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 */ | |
fc4bd64c JH |
66 | { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ |
67 | { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ | |
e988fc8a | 68 | { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ |
78001e3d BS |
69 | { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ |
70 | { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ | |
71 | { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ | |
e988fc8a | 72 | { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ |
61926b97 | 73 | { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ |
ebaf494e | 74 | { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ |
e05998d5 | 75 | { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ |
b0ce84d5 | 76 | { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ |
39a66b8d | 77 | { } /* Terminating Entry */ |
1da177e4 LT |
78 | }; |
79 | ||
80 | MODULE_DEVICE_TABLE (usb, id_table); | |
81 | ||
82 | static struct usb_driver cp2101_driver = { | |
269bda1c | 83 | .name = "cp2101", |
1da177e4 LT |
84 | .probe = usb_serial_probe, |
85 | .disconnect = usb_serial_disconnect, | |
86 | .id_table = id_table, | |
ba9dc657 | 87 | .no_dynamic_id = 1, |
1da177e4 LT |
88 | }; |
89 | ||
ea65370d | 90 | static struct usb_serial_driver cp2101_device = { |
18fcac35 GKH |
91 | .driver = { |
92 | .owner = THIS_MODULE, | |
269bda1c | 93 | .name = "cp2101", |
18fcac35 | 94 | }, |
d9b1b787 | 95 | .usb_driver = &cp2101_driver, |
1da177e4 LT |
96 | .id_table = id_table, |
97 | .num_interrupt_in = 0, | |
98 | .num_bulk_in = 0, | |
99 | .num_bulk_out = 0, | |
100 | .num_ports = 1, | |
101 | .open = cp2101_open, | |
102 | .close = cp2101_close, | |
103 | .break_ctl = cp2101_break_ctl, | |
104 | .set_termios = cp2101_set_termios, | |
39a66b8d CS |
105 | .tiocmget = cp2101_tiocmget, |
106 | .tiocmset = cp2101_tiocmset, | |
1da177e4 LT |
107 | .attach = cp2101_startup, |
108 | .shutdown = cp2101_shutdown, | |
109 | }; | |
110 | ||
39a66b8d | 111 | /* Config request types */ |
1da177e4 LT |
112 | #define REQTYPE_HOST_TO_DEVICE 0x41 |
113 | #define REQTYPE_DEVICE_TO_HOST 0xc1 | |
114 | ||
39a66b8d CS |
115 | /* Config SET requests. To GET, add 1 to the request number */ |
116 | #define CP2101_UART 0x00 /* Enable / Disable */ | |
117 | #define CP2101_BAUDRATE 0x01 /* (BAUD_RATE_GEN_FREQ / baudrate) */ | |
118 | #define CP2101_BITS 0x03 /* 0x(0)(databits)(parity)(stopbits) */ | |
119 | #define CP2101_BREAK 0x05 /* On / Off */ | |
120 | #define CP2101_CONTROL 0x07 /* Flow control line states */ | |
121 | #define CP2101_MODEMCTL 0x13 /* Modem controls */ | |
122 | #define CP2101_CONFIG_6 0x19 /* 6 bytes of config data ??? */ | |
1da177e4 | 123 | |
39a66b8d | 124 | /* CP2101_UART */ |
1da177e4 LT |
125 | #define UART_ENABLE 0x0001 |
126 | #define UART_DISABLE 0x0000 | |
127 | ||
39a66b8d | 128 | /* CP2101_BAUDRATE */ |
1da177e4 LT |
129 | #define BAUD_RATE_GEN_FREQ 0x384000 |
130 | ||
39a66b8d | 131 | /* CP2101_BITS */ |
1da177e4 | 132 | #define BITS_DATA_MASK 0X0f00 |
39a66b8d | 133 | #define BITS_DATA_5 0X0500 |
1da177e4 LT |
134 | #define BITS_DATA_6 0X0600 |
135 | #define BITS_DATA_7 0X0700 | |
136 | #define BITS_DATA_8 0X0800 | |
137 | #define BITS_DATA_9 0X0900 | |
138 | ||
139 | #define BITS_PARITY_MASK 0x00f0 | |
140 | #define BITS_PARITY_NONE 0x0000 | |
141 | #define BITS_PARITY_ODD 0x0010 | |
142 | #define BITS_PARITY_EVEN 0x0020 | |
143 | #define BITS_PARITY_MARK 0x0030 | |
144 | #define BITS_PARITY_SPACE 0x0040 | |
145 | ||
146 | #define BITS_STOP_MASK 0x000f | |
147 | #define BITS_STOP_1 0x0000 | |
148 | #define BITS_STOP_1_5 0x0001 | |
149 | #define BITS_STOP_2 0x0002 | |
39a66b8d CS |
150 | |
151 | /* CP2101_BREAK */ | |
1da177e4 LT |
152 | #define BREAK_ON 0x0000 |
153 | #define BREAK_OFF 0x0001 | |
154 | ||
39a66b8d CS |
155 | /* CP2101_CONTROL */ |
156 | #define CONTROL_DTR 0x0001 | |
157 | #define CONTROL_RTS 0x0002 | |
158 | #define CONTROL_CTS 0x0010 | |
159 | #define CONTROL_DSR 0x0020 | |
160 | #define CONTROL_RING 0x0040 | |
161 | #define CONTROL_DCD 0x0080 | |
162 | #define CONTROL_WRITE_DTR 0x0100 | |
163 | #define CONTROL_WRITE_RTS 0x0200 | |
1da177e4 | 164 | |
39a66b8d CS |
165 | /* |
166 | * cp2101_get_config | |
167 | * Reads from the CP2101 configuration registers | |
168 | * 'size' is specified in bytes. | |
169 | * 'data' is a pointer to a pre-allocated array of integers large | |
170 | * enough to hold 'size' bytes (with 4 bytes to each integer) | |
171 | */ | |
172 | static int cp2101_get_config(struct usb_serial_port* port, u8 request, | |
173 | unsigned int *data, int size) | |
1da177e4 LT |
174 | { |
175 | struct usb_serial *serial = port->serial; | |
53ebb3b8 | 176 | __le32 *buf; |
39a66b8d CS |
177 | int result, i, length; |
178 | ||
179 | /* Number of integers required to contain the array */ | |
180 | length = (((size - 1) | 3) + 1)/4; | |
181 | ||
53ebb3b8 | 182 | buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); |
39a66b8d CS |
183 | if (!buf) { |
184 | dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__); | |
185 | return -ENOMEM; | |
186 | } | |
1da177e4 | 187 | |
39a66b8d | 188 | /* For get requests, the request number must be incremented */ |
1da177e4 LT |
189 | request++; |
190 | ||
39a66b8d | 191 | /* Issue the request, attempting to read 'size' bytes */ |
1da177e4 LT |
192 | result = usb_control_msg (serial->dev,usb_rcvctrlpipe (serial->dev, 0), |
193 | request, REQTYPE_DEVICE_TO_HOST, 0x0000, | |
39a66b8d | 194 | 0, buf, size, 300); |
1da177e4 | 195 | |
39a66b8d CS |
196 | /* Convert data into an array of integers */ |
197 | for (i=0; i<length; i++) | |
198 | data[i] = le32_to_cpu(buf[i]); | |
1da177e4 | 199 | |
39a66b8d | 200 | kfree(buf); |
1da177e4 | 201 | |
39a66b8d CS |
202 | if (result != size) { |
203 | dev_err(&port->dev, "%s - Unable to send config request, " | |
204 | "request=0x%x size=%d result=%d\n", | |
205 | __FUNCTION__, request, size, result); | |
206 | return -EPROTO; | |
207 | } | |
1da177e4 | 208 | |
39a66b8d | 209 | return 0; |
1da177e4 LT |
210 | } |
211 | ||
39a66b8d CS |
212 | /* |
213 | * cp2101_set_config | |
214 | * Writes to the CP2101 configuration registers | |
215 | * Values less than 16 bits wide are sent directly | |
216 | * 'size' is specified in bytes. | |
217 | */ | |
218 | static int cp2101_set_config(struct usb_serial_port* port, u8 request, | |
219 | unsigned int *data, int size) | |
1da177e4 LT |
220 | { |
221 | struct usb_serial *serial = port->serial; | |
53ebb3b8 | 222 | __le32 *buf; |
39a66b8d | 223 | int result, i, length; |
1da177e4 | 224 | |
39a66b8d CS |
225 | /* Number of integers required to contain the array */ |
226 | length = (((size - 1) | 3) + 1)/4; | |
227 | ||
53ebb3b8 | 228 | buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); |
39a66b8d CS |
229 | if (!buf) { |
230 | dev_err(&port->dev, "%s - out of memory.\n", | |
231 | __FUNCTION__); | |
232 | return -ENOMEM; | |
233 | } | |
234 | ||
235 | /* Array of integers into bytes */ | |
236 | for (i = 0; i < length; i++) | |
237 | buf[i] = cpu_to_le32(data[i]); | |
238 | ||
239 | if (size > 2) { | |
240 | result = usb_control_msg (serial->dev, | |
241 | usb_sndctrlpipe(serial->dev, 0), | |
242 | request, REQTYPE_HOST_TO_DEVICE, 0x0000, | |
243 | 0, buf, size, 300); | |
244 | } else { | |
245 | result = usb_control_msg (serial->dev, | |
246 | usb_sndctrlpipe(serial->dev, 0), | |
247 | request, REQTYPE_HOST_TO_DEVICE, data[0], | |
248 | 0, NULL, 0, 300); | |
1da177e4 LT |
249 | } |
250 | ||
39a66b8d CS |
251 | kfree(buf); |
252 | ||
253 | if ((size > 2 && result != size) || result < 0) { | |
254 | dev_err(&port->dev, "%s - Unable to send request, " | |
255 | "request=0x%x size=%d result=%d\n", | |
256 | __FUNCTION__, request, size, result); | |
257 | return -EPROTO; | |
258 | } | |
1da177e4 | 259 | |
39a66b8d CS |
260 | /* Single data value */ |
261 | result = usb_control_msg (serial->dev, | |
262 | usb_sndctrlpipe(serial->dev, 0), | |
263 | request, REQTYPE_HOST_TO_DEVICE, data[0], | |
264 | 0, NULL, 0, 300); | |
1da177e4 LT |
265 | return 0; |
266 | } | |
267 | ||
39a66b8d CS |
268 | /* |
269 | * cp2101_set_config_single | |
270 | * Convenience function for calling cp2101_set_config on single data values | |
271 | * without requiring an integer pointer | |
272 | */ | |
273 | static inline int cp2101_set_config_single(struct usb_serial_port* port, | |
274 | u8 request, unsigned int data) | |
275 | { | |
276 | return cp2101_set_config(port, request, &data, 2); | |
277 | } | |
278 | ||
1da177e4 LT |
279 | static int cp2101_open (struct usb_serial_port *port, struct file *filp) |
280 | { | |
281 | struct usb_serial *serial = port->serial; | |
282 | int result; | |
283 | ||
284 | dbg("%s - port %d", __FUNCTION__, port->number); | |
285 | ||
39a66b8d | 286 | if (cp2101_set_config_single(port, CP2101_UART, UART_ENABLE)) { |
1da177e4 LT |
287 | dev_err(&port->dev, "%s - Unable to enable UART\n", |
288 | __FUNCTION__); | |
289 | return -EPROTO; | |
290 | } | |
291 | ||
292 | /* Start reading from the device */ | |
293 | usb_fill_bulk_urb (port->read_urb, serial->dev, | |
294 | usb_rcvbulkpipe(serial->dev, | |
295 | port->bulk_in_endpointAddress), | |
296 | port->read_urb->transfer_buffer, | |
297 | port->read_urb->transfer_buffer_length, | |
298 | serial->type->read_bulk_callback, | |
299 | port); | |
300 | result = usb_submit_urb(port->read_urb, GFP_KERNEL); | |
301 | if (result) { | |
302 | dev_err(&port->dev, "%s - failed resubmitting read urb, " | |
303 | "error %d\n", __FUNCTION__, result); | |
304 | return result; | |
305 | } | |
306 | ||
39a66b8d | 307 | /* Configure the termios structure */ |
1da177e4 LT |
308 | cp2101_get_termios(port); |
309 | ||
39a66b8d CS |
310 | /* Set the DTR and RTS pins low */ |
311 | cp2101_tiocmset(port, NULL, TIOCM_DTR | TIOCM_RTS, 0); | |
312 | ||
1da177e4 LT |
313 | return 0; |
314 | } | |
315 | ||
316 | static void cp2101_cleanup (struct usb_serial_port *port) | |
317 | { | |
318 | struct usb_serial *serial = port->serial; | |
319 | ||
320 | dbg("%s - port %d", __FUNCTION__, port->number); | |
321 | ||
322 | if (serial->dev) { | |
323 | /* shutdown any bulk reads that might be going on */ | |
324 | if (serial->num_bulk_out) | |
325 | usb_kill_urb(port->write_urb); | |
326 | if (serial->num_bulk_in) | |
327 | usb_kill_urb(port->read_urb); | |
328 | } | |
329 | } | |
330 | ||
331 | static void cp2101_close (struct usb_serial_port *port, struct file * filp) | |
332 | { | |
333 | dbg("%s - port %d", __FUNCTION__, port->number); | |
334 | ||
335 | /* shutdown our urbs */ | |
336 | dbg("%s - shutting down urbs", __FUNCTION__); | |
337 | usb_kill_urb(port->write_urb); | |
338 | usb_kill_urb(port->read_urb); | |
339 | ||
39a66b8d | 340 | cp2101_set_config_single(port, CP2101_UART, UART_DISABLE); |
1da177e4 LT |
341 | } |
342 | ||
39a66b8d CS |
343 | /* |
344 | * cp2101_get_termios | |
345 | * Reads the baud rate, data bits, parity, stop bits and flow control mode | |
346 | * from the device, corrects any unsupported values, and configures the | |
347 | * termios structure to reflect the state of the device | |
348 | */ | |
1da177e4 LT |
349 | static void cp2101_get_termios (struct usb_serial_port *port) |
350 | { | |
39a66b8d | 351 | unsigned int cflag, modem_ctl[4]; |
1da177e4 LT |
352 | int baud; |
353 | int bits; | |
354 | ||
355 | dbg("%s - port %d", __FUNCTION__, port->number); | |
356 | ||
357 | if ((!port->tty) || (!port->tty->termios)) { | |
358 | dbg("%s - no tty structures", __FUNCTION__); | |
359 | return; | |
360 | } | |
361 | cflag = port->tty->termios->c_cflag; | |
362 | ||
39a66b8d CS |
363 | cp2101_get_config(port, CP2101_BAUDRATE, &baud, 2); |
364 | /* Convert to baudrate */ | |
1da177e4 LT |
365 | if (baud) |
366 | baud = BAUD_RATE_GEN_FREQ / baud; | |
367 | ||
368 | dbg("%s - baud rate = %d", __FUNCTION__, baud); | |
369 | cflag &= ~CBAUD; | |
370 | switch (baud) { | |
39a66b8d CS |
371 | /* |
372 | * The baud rates which are commented out below | |
1da177e4 LT |
373 | * appear to be supported by the device |
374 | * but are non-standard | |
375 | */ | |
376 | case 600: cflag |= B600; break; | |
377 | case 1200: cflag |= B1200; break; | |
378 | case 1800: cflag |= B1800; break; | |
379 | case 2400: cflag |= B2400; break; | |
380 | case 4800: cflag |= B4800; break; | |
381 | /*case 7200: cflag |= B7200; break;*/ | |
382 | case 9600: cflag |= B9600; break; | |
383 | /*case 14400: cflag |= B14400; break;*/ | |
384 | case 19200: cflag |= B19200; break; | |
385 | /*case 28800: cflag |= B28800; break;*/ | |
386 | case 38400: cflag |= B38400; break; | |
387 | /*case 55854: cflag |= B55054; break;*/ | |
388 | case 57600: cflag |= B57600; break; | |
389 | case 115200: cflag |= B115200; break; | |
390 | /*case 127117: cflag |= B127117; break;*/ | |
391 | case 230400: cflag |= B230400; break; | |
392 | case 460800: cflag |= B460800; break; | |
393 | case 921600: cflag |= B921600; break; | |
394 | /*case 3686400: cflag |= B3686400; break;*/ | |
395 | default: | |
396 | dbg("%s - Baud rate is not supported, " | |
397 | "using 9600 baud", __FUNCTION__); | |
398 | cflag |= B9600; | |
39a66b8d | 399 | cp2101_set_config_single(port, CP2101_BAUDRATE, |
1da177e4 LT |
400 | (BAUD_RATE_GEN_FREQ/9600)); |
401 | break; | |
402 | } | |
403 | ||
39a66b8d | 404 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
405 | cflag &= ~CSIZE; |
406 | switch(bits & BITS_DATA_MASK) { | |
39a66b8d CS |
407 | case BITS_DATA_5: |
408 | dbg("%s - data bits = 5", __FUNCTION__); | |
409 | cflag |= CS5; | |
410 | break; | |
1da177e4 LT |
411 | case BITS_DATA_6: |
412 | dbg("%s - data bits = 6", __FUNCTION__); | |
413 | cflag |= CS6; | |
414 | break; | |
415 | case BITS_DATA_7: | |
416 | dbg("%s - data bits = 7", __FUNCTION__); | |
417 | cflag |= CS7; | |
418 | break; | |
419 | case BITS_DATA_8: | |
420 | dbg("%s - data bits = 8", __FUNCTION__); | |
421 | cflag |= CS8; | |
422 | break; | |
423 | case BITS_DATA_9: | |
424 | dbg("%s - data bits = 9 (not supported, " | |
425 | "using 8 data bits)", __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 | default: | |
432 | dbg("%s - Unknown number of data bits, " | |
433 | "using 8", __FUNCTION__); | |
434 | cflag |= CS8; | |
435 | bits &= ~BITS_DATA_MASK; | |
436 | bits |= BITS_DATA_8; | |
39a66b8d | 437 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
438 | break; |
439 | } | |
440 | ||
441 | switch(bits & BITS_PARITY_MASK) { | |
442 | case BITS_PARITY_NONE: | |
443 | dbg("%s - parity = NONE", __FUNCTION__); | |
444 | cflag &= ~PARENB; | |
445 | break; | |
446 | case BITS_PARITY_ODD: | |
447 | dbg("%s - parity = ODD", __FUNCTION__); | |
448 | cflag |= (PARENB|PARODD); | |
449 | break; | |
450 | case BITS_PARITY_EVEN: | |
451 | dbg("%s - parity = EVEN", __FUNCTION__); | |
452 | cflag &= ~PARODD; | |
453 | cflag |= PARENB; | |
454 | break; | |
455 | case BITS_PARITY_MARK: | |
456 | dbg("%s - parity = MARK (not supported, " | |
457 | "disabling parity)", __FUNCTION__); | |
458 | cflag &= ~PARENB; | |
459 | bits &= ~BITS_PARITY_MASK; | |
39a66b8d | 460 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
461 | break; |
462 | case BITS_PARITY_SPACE: | |
463 | dbg("%s - parity = SPACE (not supported, " | |
464 | "disabling parity)", __FUNCTION__); | |
465 | cflag &= ~PARENB; | |
466 | bits &= ~BITS_PARITY_MASK; | |
39a66b8d | 467 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
468 | break; |
469 | default: | |
470 | dbg("%s - Unknown parity mode, " | |
471 | "disabling parity", __FUNCTION__); | |
472 | cflag &= ~PARENB; | |
473 | bits &= ~BITS_PARITY_MASK; | |
39a66b8d | 474 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
475 | break; |
476 | } | |
477 | ||
478 | cflag &= ~CSTOPB; | |
479 | switch(bits & BITS_STOP_MASK) { | |
480 | case BITS_STOP_1: | |
481 | dbg("%s - stop bits = 1", __FUNCTION__); | |
482 | break; | |
483 | case BITS_STOP_1_5: | |
484 | dbg("%s - stop bits = 1.5 (not supported, " | |
39a66b8d | 485 | "using 1 stop bit)", __FUNCTION__); |
1da177e4 | 486 | bits &= ~BITS_STOP_MASK; |
39a66b8d | 487 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
488 | break; |
489 | case BITS_STOP_2: | |
490 | dbg("%s - stop bits = 2", __FUNCTION__); | |
491 | cflag |= CSTOPB; | |
492 | break; | |
493 | default: | |
494 | dbg("%s - Unknown number of stop bits, " | |
495 | "using 1 stop bit", __FUNCTION__); | |
496 | bits &= ~BITS_STOP_MASK; | |
39a66b8d | 497 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
498 | break; |
499 | } | |
500 | ||
39a66b8d CS |
501 | cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16); |
502 | if (modem_ctl[0] & 0x0008) { | |
503 | dbg("%s - flow control = CRTSCTS", __FUNCTION__); | |
504 | cflag |= CRTSCTS; | |
505 | } else { | |
506 | dbg("%s - flow control = NONE", __FUNCTION__); | |
507 | cflag &= ~CRTSCTS; | |
508 | } | |
509 | ||
1da177e4 LT |
510 | port->tty->termios->c_cflag = cflag; |
511 | } | |
512 | ||
513 | static void cp2101_set_termios (struct usb_serial_port *port, | |
606d099c | 514 | struct ktermios *old_termios) |
1da177e4 LT |
515 | { |
516 | unsigned int cflag, old_cflag=0; | |
39a66b8d CS |
517 | int baud=0, bits; |
518 | unsigned int modem_ctl[4]; | |
1da177e4 LT |
519 | |
520 | dbg("%s - port %d", __FUNCTION__, port->number); | |
521 | ||
522 | if ((!port->tty) || (!port->tty->termios)) { | |
523 | dbg("%s - no tty structures", __FUNCTION__); | |
524 | return; | |
525 | } | |
526 | cflag = port->tty->termios->c_cflag; | |
527 | ||
39a66b8d | 528 | /* Check that they really want us to change something */ |
1da177e4 LT |
529 | if (old_termios) { |
530 | if ((cflag == old_termios->c_cflag) && | |
531 | (RELEVANT_IFLAG(port->tty->termios->c_iflag) | |
532 | == RELEVANT_IFLAG(old_termios->c_iflag))) { | |
533 | dbg("%s - nothing to change...", __FUNCTION__); | |
534 | return; | |
535 | } | |
536 | ||
537 | old_cflag = old_termios->c_cflag; | |
538 | } | |
539 | ||
540 | /* If the baud rate is to be updated*/ | |
541 | if ((cflag & CBAUD) != (old_cflag & CBAUD)) { | |
542 | switch (cflag & CBAUD) { | |
39a66b8d CS |
543 | /* |
544 | * The baud rates which are commented out below | |
1da177e4 LT |
545 | * appear to be supported by the device |
546 | * but are non-standard | |
547 | */ | |
548 | case B0: baud = 0; break; | |
549 | case B600: baud = 600; break; | |
550 | case B1200: baud = 1200; break; | |
551 | case B1800: baud = 1800; break; | |
552 | case B2400: baud = 2400; break; | |
553 | case B4800: baud = 4800; break; | |
554 | /*case B7200: baud = 7200; break;*/ | |
555 | case B9600: baud = 9600; break; | |
556 | /*ase B14400: baud = 14400; break;*/ | |
557 | case B19200: baud = 19200; break; | |
558 | /*case B28800: baud = 28800; break;*/ | |
559 | case B38400: baud = 38400; break; | |
560 | /*case B55854: baud = 55054; break;*/ | |
561 | case B57600: baud = 57600; break; | |
562 | case B115200: baud = 115200; break; | |
563 | /*case B127117: baud = 127117; break;*/ | |
564 | case B230400: baud = 230400; break; | |
565 | case B460800: baud = 460800; break; | |
566 | case B921600: baud = 921600; break; | |
567 | /*case B3686400: baud = 3686400; break;*/ | |
568 | default: | |
569 | dev_err(&port->dev, "cp2101 driver does not " | |
570 | "support the baudrate requested\n"); | |
571 | break; | |
572 | } | |
573 | ||
574 | if (baud) { | |
575 | dbg("%s - Setting baud rate to %d baud", __FUNCTION__, | |
576 | baud); | |
39a66b8d | 577 | if (cp2101_set_config_single(port, CP2101_BAUDRATE, |
1da177e4 LT |
578 | (BAUD_RATE_GEN_FREQ / baud))) |
579 | dev_err(&port->dev, "Baud rate requested not " | |
580 | "supported by device\n"); | |
581 | } | |
582 | } | |
583 | ||
39a66b8d | 584 | /* If the number of data bits is to be updated */ |
1da177e4 | 585 | if ((cflag & CSIZE) != (old_cflag & CSIZE)) { |
39a66b8d | 586 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
587 | bits &= ~BITS_DATA_MASK; |
588 | switch (cflag & CSIZE) { | |
39a66b8d CS |
589 | case CS5: |
590 | bits |= BITS_DATA_5; | |
591 | dbg("%s - data bits = 5", __FUNCTION__); | |
592 | break; | |
1da177e4 LT |
593 | case CS6: |
594 | bits |= BITS_DATA_6; | |
595 | dbg("%s - data bits = 6", __FUNCTION__); | |
596 | break; | |
597 | case CS7: | |
598 | bits |= BITS_DATA_7; | |
599 | dbg("%s - data bits = 7", __FUNCTION__); | |
600 | break; | |
601 | case CS8: | |
602 | bits |= BITS_DATA_8; | |
603 | dbg("%s - data bits = 8", __FUNCTION__); | |
604 | break; | |
605 | /*case CS9: | |
606 | bits |= BITS_DATA_9; | |
607 | dbg("%s - data bits = 9", __FUNCTION__); | |
608 | break;*/ | |
609 | default: | |
610 | dev_err(&port->dev, "cp2101 driver does not " | |
611 | "support the number of bits requested," | |
612 | " using 8 bit mode\n"); | |
613 | bits |= BITS_DATA_8; | |
614 | break; | |
615 | } | |
39a66b8d | 616 | if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) |
1da177e4 LT |
617 | dev_err(&port->dev, "Number of data bits requested " |
618 | "not supported by device\n"); | |
619 | } | |
620 | ||
621 | if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { | |
39a66b8d | 622 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
623 | bits &= ~BITS_PARITY_MASK; |
624 | if (cflag & PARENB) { | |
625 | if (cflag & PARODD) { | |
626 | bits |= BITS_PARITY_ODD; | |
627 | dbg("%s - parity = ODD", __FUNCTION__); | |
628 | } else { | |
629 | bits |= BITS_PARITY_EVEN; | |
630 | dbg("%s - parity = EVEN", __FUNCTION__); | |
631 | } | |
632 | } | |
39a66b8d | 633 | if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) |
1da177e4 LT |
634 | dev_err(&port->dev, "Parity mode not supported " |
635 | "by device\n"); | |
636 | } | |
637 | ||
638 | if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { | |
39a66b8d | 639 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
640 | bits &= ~BITS_STOP_MASK; |
641 | if (cflag & CSTOPB) { | |
642 | bits |= BITS_STOP_2; | |
643 | dbg("%s - stop bits = 2", __FUNCTION__); | |
644 | } else { | |
645 | bits |= BITS_STOP_1; | |
646 | dbg("%s - stop bits = 1", __FUNCTION__); | |
647 | } | |
39a66b8d | 648 | if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) |
1da177e4 LT |
649 | dev_err(&port->dev, "Number of stop bits requested " |
650 | "not supported by device\n"); | |
651 | } | |
39a66b8d CS |
652 | |
653 | if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { | |
654 | cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16); | |
655 | dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", | |
656 | __FUNCTION__, modem_ctl[0], modem_ctl[1], | |
657 | modem_ctl[2], modem_ctl[3]); | |
658 | ||
659 | if (cflag & CRTSCTS) { | |
660 | modem_ctl[0] &= ~0x7B; | |
661 | modem_ctl[0] |= 0x09; | |
662 | modem_ctl[1] = 0x80; | |
663 | dbg("%s - flow control = CRTSCTS", __FUNCTION__); | |
664 | } else { | |
665 | modem_ctl[0] &= ~0x7B; | |
666 | modem_ctl[0] |= 0x01; | |
667 | modem_ctl[1] |= 0x40; | |
668 | dbg("%s - flow control = NONE", __FUNCTION__); | |
669 | } | |
670 | ||
671 | dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", | |
672 | __FUNCTION__, modem_ctl[0], modem_ctl[1], | |
673 | modem_ctl[2], modem_ctl[3]); | |
674 | cp2101_set_config(port, CP2101_MODEMCTL, modem_ctl, 16); | |
675 | } | |
676 | ||
677 | } | |
678 | ||
679 | static int cp2101_tiocmset (struct usb_serial_port *port, struct file *file, | |
680 | unsigned int set, unsigned int clear) | |
681 | { | |
682 | int control = 0; | |
683 | ||
684 | dbg("%s - port %d", __FUNCTION__, port->number); | |
685 | ||
686 | if (set & TIOCM_RTS) { | |
687 | control |= CONTROL_RTS; | |
688 | control |= CONTROL_WRITE_RTS; | |
689 | } | |
690 | if (set & TIOCM_DTR) { | |
691 | control |= CONTROL_DTR; | |
692 | control |= CONTROL_WRITE_DTR; | |
693 | } | |
694 | if (clear & TIOCM_RTS) { | |
695 | control &= ~CONTROL_RTS; | |
696 | control |= CONTROL_WRITE_RTS; | |
697 | } | |
698 | if (clear & TIOCM_DTR) { | |
699 | control &= ~CONTROL_DTR; | |
700 | control |= CONTROL_WRITE_DTR; | |
701 | } | |
702 | ||
703 | dbg("%s - control = 0x%.4x", __FUNCTION__, control); | |
704 | ||
705 | return cp2101_set_config(port, CP2101_CONTROL, &control, 2); | |
706 | ||
707 | } | |
708 | ||
709 | static int cp2101_tiocmget (struct usb_serial_port *port, struct file *file) | |
710 | { | |
711 | int control, result; | |
712 | ||
713 | dbg("%s - port %d", __FUNCTION__, port->number); | |
714 | ||
715 | cp2101_get_config(port, CP2101_CONTROL, &control, 1); | |
716 | ||
717 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
718 | |((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
719 | |((control & CONTROL_CTS) ? TIOCM_CTS : 0) | |
720 | |((control & CONTROL_DSR) ? TIOCM_DSR : 0) | |
721 | |((control & CONTROL_RING)? TIOCM_RI : 0) | |
722 | |((control & CONTROL_DCD) ? TIOCM_CD : 0); | |
723 | ||
724 | dbg("%s - control = 0x%.2x", __FUNCTION__, control); | |
725 | ||
726 | return result; | |
1da177e4 LT |
727 | } |
728 | ||
729 | static void cp2101_break_ctl (struct usb_serial_port *port, int break_state) | |
730 | { | |
39a66b8d | 731 | int state; |
1da177e4 LT |
732 | |
733 | dbg("%s - port %d", __FUNCTION__, port->number); | |
734 | if (break_state == 0) | |
735 | state = BREAK_OFF; | |
736 | else | |
737 | state = BREAK_ON; | |
738 | dbg("%s - turning break %s", __FUNCTION__, | |
739 | state==BREAK_OFF ? "off" : "on"); | |
39a66b8d | 740 | cp2101_set_config(port, CP2101_BREAK, &state, 2); |
1da177e4 LT |
741 | } |
742 | ||
743 | static int cp2101_startup (struct usb_serial *serial) | |
744 | { | |
39a66b8d | 745 | /* CP2101 buffers behave strangely unless device is reset */ |
1da177e4 LT |
746 | usb_reset_device(serial->dev); |
747 | return 0; | |
748 | } | |
749 | ||
750 | static void cp2101_shutdown (struct usb_serial *serial) | |
751 | { | |
752 | int i; | |
753 | ||
754 | dbg("%s", __FUNCTION__); | |
755 | ||
39a66b8d | 756 | /* Stop reads and writes on all ports */ |
1da177e4 LT |
757 | for (i=0; i < serial->num_ports; ++i) { |
758 | cp2101_cleanup(serial->port[i]); | |
759 | } | |
760 | } | |
761 | ||
762 | static int __init cp2101_init (void) | |
763 | { | |
764 | int retval; | |
765 | ||
766 | retval = usb_serial_register(&cp2101_device); | |
767 | if (retval) | |
39a66b8d | 768 | return retval; /* Failed to register */ |
1da177e4 LT |
769 | |
770 | retval = usb_register(&cp2101_driver); | |
771 | if (retval) { | |
39a66b8d | 772 | /* Failed to register */ |
1da177e4 LT |
773 | usb_serial_deregister(&cp2101_device); |
774 | return retval; | |
775 | } | |
776 | ||
39a66b8d | 777 | /* Success */ |
1da177e4 LT |
778 | info(DRIVER_DESC " " DRIVER_VERSION); |
779 | return 0; | |
780 | } | |
781 | ||
782 | static void __exit cp2101_exit (void) | |
783 | { | |
784 | usb_deregister (&cp2101_driver); | |
785 | usb_serial_deregister (&cp2101_device); | |
786 | } | |
787 | ||
788 | module_init(cp2101_init); | |
789 | module_exit(cp2101_exit); | |
790 | ||
791 | MODULE_DESCRIPTION(DRIVER_DESC); | |
792 | MODULE_VERSION(DRIVER_VERSION); | |
793 | MODULE_LICENSE("GPL"); | |
794 | ||
795 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
796 | MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); |