pl2303.c 30.1 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 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55
#include "pl2303.h"

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

static int debug;

#define PL2303_CLOSING_WAIT	(30*HZ)

#define PL2303_BUF_SIZE		1024
#define PL2303_TMP_BUF_SIZE	1024

struct pl2303_buf {
	unsigned int	buf_size;
	char		*buf_buf;
	char		*buf_get;
	char		*buf_put;
};

static struct usb_device_id id_table [] = {
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
56
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
Linus Torvalds's avatar
Linus Torvalds committed
57 58
	{ 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
59
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
Steve Murphy's avatar
Steve Murphy committed
60
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
61
	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
Linus Torvalds's avatar
Linus Torvalds committed
62
	{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
63
	{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
Linus Torvalds's avatar
Linus Torvalds committed
64 65 66 67 68
	{ 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) },
69
	{ USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
Linus Torvalds's avatar
Linus Torvalds committed
70 71 72 73 74 75 76 77
	{ 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) },
78
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
Linus Torvalds's avatar
Linus Torvalds committed
79
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
80
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
81
	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
82
	{ USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
83
	{ USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
84 85
	{ USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
	{ USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
86
	{ USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
87
	{ USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
88
	{ USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
89
	{ USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
90
	{ USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
91
	{ USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
92
	{ USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
93
	{ USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
94
	{ USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
Matthew Arnold's avatar
Matthew Arnold committed
95
	{ USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
96
	{ USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
97
	{ USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
98
	{ USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
Linus Torvalds's avatar
Linus Torvalds committed
99 100 101
	{ }					/* Terminating entry */
};

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

static struct usb_driver pl2303_driver = {
	.name =		"pl2303",
	.probe =	usb_serial_probe,
	.disconnect =	usb_serial_disconnect,
	.id_table =	id_table,
109 110
	.suspend =      usb_serial_suspend,
	.resume =       usb_serial_resume,
111
	.no_dynamic_id = 	1,
112
	.supports_autosuspend =	1,
Linus Torvalds's avatar
Linus Torvalds committed
113 114 115 116 117 118 119 120 121 122 123
};

#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
124
#define BREAK_REQUEST			0x23
Linus Torvalds's avatar
Linus Torvalds committed
125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164
#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;
	struct pl2303_buf *buf;
	int write_urb_in_use;
	wait_queue_head_t delta_msr_wait;
	u8 line_control;
	u8 line_status;
	enum pl2303_type type;
};

165 166 167 168 169 170 171 172 173 174 175 176
/*
 * pl2303_buf_alloc
 *
 * Allocate a circular buffer and all associated memory.
 */
static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
{
	struct pl2303_buf *pb;

	if (size == 0)
		return NULL;

177
	pb = kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228
	if (pb == NULL)
		return NULL;

	pb->buf_buf = kmalloc(size, GFP_KERNEL);
	if (pb->buf_buf == NULL) {
		kfree(pb);
		return NULL;
	}

	pb->buf_size = size;
	pb->buf_get = pb->buf_put = pb->buf_buf;

	return pb;
}

/*
 * pl2303_buf_free
 *
 * Free the buffer and all associated memory.
 */
static void pl2303_buf_free(struct pl2303_buf *pb)
{
	if (pb) {
		kfree(pb->buf_buf);
		kfree(pb);
	}
}

/*
 * pl2303_buf_clear
 *
 * Clear out all data in the circular buffer.
 */
static void pl2303_buf_clear(struct pl2303_buf *pb)
{
	if (pb != NULL)
		pb->buf_get = pb->buf_put;
		/* equivalent to a get of all data available */
}

/*
 * pl2303_buf_data_avail
 *
 * Return the number of bytes of data available in the circular
 * buffer.
 */
static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
{
	if (pb == NULL)
		return 0;

Alan Cox's avatar
Alan Cox committed
229
	return (pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size;
230 231 232 233 234 235 236 237 238 239 240 241 242
}

/*
 * pl2303_buf_space_avail
 *
 * Return the number of bytes of space available in the circular
 * buffer.
 */
static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
{
	if (pb == NULL)
		return 0;

Alan Cox's avatar
Alan Cox committed
243
	return (pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size;
244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322
}

/*
 * pl2303_buf_put
 *
 * Copy data data from a user buffer and put it into the circular buffer.
 * Restrict to the amount of space available.
 *
 * Return the number of bytes copied.
 */
static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
				   unsigned int count)
{
	unsigned int len;

	if (pb == NULL)
		return 0;

	len  = pl2303_buf_space_avail(pb);
	if (count > len)
		count = len;

	if (count == 0)
		return 0;

	len = pb->buf_buf + pb->buf_size - pb->buf_put;
	if (count > len) {
		memcpy(pb->buf_put, buf, len);
		memcpy(pb->buf_buf, buf+len, count - len);
		pb->buf_put = pb->buf_buf + count - len;
	} else {
		memcpy(pb->buf_put, buf, count);
		if (count < len)
			pb->buf_put += count;
		else /* count == len */
			pb->buf_put = pb->buf_buf;
	}

	return count;
}

/*
 * pl2303_buf_get
 *
 * Get data from the circular buffer and copy to the given buffer.
 * Restrict to the amount of data available.
 *
 * Return the number of bytes copied.
 */
static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
				   unsigned int count)
{
	unsigned int len;

	if (pb == NULL)
		return 0;

	len = pl2303_buf_data_avail(pb);
	if (count > len)
		count = len;

	if (count == 0)
		return 0;

	len = pb->buf_buf + pb->buf_size - pb->buf_get;
	if (count > len) {
		memcpy(buf, pb->buf_get, len);
		memcpy(buf+len, pb->buf_buf, count - len);
		pb->buf_get = pb->buf_buf + count - len;
	} else {
		memcpy(buf, pb->buf_get, count);
		if (count < len)
			pb->buf_get += count;
		else /* count == len */
			pb->buf_get = pb->buf_buf;
	}

	return count;
}
Linus Torvalds's avatar
Linus Torvalds committed
323

324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345
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;
}

346
static int pl2303_startup(struct usb_serial *serial)
Linus Torvalds's avatar
Linus Torvalds committed
347 348 349
{
	struct pl2303_private *priv;
	enum pl2303_type type = type_0;
350
	unsigned char *buf;
Linus Torvalds's avatar
Linus Torvalds committed
351 352
	int i;

353 354 355 356
	buf = kmalloc(10, GFP_KERNEL);
	if (buf == NULL)
		return -ENOMEM;

Linus Torvalds's avatar
Linus Torvalds committed
357 358 359 360 361 362 363 364 365 366 367
	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) {
368
		priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
369 370 371 372 373 374 375 376 377 378 379 380
		if (!priv)
			goto cleanup;
		spin_lock_init(&priv->lock);
		priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
		if (priv->buf == NULL) {
			kfree(priv);
			goto cleanup;
		}
		init_waitqueue_head(&priv->delta_msr_wait);
		priv->type = type;
		usb_set_serial_port_data(serial->port[i], priv);
	}
381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397

	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
398 399 400
	return 0;

cleanup:
401
	kfree(buf);
Alan Cox's avatar
Alan Cox committed
402
	for (--i; i >= 0; --i) {
Linus Torvalds's avatar
Linus Torvalds committed
403 404 405 406 407 408 409 410
		priv = usb_get_serial_port_data(serial->port[i]);
		pl2303_buf_free(priv->buf);
		kfree(priv);
		usb_set_serial_port_data(serial->port[i], NULL);
	}
	return -ENOMEM;
}

411
static int set_control_lines(struct usb_device *dev, u8 value)
Linus Torvalds's avatar
Linus Torvalds committed
412 413
{
	int retval;
Alan Cox's avatar
Alan Cox committed
414

415 416 417
	retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
				 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
				 value, 0, NULL, 0, 100);
418
	dbg("%s - value = %d, retval = %d", __func__, value, retval);
Linus Torvalds's avatar
Linus Torvalds committed
419 420 421 422 423 424 425 426 427
	return retval;
}

static void pl2303_send(struct usb_serial_port *port)
{
	int count, result;
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;

428
	dbg("%s - port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
429 430 431 432 433 434 435 436 437

	spin_lock_irqsave(&priv->lock, flags);

	if (priv->write_urb_in_use) {
		spin_unlock_irqrestore(&priv->lock, flags);
		return;
	}

	count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
438
			       port->bulk_out_size);
Linus Torvalds's avatar
Linus Torvalds committed
439 440 441 442 443 444 445 446 447 448

	if (count == 0) {
		spin_unlock_irqrestore(&priv->lock, flags);
		return;
	}

	priv->write_urb_in_use = 1;

	spin_unlock_irqrestore(&priv->lock, flags);

449
	usb_serial_debug_data(debug, &port->dev, __func__, count,
450
			      port->write_urb->transfer_buffer);
Linus Torvalds's avatar
Linus Torvalds committed
451 452 453

	port->write_urb->transfer_buffer_length = count;
	port->write_urb->dev = port->serial->dev;
454
	result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
Linus Torvalds's avatar
Linus Torvalds committed
455
	if (result) {
456
		dev_err(&port->dev, "%s - failed submitting write urb,"
457
			" error %d\n", __func__, result);
Linus Torvalds's avatar
Linus Torvalds committed
458
		priv->write_urb_in_use = 0;
Alan Cox's avatar
Alan Cox committed
459
		/* TODO: reschedule pl2303_send */
Linus Torvalds's avatar
Linus Torvalds committed
460 461
	}

462
	usb_serial_port_softint(port);
Linus Torvalds's avatar
Linus Torvalds committed
463 464
}

Alan Cox's avatar
Alan Cox committed
465 466
static int pl2303_write(struct tty_struct *tty, struct usb_serial_port *port,
				const unsigned char *buf, int count)
467 468 469 470
{
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;

471
	dbg("%s - port %d, %d bytes", __func__, port->number, count);
472 473 474 475 476 477 478 479 480 481 482 483 484

	if (!count)
		return count;

	spin_lock_irqsave(&priv->lock, flags);
	count = pl2303_buf_put(priv->buf, buf, count);
	spin_unlock_irqrestore(&priv->lock, flags);

	pl2303_send(port);

	return count;
}

Alan Cox's avatar
Alan Cox committed
485
static int pl2303_write_room(struct tty_struct *tty)
Linus Torvalds's avatar
Linus Torvalds committed
486
{
Alan Cox's avatar
Alan Cox committed
487
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
488 489 490 491
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	int room = 0;
	unsigned long flags;

492
	dbg("%s - port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
493 494 495 496 497

	spin_lock_irqsave(&priv->lock, flags);
	room = pl2303_buf_space_avail(priv->buf);
	spin_unlock_irqrestore(&priv->lock, flags);

498
	dbg("%s - returns %d", __func__, room);
Linus Torvalds's avatar
Linus Torvalds committed
499 500 501
	return room;
}

Alan Cox's avatar
Alan Cox committed
502
static int pl2303_chars_in_buffer(struct tty_struct *tty)
Linus Torvalds's avatar
Linus Torvalds committed
503
{
Alan Cox's avatar
Alan Cox committed
504
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
505 506 507 508
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	int chars = 0;
	unsigned long flags;

509
	dbg("%s - port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
510 511 512 513 514

	spin_lock_irqsave(&priv->lock, flags);
	chars = pl2303_buf_data_avail(priv->buf);
	spin_unlock_irqrestore(&priv->lock, flags);

515
	dbg("%s - returns %d", __func__, chars);
Linus Torvalds's avatar
Linus Torvalds committed
516 517 518
	return chars;
}

Alan Cox's avatar
Alan Cox committed
519 520
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
521 522 523 524 525 526 527 528 529 530
{
	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;

531
	dbg("%s -  port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
532

533 534 535 536
	/* 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 */

Alan Cox's avatar
Alan Cox committed
537
	if (!tty_termios_hw_change(tty->termios, old_termios))
538 539
		return;

Alan Cox's avatar
Alan Cox committed
540
	cflag = tty->termios->c_cflag;
Linus Torvalds's avatar
Linus Torvalds committed
541

542
	buf = kzalloc(7, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
543
	if (!buf) {
544
		dev_err(&port->dev, "%s - out of memory.\n", __func__);
545
		/* Report back no change occurred */
Alan Cox's avatar
Alan Cox committed
546
		*tty->termios = *old_termios;
Linus Torvalds's avatar
Linus Torvalds committed
547 548 549
		return;
	}

550 551 552 553 554
	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]);
Linus Torvalds's avatar
Linus Torvalds committed
555 556 557

	if (cflag & CSIZE) {
		switch (cflag & CSIZE) {
Alan Cox's avatar
Alan Cox committed
558 559 560 561 562 563 564 565 566 567 568 569 570
		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
571
		}
572
		dbg("%s - data bits = %d", __func__, buf[6]);
Linus Torvalds's avatar
Linus Torvalds committed
573 574
	}

Alan Cox's avatar
Alan Cox committed
575
	baud = tty_get_baud_rate(tty);
576
	dbg("%s - baud = %d", __func__, baud);
Linus Torvalds's avatar
Linus Torvalds committed
577 578 579 580 581 582 583 584 585 586 587 588
	if (baud) {
		buf[0] = baud & 0xff;
		buf[1] = (baud >> 8) & 0xff;
		buf[2] = (baud >> 16) & 0xff;
		buf[3] = (baud >> 24) & 0xff;
	}

	/* 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) {
		buf[4] = 2;
589
		dbg("%s - stop bits = 2", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
590 591
	} else {
		buf[4] = 0;
592
		dbg("%s - stop bits = 1", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
593 594 595 596 597 598 599 600 601 602
	}

	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) {
			buf[5] = 1;
603
			dbg("%s - parity = odd", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
604 605
		} else {
			buf[5] = 2;
606
			dbg("%s - parity = even", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
607 608 609
		}
	} else {
		buf[5] = 0;
610
		dbg("%s - parity = none", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
611 612
	}

613 614 615 616
	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);
Linus Torvalds's avatar
Linus Torvalds committed
617 618 619 620 621 622 623 624 625 626 627 628 629 630 631

	/* 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);
	}
632

Linus Torvalds's avatar
Linus Torvalds committed
633 634
	buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;

635 636 637 638
	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,
Linus Torvalds's avatar
Linus Torvalds committed
639 640 641 642
	     buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);

	if (cflag & CRTSCTS) {
		if (priv->type == HX)
643
			pl2303_vendor_write(0x0, 0x61, serial);
Linus Torvalds's avatar
Linus Torvalds committed
644
		else
645
			pl2303_vendor_write(0x0, 0x41, serial);
t.sefzick's avatar
t.sefzick committed
646
	} else {
647
		pl2303_vendor_write(0x0, 0x0, serial);
Linus Torvalds's avatar
Linus Torvalds committed
648
	}
649

650 651
	/* FIXME: Need to read back resulting baud rate */
	if (baud)
Alan Cox's avatar
Alan Cox committed
652
		tty_encode_baud_rate(tty, baud, baud);
653

654 655 656
	kfree(buf);
}

657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674
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)
675 676 677 678
{
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;

679
	dbg("%s - port %d", __func__, port->number);
680 681 682 683 684 685 686

	spin_lock_irqsave(&priv->lock, flags);
	/* clear out any remaining data in the buffer */
	pl2303_buf_clear(priv->buf);
	spin_unlock_irqrestore(&priv->lock, flags);

	/* shutdown our urbs */
687
	dbg("%s - shutting down urbs", __func__);
688 689 690 691
	usb_kill_urb(port->write_urb);
	usb_kill_urb(port->read_urb);
	usb_kill_urb(port->interrupt_in_urb);

Linus Torvalds's avatar
Linus Torvalds committed
692 693
}

694
static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
Linus Torvalds's avatar
Linus Torvalds committed
695
{
Alan Cox's avatar
Alan Cox committed
696
	struct ktermios tmp_termios;
Linus Torvalds's avatar
Linus Torvalds committed
697 698 699 700
	struct usb_serial *serial = port->serial;
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	int result;

701
	dbg("%s -  port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
702

703 704 705
	if (priv->type != HX) {
		usb_clear_halt(serial->dev, port->write_urb->pipe);
		usb_clear_halt(serial->dev, port->read_urb->pipe);
706
	} else {
Linus Torvalds's avatar
Linus Torvalds committed
707
		/* reset upstream data pipes */
708 709
		pl2303_vendor_write(8, 0, serial);
		pl2303_vendor_write(9, 0, serial);
Linus Torvalds's avatar
Linus Torvalds committed
710 711 712
	}

	/* Setup termios */
Alan Cox's avatar
Alan Cox committed
713 714
	if (tty)
		pl2303_set_termios(tty, port, &tmp_termios);
Linus Torvalds's avatar
Linus Torvalds committed
715

716
	dbg("%s - submitting read urb", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
717
	port->read_urb->dev = serial->dev;
718
	result = usb_submit_urb(port->read_urb, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
719
	if (result) {
720
		dev_err(&port->dev, "%s - failed submitting read urb,"
721
			" error %d\n", __func__, result);
722
		pl2303_close(port);
Linus Torvalds's avatar
Linus Torvalds committed
723 724 725
		return -EPROTO;
	}

726
	dbg("%s - submitting interrupt urb", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
727
	port->interrupt_in_urb->dev = serial->dev;
728
	result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
729
	if (result) {
730
		dev_err(&port->dev, "%s - failed submitting interrupt urb,"
731
			" error %d\n", __func__, result);
732
		pl2303_close(port);
Linus Torvalds's avatar
Linus Torvalds committed
733 734
		return -EPROTO;
	}
735
	port->port.drain_delay = 256;
Linus Torvalds's avatar
Linus Torvalds committed
736 737 738
	return 0;
}

Alan Cox's avatar
Alan Cox committed
739
static int pl2303_tiocmset(struct tty_struct *tty, struct file *file,
740
			   unsigned int set, unsigned int clear)
Linus Torvalds's avatar
Linus Torvalds committed
741
{
Alan Cox's avatar
Alan Cox committed
742
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
743 744 745 746
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	u8 control;

747 748 749
	if (!usb_get_intfdata(port->serial->interface))
		return -ENODEV;

750
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
751 752 753 754 755 756 757 758 759
	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;
760
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
761

762
	return set_control_lines(port->serial->dev, control);
Linus Torvalds's avatar
Linus Torvalds committed
763 764
}

Alan Cox's avatar
Alan Cox committed
765
static int pl2303_tiocmget(struct tty_struct *tty, struct file *file)
Linus Torvalds's avatar
Linus Torvalds committed
766
{
Alan Cox's avatar
Alan Cox committed
767
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
768 769 770 771 772 773
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int mcr;
	unsigned int status;
	unsigned int result;

774
	dbg("%s (%d)", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
775

776 777 778
	if (!usb_get_intfdata(port->serial->interface))
		return -ENODEV;

779
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
780 781
	mcr = priv->line_control;
	status = priv->line_status;
782
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
783 784 785 786 787 788 789 790

	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);

791
	dbg("%s - result = %x", __func__, result);
Linus Torvalds's avatar
Linus Torvalds committed
792 793 794 795

	return result;
}

796 797 798 799 800 801 802 803
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
804 805 806 807 808 809 810 811
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;

812
	spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
813
	prevstatus = priv->line_status;
814
	spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
815 816 817 818 819 820

	while (1) {
		interruptible_sleep_on(&priv->delta_msr_wait);
		/* see if a signal did it */
		if (signal_pending(current))
			return -ERESTARTSYS;
821 822

		spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds's avatar
Linus Torvalds committed
823
		status = priv->line_status;
824 825
		spin_unlock_irqrestore(&priv->lock, flags);

Alan Cox's avatar
Alan Cox committed
826
		changed = prevstatus ^ status;
827

Linus Torvalds's avatar
Linus Torvalds committed
828 829 830
		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
831
		    ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
Linus Torvalds's avatar
Linus Torvalds committed
832 833 834 835 836 837 838 839
			return 0;
		}
		prevstatus = status;
	}
	/* NOTREACHED */
	return 0;
}

Alan Cox's avatar
Alan Cox committed
840
static int pl2303_ioctl(struct tty_struct *tty, struct file *file,
841
			unsigned int cmd, unsigned long arg)
Linus Torvalds's avatar
Linus Torvalds committed
842
{
Alan Cox's avatar
Alan Cox committed
843
	struct usb_serial_port *port = tty->driver_data;
844
	dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);
Linus Torvalds's avatar
Linus Torvalds committed
845 846

	switch (cmd) {
Alan Cox's avatar
Alan Cox committed
847 848 849 850 851 852
	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;
Linus Torvalds's avatar
Linus Torvalds committed
853 854 855 856
	}
	return -ENOIOCTLCMD;
}

Alan Cox's avatar
Alan Cox committed
857
static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
Linus Torvalds's avatar
Linus Torvalds committed
858
{
Alan Cox's avatar
Alan Cox committed
859
	struct usb_serial_port *port = tty->driver_data;
Linus Torvalds's avatar
Linus Torvalds committed
860 861 862 863
	struct usb_serial *serial = port->serial;
	u16 state;
	int result;

864
	dbg("%s - port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
865 866 867 868 869

	if (break_state == 0)
		state = BREAK_OFF;
	else
		state = BREAK_ON;
Alan Cox's avatar
Alan Cox committed
870 871
	dbg("%s - turning break %s", __func__,
			state == BREAK_OFF ? "off" : "on");
Linus Torvalds's avatar
Linus Torvalds committed
872

873 874 875
	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
876
	if (result)
877
		dbg("%s - error sending break = %d", __func__, result);
Linus Torvalds's avatar
Linus Torvalds committed
878 879
}

880
static void pl2303_release(struct usb_serial *serial)
Linus Torvalds's avatar
Linus Torvalds committed
881 882 883 884
{
	int i;
	struct pl2303_private *priv;

885
	dbg("%s", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
886 887 888 889 890 891 892

	for (i = 0; i < serial->num_ports; ++i) {
		priv = usb_get_serial_port_data(serial->port[i]);
		if (priv) {
			pl2303_buf_free(priv->buf);
			kfree(priv);
		}
893
	}
Linus Torvalds's avatar
Linus Torvalds committed
894 895
}

Flavio Leitner's avatar
Flavio Leitner committed
896 897 898 899 900 901 902 903
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);
	unsigned long flags;
	u8 status_idx = UART_STATE;
904
	u8 length = UART_STATE + 1;
905
	u16 idv, idp;
Flavio Leitner's avatar
Flavio Leitner committed
906

907 908 909 910 911 912 913 914 915 916 917 918
	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
919 920 921
	}

	if (actual_length < length)
922
		return;
Flavio Leitner's avatar
Flavio Leitner committed
923

Alan Cox's avatar
Alan Cox committed
924
	/* Save off the uart status for others to look at */
Flavio Leitner's avatar
Flavio Leitner committed
925 926 927
	spin_lock_irqsave(&priv->lock, flags);
	priv->line_status = data[status_idx];
	spin_unlock_irqrestore(&priv->lock, flags);
928 929
	if (priv->line_status & UART_BREAK_ERROR)
		usb_serial_handle_break(port);
930
	wake_up_interruptible(&priv->delta_msr_wait);
Flavio Leitner's avatar
Flavio Leitner committed
931
}
Linus Torvalds's avatar
Linus Torvalds committed
932

933
static void pl2303_read_int_callback(struct urb *urb)
Linus Torvalds's avatar
Linus Torvalds committed
934
{
935
	struct usb_serial_port *port =  urb->context;
Linus Torvalds's avatar
Linus Torvalds committed
936
	unsigned char *data = urb->transfer_buffer;
Flavio Leitner's avatar
Flavio Leitner committed
937
	unsigned int actual_length = urb->actual_length;
938 939
	int status = urb->status;
	int retval;
Linus Torvalds's avatar
Linus Torvalds committed
940

941
	dbg("%s (%d)", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
942

943
	switch (status) {
Linus Torvalds's avatar
Linus Torvalds committed
944 945 946 947 948 949 950
	case 0:
		/* success */
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
951
		dbg("%s - urb shutting down with status: %d", __func__,
952
		    status);
Linus Torvalds's avatar
Linus Torvalds committed
953 954
		return;
	default:
955
		dbg("%s - nonzero urb status received: %d", __func__,
956
		    status);
Linus Torvalds's avatar
Linus Torvalds committed
957 958 959
		goto exit;
	}

960
	usb_serial_debug_data(debug, &port->dev, __func__,
961 962
			      urb->actual_length, urb->transfer_buffer);

Flavio Leitner's avatar
Flavio Leitner committed
963
	pl2303_update_line_status(port, data, actual_length);
Linus Torvalds's avatar
Linus Torvalds committed
964 965

exit:
966 967
	retval = usb_submit_urb(urb, GFP_ATOMIC);
	if (retval)
968 969
		dev_err(&urb->dev->dev,
			"%s - usb_submit_urb failed with result %d\n",
970
			__func__, retval);
Linus Torvalds's avatar
Linus Torvalds committed
971 972
}

973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003
static void pl2303_push_data(struct tty_struct *tty,
		struct usb_serial_port *port, struct urb *urb,
		u8 line_status)
{
	unsigned char *data = urb->transfer_buffer;
	/* get tty_flag from status */
	char tty_flag = TTY_NORMAL;
	/* 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);

	tty_buffer_request_room(tty, urb->actual_length + 1);
	/* overrun is special, not associated with a char */
	if (line_status & UART_OVERRUN_ERROR)
		tty_insert_flip_char(tty, 0, TTY_OVERRUN);
	if (port->console && port->sysrq) {
		int i;
		for (i = 0; i < urb->actual_length; ++i)
			if (!usb_serial_handle_sysrq_char(tty, port, data[i]))
				tty_insert_flip_char(tty, data[i], tty_flag);
	} else
		tty_insert_flip_string(tty, data, urb->actual_length);
	tty_flip_buffer_push(tty);
}

1004
static void pl2303_read_bulk_callback(struct urb *urb)
Linus Torvalds's avatar
Linus Torvalds committed
1005
{
1006
	struct usb_serial_port *port =  urb->context;
Linus Torvalds's avatar
Linus Torvalds committed
1007 1008 1009 1010
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	struct tty_struct *tty;
	unsigned long flags;
	int result;
1011 1012
	int status = urb->status;
	u8 line_status;
Linus Torvalds's avatar
Linus Torvalds committed
1013

1014
	dbg("%s - port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
1015

1016
	if (status) {
1017
		dbg("%s - urb status = %d", __func__, status);
Alan Cox's avatar
Alan Cox committed
1018
		if (!port->port.count) {
1019
			dbg("%s - port is closed, exiting.", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
1020 1021
			return;
		}
1022
		if (status == -EPROTO) {
1023 1024 1025
			/* PL2303 mysteriously fails with -EPROTO reschedule
			 * the read */
			dbg("%s - caught -EPROTO, resubmitting the urb",
1026
			    __func__);
Linus Torvalds's avatar
Linus Torvalds committed
1027 1028 1029
			urb->dev = port->serial->dev;
			result = usb_submit_urb(urb, GFP_ATOMIC);
			if (result)
1030 1031
				dev_err(&urb->dev->dev, "%s - failed"
					" resubmitting read urb, error %d\n",
1032
					__func__, result);
Linus Torvalds's avatar
Linus Torvalds committed
1033 1034
			return;
		}
1035
		dbg("%s - unable to handle the error, exiting.", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
1036 1037 1038
		return;
	}

1039
	usb_serial_debug_data(debug, &port->dev, __func__,
1040
			      urb->actual_length, urb->transfer_buffer);
Linus Torvalds's avatar
Linus Torvalds committed
1041 1042

	spin_lock_irqsave(&priv->lock, flags);
1043
	line_status = priv->line_status;
Linus Torvalds's avatar
Linus Torvalds committed
1044 1045
	priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
	spin_unlock_irqrestore(&priv->lock, flags);
1046
	wake_up_interruptible(&priv->delta_msr_wait);
Linus Torvalds's avatar
Linus Torvalds committed
1047

Alan Cox's avatar
Alan Cox committed
1048
	tty = tty_port_tty_get(&port->port);
Linus Torvalds's avatar
Linus Torvalds committed
1049
	if (tty && urb->actual_length) {
1050
		pl2303_push_data(tty, port, urb, line_status);
Linus Torvalds's avatar
Linus Torvalds committed
1051
	}
Alan Cox's avatar
Alan Cox committed
1052
	tty_kref_put(tty);
Linus Torvalds's avatar
Linus Torvalds committed
1053
	/* Schedule the next read _if_ we are still open */
Alan Cox's avatar
Alan Cox committed
1054
	if (port->port.count) {
Linus Torvalds's avatar
Linus Torvalds committed
1055 1056 1057
		urb->dev = port->serial->dev;
		result = usb_submit_urb(urb, GFP_ATOMIC);
		if (result)
1058
			dev_err(&urb->dev->dev, "%s - failed resubmitting"
1059
				" read urb, error %d\n", __func__, result);
Linus Torvalds's avatar
Linus Torvalds committed
1060 1061 1062 1063 1064
	}

	return;
}

1065
static void pl2303_write_bulk_callback(struct urb *urb)
Linus Torvalds's avatar
Linus Torvalds committed
1066
{
1067
	struct usb_serial_port *port =  urb->context;
Linus Torvalds's avatar
Linus Torvalds committed
1068 1069
	struct pl2303_private *priv = usb_get_serial_port_data(port);
	int result;
1070
	int status = urb->status;
Linus Torvalds's avatar
Linus Torvalds committed
1071

1072
	dbg("%s - port %d", __func__, port->number);
Linus Torvalds's avatar
Linus Torvalds committed
1073

1074
	switch (status) {
Linus Torvalds's avatar
Linus Torvalds committed
1075 1076 1077 1078 1079 1080 1081
	case 0:
		/* success */
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
1082
		dbg("%s - urb shutting down with status: %d", __func__,
1083
		    status);
Linus Torvalds's avatar
Linus Torvalds committed
1084 1085 1086 1087
		priv->write_urb_in_use = 0;
		return;
	default:
		/* error in the urb, so we have to resubmit it */
1088 1089
		dbg("%s - Overflow in write", __func__);
		dbg("%s - nonzero write bulk status received: %d", __func__,
1090
		    status);
Linus Torvalds's avatar
Linus Torvalds committed
1091 1092
		port->write_urb->transfer_buffer_length = 1;
		port->write_urb->dev = port->serial->dev;
1093
		result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
Linus Torvalds's avatar
Linus Torvalds committed
1094
		if (result)
1095
			dev_err(&urb->dev->dev, "%s - failed resubmitting write"
1096
				" urb, error %d\n", __func__, result);
Linus Torvalds's avatar
Linus Torvalds committed
1097 1098 1099 1100 1101 1102 1103 1104 1105 1106
		else
			return;
	}

	priv->write_urb_in_use = 0;

	/* send any buffered data */
	pl2303_send(port);
}

1107 1108 1109 1110 1111 1112 1113
/* 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,
1114
	.usb_driver = 		&pl2303_driver,
1115 1116 1117
	.num_ports =		1,
	.open =			pl2303_open,
	.close =		pl2303_close,
1118 1119
	.dtr_rts = 		pl2303_dtr_rts,
	.carrier_raised =	pl2303_carrier_raised,
1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131
	.write =		pl2303_write,
	.ioctl =		pl2303_ioctl,
	.break_ctl =		pl2303_break_ctl,
	.set_termios =		pl2303_set_termios,
	.tiocmget =		pl2303_tiocmget,
	.tiocmset =		pl2303_tiocmset,
	.read_bulk_callback =	pl2303_read_bulk_callback,
	.read_int_callback