Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
4cc27bd6 | 2 | * Silicon Laboratories CP210x USB to RS232 serial adaptor driver |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk) | |
5 | * | |
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. | |
9 | * | |
39a66b8d CS |
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 | |
13 | * | |
1da177e4 LT |
14 | */ |
15 | ||
1da177e4 LT |
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> | |
ff7eb602 | 24 | #include <linux/uaccess.h> |
a969888c | 25 | #include <linux/usb/serial.h> |
1da177e4 LT |
26 | |
27 | /* | |
28 | * Version Information | |
29 | */ | |
93ef1f1f | 30 | #define DRIVER_VERSION "v0.09" |
4cc27bd6 | 31 | #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver" |
1da177e4 LT |
32 | |
33 | /* | |
34 | * Function Prototypes | |
35 | */ | |
a509a7e4 | 36 | static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *); |
4cc27bd6 CS |
37 | static void cp210x_close(struct usb_serial_port *); |
38 | static void cp210x_get_termios(struct tty_struct *, | |
d2ad67b3 | 39 | struct usb_serial_port *port); |
4cc27bd6 | 40 | static void cp210x_get_termios_port(struct usb_serial_port *port, |
d2ad67b3 | 41 | unsigned int *cflagp, unsigned int *baudp); |
4cc27bd6 | 42 | static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *, |
95da310e | 43 | struct ktermios*); |
4cc27bd6 CS |
44 | static int cp210x_tiocmget(struct tty_struct *, struct file *); |
45 | static int cp210x_tiocmset(struct tty_struct *, struct file *, | |
39a66b8d | 46 | unsigned int, unsigned int); |
4cc27bd6 | 47 | static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *, |
d2ad67b3 | 48 | unsigned int, unsigned int); |
4cc27bd6 CS |
49 | static void cp210x_break_ctl(struct tty_struct *, int); |
50 | static int cp210x_startup(struct usb_serial *); | |
d94c7bd4 AC |
51 | static void cp210x_dtr_rts(struct usb_serial_port *p, int on); |
52 | static int cp210x_carrier_raised(struct usb_serial_port *p); | |
1da177e4 | 53 | |
1da177e4 LT |
54 | static int debug; |
55 | ||
7d40d7e8 | 56 | static const struct usb_device_id id_table[] = { |
5091b587 | 57 | { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */ |
59fba744 | 58 | { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ |
b7c7cbc8 | 59 | { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */ |
1f4f714f | 60 | { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ |
b7c7cbc8 | 61 | { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */ |
eefd9029 CS |
62 | { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */ |
63 | { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */ | |
198b9517 | 64 | { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ |
014840ec | 65 | { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ |
59fba744 | 66 | { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ |
198b9517 | 67 | { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ |
e988fc8a CS |
68 | { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ |
69 | { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ | |
b7c7cbc8 | 70 | { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */ |
0601e116 AK |
71 | { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */ |
72 | { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */ | |
5de8b3ac | 73 | { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */ |
59224f53 | 74 | { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ |
eefd9029 CS |
75 | { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */ |
76 | { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */ | |
92f5cae2 | 77 | { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ |
9a18e75f | 78 | { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ |
212a4b4e | 79 | { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ |
eefd9029 | 80 | { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */ |
e988fc8a CS |
81 | { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ |
82 | { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ | |
92f5cae2 | 83 | { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ |
e988fc8a | 84 | { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ |
ba0f332c | 85 | { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ |
e988fc8a | 86 | { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ |
8bf16ba7 | 87 | { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ |
eefd9029 | 88 | { USB_DEVICE(0x10C4, 0x8149) }, /* West Mountain Radio Computerized Battery Analyzer */ |
fc4bd64c JH |
89 | { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ |
90 | { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ | |
e988fc8a | 91 | { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ |
eefd9029 | 92 | { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */ |
c6535668 | 93 | { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ |
96623697 | 94 | { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ |
59fba744 | 95 | { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ |
eefd9029 | 96 | { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */ |
78001e3d BS |
97 | { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ |
98 | { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ | |
8be27c2d | 99 | { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */ |
bd07c551 | 100 | { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */ |
b7c7cbc8 | 101 | { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */ |
78001e3d | 102 | { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ |
877e262c | 103 | { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ |
95bec45d | 104 | { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */ |
bd07c551 | 105 | { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesys ETRX2USB */ |
b7c7cbc8 | 106 | { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ |
ba0f332c | 107 | { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ |
8bf16ba7 | 108 | { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ |
881e3c98 | 109 | { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ |
8bf16ba7 | 110 | { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ |
d23bac9f | 111 | { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ |
541e05ec | 112 | { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */ |
e988fc8a | 113 | { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ |
61926b97 | 114 | { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ |
eefd9029 | 115 | { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ |
5de8b3ac CS |
116 | { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ |
117 | { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ | |
118 | { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ | |
119 | { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ | |
ebaf494e | 120 | { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ |
b7c7cbc8 | 121 | { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ |
e05998d5 | 122 | { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ |
b7c7cbc8 | 123 | { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ |
5de8b3ac | 124 | { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ |
b0ce84d5 | 125 | { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ |
356c5a48 AIB |
126 | { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ |
127 | { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ | |
128 | { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ | |
129 | { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ | |
541e05ec CS |
130 | { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ |
131 | { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ | |
132 | { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ | |
133 | { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ | |
39a66b8d | 134 | { } /* Terminating Entry */ |
1da177e4 LT |
135 | }; |
136 | ||
ff7eb602 | 137 | MODULE_DEVICE_TABLE(usb, id_table); |
1da177e4 | 138 | |
4cc27bd6 CS |
139 | static struct usb_driver cp210x_driver = { |
140 | .name = "cp210x", | |
1da177e4 LT |
141 | .probe = usb_serial_probe, |
142 | .disconnect = usb_serial_disconnect, | |
143 | .id_table = id_table, | |
ba9dc657 | 144 | .no_dynamic_id = 1, |
1da177e4 LT |
145 | }; |
146 | ||
4cc27bd6 | 147 | static struct usb_serial_driver cp210x_device = { |
18fcac35 GKH |
148 | .driver = { |
149 | .owner = THIS_MODULE, | |
4cc27bd6 | 150 | .name = "cp210x", |
18fcac35 | 151 | }, |
4cc27bd6 | 152 | .usb_driver = &cp210x_driver, |
1da177e4 | 153 | .id_table = id_table, |
1da177e4 | 154 | .num_ports = 1, |
aea006b9 | 155 | .bulk_in_size = 256, |
d4e598f6 | 156 | .bulk_out_size = 256, |
4cc27bd6 CS |
157 | .open = cp210x_open, |
158 | .close = cp210x_close, | |
159 | .break_ctl = cp210x_break_ctl, | |
160 | .set_termios = cp210x_set_termios, | |
161 | .tiocmget = cp210x_tiocmget, | |
162 | .tiocmset = cp210x_tiocmset, | |
163 | .attach = cp210x_startup, | |
d94c7bd4 AC |
164 | .dtr_rts = cp210x_dtr_rts, |
165 | .carrier_raised = cp210x_carrier_raised | |
1da177e4 LT |
166 | }; |
167 | ||
39a66b8d | 168 | /* Config request types */ |
1da177e4 LT |
169 | #define REQTYPE_HOST_TO_DEVICE 0x41 |
170 | #define REQTYPE_DEVICE_TO_HOST 0xc1 | |
171 | ||
93ef1f1f CS |
172 | /* Config request codes */ |
173 | #define CP210X_IFC_ENABLE 0x00 | |
174 | #define CP210X_SET_BAUDDIV 0x01 | |
175 | #define CP210X_GET_BAUDDIV 0x02 | |
176 | #define CP210X_SET_LINE_CTL 0x03 | |
177 | #define CP210X_GET_LINE_CTL 0x04 | |
178 | #define CP210X_SET_BREAK 0x05 | |
179 | #define CP210X_IMM_CHAR 0x06 | |
180 | #define CP210X_SET_MHS 0x07 | |
181 | #define CP210X_GET_MDMSTS 0x08 | |
182 | #define CP210X_SET_XON 0x09 | |
183 | #define CP210X_SET_XOFF 0x0A | |
184 | #define CP210X_SET_EVENTMASK 0x0B | |
185 | #define CP210X_GET_EVENTMASK 0x0C | |
186 | #define CP210X_SET_CHAR 0x0D | |
187 | #define CP210X_GET_CHARS 0x0E | |
188 | #define CP210X_GET_PROPS 0x0F | |
189 | #define CP210X_GET_COMM_STATUS 0x10 | |
190 | #define CP210X_RESET 0x11 | |
191 | #define CP210X_PURGE 0x12 | |
192 | #define CP210X_SET_FLOW 0x13 | |
193 | #define CP210X_GET_FLOW 0x14 | |
194 | #define CP210X_EMBED_EVENTS 0x15 | |
195 | #define CP210X_GET_EVENTSTATE 0x16 | |
196 | #define CP210X_SET_CHARS 0x19 | |
197 | ||
198 | /* CP210X_IFC_ENABLE */ | |
1da177e4 LT |
199 | #define UART_ENABLE 0x0001 |
200 | #define UART_DISABLE 0x0000 | |
201 | ||
93ef1f1f | 202 | /* CP210X_(SET|GET)_BAUDDIV */ |
1da177e4 LT |
203 | #define BAUD_RATE_GEN_FREQ 0x384000 |
204 | ||
93ef1f1f | 205 | /* CP210X_(SET|GET)_LINE_CTL */ |
1da177e4 | 206 | #define BITS_DATA_MASK 0X0f00 |
39a66b8d | 207 | #define BITS_DATA_5 0X0500 |
1da177e4 LT |
208 | #define BITS_DATA_6 0X0600 |
209 | #define BITS_DATA_7 0X0700 | |
210 | #define BITS_DATA_8 0X0800 | |
211 | #define BITS_DATA_9 0X0900 | |
212 | ||
213 | #define BITS_PARITY_MASK 0x00f0 | |
214 | #define BITS_PARITY_NONE 0x0000 | |
215 | #define BITS_PARITY_ODD 0x0010 | |
216 | #define BITS_PARITY_EVEN 0x0020 | |
217 | #define BITS_PARITY_MARK 0x0030 | |
218 | #define BITS_PARITY_SPACE 0x0040 | |
219 | ||
220 | #define BITS_STOP_MASK 0x000f | |
221 | #define BITS_STOP_1 0x0000 | |
222 | #define BITS_STOP_1_5 0x0001 | |
223 | #define BITS_STOP_2 0x0002 | |
39a66b8d | 224 | |
93ef1f1f | 225 | /* CP210X_SET_BREAK */ |
72916791 CS |
226 | #define BREAK_ON 0x0001 |
227 | #define BREAK_OFF 0x0000 | |
1da177e4 | 228 | |
93ef1f1f | 229 | /* CP210X_(SET_MHS|GET_MDMSTS) */ |
39a66b8d CS |
230 | #define CONTROL_DTR 0x0001 |
231 | #define CONTROL_RTS 0x0002 | |
232 | #define CONTROL_CTS 0x0010 | |
233 | #define CONTROL_DSR 0x0020 | |
234 | #define CONTROL_RING 0x0040 | |
235 | #define CONTROL_DCD 0x0080 | |
236 | #define CONTROL_WRITE_DTR 0x0100 | |
237 | #define CONTROL_WRITE_RTS 0x0200 | |
1da177e4 | 238 | |
39a66b8d | 239 | /* |
4cc27bd6 CS |
240 | * cp210x_get_config |
241 | * Reads from the CP210x configuration registers | |
39a66b8d CS |
242 | * 'size' is specified in bytes. |
243 | * 'data' is a pointer to a pre-allocated array of integers large | |
244 | * enough to hold 'size' bytes (with 4 bytes to each integer) | |
245 | */ | |
4cc27bd6 | 246 | static int cp210x_get_config(struct usb_serial_port *port, u8 request, |
39a66b8d | 247 | unsigned int *data, int size) |
1da177e4 LT |
248 | { |
249 | struct usb_serial *serial = port->serial; | |
53ebb3b8 | 250 | __le32 *buf; |
39a66b8d CS |
251 | int result, i, length; |
252 | ||
253 | /* Number of integers required to contain the array */ | |
254 | length = (((size - 1) | 3) + 1)/4; | |
255 | ||
53ebb3b8 | 256 | buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); |
39a66b8d | 257 | if (!buf) { |
441b62c1 | 258 | dev_err(&port->dev, "%s - out of memory.\n", __func__); |
39a66b8d CS |
259 | return -ENOMEM; |
260 | } | |
1da177e4 | 261 | |
39a66b8d | 262 | /* Issue the request, attempting to read 'size' bytes */ |
ff7eb602 | 263 | result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
1da177e4 | 264 | request, REQTYPE_DEVICE_TO_HOST, 0x0000, |
39a66b8d | 265 | 0, buf, size, 300); |
1da177e4 | 266 | |
39a66b8d | 267 | /* Convert data into an array of integers */ |
ff7eb602 | 268 | for (i = 0; i < length; i++) |
39a66b8d | 269 | data[i] = le32_to_cpu(buf[i]); |
1da177e4 | 270 | |
39a66b8d | 271 | kfree(buf); |
1da177e4 | 272 | |
39a66b8d | 273 | if (result != size) { |
97324955 | 274 | dbg("%s - Unable to send config request, " |
39a66b8d | 275 | "request=0x%x size=%d result=%d\n", |
441b62c1 | 276 | __func__, request, size, result); |
39a66b8d CS |
277 | return -EPROTO; |
278 | } | |
1da177e4 | 279 | |
39a66b8d | 280 | return 0; |
1da177e4 LT |
281 | } |
282 | ||
39a66b8d | 283 | /* |
4cc27bd6 CS |
284 | * cp210x_set_config |
285 | * Writes to the CP210x configuration registers | |
39a66b8d CS |
286 | * Values less than 16 bits wide are sent directly |
287 | * 'size' is specified in bytes. | |
288 | */ | |
4cc27bd6 | 289 | static int cp210x_set_config(struct usb_serial_port *port, u8 request, |
39a66b8d | 290 | unsigned int *data, int size) |
1da177e4 LT |
291 | { |
292 | struct usb_serial *serial = port->serial; | |
53ebb3b8 | 293 | __le32 *buf; |
39a66b8d | 294 | int result, i, length; |
1da177e4 | 295 | |
39a66b8d CS |
296 | /* Number of integers required to contain the array */ |
297 | length = (((size - 1) | 3) + 1)/4; | |
298 | ||
53ebb3b8 | 299 | buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); |
39a66b8d CS |
300 | if (!buf) { |
301 | dev_err(&port->dev, "%s - out of memory.\n", | |
441b62c1 | 302 | __func__); |
39a66b8d CS |
303 | return -ENOMEM; |
304 | } | |
305 | ||
306 | /* Array of integers into bytes */ | |
307 | for (i = 0; i < length; i++) | |
308 | buf[i] = cpu_to_le32(data[i]); | |
309 | ||
310 | if (size > 2) { | |
ff7eb602 | 311 | result = usb_control_msg(serial->dev, |
39a66b8d CS |
312 | usb_sndctrlpipe(serial->dev, 0), |
313 | request, REQTYPE_HOST_TO_DEVICE, 0x0000, | |
314 | 0, buf, size, 300); | |
315 | } else { | |
ff7eb602 | 316 | result = usb_control_msg(serial->dev, |
39a66b8d CS |
317 | usb_sndctrlpipe(serial->dev, 0), |
318 | request, REQTYPE_HOST_TO_DEVICE, data[0], | |
319 | 0, NULL, 0, 300); | |
1da177e4 LT |
320 | } |
321 | ||
39a66b8d CS |
322 | kfree(buf); |
323 | ||
324 | if ((size > 2 && result != size) || result < 0) { | |
97324955 | 325 | dbg("%s - Unable to send request, " |
39a66b8d | 326 | "request=0x%x size=%d result=%d\n", |
441b62c1 | 327 | __func__, request, size, result); |
39a66b8d CS |
328 | return -EPROTO; |
329 | } | |
1da177e4 LT |
330 | |
331 | return 0; | |
332 | } | |
333 | ||
39a66b8d | 334 | /* |
4cc27bd6 CS |
335 | * cp210x_set_config_single |
336 | * Convenience function for calling cp210x_set_config on single data values | |
39a66b8d CS |
337 | * without requiring an integer pointer |
338 | */ | |
4cc27bd6 | 339 | static inline int cp210x_set_config_single(struct usb_serial_port *port, |
39a66b8d CS |
340 | u8 request, unsigned int data) |
341 | { | |
4cc27bd6 | 342 | return cp210x_set_config(port, request, &data, 2); |
39a66b8d CS |
343 | } |
344 | ||
ef8b6bcb | 345 | /* |
4cc27bd6 | 346 | * cp210x_quantise_baudrate |
ef8b6bcb CS |
347 | * Quantises the baud rate as per AN205 Table 1 |
348 | */ | |
4cc27bd6 | 349 | static unsigned int cp210x_quantise_baudrate(unsigned int baud) { |
ef8b6bcb CS |
350 | if (baud <= 56) baud = 0; |
351 | else if (baud <= 300) baud = 300; | |
352 | else if (baud <= 600) baud = 600; | |
353 | else if (baud <= 1200) baud = 1200; | |
354 | else if (baud <= 1800) baud = 1800; | |
355 | else if (baud <= 2400) baud = 2400; | |
356 | else if (baud <= 4000) baud = 4000; | |
357 | else if (baud <= 4803) baud = 4800; | |
358 | else if (baud <= 7207) baud = 7200; | |
359 | else if (baud <= 9612) baud = 9600; | |
360 | else if (baud <= 14428) baud = 14400; | |
361 | else if (baud <= 16062) baud = 16000; | |
362 | else if (baud <= 19250) baud = 19200; | |
363 | else if (baud <= 28912) baud = 28800; | |
364 | else if (baud <= 38601) baud = 38400; | |
365 | else if (baud <= 51558) baud = 51200; | |
366 | else if (baud <= 56280) baud = 56000; | |
367 | else if (baud <= 58053) baud = 57600; | |
368 | else if (baud <= 64111) baud = 64000; | |
369 | else if (baud <= 77608) baud = 76800; | |
370 | else if (baud <= 117028) baud = 115200; | |
371 | else if (baud <= 129347) baud = 128000; | |
372 | else if (baud <= 156868) baud = 153600; | |
373 | else if (baud <= 237832) baud = 230400; | |
374 | else if (baud <= 254234) baud = 250000; | |
375 | else if (baud <= 273066) baud = 256000; | |
376 | else if (baud <= 491520) baud = 460800; | |
377 | else if (baud <= 567138) baud = 500000; | |
378 | else if (baud <= 670254) baud = 576000; | |
379 | else if (baud <= 1053257) baud = 921600; | |
380 | else if (baud <= 1474560) baud = 1228800; | |
381 | else if (baud <= 2457600) baud = 1843200; | |
382 | else baud = 3686400; | |
383 | return baud; | |
384 | } | |
385 | ||
a509a7e4 | 386 | static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 | 387 | { |
1da177e4 LT |
388 | int result; |
389 | ||
441b62c1 | 390 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 391 | |
4cc27bd6 | 392 | if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) { |
1da177e4 | 393 | dev_err(&port->dev, "%s - Unable to enable UART\n", |
441b62c1 | 394 | __func__); |
1da177e4 LT |
395 | return -EPROTO; |
396 | } | |
397 | ||
a9013176 | 398 | result = usb_serial_generic_open(tty, port); |
2db6c769 | 399 | if (result) |
1da177e4 | 400 | return result; |
1da177e4 | 401 | |
39a66b8d | 402 | /* Configure the termios structure */ |
4cc27bd6 | 403 | cp210x_get_termios(tty, port); |
1da177e4 LT |
404 | return 0; |
405 | } | |
406 | ||
4cc27bd6 | 407 | static void cp210x_close(struct usb_serial_port *port) |
1da177e4 | 408 | { |
441b62c1 | 409 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 410 | |
f26788da | 411 | usb_serial_generic_close(port); |
1da177e4 | 412 | |
95bef012 ON |
413 | mutex_lock(&port->serial->disc_mutex); |
414 | if (!port->serial->disconnected) | |
4cc27bd6 | 415 | cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); |
95bef012 | 416 | mutex_unlock(&port->serial->disc_mutex); |
1da177e4 LT |
417 | } |
418 | ||
39a66b8d | 419 | /* |
4cc27bd6 | 420 | * cp210x_get_termios |
39a66b8d CS |
421 | * Reads the baud rate, data bits, parity, stop bits and flow control mode |
422 | * from the device, corrects any unsupported values, and configures the | |
423 | * termios structure to reflect the state of the device | |
424 | */ | |
4cc27bd6 | 425 | static void cp210x_get_termios(struct tty_struct *tty, |
d2ad67b3 V |
426 | struct usb_serial_port *port) |
427 | { | |
428 | unsigned int baud; | |
429 | ||
430 | if (tty) { | |
4cc27bd6 | 431 | cp210x_get_termios_port(tty->driver_data, |
d2ad67b3 V |
432 | &tty->termios->c_cflag, &baud); |
433 | tty_encode_baud_rate(tty, baud, baud); | |
434 | } | |
435 | ||
436 | else { | |
437 | unsigned int cflag; | |
438 | cflag = 0; | |
4cc27bd6 | 439 | cp210x_get_termios_port(port, &cflag, &baud); |
d2ad67b3 V |
440 | } |
441 | } | |
442 | ||
443 | /* | |
4cc27bd6 CS |
444 | * cp210x_get_termios_port |
445 | * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. | |
d2ad67b3 | 446 | */ |
4cc27bd6 | 447 | static void cp210x_get_termios_port(struct usb_serial_port *port, |
d2ad67b3 | 448 | unsigned int *cflagp, unsigned int *baudp) |
1da177e4 | 449 | { |
39a66b8d | 450 | unsigned int cflag, modem_ctl[4]; |
b2bdd1f5 HH |
451 | unsigned int baud; |
452 | unsigned int bits; | |
1da177e4 | 453 | |
441b62c1 | 454 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 455 | |
4cc27bd6 | 456 | cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2); |
39a66b8d | 457 | /* Convert to baudrate */ |
1da177e4 | 458 | if (baud) |
4cc27bd6 | 459 | baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); |
1da177e4 | 460 | |
441b62c1 | 461 | dbg("%s - baud rate = %d", __func__, baud); |
d2ad67b3 | 462 | *baudp = baud; |
9ab0f202 | 463 | |
d2ad67b3 | 464 | cflag = *cflagp; |
1da177e4 | 465 | |
4cc27bd6 | 466 | cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); |
1da177e4 | 467 | cflag &= ~CSIZE; |
ff7eb602 AC |
468 | switch (bits & BITS_DATA_MASK) { |
469 | case BITS_DATA_5: | |
470 | dbg("%s - data bits = 5", __func__); | |
471 | cflag |= CS5; | |
472 | break; | |
473 | case BITS_DATA_6: | |
474 | dbg("%s - data bits = 6", __func__); | |
475 | cflag |= CS6; | |
476 | break; | |
477 | case BITS_DATA_7: | |
478 | dbg("%s - data bits = 7", __func__); | |
479 | cflag |= CS7; | |
480 | break; | |
481 | case BITS_DATA_8: | |
482 | dbg("%s - data bits = 8", __func__); | |
483 | cflag |= CS8; | |
484 | break; | |
485 | case BITS_DATA_9: | |
486 | dbg("%s - data bits = 9 (not supported, using 8 data bits)", | |
487 | __func__); | |
488 | cflag |= CS8; | |
489 | bits &= ~BITS_DATA_MASK; | |
490 | bits |= BITS_DATA_8; | |
4cc27bd6 | 491 | cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
ff7eb602 AC |
492 | break; |
493 | default: | |
494 | dbg("%s - Unknown number of data bits, using 8", __func__); | |
495 | cflag |= CS8; | |
496 | bits &= ~BITS_DATA_MASK; | |
497 | bits |= BITS_DATA_8; | |
4cc27bd6 | 498 | cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
ff7eb602 | 499 | break; |
1da177e4 LT |
500 | } |
501 | ||
ff7eb602 AC |
502 | switch (bits & BITS_PARITY_MASK) { |
503 | case BITS_PARITY_NONE: | |
504 | dbg("%s - parity = NONE", __func__); | |
505 | cflag &= ~PARENB; | |
506 | break; | |
507 | case BITS_PARITY_ODD: | |
508 | dbg("%s - parity = ODD", __func__); | |
509 | cflag |= (PARENB|PARODD); | |
510 | break; | |
511 | case BITS_PARITY_EVEN: | |
512 | dbg("%s - parity = EVEN", __func__); | |
513 | cflag &= ~PARODD; | |
514 | cflag |= PARENB; | |
515 | break; | |
516 | case BITS_PARITY_MARK: | |
517 | dbg("%s - parity = MARK (not supported, disabling parity)", | |
518 | __func__); | |
519 | cflag &= ~PARENB; | |
520 | bits &= ~BITS_PARITY_MASK; | |
4cc27bd6 | 521 | cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
ff7eb602 AC |
522 | break; |
523 | case BITS_PARITY_SPACE: | |
524 | dbg("%s - parity = SPACE (not supported, disabling parity)", | |
525 | __func__); | |
526 | cflag &= ~PARENB; | |
527 | bits &= ~BITS_PARITY_MASK; | |
4cc27bd6 | 528 | cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
ff7eb602 AC |
529 | break; |
530 | default: | |
531 | dbg("%s - Unknown parity mode, disabling parity", __func__); | |
532 | cflag &= ~PARENB; | |
533 | bits &= ~BITS_PARITY_MASK; | |
4cc27bd6 | 534 | cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
ff7eb602 | 535 | break; |
1da177e4 LT |
536 | } |
537 | ||
538 | cflag &= ~CSTOPB; | |
ff7eb602 AC |
539 | switch (bits & BITS_STOP_MASK) { |
540 | case BITS_STOP_1: | |
541 | dbg("%s - stop bits = 1", __func__); | |
542 | break; | |
543 | case BITS_STOP_1_5: | |
544 | dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", | |
545 | __func__); | |
546 | bits &= ~BITS_STOP_MASK; | |
4cc27bd6 | 547 | cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
ff7eb602 AC |
548 | break; |
549 | case BITS_STOP_2: | |
550 | dbg("%s - stop bits = 2", __func__); | |
551 | cflag |= CSTOPB; | |
552 | break; | |
553 | default: | |
554 | dbg("%s - Unknown number of stop bits, using 1 stop bit", | |
555 | __func__); | |
556 | bits &= ~BITS_STOP_MASK; | |
4cc27bd6 | 557 | cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
ff7eb602 | 558 | break; |
1da177e4 LT |
559 | } |
560 | ||
4cc27bd6 | 561 | cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); |
39a66b8d | 562 | if (modem_ctl[0] & 0x0008) { |
441b62c1 | 563 | dbg("%s - flow control = CRTSCTS", __func__); |
39a66b8d CS |
564 | cflag |= CRTSCTS; |
565 | } else { | |
441b62c1 | 566 | dbg("%s - flow control = NONE", __func__); |
39a66b8d CS |
567 | cflag &= ~CRTSCTS; |
568 | } | |
569 | ||
d2ad67b3 | 570 | *cflagp = cflag; |
1da177e4 LT |
571 | } |
572 | ||
4cc27bd6 | 573 | static void cp210x_set_termios(struct tty_struct *tty, |
95da310e | 574 | struct usb_serial_port *port, struct ktermios *old_termios) |
1da177e4 | 575 | { |
9ab0f202 | 576 | unsigned int cflag, old_cflag; |
b2bdd1f5 | 577 | unsigned int baud = 0, bits; |
39a66b8d | 578 | unsigned int modem_ctl[4]; |
1da177e4 | 579 | |
441b62c1 | 580 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 581 | |
95da310e | 582 | if (!tty) |
1da177e4 | 583 | return; |
9ab0f202 | 584 | |
95da310e AC |
585 | tty->termios->c_cflag &= ~CMSPAR; |
586 | cflag = tty->termios->c_cflag; | |
01e96d28 | 587 | old_cflag = old_termios->c_cflag; |
4cc27bd6 | 588 | baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty)); |
1da177e4 LT |
589 | |
590 | /* If the baud rate is to be updated*/ | |
ef8b6bcb CS |
591 | if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { |
592 | dbg("%s - Setting baud rate to %d baud", __func__, | |
593 | baud); | |
4cc27bd6 | 594 | if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV, |
ef8b6bcb | 595 | ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { |
759f3634 | 596 | dbg("Baud rate requested not supported by device"); |
ef8b6bcb | 597 | baud = tty_termios_baud_rate(old_termios); |
1da177e4 LT |
598 | } |
599 | } | |
9ab0f202 | 600 | /* Report back the resulting baud rate */ |
95da310e | 601 | tty_encode_baud_rate(tty, baud, baud); |
1da177e4 | 602 | |
39a66b8d | 603 | /* If the number of data bits is to be updated */ |
1da177e4 | 604 | if ((cflag & CSIZE) != (old_cflag & CSIZE)) { |
4cc27bd6 | 605 | cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); |
1da177e4 LT |
606 | bits &= ~BITS_DATA_MASK; |
607 | switch (cflag & CSIZE) { | |
ff7eb602 AC |
608 | case CS5: |
609 | bits |= BITS_DATA_5; | |
610 | dbg("%s - data bits = 5", __func__); | |
611 | break; | |
612 | case CS6: | |
613 | bits |= BITS_DATA_6; | |
614 | dbg("%s - data bits = 6", __func__); | |
615 | break; | |
616 | case CS7: | |
617 | bits |= BITS_DATA_7; | |
618 | dbg("%s - data bits = 7", __func__); | |
619 | break; | |
620 | case CS8: | |
621 | bits |= BITS_DATA_8; | |
622 | dbg("%s - data bits = 8", __func__); | |
623 | break; | |
624 | /*case CS9: | |
625 | bits |= BITS_DATA_9; | |
626 | dbg("%s - data bits = 9", __func__); | |
627 | break;*/ | |
628 | default: | |
4cc27bd6 | 629 | dbg("cp210x driver does not " |
1da177e4 LT |
630 | "support the number of bits requested," |
631 | " using 8 bit mode\n"); | |
632 | bits |= BITS_DATA_8; | |
633 | break; | |
634 | } | |
4cc27bd6 | 635 | if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) |
97324955 | 636 | dbg("Number of data bits requested " |
1da177e4 LT |
637 | "not supported by device\n"); |
638 | } | |
639 | ||
640 | if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { | |
4cc27bd6 | 641 | cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); |
1da177e4 LT |
642 | bits &= ~BITS_PARITY_MASK; |
643 | if (cflag & PARENB) { | |
644 | if (cflag & PARODD) { | |
645 | bits |= BITS_PARITY_ODD; | |
441b62c1 | 646 | dbg("%s - parity = ODD", __func__); |
1da177e4 LT |
647 | } else { |
648 | bits |= BITS_PARITY_EVEN; | |
441b62c1 | 649 | dbg("%s - parity = EVEN", __func__); |
1da177e4 LT |
650 | } |
651 | } | |
4cc27bd6 | 652 | if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) |
97324955 | 653 | dbg("Parity mode not supported " |
1da177e4 LT |
654 | "by device\n"); |
655 | } | |
656 | ||
657 | if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { | |
4cc27bd6 | 658 | cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); |
1da177e4 LT |
659 | bits &= ~BITS_STOP_MASK; |
660 | if (cflag & CSTOPB) { | |
661 | bits |= BITS_STOP_2; | |
441b62c1 | 662 | dbg("%s - stop bits = 2", __func__); |
1da177e4 LT |
663 | } else { |
664 | bits |= BITS_STOP_1; | |
441b62c1 | 665 | dbg("%s - stop bits = 1", __func__); |
1da177e4 | 666 | } |
4cc27bd6 | 667 | if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) |
97324955 | 668 | dbg("Number of stop bits requested " |
1da177e4 LT |
669 | "not supported by device\n"); |
670 | } | |
39a66b8d CS |
671 | |
672 | if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { | |
4cc27bd6 | 673 | cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); |
39a66b8d | 674 | dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", |
441b62c1 | 675 | __func__, modem_ctl[0], modem_ctl[1], |
39a66b8d CS |
676 | modem_ctl[2], modem_ctl[3]); |
677 | ||
678 | if (cflag & CRTSCTS) { | |
679 | modem_ctl[0] &= ~0x7B; | |
680 | modem_ctl[0] |= 0x09; | |
681 | modem_ctl[1] = 0x80; | |
441b62c1 | 682 | dbg("%s - flow control = CRTSCTS", __func__); |
39a66b8d CS |
683 | } else { |
684 | modem_ctl[0] &= ~0x7B; | |
685 | modem_ctl[0] |= 0x01; | |
686 | modem_ctl[1] |= 0x40; | |
441b62c1 | 687 | dbg("%s - flow control = NONE", __func__); |
39a66b8d CS |
688 | } |
689 | ||
690 | dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", | |
441b62c1 | 691 | __func__, modem_ctl[0], modem_ctl[1], |
39a66b8d | 692 | modem_ctl[2], modem_ctl[3]); |
4cc27bd6 | 693 | cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); |
39a66b8d CS |
694 | } |
695 | ||
696 | } | |
697 | ||
4cc27bd6 | 698 | static int cp210x_tiocmset (struct tty_struct *tty, struct file *file, |
39a66b8d CS |
699 | unsigned int set, unsigned int clear) |
700 | { | |
95da310e | 701 | struct usb_serial_port *port = tty->driver_data; |
4cc27bd6 | 702 | return cp210x_tiocmset_port(port, file, set, clear); |
d2ad67b3 V |
703 | } |
704 | ||
4cc27bd6 | 705 | static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file, |
d2ad67b3 V |
706 | unsigned int set, unsigned int clear) |
707 | { | |
b2bdd1f5 | 708 | unsigned int control = 0; |
39a66b8d | 709 | |
441b62c1 | 710 | dbg("%s - port %d", __func__, port->number); |
39a66b8d CS |
711 | |
712 | if (set & TIOCM_RTS) { | |
713 | control |= CONTROL_RTS; | |
714 | control |= CONTROL_WRITE_RTS; | |
715 | } | |
716 | if (set & TIOCM_DTR) { | |
717 | control |= CONTROL_DTR; | |
718 | control |= CONTROL_WRITE_DTR; | |
719 | } | |
720 | if (clear & TIOCM_RTS) { | |
721 | control &= ~CONTROL_RTS; | |
722 | control |= CONTROL_WRITE_RTS; | |
723 | } | |
724 | if (clear & TIOCM_DTR) { | |
725 | control &= ~CONTROL_DTR; | |
726 | control |= CONTROL_WRITE_DTR; | |
727 | } | |
728 | ||
441b62c1 | 729 | dbg("%s - control = 0x%.4x", __func__, control); |
39a66b8d | 730 | |
4cc27bd6 | 731 | return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); |
39a66b8d CS |
732 | } |
733 | ||
d94c7bd4 AC |
734 | static void cp210x_dtr_rts(struct usb_serial_port *p, int on) |
735 | { | |
736 | if (on) | |
737 | cp210x_tiocmset_port(p, NULL, TIOCM_DTR|TIOCM_RTS, 0); | |
738 | else | |
739 | cp210x_tiocmset_port(p, NULL, 0, TIOCM_DTR|TIOCM_RTS); | |
740 | } | |
741 | ||
4cc27bd6 | 742 | static int cp210x_tiocmget (struct tty_struct *tty, struct file *file) |
39a66b8d | 743 | { |
95da310e | 744 | struct usb_serial_port *port = tty->driver_data; |
b2bdd1f5 HH |
745 | unsigned int control; |
746 | int result; | |
39a66b8d | 747 | |
441b62c1 | 748 | dbg("%s - port %d", __func__, port->number); |
39a66b8d | 749 | |
4cc27bd6 | 750 | cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); |
39a66b8d CS |
751 | |
752 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
753 | |((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
754 | |((control & CONTROL_CTS) ? TIOCM_CTS : 0) | |
755 | |((control & CONTROL_DSR) ? TIOCM_DSR : 0) | |
756 | |((control & CONTROL_RING)? TIOCM_RI : 0) | |
757 | |((control & CONTROL_DCD) ? TIOCM_CD : 0); | |
758 | ||
441b62c1 | 759 | dbg("%s - control = 0x%.2x", __func__, control); |
39a66b8d CS |
760 | |
761 | return result; | |
1da177e4 LT |
762 | } |
763 | ||
d94c7bd4 AC |
764 | static int cp210x_carrier_raised(struct usb_serial_port *p) |
765 | { | |
766 | unsigned int control; | |
767 | cp210x_get_config(p, CP210X_GET_MDMSTS, &control, 1); | |
768 | if (control & CONTROL_DCD) | |
769 | return 1; | |
770 | return 0; | |
771 | } | |
772 | ||
4cc27bd6 | 773 | static void cp210x_break_ctl (struct tty_struct *tty, int break_state) |
1da177e4 | 774 | { |
95da310e | 775 | struct usb_serial_port *port = tty->driver_data; |
b2bdd1f5 | 776 | unsigned int state; |
1da177e4 | 777 | |
441b62c1 | 778 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
779 | if (break_state == 0) |
780 | state = BREAK_OFF; | |
781 | else | |
782 | state = BREAK_ON; | |
441b62c1 | 783 | dbg("%s - turning break %s", __func__, |
ff7eb602 | 784 | state == BREAK_OFF ? "off" : "on"); |
4cc27bd6 | 785 | cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); |
1da177e4 LT |
786 | } |
787 | ||
4cc27bd6 | 788 | static int cp210x_startup(struct usb_serial *serial) |
1da177e4 | 789 | { |
4cc27bd6 | 790 | /* cp210x buffers behave strangely unless device is reset */ |
1da177e4 LT |
791 | usb_reset_device(serial->dev); |
792 | return 0; | |
793 | } | |
794 | ||
4cc27bd6 | 795 | static int __init cp210x_init(void) |
1da177e4 LT |
796 | { |
797 | int retval; | |
798 | ||
4cc27bd6 | 799 | retval = usb_serial_register(&cp210x_device); |
1da177e4 | 800 | if (retval) |
39a66b8d | 801 | return retval; /* Failed to register */ |
1da177e4 | 802 | |
4cc27bd6 | 803 | retval = usb_register(&cp210x_driver); |
1da177e4 | 804 | if (retval) { |
39a66b8d | 805 | /* Failed to register */ |
4cc27bd6 | 806 | usb_serial_deregister(&cp210x_device); |
1da177e4 LT |
807 | return retval; |
808 | } | |
809 | ||
39a66b8d | 810 | /* Success */ |
c197a8db GKH |
811 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
812 | DRIVER_DESC "\n"); | |
1da177e4 LT |
813 | return 0; |
814 | } | |
815 | ||
4cc27bd6 | 816 | static void __exit cp210x_exit(void) |
1da177e4 | 817 | { |
4cc27bd6 CS |
818 | usb_deregister(&cp210x_driver); |
819 | usb_serial_deregister(&cp210x_device); | |
1da177e4 LT |
820 | } |
821 | ||
4cc27bd6 CS |
822 | module_init(cp210x_init); |
823 | module_exit(cp210x_exit); | |
1da177e4 LT |
824 | |
825 | MODULE_DESCRIPTION(DRIVER_DESC); | |
826 | MODULE_VERSION(DRIVER_VERSION); | |
827 | MODULE_LICENSE("GPL"); | |
828 | ||
829 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
830 | MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); |