[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 <asm/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)
		usb_set_serial_port_data(serial->port[i], NULL);
	return -ENOMEM;
}

static void ark3116_set_termios(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);
	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);

	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;

	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:
			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(port->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:
			break;
		/* set 9600 as default (if given baudrate is invalid for example) */
		default:
			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 usb_serial_port *port, struct file *filp)
{
	struct ktermios 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)
		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 (port->tty)
		ark3116_set_termios(port, &tmp_termios);

err_out:
	kfree(buf);

	return result;
}

static int ark3116_ioctl(struct usb_serial_port *port, struct file *file,
			 unsigned int cmd, unsigned long arg)
{
	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;
	}

	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... 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_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");
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 WL	26	#include <linux/serial.h>
2f430b4b WL	27	#include <asm/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:
988440e7	154	for (--i; i >= 0; --i)
815ddc99 GKH	155	usb_set_serial_port_data(serial->port[i], NULL);
	156	return -ENOMEM;
	157	}
	158
	159	static void ark3116_set_termios(struct usb_serial_port *port,
606d099c	160	struct ktermios *old_termios)
815ddc99 GKH	161	{
	162	struct usb_serial *serial = port->serial;
	163	struct ark3116_private *priv = usb_get_serial_port_data(port);
	164	unsigned int cflag = port->tty->termios->c_cflag;
	165	unsigned long flags;
	166	int baud;
	167	int ark3116_baud;
	168	char *buf;
	169	char config;
	170
	171	config = 0;
	172
	173	dbg("%s - port %d", __FUNCTION__, port->number);
	174
815ddc99 GKH	175	spin_lock_irqsave(&priv->lock, flags);
	176	if (!priv->termios_initialized) {
	177	*(port->tty->termios) = tty_std_termios;
988440e7 WL	178	port->tty->termios->c_cflag = B9600 \| CS8
988440e7 WL	179	\| CREAD \| HUPCL \| CLOCAL;
815ddc99 GKH	180	priv->termios_initialized = 1;
	181	}
	182	spin_unlock_irqrestore(&priv->lock, flags);
	183
	184	cflag = port->tty->termios->c_cflag;
	185
815ddc99 GKH	186	buf = kmalloc(1, GFP_KERNEL);
	187	if (!buf) {
	188	dbg("error kmalloc");
	189	return;
	190	}
	191
	192	/* set data bit count (8/7/6/5) */
988440e7 WL	193	if (cflag & CSIZE) {
988440e7 WL	194	switch (cflag & CSIZE) {
815ddc99 GKH	195	case CS5:
	196	config \|= 0x00;
	197	dbg("setting CS5");
	198	break;
	199	case CS6:
	200	config \|= 0x01;
	201	dbg("setting CS6");
	202	break;
	203	case CS7:
	204	config \|= 0x02;
	205	dbg("setting CS7");
	206	break;
	207	default:
568c24ad	208	dbg("CSIZE was set but not CS5-CS8, using CS8!");
988440e7	209	/* fall through */
815ddc99 GKH	210	case CS8:
	211	config \|= 0x03;
	212	dbg("setting CS8");
	213	break;
	214	}
	215	}
	216
988440e7 WL	217	/* set parity (NONE/EVEN/ODD) */
988440e7 WL	218	if (cflag & PARENB) {
815ddc99 GKH	219	if (cflag & PARODD) {
	220	config \|= 0x08;
	221	dbg("setting parity to ODD");
	222	} else {
	223	config \|= 0x18;
	224	dbg("setting parity to EVEN");
	225	}
	226	} else {
	227	dbg("setting parity to NONE");
	228	}
	229
988440e7	230	/* set stop bit (1/2) */
815ddc99 GKH	231	if (cflag & CSTOPB) {
815ddc99 GKH	232	config \|= 0x04;
988440e7	233	dbg("setting 2 stop bits");
815ddc99	234	} else {
988440e7	235	dbg("setting 1 stop bit");
815ddc99 GKH	236	}
815ddc99 GKH	237
988440e7	238	/* set baudrate */
568c24ad AC	239	baud = tty_get_baud_rate(port->tty);
	240
	241	switch (baud) {
	242	case 75:
	243	case 150:
	244	case 300:
	245	case 600:
	246	case 1200:
	247	case 1800:
	248	case 2400:
	249	case 4800:
	250	case 9600:
	251	case 19200:
	252	case 38400:
	253	case 57600:
	254	case 115200:
	255	case 230400:
	256	case 460800:
815ddc99	257	break;
568c24ad	258	/* set 9600 as default (if given baudrate is invalid for example) */
815ddc99	259	default:
568c24ad	260	baud = 9600;
815ddc99 GKH	261	}
815ddc99 GKH	262
815ddc99 GKH	263	/*
815ddc99 GKH	264	* found by try'n'error, be careful, maybe there are other options
568c24ad	265	* for multiplicator etc! (3.5 for example)
815ddc99 GKH	266	*/
	267	if (baud == 460800)
	268	/* strange, for 460800 the formula is wrong
988440e7	269	* if using round() then 9600baud is wrong) */
815ddc99 GKH	270	ark3116_baud = 7;
	271	else
	272	ark3116_baud = 3000000 / baud;
	273
	274	/* ? */
988440e7 WL	275	ARK3116_RCV(serial, 0, 0xFE, 0xC0, 0x0000, 0x0003, 0x03, buf);
988440e7 WL	276
815ddc99 GKH	277	/* offset = buf[0]; */
815ddc99 GKH	278	/* offset = 0x03; */
988440e7	279	/* dbg("using 0x%04X as target for 0x0003:", 0x0080 + offset); */
815ddc99 GKH	280
815ddc99 GKH	281	/* set baudrate */
988440e7 WL	282	dbg("setting baudrate to %d (->reg=%d)", baud, ark3116_baud);
	283	ARK3116_SND(serial, 147, 0xFE, 0x40, 0x0083, 0x0003);
	284	ARK3116_SND(serial, 148, 0xFE, 0x40,
	285	(ark3116_baud & 0x00FF), 0x0000);
	286	ARK3116_SND(serial, 149, 0xFE, 0x40,
	287	(ark3116_baud & 0xFF00) >> 8, 0x0001);
	288	ARK3116_SND(serial, 150, 0xFE, 0x40, 0x0003, 0x0003);
815ddc99 GKH	289
815ddc99 GKH	290	/* ? */
988440e7 WL	291	ARK3116_RCV(serial, 151, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
988440e7 WL	292	ARK3116_SND(serial, 152, 0xFE, 0x40, 0x0000, 0x0003);
815ddc99 GKH	293
	294	/* set data bit count, stop bit count & parity: */
	295	dbg("updating bit count, stop bit or parity (cfg=0x%02X)", config);
988440e7 WL	296	ARK3116_RCV(serial, 153, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
988440e7 WL	297	ARK3116_SND(serial, 154, 0xFE, 0x40, config, 0x0003);
815ddc99 GKH	298
815ddc99 GKH	299	if (cflag & CRTSCTS)
988440e7	300	dbg("CRTSCTS not supported by chipset?!");
815ddc99	301
988440e7	302	/* TEST ARK3116_SND(154, 0xFE, 0x40, 0xFFFF, 0x0006); */
815ddc99 GKH	303
	304	kfree(buf);
	305	return;
	306	}
	307
	308	static int ark3116_open(struct usb_serial_port port, struct file filp)
	309	{
606d099c	310	struct ktermios tmp_termios;
815ddc99 GKH	311	struct usb_serial *serial = port->serial;
	312	char *buf;
	313	int result = 0;
	314
988440e7	315	dbg("%s - port %d", __FUNCTION__, port->number);
815ddc99 GKH	316
	317	buf = kmalloc(1, GFP_KERNEL);
	318	if (!buf) {
988440e7	319	dbg("error kmalloc -> out of mem?");
815ddc99 GKH	320	return -ENOMEM;
	321	}
	322
	323	result = usb_serial_generic_open(port, filp);
	324	if (result)
4edf2c83	325	goto err_out;
815ddc99 GKH	326
815ddc99 GKH	327	/* open */
988440e7	328	ARK3116_RCV(serial, 111, 0xFE, 0xC0, 0x0000, 0x0003, 0x02, buf);
815ddc99	329
988440e7 WL	330	ARK3116_SND(serial, 112, 0xFE, 0x40, 0x0082, 0x0003);
	331	ARK3116_SND(serial, 113, 0xFE, 0x40, 0x001A, 0x0000);
	332	ARK3116_SND(serial, 114, 0xFE, 0x40, 0x0000, 0x0001);
	333	ARK3116_SND(serial, 115, 0xFE, 0x40, 0x0002, 0x0003);
815ddc99	334
988440e7 WL	335	ARK3116_RCV(serial, 116, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
988440e7 WL	336	ARK3116_SND(serial, 117, 0xFE, 0x40, 0x0002, 0x0004);
815ddc99	337
988440e7 WL	338	ARK3116_RCV(serial, 118, 0xFE, 0xC0, 0x0000, 0x0004, 0x02, buf);
988440e7 WL	339	ARK3116_SND(serial, 119, 0xFE, 0x40, 0x0000, 0x0004);
815ddc99	340
988440e7	341	ARK3116_RCV(serial, 120, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
815ddc99	342
988440e7	343	ARK3116_SND(serial, 121, 0xFE, 0x40, 0x0001, 0x0004);
815ddc99	344
988440e7	345	ARK3116_RCV(serial, 122, 0xFE, 0xC0, 0x0000, 0x0004, 0x01, buf);
815ddc99	346
988440e7	347	ARK3116_SND(serial, 123, 0xFE, 0x40, 0x0003, 0x0004);
815ddc99	348
988440e7 WL	349	/* returns different values (control lines?!) */
988440e7 WL	350	ARK3116_RCV(serial, 124, 0xFE, 0xC0, 0x0000, 0x0006, 0xFF, buf);
815ddc99	351
988440e7	352	/* initialise termios */
815ddc99 GKH	353	if (port->tty)
	354	ark3116_set_termios(port, &tmp_termios);
	355
4edf2c83	356	err_out:
815ddc99 GKH	357	kfree(buf);
	358
	359	return result;
815ddc99 GKH	360	}
	361
	362	static int ark3116_ioctl(struct usb_serial_port port, struct file file,
	363	unsigned int cmd, unsigned long arg)
	364	{
2f430b4b WL	365	struct serial_struct serstruct;
	366	void __user user_arg = (void __user )arg;
	367
	368	switch (cmd) {
	369	case TIOCGSERIAL:
	370	/* XXX: Some of these values are probably wrong. */
	371	memset(&serstruct, 0, sizeof (serstruct));
	372	serstruct.type = PORT_16654;
	373	serstruct.line = port->serial->minor;
	374	serstruct.port = port->number;
	375	serstruct.custom_divisor = 0;
	376	serstruct.baud_base = 460800;
	377
	378	if (copy_to_user(user_arg, &serstruct, sizeof (serstruct)))
	379	return -EFAULT;
	380
	381	return 0;
	382	case TIOCSSERIAL:
	383	if (copy_from_user(&serstruct, user_arg, sizeof (serstruct)))
	384	return -EFAULT;
	385	return 0;
	386	default:
	387	dbg("%s cmd 0x%04x not supported", __FUNCTION__, cmd);
	388	break;
	389	}
	390
815ddc99 GKH	391	return -ENOIOCTLCMD;
	392	}
	393
	394	static int ark3116_tiocmget(struct usb_serial_port port, struct file file)
	395	{
	396	struct usb_serial *serial = port->serial;
	397	char *buf;
	398	char temp;
	399
988440e7	400	/* seems like serial port status info (RTS, CTS, ...) is stored
815ddc99 GKH	401	* in reg(?) 0x0006
	402	* pcb connection point 11 = GND -> sets bit4 of response
	403	* pcb connection point 7 = GND -> sets bit6 of response
	404	*/
	405
	406	buf = kmalloc(1, GFP_KERNEL);
	407	if (!buf) {
	408	dbg("error kmalloc");
	409	return -ENOMEM;
	410	}
	411
988440e7 WL	412	/* read register */
988440e7 WL	413	ARK3116_RCV_QUIET(serial, 0xFE, 0xC0, 0x0000, 0x0006, buf);
815ddc99 GKH	414	temp = buf[0];
	415	kfree(buf);
	416
988440e7 WL	417	/* i do not really know if bit4=CTS and bit6=DSR... just a
988440e7 WL	418	* quick guess!
815ddc99	419	*/
988440e7 WL	420	return (temp & (1<<4) ? TIOCM_CTS : 0)
988440e7 WL	421	\| (temp & (1<<6) ? TIOCM_DSR : 0);
815ddc99 GKH	422	}
	423
	424	static struct usb_driver ark3116_driver = {
	425	.name = "ark3116",
	426	.probe = usb_serial_probe,
	427	.disconnect = usb_serial_disconnect,
	428	.id_table = id_table,
d9b1b787	429	.no_dynamic_id = 1,
815ddc99 GKH	430	};
	431
	432	static struct usb_serial_driver ark3116_device = {
	433	.driver = {
	434	.owner = THIS_MODULE,
	435	.name = "ark3116",
	436	},
	437	.id_table = id_table,
d9b1b787	438	.usb_driver = &ark3116_driver,
815ddc99 GKH	439	.num_interrupt_in = 1,
	440	.num_bulk_in = 1,
	441	.num_bulk_out = 1,
	442	.num_ports = 1,
	443	.attach = ark3116_attach,
	444	.set_termios = ark3116_set_termios,
	445	.ioctl = ark3116_ioctl,
	446	.tiocmget = ark3116_tiocmget,
	447	.open = ark3116_open,
	448	};
	449
	450	static int __init ark3116_init(void)
	451	{
	452	int retval;
	453
	454	retval = usb_serial_register(&ark3116_device);
	455	if (retval)
	456	return retval;
	457	retval = usb_register(&ark3116_driver);
	458	if (retval)
	459	usb_serial_deregister(&ark3116_device);
	460	return retval;
	461	}
	462
	463	static void __exit ark3116_exit(void)
	464	{
	465	usb_deregister(&ark3116_driver);
	466	usb_serial_deregister(&ark3116_device);
	467	}
	468
	469	module_init(ark3116_init);
	470	module_exit(ark3116_exit);
	471	MODULE_LICENSE("GPL");
	472
	473	module_param(debug, bool, S_IRUGO \| S_IWUSR);
	474	MODULE_PARM_DESC(debug, "Debug enabled or not");
	475