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_change_speed(struct tty_struct
*, struct usb_serial_port
*,
44 static void cp210x_set_termios(struct tty_struct
*, struct usb_serial_port
*,
46 static int cp210x_tiocmget(struct tty_struct
*);
47 static int cp210x_tiocmset(struct tty_struct
*, unsigned int, unsigned int);
48 static int cp210x_tiocmset_port(struct usb_serial_port
*port
,
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_release(struct usb_serial
*);
53 static void cp210x_dtr_rts(struct usb_serial_port
*p
, int on
);
57 static const struct usb_device_id id_table
[] = {
58 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
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(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
62 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
63 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
64 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
65 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
66 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
67 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
68 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
69 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
70 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
71 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
72 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
73 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
74 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
75 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
76 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
77 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
78 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
79 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
80 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
81 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
82 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
83 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
84 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
85 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
86 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
87 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
88 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
89 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
90 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
91 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
92 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
93 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
94 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
95 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
96 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
97 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
98 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
99 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
100 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
101 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
102 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
103 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
104 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
105 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
106 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
107 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
108 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
109 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
110 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
111 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
112 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
113 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
114 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
115 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
116 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
117 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
118 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
119 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
120 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
121 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
122 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
123 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
124 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
125 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
126 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
127 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
128 { USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */
129 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
130 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
131 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
132 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
133 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
134 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
135 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
136 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
137 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
138 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
139 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
140 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
141 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
142 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
143 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
144 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
145 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
146 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
147 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
148 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
149 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
150 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
151 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
152 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
153 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
154 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
155 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
156 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
157 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
158 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
159 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
160 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
161 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
162 { } /* Terminating Entry */
165 MODULE_DEVICE_TABLE(usb
, id_table
);
167 struct cp210x_port_private
{
168 __u8 bInterfaceNumber
;
171 static struct usb_serial_driver cp210x_device
= {
173 .owner
= THIS_MODULE
,
176 .id_table
= id_table
,
179 .bulk_out_size
= 256,
181 .close
= cp210x_close
,
182 .break_ctl
= cp210x_break_ctl
,
183 .set_termios
= cp210x_set_termios
,
184 .tiocmget
= cp210x_tiocmget
,
185 .tiocmset
= cp210x_tiocmset
,
186 .attach
= cp210x_startup
,
187 .release
= cp210x_release
,
188 .dtr_rts
= cp210x_dtr_rts
191 static struct usb_serial_driver
* const serial_drivers
[] = {
195 /* Config request types */
196 #define REQTYPE_HOST_TO_INTERFACE 0x41
197 #define REQTYPE_INTERFACE_TO_HOST 0xc1
198 #define REQTYPE_HOST_TO_DEVICE 0x40
199 #define REQTYPE_DEVICE_TO_HOST 0xc0
201 /* Config request codes */
202 #define CP210X_IFC_ENABLE 0x00
203 #define CP210X_SET_BAUDDIV 0x01
204 #define CP210X_GET_BAUDDIV 0x02
205 #define CP210X_SET_LINE_CTL 0x03
206 #define CP210X_GET_LINE_CTL 0x04
207 #define CP210X_SET_BREAK 0x05
208 #define CP210X_IMM_CHAR 0x06
209 #define CP210X_SET_MHS 0x07
210 #define CP210X_GET_MDMSTS 0x08
211 #define CP210X_SET_XON 0x09
212 #define CP210X_SET_XOFF 0x0A
213 #define CP210X_SET_EVENTMASK 0x0B
214 #define CP210X_GET_EVENTMASK 0x0C
215 #define CP210X_SET_CHAR 0x0D
216 #define CP210X_GET_CHARS 0x0E
217 #define CP210X_GET_PROPS 0x0F
218 #define CP210X_GET_COMM_STATUS 0x10
219 #define CP210X_RESET 0x11
220 #define CP210X_PURGE 0x12
221 #define CP210X_SET_FLOW 0x13
222 #define CP210X_GET_FLOW 0x14
223 #define CP210X_EMBED_EVENTS 0x15
224 #define CP210X_GET_EVENTSTATE 0x16
225 #define CP210X_SET_CHARS 0x19
226 #define CP210X_GET_BAUDRATE 0x1D
227 #define CP210X_SET_BAUDRATE 0x1E
229 /* CP210X_IFC_ENABLE */
230 #define UART_ENABLE 0x0001
231 #define UART_DISABLE 0x0000
233 /* CP210X_(SET|GET)_BAUDDIV */
234 #define BAUD_RATE_GEN_FREQ 0x384000
236 /* CP210X_(SET|GET)_LINE_CTL */
237 #define BITS_DATA_MASK 0X0f00
238 #define BITS_DATA_5 0X0500
239 #define BITS_DATA_6 0X0600
240 #define BITS_DATA_7 0X0700
241 #define BITS_DATA_8 0X0800
242 #define BITS_DATA_9 0X0900
244 #define BITS_PARITY_MASK 0x00f0
245 #define BITS_PARITY_NONE 0x0000
246 #define BITS_PARITY_ODD 0x0010
247 #define BITS_PARITY_EVEN 0x0020
248 #define BITS_PARITY_MARK 0x0030
249 #define BITS_PARITY_SPACE 0x0040
251 #define BITS_STOP_MASK 0x000f
252 #define BITS_STOP_1 0x0000
253 #define BITS_STOP_1_5 0x0001
254 #define BITS_STOP_2 0x0002
256 /* CP210X_SET_BREAK */
257 #define BREAK_ON 0x0001
258 #define BREAK_OFF 0x0000
260 /* CP210X_(SET_MHS|GET_MDMSTS) */
261 #define CONTROL_DTR 0x0001
262 #define CONTROL_RTS 0x0002
263 #define CONTROL_CTS 0x0010
264 #define CONTROL_DSR 0x0020
265 #define CONTROL_RING 0x0040
266 #define CONTROL_DCD 0x0080
267 #define CONTROL_WRITE_DTR 0x0100
268 #define CONTROL_WRITE_RTS 0x0200
272 * Reads from the CP210x configuration registers
273 * 'size' is specified in bytes.
274 * 'data' is a pointer to a pre-allocated array of integers large
275 * enough to hold 'size' bytes (with 4 bytes to each integer)
277 static int cp210x_get_config(struct usb_serial_port
*port
, u8 request
,
278 unsigned int *data
, int size
)
280 struct usb_serial
*serial
= port
->serial
;
281 struct cp210x_port_private
*port_priv
= usb_get_serial_port_data(port
);
283 int result
, i
, length
;
285 /* Number of integers required to contain the array */
286 length
= (((size
- 1) | 3) + 1)/4;
288 buf
= kcalloc(length
, sizeof(__le32
), GFP_KERNEL
);
290 dev_err(&port
->dev
, "%s - out of memory.\n", __func__
);
294 /* Issue the request, attempting to read 'size' bytes */
295 result
= usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
296 request
, REQTYPE_INTERFACE_TO_HOST
, 0x0000,
297 port_priv
->bInterfaceNumber
, buf
, size
,
298 USB_CTRL_GET_TIMEOUT
);
300 /* Convert data into an array of integers */
301 for (i
= 0; i
< length
; i
++)
302 data
[i
] = le32_to_cpu(buf
[i
]);
306 if (result
!= size
) {
307 dbg("%s - Unable to send config request, "
308 "request=0x%x size=%d result=%d",
309 __func__
, request
, size
, result
);
321 * Writes to the CP210x configuration registers
322 * Values less than 16 bits wide are sent directly
323 * 'size' is specified in bytes.
325 static int cp210x_set_config(struct usb_serial_port
*port
, u8 request
,
326 unsigned int *data
, int size
)
328 struct usb_serial
*serial
= port
->serial
;
329 struct cp210x_port_private
*port_priv
= usb_get_serial_port_data(port
);
331 int result
, i
, length
;
333 /* Number of integers required to contain the array */
334 length
= (((size
- 1) | 3) + 1)/4;
336 buf
= kmalloc(length
* sizeof(__le32
), GFP_KERNEL
);
338 dev_err(&port
->dev
, "%s - out of memory.\n",
343 /* Array of integers into bytes */
344 for (i
= 0; i
< length
; i
++)
345 buf
[i
] = cpu_to_le32(data
[i
]);
348 result
= usb_control_msg(serial
->dev
,
349 usb_sndctrlpipe(serial
->dev
, 0),
350 request
, REQTYPE_HOST_TO_INTERFACE
, 0x0000,
351 port_priv
->bInterfaceNumber
, buf
, size
,
352 USB_CTRL_SET_TIMEOUT
);
354 result
= usb_control_msg(serial
->dev
,
355 usb_sndctrlpipe(serial
->dev
, 0),
356 request
, REQTYPE_HOST_TO_INTERFACE
, data
[0],
357 port_priv
->bInterfaceNumber
, NULL
, 0,
358 USB_CTRL_SET_TIMEOUT
);
363 if ((size
> 2 && result
!= size
) || result
< 0) {
364 dbg("%s - Unable to send request, "
365 "request=0x%x size=%d result=%d",
366 __func__
, request
, size
, result
);
377 * cp210x_set_config_single
378 * Convenience function for calling cp210x_set_config on single data values
379 * without requiring an integer pointer
381 static inline int cp210x_set_config_single(struct usb_serial_port
*port
,
382 u8 request
, unsigned int data
)
384 return cp210x_set_config(port
, request
, &data
, 2);
388 * cp210x_quantise_baudrate
389 * Quantises the baud rate as per AN205 Table 1
391 static unsigned int cp210x_quantise_baudrate(unsigned int baud
) {
394 else if (baud
<= 600) baud
= 600;
395 else if (baud
<= 1200) baud
= 1200;
396 else if (baud
<= 1800) baud
= 1800;
397 else if (baud
<= 2400) baud
= 2400;
398 else if (baud
<= 4000) baud
= 4000;
399 else if (baud
<= 4803) baud
= 4800;
400 else if (baud
<= 7207) baud
= 7200;
401 else if (baud
<= 9612) baud
= 9600;
402 else if (baud
<= 14428) baud
= 14400;
403 else if (baud
<= 16062) baud
= 16000;
404 else if (baud
<= 19250) baud
= 19200;
405 else if (baud
<= 28912) baud
= 28800;
406 else if (baud
<= 38601) baud
= 38400;
407 else if (baud
<= 51558) baud
= 51200;
408 else if (baud
<= 56280) baud
= 56000;
409 else if (baud
<= 58053) baud
= 57600;
410 else if (baud
<= 64111) baud
= 64000;
411 else if (baud
<= 77608) baud
= 76800;
412 else if (baud
<= 117028) baud
= 115200;
413 else if (baud
<= 129347) baud
= 128000;
414 else if (baud
<= 156868) baud
= 153600;
415 else if (baud
<= 237832) baud
= 230400;
416 else if (baud
<= 254234) baud
= 250000;
417 else if (baud
<= 273066) baud
= 256000;
418 else if (baud
<= 491520) baud
= 460800;
419 else if (baud
<= 567138) baud
= 500000;
420 else if (baud
<= 670254) baud
= 576000;
421 else if (baud
< 1000000)
423 else if (baud
> 2000000)
428 static int cp210x_open(struct tty_struct
*tty
, struct usb_serial_port
*port
)
432 result
= cp210x_set_config_single(port
, CP210X_IFC_ENABLE
,
435 dev_err(&port
->dev
, "%s - Unable to enable UART\n", __func__
);
439 /* Configure the termios structure */
440 cp210x_get_termios(tty
, port
);
442 /* The baud rate must be initialised on cp2104 */
444 cp210x_change_speed(tty
, port
, NULL
);
446 return usb_serial_generic_open(tty
, port
);
449 static void cp210x_close(struct usb_serial_port
*port
)
451 usb_serial_generic_close(port
);
453 mutex_lock(&port
->serial
->disc_mutex
);
454 if (!port
->serial
->disconnected
)
455 cp210x_set_config_single(port
, CP210X_IFC_ENABLE
, UART_DISABLE
);
456 mutex_unlock(&port
->serial
->disc_mutex
);
461 * Reads the baud rate, data bits, parity, stop bits and flow control mode
462 * from the device, corrects any unsupported values, and configures the
463 * termios structure to reflect the state of the device
465 static void cp210x_get_termios(struct tty_struct
*tty
,
466 struct usb_serial_port
*port
)
471 cp210x_get_termios_port(tty
->driver_data
,
472 &tty
->termios
->c_cflag
, &baud
);
473 tty_encode_baud_rate(tty
, baud
, baud
);
479 cp210x_get_termios_port(port
, &cflag
, &baud
);
484 * cp210x_get_termios_port
485 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
487 static void cp210x_get_termios_port(struct usb_serial_port
*port
,
488 unsigned int *cflagp
, unsigned int *baudp
)
490 unsigned int cflag
, modem_ctl
[4];
494 cp210x_get_config(port
, CP210X_GET_BAUDRATE
, &baud
, 4);
496 dbg("%s - baud rate = %d", __func__
, baud
);
501 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
503 switch (bits
& BITS_DATA_MASK
) {
505 dbg("%s - data bits = 5", __func__
);
509 dbg("%s - data bits = 6", __func__
);
513 dbg("%s - data bits = 7", __func__
);
517 dbg("%s - data bits = 8", __func__
);
521 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
524 bits
&= ~BITS_DATA_MASK
;
526 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
529 dbg("%s - Unknown number of data bits, using 8", __func__
);
531 bits
&= ~BITS_DATA_MASK
;
533 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
537 switch (bits
& BITS_PARITY_MASK
) {
538 case BITS_PARITY_NONE
:
539 dbg("%s - parity = NONE", __func__
);
542 case BITS_PARITY_ODD
:
543 dbg("%s - parity = ODD", __func__
);
544 cflag
|= (PARENB
|PARODD
);
546 case BITS_PARITY_EVEN
:
547 dbg("%s - parity = EVEN", __func__
);
551 case BITS_PARITY_MARK
:
552 dbg("%s - parity = MARK", __func__
);
553 cflag
|= (PARENB
|PARODD
|CMSPAR
);
555 case BITS_PARITY_SPACE
:
556 dbg("%s - parity = SPACE", __func__
);
558 cflag
|= (PARENB
|CMSPAR
);
561 dbg("%s - Unknown parity mode, disabling parity", __func__
);
563 bits
&= ~BITS_PARITY_MASK
;
564 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
569 switch (bits
& BITS_STOP_MASK
) {
571 dbg("%s - stop bits = 1", __func__
);
574 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
576 bits
&= ~BITS_STOP_MASK
;
577 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
580 dbg("%s - stop bits = 2", __func__
);
584 dbg("%s - Unknown number of stop bits, using 1 stop bit",
586 bits
&= ~BITS_STOP_MASK
;
587 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
591 cp210x_get_config(port
, CP210X_GET_FLOW
, modem_ctl
, 16);
592 if (modem_ctl
[0] & 0x0008) {
593 dbg("%s - flow control = CRTSCTS", __func__
);
596 dbg("%s - flow control = NONE", __func__
);
604 * CP2101 supports the following baud rates:
606 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
607 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
609 * CP2102 and CP2103 support the following additional rates:
611 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
614 * The device will map a requested rate to a supported one, but the result
615 * of requests for rates greater than 1053257 is undefined (see AN205).
617 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
618 * respectively, with an error less than 1%. The actual rates are determined
621 * div = round(freq / (2 x prescale x request))
622 * actual = freq / (2 x prescale x div)
624 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
626 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
629 static void cp210x_change_speed(struct tty_struct
*tty
,
630 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
634 baud
= tty
->termios
->c_ospeed
;
636 /* This maps the requested rate to a rate valid on cp2102 or cp2103,
637 * or to an arbitrary rate in [1M,2M].
639 * NOTE: B0 is not implemented.
641 baud
= cp210x_quantise_baudrate(baud
);
643 dbg("%s - setting baud rate to %u", __func__
, baud
);
644 if (cp210x_set_config(port
, CP210X_SET_BAUDRATE
, &baud
,
646 dev_warn(&port
->dev
, "failed to set baud rate to %u\n", baud
);
648 baud
= old_termios
->c_ospeed
;
653 tty_encode_baud_rate(tty
, baud
, baud
);
656 static void cp210x_set_termios(struct tty_struct
*tty
,
657 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
659 unsigned int cflag
, old_cflag
;
661 unsigned int modem_ctl
[4];
663 dbg("%s - port %d", __func__
, port
->number
);
668 cflag
= tty
->termios
->c_cflag
;
669 old_cflag
= old_termios
->c_cflag
;
671 if (tty
->termios
->c_ospeed
!= old_termios
->c_ospeed
)
672 cp210x_change_speed(tty
, port
, old_termios
);
674 /* If the number of data bits is to be updated */
675 if ((cflag
& CSIZE
) != (old_cflag
& CSIZE
)) {
676 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
677 bits
&= ~BITS_DATA_MASK
;
678 switch (cflag
& CSIZE
) {
681 dbg("%s - data bits = 5", __func__
);
685 dbg("%s - data bits = 6", __func__
);
689 dbg("%s - data bits = 7", __func__
);
693 dbg("%s - data bits = 8", __func__
);
697 dbg("%s - data bits = 9", __func__);
700 dbg("cp210x driver does not "
701 "support the number of bits requested,"
702 " using 8 bit mode");
706 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
707 dbg("Number of data bits requested "
708 "not supported by device");
711 if ((cflag
& (PARENB
|PARODD
|CMSPAR
)) !=
712 (old_cflag
& (PARENB
|PARODD
|CMSPAR
))) {
713 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
714 bits
&= ~BITS_PARITY_MASK
;
715 if (cflag
& PARENB
) {
716 if (cflag
& CMSPAR
) {
717 if (cflag
& PARODD
) {
718 bits
|= BITS_PARITY_MARK
;
719 dbg("%s - parity = MARK", __func__
);
721 bits
|= BITS_PARITY_SPACE
;
722 dbg("%s - parity = SPACE", __func__
);
725 if (cflag
& PARODD
) {
726 bits
|= BITS_PARITY_ODD
;
727 dbg("%s - parity = ODD", __func__
);
729 bits
|= BITS_PARITY_EVEN
;
730 dbg("%s - parity = EVEN", __func__
);
734 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
735 dbg("Parity mode not supported by device");
738 if ((cflag
& CSTOPB
) != (old_cflag
& CSTOPB
)) {
739 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
740 bits
&= ~BITS_STOP_MASK
;
741 if (cflag
& CSTOPB
) {
743 dbg("%s - stop bits = 2", __func__
);
746 dbg("%s - stop bits = 1", __func__
);
748 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
749 dbg("Number of stop bits requested "
750 "not supported by device");
753 if ((cflag
& CRTSCTS
) != (old_cflag
& CRTSCTS
)) {
754 cp210x_get_config(port
, CP210X_GET_FLOW
, modem_ctl
, 16);
755 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
756 __func__
, modem_ctl
[0], modem_ctl
[1],
757 modem_ctl
[2], modem_ctl
[3]);
759 if (cflag
& CRTSCTS
) {
760 modem_ctl
[0] &= ~0x7B;
761 modem_ctl
[0] |= 0x09;
763 dbg("%s - flow control = CRTSCTS", __func__
);
765 modem_ctl
[0] &= ~0x7B;
766 modem_ctl
[0] |= 0x01;
767 modem_ctl
[1] |= 0x40;
768 dbg("%s - flow control = NONE", __func__
);
771 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
772 __func__
, modem_ctl
[0], modem_ctl
[1],
773 modem_ctl
[2], modem_ctl
[3]);
774 cp210x_set_config(port
, CP210X_SET_FLOW
, modem_ctl
, 16);
779 static int cp210x_tiocmset (struct tty_struct
*tty
,
780 unsigned int set
, unsigned int clear
)
782 struct usb_serial_port
*port
= tty
->driver_data
;
783 return cp210x_tiocmset_port(port
, set
, clear
);
786 static int cp210x_tiocmset_port(struct usb_serial_port
*port
,
787 unsigned int set
, unsigned int clear
)
789 unsigned int control
= 0;
791 if (set
& TIOCM_RTS
) {
792 control
|= CONTROL_RTS
;
793 control
|= CONTROL_WRITE_RTS
;
795 if (set
& TIOCM_DTR
) {
796 control
|= CONTROL_DTR
;
797 control
|= CONTROL_WRITE_DTR
;
799 if (clear
& TIOCM_RTS
) {
800 control
&= ~CONTROL_RTS
;
801 control
|= CONTROL_WRITE_RTS
;
803 if (clear
& TIOCM_DTR
) {
804 control
&= ~CONTROL_DTR
;
805 control
|= CONTROL_WRITE_DTR
;
808 dbg("%s - control = 0x%.4x", __func__
, control
);
810 return cp210x_set_config(port
, CP210X_SET_MHS
, &control
, 2);
813 static void cp210x_dtr_rts(struct usb_serial_port
*p
, int on
)
816 cp210x_tiocmset_port(p
, TIOCM_DTR
|TIOCM_RTS
, 0);
818 cp210x_tiocmset_port(p
, 0, TIOCM_DTR
|TIOCM_RTS
);
821 static int cp210x_tiocmget (struct tty_struct
*tty
)
823 struct usb_serial_port
*port
= tty
->driver_data
;
824 unsigned int control
;
827 cp210x_get_config(port
, CP210X_GET_MDMSTS
, &control
, 1);
829 result
= ((control
& CONTROL_DTR
) ? TIOCM_DTR
: 0)
830 |((control
& CONTROL_RTS
) ? TIOCM_RTS
: 0)
831 |((control
& CONTROL_CTS
) ? TIOCM_CTS
: 0)
832 |((control
& CONTROL_DSR
) ? TIOCM_DSR
: 0)
833 |((control
& CONTROL_RING
)? TIOCM_RI
: 0)
834 |((control
& CONTROL_DCD
) ? TIOCM_CD
: 0);
836 dbg("%s - control = 0x%.2x", __func__
, control
);
841 static void cp210x_break_ctl (struct tty_struct
*tty
, int break_state
)
843 struct usb_serial_port
*port
= tty
->driver_data
;
846 if (break_state
== 0)
850 dbg("%s - turning break %s", __func__
,
851 state
== BREAK_OFF
? "off" : "on");
852 cp210x_set_config(port
, CP210X_SET_BREAK
, &state
, 2);
855 static int cp210x_startup(struct usb_serial
*serial
)
857 struct cp210x_port_private
*port_priv
;
860 /* cp210x buffers behave strangely unless device is reset */
861 usb_reset_device(serial
->dev
);
863 for (i
= 0; i
< serial
->num_ports
; i
++) {
864 port_priv
= kzalloc(sizeof(*port_priv
), GFP_KERNEL
);
868 memset(port_priv
, 0x00, sizeof(*port_priv
));
869 port_priv
->bInterfaceNumber
=
870 serial
->interface
->cur_altsetting
->desc
.bInterfaceNumber
;
872 usb_set_serial_port_data(serial
->port
[i
], port_priv
);
878 static void cp210x_release(struct usb_serial
*serial
)
880 struct cp210x_port_private
*port_priv
;
883 for (i
= 0; i
< serial
->num_ports
; i
++) {
884 port_priv
= usb_get_serial_port_data(serial
->port
[i
]);
886 usb_set_serial_port_data(serial
->port
[i
], NULL
);
890 module_usb_serial_driver(serial_drivers
, id_table
);
892 MODULE_DESCRIPTION(DRIVER_DESC
);
893 MODULE_VERSION(DRIVER_VERSION
);
894 MODULE_LICENSE("GPL");
896 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
897 MODULE_PARM_DESC(debug
, "Enable verbose debugging messages");