pl2303.c 30.2 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
53
54
55
#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) },
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) },
Linus Torvalds's avatar
Linus Torvalds committed
99
100
101
	{ }					/* Terminating entry */
};

102
MODULE_DEVICE_TABLE(usb, id_table);
Linus Torvalds's avatar
Linus Torvalds committed
103
104
105
106
107
108

static struct usb_driver pl2303_driver = {
	.name =		"pl2303",
	.probe =	usb_serial_probe,
	.disconnect =	usb_serial_disconnect,
	.id_table =	id_table,
109
110
	.suspend =      usb_serial_suspend,
	.resume =       usb_serial_resume,
111
	.no_dynamic_id = 	1,
112
	.supports_autosuspend =	1,
Linus Torvalds's avatar
Linus Torvalds committed
113
114
115
116
117
118
119
120
121
122
123
};

#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
124
#define BREAK_REQUEST			0x23
Linus Torvalds's avatar
Linus Torvalds committed
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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
#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;
};

165
166
167
168
169
170
171
172
173
174
175
176
/*
 * 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;

177
	pb = kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
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
	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
229
	return (pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size;
230
231
232
233
234
235
236
237
238
239
240
241
242
}

/*
 * 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
243
	return (pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size;
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
309
310
311
312
313
314
315
316
317
318
319
320
321
322
}

/*
 * 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
323

324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
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;
}

346
static int pl2303_startup(struct usb_serial *serial)
Linus Torvalds's avatar
Linus Torvalds committed
347
348
349
{
	struct pl2303_private *priv;
	enum pl2303_type type = type_0;
350
	unsigned char *buf;
Linus Torvalds's avatar
Linus Torvalds committed
351
352
	int i;

353
354
355
356
	buf = kmalloc(10, GFP_KERNEL);
	if (buf == NULL)
		return -ENOMEM;

Linus Torvalds's avatar
Linus Torvalds committed
357
358
359
360
361
362
363
364
365
366
367
	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) {
368
		priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
369
370
371
372
373
374
375
376
377
378
379
380
		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);
	}
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397

	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
398
399
400
	return 0;

cleanup:
401
	kfree(buf);
Alan Cox's avatar
Alan Cox committed
402
	for (--i; i >= 0; --i) {
Linus Torvalds's avatar
Linus Torvalds committed
403
404
405
406
407
408
409
410
		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;
}

411
static int set_control_lines(struct usb_device *dev, u8 value)
Linus Torvalds's avatar
Linus Torvalds committed
412
413
{
	int retval;
Alan Cox's avatar
Alan Cox committed
414

415
416
417
	retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
				 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
				 value, 0, NULL, 0, 100);
418
	dbg("%s - value = %d, retval = %d", __func__, value, retval);
Linus Torvalds's avatar
Linus Torvalds committed
419
420
421
422
423
424
425
426
427
	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;

428
	dbg("%s - port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
429
430
431
432
433
434
435
436
437

	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,
438
			       port->bulk_out_size);
Linus Torvalds's avatar
Linus Torvalds committed
439
440
441
442
443
444
445
446
447
448

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

	priv->write_urb_in_use = 1;

	spin_unlock_irqrestore(&priv->lock, flags);

449
	usb_serial_debug_data(debug, &port->dev, __func__, count,
450
			      port->write_urb->transfer_buffer);
Linus Torvalds's avatar
Linus Torvalds committed
451
452
453

	port->write_urb->transfer_buffer_length = count;
	port->write_urb->dev = port->serial->dev;
454
	result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
Linus Torvalds's avatar
Linus Torvalds committed
455
	if (result) {
456
		dev_err(&port->dev, "%s - failed submitting write urb,"
457
			" error %d\n", __func__, result);
Linus Torvalds's avatar
Linus Torvalds committed
458
		priv->write_urb_in_use = 0;
Alan Cox's avatar
Alan Cox committed
459
		/* TODO: reschedule pl2303_send */
Linus Torvalds's avatar
Linus Torvalds committed
460
461
	}

462
	usb_serial_port_softint(port);
Linus Torvalds's avatar
Linus Torvalds committed
463
464
}

Alan Cox's avatar
Alan Cox committed
465
466
static int pl2303_write(struct tty_struct *tty, struct usb_serial_port *port,
				const unsigned char *buf, int count)
467
468
469
470
{
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;

471
	dbg("%s - port %d, %d bytes", __func__, port->number, count);
472
473
474
475
476
477
478
479
480
481
482
483
484

	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
485
static int pl2303_write_room(struct tty_struct *tty)
Linus Torvalds's avatar
Linus Torvalds committed
486
{
Alan Cox's avatar
Alan Cox committed
487
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
488
489
490
491
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	int room = 0;
	unsigned long flags;

492
	dbg("%s - port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
493
494
495
496
497

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

498
	dbg("%s - returns %d", __func__, room);
Linus Torvalds's avatar
Linus Torvalds committed
499
500
501
	return room;
}

Alan Cox's avatar
Alan Cox committed
502
static int pl2303_chars_in_buffer(struct tty_struct *tty)
Linus Torvalds's avatar
Linus Torvalds committed
503
{
Alan Cox's avatar
Alan Cox committed
504
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
505
506
507
508
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	int chars = 0;
	unsigned long flags;

509
	dbg("%s - port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
510
511
512
513
514

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

515
	dbg("%s - returns %d", __func__, chars);
Linus Torvalds's avatar
Linus Torvalds committed
516
517
518
	return chars;
}

Alan Cox's avatar
Alan Cox committed
519
520
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
521
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
	dbg("%s -  port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
532

533
534
535
536
	/* 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
537
	if (!tty_termios_hw_change(tty->termios, old_termios))
538
539
		return;

Alan Cox's avatar
Alan Cox committed
540
	cflag = tty->termios->c_cflag;
Linus Torvalds's avatar
Linus Torvalds committed
541

542
	buf = kzalloc(7, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
543
	if (!buf) {
544
		dev_err(&port->dev, "%s - out of memory.\n", __func__);
545
		/* Report back no change occurred */
Alan Cox's avatar
Alan Cox committed
546
		*tty->termios = *old_termios;
Linus Torvalds's avatar
Linus Torvalds committed
547
548
549
		return;
	}

550
551
552
553
554
	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
555
556
557

	if (cflag & CSIZE) {
		switch (cflag & CSIZE) {
Alan Cox's avatar
Alan Cox committed
558
559
560
561
562
563
564
565
566
567
568
569
570
		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
571
		}
572
		dbg("%s - data bits = %d", __func__, buf[6]);
Linus Torvalds's avatar
Linus Torvalds committed
573
574
	}

Alan Cox's avatar
Alan Cox committed
575
	baud = tty_get_baud_rate(tty);
576
	dbg("%s - baud = %d", __func__, baud);
Linus Torvalds's avatar
Linus Torvalds committed
577
578
579
580
581
582
583
584
585
586
587
588
	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;
589
		dbg("%s - stop bits = 2", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
590
591
	} else {
		buf[4] = 0;
592
		dbg("%s - stop bits = 1", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
593
594
595
596
597
598
599
600
601
602
	}

	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;
603
			dbg("%s - parity = odd", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
604
605
		} else {
			buf[5] = 2;
606
			dbg("%s - parity = even", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
607
608
609
		}
	} else {
		buf[5] = 0;
610
		dbg("%s - parity = none", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
611
612
	}

613
614
615
616
	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
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631

	/* 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);
	}
632

Linus Torvalds's avatar
Linus Torvalds committed
633
634
	buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;

635
636
637
638
	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
639
640
641
642
	     buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);

	if (cflag & CRTSCTS) {
		if (priv->type == HX)
643
			pl2303_vendor_write(0x0, 0x61, serial);
Linus Torvalds's avatar
Linus Torvalds committed
644
		else
645
			pl2303_vendor_write(0x0, 0x41, serial);
t.sefzick's avatar
t.sefzick committed
646
	} else {
647
		pl2303_vendor_write(0x0, 0x0, serial);
Linus Torvalds's avatar
Linus Torvalds committed
648
	}
649

650
651
	/* FIXME: Need to read back resulting baud rate */
	if (baud)
Alan Cox's avatar
Alan Cox committed
652
		tty_encode_baud_rate(tty, baud, baud);
653

654
655
656
	kfree(buf);
}

657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
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)
675
676
677
678
{
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;

679
	dbg("%s - port %d", __func__, port->number);
680
681
682
683
684
685
686

	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 */
687
	dbg("%s - shutting down urbs", __func__);
688
689
690
691
	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
692
693
}

Alan Cox's avatar
Alan Cox committed
694
695
static int pl2303_open(struct tty_struct *tty,
			struct usb_serial_port *port, struct file *filp)
Linus Torvalds's avatar
Linus Torvalds committed
696
{
Alan Cox's avatar
Alan Cox committed
697
	struct ktermios tmp_termios;
Linus Torvalds's avatar
Linus Torvalds committed
698
699
700
701
	struct usb_serial *serial = port->serial;
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	int result;

702
	dbg("%s -  port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
703

704
705
706
	if (priv->type != HX) {
		usb_clear_halt(serial->dev, port->write_urb->pipe);
		usb_clear_halt(serial->dev, port->read_urb->pipe);
707
	} else {
Linus Torvalds's avatar
Linus Torvalds committed
708
		/* reset upstream data pipes */
709
710
		pl2303_vendor_write(8, 0, serial);
		pl2303_vendor_write(9, 0, serial);
Linus Torvalds's avatar
Linus Torvalds committed
711
712
713
	}

	/* Setup termios */
Alan Cox's avatar
Alan Cox committed
714
715
	if (tty)
		pl2303_set_termios(tty, port, &tmp_termios);
Linus Torvalds's avatar
Linus Torvalds committed
716

Alan Cox's avatar
Alan Cox committed
717
	/* FIXME: need to assert RTS and DTR if CRTSCTS off */
Linus Torvalds's avatar
Linus Torvalds committed
718

719
	dbg("%s - submitting read urb", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
720
	port->read_urb->dev = serial->dev;
721
	result = usb_submit_urb(port->read_urb, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
722
	if (result) {
723
		dev_err(&port->dev, "%s - failed submitting read urb,"
724
			" error %d\n", __func__, result);
725
		pl2303_close(port);
Linus Torvalds's avatar
Linus Torvalds committed
726
727
728
		return -EPROTO;
	}

729
	dbg("%s - submitting interrupt urb", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
730
	port->interrupt_in_urb->dev = serial->dev;
731
	result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
732
	if (result) {
733
		dev_err(&port->dev, "%s - failed submitting interrupt urb,"
734
			" error %d\n", __func__, result);
735
		pl2303_close(port);
Linus Torvalds's avatar
Linus Torvalds committed
736
737
		return -EPROTO;
	}
738
	port->port.drain_delay = 256;
Linus Torvalds's avatar
Linus Torvalds committed
739
740
741
	return 0;
}

Alan Cox's avatar
Alan Cox committed
742
static int pl2303_tiocmset(struct tty_struct *tty, struct file *file,
743
			   unsigned int set, unsigned int clear)
Linus Torvalds's avatar
Linus Torvalds committed
744
{
Alan Cox's avatar
Alan Cox committed
745
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
746
747
748
749
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	u8 control;

750
751
752
	if (!usb_get_intfdata(port->serial->interface))
		return -ENODEV;

753
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
754
755
756
757
758
759
760
761
762
	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;
763
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
764

765
	return set_control_lines(port->serial->dev, control);
Linus Torvalds's avatar
Linus Torvalds committed
766
767
}

Alan Cox's avatar
Alan Cox committed
768
static int pl2303_tiocmget(struct tty_struct *tty, struct file *file)
Linus Torvalds's avatar
Linus Torvalds committed
769
{
Alan Cox's avatar
Alan Cox committed
770
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
771
772
773
774
775
776
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int mcr;
	unsigned int status;
	unsigned int result;

777
	dbg("%s (%d)", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
778

779
780
781
	if (!usb_get_intfdata(port->serial->interface))
		return -ENODEV;

782
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
783
784
	mcr = priv->line_control;
	status = priv->line_status;
785
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
786
787
788
789
790
791
792
793

	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);

794
	dbg("%s - result = %x", __func__, result);
Linus Torvalds's avatar
Linus Torvalds committed
795
796
797
798

	return result;
}

799
800
801
802
803
804
805
806
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
807
808
809
810
811
812
813
814
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;

815
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
816
	prevstatus = priv->line_status;
817
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
818
819
820
821
822
823

	while (1) {
		interruptible_sleep_on(&priv->delta_msr_wait);
		/* see if a signal did it */
		if (signal_pending(current))
			return -ERESTARTSYS;
824
825

		spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
826
		status = priv->line_status;
827
828
		spin_unlock_irqrestore(&priv->lock, flags);

Alan Cox's avatar
Alan Cox committed
829
		changed = prevstatus ^ status;
830

Linus Torvalds's avatar
Linus Torvalds committed
831
832
833
		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
834
		    ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
Linus Torvalds's avatar
Linus Torvalds committed
835
836
837
838
839
840
841
842
			return 0;
		}
		prevstatus = status;
	}
	/* NOTREACHED */
	return 0;
}

Alan Cox's avatar
Alan Cox committed
843
static int pl2303_ioctl(struct tty_struct *tty, struct file *file,
844
			unsigned int cmd, unsigned long arg)
Linus Torvalds's avatar
Linus Torvalds committed
845
{
Alan Cox's avatar
Alan Cox committed
846
	struct usb_serial_port *port = tty->driver_data;
847
	dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);
Linus Torvalds's avatar
Linus Torvalds committed
848
849

	switch (cmd) {
Alan Cox's avatar
Alan Cox committed
850
851
852
853
854
855
	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
856
857
858
859
	}
	return -ENOIOCTLCMD;
}

Alan Cox's avatar
Alan Cox committed
860
static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
Linus Torvalds's avatar
Linus Torvalds committed
861
{
Alan Cox's avatar
Alan Cox committed
862
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
863
864
865
866
	struct usb_serial *serial = port->serial;
	u16 state;
	int result;

867
	dbg("%s - port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
868
869
870
871
872

	if (break_state == 0)
		state = BREAK_OFF;
	else
		state = BREAK_ON;
Alan Cox's avatar
Alan Cox committed
873
874
	dbg("%s - turning break %s", __func__,
			state == BREAK_OFF ? "off" : "on");
Linus Torvalds's avatar
Linus Torvalds committed
875

876
877
878
	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
879
	if (result)
880
		dbg("%s - error sending break = %d", __func__, result);
Linus Torvalds's avatar
Linus Torvalds committed
881
882
}

883
static void pl2303_release(struct usb_serial *serial)
Linus Torvalds's avatar
Linus Torvalds committed
884
885
886
887
{
	int i;
	struct pl2303_private *priv;

888
	dbg("%s", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
889
890
891
892
893
894
895

	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);
		}
896
	}
Linus Torvalds's avatar
Linus Torvalds committed
897
898
}

Flavio Leitner's avatar
Flavio Leitner committed
899
900
901
902
903
904
905
906
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;
907
	u8 length = UART_STATE + 1;
908
	u16 idv, idp;
Flavio Leitner's avatar
Flavio Leitner committed
909

910
911
912
913
914
915
916
917
918
919
920
921
	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
922
923
924
	}

	if (actual_length < length)
925
		return;
Flavio Leitner's avatar
Flavio Leitner committed
926

Alan Cox's avatar
Alan Cox committed
927
	/* Save off the uart status for others to look at */
Flavio Leitner's avatar
Flavio Leitner committed
928
929
930
	spin_lock_irqsave(&priv->lock, flags);
	priv->line_status = data[status_idx];
	spin_unlock_irqrestore(&priv->lock, flags);
931
932
	if (priv->line_status & UART_BREAK_ERROR)
		usb_serial_handle_break(port);
933
	wake_up_interruptible(&priv->delta_msr_wait);
Flavio Leitner's avatar
Flavio Leitner committed
934
}
Linus Torvalds's avatar
Linus Torvalds committed
935

936
static void pl2303_read_int_callback(struct urb *urb)
Linus Torvalds's avatar
Linus Torvalds committed
937
{
938
	struct usb_serial_port *port =  urb->context;
Linus Torvalds's avatar
Linus Torvalds committed
939
	unsigned char *data = urb->transfer_buffer;
Flavio Leitner's avatar
Flavio Leitner committed
940
	unsigned int actual_length = urb->actual_length;
941
942
	int status = urb->status;
	int retval;
Linus Torvalds's avatar
Linus Torvalds committed
943

944
	dbg("%s (%d)", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
945

946
	switch (status) {
Linus Torvalds's avatar
Linus Torvalds committed
947
948
949
950
951
952
953
	case 0:
		/* success */
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
954
		dbg("%s - urb shutting down with status: %d", __func__,
955
		    status);
Linus Torvalds's avatar
Linus Torvalds committed
956
957
		return;
	default:
958
		dbg("%s - nonzero urb status received: %d", __func__,
959
		    status);
Linus Torvalds's avatar
Linus Torvalds committed
960
961
962
		goto exit;
	}

963
	usb_serial_debug_data(debug, &port->dev, __func__,
964
965
			      urb->actual_length, urb->transfer_buffer);

Flavio Leitner's avatar
Flavio Leitner committed
966
	pl2303_update_line_status(port, data, actual_length);
Linus Torvalds's avatar
Linus Torvalds committed
967
968

exit:
969
970
	retval = usb_submit_urb(urb, GFP_ATOMIC);
	if (retval)
971
972
		dev_err(&urb->dev->dev,
			"%s - usb_submit_urb failed with result %d\n",
973
			__func__, retval);
Linus Torvalds's avatar
Linus Torvalds committed
974
975
}

976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
static void pl2303_push_data(struct tty_struct *tty,
		struct usb_serial_port *port, struct urb *urb,
		u8 line_status)
{
	unsigned char *data = urb->transfer_buffer;
	/* get tty_flag from status */
	char tty_flag = TTY_NORMAL;
	/* break takes precedence over parity, */
	/* which takes precedence over framing errors */
	if (line_status & UART_BREAK_ERROR)
		tty_flag = TTY_BREAK;
	else if (line_status & UART_PARITY_ERROR)
		tty_flag = TTY_PARITY;
	else if (line_status & UART_FRAME_ERROR)
		tty_flag = TTY_FRAME;
	dbg("%s - tty_flag = %d", __func__, tty_flag);

	tty_buffer_request_room(tty, urb->actual_length + 1);
	/* overrun is special, not associated with a char */
	if (line_status & UART_OVERRUN_ERROR)
		tty_insert_flip_char(tty, 0, TTY_OVERRUN);
	if (port->console && port->sysrq) {
		int i;
		for (i = 0; i < urb->actual_length; ++i)
			if (!usb_serial_handle_sysrq_char(tty, port, data[i]))
For faster browsing, not all history is shown. View entire blame