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(0x0B00, 0x3070) }, /* Ingenico 3070 */
61 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
62 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
63 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
64 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
65 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
66 { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
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, 0x8056) }, /* Lorenz Messtechnik devices */
80 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
81 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
82 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
83 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
84 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
85 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
86 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
87 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
88 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
89 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
90 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
91 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
92 { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */
93 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
94 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
95 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
96 { USB_DEVICE(0x10C4, 0x817C) }, /* CESINEL MEDCAL N Power Quality Monitor */
97 { USB_DEVICE(0x10C4, 0x817D) }, /* CESINEL MEDCAL NT Power Quality Monitor */
98 { USB_DEVICE(0x10C4, 0x817E) }, /* CESINEL MEDCAL S Power Quality Monitor */
99 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
100 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
101 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
102 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
103 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
104 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
105 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
106 { USB_DEVICE(0x10C4, 0x81D7) }, /* IAI Corp. RCB-CV-USB USB to RS485 Adaptor */
107 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
108 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
109 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
110 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
111 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
112 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
113 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
114 { USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */
115 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
116 { USB_DEVICE(0x10C4, 0x82EF) }, /* CESINEL FALCO 6105 AC Power Supply */
117 { USB_DEVICE(0x10C4, 0x82F1) }, /* CESINEL MEDCAL EFD Earth Fault Detector */
118 { USB_DEVICE(0x10C4, 0x82F2) }, /* CESINEL MEDCAL ST Network Analyzer */
119 { USB_DEVICE(0x10C4, 0x82F4) }, /* Starizona MicroTouch */
120 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
121 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
122 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
123 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
124 { USB_DEVICE(0x10C4, 0x83AA) }, /* Mark-10 Digital Force Gauge */
125 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
126 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
127 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
128 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
129 { USB_DEVICE(0x10C4, 0x8470) }, /* Juniper Networks BX Series System Console */
130 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
131 { USB_DEVICE(0x10C4, 0x84B6) }, /* Starizona Hyperion */
132 { USB_DEVICE(0x10C4, 0x851E) }, /* CESINEL MEDCAL PT Network Analyzer */
133 { USB_DEVICE(0x10C4, 0x85A7) }, /* LifeScan OneTouch Verio IQ */
134 { USB_DEVICE(0x10C4, 0x85B8) }, /* CESINEL ReCon T Energy Logger */
135 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
136 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
137 { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
138 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
139 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
140 { USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */
141 { USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */
142 { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
143 { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
144 { USB_DEVICE(0x10C4, 0x88FB) }, /* CESINEL MEDCAL STII Network Analyzer */
145 { USB_DEVICE(0x10C4, 0x8938) }, /* CESINEL MEDCAL S II Network Analyzer */
146 { USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */
147 { USB_DEVICE(0x10C4, 0x8962) }, /* Brim Brothers charging dock */
148 { USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */
149 { USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */
150 { USB_DEVICE(0x10C4, 0x89A4) }, /* CESINEL FTBC Flexible Thyristor Bridge Controller */
151 { USB_DEVICE(0x10C4, 0x89FB) }, /* Qivicon ZigBee USB Radio Stick */
152 { USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */
153 { USB_DEVICE(0x10C4, 0x8A5E) }, /* CEL EM3588 ZigBee USB Stick Long Range */
154 { USB_DEVICE(0x10C4, 0x8B34) }, /* Qivicon ZigBee USB Radio Stick */
155 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
156 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
157 { USB_DEVICE(0x10C4, 0xEA63) }, /* Silicon Labs Windows Update (CP2101-4/CP2102N) */
158 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
159 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
160 { USB_DEVICE(0x10C4, 0xEA7A) }, /* Silicon Labs Windows Update (CP2105) */
161 { USB_DEVICE(0x10C4, 0xEA7B) }, /* Silicon Labs Windows Update (CP2108) */
162 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
163 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
164 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
165 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
166 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
167 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
168 { USB_DEVICE(0x12B8, 0xEC60) }, /* Link G4 ECU */
169 { USB_DEVICE(0x12B8, 0xEC62) }, /* Link G4+ ECU */
170 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
171 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
172 { USB_DEVICE(0x155A, 0x1006) }, /* ELDAT Easywave RX09 */
173 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
174 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
175 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
176 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
177 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
178 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
179 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
180 { USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */
181 { USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */
182 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
183 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
184 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
185 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
186 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
187 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
188 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
189 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
190 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
191 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
192 { USB_DEVICE(0x18EF, 0xE025) }, /* ELV Marble Sound Board 1 */
193 { USB_DEVICE(0x18EF, 0xE030) }, /* ELV ALC 8xxx Battery Charger */
194 { USB_DEVICE(0x18EF, 0xE032) }, /* ELV TFD500 Data Logger */
195 { USB_DEVICE(0x1901, 0x0190) }, /* GE B850 CP2105 Recorder interface */
196 { USB_DEVICE(0x1901, 0x0193) }, /* GE B650 CP2104 PMC interface */
197 { USB_DEVICE(0x1901, 0x0194) }, /* GE Healthcare Remote Alarm Box */
198 { USB_DEVICE(0x1901, 0x0195) }, /* GE B850/B650/B450 CP2104 DP UART interface */
199 { USB_DEVICE(0x1901, 0x0196) }, /* GE B850 CP2105 DP UART interface */
200 { USB_DEVICE(0x19CF, 0x3000) }, /* Parrot NMEA GPS Flight Recorder */
201 { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
202 { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */
203 { USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */
204 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
205 { USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */
206 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
207 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
208 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */
209 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */
210 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */
211 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */
212 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */
213 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */
214 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */
215 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */
216 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */
217 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */
218 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */
219 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */
220 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */
221 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */
222 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */
223 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */
224 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
225 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */
226 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */
227 { USB_DEVICE(0x2626, 0xEA60) }, /* Aruba Networks 7xxx USB Serial Console */
228 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
229 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
230 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
231 { USB_DEVICE(0x3923, 0x7A0B) }, /* National Instruments USB Serial Console */
232 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
233 { } /* Terminating Entry */
236 MODULE_DEVICE_TABLE(usb, id_table);
238 struct cp210x_serial_private {
239 __u8 bInterfaceNumber;
242 static struct usb_serial_driver cp210x_device = {
244 .owner = THIS_MODULE,
247 .id_table = id_table,
250 .bulk_out_size = 256,
252 .close = cp210x_close,
253 .break_ctl = cp210x_break_ctl,
254 .set_termios = cp210x_set_termios,
255 .tiocmget = cp210x_tiocmget,
256 .tiocmset = cp210x_tiocmset,
257 .attach = cp210x_startup,
258 .release = cp210x_release,
259 .dtr_rts = cp210x_dtr_rts
262 static struct usb_serial_driver * const serial_drivers[] = {
266 /* Config request types */
267 #define REQTYPE_HOST_TO_INTERFACE 0x41
268 #define REQTYPE_INTERFACE_TO_HOST 0xc1
269 #define REQTYPE_HOST_TO_DEVICE 0x40
270 #define REQTYPE_DEVICE_TO_HOST 0xc0
272 /* Config request codes */
273 #define CP210X_IFC_ENABLE 0x00
274 #define CP210X_SET_BAUDDIV 0x01
275 #define CP210X_GET_BAUDDIV 0x02
276 #define CP210X_SET_LINE_CTL 0x03
277 #define CP210X_GET_LINE_CTL 0x04
278 #define CP210X_SET_BREAK 0x05
279 #define CP210X_IMM_CHAR 0x06
280 #define CP210X_SET_MHS 0x07
281 #define CP210X_GET_MDMSTS 0x08
282 #define CP210X_SET_XON 0x09
283 #define CP210X_SET_XOFF 0x0A
284 #define CP210X_SET_EVENTMASK 0x0B
285 #define CP210X_GET_EVENTMASK 0x0C
286 #define CP210X_SET_CHAR 0x0D
287 #define CP210X_GET_CHARS 0x0E
288 #define CP210X_GET_PROPS 0x0F
289 #define CP210X_GET_COMM_STATUS 0x10
290 #define CP210X_RESET 0x11
291 #define CP210X_PURGE 0x12
292 #define CP210X_SET_FLOW 0x13
293 #define CP210X_GET_FLOW 0x14
294 #define CP210X_EMBED_EVENTS 0x15
295 #define CP210X_GET_EVENTSTATE 0x16
296 #define CP210X_SET_CHARS 0x19
297 #define CP210X_GET_BAUDRATE 0x1D
298 #define CP210X_SET_BAUDRATE 0x1E
300 /* CP210X_IFC_ENABLE */
301 #define UART_ENABLE 0x0001
302 #define UART_DISABLE 0x0000
304 /* CP210X_(SET|GET)_BAUDDIV */
305 #define BAUD_RATE_GEN_FREQ 0x384000
307 /* CP210X_(SET|GET)_LINE_CTL */
308 #define BITS_DATA_MASK 0X0f00
309 #define BITS_DATA_5 0X0500
310 #define BITS_DATA_6 0X0600
311 #define BITS_DATA_7 0X0700
312 #define BITS_DATA_8 0X0800
313 #define BITS_DATA_9 0X0900
315 #define BITS_PARITY_MASK 0x00f0
316 #define BITS_PARITY_NONE 0x0000
317 #define BITS_PARITY_ODD 0x0010
318 #define BITS_PARITY_EVEN 0x0020
319 #define BITS_PARITY_MARK 0x0030
320 #define BITS_PARITY_SPACE 0x0040
322 #define BITS_STOP_MASK 0x000f
323 #define BITS_STOP_1 0x0000
324 #define BITS_STOP_1_5 0x0001
325 #define BITS_STOP_2 0x0002
327 /* CP210X_SET_BREAK */
328 #define BREAK_ON 0x0001
329 #define BREAK_OFF 0x0000
331 /* CP210X_(SET_MHS|GET_MDMSTS) */
332 #define CONTROL_DTR 0x0001
333 #define CONTROL_RTS 0x0002
334 #define CONTROL_CTS 0x0010
335 #define CONTROL_DSR 0x0020
336 #define CONTROL_RING 0x0040
337 #define CONTROL_DCD 0x0080
338 #define CONTROL_WRITE_DTR 0x0100
339 #define CONTROL_WRITE_RTS 0x0200
343 * Reads from the CP210x configuration registers
344 * 'size' is specified in bytes.
345 * 'data' is a pointer to a pre-allocated array of integers large
346 * enough to hold 'size' bytes (with 4 bytes to each integer)
348 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
349 unsigned int *data, int size)
351 struct usb_serial *serial = port->serial;
352 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
354 int result, i, length;
356 /* Number of integers required to contain the array */
357 length = (((size - 1) | 3) + 1) / 4;
359 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
363 /* Issue the request, attempting to read 'size' bytes */
364 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
365 request, REQTYPE_INTERFACE_TO_HOST, 0x0000,
366 spriv->bInterfaceNumber, buf, size,
367 USB_CTRL_GET_TIMEOUT);
369 /* Convert data into an array of integers */
370 for (i = 0; i < length; i++)
371 data[i] = le32_to_cpu(buf[i]);
375 if (result != size) {
376 dev_dbg(&port->dev, "%s - Unable to send config request, request=0x%x size=%d result=%d\n",
377 __func__, request, size, result);
389 * Writes to the CP210x configuration registers
390 * Values less than 16 bits wide are sent directly
391 * 'size' is specified in bytes.
393 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
394 unsigned int *data, int size)
396 struct usb_serial *serial = port->serial;
397 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
399 int result, i, length;
401 /* Number of integers required to contain the array */
402 length = (((size - 1) | 3) + 1) / 4;
404 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
408 /* Array of integers into bytes */
409 for (i = 0; i < length; i++)
410 buf[i] = cpu_to_le32(data[i]);
413 result = usb_control_msg(serial->dev,
414 usb_sndctrlpipe(serial->dev, 0),
415 request, REQTYPE_HOST_TO_INTERFACE, 0x0000,
416 spriv->bInterfaceNumber, buf, size,
417 USB_CTRL_SET_TIMEOUT);
419 result = usb_control_msg(serial->dev,
420 usb_sndctrlpipe(serial->dev, 0),
421 request, REQTYPE_HOST_TO_INTERFACE, data[0],
422 spriv->bInterfaceNumber, NULL, 0,
423 USB_CTRL_SET_TIMEOUT);
428 if ((size > 2 && result != size) || result < 0) {
429 dev_dbg(&port->dev, "%s - Unable to send request, request=0x%x size=%d result=%d\n",
430 __func__, request, size, result);
441 * cp210x_set_config_single
442 * Convenience function for calling cp210x_set_config on single data values
443 * without requiring an integer pointer
445 static inline int cp210x_set_config_single(struct usb_serial_port *port,
446 u8 request, unsigned int data)
448 return cp210x_set_config(port, request, &data, 2);
452 * cp210x_quantise_baudrate
453 * Quantises the baud rate as per AN205 Table 1
455 static unsigned int cp210x_quantise_baudrate(unsigned int baud)
459 else if (baud <= 600) baud = 600;
460 else if (baud <= 1200) baud = 1200;
461 else if (baud <= 1800) baud = 1800;
462 else if (baud <= 2400) baud = 2400;
463 else if (baud <= 4000) baud = 4000;
464 else if (baud <= 4803) baud = 4800;
465 else if (baud <= 7207) baud = 7200;
466 else if (baud <= 9612) baud = 9600;
467 else if (baud <= 14428) baud = 14400;
468 else if (baud <= 16062) baud = 16000;
469 else if (baud <= 19250) baud = 19200;
470 else if (baud <= 28912) baud = 28800;
471 else if (baud <= 38601) baud = 38400;
472 else if (baud <= 51558) baud = 51200;
473 else if (baud <= 56280) baud = 56000;
474 else if (baud <= 58053) baud = 57600;
475 else if (baud <= 64111) baud = 64000;
476 else if (baud <= 77608) baud = 76800;
477 else if (baud <= 117028) baud = 115200;
478 else if (baud <= 129347) baud = 128000;
479 else if (baud <= 156868) baud = 153600;
480 else if (baud <= 237832) baud = 230400;
481 else if (baud <= 254234) baud = 250000;
482 else if (baud <= 273066) baud = 256000;
483 else if (baud <= 491520) baud = 460800;
484 else if (baud <= 567138) baud = 500000;
485 else if (baud <= 670254) baud = 576000;
486 else if (baud < 1000000)
488 else if (baud > 2000000)
493 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
497 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE,
500 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
504 /* Configure the termios structure */
505 cp210x_get_termios(tty, port);
507 /* The baud rate must be initialised on cp2104 */
509 cp210x_change_speed(tty, port, NULL);
511 return usb_serial_generic_open(tty, port);
514 static void cp210x_close(struct usb_serial_port *port)
516 usb_serial_generic_close(port);
517 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
522 * Reads the baud rate, data bits, parity, stop bits and flow control mode
523 * from the device, corrects any unsupported values, and configures the
524 * termios structure to reflect the state of the device
526 static void cp210x_get_termios(struct tty_struct *tty,
527 struct usb_serial_port *port)
532 cp210x_get_termios_port(tty->driver_data,
533 &tty->termios.c_cflag, &baud);
534 tty_encode_baud_rate(tty, baud, baud);
538 cp210x_get_termios_port(port, &cflag, &baud);
543 * cp210x_get_termios_port
544 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
546 static void cp210x_get_termios_port(struct usb_serial_port *port,
547 unsigned int *cflagp, unsigned int *baudp)
549 struct device *dev = &port->dev;
550 unsigned int cflag, modem_ctl[4];
554 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4);
556 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
561 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
563 switch (bits & BITS_DATA_MASK) {
565 dev_dbg(dev, "%s - data bits = 5\n", __func__);
569 dev_dbg(dev, "%s - data bits = 6\n", __func__);
573 dev_dbg(dev, "%s - data bits = 7\n", __func__);
577 dev_dbg(dev, "%s - data bits = 8\n", __func__);
581 dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__);
583 bits &= ~BITS_DATA_MASK;
585 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
588 dev_dbg(dev, "%s - Unknown number of data bits, using 8\n", __func__);
590 bits &= ~BITS_DATA_MASK;
592 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
596 switch (bits & BITS_PARITY_MASK) {
597 case BITS_PARITY_NONE:
598 dev_dbg(dev, "%s - parity = NONE\n", __func__);
601 case BITS_PARITY_ODD:
602 dev_dbg(dev, "%s - parity = ODD\n", __func__);
603 cflag |= (PARENB|PARODD);
605 case BITS_PARITY_EVEN:
606 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
610 case BITS_PARITY_MARK:
611 dev_dbg(dev, "%s - parity = MARK\n", __func__);
612 cflag |= (PARENB|PARODD|CMSPAR);
614 case BITS_PARITY_SPACE:
615 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
617 cflag |= (PARENB|CMSPAR);
620 dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __func__);
622 bits &= ~BITS_PARITY_MASK;
623 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
628 switch (bits & BITS_STOP_MASK) {
630 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
633 dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__);
634 bits &= ~BITS_STOP_MASK;
635 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
638 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
642 dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__);
643 bits &= ~BITS_STOP_MASK;
644 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
648 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
649 if (modem_ctl[0] & 0x0008) {
650 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
653 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
661 * CP2101 supports the following baud rates:
663 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
664 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
666 * CP2102 and CP2103 support the following additional rates:
668 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
671 * The device will map a requested rate to a supported one, but the result
672 * of requests for rates greater than 1053257 is undefined (see AN205).
674 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
675 * respectively, with an error less than 1%. The actual rates are determined
678 * div = round(freq / (2 x prescale x request))
679 * actual = freq / (2 x prescale x div)
681 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
683 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
686 static void cp210x_change_speed(struct tty_struct *tty,
687 struct usb_serial_port *port, struct ktermios *old_termios)
691 baud = tty->termios.c_ospeed;
693 /* This maps the requested rate to a rate valid on cp2102 or cp2103,
694 * or to an arbitrary rate in [1M,2M].
696 * NOTE: B0 is not implemented.
698 baud = cp210x_quantise_baudrate(baud);
700 dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud);
701 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud,
703 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud);
705 baud = old_termios->c_ospeed;
710 tty_encode_baud_rate(tty, baud, baud);
713 static void cp210x_set_termios(struct tty_struct *tty,
714 struct usb_serial_port *port, struct ktermios *old_termios)
716 struct device *dev = &port->dev;
717 unsigned int cflag, old_cflag;
719 unsigned int modem_ctl[4];
721 cflag = tty->termios.c_cflag;
722 old_cflag = old_termios->c_cflag;
724 if (tty->termios.c_ospeed != old_termios->c_ospeed)
725 cp210x_change_speed(tty, port, old_termios);
727 /* If the number of data bits is to be updated */
728 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
729 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
730 bits &= ~BITS_DATA_MASK;
731 switch (cflag & CSIZE) {
734 dev_dbg(dev, "%s - data bits = 5\n", __func__);
738 dev_dbg(dev, "%s - data bits = 6\n", __func__);
742 dev_dbg(dev, "%s - data bits = 7\n", __func__);
746 dev_dbg(dev, "%s - data bits = 8\n", __func__);
750 dev_dbg(dev, "%s - data bits = 9\n", __func__);
753 dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n");
757 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
758 dev_dbg(dev, "Number of data bits requested not supported by device\n");
761 if ((cflag & (PARENB|PARODD|CMSPAR)) !=
762 (old_cflag & (PARENB|PARODD|CMSPAR))) {
763 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
764 bits &= ~BITS_PARITY_MASK;
765 if (cflag & PARENB) {
766 if (cflag & CMSPAR) {
767 if (cflag & PARODD) {
768 bits |= BITS_PARITY_MARK;
769 dev_dbg(dev, "%s - parity = MARK\n", __func__);
771 bits |= BITS_PARITY_SPACE;
772 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
775 if (cflag & PARODD) {
776 bits |= BITS_PARITY_ODD;
777 dev_dbg(dev, "%s - parity = ODD\n", __func__);
779 bits |= BITS_PARITY_EVEN;
780 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
784 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
785 dev_dbg(dev, "Parity mode not supported by device\n");
788 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
789 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
790 bits &= ~BITS_STOP_MASK;
791 if (cflag & CSTOPB) {
793 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
796 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
798 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
799 dev_dbg(dev, "Number of stop bits requested not supported by device\n");
802 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
803 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
804 dev_dbg(dev, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
805 __func__, modem_ctl[0], modem_ctl[1],
806 modem_ctl[2], modem_ctl[3]);
808 if (cflag & CRTSCTS) {
809 modem_ctl[0] &= ~0x7B;
810 modem_ctl[0] |= 0x09;
812 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
814 modem_ctl[0] &= ~0x7B;
815 modem_ctl[0] |= 0x01;
816 modem_ctl[1] |= 0x40;
817 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
820 dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
821 __func__, modem_ctl[0], modem_ctl[1],
822 modem_ctl[2], modem_ctl[3]);
823 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
828 static int cp210x_tiocmset(struct tty_struct *tty,
829 unsigned int set, unsigned int clear)
831 struct usb_serial_port *port = tty->driver_data;
832 return cp210x_tiocmset_port(port, set, clear);
835 static int cp210x_tiocmset_port(struct usb_serial_port *port,
836 unsigned int set, unsigned int clear)
838 unsigned int control = 0;
840 if (set & TIOCM_RTS) {
841 control |= CONTROL_RTS;
842 control |= CONTROL_WRITE_RTS;
844 if (set & TIOCM_DTR) {
845 control |= CONTROL_DTR;
846 control |= CONTROL_WRITE_DTR;
848 if (clear & TIOCM_RTS) {
849 control &= ~CONTROL_RTS;
850 control |= CONTROL_WRITE_RTS;
852 if (clear & TIOCM_DTR) {
853 control &= ~CONTROL_DTR;
854 control |= CONTROL_WRITE_DTR;
857 dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control);
859 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
862 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
865 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
867 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
870 static int cp210x_tiocmget(struct tty_struct *tty)
872 struct usb_serial_port *port = tty->driver_data;
873 unsigned int control;
876 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
878 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
879 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
880 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
881 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
882 |((control & CONTROL_RING)? TIOCM_RI : 0)
883 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
885 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control);
890 static void cp210x_break_ctl(struct tty_struct *tty, int break_state)
892 struct usb_serial_port *port = tty->driver_data;
895 if (break_state == 0)
899 dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
900 state == BREAK_OFF ? "off" : "on");
901 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
904 static int cp210x_startup(struct usb_serial *serial)
906 struct usb_host_interface *cur_altsetting;
907 struct cp210x_serial_private *spriv;
909 /* cp210x buffers behave strangely unless device is reset */
910 usb_reset_device(serial->dev);
912 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
916 cur_altsetting = serial->interface->cur_altsetting;
917 spriv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber;
919 usb_set_serial_data(serial, spriv);
924 static void cp210x_release(struct usb_serial *serial)
926 struct cp210x_serial_private *spriv;
928 spriv = usb_get_serial_data(serial);
932 module_usb_serial_driver(serial_drivers, id_table);
934 MODULE_DESCRIPTION(DRIVER_DESC);
935 MODULE_LICENSE("GPL");