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Add linux-next specific files for 20110421
[linux-2.6/next.git] / drivers / usb / serial / cp210x.c
blob0f11afdda134387f311896534374c30a89eda318
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 *);
45 static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
46 static int cp210x_tiocmset_port(struct usb_serial_port *port,
47 unsigned int, unsigned int);
48 static void cp210x_break_ctl(struct tty_struct *, int);
49 static int cp210x_startup(struct usb_serial *);
50 static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
51
52 static int debug;
53
54 static const struct usb_device_id id_table[] = {
55 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
56 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
57 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
58 { USB_DEVICE(0x0489, 0xE003) }, /* 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, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
89 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
90 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
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 demonstration 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, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
111 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
112 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
113 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
114 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
115 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
116 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
117 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
118 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
119 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
120 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
121 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
122 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
123 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
124 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
125 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
126 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
127 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
128 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
129 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
130 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
131 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
132 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
133 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
134 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
135 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
136 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
137 { } /* Terminating Entry */
138 };
139
140 MODULE_DEVICE_TABLE(usb, id_table);
141
142 static struct usb_driver cp210x_driver = {
143 .name = "cp210x",
144 .probe = usb_serial_probe,
145 .disconnect = usb_serial_disconnect,
146 .id_table = id_table,
147 .no_dynamic_id = 1,
148 };
149
150 static struct usb_serial_driver cp210x_device = {
151 .driver = {
152 .owner = THIS_MODULE,
153 .name = "cp210x",
154 },
155 .usb_driver = &cp210x_driver,
156 .id_table = id_table,
157 .num_ports = 1,
158 .bulk_in_size = 256,
159 .bulk_out_size = 256,
160 .open = cp210x_open,
161 .close = cp210x_close,
162 .break_ctl = cp210x_break_ctl,
163 .set_termios = cp210x_set_termios,
164 .tiocmget = cp210x_tiocmget,
165 .tiocmset = cp210x_tiocmset,
166 .attach = cp210x_startup,
167 .dtr_rts = cp210x_dtr_rts
168 };
169
170 /* Config request types */
171 #define REQTYPE_HOST_TO_DEVICE 0x41
172 #define REQTYPE_DEVICE_TO_HOST 0xc1
173
174 /* Config request codes */
175 #define CP210X_IFC_ENABLE 0x00
176 #define CP210X_SET_BAUDDIV 0x01
177 #define CP210X_GET_BAUDDIV 0x02
178 #define CP210X_SET_LINE_CTL 0x03
179 #define CP210X_GET_LINE_CTL 0x04
180 #define CP210X_SET_BREAK 0x05
181 #define CP210X_IMM_CHAR 0x06
182 #define CP210X_SET_MHS 0x07
183 #define CP210X_GET_MDMSTS 0x08
184 #define CP210X_SET_XON 0x09
185 #define CP210X_SET_XOFF 0x0A
186 #define CP210X_SET_EVENTMASK 0x0B
187 #define CP210X_GET_EVENTMASK 0x0C
188 #define CP210X_SET_CHAR 0x0D
189 #define CP210X_GET_CHARS 0x0E
190 #define CP210X_GET_PROPS 0x0F
191 #define CP210X_GET_COMM_STATUS 0x10
192 #define CP210X_RESET 0x11
193 #define CP210X_PURGE 0x12
194 #define CP210X_SET_FLOW 0x13
195 #define CP210X_GET_FLOW 0x14
196 #define CP210X_EMBED_EVENTS 0x15
197 #define CP210X_GET_EVENTSTATE 0x16
198 #define CP210X_SET_CHARS 0x19
199
200 /* CP210X_IFC_ENABLE */
201 #define UART_ENABLE 0x0001
202 #define UART_DISABLE 0x0000
203
204 /* CP210X_(SET|GET)_BAUDDIV */
205 #define BAUD_RATE_GEN_FREQ 0x384000
206
207 /* CP210X_(SET|GET)_LINE_CTL */
208 #define BITS_DATA_MASK 0X0f00
209 #define BITS_DATA_5 0X0500
210 #define BITS_DATA_6 0X0600
211 #define BITS_DATA_7 0X0700
212 #define BITS_DATA_8 0X0800
213 #define BITS_DATA_9 0X0900
214
215 #define BITS_PARITY_MASK 0x00f0
216 #define BITS_PARITY_NONE 0x0000
217 #define BITS_PARITY_ODD 0x0010
218 #define BITS_PARITY_EVEN 0x0020
219 #define BITS_PARITY_MARK 0x0030
220 #define BITS_PARITY_SPACE 0x0040
221
222 #define BITS_STOP_MASK 0x000f
223 #define BITS_STOP_1 0x0000
224 #define BITS_STOP_1_5 0x0001
225 #define BITS_STOP_2 0x0002
226
227 /* CP210X_SET_BREAK */
228 #define BREAK_ON 0x0001
229 #define BREAK_OFF 0x0000
230
231 /* CP210X_(SET_MHS|GET_MDMSTS) */
232 #define CONTROL_DTR 0x0001
233 #define CONTROL_RTS 0x0002
234 #define CONTROL_CTS 0x0010
235 #define CONTROL_DSR 0x0020
236 #define CONTROL_RING 0x0040
237 #define CONTROL_DCD 0x0080
238 #define CONTROL_WRITE_DTR 0x0100
239 #define CONTROL_WRITE_RTS 0x0200
240
241 /*
242 * cp210x_get_config
243 * Reads from the CP210x configuration registers
244 * 'size' is specified in bytes.
245 * 'data' is a pointer to a pre-allocated array of integers large
246 * enough to hold 'size' bytes (with 4 bytes to each integer)
247 */
248 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
249 unsigned int *data, int size)
250 {
251 struct usb_serial *serial = port->serial;
252 __le32 *buf;
253 int result, i, length;
254
255 /* Number of integers required to contain the array */
256 length = (((size - 1) | 3) + 1)/4;
257
258 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
259 if (!buf) {
260 dev_err(&port->dev, "%s - out of memory.\n", __func__);
261 return -ENOMEM;
262 }
263
264 /* Issue the request, attempting to read 'size' bytes */
265 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
266 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
267 0, buf, size, 300);
268
269 /* Convert data into an array of integers */
270 for (i = 0; i < length; i++)
271 data[i] = le32_to_cpu(buf[i]);
272
273 kfree(buf);
274
275 if (result != size) {
276 dbg("%s - Unable to send config request, "
277 "request=0x%x size=%d result=%d\n",
278 __func__, request, size, result);
279 return -EPROTO;
280 }
281
282 return 0;
283 }
284
285 /*
286 * cp210x_set_config
287 * Writes to the CP210x configuration registers
288 * Values less than 16 bits wide are sent directly
289 * 'size' is specified in bytes.
290 */
291 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
292 unsigned int *data, int size)
293 {
294 struct usb_serial *serial = port->serial;
295 __le32 *buf;
296 int result, i, length;
297
298 /* Number of integers required to contain the array */
299 length = (((size - 1) | 3) + 1)/4;
300
301 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
302 if (!buf) {
303 dev_err(&port->dev, "%s - out of memory.\n",
304 __func__);
305 return -ENOMEM;
306 }
307
308 /* Array of integers into bytes */
309 for (i = 0; i < length; i++)
310 buf[i] = cpu_to_le32(data[i]);
311
312 if (size > 2) {
313 result = usb_control_msg(serial->dev,
314 usb_sndctrlpipe(serial->dev, 0),
315 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
316 0, buf, size, 300);
317 } else {
318 result = usb_control_msg(serial->dev,
319 usb_sndctrlpipe(serial->dev, 0),
320 request, REQTYPE_HOST_TO_DEVICE, data[0],
321 0, NULL, 0, 300);
322 }
323
324 kfree(buf);
325
326 if ((size > 2 && result != size) || result < 0) {
327 dbg("%s - Unable to send request, "
328 "request=0x%x size=%d result=%d\n",
329 __func__, request, size, result);
330 return -EPROTO;
331 }
332
333 return 0;
334 }
335
336 /*
337 * cp210x_set_config_single
338 * Convenience function for calling cp210x_set_config on single data values
339 * without requiring an integer pointer
340 */
341 static inline int cp210x_set_config_single(struct usb_serial_port *port,
342 u8 request, unsigned int data)
343 {
344 return cp210x_set_config(port, request, &data, 2);
345 }
346
347 /*
348 * cp210x_quantise_baudrate
349 * Quantises the baud rate as per AN205 Table 1
350 */
351 static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
352 if (baud <= 56) baud = 0;
353 else if (baud <= 300) baud = 300;
354 else if (baud <= 600) baud = 600;
355 else if (baud <= 1200) baud = 1200;
356 else if (baud <= 1800) baud = 1800;
357 else if (baud <= 2400) baud = 2400;
358 else if (baud <= 4000) baud = 4000;
359 else if (baud <= 4803) baud = 4800;
360 else if (baud <= 7207) baud = 7200;
361 else if (baud <= 9612) baud = 9600;
362 else if (baud <= 14428) baud = 14400;
363 else if (baud <= 16062) baud = 16000;
364 else if (baud <= 19250) baud = 19200;
365 else if (baud <= 28912) baud = 28800;
366 else if (baud <= 38601) baud = 38400;
367 else if (baud <= 51558) baud = 51200;
368 else if (baud <= 56280) baud = 56000;
369 else if (baud <= 58053) baud = 57600;
370 else if (baud <= 64111) baud = 64000;
371 else if (baud <= 77608) baud = 76800;
372 else if (baud <= 117028) baud = 115200;
373 else if (baud <= 129347) baud = 128000;
374 else if (baud <= 156868) baud = 153600;
375 else if (baud <= 237832) baud = 230400;
376 else if (baud <= 254234) baud = 250000;
377 else if (baud <= 273066) baud = 256000;
378 else if (baud <= 491520) baud = 460800;
379 else if (baud <= 567138) baud = 500000;
380 else if (baud <= 670254) baud = 576000;
381 else if (baud <= 1053257) baud = 921600;
382 else if (baud <= 1474560) baud = 1228800;
383 else if (baud <= 2457600) baud = 1843200;
384 else baud = 3686400;
385 return baud;
386 }
387
388 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
389 {
390 int result;
391
392 dbg("%s - port %d", __func__, port->number);
393
394 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
395 dev_err(&port->dev, "%s - Unable to enable UART\n",
396 __func__);
397 return -EPROTO;
398 }
399
400 result = usb_serial_generic_open(tty, port);
401 if (result)
402 return result;
403
404 /* Configure the termios structure */
405 cp210x_get_termios(tty, port);
406 return 0;
407 }
408
409 static void cp210x_close(struct usb_serial_port *port)
410 {
411 dbg("%s - port %d", __func__, port->number);
412
413 usb_serial_generic_close(port);
414
415 mutex_lock(&port->serial->disc_mutex);
416 if (!port->serial->disconnected)
417 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
418 mutex_unlock(&port->serial->disc_mutex);
419 }
420
421 /*
422 * cp210x_get_termios
423 * Reads the baud rate, data bits, parity, stop bits and flow control mode
424 * from the device, corrects any unsupported values, and configures the
425 * termios structure to reflect the state of the device
426 */
427 static void cp210x_get_termios(struct tty_struct *tty,
428 struct usb_serial_port *port)
429 {
430 unsigned int baud;
431
432 if (tty) {
433 cp210x_get_termios_port(tty->driver_data,
434 &tty->termios->c_cflag, &baud);
435 tty_encode_baud_rate(tty, baud, baud);
436 }
437
438 else {
439 unsigned int cflag;
440 cflag = 0;
441 cp210x_get_termios_port(port, &cflag, &baud);
442 }
443 }
444
445 /*
446 * cp210x_get_termios_port
447 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
448 */
449 static void cp210x_get_termios_port(struct usb_serial_port *port,
450 unsigned int *cflagp, unsigned int *baudp)
451 {
452 unsigned int cflag, modem_ctl[4];
453 unsigned int baud;
454 unsigned int bits;
455
456 dbg("%s - port %d", __func__, port->number);
457
458 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
459 /* Convert to baudrate */
460 if (baud)
461 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
462
463 dbg("%s - baud rate = %d", __func__, baud);
464 *baudp = baud;
465
466 cflag = *cflagp;
467
468 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
469 cflag &= ~CSIZE;
470 switch (bits & BITS_DATA_MASK) {
471 case BITS_DATA_5:
472 dbg("%s - data bits = 5", __func__);
473 cflag |= CS5;
474 break;
475 case BITS_DATA_6:
476 dbg("%s - data bits = 6", __func__);
477 cflag |= CS6;
478 break;
479 case BITS_DATA_7:
480 dbg("%s - data bits = 7", __func__);
481 cflag |= CS7;
482 break;
483 case BITS_DATA_8:
484 dbg("%s - data bits = 8", __func__);
485 cflag |= CS8;
486 break;
487 case BITS_DATA_9:
488 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
489 __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 default:
496 dbg("%s - Unknown number of data bits, using 8", __func__);
497 cflag |= CS8;
498 bits &= ~BITS_DATA_MASK;
499 bits |= BITS_DATA_8;
500 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
501 break;
502 }
503
504 switch (bits & BITS_PARITY_MASK) {
505 case BITS_PARITY_NONE:
506 dbg("%s - parity = NONE", __func__);
507 cflag &= ~PARENB;
508 break;
509 case BITS_PARITY_ODD:
510 dbg("%s - parity = ODD", __func__);
511 cflag |= (PARENB|PARODD);
512 break;
513 case BITS_PARITY_EVEN:
514 dbg("%s - parity = EVEN", __func__);
515 cflag &= ~PARODD;
516 cflag |= PARENB;
517 break;
518 case BITS_PARITY_MARK:
519 dbg("%s - parity = MARK (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 case BITS_PARITY_SPACE:
526 dbg("%s - parity = SPACE (not supported, disabling parity)",
527 __func__);
528 cflag &= ~PARENB;
529 bits &= ~BITS_PARITY_MASK;
530 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
531 break;
532 default:
533 dbg("%s - Unknown parity mode, disabling parity", __func__);
534 cflag &= ~PARENB;
535 bits &= ~BITS_PARITY_MASK;
536 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
537 break;
538 }
539
540 cflag &= ~CSTOPB;
541 switch (bits & BITS_STOP_MASK) {
542 case BITS_STOP_1:
543 dbg("%s - stop bits = 1", __func__);
544 break;
545 case BITS_STOP_1_5:
546 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
547 __func__);
548 bits &= ~BITS_STOP_MASK;
549 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
550 break;
551 case BITS_STOP_2:
552 dbg("%s - stop bits = 2", __func__);
553 cflag |= CSTOPB;
554 break;
555 default:
556 dbg("%s - Unknown number of stop bits, using 1 stop bit",
557 __func__);
558 bits &= ~BITS_STOP_MASK;
559 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
560 break;
561 }
562
563 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
564 if (modem_ctl[0] & 0x0008) {
565 dbg("%s - flow control = CRTSCTS", __func__);
566 cflag |= CRTSCTS;
567 } else {
568 dbg("%s - flow control = NONE", __func__);
569 cflag &= ~CRTSCTS;
570 }
571
572 *cflagp = cflag;
573 }
574
575 static void cp210x_set_termios(struct tty_struct *tty,
576 struct usb_serial_port *port, struct ktermios *old_termios)
577 {
578 unsigned int cflag, old_cflag;
579 unsigned int baud = 0, bits;
580 unsigned int modem_ctl[4];
581
582 dbg("%s - port %d", __func__, port->number);
583
584 if (!tty)
585 return;
586
587 tty->termios->c_cflag &= ~CMSPAR;
588 cflag = tty->termios->c_cflag;
589 old_cflag = old_termios->c_cflag;
590 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
591
592 /* If the baud rate is to be updated*/
593 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
594 dbg("%s - Setting baud rate to %d baud", __func__,
595 baud);
596 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
597 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
598 dbg("Baud rate requested not supported by device");
599 baud = tty_termios_baud_rate(old_termios);
600 }
601 }
602 /* Report back the resulting baud rate */
603 tty_encode_baud_rate(tty, baud, baud);
604
605 /* If the number of data bits is to be updated */
606 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
607 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
608 bits &= ~BITS_DATA_MASK;
609 switch (cflag & CSIZE) {
610 case CS5:
611 bits |= BITS_DATA_5;
612 dbg("%s - data bits = 5", __func__);
613 break;
614 case CS6:
615 bits |= BITS_DATA_6;
616 dbg("%s - data bits = 6", __func__);
617 break;
618 case CS7:
619 bits |= BITS_DATA_7;
620 dbg("%s - data bits = 7", __func__);
621 break;
622 case CS8:
623 bits |= BITS_DATA_8;
624 dbg("%s - data bits = 8", __func__);
625 break;
626 /*case CS9:
627 bits |= BITS_DATA_9;
628 dbg("%s - data bits = 9", __func__);
629 break;*/
630 default:
631 dbg("cp210x driver does not "
632 "support the number of bits requested,"
633 " using 8 bit mode\n");
634 bits |= BITS_DATA_8;
635 break;
636 }
637 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
638 dbg("Number of data bits requested "
639 "not supported by device\n");
640 }
641
642 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
643 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
644 bits &= ~BITS_PARITY_MASK;
645 if (cflag & PARENB) {
646 if (cflag & PARODD) {
647 bits |= BITS_PARITY_ODD;
648 dbg("%s - parity = ODD", __func__);
649 } else {
650 bits |= BITS_PARITY_EVEN;
651 dbg("%s - parity = EVEN", __func__);
652 }
653 }
654 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
655 dbg("Parity mode not supported "
656 "by device\n");
657 }
658
659 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
660 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
661 bits &= ~BITS_STOP_MASK;
662 if (cflag & CSTOPB) {
663 bits |= BITS_STOP_2;
664 dbg("%s - stop bits = 2", __func__);
665 } else {
666 bits |= BITS_STOP_1;
667 dbg("%s - stop bits = 1", __func__);
668 }
669 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
670 dbg("Number of stop bits requested "
671 "not supported by device\n");
672 }
673
674 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
675 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
676 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
677 __func__, modem_ctl[0], modem_ctl[1],
678 modem_ctl[2], modem_ctl[3]);
679
680 if (cflag & CRTSCTS) {
681 modem_ctl[0] &= ~0x7B;
682 modem_ctl[0] |= 0x09;
683 modem_ctl[1] = 0x80;
684 dbg("%s - flow control = CRTSCTS", __func__);
685 } else {
686 modem_ctl[0] &= ~0x7B;
687 modem_ctl[0] |= 0x01;
688 modem_ctl[1] |= 0x40;
689 dbg("%s - flow control = NONE", __func__);
690 }
691
692 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
693 __func__, modem_ctl[0], modem_ctl[1],
694 modem_ctl[2], modem_ctl[3]);
695 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
696 }
697
698 }
699
700 static int cp210x_tiocmset (struct tty_struct *tty,
701 unsigned int set, unsigned int clear)
702 {
703 struct usb_serial_port *port = tty->driver_data;
704 return cp210x_tiocmset_port(port, set, clear);
705 }
706
707 static int cp210x_tiocmset_port(struct usb_serial_port *port,
708 unsigned int set, unsigned int clear)
709 {
710 unsigned int control = 0;
711
712 dbg("%s - port %d", __func__, port->number);
713
714 if (set & TIOCM_RTS) {
715 control |= CONTROL_RTS;
716 control |= CONTROL_WRITE_RTS;
717 }
718 if (set & TIOCM_DTR) {
719 control |= CONTROL_DTR;
720 control |= CONTROL_WRITE_DTR;
721 }
722 if (clear & TIOCM_RTS) {
723 control &= ~CONTROL_RTS;
724 control |= CONTROL_WRITE_RTS;
725 }
726 if (clear & TIOCM_DTR) {
727 control &= ~CONTROL_DTR;
728 control |= CONTROL_WRITE_DTR;
729 }
730
731 dbg("%s - control = 0x%.4x", __func__, control);
732
733 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
734 }
735
736 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
737 {
738 if (on)
739 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
740 else
741 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
742 }
743
744 static int cp210x_tiocmget (struct tty_struct *tty)
745 {
746 struct usb_serial_port *port = tty->driver_data;
747 unsigned int control;
748 int result;
749
750 dbg("%s - port %d", __func__, port->number);
751
752 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
753
754 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
755 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
756 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
757 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
758 |((control & CONTROL_RING)? TIOCM_RI : 0)
759 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
760
761 dbg("%s - control = 0x%.2x", __func__, control);
762
763 return result;
764 }
765
766 static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
767 {
768 struct usb_serial_port *port = tty->driver_data;
769 unsigned int state;
770
771 dbg("%s - port %d", __func__, port->number);
772 if (break_state == 0)
773 state = BREAK_OFF;
774 else
775 state = BREAK_ON;
776 dbg("%s - turning break %s", __func__,
777 state == BREAK_OFF ? "off" : "on");
778 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
779 }
780
781 static int cp210x_startup(struct usb_serial *serial)
782 {
783 /* cp210x buffers behave strangely unless device is reset */
784 usb_reset_device(serial->dev);
785 return 0;
786 }
787
788 static int __init cp210x_init(void)
789 {
790 int retval;
791
792 retval = usb_serial_register(&cp210x_device);
793 if (retval)
794 return retval; /* Failed to register */
795
796 retval = usb_register(&cp210x_driver);
797 if (retval) {
798 /* Failed to register */
799 usb_serial_deregister(&cp210x_device);
800 return retval;
801 }
802
803 /* Success */
804 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
805 DRIVER_DESC "\n");
806 return 0;
807 }
808
809 static void __exit cp210x_exit(void)
810 {
811 usb_deregister(&cp210x_driver);
812 usb_serial_deregister(&cp210x_device);
813 }
814
815 module_init(cp210x_init);
816 module_exit(cp210x_exit);
817
818 MODULE_DESCRIPTION(DRIVER_DESC);
819 MODULE_VERSION(DRIVER_VERSION);
820 MODULE_LICENSE("GPL");
821
822 module_param(debug, bool, S_IRUGO | S_IWUSR);
823 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");
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