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USB: cp210x: remove redundant disconnect()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / usb / serial / cp210x.c
blob25e343ff61e78ed3ae73937f7104b08cc4fc2bed
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_close(struct usb_serial_port *);
38 static void cp210x_get_termios(struct tty_struct *,
39 struct usb_serial_port *port);
40 static void cp210x_get_termios_port(struct usb_serial_port *port,
41 unsigned int *cflagp, unsigned int *baudp);
42 static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
43 struct ktermios*);
44 static int cp210x_tiocmget(struct tty_struct *, struct file *);
45 static int cp210x_tiocmset(struct tty_struct *, struct file *,
46 unsigned int, unsigned int);
47 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *,
48 unsigned int, unsigned int);
49 static void cp210x_break_ctl(struct tty_struct *, int);
50 static int cp210x_startup(struct usb_serial *);
51 static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
52 static int cp210x_carrier_raised(struct usb_serial_port *p);
53
54 static int debug;
55
56 static const struct usb_device_id id_table[] = {
57 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
58 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
59 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
60 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
61 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
62 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
63 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
64 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
65 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
66 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
67 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
68 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
69 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
70 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
71 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
72 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
73 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
74 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
75 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
76 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
77 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
78 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
79 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
80 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
81 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
82 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
83 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
84 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
85 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
86 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
87 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
88 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
89 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
90 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
91 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
92 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
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 .bulk_in_size = 256,
140 .bulk_out_size = 256,
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 .dtr_rts = cp210x_dtr_rts,
149 .carrier_raised = cp210x_carrier_raised
150 };
151
152 /* Config request types */
153 #define REQTYPE_HOST_TO_DEVICE 0x41
154 #define REQTYPE_DEVICE_TO_HOST 0xc1
155
156 /* Config request codes */
157 #define CP210X_IFC_ENABLE 0x00
158 #define CP210X_SET_BAUDDIV 0x01
159 #define CP210X_GET_BAUDDIV 0x02
160 #define CP210X_SET_LINE_CTL 0x03
161 #define CP210X_GET_LINE_CTL 0x04
162 #define CP210X_SET_BREAK 0x05
163 #define CP210X_IMM_CHAR 0x06
164 #define CP210X_SET_MHS 0x07
165 #define CP210X_GET_MDMSTS 0x08
166 #define CP210X_SET_XON 0x09
167 #define CP210X_SET_XOFF 0x0A
168 #define CP210X_SET_EVENTMASK 0x0B
169 #define CP210X_GET_EVENTMASK 0x0C
170 #define CP210X_SET_CHAR 0x0D
171 #define CP210X_GET_CHARS 0x0E
172 #define CP210X_GET_PROPS 0x0F
173 #define CP210X_GET_COMM_STATUS 0x10
174 #define CP210X_RESET 0x11
175 #define CP210X_PURGE 0x12
176 #define CP210X_SET_FLOW 0x13
177 #define CP210X_GET_FLOW 0x14
178 #define CP210X_EMBED_EVENTS 0x15
179 #define CP210X_GET_EVENTSTATE 0x16
180 #define CP210X_SET_CHARS 0x19
181
182 /* CP210X_IFC_ENABLE */
183 #define UART_ENABLE 0x0001
184 #define UART_DISABLE 0x0000
185
186 /* CP210X_(SET|GET)_BAUDDIV */
187 #define BAUD_RATE_GEN_FREQ 0x384000
188
189 /* CP210X_(SET|GET)_LINE_CTL */
190 #define BITS_DATA_MASK 0X0f00
191 #define BITS_DATA_5 0X0500
192 #define BITS_DATA_6 0X0600
193 #define BITS_DATA_7 0X0700
194 #define BITS_DATA_8 0X0800
195 #define BITS_DATA_9 0X0900
196
197 #define BITS_PARITY_MASK 0x00f0
198 #define BITS_PARITY_NONE 0x0000
199 #define BITS_PARITY_ODD 0x0010
200 #define BITS_PARITY_EVEN 0x0020
201 #define BITS_PARITY_MARK 0x0030
202 #define BITS_PARITY_SPACE 0x0040
203
204 #define BITS_STOP_MASK 0x000f
205 #define BITS_STOP_1 0x0000
206 #define BITS_STOP_1_5 0x0001
207 #define BITS_STOP_2 0x0002
208
209 /* CP210X_SET_BREAK */
210 #define BREAK_ON 0x0000
211 #define BREAK_OFF 0x0001
212
213 /* CP210X_(SET_MHS|GET_MDMSTS) */
214 #define CONTROL_DTR 0x0001
215 #define CONTROL_RTS 0x0002
216 #define CONTROL_CTS 0x0010
217 #define CONTROL_DSR 0x0020
218 #define CONTROL_RING 0x0040
219 #define CONTROL_DCD 0x0080
220 #define CONTROL_WRITE_DTR 0x0100
221 #define CONTROL_WRITE_RTS 0x0200
222
223 /*
224 * cp210x_get_config
225 * Reads from the CP210x configuration registers
226 * 'size' is specified in bytes.
227 * 'data' is a pointer to a pre-allocated array of integers large
228 * enough to hold 'size' bytes (with 4 bytes to each integer)
229 */
230 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
231 unsigned int *data, int size)
232 {
233 struct usb_serial *serial = port->serial;
234 __le32 *buf;
235 int result, i, length;
236
237 /* Number of integers required to contain the array */
238 length = (((size - 1) | 3) + 1)/4;
239
240 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
241 if (!buf) {
242 dev_err(&port->dev, "%s - out of memory.\n", __func__);
243 return -ENOMEM;
244 }
245
246 /* Issue the request, attempting to read 'size' bytes */
247 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
248 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
249 0, buf, size, 300);
250
251 /* Convert data into an array of integers */
252 for (i = 0; i < length; i++)
253 data[i] = le32_to_cpu(buf[i]);
254
255 kfree(buf);
256
257 if (result != size) {
258 dbg("%s - Unable to send config request, "
259 "request=0x%x size=%d result=%d\n",
260 __func__, request, size, result);
261 return -EPROTO;
262 }
263
264 return 0;
265 }
266
267 /*
268 * cp210x_set_config
269 * Writes to the CP210x configuration registers
270 * Values less than 16 bits wide are sent directly
271 * 'size' is specified in bytes.
272 */
273 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
274 unsigned int *data, int size)
275 {
276 struct usb_serial *serial = port->serial;
277 __le32 *buf;
278 int result, i, length;
279
280 /* Number of integers required to contain the array */
281 length = (((size - 1) | 3) + 1)/4;
282
283 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
284 if (!buf) {
285 dev_err(&port->dev, "%s - out of memory.\n",
286 __func__);
287 return -ENOMEM;
288 }
289
290 /* Array of integers into bytes */
291 for (i = 0; i < length; i++)
292 buf[i] = cpu_to_le32(data[i]);
293
294 if (size > 2) {
295 result = usb_control_msg(serial->dev,
296 usb_sndctrlpipe(serial->dev, 0),
297 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
298 0, buf, size, 300);
299 } else {
300 result = usb_control_msg(serial->dev,
301 usb_sndctrlpipe(serial->dev, 0),
302 request, REQTYPE_HOST_TO_DEVICE, data[0],
303 0, NULL, 0, 300);
304 }
305
306 kfree(buf);
307
308 if ((size > 2 && result != size) || result < 0) {
309 dbg("%s - Unable to send request, "
310 "request=0x%x size=%d result=%d\n",
311 __func__, request, size, result);
312 return -EPROTO;
313 }
314
315 return 0;
316 }
317
318 /*
319 * cp210x_set_config_single
320 * Convenience function for calling cp210x_set_config on single data values
321 * without requiring an integer pointer
322 */
323 static inline int cp210x_set_config_single(struct usb_serial_port *port,
324 u8 request, unsigned int data)
325 {
326 return cp210x_set_config(port, request, &data, 2);
327 }
328
329 /*
330 * cp210x_quantise_baudrate
331 * Quantises the baud rate as per AN205 Table 1
332 */
333 static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
334 if (baud <= 56) baud = 0;
335 else if (baud <= 300) baud = 300;
336 else if (baud <= 600) baud = 600;
337 else if (baud <= 1200) baud = 1200;
338 else if (baud <= 1800) baud = 1800;
339 else if (baud <= 2400) baud = 2400;
340 else if (baud <= 4000) baud = 4000;
341 else if (baud <= 4803) baud = 4800;
342 else if (baud <= 7207) baud = 7200;
343 else if (baud <= 9612) baud = 9600;
344 else if (baud <= 14428) baud = 14400;
345 else if (baud <= 16062) baud = 16000;
346 else if (baud <= 19250) baud = 19200;
347 else if (baud <= 28912) baud = 28800;
348 else if (baud <= 38601) baud = 38400;
349 else if (baud <= 51558) baud = 51200;
350 else if (baud <= 56280) baud = 56000;
351 else if (baud <= 58053) baud = 57600;
352 else if (baud <= 64111) baud = 64000;
353 else if (baud <= 77608) baud = 76800;
354 else if (baud <= 117028) baud = 115200;
355 else if (baud <= 129347) baud = 128000;
356 else if (baud <= 156868) baud = 153600;
357 else if (baud <= 237832) baud = 230400;
358 else if (baud <= 254234) baud = 250000;
359 else if (baud <= 273066) baud = 256000;
360 else if (baud <= 491520) baud = 460800;
361 else if (baud <= 567138) baud = 500000;
362 else if (baud <= 670254) baud = 576000;
363 else if (baud <= 1053257) baud = 921600;
364 else if (baud <= 1474560) baud = 1228800;
365 else if (baud <= 2457600) baud = 1843200;
366 else baud = 3686400;
367 return baud;
368 }
369
370 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
371 {
372 int result;
373
374 dbg("%s - port %d", __func__, port->number);
375
376 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
377 dev_err(&port->dev, "%s - Unable to enable UART\n",
378 __func__);
379 return -EPROTO;
380 }
381
382 result = usb_serial_generic_submit_read_urb(port, GFP_KERNEL);
383 if (result)
384 return result;
385
386 /* Configure the termios structure */
387 cp210x_get_termios(tty, port);
388 return 0;
389 }
390
391 static void cp210x_close(struct usb_serial_port *port)
392 {
393 dbg("%s - port %d", __func__, port->number);
394
395 usb_serial_generic_close(port);
396
397 mutex_lock(&port->serial->disc_mutex);
398 if (!port->serial->disconnected)
399 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
400 mutex_unlock(&port->serial->disc_mutex);
401 }
402
403 /*
404 * cp210x_get_termios
405 * Reads the baud rate, data bits, parity, stop bits and flow control mode
406 * from the device, corrects any unsupported values, and configures the
407 * termios structure to reflect the state of the device
408 */
409 static void cp210x_get_termios(struct tty_struct *tty,
410 struct usb_serial_port *port)
411 {
412 unsigned int baud;
413
414 if (tty) {
415 cp210x_get_termios_port(tty->driver_data,
416 &tty->termios->c_cflag, &baud);
417 tty_encode_baud_rate(tty, baud, baud);
418 }
419
420 else {
421 unsigned int cflag;
422 cflag = 0;
423 cp210x_get_termios_port(port, &cflag, &baud);
424 }
425 }
426
427 /*
428 * cp210x_get_termios_port
429 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
430 */
431 static void cp210x_get_termios_port(struct usb_serial_port *port,
432 unsigned int *cflagp, unsigned int *baudp)
433 {
434 unsigned int cflag, modem_ctl[4];
435 unsigned int baud;
436 unsigned int bits;
437
438 dbg("%s - port %d", __func__, port->number);
439
440 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
441 /* Convert to baudrate */
442 if (baud)
443 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
444
445 dbg("%s - baud rate = %d", __func__, baud);
446 *baudp = baud;
447
448 cflag = *cflagp;
449
450 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
451 cflag &= ~CSIZE;
452 switch (bits & BITS_DATA_MASK) {
453 case BITS_DATA_5:
454 dbg("%s - data bits = 5", __func__);
455 cflag |= CS5;
456 break;
457 case BITS_DATA_6:
458 dbg("%s - data bits = 6", __func__);
459 cflag |= CS6;
460 break;
461 case BITS_DATA_7:
462 dbg("%s - data bits = 7", __func__);
463 cflag |= CS7;
464 break;
465 case BITS_DATA_8:
466 dbg("%s - data bits = 8", __func__);
467 cflag |= CS8;
468 break;
469 case BITS_DATA_9:
470 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
471 __func__);
472 cflag |= CS8;
473 bits &= ~BITS_DATA_MASK;
474 bits |= BITS_DATA_8;
475 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
476 break;
477 default:
478 dbg("%s - Unknown number of data bits, using 8", __func__);
479 cflag |= CS8;
480 bits &= ~BITS_DATA_MASK;
481 bits |= BITS_DATA_8;
482 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
483 break;
484 }
485
486 switch (bits & BITS_PARITY_MASK) {
487 case BITS_PARITY_NONE:
488 dbg("%s - parity = NONE", __func__);
489 cflag &= ~PARENB;
490 break;
491 case BITS_PARITY_ODD:
492 dbg("%s - parity = ODD", __func__);
493 cflag |= (PARENB|PARODD);
494 break;
495 case BITS_PARITY_EVEN:
496 dbg("%s - parity = EVEN", __func__);
497 cflag &= ~PARODD;
498 cflag |= PARENB;
499 break;
500 case BITS_PARITY_MARK:
501 dbg("%s - parity = MARK (not supported, disabling parity)",
502 __func__);
503 cflag &= ~PARENB;
504 bits &= ~BITS_PARITY_MASK;
505 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
506 break;
507 case BITS_PARITY_SPACE:
508 dbg("%s - parity = SPACE (not supported, disabling parity)",
509 __func__);
510 cflag &= ~PARENB;
511 bits &= ~BITS_PARITY_MASK;
512 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
513 break;
514 default:
515 dbg("%s - Unknown parity mode, disabling parity", __func__);
516 cflag &= ~PARENB;
517 bits &= ~BITS_PARITY_MASK;
518 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
519 break;
520 }
521
522 cflag &= ~CSTOPB;
523 switch (bits & BITS_STOP_MASK) {
524 case BITS_STOP_1:
525 dbg("%s - stop bits = 1", __func__);
526 break;
527 case BITS_STOP_1_5:
528 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
529 __func__);
530 bits &= ~BITS_STOP_MASK;
531 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
532 break;
533 case BITS_STOP_2:
534 dbg("%s - stop bits = 2", __func__);
535 cflag |= CSTOPB;
536 break;
537 default:
538 dbg("%s - Unknown number of stop bits, using 1 stop bit",
539 __func__);
540 bits &= ~BITS_STOP_MASK;
541 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
542 break;
543 }
544
545 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
546 if (modem_ctl[0] & 0x0008) {
547 dbg("%s - flow control = CRTSCTS", __func__);
548 cflag |= CRTSCTS;
549 } else {
550 dbg("%s - flow control = NONE", __func__);
551 cflag &= ~CRTSCTS;
552 }
553
554 *cflagp = cflag;
555 }
556
557 static void cp210x_set_termios(struct tty_struct *tty,
558 struct usb_serial_port *port, struct ktermios *old_termios)
559 {
560 unsigned int cflag, old_cflag;
561 unsigned int baud = 0, bits;
562 unsigned int modem_ctl[4];
563
564 dbg("%s - port %d", __func__, port->number);
565
566 if (!tty)
567 return;
568
569 tty->termios->c_cflag &= ~CMSPAR;
570 cflag = tty->termios->c_cflag;
571 old_cflag = old_termios->c_cflag;
572 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
573
574 /* If the baud rate is to be updated*/
575 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
576 dbg("%s - Setting baud rate to %d baud", __func__,
577 baud);
578 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
579 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
580 dbg("Baud rate requested not supported by device");
581 baud = tty_termios_baud_rate(old_termios);
582 }
583 }
584 /* Report back the resulting baud rate */
585 tty_encode_baud_rate(tty, baud, baud);
586
587 /* If the number of data bits is to be updated */
588 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
589 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
590 bits &= ~BITS_DATA_MASK;
591 switch (cflag & CSIZE) {
592 case CS5:
593 bits |= BITS_DATA_5;
594 dbg("%s - data bits = 5", __func__);
595 break;
596 case CS6:
597 bits |= BITS_DATA_6;
598 dbg("%s - data bits = 6", __func__);
599 break;
600 case CS7:
601 bits |= BITS_DATA_7;
602 dbg("%s - data bits = 7", __func__);
603 break;
604 case CS8:
605 bits |= BITS_DATA_8;
606 dbg("%s - data bits = 8", __func__);
607 break;
608 /*case CS9:
609 bits |= BITS_DATA_9;
610 dbg("%s - data bits = 9", __func__);
611 break;*/
612 default:
613 dbg("cp210x driver does not "
614 "support the number of bits requested,"
615 " using 8 bit mode\n");
616 bits |= BITS_DATA_8;
617 break;
618 }
619 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
620 dbg("Number of data bits requested "
621 "not supported by device\n");
622 }
623
624 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
625 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
626 bits &= ~BITS_PARITY_MASK;
627 if (cflag & PARENB) {
628 if (cflag & PARODD) {
629 bits |= BITS_PARITY_ODD;
630 dbg("%s - parity = ODD", __func__);
631 } else {
632 bits |= BITS_PARITY_EVEN;
633 dbg("%s - parity = EVEN", __func__);
634 }
635 }
636 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
637 dbg("Parity mode not supported "
638 "by device\n");
639 }
640
641 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
642 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
643 bits &= ~BITS_STOP_MASK;
644 if (cflag & CSTOPB) {
645 bits |= BITS_STOP_2;
646 dbg("%s - stop bits = 2", __func__);
647 } else {
648 bits |= BITS_STOP_1;
649 dbg("%s - stop bits = 1", __func__);
650 }
651 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
652 dbg("Number of stop bits requested "
653 "not supported by device\n");
654 }
655
656 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
657 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
658 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
659 __func__, modem_ctl[0], modem_ctl[1],
660 modem_ctl[2], modem_ctl[3]);
661
662 if (cflag & CRTSCTS) {
663 modem_ctl[0] &= ~0x7B;
664 modem_ctl[0] |= 0x09;
665 modem_ctl[1] = 0x80;
666 dbg("%s - flow control = CRTSCTS", __func__);
667 } else {
668 modem_ctl[0] &= ~0x7B;
669 modem_ctl[0] |= 0x01;
670 modem_ctl[1] |= 0x40;
671 dbg("%s - flow control = NONE", __func__);
672 }
673
674 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
675 __func__, modem_ctl[0], modem_ctl[1],
676 modem_ctl[2], modem_ctl[3]);
677 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
678 }
679
680 }
681
682 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file,
683 unsigned int set, unsigned int clear)
684 {
685 struct usb_serial_port *port = tty->driver_data;
686 return cp210x_tiocmset_port(port, file, set, clear);
687 }
688
689 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file,
690 unsigned int set, unsigned int clear)
691 {
692 unsigned int control = 0;
693
694 dbg("%s - port %d", __func__, port->number);
695
696 if (set & TIOCM_RTS) {
697 control |= CONTROL_RTS;
698 control |= CONTROL_WRITE_RTS;
699 }
700 if (set & TIOCM_DTR) {
701 control |= CONTROL_DTR;
702 control |= CONTROL_WRITE_DTR;
703 }
704 if (clear & TIOCM_RTS) {
705 control &= ~CONTROL_RTS;
706 control |= CONTROL_WRITE_RTS;
707 }
708 if (clear & TIOCM_DTR) {
709 control &= ~CONTROL_DTR;
710 control |= CONTROL_WRITE_DTR;
711 }
712
713 dbg("%s - control = 0x%.4x", __func__, control);
714
715 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
716 }
717
718 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
719 {
720 if (on)
721 cp210x_tiocmset_port(p, NULL, TIOCM_DTR|TIOCM_RTS, 0);
722 else
723 cp210x_tiocmset_port(p, NULL, 0, TIOCM_DTR|TIOCM_RTS);
724 }
725
726 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file)
727 {
728 struct usb_serial_port *port = tty->driver_data;
729 unsigned int control;
730 int result;
731
732 dbg("%s - port %d", __func__, port->number);
733
734 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
735
736 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
737 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
738 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
739 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
740 |((control & CONTROL_RING)? TIOCM_RI : 0)
741 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
742
743 dbg("%s - control = 0x%.2x", __func__, control);
744
745 return result;
746 }
747
748 static int cp210x_carrier_raised(struct usb_serial_port *p)
749 {
750 unsigned int control;
751 cp210x_get_config(p, CP210X_GET_MDMSTS, &control, 1);
752 if (control & CONTROL_DCD)
753 return 1;
754 return 0;
755 }
756
757 static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
758 {
759 struct usb_serial_port *port = tty->driver_data;
760 unsigned int state;
761
762 dbg("%s - port %d", __func__, port->number);
763 if (break_state == 0)
764 state = BREAK_OFF;
765 else
766 state = BREAK_ON;
767 dbg("%s - turning break %s", __func__,
768 state == BREAK_OFF ? "off" : "on");
769 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
770 }
771
772 static int cp210x_startup(struct usb_serial *serial)
773 {
774 /* cp210x buffers behave strangely unless device is reset */
775 usb_reset_device(serial->dev);
776 return 0;
777 }
778
779 static int __init cp210x_init(void)
780 {
781 int retval;
782
783 retval = usb_serial_register(&cp210x_device);
784 if (retval)
785 return retval; /* Failed to register */
786
787 retval = usb_register(&cp210x_driver);
788 if (retval) {
789 /* Failed to register */
790 usb_serial_deregister(&cp210x_device);
791 return retval;
792 }
793
794 /* Success */
795 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
796 DRIVER_DESC "\n");
797 return 0;
798 }
799
800 static void __exit cp210x_exit(void)
801 {
802 usb_deregister(&cp210x_driver);
803 usb_serial_deregister(&cp210x_device);
804 }
805
806 module_init(cp210x_init);
807 module_exit(cp210x_exit);
808
809 MODULE_DESCRIPTION(DRIVER_DESC);
810 MODULE_VERSION(DRIVER_VERSION);
811 MODULE_LICENSE("GPL");
812
813 module_param(debug, bool, S_IRUGO | S_IWUSR);
814 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree