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(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */
60 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
61 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
62 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
63 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
64 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
65 { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
66 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
67 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
68 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
69 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
70 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
71 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
72 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
73 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
74 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
75 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
76 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
77 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
78 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
79 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
80 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
81 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
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(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */
91 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
92 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
93 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
94 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
95 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
96 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
97 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
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, 0x81D7) }, /* IAI Corp. RCB-CV-USB USB to RS485 Adaptor */
102 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
103 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
104 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
105 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
106 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
107 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
108 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
109 { USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */
110 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
111 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
112 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
113 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
114 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
115 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
116 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
117 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
118 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
119 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
120 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
121 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
122 { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
123 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
124 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
125 { USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */
126 { USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */
127 { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
128 { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
129 { USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */
130 { USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */
131 { USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */
132 { USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */
133 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
134 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
135 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
136 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
137 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
138 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
139 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
140 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
141 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
142 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
143 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
144 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
145 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
146 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
147 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
148 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
149 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
150 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
151 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
152 { USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */
153 { USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */
154 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
155 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
156 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
157 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
158 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
159 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
160 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
161 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
162 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
163 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
164 { USB_DEVICE(0x18EF, 0xE025) }, /* ELV Marble Sound Board 1 */
165 { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
166 { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */
167 { USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */
168 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
169 { USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */
170 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
171 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
172 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */
173 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */
174 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */
175 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */
176 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */
177 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */
178 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */
179 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */
180 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */
181 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */
182 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */
183 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */
184 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */
185 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */
186 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */
187 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */
188 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
189 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */
190 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */
191 { USB_DEVICE(0x2626, 0xEA60) }, /* Aruba Networks 7xxx USB Serial Console */
192 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
193 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
194 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
195 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
196 { } /* Terminating Entry */
199 MODULE_DEVICE_TABLE(usb
, id_table
);
201 struct cp210x_serial_private
{
202 __u8 bInterfaceNumber
;
205 static struct usb_serial_driver cp210x_device
= {
207 .owner
= THIS_MODULE
,
210 .id_table
= id_table
,
213 .bulk_out_size
= 256,
215 .close
= cp210x_close
,
216 .break_ctl
= cp210x_break_ctl
,
217 .set_termios
= cp210x_set_termios
,
218 .tiocmget
= cp210x_tiocmget
,
219 .tiocmset
= cp210x_tiocmset
,
220 .attach
= cp210x_startup
,
221 .release
= cp210x_release
,
222 .dtr_rts
= cp210x_dtr_rts
225 static struct usb_serial_driver
* const serial_drivers
[] = {
229 /* Config request types */
230 #define REQTYPE_HOST_TO_INTERFACE 0x41
231 #define REQTYPE_INTERFACE_TO_HOST 0xc1
232 #define REQTYPE_HOST_TO_DEVICE 0x40
233 #define REQTYPE_DEVICE_TO_HOST 0xc0
235 /* Config request codes */
236 #define CP210X_IFC_ENABLE 0x00
237 #define CP210X_SET_BAUDDIV 0x01
238 #define CP210X_GET_BAUDDIV 0x02
239 #define CP210X_SET_LINE_CTL 0x03
240 #define CP210X_GET_LINE_CTL 0x04
241 #define CP210X_SET_BREAK 0x05
242 #define CP210X_IMM_CHAR 0x06
243 #define CP210X_SET_MHS 0x07
244 #define CP210X_GET_MDMSTS 0x08
245 #define CP210X_SET_XON 0x09
246 #define CP210X_SET_XOFF 0x0A
247 #define CP210X_SET_EVENTMASK 0x0B
248 #define CP210X_GET_EVENTMASK 0x0C
249 #define CP210X_SET_CHAR 0x0D
250 #define CP210X_GET_CHARS 0x0E
251 #define CP210X_GET_PROPS 0x0F
252 #define CP210X_GET_COMM_STATUS 0x10
253 #define CP210X_RESET 0x11
254 #define CP210X_PURGE 0x12
255 #define CP210X_SET_FLOW 0x13
256 #define CP210X_GET_FLOW 0x14
257 #define CP210X_EMBED_EVENTS 0x15
258 #define CP210X_GET_EVENTSTATE 0x16
259 #define CP210X_SET_CHARS 0x19
260 #define CP210X_GET_BAUDRATE 0x1D
261 #define CP210X_SET_BAUDRATE 0x1E
263 /* CP210X_IFC_ENABLE */
264 #define UART_ENABLE 0x0001
265 #define UART_DISABLE 0x0000
267 /* CP210X_(SET|GET)_BAUDDIV */
268 #define BAUD_RATE_GEN_FREQ 0x384000
270 /* CP210X_(SET|GET)_LINE_CTL */
271 #define BITS_DATA_MASK 0X0f00
272 #define BITS_DATA_5 0X0500
273 #define BITS_DATA_6 0X0600
274 #define BITS_DATA_7 0X0700
275 #define BITS_DATA_8 0X0800
276 #define BITS_DATA_9 0X0900
278 #define BITS_PARITY_MASK 0x00f0
279 #define BITS_PARITY_NONE 0x0000
280 #define BITS_PARITY_ODD 0x0010
281 #define BITS_PARITY_EVEN 0x0020
282 #define BITS_PARITY_MARK 0x0030
283 #define BITS_PARITY_SPACE 0x0040
285 #define BITS_STOP_MASK 0x000f
286 #define BITS_STOP_1 0x0000
287 #define BITS_STOP_1_5 0x0001
288 #define BITS_STOP_2 0x0002
290 /* CP210X_SET_BREAK */
291 #define BREAK_ON 0x0001
292 #define BREAK_OFF 0x0000
294 /* CP210X_(SET_MHS|GET_MDMSTS) */
295 #define CONTROL_DTR 0x0001
296 #define CONTROL_RTS 0x0002
297 #define CONTROL_CTS 0x0010
298 #define CONTROL_DSR 0x0020
299 #define CONTROL_RING 0x0040
300 #define CONTROL_DCD 0x0080
301 #define CONTROL_WRITE_DTR 0x0100
302 #define CONTROL_WRITE_RTS 0x0200
306 * Reads from the CP210x configuration registers
307 * 'size' is specified in bytes.
308 * 'data' is a pointer to a pre-allocated array of integers large
309 * enough to hold 'size' bytes (with 4 bytes to each integer)
311 static int cp210x_get_config(struct usb_serial_port
*port
, u8 request
,
312 unsigned int *data
, int size
)
314 struct usb_serial
*serial
= port
->serial
;
315 struct cp210x_serial_private
*spriv
= usb_get_serial_data(serial
);
317 int result
, i
, length
;
319 /* Number of integers required to contain the array */
320 length
= (((size
- 1) | 3) + 1) / 4;
322 buf
= kcalloc(length
, sizeof(__le32
), GFP_KERNEL
);
324 dev_err(&port
->dev
, "%s - out of memory.\n", __func__
);
328 /* Issue the request, attempting to read 'size' bytes */
329 result
= usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
330 request
, REQTYPE_INTERFACE_TO_HOST
, 0x0000,
331 spriv
->bInterfaceNumber
, buf
, size
,
332 USB_CTRL_GET_TIMEOUT
);
334 /* Convert data into an array of integers */
335 for (i
= 0; i
< length
; i
++)
336 data
[i
] = le32_to_cpu(buf
[i
]);
340 if (result
!= size
) {
341 dev_dbg(&port
->dev
, "%s - Unable to send config request, request=0x%x size=%d result=%d\n",
342 __func__
, request
, size
, result
);
354 * Writes to the CP210x configuration registers
355 * Values less than 16 bits wide are sent directly
356 * 'size' is specified in bytes.
358 static int cp210x_set_config(struct usb_serial_port
*port
, u8 request
,
359 unsigned int *data
, int size
)
361 struct usb_serial
*serial
= port
->serial
;
362 struct cp210x_serial_private
*spriv
= usb_get_serial_data(serial
);
364 int result
, i
, length
;
366 /* Number of integers required to contain the array */
367 length
= (((size
- 1) | 3) + 1) / 4;
369 buf
= kmalloc(length
* sizeof(__le32
), GFP_KERNEL
);
371 dev_err(&port
->dev
, "%s - out of memory.\n", __func__
);
375 /* Array of integers into bytes */
376 for (i
= 0; i
< length
; i
++)
377 buf
[i
] = cpu_to_le32(data
[i
]);
380 result
= usb_control_msg(serial
->dev
,
381 usb_sndctrlpipe(serial
->dev
, 0),
382 request
, REQTYPE_HOST_TO_INTERFACE
, 0x0000,
383 spriv
->bInterfaceNumber
, buf
, size
,
384 USB_CTRL_SET_TIMEOUT
);
386 result
= usb_control_msg(serial
->dev
,
387 usb_sndctrlpipe(serial
->dev
, 0),
388 request
, REQTYPE_HOST_TO_INTERFACE
, data
[0],
389 spriv
->bInterfaceNumber
, NULL
, 0,
390 USB_CTRL_SET_TIMEOUT
);
395 if ((size
> 2 && result
!= size
) || result
< 0) {
396 dev_dbg(&port
->dev
, "%s - Unable to send request, request=0x%x size=%d result=%d\n",
397 __func__
, request
, size
, result
);
408 * cp210x_set_config_single
409 * Convenience function for calling cp210x_set_config on single data values
410 * without requiring an integer pointer
412 static inline int cp210x_set_config_single(struct usb_serial_port
*port
,
413 u8 request
, unsigned int data
)
415 return cp210x_set_config(port
, request
, &data
, 2);
419 * cp210x_quantise_baudrate
420 * Quantises the baud rate as per AN205 Table 1
422 static unsigned int cp210x_quantise_baudrate(unsigned int baud
)
426 else if (baud
<= 600) baud
= 600;
427 else if (baud
<= 1200) baud
= 1200;
428 else if (baud
<= 1800) baud
= 1800;
429 else if (baud
<= 2400) baud
= 2400;
430 else if (baud
<= 4000) baud
= 4000;
431 else if (baud
<= 4803) baud
= 4800;
432 else if (baud
<= 7207) baud
= 7200;
433 else if (baud
<= 9612) baud
= 9600;
434 else if (baud
<= 14428) baud
= 14400;
435 else if (baud
<= 16062) baud
= 16000;
436 else if (baud
<= 19250) baud
= 19200;
437 else if (baud
<= 28912) baud
= 28800;
438 else if (baud
<= 38601) baud
= 38400;
439 else if (baud
<= 51558) baud
= 51200;
440 else if (baud
<= 56280) baud
= 56000;
441 else if (baud
<= 58053) baud
= 57600;
442 else if (baud
<= 64111) baud
= 64000;
443 else if (baud
<= 77608) baud
= 76800;
444 else if (baud
<= 117028) baud
= 115200;
445 else if (baud
<= 129347) baud
= 128000;
446 else if (baud
<= 156868) baud
= 153600;
447 else if (baud
<= 237832) baud
= 230400;
448 else if (baud
<= 254234) baud
= 250000;
449 else if (baud
<= 273066) baud
= 256000;
450 else if (baud
<= 491520) baud
= 460800;
451 else if (baud
<= 567138) baud
= 500000;
452 else if (baud
<= 670254) baud
= 576000;
453 else if (baud
< 1000000)
455 else if (baud
> 2000000)
460 static int cp210x_open(struct tty_struct
*tty
, struct usb_serial_port
*port
)
464 result
= cp210x_set_config_single(port
, CP210X_IFC_ENABLE
,
467 dev_err(&port
->dev
, "%s - Unable to enable UART\n", __func__
);
471 /* Configure the termios structure */
472 cp210x_get_termios(tty
, port
);
474 /* The baud rate must be initialised on cp2104 */
476 cp210x_change_speed(tty
, port
, NULL
);
478 return usb_serial_generic_open(tty
, port
);
481 static void cp210x_close(struct usb_serial_port
*port
)
483 usb_serial_generic_close(port
);
484 cp210x_set_config_single(port
, CP210X_IFC_ENABLE
, UART_DISABLE
);
489 * Reads the baud rate, data bits, parity, stop bits and flow control mode
490 * from the device, corrects any unsupported values, and configures the
491 * termios structure to reflect the state of the device
493 static void cp210x_get_termios(struct tty_struct
*tty
,
494 struct usb_serial_port
*port
)
499 cp210x_get_termios_port(tty
->driver_data
,
500 &tty
->termios
.c_cflag
, &baud
);
501 tty_encode_baud_rate(tty
, baud
, baud
);
505 cp210x_get_termios_port(port
, &cflag
, &baud
);
510 * cp210x_get_termios_port
511 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
513 static void cp210x_get_termios_port(struct usb_serial_port
*port
,
514 unsigned int *cflagp
, unsigned int *baudp
)
516 struct device
*dev
= &port
->dev
;
517 unsigned int cflag
, modem_ctl
[4];
521 cp210x_get_config(port
, CP210X_GET_BAUDRATE
, &baud
, 4);
523 dev_dbg(dev
, "%s - baud rate = %d\n", __func__
, baud
);
528 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
530 switch (bits
& BITS_DATA_MASK
) {
532 dev_dbg(dev
, "%s - data bits = 5\n", __func__
);
536 dev_dbg(dev
, "%s - data bits = 6\n", __func__
);
540 dev_dbg(dev
, "%s - data bits = 7\n", __func__
);
544 dev_dbg(dev
, "%s - data bits = 8\n", __func__
);
548 dev_dbg(dev
, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__
);
550 bits
&= ~BITS_DATA_MASK
;
552 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
555 dev_dbg(dev
, "%s - Unknown number of data bits, using 8\n", __func__
);
557 bits
&= ~BITS_DATA_MASK
;
559 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
563 switch (bits
& BITS_PARITY_MASK
) {
564 case BITS_PARITY_NONE
:
565 dev_dbg(dev
, "%s - parity = NONE\n", __func__
);
568 case BITS_PARITY_ODD
:
569 dev_dbg(dev
, "%s - parity = ODD\n", __func__
);
570 cflag
|= (PARENB
|PARODD
);
572 case BITS_PARITY_EVEN
:
573 dev_dbg(dev
, "%s - parity = EVEN\n", __func__
);
577 case BITS_PARITY_MARK
:
578 dev_dbg(dev
, "%s - parity = MARK\n", __func__
);
579 cflag
|= (PARENB
|PARODD
|CMSPAR
);
581 case BITS_PARITY_SPACE
:
582 dev_dbg(dev
, "%s - parity = SPACE\n", __func__
);
584 cflag
|= (PARENB
|CMSPAR
);
587 dev_dbg(dev
, "%s - Unknown parity mode, disabling parity\n", __func__
);
589 bits
&= ~BITS_PARITY_MASK
;
590 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
595 switch (bits
& BITS_STOP_MASK
) {
597 dev_dbg(dev
, "%s - stop bits = 1\n", __func__
);
600 dev_dbg(dev
, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__
);
601 bits
&= ~BITS_STOP_MASK
;
602 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
605 dev_dbg(dev
, "%s - stop bits = 2\n", __func__
);
609 dev_dbg(dev
, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__
);
610 bits
&= ~BITS_STOP_MASK
;
611 cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2);
615 cp210x_get_config(port
, CP210X_GET_FLOW
, modem_ctl
, 16);
616 if (modem_ctl
[0] & 0x0008) {
617 dev_dbg(dev
, "%s - flow control = CRTSCTS\n", __func__
);
620 dev_dbg(dev
, "%s - flow control = NONE\n", __func__
);
628 * CP2101 supports the following baud rates:
630 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
631 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
633 * CP2102 and CP2103 support the following additional rates:
635 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
638 * The device will map a requested rate to a supported one, but the result
639 * of requests for rates greater than 1053257 is undefined (see AN205).
641 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
642 * respectively, with an error less than 1%. The actual rates are determined
645 * div = round(freq / (2 x prescale x request))
646 * actual = freq / (2 x prescale x div)
648 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
650 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
653 static void cp210x_change_speed(struct tty_struct
*tty
,
654 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
658 baud
= tty
->termios
.c_ospeed
;
660 /* This maps the requested rate to a rate valid on cp2102 or cp2103,
661 * or to an arbitrary rate in [1M,2M].
663 * NOTE: B0 is not implemented.
665 baud
= cp210x_quantise_baudrate(baud
);
667 dev_dbg(&port
->dev
, "%s - setting baud rate to %u\n", __func__
, baud
);
668 if (cp210x_set_config(port
, CP210X_SET_BAUDRATE
, &baud
,
670 dev_warn(&port
->dev
, "failed to set baud rate to %u\n", baud
);
672 baud
= old_termios
->c_ospeed
;
677 tty_encode_baud_rate(tty
, baud
, baud
);
680 static void cp210x_set_termios(struct tty_struct
*tty
,
681 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
683 struct device
*dev
= &port
->dev
;
684 unsigned int cflag
, old_cflag
;
686 unsigned int modem_ctl
[4];
688 dev_dbg(dev
, "%s - port %d\n", __func__
, port
->number
);
693 cflag
= tty
->termios
.c_cflag
;
694 old_cflag
= old_termios
->c_cflag
;
696 if (tty
->termios
.c_ospeed
!= old_termios
->c_ospeed
)
697 cp210x_change_speed(tty
, port
, old_termios
);
699 /* If the number of data bits is to be updated */
700 if ((cflag
& CSIZE
) != (old_cflag
& CSIZE
)) {
701 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
702 bits
&= ~BITS_DATA_MASK
;
703 switch (cflag
& CSIZE
) {
706 dev_dbg(dev
, "%s - data bits = 5\n", __func__
);
710 dev_dbg(dev
, "%s - data bits = 6\n", __func__
);
714 dev_dbg(dev
, "%s - data bits = 7\n", __func__
);
718 dev_dbg(dev
, "%s - data bits = 8\n", __func__
);
722 dev_dbg(dev, "%s - data bits = 9\n", __func__);
725 dev_dbg(dev
, "cp210x driver does not support the number of bits requested, using 8 bit mode\n");
729 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
730 dev_dbg(dev
, "Number of data bits requested not supported by device\n");
733 if ((cflag
& (PARENB
|PARODD
|CMSPAR
)) !=
734 (old_cflag
& (PARENB
|PARODD
|CMSPAR
))) {
735 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
736 bits
&= ~BITS_PARITY_MASK
;
737 if (cflag
& PARENB
) {
738 if (cflag
& CMSPAR
) {
739 if (cflag
& PARODD
) {
740 bits
|= BITS_PARITY_MARK
;
741 dev_dbg(dev
, "%s - parity = MARK\n", __func__
);
743 bits
|= BITS_PARITY_SPACE
;
744 dev_dbg(dev
, "%s - parity = SPACE\n", __func__
);
747 if (cflag
& PARODD
) {
748 bits
|= BITS_PARITY_ODD
;
749 dev_dbg(dev
, "%s - parity = ODD\n", __func__
);
751 bits
|= BITS_PARITY_EVEN
;
752 dev_dbg(dev
, "%s - parity = EVEN\n", __func__
);
756 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
757 dev_dbg(dev
, "Parity mode not supported by device\n");
760 if ((cflag
& CSTOPB
) != (old_cflag
& CSTOPB
)) {
761 cp210x_get_config(port
, CP210X_GET_LINE_CTL
, &bits
, 2);
762 bits
&= ~BITS_STOP_MASK
;
763 if (cflag
& CSTOPB
) {
765 dev_dbg(dev
, "%s - stop bits = 2\n", __func__
);
768 dev_dbg(dev
, "%s - stop bits = 1\n", __func__
);
770 if (cp210x_set_config(port
, CP210X_SET_LINE_CTL
, &bits
, 2))
771 dev_dbg(dev
, "Number of stop bits requested not supported by device\n");
774 if ((cflag
& CRTSCTS
) != (old_cflag
& CRTSCTS
)) {
775 cp210x_get_config(port
, CP210X_GET_FLOW
, modem_ctl
, 16);
776 dev_dbg(dev
, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
777 __func__
, modem_ctl
[0], modem_ctl
[1],
778 modem_ctl
[2], modem_ctl
[3]);
780 if (cflag
& CRTSCTS
) {
781 modem_ctl
[0] &= ~0x7B;
782 modem_ctl
[0] |= 0x09;
784 dev_dbg(dev
, "%s - flow control = CRTSCTS\n", __func__
);
786 modem_ctl
[0] &= ~0x7B;
787 modem_ctl
[0] |= 0x01;
788 modem_ctl
[1] |= 0x40;
789 dev_dbg(dev
, "%s - flow control = NONE\n", __func__
);
792 dev_dbg(dev
, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
793 __func__
, modem_ctl
[0], modem_ctl
[1],
794 modem_ctl
[2], modem_ctl
[3]);
795 cp210x_set_config(port
, CP210X_SET_FLOW
, modem_ctl
, 16);
800 static int cp210x_tiocmset(struct tty_struct
*tty
,
801 unsigned int set
, unsigned int clear
)
803 struct usb_serial_port
*port
= tty
->driver_data
;
804 return cp210x_tiocmset_port(port
, set
, clear
);
807 static int cp210x_tiocmset_port(struct usb_serial_port
*port
,
808 unsigned int set
, unsigned int clear
)
810 unsigned int control
= 0;
812 if (set
& TIOCM_RTS
) {
813 control
|= CONTROL_RTS
;
814 control
|= CONTROL_WRITE_RTS
;
816 if (set
& TIOCM_DTR
) {
817 control
|= CONTROL_DTR
;
818 control
|= CONTROL_WRITE_DTR
;
820 if (clear
& TIOCM_RTS
) {
821 control
&= ~CONTROL_RTS
;
822 control
|= CONTROL_WRITE_RTS
;
824 if (clear
& TIOCM_DTR
) {
825 control
&= ~CONTROL_DTR
;
826 control
|= CONTROL_WRITE_DTR
;
829 dev_dbg(&port
->dev
, "%s - control = 0x%.4x\n", __func__
, control
);
831 return cp210x_set_config(port
, CP210X_SET_MHS
, &control
, 2);
834 static void cp210x_dtr_rts(struct usb_serial_port
*p
, int on
)
837 cp210x_tiocmset_port(p
, TIOCM_DTR
|TIOCM_RTS
, 0);
839 cp210x_tiocmset_port(p
, 0, TIOCM_DTR
|TIOCM_RTS
);
842 static int cp210x_tiocmget(struct tty_struct
*tty
)
844 struct usb_serial_port
*port
= tty
->driver_data
;
845 unsigned int control
;
848 cp210x_get_config(port
, CP210X_GET_MDMSTS
, &control
, 1);
850 result
= ((control
& CONTROL_DTR
) ? TIOCM_DTR
: 0)
851 |((control
& CONTROL_RTS
) ? TIOCM_RTS
: 0)
852 |((control
& CONTROL_CTS
) ? TIOCM_CTS
: 0)
853 |((control
& CONTROL_DSR
) ? TIOCM_DSR
: 0)
854 |((control
& CONTROL_RING
)? TIOCM_RI
: 0)
855 |((control
& CONTROL_DCD
) ? TIOCM_CD
: 0);
857 dev_dbg(&port
->dev
, "%s - control = 0x%.2x\n", __func__
, control
);
862 static void cp210x_break_ctl(struct tty_struct
*tty
, int break_state
)
864 struct usb_serial_port
*port
= tty
->driver_data
;
867 if (break_state
== 0)
871 dev_dbg(&port
->dev
, "%s - turning break %s\n", __func__
,
872 state
== BREAK_OFF
? "off" : "on");
873 cp210x_set_config(port
, CP210X_SET_BREAK
, &state
, 2);
876 static int cp210x_startup(struct usb_serial
*serial
)
878 struct usb_host_interface
*cur_altsetting
;
879 struct cp210x_serial_private
*spriv
;
881 /* cp210x buffers behave strangely unless device is reset */
882 usb_reset_device(serial
->dev
);
884 spriv
= kzalloc(sizeof(*spriv
), GFP_KERNEL
);
888 cur_altsetting
= serial
->interface
->cur_altsetting
;
889 spriv
->bInterfaceNumber
= cur_altsetting
->desc
.bInterfaceNumber
;
891 usb_set_serial_data(serial
, spriv
);
896 static void cp210x_release(struct usb_serial
*serial
)
898 struct cp210x_serial_private
*spriv
;
900 spriv
= usb_get_serial_data(serial
);
904 module_usb_serial_driver(serial_drivers
, id_table
);
906 MODULE_DESCRIPTION(DRIVER_DESC
);
907 MODULE_LICENSE("GPL");