[linux-block.git] / drivers / usb / serial / ark3116.c

/*
 * Copyright (C) 2006
 *   Simon Schulz (ark3116_driver <at> auctionant.de)
 *
 * 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>
#include <linux/usb/serial.h>
#include <linux/serial.h>
#include <linux/uaccess.h>


static int debug;

static struct usb_device_id id_table [] = {
	{ USB_DEVICE(0x6547, 0x0232) },
	{ USB_DEVICE(0x18ec, 0x3118) },		/* USB to IrDA adapter */
	{ },
};
MODULE_DEVICE_TABLE(usb, id_table);

static int is_irda(struct usb_serial *serial)
{
	struct usb_device *dev = serial->dev;
	if (le16_to_cpu(dev->descriptor.idVendor) == 0x18ec &&
			le16_to_cpu(dev->descriptor.idProduct) == 0x3118)
		return 1;
	return 0;
}

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,
		    ((unsigned char *)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;

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

	if (is_irda(serial))
		dbg("IrDA mode");

	/* 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, is_irda(serial) ? 0x0001 : 0x0000,
		    0x000B);

	if (is_irda(serial)) {
		ARK3116_SND(serial, 1001, 0xFE, 0x40, 0x0000, 0x000C);
		ARK3116_SND(serial, 1002, 0xFE, 0x40, 0x0041, 0x000D);
		ARK3116_SND(serial, 1003, 0xFE, 0x40, 0x0001, 0x000A);
	}

	/* <-- 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);
	if (is_irda(serial))
		ARK3116_SND(serial, 1004, 0xFE, 0x40, 0x0000, 0x0009);
	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;
}

static void ark3116_init_termios(struct tty_struct *tty)
{
	struct ktermios *termios = tty->termios;
	*termios = tty_std_termios;
	termios->c_cflag = B9600 | CS8
				      | CREAD | HUPCL | CLOCAL;
	termios->c_ispeed = 9600;
	termios->c_ospeed = 9600;
}

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

	config = 0;

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


	cflag = termios->c_cflag;
	termios->c_cflag &= ~(CMSPAR|CRTSCTS);

	buf = kmalloc(1, GFP_KERNEL);
	if (!buf) {
		dbg("error kmalloc");
		*termios = *old_termios;
		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:
			dbg("CSIZE was set but not CS5-CS8, using CS8!");
			/* fall through */
		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 stop bit (1/2) */
	if (cflag & CSTOPB) {
		config |= 0x04;
		dbg("setting 2 stop bits");
	} else {
		dbg("setting 1 stop bit");
	}

	/* set baudrate */
	baud = tty_get_baud_rate(tty);

	switch (baud) {
	case 75:
	case 150:
	case 300:
	case 600:
	case 1200:
	case 1800:
	case 2400:
	case 4800:
	case 9600:
	case 19200:
	case 38400:
	case 57600:
	case 115200:
	case 230400:
	case 460800:
		/* Report the resulting rate back to the caller */
		tty_encode_baud_rate(tty, baud, baud);
		break;
	/* set 9600 as default (if given baudrate is invalid for example) */
	default:
		tty_encode_baud_rate(tty, 9600, 9600);
	case 0:
		baud = 9600;
	}

	/*
	 * found by try'n'error, be careful, maybe there are other options
	 * for multiplicator etc! (3.5 for example)
	 */
	if (baud == 460800)
		/* strange, for 460800 the formula is wrong
		 * if using 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 tty_struct *tty, struct usb_serial_port *port)
{
	struct ktermios tmp_termios;
	struct usb_serial *serial = port->serial;
	char *buf;
	int result = 0;

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

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

	result = usb_serial_generic_open(tty, port);
	if (result)
		goto err_out;

	/* 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 (tty)
		ark3116_set_termios(tty, port, &tmp_termios);

err_out:
	kfree(buf);

	return result;
}

static int ark3116_ioctl(struct tty_struct *tty, struct file *file,
			 unsigned int cmd, unsigned long arg)
{
	struct usb_serial_port *port = tty->driver_data;
	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", __func__, cmd);
		break;
	}

	return -ENOIOCTLCMD;
}

static int ark3116_tiocmget(struct tty_struct *tty, struct file *file)
{
	struct usb_serial_port *port = tty->driver_data;
	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... 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,
	.no_dynamic_id =	1,
};

static struct usb_serial_driver ark3116_device = {
	.driver = {
		.owner =	THIS_MODULE,
		.name =		"ark3116",
	},
	.id_table =		id_table,
	.usb_driver =		&ark3116_driver,
	.num_ports =		1,
	.attach =		ark3116_attach,
	.set_termios =		ark3116_set_termios,
	.init_termios =		ark3116_init_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");
Commit	Line	Data
815ddc99	1	/*
2f430b4b WL	2	* Copyright (C) 2006
	3	* Simon Schulz (ark3116_driver <at> auctionant.de)
	4	*
815ddc99 GKH	5	* ark3116
	6	* - implements a driver for the arkmicro ark3116 chipset (vendor=0x6547,
	7	* productid=0x0232) (used in a datacable called KQ-U8A)
	8	*
	9	* - based on code by krisfx -> thanks !!
	10	* (see http://www.linuxquestions.org/questions/showthread.php?p=2184457#post2184457)
	11	*
	12	* - based on logs created by usbsnoopy
	13	*
815ddc99 GKH	14	* This program is free software; you can redistribute it and/or modify it
	15	* under the terms of the GNU General Public License as published by the
	16	* Free Software Foundation; either version 2 of the License, or (at your
	17	* option) any later version.
	18	*/
	19
	20	#include <linux/kernel.h>
	21	#include <linux/init.h>
	22	#include <linux/tty.h>
	23	#include <linux/module.h>
	24	#include <linux/usb.h>
a969888c	25	#include <linux/usb/serial.h>
2f430b4b	26	#include <linux/serial.h>
c4d0f8cb	27	#include <linux/uaccess.h>
815ddc99 GKH	28
	29
	30	static int debug;
	31
	32	static struct usb_device_id id_table [] = {
	33	{ USB_DEVICE(0x6547, 0x0232) },
5128a66c	34	{ USB_DEVICE(0x18ec, 0x3118) }, /* USB to IrDA adapter */
815ddc99 GKH	35	{ },
	36	};
	37	MODULE_DEVICE_TABLE(usb, id_table);
	38
5128a66c OZ	39	static int is_irda(struct usb_serial *serial)
	40	{
	41	struct usb_device *dev = serial->dev;
	42	if (le16_to_cpu(dev->descriptor.idVendor) == 0x18ec &&
	43	le16_to_cpu(dev->descriptor.idProduct) == 0x3118)
	44	return 1;
	45	return 0;
	46	}
	47
815ddc99 GKH	48	static inline void ARK3116_SND(struct usb_serial *serial, int seq,
	49	__u8 request, __u8 requesttype,
	50	__u16 value, __u16 index)
	51	{
	52	int result;
	53	result = usb_control_msg(serial->dev,
988440e7	54	usb_sndctrlpipe(serial->dev, 0),
815ddc99	55	request, requesttype, value, index,
988440e7 WL	56	NULL, 0x00, 1000);
988440e7 WL	57	dbg("%03d > ok", seq);
815ddc99 GKH	58	}
	59
	60	static inline void ARK3116_RCV(struct usb_serial *serial, int seq,
	61	__u8 request, __u8 requesttype,
	62	__u16 value, __u16 index, __u8 expected,
	63	char *buf)
	64	{
	65	int result;
	66	result = usb_control_msg(serial->dev,
988440e7 WL	67	usb_rcvctrlpipe(serial->dev, 0),
	68	request, requesttype, value, index,
	69	buf, 0x0000001, 1000);
815ddc99	70	if (result)
b268f484 JE	71	dbg("%03d < %d bytes [0x%02X]", seq, result,
b268f484 JE	72	((unsigned char *)buf)[0]);
815ddc99 GKH	73	else
	74	dbg("%03d < 0 bytes", seq);
	75	}
	76
815ddc99 GKH	77	static inline void ARK3116_RCV_QUIET(struct usb_serial *serial,
	78	__u8 request, __u8 requesttype,
	79	__u16 value, __u16 index, char *buf)
	80	{
	81	usb_control_msg(serial->dev,
988440e7	82	usb_rcvctrlpipe(serial->dev, 0),
815ddc99 GKH	83	request, requesttype, value, index,
	84	buf, 0x0000001, 1000);
	85	}
	86
815ddc99 GKH	87	static int ark3116_attach(struct usb_serial *serial)
	88	{
	89	char *buf;
815ddc99 GKH	90
	91	buf = kmalloc(1, GFP_KERNEL);
	92	if (!buf) {
988440e7	93	dbg("error kmalloc -> out of mem?");
fe1ae7fd	94	return -ENOMEM;
815ddc99 GKH	95	}
815ddc99 GKH	96
5128a66c OZ	97	if (is_irda(serial))
	98	dbg("IrDA mode");
	99
815ddc99	100	/* 3 */
988440e7 WL	101	ARK3116_SND(serial, 3, 0xFE, 0x40, 0x0008, 0x0002);
	102	ARK3116_SND(serial, 4, 0xFE, 0x40, 0x0008, 0x0001);
	103	ARK3116_SND(serial, 5, 0xFE, 0x40, 0x0000, 0x0008);
5128a66c OZ	104	ARK3116_SND(serial, 6, 0xFE, 0x40, is_irda(serial) ? 0x0001 : 0x0000,
	105	0x000B);
	106
	107	if (is_irda(serial)) {
	108	ARK3116_SND(serial, 1001, 0xFE, 0x40, 0x0000, 0x000C);
	109	ARK3116_SND(serial, 1002, 0xFE, 0x40, 0x0041, 0x000D);
	110	ARK3116_SND(serial, 1003, 0xFE, 0x40, 0x0001, 0x000A);
	111	}
815ddc99 GKH	112
815ddc99 GKH	113	/* <-- seq7 */
988440e7 WL	114	ARK3116_RCV(serial, 7, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
	115	ARK3116_SND(serial, 8, 0xFE, 0x40, 0x0080, 0x0003);
	116	ARK3116_SND(serial, 9, 0xFE, 0x40, 0x001A, 0x0000);
	117	ARK3116_SND(serial, 10, 0xFE, 0x40, 0x0000, 0x0001);
	118	ARK3116_SND(serial, 11, 0xFE, 0x40, 0x0000, 0x0003);
815ddc99 GKH	119
815ddc99 GKH	120	/* <-- seq12 */
988440e7 WL	121	ARK3116_RCV(serial, 12, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
988440e7 WL	122	ARK3116_SND(serial, 13, 0xFE, 0x40, 0x0000, 0x0004);
815ddc99 GKH	123
815ddc99 GKH	124	/* 14 */
988440e7 WL	125	ARK3116_RCV(serial, 14, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
988440e7 WL	126	ARK3116_SND(serial, 15, 0xFE, 0x40, 0x0000, 0x0004);
815ddc99 GKH	127
815ddc99 GKH	128	/* 16 */
988440e7	129	ARK3116_RCV(serial, 16, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
815ddc99	130	/* --> seq17 */
988440e7	131	ARK3116_SND(serial, 17, 0xFE, 0x40, 0x0001, 0x0004);
815ddc99 GKH	132
815ddc99 GKH	133	/* <-- seq18 */
988440e7	134	ARK3116_RCV(serial, 18, 0xFE, 0xC0, 0x0000, 0x0004, 0x01, buf);
815ddc99 GKH	135
815ddc99 GKH	136	/* --> seq19 */
988440e7	137	ARK3116_SND(serial, 19, 0xFE, 0x40, 0x0003, 0x0004);
815ddc99 GKH	138
815ddc99 GKH	139	/* <-- seq20 */
988440e7 WL	140	/* seems like serial port status info (RTS, CTS, ...) */
	141	/* returns modem control line status?! */
	142	ARK3116_RCV(serial, 20, 0xFE, 0xC0, 0x0000, 0x0006, 0xFF, buf);
	143
	144	/* set 9600 baud & do some init?! */
	145	ARK3116_SND(serial, 147, 0xFE, 0x40, 0x0083, 0x0003);
	146	ARK3116_SND(serial, 148, 0xFE, 0x40, 0x0038, 0x0000);
	147	ARK3116_SND(serial, 149, 0xFE, 0x40, 0x0001, 0x0001);
5128a66c OZ	148	if (is_irda(serial))
5128a66c OZ	149	ARK3116_SND(serial, 1004, 0xFE, 0x40, 0x0000, 0x0009);
988440e7 WL	150	ARK3116_SND(serial, 150, 0xFE, 0x40, 0x0003, 0x0003);
	151	ARK3116_RCV(serial, 151, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
	152	ARK3116_SND(serial, 152, 0xFE, 0x40, 0x0000, 0x0003);
	153	ARK3116_RCV(serial, 153, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
	154	ARK3116_SND(serial, 154, 0xFE, 0x40, 0x0003, 0x0003);
815ddc99 GKH	155
815ddc99 GKH	156	kfree(buf);
988440e7	157	return 0;
fe1ae7fd	158	}
815ddc99	159
fe1ae7fd AC	160	static void ark3116_init_termios(struct tty_struct *tty)
	161	{
	162	struct ktermios *termios = tty->termios;
	163	*termios = tty_std_termios;
	164	termios->c_cflag = B9600 \| CS8
	165	\| CREAD \| HUPCL \| CLOCAL;
	166	termios->c_ispeed = 9600;
	167	termios->c_ospeed = 9600;
815ddc99 GKH	168	}
815ddc99 GKH	169
95da310e AC	170	static void ark3116_set_termios(struct tty_struct *tty,
95da310e AC	171	struct usb_serial_port *port,
606d099c	172	struct ktermios *old_termios)
815ddc99 GKH	173	{
815ddc99 GKH	174	struct usb_serial *serial = port->serial;
95da310e	175	struct ktermios *termios = tty->termios;
adb5dca1	176	unsigned int cflag = termios->c_cflag;
815ddc99 GKH	177	int baud;
	178	int ark3116_baud;
	179	char *buf;
	180	char config;
	181
	182	config = 0;
	183
441b62c1	184	dbg("%s - port %d", __func__, port->number);
815ddc99	185
815ddc99	186
adb5dca1 AC	187	cflag = termios->c_cflag;
adb5dca1 AC	188	termios->c_cflag &= ~(CMSPAR\|CRTSCTS);
815ddc99	189
815ddc99 GKH	190	buf = kmalloc(1, GFP_KERNEL);
	191	if (!buf) {
	192	dbg("error kmalloc");
95da310e	193	termios = old_termios;
815ddc99 GKH	194	return;
	195	}
	196
	197	/* set data bit count (8/7/6/5) */
988440e7 WL	198	if (cflag & CSIZE) {
988440e7 WL	199	switch (cflag & CSIZE) {
815ddc99 GKH	200	case CS5:
	201	config \|= 0x00;
	202	dbg("setting CS5");
	203	break;
	204	case CS6:
	205	config \|= 0x01;
	206	dbg("setting CS6");
	207	break;
	208	case CS7:
	209	config \|= 0x02;
	210	dbg("setting CS7");
	211	break;
	212	default:
568c24ad	213	dbg("CSIZE was set but not CS5-CS8, using CS8!");
988440e7	214	/* fall through */
815ddc99 GKH	215	case CS8:
	216	config \|= 0x03;
	217	dbg("setting CS8");
	218	break;
	219	}
	220	}
	221
988440e7 WL	222	/* set parity (NONE/EVEN/ODD) */
988440e7 WL	223	if (cflag & PARENB) {
815ddc99 GKH	224	if (cflag & PARODD) {
	225	config \|= 0x08;
	226	dbg("setting parity to ODD");
	227	} else {
	228	config \|= 0x18;
	229	dbg("setting parity to EVEN");
	230	}
	231	} else {
	232	dbg("setting parity to NONE");
	233	}
	234
988440e7	235	/* set stop bit (1/2) */
815ddc99 GKH	236	if (cflag & CSTOPB) {
815ddc99 GKH	237	config \|= 0x04;
988440e7	238	dbg("setting 2 stop bits");
815ddc99	239	} else {
988440e7	240	dbg("setting 1 stop bit");
815ddc99 GKH	241	}
815ddc99 GKH	242
988440e7	243	/* set baudrate */
95da310e	244	baud = tty_get_baud_rate(tty);
568c24ad AC	245
568c24ad AC	246	switch (baud) {
c4d0f8cb AC	247	case 75:
	248	case 150:
	249	case 300:
	250	case 600:
	251	case 1200:
	252	case 1800:
	253	case 2400:
	254	case 4800:
	255	case 9600:
	256	case 19200:
	257	case 38400:
	258	case 57600:
	259	case 115200:
	260	case 230400:
	261	case 460800:
	262	/* Report the resulting rate back to the caller */
95da310e	263	tty_encode_baud_rate(tty, baud, baud);
c4d0f8cb AC	264	break;
	265	/* set 9600 as default (if given baudrate is invalid for example) */
	266	default:
95da310e	267	tty_encode_baud_rate(tty, 9600, 9600);
c4d0f8cb AC	268	case 0:
c4d0f8cb AC	269	baud = 9600;
815ddc99 GKH	270	}
815ddc99 GKH	271
815ddc99 GKH	272	/*
815ddc99 GKH	273	* found by try'n'error, be careful, maybe there are other options
568c24ad	274	* for multiplicator etc! (3.5 for example)
815ddc99 GKH	275	*/
	276	if (baud == 460800)
	277	/* strange, for 460800 the formula is wrong
988440e7	278	* if using round() then 9600baud is wrong) */
815ddc99 GKH	279	ark3116_baud = 7;
	280	else
	281	ark3116_baud = 3000000 / baud;
	282
	283	/* ? */
988440e7 WL	284	ARK3116_RCV(serial, 0, 0xFE, 0xC0, 0x0000, 0x0003, 0x03, buf);
988440e7 WL	285
815ddc99 GKH	286	/* offset = buf[0]; */
815ddc99 GKH	287	/* offset = 0x03; */
988440e7	288	/* dbg("using 0x%04X as target for 0x0003:", 0x0080 + offset); */
815ddc99 GKH	289
815ddc99 GKH	290	/* set baudrate */
988440e7 WL	291	dbg("setting baudrate to %d (->reg=%d)", baud, ark3116_baud);
	292	ARK3116_SND(serial, 147, 0xFE, 0x40, 0x0083, 0x0003);
	293	ARK3116_SND(serial, 148, 0xFE, 0x40,
	294	(ark3116_baud & 0x00FF), 0x0000);
	295	ARK3116_SND(serial, 149, 0xFE, 0x40,
	296	(ark3116_baud & 0xFF00) >> 8, 0x0001);
	297	ARK3116_SND(serial, 150, 0xFE, 0x40, 0x0003, 0x0003);
815ddc99 GKH	298
815ddc99 GKH	299	/* ? */
988440e7 WL	300	ARK3116_RCV(serial, 151, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
988440e7 WL	301	ARK3116_SND(serial, 152, 0xFE, 0x40, 0x0000, 0x0003);
815ddc99 GKH	302
	303	/* set data bit count, stop bit count & parity: */
	304	dbg("updating bit count, stop bit or parity (cfg=0x%02X)", config);
988440e7 WL	305	ARK3116_RCV(serial, 153, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
988440e7 WL	306	ARK3116_SND(serial, 154, 0xFE, 0x40, config, 0x0003);
815ddc99 GKH	307
815ddc99 GKH	308	if (cflag & CRTSCTS)
988440e7	309	dbg("CRTSCTS not supported by chipset?!");
815ddc99	310
988440e7	311	/* TEST ARK3116_SND(154, 0xFE, 0x40, 0xFFFF, 0x0006); */
815ddc99 GKH	312
815ddc99 GKH	313	kfree(buf);
adb5dca1	314
815ddc99 GKH	315	return;
	316	}
	317
a509a7e4	318	static int ark3116_open(struct tty_struct tty, struct usb_serial_port port)
815ddc99	319	{
606d099c	320	struct ktermios tmp_termios;
815ddc99 GKH	321	struct usb_serial *serial = port->serial;
	322	char *buf;
	323	int result = 0;
	324
441b62c1	325	dbg("%s - port %d", __func__, port->number);
815ddc99 GKH	326
	327	buf = kmalloc(1, GFP_KERNEL);
	328	if (!buf) {
988440e7	329	dbg("error kmalloc -> out of mem?");
815ddc99 GKH	330	return -ENOMEM;
	331	}
	332
a509a7e4	333	result = usb_serial_generic_open(tty, port);
815ddc99	334	if (result)
4edf2c83	335	goto err_out;
815ddc99 GKH	336
815ddc99 GKH	337	/* open */
988440e7	338	ARK3116_RCV(serial, 111, 0xFE, 0xC0, 0x0000, 0x0003, 0x02, buf);
815ddc99	339
988440e7 WL	340	ARK3116_SND(serial, 112, 0xFE, 0x40, 0x0082, 0x0003);
	341	ARK3116_SND(serial, 113, 0xFE, 0x40, 0x001A, 0x0000);
	342	ARK3116_SND(serial, 114, 0xFE, 0x40, 0x0000, 0x0001);
	343	ARK3116_SND(serial, 115, 0xFE, 0x40, 0x0002, 0x0003);
815ddc99	344
988440e7 WL	345	ARK3116_RCV(serial, 116, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
988440e7 WL	346	ARK3116_SND(serial, 117, 0xFE, 0x40, 0x0002, 0x0004);
815ddc99	347
988440e7 WL	348	ARK3116_RCV(serial, 118, 0xFE, 0xC0, 0x0000, 0x0004, 0x02, buf);
988440e7 WL	349	ARK3116_SND(serial, 119, 0xFE, 0x40, 0x0000, 0x0004);
815ddc99	350
988440e7	351	ARK3116_RCV(serial, 120, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
815ddc99	352
988440e7	353	ARK3116_SND(serial, 121, 0xFE, 0x40, 0x0001, 0x0004);
815ddc99	354
988440e7	355	ARK3116_RCV(serial, 122, 0xFE, 0xC0, 0x0000, 0x0004, 0x01, buf);
815ddc99	356
988440e7	357	ARK3116_SND(serial, 123, 0xFE, 0x40, 0x0003, 0x0004);
815ddc99	358
988440e7 WL	359	/* returns different values (control lines?!) */
988440e7 WL	360	ARK3116_RCV(serial, 124, 0xFE, 0xC0, 0x0000, 0x0006, 0xFF, buf);
815ddc99	361
988440e7	362	/* initialise termios */
95da310e AC	363	if (tty)
95da310e AC	364	ark3116_set_termios(tty, port, &tmp_termios);
815ddc99	365
4edf2c83	366	err_out:
815ddc99 GKH	367	kfree(buf);
	368
	369	return result;
815ddc99 GKH	370	}
815ddc99 GKH	371
95da310e	372	static int ark3116_ioctl(struct tty_struct tty, struct file file,
815ddc99 GKH	373	unsigned int cmd, unsigned long arg)
815ddc99 GKH	374	{
95da310e	375	struct usb_serial_port *port = tty->driver_data;
2f430b4b WL	376	struct serial_struct serstruct;
	377	void __user user_arg = (void __user )arg;
	378
	379	switch (cmd) {
	380	case TIOCGSERIAL:
	381	/* XXX: Some of these values are probably wrong. */
c4d0f8cb	382	memset(&serstruct, 0, sizeof(serstruct));
2f430b4b WL	383	serstruct.type = PORT_16654;
	384	serstruct.line = port->serial->minor;
	385	serstruct.port = port->number;
	386	serstruct.custom_divisor = 0;
	387	serstruct.baud_base = 460800;
	388
c4d0f8cb	389	if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
2f430b4b WL	390	return -EFAULT;
	391
	392	return 0;
	393	case TIOCSSERIAL:
c4d0f8cb	394	if (copy_from_user(&serstruct, user_arg, sizeof(serstruct)))
2f430b4b WL	395	return -EFAULT;
	396	return 0;
	397	default:
441b62c1	398	dbg("%s cmd 0x%04x not supported", __func__, cmd);
2f430b4b WL	399	break;
	400	}
	401
815ddc99 GKH	402	return -ENOIOCTLCMD;
	403	}
	404
95da310e	405	static int ark3116_tiocmget(struct tty_struct tty, struct file file)
815ddc99	406	{
95da310e	407	struct usb_serial_port *port = tty->driver_data;
815ddc99 GKH	408	struct usb_serial *serial = port->serial;
	409	char *buf;
	410	char temp;
	411
988440e7	412	/* seems like serial port status info (RTS, CTS, ...) is stored
815ddc99 GKH	413	* in reg(?) 0x0006
	414	* pcb connection point 11 = GND -> sets bit4 of response
	415	* pcb connection point 7 = GND -> sets bit6 of response
	416	*/
	417
	418	buf = kmalloc(1, GFP_KERNEL);
	419	if (!buf) {
	420	dbg("error kmalloc");
	421	return -ENOMEM;
	422	}
	423
988440e7 WL	424	/* read register */
988440e7 WL	425	ARK3116_RCV_QUIET(serial, 0xFE, 0xC0, 0x0000, 0x0006, buf);
815ddc99 GKH	426	temp = buf[0];
	427	kfree(buf);
	428
988440e7 WL	429	/* i do not really know if bit4=CTS and bit6=DSR... just a
988440e7 WL	430	* quick guess!
815ddc99	431	*/
988440e7 WL	432	return (temp & (1<<4) ? TIOCM_CTS : 0)
988440e7 WL	433	\| (temp & (1<<6) ? TIOCM_DSR : 0);
815ddc99 GKH	434	}
	435
	436	static struct usb_driver ark3116_driver = {
	437	.name = "ark3116",
	438	.probe = usb_serial_probe,
	439	.disconnect = usb_serial_disconnect,
	440	.id_table = id_table,
d9b1b787	441	.no_dynamic_id = 1,
815ddc99 GKH	442	};
	443
	444	static struct usb_serial_driver ark3116_device = {
	445	.driver = {
	446	.owner = THIS_MODULE,
	447	.name = "ark3116",
	448	},
	449	.id_table = id_table,
d9b1b787	450	.usb_driver = &ark3116_driver,
815ddc99 GKH	451	.num_ports = 1,
	452	.attach = ark3116_attach,
	453	.set_termios = ark3116_set_termios,
fe1ae7fd	454	.init_termios = ark3116_init_termios,
815ddc99 GKH	455	.ioctl = ark3116_ioctl,
	456	.tiocmget = ark3116_tiocmget,
	457	.open = ark3116_open,
	458	};
	459
	460	static int __init ark3116_init(void)
	461	{
	462	int retval;
	463
	464	retval = usb_serial_register(&ark3116_device);
	465	if (retval)
	466	return retval;
	467	retval = usb_register(&ark3116_driver);
	468	if (retval)
	469	usb_serial_deregister(&ark3116_device);
	470	return retval;
	471	}
	472
	473	static void __exit ark3116_exit(void)
	474	{
	475	usb_deregister(&ark3116_driver);
	476	usb_serial_deregister(&ark3116_device);
	477	}
	478
	479	module_init(ark3116_init);
	480	module_exit(ark3116_exit);
	481	MODULE_LICENSE("GPL");
	482
	483	module_param(debug, bool, S_IRUGO \| S_IWUSR);
	484	MODULE_PARM_DESC(debug, "Debug enabled or not");
	485