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
*);
45 static int cp210x_tiocmset(struct tty_struct
*, unsigned int, unsigned int);
46 static int cp210x_tiocmset_port(struct usb_serial_port
*port
,
47 unsigned int, unsigned int);
48 static void cp210x_break_ctl(struct tty_struct
*, int);
49 static int cp210x_startup(struct usb_serial
*);
50 static void cp210x_dtr_rts(struct usb_serial_port
*p
, int on
);
54 static const struct usb_device_id id_table
[] = {
55 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
56 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
57 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
58 { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
59 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
60 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
61 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
62 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
63 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
64 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
65 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
66 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
67 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
68 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
69 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
70 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
71 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
72 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
73 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
74 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
75 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
76 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
77 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
78 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
79 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
80 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
81 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
82 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
83 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
84 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
85 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
86 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
87 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
88 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
89 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
90 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
91 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
92 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
93 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
94 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
95 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
96 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
97 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
98 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
99 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
100 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
101 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
102 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
103 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
104 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
105 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
106 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
107 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
108 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
109 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
110 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
111 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
112 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
113 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
114 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
115 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
116 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
117 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
118 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
119 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
120 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
121 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
122 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
123 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
124 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
125 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
126 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
127 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
128 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
129 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
130 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
131 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
132 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
133 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
134 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
135 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
136 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
137 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
138 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
139 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
140 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
141 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
142 { } /* Terminating Entry */
145 MODULE_DEVICE_TABLE(usb
, id_table
);
147 static struct usb_driver cp210x_driver
= {
149 .probe
= usb_serial_probe
,
150 .disconnect
= usb_serial_disconnect
,
151 .id_table
= id_table
,
155 static struct usb_serial_driver cp210x_device
= {
157 .owner
= THIS_MODULE
,
160 .usb_driver
= &cp210x_driver
,
161 .id_table
= id_table
,
164 .bulk_out_size
= 256,
166 .close
= cp210x_close
,
167 .break_ctl
= cp210x_break_ctl
,
168 .set_termios
= cp210x_set_termios
,
169 .tiocmget
= cp210x_tiocmget
,
170 .tiocmset
= cp210x_tiocmset
,
171 .attach
= cp210x_startup
,
172 .dtr_rts
= cp210x_dtr_rts
175 /* Config request types */
176 #define REQTYPE_HOST_TO_DEVICE 0x41
177 #define REQTYPE_DEVICE_TO_HOST 0xc1
179 /* Config request codes */
180 #define CP210X_IFC_ENABLE 0x00
181 #define CP210X_SET_BAUDDIV 0x01
182 #define CP210X_GET_BAUDDIV 0x02
183 #define CP210X_SET_LINE_CTL 0x03
184 #define CP210X_GET_LINE_CTL 0x04
185 #define CP210X_SET_BREAK 0x05
186 #define CP210X_IMM_CHAR 0x06
187 #define CP210X_SET_MHS 0x07
188 #define CP210X_GET_MDMSTS 0x08
189 #define CP210X_SET_XON 0x09
190 #define CP210X_SET_XOFF 0x0A
191 #define CP210X_SET_EVENTMASK 0x0B
192 #define CP210X_GET_EVENTMASK 0x0C
193 #define CP210X_SET_CHAR 0x0D
194 #define CP210X_GET_CHARS 0x0E
195 #define CP210X_GET_PROPS 0x0F
196 #define CP210X_GET_COMM_STATUS 0x10
197 #define CP210X_RESET 0x11
198 #define CP210X_PURGE 0x12
199 #define CP210X_SET_FLOW 0x13
200 #define CP210X_GET_FLOW 0x14
201 #define CP210X_EMBED_EVENTS 0x15
202 #define CP210X_GET_EVENTSTATE 0x16
203 #define CP210X_SET_CHARS 0x19
205 /* CP210X_IFC_ENABLE */
206 #define UART_ENABLE 0x0001
207 #define UART_DISABLE 0x0000
209 /* CP210X_(SET|GET)_BAUDDIV */
210 #define BAUD_RATE_GEN_FREQ 0x384000
212 /* CP210X_(SET|GET)_LINE_CTL */
213 #define BITS_DATA_MASK 0X0f00
214 #define BITS_DATA_5 0X0500
215 #define BITS_DATA_6 0X0600
216 #define BITS_DATA_7 0X0700
217 #define BITS_DATA_8 0X0800
218 #define BITS_DATA_9 0X0900
220 #define BITS_PARITY_MASK 0x00f0
221 #define BITS_PARITY_NONE 0x0000
222 #define BITS_PARITY_ODD 0x0010
223 #define BITS_PARITY_EVEN 0x0020
224 #define BITS_PARITY_MARK 0x0030
225 #define BITS_PARITY_SPACE 0x0040
227 #define BITS_STOP_MASK 0x000f
228 #define BITS_STOP_1 0x0000
229 #define BITS_STOP_1_5 0x0001
230 #define BITS_STOP_2 0x0002
232 /* CP210X_SET_BREAK */
233 #define BREAK_ON 0x0001
234 #define BREAK_OFF 0x0000
236 /* CP210X_(SET_MHS|GET_MDMSTS) */
237 #define CONTROL_DTR 0x0001
238 #define CONTROL_RTS 0x0002
239 #define CONTROL_CTS 0x0010
240 #define CONTROL_DSR 0x0020
241 #define CONTROL_RING 0x0040
242 #define CONTROL_DCD 0x0080
243 #define CONTROL_WRITE_DTR 0x0100
244 #define CONTROL_WRITE_RTS 0x0200
248 * Reads from the CP210x configuration registers
249 * 'size' is specified in bytes.
250 * 'data' is a pointer to a pre-allocated array of integers large
251 * enough to hold 'size' bytes (with 4 bytes to each integer)
253 static int cp210x_get_config(struct usb_serial_port
*port
, u8 request
,
254 unsigned int *data
, int size
)
256 struct usb_serial
*serial
= port
->serial
;
258 int result
, i
, length
;
260 /* Number of integers required to contain the array */
261 length
= (((size
- 1) | 3) + 1)/4;
263 buf
= kcalloc(length
, sizeof(__le32
), GFP_KERNEL
);
265 dev_err(&port
->dev
, "%s - out of memory.\n", __func__
);
269 /* Issue the request, attempting to read 'size' bytes */
270 result
= usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
271 request
, REQTYPE_DEVICE_TO_HOST
, 0x0000,
274 /* Convert data into an array of integers */
275 for (i
= 0; i
< length
; i
++)
276 data
[i
] = le32_to_cpu(buf
[i
]);
280 if (result
!= size
) {
281 dbg("%s - Unable to send config request, "
282 "request=0x%x size=%d result=%d\n",
283 __func__
, request
, size
, result
);
292 * Writes to the CP210x configuration registers
293 * Values less than 16 bits wide are sent directly
294 * 'size' is specified in bytes.
296 static int cp210x_set_config(struct usb_serial_port
*port
, u8 request
,
297 unsigned int *data
, int size
)
299 struct usb_serial
*serial
= port
->serial
;
301 int result
, i
, length
;
303 /* Number of integers required to contain the array */
304 length
= (((size
- 1) | 3) + 1)/4;
306 buf
= kmalloc(length
* sizeof(__le32
), GFP_KERNEL
);
308 dev_err(&port
->dev
, "%s - out of memory.\n",
313 /* Array of integers into bytes */
314 for (i
= 0; i
< length
; i
++)
315 buf
[i
] = cpu_to_le32(data
[i
]);
318 result
= usb_control_msg(serial
->dev
,
319 usb_sndctrlpipe(serial
->dev
, 0),
320 request
, REQTYPE_HOST_TO_DEVICE
, 0x0000,
323 result
= usb_control_msg(serial
->dev
,
324 usb_sndctrlpipe(serial
->dev
, 0),
325 request
, REQTYPE_HOST_TO_DEVICE
, data
[0],
331 if ((size
> 2 && result
!= size
) || result
< 0) {
332 dbg("%s - Unable to send request, "
333 "request=0x%x size=%d result=%d\n",
334 __func__
, request
, size
, result
);
342 * cp210x_set_config_single
343 * Convenience function for calling cp210x_set_config on single data values
344 * without requiring an integer pointer
346 static inline int cp210x_set_config_single(struct usb_serial_port
*port
,
347 u8 request
, unsigned int data
)
349 return cp210x_set_config(port
, request
, &data
, 2);
353 * cp210x_quantise_baudrate
354 * Quantises the baud rate as per AN205 Table 1
356 static unsigned int cp210x_quantise_baudrate(unsigned int baud
) {
357 if (baud
<= 56) baud
= 0;
358 else if (baud
<= 300) baud
= 300;
359 else if (baud
<= 600) baud
= 600;
360 else if (baud
<= 1200) baud
= 1200;
361 else if (baud
<= 1800) baud
= 1800;
362 else if (baud
<= 2400) baud
= 2400;
363 else if (baud
<= 4000) baud
= 4000;
364 else if (baud
<= 4803) baud
= 4800;
365 else if (baud
<= 7207) baud
= 7200;
366 else if (baud
<= 9612) baud
= 9600;
367 else if (baud
<= 14428) baud
= 14400;
368 else if (baud
<= 16062) baud
= 16000;
369 else if (baud
<= 19250) baud
= 19200;
370 else if (baud
<= 28912) baud
= 28800;
371 else if (baud
<= 38601) baud
= 38400;
372 else if (baud
<= 51558) baud
= 51200;
373 else if (baud
<= 56280) baud
= 56000;
374 else if (baud
<= 58053) baud
= 57600;
375 else if (baud
<= 64111) baud
= 64000;
376 else if (baud
<= 77608) baud
= 76800;
377 else if (baud
<= 117028) baud
= 115200;
378 else if (baud
<= 129347) baud
= 128000;
379 else if (baud
<= 156868) baud
= 153600;
380 else if (baud
<= 237832) baud
= 230400;
381 else if (baud
<= 254234) baud
= 250000;
382 else if (baud
<= 273066) baud
= 256000;
383 else if (baud
<= 491520) baud
= 460800;
384 else if (baud
<= 567138) baud
= 500000;
385 else if (baud
<= 670254) baud
= 576000;
386 else if (baud
<= 1053257) baud
= 921600;
387 else if (baud
<= 1474560) baud
= 1228800;
388 else if (baud
<= 2457600) baud
= 1843200;
393 static int cp210x_open(struct tty_struct
*tty
, struct usb_serial_port
*port
)
397 dbg("%s - port %d", __func__
, port
->number
);
399 if (cp210x_set_config_single(port
, CP210X_IFC_ENABLE
, UART_ENABLE
)) {
400 dev_err(&port
->dev
, "%s - Unable to enable UART\n",
405 result
= usb_serial_generic_open(tty
, port
);
409 /* Configure the termios structure */
410 cp210x_get_termios(tty
, port
);
414 static void cp210x_close(struct usb_serial_port
*port
)
416 dbg("%s - port %d", __func__
, port
->number
);
418 usb_serial_generic_close(port
);
420 mutex_lock(&port
->serial
->disc_mutex
);
421 if (!port
->serial
->disconnected
)
422 cp210x_set_config_single(port
, CP210X_IFC_ENABLE
, UART_DISABLE
);
423 mutex_unlock(&port
->serial
->disc_mutex
);
428 * Reads the baud rate, data bits, parity, stop bits and flow control mode
429 * from the device, corrects any unsupported values, and configures the
430 * termios structure to reflect the state of the device
432 static void cp210x_get_termios(struct tty_struct
*tty
,
433 struct usb_serial_port
*port
)
438 cp210x_get_termios_port(tty
->driver_data
,
439 &tty
->termios
->c_cflag
, &baud
);
440 tty_encode_baud_rate(tty
, baud
, baud
);
446 cp210x_get_termios_port(port
, &cflag
, &baud
);
451 * cp210x_get_termios_port
452 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
454 static void cp210x_get_termios_port(struct usb_serial_port
*port
,
455 unsigned int *cflagp
, unsigned int *baudp
)
457 unsigned int cflag
, modem_ctl
[4];
461 dbg("%s - port %d", __func__
, port
->number
);
463 cp210x_get_config(port
, CP210X_GET_BAUDDIV
, &baud
, 2);
464 /* Convert to baudrate */
466 baud
= cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ
+ baud
/2)/ baud
);
468 dbg("%s - baud rate = %d", __func__
, baud
);
473 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
475 switch (bits
& BITS_DATA_MASK
) {
477 dbg("%s - data bits = 5", __func__
);
481 dbg("%s - data bits = 6", __func__
);
485 dbg("%s - data bits = 7", __func__
);
489 dbg("%s - data bits = 8", __func__
);
493 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
496 bits
&= ~BITS_DATA_MASK
;
498 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
501 dbg("%s - Unknown number of data bits, using 8", __func__
);
503 bits
&= ~BITS_DATA_MASK
;
505 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
509 switch (bits
& BITS_PARITY_MASK
) {
510 case BITS_PARITY_NONE
:
511 dbg("%s - parity = NONE", __func__
);
514 case BITS_PARITY_ODD
:
515 dbg("%s - parity = ODD", __func__
);
516 cflag
|= (PARENB
|PARODD
);
518 case BITS_PARITY_EVEN
:
519 dbg("%s - parity = EVEN", __func__
);
523 case BITS_PARITY_MARK
:
524 dbg("%s - parity = MARK (not supported, disabling parity)",
527 bits
&= ~BITS_PARITY_MASK
;
528 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
530 case BITS_PARITY_SPACE
:
531 dbg("%s - parity = SPACE (not supported, disabling parity)",
534 bits
&= ~BITS_PARITY_MASK
;
535 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
538 dbg("%s - Unknown parity mode, disabling parity", __func__
);
540 bits
&= ~BITS_PARITY_MASK
;
541 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
546 switch (bits
& BITS_STOP_MASK
) {
548 dbg("%s - stop bits = 1", __func__
);
551 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
553 bits
&= ~BITS_STOP_MASK
;
554 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
557 dbg("%s - stop bits = 2", __func__
);
561 dbg("%s - Unknown number of stop bits, using 1 stop bit",
563 bits
&= ~BITS_STOP_MASK
;
564 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
568 cp210x_get_config(port
, CP210X_GET_FLOW
, modem_ctl
, 16);
569 if (modem_ctl
[0] & 0x0008) {
570 dbg("%s - flow control = CRTSCTS", __func__
);
573 dbg("%s - flow control = NONE", __func__
);
580 static void cp210x_set_termios(struct tty_struct
*tty
,
581 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
583 unsigned int cflag
, old_cflag
;
584 unsigned int baud
= 0, bits
;
585 unsigned int modem_ctl
[4];
587 dbg("%s - port %d", __func__
, port
->number
);
592 tty
->termios
->c_cflag
&= ~CMSPAR
;
593 cflag
= tty
->termios
->c_cflag
;
594 old_cflag
= old_termios
->c_cflag
;
595 baud
= cp210x_quantise_baudrate(tty_get_baud_rate(tty
));
597 /* If the baud rate is to be updated*/
598 if (baud
!= tty_termios_baud_rate(old_termios
) && baud
!= 0) {
599 dbg("%s - Setting baud rate to %d baud", __func__
,
601 if (cp210x_set_config_single(port
, CP210X_SET_BAUDDIV
,
602 ((BAUD_RATE_GEN_FREQ
+ baud
/2) / baud
))) {
603 dbg("Baud rate requested not supported by device");
604 baud
= tty_termios_baud_rate(old_termios
);
607 /* Report back the resulting baud rate */
608 tty_encode_baud_rate(tty
, baud
, baud
);
610 /* If the number of data bits is to be updated */
611 if ((cflag
& CSIZE
) != (old_cflag
& CSIZE
)) {
612 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
613 bits
&= ~BITS_DATA_MASK
;
614 switch (cflag
& CSIZE
) {
617 dbg("%s - data bits = 5", __func__
);
621 dbg("%s - data bits = 6", __func__
);
625 dbg("%s - data bits = 7", __func__
);
629 dbg("%s - data bits = 8", __func__
);
633 dbg("%s - data bits = 9", __func__);
636 dbg("cp210x driver does not "
637 "support the number of bits requested,"
638 " using 8 bit mode\n");
642 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
643 dbg("Number of data bits requested "
644 "not supported by device\n");
647 if ((cflag
& (PARENB
|PARODD
)) != (old_cflag
& (PARENB
|PARODD
))) {
648 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
649 bits
&= ~BITS_PARITY_MASK
;
650 if (cflag
& PARENB
) {
651 if (cflag
& PARODD
) {
652 bits
|= BITS_PARITY_ODD
;
653 dbg("%s - parity = ODD", __func__
);
655 bits
|= BITS_PARITY_EVEN
;
656 dbg("%s - parity = EVEN", __func__
);
659 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
660 dbg("Parity mode not supported "
664 if ((cflag
& CSTOPB
) != (old_cflag
& CSTOPB
)) {
665 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
666 bits
&= ~BITS_STOP_MASK
;
667 if (cflag
& CSTOPB
) {
669 dbg("%s - stop bits = 2", __func__
);
672 dbg("%s - stop bits = 1", __func__
);
674 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
675 dbg("Number of stop bits requested "
676 "not supported by device\n");
679 if ((cflag
& CRTSCTS
) != (old_cflag
& CRTSCTS
)) {
680 cp210x_get_config(port
, CP210X_GET_FLOW
, modem_ctl
, 16);
681 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
682 __func__
, modem_ctl
[0], modem_ctl
[1],
683 modem_ctl
[2], modem_ctl
[3]);
685 if (cflag
& CRTSCTS
) {
686 modem_ctl
[0] &= ~0x7B;
687 modem_ctl
[0] |= 0x09;
689 dbg("%s - flow control = CRTSCTS", __func__
);
691 modem_ctl
[0] &= ~0x7B;
692 modem_ctl
[0] |= 0x01;
693 modem_ctl
[1] |= 0x40;
694 dbg("%s - flow control = NONE", __func__
);
697 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
698 __func__
, modem_ctl
[0], modem_ctl
[1],
699 modem_ctl
[2], modem_ctl
[3]);
700 cp210x_set_config(port
, CP210X_SET_FLOW
, modem_ctl
, 16);
705 static int cp210x_tiocmset (struct tty_struct
*tty
,
706 unsigned int set
, unsigned int clear
)
708 struct usb_serial_port
*port
= tty
->driver_data
;
709 return cp210x_tiocmset_port(port
, set
, clear
);
712 static int cp210x_tiocmset_port(struct usb_serial_port
*port
,
713 unsigned int set
, unsigned int clear
)
715 unsigned int control
= 0;
717 dbg("%s - port %d", __func__
, port
->number
);
719 if (set
& TIOCM_RTS
) {
720 control
|= CONTROL_RTS
;
721 control
|= CONTROL_WRITE_RTS
;
723 if (set
& TIOCM_DTR
) {
724 control
|= CONTROL_DTR
;
725 control
|= CONTROL_WRITE_DTR
;
727 if (clear
& TIOCM_RTS
) {
728 control
&= ~CONTROL_RTS
;
729 control
|= CONTROL_WRITE_RTS
;
731 if (clear
& TIOCM_DTR
) {
732 control
&= ~CONTROL_DTR
;
733 control
|= CONTROL_WRITE_DTR
;
736 dbg("%s - control = 0x%.4x", __func__
, control
);
738 return cp210x_set_config(port
, CP210X_SET_MHS
, &control
, 2);
741 static void cp210x_dtr_rts(struct usb_serial_port
*p
, int on
)
744 cp210x_tiocmset_port(p
, TIOCM_DTR
|TIOCM_RTS
, 0);
746 cp210x_tiocmset_port(p
, 0, TIOCM_DTR
|TIOCM_RTS
);
749 static int cp210x_tiocmget (struct tty_struct
*tty
)
751 struct usb_serial_port
*port
= tty
->driver_data
;
752 unsigned int control
;
755 dbg("%s - port %d", __func__
, port
->number
);
757 cp210x_get_config(port
, CP210X_GET_MDMSTS
, &control
, 1);
759 result
= ((control
& CONTROL_DTR
) ? TIOCM_DTR
: 0)
760 |((control
& CONTROL_RTS
) ? TIOCM_RTS
: 0)
761 |((control
& CONTROL_CTS
) ? TIOCM_CTS
: 0)
762 |((control
& CONTROL_DSR
) ? TIOCM_DSR
: 0)
763 |((control
& CONTROL_RING
)? TIOCM_RI
: 0)
764 |((control
& CONTROL_DCD
) ? TIOCM_CD
: 0);
766 dbg("%s - control = 0x%.2x", __func__
, control
);
771 static void cp210x_break_ctl (struct tty_struct
*tty
, int break_state
)
773 struct usb_serial_port
*port
= tty
->driver_data
;
776 dbg("%s - port %d", __func__
, port
->number
);
777 if (break_state
== 0)
781 dbg("%s - turning break %s", __func__
,
782 state
== BREAK_OFF
? "off" : "on");
783 cp210x_set_config(port
, CP210X_SET_BREAK
, &state
, 2);
786 static int cp210x_startup(struct usb_serial
*serial
)
788 /* cp210x buffers behave strangely unless device is reset */
789 usb_reset_device(serial
->dev
);
793 static int __init
cp210x_init(void)
797 retval
= usb_serial_register(&cp210x_device
);
799 return retval
; /* Failed to register */
801 retval
= usb_register(&cp210x_driver
);
803 /* Failed to register */
804 usb_serial_deregister(&cp210x_device
);
809 printk(KERN_INFO KBUILD_MODNAME
": " DRIVER_VERSION
":"
814 static void __exit
cp210x_exit(void)
816 usb_deregister(&cp210x_driver
);
817 usb_serial_deregister(&cp210x_device
);
820 module_init(cp210x_init
);
821 module_exit(cp210x_exit
);
823 MODULE_DESCRIPTION(DRIVER_DESC
);
824 MODULE_VERSION(DRIVER_VERSION
);
825 MODULE_LICENSE("GPL");
827 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
828 MODULE_PARM_DESC(debug
, "Enable verbose debugging messages");