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 *, struct usb_serial_port *,
38 static void cp210x_cleanup(struct usb_serial_port *);
39 static void cp210x_close(struct usb_serial_port *);
40 static void cp210x_get_termios(struct tty_struct *,
41 struct usb_serial_port *port);
42 static void cp210x_get_termios_port(struct usb_serial_port *port,
43 unsigned int *cflagp, unsigned int *baudp);
44 static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
46 static int cp210x_tiocmget(struct tty_struct *, struct file *);
47 static int cp210x_tiocmset(struct tty_struct *, struct file *,
48 unsigned int, unsigned int);
49 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *,
50 unsigned int, unsigned int);
51 static void cp210x_break_ctl(struct tty_struct *, int);
52 static int cp210x_startup(struct usb_serial *);
53 static void cp210x_shutdown(struct usb_serial *);
57 static struct usb_device_id id_table [] = {
58 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
59 { USB_DEVICE(0x0489, 0xE000) }, /* 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(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
64 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
65 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
66 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
67 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
68 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
69 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
70 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
71 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
72 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
73 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
74 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
75 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
76 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
77 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
78 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
79 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
80 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
81 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
82 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
83 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
84 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
85 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
86 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
87 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
88 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
89 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
90 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
91 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
92 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
93 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */
94 { USB_DEVICE(0x10c4, 0x8293) }, /* Telegesys ETRX2USB */
95 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
96 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
97 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
98 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
99 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
100 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
101 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
102 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
103 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
104 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
105 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
106 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
107 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
108 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
109 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
110 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
111 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
112 { } /* Terminating Entry */
115 MODULE_DEVICE_TABLE(usb, id_table);
117 static struct usb_driver cp210x_driver = {
119 .probe = usb_serial_probe,
120 .disconnect = usb_serial_disconnect,
121 .id_table = id_table,
125 static struct usb_serial_driver cp210x_device = {
127 .owner = THIS_MODULE,
130 .usb_driver = &cp210x_driver,
131 .id_table = id_table,
134 .close = cp210x_close,
135 .break_ctl = cp210x_break_ctl,
136 .set_termios = cp210x_set_termios,
137 .tiocmget = cp210x_tiocmget,
138 .tiocmset = cp210x_tiocmset,
139 .attach = cp210x_startup,
140 .shutdown = cp210x_shutdown,
143 /* Config request types */
144 #define REQTYPE_HOST_TO_DEVICE 0x41
145 #define REQTYPE_DEVICE_TO_HOST 0xc1
147 /* Config request codes */
148 #define CP210X_IFC_ENABLE 0x00
149 #define CP210X_SET_BAUDDIV 0x01
150 #define CP210X_GET_BAUDDIV 0x02
151 #define CP210X_SET_LINE_CTL 0x03
152 #define CP210X_GET_LINE_CTL 0x04
153 #define CP210X_SET_BREAK 0x05
154 #define CP210X_IMM_CHAR 0x06
155 #define CP210X_SET_MHS 0x07
156 #define CP210X_GET_MDMSTS 0x08
157 #define CP210X_SET_XON 0x09
158 #define CP210X_SET_XOFF 0x0A
159 #define CP210X_SET_EVENTMASK 0x0B
160 #define CP210X_GET_EVENTMASK 0x0C
161 #define CP210X_SET_CHAR 0x0D
162 #define CP210X_GET_CHARS 0x0E
163 #define CP210X_GET_PROPS 0x0F
164 #define CP210X_GET_COMM_STATUS 0x10
165 #define CP210X_RESET 0x11
166 #define CP210X_PURGE 0x12
167 #define CP210X_SET_FLOW 0x13
168 #define CP210X_GET_FLOW 0x14
169 #define CP210X_EMBED_EVENTS 0x15
170 #define CP210X_GET_EVENTSTATE 0x16
171 #define CP210X_SET_CHARS 0x19
173 /* CP210X_IFC_ENABLE */
174 #define UART_ENABLE 0x0001
175 #define UART_DISABLE 0x0000
177 /* CP210X_(SET|GET)_BAUDDIV */
178 #define BAUD_RATE_GEN_FREQ 0x384000
180 /* CP210X_(SET|GET)_LINE_CTL */
181 #define BITS_DATA_MASK 0X0f00
182 #define BITS_DATA_5 0X0500
183 #define BITS_DATA_6 0X0600
184 #define BITS_DATA_7 0X0700
185 #define BITS_DATA_8 0X0800
186 #define BITS_DATA_9 0X0900
188 #define BITS_PARITY_MASK 0x00f0
189 #define BITS_PARITY_NONE 0x0000
190 #define BITS_PARITY_ODD 0x0010
191 #define BITS_PARITY_EVEN 0x0020
192 #define BITS_PARITY_MARK 0x0030
193 #define BITS_PARITY_SPACE 0x0040
195 #define BITS_STOP_MASK 0x000f
196 #define BITS_STOP_1 0x0000
197 #define BITS_STOP_1_5 0x0001
198 #define BITS_STOP_2 0x0002
200 /* CP210X_SET_BREAK */
201 #define BREAK_ON 0x0000
202 #define BREAK_OFF 0x0001
204 /* CP210X_(SET_MHS|GET_MDMSTS) */
205 #define CONTROL_DTR 0x0001
206 #define CONTROL_RTS 0x0002
207 #define CONTROL_CTS 0x0010
208 #define CONTROL_DSR 0x0020
209 #define CONTROL_RING 0x0040
210 #define CONTROL_DCD 0x0080
211 #define CONTROL_WRITE_DTR 0x0100
212 #define CONTROL_WRITE_RTS 0x0200
216 * Reads from the CP210x configuration registers
217 * 'size' is specified in bytes.
218 * 'data' is a pointer to a pre-allocated array of integers large
219 * enough to hold 'size' bytes (with 4 bytes to each integer)
221 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
222 unsigned int *data, int size)
224 struct usb_serial *serial = port->serial;
226 int result, i, length;
228 /* Number of integers required to contain the array */
229 length = (((size - 1) | 3) + 1)/4;
231 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
233 dev_err(&port->dev, "%s - out of memory.\n", __func__);
237 /* Issue the request, attempting to read 'size' bytes */
238 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
239 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
242 /* Convert data into an array of integers */
243 for (i = 0; i < length; i++)
244 data[i] = le32_to_cpu(buf[i]);
248 if (result != size) {
249 dbg("%s - Unable to send config request, "
250 "request=0x%x size=%d result=%d\n",
251 __func__, request, size, result);
260 * Writes to the CP210x configuration registers
261 * Values less than 16 bits wide are sent directly
262 * 'size' is specified in bytes.
264 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
265 unsigned int *data, int size)
267 struct usb_serial *serial = port->serial;
269 int result, i, length;
271 /* Number of integers required to contain the array */
272 length = (((size - 1) | 3) + 1)/4;
274 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
276 dev_err(&port->dev, "%s - out of memory.\n",
281 /* Array of integers into bytes */
282 for (i = 0; i < length; i++)
283 buf[i] = cpu_to_le32(data[i]);
286 result = usb_control_msg(serial->dev,
287 usb_sndctrlpipe(serial->dev, 0),
288 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
291 result = usb_control_msg(serial->dev,
292 usb_sndctrlpipe(serial->dev, 0),
293 request, REQTYPE_HOST_TO_DEVICE, data[0],
299 if ((size > 2 && result != size) || result < 0) {
300 dbg("%s - Unable to send request, "
301 "request=0x%x size=%d result=%d\n",
302 __func__, request, size, result);
306 /* Single data value */
307 result = usb_control_msg(serial->dev,
308 usb_sndctrlpipe(serial->dev, 0),
309 request, REQTYPE_HOST_TO_DEVICE, data[0],
315 * cp210x_set_config_single
316 * Convenience function for calling cp210x_set_config on single data values
317 * without requiring an integer pointer
319 static inline int cp210x_set_config_single(struct usb_serial_port *port,
320 u8 request, unsigned int data)
322 return cp210x_set_config(port, request, &data, 2);
326 * cp210x_quantise_baudrate
327 * Quantises the baud rate as per AN205 Table 1
329 static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
330 if (baud <= 56) baud = 0;
331 else if (baud <= 300) baud = 300;
332 else if (baud <= 600) baud = 600;
333 else if (baud <= 1200) baud = 1200;
334 else if (baud <= 1800) baud = 1800;
335 else if (baud <= 2400) baud = 2400;
336 else if (baud <= 4000) baud = 4000;
337 else if (baud <= 4803) baud = 4800;
338 else if (baud <= 7207) baud = 7200;
339 else if (baud <= 9612) baud = 9600;
340 else if (baud <= 14428) baud = 14400;
341 else if (baud <= 16062) baud = 16000;
342 else if (baud <= 19250) baud = 19200;
343 else if (baud <= 28912) baud = 28800;
344 else if (baud <= 38601) baud = 38400;
345 else if (baud <= 51558) baud = 51200;
346 else if (baud <= 56280) baud = 56000;
347 else if (baud <= 58053) baud = 57600;
348 else if (baud <= 64111) baud = 64000;
349 else if (baud <= 77608) baud = 76800;
350 else if (baud <= 117028) baud = 115200;
351 else if (baud <= 129347) baud = 128000;
352 else if (baud <= 156868) baud = 153600;
353 else if (baud <= 237832) baud = 230400;
354 else if (baud <= 254234) baud = 250000;
355 else if (baud <= 273066) baud = 256000;
356 else if (baud <= 491520) baud = 460800;
357 else if (baud <= 567138) baud = 500000;
358 else if (baud <= 670254) baud = 576000;
359 else if (baud <= 1053257) baud = 921600;
360 else if (baud <= 1474560) baud = 1228800;
361 else if (baud <= 2457600) baud = 1843200;
366 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port,
369 struct usb_serial *serial = port->serial;
372 dbg("%s - port %d", __func__, port->number);
374 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
375 dev_err(&port->dev, "%s - Unable to enable UART\n",
380 /* Start reading from the device */
381 usb_fill_bulk_urb(port->read_urb, serial->dev,
382 usb_rcvbulkpipe(serial->dev,
383 port->bulk_in_endpointAddress),
384 port->read_urb->transfer_buffer,
385 port->read_urb->transfer_buffer_length,
386 serial->type->read_bulk_callback,
388 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
390 dev_err(&port->dev, "%s - failed resubmitting read urb, "
391 "error %d\n", __func__, result);
395 /* Configure the termios structure */
396 cp210x_get_termios(tty, port);
398 /* Set the DTR and RTS pins low */
399 cp210x_tiocmset_port(tty ? (struct usb_serial_port *) tty->driver_data
401 NULL, TIOCM_DTR | TIOCM_RTS, 0);
406 static void cp210x_cleanup(struct usb_serial_port *port)
408 struct usb_serial *serial = port->serial;
410 dbg("%s - port %d", __func__, port->number);
413 /* shutdown any bulk reads that might be going on */
414 if (serial->num_bulk_out)
415 usb_kill_urb(port->write_urb);
416 if (serial->num_bulk_in)
417 usb_kill_urb(port->read_urb);
421 static void cp210x_close(struct usb_serial_port *port)
423 dbg("%s - port %d", __func__, port->number);
425 /* shutdown our urbs */
426 dbg("%s - shutting down urbs", __func__);
427 usb_kill_urb(port->write_urb);
428 usb_kill_urb(port->read_urb);
430 mutex_lock(&port->serial->disc_mutex);
431 if (!port->serial->disconnected)
432 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
433 mutex_unlock(&port->serial->disc_mutex);
438 * Reads the baud rate, data bits, parity, stop bits and flow control mode
439 * from the device, corrects any unsupported values, and configures the
440 * termios structure to reflect the state of the device
442 static void cp210x_get_termios(struct tty_struct *tty,
443 struct usb_serial_port *port)
448 cp210x_get_termios_port(tty->driver_data,
449 &tty->termios->c_cflag, &baud);
450 tty_encode_baud_rate(tty, baud, baud);
456 cp210x_get_termios_port(port, &cflag, &baud);
461 * cp210x_get_termios_port
462 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
464 static void cp210x_get_termios_port(struct usb_serial_port *port,
465 unsigned int *cflagp, unsigned int *baudp)
467 unsigned int cflag, modem_ctl[4];
471 dbg("%s - port %d", __func__, port->number);
473 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
474 /* Convert to baudrate */
476 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
478 dbg("%s - baud rate = %d", __func__, baud);
483 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
485 switch (bits & BITS_DATA_MASK) {
487 dbg("%s - data bits = 5", __func__);
491 dbg("%s - data bits = 6", __func__);
495 dbg("%s - data bits = 7", __func__);
499 dbg("%s - data bits = 8", __func__);
503 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
506 bits &= ~BITS_DATA_MASK;
508 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
511 dbg("%s - Unknown number of data bits, using 8", __func__);
513 bits &= ~BITS_DATA_MASK;
515 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
519 switch (bits & BITS_PARITY_MASK) {
520 case BITS_PARITY_NONE:
521 dbg("%s - parity = NONE", __func__);
524 case BITS_PARITY_ODD:
525 dbg("%s - parity = ODD", __func__);
526 cflag |= (PARENB|PARODD);
528 case BITS_PARITY_EVEN:
529 dbg("%s - parity = EVEN", __func__);
533 case BITS_PARITY_MARK:
534 dbg("%s - parity = MARK (not supported, disabling parity)",
537 bits &= ~BITS_PARITY_MASK;
538 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
540 case BITS_PARITY_SPACE:
541 dbg("%s - parity = SPACE (not supported, disabling parity)",
544 bits &= ~BITS_PARITY_MASK;
545 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
548 dbg("%s - Unknown parity mode, disabling parity", __func__);
550 bits &= ~BITS_PARITY_MASK;
551 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
556 switch (bits & BITS_STOP_MASK) {
558 dbg("%s - stop bits = 1", __func__);
561 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
563 bits &= ~BITS_STOP_MASK;
564 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
567 dbg("%s - stop bits = 2", __func__);
571 dbg("%s - Unknown number of stop bits, using 1 stop bit",
573 bits &= ~BITS_STOP_MASK;
574 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
578 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
579 if (modem_ctl[0] & 0x0008) {
580 dbg("%s - flow control = CRTSCTS", __func__);
583 dbg("%s - flow control = NONE", __func__);
590 static void cp210x_set_termios(struct tty_struct *tty,
591 struct usb_serial_port *port, struct ktermios *old_termios)
593 unsigned int cflag, old_cflag;
594 unsigned int baud = 0, bits;
595 unsigned int modem_ctl[4];
597 dbg("%s - port %d", __func__, port->number);
602 tty->termios->c_cflag &= ~CMSPAR;
603 cflag = tty->termios->c_cflag;
604 old_cflag = old_termios->c_cflag;
605 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
607 /* If the baud rate is to be updated*/
608 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
609 dbg("%s - Setting baud rate to %d baud", __func__,
611 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
612 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
613 dbg("Baud rate requested not supported by device\n");
614 baud = tty_termios_baud_rate(old_termios);
617 /* Report back the resulting baud rate */
618 tty_encode_baud_rate(tty, baud, baud);
620 /* If the number of data bits is to be updated */
621 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
622 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
623 bits &= ~BITS_DATA_MASK;
624 switch (cflag & CSIZE) {
627 dbg("%s - data bits = 5", __func__);
631 dbg("%s - data bits = 6", __func__);
635 dbg("%s - data bits = 7", __func__);
639 dbg("%s - data bits = 8", __func__);
643 dbg("%s - data bits = 9", __func__);
646 dbg("cp210x driver does not "
647 "support the number of bits requested,"
648 " using 8 bit mode\n");
652 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
653 dbg("Number of data bits requested "
654 "not supported by device\n");
657 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
658 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
659 bits &= ~BITS_PARITY_MASK;
660 if (cflag & PARENB) {
661 if (cflag & PARODD) {
662 bits |= BITS_PARITY_ODD;
663 dbg("%s - parity = ODD", __func__);
665 bits |= BITS_PARITY_EVEN;
666 dbg("%s - parity = EVEN", __func__);
669 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
670 dbg("Parity mode not supported "
674 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
675 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
676 bits &= ~BITS_STOP_MASK;
677 if (cflag & CSTOPB) {
679 dbg("%s - stop bits = 2", __func__);
682 dbg("%s - stop bits = 1", __func__);
684 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
685 dbg("Number of stop bits requested "
686 "not supported by device\n");
689 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
690 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
691 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
692 __func__, modem_ctl[0], modem_ctl[1],
693 modem_ctl[2], modem_ctl[3]);
695 if (cflag & CRTSCTS) {
696 modem_ctl[0] &= ~0x7B;
697 modem_ctl[0] |= 0x09;
699 dbg("%s - flow control = CRTSCTS", __func__);
701 modem_ctl[0] &= ~0x7B;
702 modem_ctl[0] |= 0x01;
703 modem_ctl[1] |= 0x40;
704 dbg("%s - flow control = NONE", __func__);
707 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
708 __func__, modem_ctl[0], modem_ctl[1],
709 modem_ctl[2], modem_ctl[3]);
710 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
715 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file,
716 unsigned int set, unsigned int clear)
718 struct usb_serial_port *port = tty->driver_data;
719 return cp210x_tiocmset_port(port, file, set, clear);
722 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file,
723 unsigned int set, unsigned int clear)
725 unsigned int control = 0;
727 dbg("%s - port %d", __func__, port->number);
729 if (set & TIOCM_RTS) {
730 control |= CONTROL_RTS;
731 control |= CONTROL_WRITE_RTS;
733 if (set & TIOCM_DTR) {
734 control |= CONTROL_DTR;
735 control |= CONTROL_WRITE_DTR;
737 if (clear & TIOCM_RTS) {
738 control &= ~CONTROL_RTS;
739 control |= CONTROL_WRITE_RTS;
741 if (clear & TIOCM_DTR) {
742 control &= ~CONTROL_DTR;
743 control |= CONTROL_WRITE_DTR;
746 dbg("%s - control = 0x%.4x", __func__, control);
748 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
751 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file)
753 struct usb_serial_port *port = tty->driver_data;
754 unsigned int control;
757 dbg("%s - port %d", __func__, port->number);
759 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
761 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
762 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
763 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
764 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
765 |((control & CONTROL_RING)? TIOCM_RI : 0)
766 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
768 dbg("%s - control = 0x%.2x", __func__, control);
773 static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
775 struct usb_serial_port *port = tty->driver_data;
778 dbg("%s - port %d", __func__, port->number);
779 if (break_state == 0)
783 dbg("%s - turning break %s", __func__,
784 state == BREAK_OFF ? "off" : "on");
785 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
788 static int cp210x_startup(struct usb_serial *serial)
790 /* cp210x buffers behave strangely unless device is reset */
791 usb_reset_device(serial->dev);
795 static void cp210x_shutdown(struct usb_serial *serial)
801 /* Stop reads and writes on all ports */
802 for (i = 0; i < serial->num_ports; ++i)
803 cp210x_cleanup(serial->port[i]);
806 static int __init cp210x_init(void)
810 retval = usb_serial_register(&cp210x_device);
812 return retval; /* Failed to register */
814 retval = usb_register(&cp210x_driver);
816 /* Failed to register */
817 usb_serial_deregister(&cp210x_device);
822 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
827 static void __exit cp210x_exit(void)
829 usb_deregister(&cp210x_driver);
830 usb_serial_deregister(&cp210x_device);
833 module_init(cp210x_init);
834 module_exit(cp210x_exit);
836 MODULE_DESCRIPTION(DRIVER_DESC);
837 MODULE_VERSION(DRIVER_VERSION);
838 MODULE_LICENSE("GPL");
840 module_param(debug, bool, S_IRUGO | S_IWUSR);
841 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");