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Linux 2.6.31.6
[linux-2.6/verdex.git] / drivers / usb / serial / cp210x.c
bloba69457f939085d69df216c1cfd15ac436b318355
1 /*
2 * Silicon Laboratories CP210x 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 "v0.09"
31 #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
32
33 /*
34 * Function Prototypes
35 */
36 static int cp210x_open(struct tty_struct *, struct usb_serial_port *,
37 struct file *);
38 static void cp210x_cleanup(struct usb_serial_port *);
39 static void cp210x_close(struct usb_serial_port *);
40 static void cp210x_get_termios(struct tty_struct *,
41 struct usb_serial_port *port);
42 static void cp210x_get_termios_port(struct usb_serial_port *port,
43 unsigned int *cflagp, unsigned int *baudp);
44 static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
45 struct ktermios*);
46 static int cp210x_tiocmget(struct tty_struct *, struct file *);
47 static int cp210x_tiocmset(struct tty_struct *, struct file *,
48 unsigned int, unsigned int);
49 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *,
50 unsigned int, unsigned int);
51 static void cp210x_break_ctl(struct tty_struct *, int);
52 static int cp210x_startup(struct usb_serial *);
53 static void cp210x_disconnect(struct usb_serial *);
54
55 static int debug;
56
57 static struct usb_device_id id_table [] = {
58 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
59 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
60 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
61 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
62 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
63 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
64 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
65 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
66 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
67 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
68 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
69 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
70 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
71 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
72 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
73 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
74 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
75 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
76 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
77 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
78 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
79 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
80 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
81 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
82 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
83 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
84 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
85 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
86 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
87 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
88 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
89 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
90 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
91 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
92 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
93 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
94 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
95 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
96 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */
97 { USB_DEVICE(0x10c4, 0x8293) }, /* Telegesys ETRX2USB */
98 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
99 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
100 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
101 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
102 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
103 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
104 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
105 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
106 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
107 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
108 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
109 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
110 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
111 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
112 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
113 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
114 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
115 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
116 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
117 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
118 { } /* Terminating Entry */
119 };
120
121 MODULE_DEVICE_TABLE(usb, id_table);
122
123 static struct usb_driver cp210x_driver = {
124 .name = "cp210x",
125 .probe = usb_serial_probe,
126 .disconnect = usb_serial_disconnect,
127 .id_table = id_table,
128 .no_dynamic_id = 1,
129 };
130
131 static struct usb_serial_driver cp210x_device = {
132 .driver = {
133 .owner = THIS_MODULE,
134 .name = "cp210x",
135 },
136 .usb_driver = &cp210x_driver,
137 .id_table = id_table,
138 .num_ports = 1,
139 .open = cp210x_open,
140 .close = cp210x_close,
141 .break_ctl = cp210x_break_ctl,
142 .set_termios = cp210x_set_termios,
143 .tiocmget = cp210x_tiocmget,
144 .tiocmset = cp210x_tiocmset,
145 .attach = cp210x_startup,
146 .disconnect = cp210x_disconnect,
147 };
148
149 /* Config request types */
150 #define REQTYPE_HOST_TO_DEVICE 0x41
151 #define REQTYPE_DEVICE_TO_HOST 0xc1
152
153 /* Config request codes */
154 #define CP210X_IFC_ENABLE 0x00
155 #define CP210X_SET_BAUDDIV 0x01
156 #define CP210X_GET_BAUDDIV 0x02
157 #define CP210X_SET_LINE_CTL 0x03
158 #define CP210X_GET_LINE_CTL 0x04
159 #define CP210X_SET_BREAK 0x05
160 #define CP210X_IMM_CHAR 0x06
161 #define CP210X_SET_MHS 0x07
162 #define CP210X_GET_MDMSTS 0x08
163 #define CP210X_SET_XON 0x09
164 #define CP210X_SET_XOFF 0x0A
165 #define CP210X_SET_EVENTMASK 0x0B
166 #define CP210X_GET_EVENTMASK 0x0C
167 #define CP210X_SET_CHAR 0x0D
168 #define CP210X_GET_CHARS 0x0E
169 #define CP210X_GET_PROPS 0x0F
170 #define CP210X_GET_COMM_STATUS 0x10
171 #define CP210X_RESET 0x11
172 #define CP210X_PURGE 0x12
173 #define CP210X_SET_FLOW 0x13
174 #define CP210X_GET_FLOW 0x14
175 #define CP210X_EMBED_EVENTS 0x15
176 #define CP210X_GET_EVENTSTATE 0x16
177 #define CP210X_SET_CHARS 0x19
178
179 /* CP210X_IFC_ENABLE */
180 #define UART_ENABLE 0x0001
181 #define UART_DISABLE 0x0000
182
183 /* CP210X_(SET|GET)_BAUDDIV */
184 #define BAUD_RATE_GEN_FREQ 0x384000
185
186 /* CP210X_(SET|GET)_LINE_CTL */
187 #define BITS_DATA_MASK 0X0f00
188 #define BITS_DATA_5 0X0500
189 #define BITS_DATA_6 0X0600
190 #define BITS_DATA_7 0X0700
191 #define BITS_DATA_8 0X0800
192 #define BITS_DATA_9 0X0900
193
194 #define BITS_PARITY_MASK 0x00f0
195 #define BITS_PARITY_NONE 0x0000
196 #define BITS_PARITY_ODD 0x0010
197 #define BITS_PARITY_EVEN 0x0020
198 #define BITS_PARITY_MARK 0x0030
199 #define BITS_PARITY_SPACE 0x0040
200
201 #define BITS_STOP_MASK 0x000f
202 #define BITS_STOP_1 0x0000
203 #define BITS_STOP_1_5 0x0001
204 #define BITS_STOP_2 0x0002
205
206 /* CP210X_SET_BREAK */
207 #define BREAK_ON 0x0000
208 #define BREAK_OFF 0x0001
209
210 /* CP210X_(SET_MHS|GET_MDMSTS) */
211 #define CONTROL_DTR 0x0001
212 #define CONTROL_RTS 0x0002
213 #define CONTROL_CTS 0x0010
214 #define CONTROL_DSR 0x0020
215 #define CONTROL_RING 0x0040
216 #define CONTROL_DCD 0x0080
217 #define CONTROL_WRITE_DTR 0x0100
218 #define CONTROL_WRITE_RTS 0x0200
219
220 /*
221 * cp210x_get_config
222 * Reads from the CP210x configuration registers
223 * 'size' is specified in bytes.
224 * 'data' is a pointer to a pre-allocated array of integers large
225 * enough to hold 'size' bytes (with 4 bytes to each integer)
226 */
227 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
228 unsigned int *data, int size)
229 {
230 struct usb_serial *serial = port->serial;
231 __le32 *buf;
232 int result, i, length;
233
234 /* Number of integers required to contain the array */
235 length = (((size - 1) | 3) + 1)/4;
236
237 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
238 if (!buf) {
239 dev_err(&port->dev, "%s - out of memory.\n", __func__);
240 return -ENOMEM;
241 }
242
243 /* Issue the request, attempting to read 'size' bytes */
244 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
245 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
246 0, buf, size, 300);
247
248 /* Convert data into an array of integers */
249 for (i = 0; i < length; i++)
250 data[i] = le32_to_cpu(buf[i]);
251
252 kfree(buf);
253
254 if (result != size) {
255 dbg("%s - Unable to send config request, "
256 "request=0x%x size=%d result=%d\n",
257 __func__, request, size, result);
258 return -EPROTO;
259 }
260
261 return 0;
262 }
263
264 /*
265 * cp210x_set_config
266 * Writes to the CP210x configuration registers
267 * Values less than 16 bits wide are sent directly
268 * 'size' is specified in bytes.
269 */
270 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
271 unsigned int *data, int size)
272 {
273 struct usb_serial *serial = port->serial;
274 __le32 *buf;
275 int result, i, length;
276
277 /* Number of integers required to contain the array */
278 length = (((size - 1) | 3) + 1)/4;
279
280 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
281 if (!buf) {
282 dev_err(&port->dev, "%s - out of memory.\n",
283 __func__);
284 return -ENOMEM;
285 }
286
287 /* Array of integers into bytes */
288 for (i = 0; i < length; i++)
289 buf[i] = cpu_to_le32(data[i]);
290
291 if (size > 2) {
292 result = usb_control_msg(serial->dev,
293 usb_sndctrlpipe(serial->dev, 0),
294 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
295 0, buf, size, 300);
296 } else {
297 result = usb_control_msg(serial->dev,
298 usb_sndctrlpipe(serial->dev, 0),
299 request, REQTYPE_HOST_TO_DEVICE, data[0],
300 0, NULL, 0, 300);
301 }
302
303 kfree(buf);
304
305 if ((size > 2 && result != size) || result < 0) {
306 dbg("%s - Unable to send request, "
307 "request=0x%x size=%d result=%d\n",
308 __func__, request, size, result);
309 return -EPROTO;
310 }
311
312 /* Single data value */
313 result = usb_control_msg(serial->dev,
314 usb_sndctrlpipe(serial->dev, 0),
315 request, REQTYPE_HOST_TO_DEVICE, data[0],
316 0, NULL, 0, 300);
317 return 0;
318 }
319
320 /*
321 * cp210x_set_config_single
322 * Convenience function for calling cp210x_set_config on single data values
323 * without requiring an integer pointer
324 */
325 static inline int cp210x_set_config_single(struct usb_serial_port *port,
326 u8 request, unsigned int data)
327 {
328 return cp210x_set_config(port, request, &data, 2);
329 }
330
331 /*
332 * cp210x_quantise_baudrate
333 * Quantises the baud rate as per AN205 Table 1
334 */
335 static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
336 if (baud <= 56) baud = 0;
337 else if (baud <= 300) baud = 300;
338 else if (baud <= 600) baud = 600;
339 else if (baud <= 1200) baud = 1200;
340 else if (baud <= 1800) baud = 1800;
341 else if (baud <= 2400) baud = 2400;
342 else if (baud <= 4000) baud = 4000;
343 else if (baud <= 4803) baud = 4800;
344 else if (baud <= 7207) baud = 7200;
345 else if (baud <= 9612) baud = 9600;
346 else if (baud <= 14428) baud = 14400;
347 else if (baud <= 16062) baud = 16000;
348 else if (baud <= 19250) baud = 19200;
349 else if (baud <= 28912) baud = 28800;
350 else if (baud <= 38601) baud = 38400;
351 else if (baud <= 51558) baud = 51200;
352 else if (baud <= 56280) baud = 56000;
353 else if (baud <= 58053) baud = 57600;
354 else if (baud <= 64111) baud = 64000;
355 else if (baud <= 77608) baud = 76800;
356 else if (baud <= 117028) baud = 115200;
357 else if (baud <= 129347) baud = 128000;
358 else if (baud <= 156868) baud = 153600;
359 else if (baud <= 237832) baud = 230400;
360 else if (baud <= 254234) baud = 250000;
361 else if (baud <= 273066) baud = 256000;
362 else if (baud <= 491520) baud = 460800;
363 else if (baud <= 567138) baud = 500000;
364 else if (baud <= 670254) baud = 576000;
365 else if (baud <= 1053257) baud = 921600;
366 else if (baud <= 1474560) baud = 1228800;
367 else if (baud <= 2457600) baud = 1843200;
368 else baud = 3686400;
369 return baud;
370 }
371
372 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port,
373 struct file *filp)
374 {
375 struct usb_serial *serial = port->serial;
376 int result;
377
378 dbg("%s - port %d", __func__, port->number);
379
380 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
381 dev_err(&port->dev, "%s - Unable to enable UART\n",
382 __func__);
383 return -EPROTO;
384 }
385
386 /* Start reading from the device */
387 usb_fill_bulk_urb(port->read_urb, serial->dev,
388 usb_rcvbulkpipe(serial->dev,
389 port->bulk_in_endpointAddress),
390 port->read_urb->transfer_buffer,
391 port->read_urb->transfer_buffer_length,
392 serial->type->read_bulk_callback,
393 port);
394 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
395 if (result) {
396 dev_err(&port->dev, "%s - failed resubmitting read urb, "
397 "error %d\n", __func__, result);
398 return result;
399 }
400
401 /* Configure the termios structure */
402 cp210x_get_termios(tty, port);
403 return 0;
404 }
405
406 static void cp210x_cleanup(struct usb_serial_port *port)
407 {
408 struct usb_serial *serial = port->serial;
409
410 dbg("%s - port %d", __func__, port->number);
411
412 if (serial->dev) {
413 /* shutdown any bulk reads that might be going on */
414 if (serial->num_bulk_out)
415 usb_kill_urb(port->write_urb);
416 if (serial->num_bulk_in)
417 usb_kill_urb(port->read_urb);
418 }
419 }
420
421 static void cp210x_close(struct usb_serial_port *port)
422 {
423 dbg("%s - port %d", __func__, port->number);
424
425 /* shutdown our urbs */
426 dbg("%s - shutting down urbs", __func__);
427 usb_kill_urb(port->write_urb);
428 usb_kill_urb(port->read_urb);
429
430 mutex_lock(&port->serial->disc_mutex);
431 if (!port->serial->disconnected)
432 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
433 mutex_unlock(&port->serial->disc_mutex);
434 }
435
436 /*
437 * cp210x_get_termios
438 * Reads the baud rate, data bits, parity, stop bits and flow control mode
439 * from the device, corrects any unsupported values, and configures the
440 * termios structure to reflect the state of the device
441 */
442 static void cp210x_get_termios(struct tty_struct *tty,
443 struct usb_serial_port *port)
444 {
445 unsigned int baud;
446
447 if (tty) {
448 cp210x_get_termios_port(tty->driver_data,
449 &tty->termios->c_cflag, &baud);
450 tty_encode_baud_rate(tty, baud, baud);
451 }
452
453 else {
454 unsigned int cflag;
455 cflag = 0;
456 cp210x_get_termios_port(port, &cflag, &baud);
457 }
458 }
459
460 /*
461 * cp210x_get_termios_port
462 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
463 */
464 static void cp210x_get_termios_port(struct usb_serial_port *port,
465 unsigned int *cflagp, unsigned int *baudp)
466 {
467 unsigned int cflag, modem_ctl[4];
468 unsigned int baud;
469 unsigned int bits;
470
471 dbg("%s - port %d", __func__, port->number);
472
473 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
474 /* Convert to baudrate */
475 if (baud)
476 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
477
478 dbg("%s - baud rate = %d", __func__, baud);
479 *baudp = baud;
480
481 cflag = *cflagp;
482
483 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
484 cflag &= ~CSIZE;
485 switch (bits & BITS_DATA_MASK) {
486 case BITS_DATA_5:
487 dbg("%s - data bits = 5", __func__);
488 cflag |= CS5;
489 break;
490 case BITS_DATA_6:
491 dbg("%s - data bits = 6", __func__);
492 cflag |= CS6;
493 break;
494 case BITS_DATA_7:
495 dbg("%s - data bits = 7", __func__);
496 cflag |= CS7;
497 break;
498 case BITS_DATA_8:
499 dbg("%s - data bits = 8", __func__);
500 cflag |= CS8;
501 break;
502 case BITS_DATA_9:
503 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
504 __func__);
505 cflag |= CS8;
506 bits &= ~BITS_DATA_MASK;
507 bits |= BITS_DATA_8;
508 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
509 break;
510 default:
511 dbg("%s - Unknown number of data bits, using 8", __func__);
512 cflag |= CS8;
513 bits &= ~BITS_DATA_MASK;
514 bits |= BITS_DATA_8;
515 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
516 break;
517 }
518
519 switch (bits & BITS_PARITY_MASK) {
520 case BITS_PARITY_NONE:
521 dbg("%s - parity = NONE", __func__);
522 cflag &= ~PARENB;
523 break;
524 case BITS_PARITY_ODD:
525 dbg("%s - parity = ODD", __func__);
526 cflag |= (PARENB|PARODD);
527 break;
528 case BITS_PARITY_EVEN:
529 dbg("%s - parity = EVEN", __func__);
530 cflag &= ~PARODD;
531 cflag |= PARENB;
532 break;
533 case BITS_PARITY_MARK:
534 dbg("%s - parity = MARK (not supported, disabling parity)",
535 __func__);
536 cflag &= ~PARENB;
537 bits &= ~BITS_PARITY_MASK;
538 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
539 break;
540 case BITS_PARITY_SPACE:
541 dbg("%s - parity = SPACE (not supported, disabling parity)",
542 __func__);
543 cflag &= ~PARENB;
544 bits &= ~BITS_PARITY_MASK;
545 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
546 break;
547 default:
548 dbg("%s - Unknown parity mode, disabling parity", __func__);
549 cflag &= ~PARENB;
550 bits &= ~BITS_PARITY_MASK;
551 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
552 break;
553 }
554
555 cflag &= ~CSTOPB;
556 switch (bits & BITS_STOP_MASK) {
557 case BITS_STOP_1:
558 dbg("%s - stop bits = 1", __func__);
559 break;
560 case BITS_STOP_1_5:
561 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
562 __func__);
563 bits &= ~BITS_STOP_MASK;
564 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
565 break;
566 case BITS_STOP_2:
567 dbg("%s - stop bits = 2", __func__);
568 cflag |= CSTOPB;
569 break;
570 default:
571 dbg("%s - Unknown number of stop bits, using 1 stop bit",
572 __func__);
573 bits &= ~BITS_STOP_MASK;
574 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
575 break;
576 }
577
578 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
579 if (modem_ctl[0] & 0x0008) {
580 dbg("%s - flow control = CRTSCTS", __func__);
581 cflag |= CRTSCTS;
582 } else {
583 dbg("%s - flow control = NONE", __func__);
584 cflag &= ~CRTSCTS;
585 }
586
587 *cflagp = cflag;
588 }
589
590 static void cp210x_set_termios(struct tty_struct *tty,
591 struct usb_serial_port *port, struct ktermios *old_termios)
592 {
593 unsigned int cflag, old_cflag;
594 unsigned int baud = 0, bits;
595 unsigned int modem_ctl[4];
596
597 dbg("%s - port %d", __func__, port->number);
598
599 if (!tty)
600 return;
601
602 tty->termios->c_cflag &= ~CMSPAR;
603 cflag = tty->termios->c_cflag;
604 old_cflag = old_termios->c_cflag;
605 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
606
607 /* If the baud rate is to be updated*/
608 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
609 dbg("%s - Setting baud rate to %d baud", __func__,
610 baud);
611 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
612 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
613 dbg("Baud rate requested not supported by device\n");
614 baud = tty_termios_baud_rate(old_termios);
615 }
616 }
617 /* Report back the resulting baud rate */
618 tty_encode_baud_rate(tty, baud, baud);
619
620 /* If the number of data bits is to be updated */
621 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
622 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
623 bits &= ~BITS_DATA_MASK;
624 switch (cflag & CSIZE) {
625 case CS5:
626 bits |= BITS_DATA_5;
627 dbg("%s - data bits = 5", __func__);
628 break;
629 case CS6:
630 bits |= BITS_DATA_6;
631 dbg("%s - data bits = 6", __func__);
632 break;
633 case CS7:
634 bits |= BITS_DATA_7;
635 dbg("%s - data bits = 7", __func__);
636 break;
637 case CS8:
638 bits |= BITS_DATA_8;
639 dbg("%s - data bits = 8", __func__);
640 break;
641 /*case CS9:
642 bits |= BITS_DATA_9;
643 dbg("%s - data bits = 9", __func__);
644 break;*/
645 default:
646 dbg("cp210x driver does not "
647 "support the number of bits requested,"
648 " using 8 bit mode\n");
649 bits |= BITS_DATA_8;
650 break;
651 }
652 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
653 dbg("Number of data bits requested "
654 "not supported by device\n");
655 }
656
657 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
658 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
659 bits &= ~BITS_PARITY_MASK;
660 if (cflag & PARENB) {
661 if (cflag & PARODD) {
662 bits |= BITS_PARITY_ODD;
663 dbg("%s - parity = ODD", __func__);
664 } else {
665 bits |= BITS_PARITY_EVEN;
666 dbg("%s - parity = EVEN", __func__);
667 }
668 }
669 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
670 dbg("Parity mode not supported "
671 "by device\n");
672 }
673
674 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
675 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
676 bits &= ~BITS_STOP_MASK;
677 if (cflag & CSTOPB) {
678 bits |= BITS_STOP_2;
679 dbg("%s - stop bits = 2", __func__);
680 } else {
681 bits |= BITS_STOP_1;
682 dbg("%s - stop bits = 1", __func__);
683 }
684 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
685 dbg("Number of stop bits requested "
686 "not supported by device\n");
687 }
688
689 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
690 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
691 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
692 __func__, modem_ctl[0], modem_ctl[1],
693 modem_ctl[2], modem_ctl[3]);
694
695 if (cflag & CRTSCTS) {
696 modem_ctl[0] &= ~0x7B;
697 modem_ctl[0] |= 0x09;
698 modem_ctl[1] = 0x80;
699 dbg("%s - flow control = CRTSCTS", __func__);
700 } else {
701 modem_ctl[0] &= ~0x7B;
702 modem_ctl[0] |= 0x01;
703 modem_ctl[1] |= 0x40;
704 dbg("%s - flow control = NONE", __func__);
705 }
706
707 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
708 __func__, modem_ctl[0], modem_ctl[1],
709 modem_ctl[2], modem_ctl[3]);
710 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
711 }
712
713 }
714
715 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file,
716 unsigned int set, unsigned int clear)
717 {
718 struct usb_serial_port *port = tty->driver_data;
719 return cp210x_tiocmset_port(port, file, set, clear);
720 }
721
722 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file,
723 unsigned int set, unsigned int clear)
724 {
725 unsigned int control = 0;
726
727 dbg("%s - port %d", __func__, port->number);
728
729 if (set & TIOCM_RTS) {
730 control |= CONTROL_RTS;
731 control |= CONTROL_WRITE_RTS;
732 }
733 if (set & TIOCM_DTR) {
734 control |= CONTROL_DTR;
735 control |= CONTROL_WRITE_DTR;
736 }
737 if (clear & TIOCM_RTS) {
738 control &= ~CONTROL_RTS;
739 control |= CONTROL_WRITE_RTS;
740 }
741 if (clear & TIOCM_DTR) {
742 control &= ~CONTROL_DTR;
743 control |= CONTROL_WRITE_DTR;
744 }
745
746 dbg("%s - control = 0x%.4x", __func__, control);
747
748 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
749 }
750
751 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file)
752 {
753 struct usb_serial_port *port = tty->driver_data;
754 unsigned int control;
755 int result;
756
757 dbg("%s - port %d", __func__, port->number);
758
759 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
760
761 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
762 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
763 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
764 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
765 |((control & CONTROL_RING)? TIOCM_RI : 0)
766 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
767
768 dbg("%s - control = 0x%.2x", __func__, control);
769
770 return result;
771 }
772
773 static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
774 {
775 struct usb_serial_port *port = tty->driver_data;
776 unsigned int state;
777
778 dbg("%s - port %d", __func__, port->number);
779 if (break_state == 0)
780 state = BREAK_OFF;
781 else
782 state = BREAK_ON;
783 dbg("%s - turning break %s", __func__,
784 state == BREAK_OFF ? "off" : "on");
785 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
786 }
787
788 static int cp210x_startup(struct usb_serial *serial)
789 {
790 /* cp210x buffers behave strangely unless device is reset */
791 usb_reset_device(serial->dev);
792 return 0;
793 }
794
795 static void cp210x_disconnect(struct usb_serial *serial)
796 {
797 int i;
798
799 dbg("%s", __func__);
800
801 /* Stop reads and writes on all ports */
802 for (i = 0; i < serial->num_ports; ++i)
803 cp210x_cleanup(serial->port[i]);
804 }
805
806 static int __init cp210x_init(void)
807 {
808 int retval;
809
810 retval = usb_serial_register(&cp210x_device);
811 if (retval)
812 return retval; /* Failed to register */
813
814 retval = usb_register(&cp210x_driver);
815 if (retval) {
816 /* Failed to register */
817 usb_serial_deregister(&cp210x_device);
818 return retval;
819 }
820
821 /* Success */
822 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
823 DRIVER_DESC "\n");
824 return 0;
825 }
826
827 static void __exit cp210x_exit(void)
828 {
829 usb_deregister(&cp210x_driver);
830 usb_serial_deregister(&cp210x_device);
831 }
832
833 module_init(cp210x_init);
834 module_exit(cp210x_exit);
835
836 MODULE_DESCRIPTION(DRIVER_DESC);
837 MODULE_VERSION(DRIVER_VERSION);
838 MODULE_LICENSE("GPL");
839
840 module_param(debug, bool, S_IRUGO | S_IWUSR);
841 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");
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