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USB: cp210x: Add 81E8 (Zephyr Bioharness)
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / usb / serial / cp210x.c
blob507382b0a9ed1d377330344c62024fbd8e661d9d
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 *tty, struct usb_serial_port *);
37 static void cp210x_cleanup(struct usb_serial_port *);
38 static void cp210x_close(struct usb_serial_port *);
39 static void cp210x_get_termios(struct tty_struct *,
40 struct usb_serial_port *port);
41 static void cp210x_get_termios_port(struct usb_serial_port *port,
42 unsigned int *cflagp, unsigned int *baudp);
43 static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
44 struct ktermios*);
45 static int cp210x_tiocmget(struct tty_struct *, struct file *);
46 static int cp210x_tiocmset(struct tty_struct *, struct file *,
47 unsigned int, unsigned int);
48 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *,
49 unsigned int, unsigned int);
50 static void cp210x_break_ctl(struct tty_struct *, int);
51 static int cp210x_startup(struct usb_serial *);
52 static void cp210x_disconnect(struct usb_serial *);
53 static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
54 static int cp210x_carrier_raised(struct usb_serial_port *p);
55
56 static int debug;
57
58 static const struct usb_device_id id_table[] = {
59 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
60 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
61 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
62 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
63 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
64 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
65 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
66 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
67 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
68 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
69 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
70 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
71 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
72 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
73 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
74 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
75 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
76 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
77 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
78 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
79 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
80 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
81 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
82 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
83 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
84 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
85 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
86 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
87 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
88 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
89 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
90 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
91 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
92 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
93 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
94 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
95 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
96 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
97 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
98 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */
99 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesys ETRX2USB */
100 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
101 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
102 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
103 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
104 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
105 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
106 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
107 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
108 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
109 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
110 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
111 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
112 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
113 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
114 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
115 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
116 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
117 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
118 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
119 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
120 { } /* Terminating Entry */
121 };
122
123 MODULE_DEVICE_TABLE(usb, id_table);
124
125 static struct usb_driver cp210x_driver = {
126 .name = "cp210x",
127 .probe = usb_serial_probe,
128 .disconnect = usb_serial_disconnect,
129 .id_table = id_table,
130 .no_dynamic_id = 1,
131 };
132
133 static struct usb_serial_driver cp210x_device = {
134 .driver = {
135 .owner = THIS_MODULE,
136 .name = "cp210x",
137 },
138 .usb_driver = &cp210x_driver,
139 .id_table = id_table,
140 .num_ports = 1,
141 .open = cp210x_open,
142 .close = cp210x_close,
143 .break_ctl = cp210x_break_ctl,
144 .set_termios = cp210x_set_termios,
145 .tiocmget = cp210x_tiocmget,
146 .tiocmset = cp210x_tiocmset,
147 .attach = cp210x_startup,
148 .disconnect = cp210x_disconnect,
149 .dtr_rts = cp210x_dtr_rts,
150 .carrier_raised = cp210x_carrier_raised
151 };
152
153 /* Config request types */
154 #define REQTYPE_HOST_TO_DEVICE 0x41
155 #define REQTYPE_DEVICE_TO_HOST 0xc1
156
157 /* Config request codes */
158 #define CP210X_IFC_ENABLE 0x00
159 #define CP210X_SET_BAUDDIV 0x01
160 #define CP210X_GET_BAUDDIV 0x02
161 #define CP210X_SET_LINE_CTL 0x03
162 #define CP210X_GET_LINE_CTL 0x04
163 #define CP210X_SET_BREAK 0x05
164 #define CP210X_IMM_CHAR 0x06
165 #define CP210X_SET_MHS 0x07
166 #define CP210X_GET_MDMSTS 0x08
167 #define CP210X_SET_XON 0x09
168 #define CP210X_SET_XOFF 0x0A
169 #define CP210X_SET_EVENTMASK 0x0B
170 #define CP210X_GET_EVENTMASK 0x0C
171 #define CP210X_SET_CHAR 0x0D
172 #define CP210X_GET_CHARS 0x0E
173 #define CP210X_GET_PROPS 0x0F
174 #define CP210X_GET_COMM_STATUS 0x10
175 #define CP210X_RESET 0x11
176 #define CP210X_PURGE 0x12
177 #define CP210X_SET_FLOW 0x13
178 #define CP210X_GET_FLOW 0x14
179 #define CP210X_EMBED_EVENTS 0x15
180 #define CP210X_GET_EVENTSTATE 0x16
181 #define CP210X_SET_CHARS 0x19
182
183 /* CP210X_IFC_ENABLE */
184 #define UART_ENABLE 0x0001
185 #define UART_DISABLE 0x0000
186
187 /* CP210X_(SET|GET)_BAUDDIV */
188 #define BAUD_RATE_GEN_FREQ 0x384000
189
190 /* CP210X_(SET|GET)_LINE_CTL */
191 #define BITS_DATA_MASK 0X0f00
192 #define BITS_DATA_5 0X0500
193 #define BITS_DATA_6 0X0600
194 #define BITS_DATA_7 0X0700
195 #define BITS_DATA_8 0X0800
196 #define BITS_DATA_9 0X0900
197
198 #define BITS_PARITY_MASK 0x00f0
199 #define BITS_PARITY_NONE 0x0000
200 #define BITS_PARITY_ODD 0x0010
201 #define BITS_PARITY_EVEN 0x0020
202 #define BITS_PARITY_MARK 0x0030
203 #define BITS_PARITY_SPACE 0x0040
204
205 #define BITS_STOP_MASK 0x000f
206 #define BITS_STOP_1 0x0000
207 #define BITS_STOP_1_5 0x0001
208 #define BITS_STOP_2 0x0002
209
210 /* CP210X_SET_BREAK */
211 #define BREAK_ON 0x0000
212 #define BREAK_OFF 0x0001
213
214 /* CP210X_(SET_MHS|GET_MDMSTS) */
215 #define CONTROL_DTR 0x0001
216 #define CONTROL_RTS 0x0002
217 #define CONTROL_CTS 0x0010
218 #define CONTROL_DSR 0x0020
219 #define CONTROL_RING 0x0040
220 #define CONTROL_DCD 0x0080
221 #define CONTROL_WRITE_DTR 0x0100
222 #define CONTROL_WRITE_RTS 0x0200
223
224 /*
225 * cp210x_get_config
226 * Reads from the CP210x configuration registers
227 * 'size' is specified in bytes.
228 * 'data' is a pointer to a pre-allocated array of integers large
229 * enough to hold 'size' bytes (with 4 bytes to each integer)
230 */
231 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
232 unsigned int *data, int size)
233 {
234 struct usb_serial *serial = port->serial;
235 __le32 *buf;
236 int result, i, length;
237
238 /* Number of integers required to contain the array */
239 length = (((size - 1) | 3) + 1)/4;
240
241 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
242 if (!buf) {
243 dev_err(&port->dev, "%s - out of memory.\n", __func__);
244 return -ENOMEM;
245 }
246
247 /* Issue the request, attempting to read 'size' bytes */
248 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
249 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
250 0, buf, size, 300);
251
252 /* Convert data into an array of integers */
253 for (i = 0; i < length; i++)
254 data[i] = le32_to_cpu(buf[i]);
255
256 kfree(buf);
257
258 if (result != size) {
259 dbg("%s - Unable to send config request, "
260 "request=0x%x size=%d result=%d\n",
261 __func__, request, size, result);
262 return -EPROTO;
263 }
264
265 return 0;
266 }
267
268 /*
269 * cp210x_set_config
270 * Writes to the CP210x configuration registers
271 * Values less than 16 bits wide are sent directly
272 * 'size' is specified in bytes.
273 */
274 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
275 unsigned int *data, int size)
276 {
277 struct usb_serial *serial = port->serial;
278 __le32 *buf;
279 int result, i, length;
280
281 /* Number of integers required to contain the array */
282 length = (((size - 1) | 3) + 1)/4;
283
284 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
285 if (!buf) {
286 dev_err(&port->dev, "%s - out of memory.\n",
287 __func__);
288 return -ENOMEM;
289 }
290
291 /* Array of integers into bytes */
292 for (i = 0; i < length; i++)
293 buf[i] = cpu_to_le32(data[i]);
294
295 if (size > 2) {
296 result = usb_control_msg(serial->dev,
297 usb_sndctrlpipe(serial->dev, 0),
298 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
299 0, buf, size, 300);
300 } else {
301 result = usb_control_msg(serial->dev,
302 usb_sndctrlpipe(serial->dev, 0),
303 request, REQTYPE_HOST_TO_DEVICE, data[0],
304 0, NULL, 0, 300);
305 }
306
307 kfree(buf);
308
309 if ((size > 2 && result != size) || result < 0) {
310 dbg("%s - Unable to send request, "
311 "request=0x%x size=%d result=%d\n",
312 __func__, request, size, result);
313 return -EPROTO;
314 }
315
316 /* Single data value */
317 result = usb_control_msg(serial->dev,
318 usb_sndctrlpipe(serial->dev, 0),
319 request, REQTYPE_HOST_TO_DEVICE, data[0],
320 0, NULL, 0, 300);
321 return 0;
322 }
323
324 /*
325 * cp210x_set_config_single
326 * Convenience function for calling cp210x_set_config on single data values
327 * without requiring an integer pointer
328 */
329 static inline int cp210x_set_config_single(struct usb_serial_port *port,
330 u8 request, unsigned int data)
331 {
332 return cp210x_set_config(port, request, &data, 2);
333 }
334
335 /*
336 * cp210x_quantise_baudrate
337 * Quantises the baud rate as per AN205 Table 1
338 */
339 static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
340 if (baud <= 56) baud = 0;
341 else if (baud <= 300) baud = 300;
342 else if (baud <= 600) baud = 600;
343 else if (baud <= 1200) baud = 1200;
344 else if (baud <= 1800) baud = 1800;
345 else if (baud <= 2400) baud = 2400;
346 else if (baud <= 4000) baud = 4000;
347 else if (baud <= 4803) baud = 4800;
348 else if (baud <= 7207) baud = 7200;
349 else if (baud <= 9612) baud = 9600;
350 else if (baud <= 14428) baud = 14400;
351 else if (baud <= 16062) baud = 16000;
352 else if (baud <= 19250) baud = 19200;
353 else if (baud <= 28912) baud = 28800;
354 else if (baud <= 38601) baud = 38400;
355 else if (baud <= 51558) baud = 51200;
356 else if (baud <= 56280) baud = 56000;
357 else if (baud <= 58053) baud = 57600;
358 else if (baud <= 64111) baud = 64000;
359 else if (baud <= 77608) baud = 76800;
360 else if (baud <= 117028) baud = 115200;
361 else if (baud <= 129347) baud = 128000;
362 else if (baud <= 156868) baud = 153600;
363 else if (baud <= 237832) baud = 230400;
364 else if (baud <= 254234) baud = 250000;
365 else if (baud <= 273066) baud = 256000;
366 else if (baud <= 491520) baud = 460800;
367 else if (baud <= 567138) baud = 500000;
368 else if (baud <= 670254) baud = 576000;
369 else if (baud <= 1053257) baud = 921600;
370 else if (baud <= 1474560) baud = 1228800;
371 else if (baud <= 2457600) baud = 1843200;
372 else baud = 3686400;
373 return baud;
374 }
375
376 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
377 {
378 struct usb_serial *serial = port->serial;
379 int result;
380
381 dbg("%s - port %d", __func__, port->number);
382
383 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
384 dev_err(&port->dev, "%s - Unable to enable UART\n",
385 __func__);
386 return -EPROTO;
387 }
388
389 /* Start reading from the device */
390 usb_fill_bulk_urb(port->read_urb, serial->dev,
391 usb_rcvbulkpipe(serial->dev,
392 port->bulk_in_endpointAddress),
393 port->read_urb->transfer_buffer,
394 port->read_urb->transfer_buffer_length,
395 serial->type->read_bulk_callback,
396 port);
397 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
398 if (result) {
399 dev_err(&port->dev, "%s - failed resubmitting read urb, "
400 "error %d\n", __func__, result);
401 return result;
402 }
403
404 /* Configure the termios structure */
405 cp210x_get_termios(tty, port);
406 return 0;
407 }
408
409 static void cp210x_cleanup(struct usb_serial_port *port)
410 {
411 struct usb_serial *serial = port->serial;
412
413 dbg("%s - port %d", __func__, port->number);
414
415 if (serial->dev) {
416 /* shutdown any bulk reads that might be going on */
417 if (serial->num_bulk_out)
418 usb_kill_urb(port->write_urb);
419 if (serial->num_bulk_in)
420 usb_kill_urb(port->read_urb);
421 }
422 }
423
424 static void cp210x_close(struct usb_serial_port *port)
425 {
426 dbg("%s - port %d", __func__, port->number);
427
428 /* shutdown our urbs */
429 dbg("%s - shutting down urbs", __func__);
430 usb_kill_urb(port->write_urb);
431 usb_kill_urb(port->read_urb);
432
433 mutex_lock(&port->serial->disc_mutex);
434 if (!port->serial->disconnected)
435 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
436 mutex_unlock(&port->serial->disc_mutex);
437 }
438
439 /*
440 * cp210x_get_termios
441 * Reads the baud rate, data bits, parity, stop bits and flow control mode
442 * from the device, corrects any unsupported values, and configures the
443 * termios structure to reflect the state of the device
444 */
445 static void cp210x_get_termios(struct tty_struct *tty,
446 struct usb_serial_port *port)
447 {
448 unsigned int baud;
449
450 if (tty) {
451 cp210x_get_termios_port(tty->driver_data,
452 &tty->termios->c_cflag, &baud);
453 tty_encode_baud_rate(tty, baud, baud);
454 }
455
456 else {
457 unsigned int cflag;
458 cflag = 0;
459 cp210x_get_termios_port(port, &cflag, &baud);
460 }
461 }
462
463 /*
464 * cp210x_get_termios_port
465 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
466 */
467 static void cp210x_get_termios_port(struct usb_serial_port *port,
468 unsigned int *cflagp, unsigned int *baudp)
469 {
470 unsigned int cflag, modem_ctl[4];
471 unsigned int baud;
472 unsigned int bits;
473
474 dbg("%s - port %d", __func__, port->number);
475
476 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
477 /* Convert to baudrate */
478 if (baud)
479 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
480
481 dbg("%s - baud rate = %d", __func__, baud);
482 *baudp = baud;
483
484 cflag = *cflagp;
485
486 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
487 cflag &= ~CSIZE;
488 switch (bits & BITS_DATA_MASK) {
489 case BITS_DATA_5:
490 dbg("%s - data bits = 5", __func__);
491 cflag |= CS5;
492 break;
493 case BITS_DATA_6:
494 dbg("%s - data bits = 6", __func__);
495 cflag |= CS6;
496 break;
497 case BITS_DATA_7:
498 dbg("%s - data bits = 7", __func__);
499 cflag |= CS7;
500 break;
501 case BITS_DATA_8:
502 dbg("%s - data bits = 8", __func__);
503 cflag |= CS8;
504 break;
505 case BITS_DATA_9:
506 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
507 __func__);
508 cflag |= CS8;
509 bits &= ~BITS_DATA_MASK;
510 bits |= BITS_DATA_8;
511 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
512 break;
513 default:
514 dbg("%s - Unknown number of data bits, using 8", __func__);
515 cflag |= CS8;
516 bits &= ~BITS_DATA_MASK;
517 bits |= BITS_DATA_8;
518 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
519 break;
520 }
521
522 switch (bits & BITS_PARITY_MASK) {
523 case BITS_PARITY_NONE:
524 dbg("%s - parity = NONE", __func__);
525 cflag &= ~PARENB;
526 break;
527 case BITS_PARITY_ODD:
528 dbg("%s - parity = ODD", __func__);
529 cflag |= (PARENB|PARODD);
530 break;
531 case BITS_PARITY_EVEN:
532 dbg("%s - parity = EVEN", __func__);
533 cflag &= ~PARODD;
534 cflag |= PARENB;
535 break;
536 case BITS_PARITY_MARK:
537 dbg("%s - parity = MARK (not supported, disabling parity)",
538 __func__);
539 cflag &= ~PARENB;
540 bits &= ~BITS_PARITY_MASK;
541 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
542 break;
543 case BITS_PARITY_SPACE:
544 dbg("%s - parity = SPACE (not supported, disabling parity)",
545 __func__);
546 cflag &= ~PARENB;
547 bits &= ~BITS_PARITY_MASK;
548 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
549 break;
550 default:
551 dbg("%s - Unknown parity mode, disabling parity", __func__);
552 cflag &= ~PARENB;
553 bits &= ~BITS_PARITY_MASK;
554 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
555 break;
556 }
557
558 cflag &= ~CSTOPB;
559 switch (bits & BITS_STOP_MASK) {
560 case BITS_STOP_1:
561 dbg("%s - stop bits = 1", __func__);
562 break;
563 case BITS_STOP_1_5:
564 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
565 __func__);
566 bits &= ~BITS_STOP_MASK;
567 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
568 break;
569 case BITS_STOP_2:
570 dbg("%s - stop bits = 2", __func__);
571 cflag |= CSTOPB;
572 break;
573 default:
574 dbg("%s - Unknown number of stop bits, using 1 stop bit",
575 __func__);
576 bits &= ~BITS_STOP_MASK;
577 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
578 break;
579 }
580
581 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
582 if (modem_ctl[0] & 0x0008) {
583 dbg("%s - flow control = CRTSCTS", __func__);
584 cflag |= CRTSCTS;
585 } else {
586 dbg("%s - flow control = NONE", __func__);
587 cflag &= ~CRTSCTS;
588 }
589
590 *cflagp = cflag;
591 }
592
593 static void cp210x_set_termios(struct tty_struct *tty,
594 struct usb_serial_port *port, struct ktermios *old_termios)
595 {
596 unsigned int cflag, old_cflag;
597 unsigned int baud = 0, bits;
598 unsigned int modem_ctl[4];
599
600 dbg("%s - port %d", __func__, port->number);
601
602 if (!tty)
603 return;
604
605 tty->termios->c_cflag &= ~CMSPAR;
606 cflag = tty->termios->c_cflag;
607 old_cflag = old_termios->c_cflag;
608 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
609
610 /* If the baud rate is to be updated*/
611 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
612 dbg("%s - Setting baud rate to %d baud", __func__,
613 baud);
614 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
615 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
616 dbg("Baud rate requested not supported by device");
617 baud = tty_termios_baud_rate(old_termios);
618 }
619 }
620 /* Report back the resulting baud rate */
621 tty_encode_baud_rate(tty, baud, baud);
622
623 /* If the number of data bits is to be updated */
624 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
625 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
626 bits &= ~BITS_DATA_MASK;
627 switch (cflag & CSIZE) {
628 case CS5:
629 bits |= BITS_DATA_5;
630 dbg("%s - data bits = 5", __func__);
631 break;
632 case CS6:
633 bits |= BITS_DATA_6;
634 dbg("%s - data bits = 6", __func__);
635 break;
636 case CS7:
637 bits |= BITS_DATA_7;
638 dbg("%s - data bits = 7", __func__);
639 break;
640 case CS8:
641 bits |= BITS_DATA_8;
642 dbg("%s - data bits = 8", __func__);
643 break;
644 /*case CS9:
645 bits |= BITS_DATA_9;
646 dbg("%s - data bits = 9", __func__);
647 break;*/
648 default:
649 dbg("cp210x driver does not "
650 "support the number of bits requested,"
651 " using 8 bit mode\n");
652 bits |= BITS_DATA_8;
653 break;
654 }
655 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
656 dbg("Number of data bits requested "
657 "not supported by device\n");
658 }
659
660 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
661 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
662 bits &= ~BITS_PARITY_MASK;
663 if (cflag & PARENB) {
664 if (cflag & PARODD) {
665 bits |= BITS_PARITY_ODD;
666 dbg("%s - parity = ODD", __func__);
667 } else {
668 bits |= BITS_PARITY_EVEN;
669 dbg("%s - parity = EVEN", __func__);
670 }
671 }
672 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
673 dbg("Parity mode not supported "
674 "by device\n");
675 }
676
677 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
678 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
679 bits &= ~BITS_STOP_MASK;
680 if (cflag & CSTOPB) {
681 bits |= BITS_STOP_2;
682 dbg("%s - stop bits = 2", __func__);
683 } else {
684 bits |= BITS_STOP_1;
685 dbg("%s - stop bits = 1", __func__);
686 }
687 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
688 dbg("Number of stop bits requested "
689 "not supported by device\n");
690 }
691
692 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
693 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
694 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
695 __func__, modem_ctl[0], modem_ctl[1],
696 modem_ctl[2], modem_ctl[3]);
697
698 if (cflag & CRTSCTS) {
699 modem_ctl[0] &= ~0x7B;
700 modem_ctl[0] |= 0x09;
701 modem_ctl[1] = 0x80;
702 dbg("%s - flow control = CRTSCTS", __func__);
703 } else {
704 modem_ctl[0] &= ~0x7B;
705 modem_ctl[0] |= 0x01;
706 modem_ctl[1] |= 0x40;
707 dbg("%s - flow control = NONE", __func__);
708 }
709
710 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
711 __func__, modem_ctl[0], modem_ctl[1],
712 modem_ctl[2], modem_ctl[3]);
713 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
714 }
715
716 }
717
718 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file,
719 unsigned int set, unsigned int clear)
720 {
721 struct usb_serial_port *port = tty->driver_data;
722 return cp210x_tiocmset_port(port, file, set, clear);
723 }
724
725 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file,
726 unsigned int set, unsigned int clear)
727 {
728 unsigned int control = 0;
729
730 dbg("%s - port %d", __func__, port->number);
731
732 if (set & TIOCM_RTS) {
733 control |= CONTROL_RTS;
734 control |= CONTROL_WRITE_RTS;
735 }
736 if (set & TIOCM_DTR) {
737 control |= CONTROL_DTR;
738 control |= CONTROL_WRITE_DTR;
739 }
740 if (clear & TIOCM_RTS) {
741 control &= ~CONTROL_RTS;
742 control |= CONTROL_WRITE_RTS;
743 }
744 if (clear & TIOCM_DTR) {
745 control &= ~CONTROL_DTR;
746 control |= CONTROL_WRITE_DTR;
747 }
748
749 dbg("%s - control = 0x%.4x", __func__, control);
750
751 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
752 }
753
754 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
755 {
756 if (on)
757 cp210x_tiocmset_port(p, NULL, TIOCM_DTR|TIOCM_RTS, 0);
758 else
759 cp210x_tiocmset_port(p, NULL, 0, TIOCM_DTR|TIOCM_RTS);
760 }
761
762 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file)
763 {
764 struct usb_serial_port *port = tty->driver_data;
765 unsigned int control;
766 int result;
767
768 dbg("%s - port %d", __func__, port->number);
769
770 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
771
772 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
773 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
774 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
775 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
776 |((control & CONTROL_RING)? TIOCM_RI : 0)
777 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
778
779 dbg("%s - control = 0x%.2x", __func__, control);
780
781 return result;
782 }
783
784 static int cp210x_carrier_raised(struct usb_serial_port *p)
785 {
786 unsigned int control;
787 cp210x_get_config(p, CP210X_GET_MDMSTS, &control, 1);
788 if (control & CONTROL_DCD)
789 return 1;
790 return 0;
791 }
792
793 static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
794 {
795 struct usb_serial_port *port = tty->driver_data;
796 unsigned int state;
797
798 dbg("%s - port %d", __func__, port->number);
799 if (break_state == 0)
800 state = BREAK_OFF;
801 else
802 state = BREAK_ON;
803 dbg("%s - turning break %s", __func__,
804 state == BREAK_OFF ? "off" : "on");
805 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
806 }
807
808 static int cp210x_startup(struct usb_serial *serial)
809 {
810 /* cp210x buffers behave strangely unless device is reset */
811 usb_reset_device(serial->dev);
812 return 0;
813 }
814
815 static void cp210x_disconnect(struct usb_serial *serial)
816 {
817 int i;
818
819 dbg("%s", __func__);
820
821 /* Stop reads and writes on all ports */
822 for (i = 0; i < serial->num_ports; ++i)
823 cp210x_cleanup(serial->port[i]);
824 }
825
826 static int __init cp210x_init(void)
827 {
828 int retval;
829
830 retval = usb_serial_register(&cp210x_device);
831 if (retval)
832 return retval; /* Failed to register */
833
834 retval = usb_register(&cp210x_driver);
835 if (retval) {
836 /* Failed to register */
837 usb_serial_deregister(&cp210x_device);
838 return retval;
839 }
840
841 /* Success */
842 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
843 DRIVER_DESC "\n");
844 return 0;
845 }
846
847 static void __exit cp210x_exit(void)
848 {
849 usb_deregister(&cp210x_driver);
850 usb_serial_deregister(&cp210x_device);
851 }
852
853 module_init(cp210x_init);
854 module_exit(cp210x_exit);
855
856 MODULE_DESCRIPTION(DRIVER_DESC);
857 MODULE_VERSION(DRIVER_VERSION);
858 MODULE_LICENSE("GPL");
859
860 module_param(debug, bool, S_IRUGO | S_IWUSR);
861 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree