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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Silicon Laboratories CP2101/CP2102 USB to RS232 serial adaptor driver | |
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 | * | |
14 | * Outstanding Issues: | |
15 | * Buffers are not flushed when the port is opened. | |
16 | * Multiple calls to write() may fail with "Resource temporarily unavailable" | |
17 | * | |
1da177e4 LT |
18 | */ |
19 | ||
20 | #include <linux/config.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/errno.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/tty.h> | |
25 | #include <linux/tty_flip.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/moduleparam.h> | |
28 | #include <linux/usb.h> | |
29 | #include <asm/uaccess.h> | |
30 | #include "usb-serial.h" | |
31 | ||
32 | /* | |
33 | * Version Information | |
34 | */ | |
59224f53 | 35 | #define DRIVER_VERSION "v0.07" |
1da177e4 LT |
36 | #define DRIVER_DESC "Silicon Labs CP2101/CP2102 RS232 serial adaptor driver" |
37 | ||
38 | /* | |
39 | * Function Prototypes | |
40 | */ | |
41 | static int cp2101_open(struct usb_serial_port*, struct file*); | |
42 | static void cp2101_cleanup(struct usb_serial_port*); | |
43 | static void cp2101_close(struct usb_serial_port*, struct file*); | |
44 | static void cp2101_get_termios(struct usb_serial_port*); | |
45 | static void cp2101_set_termios(struct usb_serial_port*, struct termios*); | |
39a66b8d CS |
46 | static int cp2101_tiocmget (struct usb_serial_port *, struct file *); |
47 | static int cp2101_tiocmset (struct usb_serial_port *, struct file *, | |
48 | unsigned int, unsigned int); | |
1da177e4 LT |
49 | static void cp2101_break_ctl(struct usb_serial_port*, int); |
50 | static int cp2101_startup (struct usb_serial *); | |
51 | static void cp2101_shutdown(struct usb_serial*); | |
52 | ||
53 | ||
54 | static int debug; | |
55 | ||
56 | static struct usb_device_id id_table [] = { | |
198b9517 | 57 | { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ |
198b9517 | 58 | { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ |
e988fc8a CS |
59 | { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ |
60 | { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ | |
59224f53 | 61 | { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ |
e988fc8a CS |
62 | { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ |
63 | { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ | |
64 | { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ | |
65 | { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ | |
66 | { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ | |
67 | { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ | |
b0ce84d5 | 68 | { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ |
39a66b8d | 69 | { } /* Terminating Entry */ |
1da177e4 LT |
70 | }; |
71 | ||
72 | MODULE_DEVICE_TABLE (usb, id_table); | |
73 | ||
74 | static struct usb_driver cp2101_driver = { | |
269bda1c | 75 | .name = "cp2101", |
1da177e4 LT |
76 | .probe = usb_serial_probe, |
77 | .disconnect = usb_serial_disconnect, | |
78 | .id_table = id_table, | |
ba9dc657 | 79 | .no_dynamic_id = 1, |
1da177e4 LT |
80 | }; |
81 | ||
ea65370d | 82 | static struct usb_serial_driver cp2101_device = { |
18fcac35 GKH |
83 | .driver = { |
84 | .owner = THIS_MODULE, | |
269bda1c | 85 | .name = "cp2101", |
18fcac35 | 86 | }, |
1da177e4 LT |
87 | .id_table = id_table, |
88 | .num_interrupt_in = 0, | |
89 | .num_bulk_in = 0, | |
90 | .num_bulk_out = 0, | |
91 | .num_ports = 1, | |
92 | .open = cp2101_open, | |
93 | .close = cp2101_close, | |
94 | .break_ctl = cp2101_break_ctl, | |
95 | .set_termios = cp2101_set_termios, | |
39a66b8d CS |
96 | .tiocmget = cp2101_tiocmget, |
97 | .tiocmset = cp2101_tiocmset, | |
1da177e4 LT |
98 | .attach = cp2101_startup, |
99 | .shutdown = cp2101_shutdown, | |
100 | }; | |
101 | ||
39a66b8d | 102 | /* Config request types */ |
1da177e4 LT |
103 | #define REQTYPE_HOST_TO_DEVICE 0x41 |
104 | #define REQTYPE_DEVICE_TO_HOST 0xc1 | |
105 | ||
39a66b8d CS |
106 | /* Config SET requests. To GET, add 1 to the request number */ |
107 | #define CP2101_UART 0x00 /* Enable / Disable */ | |
108 | #define CP2101_BAUDRATE 0x01 /* (BAUD_RATE_GEN_FREQ / baudrate) */ | |
109 | #define CP2101_BITS 0x03 /* 0x(0)(databits)(parity)(stopbits) */ | |
110 | #define CP2101_BREAK 0x05 /* On / Off */ | |
111 | #define CP2101_CONTROL 0x07 /* Flow control line states */ | |
112 | #define CP2101_MODEMCTL 0x13 /* Modem controls */ | |
113 | #define CP2101_CONFIG_6 0x19 /* 6 bytes of config data ??? */ | |
1da177e4 | 114 | |
39a66b8d | 115 | /* CP2101_UART */ |
1da177e4 LT |
116 | #define UART_ENABLE 0x0001 |
117 | #define UART_DISABLE 0x0000 | |
118 | ||
39a66b8d | 119 | /* CP2101_BAUDRATE */ |
1da177e4 LT |
120 | #define BAUD_RATE_GEN_FREQ 0x384000 |
121 | ||
39a66b8d | 122 | /* CP2101_BITS */ |
1da177e4 | 123 | #define BITS_DATA_MASK 0X0f00 |
39a66b8d | 124 | #define BITS_DATA_5 0X0500 |
1da177e4 LT |
125 | #define BITS_DATA_6 0X0600 |
126 | #define BITS_DATA_7 0X0700 | |
127 | #define BITS_DATA_8 0X0800 | |
128 | #define BITS_DATA_9 0X0900 | |
129 | ||
130 | #define BITS_PARITY_MASK 0x00f0 | |
131 | #define BITS_PARITY_NONE 0x0000 | |
132 | #define BITS_PARITY_ODD 0x0010 | |
133 | #define BITS_PARITY_EVEN 0x0020 | |
134 | #define BITS_PARITY_MARK 0x0030 | |
135 | #define BITS_PARITY_SPACE 0x0040 | |
136 | ||
137 | #define BITS_STOP_MASK 0x000f | |
138 | #define BITS_STOP_1 0x0000 | |
139 | #define BITS_STOP_1_5 0x0001 | |
140 | #define BITS_STOP_2 0x0002 | |
39a66b8d CS |
141 | |
142 | /* CP2101_BREAK */ | |
1da177e4 LT |
143 | #define BREAK_ON 0x0000 |
144 | #define BREAK_OFF 0x0001 | |
145 | ||
39a66b8d CS |
146 | /* CP2101_CONTROL */ |
147 | #define CONTROL_DTR 0x0001 | |
148 | #define CONTROL_RTS 0x0002 | |
149 | #define CONTROL_CTS 0x0010 | |
150 | #define CONTROL_DSR 0x0020 | |
151 | #define CONTROL_RING 0x0040 | |
152 | #define CONTROL_DCD 0x0080 | |
153 | #define CONTROL_WRITE_DTR 0x0100 | |
154 | #define CONTROL_WRITE_RTS 0x0200 | |
1da177e4 | 155 | |
39a66b8d CS |
156 | /* |
157 | * cp2101_get_config | |
158 | * Reads from the CP2101 configuration registers | |
159 | * 'size' is specified in bytes. | |
160 | * 'data' is a pointer to a pre-allocated array of integers large | |
161 | * enough to hold 'size' bytes (with 4 bytes to each integer) | |
162 | */ | |
163 | static int cp2101_get_config(struct usb_serial_port* port, u8 request, | |
164 | unsigned int *data, int size) | |
1da177e4 LT |
165 | { |
166 | struct usb_serial *serial = port->serial; | |
39a66b8d CS |
167 | u32 *buf; |
168 | int result, i, length; | |
169 | ||
170 | /* Number of integers required to contain the array */ | |
171 | length = (((size - 1) | 3) + 1)/4; | |
172 | ||
80b6ca48 | 173 | buf = kcalloc(length, sizeof(u32), GFP_KERNEL); |
39a66b8d CS |
174 | if (!buf) { |
175 | dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__); | |
176 | return -ENOMEM; | |
177 | } | |
1da177e4 | 178 | |
39a66b8d | 179 | /* For get requests, the request number must be incremented */ |
1da177e4 LT |
180 | request++; |
181 | ||
39a66b8d | 182 | /* Issue the request, attempting to read 'size' bytes */ |
1da177e4 LT |
183 | result = usb_control_msg (serial->dev,usb_rcvctrlpipe (serial->dev, 0), |
184 | request, REQTYPE_DEVICE_TO_HOST, 0x0000, | |
39a66b8d | 185 | 0, buf, size, 300); |
1da177e4 | 186 | |
39a66b8d CS |
187 | /* Convert data into an array of integers */ |
188 | for (i=0; i<length; i++) | |
189 | data[i] = le32_to_cpu(buf[i]); | |
1da177e4 | 190 | |
39a66b8d | 191 | kfree(buf); |
1da177e4 | 192 | |
39a66b8d CS |
193 | if (result != size) { |
194 | dev_err(&port->dev, "%s - Unable to send config request, " | |
195 | "request=0x%x size=%d result=%d\n", | |
196 | __FUNCTION__, request, size, result); | |
197 | return -EPROTO; | |
198 | } | |
1da177e4 | 199 | |
39a66b8d | 200 | return 0; |
1da177e4 LT |
201 | } |
202 | ||
39a66b8d CS |
203 | /* |
204 | * cp2101_set_config | |
205 | * Writes to the CP2101 configuration registers | |
206 | * Values less than 16 bits wide are sent directly | |
207 | * 'size' is specified in bytes. | |
208 | */ | |
209 | static int cp2101_set_config(struct usb_serial_port* port, u8 request, | |
210 | unsigned int *data, int size) | |
1da177e4 LT |
211 | { |
212 | struct usb_serial *serial = port->serial; | |
39a66b8d CS |
213 | u32 *buf; |
214 | int result, i, length; | |
1da177e4 | 215 | |
39a66b8d CS |
216 | /* Number of integers required to contain the array */ |
217 | length = (((size - 1) | 3) + 1)/4; | |
218 | ||
219 | buf = kmalloc(length * sizeof(u32), GFP_KERNEL); | |
220 | if (!buf) { | |
221 | dev_err(&port->dev, "%s - out of memory.\n", | |
222 | __FUNCTION__); | |
223 | return -ENOMEM; | |
224 | } | |
225 | ||
226 | /* Array of integers into bytes */ | |
227 | for (i = 0; i < length; i++) | |
228 | buf[i] = cpu_to_le32(data[i]); | |
229 | ||
230 | if (size > 2) { | |
231 | result = usb_control_msg (serial->dev, | |
232 | usb_sndctrlpipe(serial->dev, 0), | |
233 | request, REQTYPE_HOST_TO_DEVICE, 0x0000, | |
234 | 0, buf, size, 300); | |
235 | } else { | |
236 | result = usb_control_msg (serial->dev, | |
237 | usb_sndctrlpipe(serial->dev, 0), | |
238 | request, REQTYPE_HOST_TO_DEVICE, data[0], | |
239 | 0, NULL, 0, 300); | |
1da177e4 LT |
240 | } |
241 | ||
39a66b8d CS |
242 | kfree(buf); |
243 | ||
244 | if ((size > 2 && result != size) || result < 0) { | |
245 | dev_err(&port->dev, "%s - Unable to send request, " | |
246 | "request=0x%x size=%d result=%d\n", | |
247 | __FUNCTION__, request, size, result); | |
248 | return -EPROTO; | |
249 | } | |
1da177e4 | 250 | |
39a66b8d CS |
251 | /* Single data value */ |
252 | result = usb_control_msg (serial->dev, | |
253 | usb_sndctrlpipe(serial->dev, 0), | |
254 | request, REQTYPE_HOST_TO_DEVICE, data[0], | |
255 | 0, NULL, 0, 300); | |
1da177e4 LT |
256 | return 0; |
257 | } | |
258 | ||
39a66b8d CS |
259 | /* |
260 | * cp2101_set_config_single | |
261 | * Convenience function for calling cp2101_set_config on single data values | |
262 | * without requiring an integer pointer | |
263 | */ | |
264 | static inline int cp2101_set_config_single(struct usb_serial_port* port, | |
265 | u8 request, unsigned int data) | |
266 | { | |
267 | return cp2101_set_config(port, request, &data, 2); | |
268 | } | |
269 | ||
1da177e4 LT |
270 | static int cp2101_open (struct usb_serial_port *port, struct file *filp) |
271 | { | |
272 | struct usb_serial *serial = port->serial; | |
273 | int result; | |
274 | ||
275 | dbg("%s - port %d", __FUNCTION__, port->number); | |
276 | ||
39a66b8d | 277 | if (cp2101_set_config_single(port, CP2101_UART, UART_ENABLE)) { |
1da177e4 LT |
278 | dev_err(&port->dev, "%s - Unable to enable UART\n", |
279 | __FUNCTION__); | |
280 | return -EPROTO; | |
281 | } | |
282 | ||
283 | /* Start reading from the device */ | |
284 | usb_fill_bulk_urb (port->read_urb, serial->dev, | |
285 | usb_rcvbulkpipe(serial->dev, | |
286 | port->bulk_in_endpointAddress), | |
287 | port->read_urb->transfer_buffer, | |
288 | port->read_urb->transfer_buffer_length, | |
289 | serial->type->read_bulk_callback, | |
290 | port); | |
291 | result = usb_submit_urb(port->read_urb, GFP_KERNEL); | |
292 | if (result) { | |
293 | dev_err(&port->dev, "%s - failed resubmitting read urb, " | |
294 | "error %d\n", __FUNCTION__, result); | |
295 | return result; | |
296 | } | |
297 | ||
39a66b8d | 298 | /* Configure the termios structure */ |
1da177e4 LT |
299 | cp2101_get_termios(port); |
300 | ||
39a66b8d CS |
301 | /* Set the DTR and RTS pins low */ |
302 | cp2101_tiocmset(port, NULL, TIOCM_DTR | TIOCM_RTS, 0); | |
303 | ||
1da177e4 LT |
304 | return 0; |
305 | } | |
306 | ||
307 | static void cp2101_cleanup (struct usb_serial_port *port) | |
308 | { | |
309 | struct usb_serial *serial = port->serial; | |
310 | ||
311 | dbg("%s - port %d", __FUNCTION__, port->number); | |
312 | ||
313 | if (serial->dev) { | |
314 | /* shutdown any bulk reads that might be going on */ | |
315 | if (serial->num_bulk_out) | |
316 | usb_kill_urb(port->write_urb); | |
317 | if (serial->num_bulk_in) | |
318 | usb_kill_urb(port->read_urb); | |
319 | } | |
320 | } | |
321 | ||
322 | static void cp2101_close (struct usb_serial_port *port, struct file * filp) | |
323 | { | |
324 | dbg("%s - port %d", __FUNCTION__, port->number); | |
325 | ||
326 | /* shutdown our urbs */ | |
327 | dbg("%s - shutting down urbs", __FUNCTION__); | |
328 | usb_kill_urb(port->write_urb); | |
329 | usb_kill_urb(port->read_urb); | |
330 | ||
39a66b8d | 331 | cp2101_set_config_single(port, CP2101_UART, UART_DISABLE); |
1da177e4 LT |
332 | } |
333 | ||
39a66b8d CS |
334 | /* |
335 | * cp2101_get_termios | |
336 | * Reads the baud rate, data bits, parity, stop bits and flow control mode | |
337 | * from the device, corrects any unsupported values, and configures the | |
338 | * termios structure to reflect the state of the device | |
339 | */ | |
1da177e4 LT |
340 | static void cp2101_get_termios (struct usb_serial_port *port) |
341 | { | |
39a66b8d | 342 | unsigned int cflag, modem_ctl[4]; |
1da177e4 LT |
343 | int baud; |
344 | int bits; | |
345 | ||
346 | dbg("%s - port %d", __FUNCTION__, port->number); | |
347 | ||
348 | if ((!port->tty) || (!port->tty->termios)) { | |
349 | dbg("%s - no tty structures", __FUNCTION__); | |
350 | return; | |
351 | } | |
352 | cflag = port->tty->termios->c_cflag; | |
353 | ||
39a66b8d CS |
354 | cp2101_get_config(port, CP2101_BAUDRATE, &baud, 2); |
355 | /* Convert to baudrate */ | |
1da177e4 LT |
356 | if (baud) |
357 | baud = BAUD_RATE_GEN_FREQ / baud; | |
358 | ||
359 | dbg("%s - baud rate = %d", __FUNCTION__, baud); | |
360 | cflag &= ~CBAUD; | |
361 | switch (baud) { | |
39a66b8d CS |
362 | /* |
363 | * The baud rates which are commented out below | |
1da177e4 LT |
364 | * appear to be supported by the device |
365 | * but are non-standard | |
366 | */ | |
367 | case 600: cflag |= B600; break; | |
368 | case 1200: cflag |= B1200; break; | |
369 | case 1800: cflag |= B1800; break; | |
370 | case 2400: cflag |= B2400; break; | |
371 | case 4800: cflag |= B4800; break; | |
372 | /*case 7200: cflag |= B7200; break;*/ | |
373 | case 9600: cflag |= B9600; break; | |
374 | /*case 14400: cflag |= B14400; break;*/ | |
375 | case 19200: cflag |= B19200; break; | |
376 | /*case 28800: cflag |= B28800; break;*/ | |
377 | case 38400: cflag |= B38400; break; | |
378 | /*case 55854: cflag |= B55054; break;*/ | |
379 | case 57600: cflag |= B57600; break; | |
380 | case 115200: cflag |= B115200; break; | |
381 | /*case 127117: cflag |= B127117; break;*/ | |
382 | case 230400: cflag |= B230400; break; | |
383 | case 460800: cflag |= B460800; break; | |
384 | case 921600: cflag |= B921600; break; | |
385 | /*case 3686400: cflag |= B3686400; break;*/ | |
386 | default: | |
387 | dbg("%s - Baud rate is not supported, " | |
388 | "using 9600 baud", __FUNCTION__); | |
389 | cflag |= B9600; | |
39a66b8d | 390 | cp2101_set_config_single(port, CP2101_BAUDRATE, |
1da177e4 LT |
391 | (BAUD_RATE_GEN_FREQ/9600)); |
392 | break; | |
393 | } | |
394 | ||
39a66b8d | 395 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
396 | cflag &= ~CSIZE; |
397 | switch(bits & BITS_DATA_MASK) { | |
39a66b8d CS |
398 | case BITS_DATA_5: |
399 | dbg("%s - data bits = 5", __FUNCTION__); | |
400 | cflag |= CS5; | |
401 | break; | |
1da177e4 LT |
402 | case BITS_DATA_6: |
403 | dbg("%s - data bits = 6", __FUNCTION__); | |
404 | cflag |= CS6; | |
405 | break; | |
406 | case BITS_DATA_7: | |
407 | dbg("%s - data bits = 7", __FUNCTION__); | |
408 | cflag |= CS7; | |
409 | break; | |
410 | case BITS_DATA_8: | |
411 | dbg("%s - data bits = 8", __FUNCTION__); | |
412 | cflag |= CS8; | |
413 | break; | |
414 | case BITS_DATA_9: | |
415 | dbg("%s - data bits = 9 (not supported, " | |
416 | "using 8 data bits)", __FUNCTION__); | |
417 | cflag |= CS8; | |
418 | bits &= ~BITS_DATA_MASK; | |
419 | bits |= BITS_DATA_8; | |
39a66b8d | 420 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
421 | break; |
422 | default: | |
423 | dbg("%s - Unknown number of data bits, " | |
424 | "using 8", __FUNCTION__); | |
425 | cflag |= CS8; | |
426 | bits &= ~BITS_DATA_MASK; | |
427 | bits |= BITS_DATA_8; | |
39a66b8d | 428 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
429 | break; |
430 | } | |
431 | ||
432 | switch(bits & BITS_PARITY_MASK) { | |
433 | case BITS_PARITY_NONE: | |
434 | dbg("%s - parity = NONE", __FUNCTION__); | |
435 | cflag &= ~PARENB; | |
436 | break; | |
437 | case BITS_PARITY_ODD: | |
438 | dbg("%s - parity = ODD", __FUNCTION__); | |
439 | cflag |= (PARENB|PARODD); | |
440 | break; | |
441 | case BITS_PARITY_EVEN: | |
442 | dbg("%s - parity = EVEN", __FUNCTION__); | |
443 | cflag &= ~PARODD; | |
444 | cflag |= PARENB; | |
445 | break; | |
446 | case BITS_PARITY_MARK: | |
447 | dbg("%s - parity = MARK (not supported, " | |
448 | "disabling parity)", __FUNCTION__); | |
449 | cflag &= ~PARENB; | |
450 | bits &= ~BITS_PARITY_MASK; | |
39a66b8d | 451 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
452 | break; |
453 | case BITS_PARITY_SPACE: | |
454 | dbg("%s - parity = SPACE (not supported, " | |
455 | "disabling parity)", __FUNCTION__); | |
456 | cflag &= ~PARENB; | |
457 | bits &= ~BITS_PARITY_MASK; | |
39a66b8d | 458 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
459 | break; |
460 | default: | |
461 | dbg("%s - Unknown parity mode, " | |
462 | "disabling parity", __FUNCTION__); | |
463 | cflag &= ~PARENB; | |
464 | bits &= ~BITS_PARITY_MASK; | |
39a66b8d | 465 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
466 | break; |
467 | } | |
468 | ||
469 | cflag &= ~CSTOPB; | |
470 | switch(bits & BITS_STOP_MASK) { | |
471 | case BITS_STOP_1: | |
472 | dbg("%s - stop bits = 1", __FUNCTION__); | |
473 | break; | |
474 | case BITS_STOP_1_5: | |
475 | dbg("%s - stop bits = 1.5 (not supported, " | |
39a66b8d | 476 | "using 1 stop bit)", __FUNCTION__); |
1da177e4 | 477 | bits &= ~BITS_STOP_MASK; |
39a66b8d | 478 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
479 | break; |
480 | case BITS_STOP_2: | |
481 | dbg("%s - stop bits = 2", __FUNCTION__); | |
482 | cflag |= CSTOPB; | |
483 | break; | |
484 | default: | |
485 | dbg("%s - Unknown number of stop bits, " | |
486 | "using 1 stop bit", __FUNCTION__); | |
487 | bits &= ~BITS_STOP_MASK; | |
39a66b8d | 488 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
489 | break; |
490 | } | |
491 | ||
39a66b8d CS |
492 | cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16); |
493 | if (modem_ctl[0] & 0x0008) { | |
494 | dbg("%s - flow control = CRTSCTS", __FUNCTION__); | |
495 | cflag |= CRTSCTS; | |
496 | } else { | |
497 | dbg("%s - flow control = NONE", __FUNCTION__); | |
498 | cflag &= ~CRTSCTS; | |
499 | } | |
500 | ||
1da177e4 LT |
501 | port->tty->termios->c_cflag = cflag; |
502 | } | |
503 | ||
504 | static void cp2101_set_termios (struct usb_serial_port *port, | |
505 | struct termios *old_termios) | |
506 | { | |
507 | unsigned int cflag, old_cflag=0; | |
39a66b8d CS |
508 | int baud=0, bits; |
509 | unsigned int modem_ctl[4]; | |
1da177e4 LT |
510 | |
511 | dbg("%s - port %d", __FUNCTION__, port->number); | |
512 | ||
513 | if ((!port->tty) || (!port->tty->termios)) { | |
514 | dbg("%s - no tty structures", __FUNCTION__); | |
515 | return; | |
516 | } | |
517 | cflag = port->tty->termios->c_cflag; | |
518 | ||
39a66b8d | 519 | /* Check that they really want us to change something */ |
1da177e4 LT |
520 | if (old_termios) { |
521 | if ((cflag == old_termios->c_cflag) && | |
522 | (RELEVANT_IFLAG(port->tty->termios->c_iflag) | |
523 | == RELEVANT_IFLAG(old_termios->c_iflag))) { | |
524 | dbg("%s - nothing to change...", __FUNCTION__); | |
525 | return; | |
526 | } | |
527 | ||
528 | old_cflag = old_termios->c_cflag; | |
529 | } | |
530 | ||
531 | /* If the baud rate is to be updated*/ | |
532 | if ((cflag & CBAUD) != (old_cflag & CBAUD)) { | |
533 | switch (cflag & CBAUD) { | |
39a66b8d CS |
534 | /* |
535 | * The baud rates which are commented out below | |
1da177e4 LT |
536 | * appear to be supported by the device |
537 | * but are non-standard | |
538 | */ | |
539 | case B0: baud = 0; break; | |
540 | case B600: baud = 600; break; | |
541 | case B1200: baud = 1200; break; | |
542 | case B1800: baud = 1800; break; | |
543 | case B2400: baud = 2400; break; | |
544 | case B4800: baud = 4800; break; | |
545 | /*case B7200: baud = 7200; break;*/ | |
546 | case B9600: baud = 9600; break; | |
547 | /*ase B14400: baud = 14400; break;*/ | |
548 | case B19200: baud = 19200; break; | |
549 | /*case B28800: baud = 28800; break;*/ | |
550 | case B38400: baud = 38400; break; | |
551 | /*case B55854: baud = 55054; break;*/ | |
552 | case B57600: baud = 57600; break; | |
553 | case B115200: baud = 115200; break; | |
554 | /*case B127117: baud = 127117; break;*/ | |
555 | case B230400: baud = 230400; break; | |
556 | case B460800: baud = 460800; break; | |
557 | case B921600: baud = 921600; break; | |
558 | /*case B3686400: baud = 3686400; break;*/ | |
559 | default: | |
560 | dev_err(&port->dev, "cp2101 driver does not " | |
561 | "support the baudrate requested\n"); | |
562 | break; | |
563 | } | |
564 | ||
565 | if (baud) { | |
566 | dbg("%s - Setting baud rate to %d baud", __FUNCTION__, | |
567 | baud); | |
39a66b8d | 568 | if (cp2101_set_config_single(port, CP2101_BAUDRATE, |
1da177e4 LT |
569 | (BAUD_RATE_GEN_FREQ / baud))) |
570 | dev_err(&port->dev, "Baud rate requested not " | |
571 | "supported by device\n"); | |
572 | } | |
573 | } | |
574 | ||
39a66b8d | 575 | /* If the number of data bits is to be updated */ |
1da177e4 | 576 | if ((cflag & CSIZE) != (old_cflag & CSIZE)) { |
39a66b8d | 577 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
578 | bits &= ~BITS_DATA_MASK; |
579 | switch (cflag & CSIZE) { | |
39a66b8d CS |
580 | case CS5: |
581 | bits |= BITS_DATA_5; | |
582 | dbg("%s - data bits = 5", __FUNCTION__); | |
583 | break; | |
1da177e4 LT |
584 | case CS6: |
585 | bits |= BITS_DATA_6; | |
586 | dbg("%s - data bits = 6", __FUNCTION__); | |
587 | break; | |
588 | case CS7: | |
589 | bits |= BITS_DATA_7; | |
590 | dbg("%s - data bits = 7", __FUNCTION__); | |
591 | break; | |
592 | case CS8: | |
593 | bits |= BITS_DATA_8; | |
594 | dbg("%s - data bits = 8", __FUNCTION__); | |
595 | break; | |
596 | /*case CS9: | |
597 | bits |= BITS_DATA_9; | |
598 | dbg("%s - data bits = 9", __FUNCTION__); | |
599 | break;*/ | |
600 | default: | |
601 | dev_err(&port->dev, "cp2101 driver does not " | |
602 | "support the number of bits requested," | |
603 | " using 8 bit mode\n"); | |
604 | bits |= BITS_DATA_8; | |
605 | break; | |
606 | } | |
39a66b8d | 607 | if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) |
1da177e4 LT |
608 | dev_err(&port->dev, "Number of data bits requested " |
609 | "not supported by device\n"); | |
610 | } | |
611 | ||
612 | if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { | |
39a66b8d | 613 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
614 | bits &= ~BITS_PARITY_MASK; |
615 | if (cflag & PARENB) { | |
616 | if (cflag & PARODD) { | |
617 | bits |= BITS_PARITY_ODD; | |
618 | dbg("%s - parity = ODD", __FUNCTION__); | |
619 | } else { | |
620 | bits |= BITS_PARITY_EVEN; | |
621 | dbg("%s - parity = EVEN", __FUNCTION__); | |
622 | } | |
623 | } | |
39a66b8d | 624 | if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) |
1da177e4 LT |
625 | dev_err(&port->dev, "Parity mode not supported " |
626 | "by device\n"); | |
627 | } | |
628 | ||
629 | if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { | |
39a66b8d | 630 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
631 | bits &= ~BITS_STOP_MASK; |
632 | if (cflag & CSTOPB) { | |
633 | bits |= BITS_STOP_2; | |
634 | dbg("%s - stop bits = 2", __FUNCTION__); | |
635 | } else { | |
636 | bits |= BITS_STOP_1; | |
637 | dbg("%s - stop bits = 1", __FUNCTION__); | |
638 | } | |
39a66b8d | 639 | if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) |
1da177e4 LT |
640 | dev_err(&port->dev, "Number of stop bits requested " |
641 | "not supported by device\n"); | |
642 | } | |
39a66b8d CS |
643 | |
644 | if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { | |
645 | cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16); | |
646 | dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", | |
647 | __FUNCTION__, modem_ctl[0], modem_ctl[1], | |
648 | modem_ctl[2], modem_ctl[3]); | |
649 | ||
650 | if (cflag & CRTSCTS) { | |
651 | modem_ctl[0] &= ~0x7B; | |
652 | modem_ctl[0] |= 0x09; | |
653 | modem_ctl[1] = 0x80; | |
654 | dbg("%s - flow control = CRTSCTS", __FUNCTION__); | |
655 | } else { | |
656 | modem_ctl[0] &= ~0x7B; | |
657 | modem_ctl[0] |= 0x01; | |
658 | modem_ctl[1] |= 0x40; | |
659 | dbg("%s - flow control = NONE", __FUNCTION__); | |
660 | } | |
661 | ||
662 | dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", | |
663 | __FUNCTION__, modem_ctl[0], modem_ctl[1], | |
664 | modem_ctl[2], modem_ctl[3]); | |
665 | cp2101_set_config(port, CP2101_MODEMCTL, modem_ctl, 16); | |
666 | } | |
667 | ||
668 | } | |
669 | ||
670 | static int cp2101_tiocmset (struct usb_serial_port *port, struct file *file, | |
671 | unsigned int set, unsigned int clear) | |
672 | { | |
673 | int control = 0; | |
674 | ||
675 | dbg("%s - port %d", __FUNCTION__, port->number); | |
676 | ||
677 | if (set & TIOCM_RTS) { | |
678 | control |= CONTROL_RTS; | |
679 | control |= CONTROL_WRITE_RTS; | |
680 | } | |
681 | if (set & TIOCM_DTR) { | |
682 | control |= CONTROL_DTR; | |
683 | control |= CONTROL_WRITE_DTR; | |
684 | } | |
685 | if (clear & TIOCM_RTS) { | |
686 | control &= ~CONTROL_RTS; | |
687 | control |= CONTROL_WRITE_RTS; | |
688 | } | |
689 | if (clear & TIOCM_DTR) { | |
690 | control &= ~CONTROL_DTR; | |
691 | control |= CONTROL_WRITE_DTR; | |
692 | } | |
693 | ||
694 | dbg("%s - control = 0x%.4x", __FUNCTION__, control); | |
695 | ||
696 | return cp2101_set_config(port, CP2101_CONTROL, &control, 2); | |
697 | ||
698 | } | |
699 | ||
700 | static int cp2101_tiocmget (struct usb_serial_port *port, struct file *file) | |
701 | { | |
702 | int control, result; | |
703 | ||
704 | dbg("%s - port %d", __FUNCTION__, port->number); | |
705 | ||
706 | cp2101_get_config(port, CP2101_CONTROL, &control, 1); | |
707 | ||
708 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
709 | |((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
710 | |((control & CONTROL_CTS) ? TIOCM_CTS : 0) | |
711 | |((control & CONTROL_DSR) ? TIOCM_DSR : 0) | |
712 | |((control & CONTROL_RING)? TIOCM_RI : 0) | |
713 | |((control & CONTROL_DCD) ? TIOCM_CD : 0); | |
714 | ||
715 | dbg("%s - control = 0x%.2x", __FUNCTION__, control); | |
716 | ||
717 | return result; | |
1da177e4 LT |
718 | } |
719 | ||
720 | static void cp2101_break_ctl (struct usb_serial_port *port, int break_state) | |
721 | { | |
39a66b8d | 722 | int state; |
1da177e4 LT |
723 | |
724 | dbg("%s - port %d", __FUNCTION__, port->number); | |
725 | if (break_state == 0) | |
726 | state = BREAK_OFF; | |
727 | else | |
728 | state = BREAK_ON; | |
729 | dbg("%s - turning break %s", __FUNCTION__, | |
730 | state==BREAK_OFF ? "off" : "on"); | |
39a66b8d | 731 | cp2101_set_config(port, CP2101_BREAK, &state, 2); |
1da177e4 LT |
732 | } |
733 | ||
734 | static int cp2101_startup (struct usb_serial *serial) | |
735 | { | |
39a66b8d | 736 | /* CP2101 buffers behave strangely unless device is reset */ |
1da177e4 LT |
737 | usb_reset_device(serial->dev); |
738 | return 0; | |
739 | } | |
740 | ||
741 | static void cp2101_shutdown (struct usb_serial *serial) | |
742 | { | |
743 | int i; | |
744 | ||
745 | dbg("%s", __FUNCTION__); | |
746 | ||
39a66b8d | 747 | /* Stop reads and writes on all ports */ |
1da177e4 LT |
748 | for (i=0; i < serial->num_ports; ++i) { |
749 | cp2101_cleanup(serial->port[i]); | |
750 | } | |
751 | } | |
752 | ||
753 | static int __init cp2101_init (void) | |
754 | { | |
755 | int retval; | |
756 | ||
757 | retval = usb_serial_register(&cp2101_device); | |
758 | if (retval) | |
39a66b8d | 759 | return retval; /* Failed to register */ |
1da177e4 LT |
760 | |
761 | retval = usb_register(&cp2101_driver); | |
762 | if (retval) { | |
39a66b8d | 763 | /* Failed to register */ |
1da177e4 LT |
764 | usb_serial_deregister(&cp2101_device); |
765 | return retval; | |
766 | } | |
767 | ||
39a66b8d | 768 | /* Success */ |
1da177e4 LT |
769 | info(DRIVER_DESC " " DRIVER_VERSION); |
770 | return 0; | |
771 | } | |
772 | ||
773 | static void __exit cp2101_exit (void) | |
774 | { | |
775 | usb_deregister (&cp2101_driver); | |
776 | usb_serial_deregister (&cp2101_device); | |
777 | } | |
778 | ||
779 | module_init(cp2101_init); | |
780 | module_exit(cp2101_exit); | |
781 | ||
782 | MODULE_DESCRIPTION(DRIVER_DESC); | |
783 | MODULE_VERSION(DRIVER_VERSION); | |
784 | MODULE_LICENSE("GPL"); | |
785 | ||
786 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
787 | MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); |