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
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
238
239
240
241
242
243
244
245
246
247
248
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);

	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
249
250
}

251
static int set_control_lines(struct usb_device *dev, u8 value)
Linus Torvalds's avatar
Linus Torvalds committed
252
253
{
	int retval;
Alan Cox's avatar
Alan Cox committed
254

255
256
257
	retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
				 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
				 value, 0, NULL, 0, 100);
258
259
	dev_dbg(&dev->dev, "%s - value = %d, retval = %d\n", __func__,
		value, retval);
Linus Torvalds's avatar
Linus Torvalds committed
260
261
262
	return retval;
}

Alan Cox's avatar
Alan Cox committed
263
264
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
265
266
{
	struct usb_serial *serial = port->serial;
267
	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
Linus Torvalds's avatar
Linus Torvalds committed
268
269
270
271
272
273
274
	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;
275
276
277
278
279
280
	const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
	                         4800, 7200, 9600, 14400, 19200, 28800, 38400,
	                         57600, 115200, 230400, 460800, 614400,
	                         921600, 1228800, 2457600, 3000000, 6000000 };
	int baud_floor, baud_ceil;
	int k;
Linus Torvalds's avatar
Linus Torvalds committed
281

282
283
284
285
	/* 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 */

286
	if (!tty_termios_hw_change(&tty->termios, old_termios))
287
288
		return;

289
	cflag = tty->termios.c_cflag;
Linus Torvalds's avatar
Linus Torvalds committed
290

291
	buf = kzalloc(7, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
292
	if (!buf) {
293
		dev_err(&port->dev, "%s - out of memory.\n", __func__);
294
		/* Report back no change occurred */
295
		tty->termios = *old_termios;
Linus Torvalds's avatar
Linus Torvalds committed
296
297
298
		return;
	}

299
300
301
	i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
			    GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
302
	dev_dbg(&port->dev, "0xa1:0x21:0:0  %d - %x %x %x %x %x %x %x\n", i,
303
	    buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
Linus Torvalds's avatar
Linus Torvalds committed
304
305
306

	if (cflag & CSIZE) {
		switch (cflag & CSIZE) {
Alan Cox's avatar
Alan Cox committed
307
308
309
310
311
312
313
314
315
316
317
318
319
		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
320
		}
321
		dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
Linus Torvalds's avatar
Linus Torvalds committed
322
323
	}

324
325
326
327
328
	/* 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
329
	baud = tty_get_baud_rate(tty);
330
	dev_dbg(&port->dev, "baud requested = %d\n", baud);
Linus Torvalds's avatar
Linus Torvalds committed
331
	if (baud) {
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
		/* 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 */
351
			if (spriv->type != HX)
352
353
354
355
				baud = 1228800;
			else if (baud > 6000000)
				baud = 6000000;
		}
356
		dev_dbg(&port->dev, "baud set = %d\n", baud);
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
		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
376
377
378
379
380
381
	}

	/* 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) {
382
383
384
385
386
		/* 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;
387
			dev_dbg(&port->dev, "stop bits = 1.5\n");
388
389
		} else {
			buf[4] = 2;
390
			dev_dbg(&port->dev, "stop bits = 2\n");
391
		}
Linus Torvalds's avatar
Linus Torvalds committed
392
393
	} else {
		buf[4] = 0;
394
		dev_dbg(&port->dev, "stop bits = 1\n");
Linus Torvalds's avatar
Linus Torvalds committed
395
396
397
398
399
400
401
402
403
	}

	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) {
404
405
			if (cflag & CMSPAR) {
				buf[5] = 3;
406
				dev_dbg(&port->dev, "parity = mark\n");
407
408
			} else {
				buf[5] = 1;
409
				dev_dbg(&port->dev, "parity = odd\n");
410
			}
Linus Torvalds's avatar
Linus Torvalds committed
411
		} else {
412
413
			if (cflag & CMSPAR) {
				buf[5] = 4;
414
				dev_dbg(&port->dev, "parity = space\n");
415
416
			} else {
				buf[5] = 2;
417
				dev_dbg(&port->dev, "parity = even\n");
418
			}
Linus Torvalds's avatar
Linus Torvalds committed
419
420
421
		}
	} else {
		buf[5] = 0;
422
		dev_dbg(&port->dev, "parity = none\n");
Linus Torvalds's avatar
Linus Torvalds committed
423
424
	}

425
426
427
	i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
			    SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
428
	dev_dbg(&port->dev, "0x21:0x20:0:0  %d\n", i);
Linus Torvalds's avatar
Linus Torvalds committed
429
430
431
432
433
434

	/* 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);
435
	else if ((old_termios->c_cflag & CBAUD) == B0)
Linus Torvalds's avatar
Linus Torvalds committed
436
437
438
439
440
441
442
443
		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);
	}
444

Linus Torvalds's avatar
Linus Torvalds committed
445
446
	buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;

447
448
449
	i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
			    GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
450
	dev_dbg(&port->dev, "0xa1:0x21:0:0  %d - %x %x %x %x %x %x %x\n", i,
Linus Torvalds's avatar
Linus Torvalds committed
451
452
453
	     buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);

	if (cflag & CRTSCTS) {
454
		if (spriv->type == HX)
455
			pl2303_vendor_write(0x0, 0x61, serial);
Linus Torvalds's avatar
Linus Torvalds committed
456
		else
457
			pl2303_vendor_write(0x0, 0x41, serial);
t.sefzick's avatar
t.sefzick committed
458
	} else {
459
		pl2303_vendor_write(0x0, 0x0, serial);
Linus Torvalds's avatar
Linus Torvalds committed
460
	}
461

462
	/* Save resulting baud rate */
463
	if (baud)
Alan Cox's avatar
Alan Cox committed
464
		tty_encode_baud_rate(tty, baud, baud);
465

466
467
468
	kfree(buf);
}

469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
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)
487
{
Johan Hovold's avatar
Johan Hovold committed
488
	usb_serial_generic_close(port);
489
	usb_kill_urb(port->interrupt_in_urb);
Linus Torvalds's avatar
Linus Torvalds committed
490
491
}

492
static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
Linus Torvalds's avatar
Linus Torvalds committed
493
{
Alan Cox's avatar
Alan Cox committed
494
	struct ktermios tmp_termios;
Linus Torvalds's avatar
Linus Torvalds committed
495
	struct usb_serial *serial = port->serial;
496
	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
Linus Torvalds's avatar
Linus Torvalds committed
497
498
	int result;

499
	if (spriv->type != HX) {
500
501
		usb_clear_halt(serial->dev, port->write_urb->pipe);
		usb_clear_halt(serial->dev, port->read_urb->pipe);
502
	} else {
Linus Torvalds's avatar
Linus Torvalds committed
503
		/* reset upstream data pipes */
504
505
		pl2303_vendor_write(8, 0, serial);
		pl2303_vendor_write(9, 0, serial);
Linus Torvalds's avatar
Linus Torvalds committed
506
507
508
	}

	/* Setup termios */
Alan Cox's avatar
Alan Cox committed
509
510
	if (tty)
		pl2303_set_termios(tty, port, &tmp_termios);
Linus Torvalds's avatar
Linus Torvalds committed
511

512
	result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
513
	if (result) {
514
		dev_err(&port->dev, "%s - failed submitting interrupt urb,"
515
			" error %d\n", __func__, result);
516
		return result;
Linus Torvalds's avatar
Linus Torvalds committed
517
	}
518

519
	result = usb_serial_generic_open(tty, port);
520
521
522
523
524
	if (result) {
		usb_kill_urb(port->interrupt_in_urb);
		return result;
	}

525
	port->port.drain_delay = 256;
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;
533
	struct usb_serial *serial = port->serial;
Linus Torvalds's avatar
Linus Torvalds committed
534
535
536
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	u8 control;
537
	int ret;
538

539
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
540
541
542
543
544
545
546
547
548
	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;
549
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
550

551
552
553
554
555
556
557
558
	mutex_lock(&serial->disc_mutex);
	if (!serial->disconnected)
		ret = set_control_lines(serial->dev, control);
	else
		ret = -ENODEV;
	mutex_unlock(&serial->disc_mutex);

	return ret;
Linus Torvalds's avatar
Linus Torvalds committed
559
560
}

561
static int pl2303_tiocmget(struct tty_struct *tty)
Linus Torvalds's avatar
Linus Torvalds committed
562
{
Alan Cox's avatar
Alan Cox committed
563
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
564
565
566
567
568
569
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int mcr;
	unsigned int status;
	unsigned int result;

570
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
571
572
	mcr = priv->line_control;
	status = priv->line_status;
573
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
574
575
576
577
578
579
580
581

	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);

582
	dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
Linus Torvalds's avatar
Linus Torvalds committed
583
584
585
586

	return result;
}

587
588
589
590
591
592
593
594
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
595
596
597
598
599
600
601
602
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;

603
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
604
	prevstatus = priv->line_status;
605
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
606
607

	while (1) {
608
		interruptible_sleep_on(&port->delta_msr_wait);
Linus Torvalds's avatar
Linus Torvalds committed
609
610
611
		/* see if a signal did it */
		if (signal_pending(current))
			return -ERESTARTSYS;
612

613
614
615
		if (port->serial->disconnected)
			return -EIO;

616
		spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
617
		status = priv->line_status;
618
619
		spin_unlock_irqrestore(&priv->lock, flags);

Alan Cox's avatar
Alan Cox committed
620
		changed = prevstatus ^ status;
621

Linus Torvalds's avatar
Linus Torvalds committed
622
623
624
		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
625
		    ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
Linus Torvalds's avatar
Linus Torvalds committed
626
627
628
629
630
631
632
633
			return 0;
		}
		prevstatus = status;
	}
	/* NOTREACHED */
	return 0;
}

634
static int pl2303_ioctl(struct tty_struct *tty,
635
			unsigned int cmd, unsigned long arg)
Linus Torvalds's avatar
Linus Torvalds committed
636
{
637
	struct serial_struct ser;
Alan Cox's avatar
Alan Cox committed
638
	struct usb_serial_port *port = tty->driver_data;
639
640

	dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd);
Linus Torvalds's avatar
Linus Torvalds committed
641
642

	switch (cmd) {
643
644
645
646
647
648
649
650
651
652
653
654
	case TIOCGSERIAL:
		memset(&ser, 0, sizeof ser);
		ser.type = PORT_16654;
		ser.line = port->serial->minor;
		ser.port = port->number;
		ser.baud_base = 460800;

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

		return 0;

Alan Cox's avatar
Alan Cox committed
655
	case TIOCMIWAIT:
656
		dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__);
Alan Cox's avatar
Alan Cox committed
657
658
		return wait_modem_info(port, arg);
	default:
659
		dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd);
Alan Cox's avatar
Alan Cox committed
660
		break;
Linus Torvalds's avatar
Linus Torvalds committed
661
662
663
664
	}
	return -ENOIOCTLCMD;
}

Alan Cox's avatar
Alan Cox committed
665
static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
Linus Torvalds's avatar
Linus Torvalds committed
666
{
Alan Cox's avatar
Alan Cox committed
667
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
668
669
670
671
672
673
674
675
	struct usb_serial *serial = port->serial;
	u16 state;
	int result;

	if (break_state == 0)
		state = BREAK_OFF;
	else
		state = BREAK_ON;
676
	dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
Alan Cox's avatar
Alan Cox committed
677
			state == BREAK_OFF ? "off" : "on");
Linus Torvalds's avatar
Linus Torvalds committed
678

679
680
681
	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
682
	if (result)
683
		dev_err(&port->dev, "error sending break = %d\n", result);
Linus Torvalds's avatar
Linus Torvalds committed
684
685
}

Flavio Leitner's avatar
Flavio Leitner committed
686
687
688
689
690
691
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);
692
	struct tty_struct *tty;
Flavio Leitner's avatar
Flavio Leitner committed
693
694
	unsigned long flags;
	u8 status_idx = UART_STATE;
695
	u8 length = UART_STATE + 1;
696
	u8 prev_line_status;
697
	u16 idv, idp;
Flavio Leitner's avatar
Flavio Leitner committed
698

699
700
701
702
703
704
705
706
707
708
709
710
	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
711
712
713
	}

	if (actual_length < length)
714
		return;
Flavio Leitner's avatar
Flavio Leitner committed
715

Alan Cox's avatar
Alan Cox committed
716
	/* Save off the uart status for others to look at */
Flavio Leitner's avatar
Flavio Leitner committed
717
	spin_lock_irqsave(&priv->lock, flags);
718
	prev_line_status = priv->line_status;
Flavio Leitner's avatar
Flavio Leitner committed
719
720
	priv->line_status = data[status_idx];
	spin_unlock_irqrestore(&priv->lock, flags);
721
722
	if (priv->line_status & UART_BREAK_ERROR)
		usb_serial_handle_break(port);
723
	wake_up_interruptible(&port->delta_msr_wait);
724
725
726
727
728
729
730
731

	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
732
}
Linus Torvalds's avatar
Linus Torvalds committed
733

734
static void pl2303_read_int_callback(struct urb *urb)
Linus Torvalds's avatar
Linus Torvalds committed
735
{
736
	struct usb_serial_port *port =  urb->context;
Linus Torvalds's avatar
Linus Torvalds committed
737
	unsigned char *data = urb->transfer_buffer;
Flavio Leitner's avatar
Flavio Leitner committed
738
	unsigned int actual_length = urb->actual_length;
739
740
	int status = urb->status;
	int retval;
Linus Torvalds's avatar
Linus Torvalds committed
741

742
	switch (status) {
Linus Torvalds's avatar
Linus Torvalds committed
743
744
745
746
747
748
749
	case 0:
		/* success */
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
750
751
		dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
			__func__, status);
Linus Torvalds's avatar
Linus Torvalds committed
752
753
		return;
	default:
754
755
		dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
			__func__, status);
Linus Torvalds's avatar
Linus Torvalds committed
756
757
758
		goto exit;
	}

759
	usb_serial_debug_data(&port->dev, __func__,
760
761
			      urb->actual_length, urb->transfer_buffer);

Flavio Leitner's avatar
Flavio Leitner committed
762
	pl2303_update_line_status(port, data, actual_length);
Linus Torvalds's avatar
Linus Torvalds committed
763
764

exit:
765
766
	retval = usb_submit_urb(urb, GFP_ATOMIC);
	if (retval)
767
		dev_err(&port->dev,
768
			"%s - usb_submit_urb failed with result %d\n",
769
			__func__, retval);
Linus Torvalds's avatar
Linus Torvalds committed
770
771
}

772
static void pl2303_process_read_urb(struct urb *urb)
773
{
774
775
	struct usb_serial_port *port = urb->context;
	struct pl2303_private *priv = usb_get_serial_port_data(port);
776
777
	unsigned char *data = urb->transfer_buffer;
	char tty_flag = TTY_NORMAL;
778
779
780
781
782
783
784
785
786
	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);
787
	wake_up_interruptible(&port->delta_msr_wait);
788
789
790
791

	if (!urb->actual_length)
		return;

792
793
794
795
796
797
798
799
	/* 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;
800
	dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, tty_flag);
801
802
803

	/* overrun is special, not associated with a char */
	if (line_status & UART_OVERRUN_ERROR)
Jiri Slaby's avatar
Jiri Slaby committed
804
		tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
805

806
	if (port->port.console && port->sysrq) {
807
		for (i = 0; i < urb->actual_length; ++i)
808
			if (!usb_serial_handle_sysrq_char(port, data[i]))
Jiri Slaby's avatar
Jiri Slaby committed
809
810
				tty_insert_flip_char(&port->port, data[i],
						tty_flag);
811
	} else {
812
		tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
813
							urb->actual_length);
814
	}
Linus Torvalds's avatar
Linus Torvalds committed
815

Jiri Slaby's avatar
Jiri Slaby committed
816
	tty_flip_buffer_push(&port->port);
Linus Torvalds's avatar
Linus Torvalds committed
817
818
}

819
820
821
822
823
824
825
826
/* 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,
827
	.bulk_in_size =		256,
828
	.bulk_out_size =	256,
829
830
	.open =			pl2303_open,
	.close =		pl2303_close,
831
832
	.dtr_rts = 		pl2303_dtr_rts,
	.carrier_raised =	pl2303_carrier_raised,
833
834
835
836
837
	.ioctl =		pl2303_ioctl,
	.break_ctl =		pl2303_break_ctl,
	.set_termios =		pl2303_set_termios,
	.tiocmget =		pl2303_tiocmget,
	.tiocmset =		pl2303_tiocmset,
838
	.process_read_urb =	pl2303_process_read_urb,
839
840
	.read_int_callback =	pl2303_read_int_callback,
	.attach =		pl2303_startup,
841
	.release =		pl2303_release,
842
843
	.port_probe =		pl2303_port_probe,
	.port_remove =		pl2303_port_remove,
844
};
Linus Torvalds's avatar
Linus Torvalds committed
845

846
847
848
849
static struct usb_serial_driver * const serial_drivers[] = {
	&pl2303_device, NULL
};

850
module_usb_serial_driver(serial_drivers, id_table);
Linus Torvalds's avatar
Linus Torvalds committed
851
852
853

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