[deliverable/linux.git] / drivers / usb / serial / ssu100.c

/*
 * usb-serial driver for Quatech SSU-100
 *
 * based on ftdi_sio.c and the original serqt_usb.c from Quatech
 *
 */

#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/serial.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#include <linux/serial_reg.h>
#include <linux/uaccess.h>

#define QT_OPEN_CLOSE_CHANNEL       0xca
#define QT_SET_GET_DEVICE           0xc2
#define QT_SET_GET_REGISTER         0xc0
#define QT_GET_SET_PREBUF_TRIG_LVL  0xcc
#define QT_SET_ATF                  0xcd
#define QT_GET_SET_UART             0xc1
#define QT_TRANSFER_IN              0xc0
#define QT_HW_FLOW_CONTROL_MASK     0xc5
#define QT_SW_FLOW_CONTROL_MASK     0xc6

#define  SERIAL_MSR_MASK            0xf0

#define  SERIAL_CRTSCTS ((UART_MCR_RTS << 8) | UART_MSR_CTS)

#define  SERIAL_EVEN_PARITY         (UART_LCR_PARITY | UART_LCR_EPAR)

#define  MAX_BAUD_RATE              460800

#define ATC_DISABLED                0x00
#define DUPMODE_BITS        0xc0
#define RR_BITS             0x03
#define LOOPMODE_BITS       0x41
#define RS232_MODE          0x00
#define RTSCTS_TO_CONNECTOR 0x40
#define CLKS_X4             0x02
#define FULLPWRBIT          0x00000080
#define NEXT_BOARD_POWER_BIT        0x00000004

#define DRIVER_DESC "Quatech SSU-100 USB to Serial Driver"

#define	USB_VENDOR_ID_QUATECH	0x061d	/* Quatech VID */
#define QUATECH_SSU100	0xC020	/* SSU100 */

static const struct usb_device_id id_table[] = {
	{USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100)},
	{}			/* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, id_table);

struct ssu100_port_private {
	spinlock_t status_lock;
	u8 shadowLSR;
	u8 shadowMSR;
};

static inline int ssu100_control_msg(struct usb_device *dev,
				     u8 request, u16 data, u16 index)
{
	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
			       request, 0x40, data, index,
			       NULL, 0, 300);
}

static inline int ssu100_setdevice(struct usb_device *dev, u8 *data)
{
	u16 x = ((u16)(data[1] << 8) | (u16)(data[0]));

	return ssu100_control_msg(dev, QT_SET_GET_DEVICE, x, 0);
}


static inline int ssu100_getdevice(struct usb_device *dev, u8 *data)
{
	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
			       QT_SET_GET_DEVICE, 0xc0, 0, 0,
			       data, 3, 300);
}

static inline int ssu100_getregister(struct usb_device *dev,
				     unsigned short uart,
				     unsigned short reg,
				     u8 *data)
{
	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
			       QT_SET_GET_REGISTER, 0xc0, reg,
			       uart, data, sizeof(*data), 300);

}


static inline int ssu100_setregister(struct usb_device *dev,
				     unsigned short uart,
				     unsigned short reg,
				     u16 data)
{
	u16 value = (data << 8) | reg;

	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
			       QT_SET_GET_REGISTER, 0x40, value, uart,
			       NULL, 0, 300);

}

#define set_mctrl(dev, set)		update_mctrl((dev), (set), 0)
#define clear_mctrl(dev, clear)	update_mctrl((dev), 0, (clear))

/* these do not deal with device that have more than 1 port */
static inline int update_mctrl(struct usb_device *dev, unsigned int set,
			       unsigned int clear)
{
	unsigned urb_value;
	int result;

	if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
		dev_dbg(&dev->dev, "%s - DTR|RTS not being set|cleared\n", __func__);
		return 0;	/* no change */
	}

	clear &= ~set;	/* 'set' takes precedence over 'clear' */
	urb_value = 0;
	if (set & TIOCM_DTR)
		urb_value |= UART_MCR_DTR;
	if (set & TIOCM_RTS)
		urb_value |= UART_MCR_RTS;

	result = ssu100_setregister(dev, 0, UART_MCR, urb_value);
	if (result < 0)
		dev_dbg(&dev->dev, "%s Error from MODEM_CTRL urb\n", __func__);

	return result;
}

static int ssu100_initdevice(struct usb_device *dev)
{
	u8 *data;
	int result = 0;

	data = kzalloc(3, GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	result = ssu100_getdevice(dev, data);
	if (result < 0) {
		dev_dbg(&dev->dev, "%s - get_device failed %i\n", __func__, result);
		goto out;
	}

	data[1] &= ~FULLPWRBIT;

	result = ssu100_setdevice(dev, data);
	if (result < 0) {
		dev_dbg(&dev->dev, "%s - setdevice failed %i\n", __func__, result);
		goto out;
	}

	result = ssu100_control_msg(dev, QT_GET_SET_PREBUF_TRIG_LVL, 128, 0);
	if (result < 0) {
		dev_dbg(&dev->dev, "%s - set prebuffer level failed %i\n", __func__, result);
		goto out;
	}

	result = ssu100_control_msg(dev, QT_SET_ATF, ATC_DISABLED, 0);
	if (result < 0) {
		dev_dbg(&dev->dev, "%s - set ATFprebuffer level failed %i\n", __func__, result);
		goto out;
	}

	result = ssu100_getdevice(dev, data);
	if (result < 0) {
		dev_dbg(&dev->dev, "%s - get_device failed %i\n", __func__, result);
		goto out;
	}

	data[0] &= ~(RR_BITS | DUPMODE_BITS);
	data[0] |= CLKS_X4;
	data[1] &= ~(LOOPMODE_BITS);
	data[1] |= RS232_MODE;

	result = ssu100_setdevice(dev, data);
	if (result < 0) {
		dev_dbg(&dev->dev, "%s - setdevice failed %i\n", __func__, result);
		goto out;
	}

out:	kfree(data);
	return result;

}


static void ssu100_set_termios(struct tty_struct *tty,
			       struct usb_serial_port *port,
			       struct ktermios *old_termios)
{
	struct usb_device *dev = port->serial->dev;
	struct ktermios *termios = &tty->termios;
	u16 baud, divisor, remainder;
	unsigned int cflag = termios->c_cflag;
	u16 urb_value = 0; /* will hold the new flags */
	int result;

	if (cflag & PARENB) {
		if (cflag & PARODD)
			urb_value |= UART_LCR_PARITY;
		else
			urb_value |= SERIAL_EVEN_PARITY;
	}

	switch (cflag & CSIZE) {
	case CS5:
		urb_value |= UART_LCR_WLEN5;
		break;
	case CS6:
		urb_value |= UART_LCR_WLEN6;
		break;
	case CS7:
		urb_value |= UART_LCR_WLEN7;
		break;
	default:
	case CS8:
		urb_value |= UART_LCR_WLEN8;
		break;
	}

	baud = tty_get_baud_rate(tty);
	if (!baud)
		baud = 9600;

	dev_dbg(&port->dev, "%s - got baud = %d\n", __func__, baud);


	divisor = MAX_BAUD_RATE / baud;
	remainder = MAX_BAUD_RATE % baud;
	if (((remainder * 2) >= baud) && (baud != 110))
		divisor++;

	urb_value = urb_value << 8;

	result = ssu100_control_msg(dev, QT_GET_SET_UART, divisor, urb_value);
	if (result < 0)
		dev_dbg(&port->dev, "%s - set uart failed\n", __func__);

	if (cflag & CRTSCTS)
		result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
					    SERIAL_CRTSCTS, 0);
	else
		result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
					    0, 0);
	if (result < 0)
		dev_dbg(&port->dev, "%s - set HW flow control failed\n", __func__);

	if (I_IXOFF(tty) || I_IXON(tty)) {
		u16 x = ((u16)(START_CHAR(tty) << 8) | (u16)(STOP_CHAR(tty)));

		result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
					    x, 0);
	} else
		result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
					    0, 0);

	if (result < 0)
		dev_dbg(&port->dev, "%s - set SW flow control failed\n", __func__);

}


static int ssu100_open(struct tty_struct *tty, struct usb_serial_port *port)
{
	struct usb_device *dev = port->serial->dev;
	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	u8 *data;
	int result;
	unsigned long flags;

	data = kzalloc(2, GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
				 QT_OPEN_CLOSE_CHANNEL,
				 QT_TRANSFER_IN, 0x01,
				 0, data, 2, 300);
	if (result < 0) {
		dev_dbg(&port->dev, "%s - open failed %i\n", __func__, result);
		kfree(data);
		return result;
	}

	spin_lock_irqsave(&priv->status_lock, flags);
	priv->shadowLSR = data[0];
	priv->shadowMSR = data[1];
	spin_unlock_irqrestore(&priv->status_lock, flags);

	kfree(data);

/* set to 9600 */
	result = ssu100_control_msg(dev, QT_GET_SET_UART, 0x30, 0x0300);
	if (result < 0)
		dev_dbg(&port->dev, "%s - set uart failed\n", __func__);

	if (tty)
		ssu100_set_termios(tty, port, &tty->termios);

	return usb_serial_generic_open(tty, port);
}

static int get_serial_info(struct usb_serial_port *port,
			   struct serial_struct __user *retinfo)
{
	struct serial_struct tmp;

	if (!retinfo)
		return -EFAULT;

	memset(&tmp, 0, sizeof(tmp));
	tmp.line		= port->minor;
	tmp.port		= 0;
	tmp.irq			= 0;
	tmp.flags		= ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
	tmp.xmit_fifo_size	= port->bulk_out_size;
	tmp.baud_base		= 9600;
	tmp.close_delay		= 5*HZ;
	tmp.closing_wait	= 30*HZ;

	if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
		return -EFAULT;
	return 0;
}

static int ssu100_ioctl(struct tty_struct *tty,
		    unsigned int cmd, unsigned long arg)
{
	struct usb_serial_port *port = tty->driver_data;

	switch (cmd) {
	case TIOCGSERIAL:
		return get_serial_info(port,
				       (struct serial_struct __user *) arg);
	default:
		break;
	}

	return -ENOIOCTLCMD;
}

static int ssu100_attach(struct usb_serial *serial)
{
	return ssu100_initdevice(serial->dev);
}

static int ssu100_port_probe(struct usb_serial_port *port)
{
	struct ssu100_port_private *priv;

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	spin_lock_init(&priv->status_lock);

	usb_set_serial_port_data(port, priv);

	return 0;
}

static int ssu100_port_remove(struct usb_serial_port *port)
{
	struct ssu100_port_private *priv;

	priv = usb_get_serial_port_data(port);
	kfree(priv);

	return 0;
}

static int ssu100_tiocmget(struct tty_struct *tty)
{
	struct usb_serial_port *port = tty->driver_data;
	struct usb_device *dev = port->serial->dev;
	u8 *d;
	int r;

	d = kzalloc(2, GFP_KERNEL);
	if (!d)
		return -ENOMEM;

	r = ssu100_getregister(dev, 0, UART_MCR, d);
	if (r < 0)
		goto mget_out;

	r = ssu100_getregister(dev, 0, UART_MSR, d+1);
	if (r < 0)
		goto mget_out;

	r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) |
		(d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) |
		(d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) |
		(d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) |
		(d[1] & UART_MSR_RI ? TIOCM_RI : 0) |
		(d[1] & UART_MSR_DSR ? TIOCM_DSR : 0);

mget_out:
	kfree(d);
	return r;
}

static int ssu100_tiocmset(struct tty_struct *tty,
			   unsigned int set, unsigned int clear)
{
	struct usb_serial_port *port = tty->driver_data;
	struct usb_device *dev = port->serial->dev;

	return update_mctrl(dev, set, clear);
}

static void ssu100_dtr_rts(struct usb_serial_port *port, int on)
{
	struct usb_device *dev = port->serial->dev;

	/* Disable flow control */
	if (!on) {
		if (ssu100_setregister(dev, 0, UART_MCR, 0) < 0)
			dev_err(&port->dev, "error from flowcontrol urb\n");
	}
	/* drop RTS and DTR */
	if (on)
		set_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
	else
		clear_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
}

static void ssu100_update_msr(struct usb_serial_port *port, u8 msr)
{
	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;

	spin_lock_irqsave(&priv->status_lock, flags);
	priv->shadowMSR = msr;
	spin_unlock_irqrestore(&priv->status_lock, flags);

	if (msr & UART_MSR_ANY_DELTA) {
		/* update input line counters */
		if (msr & UART_MSR_DCTS)
			port->icount.cts++;
		if (msr & UART_MSR_DDSR)
			port->icount.dsr++;
		if (msr & UART_MSR_DDCD)
			port->icount.dcd++;
		if (msr & UART_MSR_TERI)
			port->icount.rng++;
		wake_up_interruptible(&port->port.delta_msr_wait);
	}
}

static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr,
			      char *tty_flag)
{
	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;

	spin_lock_irqsave(&priv->status_lock, flags);
	priv->shadowLSR = lsr;
	spin_unlock_irqrestore(&priv->status_lock, flags);

	*tty_flag = TTY_NORMAL;
	if (lsr & UART_LSR_BRK_ERROR_BITS) {
		/* we always want to update icount, but we only want to
		 * update tty_flag for one case */
		if (lsr & UART_LSR_BI) {
			port->icount.brk++;
			*tty_flag = TTY_BREAK;
			usb_serial_handle_break(port);
		}
		if (lsr & UART_LSR_PE) {
			port->icount.parity++;
			if (*tty_flag == TTY_NORMAL)
				*tty_flag = TTY_PARITY;
		}
		if (lsr & UART_LSR_FE) {
			port->icount.frame++;
			if (*tty_flag == TTY_NORMAL)
				*tty_flag = TTY_FRAME;
		}
		if (lsr & UART_LSR_OE) {
			port->icount.overrun++;
			tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
		}
	}

}

static void ssu100_process_read_urb(struct urb *urb)
{
	struct usb_serial_port *port = urb->context;
	char *packet = (char *)urb->transfer_buffer;
	char flag = TTY_NORMAL;
	u32 len = urb->actual_length;
	int i;
	char *ch;

	if ((len >= 4) &&
	    (packet[0] == 0x1b) && (packet[1] == 0x1b) &&
	    ((packet[2] == 0x00) || (packet[2] == 0x01))) {
		if (packet[2] == 0x00)
			ssu100_update_lsr(port, packet[3], &flag);
		if (packet[2] == 0x01)
			ssu100_update_msr(port, packet[3]);

		len -= 4;
		ch = packet + 4;
	} else
		ch = packet;

	if (!len)
		return;	/* status only */

	if (port->port.console && port->sysrq) {
		for (i = 0; i < len; i++, ch++) {
			if (!usb_serial_handle_sysrq_char(port, *ch))
				tty_insert_flip_char(&port->port, *ch, flag);
		}
	} else
		tty_insert_flip_string_fixed_flag(&port->port, ch, flag, len);

	tty_flip_buffer_push(&port->port);
}

static struct usb_serial_driver ssu100_device = {
	.driver = {
		.owner = THIS_MODULE,
		.name = "ssu100",
	},
	.description	     = DRIVER_DESC,
	.id_table	     = id_table,
	.num_ports	     = 1,
	.open		     = ssu100_open,
	.attach              = ssu100_attach,
	.port_probe          = ssu100_port_probe,
	.port_remove         = ssu100_port_remove,
	.dtr_rts             = ssu100_dtr_rts,
	.process_read_urb    = ssu100_process_read_urb,
	.tiocmget            = ssu100_tiocmget,
	.tiocmset            = ssu100_tiocmset,
	.tiocmiwait          = usb_serial_generic_tiocmiwait,
	.get_icount	     = usb_serial_generic_get_icount,
	.ioctl               = ssu100_ioctl,
	.set_termios         = ssu100_set_termios,
};

static struct usb_serial_driver * const serial_drivers[] = {
	&ssu100_device, NULL
};

module_usb_serial_driver(serial_drivers, id_table);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
Commit	Line	Data
	1	/*
	2	* usb-serial driver for Quatech SSU-100
	3	*
	4	* based on ftdi_sio.c and the original serqt_usb.c from Quatech
	5	*
	6	*/
	7
	8	#include <linux/errno.h>
	9	#include <linux/slab.h>
	10	#include <linux/tty.h>
	11	#include <linux/tty_driver.h>
	12	#include <linux/tty_flip.h>
	13	#include <linux/module.h>
	14	#include <linux/serial.h>
	15	#include <linux/usb.h>
	16	#include <linux/usb/serial.h>
	17	#include <linux/serial_reg.h>
	18	#include <linux/uaccess.h>
	19
	20	#define QT_OPEN_CLOSE_CHANNEL 0xca
	21	#define QT_SET_GET_DEVICE 0xc2
	22	#define QT_SET_GET_REGISTER 0xc0
	23	#define QT_GET_SET_PREBUF_TRIG_LVL 0xcc
	24	#define QT_SET_ATF 0xcd
	25	#define QT_GET_SET_UART 0xc1
	26	#define QT_TRANSFER_IN 0xc0
	27	#define QT_HW_FLOW_CONTROL_MASK 0xc5
	28	#define QT_SW_FLOW_CONTROL_MASK 0xc6
	29
	30	#define SERIAL_MSR_MASK 0xf0
	31
	32	#define SERIAL_CRTSCTS ((UART_MCR_RTS << 8) \| UART_MSR_CTS)
	33
	34	#define SERIAL_EVEN_PARITY (UART_LCR_PARITY \| UART_LCR_EPAR)
	35
	36	#define MAX_BAUD_RATE 460800
	37
	38	#define ATC_DISABLED 0x00
	39	#define DUPMODE_BITS 0xc0
	40	#define RR_BITS 0x03
	41	#define LOOPMODE_BITS 0x41
	42	#define RS232_MODE 0x00
	43	#define RTSCTS_TO_CONNECTOR 0x40
	44	#define CLKS_X4 0x02
	45	#define FULLPWRBIT 0x00000080
	46	#define NEXT_BOARD_POWER_BIT 0x00000004
	47
	48	#define DRIVER_DESC "Quatech SSU-100 USB to Serial Driver"
	49
	50	#define USB_VENDOR_ID_QUATECH 0x061d /* Quatech VID */
	51	#define QUATECH_SSU100 0xC020 /* SSU100 */
	52
	53	static const struct usb_device_id id_table[] = {
	54	{USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100)},
	55	{} /* Terminating entry */
	56	};
	57	MODULE_DEVICE_TABLE(usb, id_table);
	58
	59	struct ssu100_port_private {
	60	spinlock_t status_lock;
	61	u8 shadowLSR;
	62	u8 shadowMSR;
	63	};
	64
	65	static inline int ssu100_control_msg(struct usb_device *dev,
	66	u8 request, u16 data, u16 index)
	67	{
	68	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
	69	request, 0x40, data, index,
	70	NULL, 0, 300);
	71	}
	72
	73	static inline int ssu100_setdevice(struct usb_device dev, u8 data)
	74	{
	75	u16 x = ((u16)(data[1] << 8) \| (u16)(data[0]));
	76
	77	return ssu100_control_msg(dev, QT_SET_GET_DEVICE, x, 0);
	78	}
	79
	80
	81	static inline int ssu100_getdevice(struct usb_device dev, u8 data)
	82	{
	83	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	84	QT_SET_GET_DEVICE, 0xc0, 0, 0,
	85	data, 3, 300);
	86	}
	87
	88	static inline int ssu100_getregister(struct usb_device *dev,
	89	unsigned short uart,
	90	unsigned short reg,
	91	u8 *data)
	92	{
	93	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	94	QT_SET_GET_REGISTER, 0xc0, reg,
	95	uart, data, sizeof(*data), 300);
	96
	97	}
	98
	99
	100	static inline int ssu100_setregister(struct usb_device *dev,
	101	unsigned short uart,
	102	unsigned short reg,
	103	u16 data)
	104	{
	105	u16 value = (data << 8) \| reg;
	106
	107	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
	108	QT_SET_GET_REGISTER, 0x40, value, uart,
	109	NULL, 0, 300);
	110
	111	}
	112
	113	#define set_mctrl(dev, set) update_mctrl((dev), (set), 0)
	114	#define clear_mctrl(dev, clear) update_mctrl((dev), 0, (clear))
	115
	116	/* these do not deal with device that have more than 1 port */
	117	static inline int update_mctrl(struct usb_device *dev, unsigned int set,
	118	unsigned int clear)
	119	{
	120	unsigned urb_value;
	121	int result;
	122
	123	if (((set \| clear) & (TIOCM_DTR \| TIOCM_RTS)) == 0) {
	124	dev_dbg(&dev->dev, "%s - DTR\|RTS not being set\|cleared\n", __func__);
	125	return 0; /* no change */
	126	}
	127
	128	clear &= ~set; /* 'set' takes precedence over 'clear' */
	129	urb_value = 0;
	130	if (set & TIOCM_DTR)
	131	urb_value \|= UART_MCR_DTR;
	132	if (set & TIOCM_RTS)
	133	urb_value \|= UART_MCR_RTS;
	134
	135	result = ssu100_setregister(dev, 0, UART_MCR, urb_value);
	136	if (result < 0)
	137	dev_dbg(&dev->dev, "%s Error from MODEM_CTRL urb\n", __func__);
	138
	139	return result;
	140	}
	141
	142	static int ssu100_initdevice(struct usb_device *dev)
	143	{
	144	u8 *data;
	145	int result = 0;
	146
	147	data = kzalloc(3, GFP_KERNEL);
	148	if (!data)
	149	return -ENOMEM;
	150
	151	result = ssu100_getdevice(dev, data);
	152	if (result < 0) {
	153	dev_dbg(&dev->dev, "%s - get_device failed %i\n", __func__, result);
	154	goto out;
	155	}
	156
	157	data[1] &= ~FULLPWRBIT;
	158
	159	result = ssu100_setdevice(dev, data);
	160	if (result < 0) {
	161	dev_dbg(&dev->dev, "%s - setdevice failed %i\n", __func__, result);
	162	goto out;
	163	}
	164
	165	result = ssu100_control_msg(dev, QT_GET_SET_PREBUF_TRIG_LVL, 128, 0);
	166	if (result < 0) {
	167	dev_dbg(&dev->dev, "%s - set prebuffer level failed %i\n", __func__, result);
	168	goto out;
	169	}
	170
	171	result = ssu100_control_msg(dev, QT_SET_ATF, ATC_DISABLED, 0);
	172	if (result < 0) {
	173	dev_dbg(&dev->dev, "%s - set ATFprebuffer level failed %i\n", __func__, result);
	174	goto out;
	175	}
	176
	177	result = ssu100_getdevice(dev, data);
	178	if (result < 0) {
	179	dev_dbg(&dev->dev, "%s - get_device failed %i\n", __func__, result);
	180	goto out;
	181	}
	182
	183	data[0] &= ~(RR_BITS \| DUPMODE_BITS);
	184	data[0] \|= CLKS_X4;
	185	data[1] &= ~(LOOPMODE_BITS);
	186	data[1] \|= RS232_MODE;
	187
	188	result = ssu100_setdevice(dev, data);
	189	if (result < 0) {
	190	dev_dbg(&dev->dev, "%s - setdevice failed %i\n", __func__, result);
	191	goto out;
	192	}
	193
	194	out: kfree(data);
	195	return result;
	196
	197	}
	198
	199
	200	static void ssu100_set_termios(struct tty_struct *tty,
	201	struct usb_serial_port *port,
	202	struct ktermios *old_termios)
	203	{
	204	struct usb_device *dev = port->serial->dev;
	205	struct ktermios *termios = &tty->termios;
	206	u16 baud, divisor, remainder;
	207	unsigned int cflag = termios->c_cflag;
	208	u16 urb_value = 0; /* will hold the new flags */
	209	int result;
	210
	211	if (cflag & PARENB) {
	212	if (cflag & PARODD)
	213	urb_value \|= UART_LCR_PARITY;
	214	else
	215	urb_value \|= SERIAL_EVEN_PARITY;
	216	}
	217
	218	switch (cflag & CSIZE) {
	219	case CS5:
	220	urb_value \|= UART_LCR_WLEN5;
	221	break;
	222	case CS6:
	223	urb_value \|= UART_LCR_WLEN6;
	224	break;
	225	case CS7:
	226	urb_value \|= UART_LCR_WLEN7;
	227	break;
	228	default:
	229	case CS8:
	230	urb_value \|= UART_LCR_WLEN8;
	231	break;
	232	}
	233
	234	baud = tty_get_baud_rate(tty);
	235	if (!baud)
	236	baud = 9600;
	237
	238	dev_dbg(&port->dev, "%s - got baud = %d\n", __func__, baud);
	239
	240
	241	divisor = MAX_BAUD_RATE / baud;
	242	remainder = MAX_BAUD_RATE % baud;
	243	if (((remainder * 2) >= baud) && (baud != 110))
	244	divisor++;
	245
	246	urb_value = urb_value << 8;
	247
	248	result = ssu100_control_msg(dev, QT_GET_SET_UART, divisor, urb_value);
	249	if (result < 0)
	250	dev_dbg(&port->dev, "%s - set uart failed\n", __func__);
	251
	252	if (cflag & CRTSCTS)
	253	result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
	254	SERIAL_CRTSCTS, 0);
	255	else
	256	result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
	257	0, 0);
	258	if (result < 0)
	259	dev_dbg(&port->dev, "%s - set HW flow control failed\n", __func__);
	260
	261	if (I_IXOFF(tty) \|\| I_IXON(tty)) {
	262	u16 x = ((u16)(START_CHAR(tty) << 8) \| (u16)(STOP_CHAR(tty)));
	263
	264	result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
	265	x, 0);
	266	} else
	267	result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
	268	0, 0);
	269
	270	if (result < 0)
	271	dev_dbg(&port->dev, "%s - set SW flow control failed\n", __func__);
	272
	273	}
	274
	275
	276	static int ssu100_open(struct tty_struct tty, struct usb_serial_port port)
	277	{
	278	struct usb_device *dev = port->serial->dev;
	279	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	280	u8 *data;
	281	int result;
	282	unsigned long flags;
	283
	284	data = kzalloc(2, GFP_KERNEL);
	285	if (!data)
	286	return -ENOMEM;
	287
	288	result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	289	QT_OPEN_CLOSE_CHANNEL,
	290	QT_TRANSFER_IN, 0x01,
	291	0, data, 2, 300);
	292	if (result < 0) {
	293	dev_dbg(&port->dev, "%s - open failed %i\n", __func__, result);
	294	kfree(data);
	295	return result;
	296	}
	297
	298	spin_lock_irqsave(&priv->status_lock, flags);
	299	priv->shadowLSR = data[0];
	300	priv->shadowMSR = data[1];
	301	spin_unlock_irqrestore(&priv->status_lock, flags);
	302
	303	kfree(data);
	304
	305	/* set to 9600 */
	306	result = ssu100_control_msg(dev, QT_GET_SET_UART, 0x30, 0x0300);
	307	if (result < 0)
	308	dev_dbg(&port->dev, "%s - set uart failed\n", __func__);
	309
	310	if (tty)
	311	ssu100_set_termios(tty, port, &tty->termios);
	312
	313	return usb_serial_generic_open(tty, port);
	314	}
	315
	316	static int get_serial_info(struct usb_serial_port *port,
	317	struct serial_struct __user *retinfo)
	318	{
	319	struct serial_struct tmp;
	320
	321	if (!retinfo)
	322	return -EFAULT;
	323
	324	memset(&tmp, 0, sizeof(tmp));
	325	tmp.line = port->minor;
	326	tmp.port = 0;
	327	tmp.irq = 0;
	328	tmp.flags = ASYNC_SKIP_TEST \| ASYNC_AUTO_IRQ;
	329	tmp.xmit_fifo_size = port->bulk_out_size;
	330	tmp.baud_base = 9600;
	331	tmp.close_delay = 5*HZ;
	332	tmp.closing_wait = 30*HZ;
	333
	334	if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
	335	return -EFAULT;
	336	return 0;
	337	}
	338
	339	static int ssu100_ioctl(struct tty_struct *tty,
	340	unsigned int cmd, unsigned long arg)
	341	{
	342	struct usb_serial_port *port = tty->driver_data;
	343
	344	switch (cmd) {
	345	case TIOCGSERIAL:
	346	return get_serial_info(port,
	347	(struct serial_struct __user *) arg);
	348	default:
	349	break;
	350	}
	351
	352	return -ENOIOCTLCMD;
	353	}
	354
	355	static int ssu100_attach(struct usb_serial *serial)
	356	{
	357	return ssu100_initdevice(serial->dev);
	358	}
	359
	360	static int ssu100_port_probe(struct usb_serial_port *port)
	361	{
	362	struct ssu100_port_private *priv;
	363
	364	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	365	if (!priv)
	366	return -ENOMEM;
	367
	368	spin_lock_init(&priv->status_lock);
	369
	370	usb_set_serial_port_data(port, priv);
	371
	372	return 0;
	373	}
	374
	375	static int ssu100_port_remove(struct usb_serial_port *port)
	376	{
	377	struct ssu100_port_private *priv;
	378
	379	priv = usb_get_serial_port_data(port);
	380	kfree(priv);
	381
	382	return 0;
	383	}
	384
	385	static int ssu100_tiocmget(struct tty_struct *tty)
	386	{
	387	struct usb_serial_port *port = tty->driver_data;
	388	struct usb_device *dev = port->serial->dev;
	389	u8 *d;
	390	int r;
	391
	392	d = kzalloc(2, GFP_KERNEL);
	393	if (!d)
	394	return -ENOMEM;
	395
	396	r = ssu100_getregister(dev, 0, UART_MCR, d);
	397	if (r < 0)
	398	goto mget_out;
	399
	400	r = ssu100_getregister(dev, 0, UART_MSR, d+1);
	401	if (r < 0)
	402	goto mget_out;
	403
	404	r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) \|
	405	(d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) \|
	406	(d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) \|
	407	(d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) \|
	408	(d[1] & UART_MSR_RI ? TIOCM_RI : 0) \|
	409	(d[1] & UART_MSR_DSR ? TIOCM_DSR : 0);
	410
	411	mget_out:
	412	kfree(d);
	413	return r;
	414	}
	415
	416	static int ssu100_tiocmset(struct tty_struct *tty,
	417	unsigned int set, unsigned int clear)
	418	{
	419	struct usb_serial_port *port = tty->driver_data;
	420	struct usb_device *dev = port->serial->dev;
	421
	422	return update_mctrl(dev, set, clear);
	423	}
	424
	425	static void ssu100_dtr_rts(struct usb_serial_port *port, int on)
	426	{
	427	struct usb_device *dev = port->serial->dev;
	428
	429	/* Disable flow control */
	430	if (!on) {
	431	if (ssu100_setregister(dev, 0, UART_MCR, 0) < 0)
	432	dev_err(&port->dev, "error from flowcontrol urb\n");
	433	}
	434	/* drop RTS and DTR */
	435	if (on)
	436	set_mctrl(dev, TIOCM_DTR \| TIOCM_RTS);
	437	else
	438	clear_mctrl(dev, TIOCM_DTR \| TIOCM_RTS);
	439	}
	440
	441	static void ssu100_update_msr(struct usb_serial_port *port, u8 msr)
	442	{
	443	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	444	unsigned long flags;
	445
	446	spin_lock_irqsave(&priv->status_lock, flags);
	447	priv->shadowMSR = msr;
	448	spin_unlock_irqrestore(&priv->status_lock, flags);
	449
	450	if (msr & UART_MSR_ANY_DELTA) {
	451	/* update input line counters */
	452	if (msr & UART_MSR_DCTS)
	453	port->icount.cts++;
	454	if (msr & UART_MSR_DDSR)
	455	port->icount.dsr++;
	456	if (msr & UART_MSR_DDCD)
	457	port->icount.dcd++;
	458	if (msr & UART_MSR_TERI)
	459	port->icount.rng++;
	460	wake_up_interruptible(&port->port.delta_msr_wait);
	461	}
	462	}
	463
	464	static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr,
	465	char *tty_flag)
	466	{
	467	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	468	unsigned long flags;
	469
	470	spin_lock_irqsave(&priv->status_lock, flags);
	471	priv->shadowLSR = lsr;
	472	spin_unlock_irqrestore(&priv->status_lock, flags);
	473
	474	*tty_flag = TTY_NORMAL;
	475	if (lsr & UART_LSR_BRK_ERROR_BITS) {
	476	/* we always want to update icount, but we only want to
	477	* update tty_flag for one case */
	478	if (lsr & UART_LSR_BI) {
	479	port->icount.brk++;
	480	*tty_flag = TTY_BREAK;
	481	usb_serial_handle_break(port);
	482	}
	483	if (lsr & UART_LSR_PE) {
	484	port->icount.parity++;
	485	if (*tty_flag == TTY_NORMAL)
	486	*tty_flag = TTY_PARITY;
	487	}
	488	if (lsr & UART_LSR_FE) {
	489	port->icount.frame++;
	490	if (*tty_flag == TTY_NORMAL)
	491	*tty_flag = TTY_FRAME;
	492	}
	493	if (lsr & UART_LSR_OE) {
	494	port->icount.overrun++;
	495	tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
	496	}
	497	}
	498
	499	}
	500
	501	static void ssu100_process_read_urb(struct urb *urb)
	502	{
	503	struct usb_serial_port *port = urb->context;
	504	char packet = (char )urb->transfer_buffer;
	505	char flag = TTY_NORMAL;
	506	u32 len = urb->actual_length;
	507	int i;
	508	char *ch;
	509
	510	if ((len >= 4) &&
	511	(packet[0] == 0x1b) && (packet[1] == 0x1b) &&
	512	((packet[2] == 0x00) \|\| (packet[2] == 0x01))) {
	513	if (packet[2] == 0x00)
	514	ssu100_update_lsr(port, packet[3], &flag);
	515	if (packet[2] == 0x01)
	516	ssu100_update_msr(port, packet[3]);
	517
	518	len -= 4;
	519	ch = packet + 4;
	520	} else
	521	ch = packet;
	522
	523	if (!len)
	524	return; /* status only */
	525
	526	if (port->port.console && port->sysrq) {
	527	for (i = 0; i < len; i++, ch++) {
	528	if (!usb_serial_handle_sysrq_char(port, *ch))
	529	tty_insert_flip_char(&port->port, *ch, flag);
	530	}
	531	} else
	532	tty_insert_flip_string_fixed_flag(&port->port, ch, flag, len);
	533
	534	tty_flip_buffer_push(&port->port);
	535	}
	536
	537	static struct usb_serial_driver ssu100_device = {
	538	.driver = {
	539	.owner = THIS_MODULE,
	540	.name = "ssu100",
	541	},
	542	.description = DRIVER_DESC,
	543	.id_table = id_table,
	544	.num_ports = 1,
	545	.open = ssu100_open,
	546	.attach = ssu100_attach,
	547	.port_probe = ssu100_port_probe,
	548	.port_remove = ssu100_port_remove,
	549	.dtr_rts = ssu100_dtr_rts,
	550	.process_read_urb = ssu100_process_read_urb,
	551	.tiocmget = ssu100_tiocmget,
	552	.tiocmset = ssu100_tiocmset,
	553	.tiocmiwait = usb_serial_generic_tiocmiwait,
	554	.get_icount = usb_serial_generic_get_icount,
	555	.ioctl = ssu100_ioctl,
	556	.set_termios = ssu100_set_termios,
	557	};
	558
	559	static struct usb_serial_driver * const serial_drivers[] = {
	560	&ssu100_device, NULL
	561	};
	562
	563	module_usb_serial_driver(serial_drivers, id_table);
	564
	565	MODULE_DESCRIPTION(DRIVER_DESC);
	566	MODULE_LICENSE("GPL");