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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*); | |
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 */ |
92f5cae2 | 61 | { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ |
212a4b4e | 62 | { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ |
e988fc8a CS |
63 | { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ |
64 | { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ | |
92f5cae2 | 65 | { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ |
e988fc8a CS |
66 | { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ |
67 | { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ | |
fc4bd64c JH |
68 | { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ |
69 | { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ | |
e988fc8a | 70 | { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ |
78001e3d BS |
71 | { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ |
72 | { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ | |
73 | { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ | |
e988fc8a | 74 | { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ |
61926b97 | 75 | { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ |
ebaf494e | 76 | { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ |
e05998d5 | 77 | { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ |
b0ce84d5 | 78 | { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ |
39a66b8d | 79 | { } /* Terminating Entry */ |
1da177e4 LT |
80 | }; |
81 | ||
82 | MODULE_DEVICE_TABLE (usb, id_table); | |
83 | ||
84 | static struct usb_driver cp2101_driver = { | |
269bda1c | 85 | .name = "cp2101", |
1da177e4 LT |
86 | .probe = usb_serial_probe, |
87 | .disconnect = usb_serial_disconnect, | |
88 | .id_table = id_table, | |
ba9dc657 | 89 | .no_dynamic_id = 1, |
1da177e4 LT |
90 | }; |
91 | ||
ea65370d | 92 | static struct usb_serial_driver cp2101_device = { |
18fcac35 GKH |
93 | .driver = { |
94 | .owner = THIS_MODULE, | |
269bda1c | 95 | .name = "cp2101", |
18fcac35 | 96 | }, |
d9b1b787 | 97 | .usb_driver = &cp2101_driver, |
1da177e4 LT |
98 | .id_table = id_table, |
99 | .num_interrupt_in = 0, | |
100 | .num_bulk_in = 0, | |
101 | .num_bulk_out = 0, | |
102 | .num_ports = 1, | |
103 | .open = cp2101_open, | |
104 | .close = cp2101_close, | |
105 | .break_ctl = cp2101_break_ctl, | |
106 | .set_termios = cp2101_set_termios, | |
39a66b8d CS |
107 | .tiocmget = cp2101_tiocmget, |
108 | .tiocmset = cp2101_tiocmset, | |
1da177e4 LT |
109 | .attach = cp2101_startup, |
110 | .shutdown = cp2101_shutdown, | |
111 | }; | |
112 | ||
39a66b8d | 113 | /* Config request types */ |
1da177e4 LT |
114 | #define REQTYPE_HOST_TO_DEVICE 0x41 |
115 | #define REQTYPE_DEVICE_TO_HOST 0xc1 | |
116 | ||
39a66b8d CS |
117 | /* Config SET requests. To GET, add 1 to the request number */ |
118 | #define CP2101_UART 0x00 /* Enable / Disable */ | |
119 | #define CP2101_BAUDRATE 0x01 /* (BAUD_RATE_GEN_FREQ / baudrate) */ | |
120 | #define CP2101_BITS 0x03 /* 0x(0)(databits)(parity)(stopbits) */ | |
121 | #define CP2101_BREAK 0x05 /* On / Off */ | |
122 | #define CP2101_CONTROL 0x07 /* Flow control line states */ | |
123 | #define CP2101_MODEMCTL 0x13 /* Modem controls */ | |
124 | #define CP2101_CONFIG_6 0x19 /* 6 bytes of config data ??? */ | |
1da177e4 | 125 | |
39a66b8d | 126 | /* CP2101_UART */ |
1da177e4 LT |
127 | #define UART_ENABLE 0x0001 |
128 | #define UART_DISABLE 0x0000 | |
129 | ||
39a66b8d | 130 | /* CP2101_BAUDRATE */ |
1da177e4 LT |
131 | #define BAUD_RATE_GEN_FREQ 0x384000 |
132 | ||
39a66b8d | 133 | /* CP2101_BITS */ |
1da177e4 | 134 | #define BITS_DATA_MASK 0X0f00 |
39a66b8d | 135 | #define BITS_DATA_5 0X0500 |
1da177e4 LT |
136 | #define BITS_DATA_6 0X0600 |
137 | #define BITS_DATA_7 0X0700 | |
138 | #define BITS_DATA_8 0X0800 | |
139 | #define BITS_DATA_9 0X0900 | |
140 | ||
141 | #define BITS_PARITY_MASK 0x00f0 | |
142 | #define BITS_PARITY_NONE 0x0000 | |
143 | #define BITS_PARITY_ODD 0x0010 | |
144 | #define BITS_PARITY_EVEN 0x0020 | |
145 | #define BITS_PARITY_MARK 0x0030 | |
146 | #define BITS_PARITY_SPACE 0x0040 | |
147 | ||
148 | #define BITS_STOP_MASK 0x000f | |
149 | #define BITS_STOP_1 0x0000 | |
150 | #define BITS_STOP_1_5 0x0001 | |
151 | #define BITS_STOP_2 0x0002 | |
39a66b8d CS |
152 | |
153 | /* CP2101_BREAK */ | |
1da177e4 LT |
154 | #define BREAK_ON 0x0000 |
155 | #define BREAK_OFF 0x0001 | |
156 | ||
39a66b8d CS |
157 | /* CP2101_CONTROL */ |
158 | #define CONTROL_DTR 0x0001 | |
159 | #define CONTROL_RTS 0x0002 | |
160 | #define CONTROL_CTS 0x0010 | |
161 | #define CONTROL_DSR 0x0020 | |
162 | #define CONTROL_RING 0x0040 | |
163 | #define CONTROL_DCD 0x0080 | |
164 | #define CONTROL_WRITE_DTR 0x0100 | |
165 | #define CONTROL_WRITE_RTS 0x0200 | |
1da177e4 | 166 | |
39a66b8d CS |
167 | /* |
168 | * cp2101_get_config | |
169 | * Reads from the CP2101 configuration registers | |
170 | * 'size' is specified in bytes. | |
171 | * 'data' is a pointer to a pre-allocated array of integers large | |
172 | * enough to hold 'size' bytes (with 4 bytes to each integer) | |
173 | */ | |
174 | static int cp2101_get_config(struct usb_serial_port* port, u8 request, | |
175 | unsigned int *data, int size) | |
1da177e4 LT |
176 | { |
177 | struct usb_serial *serial = port->serial; | |
53ebb3b8 | 178 | __le32 *buf; |
39a66b8d CS |
179 | int result, i, length; |
180 | ||
181 | /* Number of integers required to contain the array */ | |
182 | length = (((size - 1) | 3) + 1)/4; | |
183 | ||
53ebb3b8 | 184 | buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); |
39a66b8d CS |
185 | if (!buf) { |
186 | dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__); | |
187 | return -ENOMEM; | |
188 | } | |
1da177e4 | 189 | |
39a66b8d | 190 | /* For get requests, the request number must be incremented */ |
1da177e4 LT |
191 | request++; |
192 | ||
39a66b8d | 193 | /* Issue the request, attempting to read 'size' bytes */ |
1da177e4 LT |
194 | result = usb_control_msg (serial->dev,usb_rcvctrlpipe (serial->dev, 0), |
195 | request, REQTYPE_DEVICE_TO_HOST, 0x0000, | |
39a66b8d | 196 | 0, buf, size, 300); |
1da177e4 | 197 | |
39a66b8d CS |
198 | /* Convert data into an array of integers */ |
199 | for (i=0; i<length; i++) | |
200 | data[i] = le32_to_cpu(buf[i]); | |
1da177e4 | 201 | |
39a66b8d | 202 | kfree(buf); |
1da177e4 | 203 | |
39a66b8d CS |
204 | if (result != size) { |
205 | dev_err(&port->dev, "%s - Unable to send config request, " | |
206 | "request=0x%x size=%d result=%d\n", | |
207 | __FUNCTION__, request, size, result); | |
208 | return -EPROTO; | |
209 | } | |
1da177e4 | 210 | |
39a66b8d | 211 | return 0; |
1da177e4 LT |
212 | } |
213 | ||
39a66b8d CS |
214 | /* |
215 | * cp2101_set_config | |
216 | * Writes to the CP2101 configuration registers | |
217 | * Values less than 16 bits wide are sent directly | |
218 | * 'size' is specified in bytes. | |
219 | */ | |
220 | static int cp2101_set_config(struct usb_serial_port* port, u8 request, | |
221 | unsigned int *data, int size) | |
1da177e4 LT |
222 | { |
223 | struct usb_serial *serial = port->serial; | |
53ebb3b8 | 224 | __le32 *buf; |
39a66b8d | 225 | int result, i, length; |
1da177e4 | 226 | |
39a66b8d CS |
227 | /* Number of integers required to contain the array */ |
228 | length = (((size - 1) | 3) + 1)/4; | |
229 | ||
53ebb3b8 | 230 | buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); |
39a66b8d CS |
231 | if (!buf) { |
232 | dev_err(&port->dev, "%s - out of memory.\n", | |
233 | __FUNCTION__); | |
234 | return -ENOMEM; | |
235 | } | |
236 | ||
237 | /* Array of integers into bytes */ | |
238 | for (i = 0; i < length; i++) | |
239 | buf[i] = cpu_to_le32(data[i]); | |
240 | ||
241 | if (size > 2) { | |
242 | result = usb_control_msg (serial->dev, | |
243 | usb_sndctrlpipe(serial->dev, 0), | |
244 | request, REQTYPE_HOST_TO_DEVICE, 0x0000, | |
245 | 0, buf, size, 300); | |
246 | } else { | |
247 | result = usb_control_msg (serial->dev, | |
248 | usb_sndctrlpipe(serial->dev, 0), | |
249 | request, REQTYPE_HOST_TO_DEVICE, data[0], | |
250 | 0, NULL, 0, 300); | |
1da177e4 LT |
251 | } |
252 | ||
39a66b8d CS |
253 | kfree(buf); |
254 | ||
255 | if ((size > 2 && result != size) || result < 0) { | |
256 | dev_err(&port->dev, "%s - Unable to send request, " | |
257 | "request=0x%x size=%d result=%d\n", | |
258 | __FUNCTION__, request, size, result); | |
259 | return -EPROTO; | |
260 | } | |
1da177e4 | 261 | |
39a66b8d CS |
262 | /* Single data value */ |
263 | result = usb_control_msg (serial->dev, | |
264 | usb_sndctrlpipe(serial->dev, 0), | |
265 | request, REQTYPE_HOST_TO_DEVICE, data[0], | |
266 | 0, NULL, 0, 300); | |
1da177e4 LT |
267 | return 0; |
268 | } | |
269 | ||
39a66b8d CS |
270 | /* |
271 | * cp2101_set_config_single | |
272 | * Convenience function for calling cp2101_set_config on single data values | |
273 | * without requiring an integer pointer | |
274 | */ | |
275 | static inline int cp2101_set_config_single(struct usb_serial_port* port, | |
276 | u8 request, unsigned int data) | |
277 | { | |
278 | return cp2101_set_config(port, request, &data, 2); | |
279 | } | |
280 | ||
1da177e4 LT |
281 | static int cp2101_open (struct usb_serial_port *port, struct file *filp) |
282 | { | |
283 | struct usb_serial *serial = port->serial; | |
284 | int result; | |
285 | ||
286 | dbg("%s - port %d", __FUNCTION__, port->number); | |
287 | ||
39a66b8d | 288 | if (cp2101_set_config_single(port, CP2101_UART, UART_ENABLE)) { |
1da177e4 LT |
289 | dev_err(&port->dev, "%s - Unable to enable UART\n", |
290 | __FUNCTION__); | |
291 | return -EPROTO; | |
292 | } | |
293 | ||
294 | /* Start reading from the device */ | |
295 | usb_fill_bulk_urb (port->read_urb, serial->dev, | |
296 | usb_rcvbulkpipe(serial->dev, | |
297 | port->bulk_in_endpointAddress), | |
298 | port->read_urb->transfer_buffer, | |
299 | port->read_urb->transfer_buffer_length, | |
300 | serial->type->read_bulk_callback, | |
301 | port); | |
302 | result = usb_submit_urb(port->read_urb, GFP_KERNEL); | |
303 | if (result) { | |
304 | dev_err(&port->dev, "%s - failed resubmitting read urb, " | |
305 | "error %d\n", __FUNCTION__, result); | |
306 | return result; | |
307 | } | |
308 | ||
39a66b8d | 309 | /* Configure the termios structure */ |
1da177e4 LT |
310 | cp2101_get_termios(port); |
311 | ||
39a66b8d CS |
312 | /* Set the DTR and RTS pins low */ |
313 | cp2101_tiocmset(port, NULL, TIOCM_DTR | TIOCM_RTS, 0); | |
314 | ||
1da177e4 LT |
315 | return 0; |
316 | } | |
317 | ||
318 | static void cp2101_cleanup (struct usb_serial_port *port) | |
319 | { | |
320 | struct usb_serial *serial = port->serial; | |
321 | ||
322 | dbg("%s - port %d", __FUNCTION__, port->number); | |
323 | ||
324 | if (serial->dev) { | |
325 | /* shutdown any bulk reads that might be going on */ | |
326 | if (serial->num_bulk_out) | |
327 | usb_kill_urb(port->write_urb); | |
328 | if (serial->num_bulk_in) | |
329 | usb_kill_urb(port->read_urb); | |
330 | } | |
331 | } | |
332 | ||
333 | static void cp2101_close (struct usb_serial_port *port, struct file * filp) | |
334 | { | |
335 | dbg("%s - port %d", __FUNCTION__, port->number); | |
336 | ||
337 | /* shutdown our urbs */ | |
338 | dbg("%s - shutting down urbs", __FUNCTION__); | |
339 | usb_kill_urb(port->write_urb); | |
340 | usb_kill_urb(port->read_urb); | |
341 | ||
39a66b8d | 342 | cp2101_set_config_single(port, CP2101_UART, UART_DISABLE); |
1da177e4 LT |
343 | } |
344 | ||
39a66b8d CS |
345 | /* |
346 | * cp2101_get_termios | |
347 | * Reads the baud rate, data bits, parity, stop bits and flow control mode | |
348 | * from the device, corrects any unsupported values, and configures the | |
349 | * termios structure to reflect the state of the device | |
350 | */ | |
1da177e4 LT |
351 | static void cp2101_get_termios (struct usb_serial_port *port) |
352 | { | |
39a66b8d | 353 | unsigned int cflag, modem_ctl[4]; |
1da177e4 LT |
354 | int baud; |
355 | int bits; | |
356 | ||
357 | dbg("%s - port %d", __FUNCTION__, port->number); | |
358 | ||
359 | if ((!port->tty) || (!port->tty->termios)) { | |
360 | dbg("%s - no tty structures", __FUNCTION__); | |
361 | return; | |
362 | } | |
363 | cflag = port->tty->termios->c_cflag; | |
364 | ||
39a66b8d CS |
365 | cp2101_get_config(port, CP2101_BAUDRATE, &baud, 2); |
366 | /* Convert to baudrate */ | |
1da177e4 LT |
367 | if (baud) |
368 | baud = BAUD_RATE_GEN_FREQ / baud; | |
369 | ||
370 | dbg("%s - baud rate = %d", __FUNCTION__, baud); | |
371 | cflag &= ~CBAUD; | |
372 | switch (baud) { | |
39a66b8d CS |
373 | /* |
374 | * The baud rates which are commented out below | |
1da177e4 LT |
375 | * appear to be supported by the device |
376 | * but are non-standard | |
377 | */ | |
378 | case 600: cflag |= B600; break; | |
379 | case 1200: cflag |= B1200; break; | |
380 | case 1800: cflag |= B1800; break; | |
381 | case 2400: cflag |= B2400; break; | |
382 | case 4800: cflag |= B4800; break; | |
383 | /*case 7200: cflag |= B7200; break;*/ | |
384 | case 9600: cflag |= B9600; break; | |
385 | /*case 14400: cflag |= B14400; break;*/ | |
386 | case 19200: cflag |= B19200; break; | |
387 | /*case 28800: cflag |= B28800; break;*/ | |
388 | case 38400: cflag |= B38400; break; | |
389 | /*case 55854: cflag |= B55054; break;*/ | |
390 | case 57600: cflag |= B57600; break; | |
391 | case 115200: cflag |= B115200; break; | |
392 | /*case 127117: cflag |= B127117; break;*/ | |
393 | case 230400: cflag |= B230400; break; | |
394 | case 460800: cflag |= B460800; break; | |
395 | case 921600: cflag |= B921600; break; | |
396 | /*case 3686400: cflag |= B3686400; break;*/ | |
397 | default: | |
398 | dbg("%s - Baud rate is not supported, " | |
399 | "using 9600 baud", __FUNCTION__); | |
400 | cflag |= B9600; | |
39a66b8d | 401 | cp2101_set_config_single(port, CP2101_BAUDRATE, |
1da177e4 LT |
402 | (BAUD_RATE_GEN_FREQ/9600)); |
403 | break; | |
404 | } | |
405 | ||
39a66b8d | 406 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
407 | cflag &= ~CSIZE; |
408 | switch(bits & BITS_DATA_MASK) { | |
39a66b8d CS |
409 | case BITS_DATA_5: |
410 | dbg("%s - data bits = 5", __FUNCTION__); | |
411 | cflag |= CS5; | |
412 | break; | |
1da177e4 LT |
413 | case BITS_DATA_6: |
414 | dbg("%s - data bits = 6", __FUNCTION__); | |
415 | cflag |= CS6; | |
416 | break; | |
417 | case BITS_DATA_7: | |
418 | dbg("%s - data bits = 7", __FUNCTION__); | |
419 | cflag |= CS7; | |
420 | break; | |
421 | case BITS_DATA_8: | |
422 | dbg("%s - data bits = 8", __FUNCTION__); | |
423 | cflag |= CS8; | |
424 | break; | |
425 | case BITS_DATA_9: | |
426 | dbg("%s - data bits = 9 (not supported, " | |
427 | "using 8 data bits)", __FUNCTION__); | |
428 | cflag |= CS8; | |
429 | bits &= ~BITS_DATA_MASK; | |
430 | bits |= BITS_DATA_8; | |
39a66b8d | 431 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
432 | break; |
433 | default: | |
434 | dbg("%s - Unknown number of data bits, " | |
435 | "using 8", __FUNCTION__); | |
436 | cflag |= CS8; | |
437 | bits &= ~BITS_DATA_MASK; | |
438 | bits |= BITS_DATA_8; | |
39a66b8d | 439 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
440 | break; |
441 | } | |
442 | ||
443 | switch(bits & BITS_PARITY_MASK) { | |
444 | case BITS_PARITY_NONE: | |
445 | dbg("%s - parity = NONE", __FUNCTION__); | |
446 | cflag &= ~PARENB; | |
447 | break; | |
448 | case BITS_PARITY_ODD: | |
449 | dbg("%s - parity = ODD", __FUNCTION__); | |
450 | cflag |= (PARENB|PARODD); | |
451 | break; | |
452 | case BITS_PARITY_EVEN: | |
453 | dbg("%s - parity = EVEN", __FUNCTION__); | |
454 | cflag &= ~PARODD; | |
455 | cflag |= PARENB; | |
456 | break; | |
457 | case BITS_PARITY_MARK: | |
458 | dbg("%s - parity = MARK (not supported, " | |
459 | "disabling parity)", __FUNCTION__); | |
460 | cflag &= ~PARENB; | |
461 | bits &= ~BITS_PARITY_MASK; | |
39a66b8d | 462 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
463 | break; |
464 | case BITS_PARITY_SPACE: | |
465 | dbg("%s - parity = SPACE (not supported, " | |
466 | "disabling parity)", __FUNCTION__); | |
467 | cflag &= ~PARENB; | |
468 | bits &= ~BITS_PARITY_MASK; | |
39a66b8d | 469 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
470 | break; |
471 | default: | |
472 | dbg("%s - Unknown parity mode, " | |
473 | "disabling parity", __FUNCTION__); | |
474 | cflag &= ~PARENB; | |
475 | bits &= ~BITS_PARITY_MASK; | |
39a66b8d | 476 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
477 | break; |
478 | } | |
479 | ||
480 | cflag &= ~CSTOPB; | |
481 | switch(bits & BITS_STOP_MASK) { | |
482 | case BITS_STOP_1: | |
483 | dbg("%s - stop bits = 1", __FUNCTION__); | |
484 | break; | |
485 | case BITS_STOP_1_5: | |
486 | dbg("%s - stop bits = 1.5 (not supported, " | |
39a66b8d | 487 | "using 1 stop bit)", __FUNCTION__); |
1da177e4 | 488 | bits &= ~BITS_STOP_MASK; |
39a66b8d | 489 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
490 | break; |
491 | case BITS_STOP_2: | |
492 | dbg("%s - stop bits = 2", __FUNCTION__); | |
493 | cflag |= CSTOPB; | |
494 | break; | |
495 | default: | |
496 | dbg("%s - Unknown number of stop bits, " | |
497 | "using 1 stop bit", __FUNCTION__); | |
498 | bits &= ~BITS_STOP_MASK; | |
39a66b8d | 499 | cp2101_set_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
500 | break; |
501 | } | |
502 | ||
39a66b8d CS |
503 | cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16); |
504 | if (modem_ctl[0] & 0x0008) { | |
505 | dbg("%s - flow control = CRTSCTS", __FUNCTION__); | |
506 | cflag |= CRTSCTS; | |
507 | } else { | |
508 | dbg("%s - flow control = NONE", __FUNCTION__); | |
509 | cflag &= ~CRTSCTS; | |
510 | } | |
511 | ||
1da177e4 LT |
512 | port->tty->termios->c_cflag = cflag; |
513 | } | |
514 | ||
515 | static void cp2101_set_termios (struct usb_serial_port *port, | |
606d099c | 516 | struct ktermios *old_termios) |
1da177e4 LT |
517 | { |
518 | unsigned int cflag, old_cflag=0; | |
39a66b8d CS |
519 | int baud=0, bits; |
520 | unsigned int modem_ctl[4]; | |
1da177e4 LT |
521 | |
522 | dbg("%s - port %d", __FUNCTION__, port->number); | |
523 | ||
524 | if ((!port->tty) || (!port->tty->termios)) { | |
525 | dbg("%s - no tty structures", __FUNCTION__); | |
526 | return; | |
527 | } | |
528 | cflag = port->tty->termios->c_cflag; | |
529 | ||
39a66b8d | 530 | /* Check that they really want us to change something */ |
1da177e4 LT |
531 | if (old_termios) { |
532 | if ((cflag == old_termios->c_cflag) && | |
533 | (RELEVANT_IFLAG(port->tty->termios->c_iflag) | |
534 | == RELEVANT_IFLAG(old_termios->c_iflag))) { | |
535 | dbg("%s - nothing to change...", __FUNCTION__); | |
536 | return; | |
537 | } | |
538 | ||
539 | old_cflag = old_termios->c_cflag; | |
540 | } | |
541 | ||
542 | /* If the baud rate is to be updated*/ | |
543 | if ((cflag & CBAUD) != (old_cflag & CBAUD)) { | |
544 | switch (cflag & CBAUD) { | |
39a66b8d CS |
545 | /* |
546 | * The baud rates which are commented out below | |
1da177e4 LT |
547 | * appear to be supported by the device |
548 | * but are non-standard | |
549 | */ | |
550 | case B0: baud = 0; break; | |
551 | case B600: baud = 600; break; | |
552 | case B1200: baud = 1200; break; | |
553 | case B1800: baud = 1800; break; | |
554 | case B2400: baud = 2400; break; | |
555 | case B4800: baud = 4800; break; | |
556 | /*case B7200: baud = 7200; break;*/ | |
557 | case B9600: baud = 9600; break; | |
558 | /*ase B14400: baud = 14400; break;*/ | |
559 | case B19200: baud = 19200; break; | |
560 | /*case B28800: baud = 28800; break;*/ | |
561 | case B38400: baud = 38400; break; | |
562 | /*case B55854: baud = 55054; break;*/ | |
563 | case B57600: baud = 57600; break; | |
564 | case B115200: baud = 115200; break; | |
565 | /*case B127117: baud = 127117; break;*/ | |
566 | case B230400: baud = 230400; break; | |
567 | case B460800: baud = 460800; break; | |
568 | case B921600: baud = 921600; break; | |
569 | /*case B3686400: baud = 3686400; break;*/ | |
570 | default: | |
571 | dev_err(&port->dev, "cp2101 driver does not " | |
572 | "support the baudrate requested\n"); | |
573 | break; | |
574 | } | |
575 | ||
576 | if (baud) { | |
577 | dbg("%s - Setting baud rate to %d baud", __FUNCTION__, | |
578 | baud); | |
39a66b8d | 579 | if (cp2101_set_config_single(port, CP2101_BAUDRATE, |
1da177e4 LT |
580 | (BAUD_RATE_GEN_FREQ / baud))) |
581 | dev_err(&port->dev, "Baud rate requested not " | |
582 | "supported by device\n"); | |
583 | } | |
584 | } | |
585 | ||
39a66b8d | 586 | /* If the number of data bits is to be updated */ |
1da177e4 | 587 | if ((cflag & CSIZE) != (old_cflag & CSIZE)) { |
39a66b8d | 588 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
589 | bits &= ~BITS_DATA_MASK; |
590 | switch (cflag & CSIZE) { | |
39a66b8d CS |
591 | case CS5: |
592 | bits |= BITS_DATA_5; | |
593 | dbg("%s - data bits = 5", __FUNCTION__); | |
594 | break; | |
1da177e4 LT |
595 | case CS6: |
596 | bits |= BITS_DATA_6; | |
597 | dbg("%s - data bits = 6", __FUNCTION__); | |
598 | break; | |
599 | case CS7: | |
600 | bits |= BITS_DATA_7; | |
601 | dbg("%s - data bits = 7", __FUNCTION__); | |
602 | break; | |
603 | case CS8: | |
604 | bits |= BITS_DATA_8; | |
605 | dbg("%s - data bits = 8", __FUNCTION__); | |
606 | break; | |
607 | /*case CS9: | |
608 | bits |= BITS_DATA_9; | |
609 | dbg("%s - data bits = 9", __FUNCTION__); | |
610 | break;*/ | |
611 | default: | |
612 | dev_err(&port->dev, "cp2101 driver does not " | |
613 | "support the number of bits requested," | |
614 | " using 8 bit mode\n"); | |
615 | bits |= BITS_DATA_8; | |
616 | break; | |
617 | } | |
39a66b8d | 618 | if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) |
1da177e4 LT |
619 | dev_err(&port->dev, "Number of data bits requested " |
620 | "not supported by device\n"); | |
621 | } | |
622 | ||
623 | if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { | |
39a66b8d | 624 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
625 | bits &= ~BITS_PARITY_MASK; |
626 | if (cflag & PARENB) { | |
627 | if (cflag & PARODD) { | |
628 | bits |= BITS_PARITY_ODD; | |
629 | dbg("%s - parity = ODD", __FUNCTION__); | |
630 | } else { | |
631 | bits |= BITS_PARITY_EVEN; | |
632 | dbg("%s - parity = EVEN", __FUNCTION__); | |
633 | } | |
634 | } | |
39a66b8d | 635 | if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) |
1da177e4 LT |
636 | dev_err(&port->dev, "Parity mode not supported " |
637 | "by device\n"); | |
638 | } | |
639 | ||
640 | if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { | |
39a66b8d | 641 | cp2101_get_config(port, CP2101_BITS, &bits, 2); |
1da177e4 LT |
642 | bits &= ~BITS_STOP_MASK; |
643 | if (cflag & CSTOPB) { | |
644 | bits |= BITS_STOP_2; | |
645 | dbg("%s - stop bits = 2", __FUNCTION__); | |
646 | } else { | |
647 | bits |= BITS_STOP_1; | |
648 | dbg("%s - stop bits = 1", __FUNCTION__); | |
649 | } | |
39a66b8d | 650 | if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) |
1da177e4 LT |
651 | dev_err(&port->dev, "Number of stop bits requested " |
652 | "not supported by device\n"); | |
653 | } | |
39a66b8d CS |
654 | |
655 | if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { | |
656 | cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16); | |
657 | dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", | |
658 | __FUNCTION__, modem_ctl[0], modem_ctl[1], | |
659 | modem_ctl[2], modem_ctl[3]); | |
660 | ||
661 | if (cflag & CRTSCTS) { | |
662 | modem_ctl[0] &= ~0x7B; | |
663 | modem_ctl[0] |= 0x09; | |
664 | modem_ctl[1] = 0x80; | |
665 | dbg("%s - flow control = CRTSCTS", __FUNCTION__); | |
666 | } else { | |
667 | modem_ctl[0] &= ~0x7B; | |
668 | modem_ctl[0] |= 0x01; | |
669 | modem_ctl[1] |= 0x40; | |
670 | dbg("%s - flow control = NONE", __FUNCTION__); | |
671 | } | |
672 | ||
673 | dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", | |
674 | __FUNCTION__, modem_ctl[0], modem_ctl[1], | |
675 | modem_ctl[2], modem_ctl[3]); | |
676 | cp2101_set_config(port, CP2101_MODEMCTL, modem_ctl, 16); | |
677 | } | |
678 | ||
679 | } | |
680 | ||
681 | static int cp2101_tiocmset (struct usb_serial_port *port, struct file *file, | |
682 | unsigned int set, unsigned int clear) | |
683 | { | |
684 | int control = 0; | |
685 | ||
686 | dbg("%s - port %d", __FUNCTION__, port->number); | |
687 | ||
688 | if (set & TIOCM_RTS) { | |
689 | control |= CONTROL_RTS; | |
690 | control |= CONTROL_WRITE_RTS; | |
691 | } | |
692 | if (set & TIOCM_DTR) { | |
693 | control |= CONTROL_DTR; | |
694 | control |= CONTROL_WRITE_DTR; | |
695 | } | |
696 | if (clear & TIOCM_RTS) { | |
697 | control &= ~CONTROL_RTS; | |
698 | control |= CONTROL_WRITE_RTS; | |
699 | } | |
700 | if (clear & TIOCM_DTR) { | |
701 | control &= ~CONTROL_DTR; | |
702 | control |= CONTROL_WRITE_DTR; | |
703 | } | |
704 | ||
705 | dbg("%s - control = 0x%.4x", __FUNCTION__, control); | |
706 | ||
707 | return cp2101_set_config(port, CP2101_CONTROL, &control, 2); | |
708 | ||
709 | } | |
710 | ||
711 | static int cp2101_tiocmget (struct usb_serial_port *port, struct file *file) | |
712 | { | |
713 | int control, result; | |
714 | ||
715 | dbg("%s - port %d", __FUNCTION__, port->number); | |
716 | ||
717 | cp2101_get_config(port, CP2101_CONTROL, &control, 1); | |
718 | ||
719 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
720 | |((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
721 | |((control & CONTROL_CTS) ? TIOCM_CTS : 0) | |
722 | |((control & CONTROL_DSR) ? TIOCM_DSR : 0) | |
723 | |((control & CONTROL_RING)? TIOCM_RI : 0) | |
724 | |((control & CONTROL_DCD) ? TIOCM_CD : 0); | |
725 | ||
726 | dbg("%s - control = 0x%.2x", __FUNCTION__, control); | |
727 | ||
728 | return result; | |
1da177e4 LT |
729 | } |
730 | ||
731 | static void cp2101_break_ctl (struct usb_serial_port *port, int break_state) | |
732 | { | |
39a66b8d | 733 | int state; |
1da177e4 LT |
734 | |
735 | dbg("%s - port %d", __FUNCTION__, port->number); | |
736 | if (break_state == 0) | |
737 | state = BREAK_OFF; | |
738 | else | |
739 | state = BREAK_ON; | |
740 | dbg("%s - turning break %s", __FUNCTION__, | |
741 | state==BREAK_OFF ? "off" : "on"); | |
39a66b8d | 742 | cp2101_set_config(port, CP2101_BREAK, &state, 2); |
1da177e4 LT |
743 | } |
744 | ||
745 | static int cp2101_startup (struct usb_serial *serial) | |
746 | { | |
39a66b8d | 747 | /* CP2101 buffers behave strangely unless device is reset */ |
1da177e4 LT |
748 | usb_reset_device(serial->dev); |
749 | return 0; | |
750 | } | |
751 | ||
752 | static void cp2101_shutdown (struct usb_serial *serial) | |
753 | { | |
754 | int i; | |
755 | ||
756 | dbg("%s", __FUNCTION__); | |
757 | ||
39a66b8d | 758 | /* Stop reads and writes on all ports */ |
1da177e4 LT |
759 | for (i=0; i < serial->num_ports; ++i) { |
760 | cp2101_cleanup(serial->port[i]); | |
761 | } | |
762 | } | |
763 | ||
764 | static int __init cp2101_init (void) | |
765 | { | |
766 | int retval; | |
767 | ||
768 | retval = usb_serial_register(&cp2101_device); | |
769 | if (retval) | |
39a66b8d | 770 | return retval; /* Failed to register */ |
1da177e4 LT |
771 | |
772 | retval = usb_register(&cp2101_driver); | |
773 | if (retval) { | |
39a66b8d | 774 | /* Failed to register */ |
1da177e4 LT |
775 | usb_serial_deregister(&cp2101_device); |
776 | return retval; | |
777 | } | |
778 | ||
39a66b8d | 779 | /* Success */ |
1da177e4 LT |
780 | info(DRIVER_DESC " " DRIVER_VERSION); |
781 | return 0; | |
782 | } | |
783 | ||
784 | static void __exit cp2101_exit (void) | |
785 | { | |
786 | usb_deregister (&cp2101_driver); | |
787 | usb_serial_deregister (&cp2101_device); | |
788 | } | |
789 | ||
790 | module_init(cp2101_init); | |
791 | module_exit(cp2101_exit); | |
792 | ||
793 | MODULE_DESCRIPTION(DRIVER_DESC); | |
794 | MODULE_VERSION(DRIVER_VERSION); | |
795 | MODULE_LICENSE("GPL"); | |
796 | ||
797 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
798 | MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); |