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Merge tag 'regmap-fix-v5.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux/fpc-iii.git] / drivers / usb / serial / sierra.c
blob57fc3c31712e5aa288859d6098c8f91c53a8745b
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 USB Driver for Sierra Wireless
4
5 Copyright (C) 2006, 2007, 2008 Kevin Lloyd <klloyd@sierrawireless.com>,
6
7 Copyright (C) 2008, 2009 Elina Pasheva, Matthew Safar, Rory Filer
8 <linux@sierrawireless.com>
9
10 IMPORTANT DISCLAIMER: This driver is not commercially supported by
11 Sierra Wireless. Use at your own risk.
12
13 Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
14 Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
15 */
16 /* Uncomment to log function calls */
17 /* #define DEBUG */
18
19 #define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer"
20 #define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
21
22 #include <linux/kernel.h>
23 #include <linux/jiffies.h>
24 #include <linux/errno.h>
25 #include <linux/tty.h>
26 #include <linux/slab.h>
27 #include <linux/tty_flip.h>
28 #include <linux/module.h>
29 #include <linux/usb.h>
30 #include <linux/usb/serial.h>
31
32 #define SWIMS_USB_REQUEST_SetPower 0x00
33 #define SWIMS_USB_REQUEST_SetNmea 0x07
34
35 #define N_IN_URB_HM 8
36 #define N_OUT_URB_HM 64
37 #define N_IN_URB 4
38 #define N_OUT_URB 4
39 #define IN_BUFLEN 4096
40
41 #define MAX_TRANSFER (PAGE_SIZE - 512)
42 /* MAX_TRANSFER is chosen so that the VM is not stressed by
43 allocations > PAGE_SIZE and the number of packets in a page
44 is an integer 512 is the largest possible packet on EHCI */
45
46 static bool nmea;
47
48 struct sierra_iface_list {
49 const u8 *nums; /* array of interface numbers */
50 size_t count; /* number of elements in array */
51 };
52
53 struct sierra_intf_private {
54 spinlock_t susp_lock;
55 unsigned int suspended:1;
56 int in_flight;
57 unsigned int open_ports;
58 };
59
60 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
61 {
62 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
63 SWIMS_USB_REQUEST_SetPower, /* __u8 request */
64 USB_TYPE_VENDOR, /* __u8 request type */
65 swiState, /* __u16 value */
66 0, /* __u16 index */
67 NULL, /* void *data */
68 0, /* __u16 size */
69 USB_CTRL_SET_TIMEOUT); /* int timeout */
70 }
71
72 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
73 {
74 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
75 SWIMS_USB_REQUEST_SetNmea, /* __u8 request */
76 USB_TYPE_VENDOR, /* __u8 request type */
77 enable, /* __u16 value */
78 0x0000, /* __u16 index */
79 NULL, /* void *data */
80 0, /* __u16 size */
81 USB_CTRL_SET_TIMEOUT); /* int timeout */
82 }
83
84 static int sierra_calc_num_ports(struct usb_serial *serial,
85 struct usb_serial_endpoints *epds)
86 {
87 int num_ports = 0;
88 u8 ifnum, numendpoints;
89
90 ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
91 numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
92
93 /* Dummy interface present on some SKUs should be ignored */
94 if (ifnum == 0x99)
95 num_ports = 0;
96 else if (numendpoints <= 3)
97 num_ports = 1;
98 else
99 num_ports = (numendpoints-1)/2;
100 return num_ports;
101 }
102
103 static bool is_listed(const u8 ifnum, const struct sierra_iface_list *list)
104 {
105 int i;
106
107 if (!list)
108 return false;
109
110 for (i = 0; i < list->count; i++) {
111 if (list->nums[i] == ifnum)
112 return true;
113 }
114
115 return false;
116 }
117
118 static u8 sierra_interface_num(struct usb_serial *serial)
119 {
120 return serial->interface->cur_altsetting->desc.bInterfaceNumber;
121 }
122
123 static int sierra_probe(struct usb_serial *serial,
124 const struct usb_device_id *id)
125 {
126 const struct sierra_iface_list *ignore_list;
127 int result = 0;
128 struct usb_device *udev;
129 u8 ifnum;
130
131 udev = serial->dev;
132 ifnum = sierra_interface_num(serial);
133
134 /*
135 * If this interface supports more than 1 alternate
136 * select the 2nd one
137 */
138 if (serial->interface->num_altsetting == 2) {
139 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
140 ifnum);
141 /* We know the alternate setting is 1 for the MC8785 */
142 usb_set_interface(udev, ifnum, 1);
143 }
144
145 ignore_list = (const struct sierra_iface_list *)id->driver_info;
146
147 if (is_listed(ifnum, ignore_list)) {
148 dev_dbg(&serial->dev->dev, "Ignoring interface #%d\n", ifnum);
149 return -ENODEV;
150 }
151
152 return result;
153 }
154
155 /* interfaces with higher memory requirements */
156 static const u8 hi_memory_typeA_ifaces[] = { 0, 2 };
157 static const struct sierra_iface_list typeA_interface_list = {
158 .nums = hi_memory_typeA_ifaces,
159 .count = ARRAY_SIZE(hi_memory_typeA_ifaces),
160 };
161
162 static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 };
163 static const struct sierra_iface_list typeB_interface_list = {
164 .nums = hi_memory_typeB_ifaces,
165 .count = ARRAY_SIZE(hi_memory_typeB_ifaces),
166 };
167
168 /* 'ignorelist' of interfaces not served by this driver */
169 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11, 19, 20 };
170 static const struct sierra_iface_list direct_ip_interface_ignore = {
171 .nums = direct_ip_non_serial_ifaces,
172 .count = ARRAY_SIZE(direct_ip_non_serial_ifaces),
173 };
174
175 static const struct usb_device_id id_table[] = {
176 { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
177 { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
178 { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */
179 { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
180
181 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
182 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
183 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
184 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
185 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
186 { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
187 { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
188 { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
189 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
190 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
191 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
192 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
193 { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U */
194 /* Sierra Wireless C597 */
195 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
196 /* Sierra Wireless T598 */
197 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
198 { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
199 { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
200 { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
201 { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */
202
203 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
204 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
205 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
206 { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
207 { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
208 { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
209 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
210 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
211 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
212 { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
213 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
214 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
215 { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
216 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
217 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
218 { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
219 { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
220 { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
221 { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
222 { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
223 { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
224 /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
225 { USB_DEVICE(0x1199, 0x683C) },
226 { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
227 /* Sierra Wireless MC8790, MC8791, MC8792 */
228 { USB_DEVICE(0x1199, 0x683E) },
229 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
230 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
231 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
232 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
233 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
234 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
235 { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
236 { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
237 /* Sierra Wireless C885 */
238 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
239 /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
240 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
241 /* Sierra Wireless C22/C33 */
242 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
243 /* Sierra Wireless HSPA Non-Composite Device */
244 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
245 { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
246 /* Sierra Wireless Direct IP modems */
247 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x68A3, 0xFF, 0xFF, 0xFF),
248 .driver_info = (kernel_ulong_t)&direct_ip_interface_ignore
249 },
250 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x68AA, 0xFF, 0xFF, 0xFF),
251 .driver_info = (kernel_ulong_t)&direct_ip_interface_ignore
252 },
253 { USB_DEVICE(0x1199, 0x68AB) }, /* Sierra Wireless AR8550 */
254 /* AT&T Direct IP LTE modems */
255 { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68AA, 0xFF, 0xFF, 0xFF),
256 .driver_info = (kernel_ulong_t)&direct_ip_interface_ignore
257 },
258 /* Airprime/Sierra Wireless Direct IP modems */
259 { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68A3, 0xFF, 0xFF, 0xFF),
260 .driver_info = (kernel_ulong_t)&direct_ip_interface_ignore
261 },
262
263 { }
264 };
265 MODULE_DEVICE_TABLE(usb, id_table);
266
267
268 struct sierra_port_private {
269 spinlock_t lock; /* lock the structure */
270 int outstanding_urbs; /* number of out urbs in flight */
271 struct usb_anchor active;
272 struct usb_anchor delayed;
273
274 int num_out_urbs;
275 int num_in_urbs;
276 /* Input endpoints and buffers for this port */
277 struct urb *in_urbs[N_IN_URB_HM];
278
279 /* Settings for the port */
280 int rts_state; /* Handshaking pins (outputs) */
281 int dtr_state;
282 int cts_state; /* Handshaking pins (inputs) */
283 int dsr_state;
284 int dcd_state;
285 int ri_state;
286 };
287
288 static int sierra_send_setup(struct usb_serial_port *port)
289 {
290 struct usb_serial *serial = port->serial;
291 struct sierra_port_private *portdata;
292 __u16 interface = 0;
293 int val = 0;
294 int do_send = 0;
295 int retval;
296
297 portdata = usb_get_serial_port_data(port);
298
299 if (portdata->dtr_state)
300 val |= 0x01;
301 if (portdata->rts_state)
302 val |= 0x02;
303
304 /* If composite device then properly report interface */
305 if (serial->num_ports == 1) {
306 interface = sierra_interface_num(serial);
307 /* Control message is sent only to interfaces with
308 * interrupt_in endpoints
309 */
310 if (port->interrupt_in_urb) {
311 /* send control message */
312 do_send = 1;
313 }
314 }
315
316 /* Otherwise the need to do non-composite mapping */
317 else {
318 if (port->bulk_out_endpointAddress == 2)
319 interface = 0;
320 else if (port->bulk_out_endpointAddress == 4)
321 interface = 1;
322 else if (port->bulk_out_endpointAddress == 5)
323 interface = 2;
324
325 do_send = 1;
326 }
327 if (!do_send)
328 return 0;
329
330 retval = usb_autopm_get_interface(serial->interface);
331 if (retval < 0)
332 return retval;
333
334 retval = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
335 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
336 usb_autopm_put_interface(serial->interface);
337
338 return retval;
339 }
340
341 static int sierra_tiocmget(struct tty_struct *tty)
342 {
343 struct usb_serial_port *port = tty->driver_data;
344 unsigned int value;
345 struct sierra_port_private *portdata;
346
347 portdata = usb_get_serial_port_data(port);
348
349 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
350 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
351 ((portdata->cts_state) ? TIOCM_CTS : 0) |
352 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
353 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
354 ((portdata->ri_state) ? TIOCM_RNG : 0);
355
356 return value;
357 }
358
359 static int sierra_tiocmset(struct tty_struct *tty,
360 unsigned int set, unsigned int clear)
361 {
362 struct usb_serial_port *port = tty->driver_data;
363 struct sierra_port_private *portdata;
364
365 portdata = usb_get_serial_port_data(port);
366
367 if (set & TIOCM_RTS)
368 portdata->rts_state = 1;
369 if (set & TIOCM_DTR)
370 portdata->dtr_state = 1;
371
372 if (clear & TIOCM_RTS)
373 portdata->rts_state = 0;
374 if (clear & TIOCM_DTR)
375 portdata->dtr_state = 0;
376 return sierra_send_setup(port);
377 }
378
379 static void sierra_release_urb(struct urb *urb)
380 {
381 if (urb) {
382 kfree(urb->transfer_buffer);
383 usb_free_urb(urb);
384 }
385 }
386
387 static void sierra_outdat_callback(struct urb *urb)
388 {
389 struct usb_serial_port *port = urb->context;
390 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
391 struct sierra_intf_private *intfdata;
392 int status = urb->status;
393 unsigned long flags;
394
395 intfdata = usb_get_serial_data(port->serial);
396
397 /* free up the transfer buffer, as usb_free_urb() does not do this */
398 kfree(urb->transfer_buffer);
399 usb_autopm_put_interface_async(port->serial->interface);
400 if (status)
401 dev_dbg(&port->dev, "%s - nonzero write bulk status "
402 "received: %d\n", __func__, status);
403
404 spin_lock_irqsave(&portdata->lock, flags);
405 --portdata->outstanding_urbs;
406 spin_unlock_irqrestore(&portdata->lock, flags);
407 spin_lock_irqsave(&intfdata->susp_lock, flags);
408 --intfdata->in_flight;
409 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
410
411 usb_serial_port_softint(port);
412 }
413
414 /* Write */
415 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
416 const unsigned char *buf, int count)
417 {
418 struct sierra_port_private *portdata;
419 struct sierra_intf_private *intfdata;
420 struct usb_serial *serial = port->serial;
421 unsigned long flags;
422 unsigned char *buffer;
423 struct urb *urb;
424 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
425 int retval = 0;
426
427 /* verify that we actually have some data to write */
428 if (count == 0)
429 return 0;
430
431 portdata = usb_get_serial_port_data(port);
432 intfdata = usb_get_serial_data(serial);
433
434 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
435 spin_lock_irqsave(&portdata->lock, flags);
436 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
437 portdata->outstanding_urbs);
438 if (portdata->outstanding_urbs > portdata->num_out_urbs) {
439 spin_unlock_irqrestore(&portdata->lock, flags);
440 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
441 return 0;
442 }
443 portdata->outstanding_urbs++;
444 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
445 portdata->outstanding_urbs);
446 spin_unlock_irqrestore(&portdata->lock, flags);
447
448 retval = usb_autopm_get_interface_async(serial->interface);
449 if (retval < 0) {
450 spin_lock_irqsave(&portdata->lock, flags);
451 portdata->outstanding_urbs--;
452 spin_unlock_irqrestore(&portdata->lock, flags);
453 goto error_simple;
454 }
455
456 buffer = kmalloc(writesize, GFP_ATOMIC);
457 if (!buffer) {
458 retval = -ENOMEM;
459 goto error_no_buffer;
460 }
461
462 urb = usb_alloc_urb(0, GFP_ATOMIC);
463 if (!urb) {
464 retval = -ENOMEM;
465 goto error_no_urb;
466 }
467
468 memcpy(buffer, buf, writesize);
469
470 usb_serial_debug_data(&port->dev, __func__, writesize, buffer);
471
472 usb_fill_bulk_urb(urb, serial->dev,
473 usb_sndbulkpipe(serial->dev,
474 port->bulk_out_endpointAddress),
475 buffer, writesize, sierra_outdat_callback, port);
476
477 /* Handle the need to send a zero length packet */
478 urb->transfer_flags |= URB_ZERO_PACKET;
479
480 spin_lock_irqsave(&intfdata->susp_lock, flags);
481
482 if (intfdata->suspended) {
483 usb_anchor_urb(urb, &portdata->delayed);
484 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
485 goto skip_power;
486 } else {
487 usb_anchor_urb(urb, &portdata->active);
488 }
489 /* send it down the pipe */
490 retval = usb_submit_urb(urb, GFP_ATOMIC);
491 if (retval) {
492 usb_unanchor_urb(urb);
493 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
494 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
495 "with status = %d\n", __func__, retval);
496 goto error;
497 } else {
498 intfdata->in_flight++;
499 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
500 }
501
502 skip_power:
503 /* we are done with this urb, so let the host driver
504 * really free it when it is finished with it */
505 usb_free_urb(urb);
506
507 return writesize;
508 error:
509 usb_free_urb(urb);
510 error_no_urb:
511 kfree(buffer);
512 error_no_buffer:
513 spin_lock_irqsave(&portdata->lock, flags);
514 --portdata->outstanding_urbs;
515 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
516 portdata->outstanding_urbs);
517 spin_unlock_irqrestore(&portdata->lock, flags);
518 usb_autopm_put_interface_async(serial->interface);
519 error_simple:
520 return retval;
521 }
522
523 static void sierra_indat_callback(struct urb *urb)
524 {
525 int err;
526 int endpoint;
527 struct usb_serial_port *port;
528 unsigned char *data = urb->transfer_buffer;
529 int status = urb->status;
530
531 endpoint = usb_pipeendpoint(urb->pipe);
532 port = urb->context;
533
534 if (status) {
535 dev_dbg(&port->dev, "%s: nonzero status: %d on"
536 " endpoint %02x\n", __func__, status, endpoint);
537 } else {
538 if (urb->actual_length) {
539 tty_insert_flip_string(&port->port, data,
540 urb->actual_length);
541 tty_flip_buffer_push(&port->port);
542
543 usb_serial_debug_data(&port->dev, __func__,
544 urb->actual_length, data);
545 } else {
546 dev_dbg(&port->dev, "%s: empty read urb"
547 " received\n", __func__);
548 }
549 }
550
551 /* Resubmit urb so we continue receiving */
552 if (status != -ESHUTDOWN && status != -EPERM) {
553 usb_mark_last_busy(port->serial->dev);
554 err = usb_submit_urb(urb, GFP_ATOMIC);
555 if (err && err != -EPERM)
556 dev_err(&port->dev, "resubmit read urb failed."
557 "(%d)\n", err);
558 }
559 }
560
561 static void sierra_instat_callback(struct urb *urb)
562 {
563 int err;
564 int status = urb->status;
565 struct usb_serial_port *port = urb->context;
566 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
567 struct usb_serial *serial = port->serial;
568
569 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
570 urb, port, portdata);
571
572 if (status == 0) {
573 struct usb_ctrlrequest *req_pkt = urb->transfer_buffer;
574
575 if (!req_pkt) {
576 dev_dbg(&port->dev, "%s: NULL req_pkt\n",
577 __func__);
578 return;
579 }
580 if ((req_pkt->bRequestType == 0xA1) &&
581 (req_pkt->bRequest == 0x20)) {
582 int old_dcd_state;
583 unsigned char signals = *((unsigned char *)
584 urb->transfer_buffer +
585 sizeof(struct usb_ctrlrequest));
586
587 dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
588 signals);
589
590 old_dcd_state = portdata->dcd_state;
591 portdata->cts_state = 1;
592 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
593 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
594 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
595
596 if (old_dcd_state && !portdata->dcd_state)
597 tty_port_tty_hangup(&port->port, true);
598 } else {
599 dev_dbg(&port->dev, "%s: type %x req %x\n",
600 __func__, req_pkt->bRequestType,
601 req_pkt->bRequest);
602 }
603 } else
604 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
605
606 /* Resubmit urb so we continue receiving IRQ data */
607 if (status != -ESHUTDOWN && status != -ENOENT) {
608 usb_mark_last_busy(serial->dev);
609 err = usb_submit_urb(urb, GFP_ATOMIC);
610 if (err && err != -EPERM)
611 dev_err(&port->dev, "%s: resubmit intr urb "
612 "failed. (%d)\n", __func__, err);
613 }
614 }
615
616 static int sierra_write_room(struct tty_struct *tty)
617 {
618 struct usb_serial_port *port = tty->driver_data;
619 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
620 unsigned long flags;
621
622 /* try to give a good number back based on if we have any free urbs at
623 * this point in time */
624 spin_lock_irqsave(&portdata->lock, flags);
625 if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) {
626 spin_unlock_irqrestore(&portdata->lock, flags);
627 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
628 return 0;
629 }
630 spin_unlock_irqrestore(&portdata->lock, flags);
631
632 return 2048;
633 }
634
635 static int sierra_chars_in_buffer(struct tty_struct *tty)
636 {
637 struct usb_serial_port *port = tty->driver_data;
638 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
639 unsigned long flags;
640 int chars;
641
642 /* NOTE: This overcounts somewhat. */
643 spin_lock_irqsave(&portdata->lock, flags);
644 chars = portdata->outstanding_urbs * MAX_TRANSFER;
645 spin_unlock_irqrestore(&portdata->lock, flags);
646
647 dev_dbg(&port->dev, "%s - %d\n", __func__, chars);
648
649 return chars;
650 }
651
652 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
653 {
654 int i;
655 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
656
657 for (i = 0; i < portdata->num_in_urbs; i++)
658 usb_kill_urb(portdata->in_urbs[i]);
659
660 usb_kill_urb(port->interrupt_in_urb);
661 }
662
663 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
664 {
665 int ok_cnt;
666 int err = -EINVAL;
667 int i;
668 struct urb *urb;
669 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
670
671 ok_cnt = 0;
672 for (i = 0; i < portdata->num_in_urbs; i++) {
673 urb = portdata->in_urbs[i];
674 if (!urb)
675 continue;
676 err = usb_submit_urb(urb, mem_flags);
677 if (err) {
678 dev_err(&port->dev, "%s: submit urb failed: %d\n",
679 __func__, err);
680 } else {
681 ok_cnt++;
682 }
683 }
684
685 if (ok_cnt && port->interrupt_in_urb) {
686 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
687 if (err) {
688 dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
689 __func__, err);
690 }
691 }
692
693 if (ok_cnt > 0) /* at least one rx urb submitted */
694 return 0;
695 else
696 return err;
697 }
698
699 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
700 int dir, void *ctx, int len,
701 gfp_t mem_flags,
702 usb_complete_t callback)
703 {
704 struct urb *urb;
705 u8 *buf;
706
707 urb = usb_alloc_urb(0, mem_flags);
708 if (!urb)
709 return NULL;
710
711 buf = kmalloc(len, mem_flags);
712 if (buf) {
713 /* Fill URB using supplied data */
714 usb_fill_bulk_urb(urb, serial->dev,
715 usb_sndbulkpipe(serial->dev, endpoint) | dir,
716 buf, len, callback, ctx);
717
718 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
719 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
720 } else {
721 sierra_release_urb(urb);
722 urb = NULL;
723 }
724
725 return urb;
726 }
727
728 static void sierra_close(struct usb_serial_port *port)
729 {
730 int i;
731 struct usb_serial *serial = port->serial;
732 struct sierra_port_private *portdata;
733 struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
734 struct urb *urb;
735
736 portdata = usb_get_serial_port_data(port);
737
738 /*
739 * Need to take susp_lock to make sure port is not already being
740 * resumed, but no need to hold it due to initialized
741 */
742 spin_lock_irq(&intfdata->susp_lock);
743 if (--intfdata->open_ports == 0)
744 serial->interface->needs_remote_wakeup = 0;
745 spin_unlock_irq(&intfdata->susp_lock);
746
747 for (;;) {
748 urb = usb_get_from_anchor(&portdata->delayed);
749 if (!urb)
750 break;
751 kfree(urb->transfer_buffer);
752 usb_free_urb(urb);
753 usb_autopm_put_interface_async(serial->interface);
754 spin_lock_irq(&portdata->lock);
755 portdata->outstanding_urbs--;
756 spin_unlock_irq(&portdata->lock);
757 }
758
759 sierra_stop_rx_urbs(port);
760 usb_kill_anchored_urbs(&portdata->active);
761
762 for (i = 0; i < portdata->num_in_urbs; i++) {
763 sierra_release_urb(portdata->in_urbs[i]);
764 portdata->in_urbs[i] = NULL;
765 }
766
767 usb_autopm_get_interface_no_resume(serial->interface);
768 }
769
770 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
771 {
772 struct sierra_port_private *portdata;
773 struct usb_serial *serial = port->serial;
774 struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
775 int i;
776 int err;
777 int endpoint;
778 struct urb *urb;
779
780 portdata = usb_get_serial_port_data(port);
781
782 endpoint = port->bulk_in_endpointAddress;
783 for (i = 0; i < portdata->num_in_urbs; i++) {
784 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
785 IN_BUFLEN, GFP_KERNEL,
786 sierra_indat_callback);
787 portdata->in_urbs[i] = urb;
788 }
789 /* clear halt condition */
790 usb_clear_halt(serial->dev,
791 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
792
793 err = sierra_submit_rx_urbs(port, GFP_KERNEL);
794 if (err)
795 goto err_submit;
796
797 spin_lock_irq(&intfdata->susp_lock);
798 if (++intfdata->open_ports == 1)
799 serial->interface->needs_remote_wakeup = 1;
800 spin_unlock_irq(&intfdata->susp_lock);
801 usb_autopm_put_interface(serial->interface);
802
803 return 0;
804
805 err_submit:
806 sierra_stop_rx_urbs(port);
807
808 for (i = 0; i < portdata->num_in_urbs; i++) {
809 sierra_release_urb(portdata->in_urbs[i]);
810 portdata->in_urbs[i] = NULL;
811 }
812
813 return err;
814 }
815
816
817 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
818 {
819 struct sierra_port_private *portdata;
820
821 portdata = usb_get_serial_port_data(port);
822 portdata->rts_state = on;
823 portdata->dtr_state = on;
824
825 sierra_send_setup(port);
826 }
827
828 static int sierra_startup(struct usb_serial *serial)
829 {
830 struct sierra_intf_private *intfdata;
831
832 intfdata = kzalloc(sizeof(*intfdata), GFP_KERNEL);
833 if (!intfdata)
834 return -ENOMEM;
835
836 spin_lock_init(&intfdata->susp_lock);
837
838 usb_set_serial_data(serial, intfdata);
839
840 /* Set Device mode to D0 */
841 sierra_set_power_state(serial->dev, 0x0000);
842
843 /* Check NMEA and set */
844 if (nmea)
845 sierra_vsc_set_nmea(serial->dev, 1);
846
847 return 0;
848 }
849
850 static void sierra_release(struct usb_serial *serial)
851 {
852 struct sierra_intf_private *intfdata;
853
854 intfdata = usb_get_serial_data(serial);
855 kfree(intfdata);
856 }
857
858 static int sierra_port_probe(struct usb_serial_port *port)
859 {
860 struct usb_serial *serial = port->serial;
861 struct sierra_port_private *portdata;
862 const struct sierra_iface_list *himemory_list;
863 u8 ifnum;
864
865 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
866 if (!portdata)
867 return -ENOMEM;
868
869 spin_lock_init(&portdata->lock);
870 init_usb_anchor(&portdata->active);
871 init_usb_anchor(&portdata->delayed);
872
873 /* Assume low memory requirements */
874 portdata->num_out_urbs = N_OUT_URB;
875 portdata->num_in_urbs = N_IN_URB;
876
877 /* Determine actual memory requirements */
878 if (serial->num_ports == 1) {
879 /* Get interface number for composite device */
880 ifnum = sierra_interface_num(serial);
881 himemory_list = &typeB_interface_list;
882 } else {
883 /* This is really the usb-serial port number of the interface
884 * rather than the interface number.
885 */
886 ifnum = port->port_number;
887 himemory_list = &typeA_interface_list;
888 }
889
890 if (is_listed(ifnum, himemory_list)) {
891 portdata->num_out_urbs = N_OUT_URB_HM;
892 portdata->num_in_urbs = N_IN_URB_HM;
893 }
894
895 dev_dbg(&port->dev,
896 "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
897 ifnum, portdata->num_in_urbs, portdata->num_out_urbs);
898
899 usb_set_serial_port_data(port, portdata);
900
901 return 0;
902 }
903
904 static int sierra_port_remove(struct usb_serial_port *port)
905 {
906 struct sierra_port_private *portdata;
907
908 portdata = usb_get_serial_port_data(port);
909 usb_set_serial_port_data(port, NULL);
910 kfree(portdata);
911
912 return 0;
913 }
914
915 #ifdef CONFIG_PM
916 static void stop_read_write_urbs(struct usb_serial *serial)
917 {
918 int i;
919 struct usb_serial_port *port;
920 struct sierra_port_private *portdata;
921
922 /* Stop reading/writing urbs */
923 for (i = 0; i < serial->num_ports; ++i) {
924 port = serial->port[i];
925 portdata = usb_get_serial_port_data(port);
926 if (!portdata)
927 continue;
928 sierra_stop_rx_urbs(port);
929 usb_kill_anchored_urbs(&portdata->active);
930 }
931 }
932
933 static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
934 {
935 struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
936
937 spin_lock_irq(&intfdata->susp_lock);
938 if (PMSG_IS_AUTO(message)) {
939 if (intfdata->in_flight) {
940 spin_unlock_irq(&intfdata->susp_lock);
941 return -EBUSY;
942 }
943 }
944 intfdata->suspended = 1;
945 spin_unlock_irq(&intfdata->susp_lock);
946
947 stop_read_write_urbs(serial);
948
949 return 0;
950 }
951
952 /* Caller must hold susp_lock. */
953 static int sierra_submit_delayed_urbs(struct usb_serial_port *port)
954 {
955 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
956 struct sierra_intf_private *intfdata;
957 struct urb *urb;
958 int ec = 0;
959 int err;
960
961 intfdata = usb_get_serial_data(port->serial);
962
963 for (;;) {
964 urb = usb_get_from_anchor(&portdata->delayed);
965 if (!urb)
966 break;
967
968 usb_anchor_urb(urb, &portdata->active);
969 intfdata->in_flight++;
970 err = usb_submit_urb(urb, GFP_ATOMIC);
971 if (err) {
972 dev_err(&port->dev, "%s - submit urb failed: %d",
973 __func__, err);
974 ec++;
975 intfdata->in_flight--;
976 usb_unanchor_urb(urb);
977 kfree(urb->transfer_buffer);
978 usb_free_urb(urb);
979
980 spin_lock(&portdata->lock);
981 portdata->outstanding_urbs--;
982 spin_unlock(&portdata->lock);
983 }
984 }
985
986 if (ec)
987 return -EIO;
988
989 return 0;
990 }
991
992 static int sierra_resume(struct usb_serial *serial)
993 {
994 struct usb_serial_port *port;
995 struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
996 int ec = 0;
997 int i, err;
998
999 spin_lock_irq(&intfdata->susp_lock);
1000 for (i = 0; i < serial->num_ports; i++) {
1001 port = serial->port[i];
1002
1003 if (!tty_port_initialized(&port->port))
1004 continue;
1005
1006 err = sierra_submit_delayed_urbs(port);
1007 if (err)
1008 ec++;
1009
1010 err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1011 if (err)
1012 ec++;
1013 }
1014 intfdata->suspended = 0;
1015 spin_unlock_irq(&intfdata->susp_lock);
1016
1017 return ec ? -EIO : 0;
1018 }
1019
1020 #else
1021 #define sierra_suspend NULL
1022 #define sierra_resume NULL
1023 #endif
1024
1025 static struct usb_serial_driver sierra_device = {
1026 .driver = {
1027 .owner = THIS_MODULE,
1028 .name = "sierra",
1029 },
1030 .description = "Sierra USB modem",
1031 .id_table = id_table,
1032 .calc_num_ports = sierra_calc_num_ports,
1033 .probe = sierra_probe,
1034 .open = sierra_open,
1035 .close = sierra_close,
1036 .dtr_rts = sierra_dtr_rts,
1037 .write = sierra_write,
1038 .write_room = sierra_write_room,
1039 .chars_in_buffer = sierra_chars_in_buffer,
1040 .tiocmget = sierra_tiocmget,
1041 .tiocmset = sierra_tiocmset,
1042 .attach = sierra_startup,
1043 .release = sierra_release,
1044 .port_probe = sierra_port_probe,
1045 .port_remove = sierra_port_remove,
1046 .suspend = sierra_suspend,
1047 .resume = sierra_resume,
1048 .read_int_callback = sierra_instat_callback,
1049 };
1050
1051 static struct usb_serial_driver * const serial_drivers[] = {
1052 &sierra_device, NULL
1053 };
1054
1055 module_usb_serial_driver(serial_drivers, id_table);
1056
1057 MODULE_AUTHOR(DRIVER_AUTHOR);
1058 MODULE_DESCRIPTION(DRIVER_DESC);
1059 MODULE_LICENSE("GPL v2");
1060
1061 module_param(nmea, bool, S_IRUGO | S_IWUSR);
1062 MODULE_PARM_DESC(nmea, "NMEA streaming");
Linux with added FPC-III support