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USB: Add USB-ID for Multiplex RC serial adapter to cp210x.c
[zen-stable.git] / drivers / usb / serial / cp210x.c
blobadfe660ed008f00061e75d85b159f95ac766523c
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, 0x81A9) }, /* Multiplex RC Interface */
96 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
97 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
98 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
99 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
100 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
101 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
102 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
103 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
104 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
105 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
106 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
107 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
108 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
109 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
110 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
111 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
112 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
113 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
114 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
115 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
116 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
117 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
118 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
119 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
120 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
121 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
122 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
123 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
124 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
125 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
126 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
127 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
128 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
129 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
130 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
131 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
132 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
133 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
134 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
135 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
136 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
137 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
138 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
139 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
140 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
141 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
142 { } /* Terminating Entry */
143 };
144
145 MODULE_DEVICE_TABLE(usb, id_table);
146
147 static struct usb_driver cp210x_driver = {
148 .name = "cp210x",
149 .probe = usb_serial_probe,
150 .disconnect = usb_serial_disconnect,
151 .id_table = id_table,
152 .no_dynamic_id = 1,
153 };
154
155 static struct usb_serial_driver cp210x_device = {
156 .driver = {
157 .owner = THIS_MODULE,
158 .name = "cp210x",
159 },
160 .usb_driver = &cp210x_driver,
161 .id_table = id_table,
162 .num_ports = 1,
163 .bulk_in_size = 256,
164 .bulk_out_size = 256,
165 .open = cp210x_open,
166 .close = cp210x_close,
167 .break_ctl = cp210x_break_ctl,
168 .set_termios = cp210x_set_termios,
169 .tiocmget = cp210x_tiocmget,
170 .tiocmset = cp210x_tiocmset,
171 .attach = cp210x_startup,
172 .dtr_rts = cp210x_dtr_rts
173 };
174
175 /* Config request types */
176 #define REQTYPE_HOST_TO_DEVICE 0x41
177 #define REQTYPE_DEVICE_TO_HOST 0xc1
178
179 /* Config request codes */
180 #define CP210X_IFC_ENABLE 0x00
181 #define CP210X_SET_BAUDDIV 0x01
182 #define CP210X_GET_BAUDDIV 0x02
183 #define CP210X_SET_LINE_CTL 0x03
184 #define CP210X_GET_LINE_CTL 0x04
185 #define CP210X_SET_BREAK 0x05
186 #define CP210X_IMM_CHAR 0x06
187 #define CP210X_SET_MHS 0x07
188 #define CP210X_GET_MDMSTS 0x08
189 #define CP210X_SET_XON 0x09
190 #define CP210X_SET_XOFF 0x0A
191 #define CP210X_SET_EVENTMASK 0x0B
192 #define CP210X_GET_EVENTMASK 0x0C
193 #define CP210X_SET_CHAR 0x0D
194 #define CP210X_GET_CHARS 0x0E
195 #define CP210X_GET_PROPS 0x0F
196 #define CP210X_GET_COMM_STATUS 0x10
197 #define CP210X_RESET 0x11
198 #define CP210X_PURGE 0x12
199 #define CP210X_SET_FLOW 0x13
200 #define CP210X_GET_FLOW 0x14
201 #define CP210X_EMBED_EVENTS 0x15
202 #define CP210X_GET_EVENTSTATE 0x16
203 #define CP210X_SET_CHARS 0x19
204
205 /* CP210X_IFC_ENABLE */
206 #define UART_ENABLE 0x0001
207 #define UART_DISABLE 0x0000
208
209 /* CP210X_(SET|GET)_BAUDDIV */
210 #define BAUD_RATE_GEN_FREQ 0x384000
211
212 /* CP210X_(SET|GET)_LINE_CTL */
213 #define BITS_DATA_MASK 0X0f00
214 #define BITS_DATA_5 0X0500
215 #define BITS_DATA_6 0X0600
216 #define BITS_DATA_7 0X0700
217 #define BITS_DATA_8 0X0800
218 #define BITS_DATA_9 0X0900
219
220 #define BITS_PARITY_MASK 0x00f0
221 #define BITS_PARITY_NONE 0x0000
222 #define BITS_PARITY_ODD 0x0010
223 #define BITS_PARITY_EVEN 0x0020
224 #define BITS_PARITY_MARK 0x0030
225 #define BITS_PARITY_SPACE 0x0040
226
227 #define BITS_STOP_MASK 0x000f
228 #define BITS_STOP_1 0x0000
229 #define BITS_STOP_1_5 0x0001
230 #define BITS_STOP_2 0x0002
231
232 /* CP210X_SET_BREAK */
233 #define BREAK_ON 0x0001
234 #define BREAK_OFF 0x0000
235
236 /* CP210X_(SET_MHS|GET_MDMSTS) */
237 #define CONTROL_DTR 0x0001
238 #define CONTROL_RTS 0x0002
239 #define CONTROL_CTS 0x0010
240 #define CONTROL_DSR 0x0020
241 #define CONTROL_RING 0x0040
242 #define CONTROL_DCD 0x0080
243 #define CONTROL_WRITE_DTR 0x0100
244 #define CONTROL_WRITE_RTS 0x0200
245
246 /*
247 * cp210x_get_config
248 * Reads from the CP210x configuration registers
249 * 'size' is specified in bytes.
250 * 'data' is a pointer to a pre-allocated array of integers large
251 * enough to hold 'size' bytes (with 4 bytes to each integer)
252 */
253 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
254 unsigned int *data, int size)
255 {
256 struct usb_serial *serial = port->serial;
257 __le32 *buf;
258 int result, i, length;
259
260 /* Number of integers required to contain the array */
261 length = (((size - 1) | 3) + 1)/4;
262
263 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
264 if (!buf) {
265 dev_err(&port->dev, "%s - out of memory.\n", __func__);
266 return -ENOMEM;
267 }
268
269 /* Issue the request, attempting to read 'size' bytes */
270 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
271 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
272 0, buf, size, 300);
273
274 /* Convert data into an array of integers */
275 for (i = 0; i < length; i++)
276 data[i] = le32_to_cpu(buf[i]);
277
278 kfree(buf);
279
280 if (result != size) {
281 dbg("%s - Unable to send config request, "
282 "request=0x%x size=%d result=%d\n",
283 __func__, request, size, result);
284 if (result > 0)
285 result = -EPROTO;
286
287 return result;
288 }
289
290 return 0;
291 }
292
293 /*
294 * cp210x_set_config
295 * Writes to the CP210x configuration registers
296 * Values less than 16 bits wide are sent directly
297 * 'size' is specified in bytes.
298 */
299 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
300 unsigned int *data, int size)
301 {
302 struct usb_serial *serial = port->serial;
303 __le32 *buf;
304 int result, i, length;
305
306 /* Number of integers required to contain the array */
307 length = (((size - 1) | 3) + 1)/4;
308
309 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
310 if (!buf) {
311 dev_err(&port->dev, "%s - out of memory.\n",
312 __func__);
313 return -ENOMEM;
314 }
315
316 /* Array of integers into bytes */
317 for (i = 0; i < length; i++)
318 buf[i] = cpu_to_le32(data[i]);
319
320 if (size > 2) {
321 result = usb_control_msg(serial->dev,
322 usb_sndctrlpipe(serial->dev, 0),
323 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
324 0, buf, size, 300);
325 } else {
326 result = usb_control_msg(serial->dev,
327 usb_sndctrlpipe(serial->dev, 0),
328 request, REQTYPE_HOST_TO_DEVICE, data[0],
329 0, NULL, 0, 300);
330 }
331
332 kfree(buf);
333
334 if ((size > 2 && result != size) || result < 0) {
335 dbg("%s - Unable to send request, "
336 "request=0x%x size=%d result=%d\n",
337 __func__, request, size, result);
338 if (result > 0)
339 result = -EPROTO;
340
341 return result;
342 }
343
344 return 0;
345 }
346
347 /*
348 * cp210x_set_config_single
349 * Convenience function for calling cp210x_set_config on single data values
350 * without requiring an integer pointer
351 */
352 static inline int cp210x_set_config_single(struct usb_serial_port *port,
353 u8 request, unsigned int data)
354 {
355 return cp210x_set_config(port, request, &data, 2);
356 }
357
358 /*
359 * cp210x_quantise_baudrate
360 * Quantises the baud rate as per AN205 Table 1
361 */
362 static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
363 if (baud <= 56) baud = 0;
364 else if (baud <= 300) baud = 300;
365 else if (baud <= 600) baud = 600;
366 else if (baud <= 1200) baud = 1200;
367 else if (baud <= 1800) baud = 1800;
368 else if (baud <= 2400) baud = 2400;
369 else if (baud <= 4000) baud = 4000;
370 else if (baud <= 4803) baud = 4800;
371 else if (baud <= 7207) baud = 7200;
372 else if (baud <= 9612) baud = 9600;
373 else if (baud <= 14428) baud = 14400;
374 else if (baud <= 16062) baud = 16000;
375 else if (baud <= 19250) baud = 19200;
376 else if (baud <= 28912) baud = 28800;
377 else if (baud <= 38601) baud = 38400;
378 else if (baud <= 51558) baud = 51200;
379 else if (baud <= 56280) baud = 56000;
380 else if (baud <= 58053) baud = 57600;
381 else if (baud <= 64111) baud = 64000;
382 else if (baud <= 77608) baud = 76800;
383 else if (baud <= 117028) baud = 115200;
384 else if (baud <= 129347) baud = 128000;
385 else if (baud <= 156868) baud = 153600;
386 else if (baud <= 237832) baud = 230400;
387 else if (baud <= 254234) baud = 250000;
388 else if (baud <= 273066) baud = 256000;
389 else if (baud <= 491520) baud = 460800;
390 else if (baud <= 567138) baud = 500000;
391 else if (baud <= 670254) baud = 576000;
392 else if (baud <= 1053257) baud = 921600;
393 else if (baud <= 1474560) baud = 1228800;
394 else if (baud <= 2457600) baud = 1843200;
395 else baud = 3686400;
396 return baud;
397 }
398
399 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
400 {
401 int result;
402
403 dbg("%s - port %d", __func__, port->number);
404
405 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE,
406 UART_ENABLE);
407 if (result) {
408 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
409 return result;
410 }
411
412 result = usb_serial_generic_open(tty, port);
413 if (result)
414 return result;
415
416 /* Configure the termios structure */
417 cp210x_get_termios(tty, port);
418 return 0;
419 }
420
421 static void cp210x_close(struct usb_serial_port *port)
422 {
423 dbg("%s - port %d", __func__, port->number);
424
425 usb_serial_generic_close(port);
426
427 mutex_lock(&port->serial->disc_mutex);
428 if (!port->serial->disconnected)
429 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
430 mutex_unlock(&port->serial->disc_mutex);
431 }
432
433 /*
434 * cp210x_get_termios
435 * Reads the baud rate, data bits, parity, stop bits and flow control mode
436 * from the device, corrects any unsupported values, and configures the
437 * termios structure to reflect the state of the device
438 */
439 static void cp210x_get_termios(struct tty_struct *tty,
440 struct usb_serial_port *port)
441 {
442 unsigned int baud;
443
444 if (tty) {
445 cp210x_get_termios_port(tty->driver_data,
446 &tty->termios->c_cflag, &baud);
447 tty_encode_baud_rate(tty, baud, baud);
448 }
449
450 else {
451 unsigned int cflag;
452 cflag = 0;
453 cp210x_get_termios_port(port, &cflag, &baud);
454 }
455 }
456
457 /*
458 * cp210x_get_termios_port
459 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
460 */
461 static void cp210x_get_termios_port(struct usb_serial_port *port,
462 unsigned int *cflagp, unsigned int *baudp)
463 {
464 unsigned int cflag, modem_ctl[4];
465 unsigned int baud;
466 unsigned int bits;
467
468 dbg("%s - port %d", __func__, port->number);
469
470 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
471 /* Convert to baudrate */
472 if (baud)
473 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
474
475 dbg("%s - baud rate = %d", __func__, baud);
476 *baudp = baud;
477
478 cflag = *cflagp;
479
480 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
481 cflag &= ~CSIZE;
482 switch (bits & BITS_DATA_MASK) {
483 case BITS_DATA_5:
484 dbg("%s - data bits = 5", __func__);
485 cflag |= CS5;
486 break;
487 case BITS_DATA_6:
488 dbg("%s - data bits = 6", __func__);
489 cflag |= CS6;
490 break;
491 case BITS_DATA_7:
492 dbg("%s - data bits = 7", __func__);
493 cflag |= CS7;
494 break;
495 case BITS_DATA_8:
496 dbg("%s - data bits = 8", __func__);
497 cflag |= CS8;
498 break;
499 case BITS_DATA_9:
500 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
501 __func__);
502 cflag |= CS8;
503 bits &= ~BITS_DATA_MASK;
504 bits |= BITS_DATA_8;
505 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
506 break;
507 default:
508 dbg("%s - Unknown number of data bits, using 8", __func__);
509 cflag |= CS8;
510 bits &= ~BITS_DATA_MASK;
511 bits |= BITS_DATA_8;
512 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
513 break;
514 }
515
516 switch (bits & BITS_PARITY_MASK) {
517 case BITS_PARITY_NONE:
518 dbg("%s - parity = NONE", __func__);
519 cflag &= ~PARENB;
520 break;
521 case BITS_PARITY_ODD:
522 dbg("%s - parity = ODD", __func__);
523 cflag |= (PARENB|PARODD);
524 break;
525 case BITS_PARITY_EVEN:
526 dbg("%s - parity = EVEN", __func__);
527 cflag &= ~PARODD;
528 cflag |= PARENB;
529 break;
530 case BITS_PARITY_MARK:
531 dbg("%s - parity = MARK", __func__);
532 cflag |= (PARENB|PARODD|CMSPAR);
533 break;
534 case BITS_PARITY_SPACE:
535 dbg("%s - parity = SPACE", __func__);
536 cflag &= ~PARODD;
537 cflag |= (PARENB|CMSPAR);
538 break;
539 default:
540 dbg("%s - Unknown parity mode, disabling parity", __func__);
541 cflag &= ~PARENB;
542 bits &= ~BITS_PARITY_MASK;
543 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
544 break;
545 }
546
547 cflag &= ~CSTOPB;
548 switch (bits & BITS_STOP_MASK) {
549 case BITS_STOP_1:
550 dbg("%s - stop bits = 1", __func__);
551 break;
552 case BITS_STOP_1_5:
553 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
554 __func__);
555 bits &= ~BITS_STOP_MASK;
556 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
557 break;
558 case BITS_STOP_2:
559 dbg("%s - stop bits = 2", __func__);
560 cflag |= CSTOPB;
561 break;
562 default:
563 dbg("%s - Unknown number of stop bits, using 1 stop bit",
564 __func__);
565 bits &= ~BITS_STOP_MASK;
566 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
567 break;
568 }
569
570 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
571 if (modem_ctl[0] & 0x0008) {
572 dbg("%s - flow control = CRTSCTS", __func__);
573 cflag |= CRTSCTS;
574 } else {
575 dbg("%s - flow control = NONE", __func__);
576 cflag &= ~CRTSCTS;
577 }
578
579 *cflagp = cflag;
580 }
581
582 static void cp210x_set_termios(struct tty_struct *tty,
583 struct usb_serial_port *port, struct ktermios *old_termios)
584 {
585 unsigned int cflag, old_cflag;
586 unsigned int baud = 0, bits;
587 unsigned int modem_ctl[4];
588
589 dbg("%s - port %d", __func__, port->number);
590
591 if (!tty)
592 return;
593
594 cflag = tty->termios->c_cflag;
595 old_cflag = old_termios->c_cflag;
596 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
597
598 /* If the baud rate is to be updated*/
599 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
600 dbg("%s - Setting baud rate to %d baud", __func__,
601 baud);
602 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
603 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
604 dbg("Baud rate requested not supported by device");
605 baud = tty_termios_baud_rate(old_termios);
606 }
607 }
608 /* Report back the resulting baud rate */
609 tty_encode_baud_rate(tty, baud, baud);
610
611 /* If the number of data bits is to be updated */
612 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
613 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
614 bits &= ~BITS_DATA_MASK;
615 switch (cflag & CSIZE) {
616 case CS5:
617 bits |= BITS_DATA_5;
618 dbg("%s - data bits = 5", __func__);
619 break;
620 case CS6:
621 bits |= BITS_DATA_6;
622 dbg("%s - data bits = 6", __func__);
623 break;
624 case CS7:
625 bits |= BITS_DATA_7;
626 dbg("%s - data bits = 7", __func__);
627 break;
628 case CS8:
629 bits |= BITS_DATA_8;
630 dbg("%s - data bits = 8", __func__);
631 break;
632 /*case CS9:
633 bits |= BITS_DATA_9;
634 dbg("%s - data bits = 9", __func__);
635 break;*/
636 default:
637 dbg("cp210x driver does not "
638 "support the number of bits requested,"
639 " using 8 bit mode\n");
640 bits |= BITS_DATA_8;
641 break;
642 }
643 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
644 dbg("Number of data bits requested "
645 "not supported by device\n");
646 }
647
648 if ((cflag & (PARENB|PARODD|CMSPAR)) !=
649 (old_cflag & (PARENB|PARODD|CMSPAR))) {
650 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
651 bits &= ~BITS_PARITY_MASK;
652 if (cflag & PARENB) {
653 if (cflag & CMSPAR) {
654 if (cflag & PARODD) {
655 bits |= BITS_PARITY_MARK;
656 dbg("%s - parity = MARK", __func__);
657 } else {
658 bits |= BITS_PARITY_SPACE;
659 dbg("%s - parity = SPACE", __func__);
660 }
661 } else {
662 if (cflag & PARODD) {
663 bits |= BITS_PARITY_ODD;
664 dbg("%s - parity = ODD", __func__);
665 } else {
666 bits |= BITS_PARITY_EVEN;
667 dbg("%s - parity = EVEN", __func__);
668 }
669 }
670 }
671 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
672 dbg("Parity mode not supported "
673 "by device\n");
674 }
675
676 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
677 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
678 bits &= ~BITS_STOP_MASK;
679 if (cflag & CSTOPB) {
680 bits |= BITS_STOP_2;
681 dbg("%s - stop bits = 2", __func__);
682 } else {
683 bits |= BITS_STOP_1;
684 dbg("%s - stop bits = 1", __func__);
685 }
686 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
687 dbg("Number of stop bits requested "
688 "not supported by device\n");
689 }
690
691 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
692 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
693 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
694 __func__, modem_ctl[0], modem_ctl[1],
695 modem_ctl[2], modem_ctl[3]);
696
697 if (cflag & CRTSCTS) {
698 modem_ctl[0] &= ~0x7B;
699 modem_ctl[0] |= 0x09;
700 modem_ctl[1] = 0x80;
701 dbg("%s - flow control = CRTSCTS", __func__);
702 } else {
703 modem_ctl[0] &= ~0x7B;
704 modem_ctl[0] |= 0x01;
705 modem_ctl[1] |= 0x40;
706 dbg("%s - flow control = NONE", __func__);
707 }
708
709 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
710 __func__, modem_ctl[0], modem_ctl[1],
711 modem_ctl[2], modem_ctl[3]);
712 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
713 }
714
715 }
716
717 static int cp210x_tiocmset (struct tty_struct *tty,
718 unsigned int set, unsigned int clear)
719 {
720 struct usb_serial_port *port = tty->driver_data;
721 return cp210x_tiocmset_port(port, set, clear);
722 }
723
724 static int cp210x_tiocmset_port(struct usb_serial_port *port,
725 unsigned int set, unsigned int clear)
726 {
727 unsigned int control = 0;
728
729 dbg("%s - port %d", __func__, port->number);
730
731 if (set & TIOCM_RTS) {
732 control |= CONTROL_RTS;
733 control |= CONTROL_WRITE_RTS;
734 }
735 if (set & TIOCM_DTR) {
736 control |= CONTROL_DTR;
737 control |= CONTROL_WRITE_DTR;
738 }
739 if (clear & TIOCM_RTS) {
740 control &= ~CONTROL_RTS;
741 control |= CONTROL_WRITE_RTS;
742 }
743 if (clear & TIOCM_DTR) {
744 control &= ~CONTROL_DTR;
745 control |= CONTROL_WRITE_DTR;
746 }
747
748 dbg("%s - control = 0x%.4x", __func__, control);
749
750 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
751 }
752
753 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
754 {
755 if (on)
756 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
757 else
758 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
759 }
760
761 static int cp210x_tiocmget (struct tty_struct *tty)
762 {
763 struct usb_serial_port *port = tty->driver_data;
764 unsigned int control;
765 int result;
766
767 dbg("%s - port %d", __func__, port->number);
768
769 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
770
771 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
772 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
773 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
774 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
775 |((control & CONTROL_RING)? TIOCM_RI : 0)
776 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
777
778 dbg("%s - control = 0x%.2x", __func__, control);
779
780 return result;
781 }
782
783 static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
784 {
785 struct usb_serial_port *port = tty->driver_data;
786 unsigned int state;
787
788 dbg("%s - port %d", __func__, port->number);
789 if (break_state == 0)
790 state = BREAK_OFF;
791 else
792 state = BREAK_ON;
793 dbg("%s - turning break %s", __func__,
794 state == BREAK_OFF ? "off" : "on");
795 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
796 }
797
798 static int cp210x_startup(struct usb_serial *serial)
799 {
800 /* cp210x buffers behave strangely unless device is reset */
801 usb_reset_device(serial->dev);
802 return 0;
803 }
804
805 static int __init cp210x_init(void)
806 {
807 int retval;
808
809 retval = usb_serial_register(&cp210x_device);
810 if (retval)
811 return retval; /* Failed to register */
812
813 retval = usb_register(&cp210x_driver);
814 if (retval) {
815 /* Failed to register */
816 usb_serial_deregister(&cp210x_device);
817 return retval;
818 }
819
820 /* Success */
821 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
822 DRIVER_DESC "\n");
823 return 0;
824 }
825
826 static void __exit cp210x_exit(void)
827 {
828 usb_deregister(&cp210x_driver);
829 usb_serial_deregister(&cp210x_device);
830 }
831
832 module_init(cp210x_init);
833 module_exit(cp210x_exit);
834
835 MODULE_DESCRIPTION(DRIVER_DESC);
836 MODULE_VERSION(DRIVER_VERSION);
837 MODULE_LICENSE("GPL");
838
839 module_param(debug, bool, S_IRUGO | S_IWUSR);
840 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");