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>
27 #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
32 static int cp210x_open(struct tty_struct
*tty
, struct usb_serial_port
*);
33 static void cp210x_close(struct usb_serial_port
*);
34 static void cp210x_get_termios(struct tty_struct
*, struct usb_serial_port
*);
35 static void cp210x_get_termios_port(struct usb_serial_port
*port
,
36 unsigned int *cflagp
, unsigned int *baudp
);
37 static void cp210x_change_speed(struct tty_struct
*, struct usb_serial_port
*,
39 static void cp210x_set_termios(struct tty_struct
*, struct usb_serial_port
*,
41 static int cp210x_tiocmget(struct tty_struct
*);
42 static int cp210x_tiocmset(struct tty_struct
*, unsigned int, unsigned int);
43 static int cp210x_tiocmset_port(struct usb_serial_port
*port
,
44 unsigned int, unsigned int);
45 static void cp210x_break_ctl(struct tty_struct
*, int);
46 static int cp210x_startup(struct usb_serial
*);
47 static void cp210x_release(struct usb_serial
*);
48 static void cp210x_dtr_rts(struct usb_serial_port
*p
, int on
);
50 static const struct usb_device_id id_table
[] = {
51 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
52 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
53 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
54 { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
55 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
56 { USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */
57 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
58 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
59 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
60 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
61 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
62 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
63 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
64 { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
65 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
66 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
67 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
68 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
69 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
70 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
71 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
72 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
73 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
74 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in 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, 0x806F) }, /* IMS USB to RS422 Converter Cable */
79 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
80 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
81 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
82 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
83 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
84 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
85 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
86 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
87 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
88 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
89 { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */
90 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
91 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
92 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
93 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
94 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
95 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
96 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
97 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
98 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
99 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
100 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
101 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
102 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
103 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
104 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
105 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
106 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
107 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
108 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
109 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
110 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
111 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
112 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
113 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
114 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
115 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
116 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
117 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
118 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
119 { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
120 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
121 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
122 { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
123 { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
124 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
125 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
126 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
127 { USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */
128 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
129 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
130 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
131 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
132 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
133 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
134 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
135 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
136 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
137 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
138 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
139 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
140 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
141 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
142 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
143 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
144 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
145 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
146 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
147 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
148 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
149 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
150 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
151 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
152 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
153 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
154 { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
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(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */
159 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */
160 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */
161 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */
162 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */
163 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */
164 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */
165 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */
166 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */
167 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */
168 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */
169 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */
170 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */
171 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */
172 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */
173 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */
174 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
175 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */
176 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */
177 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
178 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
179 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
180 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
181 { } /* Terminating Entry */
184 MODULE_DEVICE_TABLE(usb
, id_table
);
186 struct cp210x_serial_private
{
187 __u8 bInterfaceNumber
;
190 static struct usb_serial_driver cp210x_device
= {
192 .owner
= THIS_MODULE
,
195 .id_table
= id_table
,
198 .bulk_out_size
= 256,
200 .close
= cp210x_close
,
201 .break_ctl
= cp210x_break_ctl
,
202 .set_termios
= cp210x_set_termios
,
203 .tiocmget
= cp210x_tiocmget
,
204 .tiocmset
= cp210x_tiocmset
,
205 .attach
= cp210x_startup
,
206 .release
= cp210x_release
,
207 .dtr_rts
= cp210x_dtr_rts
210 static struct usb_serial_driver
* const serial_drivers
[] = {
214 /* Config request types */
215 #define REQTYPE_HOST_TO_INTERFACE 0x41
216 #define REQTYPE_INTERFACE_TO_HOST 0xc1
217 #define REQTYPE_HOST_TO_DEVICE 0x40
218 #define REQTYPE_DEVICE_TO_HOST 0xc0
220 /* Config request codes */
221 #define CP210X_IFC_ENABLE 0x00
222 #define CP210X_SET_BAUDDIV 0x01
223 #define CP210X_GET_BAUDDIV 0x02
224 #define CP210X_SET_LINE_CTL 0x03
225 #define CP210X_GET_LINE_CTL 0x04
226 #define CP210X_SET_BREAK 0x05
227 #define CP210X_IMM_CHAR 0x06
228 #define CP210X_SET_MHS 0x07
229 #define CP210X_GET_MDMSTS 0x08
230 #define CP210X_SET_XON 0x09
231 #define CP210X_SET_XOFF 0x0A
232 #define CP210X_SET_EVENTMASK 0x0B
233 #define CP210X_GET_EVENTMASK 0x0C
234 #define CP210X_SET_CHAR 0x0D
235 #define CP210X_GET_CHARS 0x0E
236 #define CP210X_GET_PROPS 0x0F
237 #define CP210X_GET_COMM_STATUS 0x10
238 #define CP210X_RESET 0x11
239 #define CP210X_PURGE 0x12
240 #define CP210X_SET_FLOW 0x13
241 #define CP210X_GET_FLOW 0x14
242 #define CP210X_EMBED_EVENTS 0x15
243 #define CP210X_GET_EVENTSTATE 0x16
244 #define CP210X_SET_CHARS 0x19
245 #define CP210X_GET_BAUDRATE 0x1D
246 #define CP210X_SET_BAUDRATE 0x1E
248 /* CP210X_IFC_ENABLE */
249 #define UART_ENABLE 0x0001
250 #define UART_DISABLE 0x0000
252 /* CP210X_(SET|GET)_BAUDDIV */
253 #define BAUD_RATE_GEN_FREQ 0x384000
255 /* CP210X_(SET|GET)_LINE_CTL */
256 #define BITS_DATA_MASK 0X0f00
257 #define BITS_DATA_5 0X0500
258 #define BITS_DATA_6 0X0600
259 #define BITS_DATA_7 0X0700
260 #define BITS_DATA_8 0X0800
261 #define BITS_DATA_9 0X0900
263 #define BITS_PARITY_MASK 0x00f0
264 #define BITS_PARITY_NONE 0x0000
265 #define BITS_PARITY_ODD 0x0010
266 #define BITS_PARITY_EVEN 0x0020
267 #define BITS_PARITY_MARK 0x0030
268 #define BITS_PARITY_SPACE 0x0040
270 #define BITS_STOP_MASK 0x000f
271 #define BITS_STOP_1 0x0000
272 #define BITS_STOP_1_5 0x0001
273 #define BITS_STOP_2 0x0002
275 /* CP210X_SET_BREAK */
276 #define BREAK_ON 0x0001
277 #define BREAK_OFF 0x0000
279 /* CP210X_(SET_MHS|GET_MDMSTS) */
280 #define CONTROL_DTR 0x0001
281 #define CONTROL_RTS 0x0002
282 #define CONTROL_CTS 0x0010
283 #define CONTROL_DSR 0x0020
284 #define CONTROL_RING 0x0040
285 #define CONTROL_DCD 0x0080
286 #define CONTROL_WRITE_DTR 0x0100
287 #define CONTROL_WRITE_RTS 0x0200
291 * Reads from the CP210x configuration registers
292 * 'size' is specified in bytes.
293 * 'data' is a pointer to a pre-allocated array of integers large
294 * enough to hold 'size' bytes (with 4 bytes to each integer)
296 static int cp210x_get_config(struct usb_serial_port
*port
, u8 request
,
297 unsigned int *data
, int size
)
299 struct usb_serial
*serial
= port
->serial
;
300 struct cp210x_serial_private
*spriv
= usb_get_serial_data(serial
);
302 int result
, i
, length
;
304 /* Number of integers required to contain the array */
305 length
= (((size
- 1) | 3) + 1) / 4;
307 buf
= kcalloc(length
, sizeof(__le32
), GFP_KERNEL
);
309 dev_err(&port
->dev
, "%s - out of memory.\n", __func__
);
313 /* Issue the request, attempting to read 'size' bytes */
314 result
= usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
315 request
, REQTYPE_INTERFACE_TO_HOST
, 0x0000,
316 spriv
->bInterfaceNumber
, buf
, size
,
317 USB_CTRL_GET_TIMEOUT
);
319 /* Convert data into an array of integers */
320 for (i
= 0; i
< length
; i
++)
321 data
[i
] = le32_to_cpu(buf
[i
]);
325 if (result
!= size
) {
326 dev_dbg(&port
->dev
, "%s - Unable to send config request, request=0x%x size=%d result=%d\n",
327 __func__
, request
, size
, result
);
339 * Writes to the CP210x configuration registers
340 * Values less than 16 bits wide are sent directly
341 * 'size' is specified in bytes.
343 static int cp210x_set_config(struct usb_serial_port
*port
, u8 request
,
344 unsigned int *data
, int size
)
346 struct usb_serial
*serial
= port
->serial
;
347 struct cp210x_serial_private
*spriv
= usb_get_serial_data(serial
);
349 int result
, i
, length
;
351 /* Number of integers required to contain the array */
352 length
= (((size
- 1) | 3) + 1) / 4;
354 buf
= kmalloc(length
* sizeof(__le32
), GFP_KERNEL
);
356 dev_err(&port
->dev
, "%s - out of memory.\n", __func__
);
360 /* Array of integers into bytes */
361 for (i
= 0; i
< length
; i
++)
362 buf
[i
] = cpu_to_le32(data
[i
]);
365 result
= usb_control_msg(serial
->dev
,
366 usb_sndctrlpipe(serial
->dev
, 0),
367 request
, REQTYPE_HOST_TO_INTERFACE
, 0x0000,
368 spriv
->bInterfaceNumber
, buf
, size
,
369 USB_CTRL_SET_TIMEOUT
);
371 result
= usb_control_msg(serial
->dev
,
372 usb_sndctrlpipe(serial
->dev
, 0),
373 request
, REQTYPE_HOST_TO_INTERFACE
, data
[0],
374 spriv
->bInterfaceNumber
, NULL
, 0,
375 USB_CTRL_SET_TIMEOUT
);
380 if ((size
> 2 && result
!= size
) || result
< 0) {
381 dev_dbg(&port
->dev
, "%s - Unable to send request, request=0x%x size=%d result=%d\n",
382 __func__
, request
, size
, result
);
393 * cp210x_set_config_single
394 * Convenience function for calling cp210x_set_config on single data values
395 * without requiring an integer pointer
397 static inline int cp210x_set_config_single(struct usb_serial_port
*port
,
398 u8 request
, unsigned int data
)
400 return cp210x_set_config(port
, request
, &data
, 2);
404 * cp210x_quantise_baudrate
405 * Quantises the baud rate as per AN205 Table 1
407 static unsigned int cp210x_quantise_baudrate(unsigned int baud
)
411 else if (baud
<= 600) baud
= 600;
412 else if (baud
<= 1200) baud
= 1200;
413 else if (baud
<= 1800) baud
= 1800;
414 else if (baud
<= 2400) baud
= 2400;
415 else if (baud
<= 4000) baud
= 4000;
416 else if (baud
<= 4803) baud
= 4800;
417 else if (baud
<= 7207) baud
= 7200;
418 else if (baud
<= 9612) baud
= 9600;
419 else if (baud
<= 14428) baud
= 14400;
420 else if (baud
<= 16062) baud
= 16000;
421 else if (baud
<= 19250) baud
= 19200;
422 else if (baud
<= 28912) baud
= 28800;
423 else if (baud
<= 38601) baud
= 38400;
424 else if (baud
<= 51558) baud
= 51200;
425 else if (baud
<= 56280) baud
= 56000;
426 else if (baud
<= 58053) baud
= 57600;
427 else if (baud
<= 64111) baud
= 64000;
428 else if (baud
<= 77608) baud
= 76800;
429 else if (baud
<= 117028) baud
= 115200;
430 else if (baud
<= 129347) baud
= 128000;
431 else if (baud
<= 156868) baud
= 153600;
432 else if (baud
<= 237832) baud
= 230400;
433 else if (baud
<= 254234) baud
= 250000;
434 else if (baud
<= 273066) baud
= 256000;
435 else if (baud
<= 491520) baud
= 460800;
436 else if (baud
<= 567138) baud
= 500000;
437 else if (baud
<= 670254) baud
= 576000;
438 else if (baud
< 1000000)
440 else if (baud
> 2000000)
445 static int cp210x_open(struct tty_struct
*tty
, struct usb_serial_port
*port
)
449 result
= cp210x_set_config_single(port
, CP210X_IFC_ENABLE
,
452 dev_err(&port
->dev
, "%s - Unable to enable UART\n", __func__
);
456 /* Configure the termios structure */
457 cp210x_get_termios(tty
, port
);
459 /* The baud rate must be initialised on cp2104 */
461 cp210x_change_speed(tty
, port
, NULL
);
463 return usb_serial_generic_open(tty
, port
);
466 static void cp210x_close(struct usb_serial_port
*port
)
468 usb_serial_generic_close(port
);
469 cp210x_set_config_single(port
, CP210X_IFC_ENABLE
, UART_DISABLE
);
474 * Reads the baud rate, data bits, parity, stop bits and flow control mode
475 * from the device, corrects any unsupported values, and configures the
476 * termios structure to reflect the state of the device
478 static void cp210x_get_termios(struct tty_struct
*tty
,
479 struct usb_serial_port
*port
)
484 cp210x_get_termios_port(tty
->driver_data
,
485 &tty
->termios
.c_cflag
, &baud
);
486 tty_encode_baud_rate(tty
, baud
, baud
);
490 cp210x_get_termios_port(port
, &cflag
, &baud
);
495 * cp210x_get_termios_port
496 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
498 static void cp210x_get_termios_port(struct usb_serial_port
*port
,
499 unsigned int *cflagp
, unsigned int *baudp
)
501 struct device
*dev
= &port
->dev
;
502 unsigned int cflag
, modem_ctl
[4];
506 cp210x_get_config(port
, CP210X_GET_BAUDRATE
, &baud
, 4);
508 dev_dbg(dev
, "%s - baud rate = %d\n", __func__
, baud
);
513 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
515 switch (bits
& BITS_DATA_MASK
) {
517 dev_dbg(dev
, "%s - data bits = 5\n", __func__
);
521 dev_dbg(dev
, "%s - data bits = 6\n", __func__
);
525 dev_dbg(dev
, "%s - data bits = 7\n", __func__
);
529 dev_dbg(dev
, "%s - data bits = 8\n", __func__
);
533 dev_dbg(dev
, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__
);
535 bits
&= ~BITS_DATA_MASK
;
537 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
540 dev_dbg(dev
, "%s - Unknown number of data bits, using 8\n", __func__
);
542 bits
&= ~BITS_DATA_MASK
;
544 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
548 switch (bits
& BITS_PARITY_MASK
) {
549 case BITS_PARITY_NONE
:
550 dev_dbg(dev
, "%s - parity = NONE\n", __func__
);
553 case BITS_PARITY_ODD
:
554 dev_dbg(dev
, "%s - parity = ODD\n", __func__
);
555 cflag
|= (PARENB
|PARODD
);
557 case BITS_PARITY_EVEN
:
558 dev_dbg(dev
, "%s - parity = EVEN\n", __func__
);
562 case BITS_PARITY_MARK
:
563 dev_dbg(dev
, "%s - parity = MARK\n", __func__
);
564 cflag
|= (PARENB
|PARODD
|CMSPAR
);
566 case BITS_PARITY_SPACE
:
567 dev_dbg(dev
, "%s - parity = SPACE\n", __func__
);
569 cflag
|= (PARENB
|CMSPAR
);
572 dev_dbg(dev
, "%s - Unknown parity mode, disabling parity\n", __func__
);
574 bits
&= ~BITS_PARITY_MASK
;
575 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
580 switch (bits
& BITS_STOP_MASK
) {
582 dev_dbg(dev
, "%s - stop bits = 1\n", __func__
);
585 dev_dbg(dev
, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__
);
586 bits
&= ~BITS_STOP_MASK
;
587 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
590 dev_dbg(dev
, "%s - stop bits = 2\n", __func__
);
594 dev_dbg(dev
, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__
);
595 bits
&= ~BITS_STOP_MASK
;
596 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
600 cp210x_get_config(port
, CP210X_GET_FLOW
, modem_ctl
, 16);
601 if (modem_ctl
[0] & 0x0008) {
602 dev_dbg(dev
, "%s - flow control = CRTSCTS\n", __func__
);
605 dev_dbg(dev
, "%s - flow control = NONE\n", __func__
);
613 * CP2101 supports the following baud rates:
615 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
616 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
618 * CP2102 and CP2103 support the following additional rates:
620 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
623 * The device will map a requested rate to a supported one, but the result
624 * of requests for rates greater than 1053257 is undefined (see AN205).
626 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
627 * respectively, with an error less than 1%. The actual rates are determined
630 * div = round(freq / (2 x prescale x request))
631 * actual = freq / (2 x prescale x div)
633 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
635 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
638 static void cp210x_change_speed(struct tty_struct
*tty
,
639 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
643 baud
= tty
->termios
.c_ospeed
;
645 /* This maps the requested rate to a rate valid on cp2102 or cp2103,
646 * or to an arbitrary rate in [1M,2M].
648 * NOTE: B0 is not implemented.
650 baud
= cp210x_quantise_baudrate(baud
);
652 dev_dbg(&port
->dev
, "%s - setting baud rate to %u\n", __func__
, baud
);
653 if (cp210x_set_config(port
, CP210X_SET_BAUDRATE
, &baud
,
655 dev_warn(&port
->dev
, "failed to set baud rate to %u\n", baud
);
657 baud
= old_termios
->c_ospeed
;
662 tty_encode_baud_rate(tty
, baud
, baud
);
665 static void cp210x_set_termios(struct tty_struct
*tty
,
666 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
668 struct device
*dev
= &port
->dev
;
669 unsigned int cflag
, old_cflag
;
671 unsigned int modem_ctl
[4];
676 cflag
= tty
->termios
.c_cflag
;
677 old_cflag
= old_termios
->c_cflag
;
679 if (tty
->termios
.c_ospeed
!= old_termios
->c_ospeed
)
680 cp210x_change_speed(tty
, port
, old_termios
);
682 /* If the number of data bits is to be updated */
683 if ((cflag
& CSIZE
) != (old_cflag
& CSIZE
)) {
684 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
685 bits
&= ~BITS_DATA_MASK
;
686 switch (cflag
& CSIZE
) {
689 dev_dbg(dev
, "%s - data bits = 5\n", __func__
);
693 dev_dbg(dev
, "%s - data bits = 6\n", __func__
);
697 dev_dbg(dev
, "%s - data bits = 7\n", __func__
);
701 dev_dbg(dev
, "%s - data bits = 8\n", __func__
);
705 dev_dbg(dev, "%s - data bits = 9\n", __func__);
708 dev_dbg(dev
, "cp210x driver does not support the number of bits requested, using 8 bit mode\n");
712 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
713 dev_dbg(dev
, "Number of data bits requested not supported by device\n");
716 if ((cflag
& (PARENB
|PARODD
|CMSPAR
)) !=
717 (old_cflag
& (PARENB
|PARODD
|CMSPAR
))) {
718 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
719 bits
&= ~BITS_PARITY_MASK
;
720 if (cflag
& PARENB
) {
721 if (cflag
& CMSPAR
) {
722 if (cflag
& PARODD
) {
723 bits
|= BITS_PARITY_MARK
;
724 dev_dbg(dev
, "%s - parity = MARK\n", __func__
);
726 bits
|= BITS_PARITY_SPACE
;
727 dev_dbg(dev
, "%s - parity = SPACE\n", __func__
);
730 if (cflag
& PARODD
) {
731 bits
|= BITS_PARITY_ODD
;
732 dev_dbg(dev
, "%s - parity = ODD\n", __func__
);
734 bits
|= BITS_PARITY_EVEN
;
735 dev_dbg(dev
, "%s - parity = EVEN\n", __func__
);
739 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
740 dev_dbg(dev
, "Parity mode not supported by device\n");
743 if ((cflag
& CSTOPB
) != (old_cflag
& CSTOPB
)) {
744 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
745 bits
&= ~BITS_STOP_MASK
;
746 if (cflag
& CSTOPB
) {
748 dev_dbg(dev
, "%s - stop bits = 2\n", __func__
);
751 dev_dbg(dev
, "%s - stop bits = 1\n", __func__
);
753 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
754 dev_dbg(dev
, "Number of stop bits requested not supported by device\n");
757 if ((cflag
& CRTSCTS
) != (old_cflag
& CRTSCTS
)) {
758 cp210x_get_config(port
, CP210X_GET_FLOW
, modem_ctl
, 16);
759 dev_dbg(dev
, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
760 __func__
, modem_ctl
[0], modem_ctl
[1],
761 modem_ctl
[2], modem_ctl
[3]);
763 if (cflag
& CRTSCTS
) {
764 modem_ctl
[0] &= ~0x7B;
765 modem_ctl
[0] |= 0x09;
767 dev_dbg(dev
, "%s - flow control = CRTSCTS\n", __func__
);
769 modem_ctl
[0] &= ~0x7B;
770 modem_ctl
[0] |= 0x01;
771 modem_ctl
[1] |= 0x40;
772 dev_dbg(dev
, "%s - flow control = NONE\n", __func__
);
775 dev_dbg(dev
, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
776 __func__
, modem_ctl
[0], modem_ctl
[1],
777 modem_ctl
[2], modem_ctl
[3]);
778 cp210x_set_config(port
, CP210X_SET_FLOW
, modem_ctl
, 16);
783 static int cp210x_tiocmset(struct tty_struct
*tty
,
784 unsigned int set
, unsigned int clear
)
786 struct usb_serial_port
*port
= tty
->driver_data
;
787 return cp210x_tiocmset_port(port
, set
, clear
);
790 static int cp210x_tiocmset_port(struct usb_serial_port
*port
,
791 unsigned int set
, unsigned int clear
)
793 unsigned int control
= 0;
795 if (set
& TIOCM_RTS
) {
796 control
|= CONTROL_RTS
;
797 control
|= CONTROL_WRITE_RTS
;
799 if (set
& TIOCM_DTR
) {
800 control
|= CONTROL_DTR
;
801 control
|= CONTROL_WRITE_DTR
;
803 if (clear
& TIOCM_RTS
) {
804 control
&= ~CONTROL_RTS
;
805 control
|= CONTROL_WRITE_RTS
;
807 if (clear
& TIOCM_DTR
) {
808 control
&= ~CONTROL_DTR
;
809 control
|= CONTROL_WRITE_DTR
;
812 dev_dbg(&port
->dev
, "%s - control = 0x%.4x\n", __func__
, control
);
814 return cp210x_set_config(port
, CP210X_SET_MHS
, &control
, 2);
817 static void cp210x_dtr_rts(struct usb_serial_port
*p
, int on
)
820 cp210x_tiocmset_port(p
, TIOCM_DTR
|TIOCM_RTS
, 0);
822 cp210x_tiocmset_port(p
, 0, TIOCM_DTR
|TIOCM_RTS
);
825 static int cp210x_tiocmget(struct tty_struct
*tty
)
827 struct usb_serial_port
*port
= tty
->driver_data
;
828 unsigned int control
;
831 cp210x_get_config(port
, CP210X_GET_MDMSTS
, &control
, 1);
833 result
= ((control
& CONTROL_DTR
) ? TIOCM_DTR
: 0)
834 |((control
& CONTROL_RTS
) ? TIOCM_RTS
: 0)
835 |((control
& CONTROL_CTS
) ? TIOCM_CTS
: 0)
836 |((control
& CONTROL_DSR
) ? TIOCM_DSR
: 0)
837 |((control
& CONTROL_RING
)? TIOCM_RI
: 0)
838 |((control
& CONTROL_DCD
) ? TIOCM_CD
: 0);
840 dev_dbg(&port
->dev
, "%s - control = 0x%.2x\n", __func__
, control
);
845 static void cp210x_break_ctl(struct tty_struct
*tty
, int break_state
)
847 struct usb_serial_port
*port
= tty
->driver_data
;
850 if (break_state
== 0)
854 dev_dbg(&port
->dev
, "%s - turning break %s\n", __func__
,
855 state
== BREAK_OFF
? "off" : "on");
856 cp210x_set_config(port
, CP210X_SET_BREAK
, &state
, 2);
859 static int cp210x_startup(struct usb_serial
*serial
)
861 struct usb_host_interface
*cur_altsetting
;
862 struct cp210x_serial_private
*spriv
;
864 /* cp210x buffers behave strangely unless device is reset */
865 usb_reset_device(serial
->dev
);
867 spriv
= kzalloc(sizeof(*spriv
), GFP_KERNEL
);
871 cur_altsetting
= serial
->interface
->cur_altsetting
;
872 spriv
->bInterfaceNumber
= cur_altsetting
->desc
.bInterfaceNumber
;
874 usb_set_serial_data(serial
, spriv
);
879 static void cp210x_release(struct usb_serial
*serial
)
881 struct cp210x_serial_private
*spriv
;
883 spriv
= usb_get_serial_data(serial
);
887 module_usb_serial_driver(serial_drivers
, id_table
);
889 MODULE_DESCRIPTION(DRIVER_DESC
);
890 MODULE_LICENSE("GPL");