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USB: pl2303: distinguish between original and cloned HX chips
[deliverable/linux.git] / drivers / usb / serial / pl2303.c
1 /*
2 * Prolific PL2303 USB to serial adaptor driver
3 *
4 * Copyright (C) 2001-2007 Greg Kroah-Hartman (greg@kroah.com)
5 * Copyright (C) 2003 IBM Corp.
6 *
7 * Copyright (C) 2009, 2013 Frank Schäfer <fschaefer.oss@googlemail.com>
8 * - fixes, improvements and documentation for the baud rate encoding methods
9 * Copyright (C) 2013 Reinhard Max <max@suse.de>
10 * - fixes and improvements for the divisor based baud rate encoding method
11 *
12 * Original driver for 2.2.x by anonymous
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License version
16 * 2 as published by the Free Software Foundation.
17 *
18 * See Documentation/usb/usb-serial.txt for more information on using this
19 * driver
20 *
21 */
22
23 #include <linux/kernel.h>
24 #include <linux/errno.h>
25 #include <linux/init.h>
26 #include <linux/slab.h>
27 #include <linux/tty.h>
28 #include <linux/tty_driver.h>
29 #include <linux/tty_flip.h>
30 #include <linux/serial.h>
31 #include <linux/module.h>
32 #include <linux/moduleparam.h>
33 #include <linux/spinlock.h>
34 #include <linux/uaccess.h>
35 #include <linux/usb.h>
36 #include <linux/usb/serial.h>
37 #include <asm/unaligned.h>
38 #include "pl2303.h"
39
40 /*
41 * Version Information
42 */
43 #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
44
45 static const struct usb_device_id id_table[] = {
46 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
47 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
48 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
49 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
50 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
51 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
52 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
53 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
54 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
55 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },
56 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
57 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
58 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
59 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
60 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
61 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
62 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
63 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
64 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
65 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
66 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
67 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
68 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
69 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
70 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
71 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
72 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
73 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
74 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
75 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
76 { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
77 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
78 { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
79 { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
80 { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
81 { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
82 { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
83 { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
84 { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
85 { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
86 { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
87 { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
88 { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
89 { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
90 { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
91 { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
92 { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
93 { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
94 { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
95 { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
96 { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
97 { } /* Terminating entry */
98 };
99
100 MODULE_DEVICE_TABLE(usb, id_table);
101
102 #define SET_LINE_REQUEST_TYPE 0x21
103 #define SET_LINE_REQUEST 0x20
104
105 #define SET_CONTROL_REQUEST_TYPE 0x21
106 #define SET_CONTROL_REQUEST 0x22
107 #define CONTROL_DTR 0x01
108 #define CONTROL_RTS 0x02
109
110 #define BREAK_REQUEST_TYPE 0x21
111 #define BREAK_REQUEST 0x23
112 #define BREAK_ON 0xffff
113 #define BREAK_OFF 0x0000
114
115 #define GET_LINE_REQUEST_TYPE 0xa1
116 #define GET_LINE_REQUEST 0x21
117
118 #define VENDOR_WRITE_REQUEST_TYPE 0x40
119 #define VENDOR_WRITE_REQUEST 0x01
120
121 #define VENDOR_READ_REQUEST_TYPE 0xc0
122 #define VENDOR_READ_REQUEST 0x01
123
124 #define UART_STATE 0x08
125 #define UART_STATE_TRANSIENT_MASK 0x74
126 #define UART_DCD 0x01
127 #define UART_DSR 0x02
128 #define UART_BREAK_ERROR 0x04
129 #define UART_RING 0x08
130 #define UART_FRAME_ERROR 0x10
131 #define UART_PARITY_ERROR 0x20
132 #define UART_OVERRUN_ERROR 0x40
133 #define UART_CTS 0x80
134
135
136 enum pl2303_type {
137 type_0, /* H version ? */
138 type_1, /* H version ? */
139 HX_TA, /* HX(A) / X(A) / TA version */ /* TODO: improve */
140 HXD_EA_RA_SA, /* HXD / EA / RA / SA version */ /* TODO: improve */
141 TB, /* TB version */
142 HX_CLONE, /* Cheap and less functional clone of the HX chip */
143 };
144 /*
145 * NOTE: don't know the difference between type 0 and type 1,
146 * until someone from Prolific tells us...
147 * TODO: distinguish between X/HX, TA and HXD, EA, RA, SA variants
148 */
149
150 struct pl2303_serial_private {
151 enum pl2303_type type;
152 };
153
154 struct pl2303_private {
155 spinlock_t lock;
156 u8 line_control;
157 u8 line_status;
158 };
159
160 static int pl2303_vendor_read(__u16 value, __u16 index,
161 struct usb_serial *serial, unsigned char *buf)
162 {
163 int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
164 VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
165 value, index, buf, 1, 100);
166 dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d - %x\n",
167 VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index,
168 res, buf[0]);
169 return res;
170 }
171
172 static int pl2303_vendor_write(__u16 value, __u16 index,
173 struct usb_serial *serial)
174 {
175 int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
176 VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
177 value, index, NULL, 0, 100);
178 dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d\n",
179 VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index,
180 res);
181 return res;
182 }
183
184 static int pl2303_startup(struct usb_serial *serial)
185 {
186 struct pl2303_serial_private *spriv;
187 enum pl2303_type type = type_0;
188 char *type_str = "unknown (treating as type_0)";
189 unsigned char *buf;
190
191 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
192 if (!spriv)
193 return -ENOMEM;
194
195 buf = kmalloc(10, GFP_KERNEL);
196 if (!buf) {
197 kfree(spriv);
198 return -ENOMEM;
199 }
200
201 if (serial->dev->descriptor.bDeviceClass == 0x02) {
202 type = type_0;
203 type_str = "type_0";
204 } else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40) {
205 /*
206 * NOTE: The bcdDevice version is the only difference between
207 * the device descriptors of the X/HX, HXD, EA, RA, SA, TA, TB
208 */
209 if (le16_to_cpu(serial->dev->descriptor.bcdDevice) == 0x300) {
210 /* Check if the device is a clone */
211 pl2303_vendor_read(0x9494, 0, serial, buf);
212 /*
213 * NOTE: Not sure if this read is really needed.
214 * The HX returns 0x00, the clone 0x02, but the Windows
215 * driver seems to ignore the value and continues.
216 */
217 pl2303_vendor_write(0x0606, 0xaa, serial);
218 pl2303_vendor_read(0x8686, 0, serial, buf);
219 if (buf[0] != 0xaa) {
220 type = HX_CLONE;
221 type_str = "X/HX clone (limited functionality)";
222 } else {
223 type = HX_TA;
224 type_str = "X/HX/TA";
225 }
226 pl2303_vendor_write(0x0606, 0x00, serial);
227 } else if (le16_to_cpu(serial->dev->descriptor.bcdDevice)
228 == 0x400) {
229 type = HXD_EA_RA_SA;
230 type_str = "HXD/EA/RA/SA";
231 } else if (le16_to_cpu(serial->dev->descriptor.bcdDevice)
232 == 0x500) {
233 type = TB;
234 type_str = "TB";
235 } else {
236 dev_info(&serial->interface->dev,
237 "unknown/unsupported device type\n");
238 kfree(spriv);
239 kfree(buf);
240 return -ENODEV;
241 }
242 } else if (serial->dev->descriptor.bDeviceClass == 0x00
243 || serial->dev->descriptor.bDeviceClass == 0xFF) {
244 type = type_1;
245 type_str = "type_1";
246 }
247 dev_dbg(&serial->interface->dev, "device type: %s\n", type_str);
248
249 spriv->type = type;
250 usb_set_serial_data(serial, spriv);
251
252 pl2303_vendor_read(0x8484, 0, serial, buf);
253 pl2303_vendor_write(0x0404, 0, serial);
254 pl2303_vendor_read(0x8484, 0, serial, buf);
255 pl2303_vendor_read(0x8383, 0, serial, buf);
256 pl2303_vendor_read(0x8484, 0, serial, buf);
257 pl2303_vendor_write(0x0404, 1, serial);
258 pl2303_vendor_read(0x8484, 0, serial, buf);
259 pl2303_vendor_read(0x8383, 0, serial, buf);
260 pl2303_vendor_write(0, 1, serial);
261 pl2303_vendor_write(1, 0, serial);
262 if (type == type_0 || type == type_1)
263 pl2303_vendor_write(2, 0x24, serial);
264 else
265 pl2303_vendor_write(2, 0x44, serial);
266
267 kfree(buf);
268 return 0;
269 }
270
271 static void pl2303_release(struct usb_serial *serial)
272 {
273 struct pl2303_serial_private *spriv;
274
275 spriv = usb_get_serial_data(serial);
276 kfree(spriv);
277 }
278
279 static int pl2303_port_probe(struct usb_serial_port *port)
280 {
281 struct pl2303_private *priv;
282
283 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
284 if (!priv)
285 return -ENOMEM;
286
287 spin_lock_init(&priv->lock);
288
289 usb_set_serial_port_data(port, priv);
290
291 port->port.drain_delay = 256;
292
293 return 0;
294 }
295
296 static int pl2303_port_remove(struct usb_serial_port *port)
297 {
298 struct pl2303_private *priv;
299
300 priv = usb_get_serial_port_data(port);
301 kfree(priv);
302
303 return 0;
304 }
305
306 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
307 {
308 struct usb_device *dev = port->serial->dev;
309 int retval;
310
311 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
312 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
313 value, 0, NULL, 0, 100);
314 dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__,
315 value, retval);
316 return retval;
317 }
318
319 static int pl2303_baudrate_encode_direct(int baud, enum pl2303_type type,
320 u8 buf[4])
321 {
322 /*
323 * NOTE: Only the values defined in baud_sup are supported !
324 * => if unsupported values are set, the PL2303 uses 9600 baud instead
325 * => HX clones just don't work at unsupported baud rates < 115200 baud,
326 * for baud rates > 115200 they run at 115200 baud
327 */
328 const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
329 4800, 7200, 9600, 14400, 19200, 28800, 38400,
330 57600, 115200, 230400, 460800, 614400, 921600,
331 1228800, 2457600, 3000000, 6000000, 12000000 };
332 /*
333 * NOTE: With the exception of type_0/1 devices, the following
334 * additional baud rates are supported (tested with HX rev. 3A only):
335 * 110*, 56000*, 128000, 134400, 161280, 201600, 256000*, 268800,
336 * 403200, 806400. (*: not HX and HX clones)
337 *
338 * Maximum values: HXD, TB: 12000000; HX, TA: 6000000;
339 * type_0+1: 1228800; RA: 921600; HX clones, SA: 115200
340 *
341 * As long as we are not using this encoding method for anything else
342 * than the type_0+1, HX and HX clone chips, there is no point in
343 * complicating the code to support them.
344 */
345 int i;
346
347 /* Set baudrate to nearest supported value */
348 for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) {
349 if (baud_sup[i] > baud)
350 break;
351 }
352 if (i == ARRAY_SIZE(baud_sup))
353 baud = baud_sup[i - 1];
354 else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1]))
355 baud = baud_sup[i - 1];
356 else
357 baud = baud_sup[i];
358 /* Respect the chip type specific baud rate limits */
359 /*
360 * FIXME: as long as we don't know how to distinguish between the
361 * HXD, EA, RA, and SA chip variants, allow the max. value of 12M.
362 */
363 if (type == HX_TA)
364 baud = min_t(int, baud, 6000000);
365 else if (type == type_0 || type == type_1)
366 baud = min_t(int, baud, 1228800);
367 else if (type == HX_CLONE)
368 baud = min_t(int, baud, 115200);
369 /* Direct (standard) baud rate encoding method */
370 put_unaligned_le32(baud, buf);
371
372 return baud;
373 }
374
375 static int pl2303_baudrate_encode_divisor(int baud, enum pl2303_type type,
376 u8 buf[4])
377 {
378 /*
379 * Divisor based baud rate encoding method
380 *
381 * NOTE: HX clones do NOT support this method.
382 * It's not clear if the type_0/1 chips support it.
383 *
384 * divisor = 12MHz * 32 / baudrate = 2^A * B
385 *
386 * with
387 *
388 * A = buf[1] & 0x0e
389 * B = buf[0] + (buf[1] & 0x01) << 8
390 *
391 * Special cases:
392 * => 8 < B < 16: device seems to work not properly
393 * => B <= 8: device uses the max. value B = 512 instead
394 */
395 unsigned int A, B;
396
397 /*
398 * NOTE: The Windows driver allows maximum baud rates of 110% of the
399 * specified maximium value.
400 * Quick tests with early (2004) HX (rev. A) chips suggest, that even
401 * higher baud rates (up to the maximum of 24M baud !) are working fine,
402 * but that should really be tested carefully in "real life" scenarios
403 * before removing the upper limit completely.
404 * Baud rates smaller than the specified 75 baud are definitely working
405 * fine.
406 */
407 if (type == type_0 || type == type_1)
408 baud = min_t(int, baud, 1228800 * 1.1);
409 else if (type == HX_TA)
410 baud = min_t(int, baud, 6000000 * 1.1);
411 else if (type == HXD_EA_RA_SA)
412 /* HXD, EA: 12Mbps; RA: 1Mbps; SA: 115200 bps */
413 /*
414 * FIXME: as long as we don't know how to distinguish between
415 * these chip variants, allow the max. of these values
416 */
417 baud = min_t(int, baud, 12000000 * 1.1);
418 else if (type == TB)
419 baud = min_t(int, baud, 12000000 * 1.1);
420 /* Determine factors A and B */
421 A = 0;
422 B = 12000000 * 32 / baud; /* 12MHz */
423 B <<= 1; /* Add one bit for rounding */
424 while (B > (512 << 1) && A <= 14) {
425 A += 2;
426 B >>= 2;
427 }
428 if (A > 14) { /* max. divisor = min. baudrate reached */
429 A = 14;
430 B = 512;
431 /* => ~45.78 baud */
432 } else {
433 B = (B + 1) >> 1; /* Round the last bit */
434 }
435 /* Handle special cases */
436 if (B == 512)
437 B = 0; /* also: 1 to 8 */
438 else if (B < 16)
439 /*
440 * NOTE: With the current algorithm this happens
441 * only for A=0 and means that the min. divisor
442 * (respectively: the max. baudrate) is reached.
443 */
444 B = 16; /* => 24 MBaud */
445 /* Encode the baud rate */
446 buf[3] = 0x80; /* Select divisor encoding method */
447 buf[2] = 0;
448 buf[1] = (A & 0x0e); /* A */
449 buf[1] |= ((B & 0x100) >> 8); /* MSB of B */
450 buf[0] = B & 0xff; /* 8 LSBs of B */
451 /* Calculate the actual/resulting baud rate */
452 if (B <= 8)
453 B = 512;
454 baud = 12000000 * 32 / ((1 << A) * B);
455
456 return baud;
457 }
458
459 static void pl2303_encode_baudrate(struct tty_struct *tty,
460 struct usb_serial_port *port,
461 enum pl2303_type type,
462 u8 buf[4])
463 {
464 int baud;
465
466 baud = tty_get_baud_rate(tty);
467 dev_dbg(&port->dev, "baud requested = %d\n", baud);
468 if (!baud)
469 return;
470 /*
471 * There are two methods for setting/encoding the baud rate
472 * 1) Direct method: encodes the baud rate value directly
473 * => supported by all chip types
474 * 2) Divisor based method: encodes a divisor to a base value (12MHz*32)
475 * => not supported by HX clones (and likely type_0/1 chips)
476 *
477 * NOTE: Although the divisor based baud rate encoding method is much
478 * more flexible, some of the standard baud rate values can not be
479 * realized exactly. But the difference is very small (max. 0.2%) and
480 * the device likely uses the same baud rate generator for both methods
481 * so that there is likley no difference.
482 */
483 if (type == type_0 || type == type_1 || type == HX_CLONE)
484 baud = pl2303_baudrate_encode_direct(baud, type, buf);
485 else
486 baud = pl2303_baudrate_encode_divisor(baud, type, buf);
487 /* Save resulting baud rate */
488 tty_encode_baud_rate(tty, baud, baud);
489 dev_dbg(&port->dev, "baud set = %d\n", baud);
490 }
491
492 static void pl2303_set_termios(struct tty_struct *tty,
493 struct usb_serial_port *port, struct ktermios *old_termios)
494 {
495 struct usb_serial *serial = port->serial;
496 struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
497 struct pl2303_private *priv = usb_get_serial_port_data(port);
498 unsigned long flags;
499 unsigned char *buf;
500 int i;
501 u8 control;
502
503 /*
504 * The PL2303 is reported to lose bytes if you change serial settings
505 * even to the same values as before. Thus we actually need to filter
506 * in this specific case.
507 */
508 if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
509 return;
510
511 buf = kzalloc(7, GFP_KERNEL);
512 if (!buf) {
513 dev_err(&port->dev, "%s - out of memory.\n", __func__);
514 /* Report back no change occurred */
515 if (old_termios)
516 tty->termios = *old_termios;
517 return;
518 }
519
520 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
521 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
522 0, 0, buf, 7, 100);
523 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf);
524
525 if (C_CSIZE(tty)) {
526 switch (C_CSIZE(tty)) {
527 case CS5:
528 buf[6] = 5;
529 break;
530 case CS6:
531 buf[6] = 6;
532 break;
533 case CS7:
534 buf[6] = 7;
535 break;
536 default:
537 case CS8:
538 buf[6] = 8;
539 }
540 dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
541 }
542
543 /* For reference: buf[0]:buf[3] baud rate value */
544 pl2303_encode_baudrate(tty, port, spriv->type, buf);
545
546 /* For reference buf[4]=0 is 1 stop bits */
547 /* For reference buf[4]=1 is 1.5 stop bits */
548 /* For reference buf[4]=2 is 2 stop bits */
549 if (C_CSTOPB(tty)) {
550 /*
551 * NOTE: Comply with "real" UARTs / RS232:
552 * use 1.5 instead of 2 stop bits with 5 data bits
553 */
554 if (C_CSIZE(tty) == CS5) {
555 buf[4] = 1;
556 dev_dbg(&port->dev, "stop bits = 1.5\n");
557 } else {
558 buf[4] = 2;
559 dev_dbg(&port->dev, "stop bits = 2\n");
560 }
561 } else {
562 buf[4] = 0;
563 dev_dbg(&port->dev, "stop bits = 1\n");
564 }
565
566 if (C_PARENB(tty)) {
567 /* For reference buf[5]=0 is none parity */
568 /* For reference buf[5]=1 is odd parity */
569 /* For reference buf[5]=2 is even parity */
570 /* For reference buf[5]=3 is mark parity */
571 /* For reference buf[5]=4 is space parity */
572 if (C_PARODD(tty)) {
573 if (tty->termios.c_cflag & CMSPAR) {
574 buf[5] = 3;
575 dev_dbg(&port->dev, "parity = mark\n");
576 } else {
577 buf[5] = 1;
578 dev_dbg(&port->dev, "parity = odd\n");
579 }
580 } else {
581 if (tty->termios.c_cflag & CMSPAR) {
582 buf[5] = 4;
583 dev_dbg(&port->dev, "parity = space\n");
584 } else {
585 buf[5] = 2;
586 dev_dbg(&port->dev, "parity = even\n");
587 }
588 }
589 } else {
590 buf[5] = 0;
591 dev_dbg(&port->dev, "parity = none\n");
592 }
593
594 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
595 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
596 0, 0, buf, 7, 100);
597 dev_dbg(&port->dev, "0x21:0x20:0:0 %d\n", i);
598
599 /* change control lines if we are switching to or from B0 */
600 spin_lock_irqsave(&priv->lock, flags);
601 control = priv->line_control;
602 if (C_BAUD(tty) == B0)
603 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
604 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
605 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
606 if (control != priv->line_control) {
607 control = priv->line_control;
608 spin_unlock_irqrestore(&priv->lock, flags);
609 pl2303_set_control_lines(port, control);
610 } else {
611 spin_unlock_irqrestore(&priv->lock, flags);
612 }
613
614 memset(buf, 0, 7);
615 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
616 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
617 0, 0, buf, 7, 100);
618 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf);
619
620 if (C_CRTSCTS(tty)) {
621 if (spriv->type == type_0 || spriv->type == type_1)
622 pl2303_vendor_write(0x0, 0x41, serial);
623 else
624 pl2303_vendor_write(0x0, 0x61, serial);
625 } else {
626 pl2303_vendor_write(0x0, 0x0, serial);
627 }
628
629 kfree(buf);
630 }
631
632 static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
633 {
634 struct pl2303_private *priv = usb_get_serial_port_data(port);
635 unsigned long flags;
636 u8 control;
637
638 spin_lock_irqsave(&priv->lock, flags);
639 /* Change DTR and RTS */
640 if (on)
641 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
642 else
643 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
644 control = priv->line_control;
645 spin_unlock_irqrestore(&priv->lock, flags);
646 pl2303_set_control_lines(port, control);
647 }
648
649 static void pl2303_close(struct usb_serial_port *port)
650 {
651 usb_serial_generic_close(port);
652 usb_kill_urb(port->interrupt_in_urb);
653 }
654
655 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
656 {
657 struct usb_serial *serial = port->serial;
658 struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
659 int result;
660
661 if (spriv->type == type_0 || spriv->type == type_1) {
662 usb_clear_halt(serial->dev, port->write_urb->pipe);
663 usb_clear_halt(serial->dev, port->read_urb->pipe);
664 } else {
665 /* reset upstream data pipes */
666 pl2303_vendor_write(8, 0, serial);
667 pl2303_vendor_write(9, 0, serial);
668 }
669
670 /* Setup termios */
671 if (tty)
672 pl2303_set_termios(tty, port, NULL);
673
674 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
675 if (result) {
676 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
677 " error %d\n", __func__, result);
678 return result;
679 }
680
681 result = usb_serial_generic_open(tty, port);
682 if (result) {
683 usb_kill_urb(port->interrupt_in_urb);
684 return result;
685 }
686
687 return 0;
688 }
689
690 static int pl2303_tiocmset(struct tty_struct *tty,
691 unsigned int set, unsigned int clear)
692 {
693 struct usb_serial_port *port = tty->driver_data;
694 struct pl2303_private *priv = usb_get_serial_port_data(port);
695 unsigned long flags;
696 u8 control;
697 int ret;
698
699 spin_lock_irqsave(&priv->lock, flags);
700 if (set & TIOCM_RTS)
701 priv->line_control |= CONTROL_RTS;
702 if (set & TIOCM_DTR)
703 priv->line_control |= CONTROL_DTR;
704 if (clear & TIOCM_RTS)
705 priv->line_control &= ~CONTROL_RTS;
706 if (clear & TIOCM_DTR)
707 priv->line_control &= ~CONTROL_DTR;
708 control = priv->line_control;
709 spin_unlock_irqrestore(&priv->lock, flags);
710
711 ret = pl2303_set_control_lines(port, control);
712 if (ret)
713 return usb_translate_errors(ret);
714
715 return 0;
716 }
717
718 static int pl2303_tiocmget(struct tty_struct *tty)
719 {
720 struct usb_serial_port *port = tty->driver_data;
721 struct pl2303_private *priv = usb_get_serial_port_data(port);
722 unsigned long flags;
723 unsigned int mcr;
724 unsigned int status;
725 unsigned int result;
726
727 spin_lock_irqsave(&priv->lock, flags);
728 mcr = priv->line_control;
729 status = priv->line_status;
730 spin_unlock_irqrestore(&priv->lock, flags);
731
732 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
733 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
734 | ((status & UART_CTS) ? TIOCM_CTS : 0)
735 | ((status & UART_DSR) ? TIOCM_DSR : 0)
736 | ((status & UART_RING) ? TIOCM_RI : 0)
737 | ((status & UART_DCD) ? TIOCM_CD : 0);
738
739 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
740
741 return result;
742 }
743
744 static int pl2303_carrier_raised(struct usb_serial_port *port)
745 {
746 struct pl2303_private *priv = usb_get_serial_port_data(port);
747 if (priv->line_status & UART_DCD)
748 return 1;
749 return 0;
750 }
751
752 static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg)
753 {
754 struct usb_serial_port *port = tty->driver_data;
755 struct pl2303_private *priv = usb_get_serial_port_data(port);
756 unsigned long flags;
757 unsigned int prevstatus;
758 unsigned int status;
759 unsigned int changed;
760
761 spin_lock_irqsave(&priv->lock, flags);
762 prevstatus = priv->line_status;
763 spin_unlock_irqrestore(&priv->lock, flags);
764
765 while (1) {
766 interruptible_sleep_on(&port->port.delta_msr_wait);
767 /* see if a signal did it */
768 if (signal_pending(current))
769 return -ERESTARTSYS;
770
771 if (port->serial->disconnected)
772 return -EIO;
773
774 spin_lock_irqsave(&priv->lock, flags);
775 status = priv->line_status;
776 spin_unlock_irqrestore(&priv->lock, flags);
777
778 changed = prevstatus ^ status;
779
780 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
781 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
782 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
783 ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
784 return 0;
785 }
786 prevstatus = status;
787 }
788 /* NOTREACHED */
789 return 0;
790 }
791
792 static int pl2303_ioctl(struct tty_struct *tty,
793 unsigned int cmd, unsigned long arg)
794 {
795 struct serial_struct ser;
796 struct usb_serial_port *port = tty->driver_data;
797
798 dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd);
799
800 switch (cmd) {
801 case TIOCGSERIAL:
802 memset(&ser, 0, sizeof ser);
803 ser.type = PORT_16654;
804 ser.line = port->minor;
805 ser.port = port->port_number;
806 ser.baud_base = 460800;
807
808 if (copy_to_user((void __user *)arg, &ser, sizeof ser))
809 return -EFAULT;
810
811 return 0;
812 default:
813 dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd);
814 break;
815 }
816 return -ENOIOCTLCMD;
817 }
818
819 static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
820 {
821 struct usb_serial_port *port = tty->driver_data;
822 struct usb_serial *serial = port->serial;
823 u16 state;
824 int result;
825
826 if (break_state == 0)
827 state = BREAK_OFF;
828 else
829 state = BREAK_ON;
830 dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
831 state == BREAK_OFF ? "off" : "on");
832
833 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
834 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
835 0, NULL, 0, 100);
836 /* NOTE: HX clones don't support sending breaks, -EPIPE is returned */
837 if (result)
838 dev_err(&port->dev, "error sending break = %d\n", result);
839 }
840
841 static void pl2303_update_line_status(struct usb_serial_port *port,
842 unsigned char *data,
843 unsigned int actual_length)
844 {
845
846 struct pl2303_private *priv = usb_get_serial_port_data(port);
847 struct tty_struct *tty;
848 unsigned long flags;
849 u8 status_idx = UART_STATE;
850 u8 length = UART_STATE + 1;
851 u8 prev_line_status;
852 u16 idv, idp;
853
854 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
855 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
856
857
858 if (idv == SIEMENS_VENDOR_ID) {
859 if (idp == SIEMENS_PRODUCT_ID_X65 ||
860 idp == SIEMENS_PRODUCT_ID_SX1 ||
861 idp == SIEMENS_PRODUCT_ID_X75) {
862
863 length = 1;
864 status_idx = 0;
865 }
866 }
867
868 if (actual_length < length)
869 return;
870
871 /* Save off the uart status for others to look at */
872 spin_lock_irqsave(&priv->lock, flags);
873 prev_line_status = priv->line_status;
874 priv->line_status = data[status_idx];
875 spin_unlock_irqrestore(&priv->lock, flags);
876 if (priv->line_status & UART_BREAK_ERROR)
877 usb_serial_handle_break(port);
878 wake_up_interruptible(&port->port.delta_msr_wait);
879
880 tty = tty_port_tty_get(&port->port);
881 if (!tty)
882 return;
883 if ((priv->line_status ^ prev_line_status) & UART_DCD)
884 usb_serial_handle_dcd_change(port, tty,
885 priv->line_status & UART_DCD);
886 tty_kref_put(tty);
887 }
888
889 static void pl2303_read_int_callback(struct urb *urb)
890 {
891 struct usb_serial_port *port = urb->context;
892 unsigned char *data = urb->transfer_buffer;
893 unsigned int actual_length = urb->actual_length;
894 int status = urb->status;
895 int retval;
896
897 switch (status) {
898 case 0:
899 /* success */
900 break;
901 case -ECONNRESET:
902 case -ENOENT:
903 case -ESHUTDOWN:
904 /* this urb is terminated, clean up */
905 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
906 __func__, status);
907 return;
908 default:
909 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
910 __func__, status);
911 goto exit;
912 }
913
914 usb_serial_debug_data(&port->dev, __func__,
915 urb->actual_length, urb->transfer_buffer);
916
917 pl2303_update_line_status(port, data, actual_length);
918
919 exit:
920 retval = usb_submit_urb(urb, GFP_ATOMIC);
921 if (retval)
922 dev_err(&port->dev,
923 "%s - usb_submit_urb failed with result %d\n",
924 __func__, retval);
925 }
926
927 static void pl2303_process_read_urb(struct urb *urb)
928 {
929 struct usb_serial_port *port = urb->context;
930 struct pl2303_private *priv = usb_get_serial_port_data(port);
931 unsigned char *data = urb->transfer_buffer;
932 char tty_flag = TTY_NORMAL;
933 unsigned long flags;
934 u8 line_status;
935 int i;
936
937 /* update line status */
938 spin_lock_irqsave(&priv->lock, flags);
939 line_status = priv->line_status;
940 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
941 spin_unlock_irqrestore(&priv->lock, flags);
942 wake_up_interruptible(&port->port.delta_msr_wait);
943
944 if (!urb->actual_length)
945 return;
946
947 /* break takes precedence over parity, */
948 /* which takes precedence over framing errors */
949 if (line_status & UART_BREAK_ERROR)
950 tty_flag = TTY_BREAK;
951 else if (line_status & UART_PARITY_ERROR)
952 tty_flag = TTY_PARITY;
953 else if (line_status & UART_FRAME_ERROR)
954 tty_flag = TTY_FRAME;
955
956 if (tty_flag != TTY_NORMAL)
957 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__,
958 tty_flag);
959 /* overrun is special, not associated with a char */
960 if (line_status & UART_OVERRUN_ERROR)
961 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
962
963 if (port->port.console && port->sysrq) {
964 for (i = 0; i < urb->actual_length; ++i)
965 if (!usb_serial_handle_sysrq_char(port, data[i]))
966 tty_insert_flip_char(&port->port, data[i],
967 tty_flag);
968 } else {
969 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
970 urb->actual_length);
971 }
972
973 tty_flip_buffer_push(&port->port);
974 }
975
976 /* All of the device info needed for the PL2303 SIO serial converter */
977 static struct usb_serial_driver pl2303_device = {
978 .driver = {
979 .owner = THIS_MODULE,
980 .name = "pl2303",
981 },
982 .id_table = id_table,
983 .num_ports = 1,
984 .bulk_in_size = 256,
985 .bulk_out_size = 256,
986 .open = pl2303_open,
987 .close = pl2303_close,
988 .dtr_rts = pl2303_dtr_rts,
989 .carrier_raised = pl2303_carrier_raised,
990 .ioctl = pl2303_ioctl,
991 .break_ctl = pl2303_break_ctl,
992 .set_termios = pl2303_set_termios,
993 .tiocmget = pl2303_tiocmget,
994 .tiocmset = pl2303_tiocmset,
995 .tiocmiwait = pl2303_tiocmiwait,
996 .process_read_urb = pl2303_process_read_urb,
997 .read_int_callback = pl2303_read_int_callback,
998 .attach = pl2303_startup,
999 .release = pl2303_release,
1000 .port_probe = pl2303_port_probe,
1001 .port_remove = pl2303_port_remove,
1002 };
1003
1004 static struct usb_serial_driver * const serial_drivers[] = {
1005 &pl2303_device, NULL
1006 };
1007
1008 module_usb_serial_driver(serial_drivers, id_table);
1009
1010 MODULE_DESCRIPTION(DRIVER_DESC);
1011 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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