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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / serial / sierra.c
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 bool debug;
50 static bool 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 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
67 SWIMS_USB_REQUEST_SetPower, /* __u8 request */
68 USB_TYPE_VENDOR, /* __u8 request type */
69 swiState, /* __u16 value */
70 0, /* __u16 index */
71 NULL, /* void *data */
72 0, /* __u16 size */
73 USB_CTRL_SET_TIMEOUT); /* int timeout */
74 }
75
76 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
77 {
78 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
79 SWIMS_USB_REQUEST_SetNmea, /* __u8 request */
80 USB_TYPE_VENDOR, /* __u8 request type */
81 enable, /* __u16 value */
82 0x0000, /* __u16 index */
83 NULL, /* void *data */
84 0, /* __u16 size */
85 USB_CTRL_SET_TIMEOUT); /* int timeout */
86 }
87
88 static int sierra_calc_num_ports(struct usb_serial *serial)
89 {
90 int num_ports = 0;
91 u8 ifnum, numendpoints;
92
93 ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
94 numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
95
96 /* Dummy interface present on some SKUs should be ignored */
97 if (ifnum == 0x99)
98 num_ports = 0;
99 else if (numendpoints <= 3)
100 num_ports = 1;
101 else
102 num_ports = (numendpoints-1)/2;
103 return num_ports;
104 }
105
106 static int is_blacklisted(const u8 ifnum,
107 const struct sierra_iface_info *blacklist)
108 {
109 const u8 *info;
110 int i;
111
112 if (blacklist) {
113 info = blacklist->ifaceinfo;
114
115 for (i = 0; i < blacklist->infolen; i++) {
116 if (info[i] == ifnum)
117 return 1;
118 }
119 }
120 return 0;
121 }
122
123 static int is_himemory(const u8 ifnum,
124 const struct sierra_iface_info *himemorylist)
125 {
126 const u8 *info;
127 int i;
128
129 if (himemorylist) {
130 info = himemorylist->ifaceinfo;
131
132 for (i=0; i < himemorylist->infolen; i++) {
133 if (info[i] == ifnum)
134 return 1;
135 }
136 }
137 return 0;
138 }
139
140 static int sierra_calc_interface(struct usb_serial *serial)
141 {
142 int interface;
143 struct usb_interface *p_interface;
144 struct usb_host_interface *p_host_interface;
145
146 /* Get the interface structure pointer from the serial struct */
147 p_interface = serial->interface;
148
149 /* Get a pointer to the host interface structure */
150 p_host_interface = p_interface->cur_altsetting;
151
152 /* read the interface descriptor for this active altsetting
153 * to find out the interface number we are on
154 */
155 interface = p_host_interface->desc.bInterfaceNumber;
156
157 return interface;
158 }
159
160 static int sierra_probe(struct usb_serial *serial,
161 const struct usb_device_id *id)
162 {
163 int result = 0;
164 struct usb_device *udev;
165 struct sierra_intf_private *data;
166 u8 ifnum;
167
168 udev = serial->dev;
169 ifnum = sierra_calc_interface(serial);
170
171 /*
172 * If this interface supports more than 1 alternate
173 * select the 2nd one
174 */
175 if (serial->interface->num_altsetting == 2) {
176 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
177 ifnum);
178 /* We know the alternate setting is 1 for the MC8785 */
179 usb_set_interface(udev, ifnum, 1);
180 }
181
182 /* ifnum could have changed - by calling usb_set_interface */
183 ifnum = sierra_calc_interface(serial);
184
185 if (is_blacklisted(ifnum,
186 (struct sierra_iface_info *)id->driver_info)) {
187 dev_dbg(&serial->dev->dev,
188 "Ignoring blacklisted interface #%d\n", ifnum);
189 return -ENODEV;
190 }
191
192 data = serial->private = kzalloc(sizeof(struct sierra_intf_private), GFP_KERNEL);
193 if (!data)
194 return -ENOMEM;
195 spin_lock_init(&data->susp_lock);
196
197 return result;
198 }
199
200 /* interfaces with higher memory requirements */
201 static const u8 hi_memory_typeA_ifaces[] = { 0, 2 };
202 static const struct sierra_iface_info typeA_interface_list = {
203 .infolen = ARRAY_SIZE(hi_memory_typeA_ifaces),
204 .ifaceinfo = hi_memory_typeA_ifaces,
205 };
206
207 static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 };
208 static const struct sierra_iface_info typeB_interface_list = {
209 .infolen = ARRAY_SIZE(hi_memory_typeB_ifaces),
210 .ifaceinfo = hi_memory_typeB_ifaces,
211 };
212
213 /* 'blacklist' of interfaces not served by this driver */
214 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11, 19, 20 };
215 static const struct sierra_iface_info direct_ip_interface_blacklist = {
216 .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces),
217 .ifaceinfo = direct_ip_non_serial_ifaces,
218 };
219
220 static const struct usb_device_id id_table[] = {
221 { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
222 { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
223 { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */
224 { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
225
226 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
227 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
228 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
229 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
230 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
231 { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
232 { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
233 { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
234 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
235 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
236 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
237 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
238 { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U */
239 /* Sierra Wireless C597 */
240 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
241 /* Sierra Wireless T598 */
242 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
243 { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
244 { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
245 { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
246 { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */
247
248 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
249 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
250 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
251 { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
252 { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
253 { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
254 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
255 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
256 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
257 { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
258 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
259 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
260 { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
261 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
262 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
263 { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
264 { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
265 { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
266 { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
267 { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
268 { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
269 /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
270 { USB_DEVICE(0x1199, 0x683C) },
271 { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
272 /* Sierra Wireless MC8790, MC8791, MC8792 */
273 { USB_DEVICE(0x1199, 0x683E) },
274 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
275 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
276 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
277 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
278 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
279 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
280 { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
281 { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
282 /* Sierra Wireless C885 */
283 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
284 /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
285 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
286 /* Sierra Wireless C22/C33 */
287 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
288 /* Sierra Wireless HSPA Non-Composite Device */
289 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
290 { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
291 { USB_DEVICE(0x1199, 0x68A2), /* Sierra Wireless MC77xx in QMI mode */
292 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
293 },
294 { USB_DEVICE(0x1199, 0x68A3), /* Sierra Wireless Direct IP modems */
295 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
296 },
297 /* AT&T Direct IP LTE modems */
298 { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68AA, 0xFF, 0xFF, 0xFF),
299 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
300 },
301 { USB_DEVICE(0x0f3d, 0x68A3), /* Airprime/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 portdata = usb_get_serial_port_data(port);
342
343 if (portdata->dtr_state)
344 val |= 0x01;
345 if (portdata->rts_state)
346 val |= 0x02;
347
348 /* If composite device then properly report interface */
349 if (serial->num_ports == 1) {
350 interface = sierra_calc_interface(serial);
351 /* Control message is sent only to interfaces with
352 * interrupt_in endpoints
353 */
354 if (port->interrupt_in_urb) {
355 /* send control message */
356 do_send = 1;
357 }
358 }
359
360 /* Otherwise the need to do non-composite mapping */
361 else {
362 if (port->bulk_out_endpointAddress == 2)
363 interface = 0;
364 else if (port->bulk_out_endpointAddress == 4)
365 interface = 1;
366 else if (port->bulk_out_endpointAddress == 5)
367 interface = 2;
368
369 do_send = 1;
370 }
371 if (!do_send)
372 return 0;
373
374 retval = usb_autopm_get_interface(serial->interface);
375 if (retval < 0)
376 return retval;
377
378 retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
379 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
380 usb_autopm_put_interface(serial->interface);
381
382 return retval;
383 }
384
385 static void sierra_set_termios(struct tty_struct *tty,
386 struct usb_serial_port *port, struct ktermios *old_termios)
387 {
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)
393 {
394 struct usb_serial_port *port = tty->driver_data;
395 unsigned int value;
396 struct sierra_port_private *portdata;
397
398 portdata = usb_get_serial_port_data(port);
399
400 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
401 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
402 ((portdata->cts_state) ? TIOCM_CTS : 0) |
403 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
404 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
405 ((portdata->ri_state) ? TIOCM_RNG : 0);
406
407 return value;
408 }
409
410 static int sierra_tiocmset(struct tty_struct *tty,
411 unsigned int set, unsigned int clear)
412 {
413 struct usb_serial_port *port = tty->driver_data;
414 struct sierra_port_private *portdata;
415
416 portdata = usb_get_serial_port_data(port);
417
418 if (set & TIOCM_RTS)
419 portdata->rts_state = 1;
420 if (set & TIOCM_DTR)
421 portdata->dtr_state = 1;
422
423 if (clear & TIOCM_RTS)
424 portdata->rts_state = 0;
425 if (clear & TIOCM_DTR)
426 portdata->dtr_state = 0;
427 return sierra_send_setup(port);
428 }
429
430 static void sierra_release_urb(struct urb *urb)
431 {
432 struct usb_serial_port *port;
433 if (urb) {
434 port = urb->context;
435 kfree(urb->transfer_buffer);
436 usb_free_urb(urb);
437 }
438 }
439
440 static void sierra_outdat_callback(struct urb *urb)
441 {
442 struct usb_serial_port *port = urb->context;
443 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
444 struct sierra_intf_private *intfdata;
445 int status = urb->status;
446
447 intfdata = port->serial->private;
448
449 /* free up the transfer buffer, as usb_free_urb() does not do this */
450 kfree(urb->transfer_buffer);
451 usb_autopm_put_interface_async(port->serial->interface);
452 if (status)
453 dev_dbg(&port->dev, "%s - nonzero write bulk status "
454 "received: %d\n", __func__, status);
455
456 spin_lock(&portdata->lock);
457 --portdata->outstanding_urbs;
458 spin_unlock(&portdata->lock);
459 spin_lock(&intfdata->susp_lock);
460 --intfdata->in_flight;
461 spin_unlock(&intfdata->susp_lock);
462
463 usb_serial_port_softint(port);
464 }
465
466 /* Write */
467 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
468 const unsigned char *buf, int count)
469 {
470 struct sierra_port_private *portdata;
471 struct sierra_intf_private *intfdata;
472 struct usb_serial *serial = port->serial;
473 unsigned long flags;
474 unsigned char *buffer;
475 struct urb *urb;
476 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
477 int retval = 0;
478
479 /* verify that we actually have some data to write */
480 if (count == 0)
481 return 0;
482
483 portdata = usb_get_serial_port_data(port);
484 intfdata = serial->private;
485
486 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
487 spin_lock_irqsave(&portdata->lock, flags);
488 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
489 portdata->outstanding_urbs);
490 if (portdata->outstanding_urbs > portdata->num_out_urbs) {
491 spin_unlock_irqrestore(&portdata->lock, flags);
492 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
493 return 0;
494 }
495 portdata->outstanding_urbs++;
496 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
497 portdata->outstanding_urbs);
498 spin_unlock_irqrestore(&portdata->lock, flags);
499
500 retval = usb_autopm_get_interface_async(serial->interface);
501 if (retval < 0) {
502 spin_lock_irqsave(&portdata->lock, flags);
503 portdata->outstanding_urbs--;
504 spin_unlock_irqrestore(&portdata->lock, flags);
505 goto error_simple;
506 }
507
508 buffer = kmalloc(writesize, GFP_ATOMIC);
509 if (!buffer) {
510 dev_err(&port->dev, "out of memory\n");
511 retval = -ENOMEM;
512 goto error_no_buffer;
513 }
514
515 urb = usb_alloc_urb(0, GFP_ATOMIC);
516 if (!urb) {
517 dev_err(&port->dev, "no more free urbs\n");
518 retval = -ENOMEM;
519 goto error_no_urb;
520 }
521
522 memcpy(buffer, buf, writesize);
523
524 usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer);
525
526 usb_fill_bulk_urb(urb, serial->dev,
527 usb_sndbulkpipe(serial->dev,
528 port->bulk_out_endpointAddress),
529 buffer, writesize, sierra_outdat_callback, port);
530
531 /* Handle the need to send a zero length packet */
532 urb->transfer_flags |= URB_ZERO_PACKET;
533
534 spin_lock_irqsave(&intfdata->susp_lock, flags);
535
536 if (intfdata->suspended) {
537 usb_anchor_urb(urb, &portdata->delayed);
538 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
539 goto skip_power;
540 } else {
541 usb_anchor_urb(urb, &portdata->active);
542 }
543 /* send it down the pipe */
544 retval = usb_submit_urb(urb, GFP_ATOMIC);
545 if (retval) {
546 usb_unanchor_urb(urb);
547 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
548 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
549 "with status = %d\n", __func__, retval);
550 goto error;
551 } else {
552 intfdata->in_flight++;
553 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
554 }
555
556 skip_power:
557 /* we are done with this urb, so let the host driver
558 * really free it when it is finished with it */
559 usb_free_urb(urb);
560
561 return writesize;
562 error:
563 usb_free_urb(urb);
564 error_no_urb:
565 kfree(buffer);
566 error_no_buffer:
567 spin_lock_irqsave(&portdata->lock, flags);
568 --portdata->outstanding_urbs;
569 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
570 portdata->outstanding_urbs);
571 spin_unlock_irqrestore(&portdata->lock, flags);
572 usb_autopm_put_interface_async(serial->interface);
573 error_simple:
574 return retval;
575 }
576
577 static void sierra_indat_callback(struct urb *urb)
578 {
579 int err;
580 int endpoint;
581 struct usb_serial_port *port;
582 struct tty_struct *tty;
583 unsigned char *data = urb->transfer_buffer;
584 int status = urb->status;
585
586 endpoint = usb_pipeendpoint(urb->pipe);
587 port = urb->context;
588
589 if (status) {
590 dev_dbg(&port->dev, "%s: nonzero status: %d on"
591 " endpoint %02x\n", __func__, status, endpoint);
592 } else {
593 if (urb->actual_length) {
594 tty = tty_port_tty_get(&port->port);
595 if (tty) {
596 tty_insert_flip_string(tty, data,
597 urb->actual_length);
598 tty_flip_buffer_push(tty);
599
600 tty_kref_put(tty);
601 usb_serial_debug_data(debug, &port->dev,
602 __func__, urb->actual_length, data);
603 }
604 } else {
605 dev_dbg(&port->dev, "%s: empty read urb"
606 " received\n", __func__);
607 }
608 }
609
610 /* Resubmit urb so we continue receiving */
611 if (status != -ESHUTDOWN && status != -EPERM) {
612 usb_mark_last_busy(port->serial->dev);
613 err = usb_submit_urb(urb, GFP_ATOMIC);
614 if (err && err != -EPERM)
615 dev_err(&port->dev, "resubmit read urb failed."
616 "(%d)\n", err);
617 }
618 }
619
620 static void sierra_instat_callback(struct urb *urb)
621 {
622 int err;
623 int status = urb->status;
624 struct usb_serial_port *port = urb->context;
625 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
626 struct usb_serial *serial = port->serial;
627
628 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
629 urb, port, portdata);
630
631 if (status == 0) {
632 struct usb_ctrlrequest *req_pkt =
633 (struct usb_ctrlrequest *)urb->transfer_buffer;
634
635 if (!req_pkt) {
636 dev_dbg(&port->dev, "%s: NULL req_pkt\n",
637 __func__);
638 return;
639 }
640 if ((req_pkt->bRequestType == 0xA1) &&
641 (req_pkt->bRequest == 0x20)) {
642 int old_dcd_state;
643 unsigned char signals = *((unsigned char *)
644 urb->transfer_buffer +
645 sizeof(struct usb_ctrlrequest));
646 struct tty_struct *tty;
647
648 dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
649 signals);
650
651 old_dcd_state = portdata->dcd_state;
652 portdata->cts_state = 1;
653 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
654 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
655 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
656
657 tty = tty_port_tty_get(&port->port);
658 if (tty && !C_CLOCAL(tty) &&
659 old_dcd_state && !portdata->dcd_state)
660 tty_hangup(tty);
661 tty_kref_put(tty);
662 } else {
663 dev_dbg(&port->dev, "%s: type %x req %x\n",
664 __func__, req_pkt->bRequestType,
665 req_pkt->bRequest);
666 }
667 } else
668 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
669
670 /* Resubmit urb so we continue receiving IRQ data */
671 if (status != -ESHUTDOWN && status != -ENOENT) {
672 usb_mark_last_busy(serial->dev);
673 err = usb_submit_urb(urb, GFP_ATOMIC);
674 if (err && err != -EPERM)
675 dev_err(&port->dev, "%s: resubmit intr urb "
676 "failed. (%d)\n", __func__, err);
677 }
678 }
679
680 static int sierra_write_room(struct tty_struct *tty)
681 {
682 struct usb_serial_port *port = tty->driver_data;
683 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
684 unsigned long flags;
685
686 /* try to give a good number back based on if we have any free urbs at
687 * this point in time */
688 spin_lock_irqsave(&portdata->lock, flags);
689 if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) {
690 spin_unlock_irqrestore(&portdata->lock, flags);
691 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
692 return 0;
693 }
694 spin_unlock_irqrestore(&portdata->lock, flags);
695
696 return 2048;
697 }
698
699 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
700 {
701 int i;
702 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
703
704 for (i = 0; i < portdata->num_in_urbs; i++)
705 usb_kill_urb(portdata->in_urbs[i]);
706
707 usb_kill_urb(port->interrupt_in_urb);
708 }
709
710 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
711 {
712 int ok_cnt;
713 int err = -EINVAL;
714 int i;
715 struct urb *urb;
716 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
717
718 ok_cnt = 0;
719 for (i = 0; i < portdata->num_in_urbs; i++) {
720 urb = portdata->in_urbs[i];
721 if (!urb)
722 continue;
723 err = usb_submit_urb(urb, mem_flags);
724 if (err) {
725 dev_err(&port->dev, "%s: submit urb failed: %d\n",
726 __func__, err);
727 } else {
728 ok_cnt++;
729 }
730 }
731
732 if (ok_cnt && port->interrupt_in_urb) {
733 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
734 if (err) {
735 dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
736 __func__, err);
737 }
738 }
739
740 if (ok_cnt > 0) /* at least one rx urb submitted */
741 return 0;
742 else
743 return err;
744 }
745
746 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
747 int dir, void *ctx, int len,
748 gfp_t mem_flags,
749 usb_complete_t callback)
750 {
751 struct urb *urb;
752 u8 *buf;
753
754 if (endpoint == -1)
755 return NULL;
756
757 urb = usb_alloc_urb(0, mem_flags);
758 if (urb == NULL) {
759 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
760 __func__, endpoint);
761 return NULL;
762 }
763
764 buf = kmalloc(len, mem_flags);
765 if (buf) {
766 /* Fill URB using supplied data */
767 usb_fill_bulk_urb(urb, serial->dev,
768 usb_sndbulkpipe(serial->dev, endpoint) | dir,
769 buf, len, callback, ctx);
770
771 /* debug */
772 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
773 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
774 } else {
775 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
776 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
777
778 sierra_release_urb(urb);
779 urb = NULL;
780 }
781
782 return urb;
783 }
784
785 static void sierra_close(struct usb_serial_port *port)
786 {
787 int i;
788 struct usb_serial *serial = port->serial;
789 struct sierra_port_private *portdata;
790 struct sierra_intf_private *intfdata = port->serial->private;
791
792 portdata = usb_get_serial_port_data(port);
793
794 portdata->rts_state = 0;
795 portdata->dtr_state = 0;
796
797 if (serial->dev) {
798 mutex_lock(&serial->disc_mutex);
799 if (!serial->disconnected) {
800 serial->interface->needs_remote_wakeup = 0;
801 /* odd error handling due to pm counters */
802 if (!usb_autopm_get_interface(serial->interface))
803 sierra_send_setup(port);
804 else
805 usb_autopm_get_interface_no_resume(serial->interface);
806
807 }
808 mutex_unlock(&serial->disc_mutex);
809 spin_lock_irq(&intfdata->susp_lock);
810 portdata->opened = 0;
811 spin_unlock_irq(&intfdata->susp_lock);
812
813
814 /* Stop reading urbs */
815 sierra_stop_rx_urbs(port);
816 /* .. and release them */
817 for (i = 0; i < portdata->num_in_urbs; i++) {
818 sierra_release_urb(portdata->in_urbs[i]);
819 portdata->in_urbs[i] = NULL;
820 }
821 }
822 }
823
824 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
825 {
826 struct sierra_port_private *portdata;
827 struct usb_serial *serial = port->serial;
828 struct sierra_intf_private *intfdata = serial->private;
829 int i;
830 int err;
831 int endpoint;
832 struct urb *urb;
833
834 portdata = usb_get_serial_port_data(port);
835
836 /* Set some sane defaults */
837 portdata->rts_state = 1;
838 portdata->dtr_state = 1;
839
840
841 endpoint = port->bulk_in_endpointAddress;
842 for (i = 0; i < portdata->num_in_urbs; i++) {
843 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
844 IN_BUFLEN, GFP_KERNEL,
845 sierra_indat_callback);
846 portdata->in_urbs[i] = urb;
847 }
848 /* clear halt condition */
849 usb_clear_halt(serial->dev,
850 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
851
852 err = sierra_submit_rx_urbs(port, GFP_KERNEL);
853 if (err) {
854 /* get rid of everything as in close */
855 sierra_close(port);
856 /* restore balance for autopm */
857 if (!serial->disconnected)
858 usb_autopm_put_interface(serial->interface);
859 return err;
860 }
861 sierra_send_setup(port);
862
863 serial->interface->needs_remote_wakeup = 1;
864 spin_lock_irq(&intfdata->susp_lock);
865 portdata->opened = 1;
866 spin_unlock_irq(&intfdata->susp_lock);
867 usb_autopm_put_interface(serial->interface);
868
869 return 0;
870 }
871
872
873 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
874 {
875 struct usb_serial *serial = port->serial;
876 struct sierra_port_private *portdata;
877
878 portdata = usb_get_serial_port_data(port);
879 portdata->rts_state = on;
880 portdata->dtr_state = on;
881
882 if (serial->dev) {
883 mutex_lock(&serial->disc_mutex);
884 if (!serial->disconnected)
885 sierra_send_setup(port);
886 mutex_unlock(&serial->disc_mutex);
887 }
888 }
889
890 static int sierra_startup(struct usb_serial *serial)
891 {
892 struct usb_serial_port *port;
893 struct sierra_port_private *portdata;
894 struct sierra_iface_info *himemoryp = NULL;
895 int i;
896 u8 ifnum;
897
898 /* Set Device mode to D0 */
899 sierra_set_power_state(serial->dev, 0x0000);
900
901 /* Check NMEA and set */
902 if (nmea)
903 sierra_vsc_set_nmea(serial->dev, 1);
904
905 /* Now setup per port private data */
906 for (i = 0; i < serial->num_ports; i++) {
907 port = serial->port[i];
908 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
909 if (!portdata) {
910 dev_dbg(&port->dev, "%s: kmalloc for "
911 "sierra_port_private (%d) failed!\n",
912 __func__, i);
913 return -ENOMEM;
914 }
915 spin_lock_init(&portdata->lock);
916 init_usb_anchor(&portdata->active);
917 init_usb_anchor(&portdata->delayed);
918 ifnum = i;
919 /* Assume low memory requirements */
920 portdata->num_out_urbs = N_OUT_URB;
921 portdata->num_in_urbs = N_IN_URB;
922
923 /* Determine actual memory requirements */
924 if (serial->num_ports == 1) {
925 /* Get interface number for composite device */
926 ifnum = sierra_calc_interface(serial);
927 himemoryp =
928 (struct sierra_iface_info *)&typeB_interface_list;
929 if (is_himemory(ifnum, himemoryp)) {
930 portdata->num_out_urbs = N_OUT_URB_HM;
931 portdata->num_in_urbs = N_IN_URB_HM;
932 }
933 }
934 else {
935 himemoryp =
936 (struct sierra_iface_info *)&typeA_interface_list;
937 if (is_himemory(i, himemoryp)) {
938 portdata->num_out_urbs = N_OUT_URB_HM;
939 portdata->num_in_urbs = N_IN_URB_HM;
940 }
941 }
942 dev_dbg(&serial->dev->dev,
943 "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
944 ifnum,portdata->num_in_urbs, portdata->num_out_urbs );
945 /* Set the port private data pointer */
946 usb_set_serial_port_data(port, portdata);
947 }
948
949 return 0;
950 }
951
952 static void sierra_release(struct usb_serial *serial)
953 {
954 int i;
955 struct usb_serial_port *port;
956 struct sierra_port_private *portdata;
957
958 for (i = 0; i < serial->num_ports; ++i) {
959 port = serial->port[i];
960 if (!port)
961 continue;
962 portdata = usb_get_serial_port_data(port);
963 if (!portdata)
964 continue;
965 kfree(portdata);
966 }
967 }
968
969 #ifdef CONFIG_PM
970 static void stop_read_write_urbs(struct usb_serial *serial)
971 {
972 int i;
973 struct usb_serial_port *port;
974 struct sierra_port_private *portdata;
975
976 /* Stop reading/writing urbs */
977 for (i = 0; i < serial->num_ports; ++i) {
978 port = serial->port[i];
979 portdata = usb_get_serial_port_data(port);
980 sierra_stop_rx_urbs(port);
981 usb_kill_anchored_urbs(&portdata->active);
982 }
983 }
984
985 static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
986 {
987 struct sierra_intf_private *intfdata;
988 int b;
989
990 if (PMSG_IS_AUTO(message)) {
991 intfdata = serial->private;
992 spin_lock_irq(&intfdata->susp_lock);
993 b = intfdata->in_flight;
994
995 if (b) {
996 spin_unlock_irq(&intfdata->susp_lock);
997 return -EBUSY;
998 } else {
999 intfdata->suspended = 1;
1000 spin_unlock_irq(&intfdata->susp_lock);
1001 }
1002 }
1003 stop_read_write_urbs(serial);
1004
1005 return 0;
1006 }
1007
1008 static int sierra_resume(struct usb_serial *serial)
1009 {
1010 struct usb_serial_port *port;
1011 struct sierra_intf_private *intfdata = serial->private;
1012 struct sierra_port_private *portdata;
1013 struct urb *urb;
1014 int ec = 0;
1015 int i, err;
1016
1017 spin_lock_irq(&intfdata->susp_lock);
1018 for (i = 0; i < serial->num_ports; i++) {
1019 port = serial->port[i];
1020 portdata = usb_get_serial_port_data(port);
1021
1022 while ((urb = usb_get_from_anchor(&portdata->delayed))) {
1023 usb_anchor_urb(urb, &portdata->active);
1024 intfdata->in_flight++;
1025 err = usb_submit_urb(urb, GFP_ATOMIC);
1026 if (err < 0) {
1027 intfdata->in_flight--;
1028 usb_unanchor_urb(urb);
1029 usb_scuttle_anchored_urbs(&portdata->delayed);
1030 break;
1031 }
1032 }
1033
1034 if (portdata->opened) {
1035 err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1036 if (err)
1037 ec++;
1038 }
1039 }
1040 intfdata->suspended = 0;
1041 spin_unlock_irq(&intfdata->susp_lock);
1042
1043 return ec ? -EIO : 0;
1044 }
1045
1046 #else
1047 #define sierra_suspend NULL
1048 #define sierra_resume NULL
1049 #endif
1050
1051 static struct usb_serial_driver sierra_device = {
1052 .driver = {
1053 .owner = THIS_MODULE,
1054 .name = "sierra",
1055 },
1056 .description = "Sierra USB modem",
1057 .id_table = id_table,
1058 .calc_num_ports = sierra_calc_num_ports,
1059 .probe = sierra_probe,
1060 .open = sierra_open,
1061 .close = sierra_close,
1062 .dtr_rts = sierra_dtr_rts,
1063 .write = sierra_write,
1064 .write_room = sierra_write_room,
1065 .set_termios = sierra_set_termios,
1066 .tiocmget = sierra_tiocmget,
1067 .tiocmset = sierra_tiocmset,
1068 .attach = sierra_startup,
1069 .release = sierra_release,
1070 .suspend = sierra_suspend,
1071 .resume = sierra_resume,
1072 .read_int_callback = sierra_instat_callback,
1073 };
1074
1075 static struct usb_serial_driver * const serial_drivers[] = {
1076 &sierra_device, NULL
1077 };
1078
1079 module_usb_serial_driver(serial_drivers, id_table);
1080
1081 MODULE_AUTHOR(DRIVER_AUTHOR);
1082 MODULE_DESCRIPTION(DRIVER_DESC);
1083 MODULE_VERSION(DRIVER_VERSION);
1084 MODULE_LICENSE("GPL");
1085
1086 module_param(nmea, bool, S_IRUGO | S_IWUSR);
1087 MODULE_PARM_DESC(nmea, "NMEA streaming");
1088
1089 module_param(debug, bool, S_IRUGO | S_IWUSR);
1090 MODULE_PARM_DESC(debug, "Debug messages");
kernel source for telekom puls (alcatel/mediatek)