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+ drivers-usb-serial-sierrac-fix-printk-warning.patch added to -mm tree
[linux-2.6/mini2440.git] / drivers / usb / serial / sierra.c
bloba88cde950161bfdce7030d2503efb057a27c71cb
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.1.3.7"
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 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
55 {
56 int result;
57 dev_dbg(&udev->dev, "%s\n", __func__);
58 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
59 SWIMS_USB_REQUEST_SetPower, /* __u8 request */
60 USB_TYPE_VENDOR, /* __u8 request type */
61 swiState, /* __u16 value */
62 0, /* __u16 index */
63 NULL, /* void *data */
64 0, /* __u16 size */
65 USB_CTRL_SET_TIMEOUT); /* int timeout */
66 return result;
67 }
68
69 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
70 {
71 int result;
72 dev_dbg(&udev->dev, "%s\n", __func__);
73 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
74 SWIMS_USB_REQUEST_SetNmea, /* __u8 request */
75 USB_TYPE_VENDOR, /* __u8 request type */
76 enable, /* __u16 value */
77 0x0000, /* __u16 index */
78 NULL, /* void *data */
79 0, /* __u16 size */
80 USB_CTRL_SET_TIMEOUT); /* int timeout */
81 return result;
82 }
83
84 static int sierra_calc_num_ports(struct usb_serial *serial)
85 {
86 int num_ports = 0;
87 u8 ifnum, numendpoints;
88
89 dev_dbg(&serial->dev->dev, "%s\n", __func__);
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 sierra_calc_interface(struct usb_serial *serial)
122 {
123 int interface;
124 struct usb_interface *p_interface;
125 struct usb_host_interface *p_host_interface;
126 dev_dbg(&serial->dev->dev, "%s\n", __func__);
127
128 /* Get the interface structure pointer from the serial struct */
129 p_interface = serial->interface;
130
131 /* Get a pointer to the host interface structure */
132 p_host_interface = p_interface->cur_altsetting;
133
134 /* read the interface descriptor for this active altsetting
135 * to find out the interface number we are on
136 */
137 interface = p_host_interface->desc.bInterfaceNumber;
138
139 return interface;
140 }
141
142 static int sierra_probe(struct usb_serial *serial,
143 const struct usb_device_id *id)
144 {
145 int result = 0;
146 struct usb_device *udev;
147 u8 ifnum;
148
149 udev = serial->dev;
150 dev_dbg(&udev->dev, "%s\n", __func__);
151
152 ifnum = sierra_calc_interface(serial);
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 /* ifnum could have changed - by calling usb_set_interface */
165 ifnum = sierra_calc_interface(serial);
166
167 if (is_blacklisted(ifnum,
168 (struct sierra_iface_info *)id->driver_info)) {
169 dev_dbg(&serial->dev->dev,
170 "Ignoring blacklisted interface #%d\n", ifnum);
171 return -ENODEV;
172 }
173
174 return result;
175 }
176
177 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11 };
178 static const struct sierra_iface_info direct_ip_interface_blacklist = {
179 .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces),
180 .ifaceinfo = direct_ip_non_serial_ifaces,
181 };
182
183 static struct usb_device_id id_table [] = {
184 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
185 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
186 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
187 { USB_DEVICE(0x03f0, 0x1b1d) }, /* HP ev2200 a.k.a MC5720 */
188 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
189 { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
190 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
191 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
192 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
193 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
194 /* Sierra Wireless C597 */
195 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
196 /* Sierra Wireless Device */
197 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
198 { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless Device */
199 { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless Device */
200 { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless Device */
201
202 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
203 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
204 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
205 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
206 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 (Lenovo) */
207 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
208 { USB_DEVICE(0x03f0, 0x1e1d) }, /* HP hs2300 a.k.a MC8775 */
209 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
210 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
211 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
212 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
213 { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
214 { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
215 /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
216 { USB_DEVICE(0x1199, 0x683C) },
217 { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
218 /* Sierra Wireless MC8790, MC8791, MC8792 */
219 { USB_DEVICE(0x1199, 0x683E) },
220 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
221 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
222 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
223 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
224 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
225 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
226 { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
227 { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
228 /* Sierra Wireless C885 */
229 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
230 /* Sierra Wireless Device */
231 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
232 /* Sierra Wireless Device */
233 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
234 /* Sierra Wireless Device */
235 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
236
237 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
238 { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
239
240 { USB_DEVICE(0x1199, 0x68A3), /* Sierra Wireless Direct IP modems */
241 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
242 },
243
244 { }
245 };
246 MODULE_DEVICE_TABLE(usb, id_table);
247
248 static struct usb_driver sierra_driver = {
249 .name = "sierra",
250 .probe = usb_serial_probe,
251 .disconnect = usb_serial_disconnect,
252 .id_table = id_table,
253 .no_dynamic_id = 1,
254 };
255
256 struct sierra_port_private {
257 spinlock_t lock; /* lock the structure */
258 int outstanding_urbs; /* number of out urbs in flight */
259
260 /* Input endpoints and buffers for this port */
261 struct urb *in_urbs[N_IN_URB];
262
263 /* Settings for the port */
264 int rts_state; /* Handshaking pins (outputs) */
265 int dtr_state;
266 int cts_state; /* Handshaking pins (inputs) */
267 int dsr_state;
268 int dcd_state;
269 int ri_state;
270 };
271
272 static int sierra_send_setup(struct usb_serial_port *port)
273 {
274 struct usb_serial *serial = port->serial;
275 struct sierra_port_private *portdata;
276 __u16 interface = 0;
277 int val = 0;
278
279 dev_dbg(&port->dev, "%s\n", __func__);
280
281 portdata = usb_get_serial_port_data(port);
282
283 if (portdata->dtr_state)
284 val |= 0x01;
285 if (portdata->rts_state)
286 val |= 0x02;
287
288 /* If composite device then properly report interface */
289 if (serial->num_ports == 1) {
290 interface = sierra_calc_interface(serial);
291 /* Control message is sent only to interfaces with
292 * interrupt_in endpoints
293 */
294 if (port->interrupt_in_urb) {
295 /* send control message */
296 return usb_control_msg(serial->dev,
297 usb_rcvctrlpipe(serial->dev, 0),
298 0x22, 0x21, val, interface,
299 NULL, 0, USB_CTRL_SET_TIMEOUT);
300 }
301 }
302
303 /* Otherwise the need to do non-composite mapping */
304 else {
305 if (port->bulk_out_endpointAddress == 2)
306 interface = 0;
307 else if (port->bulk_out_endpointAddress == 4)
308 interface = 1;
309 else if (port->bulk_out_endpointAddress == 5)
310 interface = 2;
311 return usb_control_msg(serial->dev,
312 usb_rcvctrlpipe(serial->dev, 0),
313 0x22, 0x21, val, interface,
314 NULL, 0, USB_CTRL_SET_TIMEOUT);
315 }
316 return 0;
317 }
318
319 static void sierra_set_termios(struct tty_struct *tty,
320 struct usb_serial_port *port, struct ktermios *old_termios)
321 {
322 dev_dbg(&port->dev, "%s\n", __func__);
323 tty_termios_copy_hw(tty->termios, old_termios);
324 sierra_send_setup(port);
325 }
326
327 static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
328 {
329 struct usb_serial_port *port = tty->driver_data;
330 unsigned int value;
331 struct sierra_port_private *portdata;
332
333 dev_dbg(&port->dev, "%s\n", __func__);
334 portdata = usb_get_serial_port_data(port);
335
336 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
337 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
338 ((portdata->cts_state) ? TIOCM_CTS : 0) |
339 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
340 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
341 ((portdata->ri_state) ? TIOCM_RNG : 0);
342
343 return value;
344 }
345
346 static int sierra_tiocmset(struct tty_struct *tty, struct file *file,
347 unsigned int set, unsigned int clear)
348 {
349 struct usb_serial_port *port = tty->driver_data;
350 struct sierra_port_private *portdata;
351
352 portdata = usb_get_serial_port_data(port);
353
354 if (set & TIOCM_RTS)
355 portdata->rts_state = 1;
356 if (set & TIOCM_DTR)
357 portdata->dtr_state = 1;
358
359 if (clear & TIOCM_RTS)
360 portdata->rts_state = 0;
361 if (clear & TIOCM_DTR)
362 portdata->dtr_state = 0;
363 return sierra_send_setup(port);
364 }
365
366 static void sierra_release_urb(struct urb *urb)
367 {
368 struct usb_serial_port *port;
369 if (urb) {
370 port = urb->context;
371 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
372 kfree(urb->transfer_buffer);
373 usb_free_urb(urb);
374 }
375 }
376
377 static void sierra_outdat_callback(struct urb *urb)
378 {
379 struct usb_serial_port *port = urb->context;
380 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
381 int status = urb->status;
382 unsigned long flags;
383
384 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
385
386 /* free up the transfer buffer, as usb_free_urb() does not do this */
387 kfree(urb->transfer_buffer);
388
389 if (status)
390 dev_dbg(&port->dev, "%s - nonzero write bulk status "
391 "received: %d\n", __func__, status);
392
393 spin_lock_irqsave(&portdata->lock, flags);
394 --portdata->outstanding_urbs;
395 spin_unlock_irqrestore(&portdata->lock, flags);
396
397 usb_serial_port_softint(port);
398 }
399
400 /* Write */
401 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
402 const unsigned char *buf, int count)
403 {
404 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
405 struct usb_serial *serial = port->serial;
406 unsigned long flags;
407 unsigned char *buffer;
408 struct urb *urb;
409 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
410 int retval = 0;
411
412 /* verify that we actually have some data to write */
413 if (count == 0)
414 return 0;
415
416 portdata = usb_get_serial_port_data(port);
417
418 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
419
420 spin_lock_irqsave(&portdata->lock, flags);
421 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
422 portdata->outstanding_urbs);
423 if (portdata->outstanding_urbs > N_OUT_URB) {
424 spin_unlock_irqrestore(&portdata->lock, flags);
425 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
426 return 0;
427 }
428 portdata->outstanding_urbs++;
429 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
430 portdata->outstanding_urbs);
431 spin_unlock_irqrestore(&portdata->lock, flags);
432
433 buffer = kmalloc(writesize, GFP_ATOMIC);
434 if (!buffer) {
435 dev_err(&port->dev, "out of memory\n");
436 retval = -ENOMEM;
437 goto error_no_buffer;
438 }
439
440 urb = usb_alloc_urb(0, GFP_ATOMIC);
441 if (!urb) {
442 dev_err(&port->dev, "no more free urbs\n");
443 retval = -ENOMEM;
444 goto error_no_urb;
445 }
446
447 memcpy(buffer, buf, writesize);
448
449 usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer);
450
451 usb_fill_bulk_urb(urb, serial->dev,
452 usb_sndbulkpipe(serial->dev,
453 port->bulk_out_endpointAddress),
454 buffer, writesize, sierra_outdat_callback, port);
455
456 /* Handle the need to send a zero length packet */
457 urb->transfer_flags |= URB_ZERO_PACKET;
458
459 /* send it down the pipe */
460 retval = usb_submit_urb(urb, GFP_ATOMIC);
461 if (retval) {
462 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
463 "with status = %d\n", __func__, retval);
464 goto error;
465 }
466
467 /* we are done with this urb, so let the host driver
468 * really free it when it is finished with it */
469 usb_free_urb(urb);
470
471 return writesize;
472 error:
473 usb_free_urb(urb);
474 error_no_urb:
475 kfree(buffer);
476 error_no_buffer:
477 spin_lock_irqsave(&portdata->lock, flags);
478 --portdata->outstanding_urbs;
479 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
480 portdata->outstanding_urbs);
481 spin_unlock_irqrestore(&portdata->lock, flags);
482 return retval;
483 }
484
485 static void sierra_indat_callback(struct urb *urb)
486 {
487 int err;
488 int endpoint;
489 struct usb_serial_port *port;
490 struct tty_struct *tty;
491 unsigned char *data = urb->transfer_buffer;
492 int status = urb->status;
493
494 endpoint = usb_pipeendpoint(urb->pipe);
495 port = urb->context;
496
497 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
498
499 if (status) {
500 dev_dbg(&port->dev, "%s: nonzero status: %d on"
501 " endpoint %02x\n", __func__, status, endpoint);
502 } else {
503 if (urb->actual_length) {
504 tty = tty_port_tty_get(&port->port);
505
506 tty_buffer_request_room(tty, urb->actual_length);
507 tty_insert_flip_string(tty, data, urb->actual_length);
508 tty_flip_buffer_push(tty);
509
510 tty_kref_put(tty);
511 usb_serial_debug_data(debug, &port->dev, __func__,
512 urb->actual_length, data);
513 } else {
514 dev_dbg(&port->dev, "%s: empty read urb"
515 " received\n", __func__);
516 }
517 }
518
519 /* Resubmit urb so we continue receiving */
520 if (port->port.count && status != -ESHUTDOWN && status != -EPERM) {
521 err = usb_submit_urb(urb, GFP_ATOMIC);
522 if (err)
523 dev_err(&port->dev, "resubmit read urb failed."
524 "(%d)\n", err);
525 }
526
527 return;
528 }
529
530 static void sierra_instat_callback(struct urb *urb)
531 {
532 int err;
533 int status = urb->status;
534 struct usb_serial_port *port = urb->context;
535 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
536 struct usb_serial *serial = port->serial;
537
538 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
539 urb, port, portdata);
540
541 if (status == 0) {
542 struct usb_ctrlrequest *req_pkt =
543 (struct usb_ctrlrequest *)urb->transfer_buffer;
544
545 if (!req_pkt) {
546 dev_dbg(&port->dev, "%s: NULL req_pkt\n",
547 __func__);
548 return;
549 }
550 if ((req_pkt->bRequestType == 0xA1) &&
551 (req_pkt->bRequest == 0x20)) {
552 int old_dcd_state;
553 unsigned char signals = *((unsigned char *)
554 urb->transfer_buffer +
555 sizeof(struct usb_ctrlrequest));
556 struct tty_struct *tty;
557
558 dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
559 signals);
560
561 old_dcd_state = portdata->dcd_state;
562 portdata->cts_state = 1;
563 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
564 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
565 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
566
567 tty = tty_port_tty_get(&port->port);
568 if (tty && !C_CLOCAL(tty) &&
569 old_dcd_state && !portdata->dcd_state)
570 tty_hangup(tty);
571 tty_kref_put(tty);
572 } else {
573 dev_dbg(&port->dev, "%s: type %x req %x\n",
574 __func__, req_pkt->bRequestType,
575 req_pkt->bRequest);
576 }
577 } else
578 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
579
580 /* Resubmit urb so we continue receiving IRQ data */
581 if (port->port.count && status != -ESHUTDOWN && status != -ENOENT) {
582 urb->dev = serial->dev;
583 err = usb_submit_urb(urb, GFP_ATOMIC);
584 if (err)
585 dev_err(&port->dev, "%s: resubmit intr urb "
586 "failed. (%d)\n", __func__, err);
587 }
588 }
589
590 static int sierra_write_room(struct tty_struct *tty)
591 {
592 struct usb_serial_port *port = tty->driver_data;
593 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
594 unsigned long flags;
595
596 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
597
598 /* try to give a good number back based on if we have any free urbs at
599 * this point in time */
600 spin_lock_irqsave(&portdata->lock, flags);
601 if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) {
602 spin_unlock_irqrestore(&portdata->lock, flags);
603 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
604 return 0;
605 }
606 spin_unlock_irqrestore(&portdata->lock, flags);
607
608 return 2048;
609 }
610
611 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
612 {
613 int i;
614 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
615
616 for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++)
617 usb_kill_urb(portdata->in_urbs[i]);
618
619 usb_kill_urb(port->interrupt_in_urb);
620 }
621
622 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
623 {
624 int ok_cnt;
625 int err = -EINVAL;
626 int i;
627 struct urb *urb;
628 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
629
630 ok_cnt = 0;
631 for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++) {
632 urb = portdata->in_urbs[i];
633 if (!urb)
634 continue;
635 err = usb_submit_urb(urb, mem_flags);
636 if (err) {
637 dev_err(&port->dev, "%s: submit urb failed: %d\n",
638 __func__, err);
639 } else {
640 ok_cnt++;
641 }
642 }
643
644 if (ok_cnt && port->interrupt_in_urb) {
645 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
646 if (err) {
647 dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
648 __func__, err);
649 }
650 }
651
652 if (ok_cnt > 0) /* at least one rx urb submitted */
653 return 0;
654 else
655 return err;
656 }
657
658 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
659 int dir, void *ctx, int len,
660 gfp_t mem_flags,
661 usb_complete_t callback)
662 {
663 struct urb *urb;
664 u8 *buf;
665
666 if (endpoint == -1)
667 return NULL;
668
669 urb = usb_alloc_urb(0, mem_flags);
670 if (urb == NULL) {
671 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
672 __func__, endpoint);
673 return NULL;
674 }
675
676 buf = kmalloc(len, mem_flags);
677 if (buf) {
678 /* Fill URB using supplied data */
679 usb_fill_bulk_urb(urb, serial->dev,
680 usb_sndbulkpipe(serial->dev, endpoint) | dir,
681 buf, len, callback, ctx);
682
683 /* debug */
684 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
685 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
686 } else {
687 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
688 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
689
690 sierra_release_urb(urb);
691 urb = NULL;
692 }
693
694 return urb;
695 }
696
697 static void sierra_close(struct usb_serial_port *port)
698 {
699 int i;
700 struct usb_serial *serial = port->serial;
701 struct sierra_port_private *portdata;
702
703 dev_dbg(&port->dev, "%s\n", __func__);
704 portdata = usb_get_serial_port_data(port);
705
706 portdata->rts_state = 0;
707 portdata->dtr_state = 0;
708
709 if (serial->dev) {
710 mutex_lock(&serial->disc_mutex);
711 if (!serial->disconnected)
712 sierra_send_setup(port);
713 mutex_unlock(&serial->disc_mutex);
714
715 /* Stop reading urbs */
716 sierra_stop_rx_urbs(port);
717 /* .. and release them */
718 for (i = 0; i < N_IN_URB; i++) {
719 sierra_release_urb(portdata->in_urbs[i]);
720 portdata->in_urbs[i] = NULL;
721 }
722 }
723 }
724
725 static int sierra_open(struct tty_struct *tty,
726 struct usb_serial_port *port, struct file *filp)
727 {
728 struct sierra_port_private *portdata;
729 struct usb_serial *serial = port->serial;
730 int i;
731 int err;
732 int endpoint;
733 struct urb *urb;
734
735 portdata = usb_get_serial_port_data(port);
736
737 dev_dbg(&port->dev, "%s\n", __func__);
738
739 /* Set some sane defaults */
740 portdata->rts_state = 1;
741 portdata->dtr_state = 1;
742
743
744 endpoint = port->bulk_in_endpointAddress;
745 for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++) {
746 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
747 IN_BUFLEN, GFP_KERNEL,
748 sierra_indat_callback);
749 portdata->in_urbs[i] = urb;
750 }
751 /* clear halt condition */
752 usb_clear_halt(serial->dev,
753 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
754
755 err = sierra_submit_rx_urbs(port, GFP_KERNEL);
756 if (err) {
757 /* get rid of everything as in close */
758 sierra_close(port);
759 return err;
760 }
761 sierra_send_setup(port);
762
763 return 0;
764 }
765
766
767 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
768 {
769 struct usb_serial *serial = port->serial;
770 struct sierra_port_private *portdata;
771
772 portdata = usb_get_serial_port_data(port);
773 portdata->rts_state = on;
774 portdata->dtr_state = on;
775
776 if (serial->dev) {
777 mutex_lock(&serial->disc_mutex);
778 if (!serial->disconnected)
779 sierra_send_setup(port);
780 mutex_unlock(&serial->disc_mutex);
781 }
782 }
783
784 static int sierra_startup(struct usb_serial *serial)
785 {
786 struct usb_serial_port *port;
787 struct sierra_port_private *portdata;
788 int i;
789
790 dev_dbg(&serial->dev->dev, "%s\n", __func__);
791
792 /* Set Device mode to D0 */
793 sierra_set_power_state(serial->dev, 0x0000);
794
795 /* Check NMEA and set */
796 if (nmea)
797 sierra_vsc_set_nmea(serial->dev, 1);
798
799 /* Now setup per port private data */
800 for (i = 0; i < serial->num_ports; i++) {
801 port = serial->port[i];
802 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
803 if (!portdata) {
804 dev_dbg(&port->dev, "%s: kmalloc for "
805 "sierra_port_private (%d) failed!.\n",
806 __func__, i);
807 return -ENOMEM;
808 }
809 spin_lock_init(&portdata->lock);
810 /* Set the port private data pointer */
811 usb_set_serial_port_data(port, portdata);
812 }
813
814 return 0;
815 }
816
817 static void sierra_shutdown(struct usb_serial *serial)
818 {
819 int i;
820 struct usb_serial_port *port;
821 struct sierra_port_private *portdata;
822
823 dev_dbg(&serial->dev->dev, "%s\n", __func__);
824
825 for (i = 0; i < serial->num_ports; ++i) {
826 port = serial->port[i];
827 if (!port)
828 continue;
829 portdata = usb_get_serial_port_data(port);
830 if (!portdata)
831 continue;
832 kfree(portdata);
833 usb_set_serial_port_data(port, NULL);
834 }
835 }
836
837 static struct usb_serial_driver sierra_device = {
838 .driver = {
839 .owner = THIS_MODULE,
840 .name = "sierra",
841 },
842 .description = "Sierra USB modem",
843 .id_table = id_table,
844 .usb_driver = &sierra_driver,
845 .calc_num_ports = sierra_calc_num_ports,
846 .probe = sierra_probe,
847 .open = sierra_open,
848 .close = sierra_close,
849 .dtr_rts = sierra_dtr_rts,
850 .write = sierra_write,
851 .write_room = sierra_write_room,
852 .set_termios = sierra_set_termios,
853 .tiocmget = sierra_tiocmget,
854 .tiocmset = sierra_tiocmset,
855 .attach = sierra_startup,
856 .shutdown = sierra_shutdown,
857 .read_int_callback = sierra_instat_callback,
858 };
859
860 /* Functions used by new usb-serial code. */
861 static int __init sierra_init(void)
862 {
863 int retval;
864 retval = usb_serial_register(&sierra_device);
865 if (retval)
866 goto failed_device_register;
867
868
869 retval = usb_register(&sierra_driver);
870 if (retval)
871 goto failed_driver_register;
872
873 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
874 DRIVER_DESC "\n");
875
876 return 0;
877
878 failed_driver_register:
879 usb_serial_deregister(&sierra_device);
880 failed_device_register:
881 return retval;
882 }
883
884 static void __exit sierra_exit(void)
885 {
886 usb_deregister(&sierra_driver);
887 usb_serial_deregister(&sierra_device);
888 }
889
890 module_init(sierra_init);
891 module_exit(sierra_exit);
892
893 MODULE_AUTHOR(DRIVER_AUTHOR);
894 MODULE_DESCRIPTION(DRIVER_DESC);
895 MODULE_VERSION(DRIVER_VERSION);
896 MODULE_LICENSE("GPL");
897
898 module_param(nmea, bool, S_IRUGO | S_IWUSR);
899 MODULE_PARM_DESC(nmea, "NMEA streaming");
900
901 module_param(debug, bool, S_IRUGO | S_IWUSR);
902 MODULE_PARM_DESC(debug, "Debug messages");
Support for the Chinese Samsung S3C2440 based development boards