Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/drivers/usb/serial/kl5kusb105.c

  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/slab.h>
 41 #include <linux/tty.h>
 42 #include <linux/tty_driver.h>
 43 #include <linux/tty_flip.h>
 44 #include <linux/module.h>
 45 #include <linux/uaccess.h>
 46 #include <asm/unaligned.h>
 47 #include <linux/usb.h>
 48 #include <linux/usb/serial.h>
 49 #include "kl5kusb105.h"
 50 
 51 #define DRIVER_AUTHOR "Utz-Uwe Haus <haus@uuhaus.de>, Johan Hovold <jhovold@gmail.com>"
 52 #define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver"
 53 
 54 
 55 /*
 56  * Function prototypes
 57  */
 58 static int klsi_105_port_probe(struct usb_serial_port *port);
 59 static int klsi_105_port_remove(struct usb_serial_port *port);
 60 static int  klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port);
 61 static void klsi_105_close(struct usb_serial_port *port);
 62 static void klsi_105_set_termios(struct tty_struct *tty,
 63                         struct usb_serial_port *port, struct ktermios *old);
 64 static int  klsi_105_tiocmget(struct tty_struct *tty);
 65 static int  klsi_105_tiocmset(struct tty_struct *tty,
 66                         unsigned int set, unsigned int clear);
 67 static void klsi_105_process_read_urb(struct urb *urb);
 68 static int klsi_105_prepare_write_buffer(struct usb_serial_port *port,
 69                                                 void *dest, size_t size);
 70 
 71 /*
 72  * All of the device info needed for the KLSI converters.
 73  */
 74 static const struct usb_device_id id_table[] = {
 75         { USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) },
 76         { USB_DEVICE(KLSI_VID, KLSI_KL5KUSB105D_PID) },
 77         { }             /* Terminating entry */
 78 };
 79 
 80 MODULE_DEVICE_TABLE(usb, id_table);
 81 
 82 static struct usb_serial_driver kl5kusb105d_device = {
 83         .driver = {
 84                 .owner =        THIS_MODULE,
 85                 .name =         "kl5kusb105d",
 86         },
 87         .description =          "KL5KUSB105D / PalmConnect",
 88         .id_table =             id_table,
 89         .num_ports =            1,
 90         .bulk_out_size =        64,
 91         .open =                 klsi_105_open,
 92         .close =                klsi_105_close,
 93         .set_termios =          klsi_105_set_termios,
 94         /*.break_ctl =          klsi_105_break_ctl,*/
 95         .tiocmget =             klsi_105_tiocmget,
 96         .tiocmset =             klsi_105_tiocmset,
 97         .port_probe =           klsi_105_port_probe,
 98         .port_remove =          klsi_105_port_remove,
 99         .throttle =             usb_serial_generic_throttle,
100         .unthrottle =           usb_serial_generic_unthrottle,
101         .process_read_urb =     klsi_105_process_read_urb,
102         .prepare_write_buffer = klsi_105_prepare_write_buffer,
103 };
104 
105 static struct usb_serial_driver * const serial_drivers[] = {
106         &kl5kusb105d_device, NULL
107 };
108 
109 struct klsi_105_port_settings {
110         __u8    pktlen;         /* always 5, it seems */
111         __u8    baudrate;
112         __u8    databits;
113         __u8    unknown1;
114         __u8    unknown2;
115 } __attribute__ ((packed));
116 
117 struct klsi_105_private {
118         struct klsi_105_port_settings   cfg;
119         struct ktermios                 termios;
120         unsigned long                   line_state; /* modem line settings */
121         spinlock_t                      lock;
122 };
123 
124 
125 /*
126  * Handle vendor specific USB requests
127  */
128 
129 
130 #define KLSI_TIMEOUT     5000 /* default urb timeout */
131 
132 static int klsi_105_chg_port_settings(struct usb_serial_port *port,
133                                       struct klsi_105_port_settings *settings)
134 {
135         int rc;
136 
137         rc = usb_control_msg(port->serial->dev,
138                         usb_sndctrlpipe(port->serial->dev, 0),
139                         KL5KUSB105A_SIO_SET_DATA,
140                         USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE,
141                         0, /* value */
142                         0, /* index */
143                         settings,
144                         sizeof(struct klsi_105_port_settings),
145                         KLSI_TIMEOUT);
146         if (rc < 0)
147                 dev_err(&port->dev,
148                         "Change port settings failed (error = %d)\n", rc);
149         dev_info(&port->serial->dev->dev,
150                  "%d byte block, baudrate %x, databits %d, u1 %d, u2 %d\n",
151                  settings->pktlen, settings->baudrate, settings->databits,
152                  settings->unknown1, settings->unknown2);
153         return rc;
154 }
155 
156 /* translate a 16-bit status value from the device to linux's TIO bits */
157 static unsigned long klsi_105_status2linestate(const __u16 status)
158 {
159         unsigned long res = 0;
160 
161         res =   ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0)
162               | ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0)
163               ;
164 
165         return res;
166 }
167 
168 /*
169  * Read line control via vendor command and return result through
170  * *line_state_p
171  */
172 /* It seems that the status buffer has always only 2 bytes length */
173 #define KLSI_STATUSBUF_LEN      2
174 static int klsi_105_get_line_state(struct usb_serial_port *port,
175                                    unsigned long *line_state_p)
176 {
177         int rc;
178         u8 *status_buf;
179         __u16 status;
180 
181         dev_info(&port->serial->dev->dev, "sending SIO Poll request\n");
182 
183         status_buf = kmalloc(KLSI_STATUSBUF_LEN, GFP_KERNEL);
184         if (!status_buf)
185                 return -ENOMEM;
186 
187         status_buf[0] = 0xff;
188         status_buf[1] = 0xff;
189         rc = usb_control_msg(port->serial->dev,
190                              usb_rcvctrlpipe(port->serial->dev, 0),
191                              KL5KUSB105A_SIO_POLL,
192                              USB_TYPE_VENDOR | USB_DIR_IN,
193                              0, /* value */
194                              0, /* index */
195                              status_buf, KLSI_STATUSBUF_LEN,
196                              10000
197                              );
198         if (rc < 0)
199                 dev_err(&port->dev, "Reading line status failed (error = %d)\n",
200                         rc);
201         else {
202                 status = get_unaligned_le16(status_buf);
203 
204                 dev_info(&port->serial->dev->dev, "read status %x %x\n",
205                          status_buf[0], status_buf[1]);
206 
207                 *line_state_p = klsi_105_status2linestate(status);
208         }
209 
210         kfree(status_buf);
211         return rc;
212 }
213 
214 
215 /*
216  * Driver's tty interface functions
217  */
218 
219 static int klsi_105_port_probe(struct usb_serial_port *port)
220 {
221         struct klsi_105_private *priv;
222 
223         priv = kmalloc(sizeof(*priv), GFP_KERNEL);
224         if (!priv)
225                 return -ENOMEM;
226 
227         /* set initial values for control structures */
228         priv->cfg.pktlen    = 5;
229         priv->cfg.baudrate  = kl5kusb105a_sio_b9600;
230         priv->cfg.databits  = kl5kusb105a_dtb_8;
231         priv->cfg.unknown1  = 0;
232         priv->cfg.unknown2  = 1;
233 
234         priv->line_state    = 0;
235 
236         spin_lock_init(&priv->lock);
237 
238         /* priv->termios is left uninitialized until port opening */
239 
240         usb_set_serial_port_data(port, priv);
241 
242         return 0;
243 }
244 
245 static int klsi_105_port_remove(struct usb_serial_port *port)
246 {
247         struct klsi_105_private *priv;
248 
249         priv = usb_get_serial_port_data(port);
250         kfree(priv);
251 
252         return 0;
253 }
254 
255 static int  klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port)
256 {
257         struct klsi_105_private *priv = usb_get_serial_port_data(port);
258         int retval = 0;
259         int rc;
260         int i;
261         unsigned long line_state;
262         struct klsi_105_port_settings *cfg;
263         unsigned long flags;
264 
265         /* Do a defined restart:
266          * Set up sane default baud rate and send the 'READ_ON'
267          * vendor command.
268          * FIXME: set modem line control (how?)
269          * Then read the modem line control and store values in
270          * priv->line_state.
271          */
272         cfg = kmalloc(sizeof(*cfg), GFP_KERNEL);
273         if (!cfg)
274                 return -ENOMEM;
275 
276         cfg->pktlen   = 5;
277         cfg->baudrate = kl5kusb105a_sio_b9600;
278         cfg->databits = kl5kusb105a_dtb_8;
279         cfg->unknown1 = 0;
280         cfg->unknown2 = 1;
281         klsi_105_chg_port_settings(port, cfg);
282 
283         /* set up termios structure */
284         spin_lock_irqsave(&priv->lock, flags);
285         priv->termios.c_iflag = tty->termios.c_iflag;
286         priv->termios.c_oflag = tty->termios.c_oflag;
287         priv->termios.c_cflag = tty->termios.c_cflag;
288         priv->termios.c_lflag = tty->termios.c_lflag;
289         for (i = 0; i < NCCS; i++)
290                 priv->termios.c_cc[i] = tty->termios.c_cc[i];
291         priv->cfg.pktlen   = cfg->pktlen;
292         priv->cfg.baudrate = cfg->baudrate;
293         priv->cfg.databits = cfg->databits;
294         priv->cfg.unknown1 = cfg->unknown1;
295         priv->cfg.unknown2 = cfg->unknown2;
296         spin_unlock_irqrestore(&priv->lock, flags);
297 
298         /* READ_ON and urb submission */
299         rc = usb_serial_generic_open(tty, port);
300         if (rc) {
301                 retval = rc;
302                 goto exit;
303         }
304 
305         rc = usb_control_msg(port->serial->dev,
306                              usb_sndctrlpipe(port->serial->dev, 0),
307                              KL5KUSB105A_SIO_CONFIGURE,
308                              USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE,
309                              KL5KUSB105A_SIO_CONFIGURE_READ_ON,
310                              0, /* index */
311                              NULL,
312                              0,
313                              KLSI_TIMEOUT);
314         if (rc < 0) {
315                 dev_err(&port->dev, "Enabling read failed (error = %d)\n", rc);
316                 retval = rc;
317         } else
318                 dev_dbg(&port->dev, "%s - enabled reading\n", __func__);
319 
320         rc = klsi_105_get_line_state(port, &line_state);
321         if (rc >= 0) {
322                 spin_lock_irqsave(&priv->lock, flags);
323                 priv->line_state = line_state;
324                 spin_unlock_irqrestore(&priv->lock, flags);
325                 dev_dbg(&port->dev, "%s - read line state 0x%lx\n", __func__, line_state);
326                 retval = 0;
327         } else
328                 retval = rc;
329 
330 exit:
331         kfree(cfg);
332         return retval;
333 }
334 
335 static void klsi_105_close(struct usb_serial_port *port)
336 {
337         int rc;
338 
339         /* send READ_OFF */
340         rc = usb_control_msg(port->serial->dev,
341                              usb_sndctrlpipe(port->serial->dev, 0),
342                              KL5KUSB105A_SIO_CONFIGURE,
343                              USB_TYPE_VENDOR | USB_DIR_OUT,
344                              KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
345                              0, /* index */
346                              NULL, 0,
347                              KLSI_TIMEOUT);
348         if (rc < 0)
349                 dev_err(&port->dev, "failed to disable read: %d\n", rc);
350 
351         /* shutdown our bulk reads and writes */
352         usb_serial_generic_close(port);
353 }
354 
355 /* We need to write a complete 64-byte data block and encode the
356  * number actually sent in the first double-byte, LSB-order. That
357  * leaves at most 62 bytes of payload.
358  */
359 #define KLSI_HDR_LEN            2
360 static int klsi_105_prepare_write_buffer(struct usb_serial_port *port,
361                                                 void *dest, size_t size)
362 {
363         unsigned char *buf = dest;
364         int count;
365 
366         count = kfifo_out_locked(&port->write_fifo, buf + KLSI_HDR_LEN, size,
367                                                                 &port->lock);
368         put_unaligned_le16(count, buf);
369 
370         return count + KLSI_HDR_LEN;
371 }
372 
373 /* The data received is preceded by a length double-byte in LSB-first order.
374  */
375 static void klsi_105_process_read_urb(struct urb *urb)
376 {
377         struct usb_serial_port *port = urb->context;
378         unsigned char *data = urb->transfer_buffer;
379         unsigned len;
380 
381         /* empty urbs seem to happen, we ignore them */
382         if (!urb->actual_length)
383                 return;
384 
385         if (urb->actual_length <= KLSI_HDR_LEN) {
386                 dev_dbg(&port->dev, "%s - malformed packet\n", __func__);
387                 return;
388         }
389 
390         len = get_unaligned_le16(data);
391         if (len > urb->actual_length - KLSI_HDR_LEN) {
392                 dev_dbg(&port->dev, "%s - packet length mismatch\n", __func__);
393                 len = urb->actual_length - KLSI_HDR_LEN;
394         }
395 
396         tty_insert_flip_string(&port->port, data + KLSI_HDR_LEN, len);
397         tty_flip_buffer_push(&port->port);
398 }
399 
400 static void klsi_105_set_termios(struct tty_struct *tty,
401                                  struct usb_serial_port *port,
402                                  struct ktermios *old_termios)
403 {
404         struct klsi_105_private *priv = usb_get_serial_port_data(port);
405         struct device *dev = &port->dev;
406         unsigned int iflag = tty->termios.c_iflag;
407         unsigned int old_iflag = old_termios->c_iflag;
408         unsigned int cflag = tty->termios.c_cflag;
409         unsigned int old_cflag = old_termios->c_cflag;
410         struct klsi_105_port_settings *cfg;
411         unsigned long flags;
412         speed_t baud;
413 
414         cfg = kmalloc(sizeof(*cfg), GFP_KERNEL);
415         if (!cfg)
416                 return;
417 
418         /* lock while we are modifying the settings */
419         spin_lock_irqsave(&priv->lock, flags);
420 
421         /*
422          * Update baud rate
423          */
424         baud = tty_get_baud_rate(tty);
425 
426         if ((cflag & CBAUD) != (old_cflag & CBAUD)) {
427                 /* reassert DTR and (maybe) RTS on transition from B0 */
428                 if ((old_cflag & CBAUD) == B0) {
429                         dev_dbg(dev, "%s: baud was B0\n", __func__);
430 #if 0
431                         priv->control_state |= TIOCM_DTR;
432                         /* don't set RTS if using hardware flow control */
433                         if (!(old_cflag & CRTSCTS))
434                                 priv->control_state |= TIOCM_RTS;
435                         mct_u232_set_modem_ctrl(serial, priv->control_state);
436 #endif
437                 }
438         }
439         switch (baud) {
440         case 0: /* handled below */
441                 break;
442         case 1200:
443                 priv->cfg.baudrate = kl5kusb105a_sio_b1200;
444                 break;
445         case 2400:
446                 priv->cfg.baudrate = kl5kusb105a_sio_b2400;
447                 break;
448         case 4800:
449                 priv->cfg.baudrate = kl5kusb105a_sio_b4800;
450                 break;
451         case 9600:
452                 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
453                 break;
454         case 19200:
455                 priv->cfg.baudrate = kl5kusb105a_sio_b19200;
456                 break;
457         case 38400:
458                 priv->cfg.baudrate = kl5kusb105a_sio_b38400;
459                 break;
460         case 57600:
461                 priv->cfg.baudrate = kl5kusb105a_sio_b57600;
462                 break;
463         case 115200:
464                 priv->cfg.baudrate = kl5kusb105a_sio_b115200;
465                 break;
466         default:
467                 dev_dbg(dev, "unsupported baudrate, using 9600\n");
468                 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
469                 baud = 9600;
470                 break;
471         }
472         if ((cflag & CBAUD) == B0) {
473                 dev_dbg(dev, "%s: baud is B0\n", __func__);
474                 /* Drop RTS and DTR */
475                 /* maybe this should be simulated by sending read
476                  * disable and read enable messages?
477                  */
478                 ;
479 #if 0
480                 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
481                 mct_u232_set_modem_ctrl(serial, priv->control_state);
482 #endif
483         }
484         tty_encode_baud_rate(tty, baud, baud);
485 
486         if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
487                 /* set the number of data bits */
488                 switch (cflag & CSIZE) {
489                 case CS5:
490                         dev_dbg(dev, "%s - 5 bits/byte not supported\n", __func__);
491                         spin_unlock_irqrestore(&priv->lock, flags);
492                         goto err;
493                 case CS6:
494                         dev_dbg(dev, "%s - 6 bits/byte not supported\n", __func__);
495                         spin_unlock_irqrestore(&priv->lock, flags);
496                         goto err;
497                 case CS7:
498                         priv->cfg.databits = kl5kusb105a_dtb_7;
499                         break;
500                 case CS8:
501                         priv->cfg.databits = kl5kusb105a_dtb_8;
502                         break;
503                 default:
504                         dev_err(dev, "CSIZE was not CS5-CS8, using default of 8\n");
505                         priv->cfg.databits = kl5kusb105a_dtb_8;
506                         break;
507                 }
508         }
509 
510         /*
511          * Update line control register (LCR)
512          */
513         if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))
514             || (cflag & CSTOPB) != (old_cflag & CSTOPB)) {
515                 /* Not currently supported */
516                 tty->termios.c_cflag &= ~(PARENB|PARODD|CSTOPB);
517 #if 0
518                 priv->last_lcr = 0;
519 
520                 /* set the parity */
521                 if (cflag & PARENB)
522                         priv->last_lcr |= (cflag & PARODD) ?
523                                 MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
524                 else
525                         priv->last_lcr |= MCT_U232_PARITY_NONE;
526 
527                 /* set the number of stop bits */
528                 priv->last_lcr |= (cflag & CSTOPB) ?
529                         MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
530 
531                 mct_u232_set_line_ctrl(serial, priv->last_lcr);
532 #endif
533                 ;
534         }
535         /*
536          * Set flow control: well, I do not really now how to handle DTR/RTS.
537          * Just do what we have seen with SniffUSB on Win98.
538          */
539         if ((iflag & IXOFF) != (old_iflag & IXOFF)
540             || (iflag & IXON) != (old_iflag & IXON)
541             ||  (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
542                 /* Not currently supported */
543                 tty->termios.c_cflag &= ~CRTSCTS;
544                 /* Drop DTR/RTS if no flow control otherwise assert */
545 #if 0
546                 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS))
547                         priv->control_state |= TIOCM_DTR | TIOCM_RTS;
548                 else
549                         priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
550                 mct_u232_set_modem_ctrl(serial, priv->control_state);
551 #endif
552                 ;
553         }
554         memcpy(cfg, &priv->cfg, sizeof(*cfg));
555         spin_unlock_irqrestore(&priv->lock, flags);
556 
557         /* now commit changes to device */
558         klsi_105_chg_port_settings(port, cfg);
559 err:
560         kfree(cfg);
561 }
562 
563 #if 0
564 static void mct_u232_break_ctl(struct tty_struct *tty, int break_state)
565 {
566         struct usb_serial_port *port = tty->driver_data;
567         struct usb_serial *serial = port->serial;
568         struct mct_u232_private *priv =
569                                 (struct mct_u232_private *)port->private;
570         unsigned char lcr = priv->last_lcr;
571 
572         dev_dbg(&port->dev, "%s - state=%d\n", __func__, break_state);
573 
574         /* LOCKING */
575         if (break_state)
576                 lcr |= MCT_U232_SET_BREAK;
577 
578         mct_u232_set_line_ctrl(serial, lcr);
579 }
580 #endif
581 
582 static int klsi_105_tiocmget(struct tty_struct *tty)
583 {
584         struct usb_serial_port *port = tty->driver_data;
585         struct klsi_105_private *priv = usb_get_serial_port_data(port);
586         unsigned long flags;
587         int rc;
588         unsigned long line_state;
589 
590         rc = klsi_105_get_line_state(port, &line_state);
591         if (rc < 0) {
592                 dev_err(&port->dev,
593                         "Reading line control failed (error = %d)\n", rc);
594                 /* better return value? EAGAIN? */
595                 return rc;
596         }
597 
598         spin_lock_irqsave(&priv->lock, flags);
599         priv->line_state = line_state;
600         spin_unlock_irqrestore(&priv->lock, flags);
601         dev_dbg(&port->dev, "%s - read line state 0x%lx\n", __func__, line_state);
602         return (int)line_state;
603 }
604 
605 static int klsi_105_tiocmset(struct tty_struct *tty,
606                              unsigned int set, unsigned int clear)
607 {
608         int retval = -EINVAL;
609 
610 /* if this ever gets implemented, it should be done something like this:
611         struct usb_serial *serial = port->serial;
612         struct klsi_105_private *priv = usb_get_serial_port_data(port);
613         unsigned long flags;
614         int control;
615 
616         spin_lock_irqsave (&priv->lock, flags);
617         if (set & TIOCM_RTS)
618                 priv->control_state |= TIOCM_RTS;
619         if (set & TIOCM_DTR)
620                 priv->control_state |= TIOCM_DTR;
621         if (clear & TIOCM_RTS)
622                 priv->control_state &= ~TIOCM_RTS;
623         if (clear & TIOCM_DTR)
624                 priv->control_state &= ~TIOCM_DTR;
625         control = priv->control_state;
626         spin_unlock_irqrestore (&priv->lock, flags);
627         retval = mct_u232_set_modem_ctrl(serial, control);
628 */
629         return retval;
630 }
631 
632 module_usb_serial_driver(serial_drivers, id_table);
633 
634 MODULE_AUTHOR(DRIVER_AUTHOR);
635 MODULE_DESCRIPTION(DRIVER_DESC);
636 MODULE_LICENSE("GPL");
637 

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