pl2303.c 23.3 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
136
137
138
139
140
141
142
143
#define BREAK_ON			0xffff
#define BREAK_OFF			0x0000

#define GET_LINE_REQUEST_TYPE		0xa1
#define GET_LINE_REQUEST		0x21

#define VENDOR_WRITE_REQUEST_TYPE	0x40
#define VENDOR_WRITE_REQUEST		0x01

#define VENDOR_READ_REQUEST_TYPE	0xc0
#define VENDOR_READ_REQUEST		0x01

#define UART_STATE			0x08
#define UART_STATE_TRANSIENT_MASK	0x74
#define UART_DCD			0x01
#define UART_DSR			0x02
#define UART_BREAK_ERROR		0x04
#define UART_RING			0x08
#define UART_FRAME_ERROR		0x10
#define UART_PARITY_ERROR		0x20
#define UART_OVERRUN_ERROR		0x40
#define UART_CTS			0x80


enum pl2303_type {
	type_0,		/* don't know the difference between type 0 and */
	type_1,		/* type 1, until someone from prolific tells us... */
	HX,		/* HX version of the pl2303 chip */
};

struct pl2303_private {
	spinlock_t lock;
	wait_queue_head_t delta_msr_wait;
	u8 line_control;
	u8 line_status;
	enum pl2303_type type;
};

144
145
146
147
148
149
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);
150
151
152
	dev_dbg(&serial->dev->dev, "0x%x:0x%x:0x%x:0x%x  %d - %x\n",
		VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index,
		res, buf[0]);
153
154
155
156
157
158
159
160
161
	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);
162
163
164
	dev_dbg(&serial->dev->dev, "0x%x:0x%x:0x%x:0x%x  %d\n",
		VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index,
		res);
165
166
167
	return res;
}

168
static int pl2303_startup(struct usb_serial *serial)
Linus Torvalds's avatar
Linus Torvalds committed
169
170
171
{
	struct pl2303_private *priv;
	enum pl2303_type type = type_0;
172
	unsigned char *buf;
Linus Torvalds's avatar
Linus Torvalds committed
173
174
	int i;

175
176
177
178
	buf = kmalloc(10, GFP_KERNEL);
	if (buf == NULL)
		return -ENOMEM;

Linus Torvalds's avatar
Linus Torvalds committed
179
180
181
182
183
184
185
186
	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;
187
	dev_dbg(&serial->interface->dev, "device type: %d\n", type);
Linus Torvalds's avatar
Linus Torvalds committed
188
189

	for (i = 0; i < serial->num_ports; ++i) {
190
		priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
191
192
193
194
195
196
197
		if (!priv)
			goto cleanup;
		spin_lock_init(&priv->lock);
		init_waitqueue_head(&priv->delta_msr_wait);
		priv->type = type;
		usb_set_serial_port_data(serial->port[i], priv);
	}
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
216
217
	return 0;

cleanup:
218
	kfree(buf);
Alan Cox's avatar
Alan Cox committed
219
	for (--i; i >= 0; --i) {
Linus Torvalds's avatar
Linus Torvalds committed
220
221
222
223
224
225
226
		priv = usb_get_serial_port_data(serial->port[i]);
		kfree(priv);
		usb_set_serial_port_data(serial->port[i], NULL);
	}
	return -ENOMEM;
}

227
static int set_control_lines(struct usb_device *dev, u8 value)
Linus Torvalds's avatar
Linus Torvalds committed
228
229
{
	int retval;
Alan Cox's avatar
Alan Cox committed
230

231
232
233
	retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
				 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
				 value, 0, NULL, 0, 100);
234
235
	dev_dbg(&dev->dev, "%s - value = %d, retval = %d\n", __func__,
		value, retval);
Linus Torvalds's avatar
Linus Torvalds committed
236
237
238
	return retval;
}

Alan Cox's avatar
Alan Cox committed
239
240
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
241
242
243
244
245
246
247
248
249
{
	struct usb_serial *serial = port->serial;
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int cflag;
	unsigned char *buf;
	int baud;
	int i;
	u8 control;
250
251
252
253
254
255
	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
256

257
258
259
260
	/* 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 */

261
	if (!tty_termios_hw_change(&tty->termios, old_termios))
262
263
		return;

264
	cflag = tty->termios.c_cflag;
Linus Torvalds's avatar
Linus Torvalds committed
265

266
	buf = kzalloc(7, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
267
	if (!buf) {
268
		dev_err(&port->dev, "%s - out of memory.\n", __func__);
269
		/* Report back no change occurred */
270
		tty->termios = *old_termios;
Linus Torvalds's avatar
Linus Torvalds committed
271
272
273
		return;
	}

274
275
276
	i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
			    GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
277
	dev_dbg(&port->dev, "0xa1:0x21:0:0  %d - %x %x %x %x %x %x %x\n", i,
278
	    buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
Linus Torvalds's avatar
Linus Torvalds committed
279
280
281

	if (cflag & CSIZE) {
		switch (cflag & CSIZE) {
Alan Cox's avatar
Alan Cox committed
282
283
284
285
286
287
288
289
290
291
292
293
294
		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
295
		}
296
		dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
Linus Torvalds's avatar
Linus Torvalds committed
297
298
	}

299
300
301
302
303
	/* 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
304
	baud = tty_get_baud_rate(tty);
305
	dev_dbg(&port->dev, "baud requested = %d\n", baud);
Linus Torvalds's avatar
Linus Torvalds committed
306
	if (baud) {
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
		/* 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 */
			if (priv->type != HX)
				baud = 1228800;
			else if (baud > 6000000)
				baud = 6000000;
		}
331
		dev_dbg(&port->dev, "baud set = %d\n", baud);
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
		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
351
352
353
354
355
356
	}

	/* 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) {
357
358
359
360
361
		/* 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;
362
			dev_dbg(&port->dev, "stop bits = 1.5\n");
363
364
		} else {
			buf[4] = 2;
365
			dev_dbg(&port->dev, "stop bits = 2\n");
366
		}
Linus Torvalds's avatar
Linus Torvalds committed
367
368
	} else {
		buf[4] = 0;
369
		dev_dbg(&port->dev, "stop bits = 1\n");
Linus Torvalds's avatar
Linus Torvalds committed
370
371
372
373
374
375
376
377
378
	}

	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) {
379
380
			if (cflag & CMSPAR) {
				buf[5] = 3;
381
				dev_dbg(&port->dev, "parity = mark\n");
382
383
			} else {
				buf[5] = 1;
384
				dev_dbg(&port->dev, "parity = odd\n");
385
			}
Linus Torvalds's avatar
Linus Torvalds committed
386
		} else {
387
388
			if (cflag & CMSPAR) {
				buf[5] = 4;
389
				dev_dbg(&port->dev, "parity = space\n");
390
391
			} else {
				buf[5] = 2;
392
				dev_dbg(&port->dev, "parity = even\n");
393
			}
Linus Torvalds's avatar
Linus Torvalds committed
394
395
396
		}
	} else {
		buf[5] = 0;
397
		dev_dbg(&port->dev, "parity = none\n");
Linus Torvalds's avatar
Linus Torvalds committed
398
399
	}

400
401
402
	i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
			    SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
403
	dev_dbg(&port->dev, "0x21:0x20:0:0  %d\n", i);
Linus Torvalds's avatar
Linus Torvalds committed
404
405
406
407
408
409

	/* 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);
410
	else if ((old_termios->c_cflag & CBAUD) == B0)
Linus Torvalds's avatar
Linus Torvalds committed
411
412
413
414
415
416
417
418
		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);
	}
419

Linus Torvalds's avatar
Linus Torvalds committed
420
421
	buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;

422
423
424
	i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
			    GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
425
	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
426
427
428
429
	     buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);

	if (cflag & CRTSCTS) {
		if (priv->type == HX)
430
			pl2303_vendor_write(0x0, 0x61, serial);
Linus Torvalds's avatar
Linus Torvalds committed
431
		else
432
			pl2303_vendor_write(0x0, 0x41, serial);
t.sefzick's avatar
t.sefzick committed
433
	} else {
434
		pl2303_vendor_write(0x0, 0x0, serial);
Linus Torvalds's avatar
Linus Torvalds committed
435
	}
436

437
	/* Save resulting baud rate */
438
	if (baud)
Alan Cox's avatar
Alan Cox committed
439
		tty_encode_baud_rate(tty, baud, baud);
440

441
442
443
	kfree(buf);
}

444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
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)
462
{
Johan Hovold's avatar
Johan Hovold committed
463
	usb_serial_generic_close(port);
464
	usb_kill_urb(port->interrupt_in_urb);
Linus Torvalds's avatar
Linus Torvalds committed
465
466
}

467
static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
Linus Torvalds's avatar
Linus Torvalds committed
468
{
Alan Cox's avatar
Alan Cox committed
469
	struct ktermios tmp_termios;
Linus Torvalds's avatar
Linus Torvalds committed
470
471
472
473
	struct usb_serial *serial = port->serial;
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	int result;

474
475
476
	if (priv->type != HX) {
		usb_clear_halt(serial->dev, port->write_urb->pipe);
		usb_clear_halt(serial->dev, port->read_urb->pipe);
477
	} else {
Linus Torvalds's avatar
Linus Torvalds committed
478
		/* reset upstream data pipes */
479
480
		pl2303_vendor_write(8, 0, serial);
		pl2303_vendor_write(9, 0, serial);
Linus Torvalds's avatar
Linus Torvalds committed
481
482
483
	}

	/* Setup termios */
Alan Cox's avatar
Alan Cox committed
484
485
	if (tty)
		pl2303_set_termios(tty, port, &tmp_termios);
Linus Torvalds's avatar
Linus Torvalds committed
486

487
	result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
488
	if (result) {
489
		dev_err(&port->dev, "%s - failed submitting interrupt urb,"
490
			" error %d\n", __func__, result);
491
		return result;
Linus Torvalds's avatar
Linus Torvalds committed
492
	}
493

494
	result = usb_serial_generic_open(tty, port);
495
496
497
498
499
	if (result) {
		usb_kill_urb(port->interrupt_in_urb);
		return result;
	}

500
	port->port.drain_delay = 256;
Linus Torvalds's avatar
Linus Torvalds committed
501
502
503
	return 0;
}

504
static int pl2303_tiocmset(struct tty_struct *tty,
505
			   unsigned int set, unsigned int clear)
Linus Torvalds's avatar
Linus Torvalds committed
506
{
Alan Cox's avatar
Alan Cox committed
507
	struct usb_serial_port *port = tty->driver_data;
508
	struct usb_serial *serial = port->serial;
Linus Torvalds's avatar
Linus Torvalds committed
509
510
511
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	u8 control;
512
	int ret;
513

514
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
515
516
517
518
519
520
521
522
523
	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;
524
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
525

526
527
528
529
530
531
532
533
	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
534
535
}

536
static int pl2303_tiocmget(struct tty_struct *tty)
Linus Torvalds's avatar
Linus Torvalds committed
537
{
Alan Cox's avatar
Alan Cox committed
538
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
539
540
541
542
543
544
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int mcr;
	unsigned int status;
	unsigned int result;

545
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
546
547
	mcr = priv->line_control;
	status = priv->line_status;
548
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
549
550
551
552
553
554
555
556

	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);

557
	dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
Linus Torvalds's avatar
Linus Torvalds committed
558
559
560
561

	return result;
}

562
563
564
565
566
567
568
569
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
570
571
572
573
574
575
576
577
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;

578
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
579
	prevstatus = priv->line_status;
580
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
581
582
583
584
585
586

	while (1) {
		interruptible_sleep_on(&priv->delta_msr_wait);
		/* see if a signal did it */
		if (signal_pending(current))
			return -ERESTARTSYS;
587
588

		spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
589
		status = priv->line_status;
590
591
		spin_unlock_irqrestore(&priv->lock, flags);

Alan Cox's avatar
Alan Cox committed
592
		changed = prevstatus ^ status;
593

Linus Torvalds's avatar
Linus Torvalds committed
594
595
596
		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
597
		    ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
Linus Torvalds's avatar
Linus Torvalds committed
598
599
600
601
602
603
604
605
			return 0;
		}
		prevstatus = status;
	}
	/* NOTREACHED */
	return 0;
}

606
static int pl2303_ioctl(struct tty_struct *tty,
607
			unsigned int cmd, unsigned long arg)
Linus Torvalds's avatar
Linus Torvalds committed
608
{
609
	struct serial_struct ser;
Alan Cox's avatar
Alan Cox committed
610
	struct usb_serial_port *port = tty->driver_data;
611
612

	dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd);
Linus Torvalds's avatar
Linus Torvalds committed
613
614

	switch (cmd) {
615
616
617
618
619
620
621
622
623
624
625
626
	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
627
	case TIOCMIWAIT:
628
		dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__);
Alan Cox's avatar
Alan Cox committed
629
630
		return wait_modem_info(port, arg);
	default:
631
		dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd);
Alan Cox's avatar
Alan Cox committed
632
		break;
Linus Torvalds's avatar
Linus Torvalds committed
633
634
635
636
	}
	return -ENOIOCTLCMD;
}

Alan Cox's avatar
Alan Cox committed
637
static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
Linus Torvalds's avatar
Linus Torvalds committed
638
{
Alan Cox's avatar
Alan Cox committed
639
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
640
641
642
643
644
645
646
647
	struct usb_serial *serial = port->serial;
	u16 state;
	int result;

	if (break_state == 0)
		state = BREAK_OFF;
	else
		state = BREAK_ON;
648
	dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
Alan Cox's avatar
Alan Cox committed
649
			state == BREAK_OFF ? "off" : "on");
Linus Torvalds's avatar
Linus Torvalds committed
650

651
652
653
	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
654
	if (result)
655
		dev_err(&port->dev, "error sending break = %d\n", result);
Linus Torvalds's avatar
Linus Torvalds committed
656
657
}

658
static void pl2303_release(struct usb_serial *serial)
Linus Torvalds's avatar
Linus Torvalds committed
659
660
661
662
663
664
{
	int i;
	struct pl2303_private *priv;

	for (i = 0; i < serial->num_ports; ++i) {
		priv = usb_get_serial_port_data(serial->port[i]);
665
		kfree(priv);
666
	}
Linus Torvalds's avatar
Linus Torvalds committed
667
668
}

Flavio Leitner's avatar
Flavio Leitner committed
669
670
671
672
673
674
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);
675
	struct tty_struct *tty;
Flavio Leitner's avatar
Flavio Leitner committed
676
677
	unsigned long flags;
	u8 status_idx = UART_STATE;
678
	u8 length = UART_STATE + 1;
679
	u8 prev_line_status;
680
	u16 idv, idp;
Flavio Leitner's avatar
Flavio Leitner committed
681

682
683
684
685
686
687
688
689
690
691
692
693
	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
694
695
696
	}

	if (actual_length < length)
697
		return;
Flavio Leitner's avatar
Flavio Leitner committed
698

Alan Cox's avatar
Alan Cox committed
699
	/* Save off the uart status for others to look at */
Flavio Leitner's avatar
Flavio Leitner committed
700
	spin_lock_irqsave(&priv->lock, flags);
701
	prev_line_status = priv->line_status;
Flavio Leitner's avatar
Flavio Leitner committed
702
703
	priv->line_status = data[status_idx];
	spin_unlock_irqrestore(&priv->lock, flags);
704
705
	if (priv->line_status & UART_BREAK_ERROR)
		usb_serial_handle_break(port);
706
	wake_up_interruptible(&priv->delta_msr_wait);
707
708
709
710
711
712
713
714

	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
715
}
Linus Torvalds's avatar
Linus Torvalds committed
716

717
static void pl2303_read_int_callback(struct urb *urb)
Linus Torvalds's avatar
Linus Torvalds committed
718
{
719
	struct usb_serial_port *port =  urb->context;
Linus Torvalds's avatar
Linus Torvalds committed
720
	unsigned char *data = urb->transfer_buffer;
Flavio Leitner's avatar
Flavio Leitner committed
721
	unsigned int actual_length = urb->actual_length;
722
723
	int status = urb->status;
	int retval;
Linus Torvalds's avatar
Linus Torvalds committed
724

725
	switch (status) {
Linus Torvalds's avatar
Linus Torvalds committed
726
727
728
729
730
731
732
	case 0:
		/* success */
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
733
734
		dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
			__func__, status);
Linus Torvalds's avatar
Linus Torvalds committed
735
736
		return;
	default:
737
738
		dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
			__func__, status);
Linus Torvalds's avatar
Linus Torvalds committed
739
740
741
		goto exit;
	}

742
	usb_serial_debug_data(&port->dev, __func__,
743
744
			      urb->actual_length, urb->transfer_buffer);

Flavio Leitner's avatar
Flavio Leitner committed
745
	pl2303_update_line_status(port, data, actual_length);
Linus Torvalds's avatar
Linus Torvalds committed
746
747

exit:
748
749
	retval = usb_submit_urb(urb, GFP_ATOMIC);
	if (retval)
750
		dev_err(&port->dev,
751
			"%s - usb_submit_urb failed with result %d\n",
752
			__func__, retval);
Linus Torvalds's avatar
Linus Torvalds committed
753
754
}

755
static void pl2303_process_read_urb(struct urb *urb)
756
{
757
758
759
	struct usb_serial_port *port = urb->context;
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	struct tty_struct *tty;
760
761
	unsigned char *data = urb->transfer_buffer;
	char tty_flag = TTY_NORMAL;
762
763
764
765
766
767
768
769
770
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);
	wake_up_interruptible(&priv->delta_msr_wait);

	if (!urb->actual_length)
		return;

	tty = tty_port_tty_get(&port->port);
	if (!tty)
		return;

780
781
782
783
784
785
786
787
	/* 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;
788
	dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, tty_flag);
789
790
791
792

	/* overrun is special, not associated with a char */
	if (line_status & UART_OVERRUN_ERROR)
		tty_insert_flip_char(tty, 0, TTY_OVERRUN);
793

794
	if (port->port.console && port->sysrq) {
795
		for (i = 0; i < urb->actual_length; ++i)
796
			if (!usb_serial_handle_sysrq_char(port, data[i]))
797
				tty_insert_flip_char(tty, data[i], tty_flag);
798
799
800
	} else {
		tty_insert_flip_string_fixed_flag(tty, data, tty_flag,
							urb->actual_length);
801
	}
Linus Torvalds's avatar
Linus Torvalds committed
802

803
	tty_flip_buffer_push(tty);
Alan Cox's avatar
Alan Cox committed
804
	tty_kref_put(tty);
Linus Torvalds's avatar
Linus Torvalds committed
805
806
}

807
808
809
810
811
812
813
814
/* 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,
815
	.bulk_in_size =		256,
816
	.bulk_out_size =	256,
817
818
	.open =			pl2303_open,
	.close =		pl2303_close,
819
820
	.dtr_rts = 		pl2303_dtr_rts,
	.carrier_raised =	pl2303_carrier_raised,
821
822
823
824
825
	.ioctl =		pl2303_ioctl,
	.break_ctl =		pl2303_break_ctl,
	.set_termios =		pl2303_set_termios,
	.tiocmget =		pl2303_tiocmget,
	.tiocmset =		pl2303_tiocmset,
826
	.process_read_urb =	pl2303_process_read_urb,
827
828
	.read_int_callback =	pl2303_read_int_callback,
	.attach =		pl2303_startup,
829
	.release =		pl2303_release,
830
};
Linus Torvalds's avatar
Linus Torvalds committed
831

832
833
834
835
static struct usb_serial_driver * const serial_drivers[] = {
	&pl2303_device, NULL
};

836
module_usb_serial_driver(serial_drivers, id_table);
Linus Torvalds's avatar
Linus Torvalds committed
837
838
839

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