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K2.6 patches and update.
[tomato.git] / release / src-rt / linux / linux-2.6 / drivers / usb / serial / cp2101.c
blob33f6ee50b8d34b5c0ca5fc83d368d8325d11e235
1 /*
2 * Silicon Laboratories CP2101/CP2102 USB to RS232 serial adaptor driver
3 *
4 * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
5 *
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.
9 *
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
13 *
14 * Outstanding Issues:
15 * Buffers are not flushed when the port is opened.
16 * Multiple calls to write() may fail with "Resource temporarily unavailable"
17 *
18 */
19
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>
30
31 /*
32 * Version Information
33 */
34 #define DRIVER_VERSION "v0.07"
35 #define DRIVER_DESC "Silicon Labs CP2101/CP2102 RS232 serial adaptor driver"
36
37 /*
38 * Function Prototypes
39 */
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*);
51
52
53 static int debug;
54
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 */
80 };
81
82 MODULE_DEVICE_TABLE (usb, id_table);
83
84 static struct usb_driver cp2101_driver = {
85 .name = "cp2101",
86 .probe = usb_serial_probe,
87 .disconnect = usb_serial_disconnect,
88 .id_table = id_table,
89 .no_dynamic_id = 1,
90 };
91
92 static struct usb_serial_driver cp2101_device = {
93 .driver = {
94 .owner = THIS_MODULE,
95 .name = "cp2101",
96 },
97 .usb_driver = &cp2101_driver,
98 .id_table = id_table,
99 .num_interrupt_in = 0,
100 .num_bulk_in = 0,
101 .num_bulk_out = 0,
102 .num_ports = 1,
103 .open = cp2101_open,
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,
111 };
112
113 /* Config request types */
114 #define REQTYPE_HOST_TO_DEVICE 0x41
115 #define REQTYPE_DEVICE_TO_HOST 0xc1
116
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 ??? */
125
126 /* CP2101_UART */
127 #define UART_ENABLE 0x0001
128 #define UART_DISABLE 0x0000
129
130 /* CP2101_BAUDRATE */
131 #define BAUD_RATE_GEN_FREQ 0x384000
132
133 /* CP2101_BITS */
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
140
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
147
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
152
153 /* CP2101_BREAK */
154 #define BREAK_ON 0x0000
155 #define BREAK_OFF 0x0001
156
157 /* CP2101_CONTROL */
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
166
167 /*
168 * cp2101_get_config
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)
173 */
174 static int cp2101_get_config(struct usb_serial_port* port, u8 request,
175 unsigned int *data, int size)
176 {
177 struct usb_serial *serial = port->serial;
178 __le32 *buf;
179 int result, i, length;
180
181 /* Number of integers required to contain the array */
182 length = (((size - 1) | 3) + 1)/4;
183
184 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
185 if (!buf) {
186 dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
187 return -ENOMEM;
188 }
189
190 /* For get requests, the request number must be incremented */
191 request++;
192
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,
196 0, buf, size, 300);
197
198 /* Convert data into an array of integers */
199 for (i=0; i<length; i++)
200 data[i] = le32_to_cpu(buf[i]);
201
202 kfree(buf);
203
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);
208 return -EPROTO;
209 }
210
211 return 0;
212 }
213
214 /*
215 * cp2101_set_config
216 * Writes to the CP2101 configuration registers
217 * Values less than 16 bits wide are sent directly
218 * 'size' is specified in bytes.
219 */
220 static int cp2101_set_config(struct usb_serial_port* port, u8 request,
221 unsigned int *data, int size)
222 {
223 struct usb_serial *serial = port->serial;
224 __le32 *buf;
225 int result, i, length;
226
227 /* Number of integers required to contain the array */
228 length = (((size - 1) | 3) + 1)/4;
229
230 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
231 if (!buf) {
232 dev_err(&port->dev, "%s - out of memory.\n",
233 __FUNCTION__);
234 return -ENOMEM;
235 }
236
237 /* Array of integers into bytes */
238 for (i = 0; i < length; i++)
239 buf[i] = cpu_to_le32(data[i]);
240
241 if (size > 2) {
242 result = usb_control_msg (serial->dev,
243 usb_sndctrlpipe(serial->dev, 0),
244 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
245 0, buf, size, 300);
246 } else {
247 result = usb_control_msg (serial->dev,
248 usb_sndctrlpipe(serial->dev, 0),
249 request, REQTYPE_HOST_TO_DEVICE, data[0],
250 0, NULL, 0, 300);
251 }
252
253 kfree(buf);
254
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);
259 return -EPROTO;
260 }
261
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],
266 0, NULL, 0, 300);
267 return 0;
268 }
269
270 /*
271 * cp2101_set_config_single
272 * Convenience function for calling cp2101_set_config on single data values
273 * without requiring an integer pointer
274 */
275 static inline int cp2101_set_config_single(struct usb_serial_port* port,
276 u8 request, unsigned int data)
277 {
278 return cp2101_set_config(port, request, &data, 2);
279 }
280
281 static int cp2101_open (struct usb_serial_port *port, struct file *filp)
282 {
283 struct usb_serial *serial = port->serial;
284 int result;
285
286 dbg("%s - port %d", __FUNCTION__, port->number);
287
288 if (cp2101_set_config_single(port, CP2101_UART, UART_ENABLE)) {
289 dev_err(&port->dev, "%s - Unable to enable UART\n",
290 __FUNCTION__);
291 return -EPROTO;
292 }
293
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,
301 port);
302 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
303 if (result) {
304 dev_err(&port->dev, "%s - failed resubmitting read urb, "
305 "error %d\n", __FUNCTION__, result);
306 return result;
307 }
308
309 /* Configure the termios structure */
310 cp2101_get_termios(port);
311
312 /* Set the DTR and RTS pins low */
313 cp2101_tiocmset(port, NULL, TIOCM_DTR | TIOCM_RTS, 0);
314
315 return 0;
316 }
317
318 static void cp2101_cleanup (struct usb_serial_port *port)
319 {
320 struct usb_serial *serial = port->serial;
321
322 dbg("%s - port %d", __FUNCTION__, port->number);
323
324 if (serial->dev) {
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);
330 }
331 }
332
333 static void cp2101_close (struct usb_serial_port *port, struct file * filp)
334 {
335 dbg("%s - port %d", __FUNCTION__, port->number);
336
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);
341
342 cp2101_set_config_single(port, CP2101_UART, UART_DISABLE);
343 }
344
345 /*
346 * cp2101_get_termios
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
350 */
351 static void cp2101_get_termios (struct usb_serial_port *port)
352 {
353 unsigned int cflag, modem_ctl[4];
354 int baud;
355 int bits;
356
357 dbg("%s - port %d", __FUNCTION__, port->number);
358
359 if (!port->tty || !port->tty->termios) {
360 dbg("%s - no tty structures", __FUNCTION__);
361 return;
362 }
363 cflag = port->tty->termios->c_cflag;
364
365 cp2101_get_config(port, CP2101_BAUDRATE, &baud, 2);
366 /* Convert to baudrate */
367 if (baud)
368 baud = BAUD_RATE_GEN_FREQ / baud;
369
370 dbg("%s - baud rate = %d", __FUNCTION__, baud);
371 cflag &= ~CBAUD;
372 switch (baud) {
373 /*
374 * The baud rates which are commented out below
375 * appear to be supported by the device
376 * but are non-standard
377 */
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;*/
397 default:
398 dbg("%s - Baud rate is not supported, "
399 "using 9600 baud", __FUNCTION__);
400 cflag |= B9600;
401 cp2101_set_config_single(port, CP2101_BAUDRATE,
402 (BAUD_RATE_GEN_FREQ/9600));
403 break;
404 }
405
406 cp2101_get_config(port, CP2101_BITS, &bits, 2);
407 cflag &= ~CSIZE;
408 switch(bits & BITS_DATA_MASK) {
409 case BITS_DATA_5:
410 dbg("%s - data bits = 5", __FUNCTION__);
411 cflag |= CS5;
412 break;
413 case BITS_DATA_6:
414 dbg("%s - data bits = 6", __FUNCTION__);
415 cflag |= CS6;
416 break;
417 case BITS_DATA_7:
418 dbg("%s - data bits = 7", __FUNCTION__);
419 cflag |= CS7;
420 break;
421 case BITS_DATA_8:
422 dbg("%s - data bits = 8", __FUNCTION__);
423 cflag |= CS8;
424 break;
425 case BITS_DATA_9:
426 dbg("%s - data bits = 9 (not supported, "
427 "using 8 data bits)", __FUNCTION__);
428 cflag |= CS8;
429 bits &= ~BITS_DATA_MASK;
430 bits |= BITS_DATA_8;
431 cp2101_set_config(port, CP2101_BITS, &bits, 2);
432 break;
433 default:
434 dbg("%s - Unknown number of data bits, "
435 "using 8", __FUNCTION__);
436 cflag |= CS8;
437 bits &= ~BITS_DATA_MASK;
438 bits |= BITS_DATA_8;
439 cp2101_set_config(port, CP2101_BITS, &bits, 2);
440 break;
441 }
442
443 switch(bits & BITS_PARITY_MASK) {
444 case BITS_PARITY_NONE:
445 dbg("%s - parity = NONE", __FUNCTION__);
446 cflag &= ~PARENB;
447 break;
448 case BITS_PARITY_ODD:
449 dbg("%s - parity = ODD", __FUNCTION__);
450 cflag |= (PARENB|PARODD);
451 break;
452 case BITS_PARITY_EVEN:
453 dbg("%s - parity = EVEN", __FUNCTION__);
454 cflag &= ~PARODD;
455 cflag |= PARENB;
456 break;
457 case BITS_PARITY_MARK:
458 dbg("%s - parity = MARK (not supported, "
459 "disabling parity)", __FUNCTION__);
460 cflag &= ~PARENB;
461 bits &= ~BITS_PARITY_MASK;
462 cp2101_set_config(port, CP2101_BITS, &bits, 2);
463 break;
464 case BITS_PARITY_SPACE:
465 dbg("%s - parity = SPACE (not supported, "
466 "disabling parity)", __FUNCTION__);
467 cflag &= ~PARENB;
468 bits &= ~BITS_PARITY_MASK;
469 cp2101_set_config(port, CP2101_BITS, &bits, 2);
470 break;
471 default:
472 dbg("%s - Unknown parity mode, "
473 "disabling parity", __FUNCTION__);
474 cflag &= ~PARENB;
475 bits &= ~BITS_PARITY_MASK;
476 cp2101_set_config(port, CP2101_BITS, &bits, 2);
477 break;
478 }
479
480 cflag &= ~CSTOPB;
481 switch(bits & BITS_STOP_MASK) {
482 case BITS_STOP_1:
483 dbg("%s - stop bits = 1", __FUNCTION__);
484 break;
485 case BITS_STOP_1_5:
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);
490 break;
491 case BITS_STOP_2:
492 dbg("%s - stop bits = 2", __FUNCTION__);
493 cflag |= CSTOPB;
494 break;
495 default:
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);
500 break;
501 }
502
503 cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16);
504 if (modem_ctl[0] & 0x0008) {
505 dbg("%s - flow control = CRTSCTS", __FUNCTION__);
506 cflag |= CRTSCTS;
507 } else {
508 dbg("%s - flow control = NONE", __FUNCTION__);
509 cflag &= ~CRTSCTS;
510 }
511
512 port->tty->termios->c_cflag = cflag;
513 }
514
515 static void cp2101_set_termios (struct usb_serial_port *port,
516 struct ktermios *old_termios)
517 {
518 unsigned int cflag, old_cflag=0;
519 int baud=0, bits;
520 unsigned int modem_ctl[4];
521
522 dbg("%s - port %d", __FUNCTION__, port->number);
523
524 if ((!port->tty) || (!port->tty->termios)) {
525 dbg("%s - no tty structures", __FUNCTION__);
526 return;
527 }
528 cflag = port->tty->termios->c_cflag;
529 old_cflag = old_termios->c_cflag;
530 baud = tty_get_baud_rate(port->tty);
531
532 /* If the baud rate is to be updated*/
533 if (baud != tty_termios_baud_rate(old_termios)) {
534 switch (baud) {
535 case 0:
536 case 600:
537 case 1200:
538 case 1800:
539 case 2400:
540 case 4800:
541 case 7200:
542 case 9600:
543 case 14400:
544 case 19200:
545 case 28800:
546 case 38400:
547 case 55854:
548 case 57600:
549 case 115200:
550 case 127117:
551 case 230400:
552 case 460800:
553 case 921600:
554 case 3686400:
555 break;
556 default:
557 baud = 9600;
558 break;
559 }
560
561 if (baud) {
562 dbg("%s - Setting baud rate to %d baud", __FUNCTION__,
563 baud);
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");
568 }
569 }
570
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) {
576 case CS5:
577 bits |= BITS_DATA_5;
578 dbg("%s - data bits = 5", __FUNCTION__);
579 break;
580 case CS6:
581 bits |= BITS_DATA_6;
582 dbg("%s - data bits = 6", __FUNCTION__);
583 break;
584 case CS7:
585 bits |= BITS_DATA_7;
586 dbg("%s - data bits = 7", __FUNCTION__);
587 break;
588 case CS8:
589 bits |= BITS_DATA_8;
590 dbg("%s - data bits = 8", __FUNCTION__);
591 break;
592 /*case CS9:
593 bits |= BITS_DATA_9;
594 dbg("%s - data bits = 9", __FUNCTION__);
595 break;*/
596 default:
597 dev_err(&port->dev, "cp2101 driver does not "
598 "support the number of bits requested,"
599 " using 8 bit mode\n");
600 bits |= BITS_DATA_8;
601 break;
602 }
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");
606 }
607
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__);
615 } else {
616 bits |= BITS_PARITY_EVEN;
617 dbg("%s - parity = EVEN", __FUNCTION__);
618 }
619 }
620 if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
621 dev_err(&port->dev, "Parity mode not supported "
622 "by device\n");
623 }
624
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) {
629 bits |= BITS_STOP_2;
630 dbg("%s - stop bits = 2", __FUNCTION__);
631 } else {
632 bits |= BITS_STOP_1;
633 dbg("%s - stop bits = 1", __FUNCTION__);
634 }
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");
638 }
639
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]);
645
646 if (cflag & CRTSCTS) {
647 modem_ctl[0] &= ~0x7B;
648 modem_ctl[0] |= 0x09;
649 modem_ctl[1] = 0x80;
650 dbg("%s - flow control = CRTSCTS", __FUNCTION__);
651 } else {
652 modem_ctl[0] &= ~0x7B;
653 modem_ctl[0] |= 0x01;
654 modem_ctl[1] |= 0x40;
655 dbg("%s - flow control = NONE", __FUNCTION__);
656 }
657
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);
662 }
663
664 }
665
666 static int cp2101_tiocmset (struct usb_serial_port *port, struct file *file,
667 unsigned int set, unsigned int clear)
668 {
669 int control = 0;
670
671 dbg("%s - port %d", __FUNCTION__, port->number);
672
673 if (set & TIOCM_RTS) {
674 control |= CONTROL_RTS;
675 control |= CONTROL_WRITE_RTS;
676 }
677 if (set & TIOCM_DTR) {
678 control |= CONTROL_DTR;
679 control |= CONTROL_WRITE_DTR;
680 }
681 if (clear & TIOCM_RTS) {
682 control &= ~CONTROL_RTS;
683 control |= CONTROL_WRITE_RTS;
684 }
685 if (clear & TIOCM_DTR) {
686 control &= ~CONTROL_DTR;
687 control |= CONTROL_WRITE_DTR;
688 }
689
690 dbg("%s - control = 0x%.4x", __FUNCTION__, control);
691
692 return cp2101_set_config(port, CP2101_CONTROL, &control, 2);
693
694 }
695
696 static int cp2101_tiocmget (struct usb_serial_port *port, struct file *file)
697 {
698 int control, result;
699
700 dbg("%s - port %d", __FUNCTION__, port->number);
701
702 cp2101_get_config(port, CP2101_CONTROL, &control, 1);
703
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);
710
711 dbg("%s - control = 0x%.2x", __FUNCTION__, control);
712
713 return result;
714 }
715
716 static void cp2101_break_ctl (struct usb_serial_port *port, int break_state)
717 {
718 int state;
719
720 dbg("%s - port %d", __FUNCTION__, port->number);
721 if (break_state == 0)
722 state = BREAK_OFF;
723 else
724 state = BREAK_ON;
725 dbg("%s - turning break %s", __FUNCTION__,
726 state==BREAK_OFF ? "off" : "on");
727 cp2101_set_config(port, CP2101_BREAK, &state, 2);
728 }
729
730 static int cp2101_startup (struct usb_serial *serial)
731 {
732 /* CP2101 buffers behave strangely unless device is reset */
733 usb_reset_device(serial->dev);
734 return 0;
735 }
736
737 static void cp2101_shutdown (struct usb_serial *serial)
738 {
739 int i;
740
741 dbg("%s", __FUNCTION__);
742
743 /* Stop reads and writes on all ports */
744 for (i=0; i < serial->num_ports; ++i) {
745 cp2101_cleanup(serial->port[i]);
746 }
747 }
748
749 static int __init cp2101_init (void)
750 {
751 int retval;
752
753 retval = usb_serial_register(&cp2101_device);
754 if (retval)
755 return retval; /* Failed to register */
756
757 retval = usb_register(&cp2101_driver);
758 if (retval) {
759 /* Failed to register */
760 usb_serial_deregister(&cp2101_device);
761 return retval;
762 }
763
764 /* Success */
765 info(DRIVER_DESC " " DRIVER_VERSION);
766 return 0;
767 }
768
769 static void __exit cp2101_exit (void)
770 {
771 usb_deregister (&cp2101_driver);
772 usb_serial_deregister (&cp2101_device);
773 }
774
775 module_init(cp2101_init);
776 module_exit(cp2101_exit);
777
778 MODULE_DESCRIPTION(DRIVER_DESC);
779 MODULE_VERSION(DRIVER_VERSION);
780 MODULE_LICENSE("GPL");
781
782 module_param(debug, bool, S_IRUGO | S_IWUSR);
783 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");
Tomato firmware and modifications.