[GITLAB] - A technical upgrade is planned on Thursday the 1st of July at noon on our GITLAB server.

ark3116.c 12.2 KB
Newer Older
1
/*
2 3 4
 * Copyright (C) 2006
 *   Simon Schulz (ark3116_driver <at> auctionant.de)
 *
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
 * ark3116
 * - implements a driver for the arkmicro ark3116 chipset (vendor=0x6547,
 *   productid=0x0232) (used in a datacable called KQ-U8A)
 *
 * - based on code by krisfx -> thanks !!
 *   (see http://www.linuxquestions.org/questions/showthread.php?p=2184457#post2184457)
 *
 *  - based on logs created by usbsnoopy
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/tty.h>
#include <linux/module.h>
#include <linux/usb.h>
25
#include <linux/usb/serial.h>
26 27
#include <linux/serial.h>
#include <asm/uaccess.h>
28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384


static int debug;

static struct usb_device_id id_table [] = {
	{ USB_DEVICE(0x6547, 0x0232) },
	{ },
};
MODULE_DEVICE_TABLE(usb, id_table);

struct ark3116_private {
	spinlock_t lock;
	u8 termios_initialized;
};

static inline void ARK3116_SND(struct usb_serial *serial, int seq,
			       __u8 request, __u8 requesttype,
			       __u16 value, __u16 index)
{
	int result;
	result = usb_control_msg(serial->dev,
				 usb_sndctrlpipe(serial->dev,0),
				 request, requesttype, value, index,
				 NULL,0x00, 1000);
	dbg("%03d > ok",seq);
}

static inline void ARK3116_RCV(struct usb_serial *serial, int seq,
			       __u8 request, __u8 requesttype,
			       __u16 value, __u16 index, __u8 expected,
			       char *buf)
{
	int result;
	result = usb_control_msg(serial->dev,
			      usb_rcvctrlpipe(serial->dev,0),
			      request, requesttype, value, index,
			      buf, 0x0000001, 1000);
	if (result)
		dbg("%03d < %d bytes [0x%02X]",seq, result, buf[0]);
	else
		dbg("%03d < 0 bytes", seq);
}


static inline void ARK3116_RCV_QUIET(struct usb_serial *serial,
				     __u8 request, __u8 requesttype,
				     __u16 value, __u16 index, char *buf)
{
	usb_control_msg(serial->dev,
			usb_rcvctrlpipe(serial->dev,0),
			request, requesttype, value, index,
			buf, 0x0000001, 1000);
}


static int ark3116_attach(struct usb_serial *serial)
{
	char *buf;
	struct ark3116_private *priv;
	int i;

	for (i = 0; i < serial->num_ports; ++i) {
		priv = kmalloc (sizeof (struct ark3116_private), GFP_KERNEL);
		if (!priv)
			goto cleanup;
		memset (priv, 0x00, sizeof (struct ark3116_private));
		spin_lock_init(&priv->lock);

		usb_set_serial_port_data(serial->port[i], priv);
	}

	buf = kmalloc(1, GFP_KERNEL);
	if (!buf) {
		dbg("error kmalloc -> out of mem ?");
		goto cleanup;
	}

	/* 3 */
	ARK3116_SND(serial, 3,0xFE,0x40,0x0008,0x0002);
	ARK3116_SND(serial, 4,0xFE,0x40,0x0008,0x0001);
	ARK3116_SND(serial, 5,0xFE,0x40,0x0000,0x0008);
	ARK3116_SND(serial, 6,0xFE,0x40,0x0000,0x000B);

	/* <-- seq7 */
	ARK3116_RCV(serial, 7,0xFE,0xC0,0x0000,0x0003, 0x00, buf);
	ARK3116_SND(serial, 8,0xFE,0x40,0x0080,0x0003);
	ARK3116_SND(serial, 9,0xFE,0x40,0x001A,0x0000);
	ARK3116_SND(serial,10,0xFE,0x40,0x0000,0x0001);
	ARK3116_SND(serial,11,0xFE,0x40,0x0000,0x0003);

	/* <-- seq12 */
	ARK3116_RCV(serial,12,0xFE,0xC0,0x0000,0x0004, 0x00, buf);
	ARK3116_SND(serial,13,0xFE,0x40,0x0000,0x0004);

	/* 14 */
	ARK3116_RCV(serial,14,0xFE,0xC0,0x0000,0x0004, 0x00, buf);
	ARK3116_SND(serial,15,0xFE,0x40,0x0000,0x0004);

	/* 16 */
	ARK3116_RCV(serial,16,0xFE,0xC0,0x0000,0x0004, 0x00, buf);
	/* --> seq17 */
	ARK3116_SND(serial,17,0xFE,0x40,0x0001,0x0004);

	/* <-- seq18 */
	ARK3116_RCV(serial,18,0xFE,0xC0,0x0000,0x0004, 0x01, buf);

	/* --> seq19 */
	ARK3116_SND(serial,19,0xFE,0x40,0x0003,0x0004);


	/* <-- seq20 */
	/* seems like serial port status info (RTS, CTS,...) */
	/* returns modem control line status ?! */
	ARK3116_RCV(serial,20,0xFE,0xC0,0x0000,0x0006, 0xFF, buf);

	/* set 9600 baud & do some init ?! */
	ARK3116_SND(serial,147,0xFE,0x40,0x0083,0x0003);
	ARK3116_SND(serial,148,0xFE,0x40,0x0038,0x0000);
	ARK3116_SND(serial,149,0xFE,0x40,0x0001,0x0001);
	ARK3116_SND(serial,150,0xFE,0x40,0x0003,0x0003);
	ARK3116_RCV(serial,151,0xFE,0xC0,0x0000,0x0004,0x03, buf);
	ARK3116_SND(serial,152,0xFE,0x40,0x0000,0x0003);
	ARK3116_RCV(serial,153,0xFE,0xC0,0x0000,0x0003,0x00, buf);
	ARK3116_SND(serial,154,0xFE,0x40,0x0003,0x0003);

	kfree(buf);
	return(0);

cleanup:
	for (--i; i>=0; --i)
		usb_set_serial_port_data(serial->port[i], NULL);
	return -ENOMEM;
}

static void ark3116_set_termios(struct usb_serial_port *port,
				struct termios *old_termios)
{
	struct usb_serial *serial = port->serial;
	struct ark3116_private *priv = usb_get_serial_port_data(port);
	unsigned int cflag = port->tty->termios->c_cflag;
	unsigned long flags;
	int baud;
	int ark3116_baud;
	char *buf;
	char config;

	config = 0;

	dbg("%s - port %d", __FUNCTION__, port->number);

	if ((!port->tty) || (!port->tty->termios)) {
		dbg("%s - no tty structures", __FUNCTION__);
		return;
	}

	spin_lock_irqsave(&priv->lock, flags);
	if (!priv->termios_initialized) {
		*(port->tty->termios) = tty_std_termios;
		port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
		priv->termios_initialized = 1;
	}
	spin_unlock_irqrestore(&priv->lock, flags);

	cflag = port->tty->termios->c_cflag;

	/* check that they really want us to change something: */
	if (old_termios) {
		if ((cflag == old_termios->c_cflag) &&
		    (RELEVANT_IFLAG(port->tty->termios->c_iflag) ==
		     RELEVANT_IFLAG(old_termios->c_iflag))) {
			dbg("%s - nothing to change...", __FUNCTION__);
			return;
		}
	}

	buf = kmalloc(1, GFP_KERNEL);
	if (!buf) {
		dbg("error kmalloc");
		return;
	}

	/* set data bit count (8/7/6/5) */
	if (cflag & CSIZE){
		switch (cflag & CSIZE){
		case CS5:
			config |= 0x00;
			dbg("setting CS5");
			break;
		case CS6:
			config |= 0x01;
			dbg("setting CS6");
			break;
		case CS7:
			config |= 0x02;
			dbg("setting CS7");
			break;
		default:
			err ("CSIZE was set but not CS5-CS8, using CS8!");
		case CS8:
			config |= 0x03;
			dbg("setting CS8");
			break;
		}
	}

	/* set parity (NONE,EVEN,ODD) */
	if (cflag & PARENB){
		if (cflag & PARODD) {
			config |= 0x08;
			dbg("setting parity to ODD");
		} else {
			config |= 0x18;
			dbg("setting parity to EVEN");
		}
	} else {
		dbg("setting parity to NONE");
	}

	/* SET STOPBIT (1/2) */
	if (cflag & CSTOPB) {
		config |= 0x04;
		dbg ("setting 2 stop bits");
	} else {
		dbg ("setting 1 stop bit");
	}


	/* set baudrate: */
	baud = 0;
	switch (cflag & CBAUD){
		case B0:
			err("can't set 0baud, using 9600 instead");
			break;
		case B75:	baud = 75;	break;
		case B150:	baud = 150;	break;
		case B300:	baud = 300;	break;
		case B600:	baud = 600;	break;
		case B1200:	baud = 1200;	break;
		case B1800:	baud = 1800;	break;
		case B2400:	baud = 2400;	break;
		case B4800:	baud = 4800;	break;
		case B9600:	baud = 9600;	break;
		case B19200:	baud = 19200;	break;
		case B38400:	baud = 38400;	break;
		case B57600:	baud = 57600;	break;
		case B115200:	baud = 115200;	break;
		case B230400:	baud = 230400;	break;
		case B460800:	baud = 460800;	break;
		default:
			dbg("does not support the baudrate requested (fix it)");
			break;
	}

	/* set 9600 as default (if given baudrate is invalid for example) */
	if (baud == 0)
		baud = 9600;

	/*
	 * found by try'n'error, be careful, maybe there are other options
	 * for multiplicator etc!
	 */
	if (baud == 460800)
		/* strange, for 460800 the formula is wrong
		 * (dont use round(), then 9600baud is wrong) */
		ark3116_baud = 7;
	else
		ark3116_baud = 3000000 / baud;

	/* ? */
	ARK3116_RCV(serial,0,0xFE,0xC0,0x0000,0x0003, 0x03, buf);
	/* offset = buf[0]; */
	/* offset = 0x03; */
	/* dbg("using 0x%04X as target for 0x0003:",0x0080+offset); */


	/* set baudrate */
	dbg("setting baudrate to %d (->reg=%d)",baud,ark3116_baud);
	ARK3116_SND(serial,147,0xFE,0x40,0x0083,0x0003);
	ARK3116_SND(serial,148,0xFE,0x40,(ark3116_baud & 0x00FF)   ,0x0000);
	ARK3116_SND(serial,149,0xFE,0x40,(ark3116_baud & 0xFF00)>>8,0x0001);
	ARK3116_SND(serial,150,0xFE,0x40,0x0003,0x0003);

	/* ? */
	ARK3116_RCV(serial,151,0xFE,0xC0,0x0000,0x0004,0x03, buf);
	ARK3116_SND(serial,152,0xFE,0x40,0x0000,0x0003);

	/* set data bit count, stop bit count & parity: */
	dbg("updating bit count, stop bit or parity (cfg=0x%02X)", config);
	ARK3116_RCV(serial,153,0xFE,0xC0,0x0000,0x0003,0x00, buf);
	ARK3116_SND(serial,154,0xFE,0x40,config,0x0003);

	if (cflag & CRTSCTS)
		dbg("CRTSCTS not supported by chipset ?!");

	/* TEST ARK3116_SND(154,0xFE,0x40,0xFFFF, 0x0006); */

	kfree(buf);
	return;
}

static int ark3116_open(struct usb_serial_port *port, struct file *filp)
{
	struct termios tmp_termios;
	struct usb_serial *serial = port->serial;
	char *buf;
	int result = 0;

	dbg("%s -  port %d", __FUNCTION__, port->number);

	buf = kmalloc(1, GFP_KERNEL);
	if (!buf) {
		dbg("error kmalloc -> out of mem ?");
		return -ENOMEM;
	}

	result = usb_serial_generic_open(port, filp);
	if (result)
		return result;

	/* open */
	ARK3116_RCV(serial,111,0xFE,0xC0,0x0000,0x0003, 0x02, buf);

	ARK3116_SND(serial,112,0xFE,0x40,0x0082,0x0003);
	ARK3116_SND(serial,113,0xFE,0x40,0x001A,0x0000);
	ARK3116_SND(serial,114,0xFE,0x40,0x0000,0x0001);
	ARK3116_SND(serial,115,0xFE,0x40,0x0002,0x0003);

	ARK3116_RCV(serial,116,0xFE,0xC0,0x0000,0x0004, 0x03, buf);
	ARK3116_SND(serial,117,0xFE,0x40,0x0002,0x0004);

	ARK3116_RCV(serial,118,0xFE,0xC0,0x0000,0x0004, 0x02, buf);
	ARK3116_SND(serial,119,0xFE,0x40,0x0000,0x0004);

	ARK3116_RCV(serial,120,0xFE,0xC0,0x0000,0x0004, 0x00, buf);

	ARK3116_SND(serial,121,0xFE,0x40,0x0001,0x0004);

	ARK3116_RCV(serial,122,0xFE,0xC0,0x0000,0x0004, 0x01, buf);

	ARK3116_SND(serial,123,0xFE,0x40,0x0003,0x0004);

	/* returns different values (control lines ?!) */
	ARK3116_RCV(serial,124,0xFE,0xC0,0x0000,0x0006, 0xFF, buf);

	/* initialise termios: */
	if (port->tty)
		ark3116_set_termios(port, &tmp_termios);

	kfree(buf);

	return result;

}

static int ark3116_ioctl(struct usb_serial_port *port, struct file *file,
			 unsigned int cmd, unsigned long arg)
{
385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410
	struct serial_struct serstruct;
	void __user *user_arg = (void __user *)arg;

	switch (cmd) {
	case TIOCGSERIAL:
		/* XXX: Some of these values are probably wrong. */
		memset(&serstruct, 0, sizeof (serstruct));
		serstruct.type = PORT_16654;
		serstruct.line = port->serial->minor;
		serstruct.port = port->number;
		serstruct.custom_divisor = 0;
		serstruct.baud_base = 460800;

		if (copy_to_user(user_arg, &serstruct, sizeof (serstruct)))
			return -EFAULT;

		return 0;
	case TIOCSSERIAL:
		if (copy_from_user(&serstruct, user_arg, sizeof (serstruct)))
			return -EFAULT;
		return 0;
	default:
		dbg("%s cmd 0x%04x not supported", __FUNCTION__, cmd);
		break;
	}

411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493
	return -ENOIOCTLCMD;
}

static int ark3116_tiocmget(struct usb_serial_port *port, struct file *file)
{
	struct usb_serial *serial = port->serial;
	char *buf;
	char temp;

	/* seems like serial port status info (RTS, CTS,...) is stored
	 * in reg(?) 0x0006
	 * pcb connection point 11 = GND -> sets bit4 of response
	 * pcb connection point  7 = GND -> sets bit6 of response
	 */

	buf = kmalloc(1, GFP_KERNEL);
	if (!buf) {
		dbg("error kmalloc");
		return -ENOMEM;
	}

	/* read register: */
	ARK3116_RCV_QUIET(serial,0xFE,0xC0,0x0000,0x0006,buf);
	temp = buf[0];
	kfree(buf);

	/* i do not really know if bit4=CTS and bit6=DSR... was just a
	 * quick guess !!
	 */
	return  (temp & (1<<4) ? TIOCM_CTS : 0) |
	        (temp & (1<<6) ? TIOCM_DSR : 0);
}

static struct usb_driver ark3116_driver = {
	.name =		"ark3116",
	.probe =	usb_serial_probe,
	.disconnect =	usb_serial_disconnect,
	.id_table =	id_table,
};

static struct usb_serial_driver ark3116_device = {
	.driver = {
		.owner =	THIS_MODULE,
		.name =		"ark3116",
	},
	.id_table =		id_table,
	.num_interrupt_in =	1,
	.num_bulk_in =		1,
	.num_bulk_out =		1,
	.num_ports =		1,
	.attach =		ark3116_attach,
	.set_termios =		ark3116_set_termios,
	.ioctl =		ark3116_ioctl,
	.tiocmget =		ark3116_tiocmget,
	.open =			ark3116_open,
};

static int __init ark3116_init(void)
{
	int retval;

	retval = usb_serial_register(&ark3116_device);
	if (retval)
		return retval;
	retval = usb_register(&ark3116_driver);
	if (retval)
		usb_serial_deregister(&ark3116_device);
	return retval;
}

static void __exit ark3116_exit(void)
{
	usb_deregister(&ark3116_driver);
	usb_serial_deregister(&ark3116_device);
}

module_init(ark3116_init);
module_exit(ark3116_exit);
MODULE_LICENSE("GPL");

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