690/* Network interface functions */
691
692/* called when net interface is brought up by ifconfig */
693static int hso_net_open(struct net_device *net)
694{
695 struct hso_net *odev = netdev_priv(net);
696 unsigned long flags = 0;
697
698 if (!odev) {
699 dev_err(&net->dev, "No net device !\n");
700 return -ENODEV;
701 }
702
703 odev->skb_tx_buf = NULL;
704
705 /* setup environment */
706 spin_lock_irqsave(&odev->net_lock, flags);
707 odev->rx_parse_state = WAIT_IP;
708 odev->rx_buf_size = 0;
709 odev->rx_buf_missing = sizeof(struct iphdr);
710 spin_unlock_irqrestore(&odev->net_lock, flags);
711
712 /* We are up and running. */
713 set_bit(HSO_NET_RUNNING, &odev->flags);
714 hso_start_net_device(odev->parent);
715
716 /* Tell the kernel we are ready to start receiving from it */
717 netif_start_queue(net);
718
719 return 0;
720}
721
722/* called when interface is brought down by ifconfig */
723static int hso_net_close(struct net_device *net)
724{
725 struct hso_net *odev = netdev_priv(net);
726
727 /* we don't need the queue anymore */
728 netif_stop_queue(net);
729 /* no longer running */
730 clear_bit(HSO_NET_RUNNING, &odev->flags);
731
732 hso_stop_net_device(odev->parent);
733
734 /* done */
735 return 0;
736}
737
738/* USB tells is xmit done, we should start the netqueue again */
739static void write_bulk_callback(struct urb *urb)
740{
741 struct hso_net *odev = urb->context;
742 int status = urb->status;
743
744 /* Sanity check */
745 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
746 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
747 return;
748 }
749
750 /* Do we still have a valid kernel network device? */
751 if (!netif_device_present(odev->net)) {
752 dev_err(&urb->dev->dev, "%s: net device not present\n",
753 __func__);
754 return;
755 }
756
757 /* log status, but don't act on it, we don't need to resubmit anything
758 * anyhow */
759 if (status)
760 handle_usb_error(status, __func__, odev->parent);
761
762 hso_put_activity(odev->parent);
763
764 /* Tell the network interface we are ready for another frame */
765 netif_wake_queue(odev->net);
766}
767
768/* called by kernel when we need to transmit a packet */
769static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
770 struct net_device *net)
771{
772 struct hso_net *odev = netdev_priv(net);
773 int result;
774
775 /* Tell the kernel, "No more frames 'til we are done with this one." */
776 netif_stop_queue(net);
777 if (hso_get_activity(odev->parent) == -EAGAIN) {
778 odev->skb_tx_buf = skb;
779 return NETDEV_TX_OK;
780 }
781
782 /* log if asked */
783 DUMP1(skb->data, skb->len);
784 /* Copy it from kernel memory to OUR memory */
785 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
786 hso_dbg(0x1, "len: %d/%d\n", skb->len, MUX_BULK_TX_BUF_SIZE);
787
788 /* Fill in the URB for shipping it out. */
789 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
790 odev->parent->usb,
791 usb_sndbulkpipe(odev->parent->usb,
792 odev->out_endp->
793 bEndpointAddress & 0x7F),
794 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
795 odev);
796
797 /* Deal with the Zero Length packet problem, I hope */
798 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
799
800 /* Send the URB on its merry way. */
801 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
802 if (result) {
803 dev_warn(&odev->parent->interface->dev,
804 "failed mux_bulk_tx_urb %d\n", result);
805 net->stats.tx_errors++;
806 netif_start_queue(net);
807 } else {
808 net->stats.tx_packets++;
809 net->stats.tx_bytes += skb->len;
810 }
811 dev_kfree_skb(skb);
812 /* we're done */
813 return NETDEV_TX_OK;
814}
815
816static const struct ethtool_ops ops = {
817 .get_link = ethtool_op_get_link
818};
819
820/* called when a packet did not ack after watchdogtimeout */
821static void hso_net_tx_timeout(struct net_device *net, unsigned int txqueue)
822{
823 struct hso_net *odev = netdev_priv(net);
824
825 if (!odev)
826 return;
827
828 /* Tell syslog we are hosed. */
829 dev_warn(&net->dev, "Tx timed out.\n");
830
831 /* Tear the waiting frame off the list */
832 if (odev->mux_bulk_tx_urb)
833 usb_unlink_urb(odev->mux_bulk_tx_urb);
834
835 /* Update statistics */
836 net->stats.tx_errors++;
837}
838
839/* make a real packet from the received USB buffer */
840static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
841 unsigned int count, unsigned char is_eop)
842{
843 unsigned short temp_bytes;
844 unsigned short buffer_offset = 0;
845 unsigned short frame_len;
846
847 /* log if needed */
848 hso_dbg(0x1, "Rx %d bytes\n", count);
849 DUMP(ip_pkt, min(128, (int)count));
850
851 while (count) {
852 switch (odev->rx_parse_state) {
853 case WAIT_IP:
854 /* waiting for IP header. */
855 /* wanted bytes - size of ip header */
856 temp_bytes =
857 (count <
858 odev->rx_buf_missing) ? count : odev->
859 rx_buf_missing;
860
861 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
862 odev->rx_buf_size, ip_pkt + buffer_offset,
863 temp_bytes);
864
865 odev->rx_buf_size += temp_bytes;
866 buffer_offset += temp_bytes;
867 odev->rx_buf_missing -= temp_bytes;
868 count -= temp_bytes;
869
870 if (!odev->rx_buf_missing) {
871 /* header is complete allocate an sk_buffer and
872 * continue to WAIT_DATA */
873 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
874
875 if ((frame_len > DEFAULT_MRU) ||
876 (frame_len < sizeof(struct iphdr))) {
877 dev_err(&odev->net->dev,
878 "Invalid frame (%d) length\n",
879 frame_len);
880 odev->rx_parse_state = WAIT_SYNC;
881 continue;
882 }
883 /* Allocate an sk_buff */
884 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
885 frame_len);
886 if (!odev->skb_rx_buf) {
887 /* We got no receive buffer. */
888 hso_dbg(0x1, "could not allocate memory\n");
889 odev->rx_parse_state = WAIT_SYNC;
890 continue;
891 }
892
893 /* Copy what we got so far. make room for iphdr
894 * after tail. */
895 skb_put_data(odev->skb_rx_buf,
896 (char *)&(odev->rx_ip_hdr),
897 sizeof(struct iphdr));
898
899 /* ETH_HLEN */
900 odev->rx_buf_size = sizeof(struct iphdr);
901
902 /* Filip actually use .tot_len */
903 odev->rx_buf_missing =
904 frame_len - sizeof(struct iphdr);
905 odev->rx_parse_state = WAIT_DATA;
906 }
907 break;
908
909 case WAIT_DATA:
910 temp_bytes = (count < odev->rx_buf_missing)
911 ? count : odev->rx_buf_missing;
912
913 /* Copy the rest of the bytes that are left in the
914 * buffer into the waiting sk_buf. */
915 /* Make room for temp_bytes after tail. */
916 skb_put_data(odev->skb_rx_buf,
917 ip_pkt + buffer_offset,
918 temp_bytes);
919
920 odev->rx_buf_missing -= temp_bytes;
921 count -= temp_bytes;
922 buffer_offset += temp_bytes;
923 odev->rx_buf_size += temp_bytes;
924 if (!odev->rx_buf_missing) {
925 /* Packet is complete. Inject into stack. */
926 /* We have IP packet here */
927 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
928 skb_reset_mac_header(odev->skb_rx_buf);
929
930 /* Ship it off to the kernel */
931 netif_rx(odev->skb_rx_buf);
932 /* No longer our buffer. */
933 odev->skb_rx_buf = NULL;
934
935 /* update out statistics */
936 odev->net->stats.rx_packets++;
937
938 odev->net->stats.rx_bytes += odev->rx_buf_size;
939
940 odev->rx_buf_size = 0;
941 odev->rx_buf_missing = sizeof(struct iphdr);
942 odev->rx_parse_state = WAIT_IP;
943 }
944 break;
945
946 case WAIT_SYNC:
947 hso_dbg(0x1, " W_S\n");
948 count = 0;
949 break;
950 default:
951 hso_dbg(0x1, "\n");
952 count--;
953 break;
954 }
955 }
956
957 /* Recovery mechanism for WAIT_SYNC state. */
958 if (is_eop) {
959 if (odev->rx_parse_state == WAIT_SYNC) {
960 odev->rx_parse_state = WAIT_IP;
961 odev->rx_buf_size = 0;
962 odev->rx_buf_missing = sizeof(struct iphdr);
963 }
964 }
965}
966
967static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
968{
969 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
970 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
971
972 if (((rest == 5) || (rest == 6)) &&
973 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
974 crc_check, 4)) {
975 urb->actual_length -= 4;
976 }
977}
978
979/* Moving data from usb to kernel (in interrupt state) */
980static void read_bulk_callback(struct urb *urb)
981{
982 struct hso_net *odev = urb->context;
983 struct net_device *net;
984 int result;
985 unsigned long flags;
986 int status = urb->status;
987
988 /* is al ok? (Filip: Who's Al ?) */
989 if (status) {
990 handle_usb_error(status, __func__, odev->parent);
991 return;
992 }
993
994 /* Sanity check */
995 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
996 hso_dbg(0x1, "BULK IN callback but driver is not active!\n");
997 return;
998 }
999 usb_mark_last_busy(urb->dev);
1000
1001 net = odev->net;
1002
1003 if (!netif_device_present(net)) {
1004 /* Somebody killed our network interface... */
1005 return;
1006 }
1007
1008 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1009 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1010
1011 /* do we even have a packet? */
1012 if (urb->actual_length) {
1013 /* Handle the IP stream, add header and push it onto network
1014 * stack if the packet is complete. */
1015 spin_lock_irqsave(&odev->net_lock, flags);
1016 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1017 (urb->transfer_buffer_length >
1018 urb->actual_length) ? 1 : 0);
1019 spin_unlock_irqrestore(&odev->net_lock, flags);
1020 }
1021
1022 /* We are done with this URB, resubmit it. Prep the USB to wait for
1023 * another frame. Reuse same as received. */
1024 usb_fill_bulk_urb(urb,
1025 odev->parent->usb,
1026 usb_rcvbulkpipe(odev->parent->usb,
1027 odev->in_endp->
1028 bEndpointAddress & 0x7F),
1029 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1030 read_bulk_callback, odev);
1031
1032 /* Give this to the USB subsystem so it can tell us when more data
1033 * arrives. */
1034 result = usb_submit_urb(urb, GFP_ATOMIC);
1035 if (result)
1036 dev_warn(&odev->parent->interface->dev,
1037 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1038 result);
1039}
1040
1041/* Serial driver functions */
1042
1043static void hso_init_termios(struct ktermios *termios)
1044{
1045 /*
1046 * The default requirements for this device are:
1047 */
1048 termios->c_iflag &=
1049 ~(IGNBRK /* disable ignore break */
1050 | BRKINT /* disable break causes interrupt */
1051 | PARMRK /* disable mark parity errors */
1052 | ISTRIP /* disable clear high bit of input characters */
1053 | INLCR /* disable translate NL to CR */
1054 | IGNCR /* disable ignore CR */
1055 | ICRNL /* disable translate CR to NL */
1056 | IXON); /* disable enable XON/XOFF flow control */
1057
1058 /* disable postprocess output characters */
1059 termios->c_oflag &= ~OPOST;
1060
1061 termios->c_lflag &=
1062 ~(ECHO /* disable echo input characters */
1063 | ECHONL /* disable echo new line */
1064 | ICANON /* disable erase, kill, werase, and rprnt
1065 special characters */
1066 | ISIG /* disable interrupt, quit, and suspend special
1067 characters */
1068 | IEXTEN); /* disable non-POSIX special characters */
1069
1070 termios->c_cflag &=
1071 ~(CSIZE /* no size */
1072 | PARENB /* disable parity bit */
1073 | CBAUD /* clear current baud rate */
1074 | CBAUDEX); /* clear current buad rate */
1075
1076 termios->c_cflag |= CS8; /* character size 8 bits */
1077
1078 /* baud rate 115200 */
1079 tty_termios_encode_baud_rate(termios, 115200, 115200);
1080}
1081
1082static void _hso_serial_set_termios(struct tty_struct *tty)
1083{
1084 struct hso_serial *serial = tty->driver_data;
1085
1086 if (!serial) {
1087 pr_err("%s: no tty structures", __func__);
1088 return;
1089 }
1090
1091 hso_dbg(0x8, "port %d\n", serial->minor);
1092
1093 /*
1094 * Fix up unsupported bits
1095 */
1096 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1097
1098 tty->termios.c_cflag &=
1099 ~(CSIZE /* no size */
1100 | PARENB /* disable parity bit */
1101 | CBAUD /* clear current baud rate */
1102 | CBAUDEX); /* clear current buad rate */
1103
1104 tty->termios.c_cflag |= CS8; /* character size 8 bits */
1105
1106 /* baud rate 115200 */
1107 tty_encode_baud_rate(tty, 115200, 115200);
1108}
1109
1110static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1111{
1112 int result;
1113 /* We are done with this URB, resubmit it. Prep the USB to wait for
1114 * another frame */
1115 usb_fill_bulk_urb(urb, serial->parent->usb,
1116 usb_rcvbulkpipe(serial->parent->usb,
1117 serial->in_endp->
1118 bEndpointAddress & 0x7F),
1119 urb->transfer_buffer, serial->rx_data_length,
1120 hso_std_serial_read_bulk_callback, serial);
1121 /* Give this to the USB subsystem so it can tell us when more data
1122 * arrives. */
1123 result = usb_submit_urb(urb, GFP_ATOMIC);
1124 if (result) {
1125 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1126 __func__, result);
1127 }
1128}
1129
1130
1131
1132
1133static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1134{
1135 int count;
1136 struct urb *curr_urb;
1137
1138 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1139 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1140 count = put_rxbuf_data(curr_urb, serial);
1141 if (count == -1)
1142 return;
1143 if (count == 0) {
1144 serial->curr_rx_urb_idx++;
1145 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1146 serial->curr_rx_urb_idx = 0;
1147 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1148 }
1149 }
1150}
1151
1152static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1153{
1154 int count = 0;
1155 struct urb *urb;
1156
1157 urb = serial->rx_urb[0];
1158 if (serial->port.count > 0) {
1159 count = put_rxbuf_data(urb, serial);
1160 if (count == -1)
1161 return;
1162 }
1163 /* Re issue a read as long as we receive data. */
1164
1165 if (count == 0 && ((urb->actual_length != 0) ||
1166 (serial->rx_state == RX_PENDING))) {
1167 serial->rx_state = RX_SENT;
1168 hso_mux_serial_read(serial);
1169 } else
1170 serial->rx_state = RX_IDLE;
1171}
1172
1173
1174/* read callback for Diag and CS port */
1175static void hso_std_serial_read_bulk_callback(struct urb *urb)
1176{
1177 struct hso_serial *serial = urb->context;
1178 int status = urb->status;
1179 unsigned long flags;
1180
1181 hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status);
1182
1183 /* sanity check */
1184 if (!serial) {
1185 hso_dbg(0x1, "serial == NULL\n");
1186 return;
1187 }
1188 if (status) {
1189 handle_usb_error(status, __func__, serial->parent);
1190 return;
1191 }
1192
1193 hso_dbg(0x1, "Actual length = %d\n", urb->actual_length);
1194 DUMP1(urb->transfer_buffer, urb->actual_length);
1195
1196 /* Anyone listening? */
1197 if (serial->port.count == 0)
1198 return;
1199
1200 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1201 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1202 /* Valid data, handle RX data */
1203 spin_lock_irqsave(&serial->serial_lock, flags);
1204 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1205 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1206 spin_unlock_irqrestore(&serial->serial_lock, flags);
1207}
1208
1209/*
1210 * This needs to be a tasklet otherwise we will
1211 * end up recursively calling this function.
1212 */
1213static void hso_unthrottle_tasklet(struct tasklet_struct *t)
1214{
1215 struct hso_serial *serial = from_tasklet(serial, t,
1216 unthrottle_tasklet);
1217 unsigned long flags;
1218
1219 spin_lock_irqsave(&serial->serial_lock, flags);
1220 if ((serial->parent->port_spec & HSO_INTF_MUX))
1221 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1222 else
1223 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1224 spin_unlock_irqrestore(&serial->serial_lock, flags);
1225}
1226
1227static void hso_unthrottle(struct tty_struct *tty)
1228{
1229 struct hso_serial *serial = tty->driver_data;
1230
1231 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1232}
1233
1234/* open the requested serial port */
1235static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1236{
1237 struct hso_serial *serial = get_serial_by_index(tty->index);
1238 int result;
1239
1240 /* sanity check */
1241 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1242 WARN_ON(1);
1243 tty->driver_data = NULL;
1244 hso_dbg(0x1, "Failed to open port\n");
1245 return -ENODEV;
1246 }
1247
1248 mutex_lock(&serial->parent->mutex);
1249 result = usb_autopm_get_interface(serial->parent->interface);
1250 if (result < 0)
1251 goto err_out;
1252
1253 hso_dbg(0x1, "Opening %d\n", serial->minor);
1254
1255 /* setup */
1256 tty->driver_data = serial;
1257 tty_port_tty_set(&serial->port, tty);
1258
1259 /* check for port already opened, if not set the termios */
1260 serial->port.count++;
1261 if (serial->port.count == 1) {
1262 serial->rx_state = RX_IDLE;
1263 /* Force default termio settings */
1264 _hso_serial_set_termios(tty);
1265 tasklet_setup(&serial->unthrottle_tasklet,
1266 hso_unthrottle_tasklet);
1267 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1268 if (result) {
1269 hso_stop_serial_device(serial->parent);
1270 serial->port.count--;
1271 } else {
1272 kref_get(&serial->parent->ref);
1273 }
1274 } else {
1275 hso_dbg(0x1, "Port was already open\n");
1276 }
1277
1278 usb_autopm_put_interface(serial->parent->interface);
1279
1280 /* done */
1281 if (result)
1282 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1283err_out:
1284 mutex_unlock(&serial->parent->mutex);
1285 return result;
1286}
1287
1288/* close the requested serial port */
1289static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1290{
1291 struct hso_serial *serial = tty->driver_data;
1292 u8 usb_gone;
1293
1294 hso_dbg(0x1, "Closing serial port\n");
1295
1296 /* Open failed, no close cleanup required */
1297 if (serial == NULL)
1298 return;
1299
1300 mutex_lock(&serial->parent->mutex);
1301 usb_gone = serial->parent->usb_gone;
1302
1303 if (!usb_gone)
1304 usb_autopm_get_interface(serial->parent->interface);
1305
1306 /* reset the rts and dtr */
1307 /* do the actual close */
1308 serial->port.count--;
1309
1310 if (serial->port.count <= 0) {
1311 serial->port.count = 0;
1312 tty_port_tty_set(&serial->port, NULL);
1313 if (!usb_gone)
1314 hso_stop_serial_device(serial->parent);
1315 tasklet_kill(&serial->unthrottle_tasklet);
1316 }
1317
1318 if (!usb_gone)
1319 usb_autopm_put_interface(serial->parent->interface);
1320
1321 mutex_unlock(&serial->parent->mutex);
1322}
1323
1324/* close the requested serial port */
1325static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1326 int count)
1327{
1328 struct hso_serial *serial = tty->driver_data;
1329 int space, tx_bytes;
1330 unsigned long flags;
1331
1332 /* sanity check */
1333 if (serial == NULL) {
1334 pr_err("%s: serial is NULL\n", __func__);
1335 return -ENODEV;
1336 }
1337
1338 spin_lock_irqsave(&serial->serial_lock, flags);
1339
1340 space = serial->tx_data_length - serial->tx_buffer_count;
1341 tx_bytes = (count < space) ? count : space;
1342
1343 if (!tx_bytes)
1344 goto out;
1345
1346 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1347 serial->tx_buffer_count += tx_bytes;
1348
1349out:
1350 spin_unlock_irqrestore(&serial->serial_lock, flags);
1351
1352 hso_kick_transmit(serial);
1353 /* done */
1354 return tx_bytes;
1355}
1356
1357/* how much room is there for writing */
1358static unsigned int hso_serial_write_room(struct tty_struct *tty)
1359{
1360 struct hso_serial *serial = tty->driver_data;
1361 unsigned int room;
1362 unsigned long flags;
1363
1364 spin_lock_irqsave(&serial->serial_lock, flags);
1365 room = serial->tx_data_length - serial->tx_buffer_count;
1366 spin_unlock_irqrestore(&serial->serial_lock, flags);
1367
1368 /* return free room */
1369 return room;
1370}
1371
1372static void hso_serial_cleanup(struct tty_struct *tty)
1373{
1374 struct hso_serial *serial = tty->driver_data;
1375
1376 if (!serial)
1377 return;
1378
1379 kref_put(&serial->parent->ref, hso_serial_ref_free);
1380}
1381
1382/* setup the term */
1383static void hso_serial_set_termios(struct tty_struct *tty,
1384 const struct ktermios *old)
1385{
1386 struct hso_serial *serial = tty->driver_data;
1387 unsigned long flags;
1388
1389 if (old)
1390 hso_dbg(0x16, "Termios called with: cflags new[%u] - old[%u]\n",
1391 (unsigned int)tty->termios.c_cflag,
1392 (unsigned int)old->c_cflag);
1393
1394 /* the actual setup */
1395 spin_lock_irqsave(&serial->serial_lock, flags);
1396 if (serial->port.count)
1397 _hso_serial_set_termios(tty);
1398 else
1399 tty->termios = *old;
1400 spin_unlock_irqrestore(&serial->serial_lock, flags);
1401
1402 /* done */
1403}
1404
1405/* how many characters in the buffer */
1406static unsigned int hso_serial_chars_in_buffer(struct tty_struct *tty)
1407{
1408 struct hso_serial *serial = tty->driver_data;
1409 unsigned long flags;
1410 unsigned int chars;
1411
1412 /* sanity check */
1413 if (serial == NULL)
1414 return 0;
1415
1416 spin_lock_irqsave(&serial->serial_lock, flags);
1417 chars = serial->tx_buffer_count;
1418 spin_unlock_irqrestore(&serial->serial_lock, flags);
1419
1420 return chars;
1421}
1422static int tiocmget_submit_urb(struct hso_serial *serial,
1423 struct hso_tiocmget *tiocmget,
1424 struct usb_device *usb)
1425{
1426 int result;
1427
1428 if (serial->parent->usb_gone)
1429 return -ENODEV;
1430 usb_fill_int_urb(tiocmget->urb, usb,
1431 usb_rcvintpipe(usb,
1432 tiocmget->endp->
1433 bEndpointAddress & 0x7F),
1434 tiocmget->serial_state_notification,
1435 sizeof(struct hso_serial_state_notification),
1436 tiocmget_intr_callback, serial,
1437 tiocmget->endp->bInterval);
1438 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1439 if (result) {
1440 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1441 result);
1442 }
1443 return result;
1444
1445}
1446
1447static void tiocmget_intr_callback(struct urb *urb)
1448{
1449 struct hso_serial *serial = urb->context;
1450 struct hso_tiocmget *tiocmget;
1451 int status = urb->status;
1452 u16 UART_state_bitmap, prev_UART_state_bitmap;
1453 struct uart_icount *icount;
1454 struct hso_serial_state_notification *serial_state_notification;
1455 struct usb_device *usb;
1456 struct usb_interface *interface;
1457 int if_num;
1458
1459 /* Sanity checks */
1460 if (!serial)
1461 return;
1462 if (status) {
1463 handle_usb_error(status, __func__, serial->parent);
1464 return;
1465 }
1466
1467 /* tiocmget is only supported on HSO_PORT_MODEM */
1468 tiocmget = serial->tiocmget;
1469 if (!tiocmget)
1470 return;
1471 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1472
1473 usb = serial->parent->usb;
1474 interface = serial->parent->interface;
1475
1476 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1477
1478 /* wIndex should be the USB interface number of the port to which the
1479 * notification applies, which should always be the Modem port.
1480 */
1481 serial_state_notification = tiocmget->serial_state_notification;
1482 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1483 serial_state_notification->bNotification != B_NOTIFICATION ||
1484 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1485 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
1486 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1487 dev_warn(&usb->dev,
1488 "hso received invalid serial state notification\n");
1489 DUMP(serial_state_notification,
1490 sizeof(struct hso_serial_state_notification));
1491 } else {
1492 unsigned long flags;
1493
1494 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1495 UART_state_bitmap);
1496 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1497 icount = &tiocmget->icount;
1498 spin_lock_irqsave(&serial->serial_lock, flags);
1499 if ((UART_state_bitmap & B_OVERRUN) !=
1500 (prev_UART_state_bitmap & B_OVERRUN))
1501 icount->parity++;
1502 if ((UART_state_bitmap & B_PARITY) !=
1503 (prev_UART_state_bitmap & B_PARITY))
1504 icount->parity++;
1505 if ((UART_state_bitmap & B_FRAMING) !=
1506 (prev_UART_state_bitmap & B_FRAMING))
1507 icount->frame++;
1508 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1509 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1510 icount->rng++;
1511 if ((UART_state_bitmap & B_BREAK) !=
1512 (prev_UART_state_bitmap & B_BREAK))
1513 icount->brk++;
1514 if ((UART_state_bitmap & B_TX_CARRIER) !=
1515 (prev_UART_state_bitmap & B_TX_CARRIER))
1516 icount->dsr++;
1517 if ((UART_state_bitmap & B_RX_CARRIER) !=
1518 (prev_UART_state_bitmap & B_RX_CARRIER))
1519 icount->dcd++;
1520 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1521 spin_unlock_irqrestore(&serial->serial_lock, flags);
1522 tiocmget->intr_completed = 1;
1523 wake_up_interruptible(&tiocmget->waitq);
1524 }
1525 memset(serial_state_notification, 0,
1526 sizeof(struct hso_serial_state_notification));
1527 tiocmget_submit_urb(serial,
1528 tiocmget,
1529 serial->parent->usb);
1530}
1531
1532/*
1533 * next few functions largely stolen from drivers/serial/serial_core.c
1534 */
1535/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1536 * - mask passed in arg for lines of interest
1537 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1538 * Caller should use TIOCGICOUNT to see which one it was
1539 */
1540static int
1541hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1542{
1543 DECLARE_WAITQUEUE(wait, current);
1544 struct uart_icount cprev, cnow;
1545 struct hso_tiocmget *tiocmget;
1546 int ret;
1547
1548 tiocmget = serial->tiocmget;
1549 if (!tiocmget)
1550 return -ENOENT;
1551 /*
1552 * note the counters on entry
1553 */
1554 spin_lock_irq(&serial->serial_lock);
1555 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1556 spin_unlock_irq(&serial->serial_lock);
1557 add_wait_queue(&tiocmget->waitq, &wait);
1558 for (;;) {
1559 spin_lock_irq(&serial->serial_lock);
1560 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1561 spin_unlock_irq(&serial->serial_lock);
1562 set_current_state(TASK_INTERRUPTIBLE);
1563 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1564 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1565 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1566 ret = 0;
1567 break;
1568 }
1569 schedule();
1570 /* see if a signal did it */
1571 if (signal_pending(current)) {
1572 ret = -ERESTARTSYS;
1573 break;
1574 }
1575 cprev = cnow;
1576 }
1577 __set_current_state(TASK_RUNNING);
1578 remove_wait_queue(&tiocmget->waitq, &wait);
1579
1580 return ret;
1581}
1582
1583/*
1584 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1585 * Return: write counters to the user passed counter struct
1586 * NB: both 1->0 and 0->1 transitions are counted except for
1587 * RI where only 0->1 is counted.
1588 */
1589static int hso_get_count(struct tty_struct *tty,
1590 struct serial_icounter_struct *icount)
1591{
1592 struct uart_icount cnow;
1593 struct hso_serial *serial = tty->driver_data;
1594 struct hso_tiocmget *tiocmget = serial->tiocmget;
1595
1596 memset(icount, 0, sizeof(struct serial_icounter_struct));
1597
1598 if (!tiocmget)
1599 return -ENOENT;
1600 spin_lock_irq(&serial->serial_lock);
1601 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1602 spin_unlock_irq(&serial->serial_lock);
1603
1604 icount->cts = cnow.cts;
1605 icount->dsr = cnow.dsr;
1606 icount->rng = cnow.rng;
1607 icount->dcd = cnow.dcd;
1608 icount->rx = cnow.rx;
1609 icount->tx = cnow.tx;
1610 icount->frame = cnow.frame;
1611 icount->overrun = cnow.overrun;
1612 icount->parity = cnow.parity;
1613 icount->brk = cnow.brk;
1614 icount->buf_overrun = cnow.buf_overrun;
1615
1616 return 0;
1617}
1618
1619
1620static int hso_serial_tiocmget(struct tty_struct *tty)
1621{
1622 int retval;
1623 struct hso_serial *serial = tty->driver_data;
1624 struct hso_tiocmget *tiocmget;
1625 u16 UART_state_bitmap;
1626
1627 /* sanity check */
1628 if (!serial) {
1629 hso_dbg(0x1, "no tty structures\n");
1630 return -EINVAL;
1631 }
1632 spin_lock_irq(&serial->serial_lock);
1633 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1634 ((serial->dtr_state) ? TIOCM_DTR : 0);
1635 tiocmget = serial->tiocmget;
1636 if (tiocmget) {
1637
1638 UART_state_bitmap = le16_to_cpu(
1639 tiocmget->prev_UART_state_bitmap);
1640 if (UART_state_bitmap & B_RING_SIGNAL)
1641 retval |= TIOCM_RNG;
1642 if (UART_state_bitmap & B_RX_CARRIER)
1643 retval |= TIOCM_CD;
1644 if (UART_state_bitmap & B_TX_CARRIER)
1645 retval |= TIOCM_DSR;
1646 }
1647 spin_unlock_irq(&serial->serial_lock);
1648 return retval;
1649}
1650
1651static int hso_serial_tiocmset(struct tty_struct *tty,
1652 unsigned int set, unsigned int clear)
1653{
1654 int val = 0;
1655 unsigned long flags;
1656 int if_num;
1657 struct hso_serial *serial = tty->driver_data;
1658 struct usb_interface *interface;
1659
1660 /* sanity check */
1661 if (!serial) {
1662 hso_dbg(0x1, "no tty structures\n");
1663 return -EINVAL;
1664 }
1665
1666 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1667 return -EINVAL;
1668
1669 interface = serial->parent->interface;
1670 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1671
1672 spin_lock_irqsave(&serial->serial_lock, flags);
1673 if (set & TIOCM_RTS)
1674 serial->rts_state = 1;
1675 if (set & TIOCM_DTR)
1676 serial->dtr_state = 1;
1677
1678 if (clear & TIOCM_RTS)
1679 serial->rts_state = 0;
1680 if (clear & TIOCM_DTR)
1681 serial->dtr_state = 0;
1682
1683 if (serial->dtr_state)
1684 val |= 0x01;
1685 if (serial->rts_state)
1686 val |= 0x02;
1687
1688 spin_unlock_irqrestore(&serial->serial_lock, flags);
1689
1690 return usb_control_msg(serial->parent->usb,
1691 usb_sndctrlpipe(serial->parent->usb, 0), 0x22,
1692 0x21, val, if_num, NULL, 0,
1693 USB_CTRL_SET_TIMEOUT);
1694}
1695
1696static int hso_serial_ioctl(struct tty_struct *tty,
1697 unsigned int cmd, unsigned long arg)
1698{
1699 struct hso_serial *serial = tty->driver_data;
1700 int ret = 0;
1701 hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg);
1702
1703 if (!serial)
1704 return -ENODEV;
1705 switch (cmd) {
1706 case TIOCMIWAIT:
1707 ret = hso_wait_modem_status(serial, arg);
1708 break;
1709 default:
1710 ret = -ENOIOCTLCMD;
1711 break;
1712 }
1713 return ret;
1714}
1715
1716
1717/* starts a transmit */
1718static void hso_kick_transmit(struct hso_serial *serial)
1719{
1720 unsigned long flags;
1721 int res;
1722
1723 spin_lock_irqsave(&serial->serial_lock, flags);
1724 if (!serial->tx_buffer_count)
1725 goto out;
1726
1727 if (serial->tx_urb_used)
1728 goto out;
1729
1730 /* Wakeup USB interface if necessary */
1731 if (hso_get_activity(serial->parent) == -EAGAIN)
1732 goto out;
1733
1734 /* Switch pointers around to avoid memcpy */
1735 swap(serial->tx_buffer, serial->tx_data);
1736 serial->tx_data_count = serial->tx_buffer_count;
1737 serial->tx_buffer_count = 0;
1738
1739 /* If serial->tx_data is set, it means we switched buffers */
1740 if (serial->tx_data && serial->write_data) {
1741 res = serial->write_data(serial);
1742 if (res >= 0)
1743 serial->tx_urb_used = 1;
1744 }
1745out:
1746 spin_unlock_irqrestore(&serial->serial_lock, flags);
1747}
1748
1749/* make a request (for reading and writing data to muxed serial port) */
1750static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1751 struct urb *ctrl_urb,
1752 struct usb_ctrlrequest *ctrl_req,
1753 u8 *ctrl_urb_data, u32 size)
1754{
1755 int result;
1756 int pipe;
1757
1758 /* Sanity check */
1759 if (!serial || !ctrl_urb || !ctrl_req) {
1760 pr_err("%s: Wrong arguments\n", __func__);
1761 return -EINVAL;
1762 }
1763
1764 /* initialize */
1765 ctrl_req->wValue = 0;
1766 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1767 ctrl_req->wLength = cpu_to_le16(size);
1768
1769 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1770 /* Reading command */
1771 ctrl_req->bRequestType = USB_DIR_IN |
1772 USB_TYPE_OPTION_VENDOR |
1773 USB_RECIP_INTERFACE;
1774 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1775 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1776 } else {
1777 /* Writing command */
1778 ctrl_req->bRequestType = USB_DIR_OUT |
1779 USB_TYPE_OPTION_VENDOR |
1780 USB_RECIP_INTERFACE;
1781 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1782 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1783 }
1784 /* syslog */
1785 hso_dbg(0x2, "%s command (%02x) len: %d, port: %d\n",
1786 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1787 ctrl_req->bRequestType, ctrl_req->wLength, port);
1788
1789 /* Load ctrl urb */
1790 ctrl_urb->transfer_flags = 0;
1791 usb_fill_control_urb(ctrl_urb,
1792 serial->parent->usb,
1793 pipe,
1794 (u8 *) ctrl_req,
1795 ctrl_urb_data, size, ctrl_callback, serial);
1796 /* Send it on merry way */
1797 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1798 if (result) {
1799 dev_err(&ctrl_urb->dev->dev,
1800 "%s failed submit ctrl_urb %d type %d\n", __func__,
1801 result, type);
1802 return result;
1803 }
1804
1805 /* done */
1806 return size;
1807}
1808
1809/* called by intr_callback when read occurs */
1810static int hso_mux_serial_read(struct hso_serial *serial)
1811{
1812 if (!serial)
1813 return -EINVAL;
1814
1815 /* clean data */
1816 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1817 /* make the request */
1818
1819 if (serial->num_rx_urbs != 1) {
1820 dev_err(&serial->parent->interface->dev,
1821 "ERROR: mux'd reads with multiple buffers "
1822 "not possible\n");
1823 return 0;
1824 }
1825 return mux_device_request(serial,
1826 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1827 serial->parent->port_spec & HSO_PORT_MASK,
1828 serial->rx_urb[0],
1829 &serial->ctrl_req_rx,
1830 serial->rx_data[0], serial->rx_data_length);
1831}
1832
1833/* used for muxed serial port callback (muxed serial read) */
1834static void intr_callback(struct urb *urb)
1835{
1836 struct hso_shared_int *shared_int = urb->context;
1837 struct hso_serial *serial;
1838 unsigned char *port_req;
1839 int status = urb->status;
1840 unsigned long flags;
1841 int i;
1842
1843 usb_mark_last_busy(urb->dev);
1844
1845 /* sanity check */
1846 if (!shared_int)
1847 return;
1848
1849 /* status check */
1850 if (status) {
1851 handle_usb_error(status, __func__, NULL);
1852 return;
1853 }
1854 hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status);
1855
1856 /* what request? */
1857 port_req = urb->transfer_buffer;
1858 hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req);
1859 /* loop over all muxed ports to find the one sending this */
1860 for (i = 0; i < 8; i++) {
1861 /* max 8 channels on MUX */
1862 if (*port_req & (1 << i)) {
1863 serial = get_serial_by_shared_int_and_type(shared_int,
1864 (1 << i));
1865 if (serial != NULL) {
1866 hso_dbg(0x1, "Pending read interrupt on port %d\n",
1867 i);
1868 spin_lock_irqsave(&serial->serial_lock, flags);
1869 if (serial->rx_state == RX_IDLE &&
1870 serial->port.count > 0) {
1871 /* Setup and send a ctrl req read on
1872 * port i */
1873 if (!serial->rx_urb_filled[0]) {
1874 serial->rx_state = RX_SENT;
1875 hso_mux_serial_read(serial);
1876 } else
1877 serial->rx_state = RX_PENDING;
1878 } else {
1879 hso_dbg(0x1, "Already a read pending on port %d or port not open\n",
1880 i);
1881 }
1882 spin_unlock_irqrestore(&serial->serial_lock,
1883 flags);
1884 }
1885 }
1886 }
1887 /* Resubmit interrupt urb */
1888 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1889}
1890
1891/* called for writing to muxed serial port */
1892static int hso_mux_serial_write_data(struct hso_serial *serial)
1893{
1894 if (NULL == serial)
1895 return -EINVAL;
1896
1897 return mux_device_request(serial,
1898 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1899 serial->parent->port_spec & HSO_PORT_MASK,
1900 serial->tx_urb,
1901 &serial->ctrl_req_tx,
1902 serial->tx_data, serial->tx_data_count);
1903}
1904
1905/* write callback for Diag and CS port */
1906static void hso_std_serial_write_bulk_callback(struct urb *urb)
1907{
1908 struct hso_serial *serial = urb->context;
1909 int status = urb->status;
1910 unsigned long flags;
1911
1912 /* sanity check */
1913 if (!serial) {
1914 hso_dbg(0x1, "serial == NULL\n");
1915 return;
1916 }
1917
1918 spin_lock_irqsave(&serial->serial_lock, flags);
1919 serial->tx_urb_used = 0;
1920 spin_unlock_irqrestore(&serial->serial_lock, flags);
1921 if (status) {
1922 handle_usb_error(status, __func__, serial->parent);
1923 return;
1924 }
1925 hso_put_activity(serial->parent);
1926 tty_port_tty_wakeup(&serial->port);
1927 hso_kick_transmit(serial);
1928
1929 hso_dbg(0x1, "\n");
1930}
1931
1932/* called for writing diag or CS serial port */
1933static int hso_std_serial_write_data(struct hso_serial *serial)
1934{
1935 int count = serial->tx_data_count;
1936 int result;
1937
1938 usb_fill_bulk_urb(serial->tx_urb,
1939 serial->parent->usb,
1940 usb_sndbulkpipe(serial->parent->usb,
1941 serial->out_endp->
1942 bEndpointAddress & 0x7F),
1943 serial->tx_data, serial->tx_data_count,
1944 hso_std_serial_write_bulk_callback, serial);
1945
1946 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1947 if (result) {
1948 dev_warn(&serial->parent->usb->dev,
1949 "Failed to submit urb - res %d\n", result);
1950 return result;
1951 }
1952
1953 return count;
1954}
1955
1956/* callback after read or write on muxed serial port */
1957static void ctrl_callback(struct urb *urb)
1958{
1959 struct hso_serial *serial = urb->context;
1960 struct usb_ctrlrequest *req;
1961 int status = urb->status;
1962 unsigned long flags;
1963
1964 /* sanity check */
1965 if (!serial)
1966 return;
1967
1968 spin_lock_irqsave(&serial->serial_lock, flags);
1969 serial->tx_urb_used = 0;
1970 spin_unlock_irqrestore(&serial->serial_lock, flags);
1971 if (status) {
1972 handle_usb_error(status, __func__, serial->parent);
1973 return;
1974 }
1975
1976 /* what request? */
1977 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1978 hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status);
1979 hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length);
1980 DUMP1(urb->transfer_buffer, urb->actual_length);
1981
1982 if (req->bRequestType ==
1983 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1984 /* response to a read command */
1985 serial->rx_urb_filled[0] = 1;
1986 spin_lock_irqsave(&serial->serial_lock, flags);
1987 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1988 spin_unlock_irqrestore(&serial->serial_lock, flags);
1989 } else {
1990 hso_put_activity(serial->parent);
1991 tty_port_tty_wakeup(&serial->port);
1992 /* response to a write command */
1993 hso_kick_transmit(serial);
1994 }
1995}
1996
1997/* handle RX data for serial port */
1998static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
1999{
2000 struct tty_struct *tty;
2001 int count;
2002
2003 /* Sanity check */
2004 if (urb == NULL || serial == NULL) {
2005 hso_dbg(0x1, "serial = NULL\n");
2006 return -2;
2007 }
2008
2009 tty = tty_port_tty_get(&serial->port);
2010
2011 if (tty && tty_throttled(tty)) {
2012 tty_kref_put(tty);
2013 return -1;
2014 }
2015
2016 /* Push data to tty */
2017 hso_dbg(0x1, "data to push to tty\n");
2018 count = tty_buffer_request_room(&serial->port, urb->actual_length);
2019 if (count >= urb->actual_length) {
2020 tty_insert_flip_string(&serial->port, urb->transfer_buffer,
2021 urb->actual_length);
2022 tty_flip_buffer_push(&serial->port);
2023 } else {
2024 dev_warn(&serial->parent->usb->dev,
2025 "dropping data, %d bytes lost\n", urb->actual_length);
2026 }
2027
2028 tty_kref_put(tty);
2029
2030 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2031
2032 return 0;
2033}
2034
2035
2036/* Base driver functions */
2037
2038static void hso_log_port(struct hso_device *hso_dev)
2039{
2040 char *port_type;
2041 char port_dev[20];
2042
2043 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2044 case HSO_PORT_CONTROL:
2045 port_type = "Control";
2046 break;
2047 case HSO_PORT_APP:
2048 port_type = "Application";
2049 break;
2050 case HSO_PORT_GPS:
2051 port_type = "GPS";
2052 break;
2053 case HSO_PORT_GPS_CONTROL:
2054 port_type = "GPS control";
2055 break;
2056 case HSO_PORT_APP2:
2057 port_type = "Application2";
2058 break;
2059 case HSO_PORT_PCSC:
2060 port_type = "PCSC";
2061 break;
2062 case HSO_PORT_DIAG:
2063 port_type = "Diagnostic";
2064 break;
2065 case HSO_PORT_DIAG2:
2066 port_type = "Diagnostic2";
2067 break;
2068 case HSO_PORT_MODEM:
2069 port_type = "Modem";
2070 break;
2071 case HSO_PORT_NETWORK:
2072 port_type = "Network";
2073 break;
2074 default:
2075 port_type = "Unknown";
2076 break;
2077 }
2078 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2079 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2080 } else
2081 sprintf(port_dev, "/dev/%s%d", tty_filename,
2082 dev2ser(hso_dev)->minor);
2083
2084 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2085 port_type, port_dev);
2086}
2087
2088static int hso_start_net_device(struct hso_device *hso_dev)
2089{
2090 int i, result = 0;
2091 struct hso_net *hso_net = dev2net(hso_dev);
2092
2093 if (!hso_net)
2094 return -ENODEV;
2095
2096 /* send URBs for all read buffers */
2097 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2098
2099 /* Prep a receive URB */
2100 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2101 hso_dev->usb,
2102 usb_rcvbulkpipe(hso_dev->usb,
2103 hso_net->in_endp->
2104 bEndpointAddress & 0x7F),
2105 hso_net->mux_bulk_rx_buf_pool[i],
2106 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2107 hso_net);
2108
2109 /* Put it out there so the device can send us stuff */
2110 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2111 GFP_NOIO);
2112 if (result)
2113 dev_warn(&hso_dev->usb->dev,
2114 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2115 i, result);
2116 }
2117
2118 return result;
2119}
2120
2121static int hso_stop_net_device(struct hso_device *hso_dev)
2122{
2123 int i;
2124 struct hso_net *hso_net = dev2net(hso_dev);
2125
2126 if (!hso_net)
2127 return -ENODEV;
2128
2129 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2130 if (hso_net->mux_bulk_rx_urb_pool[i])
2131 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2132
2133 }
2134 if (hso_net->mux_bulk_tx_urb)
2135 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2136
2137 return 0;
2138}
2139
2140static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2141{
2142 int i, result = 0;
2143 struct hso_serial *serial = dev2ser(hso_dev);
2144
2145 if (!serial)
2146 return -ENODEV;
2147
2148 /* If it is not the MUX port fill in and submit a bulk urb (already
2149 * allocated in hso_serial_start) */
2150 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2151 for (i = 0; i < serial->num_rx_urbs; i++) {
2152 usb_fill_bulk_urb(serial->rx_urb[i],
2153 serial->parent->usb,
2154 usb_rcvbulkpipe(serial->parent->usb,
2155 serial->in_endp->
2156 bEndpointAddress &
2157 0x7F),
2158 serial->rx_data[i],
2159 serial->rx_data_length,
2160 hso_std_serial_read_bulk_callback,
2161 serial);
2162 result = usb_submit_urb(serial->rx_urb[i], flags);
2163 if (result) {
2164 dev_warn(&serial->parent->usb->dev,
2165 "Failed to submit urb - res %d\n",
2166 result);
2167 break;
2168 }
2169 }
2170 } else {
2171 mutex_lock(&serial->shared_int->shared_int_lock);
2172 if (!serial->shared_int->use_count) {
2173 result =
2174 hso_mux_submit_intr_urb(serial->shared_int,
2175 hso_dev->usb, flags);
2176 }
2177 serial->shared_int->use_count++;
2178 mutex_unlock(&serial->shared_int->shared_int_lock);
2179 }
2180 if (serial->tiocmget)
2181 tiocmget_submit_urb(serial,
2182 serial->tiocmget,
2183 serial->parent->usb);
2184 return result;
2185}
2186
2187static int hso_stop_serial_device(struct hso_device *hso_dev)
2188{
2189 int i;
2190 struct hso_serial *serial = dev2ser(hso_dev);
2191 struct hso_tiocmget *tiocmget;
2192
2193 if (!serial)
2194 return -ENODEV;
2195
2196 for (i = 0; i < serial->num_rx_urbs; i++) {
2197 if (serial->rx_urb[i]) {
2198 usb_kill_urb(serial->rx_urb[i]);
2199 serial->rx_urb_filled[i] = 0;
2200 }
2201 }
2202 serial->curr_rx_urb_idx = 0;
2203
2204 if (serial->tx_urb)
2205 usb_kill_urb(serial->tx_urb);
2206
2207 if (serial->shared_int) {
2208 mutex_lock(&serial->shared_int->shared_int_lock);
2209 if (serial->shared_int->use_count &&
2210 (--serial->shared_int->use_count == 0)) {
2211 struct urb *urb;
2212
2213 urb = serial->shared_int->shared_intr_urb;
2214 if (urb)
2215 usb_kill_urb(urb);
2216 }
2217 mutex_unlock(&serial->shared_int->shared_int_lock);
2218 }
2219 tiocmget = serial->tiocmget;
2220 if (tiocmget) {
2221 wake_up_interruptible(&tiocmget->waitq);
2222 usb_kill_urb(tiocmget->urb);
2223 }
2224
2225 return 0;
2226}
2227
2228static void hso_serial_tty_unregister(struct hso_serial *serial)
2229{
2230 tty_unregister_device(tty_drv, serial->minor);
2231 release_minor(serial);
2232}
2233
2234static void hso_serial_common_free(struct hso_serial *serial)
2235{
2236 int i;
2237
2238 for (i = 0; i < serial->num_rx_urbs; i++) {
2239 /* unlink and free RX URB */
2240 usb_free_urb(serial->rx_urb[i]);
2241 /* free the RX buffer */
2242 kfree(serial->rx_data[i]);
2243 }
2244
2245 /* unlink and free TX URB */
2246 usb_free_urb(serial->tx_urb);
2247 kfree(serial->tx_buffer);
2248 kfree(serial->tx_data);
2249 tty_port_destroy(&serial->port);
2250}
2251
2252static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2253 int rx_size, int tx_size)
2254{
2255 int i;
2256
2257 tty_port_init(&serial->port);
2258
2259 if (obtain_minor(serial))
2260 goto exit2;
2261
2262 /* register our minor number */
2263 serial->parent->dev = tty_port_register_device_attr(&serial->port,
2264 tty_drv, serial->minor, &serial->parent->interface->dev,
2265 serial->parent, hso_serial_dev_groups);
2266 if (IS_ERR(serial->parent->dev)) {
2267 release_minor(serial);
2268 goto exit2;
2269 }
2270
2271 serial->magic = HSO_SERIAL_MAGIC;
2272 spin_lock_init(&serial->serial_lock);
2273 serial->num_rx_urbs = num_urbs;
2274
2275 /* RX, allocate urb and initialize */
2276
2277 /* prepare our RX buffer */
2278 serial->rx_data_length = rx_size;
2279 for (i = 0; i < serial->num_rx_urbs; i++) {
2280 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2281 if (!serial->rx_urb[i])
2282 goto exit;
2283 serial->rx_urb[i]->transfer_buffer = NULL;
2284 serial->rx_urb[i]->transfer_buffer_length = 0;
2285 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2286 GFP_KERNEL);
2287 if (!serial->rx_data[i])
2288 goto exit;
2289 }
2290
2291 /* TX, allocate urb and initialize */
2292 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2293 if (!serial->tx_urb)
2294 goto exit;
2295 serial->tx_urb->transfer_buffer = NULL;
2296 serial->tx_urb->transfer_buffer_length = 0;
2297 /* prepare our TX buffer */
2298 serial->tx_data_count = 0;
2299 serial->tx_buffer_count = 0;
2300 serial->tx_data_length = tx_size;
2301 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2302 if (!serial->tx_data)
2303 goto exit;
2304
2305 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2306 if (!serial->tx_buffer)
2307 goto exit;
2308
2309 return 0;
2310exit:
2311 hso_serial_tty_unregister(serial);
2312exit2:
2313 hso_serial_common_free(serial);
2314 return -1;
2315}
2316
2317/* Creates a general hso device */
2318static struct hso_device *hso_create_device(struct usb_interface *intf,
2319 int port_spec)
2320{
2321 struct hso_device *hso_dev;
2322
2323 hso_dev = kzalloc(sizeof(*hso_dev), GFP_KERNEL);
2324 if (!hso_dev)
2325 return NULL;
2326
2327 hso_dev->port_spec = port_spec;
2328 hso_dev->usb = interface_to_usbdev(intf);
2329 hso_dev->interface = intf;
2330 kref_init(&hso_dev->ref);
2331 mutex_init(&hso_dev->mutex);
2332
2333 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2334 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2335
2336 return hso_dev;
2337}
2338
2339/* Removes a network device in the network device table */
2340static int remove_net_device(struct hso_device *hso_dev)
2341{
2342 int i;
2343
2344 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2345 if (network_table[i] == hso_dev) {
2346 network_table[i] = NULL;
2347 break;
2348 }
2349 }
2350 if (i == HSO_MAX_NET_DEVICES)
2351 return -1;
2352 return 0;
2353}
2354
2355/* Frees our network device */
2356static void hso_free_net_device(struct hso_device *hso_dev)
2357{
2358 int i;
2359 struct hso_net *hso_net = dev2net(hso_dev);
2360
2361 if (!hso_net)
2362 return;
2363
2364 remove_net_device(hso_net->parent);
2365
2366 if (hso_net->net)
2367 unregister_netdev(hso_net->net);
2368
2369 /* start freeing */
2370 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2371 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2372 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2373 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2374 }
2375 usb_free_urb(hso_net->mux_bulk_tx_urb);
2376 kfree(hso_net->mux_bulk_tx_buf);
2377 hso_net->mux_bulk_tx_buf = NULL;
2378
2379 if (hso_net->net)
2380 free_netdev(hso_net->net);
2381
2382 kfree(hso_dev);
2383}
2384
2385static const struct net_device_ops hso_netdev_ops = {
2386 .ndo_open = hso_net_open,
2387 .ndo_stop = hso_net_close,
2388 .ndo_start_xmit = hso_net_start_xmit,
2389 .ndo_tx_timeout = hso_net_tx_timeout,
2390};
2391
2392/* initialize the network interface */
2393static void hso_net_init(struct net_device *net)
2394{
2395 struct hso_net *hso_net = netdev_priv(net);
2396
2397 hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net));
2398
2399 /* fill in the other fields */
2400 net->netdev_ops = &hso_netdev_ops;
2401 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2402 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2403 net->type = ARPHRD_NONE;
2404 net->mtu = DEFAULT_MTU - 14;
2405 net->tx_queue_len = 10;
2406 net->ethtool_ops = &ops;
2407
2408 /* and initialize the semaphore */
2409 spin_lock_init(&hso_net->net_lock);
2410}
2411
2412/* Adds a network device in the network device table */
2413static int add_net_device(struct hso_device *hso_dev)
2414{
2415 int i;
2416
2417 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2418 if (network_table[i] == NULL) {
2419 network_table[i] = hso_dev;
2420 break;
2421 }
2422 }
2423 if (i == HSO_MAX_NET_DEVICES)
2424 return -1;
2425 return 0;
2426}
2427
2428static int hso_rfkill_set_block(void *data, bool blocked)
2429{
2430 struct hso_device *hso_dev = data;
2431 int enabled = !blocked;
2432 int rv;
2433
2434 mutex_lock(&hso_dev->mutex);
2435 if (hso_dev->usb_gone)
2436 rv = 0;
2437 else
2438 rv = usb_control_msg(hso_dev->usb, usb_sndctrlpipe(hso_dev->usb, 0),
2439 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2440 USB_CTRL_SET_TIMEOUT);
2441 mutex_unlock(&hso_dev->mutex);
2442 return rv;
2443}
2444
2445static const struct rfkill_ops hso_rfkill_ops = {
2446 .set_block = hso_rfkill_set_block,
2447};
2448
2449/* Creates and sets up everything for rfkill */
2450static void hso_create_rfkill(struct hso_device *hso_dev,
2451 struct usb_interface *interface)
2452{
2453 struct hso_net *hso_net = dev2net(hso_dev);
2454 struct device *dev = &hso_net->net->dev;
2455 static u32 rfkill_counter;
2456
2457 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d",
2458 rfkill_counter++);
2459
2460 hso_net->rfkill = rfkill_alloc(hso_net->name,
2461 &interface_to_usbdev(interface)->dev,
2462 RFKILL_TYPE_WWAN,
2463 &hso_rfkill_ops, hso_dev);
2464 if (!hso_net->rfkill)
2465 return;
2466
2467 if (rfkill_register(hso_net->rfkill) < 0) {
2468 rfkill_destroy(hso_net->rfkill);
2469 hso_net->rfkill = NULL;
2470 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2471 return;
2472 }
2473}
2474
2475static struct device_type hso_type = {
2476 .name = "wwan",
2477};
2478
2479/* Creates our network device */
2480static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2481 int port_spec)
2482{
2483 int result, i;
2484 struct net_device *net;
2485 struct hso_net *hso_net;
2486 struct hso_device *hso_dev;
2487
2488 hso_dev = hso_create_device(interface, port_spec);
2489 if (!hso_dev)
2490 return NULL;
2491
2492 /* allocate our network device, then we can put in our private data */
2493 /* call hso_net_init to do the basic initialization */
2494 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN,
2495 hso_net_init);
2496 if (!net) {
2497 dev_err(&interface->dev, "Unable to create ethernet device\n");
2498 goto err_hso_dev;
2499 }
2500
2501 hso_net = netdev_priv(net);
2502
2503 hso_dev->port_data.dev_net = hso_net;
2504 hso_net->net = net;
2505 hso_net->parent = hso_dev;
2506
2507 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2508 USB_DIR_IN);
2509 if (!hso_net->in_endp) {
2510 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2511 goto err_net;
2512 }
2513 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2514 USB_DIR_OUT);
2515 if (!hso_net->out_endp) {
2516 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2517 goto err_net;
2518 }
2519 SET_NETDEV_DEV(net, &interface->dev);
2520 SET_NETDEV_DEVTYPE(net, &hso_type);
2521
2522 /* start allocating */
2523 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2524 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2525 if (!hso_net->mux_bulk_rx_urb_pool[i])
2526 goto err_mux_bulk_rx;
2527 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2528 GFP_KERNEL);
2529 if (!hso_net->mux_bulk_rx_buf_pool[i])
2530 goto err_mux_bulk_rx;
2531 }
2532 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2533 if (!hso_net->mux_bulk_tx_urb)
2534 goto err_mux_bulk_rx;
2535 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2536 if (!hso_net->mux_bulk_tx_buf)
2537 goto err_free_tx_urb;
2538
2539 result = add_net_device(hso_dev);
2540 if (result) {
2541 dev_err(&interface->dev, "Failed to add net device\n");
2542 goto err_free_tx_buf;
2543 }
2544
2545 /* registering our net device */
2546 result = register_netdev(net);
2547 if (result) {
2548 dev_err(&interface->dev, "Failed to register device\n");
2549 goto err_rmv_ndev;
2550 }
2551
2552 hso_log_port(hso_dev);
2553
2554 hso_create_rfkill(hso_dev, interface);
2555
2556 return hso_dev;
2557
2558err_rmv_ndev:
2559 remove_net_device(hso_dev);
2560err_free_tx_buf:
2561 kfree(hso_net->mux_bulk_tx_buf);
2562err_free_tx_urb:
2563 usb_free_urb(hso_net->mux_bulk_tx_urb);
2564err_mux_bulk_rx:
2565 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2566 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2567 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2568 }
2569err_net:
2570 free_netdev(net);
2571err_hso_dev:
2572 kfree(hso_dev);
2573 return NULL;
2574}
2575
2576static void hso_free_tiomget(struct hso_serial *serial)
2577{
2578 struct hso_tiocmget *tiocmget;
2579 if (!serial)
2580 return;
2581 tiocmget = serial->tiocmget;
2582 if (tiocmget) {
2583 usb_free_urb(tiocmget->urb);
2584 tiocmget->urb = NULL;
2585 serial->tiocmget = NULL;
2586 kfree(tiocmget->serial_state_notification);
2587 tiocmget->serial_state_notification = NULL;
2588 kfree(tiocmget);
2589 }
2590}
2591
2592/* Frees an AT channel ( goes for both mux and non-mux ) */
2593static void hso_free_serial_device(struct hso_device *hso_dev)
2594{
2595 struct hso_serial *serial = dev2ser(hso_dev);
2596
2597 if (!serial)
2598 return;
2599
2600 hso_serial_common_free(serial);
2601
2602 if (serial->shared_int) {
2603 mutex_lock(&serial->shared_int->shared_int_lock);
2604 if (--serial->shared_int->ref_count == 0)
2605 hso_free_shared_int(serial->shared_int);
2606 else
2607 mutex_unlock(&serial->shared_int->shared_int_lock);
2608 }
2609 hso_free_tiomget(serial);
2610 kfree(serial);
2611 kfree(hso_dev);
2612}
2613
2614/* Creates a bulk AT channel */
2615static struct hso_device *hso_create_bulk_serial_device(
2616 struct usb_interface *interface, int port)
2617{
2618 struct hso_device *hso_dev;
2619 struct hso_serial *serial;
2620 int num_urbs;
2621 struct hso_tiocmget *tiocmget;
2622
2623 hso_dev = hso_create_device(interface, port);
2624 if (!hso_dev)
2625 return NULL;
2626
2627 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2628 if (!serial)
2629 goto exit;
2630
2631 serial->parent = hso_dev;
2632 hso_dev->port_data.dev_serial = serial;
2633
2634 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2635 num_urbs = 2;
2636 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2637 GFP_KERNEL);
2638 if (!serial->tiocmget)
2639 goto exit;
2640 serial->tiocmget->serial_state_notification
2641 = kzalloc(sizeof(struct hso_serial_state_notification),
2642 GFP_KERNEL);
2643 if (!serial->tiocmget->serial_state_notification)
2644 goto exit;
2645 tiocmget = serial->tiocmget;
2646 tiocmget->endp = hso_get_ep(interface,
2647 USB_ENDPOINT_XFER_INT,
2648 USB_DIR_IN);
2649 if (!tiocmget->endp) {
2650 dev_err(&interface->dev, "Failed to find INT IN ep\n");
2651 goto exit;
2652 }
2653
2654 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2655 if (!tiocmget->urb)
2656 goto exit;
2657
2658 mutex_init(&tiocmget->mutex);
2659 init_waitqueue_head(&tiocmget->waitq);
2660 } else {
2661 num_urbs = 1;
2662 }
2663
2664 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2665 BULK_URB_TX_SIZE))
2666 goto exit;
2667
2668 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2669 USB_DIR_IN);
2670 if (!serial->in_endp) {
2671 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2672 goto exit2;
2673 }
2674
2675 if (!
2676 (serial->out_endp =
2677 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2678 dev_err(&interface->dev, "Failed to find BULK OUT ep\n");
2679 goto exit2;
2680 }
2681
2682 serial->write_data = hso_std_serial_write_data;
2683
2684 /* setup the proc dirs and files if needed */
2685 hso_log_port(hso_dev);
2686
2687 /* done, return it */
2688 return hso_dev;
2689
2690exit2:
2691 hso_serial_tty_unregister(serial);
2692 hso_serial_common_free(serial);
2693exit:
2694 hso_free_tiomget(serial);
2695 kfree(serial);
2696 kfree(hso_dev);
2697 return NULL;
2698}
2699
2700/* Creates a multiplexed AT channel */
2701static
2702struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2703 int port,
2704 struct hso_shared_int *mux)
2705{
2706 struct hso_device *hso_dev;
2707 struct hso_serial *serial;
2708 int port_spec;
2709
2710 port_spec = HSO_INTF_MUX;
2711 port_spec &= ~HSO_PORT_MASK;
2712
2713 port_spec |= hso_mux_to_port(port);
2714 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2715 return NULL;
2716
2717 hso_dev = hso_create_device(interface, port_spec);
2718 if (!hso_dev)
2719 return NULL;
2720
2721 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2722 if (!serial)
2723 goto err_free_dev;
2724
2725 hso_dev->port_data.dev_serial = serial;
2726 serial->parent = hso_dev;
2727
2728 if (hso_serial_common_create
2729 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2730 goto err_free_serial;
2731
2732 serial->tx_data_length--;
2733 serial->write_data = hso_mux_serial_write_data;
2734
2735 serial->shared_int = mux;
2736 mutex_lock(&serial->shared_int->shared_int_lock);
2737 serial->shared_int->ref_count++;
2738 mutex_unlock(&serial->shared_int->shared_int_lock);
2739
2740 /* setup the proc dirs and files if needed */
2741 hso_log_port(hso_dev);
2742
2743 /* done, return it */
2744 return hso_dev;
2745
2746err_free_serial:
2747 kfree(serial);
2748err_free_dev:
2749 kfree(hso_dev);
2750 return NULL;
2751
2752}
2753
2754static void hso_free_shared_int(struct hso_shared_int *mux)
2755{
2756 usb_free_urb(mux->shared_intr_urb);
2757 kfree(mux->shared_intr_buf);
2758 mutex_unlock(&mux->shared_int_lock);
2759 kfree(mux);
2760}
2761
2762static
2763struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2764{
2765 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2766
2767 if (!mux)
2768 return NULL;
2769
2770 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2771 USB_DIR_IN);
2772 if (!mux->intr_endp) {
2773 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2774 goto exit;
2775 }
2776
2777 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2778 if (!mux->shared_intr_urb)
2779 goto exit;
2780 mux->shared_intr_buf =
2781 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2782 GFP_KERNEL);
2783 if (!mux->shared_intr_buf)
2784 goto exit;
2785
2786 mutex_init(&mux->shared_int_lock);
2787
2788 return mux;
2789
2790exit:
2791 kfree(mux->shared_intr_buf);
2792 usb_free_urb(mux->shared_intr_urb);
2793 kfree(mux);
2794 return NULL;
2795}
2796
2797/* Gets the port spec for a certain interface */
2798static int hso_get_config_data(struct usb_interface *interface)
2799{
2800 struct usb_device *usbdev = interface_to_usbdev(interface);
2801 u8 *config_data = kmalloc(17, GFP_KERNEL);
2802 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2803 s32 result;
2804
2805 if (!config_data)
2806 return -ENOMEM;
2807 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2808 0x86, 0xC0, 0, 0, config_data, 17,
2809 USB_CTRL_SET_TIMEOUT) != 0x11) {
2810 kfree(config_data);
2811 return -EIO;
2812 }
2813
2814 /* check if we have a valid interface */
2815 if (if_num > 16) {
2816 kfree(config_data);
2817 return -EINVAL;
2818 }
2819
2820 switch (config_data[if_num]) {
2821 case 0x0:
2822 result = 0;
2823 break;
2824 case 0x1:
2825 result = HSO_PORT_DIAG;
2826 break;
2827 case 0x2:
2828 result = HSO_PORT_GPS;
2829 break;
2830 case 0x3:
2831 result = HSO_PORT_GPS_CONTROL;
2832 break;
2833 case 0x4:
2834 result = HSO_PORT_APP;
2835 break;
2836 case 0x5:
2837 result = HSO_PORT_APP2;
2838 break;
2839 case 0x6:
2840 result = HSO_PORT_CONTROL;
2841 break;
2842 case 0x7:
2843 result = HSO_PORT_NETWORK;
2844 break;
2845 case 0x8:
2846 result = HSO_PORT_MODEM;
2847 break;
2848 case 0x9:
2849 result = HSO_PORT_MSD;
2850 break;
2851 case 0xa:
2852 result = HSO_PORT_PCSC;
2853 break;
2854 case 0xb:
2855 result = HSO_PORT_VOICE;
2856 break;
2857 default:
2858 result = 0;
2859 }
2860
2861 if (result)
2862 result |= HSO_INTF_BULK;
2863
2864 if (config_data[16] & 0x1)
2865 result |= HSO_INFO_CRC_BUG;
2866
2867 kfree(config_data);
2868 return result;
2869}
2870
2871/* called once for each interface upon device insertion */
2872static int hso_probe(struct usb_interface *interface,
2873 const struct usb_device_id *id)
2874{
2875 int mux, i, if_num, port_spec;
2876 unsigned char port_mask;
2877 struct hso_device *hso_dev = NULL;
2878 struct hso_shared_int *shared_int;
2879 struct hso_device *tmp_dev = NULL;
2880
2881 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2882 dev_err(&interface->dev, "Not our interface\n");
2883 return -ENODEV;
2884 }
2885
2886 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2887
2888 /* Get the interface/port specification from either driver_info or from
2889 * the device itself */
2890 if (id->driver_info) {
2891 /* if_num is controlled by the device, driver_info is a 0 terminated
2892 * array. Make sure, the access is in bounds! */
2893 for (i = 0; i <= if_num; ++i)
2894 if (((u32 *)(id->driver_info))[i] == 0)
2895 goto exit;
2896 port_spec = ((u32 *)(id->driver_info))[if_num];
2897 } else {
2898 port_spec = hso_get_config_data(interface);
2899 if (port_spec < 0)
2900 goto exit;
2901 }
2902
2903 /* Check if we need to switch to alt interfaces prior to port
2904 * configuration */
2905 if (interface->num_altsetting > 1)
2906 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2907 interface->needs_remote_wakeup = 1;
2908
2909 /* Allocate new hso device(s) */
2910 switch (port_spec & HSO_INTF_MASK) {
2911 case HSO_INTF_MUX:
2912 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2913 /* Create the network device */
2914 if (!disable_net) {
2915 hso_dev = hso_create_net_device(interface,
2916 port_spec);
2917 if (!hso_dev)
2918 goto exit;
2919 tmp_dev = hso_dev;
2920 }
2921 }
2922
2923 if (hso_get_mux_ports(interface, &port_mask))
2924 /* TODO: de-allocate everything */
2925 goto exit;
2926
2927 shared_int = hso_create_shared_int(interface);
2928 if (!shared_int)
2929 goto exit;
2930
2931 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2932 if (port_mask & i) {
2933 hso_dev = hso_create_mux_serial_device(
2934 interface, i, shared_int);
2935 if (!hso_dev)
2936 goto exit;
2937 }
2938 }
2939
2940 if (tmp_dev)
2941 hso_dev = tmp_dev;
2942 break;
2943
2944 case HSO_INTF_BULK:
2945 /* It's a regular bulk interface */
2946 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2947 if (!disable_net)
2948 hso_dev =
2949 hso_create_net_device(interface, port_spec);
2950 } else {
2951 hso_dev =
2952 hso_create_bulk_serial_device(interface, port_spec);
2953 }
2954 if (!hso_dev)
2955 goto exit;
2956 break;
2957 default:
2958 goto exit;
2959 }
2960
2961 /* save our data pointer in this device */
2962 usb_set_intfdata(interface, hso_dev);
2963
2964 /* done */
2965 return 0;
2966exit:
2967 hso_free_interface(interface);
2968 return -ENODEV;
2969}
2970
2971/* device removed, cleaning up */
2972static void hso_disconnect(struct usb_interface *interface)
2973{
2974 hso_free_interface(interface);
2975
2976 /* remove reference of our private data */
2977 usb_set_intfdata(interface, NULL);
2978}
2979
2980static void async_get_intf(struct work_struct *data)
2981{
2982 struct hso_device *hso_dev =
2983 container_of(data, struct hso_device, async_get_intf);
2984 usb_autopm_get_interface(hso_dev->interface);
2985}
2986
2987static void async_put_intf(struct work_struct *data)
2988{
2989 struct hso_device *hso_dev =
2990 container_of(data, struct hso_device, async_put_intf);
2991 usb_autopm_put_interface(hso_dev->interface);
2992}
2993
2994static int hso_get_activity(struct hso_device *hso_dev)
2995{
2996 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2997 if (!hso_dev->is_active) {
2998 hso_dev->is_active = 1;
2999 schedule_work(&hso_dev->async_get_intf);
3000 }
3001 }
3002
3003 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3004 return -EAGAIN;
3005
3006 usb_mark_last_busy(hso_dev->usb);
3007
3008 return 0;
3009}
3010
3011static int hso_put_activity(struct hso_device *hso_dev)
3012{
3013 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3014 if (hso_dev->is_active) {
3015 hso_dev->is_active = 0;
3016 schedule_work(&hso_dev->async_put_intf);
3017 return -EAGAIN;
3018 }
3019 }
3020 hso_dev->is_active = 0;
3021 return 0;
3022}
3023
3024/* called by kernel when we need to suspend device */
3025static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3026{
3027 int i, result;
3028
3029 /* Stop all serial ports */
3030 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3031 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3032 result = hso_stop_serial_device(serial_table[i]);
3033 if (result)
3034 goto out;
3035 }
3036 }
3037
3038 /* Stop all network ports */
3039 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3040 if (network_table[i] &&
3041 (network_table[i]->interface == iface)) {
3042 result = hso_stop_net_device(network_table[i]);
3043 if (result)
3044 goto out;
3045 }
3046 }
3047
3048out:
3049 return 0;
3050}
3051
3052/* called by kernel when we need to resume device */
3053static int hso_resume(struct usb_interface *iface)
3054{
3055 int i, result = 0;
3056 struct hso_net *hso_net;
3057
3058 /* Start all serial ports */
3059 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3060 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3061 if (dev2ser(serial_table[i])->port.count) {
3062 result =
3063 hso_start_serial_device(serial_table[i], GFP_NOIO);
3064 hso_kick_transmit(dev2ser(serial_table[i]));
3065 if (result)
3066 goto out;
3067 }
3068 }
3069 }
3070
3071 /* Start all network ports */
3072 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3073 if (network_table[i] &&
3074 (network_table[i]->interface == iface)) {
3075 hso_net = dev2net(network_table[i]);
3076 if (hso_net->flags & IFF_UP) {
3077 /* First transmit any lingering data,
3078 then restart the device. */
3079 if (hso_net->skb_tx_buf) {
3080 dev_dbg(&iface->dev,
3081 "Transmitting"
3082 " lingering data\n");
3083 hso_net_start_xmit(hso_net->skb_tx_buf,
3084 hso_net->net);
3085 hso_net->skb_tx_buf = NULL;
3086 }
3087 result = hso_start_net_device(network_table[i]);
3088 if (result)
3089 goto out;
3090 }
3091 }
3092 }
3093
3094out:
3095 return result;
3096}
3097
3098static void hso_serial_ref_free(struct kref *ref)
3099{
3100 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3101
3102 hso_free_serial_device(hso_dev);
3103}
3104
3105static void hso_free_interface(struct usb_interface *interface)
3106{
3107 struct hso_serial *serial;
3108 int i;
3109
3110 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3111 if (serial_table[i] &&
3112 (serial_table[i]->interface == interface)) {
3113 serial = dev2ser(serial_table[i]);
3114 tty_port_tty_hangup(&serial->port, false);
3115 mutex_lock(&serial->parent->mutex);
3116 serial->parent->usb_gone = 1;
3117 mutex_unlock(&serial->parent->mutex);
3118 cancel_work_sync(&serial_table[i]->async_put_intf);
3119 cancel_work_sync(&serial_table[i]->async_get_intf);
3120 hso_serial_tty_unregister(serial);
3121 kref_put(&serial->parent->ref, hso_serial_ref_free);
3122 }
3123 }
3124
3125 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3126 if (network_table[i] &&
3127 (network_table[i]->interface == interface)) {
3128 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3129 /* hso_stop_net_device doesn't stop the net queue since
3130 * traffic needs to start it again when suspended */
3131 netif_stop_queue(dev2net(network_table[i])->net);
3132 hso_stop_net_device(network_table[i]);
3133 cancel_work_sync(&network_table[i]->async_put_intf);
3134 cancel_work_sync(&network_table[i]->async_get_intf);
3135 if (rfk) {
3136 rfkill_unregister(rfk);
3137 rfkill_destroy(rfk);
3138 }
3139 hso_free_net_device(network_table[i]);
3140 }
3141 }
3142}
3143
3144/* Helper functions */
3145
3146/* Get the endpoint ! */
3147static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3148 int type, int dir)
3149{
3150 int i;
3151 struct usb_host_interface *iface = intf->cur_altsetting;
3152 struct usb_endpoint_descriptor *endp;
3153
3154 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3155 endp = &iface->endpoint[i].desc;
3156 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3157 (usb_endpoint_type(endp) == type))
3158 return endp;
3159 }
3160
3161 return NULL;
3162}
3163
3164/* Get the byte that describes which ports are enabled */
3165static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3166{
3167 int i;
3168 struct usb_host_interface *iface = intf->cur_altsetting;
3169
3170 if (iface->extralen == 3) {
3171 *ports = iface->extra[2];
3172 return 0;
3173 }
3174
3175 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3176 if (iface->endpoint[i].extralen == 3) {
3177 *ports = iface->endpoint[i].extra[2];
3178 return 0;
3179 }
3180 }
3181
3182 return -1;
3183}
3184
3185/* interrupt urb needs to be submitted, used for serial read of muxed port */
3186static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3187 struct usb_device *usb, gfp_t gfp)
3188{
3189 int result;
3190
3191 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3192 usb_rcvintpipe(usb,
3193 shared_int->intr_endp->bEndpointAddress & 0x7F),
3194 shared_int->shared_intr_buf,
3195 1,
3196 intr_callback, shared_int,
3197 shared_int->intr_endp->bInterval);
3198
3199 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3200 if (result)
3201 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3202 result);
3203
3204 return result;
3205}
3206
3207/* operations setup of the serial interface */
3208static const struct tty_operations hso_serial_ops = {
3209 .open = hso_serial_open,
3210 .close = hso_serial_close,
3211 .write = hso_serial_write,
3212 .write_room = hso_serial_write_room,
3213 .cleanup = hso_serial_cleanup,
3214 .ioctl = hso_serial_ioctl,
3215 .set_termios = hso_serial_set_termios,
3216 .chars_in_buffer = hso_serial_chars_in_buffer,
3217 .tiocmget = hso_serial_tiocmget,
3218 .tiocmset = hso_serial_tiocmset,
3219 .get_icount = hso_get_count,
3220 .unthrottle = hso_unthrottle
3221};
3222
3223static struct usb_driver hso_driver = {
3224 .name = driver_name,
3225 .probe = hso_probe,
3226 .disconnect = hso_disconnect,
3227 .id_table = hso_ids,
3228 .suspend = hso_suspend,
3229 .resume = hso_resume,
3230 .reset_resume = hso_resume,
3231 .supports_autosuspend = 1,
3232 .disable_hub_initiated_lpm = 1,
3233};
3234
3235static int __init hso_init(void)
3236{
3237 int i;
3238 int result;
3239
3240 /* put it in the log */
3241 pr_info("%s\n", version);
3242
3243 /* Initialise the serial table semaphore and table */
3244 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3245 serial_table[i] = NULL;
3246
3247 /* allocate our driver using the proper amount of supported minors */
3248 tty_drv = tty_alloc_driver(HSO_SERIAL_TTY_MINORS, TTY_DRIVER_REAL_RAW |
3249 TTY_DRIVER_DYNAMIC_DEV);
3250 if (IS_ERR(tty_drv))
3251 return PTR_ERR(tty_drv);
3252
3253 /* fill in all needed values */
3254 tty_drv->driver_name = driver_name;
3255 tty_drv->name = tty_filename;
3256
3257 /* if major number is provided as parameter, use that one */
3258 if (tty_major)
3259 tty_drv->major = tty_major;
3260
3261 tty_drv->minor_start = 0;
3262 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3263 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3264 tty_drv->init_termios = tty_std_termios;
3265 hso_init_termios(&tty_drv->init_termios);
3266 tty_set_operations(tty_drv, &hso_serial_ops);
3267
3268 /* register the tty driver */
3269 result = tty_register_driver(tty_drv);
3270 if (result) {
3271 pr_err("%s - tty_register_driver failed(%d)\n",
3272 __func__, result);
3273 goto err_free_tty;
3274 }
3275
3276 /* register this module as an usb driver */
3277 result = usb_register(&hso_driver);
3278 if (result) {
3279 pr_err("Could not register hso driver - error: %d\n", result);
3280 goto err_unreg_tty;
3281 }
3282
3283 /* done */
3284 return 0;
3285err_unreg_tty:
3286 tty_unregister_driver(tty_drv);
3287err_free_tty:
3288 tty_driver_kref_put(tty_drv);
3289 return result;
3290}
3291
3292static void __exit hso_exit(void)
3293{
3294 pr_info("unloaded\n");
3295
3296 tty_unregister_driver(tty_drv);
3297 /* deregister the usb driver */
3298 usb_deregister(&hso_driver);
3299 tty_driver_kref_put(tty_drv);
3300}
3301
3302/* Module definitions */
3303module_init(hso_init);
3304module_exit(hso_exit);
3305
3306MODULE_AUTHOR(MOD_AUTHOR);
3307MODULE_DESCRIPTION(MOD_DESCRIPTION);
3308MODULE_LICENSE("GPL");
3309
3310/* change the debug level (eg: insmod hso.ko debug=0x04) */
3311MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3312module_param(debug, int, 0644);
3313
3314/* set the major tty number (eg: insmod hso.ko tty_major=245) */
3315MODULE_PARM_DESC(tty_major, "Set the major tty number");
3316module_param(tty_major, int, 0644);
3317
3318/* disable network interface (eg: insmod hso.ko disable_net=1) */
3319MODULE_PARM_DESC(disable_net, "Disable the network interface");
3320module_param(disable_net, int, 0644);