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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 | ||
1da177e4 LT |
20 | #include <linux/kernel.h> |
21 | #include <linux/errno.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/tty.h> | |
24 | #include <linux/tty_flip.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/moduleparam.h> | |
27 | #include <linux/usb.h> | |
28 | #include <asm/uaccess.h> | |
a969888c | 29 | #include <linux/usb/serial.h> |
1da177e4 LT |
30 | |
31 | /* | |
32 | * Version Information | |
33 | */ | |
59224f53 | 34 | #define DRIVER_VERSION "v0.07" |
1da177e4 LT |
35 | #define DRIVER_DESC "Silicon Labs CP2101/CP2102 RS232 serial adaptor driver" |
36 | ||
37 | /* | |
38 | * Function Prototypes | |
39 | */ | |
40 | static int cp2101_open(struct usb_serial_port*, struct file*); | |
41 | static void cp2101_cleanup(struct usb_serial_port*); | |
42 | static void cp2101_close(struct usb_serial_port*, struct file*); | |
43 | static void cp2101_get_termios(struct usb_serial_port*); | |
44 | static void cp2101_set_termios(struct usb_serial_port*, struct termios*); | |
39a66b8d CS |
45 | static int cp2101_tiocmget (struct usb_serial_port *, struct file *); |
46 | static int cp2101_tiocmset (struct usb_serial_port *, struct file *, | |
47 | unsigned int, unsigned int); | |
1da177e4 LT |
48 | static void cp2101_break_ctl(struct usb_serial_port*, int); |
49 | static int cp2101_startup (struct usb_serial *); | |
50 | static void cp2101_shutdown(struct usb_serial*); | |
51 | ||
52 | ||
53 | static int debug; | |
54 | ||
55 | static struct usb_device_id id_table [] = { | |
198b9517 | 56 | { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ |
198b9517 | 57 | { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ |
e988fc8a CS |
58 | { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ |
59 | { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ | |
59224f53 | 60 | { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ |
212a4b4e | 61 | { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ |
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 */ | |
61926b97 | 68 | { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ |
b0ce84d5 | 69 | { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ |
39a66b8d | 70 | { } /* Terminating Entry */ |
1da177e4 LT |
71 | }; |
72 | ||
73 | MODULE_DEVICE_TABLE (usb, id_table); | |
74 | ||
75 | static struct usb_driver cp2101_driver = { | |
269bda1c | 76 | .name = "cp2101", |
1da177e4 LT |
77 | .probe = usb_serial_probe, |
78 | .disconnect = usb_serial_disconnect, | |
79 | .id_table = id_table, | |
ba9dc657 | 80 | .no_dynamic_id = 1, |
1da177e4 LT |
81 | }; |
82 | ||
ea65370d | 83 | static struct usb_serial_driver cp2101_device = { |
18fcac35 GKH |
84 | .driver = { |
85 | .owner = THIS_MODULE, | |
269bda1c | 86 | .name = "cp2101", |
18fcac35 | 87 | }, |
1da177e4 LT |
88 | .id_table = id_table, |
89 | .num_interrupt_in = 0, | |
90 | .num_bulk_in = 0, | |
91 | .num_bulk_out = 0, | |
92 | .num_ports = 1, | |
93 | .open = cp2101_open, | |
94 | .close = cp2101_close, | |
95 | .break_ctl = cp2101_break_ctl, | |
96 | .set_termios = cp2101_set_termios, | |
39a66b8d CS |
97 | .tiocmget = cp2101_tiocmget, |
98 | .tiocmset = cp2101_tiocmset, | |
1da177e4 LT |
99 | .attach = cp2101_startup, |
100 | .shutdown = cp2101_shutdown, | |
101 | }; | |
102 | ||
39a66b8d | 103 | /* Config request types */ |
1da177e4 LT |
104 | #define REQTYPE_HOST_TO_DEVICE 0x41 |
105 | #define REQTYPE_DEVICE_TO_HOST 0xc1 | |
106 | ||
39a66b8d CS |
107 | /* Config SET requests. To GET, add 1 to the request number */ |
108 | #define CP2101_UART 0x00 /* Enable / Disable */ | |
109 | #define CP2101_BAUDRATE 0x01 /* (BAUD_RATE_GEN_FREQ / baudrate) */ | |
110 | #define CP2101_BITS 0x03 /* 0x(0)(databits)(parity)(stopbits) */ | |
111 | #define CP2101_BREAK 0x05 /* On / Off */ | |
112 | #define CP2101_CONTROL 0x07 /* Flow control line states */ | |
113 | #define CP2101_MODEMCTL 0x13 /* Modem controls */ | |
114 | #define CP2101_CONFIG_6 0x19 /* 6 bytes of config data ??? */ | |
1da177e4 | 115 | |
39a66b8d | 116 | /* CP2101_UART */ |
1da177e4 LT |
117 | #define UART_ENABLE 0x0001 |
118 | #define UART_DISABLE 0x0000 | |
119 | ||
39a66b8d | 120 | /* CP2101_BAUDRATE */ |
1da177e4 LT |
121 | #define BAUD_RATE_GEN_FREQ 0x384000 |
122 | ||
39a66b8d | 123 | /* CP2101_BITS */ |
1da177e4 | 124 | #define BITS_DATA_MASK 0X0f00 |
39a66b8d | 125 | #define BITS_DATA_5 0X0500 |
1da177e4 LT |
126 | #define BITS_DATA_6 0X0600 |
127 | #define BITS_DATA_7 0X0700 | |
128 | #define BITS_DATA_8 0X0800 | |
129 | #define BITS_DATA_9 0X0900 | |
130 | ||
131 | #define BITS_PARITY_MASK 0x00f0 | |
132 | #define BITS_PARITY_NONE 0x0000 | |
133 | #define BITS_PARITY_ODD 0x0010 | |
134 | #define BITS_PARITY_EVEN 0x0020 | |
135 | #define BITS_PARITY_MARK 0x0030 | |
136 | #define BITS_PARITY_SPACE 0x0040 | |
137 | ||
138 | #define BITS_STOP_MASK 0x000f | |
139 | #define BITS_STOP_1 0x0000 | |
140 | #define BITS_STOP_1_5 0x0001 | |
141 | #define BITS_STOP_2 0x0002 | |
39a66b8d CS |
142 | |
143 | /* CP2101_BREAK */ | |
1da177e4 LT |
144 | #define BREAK_ON 0x0000 |
145 | #define BREAK_OFF 0x0001 | |
146 | ||
39a66b8d CS |
147 | /* CP2101_CONTROL */ |
148 | #define CONTROL_DTR 0x0001 | |
149 | #define CONTROL_RTS 0x0002 | |
150 | #define CONTROL_CTS 0x0010 | |
151 | #define CONTROL_DSR 0x0020 | |
152 | #define CONTROL_RING 0x0040 | |
153 | #define CONTROL_DCD 0x0080 | |
154 | #define CONTROL_WRITE_DTR 0x0100 | |
155 | #define CONTROL_WRITE_RTS 0x0200 | |
1da177e4 | 156 | |
39a66b8d CS |
157 | /* |
158 | * cp2101_get_config | |
159 | * Reads from the CP2101 configuration registers | |
160 | * 'size' is specified in bytes. | |
161 | * 'data' is a pointer to a pre-allocated array of integers large | |
162 | * enough to hold 'size' bytes (with 4 bytes to each integer) | |
163 | */ | |
164 | static int cp2101_get_config(struct usb_serial_port* port, u8 request, | |
165 | unsigned int *data, int size) | |
1da177e4 LT |
166 | { |
167 | struct usb_serial *serial = port->serial; | |
39a66b8d CS |
168 | u32 *buf; |
169 | int result, i, length; | |
170 | ||
171 | /* Number of integers required to contain the array */ | |
172 | length = (((size - 1) | 3) + 1)/4; | |
173 | ||
80b6ca48 | 174 | buf = kcalloc(length, sizeof(u32), GFP_KERNEL); |
39a66b8d CS |
175 | if (!buf) { |
176 | dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__); | |
177 | return -ENOMEM; | |
178 | } | |
1da177e4 | 179 | |
39a66b8d | 180 | /* For get requests, the request number must be incremented */ |
1da177e4 LT |
181 | request++; |
182 | ||
39a66b8d | 183 | /* Issue the request, attempting to read 'size' bytes */ |
1da177e4 LT |
184 | result = usb_control_msg (serial->dev,usb_rcvctrlpipe (serial->dev, 0), |
185 | request, REQTYPE_DEVICE_TO_HOST, 0x0000, | |
39a66b8d | 186 | 0, buf, size, 300); |
1da177e4 | 187 | |
39a66b8d CS |
188 | /* Convert data into an array of integers */ |
189 | for (i=0; i<length; i++) | |
190 | data[i] = le32_to_cpu(buf[i]); | |
1da177e4 | 191 | |
39a66b8d | 192 | kfree(buf); |
1da177e4 | 193 | |
39a66b8d CS |
194 | if (result != size) { |
195 | dev_err(&port->dev, "%s - Unable to send config request, " | |
196 | "request=0x%x size=%d result=%d\n", | |
197 | __FUNCTION__, request, size, result); | |
198 | return -EPROTO; | |
199 | } | |
1da177e4 | 200 | |
39a66b8d | 201 | return 0; |
1da177e4 LT |
202 | } |
203 | ||
39a66b8d CS |
204 | /* |
205 | * cp2101_set_config | |
206 | * Writes to the CP2101 configuration registers | |
207 | * Values less than 16 bits wide are sent directly | |
208 | * 'size' is specified in bytes. | |
209 | */ | |
210 | static int cp2101_set_config(struct usb_serial_port* port, u8 request, | |
211 | unsigned int *data, int size) | |
1da177e4 LT |
212 | { |
213 | struct usb_serial *serial = port->serial; | |
39a66b8d CS |
214 | u32 *buf; |
215 | int result, i, length; | |
1da177e4 | 216 | |
39a66b8d CS |
217 | /* Number of integers required to contain the array */ |
218 | length = (((size - 1) | 3) + 1)/4; | |
219 | ||
220 | buf = kmalloc(length * sizeof(u32), GFP_KERNEL); | |
221 | if (!buf) { | |
222 | dev_err(&port->dev, "%s - out of memory.\n", | |
223 | __FUNCTION__); | |
224 | return -ENOMEM; | |
225 | } | |
226 | ||
227 | /* Array of integers into bytes */ | |
228 | for (i = 0; i < length; i++) | |
229 | buf[i] = cpu_to_le32(data[i]); | |
230 | ||
231 | if (size > 2) { | |
232 | result = usb_control_msg (serial->dev, | |
233 | usb_sndctrlpipe(serial->dev, 0), | |
234 | request, REQTYPE_HOST_TO_DEVICE, 0x0000, | |
235 | 0, buf, size, 300); | |
236 | } else { | |
237 | result = usb_control_msg (serial->dev, | |
238 | usb_sndctrlpipe(serial->dev, 0), | |
239 | request, REQTYPE_HOST_TO_DEVICE, data[0], | |
240 | 0, NULL, 0, 300); | |
1da177e4 LT |
241 | } |
242 | ||
39a66b8d CS |
243 | kfree(buf); |
244 | ||
245 | if ((size > 2 && result != size) || result < 0) { | |
246 | dev_err(&port->dev, "%s - Unable to send request, " | |
247 | "request=0x%x size=%d result=%d\n", | |
248 | __FUNCTION__, request, size, result); | |
249 | return -EPROTO; | |
250 | } | |
1da177e4 | 251 | |
39a66b8d CS |
252 | /* Single data value */ |
253 | result = usb_control_msg (serial->dev, | |
254 | usb_sndctrlpipe(serial->dev, 0), | |
255 | request, REQTYPE_HOST_TO_DEVICE, data[0], | |
256 | 0, NULL, 0, 300); | |
1da177e4 LT |
257 | return 0; |
258 | } | |
259 | ||
39a66b8d CS |
260 | /* |
261 | * cp2101_set_config_single | |
262 | * Convenience function for calling cp2101_set_config on single data values | |
263 | * without requiring an integer pointer | |
264 | */ | |
265 | static inline int cp2101_set_config_single(struct usb_serial_port* port, | |
266 | u8 request, unsigned int data) | |
267 | { | |
268 | return cp2101_set_config(port, request, &data, 2); | |
269 | } | |
270 | ||
1da177e4 LT |
271 | static int cp2101_open (struct usb_serial_port *port, struct file *filp) |
272 | { | |
273 | struct usb_serial *serial = port->serial; | |
274 | int result; | |
275 | ||
276 | dbg("%s - port %d", __FUNCTION__, port->number); | |
277 | ||
39a66b8d | 278 | if (cp2101_set_config_single(port, CP2101_UART, UART_ENABLE)) { |
1da177e4 LT |
279 | dev_err(&port->dev, "%s - Unable to enable UART\n", |
280 | __FUNCTION__); | |
281 | return -EPROTO; | |
282 | } | |
283 | ||
284 | /* Start reading from the device */ | |
285 | usb_fill_bulk_urb (port->read_urb, serial->dev, | |
286 | usb_rcvbulkpipe(serial->dev, | |
287 | port->bulk_in_endpointAddress), | |
288 | port->read_urb->transfer_buffer, | |
289 | port->read_urb->transfer_buffer_length, | |
290 | serial->type->read_bulk_callback, | |
291 | port); | |
292 | result = usb_submit_urb(port->read_urb, GFP_KERNEL); | |
293 | if (result) { | |
294 | dev_err(&port->dev, "%s - failed resubmitting read urb, " | |
295 | "error %d\n", __FUNCTION__, result); | |
296 | return result; | |
297 | } | |
298 | ||
39a66b8d | 299 | /* Configure the termios structure */ |
1da177e4 LT |
300 | cp2101_get_termios(port); |
301 | ||
39a66b8d CS |
302 | /* Set the DTR and RTS pins low */ |
303 | cp2101_tiocmset(port, NULL, TIOCM_DTR | TIOCM_RTS, 0); | |
304 | ||
1da177e4 LT |
305 | return 0; |
306 | } | |
307 | ||
308 | static void cp2101_cleanup (struct usb_serial_port *port) | |
309 | { | |
310 | struct usb_serial *serial = port->serial; | |
311 | ||
312 | dbg("%s - port %d", __FUNCTION__, port->number); | |
313 | ||
314 | if (serial->dev) { | |
315 | /* shutdown any bulk reads that might be going on */ | |
316 | if (serial->num_bulk_out) | |
317 | usb_kill_urb(port->write_urb); | |
318 | if (serial->num_bulk_in) | |
319 | usb_kill_urb(port->read_urb); | |
320 | } | |
321 | } | |
322 | ||
323 | static void cp2101_close (struct usb_serial_port *port, struct file * filp) | |
324 | { | |
325 | dbg("%s - port %d", __FUNCTION__, port->number); | |
326 | ||
327 | /* shutdown our urbs */ | |
328 | dbg("%s - shutting down urbs", __FUNCTION__); | |
329 | usb_kill_urb(port->write_urb); | |
330 | usb_kill_urb(port->read_urb); | |
331 | ||
39a66b8d | 332 | cp2101_set_config_single(port, CP2101_UART, UART_DISABLE); |
1da177e4 LT |
333 | } |
334 | ||
39a66b8d CS |
335 | /* |
336 | * cp2101_get_termios | |
337 | * Reads the baud rate, data bits, parity, stop bits and flow control mode | |
338 | * from the device, corrects any unsupported values, and configures the | |
339 | * termios structure to reflect the state of the device | |
340 | */ | |
1da177e4 LT |
341 | static void cp2101_get_termios (struct usb_serial_port *port) |
342 | { | |
39a66b8d | 343 | unsigned int cflag, modem_ctl[4]; |
1da177e4 LT |
344 | int baud; |
345 | int bits; | |
346 | ||
347 | dbg("%s - port %d", __FUNCTION__, port->number); | |
348 | ||
349 | if ((!port->tty) || (!port->tty->termios)) { | |
350 | dbg("%s - no tty structures", __FUNCTION__); | |
351 | return; | |
352 | } | |
353 | cflag = port->tty->termios->c_cflag; | |
354 | ||
39a66b8d CS |
355 | cp2101_get_config(port, CP2101_BAUDRATE, &baud, 2); |
356 | /* Convert to baudrate */ | |
1da177e4 LT |
357 | if (baud) |
358 | baud = BAUD_RATE_GEN_FREQ / baud; | |
359 | ||
360 | dbg("%s - baud rate = %d", __FUNCTION__, baud); | |
361 | cflag &= ~CBAUD; | |
362 | switch (baud) { | |
39a66b8d CS |
363 | /* |
364 | * The baud rates which are commented out below | |
1da177e4 LT |
365 | * appear to be supported by the device |
366 | * but are non-standard | |
367 | */ | |
368 | case 600: cflag |= B600; break; | |
369 | case 1200: cflag |= B1200; break; | |
370 | case 1800: cflag |= B1800; break; | |
371 | case 2400: cflag |= B2400; break; | |
372 | case 4800: cflag |= B4800; break; | |
373 | /*case 7200: cflag |= B7200; break;*/ | |
374 | case 9600: cflag |= B9600; break; | |
375 | /*case 14400: cflag |= B14400; break;*/ | |
376 | case 19200: cflag |= B19200; break; | |
377 | /*case 28800: cflag |= B28800; break;*/ | |
378 | case 38400: cflag |= B38400; break; | |
379 | /*case 55854: cflag |= B55054; break;*/ | |
380 | case 57600: cflag |= B57600; break; | |
381 | case 115200: cflag |= B115200; break; | |
382 | /*case 127117: cflag |= B127117; break;*/ | |
383 | case 230400: cflag |= B230400; break; | |
384 | case 460800: cflag |= B460800; break; | |
385 | case 921600: cflag |= B921600; break; | |
386 | /*case 3686400: cflag |= B3686400; break;*/ | |
387 | default: | |
388 | dbg("%s - Baud rate is not supported, " | |
389 | "using 9600 baud", __FUNCTION__); | |
390 | cflag |= B9600; | |
39a66b8d | 391 | cp2101_set_config_single(port, CP2101_BAUDRATE, |
1da177e4 LT |
392 | (BAUD_RATE_GEN_FREQ/9600)); |
393 | break; | |
394 | } | |
395 | ||
39a66b8d | 396 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
397 | cflag &= ~CSIZE; |
398 | switch(bits & BITS_DATA_MASK) { | |
39a66b8d CS |
399 | case BITS_DATA_5: |
400 | dbg("%s - data bits = 5", __FUNCTION__); | |
401 | cflag |= CS5; | |
402 | break; | |
1da177e4 LT |
403 | case BITS_DATA_6: |
404 | dbg("%s - data bits = 6", __FUNCTION__); | |
405 | cflag |= CS6; | |
406 | break; | |
407 | case BITS_DATA_7: | |
408 | dbg("%s - data bits = 7", __FUNCTION__); | |
409 | cflag |= CS7; | |
410 | break; | |
411 | case BITS_DATA_8: | |
412 | dbg("%s - data bits = 8", __FUNCTION__); | |
413 | cflag |= CS8; | |
414 | break; | |
415 | case BITS_DATA_9: | |
416 | dbg("%s - data bits = 9 (not supported, " | |
417 | "using 8 data bits)", __FUNCTION__); | |
418 | cflag |= CS8; | |
419 | bits &= ~BITS_DATA_MASK; | |
420 | bits |= BITS_DATA_8; | |
39a66b8d | 421 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
422 | break; |
423 | default: | |
424 | dbg("%s - Unknown number of data bits, " | |
425 | "using 8", __FUNCTION__); | |
426 | cflag |= CS8; | |
427 | bits &= ~BITS_DATA_MASK; | |
428 | bits |= BITS_DATA_8; | |
39a66b8d | 429 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
430 | break; |
431 | } | |
432 | ||
433 | switch(bits & BITS_PARITY_MASK) { | |
434 | case BITS_PARITY_NONE: | |
435 | dbg("%s - parity = NONE", __FUNCTION__); | |
436 | cflag &= ~PARENB; | |
437 | break; | |
438 | case BITS_PARITY_ODD: | |
439 | dbg("%s - parity = ODD", __FUNCTION__); | |
440 | cflag |= (PARENB|PARODD); | |
441 | break; | |
442 | case BITS_PARITY_EVEN: | |
443 | dbg("%s - parity = EVEN", __FUNCTION__); | |
444 | cflag &= ~PARODD; | |
445 | cflag |= PARENB; | |
446 | break; | |
447 | case BITS_PARITY_MARK: | |
448 | dbg("%s - parity = MARK (not supported, " | |
449 | "disabling parity)", __FUNCTION__); | |
450 | cflag &= ~PARENB; | |
451 | bits &= ~BITS_PARITY_MASK; | |
39a66b8d | 452 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
453 | break; |
454 | case BITS_PARITY_SPACE: | |
455 | dbg("%s - parity = SPACE (not supported, " | |
456 | "disabling parity)", __FUNCTION__); | |
457 | cflag &= ~PARENB; | |
458 | bits &= ~BITS_PARITY_MASK; | |
39a66b8d | 459 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
460 | break; |
461 | default: | |
462 | dbg("%s - Unknown parity mode, " | |
463 | "disabling parity", __FUNCTION__); | |
464 | cflag &= ~PARENB; | |
465 | bits &= ~BITS_PARITY_MASK; | |
39a66b8d | 466 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
467 | break; |
468 | } | |
469 | ||
470 | cflag &= ~CSTOPB; | |
471 | switch(bits & BITS_STOP_MASK) { | |
472 | case BITS_STOP_1: | |
473 | dbg("%s - stop bits = 1", __FUNCTION__); | |
474 | break; | |
475 | case BITS_STOP_1_5: | |
476 | dbg("%s - stop bits = 1.5 (not supported, " | |
39a66b8d | 477 | "using 1 stop bit)", __FUNCTION__); |
1da177e4 | 478 | bits &= ~BITS_STOP_MASK; |
39a66b8d | 479 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
480 | break; |
481 | case BITS_STOP_2: | |
482 | dbg("%s - stop bits = 2", __FUNCTION__); | |
483 | cflag |= CSTOPB; | |
484 | break; | |
485 | default: | |
486 | dbg("%s - Unknown number of stop bits, " | |
487 | "using 1 stop bit", __FUNCTION__); | |
488 | bits &= ~BITS_STOP_MASK; | |
39a66b8d | 489 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
490 | break; |
491 | } | |
492 | ||
39a66b8d CS |
493 | cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16); |
494 | if (modem_ctl[0] & 0x0008) { | |
495 | dbg("%s - flow control = CRTSCTS", __FUNCTION__); | |
496 | cflag |= CRTSCTS; | |
497 | } else { | |
498 | dbg("%s - flow control = NONE", __FUNCTION__); | |
499 | cflag &= ~CRTSCTS; | |
500 | } | |
501 | ||
1da177e4 LT |
502 | port->tty->termios->c_cflag = cflag; |
503 | } | |
504 | ||
505 | static void cp2101_set_termios (struct usb_serial_port *port, | |
506 | struct termios *old_termios) | |
507 | { | |
508 | unsigned int cflag, old_cflag=0; | |
39a66b8d CS |
509 | int baud=0, bits; |
510 | unsigned int modem_ctl[4]; | |
1da177e4 LT |
511 | |
512 | dbg("%s - port %d", __FUNCTION__, port->number); | |
513 | ||
514 | if ((!port->tty) || (!port->tty->termios)) { | |
515 | dbg("%s - no tty structures", __FUNCTION__); | |
516 | return; | |
517 | } | |
518 | cflag = port->tty->termios->c_cflag; | |
519 | ||
39a66b8d | 520 | /* Check that they really want us to change something */ |
1da177e4 LT |
521 | if (old_termios) { |
522 | if ((cflag == old_termios->c_cflag) && | |
523 | (RELEVANT_IFLAG(port->tty->termios->c_iflag) | |
524 | == RELEVANT_IFLAG(old_termios->c_iflag))) { | |
525 | dbg("%s - nothing to change...", __FUNCTION__); | |
526 | return; | |
527 | } | |
528 | ||
529 | old_cflag = old_termios->c_cflag; | |
530 | } | |
531 | ||
532 | /* If the baud rate is to be updated*/ | |
533 | if ((cflag & CBAUD) != (old_cflag & CBAUD)) { | |
534 | switch (cflag & CBAUD) { | |
39a66b8d CS |
535 | /* |
536 | * The baud rates which are commented out below | |
1da177e4 LT |
537 | * appear to be supported by the device |
538 | * but are non-standard | |
539 | */ | |
540 | case B0: baud = 0; break; | |
541 | case B600: baud = 600; break; | |
542 | case B1200: baud = 1200; break; | |
543 | case B1800: baud = 1800; break; | |
544 | case B2400: baud = 2400; break; | |
545 | case B4800: baud = 4800; break; | |
546 | /*case B7200: baud = 7200; break;*/ | |
547 | case B9600: baud = 9600; break; | |
548 | /*ase B14400: baud = 14400; break;*/ | |
549 | case B19200: baud = 19200; break; | |
550 | /*case B28800: baud = 28800; break;*/ | |
551 | case B38400: baud = 38400; break; | |
552 | /*case B55854: baud = 55054; break;*/ | |
553 | case B57600: baud = 57600; break; | |
554 | case B115200: baud = 115200; break; | |
555 | /*case B127117: baud = 127117; break;*/ | |
556 | case B230400: baud = 230400; break; | |
557 | case B460800: baud = 460800; break; | |
558 | case B921600: baud = 921600; break; | |
559 | /*case B3686400: baud = 3686400; break;*/ | |
560 | default: | |
561 | dev_err(&port->dev, "cp2101 driver does not " | |
562 | "support the baudrate requested\n"); | |
563 | break; | |
564 | } | |
565 | ||
566 | if (baud) { | |
567 | dbg("%s - Setting baud rate to %d baud", __FUNCTION__, | |
568 | baud); | |
39a66b8d | 569 | if (cp2101_set_config_single(port, CP2101_BAUDRATE, |
1da177e4 LT |
570 | (BAUD_RATE_GEN_FREQ / baud))) |
571 | dev_err(&port->dev, "Baud rate requested not " | |
572 | "supported by device\n"); | |
573 | } | |
574 | } | |
575 | ||
39a66b8d | 576 | /* If the number of data bits is to be updated */ |
1da177e4 | 577 | if ((cflag & CSIZE) != (old_cflag & CSIZE)) { |
39a66b8d | 578 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
579 | bits &= ~BITS_DATA_MASK; |
580 | switch (cflag & CSIZE) { | |
39a66b8d CS |
581 | case CS5: |
582 | bits |= BITS_DATA_5; | |
583 | dbg("%s - data bits = 5", __FUNCTION__); | |
584 | break; | |
1da177e4 LT |
585 | case CS6: |
586 | bits |= BITS_DATA_6; | |
587 | dbg("%s - data bits = 6", __FUNCTION__); | |
588 | break; | |
589 | case CS7: | |
590 | bits |= BITS_DATA_7; | |
591 | dbg("%s - data bits = 7", __FUNCTION__); | |
592 | break; | |
593 | case CS8: | |
594 | bits |= BITS_DATA_8; | |
595 | dbg("%s - data bits = 8", __FUNCTION__); | |
596 | break; | |
597 | /*case CS9: | |
598 | bits |= BITS_DATA_9; | |
599 | dbg("%s - data bits = 9", __FUNCTION__); | |
600 | break;*/ | |
601 | default: | |
602 | dev_err(&port->dev, "cp2101 driver does not " | |
603 | "support the number of bits requested," | |
604 | " using 8 bit mode\n"); | |
605 | bits |= BITS_DATA_8; | |
606 | break; | |
607 | } | |
39a66b8d | 608 | if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) |
1da177e4 LT |
609 | dev_err(&port->dev, "Number of data bits requested " |
610 | "not supported by device\n"); | |
611 | } | |
612 | ||
613 | if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { | |
39a66b8d | 614 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
615 | bits &= ~BITS_PARITY_MASK; |
616 | if (cflag & PARENB) { | |
617 | if (cflag & PARODD) { | |
618 | bits |= BITS_PARITY_ODD; | |
619 | dbg("%s - parity = ODD", __FUNCTION__); | |
620 | } else { | |
621 | bits |= BITS_PARITY_EVEN; | |
622 | dbg("%s - parity = EVEN", __FUNCTION__); | |
623 | } | |
624 | } | |
39a66b8d | 625 | if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) |
1da177e4 LT |
626 | dev_err(&port->dev, "Parity mode not supported " |
627 | "by device\n"); | |
628 | } | |
629 | ||
630 | if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { | |
39a66b8d | 631 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
632 | bits &= ~BITS_STOP_MASK; |
633 | if (cflag & CSTOPB) { | |
634 | bits |= BITS_STOP_2; | |
635 | dbg("%s - stop bits = 2", __FUNCTION__); | |
636 | } else { | |
637 | bits |= BITS_STOP_1; | |
638 | dbg("%s - stop bits = 1", __FUNCTION__); | |
639 | } | |
39a66b8d | 640 | if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) |
1da177e4 LT |
641 | dev_err(&port->dev, "Number of stop bits requested " |
642 | "not supported by device\n"); | |
643 | } | |
39a66b8d CS |
644 | |
645 | if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { | |
646 | cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16); | |
647 | dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", | |
648 | __FUNCTION__, modem_ctl[0], modem_ctl[1], | |
649 | modem_ctl[2], modem_ctl[3]); | |
650 | ||
651 | if (cflag & CRTSCTS) { | |
652 | modem_ctl[0] &= ~0x7B; | |
653 | modem_ctl[0] |= 0x09; | |
654 | modem_ctl[1] = 0x80; | |
655 | dbg("%s - flow control = CRTSCTS", __FUNCTION__); | |
656 | } else { | |
657 | modem_ctl[0] &= ~0x7B; | |
658 | modem_ctl[0] |= 0x01; | |
659 | modem_ctl[1] |= 0x40; | |
660 | dbg("%s - flow control = NONE", __FUNCTION__); | |
661 | } | |
662 | ||
663 | dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", | |
664 | __FUNCTION__, modem_ctl[0], modem_ctl[1], | |
665 | modem_ctl[2], modem_ctl[3]); | |
666 | cp2101_set_config(port, CP2101_MODEMCTL, modem_ctl, 16); | |
667 | } | |
668 | ||
669 | } | |
670 | ||
671 | static int cp2101_tiocmset (struct usb_serial_port *port, struct file *file, | |
672 | unsigned int set, unsigned int clear) | |
673 | { | |
674 | int control = 0; | |
675 | ||
676 | dbg("%s - port %d", __FUNCTION__, port->number); | |
677 | ||
678 | if (set & TIOCM_RTS) { | |
679 | control |= CONTROL_RTS; | |
680 | control |= CONTROL_WRITE_RTS; | |
681 | } | |
682 | if (set & TIOCM_DTR) { | |
683 | control |= CONTROL_DTR; | |
684 | control |= CONTROL_WRITE_DTR; | |
685 | } | |
686 | if (clear & TIOCM_RTS) { | |
687 | control &= ~CONTROL_RTS; | |
688 | control |= CONTROL_WRITE_RTS; | |
689 | } | |
690 | if (clear & TIOCM_DTR) { | |
691 | control &= ~CONTROL_DTR; | |
692 | control |= CONTROL_WRITE_DTR; | |
693 | } | |
694 | ||
695 | dbg("%s - control = 0x%.4x", __FUNCTION__, control); | |
696 | ||
697 | return cp2101_set_config(port, CP2101_CONTROL, &control, 2); | |
698 | ||
699 | } | |
700 | ||
701 | static int cp2101_tiocmget (struct usb_serial_port *port, struct file *file) | |
702 | { | |
703 | int control, result; | |
704 | ||
705 | dbg("%s - port %d", __FUNCTION__, port->number); | |
706 | ||
707 | cp2101_get_config(port, CP2101_CONTROL, &control, 1); | |
708 | ||
709 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
710 | |((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
711 | |((control & CONTROL_CTS) ? TIOCM_CTS : 0) | |
712 | |((control & CONTROL_DSR) ? TIOCM_DSR : 0) | |
713 | |((control & CONTROL_RING)? TIOCM_RI : 0) | |
714 | |((control & CONTROL_DCD) ? TIOCM_CD : 0); | |
715 | ||
716 | dbg("%s - control = 0x%.2x", __FUNCTION__, control); | |
717 | ||
718 | return result; | |
1da177e4 LT |
719 | } |
720 | ||
721 | static void cp2101_break_ctl (struct usb_serial_port *port, int break_state) | |
722 | { | |
39a66b8d | 723 | int state; |
1da177e4 LT |
724 | |
725 | dbg("%s - port %d", __FUNCTION__, port->number); | |
726 | if (break_state == 0) | |
727 | state = BREAK_OFF; | |
728 | else | |
729 | state = BREAK_ON; | |
730 | dbg("%s - turning break %s", __FUNCTION__, | |
731 | state==BREAK_OFF ? "off" : "on"); | |
39a66b8d | 732 | cp2101_set_config(port, CP2101_BREAK, &state, 2); |
1da177e4 LT |
733 | } |
734 | ||
735 | static int cp2101_startup (struct usb_serial *serial) | |
736 | { | |
39a66b8d | 737 | /* CP2101 buffers behave strangely unless device is reset */ |
1da177e4 LT |
738 | usb_reset_device(serial->dev); |
739 | return 0; | |
740 | } | |
741 | ||
742 | static void cp2101_shutdown (struct usb_serial *serial) | |
743 | { | |
744 | int i; | |
745 | ||
746 | dbg("%s", __FUNCTION__); | |
747 | ||
39a66b8d | 748 | /* Stop reads and writes on all ports */ |
1da177e4 LT |
749 | for (i=0; i < serial->num_ports; ++i) { |
750 | cp2101_cleanup(serial->port[i]); | |
751 | } | |
752 | } | |
753 | ||
754 | static int __init cp2101_init (void) | |
755 | { | |
756 | int retval; | |
757 | ||
758 | retval = usb_serial_register(&cp2101_device); | |
759 | if (retval) | |
39a66b8d | 760 | return retval; /* Failed to register */ |
1da177e4 LT |
761 | |
762 | retval = usb_register(&cp2101_driver); | |
763 | if (retval) { | |
39a66b8d | 764 | /* Failed to register */ |
1da177e4 LT |
765 | usb_serial_deregister(&cp2101_device); |
766 | return retval; | |
767 | } | |
768 | ||
39a66b8d | 769 | /* Success */ |
1da177e4 LT |
770 | info(DRIVER_DESC " " DRIVER_VERSION); |
771 | return 0; | |
772 | } | |
773 | ||
774 | static void __exit cp2101_exit (void) | |
775 | { | |
776 | usb_deregister (&cp2101_driver); | |
777 | usb_serial_deregister (&cp2101_device); | |
778 | } | |
779 | ||
780 | module_init(cp2101_init); | |
781 | module_exit(cp2101_exit); | |
782 | ||
783 | MODULE_DESCRIPTION(DRIVER_DESC); | |
784 | MODULE_VERSION(DRIVER_VERSION); | |
785 | MODULE_LICENSE("GPL"); | |
786 | ||
787 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
788 | MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); |