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-rw-r--r--drivers/usb/serial/cp210x.c788
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diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
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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 */
15
16#include <linux/kernel.h>
17#include <linux/errno.h>
18#include <linux/slab.h>
19#include <linux/tty.h>
20#include <linux/tty_flip.h>
21#include <linux/module.h>
22#include <linux/moduleparam.h>
23#include <linux/usb.h>
24#include <linux/uaccess.h>
25#include <linux/usb/serial.h>
26
27/*
28 * Version Information
29 */
30#define DRIVER_VERSION "v0.08"
31#define DRIVER_DESC "Silicon Labs CP2101/CP2102 RS232 serial adaptor driver"
32
33/*
34 * Function Prototypes
35 */
36static int cp2101_open(struct tty_struct *, struct usb_serial_port *,
37 struct file *);
38static void cp2101_cleanup(struct usb_serial_port *);
39static void cp2101_close(struct tty_struct *, struct usb_serial_port *,
40 struct file*);
41static void cp2101_get_termios(struct tty_struct *);
42static void cp2101_set_termios(struct tty_struct *, struct usb_serial_port *,
43 struct ktermios*);
44static int cp2101_tiocmget(struct tty_struct *, struct file *);
45static int cp2101_tiocmset(struct tty_struct *, struct file *,
46 unsigned int, unsigned int);
47static void cp2101_break_ctl(struct tty_struct *, int);
48static int cp2101_startup(struct usb_serial *);
49static void cp2101_shutdown(struct usb_serial *);
50
51
52static int debug;
53
54static struct usb_device_id id_table [] = {
55 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
56 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
57 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
58 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
59 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
60 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
61 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
62 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
63 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
64 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
65 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
66 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
67 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
68 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
69 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
70 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
71 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
72 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
73 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
74 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
75 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
76 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
77 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
78 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
79 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
80 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
81 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
82 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
83 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
84 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
85 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
86 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */
87 { USB_DEVICE(0x10c4, 0x8293) }, /* Telegesys ETRX2USB */
88 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
89 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
90 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
91 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
92 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
93 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
94 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
95 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
96 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
97 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
98 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
99 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
100 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
101 { } /* Terminating Entry */
102};
103
104MODULE_DEVICE_TABLE(usb, id_table);
105
106static struct usb_driver cp2101_driver = {
107 .name = "cp2101",
108 .probe = usb_serial_probe,
109 .disconnect = usb_serial_disconnect,
110 .id_table = id_table,
111 .no_dynamic_id = 1,
112};
113
114static struct usb_serial_driver cp2101_device = {
115 .driver = {
116 .owner = THIS_MODULE,
117 .name = "cp2101",
118 },
119 .usb_driver = &cp2101_driver,
120 .id_table = id_table,
121 .num_ports = 1,
122 .open = cp2101_open,
123 .close = cp2101_close,
124 .break_ctl = cp2101_break_ctl,
125 .set_termios = cp2101_set_termios,
126 .tiocmget = cp2101_tiocmget,
127 .tiocmset = cp2101_tiocmset,
128 .attach = cp2101_startup,
129 .shutdown = cp2101_shutdown,
130};
131
132/* Config request types */
133#define REQTYPE_HOST_TO_DEVICE 0x41
134#define REQTYPE_DEVICE_TO_HOST 0xc1
135
136/* Config SET requests. To GET, add 1 to the request number */
137#define CP2101_UART 0x00 /* Enable / Disable */
138#define CP2101_BAUDRATE 0x01 /* (BAUD_RATE_GEN_FREQ / baudrate) */
139#define CP2101_BITS 0x03 /* 0x(0)(databits)(parity)(stopbits) */
140#define CP2101_BREAK 0x05 /* On / Off */
141#define CP2101_CONTROL 0x07 /* Flow control line states */
142#define CP2101_MODEMCTL 0x13 /* Modem controls */
143#define CP2101_CONFIG_6 0x19 /* 6 bytes of config data ??? */
144
145/* CP2101_UART */
146#define UART_ENABLE 0x0001
147#define UART_DISABLE 0x0000
148
149/* CP2101_BAUDRATE */
150#define BAUD_RATE_GEN_FREQ 0x384000
151
152/* CP2101_BITS */
153#define BITS_DATA_MASK 0X0f00
154#define BITS_DATA_5 0X0500
155#define BITS_DATA_6 0X0600
156#define BITS_DATA_7 0X0700
157#define BITS_DATA_8 0X0800
158#define BITS_DATA_9 0X0900
159
160#define BITS_PARITY_MASK 0x00f0
161#define BITS_PARITY_NONE 0x0000
162#define BITS_PARITY_ODD 0x0010
163#define BITS_PARITY_EVEN 0x0020
164#define BITS_PARITY_MARK 0x0030
165#define BITS_PARITY_SPACE 0x0040
166
167#define BITS_STOP_MASK 0x000f
168#define BITS_STOP_1 0x0000
169#define BITS_STOP_1_5 0x0001
170#define BITS_STOP_2 0x0002
171
172/* CP2101_BREAK */
173#define BREAK_ON 0x0000
174#define BREAK_OFF 0x0001
175
176/* CP2101_CONTROL */
177#define CONTROL_DTR 0x0001
178#define CONTROL_RTS 0x0002
179#define CONTROL_CTS 0x0010
180#define CONTROL_DSR 0x0020
181#define CONTROL_RING 0x0040
182#define CONTROL_DCD 0x0080
183#define CONTROL_WRITE_DTR 0x0100
184#define CONTROL_WRITE_RTS 0x0200
185
186/*
187 * cp2101_get_config
188 * Reads from the CP2101 configuration registers
189 * 'size' is specified in bytes.
190 * 'data' is a pointer to a pre-allocated array of integers large
191 * enough to hold 'size' bytes (with 4 bytes to each integer)
192 */
193static int cp2101_get_config(struct usb_serial_port *port, u8 request,
194 unsigned int *data, int size)
195{
196 struct usb_serial *serial = port->serial;
197 __le32 *buf;
198 int result, i, length;
199
200 /* Number of integers required to contain the array */
201 length = (((size - 1) | 3) + 1)/4;
202
203 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
204 if (!buf) {
205 dev_err(&port->dev, "%s - out of memory.\n", __func__);
206 return -ENOMEM;
207 }
208
209 /* For get requests, the request number must be incremented */
210 request++;
211
212 /* Issue the request, attempting to read 'size' bytes */
213 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
214 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
215 0, buf, size, 300);
216
217 /* Convert data into an array of integers */
218 for (i = 0; i < length; i++)
219 data[i] = le32_to_cpu(buf[i]);
220
221 kfree(buf);
222
223 if (result != size) {
224 dbg("%s - Unable to send config request, "
225 "request=0x%x size=%d result=%d\n",
226 __func__, request, size, result);
227 return -EPROTO;
228 }
229
230 return 0;
231}
232
233/*
234 * cp2101_set_config
235 * Writes to the CP2101 configuration registers
236 * Values less than 16 bits wide are sent directly
237 * 'size' is specified in bytes.
238 */
239static int cp2101_set_config(struct usb_serial_port *port, u8 request,
240 unsigned int *data, int size)
241{
242 struct usb_serial *serial = port->serial;
243 __le32 *buf;
244 int result, i, length;
245
246 /* Number of integers required to contain the array */
247 length = (((size - 1) | 3) + 1)/4;
248
249 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
250 if (!buf) {
251 dev_err(&port->dev, "%s - out of memory.\n",
252 __func__);
253 return -ENOMEM;
254 }
255
256 /* Array of integers into bytes */
257 for (i = 0; i < length; i++)
258 buf[i] = cpu_to_le32(data[i]);
259
260 if (size > 2) {
261 result = usb_control_msg(serial->dev,
262 usb_sndctrlpipe(serial->dev, 0),
263 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
264 0, buf, size, 300);
265 } else {
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);
270 }
271
272 kfree(buf);
273
274 if ((size > 2 && result != size) || result < 0) {
275 dbg("%s - Unable to send request, "
276 "request=0x%x size=%d result=%d\n",
277 __func__, request, size, result);
278 return -EPROTO;
279 }
280
281 /* Single data value */
282 result = usb_control_msg(serial->dev,
283 usb_sndctrlpipe(serial->dev, 0),
284 request, REQTYPE_HOST_TO_DEVICE, data[0],
285 0, NULL, 0, 300);
286 return 0;
287}
288
289/*
290 * cp2101_set_config_single
291 * Convenience function for calling cp2101_set_config on single data values
292 * without requiring an integer pointer
293 */
294static inline int cp2101_set_config_single(struct usb_serial_port *port,
295 u8 request, unsigned int data)
296{
297 return cp2101_set_config(port, request, &data, 2);
298}
299
300/*
301 * cp2101_quantise_baudrate
302 * Quantises the baud rate as per AN205 Table 1
303 */
304static unsigned int cp2101_quantise_baudrate(unsigned int baud) {
305 if (baud <= 56) baud = 0;
306 else if (baud <= 300) baud = 300;
307 else if (baud <= 600) baud = 600;
308 else if (baud <= 1200) baud = 1200;
309 else if (baud <= 1800) baud = 1800;
310 else if (baud <= 2400) baud = 2400;
311 else if (baud <= 4000) baud = 4000;
312 else if (baud <= 4803) baud = 4800;
313 else if (baud <= 7207) baud = 7200;
314 else if (baud <= 9612) baud = 9600;
315 else if (baud <= 14428) baud = 14400;
316 else if (baud <= 16062) baud = 16000;
317 else if (baud <= 19250) baud = 19200;
318 else if (baud <= 28912) baud = 28800;
319 else if (baud <= 38601) baud = 38400;
320 else if (baud <= 51558) baud = 51200;
321 else if (baud <= 56280) baud = 56000;
322 else if (baud <= 58053) baud = 57600;
323 else if (baud <= 64111) baud = 64000;
324 else if (baud <= 77608) baud = 76800;
325 else if (baud <= 117028) baud = 115200;
326 else if (baud <= 129347) baud = 128000;
327 else if (baud <= 156868) baud = 153600;
328 else if (baud <= 237832) baud = 230400;
329 else if (baud <= 254234) baud = 250000;
330 else if (baud <= 273066) baud = 256000;
331 else if (baud <= 491520) baud = 460800;
332 else if (baud <= 567138) baud = 500000;
333 else if (baud <= 670254) baud = 576000;
334 else if (baud <= 1053257) baud = 921600;
335 else if (baud <= 1474560) baud = 1228800;
336 else if (baud <= 2457600) baud = 1843200;
337 else baud = 3686400;
338 return baud;
339}
340
341static int cp2101_open(struct tty_struct *tty, struct usb_serial_port *port,
342 struct file *filp)
343{
344 struct usb_serial *serial = port->serial;
345 int result;
346
347 dbg("%s - port %d", __func__, port->number);
348
349 if (cp2101_set_config_single(port, CP2101_UART, UART_ENABLE)) {
350 dev_err(&port->dev, "%s - Unable to enable UART\n",
351 __func__);
352 return -EPROTO;
353 }
354
355 /* Start reading from the device */
356 usb_fill_bulk_urb(port->read_urb, serial->dev,
357 usb_rcvbulkpipe(serial->dev,
358 port->bulk_in_endpointAddress),
359 port->read_urb->transfer_buffer,
360 port->read_urb->transfer_buffer_length,
361 serial->type->read_bulk_callback,
362 port);
363 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
364 if (result) {
365 dev_err(&port->dev, "%s - failed resubmitting read urb, "
366 "error %d\n", __func__, result);
367 return result;
368 }
369
370 /* Configure the termios structure */
371 cp2101_get_termios(tty);
372
373 /* Set the DTR and RTS pins low */
374 cp2101_tiocmset(tty, NULL, TIOCM_DTR | TIOCM_RTS, 0);
375
376 return 0;
377}
378
379static void cp2101_cleanup(struct usb_serial_port *port)
380{
381 struct usb_serial *serial = port->serial;
382
383 dbg("%s - port %d", __func__, port->number);
384
385 if (serial->dev) {
386 /* shutdown any bulk reads that might be going on */
387 if (serial->num_bulk_out)
388 usb_kill_urb(port->write_urb);
389 if (serial->num_bulk_in)
390 usb_kill_urb(port->read_urb);
391 }
392}
393
394static void cp2101_close(struct tty_struct *tty, struct usb_serial_port *port,
395 struct file *filp)
396{
397 dbg("%s - port %d", __func__, port->number);
398
399 /* shutdown our urbs */
400 dbg("%s - shutting down urbs", __func__);
401 usb_kill_urb(port->write_urb);
402 usb_kill_urb(port->read_urb);
403
404 mutex_lock(&port->serial->disc_mutex);
405 if (!port->serial->disconnected)
406 cp2101_set_config_single(port, CP2101_UART, UART_DISABLE);
407 mutex_unlock(&port->serial->disc_mutex);
408}
409
410/*
411 * cp2101_get_termios
412 * Reads the baud rate, data bits, parity, stop bits and flow control mode
413 * from the device, corrects any unsupported values, and configures the
414 * termios structure to reflect the state of the device
415 */
416static void cp2101_get_termios (struct tty_struct *tty)
417{
418 struct usb_serial_port *port = tty->driver_data;
419 unsigned int cflag, modem_ctl[4];
420 unsigned int baud;
421 unsigned int bits;
422
423 dbg("%s - port %d", __func__, port->number);
424
425 cp2101_get_config(port, CP2101_BAUDRATE, &baud, 2);
426 /* Convert to baudrate */
427 if (baud)
428 baud = cp2101_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
429
430 dbg("%s - baud rate = %d", __func__, baud);
431
432 tty_encode_baud_rate(tty, baud, baud);
433 cflag = tty->termios->c_cflag;
434
435 cp2101_get_config(port, CP2101_BITS, &bits, 2);
436 cflag &= ~CSIZE;
437 switch (bits & BITS_DATA_MASK) {
438 case BITS_DATA_5:
439 dbg("%s - data bits = 5", __func__);
440 cflag |= CS5;
441 break;
442 case BITS_DATA_6:
443 dbg("%s - data bits = 6", __func__);
444 cflag |= CS6;
445 break;
446 case BITS_DATA_7:
447 dbg("%s - data bits = 7", __func__);
448 cflag |= CS7;
449 break;
450 case BITS_DATA_8:
451 dbg("%s - data bits = 8", __func__);
452 cflag |= CS8;
453 break;
454 case BITS_DATA_9:
455 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
456 __func__);
457 cflag |= CS8;
458 bits &= ~BITS_DATA_MASK;
459 bits |= BITS_DATA_8;
460 cp2101_set_config(port, CP2101_BITS, &bits, 2);
461 break;
462 default:
463 dbg("%s - Unknown number of data bits, using 8", __func__);
464 cflag |= CS8;
465 bits &= ~BITS_DATA_MASK;
466 bits |= BITS_DATA_8;
467 cp2101_set_config(port, CP2101_BITS, &bits, 2);
468 break;
469 }
470
471 switch (bits & BITS_PARITY_MASK) {
472 case BITS_PARITY_NONE:
473 dbg("%s - parity = NONE", __func__);
474 cflag &= ~PARENB;
475 break;
476 case BITS_PARITY_ODD:
477 dbg("%s - parity = ODD", __func__);
478 cflag |= (PARENB|PARODD);
479 break;
480 case BITS_PARITY_EVEN:
481 dbg("%s - parity = EVEN", __func__);
482 cflag &= ~PARODD;
483 cflag |= PARENB;
484 break;
485 case BITS_PARITY_MARK:
486 dbg("%s - parity = MARK (not supported, disabling parity)",
487 __func__);
488 cflag &= ~PARENB;
489 bits &= ~BITS_PARITY_MASK;
490 cp2101_set_config(port, CP2101_BITS, &bits, 2);
491 break;
492 case BITS_PARITY_SPACE:
493 dbg("%s - parity = SPACE (not supported, disabling parity)",
494 __func__);
495 cflag &= ~PARENB;
496 bits &= ~BITS_PARITY_MASK;
497 cp2101_set_config(port, CP2101_BITS, &bits, 2);
498 break;
499 default:
500 dbg("%s - Unknown parity mode, disabling parity", __func__);
501 cflag &= ~PARENB;
502 bits &= ~BITS_PARITY_MASK;
503 cp2101_set_config(port, CP2101_BITS, &bits, 2);
504 break;
505 }
506
507 cflag &= ~CSTOPB;
508 switch (bits & BITS_STOP_MASK) {
509 case BITS_STOP_1:
510 dbg("%s - stop bits = 1", __func__);
511 break;
512 case BITS_STOP_1_5:
513 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
514 __func__);
515 bits &= ~BITS_STOP_MASK;
516 cp2101_set_config(port, CP2101_BITS, &bits, 2);
517 break;
518 case BITS_STOP_2:
519 dbg("%s - stop bits = 2", __func__);
520 cflag |= CSTOPB;
521 break;
522 default:
523 dbg("%s - Unknown number of stop bits, using 1 stop bit",
524 __func__);
525 bits &= ~BITS_STOP_MASK;
526 cp2101_set_config(port, CP2101_BITS, &bits, 2);
527 break;
528 }
529
530 cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16);
531 if (modem_ctl[0] & 0x0008) {
532 dbg("%s - flow control = CRTSCTS", __func__);
533 cflag |= CRTSCTS;
534 } else {
535 dbg("%s - flow control = NONE", __func__);
536 cflag &= ~CRTSCTS;
537 }
538
539 tty->termios->c_cflag = cflag;
540}
541
542static void cp2101_set_termios(struct tty_struct *tty,
543 struct usb_serial_port *port, struct ktermios *old_termios)
544{
545 unsigned int cflag, old_cflag;
546 unsigned int baud = 0, bits;
547 unsigned int modem_ctl[4];
548
549 dbg("%s - port %d", __func__, port->number);
550
551 if (!tty)
552 return;
553
554 tty->termios->c_cflag &= ~CMSPAR;
555 cflag = tty->termios->c_cflag;
556 old_cflag = old_termios->c_cflag;
557 baud = cp2101_quantise_baudrate(tty_get_baud_rate(tty));
558
559 /* If the baud rate is to be updated*/
560 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
561 dbg("%s - Setting baud rate to %d baud", __func__,
562 baud);
563 if (cp2101_set_config_single(port, CP2101_BAUDRATE,
564 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
565 dbg("Baud rate requested not supported by device\n");
566 baud = tty_termios_baud_rate(old_termios);
567 }
568 }
569 /* Report back the resulting baud rate */
570 tty_encode_baud_rate(tty, baud, baud);
571
572 /* If the number of data bits is to be updated */
573 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
574 cp2101_get_config(port, CP2101_BITS, &bits, 2);
575 bits &= ~BITS_DATA_MASK;
576 switch (cflag & CSIZE) {
577 case CS5:
578 bits |= BITS_DATA_5;
579 dbg("%s - data bits = 5", __func__);
580 break;
581 case CS6:
582 bits |= BITS_DATA_6;
583 dbg("%s - data bits = 6", __func__);
584 break;
585 case CS7:
586 bits |= BITS_DATA_7;
587 dbg("%s - data bits = 7", __func__);
588 break;
589 case CS8:
590 bits |= BITS_DATA_8;
591 dbg("%s - data bits = 8", __func__);
592 break;
593 /*case CS9:
594 bits |= BITS_DATA_9;
595 dbg("%s - data bits = 9", __func__);
596 break;*/
597 default:
598 dbg("cp2101 driver does not "
599 "support the number of bits requested,"
600 " using 8 bit mode\n");
601 bits |= BITS_DATA_8;
602 break;
603 }
604 if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
605 dbg("Number of data bits requested "
606 "not supported by device\n");
607 }
608
609 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
610 cp2101_get_config(port, CP2101_BITS, &bits, 2);
611 bits &= ~BITS_PARITY_MASK;
612 if (cflag & PARENB) {
613 if (cflag & PARODD) {
614 bits |= BITS_PARITY_ODD;
615 dbg("%s - parity = ODD", __func__);
616 } else {
617 bits |= BITS_PARITY_EVEN;
618 dbg("%s - parity = EVEN", __func__);
619 }
620 }
621 if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
622 dbg("Parity mode not supported "
623 "by device\n");
624 }
625
626 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
627 cp2101_get_config(port, CP2101_BITS, &bits, 2);
628 bits &= ~BITS_STOP_MASK;
629 if (cflag & CSTOPB) {
630 bits |= BITS_STOP_2;
631 dbg("%s - stop bits = 2", __func__);
632 } else {
633 bits |= BITS_STOP_1;
634 dbg("%s - stop bits = 1", __func__);
635 }
636 if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
637 dbg("Number of stop bits requested "
638 "not supported by device\n");
639 }
640
641 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
642 cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16);
643 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
644 __func__, modem_ctl[0], modem_ctl[1],
645 modem_ctl[2], modem_ctl[3]);
646
647 if (cflag & CRTSCTS) {
648 modem_ctl[0] &= ~0x7B;
649 modem_ctl[0] |= 0x09;
650 modem_ctl[1] = 0x80;
651 dbg("%s - flow control = CRTSCTS", __func__);
652 } else {
653 modem_ctl[0] &= ~0x7B;
654 modem_ctl[0] |= 0x01;
655 modem_ctl[1] |= 0x40;
656 dbg("%s - flow control = NONE", __func__);
657 }
658
659 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
660 __func__, modem_ctl[0], modem_ctl[1],
661 modem_ctl[2], modem_ctl[3]);
662 cp2101_set_config(port, CP2101_MODEMCTL, modem_ctl, 16);
663 }
664
665}
666
667static int cp2101_tiocmset (struct tty_struct *tty, struct file *file,
668 unsigned int set, unsigned int clear)
669{
670 struct usb_serial_port *port = tty->driver_data;
671 unsigned int control = 0;
672
673 dbg("%s - port %d", __func__, port->number);
674
675 if (set & TIOCM_RTS) {
676 control |= CONTROL_RTS;
677 control |= CONTROL_WRITE_RTS;
678 }
679 if (set & TIOCM_DTR) {
680 control |= CONTROL_DTR;
681 control |= CONTROL_WRITE_DTR;
682 }
683 if (clear & TIOCM_RTS) {
684 control &= ~CONTROL_RTS;
685 control |= CONTROL_WRITE_RTS;
686 }
687 if (clear & TIOCM_DTR) {
688 control &= ~CONTROL_DTR;
689 control |= CONTROL_WRITE_DTR;
690 }
691
692 dbg("%s - control = 0x%.4x", __func__, control);
693
694 return cp2101_set_config(port, CP2101_CONTROL, &control, 2);
695
696}
697
698static int cp2101_tiocmget (struct tty_struct *tty, struct file *file)
699{
700 struct usb_serial_port *port = tty->driver_data;
701 unsigned int control;
702 int result;
703
704 dbg("%s - port %d", __func__, port->number);
705
706 cp2101_get_config(port, CP2101_CONTROL, &control, 1);
707
708 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
709 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
710 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
711 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
712 |((control & CONTROL_RING)? TIOCM_RI : 0)
713 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
714
715 dbg("%s - control = 0x%.2x", __func__, control);
716
717 return result;
718}
719
720static void cp2101_break_ctl (struct tty_struct *tty, int break_state)
721{
722 struct usb_serial_port *port = tty->driver_data;
723 unsigned int state;
724
725 dbg("%s - port %d", __func__, port->number);
726 if (break_state == 0)
727 state = BREAK_OFF;
728 else
729 state = BREAK_ON;
730 dbg("%s - turning break %s", __func__,
731 state == BREAK_OFF ? "off" : "on");
732 cp2101_set_config(port, CP2101_BREAK, &state, 2);
733}
734
735static int cp2101_startup(struct usb_serial *serial)
736{
737 /* CP2101 buffers behave strangely unless device is reset */
738 usb_reset_device(serial->dev);
739 return 0;
740}
741
742static void cp2101_shutdown(struct usb_serial *serial)
743{
744 int i;
745
746 dbg("%s", __func__);
747
748 /* Stop reads and writes on all ports */
749 for (i = 0; i < serial->num_ports; ++i)
750 cp2101_cleanup(serial->port[i]);
751}
752
753static int __init cp2101_init(void)
754{
755 int retval;
756
757 retval = usb_serial_register(&cp2101_device);
758 if (retval)
759 return retval; /* Failed to register */
760
761 retval = usb_register(&cp2101_driver);
762 if (retval) {
763 /* Failed to register */
764 usb_serial_deregister(&cp2101_device);
765 return retval;
766 }
767
768 /* Success */
769 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
770 DRIVER_DESC "\n");
771 return 0;
772}
773
774static void __exit cp2101_exit(void)
775{
776 usb_deregister(&cp2101_driver);
777 usb_serial_deregister(&cp2101_device);
778}
779
780module_init(cp2101_init);
781module_exit(cp2101_exit);
782
783MODULE_DESCRIPTION(DRIVER_DESC);
784MODULE_VERSION(DRIVER_VERSION);
785MODULE_LICENSE("GPL");
786
787module_param(debug, bool, S_IRUGO | S_IWUSR);
788MODULE_PARM_DESC(debug, "Enable verbose debugging messages");
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-14 14:18:59 -0500