[deliverable/linux.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) },
	{ },
};
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,
		    ((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;
	struct ark3116_private *priv;
	int i;

	for (i = 0; i < serial->num_ports; ++i) {
		priv = kzalloc(sizeof(struct ark3116_private), GFP_KERNEL);
		if (!priv)
			goto cleanup;
		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) {
		kfree(usb_get_serial_port_data(serial->port[i]));
		usb_set_serial_port_data(serial->port[i], NULL);
	}
	return -ENOMEM;
}

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 ark3116_private *priv = usb_get_serial_port_data(port);
	struct ktermios *termios = tty->termios;
	unsigned int cflag = termios->c_cflag;
	unsigned long flags;
	int baud;
	int ark3116_baud;
	char *buf;
	char config;

	config = 0;

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

	spin_lock_irqsave(&priv->lock, flags);
	if (!priv->termios_initialized) {
		*termios = tty_std_termios;
		termios->c_cflag = B9600 | CS8
					      | CREAD | HUPCL | CLOCAL;
		termios->c_ispeed = 9600;
		termios->c_ospeed = 9600;
		priv->termios_initialized = 1;
	}
	spin_unlock_irqrestore(&priv->lock, flags);

	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,
	.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) },
	34	{ },
	35	};
	36	MODULE_DEVICE_TABLE(usb, id_table);
	37
	38	struct ark3116_private {
	39	spinlock_t lock;
	40	u8 termios_initialized;
	41	};
	42
	43	static inline void ARK3116_SND(struct usb_serial *serial, int seq,
	44	__u8 request, __u8 requesttype,
	45	__u16 value, __u16 index)
	46	{
	47	int result;
	48	result = usb_control_msg(serial->dev,
988440e7	49	usb_sndctrlpipe(serial->dev, 0),
815ddc99	50	request, requesttype, value, index,
988440e7 WL	51	NULL, 0x00, 1000);
988440e7 WL	52	dbg("%03d > ok", seq);
815ddc99 GKH	53	}
	54
	55	static inline void ARK3116_RCV(struct usb_serial *serial, int seq,
	56	__u8 request, __u8 requesttype,
	57	__u16 value, __u16 index, __u8 expected,
	58	char *buf)
	59	{
	60	int result;
	61	result = usb_control_msg(serial->dev,
988440e7 WL	62	usb_rcvctrlpipe(serial->dev, 0),
	63	request, requesttype, value, index,
	64	buf, 0x0000001, 1000);
815ddc99	65	if (result)
b268f484 JE	66	dbg("%03d < %d bytes [0x%02X]", seq, result,
b268f484 JE	67	((unsigned char *)buf)[0]);
815ddc99 GKH	68	else
	69	dbg("%03d < 0 bytes", seq);
	70	}
	71
815ddc99 GKH	72	static inline void ARK3116_RCV_QUIET(struct usb_serial *serial,
	73	__u8 request, __u8 requesttype,
	74	__u16 value, __u16 index, char *buf)
	75	{
	76	usb_control_msg(serial->dev,
988440e7	77	usb_rcvctrlpipe(serial->dev, 0),
815ddc99 GKH	78	request, requesttype, value, index,
	79	buf, 0x0000001, 1000);
	80	}
	81
815ddc99 GKH	82	static int ark3116_attach(struct usb_serial *serial)
	83	{
	84	char *buf;
	85	struct ark3116_private *priv;
	86	int i;
	87
	88	for (i = 0; i < serial->num_ports; ++i) {
7ac9da10	89	priv = kzalloc(sizeof(struct ark3116_private), GFP_KERNEL);
815ddc99 GKH	90	if (!priv)
815ddc99 GKH	91	goto cleanup;
815ddc99 GKH	92	spin_lock_init(&priv->lock);
	93
	94	usb_set_serial_port_data(serial->port[i], priv);
	95	}
	96
	97	buf = kmalloc(1, GFP_KERNEL);
	98	if (!buf) {
988440e7	99	dbg("error kmalloc -> out of mem?");
815ddc99 GKH	100	goto cleanup;
	101	}
	102
	103	/* 3 */
988440e7 WL	104	ARK3116_SND(serial, 3, 0xFE, 0x40, 0x0008, 0x0002);
	105	ARK3116_SND(serial, 4, 0xFE, 0x40, 0x0008, 0x0001);
	106	ARK3116_SND(serial, 5, 0xFE, 0x40, 0x0000, 0x0008);
	107	ARK3116_SND(serial, 6, 0xFE, 0x40, 0x0000, 0x000B);
815ddc99 GKH	108
815ddc99 GKH	109	/* <-- seq7 */
988440e7 WL	110	ARK3116_RCV(serial, 7, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
	111	ARK3116_SND(serial, 8, 0xFE, 0x40, 0x0080, 0x0003);
	112	ARK3116_SND(serial, 9, 0xFE, 0x40, 0x001A, 0x0000);
	113	ARK3116_SND(serial, 10, 0xFE, 0x40, 0x0000, 0x0001);
	114	ARK3116_SND(serial, 11, 0xFE, 0x40, 0x0000, 0x0003);
815ddc99 GKH	115
815ddc99 GKH	116	/* <-- seq12 */
988440e7 WL	117	ARK3116_RCV(serial, 12, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
988440e7 WL	118	ARK3116_SND(serial, 13, 0xFE, 0x40, 0x0000, 0x0004);
815ddc99 GKH	119
815ddc99 GKH	120	/* 14 */
988440e7 WL	121	ARK3116_RCV(serial, 14, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
988440e7 WL	122	ARK3116_SND(serial, 15, 0xFE, 0x40, 0x0000, 0x0004);
815ddc99 GKH	123
815ddc99 GKH	124	/* 16 */
988440e7	125	ARK3116_RCV(serial, 16, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
815ddc99	126	/* --> seq17 */
988440e7	127	ARK3116_SND(serial, 17, 0xFE, 0x40, 0x0001, 0x0004);
815ddc99 GKH	128
815ddc99 GKH	129	/* <-- seq18 */
988440e7	130	ARK3116_RCV(serial, 18, 0xFE, 0xC0, 0x0000, 0x0004, 0x01, buf);
815ddc99 GKH	131
815ddc99 GKH	132	/* --> seq19 */
988440e7	133	ARK3116_SND(serial, 19, 0xFE, 0x40, 0x0003, 0x0004);
815ddc99 GKH	134
815ddc99 GKH	135	/* <-- seq20 */
988440e7 WL	136	/* seems like serial port status info (RTS, CTS, ...) */
	137	/* returns modem control line status?! */
	138	ARK3116_RCV(serial, 20, 0xFE, 0xC0, 0x0000, 0x0006, 0xFF, buf);
	139
	140	/* set 9600 baud & do some init?! */
	141	ARK3116_SND(serial, 147, 0xFE, 0x40, 0x0083, 0x0003);
	142	ARK3116_SND(serial, 148, 0xFE, 0x40, 0x0038, 0x0000);
	143	ARK3116_SND(serial, 149, 0xFE, 0x40, 0x0001, 0x0001);
	144	ARK3116_SND(serial, 150, 0xFE, 0x40, 0x0003, 0x0003);
	145	ARK3116_RCV(serial, 151, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
	146	ARK3116_SND(serial, 152, 0xFE, 0x40, 0x0000, 0x0003);
	147	ARK3116_RCV(serial, 153, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
	148	ARK3116_SND(serial, 154, 0xFE, 0x40, 0x0003, 0x0003);
815ddc99 GKH	149
815ddc99 GKH	150	kfree(buf);
988440e7	151	return 0;
815ddc99 GKH	152
815ddc99 GKH	153	cleanup:
004b4f2d ON	154	for (--i; i >= 0; --i) {
004b4f2d ON	155	kfree(usb_get_serial_port_data(serial->port[i]));
815ddc99	156	usb_set_serial_port_data(serial->port[i], NULL);
004b4f2d	157	}
815ddc99 GKH	158	return -ENOMEM;
	159	}
	160
95da310e AC	161	static void ark3116_set_termios(struct tty_struct *tty,
95da310e AC	162	struct usb_serial_port *port,
606d099c	163	struct ktermios *old_termios)
815ddc99 GKH	164	{
	165	struct usb_serial *serial = port->serial;
	166	struct ark3116_private *priv = usb_get_serial_port_data(port);
95da310e	167	struct ktermios *termios = tty->termios;
adb5dca1	168	unsigned int cflag = termios->c_cflag;
815ddc99 GKH	169	unsigned long flags;
	170	int baud;
	171	int ark3116_baud;
	172	char *buf;
	173	char config;
	174
	175	config = 0;
	176
441b62c1	177	dbg("%s - port %d", __func__, port->number);
815ddc99	178
815ddc99 GKH	179	spin_lock_irqsave(&priv->lock, flags);
815ddc99 GKH	180	if (!priv->termios_initialized) {
95da310e AC	181	*termios = tty_std_termios;
95da310e AC	182	termios->c_cflag = B9600 \| CS8
988440e7	183	\| CREAD \| HUPCL \| CLOCAL;
adb5dca1 AC	184	termios->c_ispeed = 9600;
adb5dca1 AC	185	termios->c_ospeed = 9600;
815ddc99 GKH	186	priv->termios_initialized = 1;
	187	}
	188	spin_unlock_irqrestore(&priv->lock, flags);
	189
adb5dca1 AC	190	cflag = termios->c_cflag;
adb5dca1 AC	191	termios->c_cflag &= ~(CMSPAR\|CRTSCTS);
815ddc99	192
815ddc99 GKH	193	buf = kmalloc(1, GFP_KERNEL);
	194	if (!buf) {
	195	dbg("error kmalloc");
95da310e	196	termios = old_termios;
815ddc99 GKH	197	return;
	198	}
	199
	200	/* set data bit count (8/7/6/5) */
988440e7 WL	201	if (cflag & CSIZE) {
988440e7 WL	202	switch (cflag & CSIZE) {
815ddc99 GKH	203	case CS5:
	204	config \|= 0x00;
	205	dbg("setting CS5");
	206	break;
	207	case CS6:
	208	config \|= 0x01;
	209	dbg("setting CS6");
	210	break;
	211	case CS7:
	212	config \|= 0x02;
	213	dbg("setting CS7");
	214	break;
	215	default:
568c24ad	216	dbg("CSIZE was set but not CS5-CS8, using CS8!");
988440e7	217	/* fall through */
815ddc99 GKH	218	case CS8:
	219	config \|= 0x03;
	220	dbg("setting CS8");
	221	break;
	222	}
	223	}
	224
988440e7 WL	225	/* set parity (NONE/EVEN/ODD) */
988440e7 WL	226	if (cflag & PARENB) {
815ddc99 GKH	227	if (cflag & PARODD) {
	228	config \|= 0x08;
	229	dbg("setting parity to ODD");
	230	} else {
	231	config \|= 0x18;
	232	dbg("setting parity to EVEN");
	233	}
	234	} else {
	235	dbg("setting parity to NONE");
	236	}
	237
988440e7	238	/* set stop bit (1/2) */
815ddc99 GKH	239	if (cflag & CSTOPB) {
815ddc99 GKH	240	config \|= 0x04;
988440e7	241	dbg("setting 2 stop bits");
815ddc99	242	} else {
988440e7	243	dbg("setting 1 stop bit");
815ddc99 GKH	244	}
815ddc99 GKH	245
988440e7	246	/* set baudrate */
95da310e	247	baud = tty_get_baud_rate(tty);
568c24ad AC	248
568c24ad AC	249	switch (baud) {
c4d0f8cb AC	250	case 75:
	251	case 150:
	252	case 300:
	253	case 600:
	254	case 1200:
	255	case 1800:
	256	case 2400:
	257	case 4800:
	258	case 9600:
	259	case 19200:
	260	case 38400:
	261	case 57600:
	262	case 115200:
	263	case 230400:
	264	case 460800:
	265	/* Report the resulting rate back to the caller */
95da310e	266	tty_encode_baud_rate(tty, baud, baud);
c4d0f8cb AC	267	break;
	268	/* set 9600 as default (if given baudrate is invalid for example) */
	269	default:
95da310e	270	tty_encode_baud_rate(tty, 9600, 9600);
c4d0f8cb AC	271	case 0:
c4d0f8cb AC	272	baud = 9600;
815ddc99 GKH	273	}
815ddc99 GKH	274
815ddc99 GKH	275	/*
815ddc99 GKH	276	* found by try'n'error, be careful, maybe there are other options
568c24ad	277	* for multiplicator etc! (3.5 for example)
815ddc99 GKH	278	*/
	279	if (baud == 460800)
	280	/* strange, for 460800 the formula is wrong
988440e7	281	* if using round() then 9600baud is wrong) */
815ddc99 GKH	282	ark3116_baud = 7;
	283	else
	284	ark3116_baud = 3000000 / baud;
	285
	286	/* ? */
988440e7 WL	287	ARK3116_RCV(serial, 0, 0xFE, 0xC0, 0x0000, 0x0003, 0x03, buf);
988440e7 WL	288
815ddc99 GKH	289	/* offset = buf[0]; */
815ddc99 GKH	290	/* offset = 0x03; */
988440e7	291	/* dbg("using 0x%04X as target for 0x0003:", 0x0080 + offset); */
815ddc99 GKH	292
815ddc99 GKH	293	/* set baudrate */
988440e7 WL	294	dbg("setting baudrate to %d (->reg=%d)", baud, ark3116_baud);
	295	ARK3116_SND(serial, 147, 0xFE, 0x40, 0x0083, 0x0003);
	296	ARK3116_SND(serial, 148, 0xFE, 0x40,
	297	(ark3116_baud & 0x00FF), 0x0000);
	298	ARK3116_SND(serial, 149, 0xFE, 0x40,
	299	(ark3116_baud & 0xFF00) >> 8, 0x0001);
	300	ARK3116_SND(serial, 150, 0xFE, 0x40, 0x0003, 0x0003);
815ddc99 GKH	301
815ddc99 GKH	302	/* ? */
988440e7 WL	303	ARK3116_RCV(serial, 151, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
988440e7 WL	304	ARK3116_SND(serial, 152, 0xFE, 0x40, 0x0000, 0x0003);
815ddc99 GKH	305
	306	/* set data bit count, stop bit count & parity: */
	307	dbg("updating bit count, stop bit or parity (cfg=0x%02X)", config);
988440e7 WL	308	ARK3116_RCV(serial, 153, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
988440e7 WL	309	ARK3116_SND(serial, 154, 0xFE, 0x40, config, 0x0003);
815ddc99 GKH	310
815ddc99 GKH	311	if (cflag & CRTSCTS)
988440e7	312	dbg("CRTSCTS not supported by chipset?!");
815ddc99	313
988440e7	314	/* TEST ARK3116_SND(154, 0xFE, 0x40, 0xFFFF, 0x0006); */
815ddc99 GKH	315
815ddc99 GKH	316	kfree(buf);
adb5dca1	317
815ddc99 GKH	318	return;
	319	}
	320
a509a7e4	321	static int ark3116_open(struct tty_struct tty, struct usb_serial_port port)
815ddc99	322	{
606d099c	323	struct ktermios tmp_termios;
815ddc99 GKH	324	struct usb_serial *serial = port->serial;
	325	char *buf;
	326	int result = 0;
	327
441b62c1	328	dbg("%s - port %d", __func__, port->number);
815ddc99 GKH	329
	330	buf = kmalloc(1, GFP_KERNEL);
	331	if (!buf) {
988440e7	332	dbg("error kmalloc -> out of mem?");
815ddc99 GKH	333	return -ENOMEM;
	334	}
	335
a509a7e4	336	result = usb_serial_generic_open(tty, port);
815ddc99	337	if (result)
4edf2c83	338	goto err_out;
815ddc99 GKH	339
815ddc99 GKH	340	/* open */
988440e7	341	ARK3116_RCV(serial, 111, 0xFE, 0xC0, 0x0000, 0x0003, 0x02, buf);
815ddc99	342
988440e7 WL	343	ARK3116_SND(serial, 112, 0xFE, 0x40, 0x0082, 0x0003);
	344	ARK3116_SND(serial, 113, 0xFE, 0x40, 0x001A, 0x0000);
	345	ARK3116_SND(serial, 114, 0xFE, 0x40, 0x0000, 0x0001);
	346	ARK3116_SND(serial, 115, 0xFE, 0x40, 0x0002, 0x0003);
815ddc99	347
988440e7 WL	348	ARK3116_RCV(serial, 116, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
988440e7 WL	349	ARK3116_SND(serial, 117, 0xFE, 0x40, 0x0002, 0x0004);
815ddc99	350
988440e7 WL	351	ARK3116_RCV(serial, 118, 0xFE, 0xC0, 0x0000, 0x0004, 0x02, buf);
988440e7 WL	352	ARK3116_SND(serial, 119, 0xFE, 0x40, 0x0000, 0x0004);
815ddc99	353
988440e7	354	ARK3116_RCV(serial, 120, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
815ddc99	355
988440e7	356	ARK3116_SND(serial, 121, 0xFE, 0x40, 0x0001, 0x0004);
815ddc99	357
988440e7	358	ARK3116_RCV(serial, 122, 0xFE, 0xC0, 0x0000, 0x0004, 0x01, buf);
815ddc99	359
988440e7	360	ARK3116_SND(serial, 123, 0xFE, 0x40, 0x0003, 0x0004);
815ddc99	361
988440e7 WL	362	/* returns different values (control lines?!) */
988440e7 WL	363	ARK3116_RCV(serial, 124, 0xFE, 0xC0, 0x0000, 0x0006, 0xFF, buf);
815ddc99	364
988440e7	365	/* initialise termios */
95da310e AC	366	if (tty)
95da310e AC	367	ark3116_set_termios(tty, port, &tmp_termios);
815ddc99	368
4edf2c83	369	err_out:
815ddc99 GKH	370	kfree(buf);
	371
	372	return result;
815ddc99 GKH	373	}
815ddc99 GKH	374
95da310e	375	static int ark3116_ioctl(struct tty_struct tty, struct file file,
815ddc99 GKH	376	unsigned int cmd, unsigned long arg)
815ddc99 GKH	377	{
95da310e	378	struct usb_serial_port *port = tty->driver_data;
2f430b4b WL	379	struct serial_struct serstruct;
	380	void __user user_arg = (void __user )arg;
	381
	382	switch (cmd) {
	383	case TIOCGSERIAL:
	384	/* XXX: Some of these values are probably wrong. */
c4d0f8cb	385	memset(&serstruct, 0, sizeof(serstruct));
2f430b4b WL	386	serstruct.type = PORT_16654;
	387	serstruct.line = port->serial->minor;
	388	serstruct.port = port->number;
	389	serstruct.custom_divisor = 0;
	390	serstruct.baud_base = 460800;
	391
c4d0f8cb	392	if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
2f430b4b WL	393	return -EFAULT;
	394
	395	return 0;
	396	case TIOCSSERIAL:
c4d0f8cb	397	if (copy_from_user(&serstruct, user_arg, sizeof(serstruct)))
2f430b4b WL	398	return -EFAULT;
	399	return 0;
	400	default:
441b62c1	401	dbg("%s cmd 0x%04x not supported", __func__, cmd);
2f430b4b WL	402	break;
	403	}
	404
815ddc99 GKH	405	return -ENOIOCTLCMD;
	406	}
	407
95da310e	408	static int ark3116_tiocmget(struct tty_struct tty, struct file file)
815ddc99	409	{
95da310e	410	struct usb_serial_port *port = tty->driver_data;
815ddc99 GKH	411	struct usb_serial *serial = port->serial;
	412	char *buf;
	413	char temp;
	414
988440e7	415	/* seems like serial port status info (RTS, CTS, ...) is stored
815ddc99 GKH	416	* in reg(?) 0x0006
	417	* pcb connection point 11 = GND -> sets bit4 of response
	418	* pcb connection point 7 = GND -> sets bit6 of response
	419	*/
	420
	421	buf = kmalloc(1, GFP_KERNEL);
	422	if (!buf) {
	423	dbg("error kmalloc");
	424	return -ENOMEM;
	425	}
	426
988440e7 WL	427	/* read register */
988440e7 WL	428	ARK3116_RCV_QUIET(serial, 0xFE, 0xC0, 0x0000, 0x0006, buf);
815ddc99 GKH	429	temp = buf[0];
	430	kfree(buf);
	431
988440e7 WL	432	/* i do not really know if bit4=CTS and bit6=DSR... just a
988440e7 WL	433	* quick guess!
815ddc99	434	*/
988440e7 WL	435	return (temp & (1<<4) ? TIOCM_CTS : 0)
988440e7 WL	436	\| (temp & (1<<6) ? TIOCM_DSR : 0);
815ddc99 GKH	437	}
	438
	439	static struct usb_driver ark3116_driver = {
	440	.name = "ark3116",
	441	.probe = usb_serial_probe,
	442	.disconnect = usb_serial_disconnect,
	443	.id_table = id_table,
d9b1b787	444	.no_dynamic_id = 1,
815ddc99 GKH	445	};
	446
	447	static struct usb_serial_driver ark3116_device = {
	448	.driver = {
	449	.owner = THIS_MODULE,
	450	.name = "ark3116",
	451	},
	452	.id_table = id_table,
d9b1b787	453	.usb_driver = &ark3116_driver,
815ddc99 GKH	454	.num_ports = 1,
	455	.attach = ark3116_attach,
	456	.set_termios = ark3116_set_termios,
	457	.ioctl = ark3116_ioctl,
	458	.tiocmget = ark3116_tiocmget,
	459	.open = ark3116_open,
	460	};
	461
	462	static int __init ark3116_init(void)
	463	{
	464	int retval;
	465
	466	retval = usb_serial_register(&ark3116_device);
	467	if (retval)
	468	return retval;
	469	retval = usb_register(&ark3116_driver);
	470	if (retval)
	471	usb_serial_deregister(&ark3116_device);
	472	return retval;
	473	}
	474
	475	static void __exit ark3116_exit(void)
	476	{
	477	usb_deregister(&ark3116_driver);
	478	usb_serial_deregister(&ark3116_device);
	479	}
	480
	481	module_init(ark3116_init);
	482	module_exit(ark3116_exit);
	483	MODULE_LICENSE("GPL");
	484
	485	module_param(debug, bool, S_IRUGO \| S_IWUSR);
	486	MODULE_PARM_DESC(debug, "Debug enabled or not");
	487