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Btrfs: stop the readahead threads on failed mount
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / usb / serial / sierra.c
blobd5d136a53b61a52ca50cb2dd33fa983009b53b37
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(0x0f3d, 0x68A3), /* Airprime/Sierra Wireless Direct IP modems */
305 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
306 },
307 { USB_DEVICE(0x413C, 0x08133) }, /* Dell Computer Corp. Wireless 5720 VZW Mobile Broadband (EVDO Rev-A) Minicard GPS Port */
308
309 { }
310 };
311 MODULE_DEVICE_TABLE(usb, id_table);
312
313
314 struct sierra_port_private {
315 spinlock_t lock; /* lock the structure */
316 int outstanding_urbs; /* number of out urbs in flight */
317 struct usb_anchor active;
318 struct usb_anchor delayed;
319
320 int num_out_urbs;
321 int num_in_urbs;
322 /* Input endpoints and buffers for this port */
323 struct urb *in_urbs[N_IN_URB_HM];
324
325 /* Settings for the port */
326 int rts_state; /* Handshaking pins (outputs) */
327 int dtr_state;
328 int cts_state; /* Handshaking pins (inputs) */
329 int dsr_state;
330 int dcd_state;
331 int ri_state;
332 unsigned int opened:1;
333 };
334
335 static int sierra_send_setup(struct usb_serial_port *port)
336 {
337 struct usb_serial *serial = port->serial;
338 struct sierra_port_private *portdata;
339 __u16 interface = 0;
340 int val = 0;
341 int do_send = 0;
342 int retval;
343
344 dev_dbg(&port->dev, "%s\n", __func__);
345
346 portdata = usb_get_serial_port_data(port);
347
348 if (portdata->dtr_state)
349 val |= 0x01;
350 if (portdata->rts_state)
351 val |= 0x02;
352
353 /* If composite device then properly report interface */
354 if (serial->num_ports == 1) {
355 interface = sierra_calc_interface(serial);
356 /* Control message is sent only to interfaces with
357 * interrupt_in endpoints
358 */
359 if (port->interrupt_in_urb) {
360 /* send control message */
361 do_send = 1;
362 }
363 }
364
365 /* Otherwise the need to do non-composite mapping */
366 else {
367 if (port->bulk_out_endpointAddress == 2)
368 interface = 0;
369 else if (port->bulk_out_endpointAddress == 4)
370 interface = 1;
371 else if (port->bulk_out_endpointAddress == 5)
372 interface = 2;
373
374 do_send = 1;
375 }
376 if (!do_send)
377 return 0;
378
379 retval = usb_autopm_get_interface(serial->interface);
380 if (retval < 0)
381 return retval;
382
383 retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
384 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
385 usb_autopm_put_interface(serial->interface);
386
387 return retval;
388 }
389
390 static void sierra_set_termios(struct tty_struct *tty,
391 struct usb_serial_port *port, struct ktermios *old_termios)
392 {
393 dev_dbg(&port->dev, "%s\n", __func__);
394 tty_termios_copy_hw(tty->termios, old_termios);
395 sierra_send_setup(port);
396 }
397
398 static int sierra_tiocmget(struct tty_struct *tty)
399 {
400 struct usb_serial_port *port = tty->driver_data;
401 unsigned int value;
402 struct sierra_port_private *portdata;
403
404 dev_dbg(&port->dev, "%s\n", __func__);
405 portdata = usb_get_serial_port_data(port);
406
407 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
408 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
409 ((portdata->cts_state) ? TIOCM_CTS : 0) |
410 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
411 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
412 ((portdata->ri_state) ? TIOCM_RNG : 0);
413
414 return value;
415 }
416
417 static int sierra_tiocmset(struct tty_struct *tty,
418 unsigned int set, unsigned int clear)
419 {
420 struct usb_serial_port *port = tty->driver_data;
421 struct sierra_port_private *portdata;
422
423 portdata = usb_get_serial_port_data(port);
424
425 if (set & TIOCM_RTS)
426 portdata->rts_state = 1;
427 if (set & TIOCM_DTR)
428 portdata->dtr_state = 1;
429
430 if (clear & TIOCM_RTS)
431 portdata->rts_state = 0;
432 if (clear & TIOCM_DTR)
433 portdata->dtr_state = 0;
434 return sierra_send_setup(port);
435 }
436
437 static void sierra_release_urb(struct urb *urb)
438 {
439 struct usb_serial_port *port;
440 if (urb) {
441 port = urb->context;
442 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
443 kfree(urb->transfer_buffer);
444 usb_free_urb(urb);
445 }
446 }
447
448 static void sierra_outdat_callback(struct urb *urb)
449 {
450 struct usb_serial_port *port = urb->context;
451 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
452 struct sierra_intf_private *intfdata;
453 int status = urb->status;
454
455 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
456 intfdata = port->serial->private;
457
458 /* free up the transfer buffer, as usb_free_urb() does not do this */
459 kfree(urb->transfer_buffer);
460 usb_autopm_put_interface_async(port->serial->interface);
461 if (status)
462 dev_dbg(&port->dev, "%s - nonzero write bulk status "
463 "received: %d\n", __func__, status);
464
465 spin_lock(&portdata->lock);
466 --portdata->outstanding_urbs;
467 spin_unlock(&portdata->lock);
468 spin_lock(&intfdata->susp_lock);
469 --intfdata->in_flight;
470 spin_unlock(&intfdata->susp_lock);
471
472 usb_serial_port_softint(port);
473 }
474
475 /* Write */
476 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
477 const unsigned char *buf, int count)
478 {
479 struct sierra_port_private *portdata;
480 struct sierra_intf_private *intfdata;
481 struct usb_serial *serial = port->serial;
482 unsigned long flags;
483 unsigned char *buffer;
484 struct urb *urb;
485 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
486 int retval = 0;
487
488 /* verify that we actually have some data to write */
489 if (count == 0)
490 return 0;
491
492 portdata = usb_get_serial_port_data(port);
493 intfdata = serial->private;
494
495 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
496 spin_lock_irqsave(&portdata->lock, flags);
497 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
498 portdata->outstanding_urbs);
499 if (portdata->outstanding_urbs > portdata->num_out_urbs) {
500 spin_unlock_irqrestore(&portdata->lock, flags);
501 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
502 return 0;
503 }
504 portdata->outstanding_urbs++;
505 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
506 portdata->outstanding_urbs);
507 spin_unlock_irqrestore(&portdata->lock, flags);
508
509 retval = usb_autopm_get_interface_async(serial->interface);
510 if (retval < 0) {
511 spin_lock_irqsave(&portdata->lock, flags);
512 portdata->outstanding_urbs--;
513 spin_unlock_irqrestore(&portdata->lock, flags);
514 goto error_simple;
515 }
516
517 buffer = kmalloc(writesize, GFP_ATOMIC);
518 if (!buffer) {
519 dev_err(&port->dev, "out of memory\n");
520 retval = -ENOMEM;
521 goto error_no_buffer;
522 }
523
524 urb = usb_alloc_urb(0, GFP_ATOMIC);
525 if (!urb) {
526 dev_err(&port->dev, "no more free urbs\n");
527 retval = -ENOMEM;
528 goto error_no_urb;
529 }
530
531 memcpy(buffer, buf, writesize);
532
533 usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer);
534
535 usb_fill_bulk_urb(urb, serial->dev,
536 usb_sndbulkpipe(serial->dev,
537 port->bulk_out_endpointAddress),
538 buffer, writesize, sierra_outdat_callback, port);
539
540 /* Handle the need to send a zero length packet */
541 urb->transfer_flags |= URB_ZERO_PACKET;
542
543 spin_lock_irqsave(&intfdata->susp_lock, flags);
544
545 if (intfdata->suspended) {
546 usb_anchor_urb(urb, &portdata->delayed);
547 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
548 goto skip_power;
549 } else {
550 usb_anchor_urb(urb, &portdata->active);
551 }
552 /* send it down the pipe */
553 retval = usb_submit_urb(urb, GFP_ATOMIC);
554 if (retval) {
555 usb_unanchor_urb(urb);
556 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
557 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
558 "with status = %d\n", __func__, retval);
559 goto error;
560 } else {
561 intfdata->in_flight++;
562 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
563 }
564
565 skip_power:
566 /* we are done with this urb, so let the host driver
567 * really free it when it is finished with it */
568 usb_free_urb(urb);
569
570 return writesize;
571 error:
572 usb_free_urb(urb);
573 error_no_urb:
574 kfree(buffer);
575 error_no_buffer:
576 spin_lock_irqsave(&portdata->lock, flags);
577 --portdata->outstanding_urbs;
578 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
579 portdata->outstanding_urbs);
580 spin_unlock_irqrestore(&portdata->lock, flags);
581 usb_autopm_put_interface_async(serial->interface);
582 error_simple:
583 return retval;
584 }
585
586 static void sierra_indat_callback(struct urb *urb)
587 {
588 int err;
589 int endpoint;
590 struct usb_serial_port *port;
591 struct tty_struct *tty;
592 unsigned char *data = urb->transfer_buffer;
593 int status = urb->status;
594
595 endpoint = usb_pipeendpoint(urb->pipe);
596 port = urb->context;
597
598 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
599
600 if (status) {
601 dev_dbg(&port->dev, "%s: nonzero status: %d on"
602 " endpoint %02x\n", __func__, status, endpoint);
603 } else {
604 if (urb->actual_length) {
605 tty = tty_port_tty_get(&port->port);
606 if (tty) {
607 tty_insert_flip_string(tty, data,
608 urb->actual_length);
609 tty_flip_buffer_push(tty);
610
611 tty_kref_put(tty);
612 usb_serial_debug_data(debug, &port->dev,
613 __func__, urb->actual_length, data);
614 }
615 } else {
616 dev_dbg(&port->dev, "%s: empty read urb"
617 " received\n", __func__);
618 }
619 }
620
621 /* Resubmit urb so we continue receiving */
622 if (status != -ESHUTDOWN && status != -EPERM) {
623 usb_mark_last_busy(port->serial->dev);
624 err = usb_submit_urb(urb, GFP_ATOMIC);
625 if (err && err != -EPERM)
626 dev_err(&port->dev, "resubmit read urb failed."
627 "(%d)\n", err);
628 }
629 }
630
631 static void sierra_instat_callback(struct urb *urb)
632 {
633 int err;
634 int status = urb->status;
635 struct usb_serial_port *port = urb->context;
636 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
637 struct usb_serial *serial = port->serial;
638
639 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
640 urb, port, portdata);
641
642 if (status == 0) {
643 struct usb_ctrlrequest *req_pkt =
644 (struct usb_ctrlrequest *)urb->transfer_buffer;
645
646 if (!req_pkt) {
647 dev_dbg(&port->dev, "%s: NULL req_pkt\n",
648 __func__);
649 return;
650 }
651 if ((req_pkt->bRequestType == 0xA1) &&
652 (req_pkt->bRequest == 0x20)) {
653 int old_dcd_state;
654 unsigned char signals = *((unsigned char *)
655 urb->transfer_buffer +
656 sizeof(struct usb_ctrlrequest));
657 struct tty_struct *tty;
658
659 dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
660 signals);
661
662 old_dcd_state = portdata->dcd_state;
663 portdata->cts_state = 1;
664 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
665 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
666 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
667
668 tty = tty_port_tty_get(&port->port);
669 if (tty && !C_CLOCAL(tty) &&
670 old_dcd_state && !portdata->dcd_state)
671 tty_hangup(tty);
672 tty_kref_put(tty);
673 } else {
674 dev_dbg(&port->dev, "%s: type %x req %x\n",
675 __func__, req_pkt->bRequestType,
676 req_pkt->bRequest);
677 }
678 } else
679 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
680
681 /* Resubmit urb so we continue receiving IRQ data */
682 if (status != -ESHUTDOWN && status != -ENOENT) {
683 usb_mark_last_busy(serial->dev);
684 urb->dev = serial->dev;
685 err = usb_submit_urb(urb, GFP_ATOMIC);
686 if (err && err != -EPERM)
687 dev_err(&port->dev, "%s: resubmit intr urb "
688 "failed. (%d)\n", __func__, err);
689 }
690 }
691
692 static int sierra_write_room(struct tty_struct *tty)
693 {
694 struct usb_serial_port *port = tty->driver_data;
695 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
696 unsigned long flags;
697
698 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
699
700 /* try to give a good number back based on if we have any free urbs at
701 * this point in time */
702 spin_lock_irqsave(&portdata->lock, flags);
703 if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) {
704 spin_unlock_irqrestore(&portdata->lock, flags);
705 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
706 return 0;
707 }
708 spin_unlock_irqrestore(&portdata->lock, flags);
709
710 return 2048;
711 }
712
713 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
714 {
715 int i;
716 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
717
718 for (i = 0; i < portdata->num_in_urbs; i++)
719 usb_kill_urb(portdata->in_urbs[i]);
720
721 usb_kill_urb(port->interrupt_in_urb);
722 }
723
724 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
725 {
726 int ok_cnt;
727 int err = -EINVAL;
728 int i;
729 struct urb *urb;
730 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
731
732 ok_cnt = 0;
733 for (i = 0; i < portdata->num_in_urbs; i++) {
734 urb = portdata->in_urbs[i];
735 if (!urb)
736 continue;
737 err = usb_submit_urb(urb, mem_flags);
738 if (err) {
739 dev_err(&port->dev, "%s: submit urb failed: %d\n",
740 __func__, err);
741 } else {
742 ok_cnt++;
743 }
744 }
745
746 if (ok_cnt && port->interrupt_in_urb) {
747 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
748 if (err) {
749 dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
750 __func__, err);
751 }
752 }
753
754 if (ok_cnt > 0) /* at least one rx urb submitted */
755 return 0;
756 else
757 return err;
758 }
759
760 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
761 int dir, void *ctx, int len,
762 gfp_t mem_flags,
763 usb_complete_t callback)
764 {
765 struct urb *urb;
766 u8 *buf;
767
768 if (endpoint == -1)
769 return NULL;
770
771 urb = usb_alloc_urb(0, mem_flags);
772 if (urb == NULL) {
773 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
774 __func__, endpoint);
775 return NULL;
776 }
777
778 buf = kmalloc(len, mem_flags);
779 if (buf) {
780 /* Fill URB using supplied data */
781 usb_fill_bulk_urb(urb, serial->dev,
782 usb_sndbulkpipe(serial->dev, endpoint) | dir,
783 buf, len, callback, ctx);
784
785 /* debug */
786 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
787 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
788 } else {
789 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
790 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
791
792 sierra_release_urb(urb);
793 urb = NULL;
794 }
795
796 return urb;
797 }
798
799 static void sierra_close(struct usb_serial_port *port)
800 {
801 int i;
802 struct usb_serial *serial = port->serial;
803 struct sierra_port_private *portdata;
804 struct sierra_intf_private *intfdata = port->serial->private;
805
806
807 dev_dbg(&port->dev, "%s\n", __func__);
808 portdata = usb_get_serial_port_data(port);
809
810 portdata->rts_state = 0;
811 portdata->dtr_state = 0;
812
813 if (serial->dev) {
814 mutex_lock(&serial->disc_mutex);
815 if (!serial->disconnected) {
816 serial->interface->needs_remote_wakeup = 0;
817 /* odd error handling due to pm counters */
818 if (!usb_autopm_get_interface(serial->interface))
819 sierra_send_setup(port);
820 else
821 usb_autopm_get_interface_no_resume(serial->interface);
822
823 }
824 mutex_unlock(&serial->disc_mutex);
825 spin_lock_irq(&intfdata->susp_lock);
826 portdata->opened = 0;
827 spin_unlock_irq(&intfdata->susp_lock);
828
829
830 /* Stop reading urbs */
831 sierra_stop_rx_urbs(port);
832 /* .. and release them */
833 for (i = 0; i < portdata->num_in_urbs; i++) {
834 sierra_release_urb(portdata->in_urbs[i]);
835 portdata->in_urbs[i] = NULL;
836 }
837 }
838 }
839
840 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
841 {
842 struct sierra_port_private *portdata;
843 struct usb_serial *serial = port->serial;
844 struct sierra_intf_private *intfdata = serial->private;
845 int i;
846 int err;
847 int endpoint;
848 struct urb *urb;
849
850 portdata = usb_get_serial_port_data(port);
851
852 dev_dbg(&port->dev, "%s\n", __func__);
853
854 /* Set some sane defaults */
855 portdata->rts_state = 1;
856 portdata->dtr_state = 1;
857
858
859 endpoint = port->bulk_in_endpointAddress;
860 for (i = 0; i < portdata->num_in_urbs; i++) {
861 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
862 IN_BUFLEN, GFP_KERNEL,
863 sierra_indat_callback);
864 portdata->in_urbs[i] = urb;
865 }
866 /* clear halt condition */
867 usb_clear_halt(serial->dev,
868 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
869
870 err = sierra_submit_rx_urbs(port, GFP_KERNEL);
871 if (err) {
872 /* get rid of everything as in close */
873 sierra_close(port);
874 /* restore balance for autopm */
875 if (!serial->disconnected)
876 usb_autopm_put_interface(serial->interface);
877 return err;
878 }
879 sierra_send_setup(port);
880
881 serial->interface->needs_remote_wakeup = 1;
882 spin_lock_irq(&intfdata->susp_lock);
883 portdata->opened = 1;
884 spin_unlock_irq(&intfdata->susp_lock);
885 usb_autopm_put_interface(serial->interface);
886
887 return 0;
888 }
889
890
891 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
892 {
893 struct usb_serial *serial = port->serial;
894 struct sierra_port_private *portdata;
895
896 portdata = usb_get_serial_port_data(port);
897 portdata->rts_state = on;
898 portdata->dtr_state = on;
899
900 if (serial->dev) {
901 mutex_lock(&serial->disc_mutex);
902 if (!serial->disconnected)
903 sierra_send_setup(port);
904 mutex_unlock(&serial->disc_mutex);
905 }
906 }
907
908 static int sierra_startup(struct usb_serial *serial)
909 {
910 struct usb_serial_port *port;
911 struct sierra_port_private *portdata;
912 struct sierra_iface_info *himemoryp = NULL;
913 int i;
914 u8 ifnum;
915
916 dev_dbg(&serial->dev->dev, "%s\n", __func__);
917
918 /* Set Device mode to D0 */
919 sierra_set_power_state(serial->dev, 0x0000);
920
921 /* Check NMEA and set */
922 if (nmea)
923 sierra_vsc_set_nmea(serial->dev, 1);
924
925 /* Now setup per port private data */
926 for (i = 0; i < serial->num_ports; i++) {
927 port = serial->port[i];
928 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
929 if (!portdata) {
930 dev_dbg(&port->dev, "%s: kmalloc for "
931 "sierra_port_private (%d) failed!\n",
932 __func__, i);
933 return -ENOMEM;
934 }
935 spin_lock_init(&portdata->lock);
936 init_usb_anchor(&portdata->active);
937 init_usb_anchor(&portdata->delayed);
938 ifnum = i;
939 /* Assume low memory requirements */
940 portdata->num_out_urbs = N_OUT_URB;
941 portdata->num_in_urbs = N_IN_URB;
942
943 /* Determine actual memory requirements */
944 if (serial->num_ports == 1) {
945 /* Get interface number for composite device */
946 ifnum = sierra_calc_interface(serial);
947 himemoryp =
948 (struct sierra_iface_info *)&typeB_interface_list;
949 if (is_himemory(ifnum, himemoryp)) {
950 portdata->num_out_urbs = N_OUT_URB_HM;
951 portdata->num_in_urbs = N_IN_URB_HM;
952 }
953 }
954 else {
955 himemoryp =
956 (struct sierra_iface_info *)&typeA_interface_list;
957 if (is_himemory(i, himemoryp)) {
958 portdata->num_out_urbs = N_OUT_URB_HM;
959 portdata->num_in_urbs = N_IN_URB_HM;
960 }
961 }
962 dev_dbg(&serial->dev->dev,
963 "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
964 ifnum,portdata->num_in_urbs, portdata->num_out_urbs );
965 /* Set the port private data pointer */
966 usb_set_serial_port_data(port, portdata);
967 }
968
969 return 0;
970 }
971
972 static void sierra_release(struct usb_serial *serial)
973 {
974 int i;
975 struct usb_serial_port *port;
976 struct sierra_port_private *portdata;
977
978 dev_dbg(&serial->dev->dev, "%s\n", __func__);
979
980 for (i = 0; i < serial->num_ports; ++i) {
981 port = serial->port[i];
982 if (!port)
983 continue;
984 portdata = usb_get_serial_port_data(port);
985 if (!portdata)
986 continue;
987 kfree(portdata);
988 }
989 }
990
991 #ifdef CONFIG_PM
992 static void stop_read_write_urbs(struct usb_serial *serial)
993 {
994 int i;
995 struct usb_serial_port *port;
996 struct sierra_port_private *portdata;
997
998 /* Stop reading/writing urbs */
999 for (i = 0; i < serial->num_ports; ++i) {
1000 port = serial->port[i];
1001 portdata = usb_get_serial_port_data(port);
1002 sierra_stop_rx_urbs(port);
1003 usb_kill_anchored_urbs(&portdata->active);
1004 }
1005 }
1006
1007 static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
1008 {
1009 struct sierra_intf_private *intfdata;
1010 int b;
1011
1012 if (message.event & PM_EVENT_AUTO) {
1013 intfdata = serial->private;
1014 spin_lock_irq(&intfdata->susp_lock);
1015 b = intfdata->in_flight;
1016
1017 if (b) {
1018 spin_unlock_irq(&intfdata->susp_lock);
1019 return -EBUSY;
1020 } else {
1021 intfdata->suspended = 1;
1022 spin_unlock_irq(&intfdata->susp_lock);
1023 }
1024 }
1025 stop_read_write_urbs(serial);
1026
1027 return 0;
1028 }
1029
1030 static int sierra_resume(struct usb_serial *serial)
1031 {
1032 struct usb_serial_port *port;
1033 struct sierra_intf_private *intfdata = serial->private;
1034 struct sierra_port_private *portdata;
1035 struct urb *urb;
1036 int ec = 0;
1037 int i, err;
1038
1039 spin_lock_irq(&intfdata->susp_lock);
1040 for (i = 0; i < serial->num_ports; i++) {
1041 port = serial->port[i];
1042 portdata = usb_get_serial_port_data(port);
1043
1044 while ((urb = usb_get_from_anchor(&portdata->delayed))) {
1045 usb_anchor_urb(urb, &portdata->active);
1046 intfdata->in_flight++;
1047 err = usb_submit_urb(urb, GFP_ATOMIC);
1048 if (err < 0) {
1049 intfdata->in_flight--;
1050 usb_unanchor_urb(urb);
1051 usb_scuttle_anchored_urbs(&portdata->delayed);
1052 break;
1053 }
1054 }
1055
1056 if (portdata->opened) {
1057 err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1058 if (err)
1059 ec++;
1060 }
1061 }
1062 intfdata->suspended = 0;
1063 spin_unlock_irq(&intfdata->susp_lock);
1064
1065 return ec ? -EIO : 0;
1066 }
1067
1068 static int sierra_reset_resume(struct usb_interface *intf)
1069 {
1070 struct usb_serial *serial = usb_get_intfdata(intf);
1071 dev_err(&serial->dev->dev, "%s\n", __func__);
1072 return usb_serial_resume(intf);
1073 }
1074 #else
1075 #define sierra_suspend NULL
1076 #define sierra_resume NULL
1077 #define sierra_reset_resume NULL
1078 #endif
1079
1080 static struct usb_driver sierra_driver = {
1081 .name = "sierra",
1082 .probe = usb_serial_probe,
1083 .disconnect = usb_serial_disconnect,
1084 .suspend = usb_serial_suspend,
1085 .resume = usb_serial_resume,
1086 .reset_resume = sierra_reset_resume,
1087 .id_table = id_table,
1088 .no_dynamic_id = 1,
1089 .supports_autosuspend = 1,
1090 };
1091
1092 static struct usb_serial_driver sierra_device = {
1093 .driver = {
1094 .owner = THIS_MODULE,
1095 .name = "sierra",
1096 },
1097 .description = "Sierra USB modem",
1098 .id_table = id_table,
1099 .usb_driver = &sierra_driver,
1100 .calc_num_ports = sierra_calc_num_ports,
1101 .probe = sierra_probe,
1102 .open = sierra_open,
1103 .close = sierra_close,
1104 .dtr_rts = sierra_dtr_rts,
1105 .write = sierra_write,
1106 .write_room = sierra_write_room,
1107 .set_termios = sierra_set_termios,
1108 .tiocmget = sierra_tiocmget,
1109 .tiocmset = sierra_tiocmset,
1110 .attach = sierra_startup,
1111 .release = sierra_release,
1112 .suspend = sierra_suspend,
1113 .resume = sierra_resume,
1114 .read_int_callback = sierra_instat_callback,
1115 };
1116
1117 /* Functions used by new usb-serial code. */
1118 static int __init sierra_init(void)
1119 {
1120 int retval;
1121 retval = usb_serial_register(&sierra_device);
1122 if (retval)
1123 goto failed_device_register;
1124
1125
1126 retval = usb_register(&sierra_driver);
1127 if (retval)
1128 goto failed_driver_register;
1129
1130 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1131 DRIVER_DESC "\n");
1132
1133 return 0;
1134
1135 failed_driver_register:
1136 usb_serial_deregister(&sierra_device);
1137 failed_device_register:
1138 return retval;
1139 }
1140
1141 static void __exit sierra_exit(void)
1142 {
1143 usb_deregister(&sierra_driver);
1144 usb_serial_deregister(&sierra_device);
1145 }
1146
1147 module_init(sierra_init);
1148 module_exit(sierra_exit);
1149
1150 MODULE_AUTHOR(DRIVER_AUTHOR);
1151 MODULE_DESCRIPTION(DRIVER_DESC);
1152 MODULE_VERSION(DRIVER_VERSION);
1153 MODULE_LICENSE("GPL");
1154
1155 module_param(nmea, bool, S_IRUGO | S_IWUSR);
1156 MODULE_PARM_DESC(nmea, "NMEA streaming");
1157
1158 module_param(debug, bool, S_IRUGO | S_IWUSR);
1159 MODULE_PARM_DESC(debug, "Debug messages");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree