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usb gadget: fix fsl_usb2_udc potential OOPS
[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 */
59224f53 62 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
92f5cae2 63 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
212a4b4e 64 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
e988fc8a
CS		 65 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
66 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
92f5cae2 67 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
e988fc8a
CS		 68 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
69 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
fc4bd64c
JH		 70 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
71 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
e988fc8a 72 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
78001e3d
BS		 73 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
74 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
8be27c2d 75 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
78001e3d 76 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
e988fc8a 77 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
61926b97 78 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
ebaf494e 79 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
e05998d5 80 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
b0ce84d5 81 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
39a66b8d 82 { } /* Terminating Entry */
1da177e4
LT		 83};
84
85MODULE_DEVICE_TABLE (usb, id_table);
86
87static struct usb_driver cp2101_driver = {
269bda1c 88 .name = "cp2101",
1da177e4
LT		 89 .probe = usb_serial_probe,
90 .disconnect = usb_serial_disconnect,
91 .id_table = id_table,
ba9dc657 92 .no_dynamic_id = 1,
1da177e4
LT		 93};
94
ea65370d 95static struct usb_serial_driver cp2101_device = {
18fcac35
GKH		 96 .driver = {
97 .owner = THIS_MODULE,
269bda1c 98 .name = "cp2101",
18fcac35 99 },
d9b1b787 100 .usb_driver = &cp2101_driver,
1da177e4
LT		 101 .id_table = id_table,
102 .num_interrupt_in = 0,
8be27c2d
JL		 103 .num_bulk_in = NUM_DONT_CARE,
104 .num_bulk_out = NUM_DONT_CARE,
1da177e4
LT		 105 .num_ports = 1,
106 .open = cp2101_open,
107 .close = cp2101_close,
108 .break_ctl = cp2101_break_ctl,
109 .set_termios = cp2101_set_termios,
39a66b8d
CS		 110 .tiocmget = cp2101_tiocmget,
111 .tiocmset = cp2101_tiocmset,
1da177e4
LT		 112 .attach = cp2101_startup,
113 .shutdown = cp2101_shutdown,
114};
115
39a66b8d 116/* Config request types */
1da177e4
LT		 117#define REQTYPE_HOST_TO_DEVICE 0x41
118#define REQTYPE_DEVICE_TO_HOST 0xc1
119
39a66b8d
CS		 120/* Config SET requests. To GET, add 1 to the request number */
121#define CP2101_UART 0x00 /* Enable / Disable */
122#define CP2101_BAUDRATE 0x01 /* (BAUD_RATE_GEN_FREQ / baudrate) */
123#define CP2101_BITS 0x03 /* 0x(0)(databits)(parity)(stopbits) */
124#define CP2101_BREAK 0x05 /* On / Off */
125#define CP2101_CONTROL 0x07 /* Flow control line states */
126#define CP2101_MODEMCTL 0x13 /* Modem controls */
127#define CP2101_CONFIG_6 0x19 /* 6 bytes of config data ??? */
1da177e4 128
39a66b8d 129/* CP2101_UART */
1da177e4
LT		 130#define UART_ENABLE 0x0001
131#define UART_DISABLE 0x0000
132
39a66b8d 133/* CP2101_BAUDRATE */
1da177e4
LT		 134#define BAUD_RATE_GEN_FREQ 0x384000
135
39a66b8d 136/* CP2101_BITS */
1da177e4 137#define BITS_DATA_MASK 0X0f00
39a66b8d 138#define BITS_DATA_5 0X0500
1da177e4
LT		 139#define BITS_DATA_6 0X0600
140#define BITS_DATA_7 0X0700
141#define BITS_DATA_8 0X0800
142#define BITS_DATA_9 0X0900
143
144#define BITS_PARITY_MASK 0x00f0
145#define BITS_PARITY_NONE 0x0000
146#define BITS_PARITY_ODD 0x0010
147#define BITS_PARITY_EVEN 0x0020
148#define BITS_PARITY_MARK 0x0030
149#define BITS_PARITY_SPACE 0x0040
150
151#define BITS_STOP_MASK 0x000f
152#define BITS_STOP_1 0x0000
153#define BITS_STOP_1_5 0x0001
154#define BITS_STOP_2 0x0002
39a66b8d
CS		 155
156/* CP2101_BREAK */
1da177e4
LT		 157#define BREAK_ON 0x0000
158#define BREAK_OFF 0x0001
159
39a66b8d
CS		 160/* CP2101_CONTROL */
161#define CONTROL_DTR 0x0001
162#define CONTROL_RTS 0x0002
163#define CONTROL_CTS 0x0010
164#define CONTROL_DSR 0x0020
165#define CONTROL_RING 0x0040
166#define CONTROL_DCD 0x0080
167#define CONTROL_WRITE_DTR 0x0100
168#define CONTROL_WRITE_RTS 0x0200
1da177e4 169
39a66b8d
CS		 170/*
171 * cp2101_get_config
172 * Reads from the CP2101 configuration registers
173 * 'size' is specified in bytes.
174 * 'data' is a pointer to a pre-allocated array of integers large
175 * enough to hold 'size' bytes (with 4 bytes to each integer)
176 */
177static int cp2101_get_config(struct usb_serial_port* port, u8 request,
178 unsigned int *data, int size)
1da177e4
LT		 179{
180 struct usb_serial *serial = port->serial;
53ebb3b8 181 __le32 *buf;
39a66b8d
CS		 182 int result, i, length;
183
184 /* Number of integers required to contain the array */
185 length = (((size - 1) | 3) + 1)/4;
186
53ebb3b8 187 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
39a66b8d
CS		 188 if (!buf) {
189 dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
190 return -ENOMEM;
191 }
1da177e4 192
39a66b8d 193 /* For get requests, the request number must be incremented */
1da177e4
LT		 194 request++;
195
39a66b8d 196 /* Issue the request, attempting to read 'size' bytes */
1da177e4
LT		 197 result = usb_control_msg (serial->dev,usb_rcvctrlpipe (serial->dev, 0),
198 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
39a66b8d 199 0, buf, size, 300);
1da177e4 200
39a66b8d
CS		 201 /* Convert data into an array of integers */
202 for (i=0; i<length; i++)
203 data[i] = le32_to_cpu(buf[i]);
1da177e4 204
39a66b8d 205 kfree(buf);
1da177e4 206
39a66b8d
CS		 207 if (result != size) {
208 dev_err(&port->dev, "%s - Unable to send config request, "
209 "request=0x%x size=%d result=%d\n",
210 __FUNCTION__, request, size, result);
211 return -EPROTO;
212 }
1da177e4 213
39a66b8d 214 return 0;
1da177e4
LT		 215}
216
39a66b8d
CS		 217/*
218 * cp2101_set_config
219 * Writes to the CP2101 configuration registers
220 * Values less than 16 bits wide are sent directly
221 * 'size' is specified in bytes.
222 */
223static int cp2101_set_config(struct usb_serial_port* port, u8 request,
224 unsigned int *data, int size)
1da177e4
LT		 225{
226 struct usb_serial *serial = port->serial;
53ebb3b8 227 __le32 *buf;
39a66b8d 228 int result, i, length;
1da177e4 229
39a66b8d
CS		 230 /* Number of integers required to contain the array */
231 length = (((size - 1) | 3) + 1)/4;
232
53ebb3b8 233 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
39a66b8d
CS		 234 if (!buf) {
235 dev_err(&port->dev, "%s - out of memory.\n",
236 __FUNCTION__);
237 return -ENOMEM;
238 }
239
240 /* Array of integers into bytes */
241 for (i = 0; i < length; i++)
242 buf[i] = cpu_to_le32(data[i]);
243
244 if (size > 2) {
245 result = usb_control_msg (serial->dev,
246 usb_sndctrlpipe(serial->dev, 0),
247 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
248 0, buf, size, 300);
249 } else {
250 result = usb_control_msg (serial->dev,
251 usb_sndctrlpipe(serial->dev, 0),
252 request, REQTYPE_HOST_TO_DEVICE, data[0],
253 0, NULL, 0, 300);
1da177e4
LT		 254 }
255
39a66b8d
CS		 256 kfree(buf);
257
258 if ((size > 2 && result != size) || result < 0) {
259 dev_err(&port->dev, "%s - Unable to send request, "
260 "request=0x%x size=%d result=%d\n",
261 __FUNCTION__, request, size, result);
262 return -EPROTO;
263 }
1da177e4 264
39a66b8d
CS		 265 /* Single data value */
266 result = usb_control_msg (serial->dev,
267 usb_sndctrlpipe(serial->dev, 0),
268 request, REQTYPE_HOST_TO_DEVICE, data[0],
269 0, NULL, 0, 300);
1da177e4
LT		 270 return 0;
271}
272
39a66b8d
CS		 273/*
274 * cp2101_set_config_single
275 * Convenience function for calling cp2101_set_config on single data values
276 * without requiring an integer pointer
277 */
278static inline int cp2101_set_config_single(struct usb_serial_port* port,
279 u8 request, unsigned int data)
280{
281 return cp2101_set_config(port, request, &data, 2);
282}
283
1da177e4
LT		 284static int cp2101_open (struct usb_serial_port *port, struct file *filp)
285{
286 struct usb_serial *serial = port->serial;
287 int result;
288
289 dbg("%s - port %d", __FUNCTION__, port->number);
290
39a66b8d 291 if (cp2101_set_config_single(port, CP2101_UART, UART_ENABLE)) {
1da177e4
LT		 292 dev_err(&port->dev, "%s - Unable to enable UART\n",
293 __FUNCTION__);
294 return -EPROTO;
295 }
296
297 /* Start reading from the device */
298 usb_fill_bulk_urb (port->read_urb, serial->dev,
299 usb_rcvbulkpipe(serial->dev,
300 port->bulk_in_endpointAddress),
301 port->read_urb->transfer_buffer,
302 port->read_urb->transfer_buffer_length,
303 serial->type->read_bulk_callback,
304 port);
305 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
306 if (result) {
307 dev_err(&port->dev, "%s - failed resubmitting read urb, "
308 "error %d\n", __FUNCTION__, result);
309 return result;
310 }
311
39a66b8d 312 /* Configure the termios structure */
1da177e4
LT		 313 cp2101_get_termios(port);
314
39a66b8d
CS		 315 /* Set the DTR and RTS pins low */
316 cp2101_tiocmset(port, NULL, TIOCM_DTR | TIOCM_RTS, 0);
317
1da177e4
LT		 318 return 0;
319}
320
321static void cp2101_cleanup (struct usb_serial_port *port)
322{
323 struct usb_serial *serial = port->serial;
324
325 dbg("%s - port %d", __FUNCTION__, port->number);
326
327 if (serial->dev) {
328 /* shutdown any bulk reads that might be going on */
329 if (serial->num_bulk_out)
330 usb_kill_urb(port->write_urb);
331 if (serial->num_bulk_in)
332 usb_kill_urb(port->read_urb);
333 }
334}
335
336static void cp2101_close (struct usb_serial_port *port, struct file * filp)
337{
338 dbg("%s - port %d", __FUNCTION__, port->number);
339
340 /* shutdown our urbs */
341 dbg("%s - shutting down urbs", __FUNCTION__);
342 usb_kill_urb(port->write_urb);
343 usb_kill_urb(port->read_urb);
344
39a66b8d 345 cp2101_set_config_single(port, CP2101_UART, UART_DISABLE);
1da177e4
LT		 346}
347
39a66b8d
CS		 348/*
349 * cp2101_get_termios
350 * Reads the baud rate, data bits, parity, stop bits and flow control mode
351 * from the device, corrects any unsupported values, and configures the
352 * termios structure to reflect the state of the device
353 */
1da177e4
LT		 354static void cp2101_get_termios (struct usb_serial_port *port)
355{
39a66b8d 356 unsigned int cflag, modem_ctl[4];
1da177e4
LT		 357 int baud;
358 int bits;
359
360 dbg("%s - port %d", __FUNCTION__, port->number);
361
01e96d28 362 if (!port->tty || !port->tty->termios) {
1da177e4
LT		 363 dbg("%s - no tty structures", __FUNCTION__);
364 return;
365 }
1da177e4 366
39a66b8d
CS		 367 cp2101_get_config(port, CP2101_BAUDRATE, &baud, 2);
368 /* Convert to baudrate */
1da177e4
LT		 369 if (baud)
370 baud = BAUD_RATE_GEN_FREQ / baud;
371
372 dbg("%s - baud rate = %d", __FUNCTION__, baud);
9ab0f202
AC		 373
374 tty_encode_baud_rate(port->tty, baud, baud);
375 cflag = port->tty->termios->c_cflag;
1da177e4 376
39a66b8d 377 cp2101_get_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 378 cflag &= ~CSIZE;
379 switch(bits & BITS_DATA_MASK) {
39a66b8d
CS		 380 case BITS_DATA_5:
381 dbg("%s - data bits = 5", __FUNCTION__);
382 cflag |= CS5;
383 break;
1da177e4
LT		 384 case BITS_DATA_6:
385 dbg("%s - data bits = 6", __FUNCTION__);
386 cflag |= CS6;
387 break;
388 case BITS_DATA_7:
389 dbg("%s - data bits = 7", __FUNCTION__);
390 cflag |= CS7;
391 break;
392 case BITS_DATA_8:
393 dbg("%s - data bits = 8", __FUNCTION__);
394 cflag |= CS8;
395 break;
396 case BITS_DATA_9:
397 dbg("%s - data bits = 9 (not supported, "
398 "using 8 data bits)", __FUNCTION__);
399 cflag |= CS8;
400 bits &= ~BITS_DATA_MASK;
401 bits |= BITS_DATA_8;
39a66b8d 402 cp2101_set_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 403 break;
404 default:
405 dbg("%s - Unknown number of data bits, "
406 "using 8", __FUNCTION__);
407 cflag |= CS8;
408 bits &= ~BITS_DATA_MASK;
409 bits |= BITS_DATA_8;
39a66b8d 410 cp2101_set_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 411 break;
412 }
413
414 switch(bits & BITS_PARITY_MASK) {
415 case BITS_PARITY_NONE:
416 dbg("%s - parity = NONE", __FUNCTION__);
417 cflag &= ~PARENB;
418 break;
419 case BITS_PARITY_ODD:
420 dbg("%s - parity = ODD", __FUNCTION__);
421 cflag |= (PARENB|PARODD);
422 break;
423 case BITS_PARITY_EVEN:
424 dbg("%s - parity = EVEN", __FUNCTION__);
425 cflag &= ~PARODD;
426 cflag |= PARENB;
427 break;
428 case BITS_PARITY_MARK:
429 dbg("%s - parity = MARK (not supported, "
430 "disabling parity)", __FUNCTION__);
431 cflag &= ~PARENB;
432 bits &= ~BITS_PARITY_MASK;
39a66b8d 433 cp2101_set_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 434 break;
435 case BITS_PARITY_SPACE:
436 dbg("%s - parity = SPACE (not supported, "
437 "disabling parity)", __FUNCTION__);
438 cflag &= ~PARENB;
439 bits &= ~BITS_PARITY_MASK;
39a66b8d 440 cp2101_set_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 441 break;
442 default:
443 dbg("%s - Unknown parity mode, "
444 "disabling parity", __FUNCTION__);
445 cflag &= ~PARENB;
446 bits &= ~BITS_PARITY_MASK;
39a66b8d 447 cp2101_set_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 448 break;
449 }
450
451 cflag &= ~CSTOPB;
452 switch(bits & BITS_STOP_MASK) {
453 case BITS_STOP_1:
454 dbg("%s - stop bits = 1", __FUNCTION__);
455 break;
456 case BITS_STOP_1_5:
457 dbg("%s - stop bits = 1.5 (not supported, "
39a66b8d 458 "using 1 stop bit)", __FUNCTION__);
1da177e4 459 bits &= ~BITS_STOP_MASK;
39a66b8d 460 cp2101_set_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 461 break;
462 case BITS_STOP_2:
463 dbg("%s - stop bits = 2", __FUNCTION__);
464 cflag |= CSTOPB;
465 break;
466 default:
467 dbg("%s - Unknown number of stop bits, "
468 "using 1 stop bit", __FUNCTION__);
469 bits &= ~BITS_STOP_MASK;
39a66b8d 470 cp2101_set_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 471 break;
472 }
473
39a66b8d
CS		 474 cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16);
475 if (modem_ctl[0] & 0x0008) {
476 dbg("%s - flow control = CRTSCTS", __FUNCTION__);
477 cflag |= CRTSCTS;
478 } else {
479 dbg("%s - flow control = NONE", __FUNCTION__);
480 cflag &= ~CRTSCTS;
481 }
482
1da177e4
LT		 483 port->tty->termios->c_cflag = cflag;
484}
485
486static void cp2101_set_termios (struct usb_serial_port *port,
606d099c 487 struct ktermios *old_termios)
1da177e4 488{
9ab0f202 489 unsigned int cflag, old_cflag;
39a66b8d
CS		 490 int baud=0, bits;
491 unsigned int modem_ctl[4];
1da177e4
LT		 492
493 dbg("%s - port %d", __FUNCTION__, port->number);
494
c4e41562 495 if (!port->tty || !port->tty->termios) {
1da177e4
LT		 496 dbg("%s - no tty structures", __FUNCTION__);
497 return;
498 }
9ab0f202
AC		 499 port->tty->termios->c_cflag &= ~CMSPAR;
500
1da177e4 501 cflag = port->tty->termios->c_cflag;
01e96d28
AC		 502 old_cflag = old_termios->c_cflag;
503 baud = tty_get_baud_rate(port->tty);
1da177e4
LT		 504
505 /* If the baud rate is to be updated*/
01e96d28
AC		 506 if (baud != tty_termios_baud_rate(old_termios)) {
507 switch (baud) {
508 case 0:
509 case 600:
510 case 1200:
511 case 1800:
512 case 2400:
513 case 4800:
514 case 7200:
515 case 9600:
516 case 14400:
517 case 19200:
518 case 28800:
519 case 38400:
520 case 55854:
521 case 57600:
522 case 115200:
523 case 127117:
524 case 230400:
525 case 460800:
526 case 921600:
527 case 3686400:
528 break;
1da177e4 529 default:
01e96d28 530 baud = 9600;
1da177e4
LT		 531 break;
532 }
533
534 if (baud) {
535 dbg("%s - Setting baud rate to %d baud", __FUNCTION__,
536 baud);
39a66b8d 537 if (cp2101_set_config_single(port, CP2101_BAUDRATE,
9ab0f202 538 (BAUD_RATE_GEN_FREQ / baud))) {
1da177e4
LT		 539 dev_err(&port->dev, "Baud rate requested not "
540 "supported by device\n");
9ab0f202
AC		 541 baud = tty_termios_baud_rate(old_termios);
542 }
1da177e4
LT		 543 }
544 }
9ab0f202
AC		 545 /* Report back the resulting baud rate */
546 tty_encode_baud_rate(port->tty, baud, baud);
1da177e4 547
39a66b8d 548 /* If the number of data bits is to be updated */
1da177e4 549 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
39a66b8d 550 cp2101_get_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 551 bits &= ~BITS_DATA_MASK;
552 switch (cflag & CSIZE) {
39a66b8d
CS		 553 case CS5:
554 bits |= BITS_DATA_5;
555 dbg("%s - data bits = 5", __FUNCTION__);
556 break;
1da177e4
LT		 557 case CS6:
558 bits |= BITS_DATA_6;
559 dbg("%s - data bits = 6", __FUNCTION__);
560 break;
561 case CS7:
562 bits |= BITS_DATA_7;
563 dbg("%s - data bits = 7", __FUNCTION__);
564 break;
565 case CS8:
566 bits |= BITS_DATA_8;
567 dbg("%s - data bits = 8", __FUNCTION__);
568 break;
569 /*case CS9:
570 bits |= BITS_DATA_9;
571 dbg("%s - data bits = 9", __FUNCTION__);
572 break;*/
573 default:
574 dev_err(&port->dev, "cp2101 driver does not "
575 "support the number of bits requested,"
576 " using 8 bit mode\n");
577 bits |= BITS_DATA_8;
578 break;
579 }
39a66b8d 580 if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
1da177e4
LT		 581 dev_err(&port->dev, "Number of data bits requested "
582 "not supported by device\n");
583 }
584
585 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
39a66b8d 586 cp2101_get_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 587 bits &= ~BITS_PARITY_MASK;
588 if (cflag & PARENB) {
589 if (cflag & PARODD) {
590 bits |= BITS_PARITY_ODD;
591 dbg("%s - parity = ODD", __FUNCTION__);
592 } else {
593 bits |= BITS_PARITY_EVEN;
594 dbg("%s - parity = EVEN", __FUNCTION__);
595 }
596 }
39a66b8d 597 if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
1da177e4
LT		 598 dev_err(&port->dev, "Parity mode not supported "
599 "by device\n");
600 }
601
602 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
39a66b8d 603 cp2101_get_config(port, CP2101_BITS, &bits, 2);
1da177e4
LT		 604 bits &= ~BITS_STOP_MASK;
605 if (cflag & CSTOPB) {
606 bits |= BITS_STOP_2;
607 dbg("%s - stop bits = 2", __FUNCTION__);
608 } else {
609 bits |= BITS_STOP_1;
610 dbg("%s - stop bits = 1", __FUNCTION__);
611 }
39a66b8d 612 if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
1da177e4
LT		 613 dev_err(&port->dev, "Number of stop bits requested "
614 "not supported by device\n");
615 }
39a66b8d
CS		 616
617 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
618 cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16);
619 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
620 __FUNCTION__, modem_ctl[0], modem_ctl[1],
621 modem_ctl[2], modem_ctl[3]);
622
623 if (cflag & CRTSCTS) {
624 modem_ctl[0] &= ~0x7B;
625 modem_ctl[0] |= 0x09;
626 modem_ctl[1] = 0x80;
627 dbg("%s - flow control = CRTSCTS", __FUNCTION__);
628 } else {
629 modem_ctl[0] &= ~0x7B;
630 modem_ctl[0] |= 0x01;
631 modem_ctl[1] |= 0x40;
632 dbg("%s - flow control = NONE", __FUNCTION__);
633 }
634
635 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
636 __FUNCTION__, modem_ctl[0], modem_ctl[1],
637 modem_ctl[2], modem_ctl[3]);
638 cp2101_set_config(port, CP2101_MODEMCTL, modem_ctl, 16);
639 }
640
641}
642
643static int cp2101_tiocmset (struct usb_serial_port *port, struct file *file,
644 unsigned int set, unsigned int clear)
645{
646 int control = 0;
647
648 dbg("%s - port %d", __FUNCTION__, port->number);
649
650 if (set & TIOCM_RTS) {
651 control |= CONTROL_RTS;
652 control |= CONTROL_WRITE_RTS;
653 }
654 if (set & TIOCM_DTR) {
655 control |= CONTROL_DTR;
656 control |= CONTROL_WRITE_DTR;
657 }
658 if (clear & TIOCM_RTS) {
659 control &= ~CONTROL_RTS;
660 control |= CONTROL_WRITE_RTS;
661 }
662 if (clear & TIOCM_DTR) {
663 control &= ~CONTROL_DTR;
664 control |= CONTROL_WRITE_DTR;
665 }
666
667 dbg("%s - control = 0x%.4x", __FUNCTION__, control);
668
669 return cp2101_set_config(port, CP2101_CONTROL, &control, 2);
670
671}
672
673static int cp2101_tiocmget (struct usb_serial_port *port, struct file *file)
674{
675 int control, result;
676
677 dbg("%s - port %d", __FUNCTION__, port->number);
678
679 cp2101_get_config(port, CP2101_CONTROL, &control, 1);
680
681 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
682 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
683 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
684 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
685 |((control & CONTROL_RING)? TIOCM_RI : 0)
686 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
687
688 dbg("%s - control = 0x%.2x", __FUNCTION__, control);
689
690 return result;
1da177e4
LT		 691}
692
693static void cp2101_break_ctl (struct usb_serial_port *port, int break_state)
694{
39a66b8d 695 int state;
1da177e4
LT		 696
697 dbg("%s - port %d", __FUNCTION__, port->number);
698 if (break_state == 0)
699 state = BREAK_OFF;
700 else
701 state = BREAK_ON;
702 dbg("%s - turning break %s", __FUNCTION__,
703 state==BREAK_OFF ? "off" : "on");
39a66b8d 704 cp2101_set_config(port, CP2101_BREAK, &state, 2);
1da177e4
LT		 705}
706
707static int cp2101_startup (struct usb_serial *serial)
708{
39a66b8d 709 /* CP2101 buffers behave strangely unless device is reset */
1da177e4
LT		 710 usb_reset_device(serial->dev);
711 return 0;
712}
713
714static void cp2101_shutdown (struct usb_serial *serial)
715{
716 int i;
717
718 dbg("%s", __FUNCTION__);
719
39a66b8d 720 /* Stop reads and writes on all ports */
1da177e4
LT		 721 for (i=0; i < serial->num_ports; ++i) {
722 cp2101_cleanup(serial->port[i]);
723 }
724}
725
726static int __init cp2101_init (void)
727{
728 int retval;
729
730 retval = usb_serial_register(&cp2101_device);
731 if (retval)
39a66b8d 732 return retval; /* Failed to register */
1da177e4
LT		 733
734 retval = usb_register(&cp2101_driver);
735 if (retval) {
39a66b8d 736 /* Failed to register */
1da177e4
LT		 737 usb_serial_deregister(&cp2101_device);
738 return retval;
739 }
740
39a66b8d 741 /* Success */
1da177e4
LT		 742 info(DRIVER_DESC " " DRIVER_VERSION);
743 return 0;
744}
745
746static void __exit cp2101_exit (void)
747{
748 usb_deregister (&cp2101_driver);
749 usb_serial_deregister (&cp2101_device);
750}
751
752module_init(cp2101_init);
753module_exit(cp2101_exit);
754
755MODULE_DESCRIPTION(DRIVER_DESC);
756MODULE_VERSION(DRIVER_VERSION);
757MODULE_LICENSE("GPL");
758
759module_param(debug, bool, S_IRUGO | S_IWUSR);
760MODULE_PARM_DESC(debug, "Enable verbose debugging messages");
Linux kernel - Deliverables
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