4ee657eaaa0ba8289b01a199167112d4cafa9353
[linux-2.6.git] / 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         .owner      = THIS_MODULE,
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, wich 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 i, 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                         for (i = 0; i < urb->actual_length ; ++i) {
343                                 if (tty->flip.count >= TTY_FLIPBUF_SIZE)
344                                         tty_flip_buffer_push(tty);
345                                 tty_insert_flip_char(tty, data[i], 0);
346                         }
347                         tty_flip_buffer_push(tty);
348                 } else {
349                         dbg("%s: empty read urb received", __FUNCTION__);
350                 }
351
352                 /* Resubmit urb so we continue receiving */
353                 if (port->open_count && urb->status != -ESHUTDOWN) {
354                         err = usb_submit_urb(urb, GFP_ATOMIC);
355                         if (err)
356                                 printk(KERN_ERR "%s: resubmit read urb failed. "
357                                         "(%d)", __FUNCTION__, err);
358                 }
359         }
360         return;
361 }
362
363 static void option_outdat_callback(struct urb *urb, struct pt_regs *regs)
364 {
365         struct usb_serial_port *port;
366
367         dbg("%s", __FUNCTION__);
368
369         port = (struct usb_serial_port *) urb->context;
370
371         if (port->open_count)
372                 schedule_work(&port->work);
373 }
374
375 static void option_instat_callback(struct urb *urb, struct pt_regs *regs)
376 {
377         int err;
378         struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
379         struct option_port_private *portdata = usb_get_serial_port_data(port);
380         struct usb_serial *serial = port->serial;
381
382         dbg("%s", __FUNCTION__);
383         dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
384
385         if (urb->status == 0) {
386                 struct usb_ctrlrequest *req_pkt =
387                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
388
389                 if (!req_pkt) {
390                         dbg("%s: NULL req_pkt\n", __FUNCTION__);
391                         return;
392                 }
393                 if ((req_pkt->bRequestType == 0xA1) &&
394                                 (req_pkt->bRequest == 0x20)) {
395                         int old_dcd_state;
396                         unsigned char signals = *((unsigned char *)
397                                         urb->transfer_buffer +
398                                         sizeof(struct usb_ctrlrequest));
399
400                         dbg("%s: signal x%x", __FUNCTION__, signals);
401
402                         old_dcd_state = portdata->dcd_state;
403                         portdata->cts_state = 1;
404                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
405                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
406                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
407
408                         if (port->tty && !C_CLOCAL(port->tty) &&
409                                         old_dcd_state && !portdata->dcd_state)
410                                 tty_hangup(port->tty);
411                 } else {
412                         dbg("%s: type %x req %x", __FUNCTION__,
413                                 req_pkt->bRequestType,req_pkt->bRequest);
414                 }
415         } else
416                 dbg("%s: error %d", __FUNCTION__, urb->status);
417
418         /* Resubmit urb so we continue receiving IRQ data */
419         if (urb->status != -ESHUTDOWN) {
420                 urb->dev = serial->dev;
421                 err = usb_submit_urb(urb, GFP_ATOMIC);
422                 if (err)
423                         dbg("%s: resubmit intr urb failed. (%d)",
424                                 __FUNCTION__, err);
425         }
426 }
427
428 static int option_write_room(struct usb_serial_port *port)
429 {
430         struct option_port_private *portdata;
431         int i;
432         int data_len = 0;
433         struct urb *this_urb;
434
435         portdata = usb_get_serial_port_data(port);
436
437         for (i=0; i < N_OUT_URB; i++) {
438                 this_urb = portdata->out_urbs[i];
439                 if (this_urb && this_urb->status != -EINPROGRESS)
440                         data_len += OUT_BUFLEN;
441         }
442
443         dbg("%s: %d", __FUNCTION__, data_len);
444         return data_len;
445 }
446
447 static int option_chars_in_buffer(struct usb_serial_port *port)
448 {
449         struct option_port_private *portdata;
450         int i;
451         int data_len = 0;
452         struct urb *this_urb;
453
454         portdata = usb_get_serial_port_data(port);
455
456         for (i=0; i < N_OUT_URB; i++) {
457                 this_urb = portdata->out_urbs[i];
458                 if (this_urb && this_urb->status == -EINPROGRESS)
459                         data_len += this_urb->transfer_buffer_length;
460         }
461         dbg("%s: %d", __FUNCTION__, data_len);
462         return data_len;
463 }
464
465 static int option_open(struct usb_serial_port *port, struct file *filp)
466 {
467         struct option_port_private *portdata;
468         struct usb_serial *serial = port->serial;
469         int i, err;
470         struct urb *urb;
471
472         portdata = usb_get_serial_port_data(port);
473
474         dbg("%s", __FUNCTION__);
475
476         /* Set some sane defaults */
477         portdata->rts_state = 1;
478         portdata->dtr_state = 1;
479
480         /* Reset low level data toggle and start reading from endpoints */
481         for (i = 0; i < N_IN_URB; i++) {
482                 urb = portdata->in_urbs[i];
483                 if (! urb)
484                         continue;
485                 if (urb->dev != serial->dev) {
486                         dbg("%s: dev %p != %p", __FUNCTION__,
487                                 urb->dev, serial->dev);
488                         continue;
489                 }
490
491                 /*
492                  * make sure endpoint data toggle is synchronized with the
493                  * device
494                  */
495                 usb_clear_halt(urb->dev, urb->pipe);
496
497                 err = usb_submit_urb(urb, GFP_KERNEL);
498                 if (err) {
499                         dbg("%s: submit urb %d failed (%d) %d",
500                                 __FUNCTION__, i, err,
501                                 urb->transfer_buffer_length);
502                 }
503         }
504
505         /* Reset low level data toggle on out endpoints */
506         for (i = 0; i < N_OUT_URB; i++) {
507                 urb = portdata->out_urbs[i];
508                 if (! urb)
509                         continue;
510                 urb->dev = serial->dev;
511                 /* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
512                                 usb_pipeout(urb->pipe), 0); */
513         }
514
515         port->tty->low_latency = 1;
516
517         option_send_setup(port);
518
519         return (0);
520 }
521
522 static inline void stop_urb(struct urb *urb)
523 {
524         if (urb && urb->status == -EINPROGRESS)
525                 usb_kill_urb(urb);
526 }
527
528 static void option_close(struct usb_serial_port *port, struct file *filp)
529 {
530         int i;
531         struct usb_serial *serial = port->serial;
532         struct option_port_private *portdata;
533
534         dbg("%s", __FUNCTION__);
535         portdata = usb_get_serial_port_data(port);
536
537         portdata->rts_state = 0;
538         portdata->dtr_state = 0;
539
540         if (serial->dev) {
541                 option_send_setup(port);
542
543                 /* Stop reading/writing urbs */
544                 for (i = 0; i < N_IN_URB; i++)
545                         stop_urb(portdata->in_urbs[i]);
546                 for (i = 0; i < N_OUT_URB; i++)
547                         stop_urb(portdata->out_urbs[i]);
548         }
549         port->tty = NULL;
550 }
551
552 /* Helper functions used by option_setup_urbs */
553 static struct urb *option_setup_urb(struct usb_serial *serial, int endpoint,
554                 int dir, void *ctx, char *buf, int len,
555                 void (*callback)(struct urb *, struct pt_regs *regs))
556 {
557         struct urb *urb;
558
559         if (endpoint == -1)
560                 return NULL;            /* endpoint not needed */
561
562         urb = usb_alloc_urb(0, GFP_KERNEL);             /* No ISO */
563         if (urb == NULL) {
564                 dbg("%s: alloc for endpoint %d failed.", __FUNCTION__, endpoint);
565                 return NULL;
566         }
567
568                 /* Fill URB using supplied data. */
569         usb_fill_bulk_urb(urb, serial->dev,
570                       usb_sndbulkpipe(serial->dev, endpoint) | dir,
571                       buf, len, callback, ctx);
572
573         return urb;
574 }
575
576 /* Setup urbs */
577 static void option_setup_urbs(struct usb_serial *serial)
578 {
579         int j;
580         struct usb_serial_port *port;
581         struct option_port_private *portdata;
582
583         dbg("%s", __FUNCTION__);
584
585         port = serial->port[0];
586         portdata = usb_get_serial_port_data(port);
587
588         /* Do indat endpoints first */
589         for (j = 0; j <= N_IN_URB; ++j) {
590                 portdata->in_urbs[j] = option_setup_urb (serial,
591                   port->bulk_in_endpointAddress, USB_DIR_IN, port,
592                   portdata->in_buffer[j], IN_BUFLEN, option_indat_callback);
593         }
594
595         /* outdat endpoints */
596         for (j = 0; j <= N_OUT_URB; ++j) {
597                 portdata->out_urbs[j] = option_setup_urb (serial,
598                   port->bulk_out_endpointAddress, USB_DIR_OUT, port,
599                   portdata->out_buffer[j], OUT_BUFLEN, option_outdat_callback);
600         }
601 }
602
603 static int option_send_setup(struct usb_serial_port *port)
604 {
605         struct usb_serial *serial = port->serial;
606         struct option_port_private *portdata;
607
608         dbg("%s", __FUNCTION__);
609
610         portdata = usb_get_serial_port_data(port);
611
612         if (port->tty) {
613                 int val = 0;
614                 if (portdata->dtr_state)
615                         val |= 0x01;
616                 if (portdata->rts_state)
617                         val |= 0x02;
618
619                 return usb_control_msg(serial->dev,
620                                 usb_rcvctrlpipe(serial->dev, 0),
621                                 0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT);
622         }
623
624         return 0;
625 }
626
627 static int option_startup(struct usb_serial *serial)
628 {
629         int i, err;
630         struct usb_serial_port *port;
631         struct option_port_private *portdata;
632
633         dbg("%s", __FUNCTION__);
634
635         /* Now setup per port private data */
636         for (i = 0; i < serial->num_ports; i++) {
637                 port = serial->port[i];
638                 portdata = kmalloc(sizeof(*portdata), GFP_KERNEL);
639                 if (!portdata) {
640                         dbg("%s: kmalloc for option_port_private (%d) failed!.",
641                                         __FUNCTION__, i);
642                         return (1);
643                 }
644                 memset(portdata, 0, sizeof(struct option_port_private));
645
646                 usb_set_serial_port_data(port, portdata);
647
648                 if (! port->interrupt_in_urb)
649                         continue;
650                 err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
651                 if (err)
652                         dbg("%s: submit irq_in urb failed %d",
653                                 __FUNCTION__, err);
654         }
655
656         option_setup_urbs(serial);
657
658         return (0);
659 }
660
661 static void option_shutdown(struct usb_serial *serial)
662 {
663         int i, j;
664         struct usb_serial_port *port;
665         struct option_port_private *portdata;
666
667         dbg("%s", __FUNCTION__);
668
669         /* Stop reading/writing urbs */
670         for (i = 0; i < serial->num_ports; ++i) {
671                 port = serial->port[i];
672                 portdata = usb_get_serial_port_data(port);
673                 for (j = 0; j < N_IN_URB; j++)
674                         stop_urb(portdata->in_urbs[j]);
675                 for (j = 0; j < N_OUT_URB; j++)
676                         stop_urb(portdata->out_urbs[j]);
677         }
678
679         /* Now free them */
680         for (i = 0; i < serial->num_ports; ++i) {
681                 port = serial->port[i];
682                 portdata = usb_get_serial_port_data(port);
683
684                 for (j = 0; j < N_IN_URB; j++) {
685                         if (portdata->in_urbs[j]) {
686                                 usb_free_urb(portdata->in_urbs[j]);
687                                 portdata->in_urbs[j] = NULL;
688                         }
689                 }
690                 for (j = 0; j < N_OUT_URB; j++) {
691                         if (portdata->out_urbs[j]) {
692                                 usb_free_urb(portdata->out_urbs[j]);
693                                 portdata->out_urbs[j] = NULL;
694                         }
695                 }
696         }
697
698         /* Now free per port private data */
699         for (i = 0; i < serial->num_ports; i++) {
700                 port = serial->port[i];
701                 kfree(usb_get_serial_port_data(port));
702         }
703 }
704
705 MODULE_AUTHOR(DRIVER_AUTHOR);
706 MODULE_DESCRIPTION(DRIVER_DESC);
707 MODULE_VERSION(DRIVER_VERSION);
708 MODULE_LICENSE("GPL");
709
710 #ifdef CONFIG_USB_DEBUG
711 module_param(debug, bool, S_IRUGO | S_IWUSR);
712 MODULE_PARM_DESC(debug, "Debug messages");
713 #endif
714