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[pohmelfs.git] / drivers / usb / serial / kl5kusb105.c
blobfc064e1442ca988ae3330388cb4d855f023f1595
1 /*
2 * KLSI KL5KUSB105 chip RS232 converter driver
3 *
4 * Copyright (C) 2010 Johan Hovold <jhovold@gmail.com>
5 * Copyright (C) 2001 Utz-Uwe Haus <haus@uuhaus.de>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * All information about the device was acquired using SniffUSB ans snoopUSB
13 * on Windows98.
14 * It was written out of frustration with the PalmConnect USB Serial adapter
15 * sold by Palm Inc.
16 * Neither Palm, nor their contractor (MCCI) or their supplier (KLSI) provided
17 * information that was not already available.
18 *
19 * It seems that KLSI bought some silicon-design information from ScanLogic,
20 * whose SL11R processor is at the core of the KL5KUSB chipset from KLSI.
21 * KLSI has firmware available for their devices; it is probable that the
22 * firmware differs from that used by KLSI in their products. If you have an
23 * original KLSI device and can provide some information on it, I would be
24 * most interested in adding support for it here. If you have any information
25 * on the protocol used (or find errors in my reverse-engineered stuff), please
26 * let me know.
27 *
28 * The code was only tested with a PalmConnect USB adapter; if you
29 * are adventurous, try it with any KLSI-based device and let me know how it
30 * breaks so that I can fix it!
31 */
32
33 /* TODO:
34 * check modem line signals
35 * implement handshaking or decide that we do not support it
36 */
37
38 #include <linux/kernel.h>
39 #include <linux/errno.h>
40 #include <linux/init.h>
41 #include <linux/slab.h>
42 #include <linux/tty.h>
43 #include <linux/tty_driver.h>
44 #include <linux/tty_flip.h>
45 #include <linux/module.h>
46 #include <linux/uaccess.h>
47 #include <asm/unaligned.h>
48 #include <linux/usb.h>
49 #include <linux/usb/serial.h>
50 #include "kl5kusb105.h"
51
52 static bool debug;
53
54 /*
55 * Version Information
56 */
57 #define DRIVER_VERSION "v0.4"
58 #define DRIVER_AUTHOR "Utz-Uwe Haus <haus@uuhaus.de>, Johan Hovold <jhovold@gmail.com>"
59 #define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver"
60
61
62 /*
63 * Function prototypes
64 */
65 static int klsi_105_startup(struct usb_serial *serial);
66 static void klsi_105_release(struct usb_serial *serial);
67 static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port);
68 static void klsi_105_close(struct usb_serial_port *port);
69 static void klsi_105_set_termios(struct tty_struct *tty,
70 struct usb_serial_port *port, struct ktermios *old);
71 static int klsi_105_tiocmget(struct tty_struct *tty);
72 static int klsi_105_tiocmset(struct tty_struct *tty,
73 unsigned int set, unsigned int clear);
74 static void klsi_105_process_read_urb(struct urb *urb);
75 static int klsi_105_prepare_write_buffer(struct usb_serial_port *port,
76 void *dest, size_t size);
77
78 /*
79 * All of the device info needed for the KLSI converters.
80 */
81 static const struct usb_device_id id_table[] = {
82 { USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) },
83 { USB_DEVICE(KLSI_VID, KLSI_KL5KUSB105D_PID) },
84 { } /* Terminating entry */
85 };
86
87 MODULE_DEVICE_TABLE(usb, id_table);
88
89 static struct usb_driver kl5kusb105d_driver = {
90 .name = "kl5kusb105d",
91 .probe = usb_serial_probe,
92 .disconnect = usb_serial_disconnect,
93 .id_table = id_table,
94 .no_dynamic_id = 1,
95 };
96
97 static struct usb_serial_driver kl5kusb105d_device = {
98 .driver = {
99 .owner = THIS_MODULE,
100 .name = "kl5kusb105d",
101 },
102 .description = "KL5KUSB105D / PalmConnect",
103 .usb_driver = &kl5kusb105d_driver,
104 .id_table = id_table,
105 .num_ports = 1,
106 .bulk_out_size = 64,
107 .open = klsi_105_open,
108 .close = klsi_105_close,
109 .set_termios = klsi_105_set_termios,
110 /*.break_ctl = klsi_105_break_ctl,*/
111 .tiocmget = klsi_105_tiocmget,
112 .tiocmset = klsi_105_tiocmset,
113 .attach = klsi_105_startup,
114 .release = klsi_105_release,
115 .throttle = usb_serial_generic_throttle,
116 .unthrottle = usb_serial_generic_unthrottle,
117 .process_read_urb = klsi_105_process_read_urb,
118 .prepare_write_buffer = klsi_105_prepare_write_buffer,
119 };
120
121 struct klsi_105_port_settings {
122 __u8 pktlen; /* always 5, it seems */
123 __u8 baudrate;
124 __u8 databits;
125 __u8 unknown1;
126 __u8 unknown2;
127 } __attribute__ ((packed));
128
129 struct klsi_105_private {
130 struct klsi_105_port_settings cfg;
131 struct ktermios termios;
132 unsigned long line_state; /* modem line settings */
133 spinlock_t lock;
134 };
135
136
137 /*
138 * Handle vendor specific USB requests
139 */
140
141
142 #define KLSI_TIMEOUT 5000 /* default urb timeout */
143
144 static int klsi_105_chg_port_settings(struct usb_serial_port *port,
145 struct klsi_105_port_settings *settings)
146 {
147 int rc;
148
149 rc = usb_control_msg(port->serial->dev,
150 usb_sndctrlpipe(port->serial->dev, 0),
151 KL5KUSB105A_SIO_SET_DATA,
152 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE,
153 0, /* value */
154 0, /* index */
155 settings,
156 sizeof(struct klsi_105_port_settings),
157 KLSI_TIMEOUT);
158 if (rc < 0)
159 dev_err(&port->dev,
160 "Change port settings failed (error = %d)\n", rc);
161 dev_info(&port->serial->dev->dev,
162 "%d byte block, baudrate %x, databits %d, u1 %d, u2 %d\n",
163 settings->pktlen, settings->baudrate, settings->databits,
164 settings->unknown1, settings->unknown2);
165 return rc;
166 }
167
168 /* translate a 16-bit status value from the device to linux's TIO bits */
169 static unsigned long klsi_105_status2linestate(const __u16 status)
170 {
171 unsigned long res = 0;
172
173 res = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0)
174 | ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0)
175 ;
176
177 return res;
178 }
179
180 /*
181 * Read line control via vendor command and return result through
182 * *line_state_p
183 */
184 /* It seems that the status buffer has always only 2 bytes length */
185 #define KLSI_STATUSBUF_LEN 2
186 static int klsi_105_get_line_state(struct usb_serial_port *port,
187 unsigned long *line_state_p)
188 {
189 int rc;
190 u8 *status_buf;
191 __u16 status;
192
193 dev_info(&port->serial->dev->dev, "sending SIO Poll request\n");
194
195 status_buf = kmalloc(KLSI_STATUSBUF_LEN, GFP_KERNEL);
196 if (!status_buf) {
197 dev_err(&port->dev, "%s - out of memory for status buffer.\n",
198 __func__);
199 return -ENOMEM;
200 }
201 status_buf[0] = 0xff;
202 status_buf[1] = 0xff;
203 rc = usb_control_msg(port->serial->dev,
204 usb_rcvctrlpipe(port->serial->dev, 0),
205 KL5KUSB105A_SIO_POLL,
206 USB_TYPE_VENDOR | USB_DIR_IN,
207 0, /* value */
208 0, /* index */
209 status_buf, KLSI_STATUSBUF_LEN,
210 10000
211 );
212 if (rc < 0)
213 dev_err(&port->dev, "Reading line status failed (error = %d)\n",
214 rc);
215 else {
216 status = get_unaligned_le16(status_buf);
217
218 dev_info(&port->serial->dev->dev, "read status %x %x",
219 status_buf[0], status_buf[1]);
220
221 *line_state_p = klsi_105_status2linestate(status);
222 }
223
224 kfree(status_buf);
225 return rc;
226 }
227
228
229 /*
230 * Driver's tty interface functions
231 */
232
233 static int klsi_105_startup(struct usb_serial *serial)
234 {
235 struct klsi_105_private *priv;
236 int i;
237
238 /* check if we support the product id (see keyspan.c)
239 * FIXME
240 */
241
242 /* allocate the private data structure */
243 for (i = 0; i < serial->num_ports; i++) {
244 priv = kmalloc(sizeof(struct klsi_105_private),
245 GFP_KERNEL);
246 if (!priv) {
247 dbg("%skmalloc for klsi_105_private failed.", __func__);
248 i--;
249 goto err_cleanup;
250 }
251 /* set initial values for control structures */
252 priv->cfg.pktlen = 5;
253 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
254 priv->cfg.databits = kl5kusb105a_dtb_8;
255 priv->cfg.unknown1 = 0;
256 priv->cfg.unknown2 = 1;
257
258 priv->line_state = 0;
259
260 usb_set_serial_port_data(serial->port[i], priv);
261
262 spin_lock_init(&priv->lock);
263
264 /* priv->termios is left uninitialized until port opening */
265 init_waitqueue_head(&serial->port[i]->write_wait);
266 }
267
268 return 0;
269
270 err_cleanup:
271 for (; i >= 0; i--) {
272 priv = usb_get_serial_port_data(serial->port[i]);
273 kfree(priv);
274 usb_set_serial_port_data(serial->port[i], NULL);
275 }
276 return -ENOMEM;
277 }
278
279 static void klsi_105_release(struct usb_serial *serial)
280 {
281 int i;
282
283 dbg("%s", __func__);
284
285 for (i = 0; i < serial->num_ports; ++i)
286 kfree(usb_get_serial_port_data(serial->port[i]));
287 }
288
289 static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port)
290 {
291 struct klsi_105_private *priv = usb_get_serial_port_data(port);
292 int retval = 0;
293 int rc;
294 int i;
295 unsigned long line_state;
296 struct klsi_105_port_settings *cfg;
297 unsigned long flags;
298
299 dbg("%s port %d", __func__, port->number);
300
301 /* Do a defined restart:
302 * Set up sane default baud rate and send the 'READ_ON'
303 * vendor command.
304 * FIXME: set modem line control (how?)
305 * Then read the modem line control and store values in
306 * priv->line_state.
307 */
308 cfg = kmalloc(sizeof(*cfg), GFP_KERNEL);
309 if (!cfg) {
310 dev_err(&port->dev, "%s - out of memory for config buffer.\n",
311 __func__);
312 return -ENOMEM;
313 }
314 cfg->pktlen = 5;
315 cfg->baudrate = kl5kusb105a_sio_b9600;
316 cfg->databits = kl5kusb105a_dtb_8;
317 cfg->unknown1 = 0;
318 cfg->unknown2 = 1;
319 klsi_105_chg_port_settings(port, cfg);
320
321 /* set up termios structure */
322 spin_lock_irqsave(&priv->lock, flags);
323 priv->termios.c_iflag = tty->termios->c_iflag;
324 priv->termios.c_oflag = tty->termios->c_oflag;
325 priv->termios.c_cflag = tty->termios->c_cflag;
326 priv->termios.c_lflag = tty->termios->c_lflag;
327 for (i = 0; i < NCCS; i++)
328 priv->termios.c_cc[i] = tty->termios->c_cc[i];
329 priv->cfg.pktlen = cfg->pktlen;
330 priv->cfg.baudrate = cfg->baudrate;
331 priv->cfg.databits = cfg->databits;
332 priv->cfg.unknown1 = cfg->unknown1;
333 priv->cfg.unknown2 = cfg->unknown2;
334 spin_unlock_irqrestore(&priv->lock, flags);
335
336 /* READ_ON and urb submission */
337 rc = usb_serial_generic_open(tty, port);
338 if (rc) {
339 retval = rc;
340 goto exit;
341 }
342
343 rc = usb_control_msg(port->serial->dev,
344 usb_sndctrlpipe(port->serial->dev, 0),
345 KL5KUSB105A_SIO_CONFIGURE,
346 USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE,
347 KL5KUSB105A_SIO_CONFIGURE_READ_ON,
348 0, /* index */
349 NULL,
350 0,
351 KLSI_TIMEOUT);
352 if (rc < 0) {
353 dev_err(&port->dev, "Enabling read failed (error = %d)\n", rc);
354 retval = rc;
355 } else
356 dbg("%s - enabled reading", __func__);
357
358 rc = klsi_105_get_line_state(port, &line_state);
359 if (rc >= 0) {
360 spin_lock_irqsave(&priv->lock, flags);
361 priv->line_state = line_state;
362 spin_unlock_irqrestore(&priv->lock, flags);
363 dbg("%s - read line state 0x%lx", __func__, line_state);
364 retval = 0;
365 } else
366 retval = rc;
367
368 exit:
369 kfree(cfg);
370 return retval;
371 }
372
373 static void klsi_105_close(struct usb_serial_port *port)
374 {
375 int rc;
376
377 dbg("%s port %d", __func__, port->number);
378
379 mutex_lock(&port->serial->disc_mutex);
380 if (!port->serial->disconnected) {
381 /* send READ_OFF */
382 rc = usb_control_msg(port->serial->dev,
383 usb_sndctrlpipe(port->serial->dev, 0),
384 KL5KUSB105A_SIO_CONFIGURE,
385 USB_TYPE_VENDOR | USB_DIR_OUT,
386 KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
387 0, /* index */
388 NULL, 0,
389 KLSI_TIMEOUT);
390 if (rc < 0)
391 dev_err(&port->dev,
392 "Disabling read failed (error = %d)\n", rc);
393 }
394 mutex_unlock(&port->serial->disc_mutex);
395
396 /* shutdown our bulk reads and writes */
397 usb_serial_generic_close(port);
398
399 /* wgg - do I need this? I think so. */
400 usb_kill_urb(port->interrupt_in_urb);
401 }
402
403 /* We need to write a complete 64-byte data block and encode the
404 * number actually sent in the first double-byte, LSB-order. That
405 * leaves at most 62 bytes of payload.
406 */
407 #define KLSI_HDR_LEN 2
408 static int klsi_105_prepare_write_buffer(struct usb_serial_port *port,
409 void *dest, size_t size)
410 {
411 unsigned char *buf = dest;
412 int count;
413
414 count = kfifo_out_locked(&port->write_fifo, buf + KLSI_HDR_LEN, size,
415 &port->lock);
416 put_unaligned_le16(count, buf);
417
418 return count + KLSI_HDR_LEN;
419 }
420
421 /* The data received is preceded by a length double-byte in LSB-first order.
422 */
423 static void klsi_105_process_read_urb(struct urb *urb)
424 {
425 struct usb_serial_port *port = urb->context;
426 unsigned char *data = urb->transfer_buffer;
427 struct tty_struct *tty;
428 unsigned len;
429
430 /* empty urbs seem to happen, we ignore them */
431 if (!urb->actual_length)
432 return;
433
434 if (urb->actual_length <= KLSI_HDR_LEN) {
435 dbg("%s - malformed packet", __func__);
436 return;
437 }
438
439 tty = tty_port_tty_get(&port->port);
440 if (!tty)
441 return;
442
443 len = get_unaligned_le16(data);
444 if (len > urb->actual_length - KLSI_HDR_LEN) {
445 dbg("%s - packet length mismatch", __func__);
446 len = urb->actual_length - KLSI_HDR_LEN;
447 }
448
449 tty_insert_flip_string(tty, data + KLSI_HDR_LEN, len);
450 tty_flip_buffer_push(tty);
451 tty_kref_put(tty);
452 }
453
454 static void klsi_105_set_termios(struct tty_struct *tty,
455 struct usb_serial_port *port,
456 struct ktermios *old_termios)
457 {
458 struct klsi_105_private *priv = usb_get_serial_port_data(port);
459 unsigned int iflag = tty->termios->c_iflag;
460 unsigned int old_iflag = old_termios->c_iflag;
461 unsigned int cflag = tty->termios->c_cflag;
462 unsigned int old_cflag = old_termios->c_cflag;
463 struct klsi_105_port_settings *cfg;
464 unsigned long flags;
465 speed_t baud;
466
467 cfg = kmalloc(sizeof(*cfg), GFP_KERNEL);
468 if (!cfg) {
469 dev_err(&port->dev, "%s - out of memory for config buffer.\n",
470 __func__);
471 return;
472 }
473
474 /* lock while we are modifying the settings */
475 spin_lock_irqsave(&priv->lock, flags);
476
477 /*
478 * Update baud rate
479 */
480 baud = tty_get_baud_rate(tty);
481
482 if ((cflag & CBAUD) != (old_cflag & CBAUD)) {
483 /* reassert DTR and (maybe) RTS on transition from B0 */
484 if ((old_cflag & CBAUD) == B0) {
485 dbg("%s: baud was B0", __func__);
486 #if 0
487 priv->control_state |= TIOCM_DTR;
488 /* don't set RTS if using hardware flow control */
489 if (!(old_cflag & CRTSCTS))
490 priv->control_state |= TIOCM_RTS;
491 mct_u232_set_modem_ctrl(serial, priv->control_state);
492 #endif
493 }
494 }
495 switch (baud) {
496 case 0: /* handled below */
497 break;
498 case 1200:
499 priv->cfg.baudrate = kl5kusb105a_sio_b1200;
500 break;
501 case 2400:
502 priv->cfg.baudrate = kl5kusb105a_sio_b2400;
503 break;
504 case 4800:
505 priv->cfg.baudrate = kl5kusb105a_sio_b4800;
506 break;
507 case 9600:
508 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
509 break;
510 case 19200:
511 priv->cfg.baudrate = kl5kusb105a_sio_b19200;
512 break;
513 case 38400:
514 priv->cfg.baudrate = kl5kusb105a_sio_b38400;
515 break;
516 case 57600:
517 priv->cfg.baudrate = kl5kusb105a_sio_b57600;
518 break;
519 case 115200:
520 priv->cfg.baudrate = kl5kusb105a_sio_b115200;
521 break;
522 default:
523 dbg("KLSI USB->Serial converter:"
524 " unsupported baudrate request, using default of 9600");
525 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
526 baud = 9600;
527 break;
528 }
529 if ((cflag & CBAUD) == B0) {
530 dbg("%s: baud is B0", __func__);
531 /* Drop RTS and DTR */
532 /* maybe this should be simulated by sending read
533 * disable and read enable messages?
534 */
535 ;
536 #if 0
537 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
538 mct_u232_set_modem_ctrl(serial, priv->control_state);
539 #endif
540 }
541 tty_encode_baud_rate(tty, baud, baud);
542
543 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
544 /* set the number of data bits */
545 switch (cflag & CSIZE) {
546 case CS5:
547 dbg("%s - 5 bits/byte not supported", __func__);
548 spin_unlock_irqrestore(&priv->lock, flags);
549 goto err;
550 case CS6:
551 dbg("%s - 6 bits/byte not supported", __func__);
552 spin_unlock_irqrestore(&priv->lock, flags);
553 goto err;
554 case CS7:
555 priv->cfg.databits = kl5kusb105a_dtb_7;
556 break;
557 case CS8:
558 priv->cfg.databits = kl5kusb105a_dtb_8;
559 break;
560 default:
561 dev_err(&port->dev,
562 "CSIZE was not CS5-CS8, using default of 8\n");
563 priv->cfg.databits = kl5kusb105a_dtb_8;
564 break;
565 }
566 }
567
568 /*
569 * Update line control register (LCR)
570 */
571 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))
572 || (cflag & CSTOPB) != (old_cflag & CSTOPB)) {
573 /* Not currently supported */
574 tty->termios->c_cflag &= ~(PARENB|PARODD|CSTOPB);
575 #if 0
576 priv->last_lcr = 0;
577
578 /* set the parity */
579 if (cflag & PARENB)
580 priv->last_lcr |= (cflag & PARODD) ?
581 MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
582 else
583 priv->last_lcr |= MCT_U232_PARITY_NONE;
584
585 /* set the number of stop bits */
586 priv->last_lcr |= (cflag & CSTOPB) ?
587 MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
588
589 mct_u232_set_line_ctrl(serial, priv->last_lcr);
590 #endif
591 ;
592 }
593 /*
594 * Set flow control: well, I do not really now how to handle DTR/RTS.
595 * Just do what we have seen with SniffUSB on Win98.
596 */
597 if ((iflag & IXOFF) != (old_iflag & IXOFF)
598 || (iflag & IXON) != (old_iflag & IXON)
599 || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
600 /* Not currently supported */
601 tty->termios->c_cflag &= ~CRTSCTS;
602 /* Drop DTR/RTS if no flow control otherwise assert */
603 #if 0
604 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS))
605 priv->control_state |= TIOCM_DTR | TIOCM_RTS;
606 else
607 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
608 mct_u232_set_modem_ctrl(serial, priv->control_state);
609 #endif
610 ;
611 }
612 memcpy(cfg, &priv->cfg, sizeof(*cfg));
613 spin_unlock_irqrestore(&priv->lock, flags);
614
615 /* now commit changes to device */
616 klsi_105_chg_port_settings(port, cfg);
617 err:
618 kfree(cfg);
619 }
620
621 #if 0
622 static void mct_u232_break_ctl(struct tty_struct *tty, int break_state)
623 {
624 struct usb_serial_port *port = tty->driver_data;
625 struct usb_serial *serial = port->serial;
626 struct mct_u232_private *priv =
627 (struct mct_u232_private *)port->private;
628 unsigned char lcr = priv->last_lcr;
629
630 dbg("%sstate=%d", __func__, break_state);
631
632 /* LOCKING */
633 if (break_state)
634 lcr |= MCT_U232_SET_BREAK;
635
636 mct_u232_set_line_ctrl(serial, lcr);
637 }
638 #endif
639
640 static int klsi_105_tiocmget(struct tty_struct *tty)
641 {
642 struct usb_serial_port *port = tty->driver_data;
643 struct klsi_105_private *priv = usb_get_serial_port_data(port);
644 unsigned long flags;
645 int rc;
646 unsigned long line_state;
647 dbg("%s - request, just guessing", __func__);
648
649 rc = klsi_105_get_line_state(port, &line_state);
650 if (rc < 0) {
651 dev_err(&port->dev,
652 "Reading line control failed (error = %d)\n", rc);
653 /* better return value? EAGAIN? */
654 return rc;
655 }
656
657 spin_lock_irqsave(&priv->lock, flags);
658 priv->line_state = line_state;
659 spin_unlock_irqrestore(&priv->lock, flags);
660 dbg("%s - read line state 0x%lx", __func__, line_state);
661 return (int)line_state;
662 }
663
664 static int klsi_105_tiocmset(struct tty_struct *tty,
665 unsigned int set, unsigned int clear)
666 {
667 int retval = -EINVAL;
668
669 dbg("%s", __func__);
670
671 /* if this ever gets implemented, it should be done something like this:
672 struct usb_serial *serial = port->serial;
673 struct klsi_105_private *priv = usb_get_serial_port_data(port);
674 unsigned long flags;
675 int control;
676
677 spin_lock_irqsave (&priv->lock, flags);
678 if (set & TIOCM_RTS)
679 priv->control_state |= TIOCM_RTS;
680 if (set & TIOCM_DTR)
681 priv->control_state |= TIOCM_DTR;
682 if (clear & TIOCM_RTS)
683 priv->control_state &= ~TIOCM_RTS;
684 if (clear & TIOCM_DTR)
685 priv->control_state &= ~TIOCM_DTR;
686 control = priv->control_state;
687 spin_unlock_irqrestore (&priv->lock, flags);
688 retval = mct_u232_set_modem_ctrl(serial, control);
689 */
690 return retval;
691 }
692
693
694 static int __init klsi_105_init(void)
695 {
696 int retval;
697 retval = usb_serial_register(&kl5kusb105d_device);
698 if (retval)
699 goto failed_usb_serial_register;
700 retval = usb_register(&kl5kusb105d_driver);
701 if (retval)
702 goto failed_usb_register;
703
704 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
705 DRIVER_DESC "\n");
706 return 0;
707 failed_usb_register:
708 usb_serial_deregister(&kl5kusb105d_device);
709 failed_usb_serial_register:
710 return retval;
711 }
712
713 static void __exit klsi_105_exit(void)
714 {
715 usb_deregister(&kl5kusb105d_driver);
716 usb_serial_deregister(&kl5kusb105d_device);
717 }
718
719
720 module_init(klsi_105_init);
721 module_exit(klsi_105_exit);
722
723 MODULE_AUTHOR(DRIVER_AUTHOR);
724 MODULE_DESCRIPTION(DRIVER_DESC);
725 MODULE_LICENSE("GPL");
726
727
728 module_param(debug, bool, S_IRUGO | S_IWUSR);
729 MODULE_PARM_DESC(debug, "enable extensive debugging messages");