blob: 38b4dae319eedc3e8c0a30e1cc2243404ccd1b79 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Belkin USB Serial Adapter Driver
3 *
4 * Copyright (C) 2000 William Greathouse (wgreathouse@smva.com)
5 * Copyright (C) 2000-2001 Greg Kroah-Hartman (greg@kroah.com)
6 *
7 * This program is largely derived from work by the linux-usb group
8 * and associated source files. Please see the usb/serial files for
9 * individual credits and copyrights.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * See Documentation/usb/usb-serial.txt for more information on using this driver
17 *
18 * TODO:
19 * -- Add true modem contol line query capability. Currently we track the
20 * states reported by the interrupt and the states we request.
21 * -- Add error reporting back to application for UART error conditions.
22 * Just point me at how to implement this and I'll do it. I've put the
23 * framework in, but haven't analyzed the "tty_flip" interface yet.
24 * -- Add support for flush commands
25 * -- Add everything that is missing :)
26 *
27 * 27-Nov-2001 gkh
28 * compressed all the differnent device entries into 1.
29 *
30 * 30-May-2001 gkh
31 * switched from using spinlock to a semaphore, which fixes lots of problems.
32 *
33 * 08-Apr-2001 gb
34 * - Identify version on module load.
35 *
36 * 12-Mar-2001 gkh
37 * - Added support for the GoHubs GO-COM232 device which is the same as the
38 * Peracom device.
39 *
40 * 06-Nov-2000 gkh
41 * - Added support for the old Belkin and Peracom devices.
42 * - Made the port able to be opened multiple times.
43 * - Added some defaults incase the line settings are things these devices
44 * can't support.
45 *
46 * 18-Oct-2000 William Greathouse
47 * Released into the wild (linux-usb-devel)
48 *
49 * 17-Oct-2000 William Greathouse
50 * Add code to recognize firmware version and set hardware flow control
51 * appropriately. Belkin states that firmware prior to 3.05 does not
52 * operate correctly in hardware handshake mode. I have verified this
53 * on firmware 2.05 -- for both RTS and DTR input flow control, the control
54 * line is not reset. The test performed by the Belkin Win* driver is
55 * to enable hardware flow control for firmware 2.06 or greater and
56 * for 1.00 or prior. I am only enabling for 2.06 or greater.
57 *
58 * 12-Oct-2000 William Greathouse
59 * First cut at supporting Belkin USB Serial Adapter F5U103
60 * I did not have a copy of the original work to support this
61 * adapter, so pardon any stupid mistakes. All of the information
62 * I am using to write this driver was acquired by using a modified
63 * UsbSnoop on Windows2000 and from examining the other USB drivers.
64 */
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066#include <linux/kernel.h>
67#include <linux/errno.h>
68#include <linux/init.h>
69#include <linux/slab.h>
70#include <linux/tty.h>
71#include <linux/tty_driver.h>
72#include <linux/tty_flip.h>
73#include <linux/module.h>
74#include <linux/spinlock.h>
75#include <asm/uaccess.h>
76#include <linux/usb.h>
Greg Kroah-Hartmana9698882006-07-11 21:22:58 -070077#include <linux/usb/serial.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070078#include "belkin_sa.h"
79
80static int debug;
81
82/*
83 * Version Information
84 */
85#define DRIVER_VERSION "v1.2"
86#define DRIVER_AUTHOR "William Greathouse <wgreathouse@smva.com>"
87#define DRIVER_DESC "USB Belkin Serial converter driver"
88
89/* function prototypes for a Belkin USB Serial Adapter F5U103 */
90static int belkin_sa_startup (struct usb_serial *serial);
91static void belkin_sa_shutdown (struct usb_serial *serial);
92static int belkin_sa_open (struct usb_serial_port *port, struct file *filp);
93static void belkin_sa_close (struct usb_serial_port *port, struct file *filp);
David Howells7d12e782006-10-05 14:55:46 +010094static void belkin_sa_read_int_callback (struct urb *urb);
Alan Cox606d0992006-12-08 02:38:45 -080095static void belkin_sa_set_termios (struct usb_serial_port *port, struct ktermios * old);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096static int belkin_sa_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
97static void belkin_sa_break_ctl (struct usb_serial_port *port, int break_state );
98static int belkin_sa_tiocmget (struct usb_serial_port *port, struct file *file);
99static int belkin_sa_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
100
101
102static struct usb_device_id id_table_combined [] = {
103 { USB_DEVICE(BELKIN_SA_VID, BELKIN_SA_PID) },
104 { USB_DEVICE(BELKIN_OLD_VID, BELKIN_OLD_PID) },
105 { USB_DEVICE(PERACOM_VID, PERACOM_PID) },
106 { USB_DEVICE(GOHUBS_VID, GOHUBS_PID) },
107 { USB_DEVICE(GOHUBS_VID, HANDYLINK_PID) },
108 { USB_DEVICE(BELKIN_DOCKSTATION_VID, BELKIN_DOCKSTATION_PID) },
109 { } /* Terminating entry */
110};
111
112MODULE_DEVICE_TABLE (usb, id_table_combined);
113
114static struct usb_driver belkin_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 .name = "belkin",
116 .probe = usb_serial_probe,
117 .disconnect = usb_serial_disconnect,
118 .id_table = id_table_combined,
Greg Kroah-Hartmanba9dc652005-11-16 13:41:28 -0800119 .no_dynamic_id = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120};
121
122/* All of the device info needed for the serial converters */
Greg Kroah-Hartmanea653702005-06-20 21:15:16 -0700123static struct usb_serial_driver belkin_device = {
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700124 .driver = {
125 .owner = THIS_MODULE,
Greg Kroah-Hartman269bda12005-06-20 21:15:16 -0700126 .name = "belkin",
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700127 },
Greg Kroah-Hartman269bda12005-06-20 21:15:16 -0700128 .description = "Belkin / Peracom / GoHubs USB Serial Adapter",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 .id_table = id_table_combined,
130 .num_interrupt_in = 1,
131 .num_bulk_in = 1,
132 .num_bulk_out = 1,
133 .num_ports = 1,
134 .open = belkin_sa_open,
135 .close = belkin_sa_close,
136 .read_int_callback = belkin_sa_read_int_callback, /* How we get the status info */
137 .ioctl = belkin_sa_ioctl,
138 .set_termios = belkin_sa_set_termios,
139 .break_ctl = belkin_sa_break_ctl,
140 .tiocmget = belkin_sa_tiocmget,
141 .tiocmset = belkin_sa_tiocmset,
142 .attach = belkin_sa_startup,
143 .shutdown = belkin_sa_shutdown,
144};
145
146
147struct belkin_sa_private {
148 spinlock_t lock;
149 unsigned long control_state;
150 unsigned char last_lsr;
151 unsigned char last_msr;
152 int bad_flow_control;
153};
154
155
156/*
157 * ***************************************************************************
158 * Belkin USB Serial Adapter F5U103 specific driver functions
159 * ***************************************************************************
160 */
161
162#define WDR_TIMEOUT 5000 /* default urb timeout */
163
164/* assumes that struct usb_serial *serial is available */
165#define BSA_USB_CMD(c,v) usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), \
166 (c), BELKIN_SA_SET_REQUEST_TYPE, \
167 (v), 0, NULL, 0, WDR_TIMEOUT)
168
169/* do some startup allocations not currently performed by usb_serial_probe() */
170static int belkin_sa_startup (struct usb_serial *serial)
171{
172 struct usb_device *dev = serial->dev;
173 struct belkin_sa_private *priv;
174
175 /* allocate the private data structure */
176 priv = kmalloc(sizeof(struct belkin_sa_private), GFP_KERNEL);
177 if (!priv)
178 return (-1); /* error */
179 /* set initial values for control structures */
180 spin_lock_init(&priv->lock);
181 priv->control_state = 0;
182 priv->last_lsr = 0;
183 priv->last_msr = 0;
184 /* see comments at top of file */
185 priv->bad_flow_control = (le16_to_cpu(dev->descriptor.bcdDevice) <= 0x0206) ? 1 : 0;
186 info("bcdDevice: %04x, bfc: %d", le16_to_cpu(dev->descriptor.bcdDevice), priv->bad_flow_control);
187
188 init_waitqueue_head(&serial->port[0]->write_wait);
189 usb_set_serial_port_data(serial->port[0], priv);
190
191 return (0);
192}
193
194
195static void belkin_sa_shutdown (struct usb_serial *serial)
196{
197 struct belkin_sa_private *priv;
198 int i;
199
200 dbg ("%s", __FUNCTION__);
201
202 /* stop reads and writes on all ports */
203 for (i=0; i < serial->num_ports; ++i) {
204 /* My special items, the standard routines free my urbs */
205 priv = usb_get_serial_port_data(serial->port[i]);
Jesper Juhl1bc3c9e2005-04-18 17:39:34 -0700206 kfree(priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 }
208}
209
210
211static int belkin_sa_open (struct usb_serial_port *port, struct file *filp)
212{
213 int retval = 0;
214
215 dbg("%s port %d", __FUNCTION__, port->number);
216
217 /*Start reading from the device*/
218 /* TODO: Look at possibility of submitting multiple URBs to device to
219 * enhance buffering. Win trace shows 16 initial read URBs.
220 */
221 port->read_urb->dev = port->serial->dev;
222 retval = usb_submit_urb(port->read_urb, GFP_KERNEL);
223 if (retval) {
224 err("usb_submit_urb(read bulk) failed");
225 goto exit;
226 }
227
228 port->interrupt_in_urb->dev = port->serial->dev;
229 retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
230 if (retval) {
231 usb_kill_urb(port->read_urb);
232 err(" usb_submit_urb(read int) failed");
233 }
234
235exit:
236 return retval;
237} /* belkin_sa_open */
238
239
240static void belkin_sa_close (struct usb_serial_port *port, struct file *filp)
241{
242 dbg("%s port %d", __FUNCTION__, port->number);
243
244 /* shutdown our bulk reads and writes */
245 usb_kill_urb(port->write_urb);
246 usb_kill_urb(port->read_urb);
247 usb_kill_urb(port->interrupt_in_urb);
248} /* belkin_sa_close */
249
250
David Howells7d12e782006-10-05 14:55:46 +0100251static void belkin_sa_read_int_callback (struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252{
253 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
254 struct belkin_sa_private *priv;
255 unsigned char *data = urb->transfer_buffer;
256 int retval;
257 unsigned long flags;
258
259 switch (urb->status) {
260 case 0:
261 /* success */
262 break;
263 case -ECONNRESET:
264 case -ENOENT:
265 case -ESHUTDOWN:
266 /* this urb is terminated, clean up */
267 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
268 return;
269 default:
270 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
271 goto exit;
272 }
273
274 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
275
276 /* Handle known interrupt data */
277 /* ignore data[0] and data[1] */
278
279 priv = usb_get_serial_port_data(port);
280 spin_lock_irqsave(&priv->lock, flags);
281 priv->last_msr = data[BELKIN_SA_MSR_INDEX];
282
283 /* Record Control Line states */
284 if (priv->last_msr & BELKIN_SA_MSR_DSR)
285 priv->control_state |= TIOCM_DSR;
286 else
287 priv->control_state &= ~TIOCM_DSR;
288
289 if (priv->last_msr & BELKIN_SA_MSR_CTS)
290 priv->control_state |= TIOCM_CTS;
291 else
292 priv->control_state &= ~TIOCM_CTS;
293
294 if (priv->last_msr & BELKIN_SA_MSR_RI)
295 priv->control_state |= TIOCM_RI;
296 else
297 priv->control_state &= ~TIOCM_RI;
298
299 if (priv->last_msr & BELKIN_SA_MSR_CD)
300 priv->control_state |= TIOCM_CD;
301 else
302 priv->control_state &= ~TIOCM_CD;
303
304 /* Now to report any errors */
305 priv->last_lsr = data[BELKIN_SA_LSR_INDEX];
306#if 0
307 /*
308 * fill in the flip buffer here, but I do not know the relation
309 * to the current/next receive buffer or characters. I need
310 * to look in to this before committing any code.
311 */
312 if (priv->last_lsr & BELKIN_SA_LSR_ERR) {
313 tty = port->tty;
314 /* Overrun Error */
315 if (priv->last_lsr & BELKIN_SA_LSR_OE) {
316 }
317 /* Parity Error */
318 if (priv->last_lsr & BELKIN_SA_LSR_PE) {
319 }
320 /* Framing Error */
321 if (priv->last_lsr & BELKIN_SA_LSR_FE) {
322 }
323 /* Break Indicator */
324 if (priv->last_lsr & BELKIN_SA_LSR_BI) {
325 }
326 }
327#endif
328 spin_unlock_irqrestore(&priv->lock, flags);
329exit:
330 retval = usb_submit_urb (urb, GFP_ATOMIC);
331 if (retval)
332 err ("%s - usb_submit_urb failed with result %d",
333 __FUNCTION__, retval);
334}
335
Alan Cox606d0992006-12-08 02:38:45 -0800336static void belkin_sa_set_termios (struct usb_serial_port *port, struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337{
338 struct usb_serial *serial = port->serial;
339 struct belkin_sa_private *priv = usb_get_serial_port_data(port);
340 unsigned int iflag;
341 unsigned int cflag;
342 unsigned int old_iflag = 0;
343 unsigned int old_cflag = 0;
344 __u16 urb_value = 0; /* Will hold the new flags */
345 unsigned long flags;
346 unsigned long control_state;
347 int bad_flow_control;
348
349 if ((!port->tty) || (!port->tty->termios)) {
350 dbg ("%s - no tty or termios structure", __FUNCTION__);
351 return;
352 }
353
354 iflag = port->tty->termios->c_iflag;
355 cflag = port->tty->termios->c_cflag;
356
357 /* get a local copy of the current port settings */
358 spin_lock_irqsave(&priv->lock, flags);
359 control_state = priv->control_state;
360 bad_flow_control = priv->bad_flow_control;
361 spin_unlock_irqrestore(&priv->lock, flags);
362
363 /* check that they really want us to change something */
364 if (old_termios) {
365 if ((cflag == old_termios->c_cflag) &&
366 (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {
367 dbg("%s - nothing to change...", __FUNCTION__);
368 return;
369 }
370 old_iflag = old_termios->c_iflag;
371 old_cflag = old_termios->c_cflag;
372 }
373
374 /* Set the baud rate */
375 if( (cflag&CBAUD) != (old_cflag&CBAUD) ) {
376 /* reassert DTR and (maybe) RTS on transition from B0 */
377 if( (old_cflag&CBAUD) == B0 ) {
378 control_state |= (TIOCM_DTR|TIOCM_RTS);
379 if (BSA_USB_CMD(BELKIN_SA_SET_DTR_REQUEST, 1) < 0)
380 err("Set DTR error");
381 /* don't set RTS if using hardware flow control */
382 if (!(old_cflag&CRTSCTS) )
383 if (BSA_USB_CMD(BELKIN_SA_SET_RTS_REQUEST, 1) < 0)
384 err("Set RTS error");
385 }
386
387 switch(cflag & CBAUD) {
388 case B0: /* handled below */ break;
389 case B300: urb_value = BELKIN_SA_BAUD(300); break;
390 case B600: urb_value = BELKIN_SA_BAUD(600); break;
391 case B1200: urb_value = BELKIN_SA_BAUD(1200); break;
392 case B2400: urb_value = BELKIN_SA_BAUD(2400); break;
393 case B4800: urb_value = BELKIN_SA_BAUD(4800); break;
394 case B9600: urb_value = BELKIN_SA_BAUD(9600); break;
395 case B19200: urb_value = BELKIN_SA_BAUD(19200); break;
396 case B38400: urb_value = BELKIN_SA_BAUD(38400); break;
397 case B57600: urb_value = BELKIN_SA_BAUD(57600); break;
398 case B115200: urb_value = BELKIN_SA_BAUD(115200); break;
399 case B230400: urb_value = BELKIN_SA_BAUD(230400); break;
400 default: err("BELKIN USB Serial Adapter: unsupported baudrate request, using default of 9600");
401 urb_value = BELKIN_SA_BAUD(9600); break;
402 }
403 if ((cflag & CBAUD) != B0 ) {
404 if (BSA_USB_CMD(BELKIN_SA_SET_BAUDRATE_REQUEST, urb_value) < 0)
405 err("Set baudrate error");
406 } else {
407 /* Disable flow control */
408 if (BSA_USB_CMD(BELKIN_SA_SET_FLOW_CTRL_REQUEST, BELKIN_SA_FLOW_NONE) < 0)
409 err("Disable flowcontrol error");
410
411 /* Drop RTS and DTR */
412 control_state &= ~(TIOCM_DTR | TIOCM_RTS);
413 if (BSA_USB_CMD(BELKIN_SA_SET_DTR_REQUEST, 0) < 0)
414 err("DTR LOW error");
415 if (BSA_USB_CMD(BELKIN_SA_SET_RTS_REQUEST, 0) < 0)
416 err("RTS LOW error");
417 }
418 }
419
420 /* set the parity */
421 if( (cflag&(PARENB|PARODD)) != (old_cflag&(PARENB|PARODD)) ) {
422 if (cflag & PARENB)
423 urb_value = (cflag & PARODD) ? BELKIN_SA_PARITY_ODD : BELKIN_SA_PARITY_EVEN;
424 else
425 urb_value = BELKIN_SA_PARITY_NONE;
426 if (BSA_USB_CMD(BELKIN_SA_SET_PARITY_REQUEST, urb_value) < 0)
427 err("Set parity error");
428 }
429
430 /* set the number of data bits */
431 if( (cflag&CSIZE) != (old_cflag&CSIZE) ) {
432 switch (cflag & CSIZE) {
433 case CS5: urb_value = BELKIN_SA_DATA_BITS(5); break;
434 case CS6: urb_value = BELKIN_SA_DATA_BITS(6); break;
435 case CS7: urb_value = BELKIN_SA_DATA_BITS(7); break;
436 case CS8: urb_value = BELKIN_SA_DATA_BITS(8); break;
437 default: err("CSIZE was not CS5-CS8, using default of 8");
438 urb_value = BELKIN_SA_DATA_BITS(8);
439 break;
440 }
441 if (BSA_USB_CMD(BELKIN_SA_SET_DATA_BITS_REQUEST, urb_value) < 0)
442 err("Set data bits error");
443 }
444
445 /* set the number of stop bits */
446 if( (cflag&CSTOPB) != (old_cflag&CSTOPB) ) {
447 urb_value = (cflag & CSTOPB) ? BELKIN_SA_STOP_BITS(2) : BELKIN_SA_STOP_BITS(1);
448 if (BSA_USB_CMD(BELKIN_SA_SET_STOP_BITS_REQUEST, urb_value) < 0)
449 err("Set stop bits error");
450 }
451
452 /* Set flow control */
453 if( (iflag&IXOFF) != (old_iflag&IXOFF)
454 || (iflag&IXON) != (old_iflag&IXON)
455 || (cflag&CRTSCTS) != (old_cflag&CRTSCTS) ) {
456 urb_value = 0;
457 if ((iflag & IXOFF) || (iflag & IXON))
458 urb_value |= (BELKIN_SA_FLOW_OXON | BELKIN_SA_FLOW_IXON);
459 else
460 urb_value &= ~(BELKIN_SA_FLOW_OXON | BELKIN_SA_FLOW_IXON);
461
462 if (cflag & CRTSCTS)
463 urb_value |= (BELKIN_SA_FLOW_OCTS | BELKIN_SA_FLOW_IRTS);
464 else
465 urb_value &= ~(BELKIN_SA_FLOW_OCTS | BELKIN_SA_FLOW_IRTS);
466
467 if (bad_flow_control)
468 urb_value &= ~(BELKIN_SA_FLOW_IRTS);
469
470 if (BSA_USB_CMD(BELKIN_SA_SET_FLOW_CTRL_REQUEST, urb_value) < 0)
471 err("Set flow control error");
472 }
473
474 /* save off the modified port settings */
475 spin_lock_irqsave(&priv->lock, flags);
476 priv->control_state = control_state;
477 spin_unlock_irqrestore(&priv->lock, flags);
478} /* belkin_sa_set_termios */
479
480
481static void belkin_sa_break_ctl( struct usb_serial_port *port, int break_state )
482{
483 struct usb_serial *serial = port->serial;
484
485 if (BSA_USB_CMD(BELKIN_SA_SET_BREAK_REQUEST, break_state ? 1 : 0) < 0)
486 err("Set break_ctl %d", break_state);
487}
488
489
490static int belkin_sa_tiocmget (struct usb_serial_port *port, struct file *file)
491{
492 struct belkin_sa_private *priv = usb_get_serial_port_data(port);
493 unsigned long control_state;
494 unsigned long flags;
495
496 dbg("%s", __FUNCTION__);
497
498 spin_lock_irqsave(&priv->lock, flags);
499 control_state = priv->control_state;
500 spin_unlock_irqrestore(&priv->lock, flags);
501
502 return control_state;
503}
504
505
506static int belkin_sa_tiocmset (struct usb_serial_port *port, struct file *file,
507 unsigned int set, unsigned int clear)
508{
509 struct usb_serial *serial = port->serial;
510 struct belkin_sa_private *priv = usb_get_serial_port_data(port);
511 unsigned long control_state;
512 unsigned long flags;
513 int retval;
514 int rts = 0;
515 int dtr = 0;
516
517 dbg("%s", __FUNCTION__);
518
519 spin_lock_irqsave(&priv->lock, flags);
520 control_state = priv->control_state;
521
522 if (set & TIOCM_RTS) {
523 control_state |= TIOCM_RTS;
524 rts = 1;
525 }
526 if (set & TIOCM_DTR) {
527 control_state |= TIOCM_DTR;
528 dtr = 1;
529 }
530 if (clear & TIOCM_RTS) {
531 control_state &= ~TIOCM_RTS;
532 rts = 0;
533 }
534 if (clear & TIOCM_DTR) {
535 control_state &= ~TIOCM_DTR;
536 dtr = 0;
537 }
538
539 priv->control_state = control_state;
540 spin_unlock_irqrestore(&priv->lock, flags);
541
542 retval = BSA_USB_CMD(BELKIN_SA_SET_RTS_REQUEST, rts);
543 if (retval < 0) {
544 err("Set RTS error %d", retval);
545 goto exit;
546 }
547
548 retval = BSA_USB_CMD(BELKIN_SA_SET_DTR_REQUEST, dtr);
549 if (retval < 0) {
550 err("Set DTR error %d", retval);
551 goto exit;
552 }
553exit:
554 return retval;
555}
556
557
558static int belkin_sa_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
559{
560 switch (cmd) {
561 case TIOCMIWAIT:
562 /* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/
563 /* TODO */
564 return( 0 );
565
566 case TIOCGICOUNT:
567 /* return count of modemline transitions */
568 /* TODO */
569 return 0;
570
571 default:
572 dbg("belkin_sa_ioctl arg not supported - 0x%04x",cmd);
573 return(-ENOIOCTLCMD);
574 break;
575 }
576 return 0;
577} /* belkin_sa_ioctl */
578
579
580static int __init belkin_sa_init (void)
581{
582 int retval;
583 retval = usb_serial_register(&belkin_device);
584 if (retval)
585 goto failed_usb_serial_register;
586 retval = usb_register(&belkin_driver);
587 if (retval)
588 goto failed_usb_register;
589 info(DRIVER_DESC " " DRIVER_VERSION);
590 return 0;
591failed_usb_register:
592 usb_serial_deregister(&belkin_device);
593failed_usb_serial_register:
594 return retval;
595}
596
597
598static void __exit belkin_sa_exit (void)
599{
600 usb_deregister (&belkin_driver);
601 usb_serial_deregister (&belkin_device);
602}
603
604
605module_init (belkin_sa_init);
606module_exit (belkin_sa_exit);
607
608MODULE_AUTHOR( DRIVER_AUTHOR );
609MODULE_DESCRIPTION( DRIVER_DESC );
610MODULE_VERSION( DRIVER_VERSION );
611MODULE_LICENSE("GPL");
612
613module_param(debug, bool, S_IRUGO | S_IWUSR);
614MODULE_PARM_DESC(debug, "Debug enabled or not");