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(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
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(0x0489, 0xE003) }, /* 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(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
65 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
66 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
67 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
68 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
69 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
70 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
71 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
72 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
73 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
74 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
75 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
76 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
77 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
78 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
79 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
80 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
81 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
82 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
83 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
84 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
85 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
86 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
87 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
88 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
89 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
90 { USB_DEVICE(0x10C4, 0x8149) }, /* West Mountain Radio Computerized Battery Analyzer */
91 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
92 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
93 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
94 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
95 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
96 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
97 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
98 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
99 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
100 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
101 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
102 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
103 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
104 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
105 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
106 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
107 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */
108 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesys 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, 0x8411) }, /* Kyocera GPS Module */
114 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
115 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
116 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
117 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
118 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
119 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
120 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
121 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
122 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
123 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
124 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
125 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
126 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
127 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
128 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
129 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
130 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
131 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
132 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
133 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
134 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
135 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
136 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
137 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
138 { } /* Terminating Entry */
141 MODULE_DEVICE_TABLE(usb
, id_table
);
143 static struct usb_driver cp210x_driver
= {
145 .probe
= usb_serial_probe
,
146 .disconnect
= usb_serial_disconnect
,
147 .id_table
= id_table
,
151 static struct usb_serial_driver cp210x_device
= {
153 .owner
= THIS_MODULE
,
156 .usb_driver
= &cp210x_driver
,
157 .id_table
= id_table
,
160 .bulk_out_size
= 256,
162 .close
= cp210x_close
,
163 .break_ctl
= cp210x_break_ctl
,
164 .set_termios
= cp210x_set_termios
,
165 .tiocmget
= cp210x_tiocmget
,
166 .tiocmset
= cp210x_tiocmset
,
167 .attach
= cp210x_startup
,
168 .dtr_rts
= cp210x_dtr_rts
,
169 .carrier_raised
= cp210x_carrier_raised
172 /* Config request types */
173 #define REQTYPE_HOST_TO_DEVICE 0x41
174 #define REQTYPE_DEVICE_TO_HOST 0xc1
176 /* Config request codes */
177 #define CP210X_IFC_ENABLE 0x00
178 #define CP210X_SET_BAUDDIV 0x01
179 #define CP210X_GET_BAUDDIV 0x02
180 #define CP210X_SET_LINE_CTL 0x03
181 #define CP210X_GET_LINE_CTL 0x04
182 #define CP210X_SET_BREAK 0x05
183 #define CP210X_IMM_CHAR 0x06
184 #define CP210X_SET_MHS 0x07
185 #define CP210X_GET_MDMSTS 0x08
186 #define CP210X_SET_XON 0x09
187 #define CP210X_SET_XOFF 0x0A
188 #define CP210X_SET_EVENTMASK 0x0B
189 #define CP210X_GET_EVENTMASK 0x0C
190 #define CP210X_SET_CHAR 0x0D
191 #define CP210X_GET_CHARS 0x0E
192 #define CP210X_GET_PROPS 0x0F
193 #define CP210X_GET_COMM_STATUS 0x10
194 #define CP210X_RESET 0x11
195 #define CP210X_PURGE 0x12
196 #define CP210X_SET_FLOW 0x13
197 #define CP210X_GET_FLOW 0x14
198 #define CP210X_EMBED_EVENTS 0x15
199 #define CP210X_GET_EVENTSTATE 0x16
200 #define CP210X_SET_CHARS 0x19
202 /* CP210X_IFC_ENABLE */
203 #define UART_ENABLE 0x0001
204 #define UART_DISABLE 0x0000
206 /* CP210X_(SET|GET)_BAUDDIV */
207 #define BAUD_RATE_GEN_FREQ 0x384000
209 /* CP210X_(SET|GET)_LINE_CTL */
210 #define BITS_DATA_MASK 0X0f00
211 #define BITS_DATA_5 0X0500
212 #define BITS_DATA_6 0X0600
213 #define BITS_DATA_7 0X0700
214 #define BITS_DATA_8 0X0800
215 #define BITS_DATA_9 0X0900
217 #define BITS_PARITY_MASK 0x00f0
218 #define BITS_PARITY_NONE 0x0000
219 #define BITS_PARITY_ODD 0x0010
220 #define BITS_PARITY_EVEN 0x0020
221 #define BITS_PARITY_MARK 0x0030
222 #define BITS_PARITY_SPACE 0x0040
224 #define BITS_STOP_MASK 0x000f
225 #define BITS_STOP_1 0x0000
226 #define BITS_STOP_1_5 0x0001
227 #define BITS_STOP_2 0x0002
229 /* CP210X_SET_BREAK */
230 #define BREAK_ON 0x0001
231 #define BREAK_OFF 0x0000
233 /* CP210X_(SET_MHS|GET_MDMSTS) */
234 #define CONTROL_DTR 0x0001
235 #define CONTROL_RTS 0x0002
236 #define CONTROL_CTS 0x0010
237 #define CONTROL_DSR 0x0020
238 #define CONTROL_RING 0x0040
239 #define CONTROL_DCD 0x0080
240 #define CONTROL_WRITE_DTR 0x0100
241 #define CONTROL_WRITE_RTS 0x0200
245 * Reads from the CP210x configuration registers
246 * 'size' is specified in bytes.
247 * 'data' is a pointer to a pre-allocated array of integers large
248 * enough to hold 'size' bytes (with 4 bytes to each integer)
250 static int cp210x_get_config(struct usb_serial_port
*port
, u8 request
,
251 unsigned int *data
, int size
)
253 struct usb_serial
*serial
= port
->serial
;
255 int result
, i
, length
;
257 /* Number of integers required to contain the array */
258 length
= (((size
- 1) | 3) + 1)/4;
260 buf
= kcalloc(length
, sizeof(__le32
), GFP_KERNEL
);
262 dev_err(&port
->dev
, "%s - out of memory.\n", __func__
);
266 /* Issue the request, attempting to read 'size' bytes */
267 result
= usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
268 request
, REQTYPE_DEVICE_TO_HOST
, 0x0000,
271 /* Convert data into an array of integers */
272 for (i
= 0; i
< length
; i
++)
273 data
[i
] = le32_to_cpu(buf
[i
]);
277 if (result
!= size
) {
278 dbg("%s - Unable to send config request, "
279 "request=0x%x size=%d result=%d\n",
280 __func__
, request
, size
, result
);
289 * Writes to the CP210x configuration registers
290 * Values less than 16 bits wide are sent directly
291 * 'size' is specified in bytes.
293 static int cp210x_set_config(struct usb_serial_port
*port
, u8 request
,
294 unsigned int *data
, int size
)
296 struct usb_serial
*serial
= port
->serial
;
298 int result
, i
, length
;
300 /* Number of integers required to contain the array */
301 length
= (((size
- 1) | 3) + 1)/4;
303 buf
= kmalloc(length
* sizeof(__le32
), GFP_KERNEL
);
305 dev_err(&port
->dev
, "%s - out of memory.\n",
310 /* Array of integers into bytes */
311 for (i
= 0; i
< length
; i
++)
312 buf
[i
] = cpu_to_le32(data
[i
]);
315 result
= usb_control_msg(serial
->dev
,
316 usb_sndctrlpipe(serial
->dev
, 0),
317 request
, REQTYPE_HOST_TO_DEVICE
, 0x0000,
320 result
= usb_control_msg(serial
->dev
,
321 usb_sndctrlpipe(serial
->dev
, 0),
322 request
, REQTYPE_HOST_TO_DEVICE
, data
[0],
328 if ((size
> 2 && result
!= size
) || result
< 0) {
329 dbg("%s - Unable to send request, "
330 "request=0x%x size=%d result=%d\n",
331 __func__
, request
, size
, result
);
339 * cp210x_set_config_single
340 * Convenience function for calling cp210x_set_config on single data values
341 * without requiring an integer pointer
343 static inline int cp210x_set_config_single(struct usb_serial_port
*port
,
344 u8 request
, unsigned int data
)
346 return cp210x_set_config(port
, request
, &data
, 2);
350 * cp210x_quantise_baudrate
351 * Quantises the baud rate as per AN205 Table 1
353 static unsigned int cp210x_quantise_baudrate(unsigned int baud
) {
354 if (baud
<= 56) baud
= 0;
355 else if (baud
<= 300) baud
= 300;
356 else if (baud
<= 600) baud
= 600;
357 else if (baud
<= 1200) baud
= 1200;
358 else if (baud
<= 1800) baud
= 1800;
359 else if (baud
<= 2400) baud
= 2400;
360 else if (baud
<= 4000) baud
= 4000;
361 else if (baud
<= 4803) baud
= 4800;
362 else if (baud
<= 7207) baud
= 7200;
363 else if (baud
<= 9612) baud
= 9600;
364 else if (baud
<= 14428) baud
= 14400;
365 else if (baud
<= 16062) baud
= 16000;
366 else if (baud
<= 19250) baud
= 19200;
367 else if (baud
<= 28912) baud
= 28800;
368 else if (baud
<= 38601) baud
= 38400;
369 else if (baud
<= 51558) baud
= 51200;
370 else if (baud
<= 56280) baud
= 56000;
371 else if (baud
<= 58053) baud
= 57600;
372 else if (baud
<= 64111) baud
= 64000;
373 else if (baud
<= 77608) baud
= 76800;
374 else if (baud
<= 117028) baud
= 115200;
375 else if (baud
<= 129347) baud
= 128000;
376 else if (baud
<= 156868) baud
= 153600;
377 else if (baud
<= 237832) baud
= 230400;
378 else if (baud
<= 254234) baud
= 250000;
379 else if (baud
<= 273066) baud
= 256000;
380 else if (baud
<= 491520) baud
= 460800;
381 else if (baud
<= 567138) baud
= 500000;
382 else if (baud
<= 670254) baud
= 576000;
383 else if (baud
<= 1053257) baud
= 921600;
384 else if (baud
<= 1474560) baud
= 1228800;
385 else if (baud
<= 2457600) baud
= 1843200;
390 static int cp210x_open(struct tty_struct
*tty
, struct usb_serial_port
*port
)
394 dbg("%s - port %d", __func__
, port
->number
);
396 if (cp210x_set_config_single(port
, CP210X_IFC_ENABLE
, UART_ENABLE
)) {
397 dev_err(&port
->dev
, "%s - Unable to enable UART\n",
402 result
= usb_serial_generic_open(tty
, port
);
406 /* Configure the termios structure */
407 cp210x_get_termios(tty
, port
);
411 static void cp210x_close(struct usb_serial_port
*port
)
413 dbg("%s - port %d", __func__
, port
->number
);
415 usb_serial_generic_close(port
);
417 mutex_lock(&port
->serial
->disc_mutex
);
418 if (!port
->serial
->disconnected
)
419 cp210x_set_config_single(port
, CP210X_IFC_ENABLE
, UART_DISABLE
);
420 mutex_unlock(&port
->serial
->disc_mutex
);
425 * Reads the baud rate, data bits, parity, stop bits and flow control mode
426 * from the device, corrects any unsupported values, and configures the
427 * termios structure to reflect the state of the device
429 static void cp210x_get_termios(struct tty_struct
*tty
,
430 struct usb_serial_port
*port
)
435 cp210x_get_termios_port(tty
->driver_data
,
436 &tty
->termios
->c_cflag
, &baud
);
437 tty_encode_baud_rate(tty
, baud
, baud
);
443 cp210x_get_termios_port(port
, &cflag
, &baud
);
448 * cp210x_get_termios_port
449 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
451 static void cp210x_get_termios_port(struct usb_serial_port
*port
,
452 unsigned int *cflagp
, unsigned int *baudp
)
454 unsigned int cflag
, modem_ctl
[4];
458 dbg("%s - port %d", __func__
, port
->number
);
460 cp210x_get_config(port
, CP210X_GET_BAUDDIV
, &baud
, 2);
461 /* Convert to baudrate */
463 baud
= cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ
+ baud
/2)/ baud
);
465 dbg("%s - baud rate = %d", __func__
, baud
);
470 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
472 switch (bits
& BITS_DATA_MASK
) {
474 dbg("%s - data bits = 5", __func__
);
478 dbg("%s - data bits = 6", __func__
);
482 dbg("%s - data bits = 7", __func__
);
486 dbg("%s - data bits = 8", __func__
);
490 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
493 bits
&= ~BITS_DATA_MASK
;
495 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
498 dbg("%s - Unknown number of data bits, using 8", __func__
);
500 bits
&= ~BITS_DATA_MASK
;
502 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
506 switch (bits
& BITS_PARITY_MASK
) {
507 case BITS_PARITY_NONE
:
508 dbg("%s - parity = NONE", __func__
);
511 case BITS_PARITY_ODD
:
512 dbg("%s - parity = ODD", __func__
);
513 cflag
|= (PARENB
|PARODD
);
515 case BITS_PARITY_EVEN
:
516 dbg("%s - parity = EVEN", __func__
);
520 case BITS_PARITY_MARK
:
521 dbg("%s - parity = MARK (not supported, disabling parity)",
524 bits
&= ~BITS_PARITY_MASK
;
525 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
527 case BITS_PARITY_SPACE
:
528 dbg("%s - parity = SPACE (not supported, disabling parity)",
531 bits
&= ~BITS_PARITY_MASK
;
532 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
535 dbg("%s - Unknown parity mode, disabling parity", __func__
);
537 bits
&= ~BITS_PARITY_MASK
;
538 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
543 switch (bits
& BITS_STOP_MASK
) {
545 dbg("%s - stop bits = 1", __func__
);
548 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
550 bits
&= ~BITS_STOP_MASK
;
551 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
554 dbg("%s - stop bits = 2", __func__
);
558 dbg("%s - Unknown number of stop bits, using 1 stop bit",
560 bits
&= ~BITS_STOP_MASK
;
561 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
565 cp210x_get_config(port
, CP210X_GET_FLOW
, modem_ctl
, 16);
566 if (modem_ctl
[0] & 0x0008) {
567 dbg("%s - flow control = CRTSCTS", __func__
);
570 dbg("%s - flow control = NONE", __func__
);
577 static void cp210x_set_termios(struct tty_struct
*tty
,
578 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
580 unsigned int cflag
, old_cflag
;
581 unsigned int baud
= 0, bits
;
582 unsigned int modem_ctl
[4];
584 dbg("%s - port %d", __func__
, port
->number
);
589 tty
->termios
->c_cflag
&= ~CMSPAR
;
590 cflag
= tty
->termios
->c_cflag
;
591 old_cflag
= old_termios
->c_cflag
;
592 baud
= cp210x_quantise_baudrate(tty_get_baud_rate(tty
));
594 /* If the baud rate is to be updated*/
595 if (baud
!= tty_termios_baud_rate(old_termios
) && baud
!= 0) {
596 dbg("%s - Setting baud rate to %d baud", __func__
,
598 if (cp210x_set_config_single(port
, CP210X_SET_BAUDDIV
,
599 ((BAUD_RATE_GEN_FREQ
+ baud
/2) / baud
))) {
600 dbg("Baud rate requested not supported by device");
601 baud
= tty_termios_baud_rate(old_termios
);
604 /* Report back the resulting baud rate */
605 tty_encode_baud_rate(tty
, baud
, baud
);
607 /* If the number of data bits is to be updated */
608 if ((cflag
& CSIZE
) != (old_cflag
& CSIZE
)) {
609 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
610 bits
&= ~BITS_DATA_MASK
;
611 switch (cflag
& CSIZE
) {
614 dbg("%s - data bits = 5", __func__
);
618 dbg("%s - data bits = 6", __func__
);
622 dbg("%s - data bits = 7", __func__
);
626 dbg("%s - data bits = 8", __func__
);
630 dbg("%s - data bits = 9", __func__);
633 dbg("cp210x driver does not "
634 "support the number of bits requested,"
635 " using 8 bit mode\n");
639 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
640 dbg("Number of data bits requested "
641 "not supported by device\n");
644 if ((cflag
& (PARENB
|PARODD
)) != (old_cflag
& (PARENB
|PARODD
))) {
645 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
646 bits
&= ~BITS_PARITY_MASK
;
647 if (cflag
& PARENB
) {
648 if (cflag
& PARODD
) {
649 bits
|= BITS_PARITY_ODD
;
650 dbg("%s - parity = ODD", __func__
);
652 bits
|= BITS_PARITY_EVEN
;
653 dbg("%s - parity = EVEN", __func__
);
656 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
657 dbg("Parity mode not supported "
661 if ((cflag
& CSTOPB
) != (old_cflag
& CSTOPB
)) {
662 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
663 bits
&= ~BITS_STOP_MASK
;
664 if (cflag
& CSTOPB
) {
666 dbg("%s - stop bits = 2", __func__
);
669 dbg("%s - stop bits = 1", __func__
);
671 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
672 dbg("Number of stop bits requested "
673 "not supported by device\n");
676 if ((cflag
& CRTSCTS
) != (old_cflag
& CRTSCTS
)) {
677 cp210x_get_config(port
, CP210X_GET_FLOW
, modem_ctl
, 16);
678 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
679 __func__
, modem_ctl
[0], modem_ctl
[1],
680 modem_ctl
[2], modem_ctl
[3]);
682 if (cflag
& CRTSCTS
) {
683 modem_ctl
[0] &= ~0x7B;
684 modem_ctl
[0] |= 0x09;
686 dbg("%s - flow control = CRTSCTS", __func__
);
688 modem_ctl
[0] &= ~0x7B;
689 modem_ctl
[0] |= 0x01;
690 modem_ctl
[1] |= 0x40;
691 dbg("%s - flow control = NONE", __func__
);
694 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
695 __func__
, modem_ctl
[0], modem_ctl
[1],
696 modem_ctl
[2], modem_ctl
[3]);
697 cp210x_set_config(port
, CP210X_SET_FLOW
, modem_ctl
, 16);
702 static int cp210x_tiocmset (struct tty_struct
*tty
, struct file
*file
,
703 unsigned int set
, unsigned int clear
)
705 struct usb_serial_port
*port
= tty
->driver_data
;
706 return cp210x_tiocmset_port(port
, file
, set
, clear
);
709 static int cp210x_tiocmset_port(struct usb_serial_port
*port
, struct file
*file
,
710 unsigned int set
, unsigned int clear
)
712 unsigned int control
= 0;
714 dbg("%s - port %d", __func__
, port
->number
);
716 if (set
& TIOCM_RTS
) {
717 control
|= CONTROL_RTS
;
718 control
|= CONTROL_WRITE_RTS
;
720 if (set
& TIOCM_DTR
) {
721 control
|= CONTROL_DTR
;
722 control
|= CONTROL_WRITE_DTR
;
724 if (clear
& TIOCM_RTS
) {
725 control
&= ~CONTROL_RTS
;
726 control
|= CONTROL_WRITE_RTS
;
728 if (clear
& TIOCM_DTR
) {
729 control
&= ~CONTROL_DTR
;
730 control
|= CONTROL_WRITE_DTR
;
733 dbg("%s - control = 0x%.4x", __func__
, control
);
735 return cp210x_set_config(port
, CP210X_SET_MHS
, &control
, 2);
738 static void cp210x_dtr_rts(struct usb_serial_port
*p
, int on
)
741 cp210x_tiocmset_port(p
, NULL
, TIOCM_DTR
|TIOCM_RTS
, 0);
743 cp210x_tiocmset_port(p
, NULL
, 0, TIOCM_DTR
|TIOCM_RTS
);
746 static int cp210x_tiocmget (struct tty_struct
*tty
, struct file
*file
)
748 struct usb_serial_port
*port
= tty
->driver_data
;
749 unsigned int control
;
752 dbg("%s - port %d", __func__
, port
->number
);
754 cp210x_get_config(port
, CP210X_GET_MDMSTS
, &control
, 1);
756 result
= ((control
& CONTROL_DTR
) ? TIOCM_DTR
: 0)
757 |((control
& CONTROL_RTS
) ? TIOCM_RTS
: 0)
758 |((control
& CONTROL_CTS
) ? TIOCM_CTS
: 0)
759 |((control
& CONTROL_DSR
) ? TIOCM_DSR
: 0)
760 |((control
& CONTROL_RING
)? TIOCM_RI
: 0)
761 |((control
& CONTROL_DCD
) ? TIOCM_CD
: 0);
763 dbg("%s - control = 0x%.2x", __func__
, control
);
768 static int cp210x_carrier_raised(struct usb_serial_port
*p
)
770 unsigned int control
;
771 cp210x_get_config(p
, CP210X_GET_MDMSTS
, &control
, 1);
772 if (control
& CONTROL_DCD
)
777 static void cp210x_break_ctl (struct tty_struct
*tty
, int break_state
)
779 struct usb_serial_port
*port
= tty
->driver_data
;
782 dbg("%s - port %d", __func__
, port
->number
);
783 if (break_state
== 0)
787 dbg("%s - turning break %s", __func__
,
788 state
== BREAK_OFF
? "off" : "on");
789 cp210x_set_config(port
, CP210X_SET_BREAK
, &state
, 2);
792 static int cp210x_startup(struct usb_serial
*serial
)
794 /* cp210x buffers behave strangely unless device is reset */
795 usb_reset_device(serial
->dev
);
799 static int __init
cp210x_init(void)
803 retval
= usb_serial_register(&cp210x_device
);
805 return retval
; /* Failed to register */
807 retval
= usb_register(&cp210x_driver
);
809 /* Failed to register */
810 usb_serial_deregister(&cp210x_device
);
815 printk(KERN_INFO KBUILD_MODNAME
": " DRIVER_VERSION
":"
820 static void __exit
cp210x_exit(void)
822 usb_deregister(&cp210x_driver
);
823 usb_serial_deregister(&cp210x_device
);
826 module_init(cp210x_init
);
827 module_exit(cp210x_exit
);
829 MODULE_DESCRIPTION(DRIVER_DESC
);
830 MODULE_VERSION(DRIVER_VERSION
);
831 MODULE_LICENSE("GPL");
833 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
834 MODULE_PARM_DESC(debug
, "Enable verbose debugging messages");