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perf python: Do not force closing original perf descriptor in evlist.get_pollfd()
[linux/fpc-iii.git] / drivers / usb / serial / sierra.c
bloba43263a0edd88e2e61521907ae6baff55b2af32d
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 /* 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 unsigned int open_ports;
59 };
60
61 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
62 {
63 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
64 SWIMS_USB_REQUEST_SetPower, /* __u8 request */
65 USB_TYPE_VENDOR, /* __u8 request type */
66 swiState, /* __u16 value */
67 0, /* __u16 index */
68 NULL, /* void *data */
69 0, /* __u16 size */
70 USB_CTRL_SET_TIMEOUT); /* int timeout */
71 }
72
73 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
74 {
75 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
76 SWIMS_USB_REQUEST_SetNmea, /* __u8 request */
77 USB_TYPE_VENDOR, /* __u8 request type */
78 enable, /* __u16 value */
79 0x0000, /* __u16 index */
80 NULL, /* void *data */
81 0, /* __u16 size */
82 USB_CTRL_SET_TIMEOUT); /* int timeout */
83 }
84
85 static int sierra_calc_num_ports(struct usb_serial *serial,
86 struct usb_serial_endpoints *epds)
87 {
88 int num_ports = 0;
89 u8 ifnum, numendpoints;
90
91 ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
92 numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
93
94 /* Dummy interface present on some SKUs should be ignored */
95 if (ifnum == 0x99)
96 num_ports = 0;
97 else if (numendpoints <= 3)
98 num_ports = 1;
99 else
100 num_ports = (numendpoints-1)/2;
101 return num_ports;
102 }
103
104 static int is_blacklisted(const u8 ifnum,
105 const struct sierra_iface_info *blacklist)
106 {
107 const u8 *info;
108 int i;
109
110 if (blacklist) {
111 info = blacklist->ifaceinfo;
112
113 for (i = 0; i < blacklist->infolen; i++) {
114 if (info[i] == ifnum)
115 return 1;
116 }
117 }
118 return 0;
119 }
120
121 static int is_himemory(const u8 ifnum,
122 const struct sierra_iface_info *himemorylist)
123 {
124 const u8 *info;
125 int i;
126
127 if (himemorylist) {
128 info = himemorylist->ifaceinfo;
129
130 for (i=0; i < himemorylist->infolen; i++) {
131 if (info[i] == ifnum)
132 return 1;
133 }
134 }
135 return 0;
136 }
137
138 static u8 sierra_interface_num(struct usb_serial *serial)
139 {
140 return serial->interface->cur_altsetting->desc.bInterfaceNumber;
141 }
142
143 static int sierra_probe(struct usb_serial *serial,
144 const struct usb_device_id *id)
145 {
146 int result = 0;
147 struct usb_device *udev;
148 u8 ifnum;
149
150 udev = serial->dev;
151 ifnum = sierra_interface_num(serial);
152
153 /*
154 * If this interface supports more than 1 alternate
155 * select the 2nd one
156 */
157 if (serial->interface->num_altsetting == 2) {
158 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
159 ifnum);
160 /* We know the alternate setting is 1 for the MC8785 */
161 usb_set_interface(udev, ifnum, 1);
162 }
163
164 if (is_blacklisted(ifnum,
165 (struct sierra_iface_info *)id->driver_info)) {
166 dev_dbg(&serial->dev->dev,
167 "Ignoring blacklisted interface #%d\n", ifnum);
168 return -ENODEV;
169 }
170
171 return result;
172 }
173
174 /* interfaces with higher memory requirements */
175 static const u8 hi_memory_typeA_ifaces[] = { 0, 2 };
176 static const struct sierra_iface_info typeA_interface_list = {
177 .infolen = ARRAY_SIZE(hi_memory_typeA_ifaces),
178 .ifaceinfo = hi_memory_typeA_ifaces,
179 };
180
181 static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 };
182 static const struct sierra_iface_info typeB_interface_list = {
183 .infolen = ARRAY_SIZE(hi_memory_typeB_ifaces),
184 .ifaceinfo = hi_memory_typeB_ifaces,
185 };
186
187 /* 'blacklist' of interfaces not served by this driver */
188 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11, 19, 20 };
189 static const struct sierra_iface_info direct_ip_interface_blacklist = {
190 .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces),
191 .ifaceinfo = direct_ip_non_serial_ifaces,
192 };
193
194 static const struct usb_device_id id_table[] = {
195 { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
196 { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
197 { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */
198 { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
199
200 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
201 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
202 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
203 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
204 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
205 { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
206 { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
207 { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
208 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
209 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
210 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
211 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
212 { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U */
213 /* Sierra Wireless C597 */
214 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
215 /* Sierra Wireless T598 */
216 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
217 { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
218 { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
219 { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
220 { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */
221
222 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
223 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
224 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
225 { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
226 { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
227 { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
228 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
229 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
230 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
231 { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
232 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
233 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
234 { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
235 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
236 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
237 { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
238 { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
239 { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
240 { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
241 { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
242 { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
243 /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
244 { USB_DEVICE(0x1199, 0x683C) },
245 { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
246 /* Sierra Wireless MC8790, MC8791, MC8792 */
247 { USB_DEVICE(0x1199, 0x683E) },
248 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
249 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
250 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
251 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
252 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
253 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
254 { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
255 { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
256 /* Sierra Wireless C885 */
257 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
258 /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
259 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
260 /* Sierra Wireless C22/C33 */
261 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
262 /* Sierra Wireless HSPA Non-Composite Device */
263 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
264 { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
265 /* Sierra Wireless Direct IP modems */
266 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x68A3, 0xFF, 0xFF, 0xFF),
267 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
268 },
269 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x68AA, 0xFF, 0xFF, 0xFF),
270 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
271 },
272 { USB_DEVICE(0x1199, 0x68AB) }, /* Sierra Wireless AR8550 */
273 /* AT&T Direct IP LTE modems */
274 { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68AA, 0xFF, 0xFF, 0xFF),
275 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
276 },
277 /* Airprime/Sierra Wireless Direct IP modems */
278 { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68A3, 0xFF, 0xFF, 0xFF),
279 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
280 },
281
282 { }
283 };
284 MODULE_DEVICE_TABLE(usb, id_table);
285
286
287 struct sierra_port_private {
288 spinlock_t lock; /* lock the structure */
289 int outstanding_urbs; /* number of out urbs in flight */
290 struct usb_anchor active;
291 struct usb_anchor delayed;
292
293 int num_out_urbs;
294 int num_in_urbs;
295 /* Input endpoints and buffers for this port */
296 struct urb *in_urbs[N_IN_URB_HM];
297
298 /* Settings for the port */
299 int rts_state; /* Handshaking pins (outputs) */
300 int dtr_state;
301 int cts_state; /* Handshaking pins (inputs) */
302 int dsr_state;
303 int dcd_state;
304 int ri_state;
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 portdata = usb_get_serial_port_data(port);
317
318 if (portdata->dtr_state)
319 val |= 0x01;
320 if (portdata->rts_state)
321 val |= 0x02;
322
323 /* If composite device then properly report interface */
324 if (serial->num_ports == 1) {
325 interface = sierra_interface_num(serial);
326 /* Control message is sent only to interfaces with
327 * interrupt_in endpoints
328 */
329 if (port->interrupt_in_urb) {
330 /* send control message */
331 do_send = 1;
332 }
333 }
334
335 /* Otherwise the need to do non-composite mapping */
336 else {
337 if (port->bulk_out_endpointAddress == 2)
338 interface = 0;
339 else if (port->bulk_out_endpointAddress == 4)
340 interface = 1;
341 else if (port->bulk_out_endpointAddress == 5)
342 interface = 2;
343
344 do_send = 1;
345 }
346 if (!do_send)
347 return 0;
348
349 retval = usb_autopm_get_interface(serial->interface);
350 if (retval < 0)
351 return retval;
352
353 retval = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
354 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
355 usb_autopm_put_interface(serial->interface);
356
357 return retval;
358 }
359
360 static int sierra_tiocmget(struct tty_struct *tty)
361 {
362 struct usb_serial_port *port = tty->driver_data;
363 unsigned int value;
364 struct sierra_port_private *portdata;
365
366 portdata = usb_get_serial_port_data(port);
367
368 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
369 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
370 ((portdata->cts_state) ? TIOCM_CTS : 0) |
371 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
372 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
373 ((portdata->ri_state) ? TIOCM_RNG : 0);
374
375 return value;
376 }
377
378 static int sierra_tiocmset(struct tty_struct *tty,
379 unsigned int set, unsigned int clear)
380 {
381 struct usb_serial_port *port = tty->driver_data;
382 struct sierra_port_private *portdata;
383
384 portdata = usb_get_serial_port_data(port);
385
386 if (set & TIOCM_RTS)
387 portdata->rts_state = 1;
388 if (set & TIOCM_DTR)
389 portdata->dtr_state = 1;
390
391 if (clear & TIOCM_RTS)
392 portdata->rts_state = 0;
393 if (clear & TIOCM_DTR)
394 portdata->dtr_state = 0;
395 return sierra_send_setup(port);
396 }
397
398 static void sierra_release_urb(struct urb *urb)
399 {
400 if (urb) {
401 kfree(urb->transfer_buffer);
402 usb_free_urb(urb);
403 }
404 }
405
406 static void sierra_outdat_callback(struct urb *urb)
407 {
408 struct usb_serial_port *port = urb->context;
409 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
410 struct sierra_intf_private *intfdata;
411 int status = urb->status;
412 unsigned long flags;
413
414 intfdata = usb_get_serial_data(port->serial);
415
416 /* free up the transfer buffer, as usb_free_urb() does not do this */
417 kfree(urb->transfer_buffer);
418 usb_autopm_put_interface_async(port->serial->interface);
419 if (status)
420 dev_dbg(&port->dev, "%s - nonzero write bulk status "
421 "received: %d\n", __func__, status);
422
423 spin_lock_irqsave(&portdata->lock, flags);
424 --portdata->outstanding_urbs;
425 spin_unlock_irqrestore(&portdata->lock, flags);
426 spin_lock_irqsave(&intfdata->susp_lock, flags);
427 --intfdata->in_flight;
428 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
429
430 usb_serial_port_softint(port);
431 }
432
433 /* Write */
434 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
435 const unsigned char *buf, int count)
436 {
437 struct sierra_port_private *portdata;
438 struct sierra_intf_private *intfdata;
439 struct usb_serial *serial = port->serial;
440 unsigned long flags;
441 unsigned char *buffer;
442 struct urb *urb;
443 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
444 int retval = 0;
445
446 /* verify that we actually have some data to write */
447 if (count == 0)
448 return 0;
449
450 portdata = usb_get_serial_port_data(port);
451 intfdata = usb_get_serial_data(serial);
452
453 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
454 spin_lock_irqsave(&portdata->lock, flags);
455 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
456 portdata->outstanding_urbs);
457 if (portdata->outstanding_urbs > portdata->num_out_urbs) {
458 spin_unlock_irqrestore(&portdata->lock, flags);
459 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
460 return 0;
461 }
462 portdata->outstanding_urbs++;
463 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
464 portdata->outstanding_urbs);
465 spin_unlock_irqrestore(&portdata->lock, flags);
466
467 retval = usb_autopm_get_interface_async(serial->interface);
468 if (retval < 0) {
469 spin_lock_irqsave(&portdata->lock, flags);
470 portdata->outstanding_urbs--;
471 spin_unlock_irqrestore(&portdata->lock, flags);
472 goto error_simple;
473 }
474
475 buffer = kmalloc(writesize, GFP_ATOMIC);
476 if (!buffer) {
477 retval = -ENOMEM;
478 goto error_no_buffer;
479 }
480
481 urb = usb_alloc_urb(0, GFP_ATOMIC);
482 if (!urb) {
483 retval = -ENOMEM;
484 goto error_no_urb;
485 }
486
487 memcpy(buffer, buf, writesize);
488
489 usb_serial_debug_data(&port->dev, __func__, writesize, buffer);
490
491 usb_fill_bulk_urb(urb, serial->dev,
492 usb_sndbulkpipe(serial->dev,
493 port->bulk_out_endpointAddress),
494 buffer, writesize, sierra_outdat_callback, port);
495
496 /* Handle the need to send a zero length packet */
497 urb->transfer_flags |= URB_ZERO_PACKET;
498
499 spin_lock_irqsave(&intfdata->susp_lock, flags);
500
501 if (intfdata->suspended) {
502 usb_anchor_urb(urb, &portdata->delayed);
503 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
504 goto skip_power;
505 } else {
506 usb_anchor_urb(urb, &portdata->active);
507 }
508 /* send it down the pipe */
509 retval = usb_submit_urb(urb, GFP_ATOMIC);
510 if (retval) {
511 usb_unanchor_urb(urb);
512 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
513 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
514 "with status = %d\n", __func__, retval);
515 goto error;
516 } else {
517 intfdata->in_flight++;
518 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
519 }
520
521 skip_power:
522 /* we are done with this urb, so let the host driver
523 * really free it when it is finished with it */
524 usb_free_urb(urb);
525
526 return writesize;
527 error:
528 usb_free_urb(urb);
529 error_no_urb:
530 kfree(buffer);
531 error_no_buffer:
532 spin_lock_irqsave(&portdata->lock, flags);
533 --portdata->outstanding_urbs;
534 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
535 portdata->outstanding_urbs);
536 spin_unlock_irqrestore(&portdata->lock, flags);
537 usb_autopm_put_interface_async(serial->interface);
538 error_simple:
539 return retval;
540 }
541
542 static void sierra_indat_callback(struct urb *urb)
543 {
544 int err;
545 int endpoint;
546 struct usb_serial_port *port;
547 unsigned char *data = urb->transfer_buffer;
548 int status = urb->status;
549
550 endpoint = usb_pipeendpoint(urb->pipe);
551 port = urb->context;
552
553 if (status) {
554 dev_dbg(&port->dev, "%s: nonzero status: %d on"
555 " endpoint %02x\n", __func__, status, endpoint);
556 } else {
557 if (urb->actual_length) {
558 tty_insert_flip_string(&port->port, data,
559 urb->actual_length);
560 tty_flip_buffer_push(&port->port);
561
562 usb_serial_debug_data(&port->dev, __func__,
563 urb->actual_length, data);
564 } else {
565 dev_dbg(&port->dev, "%s: empty read urb"
566 " received\n", __func__);
567 }
568 }
569
570 /* Resubmit urb so we continue receiving */
571 if (status != -ESHUTDOWN && status != -EPERM) {
572 usb_mark_last_busy(port->serial->dev);
573 err = usb_submit_urb(urb, GFP_ATOMIC);
574 if (err && err != -EPERM)
575 dev_err(&port->dev, "resubmit read urb failed."
576 "(%d)\n", err);
577 }
578 }
579
580 static void sierra_instat_callback(struct urb *urb)
581 {
582 int err;
583 int status = urb->status;
584 struct usb_serial_port *port = urb->context;
585 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
586 struct usb_serial *serial = port->serial;
587
588 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
589 urb, port, portdata);
590
591 if (status == 0) {
592 struct usb_ctrlrequest *req_pkt =
593 (struct usb_ctrlrequest *)urb->transfer_buffer;
594
595 if (!req_pkt) {
596 dev_dbg(&port->dev, "%s: NULL req_pkt\n",
597 __func__);
598 return;
599 }
600 if ((req_pkt->bRequestType == 0xA1) &&
601 (req_pkt->bRequest == 0x20)) {
602 int old_dcd_state;
603 unsigned char signals = *((unsigned char *)
604 urb->transfer_buffer +
605 sizeof(struct usb_ctrlrequest));
606
607 dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
608 signals);
609
610 old_dcd_state = portdata->dcd_state;
611 portdata->cts_state = 1;
612 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
613 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
614 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
615
616 if (old_dcd_state && !portdata->dcd_state)
617 tty_port_tty_hangup(&port->port, true);
618 } else {
619 dev_dbg(&port->dev, "%s: type %x req %x\n",
620 __func__, req_pkt->bRequestType,
621 req_pkt->bRequest);
622 }
623 } else
624 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
625
626 /* Resubmit urb so we continue receiving IRQ data */
627 if (status != -ESHUTDOWN && status != -ENOENT) {
628 usb_mark_last_busy(serial->dev);
629 err = usb_submit_urb(urb, GFP_ATOMIC);
630 if (err && err != -EPERM)
631 dev_err(&port->dev, "%s: resubmit intr urb "
632 "failed. (%d)\n", __func__, err);
633 }
634 }
635
636 static int sierra_write_room(struct tty_struct *tty)
637 {
638 struct usb_serial_port *port = tty->driver_data;
639 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
640 unsigned long flags;
641
642 /* try to give a good number back based on if we have any free urbs at
643 * this point in time */
644 spin_lock_irqsave(&portdata->lock, flags);
645 if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) {
646 spin_unlock_irqrestore(&portdata->lock, flags);
647 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
648 return 0;
649 }
650 spin_unlock_irqrestore(&portdata->lock, flags);
651
652 return 2048;
653 }
654
655 static int sierra_chars_in_buffer(struct tty_struct *tty)
656 {
657 struct usb_serial_port *port = tty->driver_data;
658 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
659 unsigned long flags;
660 int chars;
661
662 /* NOTE: This overcounts somewhat. */
663 spin_lock_irqsave(&portdata->lock, flags);
664 chars = portdata->outstanding_urbs * MAX_TRANSFER;
665 spin_unlock_irqrestore(&portdata->lock, flags);
666
667 dev_dbg(&port->dev, "%s - %d\n", __func__, chars);
668
669 return chars;
670 }
671
672 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
673 {
674 int i;
675 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
676
677 for (i = 0; i < portdata->num_in_urbs; i++)
678 usb_kill_urb(portdata->in_urbs[i]);
679
680 usb_kill_urb(port->interrupt_in_urb);
681 }
682
683 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
684 {
685 int ok_cnt;
686 int err = -EINVAL;
687 int i;
688 struct urb *urb;
689 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
690
691 ok_cnt = 0;
692 for (i = 0; i < portdata->num_in_urbs; i++) {
693 urb = portdata->in_urbs[i];
694 if (!urb)
695 continue;
696 err = usb_submit_urb(urb, mem_flags);
697 if (err) {
698 dev_err(&port->dev, "%s: submit urb failed: %d\n",
699 __func__, err);
700 } else {
701 ok_cnt++;
702 }
703 }
704
705 if (ok_cnt && port->interrupt_in_urb) {
706 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
707 if (err) {
708 dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
709 __func__, err);
710 }
711 }
712
713 if (ok_cnt > 0) /* at least one rx urb submitted */
714 return 0;
715 else
716 return err;
717 }
718
719 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
720 int dir, void *ctx, int len,
721 gfp_t mem_flags,
722 usb_complete_t callback)
723 {
724 struct urb *urb;
725 u8 *buf;
726
727 urb = usb_alloc_urb(0, mem_flags);
728 if (!urb)
729 return NULL;
730
731 buf = kmalloc(len, mem_flags);
732 if (buf) {
733 /* Fill URB using supplied data */
734 usb_fill_bulk_urb(urb, serial->dev,
735 usb_sndbulkpipe(serial->dev, endpoint) | dir,
736 buf, len, callback, ctx);
737
738 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
739 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
740 } else {
741 sierra_release_urb(urb);
742 urb = NULL;
743 }
744
745 return urb;
746 }
747
748 static void sierra_close(struct usb_serial_port *port)
749 {
750 int i;
751 struct usb_serial *serial = port->serial;
752 struct sierra_port_private *portdata;
753 struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
754 struct urb *urb;
755
756 portdata = usb_get_serial_port_data(port);
757
758 /*
759 * Need to take susp_lock to make sure port is not already being
760 * resumed, but no need to hold it due to initialized
761 */
762 spin_lock_irq(&intfdata->susp_lock);
763 if (--intfdata->open_ports == 0)
764 serial->interface->needs_remote_wakeup = 0;
765 spin_unlock_irq(&intfdata->susp_lock);
766
767 for (;;) {
768 urb = usb_get_from_anchor(&portdata->delayed);
769 if (!urb)
770 break;
771 kfree(urb->transfer_buffer);
772 usb_free_urb(urb);
773 usb_autopm_put_interface_async(serial->interface);
774 spin_lock_irq(&portdata->lock);
775 portdata->outstanding_urbs--;
776 spin_unlock_irq(&portdata->lock);
777 }
778
779 sierra_stop_rx_urbs(port);
780 usb_kill_anchored_urbs(&portdata->active);
781
782 for (i = 0; i < portdata->num_in_urbs; i++) {
783 sierra_release_urb(portdata->in_urbs[i]);
784 portdata->in_urbs[i] = NULL;
785 }
786
787 usb_autopm_get_interface_no_resume(serial->interface);
788 }
789
790 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
791 {
792 struct sierra_port_private *portdata;
793 struct usb_serial *serial = port->serial;
794 struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
795 int i;
796 int err;
797 int endpoint;
798 struct urb *urb;
799
800 portdata = usb_get_serial_port_data(port);
801
802 endpoint = port->bulk_in_endpointAddress;
803 for (i = 0; i < portdata->num_in_urbs; i++) {
804 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
805 IN_BUFLEN, GFP_KERNEL,
806 sierra_indat_callback);
807 portdata->in_urbs[i] = urb;
808 }
809 /* clear halt condition */
810 usb_clear_halt(serial->dev,
811 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
812
813 err = sierra_submit_rx_urbs(port, GFP_KERNEL);
814 if (err)
815 goto err_submit;
816
817 spin_lock_irq(&intfdata->susp_lock);
818 if (++intfdata->open_ports == 1)
819 serial->interface->needs_remote_wakeup = 1;
820 spin_unlock_irq(&intfdata->susp_lock);
821 usb_autopm_put_interface(serial->interface);
822
823 return 0;
824
825 err_submit:
826 sierra_stop_rx_urbs(port);
827
828 for (i = 0; i < portdata->num_in_urbs; i++) {
829 sierra_release_urb(portdata->in_urbs[i]);
830 portdata->in_urbs[i] = NULL;
831 }
832
833 return err;
834 }
835
836
837 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
838 {
839 struct sierra_port_private *portdata;
840
841 portdata = usb_get_serial_port_data(port);
842 portdata->rts_state = on;
843 portdata->dtr_state = on;
844
845 sierra_send_setup(port);
846 }
847
848 static int sierra_startup(struct usb_serial *serial)
849 {
850 struct sierra_intf_private *intfdata;
851
852 intfdata = kzalloc(sizeof(*intfdata), GFP_KERNEL);
853 if (!intfdata)
854 return -ENOMEM;
855
856 spin_lock_init(&intfdata->susp_lock);
857
858 usb_set_serial_data(serial, intfdata);
859
860 /* Set Device mode to D0 */
861 sierra_set_power_state(serial->dev, 0x0000);
862
863 /* Check NMEA and set */
864 if (nmea)
865 sierra_vsc_set_nmea(serial->dev, 1);
866
867 return 0;
868 }
869
870 static void sierra_release(struct usb_serial *serial)
871 {
872 struct sierra_intf_private *intfdata;
873
874 intfdata = usb_get_serial_data(serial);
875 kfree(intfdata);
876 }
877
878 static int sierra_port_probe(struct usb_serial_port *port)
879 {
880 struct usb_serial *serial = port->serial;
881 struct sierra_port_private *portdata;
882 const struct sierra_iface_info *himemoryp;
883 u8 ifnum;
884
885 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
886 if (!portdata)
887 return -ENOMEM;
888
889 spin_lock_init(&portdata->lock);
890 init_usb_anchor(&portdata->active);
891 init_usb_anchor(&portdata->delayed);
892
893 /* Assume low memory requirements */
894 portdata->num_out_urbs = N_OUT_URB;
895 portdata->num_in_urbs = N_IN_URB;
896
897 /* Determine actual memory requirements */
898 if (serial->num_ports == 1) {
899 /* Get interface number for composite device */
900 ifnum = sierra_interface_num(serial);
901 himemoryp = &typeB_interface_list;
902 } else {
903 /* This is really the usb-serial port number of the interface
904 * rather than the interface number.
905 */
906 ifnum = port->port_number;
907 himemoryp = &typeA_interface_list;
908 }
909
910 if (is_himemory(ifnum, himemoryp)) {
911 portdata->num_out_urbs = N_OUT_URB_HM;
912 portdata->num_in_urbs = N_IN_URB_HM;
913 }
914
915 dev_dbg(&port->dev,
916 "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
917 ifnum, portdata->num_in_urbs, portdata->num_out_urbs);
918
919 usb_set_serial_port_data(port, portdata);
920
921 return 0;
922 }
923
924 static int sierra_port_remove(struct usb_serial_port *port)
925 {
926 struct sierra_port_private *portdata;
927
928 portdata = usb_get_serial_port_data(port);
929 usb_set_serial_port_data(port, NULL);
930 kfree(portdata);
931
932 return 0;
933 }
934
935 #ifdef CONFIG_PM
936 static void stop_read_write_urbs(struct usb_serial *serial)
937 {
938 int i;
939 struct usb_serial_port *port;
940 struct sierra_port_private *portdata;
941
942 /* Stop reading/writing urbs */
943 for (i = 0; i < serial->num_ports; ++i) {
944 port = serial->port[i];
945 portdata = usb_get_serial_port_data(port);
946 if (!portdata)
947 continue;
948 sierra_stop_rx_urbs(port);
949 usb_kill_anchored_urbs(&portdata->active);
950 }
951 }
952
953 static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
954 {
955 struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
956
957 spin_lock_irq(&intfdata->susp_lock);
958 if (PMSG_IS_AUTO(message)) {
959 if (intfdata->in_flight) {
960 spin_unlock_irq(&intfdata->susp_lock);
961 return -EBUSY;
962 }
963 }
964 intfdata->suspended = 1;
965 spin_unlock_irq(&intfdata->susp_lock);
966
967 stop_read_write_urbs(serial);
968
969 return 0;
970 }
971
972 /* Caller must hold susp_lock. */
973 static int sierra_submit_delayed_urbs(struct usb_serial_port *port)
974 {
975 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
976 struct sierra_intf_private *intfdata;
977 struct urb *urb;
978 int ec = 0;
979 int err;
980
981 intfdata = usb_get_serial_data(port->serial);
982
983 for (;;) {
984 urb = usb_get_from_anchor(&portdata->delayed);
985 if (!urb)
986 break;
987
988 usb_anchor_urb(urb, &portdata->active);
989 intfdata->in_flight++;
990 err = usb_submit_urb(urb, GFP_ATOMIC);
991 if (err) {
992 dev_err(&port->dev, "%s - submit urb failed: %d",
993 __func__, err);
994 ec++;
995 intfdata->in_flight--;
996 usb_unanchor_urb(urb);
997 kfree(urb->transfer_buffer);
998 usb_free_urb(urb);
999
1000 spin_lock(&portdata->lock);
1001 portdata->outstanding_urbs--;
1002 spin_unlock(&portdata->lock);
1003 }
1004 }
1005
1006 if (ec)
1007 return -EIO;
1008
1009 return 0;
1010 }
1011
1012 static int sierra_resume(struct usb_serial *serial)
1013 {
1014 struct usb_serial_port *port;
1015 struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
1016 int ec = 0;
1017 int i, err;
1018
1019 spin_lock_irq(&intfdata->susp_lock);
1020 for (i = 0; i < serial->num_ports; i++) {
1021 port = serial->port[i];
1022
1023 if (!tty_port_initialized(&port->port))
1024 continue;
1025
1026 err = sierra_submit_delayed_urbs(port);
1027 if (err)
1028 ec++;
1029
1030 err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1031 if (err)
1032 ec++;
1033 }
1034 intfdata->suspended = 0;
1035 spin_unlock_irq(&intfdata->susp_lock);
1036
1037 return ec ? -EIO : 0;
1038 }
1039
1040 #else
1041 #define sierra_suspend NULL
1042 #define sierra_resume NULL
1043 #endif
1044
1045 static struct usb_serial_driver sierra_device = {
1046 .driver = {
1047 .owner = THIS_MODULE,
1048 .name = "sierra",
1049 },
1050 .description = "Sierra USB modem",
1051 .id_table = id_table,
1052 .calc_num_ports = sierra_calc_num_ports,
1053 .probe = sierra_probe,
1054 .open = sierra_open,
1055 .close = sierra_close,
1056 .dtr_rts = sierra_dtr_rts,
1057 .write = sierra_write,
1058 .write_room = sierra_write_room,
1059 .chars_in_buffer = sierra_chars_in_buffer,
1060 .tiocmget = sierra_tiocmget,
1061 .tiocmset = sierra_tiocmset,
1062 .attach = sierra_startup,
1063 .release = sierra_release,
1064 .port_probe = sierra_port_probe,
1065 .port_remove = sierra_port_remove,
1066 .suspend = sierra_suspend,
1067 .resume = sierra_resume,
1068 .read_int_callback = sierra_instat_callback,
1069 };
1070
1071 static struct usb_serial_driver * const serial_drivers[] = {
1072 &sierra_device, NULL
1073 };
1074
1075 module_usb_serial_driver(serial_drivers, id_table);
1076
1077 MODULE_AUTHOR(DRIVER_AUTHOR);
1078 MODULE_DESCRIPTION(DRIVER_DESC);
1079 MODULE_LICENSE("GPL v2");
1080
1081 module_param(nmea, bool, S_IRUGO | S_IWUSR);
1082 MODULE_PARM_DESC(nmea, "NMEA streaming");
Linux with added FPC-III support