Commit | Line | Data |
---|---|---|
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*); | |
606d099c | 44 | static void cp2101_set_termios(struct usb_serial_port*, struct ktermios*); |
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 */ | |
78001e3d BS |
67 | { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ |
68 | { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ | |
69 | { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ | |
e988fc8a | 70 | { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ |
61926b97 | 71 | { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ |
e05998d5 | 72 | { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ |
b0ce84d5 | 73 | { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ |
39a66b8d | 74 | { } /* Terminating Entry */ |
1da177e4 LT |
75 | }; |
76 | ||
77 | MODULE_DEVICE_TABLE (usb, id_table); | |
78 | ||
79 | static struct usb_driver cp2101_driver = { | |
269bda1c | 80 | .name = "cp2101", |
1da177e4 LT |
81 | .probe = usb_serial_probe, |
82 | .disconnect = usb_serial_disconnect, | |
83 | .id_table = id_table, | |
ba9dc657 | 84 | .no_dynamic_id = 1, |
1da177e4 LT |
85 | }; |
86 | ||
ea65370d | 87 | static struct usb_serial_driver cp2101_device = { |
18fcac35 GKH |
88 | .driver = { |
89 | .owner = THIS_MODULE, | |
269bda1c | 90 | .name = "cp2101", |
18fcac35 | 91 | }, |
d9b1b787 | 92 | .usb_driver = &cp2101_driver, |
1da177e4 LT |
93 | .id_table = id_table, |
94 | .num_interrupt_in = 0, | |
95 | .num_bulk_in = 0, | |
96 | .num_bulk_out = 0, | |
97 | .num_ports = 1, | |
98 | .open = cp2101_open, | |
99 | .close = cp2101_close, | |
100 | .break_ctl = cp2101_break_ctl, | |
101 | .set_termios = cp2101_set_termios, | |
39a66b8d CS |
102 | .tiocmget = cp2101_tiocmget, |
103 | .tiocmset = cp2101_tiocmset, | |
1da177e4 LT |
104 | .attach = cp2101_startup, |
105 | .shutdown = cp2101_shutdown, | |
106 | }; | |
107 | ||
39a66b8d | 108 | /* Config request types */ |
1da177e4 LT |
109 | #define REQTYPE_HOST_TO_DEVICE 0x41 |
110 | #define REQTYPE_DEVICE_TO_HOST 0xc1 | |
111 | ||
39a66b8d CS |
112 | /* Config SET requests. To GET, add 1 to the request number */ |
113 | #define CP2101_UART 0x00 /* Enable / Disable */ | |
114 | #define CP2101_BAUDRATE 0x01 /* (BAUD_RATE_GEN_FREQ / baudrate) */ | |
115 | #define CP2101_BITS 0x03 /* 0x(0)(databits)(parity)(stopbits) */ | |
116 | #define CP2101_BREAK 0x05 /* On / Off */ | |
117 | #define CP2101_CONTROL 0x07 /* Flow control line states */ | |
118 | #define CP2101_MODEMCTL 0x13 /* Modem controls */ | |
119 | #define CP2101_CONFIG_6 0x19 /* 6 bytes of config data ??? */ | |
1da177e4 | 120 | |
39a66b8d | 121 | /* CP2101_UART */ |
1da177e4 LT |
122 | #define UART_ENABLE 0x0001 |
123 | #define UART_DISABLE 0x0000 | |
124 | ||
39a66b8d | 125 | /* CP2101_BAUDRATE */ |
1da177e4 LT |
126 | #define BAUD_RATE_GEN_FREQ 0x384000 |
127 | ||
39a66b8d | 128 | /* CP2101_BITS */ |
1da177e4 | 129 | #define BITS_DATA_MASK 0X0f00 |
39a66b8d | 130 | #define BITS_DATA_5 0X0500 |
1da177e4 LT |
131 | #define BITS_DATA_6 0X0600 |
132 | #define BITS_DATA_7 0X0700 | |
133 | #define BITS_DATA_8 0X0800 | |
134 | #define BITS_DATA_9 0X0900 | |
135 | ||
136 | #define BITS_PARITY_MASK 0x00f0 | |
137 | #define BITS_PARITY_NONE 0x0000 | |
138 | #define BITS_PARITY_ODD 0x0010 | |
139 | #define BITS_PARITY_EVEN 0x0020 | |
140 | #define BITS_PARITY_MARK 0x0030 | |
141 | #define BITS_PARITY_SPACE 0x0040 | |
142 | ||
143 | #define BITS_STOP_MASK 0x000f | |
144 | #define BITS_STOP_1 0x0000 | |
145 | #define BITS_STOP_1_5 0x0001 | |
146 | #define BITS_STOP_2 0x0002 | |
39a66b8d CS |
147 | |
148 | /* CP2101_BREAK */ | |
1da177e4 LT |
149 | #define BREAK_ON 0x0000 |
150 | #define BREAK_OFF 0x0001 | |
151 | ||
39a66b8d CS |
152 | /* CP2101_CONTROL */ |
153 | #define CONTROL_DTR 0x0001 | |
154 | #define CONTROL_RTS 0x0002 | |
155 | #define CONTROL_CTS 0x0010 | |
156 | #define CONTROL_DSR 0x0020 | |
157 | #define CONTROL_RING 0x0040 | |
158 | #define CONTROL_DCD 0x0080 | |
159 | #define CONTROL_WRITE_DTR 0x0100 | |
160 | #define CONTROL_WRITE_RTS 0x0200 | |
1da177e4 | 161 | |
39a66b8d CS |
162 | /* |
163 | * cp2101_get_config | |
164 | * Reads from the CP2101 configuration registers | |
165 | * 'size' is specified in bytes. | |
166 | * 'data' is a pointer to a pre-allocated array of integers large | |
167 | * enough to hold 'size' bytes (with 4 bytes to each integer) | |
168 | */ | |
169 | static int cp2101_get_config(struct usb_serial_port* port, u8 request, | |
170 | unsigned int *data, int size) | |
1da177e4 LT |
171 | { |
172 | struct usb_serial *serial = port->serial; | |
53ebb3b8 | 173 | __le32 *buf; |
39a66b8d CS |
174 | int result, i, length; |
175 | ||
176 | /* Number of integers required to contain the array */ | |
177 | length = (((size - 1) | 3) + 1)/4; | |
178 | ||
53ebb3b8 | 179 | buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); |
39a66b8d CS |
180 | if (!buf) { |
181 | dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__); | |
182 | return -ENOMEM; | |
183 | } | |
1da177e4 | 184 | |
39a66b8d | 185 | /* For get requests, the request number must be incremented */ |
1da177e4 LT |
186 | request++; |
187 | ||
39a66b8d | 188 | /* Issue the request, attempting to read 'size' bytes */ |
1da177e4 LT |
189 | result = usb_control_msg (serial->dev,usb_rcvctrlpipe (serial->dev, 0), |
190 | request, REQTYPE_DEVICE_TO_HOST, 0x0000, | |
39a66b8d | 191 | 0, buf, size, 300); |
1da177e4 | 192 | |
39a66b8d CS |
193 | /* Convert data into an array of integers */ |
194 | for (i=0; i<length; i++) | |
195 | data[i] = le32_to_cpu(buf[i]); | |
1da177e4 | 196 | |
39a66b8d | 197 | kfree(buf); |
1da177e4 | 198 | |
39a66b8d CS |
199 | if (result != size) { |
200 | dev_err(&port->dev, "%s - Unable to send config request, " | |
201 | "request=0x%x size=%d result=%d\n", | |
202 | __FUNCTION__, request, size, result); | |
203 | return -EPROTO; | |
204 | } | |
1da177e4 | 205 | |
39a66b8d | 206 | return 0; |
1da177e4 LT |
207 | } |
208 | ||
39a66b8d CS |
209 | /* |
210 | * cp2101_set_config | |
211 | * Writes to the CP2101 configuration registers | |
212 | * Values less than 16 bits wide are sent directly | |
213 | * 'size' is specified in bytes. | |
214 | */ | |
215 | static int cp2101_set_config(struct usb_serial_port* port, u8 request, | |
216 | unsigned int *data, int size) | |
1da177e4 LT |
217 | { |
218 | struct usb_serial *serial = port->serial; | |
53ebb3b8 | 219 | __le32 *buf; |
39a66b8d | 220 | int result, i, length; |
1da177e4 | 221 | |
39a66b8d CS |
222 | /* Number of integers required to contain the array */ |
223 | length = (((size - 1) | 3) + 1)/4; | |
224 | ||
53ebb3b8 | 225 | buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); |
39a66b8d CS |
226 | if (!buf) { |
227 | dev_err(&port->dev, "%s - out of memory.\n", | |
228 | __FUNCTION__); | |
229 | return -ENOMEM; | |
230 | } | |
231 | ||
232 | /* Array of integers into bytes */ | |
233 | for (i = 0; i < length; i++) | |
234 | buf[i] = cpu_to_le32(data[i]); | |
235 | ||
236 | if (size > 2) { | |
237 | result = usb_control_msg (serial->dev, | |
238 | usb_sndctrlpipe(serial->dev, 0), | |
239 | request, REQTYPE_HOST_TO_DEVICE, 0x0000, | |
240 | 0, buf, size, 300); | |
241 | } else { | |
242 | result = usb_control_msg (serial->dev, | |
243 | usb_sndctrlpipe(serial->dev, 0), | |
244 | request, REQTYPE_HOST_TO_DEVICE, data[0], | |
245 | 0, NULL, 0, 300); | |
1da177e4 LT |
246 | } |
247 | ||
39a66b8d CS |
248 | kfree(buf); |
249 | ||
250 | if ((size > 2 && result != size) || result < 0) { | |
251 | dev_err(&port->dev, "%s - Unable to send request, " | |
252 | "request=0x%x size=%d result=%d\n", | |
253 | __FUNCTION__, request, size, result); | |
254 | return -EPROTO; | |
255 | } | |
1da177e4 | 256 | |
39a66b8d CS |
257 | /* Single data value */ |
258 | result = usb_control_msg (serial->dev, | |
259 | usb_sndctrlpipe(serial->dev, 0), | |
260 | request, REQTYPE_HOST_TO_DEVICE, data[0], | |
261 | 0, NULL, 0, 300); | |
1da177e4 LT |
262 | return 0; |
263 | } | |
264 | ||
39a66b8d CS |
265 | /* |
266 | * cp2101_set_config_single | |
267 | * Convenience function for calling cp2101_set_config on single data values | |
268 | * without requiring an integer pointer | |
269 | */ | |
270 | static inline int cp2101_set_config_single(struct usb_serial_port* port, | |
271 | u8 request, unsigned int data) | |
272 | { | |
273 | return cp2101_set_config(port, request, &data, 2); | |
274 | } | |
275 | ||
1da177e4 LT |
276 | static int cp2101_open (struct usb_serial_port *port, struct file *filp) |
277 | { | |
278 | struct usb_serial *serial = port->serial; | |
279 | int result; | |
280 | ||
281 | dbg("%s - port %d", __FUNCTION__, port->number); | |
282 | ||
39a66b8d | 283 | if (cp2101_set_config_single(port, CP2101_UART, UART_ENABLE)) { |
1da177e4 LT |
284 | dev_err(&port->dev, "%s - Unable to enable UART\n", |
285 | __FUNCTION__); | |
286 | return -EPROTO; | |
287 | } | |
288 | ||
289 | /* Start reading from the device */ | |
290 | usb_fill_bulk_urb (port->read_urb, serial->dev, | |
291 | usb_rcvbulkpipe(serial->dev, | |
292 | port->bulk_in_endpointAddress), | |
293 | port->read_urb->transfer_buffer, | |
294 | port->read_urb->transfer_buffer_length, | |
295 | serial->type->read_bulk_callback, | |
296 | port); | |
297 | result = usb_submit_urb(port->read_urb, GFP_KERNEL); | |
298 | if (result) { | |
299 | dev_err(&port->dev, "%s - failed resubmitting read urb, " | |
300 | "error %d\n", __FUNCTION__, result); | |
301 | return result; | |
302 | } | |
303 | ||
39a66b8d | 304 | /* Configure the termios structure */ |
1da177e4 LT |
305 | cp2101_get_termios(port); |
306 | ||
39a66b8d CS |
307 | /* Set the DTR and RTS pins low */ |
308 | cp2101_tiocmset(port, NULL, TIOCM_DTR | TIOCM_RTS, 0); | |
309 | ||
1da177e4 LT |
310 | return 0; |
311 | } | |
312 | ||
313 | static void cp2101_cleanup (struct usb_serial_port *port) | |
314 | { | |
315 | struct usb_serial *serial = port->serial; | |
316 | ||
317 | dbg("%s - port %d", __FUNCTION__, port->number); | |
318 | ||
319 | if (serial->dev) { | |
320 | /* shutdown any bulk reads that might be going on */ | |
321 | if (serial->num_bulk_out) | |
322 | usb_kill_urb(port->write_urb); | |
323 | if (serial->num_bulk_in) | |
324 | usb_kill_urb(port->read_urb); | |
325 | } | |
326 | } | |
327 | ||
328 | static void cp2101_close (struct usb_serial_port *port, struct file * filp) | |
329 | { | |
330 | dbg("%s - port %d", __FUNCTION__, port->number); | |
331 | ||
332 | /* shutdown our urbs */ | |
333 | dbg("%s - shutting down urbs", __FUNCTION__); | |
334 | usb_kill_urb(port->write_urb); | |
335 | usb_kill_urb(port->read_urb); | |
336 | ||
39a66b8d | 337 | cp2101_set_config_single(port, CP2101_UART, UART_DISABLE); |
1da177e4 LT |
338 | } |
339 | ||
39a66b8d CS |
340 | /* |
341 | * cp2101_get_termios | |
342 | * Reads the baud rate, data bits, parity, stop bits and flow control mode | |
343 | * from the device, corrects any unsupported values, and configures the | |
344 | * termios structure to reflect the state of the device | |
345 | */ | |
1da177e4 LT |
346 | static void cp2101_get_termios (struct usb_serial_port *port) |
347 | { | |
39a66b8d | 348 | unsigned int cflag, modem_ctl[4]; |
1da177e4 LT |
349 | int baud; |
350 | int bits; | |
351 | ||
352 | dbg("%s - port %d", __FUNCTION__, port->number); | |
353 | ||
354 | if ((!port->tty) || (!port->tty->termios)) { | |
355 | dbg("%s - no tty structures", __FUNCTION__); | |
356 | return; | |
357 | } | |
358 | cflag = port->tty->termios->c_cflag; | |
359 | ||
39a66b8d CS |
360 | cp2101_get_config(port, CP2101_BAUDRATE, &baud, 2); |
361 | /* Convert to baudrate */ | |
1da177e4 LT |
362 | if (baud) |
363 | baud = BAUD_RATE_GEN_FREQ / baud; | |
364 | ||
365 | dbg("%s - baud rate = %d", __FUNCTION__, baud); | |
366 | cflag &= ~CBAUD; | |
367 | switch (baud) { | |
39a66b8d CS |
368 | /* |
369 | * The baud rates which are commented out below | |
1da177e4 LT |
370 | * appear to be supported by the device |
371 | * but are non-standard | |
372 | */ | |
373 | case 600: cflag |= B600; break; | |
374 | case 1200: cflag |= B1200; break; | |
375 | case 1800: cflag |= B1800; break; | |
376 | case 2400: cflag |= B2400; break; | |
377 | case 4800: cflag |= B4800; break; | |
378 | /*case 7200: cflag |= B7200; break;*/ | |
379 | case 9600: cflag |= B9600; break; | |
380 | /*case 14400: cflag |= B14400; break;*/ | |
381 | case 19200: cflag |= B19200; break; | |
382 | /*case 28800: cflag |= B28800; break;*/ | |
383 | case 38400: cflag |= B38400; break; | |
384 | /*case 55854: cflag |= B55054; break;*/ | |
385 | case 57600: cflag |= B57600; break; | |
386 | case 115200: cflag |= B115200; break; | |
387 | /*case 127117: cflag |= B127117; break;*/ | |
388 | case 230400: cflag |= B230400; break; | |
389 | case 460800: cflag |= B460800; break; | |
390 | case 921600: cflag |= B921600; break; | |
391 | /*case 3686400: cflag |= B3686400; break;*/ | |
392 | default: | |
393 | dbg("%s - Baud rate is not supported, " | |
394 | "using 9600 baud", __FUNCTION__); | |
395 | cflag |= B9600; | |
39a66b8d | 396 | cp2101_set_config_single(port, CP2101_BAUDRATE, |
1da177e4 LT |
397 | (BAUD_RATE_GEN_FREQ/9600)); |
398 | break; | |
399 | } | |
400 | ||
39a66b8d | 401 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
402 | cflag &= ~CSIZE; |
403 | switch(bits & BITS_DATA_MASK) { | |
39a66b8d CS |
404 | case BITS_DATA_5: |
405 | dbg("%s - data bits = 5", __FUNCTION__); | |
406 | cflag |= CS5; | |
407 | break; | |
1da177e4 LT |
408 | case BITS_DATA_6: |
409 | dbg("%s - data bits = 6", __FUNCTION__); | |
410 | cflag |= CS6; | |
411 | break; | |
412 | case BITS_DATA_7: | |
413 | dbg("%s - data bits = 7", __FUNCTION__); | |
414 | cflag |= CS7; | |
415 | break; | |
416 | case BITS_DATA_8: | |
417 | dbg("%s - data bits = 8", __FUNCTION__); | |
418 | cflag |= CS8; | |
419 | break; | |
420 | case BITS_DATA_9: | |
421 | dbg("%s - data bits = 9 (not supported, " | |
422 | "using 8 data bits)", __FUNCTION__); | |
423 | cflag |= CS8; | |
424 | bits &= ~BITS_DATA_MASK; | |
425 | bits |= BITS_DATA_8; | |
39a66b8d | 426 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
427 | break; |
428 | default: | |
429 | dbg("%s - Unknown number of data bits, " | |
430 | "using 8", __FUNCTION__); | |
431 | cflag |= CS8; | |
432 | bits &= ~BITS_DATA_MASK; | |
433 | bits |= BITS_DATA_8; | |
39a66b8d | 434 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
435 | break; |
436 | } | |
437 | ||
438 | switch(bits & BITS_PARITY_MASK) { | |
439 | case BITS_PARITY_NONE: | |
440 | dbg("%s - parity = NONE", __FUNCTION__); | |
441 | cflag &= ~PARENB; | |
442 | break; | |
443 | case BITS_PARITY_ODD: | |
444 | dbg("%s - parity = ODD", __FUNCTION__); | |
445 | cflag |= (PARENB|PARODD); | |
446 | break; | |
447 | case BITS_PARITY_EVEN: | |
448 | dbg("%s - parity = EVEN", __FUNCTION__); | |
449 | cflag &= ~PARODD; | |
450 | cflag |= PARENB; | |
451 | break; | |
452 | case BITS_PARITY_MARK: | |
453 | dbg("%s - parity = MARK (not supported, " | |
454 | "disabling parity)", __FUNCTION__); | |
455 | cflag &= ~PARENB; | |
456 | bits &= ~BITS_PARITY_MASK; | |
39a66b8d | 457 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
458 | break; |
459 | case BITS_PARITY_SPACE: | |
460 | dbg("%s - parity = SPACE (not supported, " | |
461 | "disabling parity)", __FUNCTION__); | |
462 | cflag &= ~PARENB; | |
463 | bits &= ~BITS_PARITY_MASK; | |
39a66b8d | 464 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
465 | break; |
466 | default: | |
467 | dbg("%s - Unknown parity mode, " | |
468 | "disabling parity", __FUNCTION__); | |
469 | cflag &= ~PARENB; | |
470 | bits &= ~BITS_PARITY_MASK; | |
39a66b8d | 471 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
472 | break; |
473 | } | |
474 | ||
475 | cflag &= ~CSTOPB; | |
476 | switch(bits & BITS_STOP_MASK) { | |
477 | case BITS_STOP_1: | |
478 | dbg("%s - stop bits = 1", __FUNCTION__); | |
479 | break; | |
480 | case BITS_STOP_1_5: | |
481 | dbg("%s - stop bits = 1.5 (not supported, " | |
39a66b8d | 482 | "using 1 stop bit)", __FUNCTION__); |
1da177e4 | 483 | bits &= ~BITS_STOP_MASK; |
39a66b8d | 484 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
485 | break; |
486 | case BITS_STOP_2: | |
487 | dbg("%s - stop bits = 2", __FUNCTION__); | |
488 | cflag |= CSTOPB; | |
489 | break; | |
490 | default: | |
491 | dbg("%s - Unknown number of stop bits, " | |
492 | "using 1 stop bit", __FUNCTION__); | |
493 | bits &= ~BITS_STOP_MASK; | |
39a66b8d | 494 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
495 | break; |
496 | } | |
497 | ||
39a66b8d CS |
498 | cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16); |
499 | if (modem_ctl[0] & 0x0008) { | |
500 | dbg("%s - flow control = CRTSCTS", __FUNCTION__); | |
501 | cflag |= CRTSCTS; | |
502 | } else { | |
503 | dbg("%s - flow control = NONE", __FUNCTION__); | |
504 | cflag &= ~CRTSCTS; | |
505 | } | |
506 | ||
1da177e4 LT |
507 | port->tty->termios->c_cflag = cflag; |
508 | } | |
509 | ||
510 | static void cp2101_set_termios (struct usb_serial_port *port, | |
606d099c | 511 | struct ktermios *old_termios) |
1da177e4 LT |
512 | { |
513 | unsigned int cflag, old_cflag=0; | |
39a66b8d CS |
514 | int baud=0, bits; |
515 | unsigned int modem_ctl[4]; | |
1da177e4 LT |
516 | |
517 | dbg("%s - port %d", __FUNCTION__, port->number); | |
518 | ||
519 | if ((!port->tty) || (!port->tty->termios)) { | |
520 | dbg("%s - no tty structures", __FUNCTION__); | |
521 | return; | |
522 | } | |
523 | cflag = port->tty->termios->c_cflag; | |
524 | ||
39a66b8d | 525 | /* Check that they really want us to change something */ |
1da177e4 LT |
526 | if (old_termios) { |
527 | if ((cflag == old_termios->c_cflag) && | |
528 | (RELEVANT_IFLAG(port->tty->termios->c_iflag) | |
529 | == RELEVANT_IFLAG(old_termios->c_iflag))) { | |
530 | dbg("%s - nothing to change...", __FUNCTION__); | |
531 | return; | |
532 | } | |
533 | ||
534 | old_cflag = old_termios->c_cflag; | |
535 | } | |
536 | ||
537 | /* If the baud rate is to be updated*/ | |
538 | if ((cflag & CBAUD) != (old_cflag & CBAUD)) { | |
539 | switch (cflag & CBAUD) { | |
39a66b8d CS |
540 | /* |
541 | * The baud rates which are commented out below | |
1da177e4 LT |
542 | * appear to be supported by the device |
543 | * but are non-standard | |
544 | */ | |
545 | case B0: baud = 0; break; | |
546 | case B600: baud = 600; break; | |
547 | case B1200: baud = 1200; break; | |
548 | case B1800: baud = 1800; break; | |
549 | case B2400: baud = 2400; break; | |
550 | case B4800: baud = 4800; break; | |
551 | /*case B7200: baud = 7200; break;*/ | |
552 | case B9600: baud = 9600; break; | |
553 | /*ase B14400: baud = 14400; break;*/ | |
554 | case B19200: baud = 19200; break; | |
555 | /*case B28800: baud = 28800; break;*/ | |
556 | case B38400: baud = 38400; break; | |
557 | /*case B55854: baud = 55054; break;*/ | |
558 | case B57600: baud = 57600; break; | |
559 | case B115200: baud = 115200; break; | |
560 | /*case B127117: baud = 127117; break;*/ | |
561 | case B230400: baud = 230400; break; | |
562 | case B460800: baud = 460800; break; | |
563 | case B921600: baud = 921600; break; | |
564 | /*case B3686400: baud = 3686400; break;*/ | |
565 | default: | |
566 | dev_err(&port->dev, "cp2101 driver does not " | |
567 | "support the baudrate requested\n"); | |
568 | break; | |
569 | } | |
570 | ||
571 | if (baud) { | |
572 | dbg("%s - Setting baud rate to %d baud", __FUNCTION__, | |
573 | baud); | |
39a66b8d | 574 | if (cp2101_set_config_single(port, CP2101_BAUDRATE, |
1da177e4 LT |
575 | (BAUD_RATE_GEN_FREQ / baud))) |
576 | dev_err(&port->dev, "Baud rate requested not " | |
577 | "supported by device\n"); | |
578 | } | |
579 | } | |
580 | ||
39a66b8d | 581 | /* If the number of data bits is to be updated */ |
1da177e4 | 582 | if ((cflag & CSIZE) != (old_cflag & CSIZE)) { |
39a66b8d | 583 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
584 | bits &= ~BITS_DATA_MASK; |
585 | switch (cflag & CSIZE) { | |
39a66b8d CS |
586 | case CS5: |
587 | bits |= BITS_DATA_5; | |
588 | dbg("%s - data bits = 5", __FUNCTION__); | |
589 | break; | |
1da177e4 LT |
590 | case CS6: |
591 | bits |= BITS_DATA_6; | |
592 | dbg("%s - data bits = 6", __FUNCTION__); | |
593 | break; | |
594 | case CS7: | |
595 | bits |= BITS_DATA_7; | |
596 | dbg("%s - data bits = 7", __FUNCTION__); | |
597 | break; | |
598 | case CS8: | |
599 | bits |= BITS_DATA_8; | |
600 | dbg("%s - data bits = 8", __FUNCTION__); | |
601 | break; | |
602 | /*case CS9: | |
603 | bits |= BITS_DATA_9; | |
604 | dbg("%s - data bits = 9", __FUNCTION__); | |
605 | break;*/ | |
606 | default: | |
607 | dev_err(&port->dev, "cp2101 driver does not " | |
608 | "support the number of bits requested," | |
609 | " using 8 bit mode\n"); | |
610 | bits |= BITS_DATA_8; | |
611 | break; | |
612 | } | |
39a66b8d | 613 | if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) |
1da177e4 LT |
614 | dev_err(&port->dev, "Number of data bits requested " |
615 | "not supported by device\n"); | |
616 | } | |
617 | ||
618 | if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { | |
39a66b8d | 619 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
620 | bits &= ~BITS_PARITY_MASK; |
621 | if (cflag & PARENB) { | |
622 | if (cflag & PARODD) { | |
623 | bits |= BITS_PARITY_ODD; | |
624 | dbg("%s - parity = ODD", __FUNCTION__); | |
625 | } else { | |
626 | bits |= BITS_PARITY_EVEN; | |
627 | dbg("%s - parity = EVEN", __FUNCTION__); | |
628 | } | |
629 | } | |
39a66b8d | 630 | if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) |
1da177e4 LT |
631 | dev_err(&port->dev, "Parity mode not supported " |
632 | "by device\n"); | |
633 | } | |
634 | ||
635 | if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { | |
39a66b8d | 636 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
637 | bits &= ~BITS_STOP_MASK; |
638 | if (cflag & CSTOPB) { | |
639 | bits |= BITS_STOP_2; | |
640 | dbg("%s - stop bits = 2", __FUNCTION__); | |
641 | } else { | |
642 | bits |= BITS_STOP_1; | |
643 | dbg("%s - stop bits = 1", __FUNCTION__); | |
644 | } | |
39a66b8d | 645 | if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) |
1da177e4 LT |
646 | dev_err(&port->dev, "Number of stop bits requested " |
647 | "not supported by device\n"); | |
648 | } | |
39a66b8d CS |
649 | |
650 | if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { | |
651 | cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16); | |
652 | dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", | |
653 | __FUNCTION__, modem_ctl[0], modem_ctl[1], | |
654 | modem_ctl[2], modem_ctl[3]); | |
655 | ||
656 | if (cflag & CRTSCTS) { | |
657 | modem_ctl[0] &= ~0x7B; | |
658 | modem_ctl[0] |= 0x09; | |
659 | modem_ctl[1] = 0x80; | |
660 | dbg("%s - flow control = CRTSCTS", __FUNCTION__); | |
661 | } else { | |
662 | modem_ctl[0] &= ~0x7B; | |
663 | modem_ctl[0] |= 0x01; | |
664 | modem_ctl[1] |= 0x40; | |
665 | dbg("%s - flow control = NONE", __FUNCTION__); | |
666 | } | |
667 | ||
668 | dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", | |
669 | __FUNCTION__, modem_ctl[0], modem_ctl[1], | |
670 | modem_ctl[2], modem_ctl[3]); | |
671 | cp2101_set_config(port, CP2101_MODEMCTL, modem_ctl, 16); | |
672 | } | |
673 | ||
674 | } | |
675 | ||
676 | static int cp2101_tiocmset (struct usb_serial_port *port, struct file *file, | |
677 | unsigned int set, unsigned int clear) | |
678 | { | |
679 | int control = 0; | |
680 | ||
681 | dbg("%s - port %d", __FUNCTION__, port->number); | |
682 | ||
683 | if (set & TIOCM_RTS) { | |
684 | control |= CONTROL_RTS; | |
685 | control |= CONTROL_WRITE_RTS; | |
686 | } | |
687 | if (set & TIOCM_DTR) { | |
688 | control |= CONTROL_DTR; | |
689 | control |= CONTROL_WRITE_DTR; | |
690 | } | |
691 | if (clear & TIOCM_RTS) { | |
692 | control &= ~CONTROL_RTS; | |
693 | control |= CONTROL_WRITE_RTS; | |
694 | } | |
695 | if (clear & TIOCM_DTR) { | |
696 | control &= ~CONTROL_DTR; | |
697 | control |= CONTROL_WRITE_DTR; | |
698 | } | |
699 | ||
700 | dbg("%s - control = 0x%.4x", __FUNCTION__, control); | |
701 | ||
702 | return cp2101_set_config(port, CP2101_CONTROL, &control, 2); | |
703 | ||
704 | } | |
705 | ||
706 | static int cp2101_tiocmget (struct usb_serial_port *port, struct file *file) | |
707 | { | |
708 | int control, result; | |
709 | ||
710 | dbg("%s - port %d", __FUNCTION__, port->number); | |
711 | ||
712 | cp2101_get_config(port, CP2101_CONTROL, &control, 1); | |
713 | ||
714 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
715 | |((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
716 | |((control & CONTROL_CTS) ? TIOCM_CTS : 0) | |
717 | |((control & CONTROL_DSR) ? TIOCM_DSR : 0) | |
718 | |((control & CONTROL_RING)? TIOCM_RI : 0) | |
719 | |((control & CONTROL_DCD) ? TIOCM_CD : 0); | |
720 | ||
721 | dbg("%s - control = 0x%.2x", __FUNCTION__, control); | |
722 | ||
723 | return result; | |
1da177e4 LT |
724 | } |
725 | ||
726 | static void cp2101_break_ctl (struct usb_serial_port *port, int break_state) | |
727 | { | |
39a66b8d | 728 | int state; |
1da177e4 LT |
729 | |
730 | dbg("%s - port %d", __FUNCTION__, port->number); | |
731 | if (break_state == 0) | |
732 | state = BREAK_OFF; | |
733 | else | |
734 | state = BREAK_ON; | |
735 | dbg("%s - turning break %s", __FUNCTION__, | |
736 | state==BREAK_OFF ? "off" : "on"); | |
39a66b8d | 737 | cp2101_set_config(port, CP2101_BREAK, &state, 2); |
1da177e4 LT |
738 | } |
739 | ||
740 | static int cp2101_startup (struct usb_serial *serial) | |
741 | { | |
39a66b8d | 742 | /* CP2101 buffers behave strangely unless device is reset */ |
1da177e4 LT |
743 | usb_reset_device(serial->dev); |
744 | return 0; | |
745 | } | |
746 | ||
747 | static void cp2101_shutdown (struct usb_serial *serial) | |
748 | { | |
749 | int i; | |
750 | ||
751 | dbg("%s", __FUNCTION__); | |
752 | ||
39a66b8d | 753 | /* Stop reads and writes on all ports */ |
1da177e4 LT |
754 | for (i=0; i < serial->num_ports; ++i) { |
755 | cp2101_cleanup(serial->port[i]); | |
756 | } | |
757 | } | |
758 | ||
759 | static int __init cp2101_init (void) | |
760 | { | |
761 | int retval; | |
762 | ||
763 | retval = usb_serial_register(&cp2101_device); | |
764 | if (retval) | |
39a66b8d | 765 | return retval; /* Failed to register */ |
1da177e4 LT |
766 | |
767 | retval = usb_register(&cp2101_driver); | |
768 | if (retval) { | |
39a66b8d | 769 | /* Failed to register */ |
1da177e4 LT |
770 | usb_serial_deregister(&cp2101_device); |
771 | return retval; | |
772 | } | |
773 | ||
39a66b8d | 774 | /* Success */ |
1da177e4 LT |
775 | info(DRIVER_DESC " " DRIVER_VERSION); |
776 | return 0; | |
777 | } | |
778 | ||
779 | static void __exit cp2101_exit (void) | |
780 | { | |
781 | usb_deregister (&cp2101_driver); | |
782 | usb_serial_deregister (&cp2101_device); | |
783 | } | |
784 | ||
785 | module_init(cp2101_init); | |
786 | module_exit(cp2101_exit); | |
787 | ||
788 | MODULE_DESCRIPTION(DRIVER_DESC); | |
789 | MODULE_VERSION(DRIVER_VERSION); | |
790 | MODULE_LICENSE("GPL"); | |
791 | ||
792 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
793 | MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); |