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USB: CP210x New Device IDs 11 New device IDs
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / usb / serial / cp210x.c
blob8b8c7976b4c00df62592bba7c8b4567029fb52bf
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(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
63 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
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, 0x8044) }, /* Cygnal Debug Adapter */
76 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
77 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
78 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
79 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
80 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
81 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
82 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
83 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
84 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
85 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
86 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
87 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
88 { USB_DEVICE(0x10C4, 0x8149) }, /* West Mountain Radio Computerized Battery Analyzer */
89 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
90 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
91 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
92 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
93 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
94 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
95 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
96 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
97 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
98 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
99 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
100 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
101 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
102 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
103 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
104 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */
105 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesys ETRX2USB */
106 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
107 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
108 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
109 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
110 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
111 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
112 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
113 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
114 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
115 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
116 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
117 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
118 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
119 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
120 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
121 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
122 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
123 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
124 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
125 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
126 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
127 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
128 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
129 { } /* Terminating Entry */
130 };
131
132 MODULE_DEVICE_TABLE(usb, id_table);
133
134 static struct usb_driver cp210x_driver = {
135 .name = "cp210x",
136 .probe = usb_serial_probe,
137 .disconnect = usb_serial_disconnect,
138 .id_table = id_table,
139 .no_dynamic_id = 1,
140 };
141
142 static struct usb_serial_driver cp210x_device = {
143 .driver = {
144 .owner = THIS_MODULE,
145 .name = "cp210x",
146 },
147 .usb_driver = &cp210x_driver,
148 .id_table = id_table,
149 .num_ports = 1,
150 .bulk_in_size = 256,
151 .bulk_out_size = 256,
152 .open = cp210x_open,
153 .close = cp210x_close,
154 .break_ctl = cp210x_break_ctl,
155 .set_termios = cp210x_set_termios,
156 .tiocmget = cp210x_tiocmget,
157 .tiocmset = cp210x_tiocmset,
158 .attach = cp210x_startup,
159 .dtr_rts = cp210x_dtr_rts,
160 .carrier_raised = cp210x_carrier_raised
161 };
162
163 /* Config request types */
164 #define REQTYPE_HOST_TO_DEVICE 0x41
165 #define REQTYPE_DEVICE_TO_HOST 0xc1
166
167 /* Config request codes */
168 #define CP210X_IFC_ENABLE 0x00
169 #define CP210X_SET_BAUDDIV 0x01
170 #define CP210X_GET_BAUDDIV 0x02
171 #define CP210X_SET_LINE_CTL 0x03
172 #define CP210X_GET_LINE_CTL 0x04
173 #define CP210X_SET_BREAK 0x05
174 #define CP210X_IMM_CHAR 0x06
175 #define CP210X_SET_MHS 0x07
176 #define CP210X_GET_MDMSTS 0x08
177 #define CP210X_SET_XON 0x09
178 #define CP210X_SET_XOFF 0x0A
179 #define CP210X_SET_EVENTMASK 0x0B
180 #define CP210X_GET_EVENTMASK 0x0C
181 #define CP210X_SET_CHAR 0x0D
182 #define CP210X_GET_CHARS 0x0E
183 #define CP210X_GET_PROPS 0x0F
184 #define CP210X_GET_COMM_STATUS 0x10
185 #define CP210X_RESET 0x11
186 #define CP210X_PURGE 0x12
187 #define CP210X_SET_FLOW 0x13
188 #define CP210X_GET_FLOW 0x14
189 #define CP210X_EMBED_EVENTS 0x15
190 #define CP210X_GET_EVENTSTATE 0x16
191 #define CP210X_SET_CHARS 0x19
192
193 /* CP210X_IFC_ENABLE */
194 #define UART_ENABLE 0x0001
195 #define UART_DISABLE 0x0000
196
197 /* CP210X_(SET|GET)_BAUDDIV */
198 #define BAUD_RATE_GEN_FREQ 0x384000
199
200 /* CP210X_(SET|GET)_LINE_CTL */
201 #define BITS_DATA_MASK 0X0f00
202 #define BITS_DATA_5 0X0500
203 #define BITS_DATA_6 0X0600
204 #define BITS_DATA_7 0X0700
205 #define BITS_DATA_8 0X0800
206 #define BITS_DATA_9 0X0900
207
208 #define BITS_PARITY_MASK 0x00f0
209 #define BITS_PARITY_NONE 0x0000
210 #define BITS_PARITY_ODD 0x0010
211 #define BITS_PARITY_EVEN 0x0020
212 #define BITS_PARITY_MARK 0x0030
213 #define BITS_PARITY_SPACE 0x0040
214
215 #define BITS_STOP_MASK 0x000f
216 #define BITS_STOP_1 0x0000
217 #define BITS_STOP_1_5 0x0001
218 #define BITS_STOP_2 0x0002
219
220 /* CP210X_SET_BREAK */
221 #define BREAK_ON 0x0000
222 #define BREAK_OFF 0x0001
223
224 /* CP210X_(SET_MHS|GET_MDMSTS) */
225 #define CONTROL_DTR 0x0001
226 #define CONTROL_RTS 0x0002
227 #define CONTROL_CTS 0x0010
228 #define CONTROL_DSR 0x0020
229 #define CONTROL_RING 0x0040
230 #define CONTROL_DCD 0x0080
231 #define CONTROL_WRITE_DTR 0x0100
232 #define CONTROL_WRITE_RTS 0x0200
233
234 /*
235 * cp210x_get_config
236 * Reads from the CP210x configuration registers
237 * 'size' is specified in bytes.
238 * 'data' is a pointer to a pre-allocated array of integers large
239 * enough to hold 'size' bytes (with 4 bytes to each integer)
240 */
241 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
242 unsigned int *data, int size)
243 {
244 struct usb_serial *serial = port->serial;
245 __le32 *buf;
246 int result, i, length;
247
248 /* Number of integers required to contain the array */
249 length = (((size - 1) | 3) + 1)/4;
250
251 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
252 if (!buf) {
253 dev_err(&port->dev, "%s - out of memory.\n", __func__);
254 return -ENOMEM;
255 }
256
257 /* Issue the request, attempting to read 'size' bytes */
258 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
259 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
260 0, buf, size, 300);
261
262 /* Convert data into an array of integers */
263 for (i = 0; i < length; i++)
264 data[i] = le32_to_cpu(buf[i]);
265
266 kfree(buf);
267
268 if (result != size) {
269 dbg("%s - Unable to send config request, "
270 "request=0x%x size=%d result=%d\n",
271 __func__, request, size, result);
272 return -EPROTO;
273 }
274
275 return 0;
276 }
277
278 /*
279 * cp210x_set_config
280 * Writes to the CP210x configuration registers
281 * Values less than 16 bits wide are sent directly
282 * 'size' is specified in bytes.
283 */
284 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
285 unsigned int *data, int size)
286 {
287 struct usb_serial *serial = port->serial;
288 __le32 *buf;
289 int result, i, length;
290
291 /* Number of integers required to contain the array */
292 length = (((size - 1) | 3) + 1)/4;
293
294 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
295 if (!buf) {
296 dev_err(&port->dev, "%s - out of memory.\n",
297 __func__);
298 return -ENOMEM;
299 }
300
301 /* Array of integers into bytes */
302 for (i = 0; i < length; i++)
303 buf[i] = cpu_to_le32(data[i]);
304
305 if (size > 2) {
306 result = usb_control_msg(serial->dev,
307 usb_sndctrlpipe(serial->dev, 0),
308 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
309 0, buf, size, 300);
310 } else {
311 result = usb_control_msg(serial->dev,
312 usb_sndctrlpipe(serial->dev, 0),
313 request, REQTYPE_HOST_TO_DEVICE, data[0],
314 0, NULL, 0, 300);
315 }
316
317 kfree(buf);
318
319 if ((size > 2 && result != size) || result < 0) {
320 dbg("%s - Unable to send request, "
321 "request=0x%x size=%d result=%d\n",
322 __func__, request, size, result);
323 return -EPROTO;
324 }
325
326 return 0;
327 }
328
329 /*
330 * cp210x_set_config_single
331 * Convenience function for calling cp210x_set_config on single data values
332 * without requiring an integer pointer
333 */
334 static inline int cp210x_set_config_single(struct usb_serial_port *port,
335 u8 request, unsigned int data)
336 {
337 return cp210x_set_config(port, request, &data, 2);
338 }
339
340 /*
341 * cp210x_quantise_baudrate
342 * Quantises the baud rate as per AN205 Table 1
343 */
344 static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
345 if (baud <= 56) baud = 0;
346 else if (baud <= 300) baud = 300;
347 else if (baud <= 600) baud = 600;
348 else if (baud <= 1200) baud = 1200;
349 else if (baud <= 1800) baud = 1800;
350 else if (baud <= 2400) baud = 2400;
351 else if (baud <= 4000) baud = 4000;
352 else if (baud <= 4803) baud = 4800;
353 else if (baud <= 7207) baud = 7200;
354 else if (baud <= 9612) baud = 9600;
355 else if (baud <= 14428) baud = 14400;
356 else if (baud <= 16062) baud = 16000;
357 else if (baud <= 19250) baud = 19200;
358 else if (baud <= 28912) baud = 28800;
359 else if (baud <= 38601) baud = 38400;
360 else if (baud <= 51558) baud = 51200;
361 else if (baud <= 56280) baud = 56000;
362 else if (baud <= 58053) baud = 57600;
363 else if (baud <= 64111) baud = 64000;
364 else if (baud <= 77608) baud = 76800;
365 else if (baud <= 117028) baud = 115200;
366 else if (baud <= 129347) baud = 128000;
367 else if (baud <= 156868) baud = 153600;
368 else if (baud <= 237832) baud = 230400;
369 else if (baud <= 254234) baud = 250000;
370 else if (baud <= 273066) baud = 256000;
371 else if (baud <= 491520) baud = 460800;
372 else if (baud <= 567138) baud = 500000;
373 else if (baud <= 670254) baud = 576000;
374 else if (baud <= 1053257) baud = 921600;
375 else if (baud <= 1474560) baud = 1228800;
376 else if (baud <= 2457600) baud = 1843200;
377 else baud = 3686400;
378 return baud;
379 }
380
381 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
382 {
383 int result;
384
385 dbg("%s - port %d", __func__, port->number);
386
387 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
388 dev_err(&port->dev, "%s - Unable to enable UART\n",
389 __func__);
390 return -EPROTO;
391 }
392
393 result = usb_serial_generic_open(tty, port);
394 if (result)
395 return result;
396
397 /* Configure the termios structure */
398 cp210x_get_termios(tty, port);
399 return 0;
400 }
401
402 static void cp210x_close(struct usb_serial_port *port)
403 {
404 dbg("%s - port %d", __func__, port->number);
405
406 usb_serial_generic_close(port);
407
408 mutex_lock(&port->serial->disc_mutex);
409 if (!port->serial->disconnected)
410 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
411 mutex_unlock(&port->serial->disc_mutex);
412 }
413
414 /*
415 * cp210x_get_termios
416 * Reads the baud rate, data bits, parity, stop bits and flow control mode
417 * from the device, corrects any unsupported values, and configures the
418 * termios structure to reflect the state of the device
419 */
420 static void cp210x_get_termios(struct tty_struct *tty,
421 struct usb_serial_port *port)
422 {
423 unsigned int baud;
424
425 if (tty) {
426 cp210x_get_termios_port(tty->driver_data,
427 &tty->termios->c_cflag, &baud);
428 tty_encode_baud_rate(tty, baud, baud);
429 }
430
431 else {
432 unsigned int cflag;
433 cflag = 0;
434 cp210x_get_termios_port(port, &cflag, &baud);
435 }
436 }
437
438 /*
439 * cp210x_get_termios_port
440 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
441 */
442 static void cp210x_get_termios_port(struct usb_serial_port *port,
443 unsigned int *cflagp, unsigned int *baudp)
444 {
445 unsigned int cflag, modem_ctl[4];
446 unsigned int baud;
447 unsigned int bits;
448
449 dbg("%s - port %d", __func__, port->number);
450
451 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
452 /* Convert to baudrate */
453 if (baud)
454 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
455
456 dbg("%s - baud rate = %d", __func__, baud);
457 *baudp = baud;
458
459 cflag = *cflagp;
460
461 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
462 cflag &= ~CSIZE;
463 switch (bits & BITS_DATA_MASK) {
464 case BITS_DATA_5:
465 dbg("%s - data bits = 5", __func__);
466 cflag |= CS5;
467 break;
468 case BITS_DATA_6:
469 dbg("%s - data bits = 6", __func__);
470 cflag |= CS6;
471 break;
472 case BITS_DATA_7:
473 dbg("%s - data bits = 7", __func__);
474 cflag |= CS7;
475 break;
476 case BITS_DATA_8:
477 dbg("%s - data bits = 8", __func__);
478 cflag |= CS8;
479 break;
480 case BITS_DATA_9:
481 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
482 __func__);
483 cflag |= CS8;
484 bits &= ~BITS_DATA_MASK;
485 bits |= BITS_DATA_8;
486 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
487 break;
488 default:
489 dbg("%s - Unknown number of data bits, using 8", __func__);
490 cflag |= CS8;
491 bits &= ~BITS_DATA_MASK;
492 bits |= BITS_DATA_8;
493 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
494 break;
495 }
496
497 switch (bits & BITS_PARITY_MASK) {
498 case BITS_PARITY_NONE:
499 dbg("%s - parity = NONE", __func__);
500 cflag &= ~PARENB;
501 break;
502 case BITS_PARITY_ODD:
503 dbg("%s - parity = ODD", __func__);
504 cflag |= (PARENB|PARODD);
505 break;
506 case BITS_PARITY_EVEN:
507 dbg("%s - parity = EVEN", __func__);
508 cflag &= ~PARODD;
509 cflag |= PARENB;
510 break;
511 case BITS_PARITY_MARK:
512 dbg("%s - parity = MARK (not supported, disabling parity)",
513 __func__);
514 cflag &= ~PARENB;
515 bits &= ~BITS_PARITY_MASK;
516 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
517 break;
518 case BITS_PARITY_SPACE:
519 dbg("%s - parity = SPACE (not supported, disabling parity)",
520 __func__);
521 cflag &= ~PARENB;
522 bits &= ~BITS_PARITY_MASK;
523 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
524 break;
525 default:
526 dbg("%s - Unknown parity mode, disabling parity", __func__);
527 cflag &= ~PARENB;
528 bits &= ~BITS_PARITY_MASK;
529 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
530 break;
531 }
532
533 cflag &= ~CSTOPB;
534 switch (bits & BITS_STOP_MASK) {
535 case BITS_STOP_1:
536 dbg("%s - stop bits = 1", __func__);
537 break;
538 case BITS_STOP_1_5:
539 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
540 __func__);
541 bits &= ~BITS_STOP_MASK;
542 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
543 break;
544 case BITS_STOP_2:
545 dbg("%s - stop bits = 2", __func__);
546 cflag |= CSTOPB;
547 break;
548 default:
549 dbg("%s - Unknown number of stop bits, using 1 stop bit",
550 __func__);
551 bits &= ~BITS_STOP_MASK;
552 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
553 break;
554 }
555
556 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
557 if (modem_ctl[0] & 0x0008) {
558 dbg("%s - flow control = CRTSCTS", __func__);
559 cflag |= CRTSCTS;
560 } else {
561 dbg("%s - flow control = NONE", __func__);
562 cflag &= ~CRTSCTS;
563 }
564
565 *cflagp = cflag;
566 }
567
568 static void cp210x_set_termios(struct tty_struct *tty,
569 struct usb_serial_port *port, struct ktermios *old_termios)
570 {
571 unsigned int cflag, old_cflag;
572 unsigned int baud = 0, bits;
573 unsigned int modem_ctl[4];
574
575 dbg("%s - port %d", __func__, port->number);
576
577 if (!tty)
578 return;
579
580 tty->termios->c_cflag &= ~CMSPAR;
581 cflag = tty->termios->c_cflag;
582 old_cflag = old_termios->c_cflag;
583 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
584
585 /* If the baud rate is to be updated*/
586 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
587 dbg("%s - Setting baud rate to %d baud", __func__,
588 baud);
589 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
590 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
591 dbg("Baud rate requested not supported by device");
592 baud = tty_termios_baud_rate(old_termios);
593 }
594 }
595 /* Report back the resulting baud rate */
596 tty_encode_baud_rate(tty, baud, baud);
597
598 /* If the number of data bits is to be updated */
599 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
600 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
601 bits &= ~BITS_DATA_MASK;
602 switch (cflag & CSIZE) {
603 case CS5:
604 bits |= BITS_DATA_5;
605 dbg("%s - data bits = 5", __func__);
606 break;
607 case CS6:
608 bits |= BITS_DATA_6;
609 dbg("%s - data bits = 6", __func__);
610 break;
611 case CS7:
612 bits |= BITS_DATA_7;
613 dbg("%s - data bits = 7", __func__);
614 break;
615 case CS8:
616 bits |= BITS_DATA_8;
617 dbg("%s - data bits = 8", __func__);
618 break;
619 /*case CS9:
620 bits |= BITS_DATA_9;
621 dbg("%s - data bits = 9", __func__);
622 break;*/
623 default:
624 dbg("cp210x driver does not "
625 "support the number of bits requested,"
626 " using 8 bit mode\n");
627 bits |= BITS_DATA_8;
628 break;
629 }
630 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
631 dbg("Number of data bits requested "
632 "not supported by device\n");
633 }
634
635 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
636 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
637 bits &= ~BITS_PARITY_MASK;
638 if (cflag & PARENB) {
639 if (cflag & PARODD) {
640 bits |= BITS_PARITY_ODD;
641 dbg("%s - parity = ODD", __func__);
642 } else {
643 bits |= BITS_PARITY_EVEN;
644 dbg("%s - parity = EVEN", __func__);
645 }
646 }
647 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
648 dbg("Parity mode not supported "
649 "by device\n");
650 }
651
652 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
653 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
654 bits &= ~BITS_STOP_MASK;
655 if (cflag & CSTOPB) {
656 bits |= BITS_STOP_2;
657 dbg("%s - stop bits = 2", __func__);
658 } else {
659 bits |= BITS_STOP_1;
660 dbg("%s - stop bits = 1", __func__);
661 }
662 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
663 dbg("Number of stop bits requested "
664 "not supported by device\n");
665 }
666
667 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
668 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
669 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
670 __func__, modem_ctl[0], modem_ctl[1],
671 modem_ctl[2], modem_ctl[3]);
672
673 if (cflag & CRTSCTS) {
674 modem_ctl[0] &= ~0x7B;
675 modem_ctl[0] |= 0x09;
676 modem_ctl[1] = 0x80;
677 dbg("%s - flow control = CRTSCTS", __func__);
678 } else {
679 modem_ctl[0] &= ~0x7B;
680 modem_ctl[0] |= 0x01;
681 modem_ctl[1] |= 0x40;
682 dbg("%s - flow control = NONE", __func__);
683 }
684
685 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
686 __func__, modem_ctl[0], modem_ctl[1],
687 modem_ctl[2], modem_ctl[3]);
688 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
689 }
690
691 }
692
693 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file,
694 unsigned int set, unsigned int clear)
695 {
696 struct usb_serial_port *port = tty->driver_data;
697 return cp210x_tiocmset_port(port, file, set, clear);
698 }
699
700 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file,
701 unsigned int set, unsigned int clear)
702 {
703 unsigned int control = 0;
704
705 dbg("%s - port %d", __func__, port->number);
706
707 if (set & TIOCM_RTS) {
708 control |= CONTROL_RTS;
709 control |= CONTROL_WRITE_RTS;
710 }
711 if (set & TIOCM_DTR) {
712 control |= CONTROL_DTR;
713 control |= CONTROL_WRITE_DTR;
714 }
715 if (clear & TIOCM_RTS) {
716 control &= ~CONTROL_RTS;
717 control |= CONTROL_WRITE_RTS;
718 }
719 if (clear & TIOCM_DTR) {
720 control &= ~CONTROL_DTR;
721 control |= CONTROL_WRITE_DTR;
722 }
723
724 dbg("%s - control = 0x%.4x", __func__, control);
725
726 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
727 }
728
729 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
730 {
731 if (on)
732 cp210x_tiocmset_port(p, NULL, TIOCM_DTR|TIOCM_RTS, 0);
733 else
734 cp210x_tiocmset_port(p, NULL, 0, TIOCM_DTR|TIOCM_RTS);
735 }
736
737 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file)
738 {
739 struct usb_serial_port *port = tty->driver_data;
740 unsigned int control;
741 int result;
742
743 dbg("%s - port %d", __func__, port->number);
744
745 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
746
747 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
748 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
749 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
750 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
751 |((control & CONTROL_RING)? TIOCM_RI : 0)
752 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
753
754 dbg("%s - control = 0x%.2x", __func__, control);
755
756 return result;
757 }
758
759 static int cp210x_carrier_raised(struct usb_serial_port *p)
760 {
761 unsigned int control;
762 cp210x_get_config(p, CP210X_GET_MDMSTS, &control, 1);
763 if (control & CONTROL_DCD)
764 return 1;
765 return 0;
766 }
767
768 static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
769 {
770 struct usb_serial_port *port = tty->driver_data;
771 unsigned int state;
772
773 dbg("%s - port %d", __func__, port->number);
774 if (break_state == 0)
775 state = BREAK_OFF;
776 else
777 state = BREAK_ON;
778 dbg("%s - turning break %s", __func__,
779 state == BREAK_OFF ? "off" : "on");
780 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
781 }
782
783 static int cp210x_startup(struct usb_serial *serial)
784 {
785 /* cp210x buffers behave strangely unless device is reset */
786 usb_reset_device(serial->dev);
787 return 0;
788 }
789
790 static int __init cp210x_init(void)
791 {
792 int retval;
793
794 retval = usb_serial_register(&cp210x_device);
795 if (retval)
796 return retval; /* Failed to register */
797
798 retval = usb_register(&cp210x_driver);
799 if (retval) {
800 /* Failed to register */
801 usb_serial_deregister(&cp210x_device);
802 return retval;
803 }
804
805 /* Success */
806 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
807 DRIVER_DESC "\n");
808 return 0;
809 }
810
811 static void __exit cp210x_exit(void)
812 {
813 usb_deregister(&cp210x_driver);
814 usb_serial_deregister(&cp210x_device);
815 }
816
817 module_init(cp210x_init);
818 module_exit(cp210x_exit);
819
820 MODULE_DESCRIPTION(DRIVER_DESC);
821 MODULE_VERSION(DRIVER_VERSION);
822 MODULE_LICENSE("GPL");
823
824 module_param(debug, bool, S_IRUGO | S_IWUSR);
825 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree