2 * Silicon Laboratories CP2101/CP2102 USB to RS232 serial adaptor driver
4 * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version
8 * 2 as published by the Free Software Foundation.
10 * Support to set flow control line levels using TIOCMGET and TIOCMSET
11 * thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow
12 * control thanks to Munir Nassar nassarmu@real-time.com
15 * Buffers are not flushed when the port is opened.
16 * Multiple calls to write() may fail with "Resource temporarily unavailable"
20 #include <linux/config.h>
21 #include <linux/kernel.h>
22 #include <linux/errno.h>
23 #include <linux/slab.h>
24 #include <linux/tty.h>
25 #include <linux/tty_flip.h>
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/usb.h>
29 #include <asm/uaccess.h>
30 #include "usb-serial.h"
35 #define DRIVER_VERSION "v0.05"
36 #define DRIVER_DESC "Silicon Labs CP2101/CP2102 RS232 serial adaptor driver"
41 static int cp2101_open(struct usb_serial_port
*, struct file
*);
42 static void cp2101_cleanup(struct usb_serial_port
*);
43 static void cp2101_close(struct usb_serial_port
*, struct file
*);
44 static void cp2101_get_termios(struct usb_serial_port
*);
45 static void cp2101_set_termios(struct usb_serial_port
*, struct termios
*);
46 static int cp2101_tiocmget (struct usb_serial_port
*, struct file
*);
47 static int cp2101_tiocmset (struct usb_serial_port
*, struct file
*,
48 unsigned int, unsigned int);
49 static void cp2101_break_ctl(struct usb_serial_port
*, int);
50 static int cp2101_startup (struct usb_serial
*);
51 static void cp2101_shutdown(struct usb_serial
*);
56 static struct usb_device_id id_table
[] = {
57 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
58 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
59 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
60 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
61 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
62 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
63 { } /* Terminating Entry */
66 MODULE_DEVICE_TABLE (usb
, id_table
);
68 static struct usb_driver cp2101_driver
= {
71 .probe
= usb_serial_probe
,
72 .disconnect
= usb_serial_disconnect
,
76 static struct usb_serial_driver cp2101_device
= {
82 .num_interrupt_in
= 0,
87 .close
= cp2101_close
,
88 .break_ctl
= cp2101_break_ctl
,
89 .set_termios
= cp2101_set_termios
,
90 .tiocmget
= cp2101_tiocmget
,
91 .tiocmset
= cp2101_tiocmset
,
92 .attach
= cp2101_startup
,
93 .shutdown
= cp2101_shutdown
,
96 /* Config request types */
97 #define REQTYPE_HOST_TO_DEVICE 0x41
98 #define REQTYPE_DEVICE_TO_HOST 0xc1
100 /* Config SET requests. To GET, add 1 to the request number */
101 #define CP2101_UART 0x00 /* Enable / Disable */
102 #define CP2101_BAUDRATE 0x01 /* (BAUD_RATE_GEN_FREQ / baudrate) */
103 #define CP2101_BITS 0x03 /* 0x(0)(databits)(parity)(stopbits) */
104 #define CP2101_BREAK 0x05 /* On / Off */
105 #define CP2101_CONTROL 0x07 /* Flow control line states */
106 #define CP2101_MODEMCTL 0x13 /* Modem controls */
107 #define CP2101_CONFIG_6 0x19 /* 6 bytes of config data ??? */
110 #define UART_ENABLE 0x0001
111 #define UART_DISABLE 0x0000
113 /* CP2101_BAUDRATE */
114 #define BAUD_RATE_GEN_FREQ 0x384000
117 #define BITS_DATA_MASK 0X0f00
118 #define BITS_DATA_5 0X0500
119 #define BITS_DATA_6 0X0600
120 #define BITS_DATA_7 0X0700
121 #define BITS_DATA_8 0X0800
122 #define BITS_DATA_9 0X0900
124 #define BITS_PARITY_MASK 0x00f0
125 #define BITS_PARITY_NONE 0x0000
126 #define BITS_PARITY_ODD 0x0010
127 #define BITS_PARITY_EVEN 0x0020
128 #define BITS_PARITY_MARK 0x0030
129 #define BITS_PARITY_SPACE 0x0040
131 #define BITS_STOP_MASK 0x000f
132 #define BITS_STOP_1 0x0000
133 #define BITS_STOP_1_5 0x0001
134 #define BITS_STOP_2 0x0002
137 #define BREAK_ON 0x0000
138 #define BREAK_OFF 0x0001
141 #define CONTROL_DTR 0x0001
142 #define CONTROL_RTS 0x0002
143 #define CONTROL_CTS 0x0010
144 #define CONTROL_DSR 0x0020
145 #define CONTROL_RING 0x0040
146 #define CONTROL_DCD 0x0080
147 #define CONTROL_WRITE_DTR 0x0100
148 #define CONTROL_WRITE_RTS 0x0200
152 * Reads from the CP2101 configuration registers
153 * 'size' is specified in bytes.
154 * 'data' is a pointer to a pre-allocated array of integers large
155 * enough to hold 'size' bytes (with 4 bytes to each integer)
157 static int cp2101_get_config(struct usb_serial_port
* port
, u8 request
,
158 unsigned int *data
, int size
)
160 struct usb_serial
*serial
= port
->serial
;
162 int result
, i
, length
;
164 /* Number of integers required to contain the array */
165 length
= (((size
- 1) | 3) + 1)/4;
167 buf
= kmalloc (length
* sizeof(u32
), GFP_KERNEL
);
168 memset(buf
, 0, length
* sizeof(u32
));
171 dev_err(&port
->dev
, "%s - out of memory.\n", __FUNCTION__
);
175 /* For get requests, the request number must be incremented */
178 /* Issue the request, attempting to read 'size' bytes */
179 result
= usb_control_msg (serial
->dev
,usb_rcvctrlpipe (serial
->dev
, 0),
180 request
, REQTYPE_DEVICE_TO_HOST
, 0x0000,
183 /* Convert data into an array of integers */
184 for (i
=0; i
<length
; i
++)
185 data
[i
] = le32_to_cpu(buf
[i
]);
189 if (result
!= size
) {
190 dev_err(&port
->dev
, "%s - Unable to send config request, "
191 "request=0x%x size=%d result=%d\n",
192 __FUNCTION__
, request
, size
, result
);
201 * Writes to the CP2101 configuration registers
202 * Values less than 16 bits wide are sent directly
203 * 'size' is specified in bytes.
205 static int cp2101_set_config(struct usb_serial_port
* port
, u8 request
,
206 unsigned int *data
, int size
)
208 struct usb_serial
*serial
= port
->serial
;
210 int result
, i
, length
;
212 /* Number of integers required to contain the array */
213 length
= (((size
- 1) | 3) + 1)/4;
215 buf
= kmalloc(length
* sizeof(u32
), GFP_KERNEL
);
217 dev_err(&port
->dev
, "%s - out of memory.\n",
222 /* Array of integers into bytes */
223 for (i
= 0; i
< length
; i
++)
224 buf
[i
] = cpu_to_le32(data
[i
]);
227 result
= usb_control_msg (serial
->dev
,
228 usb_sndctrlpipe(serial
->dev
, 0),
229 request
, REQTYPE_HOST_TO_DEVICE
, 0x0000,
232 result
= usb_control_msg (serial
->dev
,
233 usb_sndctrlpipe(serial
->dev
, 0),
234 request
, REQTYPE_HOST_TO_DEVICE
, data
[0],
240 if ((size
> 2 && result
!= size
) || result
< 0) {
241 dev_err(&port
->dev
, "%s - Unable to send request, "
242 "request=0x%x size=%d result=%d\n",
243 __FUNCTION__
, request
, size
, result
);
247 /* Single data value */
248 result
= usb_control_msg (serial
->dev
,
249 usb_sndctrlpipe(serial
->dev
, 0),
250 request
, REQTYPE_HOST_TO_DEVICE
, data
[0],
256 * cp2101_set_config_single
257 * Convenience function for calling cp2101_set_config on single data values
258 * without requiring an integer pointer
260 static inline int cp2101_set_config_single(struct usb_serial_port
* port
,
261 u8 request
, unsigned int data
)
263 return cp2101_set_config(port
, request
, &data
, 2);
266 static int cp2101_open (struct usb_serial_port
*port
, struct file
*filp
)
268 struct usb_serial
*serial
= port
->serial
;
271 dbg("%s - port %d", __FUNCTION__
, port
->number
);
273 if (cp2101_set_config_single(port
, CP2101_UART
, UART_ENABLE
)) {
274 dev_err(&port
->dev
, "%s - Unable to enable UART\n",
279 /* Start reading from the device */
280 usb_fill_bulk_urb (port
->read_urb
, serial
->dev
,
281 usb_rcvbulkpipe(serial
->dev
,
282 port
->bulk_in_endpointAddress
),
283 port
->read_urb
->transfer_buffer
,
284 port
->read_urb
->transfer_buffer_length
,
285 serial
->type
->read_bulk_callback
,
287 result
= usb_submit_urb(port
->read_urb
, GFP_KERNEL
);
289 dev_err(&port
->dev
, "%s - failed resubmitting read urb, "
290 "error %d\n", __FUNCTION__
, result
);
294 /* Configure the termios structure */
295 cp2101_get_termios(port
);
297 /* Set the DTR and RTS pins low */
298 cp2101_tiocmset(port
, NULL
, TIOCM_DTR
| TIOCM_RTS
, 0);
303 static void cp2101_cleanup (struct usb_serial_port
*port
)
305 struct usb_serial
*serial
= port
->serial
;
307 dbg("%s - port %d", __FUNCTION__
, port
->number
);
310 /* shutdown any bulk reads that might be going on */
311 if (serial
->num_bulk_out
)
312 usb_kill_urb(port
->write_urb
);
313 if (serial
->num_bulk_in
)
314 usb_kill_urb(port
->read_urb
);
318 static void cp2101_close (struct usb_serial_port
*port
, struct file
* filp
)
320 dbg("%s - port %d", __FUNCTION__
, port
->number
);
322 /* shutdown our urbs */
323 dbg("%s - shutting down urbs", __FUNCTION__
);
324 usb_kill_urb(port
->write_urb
);
325 usb_kill_urb(port
->read_urb
);
327 cp2101_set_config_single(port
, CP2101_UART
, UART_DISABLE
);
332 * Reads the baud rate, data bits, parity, stop bits and flow control mode
333 * from the device, corrects any unsupported values, and configures the
334 * termios structure to reflect the state of the device
336 static void cp2101_get_termios (struct usb_serial_port
*port
)
338 unsigned int cflag
, modem_ctl
[4];
342 dbg("%s - port %d", __FUNCTION__
, port
->number
);
344 if ((!port
->tty
) || (!port
->tty
->termios
)) {
345 dbg("%s - no tty structures", __FUNCTION__
);
348 cflag
= port
->tty
->termios
->c_cflag
;
350 cp2101_get_config(port
, CP2101_BAUDRATE
, &baud
, 2);
351 /* Convert to baudrate */
353 baud
= BAUD_RATE_GEN_FREQ
/ baud
;
355 dbg("%s - baud rate = %d", __FUNCTION__
, baud
);
359 * The baud rates which are commented out below
360 * appear to be supported by the device
361 * but are non-standard
363 case 600: cflag
|= B600
; break;
364 case 1200: cflag
|= B1200
; break;
365 case 1800: cflag
|= B1800
; break;
366 case 2400: cflag
|= B2400
; break;
367 case 4800: cflag
|= B4800
; break;
368 /*case 7200: cflag |= B7200; break;*/
369 case 9600: cflag
|= B9600
; break;
370 /*case 14400: cflag |= B14400; break;*/
371 case 19200: cflag
|= B19200
; break;
372 /*case 28800: cflag |= B28800; break;*/
373 case 38400: cflag
|= B38400
; break;
374 /*case 55854: cflag |= B55054; break;*/
375 case 57600: cflag
|= B57600
; break;
376 case 115200: cflag
|= B115200
; break;
377 /*case 127117: cflag |= B127117; break;*/
378 case 230400: cflag
|= B230400
; break;
379 case 460800: cflag
|= B460800
; break;
380 case 921600: cflag
|= B921600
; break;
381 /*case 3686400: cflag |= B3686400; break;*/
383 dbg("%s - Baud rate is not supported, "
384 "using 9600 baud", __FUNCTION__
);
386 cp2101_set_config_single(port
, CP2101_BAUDRATE
,
387 (BAUD_RATE_GEN_FREQ
/9600));
391 cp2101_get_config(port
, CP2101_BITS
, &bits
, 2);
393 switch(bits
& BITS_DATA_MASK
) {
395 dbg("%s - data bits = 5", __FUNCTION__
);
399 dbg("%s - data bits = 6", __FUNCTION__
);
403 dbg("%s - data bits = 7", __FUNCTION__
);
407 dbg("%s - data bits = 8", __FUNCTION__
);
411 dbg("%s - data bits = 9 (not supported, "
412 "using 8 data bits)", __FUNCTION__
);
414 bits
&= ~BITS_DATA_MASK
;
416 cp2101_set_config(port
, CP2101_BITS
, &bits
, 2);
419 dbg("%s - Unknown number of data bits, "
420 "using 8", __FUNCTION__
);
422 bits
&= ~BITS_DATA_MASK
;
424 cp2101_set_config(port
, CP2101_BITS
, &bits
, 2);
428 switch(bits
& BITS_PARITY_MASK
) {
429 case BITS_PARITY_NONE
:
430 dbg("%s - parity = NONE", __FUNCTION__
);
433 case BITS_PARITY_ODD
:
434 dbg("%s - parity = ODD", __FUNCTION__
);
435 cflag
|= (PARENB
|PARODD
);
437 case BITS_PARITY_EVEN
:
438 dbg("%s - parity = EVEN", __FUNCTION__
);
442 case BITS_PARITY_MARK
:
443 dbg("%s - parity = MARK (not supported, "
444 "disabling parity)", __FUNCTION__
);
446 bits
&= ~BITS_PARITY_MASK
;
447 cp2101_set_config(port
, CP2101_BITS
, &bits
, 2);
449 case BITS_PARITY_SPACE
:
450 dbg("%s - parity = SPACE (not supported, "
451 "disabling parity)", __FUNCTION__
);
453 bits
&= ~BITS_PARITY_MASK
;
454 cp2101_set_config(port
, CP2101_BITS
, &bits
, 2);
457 dbg("%s - Unknown parity mode, "
458 "disabling parity", __FUNCTION__
);
460 bits
&= ~BITS_PARITY_MASK
;
461 cp2101_set_config(port
, CP2101_BITS
, &bits
, 2);
466 switch(bits
& BITS_STOP_MASK
) {
468 dbg("%s - stop bits = 1", __FUNCTION__
);
471 dbg("%s - stop bits = 1.5 (not supported, "
472 "using 1 stop bit)", __FUNCTION__
);
473 bits
&= ~BITS_STOP_MASK
;
474 cp2101_set_config(port
, CP2101_BITS
, &bits
, 2);
477 dbg("%s - stop bits = 2", __FUNCTION__
);
481 dbg("%s - Unknown number of stop bits, "
482 "using 1 stop bit", __FUNCTION__
);
483 bits
&= ~BITS_STOP_MASK
;
484 cp2101_set_config(port
, CP2101_BITS
, &bits
, 2);
488 cp2101_get_config(port
, CP2101_MODEMCTL
, modem_ctl
, 16);
489 if (modem_ctl
[0] & 0x0008) {
490 dbg("%s - flow control = CRTSCTS", __FUNCTION__
);
493 dbg("%s - flow control = NONE", __FUNCTION__
);
497 port
->tty
->termios
->c_cflag
= cflag
;
500 static void cp2101_set_termios (struct usb_serial_port
*port
,
501 struct termios
*old_termios
)
503 unsigned int cflag
, old_cflag
=0;
505 unsigned int modem_ctl
[4];
507 dbg("%s - port %d", __FUNCTION__
, port
->number
);
509 if ((!port
->tty
) || (!port
->tty
->termios
)) {
510 dbg("%s - no tty structures", __FUNCTION__
);
513 cflag
= port
->tty
->termios
->c_cflag
;
515 /* Check that they really want us to change something */
517 if ((cflag
== old_termios
->c_cflag
) &&
518 (RELEVANT_IFLAG(port
->tty
->termios
->c_iflag
)
519 == RELEVANT_IFLAG(old_termios
->c_iflag
))) {
520 dbg("%s - nothing to change...", __FUNCTION__
);
524 old_cflag
= old_termios
->c_cflag
;
527 /* If the baud rate is to be updated*/
528 if ((cflag
& CBAUD
) != (old_cflag
& CBAUD
)) {
529 switch (cflag
& CBAUD
) {
531 * The baud rates which are commented out below
532 * appear to be supported by the device
533 * but are non-standard
535 case B0
: baud
= 0; break;
536 case B600
: baud
= 600; break;
537 case B1200
: baud
= 1200; break;
538 case B1800
: baud
= 1800; break;
539 case B2400
: baud
= 2400; break;
540 case B4800
: baud
= 4800; break;
541 /*case B7200: baud = 7200; break;*/
542 case B9600
: baud
= 9600; break;
543 /*ase B14400: baud = 14400; break;*/
544 case B19200
: baud
= 19200; break;
545 /*case B28800: baud = 28800; break;*/
546 case B38400
: baud
= 38400; break;
547 /*case B55854: baud = 55054; break;*/
548 case B57600
: baud
= 57600; break;
549 case B115200
: baud
= 115200; break;
550 /*case B127117: baud = 127117; break;*/
551 case B230400
: baud
= 230400; break;
552 case B460800
: baud
= 460800; break;
553 case B921600
: baud
= 921600; break;
554 /*case B3686400: baud = 3686400; break;*/
556 dev_err(&port
->dev
, "cp2101 driver does not "
557 "support the baudrate requested\n");
562 dbg("%s - Setting baud rate to %d baud", __FUNCTION__
,
564 if (cp2101_set_config_single(port
, CP2101_BAUDRATE
,
565 (BAUD_RATE_GEN_FREQ
/ baud
)))
566 dev_err(&port
->dev
, "Baud rate requested not "
567 "supported by device\n");
571 /* If the number of data bits is to be updated */
572 if ((cflag
& CSIZE
) != (old_cflag
& CSIZE
)) {
573 cp2101_get_config(port
, CP2101_BITS
, &bits
, 2);
574 bits
&= ~BITS_DATA_MASK
;
575 switch (cflag
& CSIZE
) {
578 dbg("%s - data bits = 5", __FUNCTION__
);
582 dbg("%s - data bits = 6", __FUNCTION__
);
586 dbg("%s - data bits = 7", __FUNCTION__
);
590 dbg("%s - data bits = 8", __FUNCTION__
);
594 dbg("%s - data bits = 9", __FUNCTION__);
597 dev_err(&port
->dev
, "cp2101 driver does not "
598 "support the number of bits requested,"
599 " using 8 bit mode\n");
603 if (cp2101_set_config(port
, CP2101_BITS
, &bits
, 2))
604 dev_err(&port
->dev
, "Number of data bits requested "
605 "not supported by device\n");
608 if ((cflag
& (PARENB
|PARODD
)) != (old_cflag
& (PARENB
|PARODD
))) {
609 cp2101_get_config(port
, CP2101_BITS
, &bits
, 2);
610 bits
&= ~BITS_PARITY_MASK
;
611 if (cflag
& PARENB
) {
612 if (cflag
& PARODD
) {
613 bits
|= BITS_PARITY_ODD
;
614 dbg("%s - parity = ODD", __FUNCTION__
);
616 bits
|= BITS_PARITY_EVEN
;
617 dbg("%s - parity = EVEN", __FUNCTION__
);
620 if (cp2101_set_config(port
, CP2101_BITS
, &bits
, 2))
621 dev_err(&port
->dev
, "Parity mode not supported "
625 if ((cflag
& CSTOPB
) != (old_cflag
& CSTOPB
)) {
626 cp2101_get_config(port
, CP2101_BITS
, &bits
, 2);
627 bits
&= ~BITS_STOP_MASK
;
628 if (cflag
& CSTOPB
) {
630 dbg("%s - stop bits = 2", __FUNCTION__
);
633 dbg("%s - stop bits = 1", __FUNCTION__
);
635 if (cp2101_set_config(port
, CP2101_BITS
, &bits
, 2))
636 dev_err(&port
->dev
, "Number of stop bits requested "
637 "not supported by device\n");
640 if ((cflag
& CRTSCTS
) != (old_cflag
& CRTSCTS
)) {
641 cp2101_get_config(port
, CP2101_MODEMCTL
, modem_ctl
, 16);
642 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
643 __FUNCTION__
, modem_ctl
[0], modem_ctl
[1],
644 modem_ctl
[2], modem_ctl
[3]);
646 if (cflag
& CRTSCTS
) {
647 modem_ctl
[0] &= ~0x7B;
648 modem_ctl
[0] |= 0x09;
650 dbg("%s - flow control = CRTSCTS", __FUNCTION__
);
652 modem_ctl
[0] &= ~0x7B;
653 modem_ctl
[0] |= 0x01;
654 modem_ctl
[1] |= 0x40;
655 dbg("%s - flow control = NONE", __FUNCTION__
);
658 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
659 __FUNCTION__
, modem_ctl
[0], modem_ctl
[1],
660 modem_ctl
[2], modem_ctl
[3]);
661 cp2101_set_config(port
, CP2101_MODEMCTL
, modem_ctl
, 16);
666 static int cp2101_tiocmset (struct usb_serial_port
*port
, struct file
*file
,
667 unsigned int set
, unsigned int clear
)
671 dbg("%s - port %d", __FUNCTION__
, port
->number
);
673 if (set
& TIOCM_RTS
) {
674 control
|= CONTROL_RTS
;
675 control
|= CONTROL_WRITE_RTS
;
677 if (set
& TIOCM_DTR
) {
678 control
|= CONTROL_DTR
;
679 control
|= CONTROL_WRITE_DTR
;
681 if (clear
& TIOCM_RTS
) {
682 control
&= ~CONTROL_RTS
;
683 control
|= CONTROL_WRITE_RTS
;
685 if (clear
& TIOCM_DTR
) {
686 control
&= ~CONTROL_DTR
;
687 control
|= CONTROL_WRITE_DTR
;
690 dbg("%s - control = 0x%.4x", __FUNCTION__
, control
);
692 return cp2101_set_config(port
, CP2101_CONTROL
, &control
, 2);
696 static int cp2101_tiocmget (struct usb_serial_port
*port
, struct file
*file
)
700 dbg("%s - port %d", __FUNCTION__
, port
->number
);
702 cp2101_get_config(port
, CP2101_CONTROL
, &control
, 1);
704 result
= ((control
& CONTROL_DTR
) ? TIOCM_DTR
: 0)
705 |((control
& CONTROL_RTS
) ? TIOCM_RTS
: 0)
706 |((control
& CONTROL_CTS
) ? TIOCM_CTS
: 0)
707 |((control
& CONTROL_DSR
) ? TIOCM_DSR
: 0)
708 |((control
& CONTROL_RING
)? TIOCM_RI
: 0)
709 |((control
& CONTROL_DCD
) ? TIOCM_CD
: 0);
711 dbg("%s - control = 0x%.2x", __FUNCTION__
, control
);
716 static void cp2101_break_ctl (struct usb_serial_port
*port
, int break_state
)
720 dbg("%s - port %d", __FUNCTION__
, port
->number
);
721 if (break_state
== 0)
725 dbg("%s - turning break %s", __FUNCTION__
,
726 state
==BREAK_OFF
? "off" : "on");
727 cp2101_set_config(port
, CP2101_BREAK
, &state
, 2);
730 static int cp2101_startup (struct usb_serial
*serial
)
732 /* CP2101 buffers behave strangely unless device is reset */
733 usb_reset_device(serial
->dev
);
737 static void cp2101_shutdown (struct usb_serial
*serial
)
741 dbg("%s", __FUNCTION__
);
743 /* Stop reads and writes on all ports */
744 for (i
=0; i
< serial
->num_ports
; ++i
) {
745 cp2101_cleanup(serial
->port
[i
]);
749 static int __init
cp2101_init (void)
753 retval
= usb_serial_register(&cp2101_device
);
755 return retval
; /* Failed to register */
757 retval
= usb_register(&cp2101_driver
);
759 /* Failed to register */
760 usb_serial_deregister(&cp2101_device
);
765 info(DRIVER_DESC
" " DRIVER_VERSION
);
769 static void __exit
cp2101_exit (void)
771 usb_deregister (&cp2101_driver
);
772 usb_serial_deregister (&cp2101_device
);
775 module_init(cp2101_init
);
776 module_exit(cp2101_exit
);
778 MODULE_DESCRIPTION(DRIVER_DESC
);
779 MODULE_VERSION(DRIVER_VERSION
);
780 MODULE_LICENSE("GPL");
782 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
783 MODULE_PARM_DESC(debug
, "Enable verbose debugging messages");