2 * Silicon Laboratories CP210x USB to RS232 serial adaptor driver
4 * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
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.
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
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>
30 #define DRIVER_VERSION "v0.09"
31 #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
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 *,
44 static int cp210x_tiocmget(struct tty_struct *, struct file *);
45 static int cp210x_tiocmset(struct tty_struct *, struct file *,
46 unsigned int, unsigned int);
47 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *,
48 unsigned int, unsigned int);
49 static void cp210x_break_ctl(struct tty_struct *, int);
50 static int cp210x_startup(struct usb_serial *);
51 static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
52 static int cp210x_carrier_raised(struct usb_serial_port *p);
56 static const struct usb_device_id id_table[] = {
57 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
58 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
59 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
60 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
61 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
62 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
63 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
64 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
65 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
66 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
67 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
68 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
69 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
70 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
71 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
72 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
73 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
74 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
75 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
76 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
77 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
78 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
79 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
80 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
81 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
82 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
83 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
84 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
85 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
86 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
87 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
88 { USB_DEVICE(0x10C4, 0x8149) }, /* West Mountain Radio Computerized Battery Analyzer */
89 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
90 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
91 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
92 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
93 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
94 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
95 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
96 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
97 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
98 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
99 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
100 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
101 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
102 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
103 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
104 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */
105 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesys ETRX2USB */
106 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
107 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
108 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
109 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
110 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
111 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
112 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
113 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
114 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
115 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
116 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
117 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
118 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
119 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
120 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
121 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
122 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
123 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
124 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
125 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
126 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
127 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
128 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
129 { 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 { } /* Terminating Entry */
136 MODULE_DEVICE_TABLE(usb, id_table);
138 static struct usb_driver cp210x_driver = {
140 .probe = usb_serial_probe,
141 .disconnect = usb_serial_disconnect,
142 .id_table = id_table,
146 static struct usb_serial_driver cp210x_device = {
148 .owner = THIS_MODULE,
151 .usb_driver = &cp210x_driver,
152 .id_table = id_table,
155 .bulk_out_size = 256,
157 .close = cp210x_close,
158 .break_ctl = cp210x_break_ctl,
159 .set_termios = cp210x_set_termios,
160 .tiocmget = cp210x_tiocmget,
161 .tiocmset = cp210x_tiocmset,
162 .attach = cp210x_startup,
163 .dtr_rts = cp210x_dtr_rts,
164 .carrier_raised = cp210x_carrier_raised
167 /* Config request types */
168 #define REQTYPE_HOST_TO_DEVICE 0x41
169 #define REQTYPE_DEVICE_TO_HOST 0xc1
171 /* Config request codes */
172 #define CP210X_IFC_ENABLE 0x00
173 #define CP210X_SET_BAUDDIV 0x01
174 #define CP210X_GET_BAUDDIV 0x02
175 #define CP210X_SET_LINE_CTL 0x03
176 #define CP210X_GET_LINE_CTL 0x04
177 #define CP210X_SET_BREAK 0x05
178 #define CP210X_IMM_CHAR 0x06
179 #define CP210X_SET_MHS 0x07
180 #define CP210X_GET_MDMSTS 0x08
181 #define CP210X_SET_XON 0x09
182 #define CP210X_SET_XOFF 0x0A
183 #define CP210X_SET_EVENTMASK 0x0B
184 #define CP210X_GET_EVENTMASK 0x0C
185 #define CP210X_SET_CHAR 0x0D
186 #define CP210X_GET_CHARS 0x0E
187 #define CP210X_GET_PROPS 0x0F
188 #define CP210X_GET_COMM_STATUS 0x10
189 #define CP210X_RESET 0x11
190 #define CP210X_PURGE 0x12
191 #define CP210X_SET_FLOW 0x13
192 #define CP210X_GET_FLOW 0x14
193 #define CP210X_EMBED_EVENTS 0x15
194 #define CP210X_GET_EVENTSTATE 0x16
195 #define CP210X_SET_CHARS 0x19
197 /* CP210X_IFC_ENABLE */
198 #define UART_ENABLE 0x0001
199 #define UART_DISABLE 0x0000
201 /* CP210X_(SET|GET)_BAUDDIV */
202 #define BAUD_RATE_GEN_FREQ 0x384000
204 /* CP210X_(SET|GET)_LINE_CTL */
205 #define BITS_DATA_MASK 0X0f00
206 #define BITS_DATA_5 0X0500
207 #define BITS_DATA_6 0X0600
208 #define BITS_DATA_7 0X0700
209 #define BITS_DATA_8 0X0800
210 #define BITS_DATA_9 0X0900
212 #define BITS_PARITY_MASK 0x00f0
213 #define BITS_PARITY_NONE 0x0000
214 #define BITS_PARITY_ODD 0x0010
215 #define BITS_PARITY_EVEN 0x0020
216 #define BITS_PARITY_MARK 0x0030
217 #define BITS_PARITY_SPACE 0x0040
219 #define BITS_STOP_MASK 0x000f
220 #define BITS_STOP_1 0x0000
221 #define BITS_STOP_1_5 0x0001
222 #define BITS_STOP_2 0x0002
224 /* CP210X_SET_BREAK */
225 #define BREAK_ON 0x0000
226 #define BREAK_OFF 0x0001
228 /* CP210X_(SET_MHS|GET_MDMSTS) */
229 #define CONTROL_DTR 0x0001
230 #define CONTROL_RTS 0x0002
231 #define CONTROL_CTS 0x0010
232 #define CONTROL_DSR 0x0020
233 #define CONTROL_RING 0x0040
234 #define CONTROL_DCD 0x0080
235 #define CONTROL_WRITE_DTR 0x0100
236 #define CONTROL_WRITE_RTS 0x0200
240 * Reads from the CP210x configuration registers
241 * 'size' is specified in bytes.
242 * 'data' is a pointer to a pre-allocated array of integers large
243 * enough to hold 'size' bytes (with 4 bytes to each integer)
245 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
246 unsigned int *data, int size)
248 struct usb_serial *serial = port->serial;
250 int result, i, length;
252 /* Number of integers required to contain the array */
253 length = (((size - 1) | 3) + 1)/4;
255 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
257 dev_err(&port->dev, "%s - out of memory.\n", __func__);
261 /* Issue the request, attempting to read 'size' bytes */
262 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
263 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
266 /* Convert data into an array of integers */
267 for (i = 0; i < length; i++)
268 data[i] = le32_to_cpu(buf[i]);
272 if (result != size) {
273 dbg("%s - Unable to send config request, "
274 "request=0x%x size=%d result=%d\n",
275 __func__, request, size, result);
284 * Writes to the CP210x configuration registers
285 * Values less than 16 bits wide are sent directly
286 * 'size' is specified in bytes.
288 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
289 unsigned int *data, int size)
291 struct usb_serial *serial = port->serial;
293 int result, i, length;
295 /* Number of integers required to contain the array */
296 length = (((size - 1) | 3) + 1)/4;
298 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
300 dev_err(&port->dev, "%s - out of memory.\n",
305 /* Array of integers into bytes */
306 for (i = 0; i < length; i++)
307 buf[i] = cpu_to_le32(data[i]);
310 result = usb_control_msg(serial->dev,
311 usb_sndctrlpipe(serial->dev, 0),
312 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
315 result = usb_control_msg(serial->dev,
316 usb_sndctrlpipe(serial->dev, 0),
317 request, REQTYPE_HOST_TO_DEVICE, data[0],
323 if ((size > 2 && result != size) || result < 0) {
324 dbg("%s - Unable to send request, "
325 "request=0x%x size=%d result=%d\n",
326 __func__, request, size, result);
334 * cp210x_set_config_single
335 * Convenience function for calling cp210x_set_config on single data values
336 * without requiring an integer pointer
338 static inline int cp210x_set_config_single(struct usb_serial_port *port,
339 u8 request, unsigned int data)
341 return cp210x_set_config(port, request, &data, 2);
345 * cp210x_quantise_baudrate
346 * Quantises the baud rate as per AN205 Table 1
348 static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
349 if (baud <= 56) baud = 0;
350 else if (baud <= 300) baud = 300;
351 else if (baud <= 600) baud = 600;
352 else if (baud <= 1200) baud = 1200;
353 else if (baud <= 1800) baud = 1800;
354 else if (baud <= 2400) baud = 2400;
355 else if (baud <= 4000) baud = 4000;
356 else if (baud <= 4803) baud = 4800;
357 else if (baud <= 7207) baud = 7200;
358 else if (baud <= 9612) baud = 9600;
359 else if (baud <= 14428) baud = 14400;
360 else if (baud <= 16062) baud = 16000;
361 else if (baud <= 19250) baud = 19200;
362 else if (baud <= 28912) baud = 28800;
363 else if (baud <= 38601) baud = 38400;
364 else if (baud <= 51558) baud = 51200;
365 else if (baud <= 56280) baud = 56000;
366 else if (baud <= 58053) baud = 57600;
367 else if (baud <= 64111) baud = 64000;
368 else if (baud <= 77608) baud = 76800;
369 else if (baud <= 117028) baud = 115200;
370 else if (baud <= 129347) baud = 128000;
371 else if (baud <= 156868) baud = 153600;
372 else if (baud <= 237832) baud = 230400;
373 else if (baud <= 254234) baud = 250000;
374 else if (baud <= 273066) baud = 256000;
375 else if (baud <= 491520) baud = 460800;
376 else if (baud <= 567138) baud = 500000;
377 else if (baud <= 670254) baud = 576000;
378 else if (baud <= 1053257) baud = 921600;
379 else if (baud <= 1474560) baud = 1228800;
380 else if (baud <= 2457600) baud = 1843200;
385 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
389 dbg("%s - port %d", __func__, port->number);
391 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
392 dev_err(&port->dev, "%s - Unable to enable UART\n",
397 result = usb_serial_generic_open(tty, port);
401 /* Configure the termios structure */
402 cp210x_get_termios(tty, port);
406 static void cp210x_close(struct usb_serial_port *port)
408 dbg("%s - port %d", __func__, port->number);
410 usb_serial_generic_close(port);
412 mutex_lock(&port->serial->disc_mutex);
413 if (!port->serial->disconnected)
414 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
415 mutex_unlock(&port->serial->disc_mutex);
420 * Reads the baud rate, data bits, parity, stop bits and flow control mode
421 * from the device, corrects any unsupported values, and configures the
422 * termios structure to reflect the state of the device
424 static void cp210x_get_termios(struct tty_struct *tty,
425 struct usb_serial_port *port)
430 cp210x_get_termios_port(tty->driver_data,
431 &tty->termios->c_cflag, &baud);
432 tty_encode_baud_rate(tty, baud, baud);
438 cp210x_get_termios_port(port, &cflag, &baud);
443 * cp210x_get_termios_port
444 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
446 static void cp210x_get_termios_port(struct usb_serial_port *port,
447 unsigned int *cflagp, unsigned int *baudp)
449 unsigned int cflag, modem_ctl[4];
453 dbg("%s - port %d", __func__, port->number);
455 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
456 /* Convert to baudrate */
458 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
460 dbg("%s - baud rate = %d", __func__, baud);
465 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
467 switch (bits & BITS_DATA_MASK) {
469 dbg("%s - data bits = 5", __func__);
473 dbg("%s - data bits = 6", __func__);
477 dbg("%s - data bits = 7", __func__);
481 dbg("%s - data bits = 8", __func__);
485 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
488 bits &= ~BITS_DATA_MASK;
490 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
493 dbg("%s - Unknown number of data bits, using 8", __func__);
495 bits &= ~BITS_DATA_MASK;
497 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
501 switch (bits & BITS_PARITY_MASK) {
502 case BITS_PARITY_NONE:
503 dbg("%s - parity = NONE", __func__);
506 case BITS_PARITY_ODD:
507 dbg("%s - parity = ODD", __func__);
508 cflag |= (PARENB|PARODD);
510 case BITS_PARITY_EVEN:
511 dbg("%s - parity = EVEN", __func__);
515 case BITS_PARITY_MARK:
516 dbg("%s - parity = MARK (not supported, disabling parity)",
519 bits &= ~BITS_PARITY_MASK;
520 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
522 case BITS_PARITY_SPACE:
523 dbg("%s - parity = SPACE (not supported, disabling parity)",
526 bits &= ~BITS_PARITY_MASK;
527 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
530 dbg("%s - Unknown parity mode, disabling parity", __func__);
532 bits &= ~BITS_PARITY_MASK;
533 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
538 switch (bits & BITS_STOP_MASK) {
540 dbg("%s - stop bits = 1", __func__);
543 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
545 bits &= ~BITS_STOP_MASK;
546 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
549 dbg("%s - stop bits = 2", __func__);
553 dbg("%s - Unknown number of stop bits, using 1 stop bit",
555 bits &= ~BITS_STOP_MASK;
556 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
560 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
561 if (modem_ctl[0] & 0x0008) {
562 dbg("%s - flow control = CRTSCTS", __func__);
565 dbg("%s - flow control = NONE", __func__);
572 static void cp210x_set_termios(struct tty_struct *tty,
573 struct usb_serial_port *port, struct ktermios *old_termios)
575 unsigned int cflag, old_cflag;
576 unsigned int baud = 0, bits;
577 unsigned int modem_ctl[4];
579 dbg("%s - port %d", __func__, port->number);
584 tty->termios->c_cflag &= ~CMSPAR;
585 cflag = tty->termios->c_cflag;
586 old_cflag = old_termios->c_cflag;
587 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
589 /* If the baud rate is to be updated*/
590 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
591 dbg("%s - Setting baud rate to %d baud", __func__,
593 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
594 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
595 dbg("Baud rate requested not supported by device");
596 baud = tty_termios_baud_rate(old_termios);
599 /* Report back the resulting baud rate */
600 tty_encode_baud_rate(tty, baud, baud);
602 /* If the number of data bits is to be updated */
603 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
604 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
605 bits &= ~BITS_DATA_MASK;
606 switch (cflag & CSIZE) {
609 dbg("%s - data bits = 5", __func__);
613 dbg("%s - data bits = 6", __func__);
617 dbg("%s - data bits = 7", __func__);
621 dbg("%s - data bits = 8", __func__);
625 dbg("%s - data bits = 9", __func__);
628 dbg("cp210x driver does not "
629 "support the number of bits requested,"
630 " using 8 bit mode\n");
634 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
635 dbg("Number of data bits requested "
636 "not supported by device\n");
639 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
640 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
641 bits &= ~BITS_PARITY_MASK;
642 if (cflag & PARENB) {
643 if (cflag & PARODD) {
644 bits |= BITS_PARITY_ODD;
645 dbg("%s - parity = ODD", __func__);
647 bits |= BITS_PARITY_EVEN;
648 dbg("%s - parity = EVEN", __func__);
651 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
652 dbg("Parity mode not supported "
656 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
657 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
658 bits &= ~BITS_STOP_MASK;
659 if (cflag & CSTOPB) {
661 dbg("%s - stop bits = 2", __func__);
664 dbg("%s - stop bits = 1", __func__);
666 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
667 dbg("Number of stop bits requested "
668 "not supported by device\n");
671 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
672 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
673 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
674 __func__, modem_ctl[0], modem_ctl[1],
675 modem_ctl[2], modem_ctl[3]);
677 if (cflag & CRTSCTS) {
678 modem_ctl[0] &= ~0x7B;
679 modem_ctl[0] |= 0x09;
681 dbg("%s - flow control = CRTSCTS", __func__);
683 modem_ctl[0] &= ~0x7B;
684 modem_ctl[0] |= 0x01;
685 modem_ctl[1] |= 0x40;
686 dbg("%s - flow control = NONE", __func__);
689 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
690 __func__, modem_ctl[0], modem_ctl[1],
691 modem_ctl[2], modem_ctl[3]);
692 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
697 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file,
698 unsigned int set, unsigned int clear)
700 struct usb_serial_port *port = tty->driver_data;
701 return cp210x_tiocmset_port(port, file, set, clear);
704 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file,
705 unsigned int set, unsigned int clear)
707 unsigned int control = 0;
709 dbg("%s - port %d", __func__, port->number);
711 if (set & TIOCM_RTS) {
712 control |= CONTROL_RTS;
713 control |= CONTROL_WRITE_RTS;
715 if (set & TIOCM_DTR) {
716 control |= CONTROL_DTR;
717 control |= CONTROL_WRITE_DTR;
719 if (clear & TIOCM_RTS) {
720 control &= ~CONTROL_RTS;
721 control |= CONTROL_WRITE_RTS;
723 if (clear & TIOCM_DTR) {
724 control &= ~CONTROL_DTR;
725 control |= CONTROL_WRITE_DTR;
728 dbg("%s - control = 0x%.4x", __func__, control);
730 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
733 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
736 cp210x_tiocmset_port(p, NULL, TIOCM_DTR|TIOCM_RTS, 0);
738 cp210x_tiocmset_port(p, NULL, 0, TIOCM_DTR|TIOCM_RTS);
741 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file)
743 struct usb_serial_port *port = tty->driver_data;
744 unsigned int control;
747 dbg("%s - port %d", __func__, port->number);
749 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
751 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
752 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
753 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
754 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
755 |((control & CONTROL_RING)? TIOCM_RI : 0)
756 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
758 dbg("%s - control = 0x%.2x", __func__, control);
763 static int cp210x_carrier_raised(struct usb_serial_port *p)
765 unsigned int control;
766 cp210x_get_config(p, CP210X_GET_MDMSTS, &control, 1);
767 if (control & CONTROL_DCD)
772 static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
774 struct usb_serial_port *port = tty->driver_data;
777 dbg("%s - port %d", __func__, port->number);
778 if (break_state == 0)
782 dbg("%s - turning break %s", __func__,
783 state == BREAK_OFF ? "off" : "on");
784 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
787 static int cp210x_startup(struct usb_serial *serial)
789 /* cp210x buffers behave strangely unless device is reset */
790 usb_reset_device(serial->dev);
794 static int __init cp210x_init(void)
798 retval = usb_serial_register(&cp210x_device);
800 return retval; /* Failed to register */
802 retval = usb_register(&cp210x_driver);
804 /* Failed to register */
805 usb_serial_deregister(&cp210x_device);
810 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
815 static void __exit cp210x_exit(void)
817 usb_deregister(&cp210x_driver);
818 usb_serial_deregister(&cp210x_device);
821 module_init(cp210x_init);
822 module_exit(cp210x_exit);
824 MODULE_DESCRIPTION(DRIVER_DESC);
825 MODULE_VERSION(DRIVER_VERSION);
826 MODULE_LICENSE("GPL");
828 module_param(debug, bool, S_IRUGO | S_IWUSR);
829 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");