pl2303.c 31 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
1
2
3
4
5
6
7
8
9
10
/*
 * Prolific PL2303 USB to serial adaptor driver
 *
 * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
 * Copyright (C) 2003 IBM Corp.
 *
 * Original driver for 2.2.x by anonymous
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
11
 *	the Free Software Foundation; either version 2 of the License.
Linus Torvalds's avatar
Linus Torvalds committed
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
 *
 * See Documentation/usb/usb-serial.txt for more information on using this driver
 *
 */

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/serial.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/spinlock.h>
#include <asm/uaccess.h>
#include <linux/usb.h>
30
#include <linux/usb/serial.h>
Linus Torvalds's avatar
Linus Torvalds committed
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
#include "pl2303.h"

/*
 * Version Information
 */
#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"

static int debug;

#define PL2303_CLOSING_WAIT	(30*HZ)

#define PL2303_BUF_SIZE		1024
#define PL2303_TMP_BUF_SIZE	1024

struct pl2303_buf {
	unsigned int	buf_size;
	char		*buf_buf;
	char		*buf_get;
	char		*buf_put;
};

static struct usb_device_id id_table [] = {
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
55
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
Linus Torvalds's avatar
Linus Torvalds committed
56
57
58
59
60
61
62
63
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
	{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
	{ USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
	{ USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
	{ USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
	{ USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
	{ USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
64
	{ USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
Linus Torvalds's avatar
Linus Torvalds committed
65
66
67
68
69
70
71
72
	{ USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
	{ USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
	{ USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
	{ USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
	{ USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
	{ USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
	{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
	{ USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
73
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
Linus Torvalds's avatar
Linus Torvalds committed
74
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
75
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
76
	{ USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
77
78
	{ USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
	{ USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
79
	{ USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
80
	{ USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
81
	{ USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
82
	{ USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
83
	{ USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
84
	{ USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
85
	{ USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_ID) },
86
	{ USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
Linus Torvalds's avatar
Linus Torvalds committed
87
88
89
	{ }					/* Terminating entry */
};

90
MODULE_DEVICE_TABLE(usb, id_table);
Linus Torvalds's avatar
Linus Torvalds committed
91
92
93
94
95
96

static struct usb_driver pl2303_driver = {
	.name =		"pl2303",
	.probe =	usb_serial_probe,
	.disconnect =	usb_serial_disconnect,
	.id_table =	id_table,
97
	.no_dynamic_id = 	1,
Linus Torvalds's avatar
Linus Torvalds committed
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
};

#define SET_LINE_REQUEST_TYPE		0x21
#define SET_LINE_REQUEST		0x20

#define SET_CONTROL_REQUEST_TYPE	0x21
#define SET_CONTROL_REQUEST		0x22
#define CONTROL_DTR			0x01
#define CONTROL_RTS			0x02

#define BREAK_REQUEST_TYPE		0x21
#define BREAK_REQUEST			0x23	
#define BREAK_ON			0xffff
#define BREAK_OFF			0x0000

#define GET_LINE_REQUEST_TYPE		0xa1
#define GET_LINE_REQUEST		0x21

#define VENDOR_WRITE_REQUEST_TYPE	0x40
#define VENDOR_WRITE_REQUEST		0x01

#define VENDOR_READ_REQUEST_TYPE	0xc0
#define VENDOR_READ_REQUEST		0x01

#define UART_STATE			0x08
#define UART_STATE_TRANSIENT_MASK	0x74
#define UART_DCD			0x01
#define UART_DSR			0x02
#define UART_BREAK_ERROR		0x04
#define UART_RING			0x08
#define UART_FRAME_ERROR		0x10
#define UART_PARITY_ERROR		0x20
#define UART_OVERRUN_ERROR		0x40
#define UART_CTS			0x80


enum pl2303_type {
	type_0,		/* don't know the difference between type 0 and */
	type_1,		/* type 1, until someone from prolific tells us... */
	HX,		/* HX version of the pl2303 chip */
};

struct pl2303_private {
	spinlock_t lock;
	struct pl2303_buf *buf;
	int write_urb_in_use;
	wait_queue_head_t delta_msr_wait;
	u8 line_control;
	u8 line_status;
	u8 termios_initialized;
	enum pl2303_type type;
};

151
152
153
154
155
156
157
158
159
160
161
162
/*
 * pl2303_buf_alloc
 *
 * Allocate a circular buffer and all associated memory.
 */
static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
{
	struct pl2303_buf *pb;

	if (size == 0)
		return NULL;

163
	pb = kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
	if (pb == NULL)
		return NULL;

	pb->buf_buf = kmalloc(size, GFP_KERNEL);
	if (pb->buf_buf == NULL) {
		kfree(pb);
		return NULL;
	}

	pb->buf_size = size;
	pb->buf_get = pb->buf_put = pb->buf_buf;

	return pb;
}

/*
 * pl2303_buf_free
 *
 * Free the buffer and all associated memory.
 */
static void pl2303_buf_free(struct pl2303_buf *pb)
{
	if (pb) {
		kfree(pb->buf_buf);
		kfree(pb);
	}
}

/*
 * pl2303_buf_clear
 *
 * Clear out all data in the circular buffer.
 */
static void pl2303_buf_clear(struct pl2303_buf *pb)
{
	if (pb != NULL)
		pb->buf_get = pb->buf_put;
		/* equivalent to a get of all data available */
}

/*
 * pl2303_buf_data_avail
 *
 * Return the number of bytes of data available in the circular
 * buffer.
 */
static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
{
	if (pb == NULL)
		return 0;

	return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
}

/*
 * pl2303_buf_space_avail
 *
 * Return the number of bytes of space available in the circular
 * buffer.
 */
static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
{
	if (pb == NULL)
		return 0;

	return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
}

/*
 * pl2303_buf_put
 *
 * Copy data data from a user buffer and put it into the circular buffer.
 * Restrict to the amount of space available.
 *
 * Return the number of bytes copied.
 */
static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
				   unsigned int count)
{
	unsigned int len;

	if (pb == NULL)
		return 0;

	len  = pl2303_buf_space_avail(pb);
	if (count > len)
		count = len;

	if (count == 0)
		return 0;

	len = pb->buf_buf + pb->buf_size - pb->buf_put;
	if (count > len) {
		memcpy(pb->buf_put, buf, len);
		memcpy(pb->buf_buf, buf+len, count - len);
		pb->buf_put = pb->buf_buf + count - len;
	} else {
		memcpy(pb->buf_put, buf, count);
		if (count < len)
			pb->buf_put += count;
		else /* count == len */
			pb->buf_put = pb->buf_buf;
	}

	return count;
}

/*
 * pl2303_buf_get
 *
 * Get data from the circular buffer and copy to the given buffer.
 * Restrict to the amount of data available.
 *
 * Return the number of bytes copied.
 */
static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
				   unsigned int count)
{
	unsigned int len;

	if (pb == NULL)
		return 0;

	len = pl2303_buf_data_avail(pb);
	if (count > len)
		count = len;

	if (count == 0)
		return 0;

	len = pb->buf_buf + pb->buf_size - pb->buf_get;
	if (count > len) {
		memcpy(buf, pb->buf_get, len);
		memcpy(buf+len, pb->buf_buf, count - len);
		pb->buf_get = pb->buf_buf + count - len;
	} else {
		memcpy(buf, pb->buf_get, count);
		if (count < len)
			pb->buf_get += count;
		else /* count == len */
			pb->buf_get = pb->buf_buf;
	}

	return count;
}
Linus Torvalds's avatar
Linus Torvalds committed
309

310
static int pl2303_startup(struct usb_serial *serial)
Linus Torvalds's avatar
Linus Torvalds committed
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
{
	struct pl2303_private *priv;
	enum pl2303_type type = type_0;
	int i;

	if (serial->dev->descriptor.bDeviceClass == 0x02)
		type = type_0;
	else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
		type = HX;
	else if (serial->dev->descriptor.bDeviceClass == 0x00)
		type = type_1;
	else if (serial->dev->descriptor.bDeviceClass == 0xFF)
		type = type_1;
	dbg("device type: %d", type);

	for (i = 0; i < serial->num_ports; ++i) {
327
		priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
		if (!priv)
			goto cleanup;
		spin_lock_init(&priv->lock);
		priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
		if (priv->buf == NULL) {
			kfree(priv);
			goto cleanup;
		}
		init_waitqueue_head(&priv->delta_msr_wait);
		priv->type = type;
		usb_set_serial_port_data(serial->port[i], priv);
	}
	return 0;

cleanup:
	for (--i; i>=0; --i) {
		priv = usb_get_serial_port_data(serial->port[i]);
		pl2303_buf_free(priv->buf);
		kfree(priv);
		usb_set_serial_port_data(serial->port[i], NULL);
	}
	return -ENOMEM;
}

352
static int set_control_lines(struct usb_device *dev, u8 value)
Linus Torvalds's avatar
Linus Torvalds committed
353
354
355
{
	int retval;
	
356
357
358
	retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
				 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
				 value, 0, NULL, 0, 100);
Linus Torvalds's avatar
Linus Torvalds committed
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
	dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval);
	return retval;
}

static void pl2303_send(struct usb_serial_port *port)
{
	int count, result;
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;

	dbg("%s - port %d", __FUNCTION__, port->number);

	spin_lock_irqsave(&priv->lock, flags);

	if (priv->write_urb_in_use) {
		spin_unlock_irqrestore(&priv->lock, flags);
		return;
	}

	count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
379
			       port->bulk_out_size);
Linus Torvalds's avatar
Linus Torvalds committed
380
381
382
383
384
385
386
387
388
389

	if (count == 0) {
		spin_unlock_irqrestore(&priv->lock, flags);
		return;
	}

	priv->write_urb_in_use = 1;

	spin_unlock_irqrestore(&priv->lock, flags);

390
391
	usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count,
			      port->write_urb->transfer_buffer);
Linus Torvalds's avatar
Linus Torvalds committed
392
393
394

	port->write_urb->transfer_buffer_length = count;
	port->write_urb->dev = port->serial->dev;
395
	result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
Linus Torvalds's avatar
Linus Torvalds committed
396
	if (result) {
397
398
		dev_err(&port->dev, "%s - failed submitting write urb,"
			" error %d\n", __FUNCTION__, result);
Linus Torvalds's avatar
Linus Torvalds committed
399
400
401
402
		priv->write_urb_in_use = 0;
		// TODO: reschedule pl2303_send
	}

403
	usb_serial_port_softint(port);
Linus Torvalds's avatar
Linus Torvalds committed
404
405
}

406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
static int pl2303_write(struct usb_serial_port *port, const unsigned char *buf,
			int count)
{
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;

	dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);

	if (!count)
		return count;

	spin_lock_irqsave(&priv->lock, flags);
	count = pl2303_buf_put(priv->buf, buf, count);
	spin_unlock_irqrestore(&priv->lock, flags);

	pl2303_send(port);

	return count;
}

Linus Torvalds's avatar
Linus Torvalds committed
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
static int pl2303_write_room(struct usb_serial_port *port)
{
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	int room = 0;
	unsigned long flags;

	dbg("%s - port %d", __FUNCTION__, port->number);

	spin_lock_irqsave(&priv->lock, flags);
	room = pl2303_buf_space_avail(priv->buf);
	spin_unlock_irqrestore(&priv->lock, flags);

	dbg("%s - returns %d", __FUNCTION__, room);
	return room;
}

static int pl2303_chars_in_buffer(struct usb_serial_port *port)
{
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	int chars = 0;
	unsigned long flags;

	dbg("%s - port %d", __FUNCTION__, port->number);

	spin_lock_irqsave(&priv->lock, flags);
	chars = pl2303_buf_data_avail(priv->buf);
	spin_unlock_irqrestore(&priv->lock, flags);

	dbg("%s - returns %d", __FUNCTION__, chars);
	return chars;
}

458
static void pl2303_set_termios(struct usb_serial_port *port,
Alan Cox's avatar
Alan Cox committed
459
			       struct ktermios *old_termios)
Linus Torvalds's avatar
Linus Torvalds committed
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
{
	struct usb_serial *serial = port->serial;
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int cflag;
	unsigned char *buf;
	int baud;
	int i;
	u8 control;

	dbg("%s -  port %d", __FUNCTION__, port->number);

	if ((!port->tty) || (!port->tty->termios)) {
		dbg("%s - no tty structures", __FUNCTION__);
		return;
	}

	spin_lock_irqsave(&priv->lock, flags);
	if (!priv->termios_initialized) {
		*(port->tty->termios) = tty_std_termios;
480
481
		port->tty->termios->c_cflag = B9600 | CS8 | CREAD |
					      HUPCL | CLOCAL;
Linus Torvalds's avatar
Linus Torvalds committed
482
483
484
485
486
487
488
489
		priv->termios_initialized = 1;
	}
	spin_unlock_irqrestore(&priv->lock, flags);

	cflag = port->tty->termios->c_cflag;
	/* check that they really want us to change something */
	if (old_termios) {
		if ((cflag == old_termios->c_cflag) &&
490
491
492
493
		    (RELEVANT_IFLAG(port->tty->termios->c_iflag) ==
		     RELEVANT_IFLAG(old_termios->c_iflag))) {
			dbg("%s - nothing to change...", __FUNCTION__);
			return;
Linus Torvalds's avatar
Linus Torvalds committed
494
495
496
		}
	}

497
	buf = kzalloc(7, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
498
499
500
501
502
	if (!buf) {
		dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
		return;
	}

503
504
505
506
507
	i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
			    GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
	dbg("0xa1:0x21:0:0  %d - %x %x %x %x %x %x %x", i,
	    buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
Linus Torvalds's avatar
Linus Torvalds committed
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538

	if (cflag & CSIZE) {
		switch (cflag & CSIZE) {
			case CS5:	buf[6] = 5;	break;
			case CS6:	buf[6] = 6;	break;
			case CS7:	buf[6] = 7;	break;
			default:
			case CS8:	buf[6] = 8;	break;
		}
		dbg("%s - data bits = %d", __FUNCTION__, buf[6]);
	}

	baud = 0;
	switch (cflag & CBAUD) {
		case B0:	baud = 0;	break;
		case B75:	baud = 75;	break;
		case B150:	baud = 150;	break;
		case B300:	baud = 300;	break;
		case B600:	baud = 600;	break;
		case B1200:	baud = 1200;	break;
		case B1800:	baud = 1800;	break;
		case B2400:	baud = 2400;	break;
		case B4800:	baud = 4800;	break;
		case B9600:	baud = 9600;	break;
		case B19200:	baud = 19200;	break;
		case B38400:	baud = 38400;	break;
		case B57600:	baud = 57600;	break;
		case B115200:	baud = 115200;	break;
		case B230400:	baud = 230400;	break;
		case B460800:	baud = 460800;	break;
		default:
539
540
			dev_err(&port->dev, "pl2303 driver does not support"
				" the baudrate requested (fix it)\n");
Linus Torvalds's avatar
Linus Torvalds committed
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
			break;
	}
	dbg("%s - baud = %d", __FUNCTION__, baud);
	if (baud) {
		buf[0] = baud & 0xff;
		buf[1] = (baud >> 8) & 0xff;
		buf[2] = (baud >> 16) & 0xff;
		buf[3] = (baud >> 24) & 0xff;
	}

	/* For reference buf[4]=0 is 1 stop bits */
	/* For reference buf[4]=1 is 1.5 stop bits */
	/* For reference buf[4]=2 is 2 stop bits */
	if (cflag & CSTOPB) {
		buf[4] = 2;
		dbg("%s - stop bits = 2", __FUNCTION__);
	} else {
		buf[4] = 0;
		dbg("%s - stop bits = 1", __FUNCTION__);
	}

	if (cflag & PARENB) {
		/* For reference buf[5]=0 is none parity */
		/* For reference buf[5]=1 is odd parity */
		/* For reference buf[5]=2 is even parity */
		/* For reference buf[5]=3 is mark parity */
		/* For reference buf[5]=4 is space parity */
		if (cflag & PARODD) {
			buf[5] = 1;
			dbg("%s - parity = odd", __FUNCTION__);
		} else {
			buf[5] = 2;
			dbg("%s - parity = even", __FUNCTION__);
		}
	} else {
		buf[5] = 0;
		dbg("%s - parity = none", __FUNCTION__);
	}

580
581
582
583
	i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
			    SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
	dbg("0x21:0x20:0:0  %d", i);
Linus Torvalds's avatar
Linus Torvalds committed
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598

	/* change control lines if we are switching to or from B0 */
	spin_lock_irqsave(&priv->lock, flags);
	control = priv->line_control;
	if ((cflag & CBAUD) == B0)
		priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
	else
		priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
	if (control != priv->line_control) {
		control = priv->line_control;
		spin_unlock_irqrestore(&priv->lock, flags);
		set_control_lines(serial->dev, control);
	} else {
		spin_unlock_irqrestore(&priv->lock, flags);
	}
599

Linus Torvalds's avatar
Linus Torvalds committed
600
601
	buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;

602
603
604
605
	i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
			    GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
	dbg("0xa1:0x21:0:0  %d - %x %x %x %x %x %x %x", i,
Linus Torvalds's avatar
Linus Torvalds committed
606
607
608
609
610
611
612
613
	     buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);

	if (cflag & CRTSCTS) {
		__u16 index;
		if (priv->type == HX)
			index = 0x61;
		else
			index = 0x41;
614
		i = usb_control_msg(serial->dev,
Linus Torvalds's avatar
Linus Torvalds committed
615
616
617
618
				    usb_sndctrlpipe(serial->dev, 0),
				    VENDOR_WRITE_REQUEST,
				    VENDOR_WRITE_REQUEST_TYPE,
				    0x0, index, NULL, 0, 100);
619
		dbg("0x40:0x1:0x0:0x%x  %d", index, i);
t.sefzick's avatar
t.sefzick committed
620
621
622
623
624
625
626
	} else {
		i = usb_control_msg(serial->dev,
				    usb_sndctrlpipe(serial->dev, 0),
				    VENDOR_WRITE_REQUEST,
				    VENDOR_WRITE_REQUEST_TYPE,
				    0x0, 0x0, NULL, 0, 100);
		dbg ("0x40:0x1:0x0:0x0  %d", i);
Linus Torvalds's avatar
Linus Torvalds committed
627
	}
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693

	kfree(buf);
}

static void pl2303_close(struct usb_serial_port *port, struct file *filp)
{
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int c_cflag;
	int bps;
	long timeout;
	wait_queue_t wait;

	dbg("%s - port %d", __FUNCTION__, port->number);

	/* wait for data to drain from the buffer */
	spin_lock_irqsave(&priv->lock, flags);
	timeout = PL2303_CLOSING_WAIT;
	init_waitqueue_entry(&wait, current);
	add_wait_queue(&port->tty->write_wait, &wait);
	for (;;) {
		set_current_state(TASK_INTERRUPTIBLE);
		if (pl2303_buf_data_avail(priv->buf) == 0 ||
		    timeout == 0 || signal_pending(current) ||
		    !usb_get_intfdata(port->serial->interface))	/* disconnect */
			break;
		spin_unlock_irqrestore(&priv->lock, flags);
		timeout = schedule_timeout(timeout);
		spin_lock_irqsave(&priv->lock, flags);
	}
	set_current_state(TASK_RUNNING);
	remove_wait_queue(&port->tty->write_wait, &wait);
	/* clear out any remaining data in the buffer */
	pl2303_buf_clear(priv->buf);
	spin_unlock_irqrestore(&priv->lock, flags);

	/* wait for characters to drain from the device */
	/* (this is long enough for the entire 256 byte */
	/* pl2303 hardware buffer to drain with no flow */
	/* control for data rates of 1200 bps or more, */
	/* for lower rates we should really know how much */
	/* data is in the buffer to compute a delay */
	/* that is not unnecessarily long) */
	bps = tty_get_baud_rate(port->tty);
	if (bps > 1200)
		timeout = max((HZ*2560)/bps,HZ/10);
	else
		timeout = 2*HZ;
	schedule_timeout_interruptible(timeout);

	/* shutdown our urbs */
	dbg("%s - shutting down urbs", __FUNCTION__);
	usb_kill_urb(port->write_urb);
	usb_kill_urb(port->read_urb);
	usb_kill_urb(port->interrupt_in_urb);

	if (port->tty) {
		c_cflag = port->tty->termios->c_cflag;
		if (c_cflag & HUPCL) {
			/* drop DTR and RTS */
			spin_lock_irqsave(&priv->lock, flags);
			priv->line_control = 0;
			spin_unlock_irqrestore(&priv->lock, flags);
			set_control_lines(port->serial->dev, 0);
		}
	}
Linus Torvalds's avatar
Linus Torvalds committed
694
695
}

696
static int pl2303_open(struct usb_serial_port *port, struct file *filp)
Linus Torvalds's avatar
Linus Torvalds committed
697
{
Alan Cox's avatar
Alan Cox committed
698
	struct ktermios tmp_termios;
Linus Torvalds's avatar
Linus Torvalds committed
699
700
701
702
703
704
705
	struct usb_serial *serial = port->serial;
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned char *buf;
	int result;

	dbg("%s -  port %d", __FUNCTION__, port->number);

706
707
708
709
	if (priv->type != HX) {
		usb_clear_halt(serial->dev, port->write_urb->pipe);
		usb_clear_halt(serial->dev, port->read_urb->pipe);
	}
Linus Torvalds's avatar
Linus Torvalds committed
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749

	buf = kmalloc(10, GFP_KERNEL);
	if (buf==NULL)
		return -ENOMEM;

#define FISH(a,b,c,d)								\
	result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0),	\
			       b, a, c, d, buf, 1, 100);			\
	dbg("0x%x:0x%x:0x%x:0x%x  %d - %x",a,b,c,d,result,buf[0]);

#define SOUP(a,b,c,d)								\
	result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0),	\
			       b, a, c, d, NULL, 0, 100);			\
	dbg("0x%x:0x%x:0x%x:0x%x  %d",a,b,c,d,result);

	FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
	SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0);
	FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
	FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
	FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
	SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1);
	FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
	FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
	SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1);
	SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0);

	if (priv->type == HX) {
		/* HX chip */
		SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44);
		/* reset upstream data pipes */
          	SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0);
        	SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0);
	} else {
		SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24);
	}

	kfree(buf);

	/* Setup termios */
	if (port->tty) {
750
		pl2303_set_termios(port, &tmp_termios);
Linus Torvalds's avatar
Linus Torvalds committed
751
752
753
754
755
756
	}

	//FIXME: need to assert RTS and DTR if CRTSCTS off

	dbg("%s - submitting read urb", __FUNCTION__);
	port->read_urb->dev = serial->dev;
757
	result = usb_submit_urb(port->read_urb, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
758
	if (result) {
759
760
761
		dev_err(&port->dev, "%s - failed submitting read urb,"
			" error %d\n", __FUNCTION__, result);
		pl2303_close(port, NULL);
Linus Torvalds's avatar
Linus Torvalds committed
762
763
764
765
766
		return -EPROTO;
	}

	dbg("%s - submitting interrupt urb", __FUNCTION__);
	port->interrupt_in_urb->dev = serial->dev;
767
	result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
768
	if (result) {
769
770
771
		dev_err(&port->dev, "%s - failed submitting interrupt urb,"
			" error %d\n", __FUNCTION__, result);
		pl2303_close(port, NULL);
Linus Torvalds's avatar
Linus Torvalds committed
772
773
774
775
776
		return -EPROTO;
	}
	return 0;
}

777
778
static int pl2303_tiocmset(struct usb_serial_port *port, struct file *file,
			   unsigned int set, unsigned int clear)
Linus Torvalds's avatar
Linus Torvalds committed
779
780
781
782
783
{
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	u8 control;

784
785
786
	if (!usb_get_intfdata(port->serial->interface))
		return -ENODEV;

787
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
788
789
790
791
792
793
794
795
796
	if (set & TIOCM_RTS)
		priv->line_control |= CONTROL_RTS;
	if (set & TIOCM_DTR)
		priv->line_control |= CONTROL_DTR;
	if (clear & TIOCM_RTS)
		priv->line_control &= ~CONTROL_RTS;
	if (clear & TIOCM_DTR)
		priv->line_control &= ~CONTROL_DTR;
	control = priv->line_control;
797
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
798

799
	return set_control_lines(port->serial->dev, control);
Linus Torvalds's avatar
Linus Torvalds committed
800
801
}

802
static int pl2303_tiocmget(struct usb_serial_port *port, struct file *file)
Linus Torvalds's avatar
Linus Torvalds committed
803
804
805
806
807
808
809
810
811
{
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int mcr;
	unsigned int status;
	unsigned int result;

	dbg("%s (%d)", __FUNCTION__, port->number);

812
813
814
	if (!usb_get_intfdata(port->serial->interface))
		return -ENODEV;

815
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
816
817
	mcr = priv->line_control;
	status = priv->line_status;
818
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839

	result = ((mcr & CONTROL_DTR)		? TIOCM_DTR : 0)
		  | ((mcr & CONTROL_RTS)	? TIOCM_RTS : 0)
		  | ((status & UART_CTS)	? TIOCM_CTS : 0)
		  | ((status & UART_DSR)	? TIOCM_DSR : 0)
		  | ((status & UART_RING)	? TIOCM_RI  : 0)
		  | ((status & UART_DCD)	? TIOCM_CD  : 0);

	dbg("%s - result = %x", __FUNCTION__, result);

	return result;
}

static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
{
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int prevstatus;
	unsigned int status;
	unsigned int changed;

840
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
841
	prevstatus = priv->line_status;
842
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
843
844
845
846
847
848

	while (1) {
		interruptible_sleep_on(&priv->delta_msr_wait);
		/* see if a signal did it */
		if (signal_pending(current))
			return -ERESTARTSYS;
849
850

		spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
851
		status = priv->line_status;
852
853
		spin_unlock_irqrestore(&priv->lock, flags);

Linus Torvalds's avatar
Linus Torvalds committed
854
		changed=prevstatus^status;
855

Linus Torvalds's avatar
Linus Torvalds committed
856
857
858
859
860
861
862
863
864
865
866
867
		if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
		    ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
		    ((arg & TIOCM_CD)  && (changed & UART_DCD)) ||
		    ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) {
			return 0;
		}
		prevstatus = status;
	}
	/* NOTREACHED */
	return 0;
}

868
869
static int pl2303_ioctl(struct usb_serial_port *port, struct file *file,
			unsigned int cmd, unsigned long arg)
Linus Torvalds's avatar
Linus Torvalds committed
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
{
	dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd);

	switch (cmd) {
		case TIOCMIWAIT:
			dbg("%s (%d) TIOCMIWAIT", __FUNCTION__,  port->number);
			return wait_modem_info(port, arg);

		default:
			dbg("%s not supported = 0x%04x", __FUNCTION__, cmd);
			break;
	}

	return -ENOIOCTLCMD;
}

886
static void pl2303_break_ctl(struct usb_serial_port *port, int break_state)
Linus Torvalds's avatar
Linus Torvalds committed
887
888
889
890
891
892
893
894
895
896
897
898
899
{
	struct usb_serial *serial = port->serial;
	u16 state;
	int result;

	dbg("%s - port %d", __FUNCTION__, port->number);

	if (break_state == 0)
		state = BREAK_OFF;
	else
		state = BREAK_ON;
	dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on");

900
901
902
	result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
				 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
				 0, NULL, 0, 100);
Linus Torvalds's avatar
Linus Torvalds committed
903
904
905
906
	if (result)
		dbg("%s - error sending break = %d", __FUNCTION__, result);
}

907
static void pl2303_shutdown(struct usb_serial *serial)
Linus Torvalds's avatar
Linus Torvalds committed
908
909
910
911
912
913
914
915
916
917
918
919
920
{
	int i;
	struct pl2303_private *priv;

	dbg("%s", __FUNCTION__);

	for (i = 0; i < serial->num_ports; ++i) {
		priv = usb_get_serial_port_data(serial->port[i]);
		if (priv) {
			pl2303_buf_free(priv->buf);
			kfree(priv);
			usb_set_serial_port_data(serial->port[i], NULL);
		}
921
	}
Linus Torvalds's avatar
Linus Torvalds committed
922
923
}

Flavio Leitner's avatar
Flavio Leitner committed
924
925
926
927
928
929
930
931
static void pl2303_update_line_status(struct usb_serial_port *port,
				      unsigned char *data,
				      unsigned int actual_length)
{

	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	u8 status_idx = UART_STATE;
932
	u8 length = UART_STATE + 1;
933
	u16 idv, idp;
Flavio Leitner's avatar
Flavio Leitner committed
934

935
936
937
938
939
940
941
942
943
944
945
946
	idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
	idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);


	if (idv == SIEMENS_VENDOR_ID) {
		if (idp == SIEMENS_PRODUCT_ID_X65 ||
		    idp == SIEMENS_PRODUCT_ID_SX1 ||
		    idp == SIEMENS_PRODUCT_ID_X75) {

			length = 1;
			status_idx = 0;
		}
Flavio Leitner's avatar
Flavio Leitner committed
947
948
949
	}

	if (actual_length < length)
950
		return;
Flavio Leitner's avatar
Flavio Leitner committed
951
952
953
954
955

        /* Save off the uart status for others to look at */
	spin_lock_irqsave(&priv->lock, flags);
	priv->line_status = data[status_idx];
	spin_unlock_irqrestore(&priv->lock, flags);
956
	wake_up_interruptible(&priv->delta_msr_wait);
Flavio Leitner's avatar
Flavio Leitner committed
957
}
Linus Torvalds's avatar
Linus Torvalds committed
958

959
static void pl2303_read_int_callback(struct urb *urb)
Linus Torvalds's avatar
Linus Torvalds committed
960
961
962
{
	struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
	unsigned char *data = urb->transfer_buffer;
Flavio Leitner's avatar
Flavio Leitner committed
963
	unsigned int actual_length = urb->actual_length;
Linus Torvalds's avatar
Linus Torvalds committed
964
965
966
967
968
969
970
971
972
973
974
975
	int status;

	dbg("%s (%d)", __FUNCTION__, port->number);

	switch (urb->status) {
	case 0:
		/* success */
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
976
977
		dbg("%s - urb shutting down with status: %d", __FUNCTION__,
		    urb->status);
Linus Torvalds's avatar
Linus Torvalds committed
978
979
		return;
	default:
980
981
		dbg("%s - nonzero urb status received: %d", __FUNCTION__,
		    urb->status);
Linus Torvalds's avatar
Linus Torvalds committed
982
983
984
		goto exit;
	}

985
986
987
	usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
			      urb->actual_length, urb->transfer_buffer);

Flavio Leitner's avatar
Flavio Leitner committed
988
	pl2303_update_line_status(port, data, actual_length);
Linus Torvalds's avatar
Linus Torvalds committed
989
990

exit:
991
	status = usb_submit_urb(urb, GFP_ATOMIC);
Linus Torvalds's avatar
Linus Torvalds committed
992
	if (status)
993
994
		dev_err(&urb->dev->dev,
			"%s - usb_submit_urb failed with result %d\n",
Linus Torvalds's avatar
Linus Torvalds committed
995
996
997
			__FUNCTION__, status);
}

998
static void pl2303_read_bulk_callback(struct urb *urb)
Linus Torvalds's avatar
Linus Torvalds committed
999
1000
{
	struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
For faster browsing, not all history is shown. View entire blame