pl2303.c 24.2 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3
/*
 * Prolific PL2303 USB to serial adaptor driver
 *
4
 * Copyright (C) 2001-2007 Greg Kroah-Hartman (greg@kroah.com)
L
Linus Torvalds 已提交
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.
L
Linus Torvalds 已提交
12
 *
A
Alan Cox 已提交
13 14
 * See Documentation/usb/usb-serial.txt for more information on using this
 * driver
L
Linus Torvalds 已提交
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>
A
Alan Cox 已提交
29
#include <linux/uaccess.h>
L
Linus Torvalds 已提交
30
#include <linux/usb.h>
31
#include <linux/usb/serial.h>
L
Linus Torvalds 已提交
32 33 34 35 36 37 38 39 40 41 42
#include "pl2303.h"

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

static int debug;

#define PL2303_CLOSING_WAIT	(30*HZ)

43
static const struct usb_device_id id_table[] = {
L
Linus Torvalds 已提交
44 45
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
46
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
L
Linus Torvalds 已提交
47 48
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
M
Max Arnold 已提交
49
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
S
Steve Murphy 已提交
50
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
G
Greg Kroah-Hartman 已提交
51
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
52
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
53
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },
L
Linus Torvalds 已提交
54
	{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
55
	{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
L
Linus Torvalds 已提交
56 57 58 59 60
	{ 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) },
61
	{ USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
L
Linus Torvalds 已提交
62 63 64 65 66 67 68 69
	{ 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) },
70
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
L
Linus Torvalds 已提交
71
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
72
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
73
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
74
	{ USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
75
	{ USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
76 77
	{ USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
	{ USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
78
	{ USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
79
	{ USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
80
	{ USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
81
	{ USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
82
	{ USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
83
	{ USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
84
	{ USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
85
	{ USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
86
	{ USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
M
Matthew Arnold 已提交
87
	{ USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
88
	{ USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
89
	{ USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
90
	{ USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
91
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
92
	{ USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
93
	{ USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
94
	{ USB_DEVICE(WINCHIPHEAD_VENDOR_ID, WINCHIPHEAD_USBSER_PRODUCT_ID) },
L
Linus Torvalds 已提交
95 96 97
	{ }					/* Terminating entry */
};

98
MODULE_DEVICE_TABLE(usb, id_table);
L
Linus Torvalds 已提交
99 100 101 102 103 104

static struct usb_driver pl2303_driver = {
	.name =		"pl2303",
	.probe =	usb_serial_probe,
	.disconnect =	usb_serial_disconnect,
	.id_table =	id_table,
105 106
	.suspend =      usb_serial_suspend,
	.resume =       usb_serial_resume,
107
	.no_dynamic_id = 	1,
108
	.supports_autosuspend =	1,
L
Linus Torvalds 已提交
109 110 111 112 113 114 115 116 117 118 119
};

#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
A
Alan Cox 已提交
120
#define BREAK_REQUEST			0x23
L
Linus Torvalds 已提交
121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158
#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;
};

159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180
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);
	dbg("0x%x:0x%x:0x%x:0x%x  %d - %x", VENDOR_READ_REQUEST_TYPE,
			VENDOR_READ_REQUEST, value, index, res, buf[0]);
	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);
	dbg("0x%x:0x%x:0x%x:0x%x  %d", VENDOR_WRITE_REQUEST_TYPE,
			VENDOR_WRITE_REQUEST, value, index, res);
	return res;
}

181
static int pl2303_startup(struct usb_serial *serial)
L
Linus Torvalds 已提交
182 183 184
{
	struct pl2303_private *priv;
	enum pl2303_type type = type_0;
185
	unsigned char *buf;
L
Linus Torvalds 已提交
186 187
	int i;

188 189 190 191
	buf = kmalloc(10, GFP_KERNEL);
	if (buf == NULL)
		return -ENOMEM;

L
Linus Torvalds 已提交
192 193 194 195 196 197 198 199 200 201 202
	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;
	dbg("device type: %d", type);

	for (i = 0; i < serial->num_ports; ++i) {
203
		priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);
L
Linus Torvalds 已提交
204 205 206 207 208 209 210
		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);
	}
211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227

	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);
L
Linus Torvalds 已提交
228 229 230
	return 0;

cleanup:
231
	kfree(buf);
A
Alan Cox 已提交
232
	for (--i; i >= 0; --i) {
L
Linus Torvalds 已提交
233 234 235 236 237 238 239
		priv = usb_get_serial_port_data(serial->port[i]);
		kfree(priv);
		usb_set_serial_port_data(serial->port[i], NULL);
	}
	return -ENOMEM;
}

240
static int set_control_lines(struct usb_device *dev, u8 value)
L
Linus Torvalds 已提交
241 242
{
	int retval;
A
Alan Cox 已提交
243

244 245 246
	retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
				 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
				 value, 0, NULL, 0, 100);
247
	dbg("%s - value = %d, retval = %d", __func__, value, retval);
L
Linus Torvalds 已提交
248 249 250
	return retval;
}

A
Alan Cox 已提交
251 252
static void pl2303_set_termios(struct tty_struct *tty,
		struct usb_serial_port *port, struct ktermios *old_termios)
L
Linus Torvalds 已提交
253 254 255 256 257 258 259 260 261
{
	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;
262 263 264 265 266 267
	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;
L
Linus Torvalds 已提交
268

269
	dbg("%s -  port %d", __func__, port->number);
L
Linus Torvalds 已提交
270

A
Alan Cox 已提交
271 272 273 274
	/* 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 */

A
Alan Cox 已提交
275
	if (!tty_termios_hw_change(tty->termios, old_termios))
A
Alan Cox 已提交
276 277
		return;

A
Alan Cox 已提交
278
	cflag = tty->termios->c_cflag;
L
Linus Torvalds 已提交
279

280
	buf = kzalloc(7, GFP_KERNEL);
L
Linus Torvalds 已提交
281
	if (!buf) {
282
		dev_err(&port->dev, "%s - out of memory.\n", __func__);
283
		/* Report back no change occurred */
A
Alan Cox 已提交
284
		*tty->termios = *old_termios;
L
Linus Torvalds 已提交
285 286 287
		return;
	}

288 289 290 291 292
	i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
			    GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
	dbg("0xa1:0x21:0:0  %d - %x %x %x %x %x %x %x", i,
	    buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
L
Linus Torvalds 已提交
293 294 295

	if (cflag & CSIZE) {
		switch (cflag & CSIZE) {
A
Alan Cox 已提交
296 297 298 299 300 301 302 303 304 305 306 307 308
		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;
L
Linus Torvalds 已提交
309
		}
310
		dbg("%s - data bits = %d", __func__, buf[6]);
L
Linus Torvalds 已提交
311 312
	}

313 314 315 316 317
	/* 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)
	 */
A
Alan Cox 已提交
318
	baud = tty_get_baud_rate(tty);
319
	dbg("%s - baud requested = %d", __func__, baud);
L
Linus Torvalds 已提交
320
	if (baud) {
321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345
		/* 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;
		}
		dbg("%s - baud set = %d", __func__, baud);
346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364
		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;
		}
L
Linus Torvalds 已提交
365 366 367 368 369 370
	}

	/* 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) {
371 372 373 374 375 376 377 378 379 380
		/* 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;
			dbg("%s - stop bits = 1.5", __func__);
		} else {
			buf[4] = 2;
			dbg("%s - stop bits = 2", __func__);
		}
L
Linus Torvalds 已提交
381 382
	} else {
		buf[4] = 0;
383
		dbg("%s - stop bits = 1", __func__);
L
Linus Torvalds 已提交
384 385 386 387 388 389 390 391 392
	}

	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) {
393 394 395 396 397 398 399
			if (cflag & CMSPAR) {
				buf[5] = 3;
				dbg("%s - parity = mark", __func__);
			} else {
				buf[5] = 1;
				dbg("%s - parity = odd", __func__);
			}
L
Linus Torvalds 已提交
400
		} else {
401 402 403 404 405 406 407
			if (cflag & CMSPAR) {
				buf[5] = 4;
				dbg("%s - parity = space", __func__);
			} else {
				buf[5] = 2;
				dbg("%s - parity = even", __func__);
			}
L
Linus Torvalds 已提交
408 409 410
		}
	} else {
		buf[5] = 0;
411
		dbg("%s - parity = none", __func__);
L
Linus Torvalds 已提交
412 413
	}

414 415 416 417
	i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
			    SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
	dbg("0x21:0x20:0:0  %d", i);
L
Linus Torvalds 已提交
418 419 420 421 422 423 424 425 426 427 428 429 430 431 432

	/* 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);
	else
		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);
	}
433

L
Linus Torvalds 已提交
434 435
	buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;

436 437 438 439
	i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
			    GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
			    0, 0, buf, 7, 100);
	dbg("0xa1:0x21:0:0  %d - %x %x %x %x %x %x %x", i,
L
Linus Torvalds 已提交
440 441 442 443
	     buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);

	if (cflag & CRTSCTS) {
		if (priv->type == HX)
444
			pl2303_vendor_write(0x0, 0x61, serial);
L
Linus Torvalds 已提交
445
		else
446
			pl2303_vendor_write(0x0, 0x41, serial);
T
t.sefzick 已提交
447
	} else {
448
		pl2303_vendor_write(0x0, 0x0, serial);
L
Linus Torvalds 已提交
449
	}
450

451
	/* Save resulting baud rate */
452
	if (baud)
A
Alan Cox 已提交
453
		tty_encode_baud_rate(tty, baud, baud);
454

455 456 457
	kfree(buf);
}

458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475
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)
476
{
477
	dbg("%s - port %d", __func__, port->number);
478

J
Johan Hovold 已提交
479
	usb_serial_generic_close(port);
480
	usb_kill_urb(port->interrupt_in_urb);
L
Linus Torvalds 已提交
481 482
}

483
static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
L
Linus Torvalds 已提交
484
{
A
Alan Cox 已提交
485
	struct ktermios tmp_termios;
L
Linus Torvalds 已提交
486 487 488 489
	struct usb_serial *serial = port->serial;
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	int result;

490
	dbg("%s -  port %d", __func__, port->number);
L
Linus Torvalds 已提交
491

492 493 494
	if (priv->type != HX) {
		usb_clear_halt(serial->dev, port->write_urb->pipe);
		usb_clear_halt(serial->dev, port->read_urb->pipe);
495
	} else {
L
Linus Torvalds 已提交
496
		/* reset upstream data pipes */
497 498
		pl2303_vendor_write(8, 0, serial);
		pl2303_vendor_write(9, 0, serial);
L
Linus Torvalds 已提交
499 500 501
	}

	/* Setup termios */
A
Alan Cox 已提交
502 503
	if (tty)
		pl2303_set_termios(tty, port, &tmp_termios);
L
Linus Torvalds 已提交
504

505
	dbg("%s - submitting read urb", __func__);
506
	result = usb_serial_generic_submit_read_urb(port, GFP_KERNEL);
L
Linus Torvalds 已提交
507
	if (result) {
508
		pl2303_close(port);
L
Linus Torvalds 已提交
509 510 511
		return -EPROTO;
	}

512
	dbg("%s - submitting interrupt urb", __func__);
513
	result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
L
Linus Torvalds 已提交
514
	if (result) {
515
		dev_err(&port->dev, "%s - failed submitting interrupt urb,"
516
			" error %d\n", __func__, result);
517
		pl2303_close(port);
L
Linus Torvalds 已提交
518 519
		return -EPROTO;
	}
520
	port->port.drain_delay = 256;
L
Linus Torvalds 已提交
521 522 523
	return 0;
}

524
static int pl2303_tiocmset(struct tty_struct *tty,
525
			   unsigned int set, unsigned int clear)
L
Linus Torvalds 已提交
526
{
A
Alan Cox 已提交
527
	struct usb_serial_port *port = tty->driver_data;
L
Linus Torvalds 已提交
528 529 530 531
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	u8 control;

F
Flavio Leitner 已提交
532 533 534
	if (!usb_get_intfdata(port->serial->interface))
		return -ENODEV;

535
	spin_lock_irqsave(&priv->lock, flags);
L
Linus Torvalds 已提交
536 537 538 539 540 541 542 543 544
	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;
545
	spin_unlock_irqrestore(&priv->lock, flags);
L
Linus Torvalds 已提交
546

547
	return set_control_lines(port->serial->dev, control);
L
Linus Torvalds 已提交
548 549
}

550
static int pl2303_tiocmget(struct tty_struct *tty)
L
Linus Torvalds 已提交
551
{
A
Alan Cox 已提交
552
	struct usb_serial_port *port = tty->driver_data;
L
Linus Torvalds 已提交
553 554 555 556 557 558
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int mcr;
	unsigned int status;
	unsigned int result;

559
	dbg("%s (%d)", __func__, port->number);
L
Linus Torvalds 已提交
560

F
Flavio Leitner 已提交
561 562 563
	if (!usb_get_intfdata(port->serial->interface))
		return -ENODEV;

564
	spin_lock_irqsave(&priv->lock, flags);
L
Linus Torvalds 已提交
565 566
	mcr = priv->line_control;
	status = priv->line_status;
567
	spin_unlock_irqrestore(&priv->lock, flags);
L
Linus Torvalds 已提交
568 569 570 571 572 573 574 575

	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);

576
	dbg("%s - result = %x", __func__, result);
L
Linus Torvalds 已提交
577 578 579 580

	return result;
}

581 582 583 584 585 586 587 588
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;
}

L
Linus Torvalds 已提交
589 590 591 592 593 594 595 596
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;

597
	spin_lock_irqsave(&priv->lock, flags);
L
Linus Torvalds 已提交
598
	prevstatus = priv->line_status;
599
	spin_unlock_irqrestore(&priv->lock, flags);
L
Linus Torvalds 已提交
600 601 602 603 604 605

	while (1) {
		interruptible_sleep_on(&priv->delta_msr_wait);
		/* see if a signal did it */
		if (signal_pending(current))
			return -ERESTARTSYS;
606 607

		spin_lock_irqsave(&priv->lock, flags);
L
Linus Torvalds 已提交
608
		status = priv->line_status;
609 610
		spin_unlock_irqrestore(&priv->lock, flags);

A
Alan Cox 已提交
611
		changed = prevstatus ^ status;
612

L
Linus Torvalds 已提交
613 614 615
		if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
		    ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
		    ((arg & TIOCM_CD)  && (changed & UART_DCD)) ||
A
Alan Cox 已提交
616
		    ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
L
Linus Torvalds 已提交
617 618 619 620 621 622 623 624
			return 0;
		}
		prevstatus = status;
	}
	/* NOTREACHED */
	return 0;
}

625
static int pl2303_ioctl(struct tty_struct *tty,
626
			unsigned int cmd, unsigned long arg)
L
Linus Torvalds 已提交
627
{
628
	struct serial_struct ser;
A
Alan Cox 已提交
629
	struct usb_serial_port *port = tty->driver_data;
630
	dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);
L
Linus Torvalds 已提交
631 632

	switch (cmd) {
633 634 635 636 637 638 639 640 641 642 643 644
	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;

A
Alan Cox 已提交
645 646 647 648 649 650
	case TIOCMIWAIT:
		dbg("%s (%d) TIOCMIWAIT", __func__,  port->number);
		return wait_modem_info(port, arg);
	default:
		dbg("%s not supported = 0x%04x", __func__, cmd);
		break;
L
Linus Torvalds 已提交
651 652 653 654
	}
	return -ENOIOCTLCMD;
}

A
Alan Cox 已提交
655
static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
L
Linus Torvalds 已提交
656
{
A
Alan Cox 已提交
657
	struct usb_serial_port *port = tty->driver_data;
L
Linus Torvalds 已提交
658 659 660 661
	struct usb_serial *serial = port->serial;
	u16 state;
	int result;

662
	dbg("%s - port %d", __func__, port->number);
L
Linus Torvalds 已提交
663 664 665 666 667

	if (break_state == 0)
		state = BREAK_OFF;
	else
		state = BREAK_ON;
A
Alan Cox 已提交
668 669
	dbg("%s - turning break %s", __func__,
			state == BREAK_OFF ? "off" : "on");
L
Linus Torvalds 已提交
670

671 672 673
	result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
				 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
				 0, NULL, 0, 100);
L
Linus Torvalds 已提交
674
	if (result)
675
		dbg("%s - error sending break = %d", __func__, result);
L
Linus Torvalds 已提交
676 677
}

678
static void pl2303_release(struct usb_serial *serial)
L
Linus Torvalds 已提交
679 680 681 682
{
	int i;
	struct pl2303_private *priv;

683
	dbg("%s", __func__);
L
Linus Torvalds 已提交
684 685 686

	for (i = 0; i < serial->num_ports; ++i) {
		priv = usb_get_serial_port_data(serial->port[i]);
687
		kfree(priv);
688
	}
L
Linus Torvalds 已提交
689 690
}

F
Flavio Leitner 已提交
691 692 693 694 695 696
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);
697
	struct tty_struct *tty;
F
Flavio Leitner 已提交
698 699
	unsigned long flags;
	u8 status_idx = UART_STATE;
700
	u8 length = UART_STATE + 1;
701
	u8 prev_line_status;
702
	u16 idv, idp;
F
Flavio Leitner 已提交
703

704 705 706 707 708 709 710 711 712 713 714 715
	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;
		}
F
Flavio Leitner 已提交
716 717 718
	}

	if (actual_length < length)
719
		return;
F
Flavio Leitner 已提交
720

A
Alan Cox 已提交
721
	/* Save off the uart status for others to look at */
F
Flavio Leitner 已提交
722
	spin_lock_irqsave(&priv->lock, flags);
723
	prev_line_status = priv->line_status;
F
Flavio Leitner 已提交
724 725
	priv->line_status = data[status_idx];
	spin_unlock_irqrestore(&priv->lock, flags);
726 727
	if (priv->line_status & UART_BREAK_ERROR)
		usb_serial_handle_break(port);
728
	wake_up_interruptible(&priv->delta_msr_wait);
729 730 731 732 733 734 735 736

	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);
F
Flavio Leitner 已提交
737
}
L
Linus Torvalds 已提交
738

739
static void pl2303_read_int_callback(struct urb *urb)
L
Linus Torvalds 已提交
740
{
741
	struct usb_serial_port *port =  urb->context;
L
Linus Torvalds 已提交
742
	unsigned char *data = urb->transfer_buffer;
F
Flavio Leitner 已提交
743
	unsigned int actual_length = urb->actual_length;
744 745
	int status = urb->status;
	int retval;
L
Linus Torvalds 已提交
746

747
	dbg("%s (%d)", __func__, port->number);
L
Linus Torvalds 已提交
748

749
	switch (status) {
L
Linus Torvalds 已提交
750 751 752 753 754 755 756
	case 0:
		/* success */
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
757
		dbg("%s - urb shutting down with status: %d", __func__,
758
		    status);
L
Linus Torvalds 已提交
759 760
		return;
	default:
761
		dbg("%s - nonzero urb status received: %d", __func__,
762
		    status);
L
Linus Torvalds 已提交
763 764 765
		goto exit;
	}

766
	usb_serial_debug_data(debug, &port->dev, __func__,
767 768
			      urb->actual_length, urb->transfer_buffer);

F
Flavio Leitner 已提交
769
	pl2303_update_line_status(port, data, actual_length);
L
Linus Torvalds 已提交
770 771

exit:
772 773
	retval = usb_submit_urb(urb, GFP_ATOMIC);
	if (retval)
774 775
		dev_err(&urb->dev->dev,
			"%s - usb_submit_urb failed with result %d\n",
776
			__func__, retval);
L
Linus Torvalds 已提交
777 778
}

779
static void pl2303_process_read_urb(struct urb *urb)
780
{
781 782 783
	struct usb_serial_port *port = urb->context;
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	struct tty_struct *tty;
784 785
	unsigned char *data = urb->transfer_buffer;
	char tty_flag = TTY_NORMAL;
786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803
	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;

804 805 806 807 808 809 810 811 812 813 814 815 816
	/* 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;
	dbg("%s - tty_flag = %d", __func__, tty_flag);

	/* overrun is special, not associated with a char */
	if (line_status & UART_OVERRUN_ERROR)
		tty_insert_flip_char(tty, 0, TTY_OVERRUN);
817

818
	if (port->port.console && port->sysrq) {
819
		for (i = 0; i < urb->actual_length; ++i)
820
			if (!usb_serial_handle_sysrq_char(port, data[i]))
821
				tty_insert_flip_char(tty, data[i], tty_flag);
822 823 824
	} else {
		tty_insert_flip_string_fixed_flag(tty, data, tty_flag,
							urb->actual_length);
825
	}
L
Linus Torvalds 已提交
826

827
	tty_flip_buffer_push(tty);
A
Alan Cox 已提交
828
	tty_kref_put(tty);
L
Linus Torvalds 已提交
829 830
}

831 832 833 834 835 836 837
/* 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,
838
	.usb_driver = 		&pl2303_driver,
839
	.num_ports =		1,
840
	.bulk_in_size =		256,
841
	.bulk_out_size =	256,
842 843
	.open =			pl2303_open,
	.close =		pl2303_close,
844 845
	.dtr_rts = 		pl2303_dtr_rts,
	.carrier_raised =	pl2303_carrier_raised,
846 847 848 849 850
	.ioctl =		pl2303_ioctl,
	.break_ctl =		pl2303_break_ctl,
	.set_termios =		pl2303_set_termios,
	.tiocmget =		pl2303_tiocmget,
	.tiocmset =		pl2303_tiocmset,
851
	.process_read_urb =	pl2303_process_read_urb,
852 853
	.read_int_callback =	pl2303_read_int_callback,
	.attach =		pl2303_startup,
854
	.release =		pl2303_release,
855
};
L
Linus Torvalds 已提交
856

857
static int __init pl2303_init(void)
L
Linus Torvalds 已提交
858 859
{
	int retval;
860

L
Linus Torvalds 已提交
861 862 863 864 865 866
	retval = usb_serial_register(&pl2303_device);
	if (retval)
		goto failed_usb_serial_register;
	retval = usb_register(&pl2303_driver);
	if (retval)
		goto failed_usb_register;
867
	printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
L
Linus Torvalds 已提交
868 869 870 871 872 873 874
	return 0;
failed_usb_register:
	usb_serial_deregister(&pl2303_device);
failed_usb_serial_register:
	return retval;
}

875
static void __exit pl2303_exit(void)
L
Linus Torvalds 已提交
876
{
877 878
	usb_deregister(&pl2303_driver);
	usb_serial_deregister(&pl2303_device);
L
Linus Torvalds 已提交
879 880 881 882 883 884 885 886 887 888 889
}

module_init(pl2303_init);
module_exit(pl2303_exit);

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

module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");