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USB: serial: option: clean up urb->status usage
[linux-2.6/mini2440.git] / drivers / usb / serial / option.c
blob84c12b5f12715675148551bbee25ca5be5ae2b19
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/bitops.h>
42 #include <linux/usb.h>
43 #include <linux/usb/serial.h>
44
45 /* Function prototypes */
46 static int option_open(struct usb_serial_port *port, struct file *filp);
47 static void option_close(struct usb_serial_port *port, struct file *filp);
48 static int option_startup(struct usb_serial *serial);
49 static void option_shutdown(struct usb_serial *serial);
50 static void option_rx_throttle(struct usb_serial_port *port);
51 static void option_rx_unthrottle(struct usb_serial_port *port);
52 static int option_write_room(struct usb_serial_port *port);
53
54 static void option_instat_callback(struct urb *urb);
55
56 static int option_write(struct usb_serial_port *port,
57 const unsigned char *buf, int count);
58
59 static int option_chars_in_buffer(struct usb_serial_port *port);
60 static int option_ioctl(struct usb_serial_port *port, struct file *file,
61 unsigned int cmd, unsigned long arg);
62 static void option_set_termios(struct usb_serial_port *port,
63 struct ktermios *old);
64 static void option_break_ctl(struct usb_serial_port *port, int break_state);
65 static int option_tiocmget(struct usb_serial_port *port, struct file *file);
66 static int option_tiocmset(struct usb_serial_port *port, struct file *file,
67 unsigned int set, unsigned int clear);
68 static int option_send_setup(struct usb_serial_port *port);
69
70 /* Vendor and product IDs */
71 #define OPTION_VENDOR_ID 0x0AF0
72 #define OPTION_PRODUCT_COLT 0x5000
73 #define OPTION_PRODUCT_RICOLA 0x6000
74 #define OPTION_PRODUCT_RICOLA_LIGHT 0x6100
75 #define OPTION_PRODUCT_RICOLA_QUAD 0x6200
76 #define OPTION_PRODUCT_RICOLA_QUAD_LIGHT 0x6300
77 #define OPTION_PRODUCT_RICOLA_NDIS 0x6050
78 #define OPTION_PRODUCT_RICOLA_NDIS_LIGHT 0x6150
79 #define OPTION_PRODUCT_RICOLA_NDIS_QUAD 0x6250
80 #define OPTION_PRODUCT_RICOLA_NDIS_QUAD_LIGHT 0x6350
81 #define OPTION_PRODUCT_COBRA 0x6500
82 #define OPTION_PRODUCT_COBRA_BUS 0x6501
83 #define OPTION_PRODUCT_VIPER 0x6600
84 #define OPTION_PRODUCT_VIPER_BUS 0x6601
85 #define OPTION_PRODUCT_GT_MAX_READY 0x6701
86 #define OPTION_PRODUCT_GT_MAX 0x6711
87 #define OPTION_PRODUCT_FUJI_MODEM_LIGHT 0x6721
88 #define OPTION_PRODUCT_FUJI_MODEM_GT 0x6741
89 #define OPTION_PRODUCT_FUJI_MODEM_EX 0x6761
90 #define OPTION_PRODUCT_FUJI_NETWORK_LIGHT 0x6731
91 #define OPTION_PRODUCT_FUJI_NETWORK_GT 0x6751
92 #define OPTION_PRODUCT_FUJI_NETWORK_EX 0x6771
93 #define OPTION_PRODUCT_KOI_MODEM 0x6800
94 #define OPTION_PRODUCT_KOI_NETWORK 0x6811
95 #define OPTION_PRODUCT_SCORPION_MODEM 0x6901
96 #define OPTION_PRODUCT_SCORPION_NETWORK 0x6911
97 #define OPTION_PRODUCT_ETNA_MODEM 0x7001
98 #define OPTION_PRODUCT_ETNA_NETWORK 0x7011
99 #define OPTION_PRODUCT_ETNA_MODEM_LITE 0x7021
100 #define OPTION_PRODUCT_ETNA_MODEM_GT 0x7041
101 #define OPTION_PRODUCT_ETNA_MODEM_EX 0x7061
102 #define OPTION_PRODUCT_ETNA_NETWORK_LITE 0x7031
103 #define OPTION_PRODUCT_ETNA_NETWORK_GT 0x7051
104 #define OPTION_PRODUCT_ETNA_NETWORK_EX 0x7071
105 #define OPTION_PRODUCT_ETNA_KOI_MODEM 0x7100
106 #define OPTION_PRODUCT_ETNA_KOI_NETWORK 0x7111
107
108 #define HUAWEI_VENDOR_ID 0x12D1
109 #define HUAWEI_PRODUCT_E600 0x1001
110 #define HUAWEI_PRODUCT_E220 0x1003
111
112 #define NOVATELWIRELESS_VENDOR_ID 0x1410
113
114 #define ANYDATA_VENDOR_ID 0x16d5
115 #define ANYDATA_PRODUCT_ADU_E100A 0x6501
116 #define ANYDATA_PRODUCT_ADU_500A 0x6502
117
118 #define BANDRICH_VENDOR_ID 0x1A8D
119 #define BANDRICH_PRODUCT_C100_1 0x1002
120 #define BANDRICH_PRODUCT_C100_2 0x1003
121
122 #define DELL_VENDOR_ID 0x413C
123
124 static struct usb_device_id option_ids[] = {
125 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COLT) },
126 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA) },
127 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_LIGHT) },
128 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_QUAD) },
129 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_QUAD_LIGHT) },
130 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS) },
131 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_LIGHT) },
132 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_QUAD) },
133 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_QUAD_LIGHT) },
134 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COBRA) },
135 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COBRA_BUS) },
136 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_VIPER) },
137 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_VIPER_BUS) },
138 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_GT_MAX_READY) },
139 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_GT_MAX) },
140 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_LIGHT) },
141 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_GT) },
142 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_EX) },
143 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_LIGHT) },
144 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_GT) },
145 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_EX) },
146 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_KOI_MODEM) },
147 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_KOI_NETWORK) },
148 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_SCORPION_MODEM) },
149 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_SCORPION_NETWORK) },
150 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM) },
151 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK) },
152 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_LITE) },
153 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_GT) },
154 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_EX) },
155 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_LITE) },
156 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_GT) },
157 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_EX) },
158 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_KOI_MODEM) },
159 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_KOI_NETWORK) },
160 { USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E600) },
161 { USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E220) },
162 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1100) }, /* Novatel Merlin XS620/S640 */
163 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1110) }, /* Novatel Merlin S620 */
164 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1120) }, /* Novatel Merlin EX720 */
165 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1130) }, /* Novatel Merlin S720 */
166 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1400) }, /* Novatel U730 */
167 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1410) }, /* Novatel U740 */
168 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1420) }, /* Novatel EU870 */
169 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1430) }, /* Novatel Merlin XU870 HSDPA/3G */
170 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2100) }, /* Novatel EV620 CDMA/EV-DO */
171 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2110) }, /* Novatel Merlin ES620 / Merlin ES720 / Ovation U720 */
172 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2130) }, /* Novatel Merlin ES620 SM Bus */
173 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2410) }, /* Novatel EU740 */
174 { USB_DEVICE(ANYDATA_VENDOR_ID, ANYDATA_PRODUCT_ADU_E100A) },
175 { USB_DEVICE(ANYDATA_VENDOR_ID, ANYDATA_PRODUCT_ADU_500A) },
176 { USB_DEVICE(BANDRICH_VENDOR_ID, BANDRICH_PRODUCT_C100_1) },
177 { USB_DEVICE(BANDRICH_VENDOR_ID, BANDRICH_PRODUCT_C100_2) },
178 { USB_DEVICE(DELL_VENDOR_ID, 0x8118) }, /* Dell Wireless 5510 Mobile Broadband HSDPA ExpressCard */
179 { } /* Terminating entry */
180 };
181 MODULE_DEVICE_TABLE(usb, option_ids);
182
183 static struct usb_driver option_driver = {
184 .name = "option",
185 .probe = usb_serial_probe,
186 .disconnect = usb_serial_disconnect,
187 .id_table = option_ids,
188 .no_dynamic_id = 1,
189 };
190
191 /* The card has three separate interfaces, which the serial driver
192 * recognizes separately, thus num_port=1.
193 */
194
195 static struct usb_serial_driver option_1port_device = {
196 .driver = {
197 .owner = THIS_MODULE,
198 .name = "option1",
199 },
200 .description = "GSM modem (1-port)",
201 .usb_driver = &option_driver,
202 .id_table = option_ids,
203 .num_interrupt_in = NUM_DONT_CARE,
204 .num_bulk_in = NUM_DONT_CARE,
205 .num_bulk_out = NUM_DONT_CARE,
206 .num_ports = 1,
207 .open = option_open,
208 .close = option_close,
209 .write = option_write,
210 .write_room = option_write_room,
211 .chars_in_buffer = option_chars_in_buffer,
212 .throttle = option_rx_throttle,
213 .unthrottle = option_rx_unthrottle,
214 .ioctl = option_ioctl,
215 .set_termios = option_set_termios,
216 .break_ctl = option_break_ctl,
217 .tiocmget = option_tiocmget,
218 .tiocmset = option_tiocmset,
219 .attach = option_startup,
220 .shutdown = option_shutdown,
221 .read_int_callback = option_instat_callback,
222 };
223
224 #ifdef CONFIG_USB_DEBUG
225 static int debug;
226 #else
227 #define debug 0
228 #endif
229
230 /* per port private data */
231
232 #define N_IN_URB 4
233 #define N_OUT_URB 1
234 #define IN_BUFLEN 4096
235 #define OUT_BUFLEN 128
236
237 struct option_port_private {
238 /* Input endpoints and buffer for this port */
239 struct urb *in_urbs[N_IN_URB];
240 char in_buffer[N_IN_URB][IN_BUFLEN];
241 /* Output endpoints and buffer for this port */
242 struct urb *out_urbs[N_OUT_URB];
243 char out_buffer[N_OUT_URB][OUT_BUFLEN];
244 unsigned long out_busy; /* Bit vector of URBs in use */
245
246 /* Settings for the port */
247 int rts_state; /* Handshaking pins (outputs) */
248 int dtr_state;
249 int cts_state; /* Handshaking pins (inputs) */
250 int dsr_state;
251 int dcd_state;
252 int ri_state;
253
254 unsigned long tx_start_time[N_OUT_URB];
255 };
256
257 /* Functions used by new usb-serial code. */
258 static int __init option_init(void)
259 {
260 int retval;
261 retval = usb_serial_register(&option_1port_device);
262 if (retval)
263 goto failed_1port_device_register;
264 retval = usb_register(&option_driver);
265 if (retval)
266 goto failed_driver_register;
267
268 info(DRIVER_DESC ": " DRIVER_VERSION);
269
270 return 0;
271
272 failed_driver_register:
273 usb_serial_deregister (&option_1port_device);
274 failed_1port_device_register:
275 return retval;
276 }
277
278 static void __exit option_exit(void)
279 {
280 usb_deregister (&option_driver);
281 usb_serial_deregister (&option_1port_device);
282 }
283
284 module_init(option_init);
285 module_exit(option_exit);
286
287 static void option_rx_throttle(struct usb_serial_port *port)
288 {
289 dbg("%s", __FUNCTION__);
290 }
291
292 static void option_rx_unthrottle(struct usb_serial_port *port)
293 {
294 dbg("%s", __FUNCTION__);
295 }
296
297 static void option_break_ctl(struct usb_serial_port *port, int break_state)
298 {
299 /* Unfortunately, I don't know how to send a break */
300 dbg("%s", __FUNCTION__);
301 }
302
303 static void option_set_termios(struct usb_serial_port *port,
304 struct ktermios *old_termios)
305 {
306 dbg("%s", __FUNCTION__);
307
308 option_send_setup(port);
309 }
310
311 static int option_tiocmget(struct usb_serial_port *port, struct file *file)
312 {
313 unsigned int value;
314 struct option_port_private *portdata;
315
316 portdata = usb_get_serial_port_data(port);
317
318 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
319 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
320 ((portdata->cts_state) ? TIOCM_CTS : 0) |
321 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
322 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
323 ((portdata->ri_state) ? TIOCM_RNG : 0);
324
325 return value;
326 }
327
328 static int option_tiocmset(struct usb_serial_port *port, struct file *file,
329 unsigned int set, unsigned int clear)
330 {
331 struct option_port_private *portdata;
332
333 portdata = usb_get_serial_port_data(port);
334
335 if (set & TIOCM_RTS)
336 portdata->rts_state = 1;
337 if (set & TIOCM_DTR)
338 portdata->dtr_state = 1;
339
340 if (clear & TIOCM_RTS)
341 portdata->rts_state = 0;
342 if (clear & TIOCM_DTR)
343 portdata->dtr_state = 0;
344 return option_send_setup(port);
345 }
346
347 static int option_ioctl(struct usb_serial_port *port, struct file *file,
348 unsigned int cmd, unsigned long arg)
349 {
350 return -ENOIOCTLCMD;
351 }
352
353 /* Write */
354 static int option_write(struct usb_serial_port *port,
355 const unsigned char *buf, int count)
356 {
357 struct option_port_private *portdata;
358 int i;
359 int left, todo;
360 struct urb *this_urb = NULL; /* spurious */
361 int err;
362
363 portdata = usb_get_serial_port_data(port);
364
365 dbg("%s: write (%d chars)", __FUNCTION__, count);
366
367 i = 0;
368 left = count;
369 for (i=0; left > 0 && i < N_OUT_URB; i++) {
370 todo = left;
371 if (todo > OUT_BUFLEN)
372 todo = OUT_BUFLEN;
373
374 this_urb = portdata->out_urbs[i];
375 if (test_and_set_bit(i, &portdata->out_busy)) {
376 if (time_before(jiffies,
377 portdata->tx_start_time[i] + 10 * HZ))
378 continue;
379 usb_unlink_urb(this_urb);
380 continue;
381 }
382 if (this_urb->status != 0)
383 dbg("usb_write %p failed (err=%d)",
384 this_urb, this_urb->status);
385
386 dbg("%s: endpoint %d buf %d", __FUNCTION__,
387 usb_pipeendpoint(this_urb->pipe), i);
388
389 /* send the data */
390 memcpy (this_urb->transfer_buffer, buf, todo);
391 this_urb->transfer_buffer_length = todo;
392
393 this_urb->dev = port->serial->dev;
394 err = usb_submit_urb(this_urb, GFP_ATOMIC);
395 if (err) {
396 dbg("usb_submit_urb %p (write bulk) failed "
397 "(%d, has %d)", this_urb,
398 err, this_urb->status);
399 clear_bit(i, &portdata->out_busy);
400 continue;
401 }
402 portdata->tx_start_time[i] = jiffies;
403 buf += todo;
404 left -= todo;
405 }
406
407 count -= left;
408 dbg("%s: wrote (did %d)", __FUNCTION__, count);
409 return count;
410 }
411
412 static void option_indat_callback(struct urb *urb)
413 {
414 int err;
415 int endpoint;
416 struct usb_serial_port *port;
417 struct tty_struct *tty;
418 unsigned char *data = urb->transfer_buffer;
419 int status = urb->status;
420
421 dbg("%s: %p", __FUNCTION__, urb);
422
423 endpoint = usb_pipeendpoint(urb->pipe);
424 port = (struct usb_serial_port *) urb->context;
425
426 if (status) {
427 dbg("%s: nonzero status: %d on endpoint %02x.",
428 __FUNCTION__, status, endpoint);
429 } else {
430 tty = port->tty;
431 if (urb->actual_length) {
432 tty_buffer_request_room(tty, urb->actual_length);
433 tty_insert_flip_string(tty, data, urb->actual_length);
434 tty_flip_buffer_push(tty);
435 } else {
436 dbg("%s: empty read urb received", __FUNCTION__);
437 }
438
439 /* Resubmit urb so we continue receiving */
440 if (port->open_count && status != -ESHUTDOWN) {
441 err = usb_submit_urb(urb, GFP_ATOMIC);
442 if (err)
443 printk(KERN_ERR "%s: resubmit read urb failed. "
444 "(%d)", __FUNCTION__, err);
445 }
446 }
447 return;
448 }
449
450 static void option_outdat_callback(struct urb *urb)
451 {
452 struct usb_serial_port *port;
453 struct option_port_private *portdata;
454 int i;
455
456 dbg("%s", __FUNCTION__);
457
458 port = (struct usb_serial_port *) urb->context;
459
460 usb_serial_port_softint(port);
461
462 portdata = usb_get_serial_port_data(port);
463 for (i = 0; i < N_OUT_URB; ++i) {
464 if (portdata->out_urbs[i] == urb) {
465 smp_mb__before_clear_bit();
466 clear_bit(i, &portdata->out_busy);
467 break;
468 }
469 }
470 }
471
472 static void option_instat_callback(struct urb *urb)
473 {
474 int err;
475 int status = urb->status;
476 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
477 struct option_port_private *portdata = usb_get_serial_port_data(port);
478 struct usb_serial *serial = port->serial;
479
480 dbg("%s", __FUNCTION__);
481 dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
482
483 if (status == 0) {
484 struct usb_ctrlrequest *req_pkt =
485 (struct usb_ctrlrequest *)urb->transfer_buffer;
486
487 if (!req_pkt) {
488 dbg("%s: NULL req_pkt\n", __FUNCTION__);
489 return;
490 }
491 if ((req_pkt->bRequestType == 0xA1) &&
492 (req_pkt->bRequest == 0x20)) {
493 int old_dcd_state;
494 unsigned char signals = *((unsigned char *)
495 urb->transfer_buffer +
496 sizeof(struct usb_ctrlrequest));
497
498 dbg("%s: signal x%x", __FUNCTION__, signals);
499
500 old_dcd_state = portdata->dcd_state;
501 portdata->cts_state = 1;
502 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
503 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
504 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
505
506 if (port->tty && !C_CLOCAL(port->tty) &&
507 old_dcd_state && !portdata->dcd_state)
508 tty_hangup(port->tty);
509 } else {
510 dbg("%s: type %x req %x", __FUNCTION__,
511 req_pkt->bRequestType,req_pkt->bRequest);
512 }
513 } else
514 dbg("%s: error %d", __FUNCTION__, status);
515
516 /* Resubmit urb so we continue receiving IRQ data */
517 if (status != -ESHUTDOWN) {
518 urb->dev = serial->dev;
519 err = usb_submit_urb(urb, GFP_ATOMIC);
520 if (err)
521 dbg("%s: resubmit intr urb failed. (%d)",
522 __FUNCTION__, err);
523 }
524 }
525
526 static int option_write_room(struct usb_serial_port *port)
527 {
528 struct option_port_private *portdata;
529 int i;
530 int data_len = 0;
531 struct urb *this_urb;
532
533 portdata = usb_get_serial_port_data(port);
534
535 for (i=0; i < N_OUT_URB; i++) {
536 this_urb = portdata->out_urbs[i];
537 if (this_urb && !test_bit(i, &portdata->out_busy))
538 data_len += OUT_BUFLEN;
539 }
540
541 dbg("%s: %d", __FUNCTION__, data_len);
542 return data_len;
543 }
544
545 static int option_chars_in_buffer(struct usb_serial_port *port)
546 {
547 struct option_port_private *portdata;
548 int i;
549 int data_len = 0;
550 struct urb *this_urb;
551
552 portdata = usb_get_serial_port_data(port);
553
554 for (i=0; i < N_OUT_URB; i++) {
555 this_urb = portdata->out_urbs[i];
556 if (this_urb && test_bit(i, &portdata->out_busy))
557 data_len += this_urb->transfer_buffer_length;
558 }
559 dbg("%s: %d", __FUNCTION__, data_len);
560 return data_len;
561 }
562
563 static int option_open(struct usb_serial_port *port, struct file *filp)
564 {
565 struct option_port_private *portdata;
566 struct usb_serial *serial = port->serial;
567 int i, err;
568 struct urb *urb;
569
570 portdata = usb_get_serial_port_data(port);
571
572 dbg("%s", __FUNCTION__);
573
574 /* Set some sane defaults */
575 portdata->rts_state = 1;
576 portdata->dtr_state = 1;
577
578 /* Reset low level data toggle and start reading from endpoints */
579 for (i = 0; i < N_IN_URB; i++) {
580 urb = portdata->in_urbs[i];
581 if (! urb)
582 continue;
583 if (urb->dev != serial->dev) {
584 dbg("%s: dev %p != %p", __FUNCTION__,
585 urb->dev, serial->dev);
586 continue;
587 }
588
589 /*
590 * make sure endpoint data toggle is synchronized with the
591 * device
592 */
593 usb_clear_halt(urb->dev, urb->pipe);
594
595 err = usb_submit_urb(urb, GFP_KERNEL);
596 if (err) {
597 dbg("%s: submit urb %d failed (%d) %d",
598 __FUNCTION__, i, err,
599 urb->transfer_buffer_length);
600 }
601 }
602
603 /* Reset low level data toggle on out endpoints */
604 for (i = 0; i < N_OUT_URB; i++) {
605 urb = portdata->out_urbs[i];
606 if (! urb)
607 continue;
608 urb->dev = serial->dev;
609 /* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
610 usb_pipeout(urb->pipe), 0); */
611 }
612
613 port->tty->low_latency = 1;
614
615 option_send_setup(port);
616
617 return (0);
618 }
619
620 static void option_close(struct usb_serial_port *port, struct file *filp)
621 {
622 int i;
623 struct usb_serial *serial = port->serial;
624 struct option_port_private *portdata;
625
626 dbg("%s", __FUNCTION__);
627 portdata = usb_get_serial_port_data(port);
628
629 portdata->rts_state = 0;
630 portdata->dtr_state = 0;
631
632 if (serial->dev) {
633 option_send_setup(port);
634
635 /* Stop reading/writing urbs */
636 for (i = 0; i < N_IN_URB; i++)
637 usb_kill_urb(portdata->in_urbs[i]);
638 for (i = 0; i < N_OUT_URB; i++)
639 usb_kill_urb(portdata->out_urbs[i]);
640 }
641 port->tty = NULL;
642 }
643
644 /* Helper functions used by option_setup_urbs */
645 static struct urb *option_setup_urb(struct usb_serial *serial, int endpoint,
646 int dir, void *ctx, char *buf, int len,
647 void (*callback)(struct urb *))
648 {
649 struct urb *urb;
650
651 if (endpoint == -1)
652 return NULL; /* endpoint not needed */
653
654 urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
655 if (urb == NULL) {
656 dbg("%s: alloc for endpoint %d failed.", __FUNCTION__, endpoint);
657 return NULL;
658 }
659
660 /* Fill URB using supplied data. */
661 usb_fill_bulk_urb(urb, serial->dev,
662 usb_sndbulkpipe(serial->dev, endpoint) | dir,
663 buf, len, callback, ctx);
664
665 return urb;
666 }
667
668 /* Setup urbs */
669 static void option_setup_urbs(struct usb_serial *serial)
670 {
671 int i,j;
672 struct usb_serial_port *port;
673 struct option_port_private *portdata;
674
675 dbg("%s", __FUNCTION__);
676
677 for (i = 0; i < serial->num_ports; i++) {
678 port = serial->port[i];
679 portdata = usb_get_serial_port_data(port);
680
681 /* Do indat endpoints first */
682 for (j = 0; j < N_IN_URB; ++j) {
683 portdata->in_urbs[j] = option_setup_urb (serial,
684 port->bulk_in_endpointAddress, USB_DIR_IN, port,
685 portdata->in_buffer[j], IN_BUFLEN, option_indat_callback);
686 }
687
688 /* outdat endpoints */
689 for (j = 0; j < N_OUT_URB; ++j) {
690 portdata->out_urbs[j] = option_setup_urb (serial,
691 port->bulk_out_endpointAddress, USB_DIR_OUT, port,
692 portdata->out_buffer[j], OUT_BUFLEN, option_outdat_callback);
693 }
694 }
695 }
696
697 static int option_send_setup(struct usb_serial_port *port)
698 {
699 struct usb_serial *serial = port->serial;
700 struct option_port_private *portdata;
701
702 dbg("%s", __FUNCTION__);
703
704 if (port->number != 0)
705 return 0;
706
707 portdata = usb_get_serial_port_data(port);
708
709 if (port->tty) {
710 int val = 0;
711 if (portdata->dtr_state)
712 val |= 0x01;
713 if (portdata->rts_state)
714 val |= 0x02;
715
716 return usb_control_msg(serial->dev,
717 usb_rcvctrlpipe(serial->dev, 0),
718 0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT);
719 }
720
721 return 0;
722 }
723
724 static int option_startup(struct usb_serial *serial)
725 {
726 int i, err;
727 struct usb_serial_port *port;
728 struct option_port_private *portdata;
729
730 dbg("%s", __FUNCTION__);
731
732 /* Now setup per port private data */
733 for (i = 0; i < serial->num_ports; i++) {
734 port = serial->port[i];
735 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
736 if (!portdata) {
737 dbg("%s: kmalloc for option_port_private (%d) failed!.",
738 __FUNCTION__, i);
739 return (1);
740 }
741
742 usb_set_serial_port_data(port, portdata);
743
744 if (! port->interrupt_in_urb)
745 continue;
746 err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
747 if (err)
748 dbg("%s: submit irq_in urb failed %d",
749 __FUNCTION__, err);
750 }
751
752 option_setup_urbs(serial);
753
754 return (0);
755 }
756
757 static void option_shutdown(struct usb_serial *serial)
758 {
759 int i, j;
760 struct usb_serial_port *port;
761 struct option_port_private *portdata;
762
763 dbg("%s", __FUNCTION__);
764
765 /* Stop reading/writing urbs */
766 for (i = 0; i < serial->num_ports; ++i) {
767 port = serial->port[i];
768 portdata = usb_get_serial_port_data(port);
769 for (j = 0; j < N_IN_URB; j++)
770 usb_kill_urb(portdata->in_urbs[j]);
771 for (j = 0; j < N_OUT_URB; j++)
772 usb_kill_urb(portdata->out_urbs[j]);
773 }
774
775 /* Now free them */
776 for (i = 0; i < serial->num_ports; ++i) {
777 port = serial->port[i];
778 portdata = usb_get_serial_port_data(port);
779
780 for (j = 0; j < N_IN_URB; j++) {
781 if (portdata->in_urbs[j]) {
782 usb_free_urb(portdata->in_urbs[j]);
783 portdata->in_urbs[j] = NULL;
784 }
785 }
786 for (j = 0; j < N_OUT_URB; j++) {
787 if (portdata->out_urbs[j]) {
788 usb_free_urb(portdata->out_urbs[j]);
789 portdata->out_urbs[j] = NULL;
790 }
791 }
792 }
793
794 /* Now free per port private data */
795 for (i = 0; i < serial->num_ports; i++) {
796 port = serial->port[i];
797 kfree(usb_get_serial_port_data(port));
798 }
799 }
800
801 MODULE_AUTHOR(DRIVER_AUTHOR);
802 MODULE_DESCRIPTION(DRIVER_DESC);
803 MODULE_VERSION(DRIVER_VERSION);
804 MODULE_LICENSE("GPL");
805
806 #ifdef CONFIG_USB_DEBUG
807 module_param(debug, bool, S_IRUGO | S_IWUSR);
808 MODULE_PARM_DESC(debug, "Debug messages");
809 #endif
810
Support for the Chinese Samsung S3C2440 based development boards