pl2303.c 24.7 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
1
2
3
/*
 * Prolific PL2303 USB to serial adaptor driver
 *
4
 * Copyright (C) 2001-2007 Greg Kroah-Hartman (greg@kroah.com)
Linus Torvalds's avatar
Linus Torvalds committed
5
6
 * Copyright (C) 2003 IBM Corp.
 *
7
8
9
10
11
 * Copyright (C) 2009, 2013 Frank Schäfer <fschaefer.oss@googlemail.com>
 *  - fixes, improvements and documentation for the baud rate encoding methods
 * Copyright (C) 2013 Reinhard Max <max@suse.de>
 *  - fixes and improvements for the divisor based baud rate encoding method
 *
Linus Torvalds's avatar
Linus Torvalds committed
12
13
 * Original driver for 2.2.x by anonymous
 *
14
15
16
 *	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
17
 *
Alan Cox's avatar
Alan Cox committed
18
19
 * See Documentation/usb/usb-serial.txt for more information on using this
 * driver
Linus Torvalds's avatar
Linus Torvalds committed
20
21
22
23
24
25
26
27
28
29
30
31
32
33
 *
 */

#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
34
#include <linux/uaccess.h>
Linus Torvalds's avatar
Linus Torvalds committed
35
#include <linux/usb.h>
36
#include <linux/usb/serial.h>
37
#include <asm/unaligned.h>
Linus Torvalds's avatar
Linus Torvalds committed
38
39
40
41
42
43
44
#include "pl2303.h"

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

45
static const struct usb_device_id id_table[] = {
Linus Torvalds's avatar
Linus Torvalds committed
46
47
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
48
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
Linus Torvalds's avatar
Linus Torvalds committed
49
50
	{ 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
51
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
Steve Murphy's avatar
Steve Murphy committed
52
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
53
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
54
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
55
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },
Linus Torvalds's avatar
Linus Torvalds committed
56
	{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
57
	{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
Linus Torvalds's avatar
Linus Torvalds committed
58
59
60
61
62
	{ 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) },
63
	{ USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
Linus Torvalds's avatar
Linus Torvalds committed
64
65
66
67
68
69
70
71
	{ 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) },
72
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
Linus Torvalds's avatar
Linus Torvalds committed
73
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
74
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
75
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
76
	{ USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
77
	{ USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
78
79
	{ USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
	{ USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
80
	{ USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
81
	{ USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
82
	{ USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
83
	{ USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
84
	{ USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
85
	{ USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
86
	{ USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
87
	{ USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
88
	{ USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
Matthew Arnold's avatar
Matthew Arnold committed
89
	{ USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
90
	{ USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
91
	{ USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
92
	{ USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
93
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
94
	{ USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
95
	{ USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
96
	{ USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
Linus Torvalds's avatar
Linus Torvalds committed
97
98
99
	{ }					/* Terminating entry */
};

100
MODULE_DEVICE_TABLE(usb, id_table);
Linus Torvalds's avatar
Linus Torvalds committed
101
102
103
104
105
106
107
108
109
110

#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
111
#define BREAK_REQUEST			0x23
Linus Torvalds's avatar
Linus Torvalds committed
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
#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 {
137
138
139
	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
140
141
};

142
143
144
145
struct pl2303_serial_private {
	enum pl2303_type type;
};

Linus Torvalds's avatar
Linus Torvalds committed
146
147
148
149
150
151
struct pl2303_private {
	spinlock_t lock;
	u8 line_control;
	u8 line_status;
};

152
153
154
155
156
157
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);
158
	dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x  %d - %x\n",
159
160
		VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index,
		res, buf[0]);
161
162
163
164
165
166
167
168
169
	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);
170
	dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x  %d\n",
171
172
		VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index,
		res);
173
174
175
	return res;
}

176
static int pl2303_startup(struct usb_serial *serial)
Linus Torvalds's avatar
Linus Torvalds committed
177
{
178
	struct pl2303_serial_private *spriv;
Linus Torvalds's avatar
Linus Torvalds committed
179
	enum pl2303_type type = type_0;
180
	unsigned char *buf;
181
182
183
184

	spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
	if (!spriv)
		return -ENOMEM;
Linus Torvalds's avatar
Linus Torvalds committed
185

186
	buf = kmalloc(10, GFP_KERNEL);
187
188
	if (!buf) {
		kfree(spriv);
189
		return -ENOMEM;
190
	}
191

192
	if (serial->dev->descriptor.bDeviceClass == 0x02)
Linus Torvalds's avatar
Linus Torvalds committed
193
		type = type_0;
194
	else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
195
		type = HX;
196
197
198
	else if (serial->dev->descriptor.bDeviceClass == 0x00)
		type = type_1;
	else if (serial->dev->descriptor.bDeviceClass == 0xFF)
Linus Torvalds's avatar
Linus Torvalds committed
199
		type = type_1;
200
	dev_dbg(&serial->interface->dev, "device type: %d\n", type);
Linus Torvalds's avatar
Linus Torvalds committed
201

202
203
	spriv->type = type;
	usb_set_serial_data(serial, spriv);
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);
215
	if (type == HX)
216
		pl2303_vendor_write(2, 0x44, serial);
217
218
	else
		pl2303_vendor_write(2, 0x24, serial);
219
220

	kfree(buf);
Linus Torvalds's avatar
Linus Torvalds committed
221
	return 0;
222
}
Linus Torvalds's avatar
Linus Torvalds committed
223

224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
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);

244
245
	port->port.drain_delay = 256;

246
247
248
249
250
251
252
253
254
255
256
	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
257
258
}

259
static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
Linus Torvalds's avatar
Linus Torvalds committed
260
{
261
	struct usb_device *dev = port->serial->dev;
Linus Torvalds's avatar
Linus Torvalds committed
262
	int retval;
Alan Cox's avatar
Alan Cox committed
263

264
265
266
	retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
				 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
				 value, 0, NULL, 0, 100);
267
	dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__,
268
		value, retval);
Linus Torvalds's avatar
Linus Torvalds committed
269
270
271
	return retval;
}

272
273
274
static void pl2303_encode_baudrate(struct tty_struct *tty,
					struct usb_serial_port *port,
					u8 buf[4])
Linus Torvalds's avatar
Linus Torvalds committed
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, 500000, 614400,
	                         921600, 1228800, 2457600, 3000000, 6000000 };

281
282
	struct usb_serial *serial = port->serial;
	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
283
	int baud;
284
	int i;
Linus Torvalds's avatar
Linus Torvalds committed
285

286
287
288
289
290
	/*
	 * 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
291
	baud = tty_get_baud_rate(tty);
292
	dev_dbg(&port->dev, "baud requested = %d\n", baud);
293
294
	if (!baud)
		return;
295

296
297
298
299
300
	/* Set baudrate to nearest supported value */
	for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) {
		if (baud_sup[i] > baud)
			break;
	}
301

302
303
304
305
306
307
	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];
308

309
310
311
	/* type_0, type_1 only support up to 1228800 baud */
	if (spriv->type != HX)
		baud = min_t(int, baud, 1228800);
312

313
	if (spriv->type != HX || baud <= 115200) {
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
		/* Direct (standard) baud rate encoding method */
		put_unaligned_le32(baud, buf);
	} else {
		/*
		 * Divisor based baud rate encoding method
		 *
		 * NOTE: it's not clear if the type_0/1 chips
		 * support this method
		 *
		 * divisor = 12MHz * 32 / baudrate = 2^A * B
		 *
		 * with
		 *
		 * A = buf[1] & 0x0e
		 * B = buf[0]  +  (buf[1] & 0x01) << 8
		 *
		 * Special cases:
		 * => 8 < B < 16: device seems to work not properly
		 * => B <= 8: device uses the max. value B = 512 instead
		 */
334

335
		/* Determine factors A and B */
336
337
		unsigned int A = 0;
		unsigned int B = 12000000 * 32 / baud;  /* 12MHz */
338
339
340
341
342
343
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
		B <<= 1; /* Add one bit for rounding */
		while (B > (512 << 1) && A <= 14) {
			A += 2;
			B >>= 2;
		}
		if (A > 14) { /* max. divisor = min. baudrate reached */
			A = 14;
			B = 512;
			/* => ~45.78 baud */
		} else {
			B = (B + 1) >> 1; /* Round the last bit */
		}
		/* Handle special cases */
		if (B == 512)
			B = 0; /* also: 1 to 8 */
		else if (B < 16)
			/*
			 * NOTE: With the current algorithm this happens
			 * only for A=0 and means that the min. divisor
			 * (respectively: the max. baudrate) is reached.
			 */
			B = 16;		/* => 24 MBaud */
		/* Encode the baud rate */
		buf[3] = 0x80;     /* Select divisor encoding method */
		buf[2] = 0;
		buf[1] = (A & 0x0e);		/* A */
		buf[1] |= ((B & 0x100) >> 8);	/* MSB of B */
		buf[0] = B & 0xff;		/* 8 LSBs of B */
		/* Calculate the actual/resulting baud rate */
		if (B <= 8)
			B = 512;
		baud = 12000000 * 32 / ((1 << A) * B);
	}

372
	/* Save resulting baud rate */
373
374
	tty_encode_baud_rate(tty, baud, baud);
	dev_dbg(&port->dev, "baud set = %d\n", baud);
375
376
377
378
379
380
381
382
383
384
385
386
387
}

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;

388
389
390
391
392
	/*
	 * 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.
	 */
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
	if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
		return;

	buf = kzalloc(7, GFP_KERNEL);
	if (!buf) {
		dev_err(&port->dev, "%s - out of memory.\n", __func__);
		/* 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);

410
411
	if (C_CSIZE(tty)) {
		switch (C_CSIZE(tty)) {
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
		case CS5:
			buf[6] = 5;
			break;
		case CS6:
			buf[6] = 6;
			break;
		case CS7:
			buf[6] = 7;
			break;
		default:
		case CS8:
			buf[6] = 8;
		}
		dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
	}

428
429
	/* For reference buf[0]:buf[3] baud rate value */
	pl2303_encode_baudrate(tty, port, &buf[0]);
430

Linus Torvalds's avatar
Linus Torvalds committed
431
432
433
	/* 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 */
434
435
436
	if (C_CSTOPB(tty)) {
		/*
		 * NOTE: Comply with "real" UARTs / RS232:
437
438
		 *       use 1.5 instead of 2 stop bits with 5 data bits
		 */
439
		if (C_CSIZE(tty) == CS5) {
440
			buf[4] = 1;
441
			dev_dbg(&port->dev, "stop bits = 1.5\n");
442
443
		} else {
			buf[4] = 2;
444
			dev_dbg(&port->dev, "stop bits = 2\n");
445
		}
Linus Torvalds's avatar
Linus Torvalds committed
446
447
	} else {
		buf[4] = 0;
448
		dev_dbg(&port->dev, "stop bits = 1\n");
Linus Torvalds's avatar
Linus Torvalds committed
449
450
	}

451
	if (C_PARENB(tty)) {
Linus Torvalds's avatar
Linus Torvalds committed
452
453
454
455
456
		/* 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 */
457
458
		if (C_PARODD(tty)) {
			if (tty->termios.c_cflag & CMSPAR) {
459
				buf[5] = 3;
460
				dev_dbg(&port->dev, "parity = mark\n");
461
462
			} else {
				buf[5] = 1;
463
				dev_dbg(&port->dev, "parity = odd\n");
464
			}
Linus Torvalds's avatar
Linus Torvalds committed
465
		} else {
466
			if (tty->termios.c_cflag & CMSPAR) {
467
				buf[5] = 4;
468
				dev_dbg(&port->dev, "parity = space\n");
469
470
			} else {
				buf[5] = 2;
471
				dev_dbg(&port->dev, "parity = even\n");
472
			}
Linus Torvalds's avatar
Linus Torvalds committed
473
474
475
		}
	} else {
		buf[5] = 0;
476
		dev_dbg(&port->dev, "parity = none\n");
Linus Torvalds's avatar
Linus Torvalds committed
477
478
	}

479
480
481
	i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
			    SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
482
	dev_dbg(&port->dev, "0x21:0x20:0:0  %d\n", i);
Linus Torvalds's avatar
Linus Torvalds committed
483
484
485
486

	/* change control lines if we are switching to or from B0 */
	spin_lock_irqsave(&priv->lock, flags);
	control = priv->line_control;
487
	if (C_BAUD(tty) == B0)
Linus Torvalds's avatar
Linus Torvalds committed
488
		priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
489
	else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
Linus Torvalds's avatar
Linus Torvalds committed
490
491
492
493
		priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
	if (control != priv->line_control) {
		control = priv->line_control;
		spin_unlock_irqrestore(&priv->lock, flags);
494
		pl2303_set_control_lines(port, control);
Linus Torvalds's avatar
Linus Torvalds committed
495
496
497
	} else {
		spin_unlock_irqrestore(&priv->lock, flags);
	}
498

499
	memset(buf, 0, 7);
500
501
502
	i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
			    GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
503
	dev_dbg(&port->dev, "0xa1:0x21:0:0  %d - %7ph\n", i, buf);
Linus Torvalds's avatar
Linus Torvalds committed
504

505
	if (C_CRTSCTS(tty)) {
506
		if (spriv->type == HX)
507
			pl2303_vendor_write(0x0, 0x61, serial);
508
509
		else
			pl2303_vendor_write(0x0, 0x41, serial);
t.sefzick's avatar
t.sefzick committed
510
	} else {
511
		pl2303_vendor_write(0x0, 0x0, serial);
Linus Torvalds's avatar
Linus Torvalds committed
512
	}
513
514
515
516

	kfree(buf);
}

517
518
519
520
521
522
523
524
525
526
527
528
529
530
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);
531
	pl2303_set_control_lines(port, control);
532
533
534
}

static void pl2303_close(struct usb_serial_port *port)
535
{
Johan Hovold's avatar
Johan Hovold committed
536
	usb_serial_generic_close(port);
537
	usb_kill_urb(port->interrupt_in_urb);
Linus Torvalds's avatar
Linus Torvalds committed
538
539
}

540
static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
Linus Torvalds's avatar
Linus Torvalds committed
541
542
{
	struct usb_serial *serial = port->serial;
543
	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
Linus Torvalds's avatar
Linus Torvalds committed
544
545
	int result;

546
	if (spriv->type != HX) {
547
548
		usb_clear_halt(serial->dev, port->write_urb->pipe);
		usb_clear_halt(serial->dev, port->read_urb->pipe);
549
	} else {
Linus Torvalds's avatar
Linus Torvalds committed
550
		/* reset upstream data pipes */
551
552
		pl2303_vendor_write(8, 0, serial);
		pl2303_vendor_write(9, 0, serial);
Linus Torvalds's avatar
Linus Torvalds committed
553
554
555
	}

	/* Setup termios */
Alan Cox's avatar
Alan Cox committed
556
	if (tty)
557
		pl2303_set_termios(tty, port, NULL);
Linus Torvalds's avatar
Linus Torvalds committed
558

559
	result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
560
	if (result) {
561
		dev_err(&port->dev, "%s - failed submitting interrupt urb,"
562
			" error %d\n", __func__, result);
563
		return result;
Linus Torvalds's avatar
Linus Torvalds committed
564
	}
565

566
	result = usb_serial_generic_open(tty, port);
567
568
569
570
571
	if (result) {
		usb_kill_urb(port->interrupt_in_urb);
		return result;
	}

Linus Torvalds's avatar
Linus Torvalds committed
572
573
574
	return 0;
}

575
static int pl2303_tiocmset(struct tty_struct *tty,
576
			   unsigned int set, unsigned int clear)
Linus Torvalds's avatar
Linus Torvalds committed
577
{
Alan Cox's avatar
Alan Cox committed
578
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
579
580
581
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	u8 control;
582
	int ret;
583

584
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
585
586
587
588
589
590
591
592
593
	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;
594
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
595

596
597
598
	ret = pl2303_set_control_lines(port, control);
	if (ret)
		return usb_translate_errors(ret);
599

600
	return 0;
Linus Torvalds's avatar
Linus Torvalds committed
601
602
}

603
static int pl2303_tiocmget(struct tty_struct *tty)
Linus Torvalds's avatar
Linus Torvalds committed
604
{
Alan Cox's avatar
Alan Cox committed
605
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
606
607
608
609
610
611
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int mcr;
	unsigned int status;
	unsigned int result;

612
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
613
614
	mcr = priv->line_control;
	status = priv->line_status;
615
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
616
617
618
619
620
621
622
623

	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);

624
	dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
Linus Torvalds's avatar
Linus Torvalds committed
625
626
627
628

	return result;
}

629
630
631
632
633
634
635
636
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;
}

637
static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg)
Linus Torvalds's avatar
Linus Torvalds committed
638
{
639
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
640
641
642
643
644
645
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int prevstatus;
	unsigned int status;
	unsigned int changed;

646
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
647
	prevstatus = priv->line_status;
648
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
649
650

	while (1) {
651
		interruptible_sleep_on(&port->port.delta_msr_wait);
Linus Torvalds's avatar
Linus Torvalds committed
652
653
654
		/* see if a signal did it */
		if (signal_pending(current))
			return -ERESTARTSYS;
655

656
657
658
		if (port->serial->disconnected)
			return -EIO;

659
		spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
660
		status = priv->line_status;
661
662
		spin_unlock_irqrestore(&priv->lock, flags);

Alan Cox's avatar
Alan Cox committed
663
		changed = prevstatus ^ status;
664

Linus Torvalds's avatar
Linus Torvalds committed
665
666
667
		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
668
		    ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
Linus Torvalds's avatar
Linus Torvalds committed
669
670
671
672
673
674
675
676
			return 0;
		}
		prevstatus = status;
	}
	/* NOTREACHED */
	return 0;
}

677
static int pl2303_ioctl(struct tty_struct *tty,
678
			unsigned int cmd, unsigned long arg)
Linus Torvalds's avatar
Linus Torvalds committed
679
{
680
	struct serial_struct ser;
Alan Cox's avatar
Alan Cox committed
681
	struct usb_serial_port *port = tty->driver_data;
682
683

	dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd);
Linus Torvalds's avatar
Linus Torvalds committed
684
685

	switch (cmd) {
686
687
688
	case TIOCGSERIAL:
		memset(&ser, 0, sizeof ser);
		ser.type = PORT_16654;
689
		ser.line = port->minor;
690
		ser.port = port->port_number;
691
692
693
694
695
696
		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
697
	default:
698
		dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd);
Alan Cox's avatar
Alan Cox committed
699
		break;
Linus Torvalds's avatar
Linus Torvalds committed
700
701
702
703
	}
	return -ENOIOCTLCMD;
}

Alan Cox's avatar
Alan Cox committed
704
static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
Linus Torvalds's avatar
Linus Torvalds committed
705
{
Alan Cox's avatar
Alan Cox committed
706
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
707
708
709
710
711
712
713
714
	struct usb_serial *serial = port->serial;
	u16 state;
	int result;

	if (break_state == 0)
		state = BREAK_OFF;
	else
		state = BREAK_ON;
715
	dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
Alan Cox's avatar
Alan Cox committed
716
			state == BREAK_OFF ? "off" : "on");
Linus Torvalds's avatar
Linus Torvalds committed
717

718
719
720
	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
721
	if (result)
722
		dev_err(&port->dev, "error sending break = %d\n", result);
Linus Torvalds's avatar
Linus Torvalds committed
723
724
}

Flavio Leitner's avatar
Flavio Leitner committed
725
726
727
728
729
730
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);
731
	struct tty_struct *tty;
Flavio Leitner's avatar
Flavio Leitner committed
732
733
	unsigned long flags;
	u8 status_idx = UART_STATE;
734
	u8 length = UART_STATE + 1;
735
	u8 prev_line_status;
736
	u16 idv, idp;
Flavio Leitner's avatar
Flavio Leitner committed
737

738
739
740
741
742
743
744
745
746
747
748
749
	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
750
751
752
	}

	if (actual_length < length)
753
		return;
Flavio Leitner's avatar
Flavio Leitner committed
754

Alan Cox's avatar
Alan Cox committed
755
	/* Save off the uart status for others to look at */
Flavio Leitner's avatar
Flavio Leitner committed
756
	spin_lock_irqsave(&priv->lock, flags);
757
	prev_line_status = priv->line_status;
Flavio Leitner's avatar
Flavio Leitner committed
758
759
	priv->line_status = data[status_idx];
	spin_unlock_irqrestore(&priv->lock, flags);
760
761
	if (priv->line_status & UART_BREAK_ERROR)
		usb_serial_handle_break(port);
762
	wake_up_interruptible(&port->port.delta_msr_wait);
763
764
765
766
767
768
769
770

	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
771
}
Linus Torvalds's avatar
Linus Torvalds committed
772

773
static void pl2303_read_int_callback(struct urb *urb)
Linus Torvalds's avatar
Linus Torvalds committed
774
{
775
	struct usb_serial_port *port =  urb->context;
Linus Torvalds's avatar
Linus Torvalds committed
776
	unsigned char *data = urb->transfer_buffer;
Flavio Leitner's avatar
Flavio Leitner committed
777
	unsigned int actual_length = urb->actual_length;
778
779
	int status = urb->status;
	int retval;
Linus Torvalds's avatar
Linus Torvalds committed
780

781
	switch (status) {
Linus Torvalds's avatar
Linus Torvalds committed
782
783
784
785
786
787
788
	case 0:
		/* success */
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
789
790
		dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
			__func__, status);
Linus Torvalds's avatar
Linus Torvalds committed
791
792
		return;
	default:
793
794
		dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
			__func__, status);
Linus Torvalds's avatar
Linus Torvalds committed
795
796
797
		goto exit;
	}

798
	usb_serial_debug_data(&port->dev, __func__,
799
800
			      urb->actual_length, urb->transfer_buffer);

Flavio Leitner's avatar
Flavio Leitner committed
801
	pl2303_update_line_status(port, data, actual_length);
Linus Torvalds's avatar
Linus Torvalds committed
802
803

exit:
804
805
	retval = usb_submit_urb(urb, GFP_ATOMIC);
	if (retval)
806
		dev_err(&port->dev,
807
			"%s - usb_submit_urb failed with result %d\n",
808
			__func__, retval);
Linus Torvalds's avatar
Linus Torvalds committed
809
810
}

811
static void pl2303_process_read_urb(struct urb *urb)
812
{
813
814
	struct usb_serial_port *port = urb->context;
	struct pl2303_private *priv = usb_get_serial_port_data(port);
815
816
	unsigned char *data = urb->transfer_buffer;
	char tty_flag = TTY_NORMAL;
817
818
819
820
821
822
823
824
825
	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);
826
	wake_up_interruptible(&port->port.delta_msr_wait);
827
828
829
830

	if (!urb->actual_length)
		return;

831
832
833
834
835
836
837
838
839
	/* 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;

840
841
842
	if (tty_flag != TTY_NORMAL)
		dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__,
								tty_flag);
843
844
	/* overrun is special, not associated with a char */
	if (line_status & UART_OVERRUN_ERROR)
Jiri Slaby's avatar
Jiri Slaby committed
845
		tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
846

847
	if (port->port.console && port->sysrq) {
848
		for (i = 0; i < urb->actual_length; ++i)
849
			if (!usb_serial_handle_sysrq_char(port, data[i]))
Jiri Slaby's avatar
Jiri Slaby committed
850
851
				tty_insert_flip_char(&port->port, data[i],
						tty_flag);
852
	} else {
853
		tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
854
							urb->actual_length);
855
	}
Linus Torvalds's avatar
Linus Torvalds committed
856

Jiri Slaby's avatar
Jiri Slaby committed
857
	tty_flip_buffer_push(&port->port);
Linus Torvalds's avatar
Linus Torvalds committed
858
859
}

860
861
862
863
864
865
866
867
/* 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,
868
	.bulk_in_size =		256,
869
	.bulk_out_size =	256,
870
871
	.open =			pl2303_open,
	.close =		pl2303_close,
872
873
	.dtr_rts = 		pl2303_dtr_rts,
	.carrier_raised =	pl2303_carrier_raised,
874
875
876
877
878
	.ioctl =		pl2303_ioctl,
	.break_ctl =		pl2303_break_ctl,
	.set_termios =		pl2303_set_termios,
	.tiocmget =		pl2303_tiocmget,
	.tiocmset =		pl2303_tiocmset,
879
	.tiocmiwait =		pl2303_tiocmiwait,
880
	.process_read_urb =	pl2303_process_read_urb,
881
882
	.read_int_callback =	pl2303_read_int_callback,
	.attach =		pl2303_startup,
883
	.release =		pl2303_release,
884
885
	.port_probe =		pl2303_port_probe,
	.port_remove =		pl2303_port_remove,
886
};
Linus Torvalds's avatar
Linus Torvalds committed
887

888
889
890
891
static struct usb_serial_driver * const serial_drivers[] = {
	&pl2303_device, NULL
};

892
module_usb_serial_driver(serial_drivers, id_table);
Linus Torvalds's avatar
Linus Torvalds committed
893
894
895

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