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ipv6: Update ip-sysctl.txt documentation for recent changes to accept_ra and forwarding
[linux-2.6/libata-dev.git] / drivers / usb / serial / sierra.c
blobd47b56e9e8ce9dc22c423967f2ab73a4f0dd5db1
1 /*
2 USB Driver for Sierra Wireless
3
4 Copyright (C) 2006, 2007, 2008 Kevin Lloyd <klloyd@sierrawireless.com>,
5
6 Copyright (C) 2008, 2009 Elina Pasheva, Matthew Safar, Rory Filer
7 <linux@sierrawireless.com>
8
9 IMPORTANT DISCLAIMER: This driver is not commercially supported by
10 Sierra Wireless. Use at your own risk.
11
12 This driver is free software; you can redistribute it and/or modify
13 it under the terms of Version 2 of the GNU General Public License as
14 published by the Free Software Foundation.
15
16 Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
17 Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
18 */
19 /* Uncomment to log function calls */
20 /* #define DEBUG */
21 #define DRIVER_VERSION "v.1.7.16"
22 #define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer"
23 #define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
24
25 #include <linux/kernel.h>
26 #include <linux/jiffies.h>
27 #include <linux/errno.h>
28 #include <linux/tty.h>
29 #include <linux/slab.h>
30 #include <linux/tty_flip.h>
31 #include <linux/module.h>
32 #include <linux/usb.h>
33 #include <linux/usb/serial.h>
34
35 #define SWIMS_USB_REQUEST_SetPower 0x00
36 #define SWIMS_USB_REQUEST_SetNmea 0x07
37
38 #define N_IN_URB_HM 8
39 #define N_OUT_URB_HM 64
40 #define N_IN_URB 4
41 #define N_OUT_URB 4
42 #define IN_BUFLEN 4096
43
44 #define MAX_TRANSFER (PAGE_SIZE - 512)
45 /* MAX_TRANSFER is chosen so that the VM is not stressed by
46 allocations > PAGE_SIZE and the number of packets in a page
47 is an integer 512 is the largest possible packet on EHCI */
48
49 static int debug;
50 static int nmea;
51
52 /* Used in interface blacklisting */
53 struct sierra_iface_info {
54 const u32 infolen; /* number of interface numbers on blacklist */
55 const u8 *ifaceinfo; /* pointer to the array holding the numbers */
56 };
57
58 struct sierra_intf_private {
59 spinlock_t susp_lock;
60 unsigned int suspended:1;
61 int in_flight;
62 };
63
64 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
65 {
66 int result;
67 dev_dbg(&udev->dev, "%s\n", __func__);
68 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
69 SWIMS_USB_REQUEST_SetPower, /* __u8 request */
70 USB_TYPE_VENDOR, /* __u8 request type */
71 swiState, /* __u16 value */
72 0, /* __u16 index */
73 NULL, /* void *data */
74 0, /* __u16 size */
75 USB_CTRL_SET_TIMEOUT); /* int timeout */
76 return result;
77 }
78
79 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
80 {
81 int result;
82 dev_dbg(&udev->dev, "%s\n", __func__);
83 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
84 SWIMS_USB_REQUEST_SetNmea, /* __u8 request */
85 USB_TYPE_VENDOR, /* __u8 request type */
86 enable, /* __u16 value */
87 0x0000, /* __u16 index */
88 NULL, /* void *data */
89 0, /* __u16 size */
90 USB_CTRL_SET_TIMEOUT); /* int timeout */
91 return result;
92 }
93
94 static int sierra_calc_num_ports(struct usb_serial *serial)
95 {
96 int num_ports = 0;
97 u8 ifnum, numendpoints;
98
99 dev_dbg(&serial->dev->dev, "%s\n", __func__);
100
101 ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
102 numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
103
104 /* Dummy interface present on some SKUs should be ignored */
105 if (ifnum == 0x99)
106 num_ports = 0;
107 else if (numendpoints <= 3)
108 num_ports = 1;
109 else
110 num_ports = (numendpoints-1)/2;
111 return num_ports;
112 }
113
114 static int is_blacklisted(const u8 ifnum,
115 const struct sierra_iface_info *blacklist)
116 {
117 const u8 *info;
118 int i;
119
120 if (blacklist) {
121 info = blacklist->ifaceinfo;
122
123 for (i = 0; i < blacklist->infolen; i++) {
124 if (info[i] == ifnum)
125 return 1;
126 }
127 }
128 return 0;
129 }
130
131 static int is_himemory(const u8 ifnum,
132 const struct sierra_iface_info *himemorylist)
133 {
134 const u8 *info;
135 int i;
136
137 if (himemorylist) {
138 info = himemorylist->ifaceinfo;
139
140 for (i=0; i < himemorylist->infolen; i++) {
141 if (info[i] == ifnum)
142 return 1;
143 }
144 }
145 return 0;
146 }
147
148 static int sierra_calc_interface(struct usb_serial *serial)
149 {
150 int interface;
151 struct usb_interface *p_interface;
152 struct usb_host_interface *p_host_interface;
153 dev_dbg(&serial->dev->dev, "%s\n", __func__);
154
155 /* Get the interface structure pointer from the serial struct */
156 p_interface = serial->interface;
157
158 /* Get a pointer to the host interface structure */
159 p_host_interface = p_interface->cur_altsetting;
160
161 /* read the interface descriptor for this active altsetting
162 * to find out the interface number we are on
163 */
164 interface = p_host_interface->desc.bInterfaceNumber;
165
166 return interface;
167 }
168
169 static int sierra_probe(struct usb_serial *serial,
170 const struct usb_device_id *id)
171 {
172 int result = 0;
173 struct usb_device *udev;
174 struct sierra_intf_private *data;
175 u8 ifnum;
176
177 udev = serial->dev;
178 dev_dbg(&udev->dev, "%s\n", __func__);
179
180 ifnum = sierra_calc_interface(serial);
181 /*
182 * If this interface supports more than 1 alternate
183 * select the 2nd one
184 */
185 if (serial->interface->num_altsetting == 2) {
186 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
187 ifnum);
188 /* We know the alternate setting is 1 for the MC8785 */
189 usb_set_interface(udev, ifnum, 1);
190 }
191
192 /* ifnum could have changed - by calling usb_set_interface */
193 ifnum = sierra_calc_interface(serial);
194
195 if (is_blacklisted(ifnum,
196 (struct sierra_iface_info *)id->driver_info)) {
197 dev_dbg(&serial->dev->dev,
198 "Ignoring blacklisted interface #%d\n", ifnum);
199 return -ENODEV;
200 }
201
202 data = serial->private = kzalloc(sizeof(struct sierra_intf_private), GFP_KERNEL);
203 if (!data)
204 return -ENOMEM;
205 spin_lock_init(&data->susp_lock);
206
207 return result;
208 }
209
210 /* interfaces with higher memory requirements */
211 static const u8 hi_memory_typeA_ifaces[] = { 0, 2 };
212 static const struct sierra_iface_info typeA_interface_list = {
213 .infolen = ARRAY_SIZE(hi_memory_typeA_ifaces),
214 .ifaceinfo = hi_memory_typeA_ifaces,
215 };
216
217 static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 };
218 static const struct sierra_iface_info typeB_interface_list = {
219 .infolen = ARRAY_SIZE(hi_memory_typeB_ifaces),
220 .ifaceinfo = hi_memory_typeB_ifaces,
221 };
222
223 /* 'blacklist' of interfaces not served by this driver */
224 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11 };
225 static const struct sierra_iface_info direct_ip_interface_blacklist = {
226 .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces),
227 .ifaceinfo = direct_ip_non_serial_ifaces,
228 };
229
230 static const struct usb_device_id id_table[] = {
231 { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
232 { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
233 { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */
234 { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
235
236 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
237 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
238 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
239 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
240 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
241 { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
242 { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
243 { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
244 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
245 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
246 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
247 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
248 { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U */
249 /* Sierra Wireless C597 */
250 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
251 /* Sierra Wireless T598 */
252 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
253 { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
254 { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
255 { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
256 { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */
257
258 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
259 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
260 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
261 { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
262 { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
263 { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
264 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
265 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
266 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
267 { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
268 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
269 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
270 { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
271 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
272 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
273 { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
274 { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
275 { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
276 { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
277 { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
278 { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
279 /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
280 { USB_DEVICE(0x1199, 0x683C) },
281 { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
282 /* Sierra Wireless MC8790, MC8791, MC8792 */
283 { USB_DEVICE(0x1199, 0x683E) },
284 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
285 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
286 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
287 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
288 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
289 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
290 { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
291 { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
292 /* Sierra Wireless C885 */
293 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
294 /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
295 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
296 /* Sierra Wireless C22/C33 */
297 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
298 /* Sierra Wireless HSPA Non-Composite Device */
299 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
300 { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
301 { USB_DEVICE(0x1199, 0x68A3), /* Sierra Wireless Direct IP modems */
302 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
303 },
304 { USB_DEVICE(0x413C, 0x08133) }, /* Dell Computer Corp. Wireless 5720 VZW Mobile Broadband (EVDO Rev-A) Minicard GPS Port */
305
306 { }
307 };
308 MODULE_DEVICE_TABLE(usb, id_table);
309
310
311 struct sierra_port_private {
312 spinlock_t lock; /* lock the structure */
313 int outstanding_urbs; /* number of out urbs in flight */
314 struct usb_anchor active;
315 struct usb_anchor delayed;
316
317 int num_out_urbs;
318 int num_in_urbs;
319 /* Input endpoints and buffers for this port */
320 struct urb *in_urbs[N_IN_URB_HM];
321
322 /* Settings for the port */
323 int rts_state; /* Handshaking pins (outputs) */
324 int dtr_state;
325 int cts_state; /* Handshaking pins (inputs) */
326 int dsr_state;
327 int dcd_state;
328 int ri_state;
329 unsigned int opened:1;
330 };
331
332 static int sierra_send_setup(struct usb_serial_port *port)
333 {
334 struct usb_serial *serial = port->serial;
335 struct sierra_port_private *portdata;
336 __u16 interface = 0;
337 int val = 0;
338 int do_send = 0;
339 int retval;
340
341 dev_dbg(&port->dev, "%s\n", __func__);
342
343 portdata = usb_get_serial_port_data(port);
344
345 if (portdata->dtr_state)
346 val |= 0x01;
347 if (portdata->rts_state)
348 val |= 0x02;
349
350 /* If composite device then properly report interface */
351 if (serial->num_ports == 1) {
352 interface = sierra_calc_interface(serial);
353 /* Control message is sent only to interfaces with
354 * interrupt_in endpoints
355 */
356 if (port->interrupt_in_urb) {
357 /* send control message */
358 do_send = 1;
359 }
360 }
361
362 /* Otherwise the need to do non-composite mapping */
363 else {
364 if (port->bulk_out_endpointAddress == 2)
365 interface = 0;
366 else if (port->bulk_out_endpointAddress == 4)
367 interface = 1;
368 else if (port->bulk_out_endpointAddress == 5)
369 interface = 2;
370
371 do_send = 1;
372 }
373 if (!do_send)
374 return 0;
375
376 usb_autopm_get_interface(serial->interface);
377 retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
378 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
379 usb_autopm_put_interface(serial->interface);
380
381 return retval;
382 }
383
384 static void sierra_set_termios(struct tty_struct *tty,
385 struct usb_serial_port *port, struct ktermios *old_termios)
386 {
387 dev_dbg(&port->dev, "%s\n", __func__);
388 tty_termios_copy_hw(tty->termios, old_termios);
389 sierra_send_setup(port);
390 }
391
392 static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
393 {
394 struct usb_serial_port *port = tty->driver_data;
395 unsigned int value;
396 struct sierra_port_private *portdata;
397
398 dev_dbg(&port->dev, "%s\n", __func__);
399 portdata = usb_get_serial_port_data(port);
400
401 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
402 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
403 ((portdata->cts_state) ? TIOCM_CTS : 0) |
404 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
405 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
406 ((portdata->ri_state) ? TIOCM_RNG : 0);
407
408 return value;
409 }
410
411 static int sierra_tiocmset(struct tty_struct *tty, struct file *file,
412 unsigned int set, unsigned int clear)
413 {
414 struct usb_serial_port *port = tty->driver_data;
415 struct sierra_port_private *portdata;
416
417 portdata = usb_get_serial_port_data(port);
418
419 if (set & TIOCM_RTS)
420 portdata->rts_state = 1;
421 if (set & TIOCM_DTR)
422 portdata->dtr_state = 1;
423
424 if (clear & TIOCM_RTS)
425 portdata->rts_state = 0;
426 if (clear & TIOCM_DTR)
427 portdata->dtr_state = 0;
428 return sierra_send_setup(port);
429 }
430
431 static void sierra_release_urb(struct urb *urb)
432 {
433 struct usb_serial_port *port;
434 if (urb) {
435 port = urb->context;
436 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
437 kfree(urb->transfer_buffer);
438 usb_free_urb(urb);
439 }
440 }
441
442 static void sierra_outdat_callback(struct urb *urb)
443 {
444 struct usb_serial_port *port = urb->context;
445 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
446 struct sierra_intf_private *intfdata;
447 int status = urb->status;
448
449 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
450 intfdata = port->serial->private;
451
452 /* free up the transfer buffer, as usb_free_urb() does not do this */
453 kfree(urb->transfer_buffer);
454 usb_autopm_put_interface_async(port->serial->interface);
455 if (status)
456 dev_dbg(&port->dev, "%s - nonzero write bulk status "
457 "received: %d\n", __func__, status);
458
459 spin_lock(&portdata->lock);
460 --portdata->outstanding_urbs;
461 spin_unlock(&portdata->lock);
462 spin_lock(&intfdata->susp_lock);
463 --intfdata->in_flight;
464 spin_unlock(&intfdata->susp_lock);
465
466 usb_serial_port_softint(port);
467 }
468
469 /* Write */
470 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
471 const unsigned char *buf, int count)
472 {
473 struct sierra_port_private *portdata;
474 struct sierra_intf_private *intfdata;
475 struct usb_serial *serial = port->serial;
476 unsigned long flags;
477 unsigned char *buffer;
478 struct urb *urb;
479 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
480 int retval = 0;
481
482 /* verify that we actually have some data to write */
483 if (count == 0)
484 return 0;
485
486 portdata = usb_get_serial_port_data(port);
487 intfdata = serial->private;
488
489 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
490 spin_lock_irqsave(&portdata->lock, flags);
491 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
492 portdata->outstanding_urbs);
493 if (portdata->outstanding_urbs > portdata->num_out_urbs) {
494 spin_unlock_irqrestore(&portdata->lock, flags);
495 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
496 return 0;
497 }
498 portdata->outstanding_urbs++;
499 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
500 portdata->outstanding_urbs);
501 spin_unlock_irqrestore(&portdata->lock, flags);
502
503 retval = usb_autopm_get_interface_async(serial->interface);
504 if (retval < 0) {
505 spin_lock_irqsave(&portdata->lock, flags);
506 portdata->outstanding_urbs--;
507 spin_unlock_irqrestore(&portdata->lock, flags);
508 goto error_simple;
509 }
510
511 buffer = kmalloc(writesize, GFP_ATOMIC);
512 if (!buffer) {
513 dev_err(&port->dev, "out of memory\n");
514 retval = -ENOMEM;
515 goto error_no_buffer;
516 }
517
518 urb = usb_alloc_urb(0, GFP_ATOMIC);
519 if (!urb) {
520 dev_err(&port->dev, "no more free urbs\n");
521 retval = -ENOMEM;
522 goto error_no_urb;
523 }
524
525 memcpy(buffer, buf, writesize);
526
527 usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer);
528
529 usb_fill_bulk_urb(urb, serial->dev,
530 usb_sndbulkpipe(serial->dev,
531 port->bulk_out_endpointAddress),
532 buffer, writesize, sierra_outdat_callback, port);
533
534 /* Handle the need to send a zero length packet */
535 urb->transfer_flags |= URB_ZERO_PACKET;
536
537 spin_lock_irqsave(&intfdata->susp_lock, flags);
538
539 if (intfdata->suspended) {
540 usb_anchor_urb(urb, &portdata->delayed);
541 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
542 goto skip_power;
543 } else {
544 usb_anchor_urb(urb, &portdata->active);
545 }
546 /* send it down the pipe */
547 retval = usb_submit_urb(urb, GFP_ATOMIC);
548 if (retval) {
549 usb_unanchor_urb(urb);
550 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
551 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
552 "with status = %d\n", __func__, retval);
553 goto error;
554 } else {
555 intfdata->in_flight++;
556 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
557 }
558
559 skip_power:
560 /* we are done with this urb, so let the host driver
561 * really free it when it is finished with it */
562 usb_free_urb(urb);
563
564 return writesize;
565 error:
566 usb_free_urb(urb);
567 error_no_urb:
568 kfree(buffer);
569 error_no_buffer:
570 spin_lock_irqsave(&portdata->lock, flags);
571 --portdata->outstanding_urbs;
572 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
573 portdata->outstanding_urbs);
574 spin_unlock_irqrestore(&portdata->lock, flags);
575 usb_autopm_put_interface_async(serial->interface);
576 error_simple:
577 return retval;
578 }
579
580 static void sierra_indat_callback(struct urb *urb)
581 {
582 int err;
583 int endpoint;
584 struct usb_serial_port *port;
585 struct tty_struct *tty;
586 unsigned char *data = urb->transfer_buffer;
587 int status = urb->status;
588
589 endpoint = usb_pipeendpoint(urb->pipe);
590 port = urb->context;
591
592 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
593
594 if (status) {
595 dev_dbg(&port->dev, "%s: nonzero status: %d on"
596 " endpoint %02x\n", __func__, status, endpoint);
597 } else {
598 if (urb->actual_length) {
599 tty = tty_port_tty_get(&port->port);
600 if (tty) {
601 tty_insert_flip_string(tty, data,
602 urb->actual_length);
603 tty_flip_buffer_push(tty);
604
605 tty_kref_put(tty);
606 usb_serial_debug_data(debug, &port->dev,
607 __func__, urb->actual_length, data);
608 }
609 } else {
610 dev_dbg(&port->dev, "%s: empty read urb"
611 " received\n", __func__);
612 }
613 }
614
615 /* Resubmit urb so we continue receiving */
616 if (status != -ESHUTDOWN && status != -EPERM) {
617 usb_mark_last_busy(port->serial->dev);
618 err = usb_submit_urb(urb, GFP_ATOMIC);
619 if (err && err != -EPERM)
620 dev_err(&port->dev, "resubmit read urb failed."
621 "(%d)\n", err);
622 }
623
624 return;
625 }
626
627 static void sierra_instat_callback(struct urb *urb)
628 {
629 int err;
630 int status = urb->status;
631 struct usb_serial_port *port = urb->context;
632 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
633 struct usb_serial *serial = port->serial;
634
635 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
636 urb, port, portdata);
637
638 if (status == 0) {
639 struct usb_ctrlrequest *req_pkt =
640 (struct usb_ctrlrequest *)urb->transfer_buffer;
641
642 if (!req_pkt) {
643 dev_dbg(&port->dev, "%s: NULL req_pkt\n",
644 __func__);
645 return;
646 }
647 if ((req_pkt->bRequestType == 0xA1) &&
648 (req_pkt->bRequest == 0x20)) {
649 int old_dcd_state;
650 unsigned char signals = *((unsigned char *)
651 urb->transfer_buffer +
652 sizeof(struct usb_ctrlrequest));
653 struct tty_struct *tty;
654
655 dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
656 signals);
657
658 old_dcd_state = portdata->dcd_state;
659 portdata->cts_state = 1;
660 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
661 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
662 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
663
664 tty = tty_port_tty_get(&port->port);
665 if (tty && !C_CLOCAL(tty) &&
666 old_dcd_state && !portdata->dcd_state)
667 tty_hangup(tty);
668 tty_kref_put(tty);
669 } else {
670 dev_dbg(&port->dev, "%s: type %x req %x\n",
671 __func__, req_pkt->bRequestType,
672 req_pkt->bRequest);
673 }
674 } else
675 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
676
677 /* Resubmit urb so we continue receiving IRQ data */
678 if (status != -ESHUTDOWN && status != -ENOENT) {
679 usb_mark_last_busy(serial->dev);
680 urb->dev = serial->dev;
681 err = usb_submit_urb(urb, GFP_ATOMIC);
682 if (err && err != -EPERM)
683 dev_err(&port->dev, "%s: resubmit intr urb "
684 "failed. (%d)\n", __func__, err);
685 }
686 }
687
688 static int sierra_write_room(struct tty_struct *tty)
689 {
690 struct usb_serial_port *port = tty->driver_data;
691 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
692 unsigned long flags;
693
694 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
695
696 /* try to give a good number back based on if we have any free urbs at
697 * this point in time */
698 spin_lock_irqsave(&portdata->lock, flags);
699 if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) {
700 spin_unlock_irqrestore(&portdata->lock, flags);
701 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
702 return 0;
703 }
704 spin_unlock_irqrestore(&portdata->lock, flags);
705
706 return 2048;
707 }
708
709 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
710 {
711 int i;
712 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
713
714 for (i = 0; i < portdata->num_in_urbs; i++)
715 usb_kill_urb(portdata->in_urbs[i]);
716
717 usb_kill_urb(port->interrupt_in_urb);
718 }
719
720 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
721 {
722 int ok_cnt;
723 int err = -EINVAL;
724 int i;
725 struct urb *urb;
726 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
727
728 ok_cnt = 0;
729 for (i = 0; i < portdata->num_in_urbs; i++) {
730 urb = portdata->in_urbs[i];
731 if (!urb)
732 continue;
733 err = usb_submit_urb(urb, mem_flags);
734 if (err) {
735 dev_err(&port->dev, "%s: submit urb failed: %d\n",
736 __func__, err);
737 } else {
738 ok_cnt++;
739 }
740 }
741
742 if (ok_cnt && port->interrupt_in_urb) {
743 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
744 if (err) {
745 dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
746 __func__, err);
747 }
748 }
749
750 if (ok_cnt > 0) /* at least one rx urb submitted */
751 return 0;
752 else
753 return err;
754 }
755
756 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
757 int dir, void *ctx, int len,
758 gfp_t mem_flags,
759 usb_complete_t callback)
760 {
761 struct urb *urb;
762 u8 *buf;
763
764 if (endpoint == -1)
765 return NULL;
766
767 urb = usb_alloc_urb(0, mem_flags);
768 if (urb == NULL) {
769 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
770 __func__, endpoint);
771 return NULL;
772 }
773
774 buf = kmalloc(len, mem_flags);
775 if (buf) {
776 /* Fill URB using supplied data */
777 usb_fill_bulk_urb(urb, serial->dev,
778 usb_sndbulkpipe(serial->dev, endpoint) | dir,
779 buf, len, callback, ctx);
780
781 /* debug */
782 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
783 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
784 } else {
785 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
786 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
787
788 sierra_release_urb(urb);
789 urb = NULL;
790 }
791
792 return urb;
793 }
794
795 static void sierra_close(struct usb_serial_port *port)
796 {
797 int i;
798 struct usb_serial *serial = port->serial;
799 struct sierra_port_private *portdata;
800 struct sierra_intf_private *intfdata = port->serial->private;
801
802
803 dev_dbg(&port->dev, "%s\n", __func__);
804 portdata = usb_get_serial_port_data(port);
805
806 portdata->rts_state = 0;
807 portdata->dtr_state = 0;
808
809 if (serial->dev) {
810 mutex_lock(&serial->disc_mutex);
811 if (!serial->disconnected) {
812 serial->interface->needs_remote_wakeup = 0;
813 usb_autopm_get_interface(serial->interface);
814 sierra_send_setup(port);
815 }
816 mutex_unlock(&serial->disc_mutex);
817 spin_lock_irq(&intfdata->susp_lock);
818 portdata->opened = 0;
819 spin_unlock_irq(&intfdata->susp_lock);
820
821
822 /* Stop reading urbs */
823 sierra_stop_rx_urbs(port);
824 /* .. and release them */
825 for (i = 0; i < portdata->num_in_urbs; i++) {
826 sierra_release_urb(portdata->in_urbs[i]);
827 portdata->in_urbs[i] = NULL;
828 }
829 }
830 }
831
832 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
833 {
834 struct sierra_port_private *portdata;
835 struct usb_serial *serial = port->serial;
836 struct sierra_intf_private *intfdata = serial->private;
837 int i;
838 int err;
839 int endpoint;
840 struct urb *urb;
841
842 portdata = usb_get_serial_port_data(port);
843
844 dev_dbg(&port->dev, "%s\n", __func__);
845
846 /* Set some sane defaults */
847 portdata->rts_state = 1;
848 portdata->dtr_state = 1;
849
850
851 endpoint = port->bulk_in_endpointAddress;
852 for (i = 0; i < portdata->num_in_urbs; i++) {
853 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
854 IN_BUFLEN, GFP_KERNEL,
855 sierra_indat_callback);
856 portdata->in_urbs[i] = urb;
857 }
858 /* clear halt condition */
859 usb_clear_halt(serial->dev,
860 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
861
862 err = sierra_submit_rx_urbs(port, GFP_KERNEL);
863 if (err) {
864 /* get rid of everything as in close */
865 sierra_close(port);
866 /* restore balance for autopm */
867 usb_autopm_put_interface(serial->interface);
868 return err;
869 }
870 sierra_send_setup(port);
871
872 serial->interface->needs_remote_wakeup = 1;
873 spin_lock_irq(&intfdata->susp_lock);
874 portdata->opened = 1;
875 spin_unlock_irq(&intfdata->susp_lock);
876 usb_autopm_put_interface(serial->interface);
877
878 return 0;
879 }
880
881
882 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
883 {
884 struct usb_serial *serial = port->serial;
885 struct sierra_port_private *portdata;
886
887 portdata = usb_get_serial_port_data(port);
888 portdata->rts_state = on;
889 portdata->dtr_state = on;
890
891 if (serial->dev) {
892 mutex_lock(&serial->disc_mutex);
893 if (!serial->disconnected)
894 sierra_send_setup(port);
895 mutex_unlock(&serial->disc_mutex);
896 }
897 }
898
899 static int sierra_startup(struct usb_serial *serial)
900 {
901 struct usb_serial_port *port;
902 struct sierra_port_private *portdata;
903 struct sierra_iface_info *himemoryp = NULL;
904 int i;
905 u8 ifnum;
906
907 dev_dbg(&serial->dev->dev, "%s\n", __func__);
908
909 /* Set Device mode to D0 */
910 sierra_set_power_state(serial->dev, 0x0000);
911
912 /* Check NMEA and set */
913 if (nmea)
914 sierra_vsc_set_nmea(serial->dev, 1);
915
916 /* Now setup per port private data */
917 for (i = 0; i < serial->num_ports; i++) {
918 port = serial->port[i];
919 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
920 if (!portdata) {
921 dev_dbg(&port->dev, "%s: kmalloc for "
922 "sierra_port_private (%d) failed!\n",
923 __func__, i);
924 return -ENOMEM;
925 }
926 spin_lock_init(&portdata->lock);
927 init_usb_anchor(&portdata->active);
928 init_usb_anchor(&portdata->delayed);
929 ifnum = i;
930 /* Assume low memory requirements */
931 portdata->num_out_urbs = N_OUT_URB;
932 portdata->num_in_urbs = N_IN_URB;
933
934 /* Determine actual memory requirements */
935 if (serial->num_ports == 1) {
936 /* Get interface number for composite device */
937 ifnum = sierra_calc_interface(serial);
938 himemoryp =
939 (struct sierra_iface_info *)&typeB_interface_list;
940 if (is_himemory(ifnum, himemoryp)) {
941 portdata->num_out_urbs = N_OUT_URB_HM;
942 portdata->num_in_urbs = N_IN_URB_HM;
943 }
944 }
945 else {
946 himemoryp =
947 (struct sierra_iface_info *)&typeA_interface_list;
948 if (is_himemory(i, himemoryp)) {
949 portdata->num_out_urbs = N_OUT_URB_HM;
950 portdata->num_in_urbs = N_IN_URB_HM;
951 }
952 }
953 dev_dbg(&serial->dev->dev,
954 "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
955 ifnum,portdata->num_in_urbs, portdata->num_out_urbs );
956 /* Set the port private data pointer */
957 usb_set_serial_port_data(port, portdata);
958 }
959
960 return 0;
961 }
962
963 static void sierra_release(struct usb_serial *serial)
964 {
965 int i;
966 struct usb_serial_port *port;
967 struct sierra_port_private *portdata;
968
969 dev_dbg(&serial->dev->dev, "%s\n", __func__);
970
971 for (i = 0; i < serial->num_ports; ++i) {
972 port = serial->port[i];
973 if (!port)
974 continue;
975 portdata = usb_get_serial_port_data(port);
976 if (!portdata)
977 continue;
978 kfree(portdata);
979 }
980 }
981
982 #ifdef CONFIG_PM
983 static void stop_read_write_urbs(struct usb_serial *serial)
984 {
985 int i;
986 struct usb_serial_port *port;
987 struct sierra_port_private *portdata;
988
989 /* Stop reading/writing urbs */
990 for (i = 0; i < serial->num_ports; ++i) {
991 port = serial->port[i];
992 portdata = usb_get_serial_port_data(port);
993 sierra_stop_rx_urbs(port);
994 usb_kill_anchored_urbs(&portdata->active);
995 }
996 }
997
998 static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
999 {
1000 struct sierra_intf_private *intfdata;
1001 int b;
1002
1003 if (message.event & PM_EVENT_AUTO) {
1004 intfdata = serial->private;
1005 spin_lock_irq(&intfdata->susp_lock);
1006 b = intfdata->in_flight;
1007
1008 if (b) {
1009 spin_unlock_irq(&intfdata->susp_lock);
1010 return -EBUSY;
1011 } else {
1012 intfdata->suspended = 1;
1013 spin_unlock_irq(&intfdata->susp_lock);
1014 }
1015 }
1016 stop_read_write_urbs(serial);
1017
1018 return 0;
1019 }
1020
1021 static int sierra_resume(struct usb_serial *serial)
1022 {
1023 struct usb_serial_port *port;
1024 struct sierra_intf_private *intfdata = serial->private;
1025 struct sierra_port_private *portdata;
1026 struct urb *urb;
1027 int ec = 0;
1028 int i, err;
1029
1030 spin_lock_irq(&intfdata->susp_lock);
1031 for (i = 0; i < serial->num_ports; i++) {
1032 port = serial->port[i];
1033 portdata = usb_get_serial_port_data(port);
1034
1035 while ((urb = usb_get_from_anchor(&portdata->delayed))) {
1036 usb_anchor_urb(urb, &portdata->active);
1037 intfdata->in_flight++;
1038 err = usb_submit_urb(urb, GFP_ATOMIC);
1039 if (err < 0) {
1040 intfdata->in_flight--;
1041 usb_unanchor_urb(urb);
1042 usb_scuttle_anchored_urbs(&portdata->delayed);
1043 break;
1044 }
1045 }
1046
1047 if (portdata->opened) {
1048 err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1049 if (err)
1050 ec++;
1051 }
1052 }
1053 intfdata->suspended = 0;
1054 spin_unlock_irq(&intfdata->susp_lock);
1055
1056 return ec ? -EIO : 0;
1057 }
1058
1059 static int sierra_reset_resume(struct usb_interface *intf)
1060 {
1061 struct usb_serial *serial = usb_get_intfdata(intf);
1062 dev_err(&serial->dev->dev, "%s\n", __func__);
1063 return usb_serial_resume(intf);
1064 }
1065 #else
1066 #define sierra_suspend NULL
1067 #define sierra_resume NULL
1068 #define sierra_reset_resume NULL
1069 #endif
1070
1071 static struct usb_driver sierra_driver = {
1072 .name = "sierra",
1073 .probe = usb_serial_probe,
1074 .disconnect = usb_serial_disconnect,
1075 .suspend = usb_serial_suspend,
1076 .resume = usb_serial_resume,
1077 .reset_resume = sierra_reset_resume,
1078 .id_table = id_table,
1079 .no_dynamic_id = 1,
1080 .supports_autosuspend = 1,
1081 };
1082
1083 static struct usb_serial_driver sierra_device = {
1084 .driver = {
1085 .owner = THIS_MODULE,
1086 .name = "sierra",
1087 },
1088 .description = "Sierra USB modem",
1089 .id_table = id_table,
1090 .usb_driver = &sierra_driver,
1091 .calc_num_ports = sierra_calc_num_ports,
1092 .probe = sierra_probe,
1093 .open = sierra_open,
1094 .close = sierra_close,
1095 .dtr_rts = sierra_dtr_rts,
1096 .write = sierra_write,
1097 .write_room = sierra_write_room,
1098 .set_termios = sierra_set_termios,
1099 .tiocmget = sierra_tiocmget,
1100 .tiocmset = sierra_tiocmset,
1101 .attach = sierra_startup,
1102 .release = sierra_release,
1103 .suspend = sierra_suspend,
1104 .resume = sierra_resume,
1105 .read_int_callback = sierra_instat_callback,
1106 };
1107
1108 /* Functions used by new usb-serial code. */
1109 static int __init sierra_init(void)
1110 {
1111 int retval;
1112 retval = usb_serial_register(&sierra_device);
1113 if (retval)
1114 goto failed_device_register;
1115
1116
1117 retval = usb_register(&sierra_driver);
1118 if (retval)
1119 goto failed_driver_register;
1120
1121 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1122 DRIVER_DESC "\n");
1123
1124 return 0;
1125
1126 failed_driver_register:
1127 usb_serial_deregister(&sierra_device);
1128 failed_device_register:
1129 return retval;
1130 }
1131
1132 static void __exit sierra_exit(void)
1133 {
1134 usb_deregister(&sierra_driver);
1135 usb_serial_deregister(&sierra_device);
1136 }
1137
1138 module_init(sierra_init);
1139 module_exit(sierra_exit);
1140
1141 MODULE_AUTHOR(DRIVER_AUTHOR);
1142 MODULE_DESCRIPTION(DRIVER_DESC);
1143 MODULE_VERSION(DRIVER_VERSION);
1144 MODULE_LICENSE("GPL");
1145
1146 module_param(nmea, bool, S_IRUGO | S_IWUSR);
1147 MODULE_PARM_DESC(nmea, "NMEA streaming");
1148
1149 module_param(debug, bool, S_IRUGO | S_IWUSR);
1150 MODULE_PARM_DESC(debug, "Debug messages");
Linux 2.6 libata-dev (mirror)