pl2303.c 23.2 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
#include "pl2303.h"

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

39
static const struct usb_device_id id_table[] = {
Linus Torvalds's avatar
Linus Torvalds committed
40
41
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
42
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
Linus Torvalds's avatar
Linus Torvalds committed
43
44
	{ 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
45
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
Steve Murphy's avatar
Steve Murphy committed
46
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
47
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
48
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
49
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },
Linus Torvalds's avatar
Linus Torvalds committed
50
	{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
51
	{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
Linus Torvalds's avatar
Linus Torvalds committed
52
53
54
55
56
	{ 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) },
57
	{ USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
Linus Torvalds's avatar
Linus Torvalds committed
58
59
60
61
62
63
64
65
	{ 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) },
66
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
Linus Torvalds's avatar
Linus Torvalds committed
67
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
68
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
69
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
70
	{ USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
71
	{ USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
72
73
	{ USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
	{ USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
74
	{ USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
75
	{ USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
76
	{ USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
77
	{ USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
78
	{ USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
79
	{ USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
80
	{ USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
81
	{ USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
82
	{ USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
Matthew Arnold's avatar
Matthew Arnold committed
83
	{ USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
84
	{ USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
85
	{ USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
86
	{ USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
87
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
88
	{ USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
89
	{ USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
90
	{ USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
Linus Torvalds's avatar
Linus Torvalds committed
91
92
93
	{ }					/* Terminating entry */
};

94
MODULE_DEVICE_TABLE(usb, id_table);
Linus Torvalds's avatar
Linus Torvalds committed
95
96
97
98
99
100
101
102
103
104

#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
105
#define BREAK_REQUEST			0x23
Linus Torvalds's avatar
Linus Torvalds committed
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
#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 */
};

136
137
138
139
struct pl2303_serial_private {
	enum pl2303_type type;
};

Linus Torvalds's avatar
Linus Torvalds committed
140
141
142
143
144
145
struct pl2303_private {
	spinlock_t lock;
	u8 line_control;
	u8 line_status;
};

146
147
148
149
150
151
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);
152
	dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x  %d - %x\n",
153
154
		VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index,
		res, buf[0]);
155
156
157
158
159
160
161
162
163
	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);
164
	dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x  %d\n",
165
166
		VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index,
		res);
167
168
169
	return res;
}

170
static int pl2303_startup(struct usb_serial *serial)
Linus Torvalds's avatar
Linus Torvalds committed
171
{
172
	struct pl2303_serial_private *spriv;
Linus Torvalds's avatar
Linus Torvalds committed
173
	enum pl2303_type type = type_0;
174
	unsigned char *buf;
175
176
177
178

	spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
	if (!spriv)
		return -ENOMEM;
Linus Torvalds's avatar
Linus Torvalds committed
179

180
	buf = kmalloc(10, GFP_KERNEL);
181
182
	if (!buf) {
		kfree(spriv);
183
		return -ENOMEM;
184
	}
185

Linus Torvalds's avatar
Linus Torvalds committed
186
187
188
189
190
191
192
193
	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;
194
	dev_dbg(&serial->interface->dev, "device type: %d\n", type);
Linus Torvalds's avatar
Linus Torvalds committed
195

196
197
	spriv->type = type;
	usb_set_serial_data(serial, spriv);
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214

	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
215
	return 0;
216
}
Linus Torvalds's avatar
Linus Torvalds committed
217

218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
static void pl2303_release(struct usb_serial *serial)
{
	struct pl2303_serial_private *spriv;

	spriv = usb_get_serial_data(serial);
	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);

238
239
	port->port.drain_delay = 256;

240
241
242
243
244
245
246
247
248
249
250
	return 0;
}

static int pl2303_port_remove(struct usb_serial_port *port)
{
	struct pl2303_private *priv;

	priv = usb_get_serial_port_data(port);
	kfree(priv);

	return 0;
Linus Torvalds's avatar
Linus Torvalds committed
251
252
}

253
static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
Linus Torvalds's avatar
Linus Torvalds committed
254
{
255
	struct usb_device *dev = port->serial->dev;
Linus Torvalds's avatar
Linus Torvalds committed
256
	int retval;
Alan Cox's avatar
Alan Cox committed
257

258
259
260
	retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
				 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
				 value, 0, NULL, 0, 100);
261
	dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__,
262
		value, retval);
Linus Torvalds's avatar
Linus Torvalds committed
263
264
265
	return retval;
}

Alan Cox's avatar
Alan Cox committed
266
267
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
268
269
{
	struct usb_serial *serial = port->serial;
270
	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
Linus Torvalds's avatar
Linus Torvalds committed
271
272
273
274
275
276
277
	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;
278
279
	const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
	                         4800, 7200, 9600, 14400, 19200, 28800, 38400,
280
	                         57600, 115200, 230400, 460800, 500000, 614400,
281
282
283
	                         921600, 1228800, 2457600, 3000000, 6000000 };
	int baud_floor, baud_ceil;
	int k;
Linus Torvalds's avatar
Linus Torvalds committed
284

285
286
287
288
	/* 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 */

289
	if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
290
291
		return;

292
	cflag = tty->termios.c_cflag;
Linus Torvalds's avatar
Linus Torvalds committed
293

294
	buf = kzalloc(7, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
295
	if (!buf) {
296
		dev_err(&port->dev, "%s - out of memory.\n", __func__);
297
		/* Report back no change occurred */
298
299
		if (old_termios)
			tty->termios = *old_termios;
Linus Torvalds's avatar
Linus Torvalds committed
300
301
302
		return;
	}

303
304
305
	i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
			    GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
306
	dev_dbg(&port->dev, "0xa1:0x21:0:0  %d - %7ph\n", i, buf);
Linus Torvalds's avatar
Linus Torvalds committed
307
308
309

	if (cflag & CSIZE) {
		switch (cflag & CSIZE) {
Alan Cox's avatar
Alan Cox committed
310
311
312
313
314
315
316
317
318
319
320
321
322
		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
323
		}
324
		dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
Linus Torvalds's avatar
Linus Torvalds committed
325
326
	}

327
328
329
330
331
	/* 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
332
	baud = tty_get_baud_rate(tty);
333
	dev_dbg(&port->dev, "baud requested = %d\n", baud);
Linus Torvalds's avatar
Linus Torvalds committed
334
	if (baud) {
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
		/* 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 */
354
			if (spriv->type != HX)
355
356
357
358
				baud = 1228800;
			else if (baud > 6000000)
				baud = 6000000;
		}
359
		dev_dbg(&port->dev, "baud set = %d\n", baud);
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
		if (baud <= 115200) {
			buf[0] = baud & 0xff;
			buf[1] = (baud >> 8) & 0xff;
			buf[2] = (baud >> 16) & 0xff;
			buf[3] = (baud >> 24) & 0xff;
		} else {
			/* apparently the formula for higher speeds is:
			 * baudrate = 12M * 32 / (2^buf[1]) / buf[0]
			 */
			unsigned tmp = 12*1000*1000*32 / baud;
			buf[3] = 0x80;
			buf[2] = 0;
			buf[1] = (tmp >= 256);
			while (tmp >= 256) {
				tmp >>= 2;
				buf[1] <<= 1;
			}
			buf[0] = tmp;
		}
Linus Torvalds's avatar
Linus Torvalds committed
379
380
381
382
383
384
	}

	/* 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) {
385
386
387
388
389
		/* 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;
390
			dev_dbg(&port->dev, "stop bits = 1.5\n");
391
392
		} else {
			buf[4] = 2;
393
			dev_dbg(&port->dev, "stop bits = 2\n");
394
		}
Linus Torvalds's avatar
Linus Torvalds committed
395
396
	} else {
		buf[4] = 0;
397
		dev_dbg(&port->dev, "stop bits = 1\n");
Linus Torvalds's avatar
Linus Torvalds committed
398
399
400
401
402
403
404
405
406
	}

	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) {
407
408
			if (cflag & CMSPAR) {
				buf[5] = 3;
409
				dev_dbg(&port->dev, "parity = mark\n");
410
411
			} else {
				buf[5] = 1;
412
				dev_dbg(&port->dev, "parity = odd\n");
413
			}
Linus Torvalds's avatar
Linus Torvalds committed
414
		} else {
415
416
			if (cflag & CMSPAR) {
				buf[5] = 4;
417
				dev_dbg(&port->dev, "parity = space\n");
418
419
			} else {
				buf[5] = 2;
420
				dev_dbg(&port->dev, "parity = even\n");
421
			}
Linus Torvalds's avatar
Linus Torvalds committed
422
423
424
		}
	} else {
		buf[5] = 0;
425
		dev_dbg(&port->dev, "parity = none\n");
Linus Torvalds's avatar
Linus Torvalds committed
426
427
	}

428
429
430
	i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
			    SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
431
	dev_dbg(&port->dev, "0x21:0x20:0:0  %d\n", i);
Linus Torvalds's avatar
Linus Torvalds committed
432
433
434
435
436
437

	/* 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);
438
	else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
Linus Torvalds's avatar
Linus Torvalds committed
439
440
441
442
		priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
	if (control != priv->line_control) {
		control = priv->line_control;
		spin_unlock_irqrestore(&priv->lock, flags);
443
		pl2303_set_control_lines(port, control);
Linus Torvalds's avatar
Linus Torvalds committed
444
445
446
	} else {
		spin_unlock_irqrestore(&priv->lock, flags);
	}
447

Linus Torvalds's avatar
Linus Torvalds committed
448
449
	buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;

450
451
452
	i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
			    GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
453
	dev_dbg(&port->dev, "0xa1:0x21:0:0  %d - %7ph\n", i, buf);
Linus Torvalds's avatar
Linus Torvalds committed
454
455

	if (cflag & CRTSCTS) {
456
		if (spriv->type == HX)
457
			pl2303_vendor_write(0x0, 0x61, serial);
Linus Torvalds's avatar
Linus Torvalds committed
458
		else
459
			pl2303_vendor_write(0x0, 0x41, serial);
t.sefzick's avatar
t.sefzick committed
460
	} else {
461
		pl2303_vendor_write(0x0, 0x0, serial);
Linus Torvalds's avatar
Linus Torvalds committed
462
	}
463

464
	/* Save resulting baud rate */
465
	if (baud)
Alan Cox's avatar
Alan Cox committed
466
		tty_encode_baud_rate(tty, baud, baud);
467

468
469
470
	kfree(buf);
}

471
472
473
474
475
476
477
478
479
480
481
482
483
484
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);
485
	pl2303_set_control_lines(port, control);
486
487
488
}

static void pl2303_close(struct usb_serial_port *port)
489
{
Johan Hovold's avatar
Johan Hovold committed
490
	usb_serial_generic_close(port);
491
	usb_kill_urb(port->interrupt_in_urb);
Linus Torvalds's avatar
Linus Torvalds committed
492
493
}

494
static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
Linus Torvalds's avatar
Linus Torvalds committed
495
496
{
	struct usb_serial *serial = port->serial;
497
	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
Linus Torvalds's avatar
Linus Torvalds committed
498
499
	int result;

500
	if (spriv->type != HX) {
501
502
		usb_clear_halt(serial->dev, port->write_urb->pipe);
		usb_clear_halt(serial->dev, port->read_urb->pipe);
503
	} else {
Linus Torvalds's avatar
Linus Torvalds committed
504
		/* reset upstream data pipes */
505
506
		pl2303_vendor_write(8, 0, serial);
		pl2303_vendor_write(9, 0, serial);
Linus Torvalds's avatar
Linus Torvalds committed
507
508
509
	}

	/* Setup termios */
Alan Cox's avatar
Alan Cox committed
510
	if (tty)
511
		pl2303_set_termios(tty, port, NULL);
Linus Torvalds's avatar
Linus Torvalds committed
512

513
	result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
514
	if (result) {
515
		dev_err(&port->dev, "%s - failed submitting interrupt urb,"
516
			" error %d\n", __func__, result);
517
		return result;
Linus Torvalds's avatar
Linus Torvalds committed
518
	}
519

520
	result = usb_serial_generic_open(tty, port);
521
522
523
524
525
	if (result) {
		usb_kill_urb(port->interrupt_in_urb);
		return result;
	}

Linus Torvalds's avatar
Linus Torvalds committed
526
527
528
	return 0;
}

529
static int pl2303_tiocmset(struct tty_struct *tty,
530
			   unsigned int set, unsigned int clear)
Linus Torvalds's avatar
Linus Torvalds committed
531
{
Alan Cox's avatar
Alan Cox committed
532
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
533
534
535
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	u8 control;
536
	int ret;
537

538
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
539
540
541
542
543
544
545
546
547
	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;
548
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
549

550
551
552
	ret = pl2303_set_control_lines(port, control);
	if (ret)
		return usb_translate_errors(ret);
553

554
	return 0;
Linus Torvalds's avatar
Linus Torvalds committed
555
556
}

557
static int pl2303_tiocmget(struct tty_struct *tty)
Linus Torvalds's avatar
Linus Torvalds committed
558
{
Alan Cox's avatar
Alan Cox committed
559
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
560
561
562
563
564
565
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int mcr;
	unsigned int status;
	unsigned int result;

566
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
567
568
	mcr = priv->line_control;
	status = priv->line_status;
569
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
570
571
572
573
574
575
576
577

	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);

578
	dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
Linus Torvalds's avatar
Linus Torvalds committed
579
580
581
582

	return result;
}

583
584
585
586
587
588
589
590
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;
}

591
static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg)
Linus Torvalds's avatar
Linus Torvalds committed
592
{
593
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
594
595
596
597
598
599
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int prevstatus;
	unsigned int status;
	unsigned int changed;

600
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
601
	prevstatus = priv->line_status;
602
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
603
604

	while (1) {
605
		interruptible_sleep_on(&port->port.delta_msr_wait);
Linus Torvalds's avatar
Linus Torvalds committed
606
607
608
		/* see if a signal did it */
		if (signal_pending(current))
			return -ERESTARTSYS;
609

610
611
612
		if (port->serial->disconnected)
			return -EIO;

613
		spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
614
		status = priv->line_status;
615
616
		spin_unlock_irqrestore(&priv->lock, flags);

Alan Cox's avatar
Alan Cox committed
617
		changed = prevstatus ^ status;
618

Linus Torvalds's avatar
Linus Torvalds committed
619
620
621
		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
622
		    ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
Linus Torvalds's avatar
Linus Torvalds committed
623
624
625
626
627
628
629
630
			return 0;
		}
		prevstatus = status;
	}
	/* NOTREACHED */
	return 0;
}

631
static int pl2303_ioctl(struct tty_struct *tty,
632
			unsigned int cmd, unsigned long arg)
Linus Torvalds's avatar
Linus Torvalds committed
633
{
634
	struct serial_struct ser;
Alan Cox's avatar
Alan Cox committed
635
	struct usb_serial_port *port = tty->driver_data;
636
637

	dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd);
Linus Torvalds's avatar
Linus Torvalds committed
638
639

	switch (cmd) {
640
641
642
	case TIOCGSERIAL:
		memset(&ser, 0, sizeof ser);
		ser.type = PORT_16654;
643
		ser.line = port->minor;
644
		ser.port = port->port_number;
645
646
647
648
649
650
		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
651
	default:
652
		dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd);
Alan Cox's avatar
Alan Cox committed
653
		break;
Linus Torvalds's avatar
Linus Torvalds committed
654
655
656
657
	}
	return -ENOIOCTLCMD;
}

Alan Cox's avatar
Alan Cox committed
658
static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
Linus Torvalds's avatar
Linus Torvalds committed
659
{
Alan Cox's avatar
Alan Cox committed
660
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
661
662
663
664
665
666
667
668
	struct usb_serial *serial = port->serial;
	u16 state;
	int result;

	if (break_state == 0)
		state = BREAK_OFF;
	else
		state = BREAK_ON;
669
	dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
Alan Cox's avatar
Alan Cox committed
670
			state == BREAK_OFF ? "off" : "on");
Linus Torvalds's avatar
Linus Torvalds committed
671

672
673
674
	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
675
	if (result)
676
		dev_err(&port->dev, "error sending break = %d\n", result);
Linus Torvalds's avatar
Linus Torvalds committed
677
678
}

Flavio Leitner's avatar
Flavio Leitner committed
679
680
681
682
683
684
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);
685
	struct tty_struct *tty;
Flavio Leitner's avatar
Flavio Leitner committed
686
687
	unsigned long flags;
	u8 status_idx = UART_STATE;
688
	u8 length = UART_STATE + 1;
689
	u8 prev_line_status;
690
	u16 idv, idp;
Flavio Leitner's avatar
Flavio Leitner committed
691

692
693
694
695
696
697
698
699
700
701
702
703
	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
704
705
706
	}

	if (actual_length < length)
707
		return;
Flavio Leitner's avatar
Flavio Leitner committed
708

Alan Cox's avatar
Alan Cox committed
709
	/* Save off the uart status for others to look at */
Flavio Leitner's avatar
Flavio Leitner committed
710
	spin_lock_irqsave(&priv->lock, flags);
711
	prev_line_status = priv->line_status;
Flavio Leitner's avatar
Flavio Leitner committed
712
713
	priv->line_status = data[status_idx];
	spin_unlock_irqrestore(&priv->lock, flags);
714
715
	if (priv->line_status & UART_BREAK_ERROR)
		usb_serial_handle_break(port);
716
	wake_up_interruptible(&port->port.delta_msr_wait);
717
718
719
720
721
722
723
724

	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
725
}
Linus Torvalds's avatar
Linus Torvalds committed
726

727
static void pl2303_read_int_callback(struct urb *urb)
Linus Torvalds's avatar
Linus Torvalds committed
728
{
729
	struct usb_serial_port *port =  urb->context;
Linus Torvalds's avatar
Linus Torvalds committed
730
	unsigned char *data = urb->transfer_buffer;
Flavio Leitner's avatar
Flavio Leitner committed
731
	unsigned int actual_length = urb->actual_length;
732
733
	int status = urb->status;
	int retval;
Linus Torvalds's avatar
Linus Torvalds committed
734

735
	switch (status) {
Linus Torvalds's avatar
Linus Torvalds committed
736
737
738
739
740
741
742
	case 0:
		/* success */
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
743
744
		dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
			__func__, status);
Linus Torvalds's avatar
Linus Torvalds committed
745
746
		return;
	default:
747
748
		dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
			__func__, status);
Linus Torvalds's avatar
Linus Torvalds committed
749
750
751
		goto exit;
	}

752
	usb_serial_debug_data(&port->dev, __func__,
753
754
			      urb->actual_length, urb->transfer_buffer);

Flavio Leitner's avatar
Flavio Leitner committed
755
	pl2303_update_line_status(port, data, actual_length);
Linus Torvalds's avatar
Linus Torvalds committed
756
757

exit:
758
759
	retval = usb_submit_urb(urb, GFP_ATOMIC);
	if (retval)
760
		dev_err(&port->dev,
761
			"%s - usb_submit_urb failed with result %d\n",
762
			__func__, retval);
Linus Torvalds's avatar
Linus Torvalds committed
763
764
}

765
static void pl2303_process_read_urb(struct urb *urb)
766
{
767
768
	struct usb_serial_port *port = urb->context;
	struct pl2303_private *priv = usb_get_serial_port_data(port);
769
770
	unsigned char *data = urb->transfer_buffer;
	char tty_flag = TTY_NORMAL;
771
772
773
774
775
776
777
778
779
	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);
780
	wake_up_interruptible(&port->port.delta_msr_wait);
781
782
783
784

	if (!urb->actual_length)
		return;

785
786
787
788
789
790
791
792
	/* 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;
793
	dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, tty_flag);
794
795
796

	/* overrun is special, not associated with a char */
	if (line_status & UART_OVERRUN_ERROR)
Jiri Slaby's avatar
Jiri Slaby committed
797
		tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
798

799
	if (port->port.console && port->sysrq) {
800
		for (i = 0; i < urb->actual_length; ++i)
801
			if (!usb_serial_handle_sysrq_char(port, data[i]))
Jiri Slaby's avatar
Jiri Slaby committed
802
803
				tty_insert_flip_char(&port->port, data[i],
						tty_flag);
804
	} else {
805
		tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
806
							urb->actual_length);
807
	}
Linus Torvalds's avatar
Linus Torvalds committed
808

Jiri Slaby's avatar
Jiri Slaby committed
809
	tty_flip_buffer_push(&port->port);
Linus Torvalds's avatar
Linus Torvalds committed
810
811
}

812
813
814
815
816
817
818
819
/* All of the device info needed for the PL2303 SIO serial converter */
static struct usb_serial_driver pl2303_device = {
	.driver = {
		.owner =	THIS_MODULE,
		.name =		"pl2303",
	},
	.id_table =		id_table,
	.num_ports =		1,
820
	.bulk_in_size =		256,
821
	.bulk_out_size =	256,
822
823
	.open =			pl2303_open,
	.close =		pl2303_close,
824
825
	.dtr_rts = 		pl2303_dtr_rts,
	.carrier_raised =	pl2303_carrier_raised,
826
827
828
829
830
	.ioctl =		pl2303_ioctl,
	.break_ctl =		pl2303_break_ctl,
	.set_termios =		pl2303_set_termios,
	.tiocmget =		pl2303_tiocmget,
	.tiocmset =		pl2303_tiocmset,
831
	.tiocmiwait =		pl2303_tiocmiwait,
832
	.process_read_urb =	pl2303_process_read_urb,
833
834
	.read_int_callback =	pl2303_read_int_callback,
	.attach =		pl2303_startup,
835
	.release =		pl2303_release,
836
837
	.port_probe =		pl2303_port_probe,
	.port_remove =		pl2303_port_remove,
838
};
Linus Torvalds's avatar
Linus Torvalds committed
839

840
841
842
843
static struct usb_serial_driver * const serial_drivers[] = {
	&pl2303_device, NULL
};

844
module_usb_serial_driver(serial_drivers, id_table);
Linus Torvalds's avatar
Linus Torvalds committed
845
846
847

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");