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16#include <linux/kernel.h>
17#include <linux/errno.h>
18#include <linux/slab.h>
19#include <linux/tty.h>
20#include <linux/tty_flip.h>
21#include <linux/module.h>
22#include <linux/moduleparam.h>
23#include <linux/usb.h>
24#include <linux/uaccess.h>
25#include <linux/usb/serial.h>
26
27#define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
28
29
30
31
32static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *);
33static void cp210x_close(struct usb_serial_port *);
34static void cp210x_get_termios(struct tty_struct *, struct usb_serial_port *);
35static void cp210x_get_termios_port(struct usb_serial_port *port,
36 unsigned int *cflagp, unsigned int *baudp);
37static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *,
38 struct ktermios *);
39static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
40 struct ktermios*);
41static int cp210x_tiocmget(struct tty_struct *);
42static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
43static int cp210x_tiocmset_port(struct usb_serial_port *port,
44 unsigned int, unsigned int);
45static void cp210x_break_ctl(struct tty_struct *, int);
46static int cp210x_startup(struct usb_serial *);
47static void cp210x_release(struct usb_serial *);
48static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
49
50static const struct usb_device_id id_table[] = {
51 { USB_DEVICE(0x045B, 0x0053) },
52 { USB_DEVICE(0x0471, 0x066A) },
53 { USB_DEVICE(0x0489, 0xE000) },
54 { USB_DEVICE(0x0489, 0xE003) },
55 { USB_DEVICE(0x0745, 0x1000) },
56 { USB_DEVICE(0x0846, 0x1100) },
57 { USB_DEVICE(0x08e6, 0x5501) },
58 { USB_DEVICE(0x08FD, 0x000A) },
59 { USB_DEVICE(0x0BED, 0x1100) },
60 { USB_DEVICE(0x0BED, 0x1101) },
61 { USB_DEVICE(0x0FCF, 0x1003) },
62 { USB_DEVICE(0x0FCF, 0x1004) },
63 { USB_DEVICE(0x0FCF, 0x1006) },
64 { USB_DEVICE(0x0FDE, 0xCA05) },
65 { USB_DEVICE(0x10A6, 0xAA26) },
66 { USB_DEVICE(0x10AB, 0x10C5) },
67 { USB_DEVICE(0x10B5, 0xAC70) },
68 { USB_DEVICE(0x10C4, 0x0F91) },
69 { USB_DEVICE(0x10C4, 0x1101) },
70 { USB_DEVICE(0x10C4, 0x1601) },
71 { USB_DEVICE(0x10C4, 0x800A) },
72 { USB_DEVICE(0x10C4, 0x803B) },
73 { USB_DEVICE(0x10C4, 0x8044) },
74 { USB_DEVICE(0x10C4, 0x804E) },
75 { USB_DEVICE(0x10C4, 0x8053) },
76 { USB_DEVICE(0x10C4, 0x8054) },
77 { USB_DEVICE(0x10C4, 0x8066) },
78 { USB_DEVICE(0x10C4, 0x806F) },
79 { USB_DEVICE(0x10C4, 0x807A) },
80 { USB_DEVICE(0x10C4, 0x80C4) },
81 { USB_DEVICE(0x10C4, 0x80CA) },
82 { USB_DEVICE(0x10C4, 0x80DD) },
83 { USB_DEVICE(0x10C4, 0x80F6) },
84 { USB_DEVICE(0x10C4, 0x8115) },
85 { USB_DEVICE(0x10C4, 0x813D) },
86 { USB_DEVICE(0x10C4, 0x813F) },
87 { USB_DEVICE(0x10C4, 0x814A) },
88 { USB_DEVICE(0x10C4, 0x814B) },
89 { USB_DEVICE(0x2405, 0x0003) },
90 { USB_DEVICE(0x10C4, 0x8156) },
91 { USB_DEVICE(0x10C4, 0x815E) },
92 { USB_DEVICE(0x10C4, 0x815F) },
93 { USB_DEVICE(0x10C4, 0x818B) },
94 { USB_DEVICE(0x10C4, 0x819F) },
95 { USB_DEVICE(0x10C4, 0x81A6) },
96 { USB_DEVICE(0x10C4, 0x81A9) },
97 { USB_DEVICE(0x10C4, 0x81AC) },
98 { USB_DEVICE(0x10C4, 0x81AD) },
99 { USB_DEVICE(0x10C4, 0x81C8) },
100 { USB_DEVICE(0x10C4, 0x81E2) },
101 { USB_DEVICE(0x10C4, 0x81E7) },
102 { USB_DEVICE(0x10C4, 0x81E8) },
103 { USB_DEVICE(0x10C4, 0x81F2) },
104 { USB_DEVICE(0x10C4, 0x8218) },
105 { USB_DEVICE(0x10C4, 0x822B) },
106 { USB_DEVICE(0x10C4, 0x826B) },
107 { USB_DEVICE(0x10C4, 0x8281) },
108 { USB_DEVICE(0x10C4, 0x8293) },
109 { USB_DEVICE(0x10C4, 0x82F9) },
110 { USB_DEVICE(0x10C4, 0x8341) },
111 { USB_DEVICE(0x10C4, 0x8382) },
112 { USB_DEVICE(0x10C4, 0x83A8) },
113 { USB_DEVICE(0x10C4, 0x83D8) },
114 { USB_DEVICE(0x10C4, 0x8411) },
115 { USB_DEVICE(0x10C4, 0x8418) },
116 { USB_DEVICE(0x10C4, 0x846E) },
117 { USB_DEVICE(0x10C4, 0x8477) },
118 { USB_DEVICE(0x10C4, 0x85EA) },
119 { USB_DEVICE(0x10C4, 0x85EB) },
120 { USB_DEVICE(0x10C4, 0x85F8) },
121 { USB_DEVICE(0x10C4, 0x8664) },
122 { USB_DEVICE(0x10C4, 0x8665) },
123 { USB_DEVICE(0x10C4, 0x88A4) },
124 { USB_DEVICE(0x10C4, 0x88A5) },
125 { USB_DEVICE(0x10C4, 0xEA60) },
126 { USB_DEVICE(0x10C4, 0xEA61) },
127 { USB_DEVICE(0x10C4, 0xEA70) },
128 { USB_DEVICE(0x10C4, 0xEA80) },
129 { USB_DEVICE(0x10C4, 0xEA71) },
130 { USB_DEVICE(0x10C4, 0xF001) },
131 { USB_DEVICE(0x10C4, 0xF002) },
132 { USB_DEVICE(0x10C4, 0xF003) },
133 { USB_DEVICE(0x10C4, 0xF004) },
134 { USB_DEVICE(0x10C5, 0xEA61) },
135 { USB_DEVICE(0x10CE, 0xEA6A) },
136 { USB_DEVICE(0x13AD, 0x9999) },
137 { USB_DEVICE(0x1555, 0x0004) },
138 { USB_DEVICE(0x166A, 0x0201) },
139 { USB_DEVICE(0x166A, 0x0301) },
140 { USB_DEVICE(0x166A, 0x0303) },
141 { USB_DEVICE(0x166A, 0x0304) },
142 { USB_DEVICE(0x166A, 0x0305) },
143 { USB_DEVICE(0x166A, 0x0401) },
144 { USB_DEVICE(0x166A, 0x0101) },
145 { USB_DEVICE(0x16D6, 0x0001) },
146 { USB_DEVICE(0x16DC, 0x0010) },
147 { USB_DEVICE(0x16DC, 0x0011) },
148 { USB_DEVICE(0x16DC, 0x0012) },
149 { USB_DEVICE(0x16DC, 0x0015) },
150 { USB_DEVICE(0x17A8, 0x0001) },
151 { USB_DEVICE(0x17A8, 0x0005) },
152 { USB_DEVICE(0x17F4, 0xAAAA) },
153 { USB_DEVICE(0x1843, 0x0200) },
154 { USB_DEVICE(0x18EF, 0xE00F) },
155 { USB_DEVICE(0x1ADB, 0x0001) },
156 { USB_DEVICE(0x1B1C, 0x1C00) },
157 { USB_DEVICE(0x1BE3, 0x07A6) },
158 { USB_DEVICE(0x1E29, 0x0102) },
159 { USB_DEVICE(0x1E29, 0x0501) },
160 { USB_DEVICE(0x1FB9, 0x0100) },
161 { USB_DEVICE(0x1FB9, 0x0200) },
162 { USB_DEVICE(0x1FB9, 0x0201) },
163 { USB_DEVICE(0x1FB9, 0x0202) },
164 { USB_DEVICE(0x1FB9, 0x0203) },
165 { USB_DEVICE(0x1FB9, 0x0300) },
166 { USB_DEVICE(0x1FB9, 0x0301) },
167 { USB_DEVICE(0x1FB9, 0x0302) },
168 { USB_DEVICE(0x1FB9, 0x0303) },
169 { USB_DEVICE(0x1FB9, 0x0400) },
170 { USB_DEVICE(0x1FB9, 0x0401) },
171 { USB_DEVICE(0x1FB9, 0x0402) },
172 { USB_DEVICE(0x1FB9, 0x0403) },
173 { USB_DEVICE(0x1FB9, 0x0404) },
174 { USB_DEVICE(0x1FB9, 0x0600) },
175 { USB_DEVICE(0x1FB9, 0x0601) },
176 { USB_DEVICE(0x1FB9, 0x0602) },
177 { USB_DEVICE(0x1FB9, 0x0700) },
178 { USB_DEVICE(0x1FB9, 0x0701) },
179 { USB_DEVICE(0x3195, 0xF190) },
180 { USB_DEVICE(0x3195, 0xF280) },
181 { USB_DEVICE(0x3195, 0xF281) },
182 { USB_DEVICE(0x413C, 0x9500) },
183 { }
184};
185
186MODULE_DEVICE_TABLE(usb, id_table);
187
188struct cp210x_serial_private {
189 __u8 bInterfaceNumber;
190};
191
192static struct usb_serial_driver cp210x_device = {
193 .driver = {
194 .owner = THIS_MODULE,
195 .name = "cp210x",
196 },
197 .id_table = id_table,
198 .num_ports = 1,
199 .bulk_in_size = 256,
200 .bulk_out_size = 256,
201 .open = cp210x_open,
202 .close = cp210x_close,
203 .break_ctl = cp210x_break_ctl,
204 .set_termios = cp210x_set_termios,
205 .tiocmget = cp210x_tiocmget,
206 .tiocmset = cp210x_tiocmset,
207 .attach = cp210x_startup,
208 .release = cp210x_release,
209 .dtr_rts = cp210x_dtr_rts
210};
211
212static struct usb_serial_driver * const serial_drivers[] = {
213 &cp210x_device, NULL
214};
215
216
217#define REQTYPE_HOST_TO_INTERFACE 0x41
218#define REQTYPE_INTERFACE_TO_HOST 0xc1
219#define REQTYPE_HOST_TO_DEVICE 0x40
220#define REQTYPE_DEVICE_TO_HOST 0xc0
221
222
223#define CP210X_IFC_ENABLE 0x00
224#define CP210X_SET_BAUDDIV 0x01
225#define CP210X_GET_BAUDDIV 0x02
226#define CP210X_SET_LINE_CTL 0x03
227#define CP210X_GET_LINE_CTL 0x04
228#define CP210X_SET_BREAK 0x05
229#define CP210X_IMM_CHAR 0x06
230#define CP210X_SET_MHS 0x07
231#define CP210X_GET_MDMSTS 0x08
232#define CP210X_SET_XON 0x09
233#define CP210X_SET_XOFF 0x0A
234#define CP210X_SET_EVENTMASK 0x0B
235#define CP210X_GET_EVENTMASK 0x0C
236#define CP210X_SET_CHAR 0x0D
237#define CP210X_GET_CHARS 0x0E
238#define CP210X_GET_PROPS 0x0F
239#define CP210X_GET_COMM_STATUS 0x10
240#define CP210X_RESET 0x11
241#define CP210X_PURGE 0x12
242#define CP210X_SET_FLOW 0x13
243#define CP210X_GET_FLOW 0x14
244#define CP210X_EMBED_EVENTS 0x15
245#define CP210X_GET_EVENTSTATE 0x16
246#define CP210X_SET_CHARS 0x19
247#define CP210X_GET_BAUDRATE 0x1D
248#define CP210X_SET_BAUDRATE 0x1E
249
250
251#define UART_ENABLE 0x0001
252#define UART_DISABLE 0x0000
253
254
255#define BAUD_RATE_GEN_FREQ 0x384000
256
257
258#define BITS_DATA_MASK 0X0f00
259#define BITS_DATA_5 0X0500
260#define BITS_DATA_6 0X0600
261#define BITS_DATA_7 0X0700
262#define BITS_DATA_8 0X0800
263#define BITS_DATA_9 0X0900
264
265#define BITS_PARITY_MASK 0x00f0
266#define BITS_PARITY_NONE 0x0000
267#define BITS_PARITY_ODD 0x0010
268#define BITS_PARITY_EVEN 0x0020
269#define BITS_PARITY_MARK 0x0030
270#define BITS_PARITY_SPACE 0x0040
271
272#define BITS_STOP_MASK 0x000f
273#define BITS_STOP_1 0x0000
274#define BITS_STOP_1_5 0x0001
275#define BITS_STOP_2 0x0002
276
277
278#define BREAK_ON 0x0001
279#define BREAK_OFF 0x0000
280
281
282#define CONTROL_DTR 0x0001
283#define CONTROL_RTS 0x0002
284#define CONTROL_CTS 0x0010
285#define CONTROL_DSR 0x0020
286#define CONTROL_RING 0x0040
287#define CONTROL_DCD 0x0080
288#define CONTROL_WRITE_DTR 0x0100
289#define CONTROL_WRITE_RTS 0x0200
290
291
292
293
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295
296
297
298static int cp210x_get_config(struct usb_serial_port *port, u8 request,
299 unsigned int *data, int size)
300{
301 struct usb_serial *serial = port->serial;
302 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
303 __le32 *buf;
304 int result, i, length;
305
306
307 length = (((size - 1) | 3) + 1) / 4;
308
309 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
310 if (!buf)
311 return -ENOMEM;
312
313
314 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
315 request, REQTYPE_INTERFACE_TO_HOST, 0x0000,
316 spriv->bInterfaceNumber, buf, size,
317 USB_CTRL_GET_TIMEOUT);
318
319
320 for (i = 0; i < length; i++)
321 data[i] = le32_to_cpu(buf[i]);
322
323 kfree(buf);
324
325 if (result != size) {
326 dev_dbg(&port->dev, "%s - Unable to send config request, request=0x%x size=%d result=%d\n",
327 __func__, request, size, result);
328 if (result > 0)
329 result = -EPROTO;
330
331 return result;
332 }
333
334 return 0;
335}
336
337
338
339
340
341
342
343static int cp210x_set_config(struct usb_serial_port *port, u8 request,
344 unsigned int *data, int size)
345{
346 struct usb_serial *serial = port->serial;
347 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
348 __le32 *buf;
349 int result, i, length;
350
351
352 length = (((size - 1) | 3) + 1) / 4;
353
354 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
355 if (!buf)
356 return -ENOMEM;
357
358
359 for (i = 0; i < length; i++)
360 buf[i] = cpu_to_le32(data[i]);
361
362 if (size > 2) {
363 result = usb_control_msg(serial->dev,
364 usb_sndctrlpipe(serial->dev, 0),
365 request, REQTYPE_HOST_TO_INTERFACE, 0x0000,
366 spriv->bInterfaceNumber, buf, size,
367 USB_CTRL_SET_TIMEOUT);
368 } else {
369 result = usb_control_msg(serial->dev,
370 usb_sndctrlpipe(serial->dev, 0),
371 request, REQTYPE_HOST_TO_INTERFACE, data[0],
372 spriv->bInterfaceNumber, NULL, 0,
373 USB_CTRL_SET_TIMEOUT);
374 }
375
376 kfree(buf);
377
378 if ((size > 2 && result != size) || result < 0) {
379 dev_dbg(&port->dev, "%s - Unable to send request, request=0x%x size=%d result=%d\n",
380 __func__, request, size, result);
381 if (result > 0)
382 result = -EPROTO;
383
384 return result;
385 }
386
387 return 0;
388}
389
390
391
392
393
394
395static inline int cp210x_set_config_single(struct usb_serial_port *port,
396 u8 request, unsigned int data)
397{
398 return cp210x_set_config(port, request, &data, 2);
399}
400
401
402
403
404
405static unsigned int cp210x_quantise_baudrate(unsigned int baud)
406{
407 if (baud <= 300)
408 baud = 300;
409 else if (baud <= 600) baud = 600;
410 else if (baud <= 1200) baud = 1200;
411 else if (baud <= 1800) baud = 1800;
412 else if (baud <= 2400) baud = 2400;
413 else if (baud <= 4000) baud = 4000;
414 else if (baud <= 4803) baud = 4800;
415 else if (baud <= 7207) baud = 7200;
416 else if (baud <= 9612) baud = 9600;
417 else if (baud <= 14428) baud = 14400;
418 else if (baud <= 16062) baud = 16000;
419 else if (baud <= 19250) baud = 19200;
420 else if (baud <= 28912) baud = 28800;
421 else if (baud <= 38601) baud = 38400;
422 else if (baud <= 51558) baud = 51200;
423 else if (baud <= 56280) baud = 56000;
424 else if (baud <= 58053) baud = 57600;
425 else if (baud <= 64111) baud = 64000;
426 else if (baud <= 77608) baud = 76800;
427 else if (baud <= 117028) baud = 115200;
428 else if (baud <= 129347) baud = 128000;
429 else if (baud <= 156868) baud = 153600;
430 else if (baud <= 237832) baud = 230400;
431 else if (baud <= 254234) baud = 250000;
432 else if (baud <= 273066) baud = 256000;
433 else if (baud <= 491520) baud = 460800;
434 else if (baud <= 567138) baud = 500000;
435 else if (baud <= 670254) baud = 576000;
436 else if (baud < 1000000)
437 baud = 921600;
438 else if (baud > 2000000)
439 baud = 2000000;
440 return baud;
441}
442
443static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
444{
445 int result;
446
447 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE,
448 UART_ENABLE);
449 if (result) {
450 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
451 return result;
452 }
453
454
455 cp210x_get_termios(tty, port);
456
457
458 if (tty)
459 cp210x_change_speed(tty, port, NULL);
460
461 return usb_serial_generic_open(tty, port);
462}
463
464static void cp210x_close(struct usb_serial_port *port)
465{
466 usb_serial_generic_close(port);
467 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
468}
469
470
471
472
473
474
475
476static void cp210x_get_termios(struct tty_struct *tty,
477 struct usb_serial_port *port)
478{
479 unsigned int baud;
480
481 if (tty) {
482 cp210x_get_termios_port(tty->driver_data,
483 &tty->termios.c_cflag, &baud);
484 tty_encode_baud_rate(tty, baud, baud);
485 } else {
486 unsigned int cflag;
487 cflag = 0;
488 cp210x_get_termios_port(port, &cflag, &baud);
489 }
490}
491
492
493
494
495
496static void cp210x_get_termios_port(struct usb_serial_port *port,
497 unsigned int *cflagp, unsigned int *baudp)
498{
499 struct device *dev = &port->dev;
500 unsigned int cflag, modem_ctl[4];
501 unsigned int baud;
502 unsigned int bits;
503
504 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4);
505
506 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
507 *baudp = baud;
508
509 cflag = *cflagp;
510
511 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
512 cflag &= ~CSIZE;
513 switch (bits & BITS_DATA_MASK) {
514 case BITS_DATA_5:
515 dev_dbg(dev, "%s - data bits = 5\n", __func__);
516 cflag |= CS5;
517 break;
518 case BITS_DATA_6:
519 dev_dbg(dev, "%s - data bits = 6\n", __func__);
520 cflag |= CS6;
521 break;
522 case BITS_DATA_7:
523 dev_dbg(dev, "%s - data bits = 7\n", __func__);
524 cflag |= CS7;
525 break;
526 case BITS_DATA_8:
527 dev_dbg(dev, "%s - data bits = 8\n", __func__);
528 cflag |= CS8;
529 break;
530 case BITS_DATA_9:
531 dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__);
532 cflag |= CS8;
533 bits &= ~BITS_DATA_MASK;
534 bits |= BITS_DATA_8;
535 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
536 break;
537 default:
538 dev_dbg(dev, "%s - Unknown number of data bits, using 8\n", __func__);
539 cflag |= CS8;
540 bits &= ~BITS_DATA_MASK;
541 bits |= BITS_DATA_8;
542 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
543 break;
544 }
545
546 switch (bits & BITS_PARITY_MASK) {
547 case BITS_PARITY_NONE:
548 dev_dbg(dev, "%s - parity = NONE\n", __func__);
549 cflag &= ~PARENB;
550 break;
551 case BITS_PARITY_ODD:
552 dev_dbg(dev, "%s - parity = ODD\n", __func__);
553 cflag |= (PARENB|PARODD);
554 break;
555 case BITS_PARITY_EVEN:
556 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
557 cflag &= ~PARODD;
558 cflag |= PARENB;
559 break;
560 case BITS_PARITY_MARK:
561 dev_dbg(dev, "%s - parity = MARK\n", __func__);
562 cflag |= (PARENB|PARODD|CMSPAR);
563 break;
564 case BITS_PARITY_SPACE:
565 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
566 cflag &= ~PARODD;
567 cflag |= (PARENB|CMSPAR);
568 break;
569 default:
570 dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __func__);
571 cflag &= ~PARENB;
572 bits &= ~BITS_PARITY_MASK;
573 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
574 break;
575 }
576
577 cflag &= ~CSTOPB;
578 switch (bits & BITS_STOP_MASK) {
579 case BITS_STOP_1:
580 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
581 break;
582 case BITS_STOP_1_5:
583 dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__);
584 bits &= ~BITS_STOP_MASK;
585 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
586 break;
587 case BITS_STOP_2:
588 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
589 cflag |= CSTOPB;
590 break;
591 default:
592 dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__);
593 bits &= ~BITS_STOP_MASK;
594 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
595 break;
596 }
597
598 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
599 if (modem_ctl[0] & 0x0008) {
600 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
601 cflag |= CRTSCTS;
602 } else {
603 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
604 cflag &= ~CRTSCTS;
605 }
606
607 *cflagp = cflag;
608}
609
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635
636static void cp210x_change_speed(struct tty_struct *tty,
637 struct usb_serial_port *port, struct ktermios *old_termios)
638{
639 u32 baud;
640
641 baud = tty->termios.c_ospeed;
642
643
644
645
646
647
648 baud = cp210x_quantise_baudrate(baud);
649
650 dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud);
651 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud,
652 sizeof(baud))) {
653 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud);
654 if (old_termios)
655 baud = old_termios->c_ospeed;
656 else
657 baud = 9600;
658 }
659
660 tty_encode_baud_rate(tty, baud, baud);
661}
662
663static void cp210x_set_termios(struct tty_struct *tty,
664 struct usb_serial_port *port, struct ktermios *old_termios)
665{
666 struct device *dev = &port->dev;
667 unsigned int cflag, old_cflag;
668 unsigned int bits;
669 unsigned int modem_ctl[4];
670
671 cflag = tty->termios.c_cflag;
672 old_cflag = old_termios->c_cflag;
673
674 if (tty->termios.c_ospeed != old_termios->c_ospeed)
675 cp210x_change_speed(tty, port, old_termios);
676
677
678 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
679 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
680 bits &= ~BITS_DATA_MASK;
681 switch (cflag & CSIZE) {
682 case CS5:
683 bits |= BITS_DATA_5;
684 dev_dbg(dev, "%s - data bits = 5\n", __func__);
685 break;
686 case CS6:
687 bits |= BITS_DATA_6;
688 dev_dbg(dev, "%s - data bits = 6\n", __func__);
689 break;
690 case CS7:
691 bits |= BITS_DATA_7;
692 dev_dbg(dev, "%s - data bits = 7\n", __func__);
693 break;
694 case CS8:
695 bits |= BITS_DATA_8;
696 dev_dbg(dev, "%s - data bits = 8\n", __func__);
697 break;
698
699
700
701
702 default:
703 dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n");
704 bits |= BITS_DATA_8;
705 break;
706 }
707 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
708 dev_dbg(dev, "Number of data bits requested not supported by device\n");
709 }
710
711 if ((cflag & (PARENB|PARODD|CMSPAR)) !=
712 (old_cflag & (PARENB|PARODD|CMSPAR))) {
713 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
714 bits &= ~BITS_PARITY_MASK;
715 if (cflag & PARENB) {
716 if (cflag & CMSPAR) {
717 if (cflag & PARODD) {
718 bits |= BITS_PARITY_MARK;
719 dev_dbg(dev, "%s - parity = MARK\n", __func__);
720 } else {
721 bits |= BITS_PARITY_SPACE;
722 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
723 }
724 } else {
725 if (cflag & PARODD) {
726 bits |= BITS_PARITY_ODD;
727 dev_dbg(dev, "%s - parity = ODD\n", __func__);
728 } else {
729 bits |= BITS_PARITY_EVEN;
730 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
731 }
732 }
733 }
734 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
735 dev_dbg(dev, "Parity mode not supported by device\n");
736 }
737
738 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
739 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
740 bits &= ~BITS_STOP_MASK;
741 if (cflag & CSTOPB) {
742 bits |= BITS_STOP_2;
743 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
744 } else {
745 bits |= BITS_STOP_1;
746 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
747 }
748 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
749 dev_dbg(dev, "Number of stop bits requested not supported by device\n");
750 }
751
752 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
753 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
754 dev_dbg(dev, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
755 __func__, modem_ctl[0], modem_ctl[1],
756 modem_ctl[2], modem_ctl[3]);
757
758 if (cflag & CRTSCTS) {
759 modem_ctl[0] &= ~0x7B;
760 modem_ctl[0] |= 0x09;
761 modem_ctl[1] = 0x80;
762 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
763 } else {
764 modem_ctl[0] &= ~0x7B;
765 modem_ctl[0] |= 0x01;
766 modem_ctl[1] |= 0x40;
767 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
768 }
769
770 dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
771 __func__, modem_ctl[0], modem_ctl[1],
772 modem_ctl[2], modem_ctl[3]);
773 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
774 }
775
776}
777
778static int cp210x_tiocmset(struct tty_struct *tty,
779 unsigned int set, unsigned int clear)
780{
781 struct usb_serial_port *port = tty->driver_data;
782 return cp210x_tiocmset_port(port, set, clear);
783}
784
785static int cp210x_tiocmset_port(struct usb_serial_port *port,
786 unsigned int set, unsigned int clear)
787{
788 unsigned int control = 0;
789
790 if (set & TIOCM_RTS) {
791 control |= CONTROL_RTS;
792 control |= CONTROL_WRITE_RTS;
793 }
794 if (set & TIOCM_DTR) {
795 control |= CONTROL_DTR;
796 control |= CONTROL_WRITE_DTR;
797 }
798 if (clear & TIOCM_RTS) {
799 control &= ~CONTROL_RTS;
800 control |= CONTROL_WRITE_RTS;
801 }
802 if (clear & TIOCM_DTR) {
803 control &= ~CONTROL_DTR;
804 control |= CONTROL_WRITE_DTR;
805 }
806
807 dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control);
808
809 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
810}
811
812static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
813{
814 if (on)
815 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
816 else
817 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
818}
819
820static int cp210x_tiocmget(struct tty_struct *tty)
821{
822 struct usb_serial_port *port = tty->driver_data;
823 unsigned int control;
824 int result;
825
826 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
827
828 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
829 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
830 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
831 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
832 |((control & CONTROL_RING)? TIOCM_RI : 0)
833 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
834
835 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control);
836
837 return result;
838}
839
840static void cp210x_break_ctl(struct tty_struct *tty, int break_state)
841{
842 struct usb_serial_port *port = tty->driver_data;
843 unsigned int state;
844
845 if (break_state == 0)
846 state = BREAK_OFF;
847 else
848 state = BREAK_ON;
849 dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
850 state == BREAK_OFF ? "off" : "on");
851 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
852}
853
854static int cp210x_startup(struct usb_serial *serial)
855{
856 struct usb_host_interface *cur_altsetting;
857 struct cp210x_serial_private *spriv;
858
859
860 usb_reset_device(serial->dev);
861
862 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
863 if (!spriv)
864 return -ENOMEM;
865
866 cur_altsetting = serial->interface->cur_altsetting;
867 spriv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber;
868
869 usb_set_serial_data(serial, spriv);
870
871 return 0;
872}
873
874static void cp210x_release(struct usb_serial *serial)
875{
876 struct cp210x_serial_private *spriv;
877
878 spriv = usb_get_serial_data(serial);
879 kfree(spriv);
880}
881
882module_usb_serial_driver(serial_drivers, id_table);
883
884MODULE_DESCRIPTION(DRIVER_DESC);
885MODULE_LICENSE("GPL");
886