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[] = { |
2f1136d1 | 57 | { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */ |
5091b587 | 58 | { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */ |
59fba744 | 59 | { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ |
5b22a32e | 60 | { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ |
b7c7cbc8 | 61 | { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */ |
1f4f714f | 62 | { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ |
b7c7cbc8 | 63 | { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */ |
eefd9029 CS |
64 | { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */ |
65 | { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */ | |
198b9517 | 66 | { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ |
014840ec | 67 | { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ |
59fba744 | 68 | { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ |
198b9517 | 69 | { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ |
e988fc8a CS |
70 | { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ |
71 | { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ | |
b7c7cbc8 | 72 | { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */ |
0601e116 AK |
73 | { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */ |
74 | { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */ | |
5de8b3ac | 75 | { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */ |
59224f53 | 76 | { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ |
eefd9029 CS |
77 | { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */ |
78 | { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */ | |
92f5cae2 | 79 | { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ |
9a18e75f | 80 | { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ |
212a4b4e | 81 | { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ |
eefd9029 | 82 | { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */ |
e988fc8a CS |
83 | { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ |
84 | { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ | |
92f5cae2 | 85 | { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ |
e988fc8a | 86 | { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ |
ba0f332c | 87 | { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ |
e988fc8a | 88 | { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ |
8bf16ba7 | 89 | { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ |
eefd9029 | 90 | { USB_DEVICE(0x10C4, 0x8149) }, /* West Mountain Radio Computerized Battery Analyzer */ |
fc4bd64c JH |
91 | { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ |
92 | { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ | |
0bf7a81c | 93 | { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */ |
e988fc8a | 94 | { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ |
eefd9029 | 95 | { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */ |
c6535668 | 96 | { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ |
96623697 | 97 | { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ |
59fba744 | 98 | { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ |
eefd9029 | 99 | { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */ |
78001e3d BS |
100 | { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ |
101 | { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ | |
8be27c2d | 102 | { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */ |
bd07c551 | 103 | { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */ |
b7c7cbc8 | 104 | { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */ |
78001e3d | 105 | { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ |
877e262c | 106 | { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ |
95bec45d | 107 | { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */ |
bd07c551 | 108 | { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesys ETRX2USB */ |
b7c7cbc8 | 109 | { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ |
ba0f332c | 110 | { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ |
8bf16ba7 | 111 | { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ |
881e3c98 | 112 | { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ |
8bf16ba7 | 113 | { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ |
d23bac9f | 114 | { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ |
541e05ec | 115 | { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */ |
e988fc8a | 116 | { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ |
61926b97 | 117 | { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ |
eefd9029 | 118 | { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ |
5de8b3ac CS |
119 | { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ |
120 | { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ | |
121 | { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ | |
122 | { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ | |
ebaf494e | 123 | { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ |
b7c7cbc8 | 124 | { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ |
e05998d5 | 125 | { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ |
b7c7cbc8 | 126 | { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ |
5de8b3ac | 127 | { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ |
b0ce84d5 | 128 | { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ |
356c5a48 AIB |
129 | { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ |
130 | { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ | |
131 | { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ | |
132 | { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ | |
541e05ec CS |
133 | { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ |
134 | { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ | |
135 | { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ | |
136 | { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ | |
39a66b8d | 137 | { } /* Terminating Entry */ |
1da177e4 LT |
138 | }; |
139 | ||
ff7eb602 | 140 | MODULE_DEVICE_TABLE(usb, id_table); |
1da177e4 | 141 | |
4cc27bd6 CS |
142 | static struct usb_driver cp210x_driver = { |
143 | .name = "cp210x", | |
1da177e4 LT |
144 | .probe = usb_serial_probe, |
145 | .disconnect = usb_serial_disconnect, | |
146 | .id_table = id_table, | |
ba9dc657 | 147 | .no_dynamic_id = 1, |
1da177e4 LT |
148 | }; |
149 | ||
4cc27bd6 | 150 | static struct usb_serial_driver cp210x_device = { |
18fcac35 GKH |
151 | .driver = { |
152 | .owner = THIS_MODULE, | |
4cc27bd6 | 153 | .name = "cp210x", |
18fcac35 | 154 | }, |
4cc27bd6 | 155 | .usb_driver = &cp210x_driver, |
1da177e4 | 156 | .id_table = id_table, |
1da177e4 | 157 | .num_ports = 1, |
aea006b9 | 158 | .bulk_in_size = 256, |
d4e598f6 | 159 | .bulk_out_size = 256, |
4cc27bd6 CS |
160 | .open = cp210x_open, |
161 | .close = cp210x_close, | |
162 | .break_ctl = cp210x_break_ctl, | |
163 | .set_termios = cp210x_set_termios, | |
164 | .tiocmget = cp210x_tiocmget, | |
165 | .tiocmset = cp210x_tiocmset, | |
166 | .attach = cp210x_startup, | |
d94c7bd4 AC |
167 | .dtr_rts = cp210x_dtr_rts, |
168 | .carrier_raised = cp210x_carrier_raised | |
1da177e4 LT |
169 | }; |
170 | ||
39a66b8d | 171 | /* Config request types */ |
1da177e4 LT |
172 | #define REQTYPE_HOST_TO_DEVICE 0x41 |
173 | #define REQTYPE_DEVICE_TO_HOST 0xc1 | |
174 | ||
93ef1f1f CS |
175 | /* Config request codes */ |
176 | #define CP210X_IFC_ENABLE 0x00 | |
177 | #define CP210X_SET_BAUDDIV 0x01 | |
178 | #define CP210X_GET_BAUDDIV 0x02 | |
179 | #define CP210X_SET_LINE_CTL 0x03 | |
180 | #define CP210X_GET_LINE_CTL 0x04 | |
181 | #define CP210X_SET_BREAK 0x05 | |
182 | #define CP210X_IMM_CHAR 0x06 | |
183 | #define CP210X_SET_MHS 0x07 | |
184 | #define CP210X_GET_MDMSTS 0x08 | |
185 | #define CP210X_SET_XON 0x09 | |
186 | #define CP210X_SET_XOFF 0x0A | |
187 | #define CP210X_SET_EVENTMASK 0x0B | |
188 | #define CP210X_GET_EVENTMASK 0x0C | |
189 | #define CP210X_SET_CHAR 0x0D | |
190 | #define CP210X_GET_CHARS 0x0E | |
191 | #define CP210X_GET_PROPS 0x0F | |
192 | #define CP210X_GET_COMM_STATUS 0x10 | |
193 | #define CP210X_RESET 0x11 | |
194 | #define CP210X_PURGE 0x12 | |
195 | #define CP210X_SET_FLOW 0x13 | |
196 | #define CP210X_GET_FLOW 0x14 | |
197 | #define CP210X_EMBED_EVENTS 0x15 | |
198 | #define CP210X_GET_EVENTSTATE 0x16 | |
199 | #define CP210X_SET_CHARS 0x19 | |
200 | ||
201 | /* CP210X_IFC_ENABLE */ | |
1da177e4 LT |
202 | #define UART_ENABLE 0x0001 |
203 | #define UART_DISABLE 0x0000 | |
204 | ||
93ef1f1f | 205 | /* CP210X_(SET|GET)_BAUDDIV */ |
1da177e4 LT |
206 | #define BAUD_RATE_GEN_FREQ 0x384000 |
207 | ||
93ef1f1f | 208 | /* CP210X_(SET|GET)_LINE_CTL */ |
1da177e4 | 209 | #define BITS_DATA_MASK 0X0f00 |
39a66b8d | 210 | #define BITS_DATA_5 0X0500 |
1da177e4 LT |
211 | #define BITS_DATA_6 0X0600 |
212 | #define BITS_DATA_7 0X0700 | |
213 | #define BITS_DATA_8 0X0800 | |
214 | #define BITS_DATA_9 0X0900 | |
215 | ||
216 | #define BITS_PARITY_MASK 0x00f0 | |
217 | #define BITS_PARITY_NONE 0x0000 | |
218 | #define BITS_PARITY_ODD 0x0010 | |
219 | #define BITS_PARITY_EVEN 0x0020 | |
220 | #define BITS_PARITY_MARK 0x0030 | |
221 | #define BITS_PARITY_SPACE 0x0040 | |
222 | ||
223 | #define BITS_STOP_MASK 0x000f | |
224 | #define BITS_STOP_1 0x0000 | |
225 | #define BITS_STOP_1_5 0x0001 | |
226 | #define BITS_STOP_2 0x0002 | |
39a66b8d | 227 | |
93ef1f1f | 228 | /* CP210X_SET_BREAK */ |
72916791 CS |
229 | #define BREAK_ON 0x0001 |
230 | #define BREAK_OFF 0x0000 | |
1da177e4 | 231 | |
93ef1f1f | 232 | /* CP210X_(SET_MHS|GET_MDMSTS) */ |
39a66b8d CS |
233 | #define CONTROL_DTR 0x0001 |
234 | #define CONTROL_RTS 0x0002 | |
235 | #define CONTROL_CTS 0x0010 | |
236 | #define CONTROL_DSR 0x0020 | |
237 | #define CONTROL_RING 0x0040 | |
238 | #define CONTROL_DCD 0x0080 | |
239 | #define CONTROL_WRITE_DTR 0x0100 | |
240 | #define CONTROL_WRITE_RTS 0x0200 | |
1da177e4 | 241 | |
39a66b8d | 242 | /* |
4cc27bd6 CS |
243 | * cp210x_get_config |
244 | * Reads from the CP210x configuration registers | |
39a66b8d CS |
245 | * 'size' is specified in bytes. |
246 | * 'data' is a pointer to a pre-allocated array of integers large | |
247 | * enough to hold 'size' bytes (with 4 bytes to each integer) | |
248 | */ | |
4cc27bd6 | 249 | static int cp210x_get_config(struct usb_serial_port *port, u8 request, |
39a66b8d | 250 | unsigned int *data, int size) |
1da177e4 LT |
251 | { |
252 | struct usb_serial *serial = port->serial; | |
53ebb3b8 | 253 | __le32 *buf; |
39a66b8d CS |
254 | int result, i, length; |
255 | ||
256 | /* Number of integers required to contain the array */ | |
257 | length = (((size - 1) | 3) + 1)/4; | |
258 | ||
53ebb3b8 | 259 | buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); |
39a66b8d | 260 | if (!buf) { |
441b62c1 | 261 | dev_err(&port->dev, "%s - out of memory.\n", __func__); |
39a66b8d CS |
262 | return -ENOMEM; |
263 | } | |
1da177e4 | 264 | |
39a66b8d | 265 | /* Issue the request, attempting to read 'size' bytes */ |
ff7eb602 | 266 | result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
1da177e4 | 267 | request, REQTYPE_DEVICE_TO_HOST, 0x0000, |
39a66b8d | 268 | 0, buf, size, 300); |
1da177e4 | 269 | |
39a66b8d | 270 | /* Convert data into an array of integers */ |
ff7eb602 | 271 | for (i = 0; i < length; i++) |
39a66b8d | 272 | data[i] = le32_to_cpu(buf[i]); |
1da177e4 | 273 | |
39a66b8d | 274 | kfree(buf); |
1da177e4 | 275 | |
39a66b8d | 276 | if (result != size) { |
97324955 | 277 | dbg("%s - Unable to send config request, " |
39a66b8d | 278 | "request=0x%x size=%d result=%d\n", |
441b62c1 | 279 | __func__, request, size, result); |
39a66b8d CS |
280 | return -EPROTO; |
281 | } | |
1da177e4 | 282 | |
39a66b8d | 283 | return 0; |
1da177e4 LT |
284 | } |
285 | ||
39a66b8d | 286 | /* |
4cc27bd6 CS |
287 | * cp210x_set_config |
288 | * Writes to the CP210x configuration registers | |
39a66b8d CS |
289 | * Values less than 16 bits wide are sent directly |
290 | * 'size' is specified in bytes. | |
291 | */ | |
4cc27bd6 | 292 | static int cp210x_set_config(struct usb_serial_port *port, u8 request, |
39a66b8d | 293 | unsigned int *data, int size) |
1da177e4 LT |
294 | { |
295 | struct usb_serial *serial = port->serial; | |
53ebb3b8 | 296 | __le32 *buf; |
39a66b8d | 297 | int result, i, length; |
1da177e4 | 298 | |
39a66b8d CS |
299 | /* Number of integers required to contain the array */ |
300 | length = (((size - 1) | 3) + 1)/4; | |
301 | ||
53ebb3b8 | 302 | buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); |
39a66b8d CS |
303 | if (!buf) { |
304 | dev_err(&port->dev, "%s - out of memory.\n", | |
441b62c1 | 305 | __func__); |
39a66b8d CS |
306 | return -ENOMEM; |
307 | } | |
308 | ||
309 | /* Array of integers into bytes */ | |
310 | for (i = 0; i < length; i++) | |
311 | buf[i] = cpu_to_le32(data[i]); | |
312 | ||
313 | if (size > 2) { | |
ff7eb602 | 314 | result = usb_control_msg(serial->dev, |
39a66b8d CS |
315 | usb_sndctrlpipe(serial->dev, 0), |
316 | request, REQTYPE_HOST_TO_DEVICE, 0x0000, | |
317 | 0, buf, size, 300); | |
318 | } else { | |
ff7eb602 | 319 | result = usb_control_msg(serial->dev, |
39a66b8d CS |
320 | usb_sndctrlpipe(serial->dev, 0), |
321 | request, REQTYPE_HOST_TO_DEVICE, data[0], | |
322 | 0, NULL, 0, 300); | |
1da177e4 LT |
323 | } |
324 | ||
39a66b8d CS |
325 | kfree(buf); |
326 | ||
327 | if ((size > 2 && result != size) || result < 0) { | |
97324955 | 328 | dbg("%s - Unable to send request, " |
39a66b8d | 329 | "request=0x%x size=%d result=%d\n", |
441b62c1 | 330 | __func__, request, size, result); |
39a66b8d CS |
331 | return -EPROTO; |
332 | } | |
1da177e4 LT |
333 | |
334 | return 0; | |
335 | } | |
336 | ||
39a66b8d | 337 | /* |
4cc27bd6 CS |
338 | * cp210x_set_config_single |
339 | * Convenience function for calling cp210x_set_config on single data values | |
39a66b8d CS |
340 | * without requiring an integer pointer |
341 | */ | |
4cc27bd6 | 342 | static inline int cp210x_set_config_single(struct usb_serial_port *port, |
39a66b8d CS |
343 | u8 request, unsigned int data) |
344 | { | |
4cc27bd6 | 345 | return cp210x_set_config(port, request, &data, 2); |
39a66b8d CS |
346 | } |
347 | ||
ef8b6bcb | 348 | /* |
4cc27bd6 | 349 | * cp210x_quantise_baudrate |
ef8b6bcb CS |
350 | * Quantises the baud rate as per AN205 Table 1 |
351 | */ | |
4cc27bd6 | 352 | static unsigned int cp210x_quantise_baudrate(unsigned int baud) { |
ef8b6bcb CS |
353 | if (baud <= 56) baud = 0; |
354 | else if (baud <= 300) baud = 300; | |
355 | else if (baud <= 600) baud = 600; | |
356 | else if (baud <= 1200) baud = 1200; | |
357 | else if (baud <= 1800) baud = 1800; | |
358 | else if (baud <= 2400) baud = 2400; | |
359 | else if (baud <= 4000) baud = 4000; | |
360 | else if (baud <= 4803) baud = 4800; | |
361 | else if (baud <= 7207) baud = 7200; | |
362 | else if (baud <= 9612) baud = 9600; | |
363 | else if (baud <= 14428) baud = 14400; | |
364 | else if (baud <= 16062) baud = 16000; | |
365 | else if (baud <= 19250) baud = 19200; | |
366 | else if (baud <= 28912) baud = 28800; | |
367 | else if (baud <= 38601) baud = 38400; | |
368 | else if (baud <= 51558) baud = 51200; | |
369 | else if (baud <= 56280) baud = 56000; | |
370 | else if (baud <= 58053) baud = 57600; | |
371 | else if (baud <= 64111) baud = 64000; | |
372 | else if (baud <= 77608) baud = 76800; | |
373 | else if (baud <= 117028) baud = 115200; | |
374 | else if (baud <= 129347) baud = 128000; | |
375 | else if (baud <= 156868) baud = 153600; | |
376 | else if (baud <= 237832) baud = 230400; | |
377 | else if (baud <= 254234) baud = 250000; | |
378 | else if (baud <= 273066) baud = 256000; | |
379 | else if (baud <= 491520) baud = 460800; | |
380 | else if (baud <= 567138) baud = 500000; | |
381 | else if (baud <= 670254) baud = 576000; | |
382 | else if (baud <= 1053257) baud = 921600; | |
383 | else if (baud <= 1474560) baud = 1228800; | |
384 | else if (baud <= 2457600) baud = 1843200; | |
385 | else baud = 3686400; | |
386 | return baud; | |
387 | } | |
388 | ||
a509a7e4 | 389 | static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 | 390 | { |
1da177e4 LT |
391 | int result; |
392 | ||
441b62c1 | 393 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 394 | |
4cc27bd6 | 395 | if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) { |
1da177e4 | 396 | dev_err(&port->dev, "%s - Unable to enable UART\n", |
441b62c1 | 397 | __func__); |
1da177e4 LT |
398 | return -EPROTO; |
399 | } | |
400 | ||
a9013176 | 401 | result = usb_serial_generic_open(tty, port); |
2db6c769 | 402 | if (result) |
1da177e4 | 403 | return result; |
1da177e4 | 404 | |
39a66b8d | 405 | /* Configure the termios structure */ |
4cc27bd6 | 406 | cp210x_get_termios(tty, port); |
1da177e4 LT |
407 | return 0; |
408 | } | |
409 | ||
4cc27bd6 | 410 | static void cp210x_close(struct usb_serial_port *port) |
1da177e4 | 411 | { |
441b62c1 | 412 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 413 | |
f26788da | 414 | usb_serial_generic_close(port); |
1da177e4 | 415 | |
95bef012 ON |
416 | mutex_lock(&port->serial->disc_mutex); |
417 | if (!port->serial->disconnected) | |
4cc27bd6 | 418 | cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); |
95bef012 | 419 | mutex_unlock(&port->serial->disc_mutex); |
1da177e4 LT |
420 | } |
421 | ||
39a66b8d | 422 | /* |
4cc27bd6 | 423 | * cp210x_get_termios |
39a66b8d CS |
424 | * Reads the baud rate, data bits, parity, stop bits and flow control mode |
425 | * from the device, corrects any unsupported values, and configures the | |
426 | * termios structure to reflect the state of the device | |
427 | */ | |
4cc27bd6 | 428 | static void cp210x_get_termios(struct tty_struct *tty, |
d2ad67b3 V |
429 | struct usb_serial_port *port) |
430 | { | |
431 | unsigned int baud; | |
432 | ||
433 | if (tty) { | |
4cc27bd6 | 434 | cp210x_get_termios_port(tty->driver_data, |
d2ad67b3 V |
435 | &tty->termios->c_cflag, &baud); |
436 | tty_encode_baud_rate(tty, baud, baud); | |
437 | } | |
438 | ||
439 | else { | |
440 | unsigned int cflag; | |
441 | cflag = 0; | |
4cc27bd6 | 442 | cp210x_get_termios_port(port, &cflag, &baud); |
d2ad67b3 V |
443 | } |
444 | } | |
445 | ||
446 | /* | |
4cc27bd6 CS |
447 | * cp210x_get_termios_port |
448 | * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. | |
d2ad67b3 | 449 | */ |
4cc27bd6 | 450 | static void cp210x_get_termios_port(struct usb_serial_port *port, |
d2ad67b3 | 451 | unsigned int *cflagp, unsigned int *baudp) |
1da177e4 | 452 | { |
39a66b8d | 453 | unsigned int cflag, modem_ctl[4]; |
b2bdd1f5 HH |
454 | unsigned int baud; |
455 | unsigned int bits; | |
1da177e4 | 456 | |
441b62c1 | 457 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 458 | |
4cc27bd6 | 459 | cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2); |
39a66b8d | 460 | /* Convert to baudrate */ |
1da177e4 | 461 | if (baud) |
4cc27bd6 | 462 | baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); |
1da177e4 | 463 | |
441b62c1 | 464 | dbg("%s - baud rate = %d", __func__, baud); |
d2ad67b3 | 465 | *baudp = baud; |
9ab0f202 | 466 | |
d2ad67b3 | 467 | cflag = *cflagp; |
1da177e4 | 468 | |
4cc27bd6 | 469 | cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); |
1da177e4 | 470 | cflag &= ~CSIZE; |
ff7eb602 AC |
471 | switch (bits & BITS_DATA_MASK) { |
472 | case BITS_DATA_5: | |
473 | dbg("%s - data bits = 5", __func__); | |
474 | cflag |= CS5; | |
475 | break; | |
476 | case BITS_DATA_6: | |
477 | dbg("%s - data bits = 6", __func__); | |
478 | cflag |= CS6; | |
479 | break; | |
480 | case BITS_DATA_7: | |
481 | dbg("%s - data bits = 7", __func__); | |
482 | cflag |= CS7; | |
483 | break; | |
484 | case BITS_DATA_8: | |
485 | dbg("%s - data bits = 8", __func__); | |
486 | cflag |= CS8; | |
487 | break; | |
488 | case BITS_DATA_9: | |
489 | dbg("%s - data bits = 9 (not supported, using 8 data bits)", | |
490 | __func__); | |
491 | cflag |= CS8; | |
492 | bits &= ~BITS_DATA_MASK; | |
493 | bits |= BITS_DATA_8; | |
4cc27bd6 | 494 | cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
ff7eb602 AC |
495 | break; |
496 | default: | |
497 | dbg("%s - Unknown number of data bits, using 8", __func__); | |
498 | cflag |= CS8; | |
499 | bits &= ~BITS_DATA_MASK; | |
500 | bits |= BITS_DATA_8; | |
4cc27bd6 | 501 | cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
ff7eb602 | 502 | break; |
1da177e4 LT |
503 | } |
504 | ||
ff7eb602 AC |
505 | switch (bits & BITS_PARITY_MASK) { |
506 | case BITS_PARITY_NONE: | |
507 | dbg("%s - parity = NONE", __func__); | |
508 | cflag &= ~PARENB; | |
509 | break; | |
510 | case BITS_PARITY_ODD: | |
511 | dbg("%s - parity = ODD", __func__); | |
512 | cflag |= (PARENB|PARODD); | |
513 | break; | |
514 | case BITS_PARITY_EVEN: | |
515 | dbg("%s - parity = EVEN", __func__); | |
516 | cflag &= ~PARODD; | |
517 | cflag |= PARENB; | |
518 | break; | |
519 | case BITS_PARITY_MARK: | |
520 | dbg("%s - parity = MARK (not supported, disabling parity)", | |
521 | __func__); | |
522 | cflag &= ~PARENB; | |
523 | bits &= ~BITS_PARITY_MASK; | |
4cc27bd6 | 524 | cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
ff7eb602 AC |
525 | break; |
526 | case BITS_PARITY_SPACE: | |
527 | dbg("%s - parity = SPACE (not supported, disabling parity)", | |
528 | __func__); | |
529 | cflag &= ~PARENB; | |
530 | bits &= ~BITS_PARITY_MASK; | |
4cc27bd6 | 531 | cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
ff7eb602 AC |
532 | break; |
533 | default: | |
534 | dbg("%s - Unknown parity mode, disabling parity", __func__); | |
535 | cflag &= ~PARENB; | |
536 | bits &= ~BITS_PARITY_MASK; | |
4cc27bd6 | 537 | cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
ff7eb602 | 538 | break; |
1da177e4 LT |
539 | } |
540 | ||
541 | cflag &= ~CSTOPB; | |
ff7eb602 AC |
542 | switch (bits & BITS_STOP_MASK) { |
543 | case BITS_STOP_1: | |
544 | dbg("%s - stop bits = 1", __func__); | |
545 | break; | |
546 | case BITS_STOP_1_5: | |
547 | dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", | |
548 | __func__); | |
549 | bits &= ~BITS_STOP_MASK; | |
4cc27bd6 | 550 | cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
ff7eb602 AC |
551 | break; |
552 | case BITS_STOP_2: | |
553 | dbg("%s - stop bits = 2", __func__); | |
554 | cflag |= CSTOPB; | |
555 | break; | |
556 | default: | |
557 | dbg("%s - Unknown number of stop bits, using 1 stop bit", | |
558 | __func__); | |
559 | bits &= ~BITS_STOP_MASK; | |
4cc27bd6 | 560 | cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
ff7eb602 | 561 | break; |
1da177e4 LT |
562 | } |
563 | ||
4cc27bd6 | 564 | cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); |
39a66b8d | 565 | if (modem_ctl[0] & 0x0008) { |
441b62c1 | 566 | dbg("%s - flow control = CRTSCTS", __func__); |
39a66b8d CS |
567 | cflag |= CRTSCTS; |
568 | } else { | |
441b62c1 | 569 | dbg("%s - flow control = NONE", __func__); |
39a66b8d CS |
570 | cflag &= ~CRTSCTS; |
571 | } | |
572 | ||
d2ad67b3 | 573 | *cflagp = cflag; |
1da177e4 LT |
574 | } |
575 | ||
4cc27bd6 | 576 | static void cp210x_set_termios(struct tty_struct *tty, |
95da310e | 577 | struct usb_serial_port *port, struct ktermios *old_termios) |
1da177e4 | 578 | { |
9ab0f202 | 579 | unsigned int cflag, old_cflag; |
b2bdd1f5 | 580 | unsigned int baud = 0, bits; |
39a66b8d | 581 | unsigned int modem_ctl[4]; |
1da177e4 | 582 | |
441b62c1 | 583 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 584 | |
95da310e | 585 | if (!tty) |
1da177e4 | 586 | return; |
9ab0f202 | 587 | |
95da310e AC |
588 | tty->termios->c_cflag &= ~CMSPAR; |
589 | cflag = tty->termios->c_cflag; | |
01e96d28 | 590 | old_cflag = old_termios->c_cflag; |
4cc27bd6 | 591 | baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty)); |
1da177e4 LT |
592 | |
593 | /* If the baud rate is to be updated*/ | |
ef8b6bcb CS |
594 | if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { |
595 | dbg("%s - Setting baud rate to %d baud", __func__, | |
596 | baud); | |
4cc27bd6 | 597 | if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV, |
ef8b6bcb | 598 | ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { |
759f3634 | 599 | dbg("Baud rate requested not supported by device"); |
ef8b6bcb | 600 | baud = tty_termios_baud_rate(old_termios); |
1da177e4 LT |
601 | } |
602 | } | |
9ab0f202 | 603 | /* Report back the resulting baud rate */ |
95da310e | 604 | tty_encode_baud_rate(tty, baud, baud); |
1da177e4 | 605 | |
39a66b8d | 606 | /* If the number of data bits is to be updated */ |
1da177e4 | 607 | if ((cflag & CSIZE) != (old_cflag & CSIZE)) { |
4cc27bd6 | 608 | cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); |
1da177e4 LT |
609 | bits &= ~BITS_DATA_MASK; |
610 | switch (cflag & CSIZE) { | |
ff7eb602 AC |
611 | case CS5: |
612 | bits |= BITS_DATA_5; | |
613 | dbg("%s - data bits = 5", __func__); | |
614 | break; | |
615 | case CS6: | |
616 | bits |= BITS_DATA_6; | |
617 | dbg("%s - data bits = 6", __func__); | |
618 | break; | |
619 | case CS7: | |
620 | bits |= BITS_DATA_7; | |
621 | dbg("%s - data bits = 7", __func__); | |
622 | break; | |
623 | case CS8: | |
624 | bits |= BITS_DATA_8; | |
625 | dbg("%s - data bits = 8", __func__); | |
626 | break; | |
627 | /*case CS9: | |
628 | bits |= BITS_DATA_9; | |
629 | dbg("%s - data bits = 9", __func__); | |
630 | break;*/ | |
631 | default: | |
4cc27bd6 | 632 | dbg("cp210x driver does not " |
1da177e4 LT |
633 | "support the number of bits requested," |
634 | " using 8 bit mode\n"); | |
635 | bits |= BITS_DATA_8; | |
636 | break; | |
637 | } | |
4cc27bd6 | 638 | if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) |
97324955 | 639 | dbg("Number of data bits requested " |
1da177e4 LT |
640 | "not supported by device\n"); |
641 | } | |
642 | ||
643 | if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { | |
4cc27bd6 | 644 | cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); |
1da177e4 LT |
645 | bits &= ~BITS_PARITY_MASK; |
646 | if (cflag & PARENB) { | |
647 | if (cflag & PARODD) { | |
648 | bits |= BITS_PARITY_ODD; | |
441b62c1 | 649 | dbg("%s - parity = ODD", __func__); |
1da177e4 LT |
650 | } else { |
651 | bits |= BITS_PARITY_EVEN; | |
441b62c1 | 652 | dbg("%s - parity = EVEN", __func__); |
1da177e4 LT |
653 | } |
654 | } | |
4cc27bd6 | 655 | if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) |
97324955 | 656 | dbg("Parity mode not supported " |
1da177e4 LT |
657 | "by device\n"); |
658 | } | |
659 | ||
660 | if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { | |
4cc27bd6 | 661 | cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); |
1da177e4 LT |
662 | bits &= ~BITS_STOP_MASK; |
663 | if (cflag & CSTOPB) { | |
664 | bits |= BITS_STOP_2; | |
441b62c1 | 665 | dbg("%s - stop bits = 2", __func__); |
1da177e4 LT |
666 | } else { |
667 | bits |= BITS_STOP_1; | |
441b62c1 | 668 | dbg("%s - stop bits = 1", __func__); |
1da177e4 | 669 | } |
4cc27bd6 | 670 | if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) |
97324955 | 671 | dbg("Number of stop bits requested " |
1da177e4 LT |
672 | "not supported by device\n"); |
673 | } | |
39a66b8d CS |
674 | |
675 | if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { | |
4cc27bd6 | 676 | cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); |
39a66b8d | 677 | dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", |
441b62c1 | 678 | __func__, modem_ctl[0], modem_ctl[1], |
39a66b8d CS |
679 | modem_ctl[2], modem_ctl[3]); |
680 | ||
681 | if (cflag & CRTSCTS) { | |
682 | modem_ctl[0] &= ~0x7B; | |
683 | modem_ctl[0] |= 0x09; | |
684 | modem_ctl[1] = 0x80; | |
441b62c1 | 685 | dbg("%s - flow control = CRTSCTS", __func__); |
39a66b8d CS |
686 | } else { |
687 | modem_ctl[0] &= ~0x7B; | |
688 | modem_ctl[0] |= 0x01; | |
689 | modem_ctl[1] |= 0x40; | |
441b62c1 | 690 | dbg("%s - flow control = NONE", __func__); |
39a66b8d CS |
691 | } |
692 | ||
693 | dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", | |
441b62c1 | 694 | __func__, modem_ctl[0], modem_ctl[1], |
39a66b8d | 695 | modem_ctl[2], modem_ctl[3]); |
4cc27bd6 | 696 | cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); |
39a66b8d CS |
697 | } |
698 | ||
699 | } | |
700 | ||
4cc27bd6 | 701 | static int cp210x_tiocmset (struct tty_struct *tty, struct file *file, |
39a66b8d CS |
702 | unsigned int set, unsigned int clear) |
703 | { | |
95da310e | 704 | struct usb_serial_port *port = tty->driver_data; |
4cc27bd6 | 705 | return cp210x_tiocmset_port(port, file, set, clear); |
d2ad67b3 V |
706 | } |
707 | ||
4cc27bd6 | 708 | static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file, |
d2ad67b3 V |
709 | unsigned int set, unsigned int clear) |
710 | { | |
b2bdd1f5 | 711 | unsigned int control = 0; |
39a66b8d | 712 | |
441b62c1 | 713 | dbg("%s - port %d", __func__, port->number); |
39a66b8d CS |
714 | |
715 | if (set & TIOCM_RTS) { | |
716 | control |= CONTROL_RTS; | |
717 | control |= CONTROL_WRITE_RTS; | |
718 | } | |
719 | if (set & TIOCM_DTR) { | |
720 | control |= CONTROL_DTR; | |
721 | control |= CONTROL_WRITE_DTR; | |
722 | } | |
723 | if (clear & TIOCM_RTS) { | |
724 | control &= ~CONTROL_RTS; | |
725 | control |= CONTROL_WRITE_RTS; | |
726 | } | |
727 | if (clear & TIOCM_DTR) { | |
728 | control &= ~CONTROL_DTR; | |
729 | control |= CONTROL_WRITE_DTR; | |
730 | } | |
731 | ||
441b62c1 | 732 | dbg("%s - control = 0x%.4x", __func__, control); |
39a66b8d | 733 | |
4cc27bd6 | 734 | return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); |
39a66b8d CS |
735 | } |
736 | ||
d94c7bd4 AC |
737 | static void cp210x_dtr_rts(struct usb_serial_port *p, int on) |
738 | { | |
739 | if (on) | |
740 | cp210x_tiocmset_port(p, NULL, TIOCM_DTR|TIOCM_RTS, 0); | |
741 | else | |
742 | cp210x_tiocmset_port(p, NULL, 0, TIOCM_DTR|TIOCM_RTS); | |
743 | } | |
744 | ||
4cc27bd6 | 745 | static int cp210x_tiocmget (struct tty_struct *tty, struct file *file) |
39a66b8d | 746 | { |
95da310e | 747 | struct usb_serial_port *port = tty->driver_data; |
b2bdd1f5 HH |
748 | unsigned int control; |
749 | int result; | |
39a66b8d | 750 | |
441b62c1 | 751 | dbg("%s - port %d", __func__, port->number); |
39a66b8d | 752 | |
4cc27bd6 | 753 | cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); |
39a66b8d CS |
754 | |
755 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
756 | |((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
757 | |((control & CONTROL_CTS) ? TIOCM_CTS : 0) | |
758 | |((control & CONTROL_DSR) ? TIOCM_DSR : 0) | |
759 | |((control & CONTROL_RING)? TIOCM_RI : 0) | |
760 | |((control & CONTROL_DCD) ? TIOCM_CD : 0); | |
761 | ||
441b62c1 | 762 | dbg("%s - control = 0x%.2x", __func__, control); |
39a66b8d CS |
763 | |
764 | return result; | |
1da177e4 LT |
765 | } |
766 | ||
d94c7bd4 AC |
767 | static int cp210x_carrier_raised(struct usb_serial_port *p) |
768 | { | |
769 | unsigned int control; | |
770 | cp210x_get_config(p, CP210X_GET_MDMSTS, &control, 1); | |
771 | if (control & CONTROL_DCD) | |
772 | return 1; | |
773 | return 0; | |
774 | } | |
775 | ||
4cc27bd6 | 776 | static void cp210x_break_ctl (struct tty_struct *tty, int break_state) |
1da177e4 | 777 | { |
95da310e | 778 | struct usb_serial_port *port = tty->driver_data; |
b2bdd1f5 | 779 | unsigned int state; |
1da177e4 | 780 | |
441b62c1 | 781 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
782 | if (break_state == 0) |
783 | state = BREAK_OFF; | |
784 | else | |
785 | state = BREAK_ON; | |
441b62c1 | 786 | dbg("%s - turning break %s", __func__, |
ff7eb602 | 787 | state == BREAK_OFF ? "off" : "on"); |
4cc27bd6 | 788 | cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); |
1da177e4 LT |
789 | } |
790 | ||
4cc27bd6 | 791 | static int cp210x_startup(struct usb_serial *serial) |
1da177e4 | 792 | { |
4cc27bd6 | 793 | /* cp210x buffers behave strangely unless device is reset */ |
1da177e4 LT |
794 | usb_reset_device(serial->dev); |
795 | return 0; | |
796 | } | |
797 | ||
4cc27bd6 | 798 | static int __init cp210x_init(void) |
1da177e4 LT |
799 | { |
800 | int retval; | |
801 | ||
4cc27bd6 | 802 | retval = usb_serial_register(&cp210x_device); |
1da177e4 | 803 | if (retval) |
39a66b8d | 804 | return retval; /* Failed to register */ |
1da177e4 | 805 | |
4cc27bd6 | 806 | retval = usb_register(&cp210x_driver); |
1da177e4 | 807 | if (retval) { |
39a66b8d | 808 | /* Failed to register */ |
4cc27bd6 | 809 | usb_serial_deregister(&cp210x_device); |
1da177e4 LT |
810 | return retval; |
811 | } | |
812 | ||
39a66b8d | 813 | /* Success */ |
c197a8db GKH |
814 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
815 | DRIVER_DESC "\n"); | |
1da177e4 LT |
816 | return 0; |
817 | } | |
818 | ||
4cc27bd6 | 819 | static void __exit cp210x_exit(void) |
1da177e4 | 820 | { |
4cc27bd6 CS |
821 | usb_deregister(&cp210x_driver); |
822 | usb_serial_deregister(&cp210x_device); | |
1da177e4 LT |
823 | } |
824 | ||
4cc27bd6 CS |
825 | module_init(cp210x_init); |
826 | module_exit(cp210x_exit); | |
1da177e4 LT |
827 | |
828 | MODULE_DESCRIPTION(DRIVER_DESC); | |
829 | MODULE_VERSION(DRIVER_VERSION); | |
830 | MODULE_LICENSE("GPL"); | |
831 | ||
832 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
833 | MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); |