pl2303.c 23.4 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
 */

#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
28
#include <linux/uaccess.h>
Linus Torvalds's avatar
Linus Torvalds committed
29
#include <linux/usb.h>
30
#include <linux/usb/serial.h>
31
#include <asm/unaligned.h>
Linus Torvalds's avatar
Linus Torvalds committed
32
33
#include "pl2303.h"

34
static const struct usb_device_id id_table[] = {
Linus Torvalds's avatar
Linus Torvalds committed
35
36
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
37
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
Linus Torvalds's avatar
Linus Torvalds committed
38
39
	{ 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
40
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
Steve Murphy's avatar
Steve Murphy committed
41
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
42
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
43
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
44
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },
Linus Torvalds's avatar
Linus Torvalds committed
45
	{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
46
	{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
Linus Torvalds's avatar
Linus Torvalds committed
47
48
49
50
51
	{ 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) },
52
	{ USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
Linus Torvalds's avatar
Linus Torvalds committed
53
54
55
56
57
58
59
60
	{ 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) },
61
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
Linus Torvalds's avatar
Linus Torvalds committed
62
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
63
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
64
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
65
	{ USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
66
	{ USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
67
68
	{ USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
	{ USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
69
	{ USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
70
	{ USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
71
	{ USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
72
	{ USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
73
	{ USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
74
	{ USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
75
	{ USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
76
	{ USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
77
	{ USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
Matthew Arnold's avatar
Matthew Arnold committed
78
	{ USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
79
	{ USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
80
	{ USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
81
	{ USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
82
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
83
	{ USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
84
	{ USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
85
	{ USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
Linus Torvalds's avatar
Linus Torvalds committed
86
87
88
	{ }					/* Terminating entry */
};

89
MODULE_DEVICE_TABLE(usb, id_table);
Linus Torvalds's avatar
Linus Torvalds committed
90
91
92
93
94
95
96
97
98
99

#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
100
#define BREAK_REQUEST			0x23
Linus Torvalds's avatar
Linus Torvalds committed
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
#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 {
126
127
128
	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 */
Linus Torvalds's avatar
Linus Torvalds committed
129
130
};

131
132
133
134
struct pl2303_serial_private {
	enum pl2303_type type;
};

Linus Torvalds's avatar
Linus Torvalds committed
135
136
137
138
struct pl2303_private {
	spinlock_t lock;
	u8 line_control;
	u8 line_status;
139
140

	u8 line_settings[7];
Linus Torvalds's avatar
Linus Torvalds committed
141
142
};

143
144
static int pl2303_vendor_read(struct usb_serial *serial, u16 value,
							unsigned char buf[1])
145
{
146
	struct device *dev = &serial->interface->dev;
147
148
149
	int res;

	res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
150
			VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
151
152
153
154
155
156
157
158
159
			value, 0, buf, 1, 100);
	if (res != 1) {
		dev_err(dev, "%s - failed to read [%04x]: %d\n", __func__,
								value, res);
		if (res >= 0)
			res = -EIO;

		return res;
	}
160

161
	dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, buf[0]);
162

163
	return 0;
164
165
}

166
static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index)
167
{
168
	struct device *dev = &serial->interface->dev;
169
170
	int res;

171
172
	dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, index);

173
	res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
174
175
			VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
			value, index, NULL, 0, 100);
176
177
178
179
180
	if (res) {
		dev_err(dev, "%s - failed to write [%04x]: %d\n", __func__,
								value, res);
		return res;
	}
181

182
	return 0;
183
184
}

185
static int pl2303_startup(struct usb_serial *serial)
Linus Torvalds's avatar
Linus Torvalds committed
186
{
187
	struct pl2303_serial_private *spriv;
Linus Torvalds's avatar
Linus Torvalds committed
188
	enum pl2303_type type = type_0;
189
	unsigned char *buf;
190
191
192
193

	spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
	if (!spriv)
		return -ENOMEM;
Linus Torvalds's avatar
Linus Torvalds committed
194

195
	buf = kmalloc(1, GFP_KERNEL);
196
197
	if (!buf) {
		kfree(spriv);
198
		return -ENOMEM;
199
	}
200

201
	if (serial->dev->descriptor.bDeviceClass == 0x02)
Linus Torvalds's avatar
Linus Torvalds committed
202
		type = type_0;
203
	else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
204
		type = HX;
205
206
207
	else if (serial->dev->descriptor.bDeviceClass == 0x00)
		type = type_1;
	else if (serial->dev->descriptor.bDeviceClass == 0xFF)
Linus Torvalds's avatar
Linus Torvalds committed
208
		type = type_1;
209
	dev_dbg(&serial->interface->dev, "device type: %d\n", type);
Linus Torvalds's avatar
Linus Torvalds committed
210

211
212
	spriv->type = type;
	usb_set_serial_data(serial, spriv);
213

214
215
216
217
218
219
220
221
222
223
	pl2303_vendor_read(serial, 0x8484, buf);
	pl2303_vendor_write(serial, 0x0404, 0);
	pl2303_vendor_read(serial, 0x8484, buf);
	pl2303_vendor_read(serial, 0x8383, buf);
	pl2303_vendor_read(serial, 0x8484, buf);
	pl2303_vendor_write(serial, 0x0404, 1);
	pl2303_vendor_read(serial, 0x8484, buf);
	pl2303_vendor_read(serial, 0x8383, buf);
	pl2303_vendor_write(serial, 0, 1);
	pl2303_vendor_write(serial, 1, 0);
224
	if (type == HX)
225
		pl2303_vendor_write(serial, 2, 0x44);
226
	else
227
		pl2303_vendor_write(serial, 2, 0x24);
228
229

	kfree(buf);
230

Linus Torvalds's avatar
Linus Torvalds committed
231
	return 0;
232
}
Linus Torvalds's avatar
Linus Torvalds committed
233

234
235
static void pl2303_release(struct usb_serial *serial)
{
236
	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252

	kfree(spriv);
}

static int pl2303_port_probe(struct usb_serial_port *port)
{
	struct pl2303_private *priv;

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	spin_lock_init(&priv->lock);

	usb_set_serial_port_data(port, priv);

253
254
	port->port.drain_delay = 256;

255
256
257
258
259
	return 0;
}

static int pl2303_port_remove(struct usb_serial_port *port)
{
260
	struct pl2303_private *priv = usb_get_serial_port_data(port);
261
262
263
264

	kfree(priv);

	return 0;
Linus Torvalds's avatar
Linus Torvalds committed
265
266
}

267
static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
Linus Torvalds's avatar
Linus Torvalds committed
268
{
269
	struct usb_device *dev = port->serial->dev;
Linus Torvalds's avatar
Linus Torvalds committed
270
	int retval;
Alan Cox's avatar
Alan Cox committed
271

272
273
274
	retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
				 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
				 value, 0, NULL, 0, 100);
275

276
	dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__,
277
		value, retval);
278

Linus Torvalds's avatar
Linus Torvalds committed
279
280
281
	return retval;
}

282
283
284
static void pl2303_encode_baudrate(struct tty_struct *tty,
					struct usb_serial_port *port,
					u8 buf[4])
Linus Torvalds's avatar
Linus Torvalds committed
285
{
286
287
288
289
290
	const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
	                         4800, 7200, 9600, 14400, 19200, 28800, 38400,
	                         57600, 115200, 230400, 460800, 500000, 614400,
	                         921600, 1228800, 2457600, 3000000, 6000000 };

291
292
	struct usb_serial *serial = port->serial;
	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
293
	int baud;
294
	int i;
Linus Torvalds's avatar
Linus Torvalds committed
295

296
297
298
299
300
	/*
	 * 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
301
	baud = tty_get_baud_rate(tty);
302
	dev_dbg(&port->dev, "baud requested = %d\n", baud);
303
304
	if (!baud)
		return;
305

306
307
308
309
310
	/* Set baudrate to nearest supported value */
	for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) {
		if (baud_sup[i] > baud)
			break;
	}
311

312
313
314
315
316
317
	if (i == ARRAY_SIZE(baud_sup))
		baud = baud_sup[i - 1];
	else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1]))
		baud = baud_sup[i - 1];
	else
		baud = baud_sup[i];
318

319
320
321
	/* type_0, type_1 only support up to 1228800 baud */
	if (spriv->type != HX)
		baud = min_t(int, baud, 1228800);
322

323
	if (baud <= 115200) {
324
325
326
		put_unaligned_le32(baud, buf);
	} else {
		/*
327
328
		 * Apparently the formula for higher speeds is:
		 * baudrate = 12M * 32 / (2^buf[1]) / buf[0]
329
		 */
330
331
		unsigned tmp = 12000000 * 32 / baud;
		buf[3] = 0x80;
332
		buf[2] = 0;
333
334
335
336
337
338
		buf[1] = (tmp >= 256);
		while (tmp >= 256) {
			tmp >>= 2;
			buf[1] <<= 1;
		}
		buf[0] = tmp;
339
340
	}

341
	/* Save resulting baud rate */
342
343
	tty_encode_baud_rate(tty, baud, baud);
	dev_dbg(&port->dev, "baud set = %d\n", baud);
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
}

static void pl2303_set_termios(struct tty_struct *tty,
		struct usb_serial_port *port, struct ktermios *old_termios)
{
	struct usb_serial *serial = port->serial;
	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned char *buf;
	int i;
	u8 control;

	if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
		return;

	buf = kzalloc(7, GFP_KERNEL);
	if (!buf) {
		/* Report back no change occurred */
		if (old_termios)
			tty->termios = *old_termios;
		return;
	}

	i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
			    GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
	dev_dbg(&port->dev, "0xa1:0x21:0:0  %d - %7ph\n", i, buf);

373
374
375
376
377
378
379
380
381
382
383
384
385
	switch (C_CSIZE(tty)) {
	case CS5:
		buf[6] = 5;
		break;
	case CS6:
		buf[6] = 6;
		break;
	case CS7:
		buf[6] = 7;
		break;
	default:
	case CS8:
		buf[6] = 8;
386
	}
387
	dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
388

389
390
	/* For reference buf[0]:buf[3] baud rate value */
	pl2303_encode_baudrate(tty, port, &buf[0]);
391

Linus Torvalds's avatar
Linus Torvalds committed
392
393
394
	/* 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 */
395
396
397
	if (C_CSTOPB(tty)) {
		/*
		 * NOTE: Comply with "real" UARTs / RS232:
398
399
		 *       use 1.5 instead of 2 stop bits with 5 data bits
		 */
400
		if (C_CSIZE(tty) == CS5) {
401
			buf[4] = 1;
402
			dev_dbg(&port->dev, "stop bits = 1.5\n");
403
404
		} else {
			buf[4] = 2;
405
			dev_dbg(&port->dev, "stop bits = 2\n");
406
		}
Linus Torvalds's avatar
Linus Torvalds committed
407
408
	} else {
		buf[4] = 0;
409
		dev_dbg(&port->dev, "stop bits = 1\n");
Linus Torvalds's avatar
Linus Torvalds committed
410
411
	}

412
	if (C_PARENB(tty)) {
Linus Torvalds's avatar
Linus Torvalds committed
413
414
415
416
417
		/* 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 */
418
419
		if (C_PARODD(tty)) {
			if (tty->termios.c_cflag & CMSPAR) {
420
				buf[5] = 3;
421
				dev_dbg(&port->dev, "parity = mark\n");
422
423
			} else {
				buf[5] = 1;
424
				dev_dbg(&port->dev, "parity = odd\n");
425
			}
Linus Torvalds's avatar
Linus Torvalds committed
426
		} else {
427
			if (tty->termios.c_cflag & CMSPAR) {
428
				buf[5] = 4;
429
				dev_dbg(&port->dev, "parity = space\n");
430
431
			} else {
				buf[5] = 2;
432
				dev_dbg(&port->dev, "parity = even\n");
433
			}
Linus Torvalds's avatar
Linus Torvalds committed
434
435
436
		}
	} else {
		buf[5] = 0;
437
		dev_dbg(&port->dev, "parity = none\n");
Linus Torvalds's avatar
Linus Torvalds committed
438
439
	}

440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
	/*
	 * Some PL2303 are known 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.
	 *
	 * Note that the tty_termios_hw_change check above is not sufficient
	 * as a previously requested baud rate may differ from the one
	 * actually used (and stored in old_termios).
	 *
	 * NOTE: No additional locking needed for line_settings as it is
	 *       only used in set_termios, which is serialised against itself.
	 */
	if (!old_termios || memcmp(buf, priv->line_settings, 7)) {
		i = usb_control_msg(serial->dev,
				    usb_sndctrlpipe(serial->dev, 0),
				    SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
				    0, 0, buf, 7, 100);

		dev_dbg(&port->dev, "0x21:0x20:0:0  %d\n", i);

		if (i == 7)
			memcpy(priv->line_settings, buf, 7);
	}
Linus Torvalds's avatar
Linus Torvalds committed
463
464
465
466

	/* change control lines if we are switching to or from B0 */
	spin_lock_irqsave(&priv->lock, flags);
	control = priv->line_control;
467
	if (C_BAUD(tty) == B0)
Linus Torvalds's avatar
Linus Torvalds committed
468
		priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
469
	else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
Linus Torvalds's avatar
Linus Torvalds committed
470
471
472
473
		priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
	if (control != priv->line_control) {
		control = priv->line_control;
		spin_unlock_irqrestore(&priv->lock, flags);
474
		pl2303_set_control_lines(port, control);
Linus Torvalds's avatar
Linus Torvalds committed
475
476
477
	} else {
		spin_unlock_irqrestore(&priv->lock, flags);
	}
478

479
	memset(buf, 0, 7);
480
481
482
	i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
			    GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
483
	dev_dbg(&port->dev, "0xa1:0x21:0:0  %d - %7ph\n", i, buf);
Linus Torvalds's avatar
Linus Torvalds committed
484

485
	if (C_CRTSCTS(tty)) {
486
		if (spriv->type == HX)
487
			pl2303_vendor_write(serial, 0x0, 0x61);
488
		else
489
			pl2303_vendor_write(serial, 0x0, 0x41);
t.sefzick's avatar
t.sefzick committed
490
	} else {
491
		pl2303_vendor_write(serial, 0x0, 0x0);
Linus Torvalds's avatar
Linus Torvalds committed
492
	}
493
494
495
496

	kfree(buf);
}

497
498
499
500
501
502
503
504
505
506
507
508
509
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);
	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);
510

511
	pl2303_set_control_lines(port, control);
512
513
514
}

static void pl2303_close(struct usb_serial_port *port)
515
{
Johan Hovold's avatar
Johan Hovold committed
516
	usb_serial_generic_close(port);
517
	usb_kill_urb(port->interrupt_in_urb);
Linus Torvalds's avatar
Linus Torvalds committed
518
519
}

520
static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
Linus Torvalds's avatar
Linus Torvalds committed
521
522
{
	struct usb_serial *serial = port->serial;
523
	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
Linus Torvalds's avatar
Linus Torvalds committed
524
525
	int result;

526
	if (spriv->type != HX) {
527
528
		usb_clear_halt(serial->dev, port->write_urb->pipe);
		usb_clear_halt(serial->dev, port->read_urb->pipe);
529
	} else {
Linus Torvalds's avatar
Linus Torvalds committed
530
		/* reset upstream data pipes */
531
532
		pl2303_vendor_write(serial, 8, 0);
		pl2303_vendor_write(serial, 9, 0);
Linus Torvalds's avatar
Linus Torvalds committed
533
534
535
	}

	/* Setup termios */
Alan Cox's avatar
Alan Cox committed
536
	if (tty)
537
		pl2303_set_termios(tty, port, NULL);
Linus Torvalds's avatar
Linus Torvalds committed
538

539
	result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
540
	if (result) {
541
542
		dev_err(&port->dev, "failed to submit interrupt urb: %d\n",
			result);
543
		return result;
Linus Torvalds's avatar
Linus Torvalds committed
544
	}
545

546
	result = usb_serial_generic_open(tty, port);
547
548
549
550
551
	if (result) {
		usb_kill_urb(port->interrupt_in_urb);
		return result;
	}

Linus Torvalds's avatar
Linus Torvalds committed
552
553
554
	return 0;
}

555
static int pl2303_tiocmset(struct tty_struct *tty,
556
			   unsigned int set, unsigned int clear)
Linus Torvalds's avatar
Linus Torvalds committed
557
{
Alan Cox's avatar
Alan Cox committed
558
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
559
560
561
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	u8 control;
562
	int ret;
563

564
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
565
566
567
568
569
570
571
572
573
	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;
574
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
575

576
577
578
	ret = pl2303_set_control_lines(port, control);
	if (ret)
		return usb_translate_errors(ret);
579

580
	return 0;
Linus Torvalds's avatar
Linus Torvalds committed
581
582
}

583
static int pl2303_tiocmget(struct tty_struct *tty)
Linus Torvalds's avatar
Linus Torvalds committed
584
{
Alan Cox's avatar
Alan Cox committed
585
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
586
587
588
589
590
591
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int mcr;
	unsigned int status;
	unsigned int result;

592
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
593
594
	mcr = priv->line_control;
	status = priv->line_status;
595
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
596
597
598
599
600
601
602
603

	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);

604
	dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
Linus Torvalds's avatar
Linus Torvalds committed
605
606
607
608

	return result;
}

609
610
611
static int pl2303_carrier_raised(struct usb_serial_port *port)
{
	struct pl2303_private *priv = usb_get_serial_port_data(port);
612

613
614
	if (priv->line_status & UART_DCD)
		return 1;
615

616
617
618
	return 0;
}

619
static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg)
Linus Torvalds's avatar
Linus Torvalds committed
620
{
621
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
622
623
624
625
626
627
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int prevstatus;
	unsigned int status;
	unsigned int changed;

628
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
629
	prevstatus = priv->line_status;
630
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
631
632

	while (1) {
633
		interruptible_sleep_on(&port->port.delta_msr_wait);
Linus Torvalds's avatar
Linus Torvalds committed
634
635
636
		/* see if a signal did it */
		if (signal_pending(current))
			return -ERESTARTSYS;
637

638
639
640
		if (port->serial->disconnected)
			return -EIO;

641
		spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
642
		status = priv->line_status;
643
644
		spin_unlock_irqrestore(&priv->lock, flags);

Alan Cox's avatar
Alan Cox committed
645
		changed = prevstatus ^ status;
646

Linus Torvalds's avatar
Linus Torvalds committed
647
648
649
		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
650
		    ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
Linus Torvalds's avatar
Linus Torvalds committed
651
652
653
654
655
656
657
658
			return 0;
		}
		prevstatus = status;
	}
	/* NOTREACHED */
	return 0;
}

659
static int pl2303_ioctl(struct tty_struct *tty,
660
			unsigned int cmd, unsigned long arg)
Linus Torvalds's avatar
Linus Torvalds committed
661
{
662
	struct serial_struct ser;
Alan Cox's avatar
Alan Cox committed
663
	struct usb_serial_port *port = tty->driver_data;
664

Linus Torvalds's avatar
Linus Torvalds committed
665
	switch (cmd) {
666
667
668
	case TIOCGSERIAL:
		memset(&ser, 0, sizeof ser);
		ser.type = PORT_16654;
669
		ser.line = port->minor;
670
		ser.port = port->port_number;
671
672
673
674
675
676
		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
677
678
	default:
		break;
Linus Torvalds's avatar
Linus Torvalds committed
679
	}
680

Linus Torvalds's avatar
Linus Torvalds committed
681
682
683
	return -ENOIOCTLCMD;
}

Alan Cox's avatar
Alan Cox committed
684
static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
Linus Torvalds's avatar
Linus Torvalds committed
685
{
Alan Cox's avatar
Alan Cox committed
686
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
687
688
689
690
691
692
693
694
	struct usb_serial *serial = port->serial;
	u16 state;
	int result;

	if (break_state == 0)
		state = BREAK_OFF;
	else
		state = BREAK_ON;
695

696
	dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
Alan Cox's avatar
Alan Cox committed
697
			state == BREAK_OFF ? "off" : "on");
Linus Torvalds's avatar
Linus Torvalds committed
698

699
700
701
	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
702
	if (result)
703
		dev_err(&port->dev, "error sending break = %d\n", result);
Linus Torvalds's avatar
Linus Torvalds committed
704
705
}

Flavio Leitner's avatar
Flavio Leitner committed
706
707
708
709
710
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);
711
	struct tty_struct *tty;
Flavio Leitner's avatar
Flavio Leitner committed
712
713
	unsigned long flags;
	u8 status_idx = UART_STATE;
714
	u8 length = UART_STATE + 1;
715
	u8 prev_line_status;
716
	u16 idv, idp;
Flavio Leitner's avatar
Flavio Leitner committed
717

718
719
720
721
722
723
724
725
726
727
	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
728
729
730
	}

	if (actual_length < length)
731
		return;
Flavio Leitner's avatar
Flavio Leitner committed
732

Alan Cox's avatar
Alan Cox committed
733
	/* Save off the uart status for others to look at */
Flavio Leitner's avatar
Flavio Leitner committed
734
	spin_lock_irqsave(&priv->lock, flags);
735
	prev_line_status = priv->line_status;
Flavio Leitner's avatar
Flavio Leitner committed
736
737
	priv->line_status = data[status_idx];
	spin_unlock_irqrestore(&priv->lock, flags);
738

739
740
	if (priv->line_status & UART_BREAK_ERROR)
		usb_serial_handle_break(port);
741

742
	wake_up_interruptible(&port->port.delta_msr_wait);
743
744
745
746
747
748
749
750

	tty = tty_port_tty_get(&port->port);
	if (!tty)
		return;
	if ((priv->line_status ^ prev_line_status) & UART_DCD)
		usb_serial_handle_dcd_change(port, tty,
				priv->line_status & UART_DCD);
	tty_kref_put(tty);
Flavio Leitner's avatar
Flavio Leitner committed
751
}
Linus Torvalds's avatar
Linus Torvalds committed
752

753
static void pl2303_read_int_callback(struct urb *urb)
Linus Torvalds's avatar
Linus Torvalds committed
754
{
755
	struct usb_serial_port *port =  urb->context;
Linus Torvalds's avatar
Linus Torvalds committed
756
	unsigned char *data = urb->transfer_buffer;
Flavio Leitner's avatar
Flavio Leitner committed
757
	unsigned int actual_length = urb->actual_length;
758
759
	int status = urb->status;
	int retval;
Linus Torvalds's avatar
Linus Torvalds committed
760

761
	switch (status) {
Linus Torvalds's avatar
Linus Torvalds committed
762
763
764
765
766
767
768
	case 0:
		/* success */
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
769
770
		dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
			__func__, status);
Linus Torvalds's avatar
Linus Torvalds committed
771
772
		return;
	default:
773
774
		dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
			__func__, status);
Linus Torvalds's avatar
Linus Torvalds committed
775
776
777
		goto exit;
	}

778
	usb_serial_debug_data(&port->dev, __func__,
779
780
			      urb->actual_length, urb->transfer_buffer);

Flavio Leitner's avatar
Flavio Leitner committed
781
	pl2303_update_line_status(port, data, actual_length);
Linus Torvalds's avatar
Linus Torvalds committed
782
783

exit:
784
	retval = usb_submit_urb(urb, GFP_ATOMIC);
785
	if (retval) {
786
		dev_err(&port->dev,
787
			"%s - usb_submit_urb failed with result %d\n",
788
			__func__, retval);
789
	}
Linus Torvalds's avatar
Linus Torvalds committed
790
791
}

792
static void pl2303_process_read_urb(struct urb *urb)
793
{
794
795
	struct usb_serial_port *port = urb->context;
	struct pl2303_private *priv = usb_get_serial_port_data(port);
796
797
	unsigned char *data = urb->transfer_buffer;
	char tty_flag = TTY_NORMAL;
798
799
800
801
802
803
804
805
806
807
808
809
810
	unsigned long flags;
	u8 line_status;
	int i;

	/* update line status */
	spin_lock_irqsave(&priv->lock, flags);
	line_status = priv->line_status;
	priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
	spin_unlock_irqrestore(&priv->lock, flags);

	if (!urb->actual_length)
		return;

811
812
813
814
	/*
	 * Break takes precedence over parity, which takes precedence over
	 * framing errors.
	 */
815
816
817
818
819
820
821
	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;

822
823
824
	if (tty_flag != TTY_NORMAL)
		dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__,
								tty_flag);
825
826
	/* overrun is special, not associated with a char */
	if (line_status & UART_OVERRUN_ERROR)
Jiri Slaby's avatar
Jiri Slaby committed
827
		tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
828

829
	if (port->port.console && port->sysrq) {
830
		for (i = 0; i < urb->actual_length; ++i)
831
			if (!usb_serial_handle_sysrq_char(port, data[i]))
Jiri Slaby's avatar
Jiri Slaby committed
832
833
				tty_insert_flip_char(&port->port, data[i],
						tty_flag);
834
	} else {
835
		tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
836
							urb->actual_length);
837
	}
Linus Torvalds's avatar
Linus Torvalds committed
838

Jiri Slaby's avatar
Jiri Slaby committed
839
	tty_flip_buffer_push(&port->port);
Linus Torvalds's avatar
Linus Torvalds committed
840
841
}

842
843
844
845
846
847
848
static struct usb_serial_driver pl2303_device = {
	.driver = {
		.owner =	THIS_MODULE,
		.name =		"pl2303",
	},
	.id_table =		id_table,
	.num_ports =		1,
849
	.bulk_in_size =		256,
850
	.bulk_out_size =	256,
851
852
	.open =			pl2303_open,
	.close =		pl2303_close,
853
	.dtr_rts =		pl2303_dtr_rts,
854
	.carrier_raised =	pl2303_carrier_raised,
855
856
857
858
859
	.ioctl =		pl2303_ioctl,
	.break_ctl =		pl2303_break_ctl,
	.set_termios =		pl2303_set_termios,
	.tiocmget =		pl2303_tiocmget,
	.tiocmset =		pl2303_tiocmset,
860
	.tiocmiwait =		pl2303_tiocmiwait,
861
	.process_read_urb =	pl2303_process_read_urb,
862
863
	.read_int_callback =	pl2303_read_int_callback,
	.attach =		pl2303_startup,
864
	.release =		pl2303_release,
865
866
	.port_probe =		pl2303_port_probe,
	.port_remove =		pl2303_port_remove,
867
};
Linus Torvalds's avatar
Linus Torvalds committed
868

869
870
871
872
static struct usb_serial_driver * const serial_drivers[] = {
	&pl2303_device, NULL
};

873
module_usb_serial_driver(serial_drivers, id_table);
Linus Torvalds's avatar
Linus Torvalds committed
874

875
MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver");
Linus Torvalds's avatar
Linus Torvalds committed
876
MODULE_LICENSE("GPL");