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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 */
36static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *);
37static void cp210x_close(struct usb_serial_port *);
38static void cp210x_get_termios(struct tty_struct *,
39 struct usb_serial_port *port);
40static void cp210x_get_termios_port(struct usb_serial_port *port,
41 unsigned int *cflagp, unsigned int *baudp);
42static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
43 struct ktermios*);
44static int cp210x_tiocmget(struct tty_struct *);
45static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
46static int cp210x_tiocmset_port(struct usb_serial_port *port,
47 unsigned int, unsigned int);
48static void cp210x_break_ctl(struct tty_struct *, int);
49static int cp210x_startup(struct usb_serial *);
50static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
51
52static int debug;
53
54static 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) }, /* Telegesis 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, 0x85EA) }, /* AC-Services IBUS-IF */
116 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
117 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
118 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
119 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
120 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
121 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
122 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
123 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
124 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
125 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
126 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
127 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
128 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
129 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
130 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
131 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
132 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
133 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
134 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
135 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
136 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
137 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
138 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
139 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
140 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
141 { } /* Terminating Entry */
142};
143
144MODULE_DEVICE_TABLE(usb, id_table);
145
146static struct usb_driver cp210x_driver = {
147 .name = "cp210x",
148 .probe = usb_serial_probe,
149 .disconnect = usb_serial_disconnect,
150 .id_table = id_table,
151 .no_dynamic_id = 1,
152};
153
154static struct usb_serial_driver cp210x_device = {
155 .driver = {
156 .owner = THIS_MODULE,
157 .name = "cp210x",
158 },
159 .usb_driver = &cp210x_driver,
160 .id_table = id_table,
161 .num_ports = 1,
162 .bulk_in_size = 256,
163 .bulk_out_size = 256,
164 .open = cp210x_open,
165 .close = cp210x_close,
166 .break_ctl = cp210x_break_ctl,
167 .set_termios = cp210x_set_termios,
168 .tiocmget = cp210x_tiocmget,
169 .tiocmset = cp210x_tiocmset,
170 .attach = cp210x_startup,
171 .dtr_rts = cp210x_dtr_rts
172};
173
174/* Config request types */
175#define REQTYPE_HOST_TO_DEVICE 0x41
176#define REQTYPE_DEVICE_TO_HOST 0xc1
177
178/* Config request codes */
179#define CP210X_IFC_ENABLE 0x00
180#define CP210X_SET_BAUDDIV 0x01
181#define CP210X_GET_BAUDDIV 0x02
182#define CP210X_SET_LINE_CTL 0x03
183#define CP210X_GET_LINE_CTL 0x04
184#define CP210X_SET_BREAK 0x05
185#define CP210X_IMM_CHAR 0x06
186#define CP210X_SET_MHS 0x07
187#define CP210X_GET_MDMSTS 0x08
188#define CP210X_SET_XON 0x09
189#define CP210X_SET_XOFF 0x0A
190#define CP210X_SET_EVENTMASK 0x0B
191#define CP210X_GET_EVENTMASK 0x0C
192#define CP210X_SET_CHAR 0x0D
193#define CP210X_GET_CHARS 0x0E
194#define CP210X_GET_PROPS 0x0F
195#define CP210X_GET_COMM_STATUS 0x10
196#define CP210X_RESET 0x11
197#define CP210X_PURGE 0x12
198#define CP210X_SET_FLOW 0x13
199#define CP210X_GET_FLOW 0x14
200#define CP210X_EMBED_EVENTS 0x15
201#define CP210X_GET_EVENTSTATE 0x16
202#define CP210X_SET_CHARS 0x19
203
204/* CP210X_IFC_ENABLE */
205#define UART_ENABLE 0x0001
206#define UART_DISABLE 0x0000
207
208/* CP210X_(SET|GET)_BAUDDIV */
209#define BAUD_RATE_GEN_FREQ 0x384000
210
211/* CP210X_(SET|GET)_LINE_CTL */
212#define BITS_DATA_MASK 0X0f00
213#define BITS_DATA_5 0X0500
214#define BITS_DATA_6 0X0600
215#define BITS_DATA_7 0X0700
216#define BITS_DATA_8 0X0800
217#define BITS_DATA_9 0X0900
218
219#define BITS_PARITY_MASK 0x00f0
220#define BITS_PARITY_NONE 0x0000
221#define BITS_PARITY_ODD 0x0010
222#define BITS_PARITY_EVEN 0x0020
223#define BITS_PARITY_MARK 0x0030
224#define BITS_PARITY_SPACE 0x0040
225
226#define BITS_STOP_MASK 0x000f
227#define BITS_STOP_1 0x0000
228#define BITS_STOP_1_5 0x0001
229#define BITS_STOP_2 0x0002
230
231/* CP210X_SET_BREAK */
232#define BREAK_ON 0x0001
233#define BREAK_OFF 0x0000
234
235/* CP210X_(SET_MHS|GET_MDMSTS) */
236#define CONTROL_DTR 0x0001
237#define CONTROL_RTS 0x0002
238#define CONTROL_CTS 0x0010
239#define CONTROL_DSR 0x0020
240#define CONTROL_RING 0x0040
241#define CONTROL_DCD 0x0080
242#define CONTROL_WRITE_DTR 0x0100
243#define CONTROL_WRITE_RTS 0x0200
244
245/*
246 * cp210x_get_config
247 * Reads from the CP210x configuration registers
248 * 'size' is specified in bytes.
249 * 'data' is a pointer to a pre-allocated array of integers large
250 * enough to hold 'size' bytes (with 4 bytes to each integer)
251 */
252static int cp210x_get_config(struct usb_serial_port *port, u8 request,
253 unsigned int *data, int size)
254{
255 struct usb_serial *serial = port->serial;
256 __le32 *buf;
257 int result, i, length;
258
259 /* Number of integers required to contain the array */
260 length = (((size - 1) | 3) + 1)/4;
261
262 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
263 if (!buf) {
264 dev_err(&port->dev, "%s - out of memory.\n", __func__);
265 return -ENOMEM;
266 }
267
268 /* Issue the request, attempting to read 'size' bytes */
269 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
270 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
271 0, buf, size, 300);
272
273 /* Convert data into an array of integers */
274 for (i = 0; i < length; i++)
275 data[i] = le32_to_cpu(buf[i]);
276
277 kfree(buf);
278
279 if (result != size) {
280 dbg("%s - Unable to send config request, "
281 "request=0x%x size=%d result=%d\n",
282 __func__, request, size, result);
283 return -EPROTO;
284 }
285
286 return 0;
287}
288
289/*
290 * cp210x_set_config
291 * Writes to the CP210x configuration registers
292 * Values less than 16 bits wide are sent directly
293 * 'size' is specified in bytes.
294 */
295static int cp210x_set_config(struct usb_serial_port *port, u8 request,
296 unsigned int *data, int size)
297{
298 struct usb_serial *serial = port->serial;
299 __le32 *buf;
300 int result, i, length;
301
302 /* Number of integers required to contain the array */
303 length = (((size - 1) | 3) + 1)/4;
304
305 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
306 if (!buf) {
307 dev_err(&port->dev, "%s - out of memory.\n",
308 __func__);
309 return -ENOMEM;
310 }
311
312 /* Array of integers into bytes */
313 for (i = 0; i < length; i++)
314 buf[i] = cpu_to_le32(data[i]);
315
316 if (size > 2) {
317 result = usb_control_msg(serial->dev,
318 usb_sndctrlpipe(serial->dev, 0),
319 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
320 0, buf, size, 300);
321 } else {
322 result = usb_control_msg(serial->dev,
323 usb_sndctrlpipe(serial->dev, 0),
324 request, REQTYPE_HOST_TO_DEVICE, data[0],
325 0, NULL, 0, 300);
326 }
327
328 kfree(buf);
329
330 if ((size > 2 && result != size) || result < 0) {
331 dbg("%s - Unable to send request, "
332 "request=0x%x size=%d result=%d\n",
333 __func__, request, size, result);
334 return -EPROTO;
335 }
336
337 return 0;
338}
339
340/*
341 * cp210x_set_config_single
342 * Convenience function for calling cp210x_set_config on single data values
343 * without requiring an integer pointer
344 */
345static inline int cp210x_set_config_single(struct usb_serial_port *port,
346 u8 request, unsigned int data)
347{
348 return cp210x_set_config(port, request, &data, 2);
349}
350
351/*
352 * cp210x_quantise_baudrate
353 * Quantises the baud rate as per AN205 Table 1
354 */
355static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
356 if (baud <= 56) baud = 0;
357 else if (baud <= 300) baud = 300;
358 else if (baud <= 600) baud = 600;
359 else if (baud <= 1200) baud = 1200;
360 else if (baud <= 1800) baud = 1800;
361 else if (baud <= 2400) baud = 2400;
362 else if (baud <= 4000) baud = 4000;
363 else if (baud <= 4803) baud = 4800;
364 else if (baud <= 7207) baud = 7200;
365 else if (baud <= 9612) baud = 9600;
366 else if (baud <= 14428) baud = 14400;
367 else if (baud <= 16062) baud = 16000;
368 else if (baud <= 19250) baud = 19200;
369 else if (baud <= 28912) baud = 28800;
370 else if (baud <= 38601) baud = 38400;
371 else if (baud <= 51558) baud = 51200;
372 else if (baud <= 56280) baud = 56000;
373 else if (baud <= 58053) baud = 57600;
374 else if (baud <= 64111) baud = 64000;
375 else if (baud <= 77608) baud = 76800;
376 else if (baud <= 117028) baud = 115200;
377 else if (baud <= 129347) baud = 128000;
378 else if (baud <= 156868) baud = 153600;
379 else if (baud <= 237832) baud = 230400;
380 else if (baud <= 254234) baud = 250000;
381 else if (baud <= 273066) baud = 256000;
382 else if (baud <= 491520) baud = 460800;
383 else if (baud <= 567138) baud = 500000;
384 else if (baud <= 670254) baud = 576000;
385 else if (baud <= 1053257) baud = 921600;
386 else if (baud <= 1474560) baud = 1228800;
387 else if (baud <= 2457600) baud = 1843200;
388 else baud = 3686400;
389 return baud;
390}
391
392static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
393{
394 int result;
395
396 dbg("%s - port %d", __func__, port->number);
397
398 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
399 dev_err(&port->dev, "%s - Unable to enable UART\n",
400 __func__);
401 return -EPROTO;
402 }
403
404 result = usb_serial_generic_open(tty, port);
405 if (result)
406 return result;
407
408 /* Configure the termios structure */
409 cp210x_get_termios(tty, port);
410 return 0;
411}
412
413static void cp210x_close(struct usb_serial_port *port)
414{
415 dbg("%s - port %d", __func__, port->number);
416
417 usb_serial_generic_close(port);
418
419 mutex_lock(&port->serial->disc_mutex);
420 if (!port->serial->disconnected)
421 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
422 mutex_unlock(&port->serial->disc_mutex);
423}
424
425/*
426 * cp210x_get_termios
427 * Reads the baud rate, data bits, parity, stop bits and flow control mode
428 * from the device, corrects any unsupported values, and configures the
429 * termios structure to reflect the state of the device
430 */
431static void cp210x_get_termios(struct tty_struct *tty,
432 struct usb_serial_port *port)
433{
434 unsigned int baud;
435
436 if (tty) {
437 cp210x_get_termios_port(tty->driver_data,
438 &tty->termios->c_cflag, &baud);
439 tty_encode_baud_rate(tty, baud, baud);
440 }
441
442 else {
443 unsigned int cflag;
444 cflag = 0;
445 cp210x_get_termios_port(port, &cflag, &baud);
446 }
447}
448
449/*
450 * cp210x_get_termios_port
451 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
452 */
453static void cp210x_get_termios_port(struct usb_serial_port *port,
454 unsigned int *cflagp, unsigned int *baudp)
455{
456 unsigned int cflag, modem_ctl[4];
457 unsigned int baud;
458 unsigned int bits;
459
460 dbg("%s - port %d", __func__, port->number);
461
462 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
463 /* Convert to baudrate */
464 if (baud)
465 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
466
467 dbg("%s - baud rate = %d", __func__, baud);
468 *baudp = baud;
469
470 cflag = *cflagp;
471
472 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
473 cflag &= ~CSIZE;
474 switch (bits & BITS_DATA_MASK) {
475 case BITS_DATA_5:
476 dbg("%s - data bits = 5", __func__);
477 cflag |= CS5;
478 break;
479 case BITS_DATA_6:
480 dbg("%s - data bits = 6", __func__);
481 cflag |= CS6;
482 break;
483 case BITS_DATA_7:
484 dbg("%s - data bits = 7", __func__);
485 cflag |= CS7;
486 break;
487 case BITS_DATA_8:
488 dbg("%s - data bits = 8", __func__);
489 cflag |= CS8;
490 break;
491 case BITS_DATA_9:
492 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
493 __func__);
494 cflag |= CS8;
495 bits &= ~BITS_DATA_MASK;
496 bits |= BITS_DATA_8;
497 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
498 break;
499 default:
500 dbg("%s - Unknown number of data bits, using 8", __func__);
501 cflag |= CS8;
502 bits &= ~BITS_DATA_MASK;
503 bits |= BITS_DATA_8;
504 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
505 break;
506 }
507
508 switch (bits & BITS_PARITY_MASK) {
509 case BITS_PARITY_NONE:
510 dbg("%s - parity = NONE", __func__);
511 cflag &= ~PARENB;
512 break;
513 case BITS_PARITY_ODD:
514 dbg("%s - parity = ODD", __func__);
515 cflag |= (PARENB|PARODD);
516 break;
517 case BITS_PARITY_EVEN:
518 dbg("%s - parity = EVEN", __func__);
519 cflag &= ~PARODD;
520 cflag |= PARENB;
521 break;
522 case BITS_PARITY_MARK:
523 dbg("%s - parity = MARK (not supported, disabling parity)",
524 __func__);
525 cflag &= ~PARENB;
526 bits &= ~BITS_PARITY_MASK;
527 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
528 break;
529 case BITS_PARITY_SPACE:
530 dbg("%s - parity = SPACE (not supported, disabling parity)",
531 __func__);
532 cflag &= ~PARENB;
533 bits &= ~BITS_PARITY_MASK;
534 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
535 break;
536 default:
537 dbg("%s - Unknown parity mode, disabling parity", __func__);
538 cflag &= ~PARENB;
539 bits &= ~BITS_PARITY_MASK;
540 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
541 break;
542 }
543
544 cflag &= ~CSTOPB;
545 switch (bits & BITS_STOP_MASK) {
546 case BITS_STOP_1:
547 dbg("%s - stop bits = 1", __func__);
548 break;
549 case BITS_STOP_1_5:
550 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
551 __func__);
552 bits &= ~BITS_STOP_MASK;
553 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
554 break;
555 case BITS_STOP_2:
556 dbg("%s - stop bits = 2", __func__);
557 cflag |= CSTOPB;
558 break;
559 default:
560 dbg("%s - Unknown number of stop bits, using 1 stop bit",
561 __func__);
562 bits &= ~BITS_STOP_MASK;
563 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
564 break;
565 }
566
567 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
568 if (modem_ctl[0] & 0x0008) {
569 dbg("%s - flow control = CRTSCTS", __func__);
570 cflag |= CRTSCTS;
571 } else {
572 dbg("%s - flow control = NONE", __func__);
573 cflag &= ~CRTSCTS;
574 }
575
576 *cflagp = cflag;
577}
578
579static void cp210x_set_termios(struct tty_struct *tty,
580 struct usb_serial_port *port, struct ktermios *old_termios)
581{
582 unsigned int cflag, old_cflag;
583 unsigned int baud = 0, bits;
584 unsigned int modem_ctl[4];
585
586 dbg("%s - port %d", __func__, port->number);
587
588 if (!tty)
589 return;
590
591 tty->termios->c_cflag &= ~CMSPAR;
592 cflag = tty->termios->c_cflag;
593 old_cflag = old_termios->c_cflag;
594 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
595
596 /* If the baud rate is to be updated*/
597 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
598 dbg("%s - Setting baud rate to %d baud", __func__,
599 baud);
600 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
601 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
602 dbg("Baud rate requested not supported by device");
603 baud = tty_termios_baud_rate(old_termios);
604 }
605 }
606 /* Report back the resulting baud rate */
607 tty_encode_baud_rate(tty, baud, baud);
608
609 /* If the number of data bits is to be updated */
610 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
611 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
612 bits &= ~BITS_DATA_MASK;
613 switch (cflag & CSIZE) {
614 case CS5:
615 bits |= BITS_DATA_5;
616 dbg("%s - data bits = 5", __func__);
617 break;
618 case CS6:
619 bits |= BITS_DATA_6;
620 dbg("%s - data bits = 6", __func__);
621 break;
622 case CS7:
623 bits |= BITS_DATA_7;
624 dbg("%s - data bits = 7", __func__);
625 break;
626 case CS8:
627 bits |= BITS_DATA_8;
628 dbg("%s - data bits = 8", __func__);
629 break;
630 /*case CS9:
631 bits |= BITS_DATA_9;
632 dbg("%s - data bits = 9", __func__);
633 break;*/
634 default:
635 dbg("cp210x driver does not "
636 "support the number of bits requested,"
637 " using 8 bit mode\n");
638 bits |= BITS_DATA_8;
639 break;
640 }
641 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
642 dbg("Number of data bits requested "
643 "not supported by device\n");
644 }
645
646 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
647 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
648 bits &= ~BITS_PARITY_MASK;
649 if (cflag & PARENB) {
650 if (cflag & PARODD) {
651 bits |= BITS_PARITY_ODD;
652 dbg("%s - parity = ODD", __func__);
653 } else {
654 bits |= BITS_PARITY_EVEN;
655 dbg("%s - parity = EVEN", __func__);
656 }
657 }
658 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
659 dbg("Parity mode not supported "
660 "by device\n");
661 }
662
663 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
664 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
665 bits &= ~BITS_STOP_MASK;
666 if (cflag & CSTOPB) {
667 bits |= BITS_STOP_2;
668 dbg("%s - stop bits = 2", __func__);
669 } else {
670 bits |= BITS_STOP_1;
671 dbg("%s - stop bits = 1", __func__);
672 }
673 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
674 dbg("Number of stop bits requested "
675 "not supported by device\n");
676 }
677
678 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
679 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
680 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
681 __func__, modem_ctl[0], modem_ctl[1],
682 modem_ctl[2], modem_ctl[3]);
683
684 if (cflag & CRTSCTS) {
685 modem_ctl[0] &= ~0x7B;
686 modem_ctl[0] |= 0x09;
687 modem_ctl[1] = 0x80;
688 dbg("%s - flow control = CRTSCTS", __func__);
689 } else {
690 modem_ctl[0] &= ~0x7B;
691 modem_ctl[0] |= 0x01;
692 modem_ctl[1] |= 0x40;
693 dbg("%s - flow control = NONE", __func__);
694 }
695
696 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
697 __func__, modem_ctl[0], modem_ctl[1],
698 modem_ctl[2], modem_ctl[3]);
699 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
700 }
701
702}
703
704static int cp210x_tiocmset (struct tty_struct *tty,
705 unsigned int set, unsigned int clear)
706{
707 struct usb_serial_port *port = tty->driver_data;
708 return cp210x_tiocmset_port(port, set, clear);
709}
710
711static int cp210x_tiocmset_port(struct usb_serial_port *port,
712 unsigned int set, unsigned int clear)
713{
714 unsigned int control = 0;
715
716 dbg("%s - port %d", __func__, port->number);
717
718 if (set & TIOCM_RTS) {
719 control |= CONTROL_RTS;
720 control |= CONTROL_WRITE_RTS;
721 }
722 if (set & TIOCM_DTR) {
723 control |= CONTROL_DTR;
724 control |= CONTROL_WRITE_DTR;
725 }
726 if (clear & TIOCM_RTS) {
727 control &= ~CONTROL_RTS;
728 control |= CONTROL_WRITE_RTS;
729 }
730 if (clear & TIOCM_DTR) {
731 control &= ~CONTROL_DTR;
732 control |= CONTROL_WRITE_DTR;
733 }
734
735 dbg("%s - control = 0x%.4x", __func__, control);
736
737 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
738}
739
740static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
741{
742 if (on)
743 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
744 else
745 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
746}
747
748static int cp210x_tiocmget (struct tty_struct *tty)
749{
750 struct usb_serial_port *port = tty->driver_data;
751 unsigned int control;
752 int result;
753
754 dbg("%s - port %d", __func__, port->number);
755
756 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
757
758 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
759 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
760 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
761 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
762 |((control & CONTROL_RING)? TIOCM_RI : 0)
763 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
764
765 dbg("%s - control = 0x%.2x", __func__, control);
766
767 return result;
768}
769
770static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
771{
772 struct usb_serial_port *port = tty->driver_data;
773 unsigned int state;
774
775 dbg("%s - port %d", __func__, port->number);
776 if (break_state == 0)
777 state = BREAK_OFF;
778 else
779 state = BREAK_ON;
780 dbg("%s - turning break %s", __func__,
781 state == BREAK_OFF ? "off" : "on");
782 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
783}
784
785static int cp210x_startup(struct usb_serial *serial)
786{
787 /* cp210x buffers behave strangely unless device is reset */
788 usb_reset_device(serial->dev);
789 return 0;
790}
791
792static int __init cp210x_init(void)
793{
794 int retval;
795
796 retval = usb_serial_register(&cp210x_device);
797 if (retval)
798 return retval; /* Failed to register */
799
800 retval = usb_register(&cp210x_driver);
801 if (retval) {
802 /* Failed to register */
803 usb_serial_deregister(&cp210x_device);
804 return retval;
805 }
806
807 /* Success */
808 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
809 DRIVER_DESC "\n");
810 return 0;
811}
812
813static void __exit cp210x_exit(void)
814{
815 usb_deregister(&cp210x_driver);
816 usb_serial_deregister(&cp210x_device);
817}
818
819module_init(cp210x_init);
820module_exit(cp210x_exit);
821
822MODULE_DESCRIPTION(DRIVER_DESC);
823MODULE_VERSION(DRIVER_VERSION);
824MODULE_LICENSE("GPL");
825
826module_param(debug, bool, S_IRUGO | S_IWUSR);
827MODULE_PARM_DESC(debug, "Enable verbose debugging messages");
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#define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
28
29/*
30 * Function Prototypes
31 */
32static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *);
33static void cp210x_close(struct usb_serial_port *);
34static void cp210x_get_termios(struct tty_struct *, struct usb_serial_port *);
35static void cp210x_get_termios_port(struct usb_serial_port *port,
36 unsigned int *cflagp, unsigned int *baudp);
37static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *,
38 struct ktermios *);
39static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
40 struct ktermios*);
41static int cp210x_tiocmget(struct tty_struct *);
42static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
43static int cp210x_tiocmset_port(struct usb_serial_port *port,
44 unsigned int, unsigned int);
45static void cp210x_break_ctl(struct tty_struct *, int);
46static int cp210x_startup(struct usb_serial *);
47static void cp210x_release(struct usb_serial *);
48static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
49
50static const struct usb_device_id id_table[] = {
51 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
52 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
53 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
54 { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
55 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
56 { USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */
57 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
58 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
59 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
60 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
61 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
62 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
63 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
64 { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
65 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
66 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
67 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
68 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
69 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
70 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
71 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
72 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
73 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
74 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
75 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
76 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
77 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
78 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
79 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
80 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
81 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
82 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
83 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
84 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
85 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
86 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
87 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
88 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
89 { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */
90 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
91 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
92 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
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, 0x81A9) }, /* Multiplex RC Interface */
97 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
98 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
99 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
100 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
101 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
102 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
103 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
104 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
105 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
106 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
107 { USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */
108 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
109 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
110 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
111 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
112 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
113 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
114 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
115 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
116 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
117 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
118 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
119 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
120 { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
121 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
122 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
123 { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
124 { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
125 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
126 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
127 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
128 { USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */
129 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
130 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
131 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
132 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
133 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
134 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
135 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
136 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
137 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
138 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
139 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
140 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
141 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
142 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
143 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
144 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
145 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
146 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
147 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
148 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
149 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
150 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
151 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
152 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
153 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
154 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
155 { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
156 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
157 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
158 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
159 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */
160 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */
161 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */
162 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */
163 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */
164 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */
165 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */
166 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */
167 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */
168 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */
169 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */
170 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */
171 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */
172 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */
173 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */
174 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */
175 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
176 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */
177 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */
178 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
179 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
180 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
181 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
182 { } /* Terminating Entry */
183};
184
185MODULE_DEVICE_TABLE(usb, id_table);
186
187struct cp210x_serial_private {
188 __u8 bInterfaceNumber;
189};
190
191static struct usb_serial_driver cp210x_device = {
192 .driver = {
193 .owner = THIS_MODULE,
194 .name = "cp210x",
195 },
196 .id_table = id_table,
197 .num_ports = 1,
198 .bulk_in_size = 256,
199 .bulk_out_size = 256,
200 .open = cp210x_open,
201 .close = cp210x_close,
202 .break_ctl = cp210x_break_ctl,
203 .set_termios = cp210x_set_termios,
204 .tiocmget = cp210x_tiocmget,
205 .tiocmset = cp210x_tiocmset,
206 .attach = cp210x_startup,
207 .release = cp210x_release,
208 .dtr_rts = cp210x_dtr_rts
209};
210
211static struct usb_serial_driver * const serial_drivers[] = {
212 &cp210x_device, NULL
213};
214
215/* Config request types */
216#define REQTYPE_HOST_TO_INTERFACE 0x41
217#define REQTYPE_INTERFACE_TO_HOST 0xc1
218#define REQTYPE_HOST_TO_DEVICE 0x40
219#define REQTYPE_DEVICE_TO_HOST 0xc0
220
221/* Config request codes */
222#define CP210X_IFC_ENABLE 0x00
223#define CP210X_SET_BAUDDIV 0x01
224#define CP210X_GET_BAUDDIV 0x02
225#define CP210X_SET_LINE_CTL 0x03
226#define CP210X_GET_LINE_CTL 0x04
227#define CP210X_SET_BREAK 0x05
228#define CP210X_IMM_CHAR 0x06
229#define CP210X_SET_MHS 0x07
230#define CP210X_GET_MDMSTS 0x08
231#define CP210X_SET_XON 0x09
232#define CP210X_SET_XOFF 0x0A
233#define CP210X_SET_EVENTMASK 0x0B
234#define CP210X_GET_EVENTMASK 0x0C
235#define CP210X_SET_CHAR 0x0D
236#define CP210X_GET_CHARS 0x0E
237#define CP210X_GET_PROPS 0x0F
238#define CP210X_GET_COMM_STATUS 0x10
239#define CP210X_RESET 0x11
240#define CP210X_PURGE 0x12
241#define CP210X_SET_FLOW 0x13
242#define CP210X_GET_FLOW 0x14
243#define CP210X_EMBED_EVENTS 0x15
244#define CP210X_GET_EVENTSTATE 0x16
245#define CP210X_SET_CHARS 0x19
246#define CP210X_GET_BAUDRATE 0x1D
247#define CP210X_SET_BAUDRATE 0x1E
248
249/* CP210X_IFC_ENABLE */
250#define UART_ENABLE 0x0001
251#define UART_DISABLE 0x0000
252
253/* CP210X_(SET|GET)_BAUDDIV */
254#define BAUD_RATE_GEN_FREQ 0x384000
255
256/* CP210X_(SET|GET)_LINE_CTL */
257#define BITS_DATA_MASK 0X0f00
258#define BITS_DATA_5 0X0500
259#define BITS_DATA_6 0X0600
260#define BITS_DATA_7 0X0700
261#define BITS_DATA_8 0X0800
262#define BITS_DATA_9 0X0900
263
264#define BITS_PARITY_MASK 0x00f0
265#define BITS_PARITY_NONE 0x0000
266#define BITS_PARITY_ODD 0x0010
267#define BITS_PARITY_EVEN 0x0020
268#define BITS_PARITY_MARK 0x0030
269#define BITS_PARITY_SPACE 0x0040
270
271#define BITS_STOP_MASK 0x000f
272#define BITS_STOP_1 0x0000
273#define BITS_STOP_1_5 0x0001
274#define BITS_STOP_2 0x0002
275
276/* CP210X_SET_BREAK */
277#define BREAK_ON 0x0001
278#define BREAK_OFF 0x0000
279
280/* CP210X_(SET_MHS|GET_MDMSTS) */
281#define CONTROL_DTR 0x0001
282#define CONTROL_RTS 0x0002
283#define CONTROL_CTS 0x0010
284#define CONTROL_DSR 0x0020
285#define CONTROL_RING 0x0040
286#define CONTROL_DCD 0x0080
287#define CONTROL_WRITE_DTR 0x0100
288#define CONTROL_WRITE_RTS 0x0200
289
290/*
291 * cp210x_get_config
292 * Reads from the CP210x configuration registers
293 * 'size' is specified in bytes.
294 * 'data' is a pointer to a pre-allocated array of integers large
295 * enough to hold 'size' bytes (with 4 bytes to each integer)
296 */
297static int cp210x_get_config(struct usb_serial_port *port, u8 request,
298 unsigned int *data, int size)
299{
300 struct usb_serial *serial = port->serial;
301 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
302 __le32 *buf;
303 int result, i, length;
304
305 /* Number of integers required to contain the array */
306 length = (((size - 1) | 3) + 1) / 4;
307
308 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
309 if (!buf)
310 return -ENOMEM;
311
312 /* Issue the request, attempting to read 'size' bytes */
313 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
314 request, REQTYPE_INTERFACE_TO_HOST, 0x0000,
315 spriv->bInterfaceNumber, buf, size,
316 USB_CTRL_GET_TIMEOUT);
317
318 /* Convert data into an array of integers */
319 for (i = 0; i < length; i++)
320 data[i] = le32_to_cpu(buf[i]);
321
322 kfree(buf);
323
324 if (result != size) {
325 dev_dbg(&port->dev, "%s - Unable to send config request, request=0x%x size=%d result=%d\n",
326 __func__, request, size, result);
327 if (result > 0)
328 result = -EPROTO;
329
330 return result;
331 }
332
333 return 0;
334}
335
336/*
337 * cp210x_set_config
338 * Writes to the CP210x configuration registers
339 * Values less than 16 bits wide are sent directly
340 * 'size' is specified in bytes.
341 */
342static int cp210x_set_config(struct usb_serial_port *port, u8 request,
343 unsigned int *data, int size)
344{
345 struct usb_serial *serial = port->serial;
346 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
347 __le32 *buf;
348 int result, i, length;
349
350 /* Number of integers required to contain the array */
351 length = (((size - 1) | 3) + 1) / 4;
352
353 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
354 if (!buf)
355 return -ENOMEM;
356
357 /* Array of integers into bytes */
358 for (i = 0; i < length; i++)
359 buf[i] = cpu_to_le32(data[i]);
360
361 if (size > 2) {
362 result = usb_control_msg(serial->dev,
363 usb_sndctrlpipe(serial->dev, 0),
364 request, REQTYPE_HOST_TO_INTERFACE, 0x0000,
365 spriv->bInterfaceNumber, buf, size,
366 USB_CTRL_SET_TIMEOUT);
367 } else {
368 result = usb_control_msg(serial->dev,
369 usb_sndctrlpipe(serial->dev, 0),
370 request, REQTYPE_HOST_TO_INTERFACE, data[0],
371 spriv->bInterfaceNumber, NULL, 0,
372 USB_CTRL_SET_TIMEOUT);
373 }
374
375 kfree(buf);
376
377 if ((size > 2 && result != size) || result < 0) {
378 dev_dbg(&port->dev, "%s - Unable to send request, request=0x%x size=%d result=%d\n",
379 __func__, request, size, result);
380 if (result > 0)
381 result = -EPROTO;
382
383 return result;
384 }
385
386 return 0;
387}
388
389/*
390 * cp210x_set_config_single
391 * Convenience function for calling cp210x_set_config on single data values
392 * without requiring an integer pointer
393 */
394static inline int cp210x_set_config_single(struct usb_serial_port *port,
395 u8 request, unsigned int data)
396{
397 return cp210x_set_config(port, request, &data, 2);
398}
399
400/*
401 * cp210x_quantise_baudrate
402 * Quantises the baud rate as per AN205 Table 1
403 */
404static unsigned int cp210x_quantise_baudrate(unsigned int baud)
405{
406 if (baud <= 300)
407 baud = 300;
408 else if (baud <= 600) baud = 600;
409 else if (baud <= 1200) baud = 1200;
410 else if (baud <= 1800) baud = 1800;
411 else if (baud <= 2400) baud = 2400;
412 else if (baud <= 4000) baud = 4000;
413 else if (baud <= 4803) baud = 4800;
414 else if (baud <= 7207) baud = 7200;
415 else if (baud <= 9612) baud = 9600;
416 else if (baud <= 14428) baud = 14400;
417 else if (baud <= 16062) baud = 16000;
418 else if (baud <= 19250) baud = 19200;
419 else if (baud <= 28912) baud = 28800;
420 else if (baud <= 38601) baud = 38400;
421 else if (baud <= 51558) baud = 51200;
422 else if (baud <= 56280) baud = 56000;
423 else if (baud <= 58053) baud = 57600;
424 else if (baud <= 64111) baud = 64000;
425 else if (baud <= 77608) baud = 76800;
426 else if (baud <= 117028) baud = 115200;
427 else if (baud <= 129347) baud = 128000;
428 else if (baud <= 156868) baud = 153600;
429 else if (baud <= 237832) baud = 230400;
430 else if (baud <= 254234) baud = 250000;
431 else if (baud <= 273066) baud = 256000;
432 else if (baud <= 491520) baud = 460800;
433 else if (baud <= 567138) baud = 500000;
434 else if (baud <= 670254) baud = 576000;
435 else if (baud < 1000000)
436 baud = 921600;
437 else if (baud > 2000000)
438 baud = 2000000;
439 return baud;
440}
441
442static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
443{
444 int result;
445
446 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE,
447 UART_ENABLE);
448 if (result) {
449 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
450 return result;
451 }
452
453 /* Configure the termios structure */
454 cp210x_get_termios(tty, port);
455
456 /* The baud rate must be initialised on cp2104 */
457 if (tty)
458 cp210x_change_speed(tty, port, NULL);
459
460 return usb_serial_generic_open(tty, port);
461}
462
463static void cp210x_close(struct usb_serial_port *port)
464{
465 usb_serial_generic_close(port);
466 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
467}
468
469/*
470 * cp210x_get_termios
471 * Reads the baud rate, data bits, parity, stop bits and flow control mode
472 * from the device, corrects any unsupported values, and configures the
473 * termios structure to reflect the state of the device
474 */
475static void cp210x_get_termios(struct tty_struct *tty,
476 struct usb_serial_port *port)
477{
478 unsigned int baud;
479
480 if (tty) {
481 cp210x_get_termios_port(tty->driver_data,
482 &tty->termios.c_cflag, &baud);
483 tty_encode_baud_rate(tty, baud, baud);
484 } else {
485 unsigned int cflag;
486 cflag = 0;
487 cp210x_get_termios_port(port, &cflag, &baud);
488 }
489}
490
491/*
492 * cp210x_get_termios_port
493 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
494 */
495static void cp210x_get_termios_port(struct usb_serial_port *port,
496 unsigned int *cflagp, unsigned int *baudp)
497{
498 struct device *dev = &port->dev;
499 unsigned int cflag, modem_ctl[4];
500 unsigned int baud;
501 unsigned int bits;
502
503 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4);
504
505 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
506 *baudp = baud;
507
508 cflag = *cflagp;
509
510 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
511 cflag &= ~CSIZE;
512 switch (bits & BITS_DATA_MASK) {
513 case BITS_DATA_5:
514 dev_dbg(dev, "%s - data bits = 5\n", __func__);
515 cflag |= CS5;
516 break;
517 case BITS_DATA_6:
518 dev_dbg(dev, "%s - data bits = 6\n", __func__);
519 cflag |= CS6;
520 break;
521 case BITS_DATA_7:
522 dev_dbg(dev, "%s - data bits = 7\n", __func__);
523 cflag |= CS7;
524 break;
525 case BITS_DATA_8:
526 dev_dbg(dev, "%s - data bits = 8\n", __func__);
527 cflag |= CS8;
528 break;
529 case BITS_DATA_9:
530 dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__);
531 cflag |= CS8;
532 bits &= ~BITS_DATA_MASK;
533 bits |= BITS_DATA_8;
534 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
535 break;
536 default:
537 dev_dbg(dev, "%s - Unknown number of data bits, using 8\n", __func__);
538 cflag |= CS8;
539 bits &= ~BITS_DATA_MASK;
540 bits |= BITS_DATA_8;
541 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
542 break;
543 }
544
545 switch (bits & BITS_PARITY_MASK) {
546 case BITS_PARITY_NONE:
547 dev_dbg(dev, "%s - parity = NONE\n", __func__);
548 cflag &= ~PARENB;
549 break;
550 case BITS_PARITY_ODD:
551 dev_dbg(dev, "%s - parity = ODD\n", __func__);
552 cflag |= (PARENB|PARODD);
553 break;
554 case BITS_PARITY_EVEN:
555 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
556 cflag &= ~PARODD;
557 cflag |= PARENB;
558 break;
559 case BITS_PARITY_MARK:
560 dev_dbg(dev, "%s - parity = MARK\n", __func__);
561 cflag |= (PARENB|PARODD|CMSPAR);
562 break;
563 case BITS_PARITY_SPACE:
564 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
565 cflag &= ~PARODD;
566 cflag |= (PARENB|CMSPAR);
567 break;
568 default:
569 dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __func__);
570 cflag &= ~PARENB;
571 bits &= ~BITS_PARITY_MASK;
572 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
573 break;
574 }
575
576 cflag &= ~CSTOPB;
577 switch (bits & BITS_STOP_MASK) {
578 case BITS_STOP_1:
579 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
580 break;
581 case BITS_STOP_1_5:
582 dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__);
583 bits &= ~BITS_STOP_MASK;
584 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
585 break;
586 case BITS_STOP_2:
587 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
588 cflag |= CSTOPB;
589 break;
590 default:
591 dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__);
592 bits &= ~BITS_STOP_MASK;
593 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
594 break;
595 }
596
597 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
598 if (modem_ctl[0] & 0x0008) {
599 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
600 cflag |= CRTSCTS;
601 } else {
602 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
603 cflag &= ~CRTSCTS;
604 }
605
606 *cflagp = cflag;
607}
608
609/*
610 * CP2101 supports the following baud rates:
611 *
612 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
613 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
614 *
615 * CP2102 and CP2103 support the following additional rates:
616 *
617 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
618 * 576000
619 *
620 * The device will map a requested rate to a supported one, but the result
621 * of requests for rates greater than 1053257 is undefined (see AN205).
622 *
623 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
624 * respectively, with an error less than 1%. The actual rates are determined
625 * by
626 *
627 * div = round(freq / (2 x prescale x request))
628 * actual = freq / (2 x prescale x div)
629 *
630 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
631 * or 1 otherwise.
632 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
633 * otherwise.
634 */
635static void cp210x_change_speed(struct tty_struct *tty,
636 struct usb_serial_port *port, struct ktermios *old_termios)
637{
638 u32 baud;
639
640 baud = tty->termios.c_ospeed;
641
642 /* This maps the requested rate to a rate valid on cp2102 or cp2103,
643 * or to an arbitrary rate in [1M,2M].
644 *
645 * NOTE: B0 is not implemented.
646 */
647 baud = cp210x_quantise_baudrate(baud);
648
649 dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud);
650 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud,
651 sizeof(baud))) {
652 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud);
653 if (old_termios)
654 baud = old_termios->c_ospeed;
655 else
656 baud = 9600;
657 }
658
659 tty_encode_baud_rate(tty, baud, baud);
660}
661
662static void cp210x_set_termios(struct tty_struct *tty,
663 struct usb_serial_port *port, struct ktermios *old_termios)
664{
665 struct device *dev = &port->dev;
666 unsigned int cflag, old_cflag;
667 unsigned int bits;
668 unsigned int modem_ctl[4];
669
670 cflag = tty->termios.c_cflag;
671 old_cflag = old_termios->c_cflag;
672
673 if (tty->termios.c_ospeed != old_termios->c_ospeed)
674 cp210x_change_speed(tty, port, old_termios);
675
676 /* If the number of data bits is to be updated */
677 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
678 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
679 bits &= ~BITS_DATA_MASK;
680 switch (cflag & CSIZE) {
681 case CS5:
682 bits |= BITS_DATA_5;
683 dev_dbg(dev, "%s - data bits = 5\n", __func__);
684 break;
685 case CS6:
686 bits |= BITS_DATA_6;
687 dev_dbg(dev, "%s - data bits = 6\n", __func__);
688 break;
689 case CS7:
690 bits |= BITS_DATA_7;
691 dev_dbg(dev, "%s - data bits = 7\n", __func__);
692 break;
693 case CS8:
694 bits |= BITS_DATA_8;
695 dev_dbg(dev, "%s - data bits = 8\n", __func__);
696 break;
697 /*case CS9:
698 bits |= BITS_DATA_9;
699 dev_dbg(dev, "%s - data bits = 9\n", __func__);
700 break;*/
701 default:
702 dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n");
703 bits |= BITS_DATA_8;
704 break;
705 }
706 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
707 dev_dbg(dev, "Number of data bits requested not supported by device\n");
708 }
709
710 if ((cflag & (PARENB|PARODD|CMSPAR)) !=
711 (old_cflag & (PARENB|PARODD|CMSPAR))) {
712 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
713 bits &= ~BITS_PARITY_MASK;
714 if (cflag & PARENB) {
715 if (cflag & CMSPAR) {
716 if (cflag & PARODD) {
717 bits |= BITS_PARITY_MARK;
718 dev_dbg(dev, "%s - parity = MARK\n", __func__);
719 } else {
720 bits |= BITS_PARITY_SPACE;
721 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
722 }
723 } else {
724 if (cflag & PARODD) {
725 bits |= BITS_PARITY_ODD;
726 dev_dbg(dev, "%s - parity = ODD\n", __func__);
727 } else {
728 bits |= BITS_PARITY_EVEN;
729 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
730 }
731 }
732 }
733 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
734 dev_dbg(dev, "Parity mode not supported by device\n");
735 }
736
737 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
738 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
739 bits &= ~BITS_STOP_MASK;
740 if (cflag & CSTOPB) {
741 bits |= BITS_STOP_2;
742 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
743 } else {
744 bits |= BITS_STOP_1;
745 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
746 }
747 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
748 dev_dbg(dev, "Number of stop bits requested not supported by device\n");
749 }
750
751 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
752 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
753 dev_dbg(dev, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
754 __func__, modem_ctl[0], modem_ctl[1],
755 modem_ctl[2], modem_ctl[3]);
756
757 if (cflag & CRTSCTS) {
758 modem_ctl[0] &= ~0x7B;
759 modem_ctl[0] |= 0x09;
760 modem_ctl[1] = 0x80;
761 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
762 } else {
763 modem_ctl[0] &= ~0x7B;
764 modem_ctl[0] |= 0x01;
765 modem_ctl[1] |= 0x40;
766 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
767 }
768
769 dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
770 __func__, modem_ctl[0], modem_ctl[1],
771 modem_ctl[2], modem_ctl[3]);
772 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
773 }
774
775}
776
777static int cp210x_tiocmset(struct tty_struct *tty,
778 unsigned int set, unsigned int clear)
779{
780 struct usb_serial_port *port = tty->driver_data;
781 return cp210x_tiocmset_port(port, set, clear);
782}
783
784static int cp210x_tiocmset_port(struct usb_serial_port *port,
785 unsigned int set, unsigned int clear)
786{
787 unsigned int control = 0;
788
789 if (set & TIOCM_RTS) {
790 control |= CONTROL_RTS;
791 control |= CONTROL_WRITE_RTS;
792 }
793 if (set & TIOCM_DTR) {
794 control |= CONTROL_DTR;
795 control |= CONTROL_WRITE_DTR;
796 }
797 if (clear & TIOCM_RTS) {
798 control &= ~CONTROL_RTS;
799 control |= CONTROL_WRITE_RTS;
800 }
801 if (clear & TIOCM_DTR) {
802 control &= ~CONTROL_DTR;
803 control |= CONTROL_WRITE_DTR;
804 }
805
806 dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control);
807
808 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
809}
810
811static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
812{
813 if (on)
814 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
815 else
816 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
817}
818
819static int cp210x_tiocmget(struct tty_struct *tty)
820{
821 struct usb_serial_port *port = tty->driver_data;
822 unsigned int control;
823 int result;
824
825 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
826
827 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
828 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
829 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
830 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
831 |((control & CONTROL_RING)? TIOCM_RI : 0)
832 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
833
834 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control);
835
836 return result;
837}
838
839static void cp210x_break_ctl(struct tty_struct *tty, int break_state)
840{
841 struct usb_serial_port *port = tty->driver_data;
842 unsigned int state;
843
844 if (break_state == 0)
845 state = BREAK_OFF;
846 else
847 state = BREAK_ON;
848 dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
849 state == BREAK_OFF ? "off" : "on");
850 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
851}
852
853static int cp210x_startup(struct usb_serial *serial)
854{
855 struct usb_host_interface *cur_altsetting;
856 struct cp210x_serial_private *spriv;
857
858 /* cp210x buffers behave strangely unless device is reset */
859 usb_reset_device(serial->dev);
860
861 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
862 if (!spriv)
863 return -ENOMEM;
864
865 cur_altsetting = serial->interface->cur_altsetting;
866 spriv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber;
867
868 usb_set_serial_data(serial, spriv);
869
870 return 0;
871}
872
873static void cp210x_release(struct usb_serial *serial)
874{
875 struct cp210x_serial_private *spriv;
876
877 spriv = usb_get_serial_data(serial);
878 kfree(spriv);
879}
880
881module_usb_serial_driver(serial_drivers, id_table);
882
883MODULE_DESCRIPTION(DRIVER_DESC);
884MODULE_LICENSE("GPL");