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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux...
[deliverable/linux.git] / drivers / usb / serial / cp2101.c
CommitLineData
1da177e4
LT		 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 *
39a66b8d
CS		 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 *
1da177e4
LT		 18 */
19
1da177e4
LT		 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>
a969888c 29#include <linux/usb/serial.h>
1da177e4
LT		 30
31/*
32 * Version Information
33 */
59224f53 34#define DRIVER_VERSION "v0.07"
1da177e4
LT		 35#define DRIVER_DESC "Silicon Labs CP2101/CP2102 RS232 serial adaptor driver"
36
37/*
38 * Function Prototypes
39 */
40static int cp2101_open(struct usb_serial_port*, struct file*);
41static void cp2101_cleanup(struct usb_serial_port*);
42static void cp2101_close(struct usb_serial_port*, struct file*);
43static void cp2101_get_termios(struct usb_serial_port*);
606d099c 44static void cp2101_set_termios(struct usb_serial_port*, struct ktermios*);
39a66b8d
CS		 45static int cp2101_tiocmget (struct usb_serial_port *, struct file *);
46static int cp2101_tiocmset (struct usb_serial_port *, struct file *,
47 unsigned int, unsigned int);
1da177e4
LT		 48static void cp2101_break_ctl(struct usb_serial_port*, int);
49static int cp2101_startup (struct usb_serial *);
50static void cp2101_shutdown(struct usb_serial*);
51
52
53static int debug;
54
55static struct usb_device_id id_table [] = {
1f4f714f 56 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
198b9517 57 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
014840ec 58 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
198b9517 59 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
e988fc8a
CS		 60 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
61 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
5de8b3ac 62 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
59224f53 63 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
92f5cae2 64 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
212a4b4e 65 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
e988fc8a
CS		 66 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
67 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
92f5cae2 68 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
e988fc8a
CS		 69 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
70 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
fc4bd64c
JH		 71 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
72 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
e988fc8a 73 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
78001e3d
BS		 74 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
75 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
8be27c2d 76 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
78001e3d 77 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
e8898681 78 { USB_DEVICE(0x10c4, 0x8293) }, /* Telegesys ETRX2USB */
e988fc8a 79 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
61926b97 80 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
5de8b3ac
CS		 81 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
82 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
83 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
84 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
ebaf494e 85 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
e05998d5 86 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
5de8b3ac 87 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
b0ce84d5 88 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
39a66b8d 89 { } /* Terminating Entry */
1da177e4
LT		 90};
91
92MODULE_DEVICE_TABLE (usb, id_table);
93
94static struct usb_driver cp2101_driver = {
269bda1c 95 .name = "cp2101",
1da177e4
LT		 96 .probe = usb_serial_probe,
97 .disconnect = usb_serial_disconnect,
98 .id_table = id_table,
ba9dc657 99 .no_dynamic_id = 1,
1da177e4
LT		 100};
101
ea65370d 102static struct usb_serial_driver cp2101_device = {
18fcac35
GKH		 103 .driver = {
104 .owner = THIS_MODULE,
269bda1c 105 .name = "cp2101",
18fcac35 106 },
d9b1b787 107 .usb_driver = &cp2101_driver,
1da177e4
LT		 108 .id_table = id_table,
109 .num_interrupt_in = 0,
8be27c2d
JL		 110 .num_bulk_in = NUM_DONT_CARE,
111 .num_bulk_out = NUM_DONT_CARE,
1da177e4
LT		 112 .num_ports = 1,
113 .open = cp2101_open,
114 .close = cp2101_close,
115 .break_ctl = cp2101_break_ctl,
116 .set_termios = cp2101_set_termios,
39a66b8d
CS		 117 .tiocmget = cp2101_tiocmget,
118 .tiocmset = cp2101_tiocmset,
1da177e4
LT		 119 .attach = cp2101_startup,
120 .shutdown = cp2101_shutdown,
121};
122
39a66b8d 123/* Config request types */
1da177e4
LT		 124#define REQTYPE_HOST_TO_DEVICE 0x41
125#define REQTYPE_DEVICE_TO_HOST 0xc1
126
39a66b8d
CS		 127/* Config SET requests. To GET, add 1 to the request number */
128#define CP2101_UART 0x00 /* Enable / Disable */
129#define CP2101_BAUDRATE 0x01 /* (BAUD_RATE_GEN_FREQ / baudrate) */
130#define CP2101_BITS 0x03 /* 0x(0)(databits)(parity)(stopbits) */
131#define CP2101_BREAK 0x05 /* On / Off */
132#define CP2101_CONTROL 0x07 /* Flow control line states */
133#define CP2101_MODEMCTL 0x13 /* Modem controls */
134#define CP2101_CONFIG_6 0x19 /* 6 bytes of config data ??? */
1da177e4 135
39a66b8d 136/* CP2101_UART */
1da177e4
LT		 137#define UART_ENABLE 0x0001
138#define UART_DISABLE 0x0000
139
39a66b8d 140/* CP2101_BAUDRATE */
1da177e4
LT		 141#define BAUD_RATE_GEN_FREQ 0x384000
142
39a66b8d 143/* CP2101_BITS */
1da177e4 144#define BITS_DATA_MASK 0X0f00
39a66b8d 145#define BITS_DATA_5 0X0500
1da177e4
LT		 146#define BITS_DATA_6 0X0600
147#define BITS_DATA_7 0X0700
148#define BITS_DATA_8 0X0800
149#define BITS_DATA_9 0X0900
150
151#define BITS_PARITY_MASK 0x00f0
152#define BITS_PARITY_NONE 0x0000
153#define BITS_PARITY_ODD 0x0010
154#define BITS_PARITY_EVEN 0x0020
155#define BITS_PARITY_MARK 0x0030
156#define BITS_PARITY_SPACE 0x0040
157
158#define BITS_STOP_MASK 0x000f
159#define BITS_STOP_1 0x0000
160#define BITS_STOP_1_5 0x0001
161#define BITS_STOP_2 0x0002
39a66b8d
CS		 162
163/* CP2101_BREAK */
1da177e4
LT		 164#define BREAK_ON 0x0000
165#define BREAK_OFF 0x0001
166
39a66b8d
CS		 167/* CP2101_CONTROL */
168#define CONTROL_DTR 0x0001
169#define CONTROL_RTS 0x0002
170#define CONTROL_CTS 0x0010
171#define CONTROL_DSR 0x0020
172#define CONTROL_RING 0x0040
173#define CONTROL_DCD 0x0080
174#define CONTROL_WRITE_DTR 0x0100
175#define CONTROL_WRITE_RTS 0x0200
1da177e4 176
39a66b8d
CS		 177/*
178 * cp2101_get_config
179 * Reads from the CP2101 configuration registers
180 * 'size' is specified in bytes.
181 * 'data' is a pointer to a pre-allocated array of integers large
182 * enough to hold 'size' bytes (with 4 bytes to each integer)
183 */
184static int cp2101_get_config(struct usb_serial_port* port, u8 request,
185 unsigned int *data, int size)
1da177e4
LT		 186{
187 struct usb_serial *serial = port->serial;
53ebb3b8 188 __le32 *buf;
39a66b8d
CS		 189 int result, i, length;
190
191 /* Number of integers required to contain the array */
192 length = (((size - 1) | 3) + 1)/4;
193
53ebb3b8 194 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
39a66b8d
CS		 195 if (!buf) {
196 dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
197 return -ENOMEM;
198 }
1da177e4 199
39a66b8d 200 /* For get requests, the request number must be incremented */
1da177e4
LT		 201 request++;
202
39a66b8d 203 /* Issue the request, attempting to read 'size' bytes */
1da177e4
LT		 204 result = usb_control_msg (serial->dev,usb_rcvctrlpipe (serial->dev, 0),
205 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
39a66b8d 206 0, buf, size, 300);
1da177e4 207
39a66b8d
CS		 208 /* Convert data into an array of integers */
209 for (i=0; i<length; i++)
210 data[i] = le32_to_cpu(buf[i]);
1da177e4 211
39a66b8d 212 kfree(buf);
1da177e4 213
39a66b8d
CS		 214 if (result != size) {
215 dev_err(&port->dev, "%s - Unable to send config request, "
216 "request=0x%x size=%d result=%d\n",
217 __FUNCTION__, request, size, result);
218 return -EPROTO;
219 }
1da177e4 220
39a66b8d 221 return 0;
1da177e4
LT		 222}
223
39a66b8d
CS		 224/*
225 * cp2101_set_config
226 * Writes to the CP2101 configuration registers
227 * Values less than 16 bits wide are sent directly
228 * 'size' is specified in bytes.
229 */
230static int cp2101_set_config(struct usb_serial_port* port, u8 request,
231 unsigned int *data, int size)
1da177e4
LT		 232{
233 struct usb_serial *serial = port->serial;
53ebb3b8 234 __le32 *buf;
39a66b8d 235 int result, i, length;
1da177e4 236
39a66b8d
CS		 237 /* Number of integers required to contain the array */
238 length = (((size - 1) | 3) + 1)/4;
239
53ebb3b8 240 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
39a66b8d
CS		 241 if (!buf) {
242 dev_err(&port->dev, "%s - out of memory.\n",
243 __FUNCTION__);
244 return -ENOMEM;
245 }
246
247 /* Array of integers into bytes */
248 for (i = 0; i < length; i++)
249 buf[i] = cpu_to_le32(data[i]);
250
251 if (size > 2) {
252 result = usb_control_msg (serial->dev,
253 usb_sndctrlpipe(serial->dev, 0),
254 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
255 0, buf, size, 300);
256 } else {
257 result = usb_control_msg (serial->dev,
258 usb_sndctrlpipe(serial->dev, 0),
259 request, REQTYPE_HOST_TO_DEVICE, data[0],
260 0, NULL, 0, 300);
1da177e4
LT		 261 }
262
39a66b8d
CS		 263 kfree(buf);
264
265 if ((size > 2 && result != size) || result < 0) {
266 dev_err(&port->dev, "%s - Unable to send request, "
267 "request=0x%x size=%d result=%d\n",
268 __FUNCTION__, request, size, result);
269 return -EPROTO;
270 }
1da177e4 271
39a66b8d
CS		 272 /* Single data value */
273 result = usb_control_msg (serial->dev,
274 usb_sndctrlpipe(serial->dev, 0),
275 request, REQTYPE_HOST_TO_DEVICE, data[0],
276 0, NULL, 0, 300);
1da177e4
LT		 277 return 0;
278}
279
39a66b8d
CS		 280/*
281 * cp2101_set_config_single
282 * Convenience function for calling cp2101_set_config on single data values
283 * without requiring an integer pointer
284 */
285static inline int cp2101_set_config_single(struct usb_serial_port* port,
286 u8 request, unsigned int data)
287{
288 return cp2101_set_config(port, request, &data, 2);
289}
290
1da177e4
LT		 291static int cp2101_open (struct usb_serial_port *port, struct file *filp)
292{
293 struct usb_serial *serial = port->serial;
294 int result;
295
296 dbg("%s - port %d", __FUNCTION__, port->number);
297
39a66b8d 298 if (cp2101_set_config_single(port, CP2101_UART, UART_ENABLE)) {
1da177e4
LT		 299 dev_err(&port->dev, "%s - Unable to enable UART\n",
300 __FUNCTION__);
301 return -EPROTO;
302 }
303
304 /* Start reading from the device */
305 usb_fill_bulk_urb (port->read_urb, serial->dev,
306 usb_rcvbulkpipe(serial->dev,
307 port->bulk_in_endpointAddress),
308 port->read_urb->transfer_buffer,
309 port->read_urb->transfer_buffer_length,
310 serial->type->read_bulk_callback,
311 port);
312 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
313 if (result) {
314 dev_err(&port->dev, "%s - failed resubmitting read urb, "
315 "error %d\n", __FUNCTION__, result);
316 return result;
317 }
318
39a66b8d 319 /* Configure the termios structure */
1da177e4
LT		 320 cp2101_get_termios(port);
321
39a66b8d
CS		 322 /* Set the DTR and RTS pins low */
323 cp2101_tiocmset(port, NULL, TIOCM_DTR | TIOCM_RTS, 0);
324
1da177e4
LT		 325 return 0;
326}
327
328static void cp2101_cleanup (struct usb_serial_port *port)
329{
330 struct usb_serial *serial = port->serial;
331
332 dbg("%s - port %d", __FUNCTION__, port->number);
333
334 if (serial->dev) {
335 /* shutdown any bulk reads that might be going on */
336 if (serial->num_bulk_out)
337 usb_kill_urb(port->write_urb);
338 if (serial->num_bulk_in)
339 usb_kill_urb(port->read_urb);
340 }
341}
342
343static void cp2101_close (struct usb_serial_port *port, struct file * filp)
344{
345 dbg("%s - port %d", __FUNCTION__, port->number);
346
347 /* shutdown our urbs */
348 dbg("%s - shutting down urbs", __FUNCTION__);
349 usb_kill_urb(port->write_urb);
350 usb_kill_urb(port->read_urb);
351
95bef012
ON		 352 mutex_lock(&port->serial->disc_mutex);
353 if (!port->serial->disconnected)
354 cp2101_set_config_single(port, CP2101_UART, UART_DISABLE);
355 mutex_unlock(&port->serial->disc_mutex);
1da177e4
LT		 356}
357
39a66b8d
CS		 358/*
359 * cp2101_get_termios
360 * Reads the baud rate, data bits, parity, stop bits and flow control mode
361 * from the device, corrects any unsupported values, and configures the
362 * termios structure to reflect the state of the device
363 */
1da177e4
LT		 364static void cp2101_get_termios (struct usb_serial_port *port)
365{
39a66b8d 366 unsigned int cflag, modem_ctl[4];
1da177e4
LT		 367 int baud;
368 int bits;
369
370 dbg("%s - port %d", __FUNCTION__, port->number);
371
01e96d28 372 if (!port->tty || !port->tty->termios) {
1da177e4
LT		 373 dbg("%s - no tty structures", __FUNCTION__);
374 return;
375 }
1da177e4 376
39a66b8d
CS		 377 cp2101_get_config(port, CP2101_BAUDRATE, &baud, 2);
378 /* Convert to baudrate */
1da177e4
LT		 379 if (baud)
380 baud = BAUD_RATE_GEN_FREQ / baud;
381
382 dbg("%s - baud rate = %d", __FUNCTION__, baud);
9ab0f202
AC		 383
384 tty_encode_baud_rate(port->tty, baud, baud);
385 cflag = port->tty->termios->c_cflag;
1da177e4 386
39a66b8d 387 cp2101_get_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 388 cflag &= ~CSIZE;
389 switch(bits & BITS_DATA_MASK) {
39a66b8d
CS		 390 case BITS_DATA_5:
391 dbg("%s - data bits = 5", __FUNCTION__);
392 cflag |= CS5;
393 break;
1da177e4
LT		 394 case BITS_DATA_6:
395 dbg("%s - data bits = 6", __FUNCTION__);
396 cflag |= CS6;
397 break;
398 case BITS_DATA_7:
399 dbg("%s - data bits = 7", __FUNCTION__);
400 cflag |= CS7;
401 break;
402 case BITS_DATA_8:
403 dbg("%s - data bits = 8", __FUNCTION__);
404 cflag |= CS8;
405 break;
406 case BITS_DATA_9:
407 dbg("%s - data bits = 9 (not supported, "
408 "using 8 data bits)", __FUNCTION__);
409 cflag |= CS8;
410 bits &= ~BITS_DATA_MASK;
411 bits |= BITS_DATA_8;
39a66b8d 412 cp2101_set_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 413 break;
414 default:
415 dbg("%s - Unknown number of data bits, "
416 "using 8", __FUNCTION__);
417 cflag |= CS8;
418 bits &= ~BITS_DATA_MASK;
419 bits |= BITS_DATA_8;
39a66b8d 420 cp2101_set_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 421 break;
422 }
423
424 switch(bits & BITS_PARITY_MASK) {
425 case BITS_PARITY_NONE:
426 dbg("%s - parity = NONE", __FUNCTION__);
427 cflag &= ~PARENB;
428 break;
429 case BITS_PARITY_ODD:
430 dbg("%s - parity = ODD", __FUNCTION__);
431 cflag |= (PARENB|PARODD);
432 break;
433 case BITS_PARITY_EVEN:
434 dbg("%s - parity = EVEN", __FUNCTION__);
435 cflag &= ~PARODD;
436 cflag |= PARENB;
437 break;
438 case BITS_PARITY_MARK:
439 dbg("%s - parity = MARK (not supported, "
440 "disabling parity)", __FUNCTION__);
441 cflag &= ~PARENB;
442 bits &= ~BITS_PARITY_MASK;
39a66b8d 443 cp2101_set_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 444 break;
445 case BITS_PARITY_SPACE:
446 dbg("%s - parity = SPACE (not supported, "
447 "disabling parity)", __FUNCTION__);
448 cflag &= ~PARENB;
449 bits &= ~BITS_PARITY_MASK;
39a66b8d 450 cp2101_set_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 451 break;
452 default:
453 dbg("%s - Unknown parity mode, "
454 "disabling parity", __FUNCTION__);
455 cflag &= ~PARENB;
456 bits &= ~BITS_PARITY_MASK;
39a66b8d 457 cp2101_set_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 458 break;
459 }
460
461 cflag &= ~CSTOPB;
462 switch(bits & BITS_STOP_MASK) {
463 case BITS_STOP_1:
464 dbg("%s - stop bits = 1", __FUNCTION__);
465 break;
466 case BITS_STOP_1_5:
467 dbg("%s - stop bits = 1.5 (not supported, "
39a66b8d 468 "using 1 stop bit)", __FUNCTION__);
1da177e4 469 bits &= ~BITS_STOP_MASK;
39a66b8d 470 cp2101_set_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 471 break;
472 case BITS_STOP_2:
473 dbg("%s - stop bits = 2", __FUNCTION__);
474 cflag |= CSTOPB;
475 break;
476 default:
477 dbg("%s - Unknown number of stop bits, "
478 "using 1 stop bit", __FUNCTION__);
479 bits &= ~BITS_STOP_MASK;
39a66b8d 480 cp2101_set_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 481 break;
482 }
483
39a66b8d
CS		 484 cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16);
485 if (modem_ctl[0] & 0x0008) {
486 dbg("%s - flow control = CRTSCTS", __FUNCTION__);
487 cflag |= CRTSCTS;
488 } else {
489 dbg("%s - flow control = NONE", __FUNCTION__);
490 cflag &= ~CRTSCTS;
491 }
492
1da177e4
LT		 493 port->tty->termios->c_cflag = cflag;
494}
495
496static void cp2101_set_termios (struct usb_serial_port *port,
606d099c 497 struct ktermios *old_termios)
1da177e4 498{
9ab0f202 499 unsigned int cflag, old_cflag;
39a66b8d
CS		 500 int baud=0, bits;
501 unsigned int modem_ctl[4];
1da177e4
LT		 502
503 dbg("%s - port %d", __FUNCTION__, port->number);
504
c4e41562 505 if (!port->tty || !port->tty->termios) {
1da177e4
LT		 506 dbg("%s - no tty structures", __FUNCTION__);
507 return;
508 }
9ab0f202
AC		 509 port->tty->termios->c_cflag &= ~CMSPAR;
510
1da177e4 511 cflag = port->tty->termios->c_cflag;
01e96d28
AC		 512 old_cflag = old_termios->c_cflag;
513 baud = tty_get_baud_rate(port->tty);
1da177e4
LT		 514
515 /* If the baud rate is to be updated*/
01e96d28
AC		 516 if (baud != tty_termios_baud_rate(old_termios)) {
517 switch (baud) {
518 case 0:
519 case 600:
520 case 1200:
521 case 1800:
522 case 2400:
523 case 4800:
524 case 7200:
525 case 9600:
526 case 14400:
527 case 19200:
528 case 28800:
529 case 38400:
530 case 55854:
531 case 57600:
532 case 115200:
533 case 127117:
534 case 230400:
535 case 460800:
536 case 921600:
537 case 3686400:
538 break;
1da177e4 539 default:
01e96d28 540 baud = 9600;
1da177e4
LT		 541 break;
542 }
543
544 if (baud) {
545 dbg("%s - Setting baud rate to %d baud", __FUNCTION__,
546 baud);
39a66b8d 547 if (cp2101_set_config_single(port, CP2101_BAUDRATE,
9ab0f202 548 (BAUD_RATE_GEN_FREQ / baud))) {
1da177e4
LT		 549 dev_err(&port->dev, "Baud rate requested not "
550 "supported by device\n");
9ab0f202
AC		 551 baud = tty_termios_baud_rate(old_termios);
552 }
1da177e4
LT		 553 }
554 }
9ab0f202
AC		 555 /* Report back the resulting baud rate */
556 tty_encode_baud_rate(port->tty, baud, baud);
1da177e4 557
39a66b8d 558 /* If the number of data bits is to be updated */
1da177e4 559 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
39a66b8d 560 cp2101_get_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 561 bits &= ~BITS_DATA_MASK;
562 switch (cflag & CSIZE) {
39a66b8d
CS		 563 case CS5:
564 bits |= BITS_DATA_5;
565 dbg("%s - data bits = 5", __FUNCTION__);
566 break;
1da177e4
LT		 567 case CS6:
568 bits |= BITS_DATA_6;
569 dbg("%s - data bits = 6", __FUNCTION__);
570 break;
571 case CS7:
572 bits |= BITS_DATA_7;
573 dbg("%s - data bits = 7", __FUNCTION__);
574 break;
575 case CS8:
576 bits |= BITS_DATA_8;
577 dbg("%s - data bits = 8", __FUNCTION__);
578 break;
579 /*case CS9:
580 bits |= BITS_DATA_9;
581 dbg("%s - data bits = 9", __FUNCTION__);
582 break;*/
583 default:
584 dev_err(&port->dev, "cp2101 driver does not "
585 "support the number of bits requested,"
586 " using 8 bit mode\n");
587 bits |= BITS_DATA_8;
588 break;
589 }
39a66b8d 590 if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
1da177e4
LT		 591 dev_err(&port->dev, "Number of data bits requested "
592 "not supported by device\n");
593 }
594
595 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
39a66b8d 596 cp2101_get_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 597 bits &= ~BITS_PARITY_MASK;
598 if (cflag & PARENB) {
599 if (cflag & PARODD) {
600 bits |= BITS_PARITY_ODD;
601 dbg("%s - parity = ODD", __FUNCTION__);
602 } else {
603 bits |= BITS_PARITY_EVEN;
604 dbg("%s - parity = EVEN", __FUNCTION__);
605 }
606 }
39a66b8d 607 if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
1da177e4
LT		 608 dev_err(&port->dev, "Parity mode not supported "
609 "by device\n");
610 }
611
612 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
39a66b8d 613 cp2101_get_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 614 bits &= ~BITS_STOP_MASK;
615 if (cflag & CSTOPB) {
616 bits |= BITS_STOP_2;
617 dbg("%s - stop bits = 2", __FUNCTION__);
618 } else {
619 bits |= BITS_STOP_1;
620 dbg("%s - stop bits = 1", __FUNCTION__);
621 }
39a66b8d 622 if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
1da177e4
LT		 623 dev_err(&port->dev, "Number of stop bits requested "
624 "not supported by device\n");
625 }
39a66b8d
CS		 626
627 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
628 cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16);
629 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
630 __FUNCTION__, modem_ctl[0], modem_ctl[1],
631 modem_ctl[2], modem_ctl[3]);
632
633 if (cflag & CRTSCTS) {
634 modem_ctl[0] &= ~0x7B;
635 modem_ctl[0] |= 0x09;
636 modem_ctl[1] = 0x80;
637 dbg("%s - flow control = CRTSCTS", __FUNCTION__);
638 } else {
639 modem_ctl[0] &= ~0x7B;
640 modem_ctl[0] |= 0x01;
641 modem_ctl[1] |= 0x40;
642 dbg("%s - flow control = NONE", __FUNCTION__);
643 }
644
645 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
646 __FUNCTION__, modem_ctl[0], modem_ctl[1],
647 modem_ctl[2], modem_ctl[3]);
648 cp2101_set_config(port, CP2101_MODEMCTL, modem_ctl, 16);
649 }
650
651}
652
653static int cp2101_tiocmset (struct usb_serial_port *port, struct file *file,
654 unsigned int set, unsigned int clear)
655{
656 int control = 0;
657
658 dbg("%s - port %d", __FUNCTION__, port->number);
659
660 if (set & TIOCM_RTS) {
661 control |= CONTROL_RTS;
662 control |= CONTROL_WRITE_RTS;
663 }
664 if (set & TIOCM_DTR) {
665 control |= CONTROL_DTR;
666 control |= CONTROL_WRITE_DTR;
667 }
668 if (clear & TIOCM_RTS) {
669 control &= ~CONTROL_RTS;
670 control |= CONTROL_WRITE_RTS;
671 }
672 if (clear & TIOCM_DTR) {
673 control &= ~CONTROL_DTR;
674 control |= CONTROL_WRITE_DTR;
675 }
676
677 dbg("%s - control = 0x%.4x", __FUNCTION__, control);
678
679 return cp2101_set_config(port, CP2101_CONTROL, &control, 2);
680
681}
682
683static int cp2101_tiocmget (struct usb_serial_port *port, struct file *file)
684{
685 int control, result;
686
687 dbg("%s - port %d", __FUNCTION__, port->number);
688
689 cp2101_get_config(port, CP2101_CONTROL, &control, 1);
690
691 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
692 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
693 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
694 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
695 |((control & CONTROL_RING)? TIOCM_RI : 0)
696 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
697
698 dbg("%s - control = 0x%.2x", __FUNCTION__, control);
699
700 return result;
1da177e4
LT		 701}
702
703static void cp2101_break_ctl (struct usb_serial_port *port, int break_state)
704{
39a66b8d 705 int state;
1da177e4
LT		 706
707 dbg("%s - port %d", __FUNCTION__, port->number);
708 if (break_state == 0)
709 state = BREAK_OFF;
710 else
711 state = BREAK_ON;
712 dbg("%s - turning break %s", __FUNCTION__,
713 state==BREAK_OFF ? "off" : "on");
39a66b8d 714 cp2101_set_config(port, CP2101_BREAK, &state, 2);
1da177e4
LT		 715}
716
717static int cp2101_startup (struct usb_serial *serial)
718{
39a66b8d 719 /* CP2101 buffers behave strangely unless device is reset */
1da177e4
LT		 720 usb_reset_device(serial->dev);
721 return 0;
722}
723
724static void cp2101_shutdown (struct usb_serial *serial)
725{
726 int i;
727
728 dbg("%s", __FUNCTION__);
729
39a66b8d 730 /* Stop reads and writes on all ports */
1da177e4
LT		 731 for (i=0; i < serial->num_ports; ++i) {
732 cp2101_cleanup(serial->port[i]);
733 }
734}
735
736static int __init cp2101_init (void)
737{
738 int retval;
739
740 retval = usb_serial_register(&cp2101_device);
741 if (retval)
39a66b8d 742 return retval; /* Failed to register */
1da177e4
LT		 743
744 retval = usb_register(&cp2101_driver);
745 if (retval) {
39a66b8d 746 /* Failed to register */
1da177e4
LT		 747 usb_serial_deregister(&cp2101_device);
748 return retval;
749 }
750
39a66b8d 751 /* Success */
1da177e4
LT		 752 info(DRIVER_DESC " " DRIVER_VERSION);
753 return 0;
754}
755
756static void __exit cp2101_exit (void)
757{
758 usb_deregister (&cp2101_driver);
759 usb_serial_deregister (&cp2101_device);
760}
761
762module_init(cp2101_init);
763module_exit(cp2101_exit);
764
765MODULE_DESCRIPTION(DRIVER_DESC);
766MODULE_VERSION(DRIVER_VERSION);
767MODULE_LICENSE("GPL");
768
769module_param(debug, bool, S_IRUGO | S_IWUSR);
770MODULE_PARM_DESC(debug, "Enable verbose debugging messages");
Linux kernel - Deliverables
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