pl2303.c 31.7 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
1
2
3
/*
 * Prolific PL2303 USB to serial adaptor driver
 *
4
 * Copyright (C) 2001-2007 Greg Kroah-Hartman (greg@kroah.com)
Linus Torvalds's avatar
Linus Torvalds committed
5
6
7
8
 * Copyright (C) 2003 IBM Corp.
 *
 * Original driver for 2.2.x by anonymous
 *
9
10
11
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License version
 *	2 as published by the Free Software Foundation.
Linus Torvalds's avatar
Linus Torvalds committed
12
 *
Alan Cox's avatar
Alan Cox committed
13
14
 * See Documentation/usb/usb-serial.txt for more information on using this
 * driver
Linus Torvalds's avatar
Linus Torvalds committed
15
16
17
18
19
20
21
22
23
24
25
26
27
28
 *
 */

#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>
Alan Cox's avatar
Alan Cox committed
29
#include <linux/uaccess.h>
Linus Torvalds's avatar
Linus Torvalds committed
30
#include <linux/usb.h>
31
#include <linux/usb/serial.h>
Linus Torvalds's avatar
Linus Torvalds committed
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
#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;
};

53
static const struct usb_device_id id_table[] = {
Linus Torvalds's avatar
Linus Torvalds committed
54
55
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
56
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
Linus Torvalds's avatar
Linus Torvalds committed
57
58
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
Max Arnold's avatar
Max Arnold committed
59
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
Steve Murphy's avatar
Steve Murphy committed
60
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
61
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
Linus Torvalds's avatar
Linus Torvalds committed
62
	{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
63
	{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
Linus Torvalds's avatar
Linus Torvalds committed
64
65
66
67
68
	{ 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) },
69
	{ USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
Linus Torvalds's avatar
Linus Torvalds committed
70
71
72
73
74
75
76
77
	{ 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) },
78
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
Linus Torvalds's avatar
Linus Torvalds committed
79
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
80
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
81
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
82
	{ USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
83
	{ USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
84
85
	{ USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
	{ USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
86
	{ USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
87
	{ USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
88
	{ USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
89
	{ USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
90
	{ USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
91
	{ USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
92
	{ USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
93
	{ USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
94
	{ USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
Matthew Arnold's avatar
Matthew Arnold committed
95
	{ USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
96
	{ USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
97
	{ USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
98
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
99
	{ USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
100
	{ USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
Linus Torvalds's avatar
Linus Torvalds committed
101
102
103
	{ }					/* Terminating entry */
};

104
MODULE_DEVICE_TABLE(usb, id_table);
Linus Torvalds's avatar
Linus Torvalds committed
105
106
107
108
109
110

static struct usb_driver pl2303_driver = {
	.name =		"pl2303",
	.probe =	usb_serial_probe,
	.disconnect =	usb_serial_disconnect,
	.id_table =	id_table,
111
112
	.suspend =      usb_serial_suspend,
	.resume =       usb_serial_resume,
113
	.no_dynamic_id = 	1,
114
	.supports_autosuspend =	1,
Linus Torvalds's avatar
Linus Torvalds committed
115
116
117
118
119
120
121
122
123
124
125
};

#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
Alan Cox's avatar
Alan Cox committed
126
#define BREAK_REQUEST			0x23
Linus Torvalds's avatar
Linus Torvalds committed
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
#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;
	enum pl2303_type type;
};

167
168
169
170
171
172
173
174
175
176
177
178
/*
 * 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;

179
	pb = kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
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
	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;

Alan Cox's avatar
Alan Cox committed
231
	return (pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size;
232
233
234
235
236
237
238
239
240
241
242
243
244
}

/*
 * 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;

Alan Cox's avatar
Alan Cox committed
245
	return (pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size;
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
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
}

/*
 * 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
325

326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
static int pl2303_vendor_read(__u16 value, __u16 index,
		struct usb_serial *serial, unsigned char *buf)
{
	int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
			VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
			value, index, buf, 1, 100);
	dbg("0x%x:0x%x:0x%x:0x%x  %d - %x", VENDOR_READ_REQUEST_TYPE,
			VENDOR_READ_REQUEST, value, index, res, buf[0]);
	return res;
}

static int pl2303_vendor_write(__u16 value, __u16 index,
		struct usb_serial *serial)
{
	int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
			VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
			value, index, NULL, 0, 100);
	dbg("0x%x:0x%x:0x%x:0x%x  %d", VENDOR_WRITE_REQUEST_TYPE,
			VENDOR_WRITE_REQUEST, value, index, res);
	return res;
}

348
static int pl2303_startup(struct usb_serial *serial)
Linus Torvalds's avatar
Linus Torvalds committed
349
350
351
{
	struct pl2303_private *priv;
	enum pl2303_type type = type_0;
352
	unsigned char *buf;
Linus Torvalds's avatar
Linus Torvalds committed
353
354
	int i;

355
356
357
358
	buf = kmalloc(10, GFP_KERNEL);
	if (buf == NULL)
		return -ENOMEM;

Linus Torvalds's avatar
Linus Torvalds committed
359
360
361
362
363
364
365
366
367
368
369
	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) {
370
		priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
371
372
373
374
375
376
377
378
379
380
381
382
		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);
	}
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399

	pl2303_vendor_read(0x8484, 0, serial, buf);
	pl2303_vendor_write(0x0404, 0, serial);
	pl2303_vendor_read(0x8484, 0, serial, buf);
	pl2303_vendor_read(0x8383, 0, serial, buf);
	pl2303_vendor_read(0x8484, 0, serial, buf);
	pl2303_vendor_write(0x0404, 1, serial);
	pl2303_vendor_read(0x8484, 0, serial, buf);
	pl2303_vendor_read(0x8383, 0, serial, buf);
	pl2303_vendor_write(0, 1, serial);
	pl2303_vendor_write(1, 0, serial);
	if (type == HX)
		pl2303_vendor_write(2, 0x44, serial);
	else
		pl2303_vendor_write(2, 0x24, serial);

	kfree(buf);
Linus Torvalds's avatar
Linus Torvalds committed
400
401
402
	return 0;

cleanup:
403
	kfree(buf);
Alan Cox's avatar
Alan Cox committed
404
	for (--i; i >= 0; --i) {
Linus Torvalds's avatar
Linus Torvalds committed
405
406
407
408
409
410
411
412
		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;
}

413
static int set_control_lines(struct usb_device *dev, u8 value)
Linus Torvalds's avatar
Linus Torvalds committed
414
415
{
	int retval;
Alan Cox's avatar
Alan Cox committed
416

417
418
419
	retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
				 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
				 value, 0, NULL, 0, 100);
420
	dbg("%s - value = %d, retval = %d", __func__, value, retval);
Linus Torvalds's avatar
Linus Torvalds committed
421
422
423
424
425
426
427
428
429
	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;

430
	dbg("%s - port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
431
432
433
434
435
436
437
438
439

	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,
440
			       port->bulk_out_size);
Linus Torvalds's avatar
Linus Torvalds committed
441
442
443
444
445
446
447
448
449
450

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

	priv->write_urb_in_use = 1;

	spin_unlock_irqrestore(&priv->lock, flags);

451
	usb_serial_debug_data(debug, &port->dev, __func__, count,
452
			      port->write_urb->transfer_buffer);
Linus Torvalds's avatar
Linus Torvalds committed
453
454

	port->write_urb->transfer_buffer_length = count;
455
	result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
Linus Torvalds's avatar
Linus Torvalds committed
456
	if (result) {
457
		dev_err(&port->dev, "%s - failed submitting write urb,"
458
			" error %d\n", __func__, result);
Linus Torvalds's avatar
Linus Torvalds committed
459
		priv->write_urb_in_use = 0;
Alan Cox's avatar
Alan Cox committed
460
		/* TODO: reschedule pl2303_send */
Linus Torvalds's avatar
Linus Torvalds committed
461
462
	}

463
	usb_serial_port_softint(port);
Linus Torvalds's avatar
Linus Torvalds committed
464
465
}

Alan Cox's avatar
Alan Cox committed
466
467
static int pl2303_write(struct tty_struct *tty, struct usb_serial_port *port,
				const unsigned char *buf, int count)
468
469
470
471
{
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;

472
	dbg("%s - port %d, %d bytes", __func__, port->number, count);
473
474
475
476
477
478
479
480
481
482
483
484
485

	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;
}

Alan Cox's avatar
Alan Cox committed
486
static int pl2303_write_room(struct tty_struct *tty)
Linus Torvalds's avatar
Linus Torvalds committed
487
{
Alan Cox's avatar
Alan Cox committed
488
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
489
490
491
492
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	int room = 0;
	unsigned long flags;

493
	dbg("%s - port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
494
495
496
497
498

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

499
	dbg("%s - returns %d", __func__, room);
Linus Torvalds's avatar
Linus Torvalds committed
500
501
502
	return room;
}

Alan Cox's avatar
Alan Cox committed
503
static int pl2303_chars_in_buffer(struct tty_struct *tty)
Linus Torvalds's avatar
Linus Torvalds committed
504
{
Alan Cox's avatar
Alan Cox committed
505
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
506
507
508
509
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	int chars = 0;
	unsigned long flags;

510
	dbg("%s - port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
511
512
513
514
515

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

516
	dbg("%s - returns %d", __func__, chars);
Linus Torvalds's avatar
Linus Torvalds committed
517
518
519
	return chars;
}

Alan Cox's avatar
Alan Cox committed
520
521
static void pl2303_set_termios(struct tty_struct *tty,
		struct usb_serial_port *port, struct ktermios *old_termios)
Linus Torvalds's avatar
Linus Torvalds committed
522
523
524
525
526
527
528
529
530
{
	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;
531
532
533
534
535
536
	const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
	                         4800, 7200, 9600, 14400, 19200, 28800, 38400,
	                         57600, 115200, 230400, 460800, 614400,
	                         921600, 1228800, 2457600, 3000000, 6000000 };
	int baud_floor, baud_ceil;
	int k;
Linus Torvalds's avatar
Linus Torvalds committed
537

538
	dbg("%s -  port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
539

540
541
542
543
	/* The PL2303 is reported to lose bytes if you change
	   serial settings even to the same values as before. Thus
	   we actually need to filter in this specific case */

Alan Cox's avatar
Alan Cox committed
544
	if (!tty_termios_hw_change(tty->termios, old_termios))
545
546
		return;

Alan Cox's avatar
Alan Cox committed
547
	cflag = tty->termios->c_cflag;
Linus Torvalds's avatar
Linus Torvalds committed
548

549
	buf = kzalloc(7, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
550
	if (!buf) {
551
		dev_err(&port->dev, "%s - out of memory.\n", __func__);
552
		/* Report back no change occurred */
Alan Cox's avatar
Alan Cox committed
553
		*tty->termios = *old_termios;
Linus Torvalds's avatar
Linus Torvalds committed
554
555
556
		return;
	}

557
558
559
560
561
	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
562
563
564

	if (cflag & CSIZE) {
		switch (cflag & CSIZE) {
Alan Cox's avatar
Alan Cox committed
565
566
567
568
569
570
571
572
573
574
575
576
577
		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;
Linus Torvalds's avatar
Linus Torvalds committed
578
		}
579
		dbg("%s - data bits = %d", __func__, buf[6]);
Linus Torvalds's avatar
Linus Torvalds committed
580
581
	}

582
583
584
585
586
	/* For reference buf[0]:buf[3] baud rate value */
	/* NOTE: Only the values defined in baud_sup are supported !
	 *       => if unsupported values are set, the PL2303 seems to use
	 *          9600 baud (at least my PL2303X always does)
	 */
Alan Cox's avatar
Alan Cox committed
587
	baud = tty_get_baud_rate(tty);
588
	dbg("%s - baud requested = %d", __func__, baud);
Linus Torvalds's avatar
Linus Torvalds committed
589
	if (baud) {
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
		/* Set baudrate to nearest supported value */
		for (k=0; k<ARRAY_SIZE(baud_sup); k++) {
			if (baud_sup[k] / baud) {
				baud_ceil = baud_sup[k];
				if (k==0) {
					baud = baud_ceil;
				} else {
					baud_floor = baud_sup[k-1];
					if ((baud_ceil % baud)
					    > (baud % baud_floor))
						baud = baud_floor;
					else
						baud = baud_ceil;
				}
				break;
			}
		}
		if (baud > 1228800) {
			/* type_0, type_1 only support up to 1228800 baud */
			if (priv->type != HX)
				baud = 1228800;
			else if (baud > 6000000)
				baud = 6000000;
		}
		dbg("%s - baud set = %d", __func__, baud);
Linus Torvalds's avatar
Linus Torvalds committed
615
616
617
618
619
620
621
622
623
624
		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) {
625
626
627
628
629
630
631
632
633
634
		/* NOTE: Comply with "real" UARTs / RS232:
		 *       use 1.5 instead of 2 stop bits with 5 data bits
		 */
		if ((cflag & CSIZE) == CS5) {
			buf[4] = 1;
			dbg("%s - stop bits = 1.5", __func__);
		} else {
			buf[4] = 2;
			dbg("%s - stop bits = 2", __func__);
		}
Linus Torvalds's avatar
Linus Torvalds committed
635
636
	} else {
		buf[4] = 0;
637
		dbg("%s - stop bits = 1", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
638
639
640
641
642
643
644
645
646
	}

	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) {
647
648
649
650
651
652
653
			if (cflag & CMSPAR) {
				buf[5] = 3;
				dbg("%s - parity = mark", __func__);
			} else {
				buf[5] = 1;
				dbg("%s - parity = odd", __func__);
			}
Linus Torvalds's avatar
Linus Torvalds committed
654
		} else {
655
656
657
658
659
660
661
			if (cflag & CMSPAR) {
				buf[5] = 4;
				dbg("%s - parity = space", __func__);
			} else {
				buf[5] = 2;
				dbg("%s - parity = even", __func__);
			}
Linus Torvalds's avatar
Linus Torvalds committed
662
663
664
		}
	} else {
		buf[5] = 0;
665
		dbg("%s - parity = none", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
666
667
	}

668
669
670
671
	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
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686

	/* 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);
	}
687

Linus Torvalds's avatar
Linus Torvalds committed
688
689
	buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;

690
691
692
693
	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
694
695
696
697
	     buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);

	if (cflag & CRTSCTS) {
		if (priv->type == HX)
698
			pl2303_vendor_write(0x0, 0x61, serial);
Linus Torvalds's avatar
Linus Torvalds committed
699
		else
700
			pl2303_vendor_write(0x0, 0x41, serial);
t.sefzick's avatar
t.sefzick committed
701
	} else {
702
		pl2303_vendor_write(0x0, 0x0, serial);
Linus Torvalds's avatar
Linus Torvalds committed
703
	}
704

705
	/* Save resulting baud rate */
706
	if (baud)
Alan Cox's avatar
Alan Cox committed
707
		tty_encode_baud_rate(tty, baud, baud);
708

709
710
711
	kfree(buf);
}

712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
{
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	u8 control;

	spin_lock_irqsave(&priv->lock, flags);
	/* Change DTR and RTS */
	if (on)
		priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
	else
		priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
	control = priv->line_control;
	spin_unlock_irqrestore(&priv->lock, flags);
	set_control_lines(port->serial->dev, control);
}

static void pl2303_close(struct usb_serial_port *port)
730
731
732
733
{
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;

734
	dbg("%s - port %d", __func__, port->number);
735
736
737
738
739
740
741

	spin_lock_irqsave(&priv->lock, flags);
	/* clear out any remaining data in the buffer */
	pl2303_buf_clear(priv->buf);
	spin_unlock_irqrestore(&priv->lock, flags);

	/* shutdown our urbs */
742
	dbg("%s - shutting down urbs", __func__);
743
744
745
746
	usb_kill_urb(port->write_urb);
	usb_kill_urb(port->read_urb);
	usb_kill_urb(port->interrupt_in_urb);

Linus Torvalds's avatar
Linus Torvalds committed
747
748
}

749
static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
Linus Torvalds's avatar
Linus Torvalds committed
750
{
Alan Cox's avatar
Alan Cox committed
751
	struct ktermios tmp_termios;
Linus Torvalds's avatar
Linus Torvalds committed
752
753
754
755
	struct usb_serial *serial = port->serial;
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	int result;

756
	dbg("%s -  port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
757

758
759
760
	if (priv->type != HX) {
		usb_clear_halt(serial->dev, port->write_urb->pipe);
		usb_clear_halt(serial->dev, port->read_urb->pipe);
761
	} else {
Linus Torvalds's avatar
Linus Torvalds committed
762
		/* reset upstream data pipes */
763
764
		pl2303_vendor_write(8, 0, serial);
		pl2303_vendor_write(9, 0, serial);
Linus Torvalds's avatar
Linus Torvalds committed
765
766
767
	}

	/* Setup termios */
Alan Cox's avatar
Alan Cox committed
768
769
	if (tty)
		pl2303_set_termios(tty, port, &tmp_termios);
Linus Torvalds's avatar
Linus Torvalds committed
770

771
	dbg("%s - submitting read urb", __func__);
772
	result = usb_submit_urb(port->read_urb, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
773
	if (result) {
774
		dev_err(&port->dev, "%s - failed submitting read urb,"
775
			" error %d\n", __func__, result);
776
		pl2303_close(port);
Linus Torvalds's avatar
Linus Torvalds committed
777
778
779
		return -EPROTO;
	}

780
	dbg("%s - submitting interrupt urb", __func__);
781
	result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
782
	if (result) {
783
		dev_err(&port->dev, "%s - failed submitting interrupt urb,"
784
			" error %d\n", __func__, result);
785
		pl2303_close(port);
Linus Torvalds's avatar
Linus Torvalds committed
786
787
		return -EPROTO;
	}
788
	port->port.drain_delay = 256;
Linus Torvalds's avatar
Linus Torvalds committed
789
790
791
	return 0;
}

Alan Cox's avatar
Alan Cox committed
792
static int pl2303_tiocmset(struct tty_struct *tty, struct file *file,
793
			   unsigned int set, unsigned int clear)
Linus Torvalds's avatar
Linus Torvalds committed
794
{
Alan Cox's avatar
Alan Cox committed
795
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
796
797
798
799
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	u8 control;

800
801
802
	if (!usb_get_intfdata(port->serial->interface))
		return -ENODEV;

803
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
804
805
806
807
808
809
810
811
812
	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;
813
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
814

815
	return set_control_lines(port->serial->dev, control);
Linus Torvalds's avatar
Linus Torvalds committed
816
817
}

Alan Cox's avatar
Alan Cox committed
818
static int pl2303_tiocmget(struct tty_struct *tty, struct file *file)
Linus Torvalds's avatar
Linus Torvalds committed
819
{
Alan Cox's avatar
Alan Cox committed
820
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
821
822
823
824
825
826
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int mcr;
	unsigned int status;
	unsigned int result;

827
	dbg("%s (%d)", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
828

829
830
831
	if (!usb_get_intfdata(port->serial->interface))
		return -ENODEV;

832
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
833
834
	mcr = priv->line_control;
	status = priv->line_status;
835
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
836
837
838
839
840
841
842
843

	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);

844
	dbg("%s - result = %x", __func__, result);
Linus Torvalds's avatar
Linus Torvalds committed
845
846
847
848

	return result;
}

849
850
851
852
853
854
855
856
static int pl2303_carrier_raised(struct usb_serial_port *port)
{
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	if (priv->line_status & UART_DCD)
		return 1;
	return 0;
}

Linus Torvalds's avatar
Linus Torvalds committed
857
858
859
860
861
862
863
864
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;

865
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
866
	prevstatus = priv->line_status;
867
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
868
869
870
871
872
873

	while (1) {
		interruptible_sleep_on(&priv->delta_msr_wait);
		/* see if a signal did it */
		if (signal_pending(current))
			return -ERESTARTSYS;
874
875

		spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
876
		status = priv->line_status;
877
878
		spin_unlock_irqrestore(&priv->lock, flags);

Alan Cox's avatar
Alan Cox committed
879
		changed = prevstatus ^ status;
880

Linus Torvalds's avatar
Linus Torvalds committed
881
882
883
		if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
		    ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
		    ((arg & TIOCM_CD)  && (changed & UART_DCD)) ||
Alan Cox's avatar
Alan Cox committed
884
		    ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
Linus Torvalds's avatar
Linus Torvalds committed
885
886
887
888
889
890
891
892
			return 0;
		}
		prevstatus = status;
	}
	/* NOTREACHED */
	return 0;
}

Alan Cox's avatar
Alan Cox committed
893
static int pl2303_ioctl(struct tty_struct *tty, struct file *file,
894
			unsigned int cmd, unsigned long arg)
Linus Torvalds's avatar
Linus Torvalds committed
895
{
896
	struct serial_struct ser;
Alan Cox's avatar
Alan Cox committed
897
	struct usb_serial_port *port = tty->driver_data;
898
	dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);
Linus Torvalds's avatar
Linus Torvalds committed
899
900

	switch (cmd) {
901
902
903
904
905
906
907
908
909
910
911
912
	case TIOCGSERIAL:
		memset(&ser, 0, sizeof ser);
		ser.type = PORT_16654;
		ser.line = port->serial->minor;
		ser.port = port->number;
		ser.baud_base = 460800;

		if (copy_to_user((void __user *)arg, &ser, sizeof ser))
			return -EFAULT;

		return 0;

Alan Cox's avatar
Alan Cox committed
913
914
915
916
917
918
	case TIOCMIWAIT:
		dbg("%s (%d) TIOCMIWAIT", __func__,  port->number);
		return wait_modem_info(port, arg);
	default:
		dbg("%s not supported = 0x%04x", __func__, cmd);
		break;
Linus Torvalds's avatar
Linus Torvalds committed
919
920
921
922
	}
	return -ENOIOCTLCMD;
}

Alan Cox's avatar
Alan Cox committed
923
static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
Linus Torvalds's avatar
Linus Torvalds committed
924
{
Alan Cox's avatar
Alan Cox committed
925
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
926
927
928
929
	struct usb_serial *serial = port->serial;
	u16 state;
	int result;

930
	dbg("%s - port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
931
932
933
934
935

	if (break_state == 0)
		state = BREAK_OFF;
	else
		state = BREAK_ON;
Alan Cox's avatar
Alan Cox committed
936
937
	dbg("%s - turning break %s", __func__,
			state == BREAK_OFF ? "off" : "on");
Linus Torvalds's avatar
Linus Torvalds committed
938

939
940
941
	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
942
	if (result)
943
		dbg("%s - error sending break = %d", __func__, result);
Linus Torvalds's avatar
Linus Torvalds committed
944
945
}

946
static void pl2303_release(struct usb_serial *serial)
Linus Torvalds's avatar
Linus Torvalds committed
947
948
949
950
{
	int i;
	struct pl2303_private *priv;

951
	dbg("%s", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
952
953
954
955
956
957
958

	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);
		}
959
	}
Linus Torvalds's avatar
Linus Torvalds committed
960
961
}

Flavio Leitner's avatar
Flavio Leitner committed
962
963
964
965
966
967
968
969
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;
970
	u8 length = UART_STATE + 1;
971
	u16 idv, idp;
Flavio Leitner's avatar
Flavio Leitner committed
972

973
974
975
976
977
978
979
980
981
982
983
984
	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
985
986
987
	}

	if (actual_length < length)
988
		return;
Flavio Leitner's avatar
Flavio Leitner committed
989

Alan Cox's avatar
Alan Cox committed
990
	/* Save off the uart status for others to look at */
Flavio Leitner's avatar
Flavio Leitner committed
991
992
993
	spin_lock_irqsave(&priv->lock, flags);
	priv->line_status = data[status_idx];
	spin_unlock_irqrestore(&priv->lock, flags);
994
995
	if (priv->line_status & UART_BREAK_ERROR)
		usb_serial_handle_break(port);
996
	wake_up_interruptible(&priv->delta_msr_wait);
Flavio Leitner's avatar
Flavio Leitner committed
997
}
Linus Torvalds's avatar
Linus Torvalds committed
998

999
static void pl2303_read_int_callback(struct urb *urb)
Linus Torvalds's avatar
Linus Torvalds committed
1000
{
For faster browsing, not all history is shown. View entire blame