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