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x86: disable BTS ptrace extensions for now
[wrt350n-kernel.git] / drivers / usb / serial / option.c
blobaf2674c57414c0acde52258f97dcf795f8215cf8
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 #define HUAWEI_PRODUCT_E220BIS 0x1004
112
113 #define NOVATELWIRELESS_VENDOR_ID 0x1410
114 #define DELL_VENDOR_ID 0x413C
115
116 #define KYOCERA_VENDOR_ID 0x0c88
117 #define KYOCERA_PRODUCT_KPC680 0x180a
118
119 #define ANYDATA_VENDOR_ID 0x16d5
120 #define ANYDATA_PRODUCT_ADU_E100A 0x6501
121 #define ANYDATA_PRODUCT_ADU_500A 0x6502
122
123 #define BANDRICH_VENDOR_ID 0x1A8D
124 #define BANDRICH_PRODUCT_C100_1 0x1002
125 #define BANDRICH_PRODUCT_C100_2 0x1003
126
127 #define QUALCOMM_VENDOR_ID 0x05C6
128
129 static struct usb_device_id option_ids[] = {
130 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COLT) },
131 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA) },
132 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_LIGHT) },
133 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_QUAD) },
134 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_QUAD_LIGHT) },
135 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS) },
136 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_LIGHT) },
137 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_QUAD) },
138 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_QUAD_LIGHT) },
139 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COBRA) },
140 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COBRA_BUS) },
141 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_VIPER) },
142 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_VIPER_BUS) },
143 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_GT_MAX_READY) },
144 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_GT_MAX) },
145 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_LIGHT) },
146 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_GT) },
147 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_EX) },
148 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_LIGHT) },
149 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_GT) },
150 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_EX) },
151 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_KOI_MODEM) },
152 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_KOI_NETWORK) },
153 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_SCORPION_MODEM) },
154 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_SCORPION_NETWORK) },
155 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM) },
156 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK) },
157 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_LITE) },
158 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_GT) },
159 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_EX) },
160 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_LITE) },
161 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_GT) },
162 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_EX) },
163 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_KOI_MODEM) },
164 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_KOI_NETWORK) },
165 { USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E600) },
166 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E220, 0xff, 0xff, 0xff) },
167 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E220BIS, 0xff, 0xff, 0xff) },
168 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1100) }, /* Novatel Merlin XS620/S640 */
169 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1110) }, /* Novatel Merlin S620 */
170 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1120) }, /* Novatel Merlin EX720 */
171 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1130) }, /* Novatel Merlin S720 */
172 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1400) }, /* Novatel U730 */
173 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1410) }, /* Novatel U740 */
174 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1420) }, /* Novatel EU870 */
175 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1430) }, /* Novatel Merlin XU870 HSDPA/3G */
176 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2100) }, /* Novatel EV620 CDMA/EV-DO */
177 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2110) }, /* Novatel Merlin ES620 / Merlin ES720 / Ovation U720 */
178 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2130) }, /* Novatel Merlin ES620 SM Bus */
179 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2410) }, /* Novatel EU740 */
180 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x4100) }, /* Novatel U727 */
181 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x4400) }, /* Novatel MC950 */
182 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x5010) }, /* Novatel U727 */
183 { USB_DEVICE(DELL_VENDOR_ID, 0x8114) }, /* Dell Wireless 5700 Mobile Broadband CDMA/EVDO Mini-Card == Novatel Expedite EV620 CDMA/EV-DO */
184 { USB_DEVICE(DELL_VENDOR_ID, 0x8115) }, /* Dell Wireless 5500 Mobile Broadband HSDPA Mini-Card == Novatel Expedite EU740 HSDPA/3G */
185 { USB_DEVICE(DELL_VENDOR_ID, 0x8116) }, /* Dell Wireless 5505 Mobile Broadband HSDPA Mini-Card == Novatel Expedite EU740 HSDPA/3G */
186 { USB_DEVICE(DELL_VENDOR_ID, 0x8117) }, /* Dell Wireless 5700 Mobile Broadband CDMA/EVDO ExpressCard == Novatel Merlin XV620 CDMA/EV-DO */
187 { USB_DEVICE(DELL_VENDOR_ID, 0x8118) }, /* Dell Wireless 5510 Mobile Broadband HSDPA ExpressCard == Novatel Merlin XU870 HSDPA/3G */
188 { USB_DEVICE(DELL_VENDOR_ID, 0x8128) }, /* Dell Wireless 5700 Mobile Broadband CDMA/EVDO Mini-Card == Novatel Expedite E720 CDMA/EV-DO */
189 { USB_DEVICE(DELL_VENDOR_ID, 0x8129) }, /* Dell Wireless 5700 Mobile Broadband CDMA/EVDO Mini-Card == Novatel Expedite ET620 CDMA/EV-DO */
190 { USB_DEVICE(DELL_VENDOR_ID, 0x8133) }, /* Dell Wireless 5720 == Novatel EV620 CDMA/EV-DO */
191 { USB_DEVICE(DELL_VENDOR_ID, 0x8136) }, /* Dell Wireless HSDPA 5520 == Novatel Expedite EU860D */
192 { USB_DEVICE(DELL_VENDOR_ID, 0x8137) }, /* Dell Wireless HSDPA 5520 */
193 { USB_DEVICE(ANYDATA_VENDOR_ID, ANYDATA_PRODUCT_ADU_E100A) },
194 { USB_DEVICE(ANYDATA_VENDOR_ID, ANYDATA_PRODUCT_ADU_500A) },
195 { USB_DEVICE(BANDRICH_VENDOR_ID, BANDRICH_PRODUCT_C100_1) },
196 { USB_DEVICE(BANDRICH_VENDOR_ID, BANDRICH_PRODUCT_C100_2) },
197 { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_PRODUCT_KPC680) },
198 { USB_DEVICE(QUALCOMM_VENDOR_ID, 0x6613)}, /* Onda H600/ZTE MF330 */
199 { } /* Terminating entry */
200 };
201 MODULE_DEVICE_TABLE(usb, option_ids);
202
203 static struct usb_driver option_driver = {
204 .name = "option",
205 .probe = usb_serial_probe,
206 .disconnect = usb_serial_disconnect,
207 .id_table = option_ids,
208 .no_dynamic_id = 1,
209 };
210
211 /* The card has three separate interfaces, which the serial driver
212 * recognizes separately, thus num_port=1.
213 */
214
215 static struct usb_serial_driver option_1port_device = {
216 .driver = {
217 .owner = THIS_MODULE,
218 .name = "option1",
219 },
220 .description = "GSM modem (1-port)",
221 .usb_driver = &option_driver,
222 .id_table = option_ids,
223 .num_interrupt_in = NUM_DONT_CARE,
224 .num_bulk_in = NUM_DONT_CARE,
225 .num_bulk_out = NUM_DONT_CARE,
226 .num_ports = 1,
227 .open = option_open,
228 .close = option_close,
229 .write = option_write,
230 .write_room = option_write_room,
231 .chars_in_buffer = option_chars_in_buffer,
232 .throttle = option_rx_throttle,
233 .unthrottle = option_rx_unthrottle,
234 .ioctl = option_ioctl,
235 .set_termios = option_set_termios,
236 .break_ctl = option_break_ctl,
237 .tiocmget = option_tiocmget,
238 .tiocmset = option_tiocmset,
239 .attach = option_startup,
240 .shutdown = option_shutdown,
241 .read_int_callback = option_instat_callback,
242 };
243
244 #ifdef CONFIG_USB_DEBUG
245 static int debug;
246 #else
247 #define debug 0
248 #endif
249
250 /* per port private data */
251
252 #define N_IN_URB 4
253 #define N_OUT_URB 1
254 #define IN_BUFLEN 4096
255 #define OUT_BUFLEN 128
256
257 struct option_port_private {
258 /* Input endpoints and buffer for this port */
259 struct urb *in_urbs[N_IN_URB];
260 u8 *in_buffer[N_IN_URB];
261 /* Output endpoints and buffer for this port */
262 struct urb *out_urbs[N_OUT_URB];
263 u8 *out_buffer[N_OUT_URB];
264 unsigned long out_busy; /* Bit vector of URBs in use */
265
266 /* Settings for the port */
267 int rts_state; /* Handshaking pins (outputs) */
268 int dtr_state;
269 int cts_state; /* Handshaking pins (inputs) */
270 int dsr_state;
271 int dcd_state;
272 int ri_state;
273
274 unsigned long tx_start_time[N_OUT_URB];
275 };
276
277 /* Functions used by new usb-serial code. */
278 static int __init option_init(void)
279 {
280 int retval;
281 retval = usb_serial_register(&option_1port_device);
282 if (retval)
283 goto failed_1port_device_register;
284 retval = usb_register(&option_driver);
285 if (retval)
286 goto failed_driver_register;
287
288 info(DRIVER_DESC ": " DRIVER_VERSION);
289
290 return 0;
291
292 failed_driver_register:
293 usb_serial_deregister (&option_1port_device);
294 failed_1port_device_register:
295 return retval;
296 }
297
298 static void __exit option_exit(void)
299 {
300 usb_deregister (&option_driver);
301 usb_serial_deregister (&option_1port_device);
302 }
303
304 module_init(option_init);
305 module_exit(option_exit);
306
307 static void option_rx_throttle(struct usb_serial_port *port)
308 {
309 dbg("%s", __FUNCTION__);
310 }
311
312 static void option_rx_unthrottle(struct usb_serial_port *port)
313 {
314 dbg("%s", __FUNCTION__);
315 }
316
317 static void option_break_ctl(struct usb_serial_port *port, int break_state)
318 {
319 /* Unfortunately, I don't know how to send a break */
320 dbg("%s", __FUNCTION__);
321 }
322
323 static void option_set_termios(struct usb_serial_port *port,
324 struct ktermios *old_termios)
325 {
326 dbg("%s", __FUNCTION__);
327 /* Doesn't support option setting */
328 tty_termios_copy_hw(port->tty->termios, old_termios);
329 option_send_setup(port);
330 }
331
332 static int option_tiocmget(struct usb_serial_port *port, struct file *file)
333 {
334 unsigned int value;
335 struct option_port_private *portdata;
336
337 portdata = usb_get_serial_port_data(port);
338
339 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
340 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
341 ((portdata->cts_state) ? TIOCM_CTS : 0) |
342 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
343 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
344 ((portdata->ri_state) ? TIOCM_RNG : 0);
345
346 return value;
347 }
348
349 static int option_tiocmset(struct usb_serial_port *port, struct file *file,
350 unsigned int set, unsigned int clear)
351 {
352 struct option_port_private *portdata;
353
354 portdata = usb_get_serial_port_data(port);
355
356 if (set & TIOCM_RTS)
357 portdata->rts_state = 1;
358 if (set & TIOCM_DTR)
359 portdata->dtr_state = 1;
360
361 if (clear & TIOCM_RTS)
362 portdata->rts_state = 0;
363 if (clear & TIOCM_DTR)
364 portdata->dtr_state = 0;
365 return option_send_setup(port);
366 }
367
368 static int option_ioctl(struct usb_serial_port *port, struct file *file,
369 unsigned int cmd, unsigned long arg)
370 {
371 return -ENOIOCTLCMD;
372 }
373
374 /* Write */
375 static int option_write(struct usb_serial_port *port,
376 const unsigned char *buf, int count)
377 {
378 struct option_port_private *portdata;
379 int i;
380 int left, todo;
381 struct urb *this_urb = NULL; /* spurious */
382 int err;
383
384 portdata = usb_get_serial_port_data(port);
385
386 dbg("%s: write (%d chars)", __FUNCTION__, count);
387
388 i = 0;
389 left = count;
390 for (i=0; left > 0 && i < N_OUT_URB; i++) {
391 todo = left;
392 if (todo > OUT_BUFLEN)
393 todo = OUT_BUFLEN;
394
395 this_urb = portdata->out_urbs[i];
396 if (test_and_set_bit(i, &portdata->out_busy)) {
397 if (time_before(jiffies,
398 portdata->tx_start_time[i] + 10 * HZ))
399 continue;
400 usb_unlink_urb(this_urb);
401 continue;
402 }
403 if (this_urb->status != 0)
404 dbg("usb_write %p failed (err=%d)",
405 this_urb, this_urb->status);
406
407 dbg("%s: endpoint %d buf %d", __FUNCTION__,
408 usb_pipeendpoint(this_urb->pipe), i);
409
410 /* send the data */
411 memcpy (this_urb->transfer_buffer, buf, todo);
412 this_urb->transfer_buffer_length = todo;
413
414 this_urb->dev = port->serial->dev;
415 err = usb_submit_urb(this_urb, GFP_ATOMIC);
416 if (err) {
417 dbg("usb_submit_urb %p (write bulk) failed "
418 "(%d, has %d)", this_urb,
419 err, this_urb->status);
420 clear_bit(i, &portdata->out_busy);
421 continue;
422 }
423 portdata->tx_start_time[i] = jiffies;
424 buf += todo;
425 left -= todo;
426 }
427
428 count -= left;
429 dbg("%s: wrote (did %d)", __FUNCTION__, count);
430 return count;
431 }
432
433 static void option_indat_callback(struct urb *urb)
434 {
435 int err;
436 int endpoint;
437 struct usb_serial_port *port;
438 struct tty_struct *tty;
439 unsigned char *data = urb->transfer_buffer;
440 int status = urb->status;
441
442 dbg("%s: %p", __FUNCTION__, urb);
443
444 endpoint = usb_pipeendpoint(urb->pipe);
445 port = (struct usb_serial_port *) urb->context;
446
447 if (status) {
448 dbg("%s: nonzero status: %d on endpoint %02x.",
449 __FUNCTION__, status, endpoint);
450 } else {
451 tty = port->tty;
452 if (urb->actual_length) {
453 tty_buffer_request_room(tty, urb->actual_length);
454 tty_insert_flip_string(tty, data, urb->actual_length);
455 tty_flip_buffer_push(tty);
456 } else {
457 dbg("%s: empty read urb received", __FUNCTION__);
458 }
459
460 /* Resubmit urb so we continue receiving */
461 if (port->open_count && status != -ESHUTDOWN) {
462 err = usb_submit_urb(urb, GFP_ATOMIC);
463 if (err)
464 printk(KERN_ERR "%s: resubmit read urb failed. "
465 "(%d)", __FUNCTION__, err);
466 }
467 }
468 return;
469 }
470
471 static void option_outdat_callback(struct urb *urb)
472 {
473 struct usb_serial_port *port;
474 struct option_port_private *portdata;
475 int i;
476
477 dbg("%s", __FUNCTION__);
478
479 port = (struct usb_serial_port *) urb->context;
480
481 usb_serial_port_softint(port);
482
483 portdata = usb_get_serial_port_data(port);
484 for (i = 0; i < N_OUT_URB; ++i) {
485 if (portdata->out_urbs[i] == urb) {
486 smp_mb__before_clear_bit();
487 clear_bit(i, &portdata->out_busy);
488 break;
489 }
490 }
491 }
492
493 static void option_instat_callback(struct urb *urb)
494 {
495 int err;
496 int status = urb->status;
497 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
498 struct option_port_private *portdata = usb_get_serial_port_data(port);
499 struct usb_serial *serial = port->serial;
500
501 dbg("%s", __FUNCTION__);
502 dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
503
504 if (status == 0) {
505 struct usb_ctrlrequest *req_pkt =
506 (struct usb_ctrlrequest *)urb->transfer_buffer;
507
508 if (!req_pkt) {
509 dbg("%s: NULL req_pkt\n", __FUNCTION__);
510 return;
511 }
512 if ((req_pkt->bRequestType == 0xA1) &&
513 (req_pkt->bRequest == 0x20)) {
514 int old_dcd_state;
515 unsigned char signals = *((unsigned char *)
516 urb->transfer_buffer +
517 sizeof(struct usb_ctrlrequest));
518
519 dbg("%s: signal x%x", __FUNCTION__, signals);
520
521 old_dcd_state = portdata->dcd_state;
522 portdata->cts_state = 1;
523 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
524 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
525 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
526
527 if (port->tty && !C_CLOCAL(port->tty) &&
528 old_dcd_state && !portdata->dcd_state)
529 tty_hangup(port->tty);
530 } else {
531 dbg("%s: type %x req %x", __FUNCTION__,
532 req_pkt->bRequestType,req_pkt->bRequest);
533 }
534 } else
535 dbg("%s: error %d", __FUNCTION__, status);
536
537 /* Resubmit urb so we continue receiving IRQ data */
538 if (status != -ESHUTDOWN) {
539 urb->dev = serial->dev;
540 err = usb_submit_urb(urb, GFP_ATOMIC);
541 if (err)
542 dbg("%s: resubmit intr urb failed. (%d)",
543 __FUNCTION__, err);
544 }
545 }
546
547 static int option_write_room(struct usb_serial_port *port)
548 {
549 struct option_port_private *portdata;
550 int i;
551 int data_len = 0;
552 struct urb *this_urb;
553
554 portdata = usb_get_serial_port_data(port);
555
556 for (i=0; i < N_OUT_URB; i++) {
557 this_urb = portdata->out_urbs[i];
558 if (this_urb && !test_bit(i, &portdata->out_busy))
559 data_len += OUT_BUFLEN;
560 }
561
562 dbg("%s: %d", __FUNCTION__, data_len);
563 return data_len;
564 }
565
566 static int option_chars_in_buffer(struct usb_serial_port *port)
567 {
568 struct option_port_private *portdata;
569 int i;
570 int data_len = 0;
571 struct urb *this_urb;
572
573 portdata = usb_get_serial_port_data(port);
574
575 for (i=0; i < N_OUT_URB; i++) {
576 this_urb = portdata->out_urbs[i];
577 if (this_urb && test_bit(i, &portdata->out_busy))
578 data_len += this_urb->transfer_buffer_length;
579 }
580 dbg("%s: %d", __FUNCTION__, data_len);
581 return data_len;
582 }
583
584 static int option_open(struct usb_serial_port *port, struct file *filp)
585 {
586 struct option_port_private *portdata;
587 struct usb_serial *serial = port->serial;
588 int i, err;
589 struct urb *urb;
590
591 portdata = usb_get_serial_port_data(port);
592
593 dbg("%s", __FUNCTION__);
594
595 /* Set some sane defaults */
596 portdata->rts_state = 1;
597 portdata->dtr_state = 1;
598
599 /* Reset low level data toggle and start reading from endpoints */
600 for (i = 0; i < N_IN_URB; i++) {
601 urb = portdata->in_urbs[i];
602 if (! urb)
603 continue;
604 if (urb->dev != serial->dev) {
605 dbg("%s: dev %p != %p", __FUNCTION__,
606 urb->dev, serial->dev);
607 continue;
608 }
609
610 /*
611 * make sure endpoint data toggle is synchronized with the
612 * device
613 */
614 usb_clear_halt(urb->dev, urb->pipe);
615
616 err = usb_submit_urb(urb, GFP_KERNEL);
617 if (err) {
618 dbg("%s: submit urb %d failed (%d) %d",
619 __FUNCTION__, i, err,
620 urb->transfer_buffer_length);
621 }
622 }
623
624 /* Reset low level data toggle on out endpoints */
625 for (i = 0; i < N_OUT_URB; i++) {
626 urb = portdata->out_urbs[i];
627 if (! urb)
628 continue;
629 urb->dev = serial->dev;
630 /* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
631 usb_pipeout(urb->pipe), 0); */
632 }
633
634 port->tty->low_latency = 1;
635
636 option_send_setup(port);
637
638 return (0);
639 }
640
641 static void option_close(struct usb_serial_port *port, struct file *filp)
642 {
643 int i;
644 struct usb_serial *serial = port->serial;
645 struct option_port_private *portdata;
646
647 dbg("%s", __FUNCTION__);
648 portdata = usb_get_serial_port_data(port);
649
650 portdata->rts_state = 0;
651 portdata->dtr_state = 0;
652
653 if (serial->dev) {
654 mutex_lock(&serial->disc_mutex);
655 if (!serial->disconnected)
656 option_send_setup(port);
657 mutex_unlock(&serial->disc_mutex);
658
659 /* Stop reading/writing urbs */
660 for (i = 0; i < N_IN_URB; i++)
661 usb_kill_urb(portdata->in_urbs[i]);
662 for (i = 0; i < N_OUT_URB; i++)
663 usb_kill_urb(portdata->out_urbs[i]);
664 }
665 port->tty = NULL;
666 }
667
668 /* Helper functions used by option_setup_urbs */
669 static struct urb *option_setup_urb(struct usb_serial *serial, int endpoint,
670 int dir, void *ctx, char *buf, int len,
671 void (*callback)(struct urb *))
672 {
673 struct urb *urb;
674
675 if (endpoint == -1)
676 return NULL; /* endpoint not needed */
677
678 urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
679 if (urb == NULL) {
680 dbg("%s: alloc for endpoint %d failed.", __FUNCTION__, endpoint);
681 return NULL;
682 }
683
684 /* Fill URB using supplied data. */
685 usb_fill_bulk_urb(urb, serial->dev,
686 usb_sndbulkpipe(serial->dev, endpoint) | dir,
687 buf, len, callback, ctx);
688
689 return urb;
690 }
691
692 /* Setup urbs */
693 static void option_setup_urbs(struct usb_serial *serial)
694 {
695 int i,j;
696 struct usb_serial_port *port;
697 struct option_port_private *portdata;
698
699 dbg("%s", __FUNCTION__);
700
701 for (i = 0; i < serial->num_ports; i++) {
702 port = serial->port[i];
703 portdata = usb_get_serial_port_data(port);
704
705 /* Do indat endpoints first */
706 for (j = 0; j < N_IN_URB; ++j) {
707 portdata->in_urbs[j] = option_setup_urb (serial,
708 port->bulk_in_endpointAddress, USB_DIR_IN, port,
709 portdata->in_buffer[j], IN_BUFLEN, option_indat_callback);
710 }
711
712 /* outdat endpoints */
713 for (j = 0; j < N_OUT_URB; ++j) {
714 portdata->out_urbs[j] = option_setup_urb (serial,
715 port->bulk_out_endpointAddress, USB_DIR_OUT, port,
716 portdata->out_buffer[j], OUT_BUFLEN, option_outdat_callback);
717 }
718 }
719 }
720
721 static int option_send_setup(struct usb_serial_port *port)
722 {
723 struct usb_serial *serial = port->serial;
724 struct option_port_private *portdata;
725
726 dbg("%s", __FUNCTION__);
727
728 if (port->number != 0)
729 return 0;
730
731 portdata = usb_get_serial_port_data(port);
732
733 if (port->tty) {
734 int val = 0;
735 if (portdata->dtr_state)
736 val |= 0x01;
737 if (portdata->rts_state)
738 val |= 0x02;
739
740 return usb_control_msg(serial->dev,
741 usb_rcvctrlpipe(serial->dev, 0),
742 0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT);
743 }
744
745 return 0;
746 }
747
748 static int option_startup(struct usb_serial *serial)
749 {
750 int i, j, err;
751 struct usb_serial_port *port;
752 struct option_port_private *portdata;
753 u8 *buffer;
754
755 dbg("%s", __FUNCTION__);
756
757 /* Now setup per port private data */
758 for (i = 0; i < serial->num_ports; i++) {
759 port = serial->port[i];
760 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
761 if (!portdata) {
762 dbg("%s: kmalloc for option_port_private (%d) failed!.",
763 __FUNCTION__, i);
764 return (1);
765 }
766
767 for (j = 0; j < N_IN_URB; j++) {
768 buffer = (u8 *)__get_free_page(GFP_KERNEL);
769 if (!buffer)
770 goto bail_out_error;
771 portdata->in_buffer[j] = buffer;
772 }
773
774 for (j = 0; j < N_OUT_URB; j++) {
775 buffer = kmalloc(OUT_BUFLEN, GFP_KERNEL);
776 if (!buffer)
777 goto bail_out_error2;
778 portdata->out_buffer[j] = buffer;
779 }
780
781 usb_set_serial_port_data(port, portdata);
782
783 if (! port->interrupt_in_urb)
784 continue;
785 err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
786 if (err)
787 dbg("%s: submit irq_in urb failed %d",
788 __FUNCTION__, err);
789 }
790
791 option_setup_urbs(serial);
792
793 return (0);
794
795 bail_out_error2:
796 for (j = 0; j < N_OUT_URB; j++)
797 kfree(portdata->out_buffer[j]);
798 bail_out_error:
799 for (j = 0; j < N_IN_URB; j++)
800 if (portdata->in_buffer[j])
801 free_page((unsigned long)portdata->in_buffer[j]);
802 kfree(portdata);
803 return 1;
804 }
805
806 static void option_shutdown(struct usb_serial *serial)
807 {
808 int i, j;
809 struct usb_serial_port *port;
810 struct option_port_private *portdata;
811
812 dbg("%s", __FUNCTION__);
813
814 /* Stop reading/writing urbs */
815 for (i = 0; i < serial->num_ports; ++i) {
816 port = serial->port[i];
817 portdata = usb_get_serial_port_data(port);
818 for (j = 0; j < N_IN_URB; j++)
819 usb_kill_urb(portdata->in_urbs[j]);
820 for (j = 0; j < N_OUT_URB; j++)
821 usb_kill_urb(portdata->out_urbs[j]);
822 }
823
824 /* Now free them */
825 for (i = 0; i < serial->num_ports; ++i) {
826 port = serial->port[i];
827 portdata = usb_get_serial_port_data(port);
828
829 for (j = 0; j < N_IN_URB; j++) {
830 if (portdata->in_urbs[j]) {
831 usb_free_urb(portdata->in_urbs[j]);
832 free_page((unsigned long)portdata->in_buffer[j]);
833 portdata->in_urbs[j] = NULL;
834 }
835 }
836 for (j = 0; j < N_OUT_URB; j++) {
837 if (portdata->out_urbs[j]) {
838 usb_free_urb(portdata->out_urbs[j]);
839 kfree(portdata->out_buffer[j]);
840 portdata->out_urbs[j] = NULL;
841 }
842 }
843 }
844
845 /* Now free per port private data */
846 for (i = 0; i < serial->num_ports; i++) {
847 port = serial->port[i];
848 kfree(usb_get_serial_port_data(port));
849 }
850 }
851
852 MODULE_AUTHOR(DRIVER_AUTHOR);
853 MODULE_DESCRIPTION(DRIVER_DESC);
854 MODULE_VERSION(DRIVER_VERSION);
855 MODULE_LICENSE("GPL");
856
857 #ifdef CONFIG_USB_DEBUG
858 module_param(debug, bool, S_IRUGO | S_IWUSR);
859 MODULE_PARM_DESC(debug, "Debug messages");
860 #endif
861
WRT350N Kernel Patches