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/kernel.h>
21 #include <linux/errno.h>
22 #include <linux/slab.h>
23 #include <linux/tty.h>
24 #include <linux/tty_flip.h>
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/usb.h>
28 #include <asm/uaccess.h>
29 #include <linux/usb/serial.h>
34 #define DRIVER_VERSION "v0.07"
35 #define DRIVER_DESC "Silicon Labs CP2101/CP2102 RS232 serial adaptor driver"
40 static int cp2101_open(struct usb_serial_port
*, struct file
*);
41 static void cp2101_cleanup(struct usb_serial_port
*);
42 static void cp2101_close(struct usb_serial_port
*, struct file
*);
43 static void cp2101_get_termios(struct usb_serial_port
*);
44 static void cp2101_set_termios(struct usb_serial_port
*, struct ktermios
*);
45 static int cp2101_tiocmget (struct usb_serial_port
*, struct file
*);
46 static int cp2101_tiocmset (struct usb_serial_port
*, struct file
*,
47 unsigned int, unsigned int);
48 static void cp2101_break_ctl(struct usb_serial_port
*, int);
49 static int cp2101_startup (struct usb_serial
*);
50 static void cp2101_shutdown(struct usb_serial
*);
55 static struct usb_device_id id_table
[] = {
56 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
57 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
58 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
59 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
60 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
61 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
62 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
63 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
64 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
65 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
66 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
67 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
68 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
69 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
70 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
71 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
72 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
73 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
74 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
75 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
76 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
77 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
78 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
79 { } /* Terminating Entry */
82 MODULE_DEVICE_TABLE (usb
, id_table
);
84 static struct usb_driver cp2101_driver
= {
86 .probe
= usb_serial_probe
,
87 .disconnect
= usb_serial_disconnect
,
92 static struct usb_serial_driver cp2101_device
= {
97 .usb_driver
= &cp2101_driver
,
99 .num_interrupt_in
= 0,
104 .close
= cp2101_close
,
105 .break_ctl
= cp2101_break_ctl
,
106 .set_termios
= cp2101_set_termios
,
107 .tiocmget
= cp2101_tiocmget
,
108 .tiocmset
= cp2101_tiocmset
,
109 .attach
= cp2101_startup
,
110 .shutdown
= cp2101_shutdown
,
113 /* Config request types */
114 #define REQTYPE_HOST_TO_DEVICE 0x41
115 #define REQTYPE_DEVICE_TO_HOST 0xc1
117 /* Config SET requests. To GET, add 1 to the request number */
118 #define CP2101_UART 0x00 /* Enable / Disable */
119 #define CP2101_BAUDRATE 0x01 /* (BAUD_RATE_GEN_FREQ / baudrate) */
120 #define CP2101_BITS 0x03 /* 0x(0)(databits)(parity)(stopbits) */
121 #define CP2101_BREAK 0x05 /* On / Off */
122 #define CP2101_CONTROL 0x07 /* Flow control line states */
123 #define CP2101_MODEMCTL 0x13 /* Modem controls */
124 #define CP2101_CONFIG_6 0x19 /* 6 bytes of config data ??? */
127 #define UART_ENABLE 0x0001
128 #define UART_DISABLE 0x0000
130 /* CP2101_BAUDRATE */
131 #define BAUD_RATE_GEN_FREQ 0x384000
134 #define BITS_DATA_MASK 0X0f00
135 #define BITS_DATA_5 0X0500
136 #define BITS_DATA_6 0X0600
137 #define BITS_DATA_7 0X0700
138 #define BITS_DATA_8 0X0800
139 #define BITS_DATA_9 0X0900
141 #define BITS_PARITY_MASK 0x00f0
142 #define BITS_PARITY_NONE 0x0000
143 #define BITS_PARITY_ODD 0x0010
144 #define BITS_PARITY_EVEN 0x0020
145 #define BITS_PARITY_MARK 0x0030
146 #define BITS_PARITY_SPACE 0x0040
148 #define BITS_STOP_MASK 0x000f
149 #define BITS_STOP_1 0x0000
150 #define BITS_STOP_1_5 0x0001
151 #define BITS_STOP_2 0x0002
154 #define BREAK_ON 0x0000
155 #define BREAK_OFF 0x0001
158 #define CONTROL_DTR 0x0001
159 #define CONTROL_RTS 0x0002
160 #define CONTROL_CTS 0x0010
161 #define CONTROL_DSR 0x0020
162 #define CONTROL_RING 0x0040
163 #define CONTROL_DCD 0x0080
164 #define CONTROL_WRITE_DTR 0x0100
165 #define CONTROL_WRITE_RTS 0x0200
169 * Reads from the CP2101 configuration registers
170 * 'size' is specified in bytes.
171 * 'data' is a pointer to a pre-allocated array of integers large
172 * enough to hold 'size' bytes (with 4 bytes to each integer)
174 static int cp2101_get_config(struct usb_serial_port
* port
, u8 request
,
175 unsigned int *data
, int size
)
177 struct usb_serial
*serial
= port
->serial
;
179 int result
, i
, length
;
181 /* Number of integers required to contain the array */
182 length
= (((size
- 1) | 3) + 1)/4;
184 buf
= kcalloc(length
, sizeof(__le32
), GFP_KERNEL
);
186 dev_err(&port
->dev
, "%s - out of memory.\n", __FUNCTION__
);
190 /* For get requests, the request number must be incremented */
193 /* Issue the request, attempting to read 'size' bytes */
194 result
= usb_control_msg (serial
->dev
,usb_rcvctrlpipe (serial
->dev
, 0),
195 request
, REQTYPE_DEVICE_TO_HOST
, 0x0000,
198 /* Convert data into an array of integers */
199 for (i
=0; i
<length
; i
++)
200 data
[i
] = le32_to_cpu(buf
[i
]);
204 if (result
!= size
) {
205 dev_err(&port
->dev
, "%s - Unable to send config request, "
206 "request=0x%x size=%d result=%d\n",
207 __FUNCTION__
, request
, size
, result
);
216 * Writes to the CP2101 configuration registers
217 * Values less than 16 bits wide are sent directly
218 * 'size' is specified in bytes.
220 static int cp2101_set_config(struct usb_serial_port
* port
, u8 request
,
221 unsigned int *data
, int size
)
223 struct usb_serial
*serial
= port
->serial
;
225 int result
, i
, length
;
227 /* Number of integers required to contain the array */
228 length
= (((size
- 1) | 3) + 1)/4;
230 buf
= kmalloc(length
* sizeof(__le32
), GFP_KERNEL
);
232 dev_err(&port
->dev
, "%s - out of memory.\n",
237 /* Array of integers into bytes */
238 for (i
= 0; i
< length
; i
++)
239 buf
[i
] = cpu_to_le32(data
[i
]);
242 result
= usb_control_msg (serial
->dev
,
243 usb_sndctrlpipe(serial
->dev
, 0),
244 request
, REQTYPE_HOST_TO_DEVICE
, 0x0000,
247 result
= usb_control_msg (serial
->dev
,
248 usb_sndctrlpipe(serial
->dev
, 0),
249 request
, REQTYPE_HOST_TO_DEVICE
, data
[0],
255 if ((size
> 2 && result
!= size
) || result
< 0) {
256 dev_err(&port
->dev
, "%s - Unable to send request, "
257 "request=0x%x size=%d result=%d\n",
258 __FUNCTION__
, request
, size
, result
);
262 /* Single data value */
263 result
= usb_control_msg (serial
->dev
,
264 usb_sndctrlpipe(serial
->dev
, 0),
265 request
, REQTYPE_HOST_TO_DEVICE
, data
[0],
271 * cp2101_set_config_single
272 * Convenience function for calling cp2101_set_config on single data values
273 * without requiring an integer pointer
275 static inline int cp2101_set_config_single(struct usb_serial_port
* port
,
276 u8 request
, unsigned int data
)
278 return cp2101_set_config(port
, request
, &data
, 2);
281 static int cp2101_open (struct usb_serial_port
*port
, struct file
*filp
)
283 struct usb_serial
*serial
= port
->serial
;
286 dbg("%s - port %d", __FUNCTION__
, port
->number
);
288 if (cp2101_set_config_single(port
, CP2101_UART
, UART_ENABLE
)) {
289 dev_err(&port
->dev
, "%s - Unable to enable UART\n",
294 /* Start reading from the device */
295 usb_fill_bulk_urb (port
->read_urb
, serial
->dev
,
296 usb_rcvbulkpipe(serial
->dev
,
297 port
->bulk_in_endpointAddress
),
298 port
->read_urb
->transfer_buffer
,
299 port
->read_urb
->transfer_buffer_length
,
300 serial
->type
->read_bulk_callback
,
302 result
= usb_submit_urb(port
->read_urb
, GFP_KERNEL
);
304 dev_err(&port
->dev
, "%s - failed resubmitting read urb, "
305 "error %d\n", __FUNCTION__
, result
);
309 /* Configure the termios structure */
310 cp2101_get_termios(port
);
312 /* Set the DTR and RTS pins low */
313 cp2101_tiocmset(port
, NULL
, TIOCM_DTR
| TIOCM_RTS
, 0);
318 static void cp2101_cleanup (struct usb_serial_port
*port
)
320 struct usb_serial
*serial
= port
->serial
;
322 dbg("%s - port %d", __FUNCTION__
, port
->number
);
325 /* shutdown any bulk reads that might be going on */
326 if (serial
->num_bulk_out
)
327 usb_kill_urb(port
->write_urb
);
328 if (serial
->num_bulk_in
)
329 usb_kill_urb(port
->read_urb
);
333 static void cp2101_close (struct usb_serial_port
*port
, struct file
* filp
)
335 dbg("%s - port %d", __FUNCTION__
, port
->number
);
337 /* shutdown our urbs */
338 dbg("%s - shutting down urbs", __FUNCTION__
);
339 usb_kill_urb(port
->write_urb
);
340 usb_kill_urb(port
->read_urb
);
342 cp2101_set_config_single(port
, CP2101_UART
, UART_DISABLE
);
347 * Reads the baud rate, data bits, parity, stop bits and flow control mode
348 * from the device, corrects any unsupported values, and configures the
349 * termios structure to reflect the state of the device
351 static void cp2101_get_termios (struct usb_serial_port
*port
)
353 unsigned int cflag
, modem_ctl
[4];
357 dbg("%s - port %d", __FUNCTION__
, port
->number
);
359 if ((!port
->tty
) || (!port
->tty
->termios
)) {
360 dbg("%s - no tty structures", __FUNCTION__
);
363 cflag
= port
->tty
->termios
->c_cflag
;
365 cp2101_get_config(port
, CP2101_BAUDRATE
, &baud
, 2);
366 /* Convert to baudrate */
368 baud
= BAUD_RATE_GEN_FREQ
/ baud
;
370 dbg("%s - baud rate = %d", __FUNCTION__
, baud
);
374 * The baud rates which are commented out below
375 * appear to be supported by the device
376 * but are non-standard
378 case 600: cflag
|= B600
; break;
379 case 1200: cflag
|= B1200
; break;
380 case 1800: cflag
|= B1800
; break;
381 case 2400: cflag
|= B2400
; break;
382 case 4800: cflag
|= B4800
; break;
383 /*case 7200: cflag |= B7200; break;*/
384 case 9600: cflag
|= B9600
; break;
385 /*case 14400: cflag |= B14400; break;*/
386 case 19200: cflag
|= B19200
; break;
387 /*case 28800: cflag |= B28800; break;*/
388 case 38400: cflag
|= B38400
; break;
389 /*case 55854: cflag |= B55054; break;*/
390 case 57600: cflag
|= B57600
; break;
391 case 115200: cflag
|= B115200
; break;
392 /*case 127117: cflag |= B127117; break;*/
393 case 230400: cflag
|= B230400
; break;
394 case 460800: cflag
|= B460800
; break;
395 case 921600: cflag
|= B921600
; break;
396 /*case 3686400: cflag |= B3686400; break;*/
398 dbg("%s - Baud rate is not supported, "
399 "using 9600 baud", __FUNCTION__
);
401 cp2101_set_config_single(port
, CP2101_BAUDRATE
,
402 (BAUD_RATE_GEN_FREQ
/9600));
406 cp2101_get_config(port
, CP2101_BITS
, &bits
, 2);
408 switch(bits
& BITS_DATA_MASK
) {
410 dbg("%s - data bits = 5", __FUNCTION__
);
414 dbg("%s - data bits = 6", __FUNCTION__
);
418 dbg("%s - data bits = 7", __FUNCTION__
);
422 dbg("%s - data bits = 8", __FUNCTION__
);
426 dbg("%s - data bits = 9 (not supported, "
427 "using 8 data bits)", __FUNCTION__
);
429 bits
&= ~BITS_DATA_MASK
;
431 cp2101_set_config(port
, CP2101_BITS
, &bits
, 2);
434 dbg("%s - Unknown number of data bits, "
435 "using 8", __FUNCTION__
);
437 bits
&= ~BITS_DATA_MASK
;
439 cp2101_set_config(port
, CP2101_BITS
, &bits
, 2);
443 switch(bits
& BITS_PARITY_MASK
) {
444 case BITS_PARITY_NONE
:
445 dbg("%s - parity = NONE", __FUNCTION__
);
448 case BITS_PARITY_ODD
:
449 dbg("%s - parity = ODD", __FUNCTION__
);
450 cflag
|= (PARENB
|PARODD
);
452 case BITS_PARITY_EVEN
:
453 dbg("%s - parity = EVEN", __FUNCTION__
);
457 case BITS_PARITY_MARK
:
458 dbg("%s - parity = MARK (not supported, "
459 "disabling parity)", __FUNCTION__
);
461 bits
&= ~BITS_PARITY_MASK
;
462 cp2101_set_config(port
, CP2101_BITS
, &bits
, 2);
464 case BITS_PARITY_SPACE
:
465 dbg("%s - parity = SPACE (not supported, "
466 "disabling parity)", __FUNCTION__
);
468 bits
&= ~BITS_PARITY_MASK
;
469 cp2101_set_config(port
, CP2101_BITS
, &bits
, 2);
472 dbg("%s - Unknown parity mode, "
473 "disabling parity", __FUNCTION__
);
475 bits
&= ~BITS_PARITY_MASK
;
476 cp2101_set_config(port
, CP2101_BITS
, &bits
, 2);
481 switch(bits
& BITS_STOP_MASK
) {
483 dbg("%s - stop bits = 1", __FUNCTION__
);
486 dbg("%s - stop bits = 1.5 (not supported, "
487 "using 1 stop bit)", __FUNCTION__
);
488 bits
&= ~BITS_STOP_MASK
;
489 cp2101_set_config(port
, CP2101_BITS
, &bits
, 2);
492 dbg("%s - stop bits = 2", __FUNCTION__
);
496 dbg("%s - Unknown number of stop bits, "
497 "using 1 stop bit", __FUNCTION__
);
498 bits
&= ~BITS_STOP_MASK
;
499 cp2101_set_config(port
, CP2101_BITS
, &bits
, 2);
503 cp2101_get_config(port
, CP2101_MODEMCTL
, modem_ctl
, 16);
504 if (modem_ctl
[0] & 0x0008) {
505 dbg("%s - flow control = CRTSCTS", __FUNCTION__
);
508 dbg("%s - flow control = NONE", __FUNCTION__
);
512 port
->tty
->termios
->c_cflag
= cflag
;
515 static void cp2101_set_termios (struct usb_serial_port
*port
,
516 struct ktermios
*old_termios
)
518 unsigned int cflag
, old_cflag
=0;
520 unsigned int modem_ctl
[4];
522 dbg("%s - port %d", __FUNCTION__
, port
->number
);
524 if ((!port
->tty
) || (!port
->tty
->termios
)) {
525 dbg("%s - no tty structures", __FUNCTION__
);
528 cflag
= port
->tty
->termios
->c_cflag
;
530 /* Check that they really want us to change something */
532 if ((cflag
== old_termios
->c_cflag
) &&
533 (RELEVANT_IFLAG(port
->tty
->termios
->c_iflag
)
534 == RELEVANT_IFLAG(old_termios
->c_iflag
))) {
535 dbg("%s - nothing to change...", __FUNCTION__
);
539 old_cflag
= old_termios
->c_cflag
;
542 /* If the baud rate is to be updated*/
543 if ((cflag
& CBAUD
) != (old_cflag
& CBAUD
)) {
544 switch (cflag
& CBAUD
) {
546 * The baud rates which are commented out below
547 * appear to be supported by the device
548 * but are non-standard
550 case B0
: baud
= 0; break;
551 case B600
: baud
= 600; break;
552 case B1200
: baud
= 1200; break;
553 case B1800
: baud
= 1800; break;
554 case B2400
: baud
= 2400; break;
555 case B4800
: baud
= 4800; break;
556 /*case B7200: baud = 7200; break;*/
557 case B9600
: baud
= 9600; break;
558 /*ase B14400: baud = 14400; break;*/
559 case B19200
: baud
= 19200; break;
560 /*case B28800: baud = 28800; break;*/
561 case B38400
: baud
= 38400; break;
562 /*case B55854: baud = 55054; break;*/
563 case B57600
: baud
= 57600; break;
564 case B115200
: baud
= 115200; break;
565 /*case B127117: baud = 127117; break;*/
566 case B230400
: baud
= 230400; break;
567 case B460800
: baud
= 460800; break;
568 case B921600
: baud
= 921600; break;
569 /*case B3686400: baud = 3686400; break;*/
571 dev_err(&port
->dev
, "cp2101 driver does not "
572 "support the baudrate requested\n");
577 dbg("%s - Setting baud rate to %d baud", __FUNCTION__
,
579 if (cp2101_set_config_single(port
, CP2101_BAUDRATE
,
580 (BAUD_RATE_GEN_FREQ
/ baud
)))
581 dev_err(&port
->dev
, "Baud rate requested not "
582 "supported by device\n");
586 /* If the number of data bits is to be updated */
587 if ((cflag
& CSIZE
) != (old_cflag
& CSIZE
)) {
588 cp2101_get_config(port
, CP2101_BITS
, &bits
, 2);
589 bits
&= ~BITS_DATA_MASK
;
590 switch (cflag
& CSIZE
) {
593 dbg("%s - data bits = 5", __FUNCTION__
);
597 dbg("%s - data bits = 6", __FUNCTION__
);
601 dbg("%s - data bits = 7", __FUNCTION__
);
605 dbg("%s - data bits = 8", __FUNCTION__
);
609 dbg("%s - data bits = 9", __FUNCTION__);
612 dev_err(&port
->dev
, "cp2101 driver does not "
613 "support the number of bits requested,"
614 " using 8 bit mode\n");
618 if (cp2101_set_config(port
, CP2101_BITS
, &bits
, 2))
619 dev_err(&port
->dev
, "Number of data bits requested "
620 "not supported by device\n");
623 if ((cflag
& (PARENB
|PARODD
)) != (old_cflag
& (PARENB
|PARODD
))) {
624 cp2101_get_config(port
, CP2101_BITS
, &bits
, 2);
625 bits
&= ~BITS_PARITY_MASK
;
626 if (cflag
& PARENB
) {
627 if (cflag
& PARODD
) {
628 bits
|= BITS_PARITY_ODD
;
629 dbg("%s - parity = ODD", __FUNCTION__
);
631 bits
|= BITS_PARITY_EVEN
;
632 dbg("%s - parity = EVEN", __FUNCTION__
);
635 if (cp2101_set_config(port
, CP2101_BITS
, &bits
, 2))
636 dev_err(&port
->dev
, "Parity mode not supported "
640 if ((cflag
& CSTOPB
) != (old_cflag
& CSTOPB
)) {
641 cp2101_get_config(port
, CP2101_BITS
, &bits
, 2);
642 bits
&= ~BITS_STOP_MASK
;
643 if (cflag
& CSTOPB
) {
645 dbg("%s - stop bits = 2", __FUNCTION__
);
648 dbg("%s - stop bits = 1", __FUNCTION__
);
650 if (cp2101_set_config(port
, CP2101_BITS
, &bits
, 2))
651 dev_err(&port
->dev
, "Number of stop bits requested "
652 "not supported by device\n");
655 if ((cflag
& CRTSCTS
) != (old_cflag
& CRTSCTS
)) {
656 cp2101_get_config(port
, CP2101_MODEMCTL
, modem_ctl
, 16);
657 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
658 __FUNCTION__
, modem_ctl
[0], modem_ctl
[1],
659 modem_ctl
[2], modem_ctl
[3]);
661 if (cflag
& CRTSCTS
) {
662 modem_ctl
[0] &= ~0x7B;
663 modem_ctl
[0] |= 0x09;
665 dbg("%s - flow control = CRTSCTS", __FUNCTION__
);
667 modem_ctl
[0] &= ~0x7B;
668 modem_ctl
[0] |= 0x01;
669 modem_ctl
[1] |= 0x40;
670 dbg("%s - flow control = NONE", __FUNCTION__
);
673 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
674 __FUNCTION__
, modem_ctl
[0], modem_ctl
[1],
675 modem_ctl
[2], modem_ctl
[3]);
676 cp2101_set_config(port
, CP2101_MODEMCTL
, modem_ctl
, 16);
681 static int cp2101_tiocmset (struct usb_serial_port
*port
, struct file
*file
,
682 unsigned int set
, unsigned int clear
)
686 dbg("%s - port %d", __FUNCTION__
, port
->number
);
688 if (set
& TIOCM_RTS
) {
689 control
|= CONTROL_RTS
;
690 control
|= CONTROL_WRITE_RTS
;
692 if (set
& TIOCM_DTR
) {
693 control
|= CONTROL_DTR
;
694 control
|= CONTROL_WRITE_DTR
;
696 if (clear
& TIOCM_RTS
) {
697 control
&= ~CONTROL_RTS
;
698 control
|= CONTROL_WRITE_RTS
;
700 if (clear
& TIOCM_DTR
) {
701 control
&= ~CONTROL_DTR
;
702 control
|= CONTROL_WRITE_DTR
;
705 dbg("%s - control = 0x%.4x", __FUNCTION__
, control
);
707 return cp2101_set_config(port
, CP2101_CONTROL
, &control
, 2);
711 static int cp2101_tiocmget (struct usb_serial_port
*port
, struct file
*file
)
715 dbg("%s - port %d", __FUNCTION__
, port
->number
);
717 cp2101_get_config(port
, CP2101_CONTROL
, &control
, 1);
719 result
= ((control
& CONTROL_DTR
) ? TIOCM_DTR
: 0)
720 |((control
& CONTROL_RTS
) ? TIOCM_RTS
: 0)
721 |((control
& CONTROL_CTS
) ? TIOCM_CTS
: 0)
722 |((control
& CONTROL_DSR
) ? TIOCM_DSR
: 0)
723 |((control
& CONTROL_RING
)? TIOCM_RI
: 0)
724 |((control
& CONTROL_DCD
) ? TIOCM_CD
: 0);
726 dbg("%s - control = 0x%.2x", __FUNCTION__
, control
);
731 static void cp2101_break_ctl (struct usb_serial_port
*port
, int break_state
)
735 dbg("%s - port %d", __FUNCTION__
, port
->number
);
736 if (break_state
== 0)
740 dbg("%s - turning break %s", __FUNCTION__
,
741 state
==BREAK_OFF
? "off" : "on");
742 cp2101_set_config(port
, CP2101_BREAK
, &state
, 2);
745 static int cp2101_startup (struct usb_serial
*serial
)
747 /* CP2101 buffers behave strangely unless device is reset */
748 usb_reset_device(serial
->dev
);
752 static void cp2101_shutdown (struct usb_serial
*serial
)
756 dbg("%s", __FUNCTION__
);
758 /* Stop reads and writes on all ports */
759 for (i
=0; i
< serial
->num_ports
; ++i
) {
760 cp2101_cleanup(serial
->port
[i
]);
764 static int __init
cp2101_init (void)
768 retval
= usb_serial_register(&cp2101_device
);
770 return retval
; /* Failed to register */
772 retval
= usb_register(&cp2101_driver
);
774 /* Failed to register */
775 usb_serial_deregister(&cp2101_device
);
780 info(DRIVER_DESC
" " DRIVER_VERSION
);
784 static void __exit
cp2101_exit (void)
786 usb_deregister (&cp2101_driver
);
787 usb_serial_deregister (&cp2101_device
);
790 module_init(cp2101_init
);
791 module_exit(cp2101_exit
);
793 MODULE_DESCRIPTION(DRIVER_DESC
);
794 MODULE_VERSION(DRIVER_VERSION
);
795 MODULE_LICENSE("GPL");
797 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
798 MODULE_PARM_DESC(debug
, "Enable verbose debugging messages");