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init from v2.6.32.60
[mach-moxart.git] / drivers / usb / serial / sierra.c
blob1b5c9f809cca180f3148191ec0b9ea2c5d38826d
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
20 #define DRIVER_VERSION "v.1.3.8"
21 #define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer"
22 #define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
23
24 #include <linux/kernel.h>
25 #include <linux/jiffies.h>
26 #include <linux/errno.h>
27 #include <linux/tty.h>
28 #include <linux/tty_flip.h>
29 #include <linux/module.h>
30 #include <linux/usb.h>
31 #include <linux/usb/serial.h>
32
33 #define SWIMS_USB_REQUEST_SetPower 0x00
34 #define SWIMS_USB_REQUEST_SetNmea 0x07
35
36 #define N_IN_URB 8
37 #define N_OUT_URB 64
38 #define IN_BUFLEN 4096
39
40 #define MAX_TRANSFER (PAGE_SIZE - 512)
41 /* MAX_TRANSFER is chosen so that the VM is not stressed by
42 allocations > PAGE_SIZE and the number of packets in a page
43 is an integer 512 is the largest possible packet on EHCI */
44
45 static int debug;
46 static int nmea;
47
48 /* Used in interface blacklisting */
49 struct sierra_iface_info {
50 const u32 infolen; /* number of interface numbers on blacklist */
51 const u8 *ifaceinfo; /* pointer to the array holding the numbers */
52 };
53
54 struct sierra_intf_private {
55 spinlock_t susp_lock;
56 unsigned int suspended:1;
57 int in_flight;
58 };
59
60 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
61 {
62 int result;
63 dev_dbg(&udev->dev, "%s\n", __func__);
64 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
65 SWIMS_USB_REQUEST_SetPower, /* __u8 request */
66 USB_TYPE_VENDOR, /* __u8 request type */
67 swiState, /* __u16 value */
68 0, /* __u16 index */
69 NULL, /* void *data */
70 0, /* __u16 size */
71 USB_CTRL_SET_TIMEOUT); /* int timeout */
72 return result;
73 }
74
75 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
76 {
77 int result;
78 dev_dbg(&udev->dev, "%s\n", __func__);
79 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
80 SWIMS_USB_REQUEST_SetNmea, /* __u8 request */
81 USB_TYPE_VENDOR, /* __u8 request type */
82 enable, /* __u16 value */
83 0x0000, /* __u16 index */
84 NULL, /* void *data */
85 0, /* __u16 size */
86 USB_CTRL_SET_TIMEOUT); /* int timeout */
87 return result;
88 }
89
90 static int sierra_calc_num_ports(struct usb_serial *serial)
91 {
92 int num_ports = 0;
93 u8 ifnum, numendpoints;
94
95 dev_dbg(&serial->dev->dev, "%s\n", __func__);
96
97 ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
98 numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
99
100 /* Dummy interface present on some SKUs should be ignored */
101 if (ifnum == 0x99)
102 num_ports = 0;
103 else if (numendpoints <= 3)
104 num_ports = 1;
105 else
106 num_ports = (numendpoints-1)/2;
107 return num_ports;
108 }
109
110 static int is_blacklisted(const u8 ifnum,
111 const struct sierra_iface_info *blacklist)
112 {
113 const u8 *info;
114 int i;
115
116 if (blacklist) {
117 info = blacklist->ifaceinfo;
118
119 for (i = 0; i < blacklist->infolen; i++) {
120 if (info[i] == ifnum)
121 return 1;
122 }
123 }
124 return 0;
125 }
126
127 static int sierra_calc_interface(struct usb_serial *serial)
128 {
129 int interface;
130 struct usb_interface *p_interface;
131 struct usb_host_interface *p_host_interface;
132 dev_dbg(&serial->dev->dev, "%s\n", __func__);
133
134 /* Get the interface structure pointer from the serial struct */
135 p_interface = serial->interface;
136
137 /* Get a pointer to the host interface structure */
138 p_host_interface = p_interface->cur_altsetting;
139
140 /* read the interface descriptor for this active altsetting
141 * to find out the interface number we are on
142 */
143 interface = p_host_interface->desc.bInterfaceNumber;
144
145 return interface;
146 }
147
148 static int sierra_probe(struct usb_serial *serial,
149 const struct usb_device_id *id)
150 {
151 int result = 0;
152 struct usb_device *udev;
153 struct sierra_intf_private *data;
154 u8 ifnum;
155
156 udev = serial->dev;
157 dev_dbg(&udev->dev, "%s\n", __func__);
158
159 ifnum = sierra_calc_interface(serial);
160 /*
161 * If this interface supports more than 1 alternate
162 * select the 2nd one
163 */
164 if (serial->interface->num_altsetting == 2) {
165 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
166 ifnum);
167 /* We know the alternate setting is 1 for the MC8785 */
168 usb_set_interface(udev, ifnum, 1);
169 }
170
171 /* ifnum could have changed - by calling usb_set_interface */
172 ifnum = sierra_calc_interface(serial);
173
174 if (is_blacklisted(ifnum,
175 (struct sierra_iface_info *)id->driver_info)) {
176 dev_dbg(&serial->dev->dev,
177 "Ignoring blacklisted interface #%d\n", ifnum);
178 return -ENODEV;
179 }
180
181 data = serial->private = kzalloc(sizeof(struct sierra_intf_private), GFP_KERNEL);
182 if (!data)
183 return -ENOMEM;
184 spin_lock_init(&data->susp_lock);
185
186 return result;
187 }
188
189 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11 };
190 static const struct sierra_iface_info direct_ip_interface_blacklist = {
191 .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces),
192 .ifaceinfo = direct_ip_non_serial_ifaces,
193 };
194
195 static struct usb_device_id id_table [] = {
196 { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
197 { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
198 { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */
199 { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
200
201 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
202 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
203 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
204 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
205 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
206 { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
207 { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
208 { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
209 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
210 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
211 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
212 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
213 { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U */
214 /* Sierra Wireless C597 */
215 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
216 /* Sierra Wireless T598 */
217 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
218 { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
219 { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
220 { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
221 { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */
222
223 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
224 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
225 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
226 { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
227 { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
228 { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
229 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
230 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
231 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
232 { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
233 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
234 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
235 { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
236 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
237 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
238 { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
239 { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
240 { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
241 { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
242 { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
243 { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
244 /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
245 { USB_DEVICE(0x1199, 0x683C) },
246 { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
247 /* Sierra Wireless MC8790, MC8791, MC8792 */
248 { USB_DEVICE(0x1199, 0x683E) },
249 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
250 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
251 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
252 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
253 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
254 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
255 { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
256 { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
257 /* Sierra Wireless C885 */
258 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
259 /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
260 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
261 /* Sierra Wireless C22/C33 */
262 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
263 /* Sierra Wireless HSPA Non-Composite Device */
264 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
265 { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
266 { USB_DEVICE(0x1199, 0x68A3), /* Sierra Wireless Direct IP modems */
267 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
268 },
269 { USB_DEVICE(0x0f3d, 0x68A3), /* Airprime/Sierra Wireless Direct IP modems */
270 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
271 },
272
273 { }
274 };
275 MODULE_DEVICE_TABLE(usb, id_table);
276
277 static struct usb_driver sierra_driver = {
278 .name = "sierra",
279 .probe = usb_serial_probe,
280 .disconnect = usb_serial_disconnect,
281 .suspend = usb_serial_suspend,
282 .resume = usb_serial_resume,
283 .id_table = id_table,
284 .no_dynamic_id = 1,
285 .supports_autosuspend = 1,
286 };
287
288 struct sierra_port_private {
289 spinlock_t lock; /* lock the structure */
290 int outstanding_urbs; /* number of out urbs in flight */
291 struct usb_anchor active;
292 struct usb_anchor delayed;
293
294 /* Input endpoints and buffers for this port */
295 struct urb *in_urbs[N_IN_URB];
296
297 /* Settings for the port */
298 int rts_state; /* Handshaking pins (outputs) */
299 int dtr_state;
300 int cts_state; /* Handshaking pins (inputs) */
301 int dsr_state;
302 int dcd_state;
303 int ri_state;
304 unsigned int opened:1;
305 };
306
307 static int sierra_send_setup(struct usb_serial_port *port)
308 {
309 struct usb_serial *serial = port->serial;
310 struct sierra_port_private *portdata;
311 __u16 interface = 0;
312 int val = 0;
313 int do_send = 0;
314 int retval;
315
316 dev_dbg(&port->dev, "%s\n", __func__);
317
318 portdata = usb_get_serial_port_data(port);
319
320 if (portdata->dtr_state)
321 val |= 0x01;
322 if (portdata->rts_state)
323 val |= 0x02;
324
325 /* If composite device then properly report interface */
326 if (serial->num_ports == 1) {
327 interface = sierra_calc_interface(serial);
328 /* Control message is sent only to interfaces with
329 * interrupt_in endpoints
330 */
331 if (port->interrupt_in_urb) {
332 /* send control message */
333 do_send = 1;
334 }
335 }
336
337 /* Otherwise the need to do non-composite mapping */
338 else {
339 if (port->bulk_out_endpointAddress == 2)
340 interface = 0;
341 else if (port->bulk_out_endpointAddress == 4)
342 interface = 1;
343 else if (port->bulk_out_endpointAddress == 5)
344 interface = 2;
345
346 do_send = 1;
347 }
348 if (!do_send)
349 return 0;
350
351 usb_autopm_get_interface(serial->interface);
352 retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
353 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
354 usb_autopm_put_interface(serial->interface);
355
356 return retval;
357 }
358
359 static void sierra_set_termios(struct tty_struct *tty,
360 struct usb_serial_port *port, struct ktermios *old_termios)
361 {
362 dev_dbg(&port->dev, "%s\n", __func__);
363 tty_termios_copy_hw(tty->termios, old_termios);
364 sierra_send_setup(port);
365 }
366
367 static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
368 {
369 struct usb_serial_port *port = tty->driver_data;
370 unsigned int value;
371 struct sierra_port_private *portdata;
372
373 dev_dbg(&port->dev, "%s\n", __func__);
374 portdata = usb_get_serial_port_data(port);
375
376 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
377 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
378 ((portdata->cts_state) ? TIOCM_CTS : 0) |
379 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
380 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
381 ((portdata->ri_state) ? TIOCM_RNG : 0);
382
383 return value;
384 }
385
386 static int sierra_tiocmset(struct tty_struct *tty, struct file *file,
387 unsigned int set, unsigned int clear)
388 {
389 struct usb_serial_port *port = tty->driver_data;
390 struct sierra_port_private *portdata;
391
392 portdata = usb_get_serial_port_data(port);
393
394 if (set & TIOCM_RTS)
395 portdata->rts_state = 1;
396 if (set & TIOCM_DTR)
397 portdata->dtr_state = 1;
398
399 if (clear & TIOCM_RTS)
400 portdata->rts_state = 0;
401 if (clear & TIOCM_DTR)
402 portdata->dtr_state = 0;
403 return sierra_send_setup(port);
404 }
405
406 static void sierra_release_urb(struct urb *urb)
407 {
408 struct usb_serial_port *port;
409 if (urb) {
410 port = urb->context;
411 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
412 kfree(urb->transfer_buffer);
413 usb_free_urb(urb);
414 }
415 }
416
417 static void sierra_outdat_callback(struct urb *urb)
418 {
419 struct usb_serial_port *port = urb->context;
420 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
421 struct sierra_intf_private *intfdata;
422 int status = urb->status;
423
424 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
425 intfdata = port->serial->private;
426
427 /* free up the transfer buffer, as usb_free_urb() does not do this */
428 kfree(urb->transfer_buffer);
429 usb_autopm_put_interface_async(port->serial->interface);
430 if (status)
431 dev_dbg(&port->dev, "%s - nonzero write bulk status "
432 "received: %d\n", __func__, status);
433
434 spin_lock(&portdata->lock);
435 --portdata->outstanding_urbs;
436 spin_unlock(&portdata->lock);
437 spin_lock(&intfdata->susp_lock);
438 --intfdata->in_flight;
439 spin_unlock(&intfdata->susp_lock);
440
441 usb_serial_port_softint(port);
442 }
443
444 /* Write */
445 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
446 const unsigned char *buf, int count)
447 {
448 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
449 struct sierra_intf_private *intfdata;
450 struct usb_serial *serial = port->serial;
451 unsigned long flags;
452 unsigned char *buffer;
453 struct urb *urb;
454 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
455 int retval = 0;
456
457 /* verify that we actually have some data to write */
458 if (count == 0)
459 return 0;
460
461 portdata = usb_get_serial_port_data(port);
462 intfdata = serial->private;
463
464 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
465 spin_lock_irqsave(&portdata->lock, flags);
466 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
467 portdata->outstanding_urbs);
468 if (portdata->outstanding_urbs > N_OUT_URB) {
469 spin_unlock_irqrestore(&portdata->lock, flags);
470 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
471 return 0;
472 }
473 portdata->outstanding_urbs++;
474 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
475 portdata->outstanding_urbs);
476 spin_unlock_irqrestore(&portdata->lock, flags);
477
478 retval = usb_autopm_get_interface_async(serial->interface);
479 if (retval < 0) {
480 spin_lock_irqsave(&portdata->lock, flags);
481 portdata->outstanding_urbs--;
482 spin_unlock_irqrestore(&portdata->lock, flags);
483 goto error_simple;
484 }
485
486 buffer = kmalloc(writesize, GFP_ATOMIC);
487 if (!buffer) {
488 dev_err(&port->dev, "out of memory\n");
489 retval = -ENOMEM;
490 goto error_no_buffer;
491 }
492
493 urb = usb_alloc_urb(0, GFP_ATOMIC);
494 if (!urb) {
495 dev_err(&port->dev, "no more free urbs\n");
496 retval = -ENOMEM;
497 goto error_no_urb;
498 }
499
500 memcpy(buffer, buf, writesize);
501
502 usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer);
503
504 usb_fill_bulk_urb(urb, serial->dev,
505 usb_sndbulkpipe(serial->dev,
506 port->bulk_out_endpointAddress),
507 buffer, writesize, sierra_outdat_callback, port);
508
509 /* Handle the need to send a zero length packet */
510 urb->transfer_flags |= URB_ZERO_PACKET;
511
512 spin_lock_irqsave(&intfdata->susp_lock, flags);
513
514 if (intfdata->suspended) {
515 usb_anchor_urb(urb, &portdata->delayed);
516 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
517 goto skip_power;
518 } else {
519 usb_anchor_urb(urb, &portdata->active);
520 }
521 /* send it down the pipe */
522 retval = usb_submit_urb(urb, GFP_ATOMIC);
523 if (retval) {
524 usb_unanchor_urb(urb);
525 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
526 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
527 "with status = %d\n", __func__, retval);
528 goto error;
529 } else {
530 intfdata->in_flight++;
531 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
532 }
533
534 skip_power:
535 /* we are done with this urb, so let the host driver
536 * really free it when it is finished with it */
537 usb_free_urb(urb);
538
539 return writesize;
540 error:
541 usb_free_urb(urb);
542 error_no_urb:
543 kfree(buffer);
544 error_no_buffer:
545 spin_lock_irqsave(&portdata->lock, flags);
546 --portdata->outstanding_urbs;
547 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
548 portdata->outstanding_urbs);
549 spin_unlock_irqrestore(&portdata->lock, flags);
550 usb_autopm_put_interface_async(serial->interface);
551 error_simple:
552 return retval;
553 }
554
555 static void sierra_indat_callback(struct urb *urb)
556 {
557 int err;
558 int endpoint;
559 struct usb_serial_port *port;
560 struct tty_struct *tty;
561 unsigned char *data = urb->transfer_buffer;
562 int status = urb->status;
563
564 endpoint = usb_pipeendpoint(urb->pipe);
565 port = urb->context;
566
567 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
568
569 if (status) {
570 dev_dbg(&port->dev, "%s: nonzero status: %d on"
571 " endpoint %02x\n", __func__, status, endpoint);
572 } else {
573 if (urb->actual_length) {
574 tty = tty_port_tty_get(&port->port);
575 if (tty) {
576 tty_buffer_request_room(tty,
577 urb->actual_length);
578 tty_insert_flip_string(tty, data,
579 urb->actual_length);
580 tty_flip_buffer_push(tty);
581
582 tty_kref_put(tty);
583 usb_serial_debug_data(debug, &port->dev,
584 __func__, urb->actual_length, data);
585 }
586 } else {
587 dev_dbg(&port->dev, "%s: empty read urb"
588 " received\n", __func__);
589 }
590 }
591
592 /* Resubmit urb so we continue receiving */
593 if (port->port.count && status != -ESHUTDOWN && status != -EPERM) {
594 usb_mark_last_busy(port->serial->dev);
595 err = usb_submit_urb(urb, GFP_ATOMIC);
596 if (err)
597 dev_err(&port->dev, "resubmit read urb failed."
598 "(%d)\n", err);
599 }
600
601 return;
602 }
603
604 static void sierra_instat_callback(struct urb *urb)
605 {
606 int err;
607 int status = urb->status;
608 struct usb_serial_port *port = urb->context;
609 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
610 struct usb_serial *serial = port->serial;
611
612 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
613 urb, port, portdata);
614
615 if (status == 0) {
616 struct usb_ctrlrequest *req_pkt =
617 (struct usb_ctrlrequest *)urb->transfer_buffer;
618
619 if (!req_pkt) {
620 dev_dbg(&port->dev, "%s: NULL req_pkt\n",
621 __func__);
622 return;
623 }
624 if ((req_pkt->bRequestType == 0xA1) &&
625 (req_pkt->bRequest == 0x20)) {
626 int old_dcd_state;
627 unsigned char signals = *((unsigned char *)
628 urb->transfer_buffer +
629 sizeof(struct usb_ctrlrequest));
630 struct tty_struct *tty;
631
632 dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
633 signals);
634
635 old_dcd_state = portdata->dcd_state;
636 portdata->cts_state = 1;
637 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
638 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
639 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
640
641 tty = tty_port_tty_get(&port->port);
642 if (tty && !C_CLOCAL(tty) &&
643 old_dcd_state && !portdata->dcd_state)
644 tty_hangup(tty);
645 tty_kref_put(tty);
646 } else {
647 dev_dbg(&port->dev, "%s: type %x req %x\n",
648 __func__, req_pkt->bRequestType,
649 req_pkt->bRequest);
650 }
651 } else
652 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
653
654 /* Resubmit urb so we continue receiving IRQ data */
655 if (port->port.count && status != -ESHUTDOWN && status != -ENOENT) {
656 usb_mark_last_busy(serial->dev);
657 urb->dev = serial->dev;
658 err = usb_submit_urb(urb, GFP_ATOMIC);
659 if (err)
660 dev_err(&port->dev, "%s: resubmit intr urb "
661 "failed. (%d)\n", __func__, err);
662 }
663 }
664
665 static int sierra_write_room(struct tty_struct *tty)
666 {
667 struct usb_serial_port *port = tty->driver_data;
668 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
669 unsigned long flags;
670
671 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
672
673 /* try to give a good number back based on if we have any free urbs at
674 * this point in time */
675 spin_lock_irqsave(&portdata->lock, flags);
676 if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) {
677 spin_unlock_irqrestore(&portdata->lock, flags);
678 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
679 return 0;
680 }
681 spin_unlock_irqrestore(&portdata->lock, flags);
682
683 return 2048;
684 }
685
686 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
687 {
688 int i;
689 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
690
691 for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++)
692 usb_kill_urb(portdata->in_urbs[i]);
693
694 usb_kill_urb(port->interrupt_in_urb);
695 }
696
697 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
698 {
699 int ok_cnt;
700 int err = -EINVAL;
701 int i;
702 struct urb *urb;
703 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
704
705 ok_cnt = 0;
706 for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++) {
707 urb = portdata->in_urbs[i];
708 if (!urb)
709 continue;
710 err = usb_submit_urb(urb, mem_flags);
711 if (err) {
712 dev_err(&port->dev, "%s: submit urb failed: %d\n",
713 __func__, err);
714 } else {
715 ok_cnt++;
716 }
717 }
718
719 if (ok_cnt && port->interrupt_in_urb) {
720 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
721 if (err) {
722 dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
723 __func__, err);
724 }
725 }
726
727 if (ok_cnt > 0) /* at least one rx urb submitted */
728 return 0;
729 else
730 return err;
731 }
732
733 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
734 int dir, void *ctx, int len,
735 gfp_t mem_flags,
736 usb_complete_t callback)
737 {
738 struct urb *urb;
739 u8 *buf;
740
741 if (endpoint == -1)
742 return NULL;
743
744 urb = usb_alloc_urb(0, mem_flags);
745 if (urb == NULL) {
746 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
747 __func__, endpoint);
748 return NULL;
749 }
750
751 buf = kmalloc(len, mem_flags);
752 if (buf) {
753 /* Fill URB using supplied data */
754 usb_fill_bulk_urb(urb, serial->dev,
755 usb_sndbulkpipe(serial->dev, endpoint) | dir,
756 buf, len, callback, ctx);
757
758 /* debug */
759 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
760 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
761 } else {
762 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
763 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
764
765 sierra_release_urb(urb);
766 urb = NULL;
767 }
768
769 return urb;
770 }
771
772 static void sierra_close(struct usb_serial_port *port)
773 {
774 int i;
775 struct usb_serial *serial = port->serial;
776 struct sierra_port_private *portdata;
777 struct sierra_intf_private *intfdata = port->serial->private;
778
779
780 dev_dbg(&port->dev, "%s\n", __func__);
781 portdata = usb_get_serial_port_data(port);
782
783 portdata->rts_state = 0;
784 portdata->dtr_state = 0;
785
786 if (serial->dev) {
787 mutex_lock(&serial->disc_mutex);
788 if (!serial->disconnected) {
789 serial->interface->needs_remote_wakeup = 0;
790 usb_autopm_get_interface(serial->interface);
791 sierra_send_setup(port);
792 }
793 mutex_unlock(&serial->disc_mutex);
794 spin_lock_irq(&intfdata->susp_lock);
795 portdata->opened = 0;
796 spin_unlock_irq(&intfdata->susp_lock);
797
798
799 /* Stop reading urbs */
800 sierra_stop_rx_urbs(port);
801 /* .. and release them */
802 for (i = 0; i < N_IN_URB; i++) {
803 sierra_release_urb(portdata->in_urbs[i]);
804 portdata->in_urbs[i] = NULL;
805 }
806 }
807 }
808
809 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
810 {
811 struct sierra_port_private *portdata;
812 struct usb_serial *serial = port->serial;
813 struct sierra_intf_private *intfdata = serial->private;
814 int i;
815 int err;
816 int endpoint;
817 struct urb *urb;
818
819 portdata = usb_get_serial_port_data(port);
820
821 dev_dbg(&port->dev, "%s\n", __func__);
822
823 /* Set some sane defaults */
824 portdata->rts_state = 1;
825 portdata->dtr_state = 1;
826
827
828 endpoint = port->bulk_in_endpointAddress;
829 for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++) {
830 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
831 IN_BUFLEN, GFP_KERNEL,
832 sierra_indat_callback);
833 portdata->in_urbs[i] = urb;
834 }
835 /* clear halt condition */
836 usb_clear_halt(serial->dev,
837 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
838
839 err = sierra_submit_rx_urbs(port, GFP_KERNEL);
840 if (err) {
841 /* get rid of everything as in close */
842 sierra_close(port);
843 /* restore balance for autopm */
844 usb_autopm_put_interface(serial->interface);
845 return err;
846 }
847 sierra_send_setup(port);
848
849 serial->interface->needs_remote_wakeup = 1;
850 spin_lock_irq(&intfdata->susp_lock);
851 portdata->opened = 1;
852 spin_unlock_irq(&intfdata->susp_lock);
853 usb_autopm_put_interface(serial->interface);
854
855 return 0;
856 }
857
858
859 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
860 {
861 struct usb_serial *serial = port->serial;
862 struct sierra_port_private *portdata;
863
864 portdata = usb_get_serial_port_data(port);
865 portdata->rts_state = on;
866 portdata->dtr_state = on;
867
868 if (serial->dev) {
869 mutex_lock(&serial->disc_mutex);
870 if (!serial->disconnected)
871 sierra_send_setup(port);
872 mutex_unlock(&serial->disc_mutex);
873 }
874 }
875
876 static int sierra_startup(struct usb_serial *serial)
877 {
878 struct usb_serial_port *port;
879 struct sierra_port_private *portdata;
880 int i;
881
882 dev_dbg(&serial->dev->dev, "%s\n", __func__);
883
884 /* Set Device mode to D0 */
885 sierra_set_power_state(serial->dev, 0x0000);
886
887 /* Check NMEA and set */
888 if (nmea)
889 sierra_vsc_set_nmea(serial->dev, 1);
890
891 /* Now setup per port private data */
892 for (i = 0; i < serial->num_ports; i++) {
893 port = serial->port[i];
894 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
895 if (!portdata) {
896 dev_dbg(&port->dev, "%s: kmalloc for "
897 "sierra_port_private (%d) failed!.\n",
898 __func__, i);
899 return -ENOMEM;
900 }
901 spin_lock_init(&portdata->lock);
902 init_usb_anchor(&portdata->active);
903 init_usb_anchor(&portdata->delayed);
904 /* Set the port private data pointer */
905 usb_set_serial_port_data(port, portdata);
906 }
907
908 return 0;
909 }
910
911 static void sierra_release(struct usb_serial *serial)
912 {
913 int i;
914 struct usb_serial_port *port;
915 struct sierra_port_private *portdata;
916
917 dev_dbg(&serial->dev->dev, "%s\n", __func__);
918
919 for (i = 0; i < serial->num_ports; ++i) {
920 port = serial->port[i];
921 if (!port)
922 continue;
923 portdata = usb_get_serial_port_data(port);
924 if (!portdata)
925 continue;
926 kfree(portdata);
927 }
928 }
929
930 #ifdef CONFIG_PM
931 static void stop_read_write_urbs(struct usb_serial *serial)
932 {
933 int i;
934 struct usb_serial_port *port;
935 struct sierra_port_private *portdata;
936
937 /* Stop reading/writing urbs */
938 for (i = 0; i < serial->num_ports; ++i) {
939 port = serial->port[i];
940 portdata = usb_get_serial_port_data(port);
941 sierra_stop_rx_urbs(port);
942 usb_kill_anchored_urbs(&portdata->active);
943 }
944 }
945
946 static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
947 {
948 struct sierra_intf_private *intfdata;
949 int b;
950
951 if (serial->dev->auto_pm) {
952 intfdata = serial->private;
953 spin_lock_irq(&intfdata->susp_lock);
954 b = intfdata->in_flight;
955
956 if (b) {
957 spin_unlock_irq(&intfdata->susp_lock);
958 return -EBUSY;
959 } else {
960 intfdata->suspended = 1;
961 spin_unlock_irq(&intfdata->susp_lock);
962 }
963 }
964 stop_read_write_urbs(serial);
965
966 return 0;
967 }
968
969 static int sierra_resume(struct usb_serial *serial)
970 {
971 struct usb_serial_port *port;
972 struct sierra_intf_private *intfdata = serial->private;
973 struct sierra_port_private *portdata;
974 struct urb *urb;
975 int ec = 0;
976 int i, err;
977
978 spin_lock_irq(&intfdata->susp_lock);
979 for (i = 0; i < serial->num_ports; i++) {
980 port = serial->port[i];
981 portdata = usb_get_serial_port_data(port);
982
983 while ((urb = usb_get_from_anchor(&portdata->delayed))) {
984 usb_anchor_urb(urb, &portdata->active);
985 intfdata->in_flight++;
986 err = usb_submit_urb(urb, GFP_ATOMIC);
987 if (err < 0) {
988 intfdata->in_flight--;
989 usb_unanchor_urb(urb);
990 usb_scuttle_anchored_urbs(&portdata->delayed);
991 break;
992 }
993 }
994
995 if (portdata->opened) {
996 err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
997 if (err)
998 ec++;
999 }
1000 }
1001 intfdata->suspended = 0;
1002 spin_unlock_irq(&intfdata->susp_lock);
1003
1004 return ec ? -EIO : 0;
1005 }
1006 #else
1007 #define sierra_suspend NULL
1008 #define sierra_resume NULL
1009 #endif
1010
1011 static struct usb_serial_driver sierra_device = {
1012 .driver = {
1013 .owner = THIS_MODULE,
1014 .name = "sierra",
1015 },
1016 .description = "Sierra USB modem",
1017 .id_table = id_table,
1018 .usb_driver = &sierra_driver,
1019 .calc_num_ports = sierra_calc_num_ports,
1020 .probe = sierra_probe,
1021 .open = sierra_open,
1022 .close = sierra_close,
1023 .dtr_rts = sierra_dtr_rts,
1024 .write = sierra_write,
1025 .write_room = sierra_write_room,
1026 .set_termios = sierra_set_termios,
1027 .tiocmget = sierra_tiocmget,
1028 .tiocmset = sierra_tiocmset,
1029 .attach = sierra_startup,
1030 .release = sierra_release,
1031 .suspend = sierra_suspend,
1032 .resume = sierra_resume,
1033 .read_int_callback = sierra_instat_callback,
1034 };
1035
1036 /* Functions used by new usb-serial code. */
1037 static int __init sierra_init(void)
1038 {
1039 int retval;
1040 retval = usb_serial_register(&sierra_device);
1041 if (retval)
1042 goto failed_device_register;
1043
1044
1045 retval = usb_register(&sierra_driver);
1046 if (retval)
1047 goto failed_driver_register;
1048
1049 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1050 DRIVER_DESC "\n");
1051
1052 return 0;
1053
1054 failed_driver_register:
1055 usb_serial_deregister(&sierra_device);
1056 failed_device_register:
1057 return retval;
1058 }
1059
1060 static void __exit sierra_exit(void)
1061 {
1062 usb_deregister(&sierra_driver);
1063 usb_serial_deregister(&sierra_device);
1064 }
1065
1066 module_init(sierra_init);
1067 module_exit(sierra_exit);
1068
1069 MODULE_AUTHOR(DRIVER_AUTHOR);
1070 MODULE_DESCRIPTION(DRIVER_DESC);
1071 MODULE_VERSION(DRIVER_VERSION);
1072 MODULE_LICENSE("GPL");
1073
1074 module_param(nmea, bool, S_IRUGO | S_IWUSR);
1075 MODULE_PARM_DESC(nmea, "NMEA streaming");
1076
1077 module_param(debug, bool, S_IRUGO | S_IWUSR);
1078 MODULE_PARM_DESC(debug, "Debug messages");
Linux MOXA ART SoC ARM port