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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / usb / serial / cp210x.c
blob735ea03157abad3e9692978767a9d0e61d92eabd
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
53 static int debug;
54
55 static const struct usb_device_id id_table[] = {
56 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
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(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
60 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
61 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
62 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
63 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
64 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
65 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
66 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
67 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
68 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
69 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
70 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
71 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
72 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
73 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
74 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
75 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
76 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
77 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
78 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
79 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
80 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
81 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
82 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
83 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
84 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
85 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
86 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
87 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
88 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
89 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
90 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
91 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
92 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
93 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
94 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
95 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
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 demostration module */
106 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesys 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, 0xEA60) }, /* Silicon Labs factory default */
117 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
118 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
119 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
120 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
121 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
122 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
123 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
124 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
125 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
126 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
127 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
128 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
129 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
130 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
131 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
132 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
133 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
134 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
135 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
136 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
137 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
138 { } /* Terminating Entry */
139 };
140
141 MODULE_DEVICE_TABLE(usb, id_table);
142
143 static struct usb_driver cp210x_driver = {
144 .name = "cp210x",
145 .probe = usb_serial_probe,
146 .disconnect = usb_serial_disconnect,
147 .id_table = id_table,
148 .no_dynamic_id = 1,
149 };
150
151 static struct usb_serial_driver cp210x_device = {
152 .driver = {
153 .owner = THIS_MODULE,
154 .name = "cp210x",
155 },
156 .usb_driver = &cp210x_driver,
157 .id_table = id_table,
158 .num_ports = 1,
159 .bulk_in_size = 256,
160 .bulk_out_size = 256,
161 .open = cp210x_open,
162 .close = cp210x_close,
163 .break_ctl = cp210x_break_ctl,
164 .set_termios = cp210x_set_termios,
165 .tiocmget = cp210x_tiocmget,
166 .tiocmset = cp210x_tiocmset,
167 .attach = cp210x_startup,
168 .dtr_rts = cp210x_dtr_rts
169 };
170
171 /* Config request types */
172 #define REQTYPE_HOST_TO_DEVICE 0x41
173 #define REQTYPE_DEVICE_TO_HOST 0xc1
174
175 /* Config request codes */
176 #define CP210X_IFC_ENABLE 0x00
177 #define CP210X_SET_BAUDDIV 0x01
178 #define CP210X_GET_BAUDDIV 0x02
179 #define CP210X_SET_LINE_CTL 0x03
180 #define CP210X_GET_LINE_CTL 0x04
181 #define CP210X_SET_BREAK 0x05
182 #define CP210X_IMM_CHAR 0x06
183 #define CP210X_SET_MHS 0x07
184 #define CP210X_GET_MDMSTS 0x08
185 #define CP210X_SET_XON 0x09
186 #define CP210X_SET_XOFF 0x0A
187 #define CP210X_SET_EVENTMASK 0x0B
188 #define CP210X_GET_EVENTMASK 0x0C
189 #define CP210X_SET_CHAR 0x0D
190 #define CP210X_GET_CHARS 0x0E
191 #define CP210X_GET_PROPS 0x0F
192 #define CP210X_GET_COMM_STATUS 0x10
193 #define CP210X_RESET 0x11
194 #define CP210X_PURGE 0x12
195 #define CP210X_SET_FLOW 0x13
196 #define CP210X_GET_FLOW 0x14
197 #define CP210X_EMBED_EVENTS 0x15
198 #define CP210X_GET_EVENTSTATE 0x16
199 #define CP210X_SET_CHARS 0x19
200
201 /* CP210X_IFC_ENABLE */
202 #define UART_ENABLE 0x0001
203 #define UART_DISABLE 0x0000
204
205 /* CP210X_(SET|GET)_BAUDDIV */
206 #define BAUD_RATE_GEN_FREQ 0x384000
207
208 /* CP210X_(SET|GET)_LINE_CTL */
209 #define BITS_DATA_MASK 0X0f00
210 #define BITS_DATA_5 0X0500
211 #define BITS_DATA_6 0X0600
212 #define BITS_DATA_7 0X0700
213 #define BITS_DATA_8 0X0800
214 #define BITS_DATA_9 0X0900
215
216 #define BITS_PARITY_MASK 0x00f0
217 #define BITS_PARITY_NONE 0x0000
218 #define BITS_PARITY_ODD 0x0010
219 #define BITS_PARITY_EVEN 0x0020
220 #define BITS_PARITY_MARK 0x0030
221 #define BITS_PARITY_SPACE 0x0040
222
223 #define BITS_STOP_MASK 0x000f
224 #define BITS_STOP_1 0x0000
225 #define BITS_STOP_1_5 0x0001
226 #define BITS_STOP_2 0x0002
227
228 /* CP210X_SET_BREAK */
229 #define BREAK_ON 0x0001
230 #define BREAK_OFF 0x0000
231
232 /* CP210X_(SET_MHS|GET_MDMSTS) */
233 #define CONTROL_DTR 0x0001
234 #define CONTROL_RTS 0x0002
235 #define CONTROL_CTS 0x0010
236 #define CONTROL_DSR 0x0020
237 #define CONTROL_RING 0x0040
238 #define CONTROL_DCD 0x0080
239 #define CONTROL_WRITE_DTR 0x0100
240 #define CONTROL_WRITE_RTS 0x0200
241
242 /*
243 * cp210x_get_config
244 * Reads from the CP210x configuration registers
245 * 'size' is specified in bytes.
246 * 'data' is a pointer to a pre-allocated array of integers large
247 * enough to hold 'size' bytes (with 4 bytes to each integer)
248 */
249 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
250 unsigned int *data, int size)
251 {
252 struct usb_serial *serial = port->serial;
253 __le32 *buf;
254 int result, i, length;
255
256 /* Number of integers required to contain the array */
257 length = (((size - 1) | 3) + 1)/4;
258
259 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
260 if (!buf) {
261 dev_err(&port->dev, "%s - out of memory.\n", __func__);
262 return -ENOMEM;
263 }
264
265 /* Issue the request, attempting to read 'size' bytes */
266 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
267 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
268 0, buf, size, 300);
269
270 /* Convert data into an array of integers */
271 for (i = 0; i < length; i++)
272 data[i] = le32_to_cpu(buf[i]);
273
274 kfree(buf);
275
276 if (result != size) {
277 dbg("%s - Unable to send config request, "
278 "request=0x%x size=%d result=%d\n",
279 __func__, request, size, result);
280 return -EPROTO;
281 }
282
283 return 0;
284 }
285
286 /*
287 * cp210x_set_config
288 * Writes to the CP210x configuration registers
289 * Values less than 16 bits wide are sent directly
290 * 'size' is specified in bytes.
291 */
292 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
293 unsigned int *data, int size)
294 {
295 struct usb_serial *serial = port->serial;
296 __le32 *buf;
297 int result, i, length;
298
299 /* Number of integers required to contain the array */
300 length = (((size - 1) | 3) + 1)/4;
301
302 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
303 if (!buf) {
304 dev_err(&port->dev, "%s - out of memory.\n",
305 __func__);
306 return -ENOMEM;
307 }
308
309 /* Array of integers into bytes */
310 for (i = 0; i < length; i++)
311 buf[i] = cpu_to_le32(data[i]);
312
313 if (size > 2) {
314 result = usb_control_msg(serial->dev,
315 usb_sndctrlpipe(serial->dev, 0),
316 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
317 0, buf, size, 300);
318 } else {
319 result = usb_control_msg(serial->dev,
320 usb_sndctrlpipe(serial->dev, 0),
321 request, REQTYPE_HOST_TO_DEVICE, data[0],
322 0, NULL, 0, 300);
323 }
324
325 kfree(buf);
326
327 if ((size > 2 && result != size) || result < 0) {
328 dbg("%s - Unable to send request, "
329 "request=0x%x size=%d result=%d\n",
330 __func__, request, size, result);
331 return -EPROTO;
332 }
333
334 return 0;
335 }
336
337 /*
338 * cp210x_set_config_single
339 * Convenience function for calling cp210x_set_config on single data values
340 * without requiring an integer pointer
341 */
342 static inline int cp210x_set_config_single(struct usb_serial_port *port,
343 u8 request, unsigned int data)
344 {
345 return cp210x_set_config(port, request, &data, 2);
346 }
347
348 /*
349 * cp210x_quantise_baudrate
350 * Quantises the baud rate as per AN205 Table 1
351 */
352 static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
353 if (baud <= 56) baud = 0;
354 else if (baud <= 300) baud = 300;
355 else if (baud <= 600) baud = 600;
356 else if (baud <= 1200) baud = 1200;
357 else if (baud <= 1800) baud = 1800;
358 else if (baud <= 2400) baud = 2400;
359 else if (baud <= 4000) baud = 4000;
360 else if (baud <= 4803) baud = 4800;
361 else if (baud <= 7207) baud = 7200;
362 else if (baud <= 9612) baud = 9600;
363 else if (baud <= 14428) baud = 14400;
364 else if (baud <= 16062) baud = 16000;
365 else if (baud <= 19250) baud = 19200;
366 else if (baud <= 28912) baud = 28800;
367 else if (baud <= 38601) baud = 38400;
368 else if (baud <= 51558) baud = 51200;
369 else if (baud <= 56280) baud = 56000;
370 else if (baud <= 58053) baud = 57600;
371 else if (baud <= 64111) baud = 64000;
372 else if (baud <= 77608) baud = 76800;
373 else if (baud <= 117028) baud = 115200;
374 else if (baud <= 129347) baud = 128000;
375 else if (baud <= 156868) baud = 153600;
376 else if (baud <= 237832) baud = 230400;
377 else if (baud <= 254234) baud = 250000;
378 else if (baud <= 273066) baud = 256000;
379 else if (baud <= 491520) baud = 460800;
380 else if (baud <= 567138) baud = 500000;
381 else if (baud <= 670254) baud = 576000;
382 else if (baud <= 1053257) baud = 921600;
383 else if (baud <= 1474560) baud = 1228800;
384 else if (baud <= 2457600) baud = 1843200;
385 else baud = 3686400;
386 return baud;
387 }
388
389 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
390 {
391 int result;
392
393 dbg("%s - port %d", __func__, port->number);
394
395 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
396 dev_err(&port->dev, "%s - Unable to enable UART\n",
397 __func__);
398 return -EPROTO;
399 }
400
401 result = usb_serial_generic_open(tty, port);
402 if (result)
403 return result;
404
405 /* Configure the termios structure */
406 cp210x_get_termios(tty, port);
407 return 0;
408 }
409
410 static void cp210x_close(struct usb_serial_port *port)
411 {
412 dbg("%s - port %d", __func__, port->number);
413
414 usb_serial_generic_close(port);
415
416 mutex_lock(&port->serial->disc_mutex);
417 if (!port->serial->disconnected)
418 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
419 mutex_unlock(&port->serial->disc_mutex);
420 }
421
422 /*
423 * cp210x_get_termios
424 * Reads the baud rate, data bits, parity, stop bits and flow control mode
425 * from the device, corrects any unsupported values, and configures the
426 * termios structure to reflect the state of the device
427 */
428 static void cp210x_get_termios(struct tty_struct *tty,
429 struct usb_serial_port *port)
430 {
431 unsigned int baud;
432
433 if (tty) {
434 cp210x_get_termios_port(tty->driver_data,
435 &tty->termios->c_cflag, &baud);
436 tty_encode_baud_rate(tty, baud, baud);
437 }
438
439 else {
440 unsigned int cflag;
441 cflag = 0;
442 cp210x_get_termios_port(port, &cflag, &baud);
443 }
444 }
445
446 /*
447 * cp210x_get_termios_port
448 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
449 */
450 static void cp210x_get_termios_port(struct usb_serial_port *port,
451 unsigned int *cflagp, unsigned int *baudp)
452 {
453 unsigned int cflag, modem_ctl[4];
454 unsigned int baud;
455 unsigned int bits;
456
457 dbg("%s - port %d", __func__, port->number);
458
459 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
460 /* Convert to baudrate */
461 if (baud)
462 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
463
464 dbg("%s - baud rate = %d", __func__, baud);
465 *baudp = baud;
466
467 cflag = *cflagp;
468
469 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
470 cflag &= ~CSIZE;
471 switch (bits & BITS_DATA_MASK) {
472 case BITS_DATA_5:
473 dbg("%s - data bits = 5", __func__);
474 cflag |= CS5;
475 break;
476 case BITS_DATA_6:
477 dbg("%s - data bits = 6", __func__);
478 cflag |= CS6;
479 break;
480 case BITS_DATA_7:
481 dbg("%s - data bits = 7", __func__);
482 cflag |= CS7;
483 break;
484 case BITS_DATA_8:
485 dbg("%s - data bits = 8", __func__);
486 cflag |= CS8;
487 break;
488 case BITS_DATA_9:
489 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
490 __func__);
491 cflag |= CS8;
492 bits &= ~BITS_DATA_MASK;
493 bits |= BITS_DATA_8;
494 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
495 break;
496 default:
497 dbg("%s - Unknown number of data bits, using 8", __func__);
498 cflag |= CS8;
499 bits &= ~BITS_DATA_MASK;
500 bits |= BITS_DATA_8;
501 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
502 break;
503 }
504
505 switch (bits & BITS_PARITY_MASK) {
506 case BITS_PARITY_NONE:
507 dbg("%s - parity = NONE", __func__);
508 cflag &= ~PARENB;
509 break;
510 case BITS_PARITY_ODD:
511 dbg("%s - parity = ODD", __func__);
512 cflag |= (PARENB|PARODD);
513 break;
514 case BITS_PARITY_EVEN:
515 dbg("%s - parity = EVEN", __func__);
516 cflag &= ~PARODD;
517 cflag |= PARENB;
518 break;
519 case BITS_PARITY_MARK:
520 dbg("%s - parity = MARK (not supported, disabling parity)",
521 __func__);
522 cflag &= ~PARENB;
523 bits &= ~BITS_PARITY_MASK;
524 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
525 break;
526 case BITS_PARITY_SPACE:
527 dbg("%s - parity = SPACE (not supported, disabling parity)",
528 __func__);
529 cflag &= ~PARENB;
530 bits &= ~BITS_PARITY_MASK;
531 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
532 break;
533 default:
534 dbg("%s - Unknown parity mode, disabling parity", __func__);
535 cflag &= ~PARENB;
536 bits &= ~BITS_PARITY_MASK;
537 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
538 break;
539 }
540
541 cflag &= ~CSTOPB;
542 switch (bits & BITS_STOP_MASK) {
543 case BITS_STOP_1:
544 dbg("%s - stop bits = 1", __func__);
545 break;
546 case BITS_STOP_1_5:
547 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
548 __func__);
549 bits &= ~BITS_STOP_MASK;
550 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
551 break;
552 case BITS_STOP_2:
553 dbg("%s - stop bits = 2", __func__);
554 cflag |= CSTOPB;
555 break;
556 default:
557 dbg("%s - Unknown number of stop bits, using 1 stop bit",
558 __func__);
559 bits &= ~BITS_STOP_MASK;
560 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
561 break;
562 }
563
564 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
565 if (modem_ctl[0] & 0x0008) {
566 dbg("%s - flow control = CRTSCTS", __func__);
567 cflag |= CRTSCTS;
568 } else {
569 dbg("%s - flow control = NONE", __func__);
570 cflag &= ~CRTSCTS;
571 }
572
573 *cflagp = cflag;
574 }
575
576 static void cp210x_set_termios(struct tty_struct *tty,
577 struct usb_serial_port *port, struct ktermios *old_termios)
578 {
579 unsigned int cflag, old_cflag;
580 unsigned int baud = 0, bits;
581 unsigned int modem_ctl[4];
582
583 dbg("%s - port %d", __func__, port->number);
584
585 if (!tty)
586 return;
587
588 tty->termios->c_cflag &= ~CMSPAR;
589 cflag = tty->termios->c_cflag;
590 old_cflag = old_termios->c_cflag;
591 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
592
593 /* If the baud rate is to be updated*/
594 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
595 dbg("%s - Setting baud rate to %d baud", __func__,
596 baud);
597 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
598 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
599 dbg("Baud rate requested not supported by device");
600 baud = tty_termios_baud_rate(old_termios);
601 }
602 }
603 /* Report back the resulting baud rate */
604 tty_encode_baud_rate(tty, baud, baud);
605
606 /* If the number of data bits is to be updated */
607 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
608 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
609 bits &= ~BITS_DATA_MASK;
610 switch (cflag & CSIZE) {
611 case CS5:
612 bits |= BITS_DATA_5;
613 dbg("%s - data bits = 5", __func__);
614 break;
615 case CS6:
616 bits |= BITS_DATA_6;
617 dbg("%s - data bits = 6", __func__);
618 break;
619 case CS7:
620 bits |= BITS_DATA_7;
621 dbg("%s - data bits = 7", __func__);
622 break;
623 case CS8:
624 bits |= BITS_DATA_8;
625 dbg("%s - data bits = 8", __func__);
626 break;
627 /*case CS9:
628 bits |= BITS_DATA_9;
629 dbg("%s - data bits = 9", __func__);
630 break;*/
631 default:
632 dbg("cp210x driver does not "
633 "support the number of bits requested,"
634 " using 8 bit mode\n");
635 bits |= BITS_DATA_8;
636 break;
637 }
638 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
639 dbg("Number of data bits requested "
640 "not supported by device\n");
641 }
642
643 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
644 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
645 bits &= ~BITS_PARITY_MASK;
646 if (cflag & PARENB) {
647 if (cflag & PARODD) {
648 bits |= BITS_PARITY_ODD;
649 dbg("%s - parity = ODD", __func__);
650 } else {
651 bits |= BITS_PARITY_EVEN;
652 dbg("%s - parity = EVEN", __func__);
653 }
654 }
655 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
656 dbg("Parity mode not supported "
657 "by device\n");
658 }
659
660 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
661 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
662 bits &= ~BITS_STOP_MASK;
663 if (cflag & CSTOPB) {
664 bits |= BITS_STOP_2;
665 dbg("%s - stop bits = 2", __func__);
666 } else {
667 bits |= BITS_STOP_1;
668 dbg("%s - stop bits = 1", __func__);
669 }
670 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
671 dbg("Number of stop bits requested "
672 "not supported by device\n");
673 }
674
675 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
676 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
677 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
678 __func__, modem_ctl[0], modem_ctl[1],
679 modem_ctl[2], modem_ctl[3]);
680
681 if (cflag & CRTSCTS) {
682 modem_ctl[0] &= ~0x7B;
683 modem_ctl[0] |= 0x09;
684 modem_ctl[1] = 0x80;
685 dbg("%s - flow control = CRTSCTS", __func__);
686 } else {
687 modem_ctl[0] &= ~0x7B;
688 modem_ctl[0] |= 0x01;
689 modem_ctl[1] |= 0x40;
690 dbg("%s - flow control = NONE", __func__);
691 }
692
693 dbg("%s - write 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 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
697 }
698
699 }
700
701 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file,
702 unsigned int set, unsigned int clear)
703 {
704 struct usb_serial_port *port = tty->driver_data;
705 return cp210x_tiocmset_port(port, file, set, clear);
706 }
707
708 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file,
709 unsigned int set, unsigned int clear)
710 {
711 unsigned int control = 0;
712
713 dbg("%s - port %d", __func__, port->number);
714
715 if (set & TIOCM_RTS) {
716 control |= CONTROL_RTS;
717 control |= CONTROL_WRITE_RTS;
718 }
719 if (set & TIOCM_DTR) {
720 control |= CONTROL_DTR;
721 control |= CONTROL_WRITE_DTR;
722 }
723 if (clear & TIOCM_RTS) {
724 control &= ~CONTROL_RTS;
725 control |= CONTROL_WRITE_RTS;
726 }
727 if (clear & TIOCM_DTR) {
728 control &= ~CONTROL_DTR;
729 control |= CONTROL_WRITE_DTR;
730 }
731
732 dbg("%s - control = 0x%.4x", __func__, control);
733
734 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
735 }
736
737 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
738 {
739 if (on)
740 cp210x_tiocmset_port(p, NULL, TIOCM_DTR|TIOCM_RTS, 0);
741 else
742 cp210x_tiocmset_port(p, NULL, 0, TIOCM_DTR|TIOCM_RTS);
743 }
744
745 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file)
746 {
747 struct usb_serial_port *port = tty->driver_data;
748 unsigned int control;
749 int result;
750
751 dbg("%s - port %d", __func__, port->number);
752
753 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
754
755 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
756 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
757 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
758 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
759 |((control & CONTROL_RING)? TIOCM_RI : 0)
760 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
761
762 dbg("%s - control = 0x%.2x", __func__, control);
763
764 return result;
765 }
766
767 static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
768 {
769 struct usb_serial_port *port = tty->driver_data;
770 unsigned int state;
771
772 dbg("%s - port %d", __func__, port->number);
773 if (break_state == 0)
774 state = BREAK_OFF;
775 else
776 state = BREAK_ON;
777 dbg("%s - turning break %s", __func__,
778 state == BREAK_OFF ? "off" : "on");
779 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
780 }
781
782 static int cp210x_startup(struct usb_serial *serial)
783 {
784 /* cp210x buffers behave strangely unless device is reset */
785 usb_reset_device(serial->dev);
786 return 0;
787 }
788
789 static int __init cp210x_init(void)
790 {
791 int retval;
792
793 retval = usb_serial_register(&cp210x_device);
794 if (retval)
795 return retval; /* Failed to register */
796
797 retval = usb_register(&cp210x_driver);
798 if (retval) {
799 /* Failed to register */
800 usb_serial_deregister(&cp210x_device);
801 return retval;
802 }
803
804 /* Success */
805 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
806 DRIVER_DESC "\n");
807 return 0;
808 }
809
810 static void __exit cp210x_exit(void)
811 {
812 usb_deregister(&cp210x_driver);
813 usb_serial_deregister(&cp210x_device);
814 }
815
816 module_init(cp210x_init);
817 module_exit(cp210x_exit);
818
819 MODULE_DESCRIPTION(DRIVER_DESC);
820 MODULE_VERSION(DRIVER_VERSION);
821 MODULE_LICENSE("GPL");
822
823 module_param(debug, bool, S_IRUGO | S_IWUSR);
824 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");
Tomato firmware and modifications.