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[mirror_ubuntu-bionic-kernel.git] / drivers / usb / serial / option.c
1 /*
2 USB Driver for GSM modems
3
4 Copyright (C) 2005 Matthias Urlichs <smurf@smurf.noris.de>
5
6 This driver is free software; you can redistribute it and/or modify
7 it under the terms of Version 2 of the GNU General Public License as
8 published by the Free Software Foundation.
9
10 Portions copied from the Keyspan driver by Hugh Blemings <hugh@blemings.org>
11
12 History: see the git log.
13
14 Work sponsored by: Sigos GmbH, Germany <info@sigos.de>
15
16 This driver exists because the "normal" serial driver doesn't work too well
17 with GSM modems. Issues:
18 - data loss -- one single Receive URB is not nearly enough
19 - nonstandard flow (Option devices) control
20 - controlling the baud rate doesn't make sense
21
22 This driver is named "option" because the most common device it's
23 used for is a PC-Card (with an internal OHCI-USB interface, behind
24 which the GSM interface sits), made by Option Inc.
25
26 Some of the "one port" devices actually exhibit multiple USB instances
27 on the USB bus. This is not a bug, these ports are used for different
28 device features.
29 */
30
31 #define DRIVER_VERSION "v0.7.1"
32 #define DRIVER_AUTHOR "Matthias Urlichs <smurf@smurf.noris.de>"
33 #define DRIVER_DESC "USB Driver for GSM modems"
34
35 #include <linux/kernel.h>
36 #include <linux/jiffies.h>
37 #include <linux/errno.h>
38 #include <linux/tty.h>
39 #include <linux/tty_flip.h>
40 #include <linux/module.h>
41 #include <linux/usb.h>
42 #include <linux/usb/serial.h>
43
44 /* Function prototypes */
45 static int option_open(struct usb_serial_port *port, struct file *filp);
46 static void option_close(struct usb_serial_port *port, struct file *filp);
47 static int option_startup(struct usb_serial *serial);
48 static void option_shutdown(struct usb_serial *serial);
49 static void option_rx_throttle(struct usb_serial_port *port);
50 static void option_rx_unthrottle(struct usb_serial_port *port);
51 static int option_write_room(struct usb_serial_port *port);
52
53 static void option_instat_callback(struct urb *urb);
54
55 static int option_write(struct usb_serial_port *port,
56 const unsigned char *buf, int count);
57
58 static int option_chars_in_buffer(struct usb_serial_port *port);
59 static int option_ioctl(struct usb_serial_port *port, struct file *file,
60 unsigned int cmd, unsigned long arg);
61 static void option_set_termios(struct usb_serial_port *port,
62 struct ktermios *old);
63 static void option_break_ctl(struct usb_serial_port *port, int break_state);
64 static int option_tiocmget(struct usb_serial_port *port, struct file *file);
65 static int option_tiocmset(struct usb_serial_port *port, struct file *file,
66 unsigned int set, unsigned int clear);
67 static int option_send_setup(struct usb_serial_port *port);
68
69 /* Vendor and product IDs */
70 #define OPTION_VENDOR_ID 0x0AF0
71 #define OPTION_PRODUCT_COLT 0x5000
72 #define OPTION_PRODUCT_RICOLA 0x6000
73 #define OPTION_PRODUCT_RICOLA_LIGHT 0x6100
74 #define OPTION_PRODUCT_RICOLA_QUAD 0x6200
75 #define OPTION_PRODUCT_RICOLA_QUAD_LIGHT 0x6300
76 #define OPTION_PRODUCT_RICOLA_NDIS 0x6050
77 #define OPTION_PRODUCT_RICOLA_NDIS_LIGHT 0x6150
78 #define OPTION_PRODUCT_RICOLA_NDIS_QUAD 0x6250
79 #define OPTION_PRODUCT_RICOLA_NDIS_QUAD_LIGHT 0x6350
80 #define OPTION_PRODUCT_COBRA 0x6500
81 #define OPTION_PRODUCT_COBRA_BUS 0x6501
82 #define OPTION_PRODUCT_VIPER 0x6600
83 #define OPTION_PRODUCT_VIPER_BUS 0x6601
84 #define OPTION_PRODUCT_GT_MAX_READY 0x6701
85 #define OPTION_PRODUCT_GT_MAX 0x6711
86 #define OPTION_PRODUCT_FUJI_MODEM_LIGHT 0x6721
87 #define OPTION_PRODUCT_FUJI_MODEM_GT 0x6741
88 #define OPTION_PRODUCT_FUJI_MODEM_EX 0x6761
89 #define OPTION_PRODUCT_FUJI_NETWORK_LIGHT 0x6731
90 #define OPTION_PRODUCT_FUJI_NETWORK_GT 0x6751
91 #define OPTION_PRODUCT_FUJI_NETWORK_EX 0x6771
92 #define OPTION_PRODUCT_KOI_MODEM 0x6800
93 #define OPTION_PRODUCT_KOI_NETWORK 0x6811
94 #define OPTION_PRODUCT_SCORPION_MODEM 0x6901
95 #define OPTION_PRODUCT_SCORPION_NETWORK 0x6911
96 #define OPTION_PRODUCT_ETNA_MODEM 0x7001
97 #define OPTION_PRODUCT_ETNA_NETWORK 0x7011
98 #define OPTION_PRODUCT_ETNA_MODEM_LITE 0x7021
99 #define OPTION_PRODUCT_ETNA_MODEM_GT 0x7041
100 #define OPTION_PRODUCT_ETNA_MODEM_EX 0x7061
101 #define OPTION_PRODUCT_ETNA_NETWORK_LITE 0x7031
102 #define OPTION_PRODUCT_ETNA_NETWORK_GT 0x7051
103 #define OPTION_PRODUCT_ETNA_NETWORK_EX 0x7071
104 #define OPTION_PRODUCT_ETNA_KOI_MODEM 0x7100
105 #define OPTION_PRODUCT_ETNA_KOI_NETWORK 0x7111
106
107 #define HUAWEI_VENDOR_ID 0x12D1
108 #define HUAWEI_PRODUCT_E600 0x1001
109 #define HUAWEI_PRODUCT_E220 0x1003
110
111 #define NOVATELWIRELESS_VENDOR_ID 0x1410
112
113 #define ANYDATA_VENDOR_ID 0x16d5
114 #define ANYDATA_PRODUCT_ID 0x6501
115
116 static struct usb_device_id option_ids[] = {
117 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COLT) },
118 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA) },
119 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_LIGHT) },
120 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_QUAD) },
121 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_QUAD_LIGHT) },
122 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS) },
123 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_LIGHT) },
124 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_QUAD) },
125 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_QUAD_LIGHT) },
126 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COBRA) },
127 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COBRA_BUS) },
128 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_VIPER) },
129 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_VIPER_BUS) },
130 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_GT_MAX_READY) },
131 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_GT_MAX) },
132 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_LIGHT) },
133 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_GT) },
134 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_EX) },
135 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_LIGHT) },
136 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_GT) },
137 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_EX) },
138 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_KOI_MODEM) },
139 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_KOI_NETWORK) },
140 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_SCORPION_MODEM) },
141 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_SCORPION_NETWORK) },
142 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM) },
143 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK) },
144 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_LITE) },
145 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_GT) },
146 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_EX) },
147 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_LITE) },
148 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_GT) },
149 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_EX) },
150 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_KOI_MODEM) },
151 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_KOI_NETWORK) },
152 { USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E600) },
153 { USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E220) },
154 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1100) }, /* Novatel Merlin XS620/S640 */
155 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1110) }, /* Novatel Merlin S620 */
156 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1120) }, /* Novatel Merlin EX720 */
157 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1130) }, /* Novatel Merlin S720 */
158 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1400) }, /* Novatel U730 */
159 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1410) }, /* Novatel U740 */
160 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1420) }, /* Novatel EU870 */
161 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1430) }, /* Novatel Merlin XU870 HSDPA/3G */
162 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1430) }, /* Novatel XU870 */
163 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2100) }, /* Novatel EV620 CDMA/EV-DO */
164 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2110) }, /* Novatel Merlin ES620 / Merlin ES720 / Ovation U720 */
165 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2130) }, /* Novatel Merlin ES620 SM Bus */
166 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2410) }, /* Novatel EU740 */
167 { USB_DEVICE(ANYDATA_VENDOR_ID, ANYDATA_PRODUCT_ID) },
168 { } /* Terminating entry */
169 };
170 MODULE_DEVICE_TABLE(usb, option_ids);
171
172 static struct usb_driver option_driver = {
173 .name = "option",
174 .probe = usb_serial_probe,
175 .disconnect = usb_serial_disconnect,
176 .id_table = option_ids,
177 .no_dynamic_id = 1,
178 };
179
180 /* The card has three separate interfaces, which the serial driver
181 * recognizes separately, thus num_port=1.
182 */
183
184 static struct usb_serial_driver option_1port_device = {
185 .driver = {
186 .owner = THIS_MODULE,
187 .name = "option1",
188 },
189 .description = "GSM modem (1-port)",
190 .usb_driver = &option_driver,
191 .id_table = option_ids,
192 .num_interrupt_in = NUM_DONT_CARE,
193 .num_bulk_in = NUM_DONT_CARE,
194 .num_bulk_out = NUM_DONT_CARE,
195 .num_ports = 1,
196 .open = option_open,
197 .close = option_close,
198 .write = option_write,
199 .write_room = option_write_room,
200 .chars_in_buffer = option_chars_in_buffer,
201 .throttle = option_rx_throttle,
202 .unthrottle = option_rx_unthrottle,
203 .ioctl = option_ioctl,
204 .set_termios = option_set_termios,
205 .break_ctl = option_break_ctl,
206 .tiocmget = option_tiocmget,
207 .tiocmset = option_tiocmset,
208 .attach = option_startup,
209 .shutdown = option_shutdown,
210 .read_int_callback = option_instat_callback,
211 };
212
213 #ifdef CONFIG_USB_DEBUG
214 static int debug;
215 #else
216 #define debug 0
217 #endif
218
219 /* per port private data */
220
221 #define N_IN_URB 4
222 #define N_OUT_URB 1
223 #define IN_BUFLEN 4096
224 #define OUT_BUFLEN 128
225
226 struct option_port_private {
227 /* Input endpoints and buffer for this port */
228 struct urb *in_urbs[N_IN_URB];
229 char in_buffer[N_IN_URB][IN_BUFLEN];
230 /* Output endpoints and buffer for this port */
231 struct urb *out_urbs[N_OUT_URB];
232 char out_buffer[N_OUT_URB][OUT_BUFLEN];
233
234 /* Settings for the port */
235 int rts_state; /* Handshaking pins (outputs) */
236 int dtr_state;
237 int cts_state; /* Handshaking pins (inputs) */
238 int dsr_state;
239 int dcd_state;
240 int ri_state;
241
242 unsigned long tx_start_time[N_OUT_URB];
243 };
244
245 /* Functions used by new usb-serial code. */
246 static int __init option_init(void)
247 {
248 int retval;
249 retval = usb_serial_register(&option_1port_device);
250 if (retval)
251 goto failed_1port_device_register;
252 retval = usb_register(&option_driver);
253 if (retval)
254 goto failed_driver_register;
255
256 info(DRIVER_DESC ": " DRIVER_VERSION);
257
258 return 0;
259
260 failed_driver_register:
261 usb_serial_deregister (&option_1port_device);
262 failed_1port_device_register:
263 return retval;
264 }
265
266 static void __exit option_exit(void)
267 {
268 usb_deregister (&option_driver);
269 usb_serial_deregister (&option_1port_device);
270 }
271
272 module_init(option_init);
273 module_exit(option_exit);
274
275 static void option_rx_throttle(struct usb_serial_port *port)
276 {
277 dbg("%s", __FUNCTION__);
278 }
279
280 static void option_rx_unthrottle(struct usb_serial_port *port)
281 {
282 dbg("%s", __FUNCTION__);
283 }
284
285 static void option_break_ctl(struct usb_serial_port *port, int break_state)
286 {
287 /* Unfortunately, I don't know how to send a break */
288 dbg("%s", __FUNCTION__);
289 }
290
291 static void option_set_termios(struct usb_serial_port *port,
292 struct ktermios *old_termios)
293 {
294 dbg("%s", __FUNCTION__);
295
296 option_send_setup(port);
297 }
298
299 static int option_tiocmget(struct usb_serial_port *port, struct file *file)
300 {
301 unsigned int value;
302 struct option_port_private *portdata;
303
304 portdata = usb_get_serial_port_data(port);
305
306 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
307 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
308 ((portdata->cts_state) ? TIOCM_CTS : 0) |
309 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
310 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
311 ((portdata->ri_state) ? TIOCM_RNG : 0);
312
313 return value;
314 }
315
316 static int option_tiocmset(struct usb_serial_port *port, struct file *file,
317 unsigned int set, unsigned int clear)
318 {
319 struct option_port_private *portdata;
320
321 portdata = usb_get_serial_port_data(port);
322
323 if (set & TIOCM_RTS)
324 portdata->rts_state = 1;
325 if (set & TIOCM_DTR)
326 portdata->dtr_state = 1;
327
328 if (clear & TIOCM_RTS)
329 portdata->rts_state = 0;
330 if (clear & TIOCM_DTR)
331 portdata->dtr_state = 0;
332 return option_send_setup(port);
333 }
334
335 static int option_ioctl(struct usb_serial_port *port, struct file *file,
336 unsigned int cmd, unsigned long arg)
337 {
338 return -ENOIOCTLCMD;
339 }
340
341 /* Write */
342 static int option_write(struct usb_serial_port *port,
343 const unsigned char *buf, int count)
344 {
345 struct option_port_private *portdata;
346 int i;
347 int left, todo;
348 struct urb *this_urb = NULL; /* spurious */
349 int err;
350
351 portdata = usb_get_serial_port_data(port);
352
353 dbg("%s: write (%d chars)", __FUNCTION__, count);
354
355 i = 0;
356 left = count;
357 for (i=0; left > 0 && i < N_OUT_URB; i++) {
358 todo = left;
359 if (todo > OUT_BUFLEN)
360 todo = OUT_BUFLEN;
361
362 this_urb = portdata->out_urbs[i];
363 if (this_urb->status == -EINPROGRESS) {
364 if (time_before(jiffies,
365 portdata->tx_start_time[i] + 10 * HZ))
366 continue;
367 usb_unlink_urb(this_urb);
368 continue;
369 }
370 if (this_urb->status != 0)
371 dbg("usb_write %p failed (err=%d)",
372 this_urb, this_urb->status);
373
374 dbg("%s: endpoint %d buf %d", __FUNCTION__,
375 usb_pipeendpoint(this_urb->pipe), i);
376
377 /* send the data */
378 memcpy (this_urb->transfer_buffer, buf, todo);
379 this_urb->transfer_buffer_length = todo;
380
381 this_urb->dev = port->serial->dev;
382 err = usb_submit_urb(this_urb, GFP_ATOMIC);
383 if (err) {
384 dbg("usb_submit_urb %p (write bulk) failed "
385 "(%d, has %d)", this_urb,
386 err, this_urb->status);
387 continue;
388 }
389 portdata->tx_start_time[i] = jiffies;
390 buf += todo;
391 left -= todo;
392 }
393
394 count -= left;
395 dbg("%s: wrote (did %d)", __FUNCTION__, count);
396 return count;
397 }
398
399 static void option_indat_callback(struct urb *urb)
400 {
401 int err;
402 int endpoint;
403 struct usb_serial_port *port;
404 struct tty_struct *tty;
405 unsigned char *data = urb->transfer_buffer;
406
407 dbg("%s: %p", __FUNCTION__, urb);
408
409 endpoint = usb_pipeendpoint(urb->pipe);
410 port = (struct usb_serial_port *) urb->context;
411
412 if (urb->status) {
413 dbg("%s: nonzero status: %d on endpoint %02x.",
414 __FUNCTION__, urb->status, endpoint);
415 } else {
416 tty = port->tty;
417 if (urb->actual_length) {
418 tty_buffer_request_room(tty, urb->actual_length);
419 tty_insert_flip_string(tty, data, urb->actual_length);
420 tty_flip_buffer_push(tty);
421 } else {
422 dbg("%s: empty read urb received", __FUNCTION__);
423 }
424
425 /* Resubmit urb so we continue receiving */
426 if (port->open_count && urb->status != -ESHUTDOWN) {
427 err = usb_submit_urb(urb, GFP_ATOMIC);
428 if (err)
429 printk(KERN_ERR "%s: resubmit read urb failed. "
430 "(%d)", __FUNCTION__, err);
431 }
432 }
433 return;
434 }
435
436 static void option_outdat_callback(struct urb *urb)
437 {
438 struct usb_serial_port *port;
439
440 dbg("%s", __FUNCTION__);
441
442 port = (struct usb_serial_port *) urb->context;
443
444 usb_serial_port_softint(port);
445 }
446
447 static void option_instat_callback(struct urb *urb)
448 {
449 int err;
450 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
451 struct option_port_private *portdata = usb_get_serial_port_data(port);
452 struct usb_serial *serial = port->serial;
453
454 dbg("%s", __FUNCTION__);
455 dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
456
457 if (urb->status == 0) {
458 struct usb_ctrlrequest *req_pkt =
459 (struct usb_ctrlrequest *)urb->transfer_buffer;
460
461 if (!req_pkt) {
462 dbg("%s: NULL req_pkt\n", __FUNCTION__);
463 return;
464 }
465 if ((req_pkt->bRequestType == 0xA1) &&
466 (req_pkt->bRequest == 0x20)) {
467 int old_dcd_state;
468 unsigned char signals = *((unsigned char *)
469 urb->transfer_buffer +
470 sizeof(struct usb_ctrlrequest));
471
472 dbg("%s: signal x%x", __FUNCTION__, signals);
473
474 old_dcd_state = portdata->dcd_state;
475 portdata->cts_state = 1;
476 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
477 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
478 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
479
480 if (port->tty && !C_CLOCAL(port->tty) &&
481 old_dcd_state && !portdata->dcd_state)
482 tty_hangup(port->tty);
483 } else {
484 dbg("%s: type %x req %x", __FUNCTION__,
485 req_pkt->bRequestType,req_pkt->bRequest);
486 }
487 } else
488 dbg("%s: error %d", __FUNCTION__, urb->status);
489
490 /* Resubmit urb so we continue receiving IRQ data */
491 if (urb->status != -ESHUTDOWN) {
492 urb->dev = serial->dev;
493 err = usb_submit_urb(urb, GFP_ATOMIC);
494 if (err)
495 dbg("%s: resubmit intr urb failed. (%d)",
496 __FUNCTION__, err);
497 }
498 }
499
500 static int option_write_room(struct usb_serial_port *port)
501 {
502 struct option_port_private *portdata;
503 int i;
504 int data_len = 0;
505 struct urb *this_urb;
506
507 portdata = usb_get_serial_port_data(port);
508
509 for (i=0; i < N_OUT_URB; i++) {
510 this_urb = portdata->out_urbs[i];
511 if (this_urb && this_urb->status != -EINPROGRESS)
512 data_len += OUT_BUFLEN;
513 }
514
515 dbg("%s: %d", __FUNCTION__, data_len);
516 return data_len;
517 }
518
519 static int option_chars_in_buffer(struct usb_serial_port *port)
520 {
521 struct option_port_private *portdata;
522 int i;
523 int data_len = 0;
524 struct urb *this_urb;
525
526 portdata = usb_get_serial_port_data(port);
527
528 for (i=0; i < N_OUT_URB; i++) {
529 this_urb = portdata->out_urbs[i];
530 if (this_urb && this_urb->status == -EINPROGRESS)
531 data_len += this_urb->transfer_buffer_length;
532 }
533 dbg("%s: %d", __FUNCTION__, data_len);
534 return data_len;
535 }
536
537 static int option_open(struct usb_serial_port *port, struct file *filp)
538 {
539 struct option_port_private *portdata;
540 struct usb_serial *serial = port->serial;
541 int i, err;
542 struct urb *urb;
543
544 portdata = usb_get_serial_port_data(port);
545
546 dbg("%s", __FUNCTION__);
547
548 /* Set some sane defaults */
549 portdata->rts_state = 1;
550 portdata->dtr_state = 1;
551
552 /* Reset low level data toggle and start reading from endpoints */
553 for (i = 0; i < N_IN_URB; i++) {
554 urb = portdata->in_urbs[i];
555 if (! urb)
556 continue;
557 if (urb->dev != serial->dev) {
558 dbg("%s: dev %p != %p", __FUNCTION__,
559 urb->dev, serial->dev);
560 continue;
561 }
562
563 /*
564 * make sure endpoint data toggle is synchronized with the
565 * device
566 */
567 usb_clear_halt(urb->dev, urb->pipe);
568
569 err = usb_submit_urb(urb, GFP_KERNEL);
570 if (err) {
571 dbg("%s: submit urb %d failed (%d) %d",
572 __FUNCTION__, i, err,
573 urb->transfer_buffer_length);
574 }
575 }
576
577 /* Reset low level data toggle on out endpoints */
578 for (i = 0; i < N_OUT_URB; i++) {
579 urb = portdata->out_urbs[i];
580 if (! urb)
581 continue;
582 urb->dev = serial->dev;
583 /* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
584 usb_pipeout(urb->pipe), 0); */
585 }
586
587 port->tty->low_latency = 1;
588
589 option_send_setup(port);
590
591 return (0);
592 }
593
594 static void option_close(struct usb_serial_port *port, struct file *filp)
595 {
596 int i;
597 struct usb_serial *serial = port->serial;
598 struct option_port_private *portdata;
599
600 dbg("%s", __FUNCTION__);
601 portdata = usb_get_serial_port_data(port);
602
603 portdata->rts_state = 0;
604 portdata->dtr_state = 0;
605
606 if (serial->dev) {
607 option_send_setup(port);
608
609 /* Stop reading/writing urbs */
610 for (i = 0; i < N_IN_URB; i++)
611 usb_kill_urb(portdata->in_urbs[i]);
612 for (i = 0; i < N_OUT_URB; i++)
613 usb_kill_urb(portdata->out_urbs[i]);
614 }
615 port->tty = NULL;
616 }
617
618 /* Helper functions used by option_setup_urbs */
619 static struct urb *option_setup_urb(struct usb_serial *serial, int endpoint,
620 int dir, void *ctx, char *buf, int len,
621 void (*callback)(struct urb *))
622 {
623 struct urb *urb;
624
625 if (endpoint == -1)
626 return NULL; /* endpoint not needed */
627
628 urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
629 if (urb == NULL) {
630 dbg("%s: alloc for endpoint %d failed.", __FUNCTION__, endpoint);
631 return NULL;
632 }
633
634 /* Fill URB using supplied data. */
635 usb_fill_bulk_urb(urb, serial->dev,
636 usb_sndbulkpipe(serial->dev, endpoint) | dir,
637 buf, len, callback, ctx);
638
639 return urb;
640 }
641
642 /* Setup urbs */
643 static void option_setup_urbs(struct usb_serial *serial)
644 {
645 int i,j;
646 struct usb_serial_port *port;
647 struct option_port_private *portdata;
648
649 dbg("%s", __FUNCTION__);
650
651 for (i = 0; i < serial->num_ports; i++) {
652 port = serial->port[i];
653 portdata = usb_get_serial_port_data(port);
654
655 /* Do indat endpoints first */
656 for (j = 0; j < N_IN_URB; ++j) {
657 portdata->in_urbs[j] = option_setup_urb (serial,
658 port->bulk_in_endpointAddress, USB_DIR_IN, port,
659 portdata->in_buffer[j], IN_BUFLEN, option_indat_callback);
660 }
661
662 /* outdat endpoints */
663 for (j = 0; j < N_OUT_URB; ++j) {
664 portdata->out_urbs[j] = option_setup_urb (serial,
665 port->bulk_out_endpointAddress, USB_DIR_OUT, port,
666 portdata->out_buffer[j], OUT_BUFLEN, option_outdat_callback);
667 }
668 }
669 }
670
671 static int option_send_setup(struct usb_serial_port *port)
672 {
673 struct usb_serial *serial = port->serial;
674 struct option_port_private *portdata;
675
676 dbg("%s", __FUNCTION__);
677
678 if (port->number != 0)
679 return 0;
680
681 portdata = usb_get_serial_port_data(port);
682
683 if (port->tty) {
684 int val = 0;
685 if (portdata->dtr_state)
686 val |= 0x01;
687 if (portdata->rts_state)
688 val |= 0x02;
689
690 return usb_control_msg(serial->dev,
691 usb_rcvctrlpipe(serial->dev, 0),
692 0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT);
693 }
694
695 return 0;
696 }
697
698 static int option_startup(struct usb_serial *serial)
699 {
700 int i, err;
701 struct usb_serial_port *port;
702 struct option_port_private *portdata;
703
704 dbg("%s", __FUNCTION__);
705
706 /* Now setup per port private data */
707 for (i = 0; i < serial->num_ports; i++) {
708 port = serial->port[i];
709 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
710 if (!portdata) {
711 dbg("%s: kmalloc for option_port_private (%d) failed!.",
712 __FUNCTION__, i);
713 return (1);
714 }
715
716 usb_set_serial_port_data(port, portdata);
717
718 if (! port->interrupt_in_urb)
719 continue;
720 err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
721 if (err)
722 dbg("%s: submit irq_in urb failed %d",
723 __FUNCTION__, err);
724 }
725
726 option_setup_urbs(serial);
727
728 return (0);
729 }
730
731 static void option_shutdown(struct usb_serial *serial)
732 {
733 int i, j;
734 struct usb_serial_port *port;
735 struct option_port_private *portdata;
736
737 dbg("%s", __FUNCTION__);
738
739 /* Stop reading/writing urbs */
740 for (i = 0; i < serial->num_ports; ++i) {
741 port = serial->port[i];
742 portdata = usb_get_serial_port_data(port);
743 for (j = 0; j < N_IN_URB; j++)
744 usb_kill_urb(portdata->in_urbs[j]);
745 for (j = 0; j < N_OUT_URB; j++)
746 usb_kill_urb(portdata->out_urbs[j]);
747 }
748
749 /* Now free them */
750 for (i = 0; i < serial->num_ports; ++i) {
751 port = serial->port[i];
752 portdata = usb_get_serial_port_data(port);
753
754 for (j = 0; j < N_IN_URB; j++) {
755 if (portdata->in_urbs[j]) {
756 usb_free_urb(portdata->in_urbs[j]);
757 portdata->in_urbs[j] = NULL;
758 }
759 }
760 for (j = 0; j < N_OUT_URB; j++) {
761 if (portdata->out_urbs[j]) {
762 usb_free_urb(portdata->out_urbs[j]);
763 portdata->out_urbs[j] = NULL;
764 }
765 }
766 }
767
768 /* Now free per port private data */
769 for (i = 0; i < serial->num_ports; i++) {
770 port = serial->port[i];
771 kfree(usb_get_serial_port_data(port));
772 }
773 }
774
775 MODULE_AUTHOR(DRIVER_AUTHOR);
776 MODULE_DESCRIPTION(DRIVER_DESC);
777 MODULE_VERSION(DRIVER_VERSION);
778 MODULE_LICENSE("GPL");
779
780 #ifdef CONFIG_USB_DEBUG
781 module_param(debug, bool, S_IRUGO | S_IWUSR);
782 MODULE_PARM_DESC(debug, "Debug messages");
783 #endif
784
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