tty: remove dtr/rts use from the driver open methods
[linux-2.6/mini2440.git] / drivers / usb / serial / cp210x.c
blobb5275c4a8eedf8bb6408943c5eb3f0fa38d9870d
1 /*
2 * Silicon Laboratories CP210x USB to RS232 serial adaptor driver
4 * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
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.
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
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>
28 * Version Information
30 #define DRIVER_VERSION "v0.09"
31 #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
34 * Function Prototypes
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 *);
55 static int debug;
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 { } /* Terminating Entry */
120 MODULE_DEVICE_TABLE(usb, id_table);
122 static struct usb_driver cp210x_driver = {
123 .name = "cp210x",
124 .probe = usb_serial_probe,
125 .disconnect = usb_serial_disconnect,
126 .id_table = id_table,
127 .no_dynamic_id = 1,
130 static struct usb_serial_driver cp210x_device = {
131 .driver = {
132 .owner = THIS_MODULE,
133 .name = "cp210x",
135 .usb_driver = &cp210x_driver,
136 .id_table = id_table,
137 .num_ports = 1,
138 .open = cp210x_open,
139 .close = cp210x_close,
140 .break_ctl = cp210x_break_ctl,
141 .set_termios = cp210x_set_termios,
142 .tiocmget = cp210x_tiocmget,
143 .tiocmset = cp210x_tiocmset,
144 .attach = cp210x_startup,
145 .disconnect = cp210x_disconnect,
148 /* Config request types */
149 #define REQTYPE_HOST_TO_DEVICE 0x41
150 #define REQTYPE_DEVICE_TO_HOST 0xc1
152 /* Config request codes */
153 #define CP210X_IFC_ENABLE 0x00
154 #define CP210X_SET_BAUDDIV 0x01
155 #define CP210X_GET_BAUDDIV 0x02
156 #define CP210X_SET_LINE_CTL 0x03
157 #define CP210X_GET_LINE_CTL 0x04
158 #define CP210X_SET_BREAK 0x05
159 #define CP210X_IMM_CHAR 0x06
160 #define CP210X_SET_MHS 0x07
161 #define CP210X_GET_MDMSTS 0x08
162 #define CP210X_SET_XON 0x09
163 #define CP210X_SET_XOFF 0x0A
164 #define CP210X_SET_EVENTMASK 0x0B
165 #define CP210X_GET_EVENTMASK 0x0C
166 #define CP210X_SET_CHAR 0x0D
167 #define CP210X_GET_CHARS 0x0E
168 #define CP210X_GET_PROPS 0x0F
169 #define CP210X_GET_COMM_STATUS 0x10
170 #define CP210X_RESET 0x11
171 #define CP210X_PURGE 0x12
172 #define CP210X_SET_FLOW 0x13
173 #define CP210X_GET_FLOW 0x14
174 #define CP210X_EMBED_EVENTS 0x15
175 #define CP210X_GET_EVENTSTATE 0x16
176 #define CP210X_SET_CHARS 0x19
178 /* CP210X_IFC_ENABLE */
179 #define UART_ENABLE 0x0001
180 #define UART_DISABLE 0x0000
182 /* CP210X_(SET|GET)_BAUDDIV */
183 #define BAUD_RATE_GEN_FREQ 0x384000
185 /* CP210X_(SET|GET)_LINE_CTL */
186 #define BITS_DATA_MASK 0X0f00
187 #define BITS_DATA_5 0X0500
188 #define BITS_DATA_6 0X0600
189 #define BITS_DATA_7 0X0700
190 #define BITS_DATA_8 0X0800
191 #define BITS_DATA_9 0X0900
193 #define BITS_PARITY_MASK 0x00f0
194 #define BITS_PARITY_NONE 0x0000
195 #define BITS_PARITY_ODD 0x0010
196 #define BITS_PARITY_EVEN 0x0020
197 #define BITS_PARITY_MARK 0x0030
198 #define BITS_PARITY_SPACE 0x0040
200 #define BITS_STOP_MASK 0x000f
201 #define BITS_STOP_1 0x0000
202 #define BITS_STOP_1_5 0x0001
203 #define BITS_STOP_2 0x0002
205 /* CP210X_SET_BREAK */
206 #define BREAK_ON 0x0000
207 #define BREAK_OFF 0x0001
209 /* CP210X_(SET_MHS|GET_MDMSTS) */
210 #define CONTROL_DTR 0x0001
211 #define CONTROL_RTS 0x0002
212 #define CONTROL_CTS 0x0010
213 #define CONTROL_DSR 0x0020
214 #define CONTROL_RING 0x0040
215 #define CONTROL_DCD 0x0080
216 #define CONTROL_WRITE_DTR 0x0100
217 #define CONTROL_WRITE_RTS 0x0200
220 * cp210x_get_config
221 * Reads from the CP210x configuration registers
222 * 'size' is specified in bytes.
223 * 'data' is a pointer to a pre-allocated array of integers large
224 * enough to hold 'size' bytes (with 4 bytes to each integer)
226 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
227 unsigned int *data, int size)
229 struct usb_serial *serial = port->serial;
230 __le32 *buf;
231 int result, i, length;
233 /* Number of integers required to contain the array */
234 length = (((size - 1) | 3) + 1)/4;
236 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
237 if (!buf) {
238 dev_err(&port->dev, "%s - out of memory.\n", __func__);
239 return -ENOMEM;
242 /* Issue the request, attempting to read 'size' bytes */
243 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
244 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
245 0, buf, size, 300);
247 /* Convert data into an array of integers */
248 for (i = 0; i < length; i++)
249 data[i] = le32_to_cpu(buf[i]);
251 kfree(buf);
253 if (result != size) {
254 dbg("%s - Unable to send config request, "
255 "request=0x%x size=%d result=%d\n",
256 __func__, request, size, result);
257 return -EPROTO;
260 return 0;
264 * cp210x_set_config
265 * Writes to the CP210x configuration registers
266 * Values less than 16 bits wide are sent directly
267 * 'size' is specified in bytes.
269 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
270 unsigned int *data, int size)
272 struct usb_serial *serial = port->serial;
273 __le32 *buf;
274 int result, i, length;
276 /* Number of integers required to contain the array */
277 length = (((size - 1) | 3) + 1)/4;
279 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
280 if (!buf) {
281 dev_err(&port->dev, "%s - out of memory.\n",
282 __func__);
283 return -ENOMEM;
286 /* Array of integers into bytes */
287 for (i = 0; i < length; i++)
288 buf[i] = cpu_to_le32(data[i]);
290 if (size > 2) {
291 result = usb_control_msg(serial->dev,
292 usb_sndctrlpipe(serial->dev, 0),
293 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
294 0, buf, size, 300);
295 } else {
296 result = usb_control_msg(serial->dev,
297 usb_sndctrlpipe(serial->dev, 0),
298 request, REQTYPE_HOST_TO_DEVICE, data[0],
299 0, NULL, 0, 300);
302 kfree(buf);
304 if ((size > 2 && result != size) || result < 0) {
305 dbg("%s - Unable to send request, "
306 "request=0x%x size=%d result=%d\n",
307 __func__, request, size, result);
308 return -EPROTO;
311 /* Single data value */
312 result = usb_control_msg(serial->dev,
313 usb_sndctrlpipe(serial->dev, 0),
314 request, REQTYPE_HOST_TO_DEVICE, data[0],
315 0, NULL, 0, 300);
316 return 0;
320 * cp210x_set_config_single
321 * Convenience function for calling cp210x_set_config on single data values
322 * without requiring an integer pointer
324 static inline int cp210x_set_config_single(struct usb_serial_port *port,
325 u8 request, unsigned int data)
327 return cp210x_set_config(port, request, &data, 2);
331 * cp210x_quantise_baudrate
332 * Quantises the baud rate as per AN205 Table 1
334 static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
335 if (baud <= 56) baud = 0;
336 else if (baud <= 300) baud = 300;
337 else if (baud <= 600) baud = 600;
338 else if (baud <= 1200) baud = 1200;
339 else if (baud <= 1800) baud = 1800;
340 else if (baud <= 2400) baud = 2400;
341 else if (baud <= 4000) baud = 4000;
342 else if (baud <= 4803) baud = 4800;
343 else if (baud <= 7207) baud = 7200;
344 else if (baud <= 9612) baud = 9600;
345 else if (baud <= 14428) baud = 14400;
346 else if (baud <= 16062) baud = 16000;
347 else if (baud <= 19250) baud = 19200;
348 else if (baud <= 28912) baud = 28800;
349 else if (baud <= 38601) baud = 38400;
350 else if (baud <= 51558) baud = 51200;
351 else if (baud <= 56280) baud = 56000;
352 else if (baud <= 58053) baud = 57600;
353 else if (baud <= 64111) baud = 64000;
354 else if (baud <= 77608) baud = 76800;
355 else if (baud <= 117028) baud = 115200;
356 else if (baud <= 129347) baud = 128000;
357 else if (baud <= 156868) baud = 153600;
358 else if (baud <= 237832) baud = 230400;
359 else if (baud <= 254234) baud = 250000;
360 else if (baud <= 273066) baud = 256000;
361 else if (baud <= 491520) baud = 460800;
362 else if (baud <= 567138) baud = 500000;
363 else if (baud <= 670254) baud = 576000;
364 else if (baud <= 1053257) baud = 921600;
365 else if (baud <= 1474560) baud = 1228800;
366 else if (baud <= 2457600) baud = 1843200;
367 else baud = 3686400;
368 return baud;
371 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port,
372 struct file *filp)
374 struct usb_serial *serial = port->serial;
375 int result;
377 dbg("%s - port %d", __func__, port->number);
379 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
380 dev_err(&port->dev, "%s - Unable to enable UART\n",
381 __func__);
382 return -EPROTO;
385 /* Start reading from the device */
386 usb_fill_bulk_urb(port->read_urb, serial->dev,
387 usb_rcvbulkpipe(serial->dev,
388 port->bulk_in_endpointAddress),
389 port->read_urb->transfer_buffer,
390 port->read_urb->transfer_buffer_length,
391 serial->type->read_bulk_callback,
392 port);
393 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
394 if (result) {
395 dev_err(&port->dev, "%s - failed resubmitting read urb, "
396 "error %d\n", __func__, result);
397 return result;
400 /* Configure the termios structure */
401 cp210x_get_termios(tty, port);
402 return 0;
405 static void cp210x_cleanup(struct usb_serial_port *port)
407 struct usb_serial *serial = port->serial;
409 dbg("%s - port %d", __func__, port->number);
411 if (serial->dev) {
412 /* shutdown any bulk reads that might be going on */
413 if (serial->num_bulk_out)
414 usb_kill_urb(port->write_urb);
415 if (serial->num_bulk_in)
416 usb_kill_urb(port->read_urb);
420 static void cp210x_close(struct usb_serial_port *port)
422 dbg("%s - port %d", __func__, port->number);
424 /* shutdown our urbs */
425 dbg("%s - shutting down urbs", __func__);
426 usb_kill_urb(port->write_urb);
427 usb_kill_urb(port->read_urb);
429 mutex_lock(&port->serial->disc_mutex);
430 if (!port->serial->disconnected)
431 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
432 mutex_unlock(&port->serial->disc_mutex);
436 * cp210x_get_termios
437 * Reads the baud rate, data bits, parity, stop bits and flow control mode
438 * from the device, corrects any unsupported values, and configures the
439 * termios structure to reflect the state of the device
441 static void cp210x_get_termios(struct tty_struct *tty,
442 struct usb_serial_port *port)
444 unsigned int baud;
446 if (tty) {
447 cp210x_get_termios_port(tty->driver_data,
448 &tty->termios->c_cflag, &baud);
449 tty_encode_baud_rate(tty, baud, baud);
452 else {
453 unsigned int cflag;
454 cflag = 0;
455 cp210x_get_termios_port(port, &cflag, &baud);
460 * cp210x_get_termios_port
461 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
463 static void cp210x_get_termios_port(struct usb_serial_port *port,
464 unsigned int *cflagp, unsigned int *baudp)
466 unsigned int cflag, modem_ctl[4];
467 unsigned int baud;
468 unsigned int bits;
470 dbg("%s - port %d", __func__, port->number);
472 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
473 /* Convert to baudrate */
474 if (baud)
475 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
477 dbg("%s - baud rate = %d", __func__, baud);
478 *baudp = baud;
480 cflag = *cflagp;
482 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
483 cflag &= ~CSIZE;
484 switch (bits & BITS_DATA_MASK) {
485 case BITS_DATA_5:
486 dbg("%s - data bits = 5", __func__);
487 cflag |= CS5;
488 break;
489 case BITS_DATA_6:
490 dbg("%s - data bits = 6", __func__);
491 cflag |= CS6;
492 break;
493 case BITS_DATA_7:
494 dbg("%s - data bits = 7", __func__);
495 cflag |= CS7;
496 break;
497 case BITS_DATA_8:
498 dbg("%s - data bits = 8", __func__);
499 cflag |= CS8;
500 break;
501 case BITS_DATA_9:
502 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
503 __func__);
504 cflag |= CS8;
505 bits &= ~BITS_DATA_MASK;
506 bits |= BITS_DATA_8;
507 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
508 break;
509 default:
510 dbg("%s - Unknown number of data bits, using 8", __func__);
511 cflag |= CS8;
512 bits &= ~BITS_DATA_MASK;
513 bits |= BITS_DATA_8;
514 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
515 break;
518 switch (bits & BITS_PARITY_MASK) {
519 case BITS_PARITY_NONE:
520 dbg("%s - parity = NONE", __func__);
521 cflag &= ~PARENB;
522 break;
523 case BITS_PARITY_ODD:
524 dbg("%s - parity = ODD", __func__);
525 cflag |= (PARENB|PARODD);
526 break;
527 case BITS_PARITY_EVEN:
528 dbg("%s - parity = EVEN", __func__);
529 cflag &= ~PARODD;
530 cflag |= PARENB;
531 break;
532 case BITS_PARITY_MARK:
533 dbg("%s - parity = MARK (not supported, disabling parity)",
534 __func__);
535 cflag &= ~PARENB;
536 bits &= ~BITS_PARITY_MASK;
537 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
538 break;
539 case BITS_PARITY_SPACE:
540 dbg("%s - parity = SPACE (not supported, disabling parity)",
541 __func__);
542 cflag &= ~PARENB;
543 bits &= ~BITS_PARITY_MASK;
544 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
545 break;
546 default:
547 dbg("%s - Unknown parity mode, disabling parity", __func__);
548 cflag &= ~PARENB;
549 bits &= ~BITS_PARITY_MASK;
550 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
551 break;
554 cflag &= ~CSTOPB;
555 switch (bits & BITS_STOP_MASK) {
556 case BITS_STOP_1:
557 dbg("%s - stop bits = 1", __func__);
558 break;
559 case BITS_STOP_1_5:
560 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
561 __func__);
562 bits &= ~BITS_STOP_MASK;
563 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
564 break;
565 case BITS_STOP_2:
566 dbg("%s - stop bits = 2", __func__);
567 cflag |= CSTOPB;
568 break;
569 default:
570 dbg("%s - Unknown number of stop bits, using 1 stop bit",
571 __func__);
572 bits &= ~BITS_STOP_MASK;
573 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
574 break;
577 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
578 if (modem_ctl[0] & 0x0008) {
579 dbg("%s - flow control = CRTSCTS", __func__);
580 cflag |= CRTSCTS;
581 } else {
582 dbg("%s - flow control = NONE", __func__);
583 cflag &= ~CRTSCTS;
586 *cflagp = cflag;
589 static void cp210x_set_termios(struct tty_struct *tty,
590 struct usb_serial_port *port, struct ktermios *old_termios)
592 unsigned int cflag, old_cflag;
593 unsigned int baud = 0, bits;
594 unsigned int modem_ctl[4];
596 dbg("%s - port %d", __func__, port->number);
598 if (!tty)
599 return;
601 tty->termios->c_cflag &= ~CMSPAR;
602 cflag = tty->termios->c_cflag;
603 old_cflag = old_termios->c_cflag;
604 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
606 /* If the baud rate is to be updated*/
607 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
608 dbg("%s - Setting baud rate to %d baud", __func__,
609 baud);
610 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
611 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
612 dbg("Baud rate requested not supported by device\n");
613 baud = tty_termios_baud_rate(old_termios);
616 /* Report back the resulting baud rate */
617 tty_encode_baud_rate(tty, baud, baud);
619 /* If the number of data bits is to be updated */
620 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
621 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
622 bits &= ~BITS_DATA_MASK;
623 switch (cflag & CSIZE) {
624 case CS5:
625 bits |= BITS_DATA_5;
626 dbg("%s - data bits = 5", __func__);
627 break;
628 case CS6:
629 bits |= BITS_DATA_6;
630 dbg("%s - data bits = 6", __func__);
631 break;
632 case CS7:
633 bits |= BITS_DATA_7;
634 dbg("%s - data bits = 7", __func__);
635 break;
636 case CS8:
637 bits |= BITS_DATA_8;
638 dbg("%s - data bits = 8", __func__);
639 break;
640 /*case CS9:
641 bits |= BITS_DATA_9;
642 dbg("%s - data bits = 9", __func__);
643 break;*/
644 default:
645 dbg("cp210x driver does not "
646 "support the number of bits requested,"
647 " using 8 bit mode\n");
648 bits |= BITS_DATA_8;
649 break;
651 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
652 dbg("Number of data bits requested "
653 "not supported by device\n");
656 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
657 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
658 bits &= ~BITS_PARITY_MASK;
659 if (cflag & PARENB) {
660 if (cflag & PARODD) {
661 bits |= BITS_PARITY_ODD;
662 dbg("%s - parity = ODD", __func__);
663 } else {
664 bits |= BITS_PARITY_EVEN;
665 dbg("%s - parity = EVEN", __func__);
668 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
669 dbg("Parity mode not supported "
670 "by device\n");
673 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
674 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
675 bits &= ~BITS_STOP_MASK;
676 if (cflag & CSTOPB) {
677 bits |= BITS_STOP_2;
678 dbg("%s - stop bits = 2", __func__);
679 } else {
680 bits |= BITS_STOP_1;
681 dbg("%s - stop bits = 1", __func__);
683 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
684 dbg("Number of stop bits requested "
685 "not supported by device\n");
688 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
689 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
690 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
691 __func__, modem_ctl[0], modem_ctl[1],
692 modem_ctl[2], modem_ctl[3]);
694 if (cflag & CRTSCTS) {
695 modem_ctl[0] &= ~0x7B;
696 modem_ctl[0] |= 0x09;
697 modem_ctl[1] = 0x80;
698 dbg("%s - flow control = CRTSCTS", __func__);
699 } else {
700 modem_ctl[0] &= ~0x7B;
701 modem_ctl[0] |= 0x01;
702 modem_ctl[1] |= 0x40;
703 dbg("%s - flow control = NONE", __func__);
706 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
707 __func__, modem_ctl[0], modem_ctl[1],
708 modem_ctl[2], modem_ctl[3]);
709 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
714 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file,
715 unsigned int set, unsigned int clear)
717 struct usb_serial_port *port = tty->driver_data;
718 return cp210x_tiocmset_port(port, file, set, clear);
721 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file,
722 unsigned int set, unsigned int clear)
724 unsigned int control = 0;
726 dbg("%s - port %d", __func__, port->number);
728 if (set & TIOCM_RTS) {
729 control |= CONTROL_RTS;
730 control |= CONTROL_WRITE_RTS;
732 if (set & TIOCM_DTR) {
733 control |= CONTROL_DTR;
734 control |= CONTROL_WRITE_DTR;
736 if (clear & TIOCM_RTS) {
737 control &= ~CONTROL_RTS;
738 control |= CONTROL_WRITE_RTS;
740 if (clear & TIOCM_DTR) {
741 control &= ~CONTROL_DTR;
742 control |= CONTROL_WRITE_DTR;
745 dbg("%s - control = 0x%.4x", __func__, control);
747 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
750 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file)
752 struct usb_serial_port *port = tty->driver_data;
753 unsigned int control;
754 int result;
756 dbg("%s - port %d", __func__, port->number);
758 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
760 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
761 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
762 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
763 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
764 |((control & CONTROL_RING)? TIOCM_RI : 0)
765 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
767 dbg("%s - control = 0x%.2x", __func__, control);
769 return result;
772 static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
774 struct usb_serial_port *port = tty->driver_data;
775 unsigned int state;
777 dbg("%s - port %d", __func__, port->number);
778 if (break_state == 0)
779 state = BREAK_OFF;
780 else
781 state = BREAK_ON;
782 dbg("%s - turning break %s", __func__,
783 state == BREAK_OFF ? "off" : "on");
784 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
787 static int cp210x_startup(struct usb_serial *serial)
789 /* cp210x buffers behave strangely unless device is reset */
790 usb_reset_device(serial->dev);
791 return 0;
794 static void cp210x_disconnect(struct usb_serial *serial)
796 int i;
798 dbg("%s", __func__);
800 /* Stop reads and writes on all ports */
801 for (i = 0; i < serial->num_ports; ++i)
802 cp210x_cleanup(serial->port[i]);
805 static int __init cp210x_init(void)
807 int retval;
809 retval = usb_serial_register(&cp210x_device);
810 if (retval)
811 return retval; /* Failed to register */
813 retval = usb_register(&cp210x_driver);
814 if (retval) {
815 /* Failed to register */
816 usb_serial_deregister(&cp210x_device);
817 return retval;
820 /* Success */
821 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
822 DRIVER_DESC "\n");
823 return 0;
826 static void __exit cp210x_exit(void)
828 usb_deregister(&cp210x_driver);
829 usb_serial_deregister(&cp210x_device);
832 module_init(cp210x_init);
833 module_exit(cp210x_exit);
835 MODULE_DESCRIPTION(DRIVER_DESC);
836 MODULE_VERSION(DRIVER_VERSION);
837 MODULE_LICENSE("GPL");
839 module_param(debug, bool, S_IRUGO | S_IWUSR);
840 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");