?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[PATCH] Overrun in option-card USB driver
[linux-2.6/s3c2410-cpufreq.git] / drivers / usb / serial / option.c
blob5cf2b80add7aa01ede3b1a588dc5c002d6dbccb8
1 /*
2 Option Card (PCMCIA to) USB to Serial Driver
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:
13
14 2005-05-19 v0.1 Initial version, based on incomplete docs
15 and analysis of misbehavior with the standard driver
16 2005-05-20 v0.2 Extended the input buffer to avoid losing
17 random 64-byte chunks of data
18 2005-05-21 v0.3 implemented chars_in_buffer()
19 turned on low_latency
20 simplified the code somewhat
21 2005-05-24 v0.4 option_write() sometimes deadlocked under heavy load
22 removed some dead code
23 added sponsor notice
24 coding style clean-up
25 2005-06-20 v0.4.1 add missing braces :-/
26 killed end-of-line whitespace
27 2005-07-15 v0.4.2 rename WLAN product to FUSION, add FUSION2
28 2005-09-10 v0.4.3 added HUAWEI E600 card and Audiovox AirCard
29 2005-09-20 v0.4.4 increased recv buffer size: the card sometimes
30 wants to send >2000 bytes.
31 2006-04-10 v0.4.2 fixed two array overrun errors :-/
32
33 Work sponsored by: Sigos GmbH, Germany <info@sigos.de>
34
35 */
36
37 #define DRIVER_VERSION "v0.4"
38 #define DRIVER_AUTHOR "Matthias Urlichs <smurf@smurf.noris.de>"
39 #define DRIVER_DESC "Option Card (PC-Card to) USB to Serial Driver"
40
41 #include <linux/config.h>
42 #include <linux/kernel.h>
43 #include <linux/jiffies.h>
44 #include <linux/errno.h>
45 #include <linux/tty.h>
46 #include <linux/tty_flip.h>
47 #include <linux/module.h>
48 #include <linux/usb.h>
49 #include "usb-serial.h"
50
51 /* Function prototypes */
52 static int option_open(struct usb_serial_port *port, struct file *filp);
53 static void option_close(struct usb_serial_port *port, struct file *filp);
54 static int option_startup(struct usb_serial *serial);
55 static void option_shutdown(struct usb_serial *serial);
56 static void option_rx_throttle(struct usb_serial_port *port);
57 static void option_rx_unthrottle(struct usb_serial_port *port);
58 static int option_write_room(struct usb_serial_port *port);
59
60 static void option_instat_callback(struct urb *urb, struct pt_regs *regs);
61
62 static int option_write(struct usb_serial_port *port,
63 const unsigned char *buf, int count);
64
65 static int option_chars_in_buffer(struct usb_serial_port *port);
66 static int option_ioctl(struct usb_serial_port *port, struct file *file,
67 unsigned int cmd, unsigned long arg);
68 static void option_set_termios(struct usb_serial_port *port,
69 struct termios *old);
70 static void option_break_ctl(struct usb_serial_port *port, int break_state);
71 static int option_tiocmget(struct usb_serial_port *port, struct file *file);
72 static int option_tiocmset(struct usb_serial_port *port, struct file *file,
73 unsigned int set, unsigned int clear);
74 static int option_send_setup(struct usb_serial_port *port);
75
76 /* Vendor and product IDs */
77 #define OPTION_VENDOR_ID 0x0AF0
78 #define HUAWEI_VENDOR_ID 0x12D1
79 #define AUDIOVOX_VENDOR_ID 0x0F3D
80
81 #define OPTION_PRODUCT_OLD 0x5000
82 #define OPTION_PRODUCT_FUSION 0x6000
83 #define OPTION_PRODUCT_FUSION2 0x6300
84 #define HUAWEI_PRODUCT_E600 0x1001
85 #define AUDIOVOX_PRODUCT_AIRCARD 0x0112
86
87 static struct usb_device_id option_ids[] = {
88 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_OLD) },
89 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUSION) },
90 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUSION2) },
91 { USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E600) },
92 { USB_DEVICE(AUDIOVOX_VENDOR_ID, AUDIOVOX_PRODUCT_AIRCARD) },
93 { } /* Terminating entry */
94 };
95
96 MODULE_DEVICE_TABLE(usb, option_ids);
97
98 static struct usb_driver option_driver = {
99 .name = "option",
100 .probe = usb_serial_probe,
101 .disconnect = usb_serial_disconnect,
102 .id_table = option_ids,
103 .no_dynamic_id = 1,
104 };
105
106 /* The card has three separate interfaces, which the serial driver
107 * recognizes separately, thus num_port=1.
108 */
109 static struct usb_serial_driver option_3port_device = {
110 .driver = {
111 .owner = THIS_MODULE,
112 .name = "option",
113 },
114 .description = "Option 3G data card",
115 .id_table = option_ids,
116 .num_interrupt_in = NUM_DONT_CARE,
117 .num_bulk_in = NUM_DONT_CARE,
118 .num_bulk_out = NUM_DONT_CARE,
119 .num_ports = 1, /* 3, but the card reports its ports separately */
120 .open = option_open,
121 .close = option_close,
122 .write = option_write,
123 .write_room = option_write_room,
124 .chars_in_buffer = option_chars_in_buffer,
125 .throttle = option_rx_throttle,
126 .unthrottle = option_rx_unthrottle,
127 .ioctl = option_ioctl,
128 .set_termios = option_set_termios,
129 .break_ctl = option_break_ctl,
130 .tiocmget = option_tiocmget,
131 .tiocmset = option_tiocmset,
132 .attach = option_startup,
133 .shutdown = option_shutdown,
134 .read_int_callback = option_instat_callback,
135 };
136
137 #ifdef CONFIG_USB_DEBUG
138 static int debug;
139 #else
140 #define debug 0
141 #endif
142
143 /* per port private data */
144
145 #define N_IN_URB 4
146 #define N_OUT_URB 1
147 #define IN_BUFLEN 4096
148 #define OUT_BUFLEN 128
149
150 struct option_port_private {
151 /* Input endpoints and buffer for this port */
152 struct urb *in_urbs[N_IN_URB];
153 char in_buffer[N_IN_URB][IN_BUFLEN];
154 /* Output endpoints and buffer for this port */
155 struct urb *out_urbs[N_OUT_URB];
156 char out_buffer[N_OUT_URB][OUT_BUFLEN];
157
158 /* Settings for the port */
159 int rts_state; /* Handshaking pins (outputs) */
160 int dtr_state;
161 int cts_state; /* Handshaking pins (inputs) */
162 int dsr_state;
163 int dcd_state;
164 int ri_state;
165
166 unsigned long tx_start_time[N_OUT_URB];
167 };
168
169 /* Functions used by new usb-serial code. */
170 static int __init option_init(void)
171 {
172 int retval;
173 retval = usb_serial_register(&option_3port_device);
174 if (retval)
175 goto failed_3port_device_register;
176 retval = usb_register(&option_driver);
177 if (retval)
178 goto failed_driver_register;
179
180 info(DRIVER_DESC ": " DRIVER_VERSION);
181
182 return 0;
183
184 failed_driver_register:
185 usb_serial_deregister (&option_3port_device);
186 failed_3port_device_register:
187 return retval;
188 }
189
190 static void __exit option_exit(void)
191 {
192 usb_deregister (&option_driver);
193 usb_serial_deregister (&option_3port_device);
194 }
195
196 module_init(option_init);
197 module_exit(option_exit);
198
199 static void option_rx_throttle(struct usb_serial_port *port)
200 {
201 dbg("%s", __FUNCTION__);
202 }
203
204 static void option_rx_unthrottle(struct usb_serial_port *port)
205 {
206 dbg("%s", __FUNCTION__);
207 }
208
209 static void option_break_ctl(struct usb_serial_port *port, int break_state)
210 {
211 /* Unfortunately, I don't know how to send a break */
212 dbg("%s", __FUNCTION__);
213 }
214
215 static void option_set_termios(struct usb_serial_port *port,
216 struct termios *old_termios)
217 {
218 dbg("%s", __FUNCTION__);
219
220 option_send_setup(port);
221 }
222
223 static int option_tiocmget(struct usb_serial_port *port, struct file *file)
224 {
225 unsigned int value;
226 struct option_port_private *portdata;
227
228 portdata = usb_get_serial_port_data(port);
229
230 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
231 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
232 ((portdata->cts_state) ? TIOCM_CTS : 0) |
233 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
234 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
235 ((portdata->ri_state) ? TIOCM_RNG : 0);
236
237 return value;
238 }
239
240 static int option_tiocmset(struct usb_serial_port *port, struct file *file,
241 unsigned int set, unsigned int clear)
242 {
243 struct option_port_private *portdata;
244
245 portdata = usb_get_serial_port_data(port);
246
247 if (set & TIOCM_RTS)
248 portdata->rts_state = 1;
249 if (set & TIOCM_DTR)
250 portdata->dtr_state = 1;
251
252 if (clear & TIOCM_RTS)
253 portdata->rts_state = 0;
254 if (clear & TIOCM_DTR)
255 portdata->dtr_state = 0;
256 return option_send_setup(port);
257 }
258
259 static int option_ioctl(struct usb_serial_port *port, struct file *file,
260 unsigned int cmd, unsigned long arg)
261 {
262 return -ENOIOCTLCMD;
263 }
264
265 /* Write */
266 static int option_write(struct usb_serial_port *port,
267 const unsigned char *buf, int count)
268 {
269 struct option_port_private *portdata;
270 int i;
271 int left, todo;
272 struct urb *this_urb = NULL; /* spurious */
273 int err;
274
275 portdata = usb_get_serial_port_data(port);
276
277 dbg("%s: write (%d chars)", __FUNCTION__, count);
278
279 i = 0;
280 left = count;
281 for (i=0; left > 0 && i < N_OUT_URB; i++) {
282 todo = left;
283 if (todo > OUT_BUFLEN)
284 todo = OUT_BUFLEN;
285
286 this_urb = portdata->out_urbs[i];
287 if (this_urb->status == -EINPROGRESS) {
288 if (time_before(jiffies,
289 portdata->tx_start_time[i] + 10 * HZ))
290 continue;
291 usb_unlink_urb(this_urb);
292 continue;
293 }
294 if (this_urb->status != 0)
295 dbg("usb_write %p failed (err=%d)",
296 this_urb, this_urb->status);
297
298 dbg("%s: endpoint %d buf %d", __FUNCTION__,
299 usb_pipeendpoint(this_urb->pipe), i);
300
301 /* send the data */
302 memcpy (this_urb->transfer_buffer, buf, todo);
303 this_urb->transfer_buffer_length = todo;
304
305 this_urb->dev = port->serial->dev;
306 err = usb_submit_urb(this_urb, GFP_ATOMIC);
307 if (err) {
308 dbg("usb_submit_urb %p (write bulk) failed "
309 "(%d, has %d)", this_urb,
310 err, this_urb->status);
311 continue;
312 }
313 portdata->tx_start_time[i] = jiffies;
314 buf += todo;
315 left -= todo;
316 }
317
318 count -= left;
319 dbg("%s: wrote (did %d)", __FUNCTION__, count);
320 return count;
321 }
322
323 static void option_indat_callback(struct urb *urb, struct pt_regs *regs)
324 {
325 int err;
326 int endpoint;
327 struct usb_serial_port *port;
328 struct tty_struct *tty;
329 unsigned char *data = urb->transfer_buffer;
330
331 dbg("%s: %p", __FUNCTION__, urb);
332
333 endpoint = usb_pipeendpoint(urb->pipe);
334 port = (struct usb_serial_port *) urb->context;
335
336 if (urb->status) {
337 dbg("%s: nonzero status: %d on endpoint %02x.",
338 __FUNCTION__, urb->status, endpoint);
339 } else {
340 tty = port->tty;
341 if (urb->actual_length) {
342 tty_buffer_request_room(tty, urb->actual_length);
343 tty_insert_flip_string(tty, data, urb->actual_length);
344 tty_flip_buffer_push(tty);
345 } else {
346 dbg("%s: empty read urb received", __FUNCTION__);
347 }
348
349 /* Resubmit urb so we continue receiving */
350 if (port->open_count && urb->status != -ESHUTDOWN) {
351 err = usb_submit_urb(urb, GFP_ATOMIC);
352 if (err)
353 printk(KERN_ERR "%s: resubmit read urb failed. "
354 "(%d)", __FUNCTION__, err);
355 }
356 }
357 return;
358 }
359
360 static void option_outdat_callback(struct urb *urb, struct pt_regs *regs)
361 {
362 struct usb_serial_port *port;
363
364 dbg("%s", __FUNCTION__);
365
366 port = (struct usb_serial_port *) urb->context;
367
368 if (port->open_count)
369 schedule_work(&port->work);
370 }
371
372 static void option_instat_callback(struct urb *urb, struct pt_regs *regs)
373 {
374 int err;
375 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
376 struct option_port_private *portdata = usb_get_serial_port_data(port);
377 struct usb_serial *serial = port->serial;
378
379 dbg("%s", __FUNCTION__);
380 dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
381
382 if (urb->status == 0) {
383 struct usb_ctrlrequest *req_pkt =
384 (struct usb_ctrlrequest *)urb->transfer_buffer;
385
386 if (!req_pkt) {
387 dbg("%s: NULL req_pkt\n", __FUNCTION__);
388 return;
389 }
390 if ((req_pkt->bRequestType == 0xA1) &&
391 (req_pkt->bRequest == 0x20)) {
392 int old_dcd_state;
393 unsigned char signals = *((unsigned char *)
394 urb->transfer_buffer +
395 sizeof(struct usb_ctrlrequest));
396
397 dbg("%s: signal x%x", __FUNCTION__, signals);
398
399 old_dcd_state = portdata->dcd_state;
400 portdata->cts_state = 1;
401 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
402 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
403 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
404
405 if (port->tty && !C_CLOCAL(port->tty) &&
406 old_dcd_state && !portdata->dcd_state)
407 tty_hangup(port->tty);
408 } else {
409 dbg("%s: type %x req %x", __FUNCTION__,
410 req_pkt->bRequestType,req_pkt->bRequest);
411 }
412 } else
413 dbg("%s: error %d", __FUNCTION__, urb->status);
414
415 /* Resubmit urb so we continue receiving IRQ data */
416 if (urb->status != -ESHUTDOWN) {
417 urb->dev = serial->dev;
418 err = usb_submit_urb(urb, GFP_ATOMIC);
419 if (err)
420 dbg("%s: resubmit intr urb failed. (%d)",
421 __FUNCTION__, err);
422 }
423 }
424
425 static int option_write_room(struct usb_serial_port *port)
426 {
427 struct option_port_private *portdata;
428 int i;
429 int data_len = 0;
430 struct urb *this_urb;
431
432 portdata = usb_get_serial_port_data(port);
433
434 for (i=0; i < N_OUT_URB; i++) {
435 this_urb = portdata->out_urbs[i];
436 if (this_urb && this_urb->status != -EINPROGRESS)
437 data_len += OUT_BUFLEN;
438 }
439
440 dbg("%s: %d", __FUNCTION__, data_len);
441 return data_len;
442 }
443
444 static int option_chars_in_buffer(struct usb_serial_port *port)
445 {
446 struct option_port_private *portdata;
447 int i;
448 int data_len = 0;
449 struct urb *this_urb;
450
451 portdata = usb_get_serial_port_data(port);
452
453 for (i=0; i < N_OUT_URB; i++) {
454 this_urb = portdata->out_urbs[i];
455 if (this_urb && this_urb->status == -EINPROGRESS)
456 data_len += this_urb->transfer_buffer_length;
457 }
458 dbg("%s: %d", __FUNCTION__, data_len);
459 return data_len;
460 }
461
462 static int option_open(struct usb_serial_port *port, struct file *filp)
463 {
464 struct option_port_private *portdata;
465 struct usb_serial *serial = port->serial;
466 int i, err;
467 struct urb *urb;
468
469 portdata = usb_get_serial_port_data(port);
470
471 dbg("%s", __FUNCTION__);
472
473 /* Set some sane defaults */
474 portdata->rts_state = 1;
475 portdata->dtr_state = 1;
476
477 /* Reset low level data toggle and start reading from endpoints */
478 for (i = 0; i < N_IN_URB; i++) {
479 urb = portdata->in_urbs[i];
480 if (! urb)
481 continue;
482 if (urb->dev != serial->dev) {
483 dbg("%s: dev %p != %p", __FUNCTION__,
484 urb->dev, serial->dev);
485 continue;
486 }
487
488 /*
489 * make sure endpoint data toggle is synchronized with the
490 * device
491 */
492 usb_clear_halt(urb->dev, urb->pipe);
493
494 err = usb_submit_urb(urb, GFP_KERNEL);
495 if (err) {
496 dbg("%s: submit urb %d failed (%d) %d",
497 __FUNCTION__, i, err,
498 urb->transfer_buffer_length);
499 }
500 }
501
502 /* Reset low level data toggle on out endpoints */
503 for (i = 0; i < N_OUT_URB; i++) {
504 urb = portdata->out_urbs[i];
505 if (! urb)
506 continue;
507 urb->dev = serial->dev;
508 /* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
509 usb_pipeout(urb->pipe), 0); */
510 }
511
512 port->tty->low_latency = 1;
513
514 option_send_setup(port);
515
516 return (0);
517 }
518
519 static inline void stop_urb(struct urb *urb)
520 {
521 if (urb && urb->status == -EINPROGRESS)
522 usb_kill_urb(urb);
523 }
524
525 static void option_close(struct usb_serial_port *port, struct file *filp)
526 {
527 int i;
528 struct usb_serial *serial = port->serial;
529 struct option_port_private *portdata;
530
531 dbg("%s", __FUNCTION__);
532 portdata = usb_get_serial_port_data(port);
533
534 portdata->rts_state = 0;
535 portdata->dtr_state = 0;
536
537 if (serial->dev) {
538 option_send_setup(port);
539
540 /* Stop reading/writing urbs */
541 for (i = 0; i < N_IN_URB; i++)
542 stop_urb(portdata->in_urbs[i]);
543 for (i = 0; i < N_OUT_URB; i++)
544 stop_urb(portdata->out_urbs[i]);
545 }
546 port->tty = NULL;
547 }
548
549 /* Helper functions used by option_setup_urbs */
550 static struct urb *option_setup_urb(struct usb_serial *serial, int endpoint,
551 int dir, void *ctx, char *buf, int len,
552 void (*callback)(struct urb *, struct pt_regs *regs))
553 {
554 struct urb *urb;
555
556 if (endpoint == -1)
557 return NULL; /* endpoint not needed */
558
559 urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
560 if (urb == NULL) {
561 dbg("%s: alloc for endpoint %d failed.", __FUNCTION__, endpoint);
562 return NULL;
563 }
564
565 /* Fill URB using supplied data. */
566 usb_fill_bulk_urb(urb, serial->dev,
567 usb_sndbulkpipe(serial->dev, endpoint) | dir,
568 buf, len, callback, ctx);
569
570 return urb;
571 }
572
573 /* Setup urbs */
574 static void option_setup_urbs(struct usb_serial *serial)
575 {
576 int j;
577 struct usb_serial_port *port;
578 struct option_port_private *portdata;
579
580 dbg("%s", __FUNCTION__);
581
582 port = serial->port[0];
583 portdata = usb_get_serial_port_data(port);
584
585 /* Do indat endpoints first */
586 for (j = 0; j < N_IN_URB; ++j) {
587 portdata->in_urbs[j] = option_setup_urb (serial,
588 port->bulk_in_endpointAddress, USB_DIR_IN, port,
589 portdata->in_buffer[j], IN_BUFLEN, option_indat_callback);
590 }
591
592 /* outdat endpoints */
593 for (j = 0; j < N_OUT_URB; ++j) {
594 portdata->out_urbs[j] = option_setup_urb (serial,
595 port->bulk_out_endpointAddress, USB_DIR_OUT, port,
596 portdata->out_buffer[j], OUT_BUFLEN, option_outdat_callback);
597 }
598 }
599
600 static int option_send_setup(struct usb_serial_port *port)
601 {
602 struct usb_serial *serial = port->serial;
603 struct option_port_private *portdata;
604
605 dbg("%s", __FUNCTION__);
606
607 portdata = usb_get_serial_port_data(port);
608
609 if (port->tty) {
610 int val = 0;
611 if (portdata->dtr_state)
612 val |= 0x01;
613 if (portdata->rts_state)
614 val |= 0x02;
615
616 return usb_control_msg(serial->dev,
617 usb_rcvctrlpipe(serial->dev, 0),
618 0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT);
619 }
620
621 return 0;
622 }
623
624 static int option_startup(struct usb_serial *serial)
625 {
626 int i, err;
627 struct usb_serial_port *port;
628 struct option_port_private *portdata;
629
630 dbg("%s", __FUNCTION__);
631
632 /* Now setup per port private data */
633 for (i = 0; i < serial->num_ports; i++) {
634 port = serial->port[i];
635 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
636 if (!portdata) {
637 dbg("%s: kmalloc for option_port_private (%d) failed!.",
638 __FUNCTION__, i);
639 return (1);
640 }
641
642 usb_set_serial_port_data(port, portdata);
643
644 if (! port->interrupt_in_urb)
645 continue;
646 err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
647 if (err)
648 dbg("%s: submit irq_in urb failed %d",
649 __FUNCTION__, err);
650 }
651
652 option_setup_urbs(serial);
653
654 return (0);
655 }
656
657 static void option_shutdown(struct usb_serial *serial)
658 {
659 int i, j;
660 struct usb_serial_port *port;
661 struct option_port_private *portdata;
662
663 dbg("%s", __FUNCTION__);
664
665 /* Stop reading/writing urbs */
666 for (i = 0; i < serial->num_ports; ++i) {
667 port = serial->port[i];
668 portdata = usb_get_serial_port_data(port);
669 for (j = 0; j < N_IN_URB; j++)
670 stop_urb(portdata->in_urbs[j]);
671 for (j = 0; j < N_OUT_URB; j++)
672 stop_urb(portdata->out_urbs[j]);
673 }
674
675 /* Now free them */
676 for (i = 0; i < serial->num_ports; ++i) {
677 port = serial->port[i];
678 portdata = usb_get_serial_port_data(port);
679
680 for (j = 0; j < N_IN_URB; j++) {
681 if (portdata->in_urbs[j]) {
682 usb_free_urb(portdata->in_urbs[j]);
683 portdata->in_urbs[j] = NULL;
684 }
685 }
686 for (j = 0; j < N_OUT_URB; j++) {
687 if (portdata->out_urbs[j]) {
688 usb_free_urb(portdata->out_urbs[j]);
689 portdata->out_urbs[j] = NULL;
690 }
691 }
692 }
693
694 /* Now free per port private data */
695 for (i = 0; i < serial->num_ports; i++) {
696 port = serial->port[i];
697 kfree(usb_get_serial_port_data(port));
698 }
699 }
700
701 MODULE_AUTHOR(DRIVER_AUTHOR);
702 MODULE_DESCRIPTION(DRIVER_DESC);
703 MODULE_VERSION(DRIVER_VERSION);
704 MODULE_LICENSE("GPL");
705
706 #ifdef CONFIG_USB_DEBUG
707 module_param(debug, bool, S_IRUGO | S_IWUSR);
708 MODULE_PARM_DESC(debug, "Debug messages");
709 #endif
710
cpufreq for S3C2410