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_cleanup(struct usb_serial_port
*);
38 static void cp210x_close(struct usb_serial_port
*);
39 static void cp210x_get_termios(struct tty_struct
*,
40 struct usb_serial_port
*port
);
41 static void cp210x_get_termios_port(struct usb_serial_port
*port
,
42 unsigned int *cflagp
, unsigned int *baudp
);
43 static void cp210x_set_termios(struct tty_struct
*, struct usb_serial_port
*,
45 static int cp210x_tiocmget(struct tty_struct
*, struct file
*);
46 static int cp210x_tiocmset(struct tty_struct
*, struct file
*,
47 unsigned int, unsigned int);
48 static int cp210x_tiocmset_port(struct usb_serial_port
*port
, struct file
*,
49 unsigned int, unsigned int);
50 static void cp210x_break_ctl(struct tty_struct
*, int);
51 static int cp210x_startup(struct usb_serial
*);
52 static void cp210x_disconnect(struct usb_serial
*);
53 static void cp210x_dtr_rts(struct usb_serial_port
*p
, int on
);
54 static int cp210x_carrier_raised(struct usb_serial_port
*p
);
58 static struct usb_device_id id_table
[] = {
59 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
60 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
61 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
62 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
63 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
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, 0x8053) }, /* Enfora EDG1228 */
76 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
77 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
78 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
79 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
80 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
81 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
82 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
83 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
84 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
85 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
86 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
87 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
88 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
89 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
90 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
91 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
92 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
93 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
94 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
95 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
96 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
97 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */
98 { USB_DEVICE(0x10c4, 0x8293) }, /* Telegesys ETRX2USB */
99 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
100 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
101 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
102 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
103 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
104 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
105 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
106 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
107 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
108 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
109 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
110 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
111 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
112 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
113 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
114 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
115 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
116 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
117 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
118 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
119 { } /* Terminating Entry */
122 MODULE_DEVICE_TABLE(usb
, id_table
);
124 static struct usb_driver cp210x_driver
= {
126 .probe
= usb_serial_probe
,
127 .disconnect
= usb_serial_disconnect
,
128 .id_table
= id_table
,
132 static struct usb_serial_driver cp210x_device
= {
134 .owner
= THIS_MODULE
,
137 .usb_driver
= &cp210x_driver
,
138 .id_table
= id_table
,
141 .close
= cp210x_close
,
142 .break_ctl
= cp210x_break_ctl
,
143 .set_termios
= cp210x_set_termios
,
144 .tiocmget
= cp210x_tiocmget
,
145 .tiocmset
= cp210x_tiocmset
,
146 .attach
= cp210x_startup
,
147 .disconnect
= cp210x_disconnect
,
148 .dtr_rts
= cp210x_dtr_rts
,
149 .carrier_raised
= cp210x_carrier_raised
152 /* Config request types */
153 #define REQTYPE_HOST_TO_DEVICE 0x41
154 #define REQTYPE_DEVICE_TO_HOST 0xc1
156 /* Config request codes */
157 #define CP210X_IFC_ENABLE 0x00
158 #define CP210X_SET_BAUDDIV 0x01
159 #define CP210X_GET_BAUDDIV 0x02
160 #define CP210X_SET_LINE_CTL 0x03
161 #define CP210X_GET_LINE_CTL 0x04
162 #define CP210X_SET_BREAK 0x05
163 #define CP210X_IMM_CHAR 0x06
164 #define CP210X_SET_MHS 0x07
165 #define CP210X_GET_MDMSTS 0x08
166 #define CP210X_SET_XON 0x09
167 #define CP210X_SET_XOFF 0x0A
168 #define CP210X_SET_EVENTMASK 0x0B
169 #define CP210X_GET_EVENTMASK 0x0C
170 #define CP210X_SET_CHAR 0x0D
171 #define CP210X_GET_CHARS 0x0E
172 #define CP210X_GET_PROPS 0x0F
173 #define CP210X_GET_COMM_STATUS 0x10
174 #define CP210X_RESET 0x11
175 #define CP210X_PURGE 0x12
176 #define CP210X_SET_FLOW 0x13
177 #define CP210X_GET_FLOW 0x14
178 #define CP210X_EMBED_EVENTS 0x15
179 #define CP210X_GET_EVENTSTATE 0x16
180 #define CP210X_SET_CHARS 0x19
182 /* CP210X_IFC_ENABLE */
183 #define UART_ENABLE 0x0001
184 #define UART_DISABLE 0x0000
186 /* CP210X_(SET|GET)_BAUDDIV */
187 #define BAUD_RATE_GEN_FREQ 0x384000
189 /* CP210X_(SET|GET)_LINE_CTL */
190 #define BITS_DATA_MASK 0X0f00
191 #define BITS_DATA_5 0X0500
192 #define BITS_DATA_6 0X0600
193 #define BITS_DATA_7 0X0700
194 #define BITS_DATA_8 0X0800
195 #define BITS_DATA_9 0X0900
197 #define BITS_PARITY_MASK 0x00f0
198 #define BITS_PARITY_NONE 0x0000
199 #define BITS_PARITY_ODD 0x0010
200 #define BITS_PARITY_EVEN 0x0020
201 #define BITS_PARITY_MARK 0x0030
202 #define BITS_PARITY_SPACE 0x0040
204 #define BITS_STOP_MASK 0x000f
205 #define BITS_STOP_1 0x0000
206 #define BITS_STOP_1_5 0x0001
207 #define BITS_STOP_2 0x0002
209 /* CP210X_SET_BREAK */
210 #define BREAK_ON 0x0000
211 #define BREAK_OFF 0x0001
213 /* CP210X_(SET_MHS|GET_MDMSTS) */
214 #define CONTROL_DTR 0x0001
215 #define CONTROL_RTS 0x0002
216 #define CONTROL_CTS 0x0010
217 #define CONTROL_DSR 0x0020
218 #define CONTROL_RING 0x0040
219 #define CONTROL_DCD 0x0080
220 #define CONTROL_WRITE_DTR 0x0100
221 #define CONTROL_WRITE_RTS 0x0200
225 * Reads from the CP210x configuration registers
226 * 'size' is specified in bytes.
227 * 'data' is a pointer to a pre-allocated array of integers large
228 * enough to hold 'size' bytes (with 4 bytes to each integer)
230 static int cp210x_get_config(struct usb_serial_port
*port
, u8 request
,
231 unsigned int *data
, int size
)
233 struct usb_serial
*serial
= port
->serial
;
235 int result
, i
, length
;
237 /* Number of integers required to contain the array */
238 length
= (((size
- 1) | 3) + 1)/4;
240 buf
= kcalloc(length
, sizeof(__le32
), GFP_KERNEL
);
242 dev_err(&port
->dev
, "%s - out of memory.\n", __func__
);
246 /* Issue the request, attempting to read 'size' bytes */
247 result
= usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
248 request
, REQTYPE_DEVICE_TO_HOST
, 0x0000,
251 /* Convert data into an array of integers */
252 for (i
= 0; i
< length
; i
++)
253 data
[i
] = le32_to_cpu(buf
[i
]);
257 if (result
!= size
) {
258 dbg("%s - Unable to send config request, "
259 "request=0x%x size=%d result=%d\n",
260 __func__
, request
, size
, result
);
269 * Writes to the CP210x configuration registers
270 * Values less than 16 bits wide are sent directly
271 * 'size' is specified in bytes.
273 static int cp210x_set_config(struct usb_serial_port
*port
, u8 request
,
274 unsigned int *data
, int size
)
276 struct usb_serial
*serial
= port
->serial
;
278 int result
, i
, length
;
280 /* Number of integers required to contain the array */
281 length
= (((size
- 1) | 3) + 1)/4;
283 buf
= kmalloc(length
* sizeof(__le32
), GFP_KERNEL
);
285 dev_err(&port
->dev
, "%s - out of memory.\n",
290 /* Array of integers into bytes */
291 for (i
= 0; i
< length
; i
++)
292 buf
[i
] = cpu_to_le32(data
[i
]);
295 result
= usb_control_msg(serial
->dev
,
296 usb_sndctrlpipe(serial
->dev
, 0),
297 request
, REQTYPE_HOST_TO_DEVICE
, 0x0000,
300 result
= usb_control_msg(serial
->dev
,
301 usb_sndctrlpipe(serial
->dev
, 0),
302 request
, REQTYPE_HOST_TO_DEVICE
, data
[0],
308 if ((size
> 2 && result
!= size
) || result
< 0) {
309 dbg("%s - Unable to send request, "
310 "request=0x%x size=%d result=%d\n",
311 __func__
, request
, size
, result
);
315 /* Single data value */
316 result
= usb_control_msg(serial
->dev
,
317 usb_sndctrlpipe(serial
->dev
, 0),
318 request
, REQTYPE_HOST_TO_DEVICE
, data
[0],
324 * cp210x_set_config_single
325 * Convenience function for calling cp210x_set_config on single data values
326 * without requiring an integer pointer
328 static inline int cp210x_set_config_single(struct usb_serial_port
*port
,
329 u8 request
, unsigned int data
)
331 return cp210x_set_config(port
, request
, &data
, 2);
335 * cp210x_quantise_baudrate
336 * Quantises the baud rate as per AN205 Table 1
338 static unsigned int cp210x_quantise_baudrate(unsigned int baud
) {
339 if (baud
<= 56) baud
= 0;
340 else if (baud
<= 300) baud
= 300;
341 else if (baud
<= 600) baud
= 600;
342 else if (baud
<= 1200) baud
= 1200;
343 else if (baud
<= 1800) baud
= 1800;
344 else if (baud
<= 2400) baud
= 2400;
345 else if (baud
<= 4000) baud
= 4000;
346 else if (baud
<= 4803) baud
= 4800;
347 else if (baud
<= 7207) baud
= 7200;
348 else if (baud
<= 9612) baud
= 9600;
349 else if (baud
<= 14428) baud
= 14400;
350 else if (baud
<= 16062) baud
= 16000;
351 else if (baud
<= 19250) baud
= 19200;
352 else if (baud
<= 28912) baud
= 28800;
353 else if (baud
<= 38601) baud
= 38400;
354 else if (baud
<= 51558) baud
= 51200;
355 else if (baud
<= 56280) baud
= 56000;
356 else if (baud
<= 58053) baud
= 57600;
357 else if (baud
<= 64111) baud
= 64000;
358 else if (baud
<= 77608) baud
= 76800;
359 else if (baud
<= 117028) baud
= 115200;
360 else if (baud
<= 129347) baud
= 128000;
361 else if (baud
<= 156868) baud
= 153600;
362 else if (baud
<= 237832) baud
= 230400;
363 else if (baud
<= 254234) baud
= 250000;
364 else if (baud
<= 273066) baud
= 256000;
365 else if (baud
<= 491520) baud
= 460800;
366 else if (baud
<= 567138) baud
= 500000;
367 else if (baud
<= 670254) baud
= 576000;
368 else if (baud
<= 1053257) baud
= 921600;
369 else if (baud
<= 1474560) baud
= 1228800;
370 else if (baud
<= 2457600) baud
= 1843200;
375 static int cp210x_open(struct tty_struct
*tty
, struct usb_serial_port
*port
)
377 struct usb_serial
*serial
= port
->serial
;
380 dbg("%s - port %d", __func__
, port
->number
);
382 if (cp210x_set_config_single(port
, CP210X_IFC_ENABLE
, UART_ENABLE
)) {
383 dev_err(&port
->dev
, "%s - Unable to enable UART\n",
388 /* Start reading from the device */
389 usb_fill_bulk_urb(port
->read_urb
, serial
->dev
,
390 usb_rcvbulkpipe(serial
->dev
,
391 port
->bulk_in_endpointAddress
),
392 port
->read_urb
->transfer_buffer
,
393 port
->read_urb
->transfer_buffer_length
,
394 serial
->type
->read_bulk_callback
,
396 result
= usb_submit_urb(port
->read_urb
, GFP_KERNEL
);
398 dev_err(&port
->dev
, "%s - failed resubmitting read urb, "
399 "error %d\n", __func__
, result
);
403 /* Configure the termios structure */
404 cp210x_get_termios(tty
, port
);
408 static void cp210x_cleanup(struct usb_serial_port
*port
)
410 struct usb_serial
*serial
= port
->serial
;
412 dbg("%s - port %d", __func__
, port
->number
);
415 /* shutdown any bulk reads that might be going on */
416 if (serial
->num_bulk_out
)
417 usb_kill_urb(port
->write_urb
);
418 if (serial
->num_bulk_in
)
419 usb_kill_urb(port
->read_urb
);
423 static void cp210x_close(struct usb_serial_port
*port
)
425 dbg("%s - port %d", __func__
, port
->number
);
427 /* shutdown our urbs */
428 dbg("%s - shutting down urbs", __func__
);
429 usb_kill_urb(port
->write_urb
);
430 usb_kill_urb(port
->read_urb
);
432 mutex_lock(&port
->serial
->disc_mutex
);
433 if (!port
->serial
->disconnected
)
434 cp210x_set_config_single(port
, CP210X_IFC_ENABLE
, UART_DISABLE
);
435 mutex_unlock(&port
->serial
->disc_mutex
);
440 * Reads the baud rate, data bits, parity, stop bits and flow control mode
441 * from the device, corrects any unsupported values, and configures the
442 * termios structure to reflect the state of the device
444 static void cp210x_get_termios(struct tty_struct
*tty
,
445 struct usb_serial_port
*port
)
450 cp210x_get_termios_port(tty
->driver_data
,
451 &tty
->termios
->c_cflag
, &baud
);
452 tty_encode_baud_rate(tty
, baud
, baud
);
458 cp210x_get_termios_port(port
, &cflag
, &baud
);
463 * cp210x_get_termios_port
464 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
466 static void cp210x_get_termios_port(struct usb_serial_port
*port
,
467 unsigned int *cflagp
, unsigned int *baudp
)
469 unsigned int cflag
, modem_ctl
[4];
473 dbg("%s - port %d", __func__
, port
->number
);
475 cp210x_get_config(port
, CP210X_GET_BAUDDIV
, &baud
, 2);
476 /* Convert to baudrate */
478 baud
= cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ
+ baud
/2)/ baud
);
480 dbg("%s - baud rate = %d", __func__
, baud
);
485 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
487 switch (bits
& BITS_DATA_MASK
) {
489 dbg("%s - data bits = 5", __func__
);
493 dbg("%s - data bits = 6", __func__
);
497 dbg("%s - data bits = 7", __func__
);
501 dbg("%s - data bits = 8", __func__
);
505 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
508 bits
&= ~BITS_DATA_MASK
;
510 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
513 dbg("%s - Unknown number of data bits, using 8", __func__
);
515 bits
&= ~BITS_DATA_MASK
;
517 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
521 switch (bits
& BITS_PARITY_MASK
) {
522 case BITS_PARITY_NONE
:
523 dbg("%s - parity = NONE", __func__
);
526 case BITS_PARITY_ODD
:
527 dbg("%s - parity = ODD", __func__
);
528 cflag
|= (PARENB
|PARODD
);
530 case BITS_PARITY_EVEN
:
531 dbg("%s - parity = EVEN", __func__
);
535 case BITS_PARITY_MARK
:
536 dbg("%s - parity = MARK (not supported, disabling parity)",
539 bits
&= ~BITS_PARITY_MASK
;
540 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
542 case BITS_PARITY_SPACE
:
543 dbg("%s - parity = SPACE (not supported, disabling parity)",
546 bits
&= ~BITS_PARITY_MASK
;
547 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
550 dbg("%s - Unknown parity mode, disabling parity", __func__
);
552 bits
&= ~BITS_PARITY_MASK
;
553 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
558 switch (bits
& BITS_STOP_MASK
) {
560 dbg("%s - stop bits = 1", __func__
);
563 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
565 bits
&= ~BITS_STOP_MASK
;
566 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
569 dbg("%s - stop bits = 2", __func__
);
573 dbg("%s - Unknown number of stop bits, using 1 stop bit",
575 bits
&= ~BITS_STOP_MASK
;
576 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
580 cp210x_get_config(port
, CP210X_GET_FLOW
, modem_ctl
, 16);
581 if (modem_ctl
[0] & 0x0008) {
582 dbg("%s - flow control = CRTSCTS", __func__
);
585 dbg("%s - flow control = NONE", __func__
);
592 static void cp210x_set_termios(struct tty_struct
*tty
,
593 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
595 unsigned int cflag
, old_cflag
;
596 unsigned int baud
= 0, bits
;
597 unsigned int modem_ctl
[4];
599 dbg("%s - port %d", __func__
, port
->number
);
604 tty
->termios
->c_cflag
&= ~CMSPAR
;
605 cflag
= tty
->termios
->c_cflag
;
606 old_cflag
= old_termios
->c_cflag
;
607 baud
= cp210x_quantise_baudrate(tty_get_baud_rate(tty
));
609 /* If the baud rate is to be updated*/
610 if (baud
!= tty_termios_baud_rate(old_termios
) && baud
!= 0) {
611 dbg("%s - Setting baud rate to %d baud", __func__
,
613 if (cp210x_set_config_single(port
, CP210X_SET_BAUDDIV
,
614 ((BAUD_RATE_GEN_FREQ
+ baud
/2) / baud
))) {
615 dbg("Baud rate requested not supported by device\n");
616 baud
= tty_termios_baud_rate(old_termios
);
619 /* Report back the resulting baud rate */
620 tty_encode_baud_rate(tty
, baud
, baud
);
622 /* If the number of data bits is to be updated */
623 if ((cflag
& CSIZE
) != (old_cflag
& CSIZE
)) {
624 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
625 bits
&= ~BITS_DATA_MASK
;
626 switch (cflag
& CSIZE
) {
629 dbg("%s - data bits = 5", __func__
);
633 dbg("%s - data bits = 6", __func__
);
637 dbg("%s - data bits = 7", __func__
);
641 dbg("%s - data bits = 8", __func__
);
645 dbg("%s - data bits = 9", __func__);
648 dbg("cp210x driver does not "
649 "support the number of bits requested,"
650 " using 8 bit mode\n");
654 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
655 dbg("Number of data bits requested "
656 "not supported by device\n");
659 if ((cflag
& (PARENB
|PARODD
)) != (old_cflag
& (PARENB
|PARODD
))) {
660 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
661 bits
&= ~BITS_PARITY_MASK
;
662 if (cflag
& PARENB
) {
663 if (cflag
& PARODD
) {
664 bits
|= BITS_PARITY_ODD
;
665 dbg("%s - parity = ODD", __func__
);
667 bits
|= BITS_PARITY_EVEN
;
668 dbg("%s - parity = EVEN", __func__
);
671 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
672 dbg("Parity mode not supported "
676 if ((cflag
& CSTOPB
) != (old_cflag
& CSTOPB
)) {
677 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
678 bits
&= ~BITS_STOP_MASK
;
679 if (cflag
& CSTOPB
) {
681 dbg("%s - stop bits = 2", __func__
);
684 dbg("%s - stop bits = 1", __func__
);
686 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
687 dbg("Number of stop bits requested "
688 "not supported by device\n");
691 if ((cflag
& CRTSCTS
) != (old_cflag
& CRTSCTS
)) {
692 cp210x_get_config(port
, CP210X_GET_FLOW
, modem_ctl
, 16);
693 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
694 __func__
, modem_ctl
[0], modem_ctl
[1],
695 modem_ctl
[2], modem_ctl
[3]);
697 if (cflag
& CRTSCTS
) {
698 modem_ctl
[0] &= ~0x7B;
699 modem_ctl
[0] |= 0x09;
701 dbg("%s - flow control = CRTSCTS", __func__
);
703 modem_ctl
[0] &= ~0x7B;
704 modem_ctl
[0] |= 0x01;
705 modem_ctl
[1] |= 0x40;
706 dbg("%s - flow control = NONE", __func__
);
709 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
710 __func__
, modem_ctl
[0], modem_ctl
[1],
711 modem_ctl
[2], modem_ctl
[3]);
712 cp210x_set_config(port
, CP210X_SET_FLOW
, modem_ctl
, 16);
717 static int cp210x_tiocmset (struct tty_struct
*tty
, struct file
*file
,
718 unsigned int set
, unsigned int clear
)
720 struct usb_serial_port
*port
= tty
->driver_data
;
721 return cp210x_tiocmset_port(port
, file
, set
, clear
);
724 static int cp210x_tiocmset_port(struct usb_serial_port
*port
, struct file
*file
,
725 unsigned int set
, unsigned int clear
)
727 unsigned int control
= 0;
729 dbg("%s - port %d", __func__
, port
->number
);
731 if (set
& TIOCM_RTS
) {
732 control
|= CONTROL_RTS
;
733 control
|= CONTROL_WRITE_RTS
;
735 if (set
& TIOCM_DTR
) {
736 control
|= CONTROL_DTR
;
737 control
|= CONTROL_WRITE_DTR
;
739 if (clear
& TIOCM_RTS
) {
740 control
&= ~CONTROL_RTS
;
741 control
|= CONTROL_WRITE_RTS
;
743 if (clear
& TIOCM_DTR
) {
744 control
&= ~CONTROL_DTR
;
745 control
|= CONTROL_WRITE_DTR
;
748 dbg("%s - control = 0x%.4x", __func__
, control
);
750 return cp210x_set_config(port
, CP210X_SET_MHS
, &control
, 2);
753 static void cp210x_dtr_rts(struct usb_serial_port
*p
, int on
)
756 cp210x_tiocmset_port(p
, NULL
, TIOCM_DTR
|TIOCM_RTS
, 0);
758 cp210x_tiocmset_port(p
, NULL
, 0, TIOCM_DTR
|TIOCM_RTS
);
761 static int cp210x_tiocmget (struct tty_struct
*tty
, struct file
*file
)
763 struct usb_serial_port
*port
= tty
->driver_data
;
764 unsigned int control
;
767 dbg("%s - port %d", __func__
, port
->number
);
769 cp210x_get_config(port
, CP210X_GET_MDMSTS
, &control
, 1);
771 result
= ((control
& CONTROL_DTR
) ? TIOCM_DTR
: 0)
772 |((control
& CONTROL_RTS
) ? TIOCM_RTS
: 0)
773 |((control
& CONTROL_CTS
) ? TIOCM_CTS
: 0)
774 |((control
& CONTROL_DSR
) ? TIOCM_DSR
: 0)
775 |((control
& CONTROL_RING
)? TIOCM_RI
: 0)
776 |((control
& CONTROL_DCD
) ? TIOCM_CD
: 0);
778 dbg("%s - control = 0x%.2x", __func__
, control
);
783 static int cp210x_carrier_raised(struct usb_serial_port
*p
)
785 unsigned int control
;
786 cp210x_get_config(p
, CP210X_GET_MDMSTS
, &control
, 1);
787 if (control
& CONTROL_DCD
)
792 static void cp210x_break_ctl (struct tty_struct
*tty
, int break_state
)
794 struct usb_serial_port
*port
= tty
->driver_data
;
797 dbg("%s - port %d", __func__
, port
->number
);
798 if (break_state
== 0)
802 dbg("%s - turning break %s", __func__
,
803 state
== BREAK_OFF
? "off" : "on");
804 cp210x_set_config(port
, CP210X_SET_BREAK
, &state
, 2);
807 static int cp210x_startup(struct usb_serial
*serial
)
809 /* cp210x buffers behave strangely unless device is reset */
810 usb_reset_device(serial
->dev
);
814 static void cp210x_disconnect(struct usb_serial
*serial
)
820 /* Stop reads and writes on all ports */
821 for (i
= 0; i
< serial
->num_ports
; ++i
)
822 cp210x_cleanup(serial
->port
[i
]);
825 static int __init
cp210x_init(void)
829 retval
= usb_serial_register(&cp210x_device
);
831 return retval
; /* Failed to register */
833 retval
= usb_register(&cp210x_driver
);
835 /* Failed to register */
836 usb_serial_deregister(&cp210x_device
);
841 printk(KERN_INFO KBUILD_MODNAME
": " DRIVER_VERSION
":"
846 static void __exit
cp210x_exit(void)
848 usb_deregister(&cp210x_driver
);
849 usb_serial_deregister(&cp210x_device
);
852 module_init(cp210x_init
);
853 module_exit(cp210x_exit
);
855 MODULE_DESCRIPTION(DRIVER_DESC
);
856 MODULE_VERSION(DRIVER_VERSION
);
857 MODULE_LICENSE("GPL");
859 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
860 MODULE_PARM_DESC(debug
, "Enable verbose debugging messages");