[linux-2.6-block.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/init.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->serial->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;

	dev_dbg(&port->dev, "%s cmd 0x%04x\n", __func__, cmd);

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

	dev_dbg(&port->dev, "%s arg not supported\n", __func__);

	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++;
			if (*tty_flag == TTY_NORMAL)
				*tty_flag = 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 (flag == TTY_OVERRUN)
				tty_insert_flip_char(&port->port, 0,
						TTY_OVERRUN);
		}
		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
52af9545 BP	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/init.h>
	10	#include <linux/slab.h>
	11	#include <linux/tty.h>
	12	#include <linux/tty_driver.h>
	13	#include <linux/tty_flip.h>
	14	#include <linux/module.h>
	15	#include <linux/serial.h>
	16	#include <linux/usb.h>
	17	#include <linux/usb/serial.h>
79f203a2	18	#include <linux/serial_reg.h>
52af9545 BP	19	#include <linux/uaccess.h>
	20
	21	#define QT_OPEN_CLOSE_CHANNEL 0xca
	22	#define QT_SET_GET_DEVICE 0xc2
	23	#define QT_SET_GET_REGISTER 0xc0
	24	#define QT_GET_SET_PREBUF_TRIG_LVL 0xcc
	25	#define QT_SET_ATF 0xcd
	26	#define QT_GET_SET_UART 0xc1
	27	#define QT_TRANSFER_IN 0xc0
	28	#define QT_HW_FLOW_CONTROL_MASK 0xc5
	29	#define QT_SW_FLOW_CONTROL_MASK 0xc6
	30
52af9545 BP	31	#define SERIAL_MSR_MASK 0xf0
52af9545 BP	32
79f203a2	33	#define SERIAL_CRTSCTS ((UART_MCR_RTS << 8) \| UART_MSR_CTS)
52af9545	34
79f203a2	35	#define SERIAL_EVEN_PARITY (UART_LCR_PARITY \| UART_LCR_EPAR)
52af9545 BP	36
	37	#define MAX_BAUD_RATE 460800
	38
	39	#define ATC_DISABLED 0x00
	40	#define DUPMODE_BITS 0xc0
	41	#define RR_BITS 0x03
	42	#define LOOPMODE_BITS 0x41
	43	#define RS232_MODE 0x00
	44	#define RTSCTS_TO_CONNECTOR 0x40
	45	#define CLKS_X4 0x02
	46	#define FULLPWRBIT 0x00000080
	47	#define NEXT_BOARD_POWER_BIT 0x00000004
	48
52af9545 BP	49	#define DRIVER_DESC "Quatech SSU-100 USB to Serial Driver"
	50
	51	#define USB_VENDOR_ID_QUATECH 0x061d /* Quatech VID */
	52	#define QUATECH_SSU100 0xC020 /* SSU100 */
	53
	54	static const struct usb_device_id id_table[] = {
	55	{USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100)},
	56	{} /* Terminating entry */
	57	};
52af9545 BP	58	MODULE_DEVICE_TABLE(usb, id_table);
52af9545 BP	59
52af9545	60	struct ssu100_port_private {
17523058	61	spinlock_t status_lock;
52af9545 BP	62	u8 shadowLSR;
52af9545 BP	63	u8 shadowMSR;
52af9545 BP	64	};
52af9545 BP	65
52af9545 BP	66	static inline int ssu100_control_msg(struct usb_device *dev,
	67	u8 request, u16 data, u16 index)
	68	{
	69	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
	70	request, 0x40, data, index,
	71	NULL, 0, 300);
	72	}
	73
	74	static inline int ssu100_setdevice(struct usb_device dev, u8 data)
	75	{
	76	u16 x = ((u16)(data[1] << 8) \| (u16)(data[0]));
	77
	78	return ssu100_control_msg(dev, QT_SET_GET_DEVICE, x, 0);
	79	}
	80
	81
	82	static inline int ssu100_getdevice(struct usb_device dev, u8 data)
	83	{
	84	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	85	QT_SET_GET_DEVICE, 0xc0, 0, 0,
	86	data, 3, 300);
	87	}
	88
	89	static inline int ssu100_getregister(struct usb_device *dev,
	90	unsigned short uart,
	91	unsigned short reg,
	92	u8 *data)
	93	{
	94	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	95	QT_SET_GET_REGISTER, 0xc0, reg,
	96	uart, data, sizeof(*data), 300);
	97
	98	}
	99
	100
	101	static inline int ssu100_setregister(struct usb_device *dev,
	102	unsigned short uart,
556f1a0e	103	unsigned short reg,
52af9545 BP	104	u16 data)
52af9545 BP	105	{
556f1a0e	106	u16 value = (data << 8) \| reg;
52af9545 BP	107
	108	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
	109	QT_SET_GET_REGISTER, 0x40, value, uart,
	110	NULL, 0, 300);
	111
	112	}
	113
	114	#define set_mctrl(dev, set) update_mctrl((dev), (set), 0)
	115	#define clear_mctrl(dev, clear) update_mctrl((dev), 0, (clear))
	116
	117	/* these do not deal with device that have more than 1 port */
	118	static inline int update_mctrl(struct usb_device *dev, unsigned int set,
	119	unsigned int clear)
	120	{
	121	unsigned urb_value;
	122	int result;
	123
	124	if (((set \| clear) & (TIOCM_DTR \| TIOCM_RTS)) == 0) {
4f0c6412	125	dev_dbg(&dev->dev, "%s - DTR\|RTS not being set\|cleared\n", __func__);
52af9545 BP	126	return 0; /* no change */
	127	}
	128
	129	clear &= ~set; /* 'set' takes precedence over 'clear' */
	130	urb_value = 0;
	131	if (set & TIOCM_DTR)
79f203a2	132	urb_value \|= UART_MCR_DTR;
52af9545	133	if (set & TIOCM_RTS)
79f203a2	134	urb_value \|= UART_MCR_RTS;
52af9545	135
556f1a0e	136	result = ssu100_setregister(dev, 0, UART_MCR, urb_value);
52af9545	137	if (result < 0)
4f0c6412	138	dev_dbg(&dev->dev, "%s Error from MODEM_CTRL urb\n", __func__);
52af9545 BP	139
	140	return result;
	141	}
	142
	143	static int ssu100_initdevice(struct usb_device *dev)
	144	{
	145	u8 *data;
	146	int result = 0;
	147
52af9545 BP	148	data = kzalloc(3, GFP_KERNEL);
	149	if (!data)
	150	return -ENOMEM;
	151
	152	result = ssu100_getdevice(dev, data);
	153	if (result < 0) {
4f0c6412	154	dev_dbg(&dev->dev, "%s - get_device failed %i\n", __func__, result);
52af9545 BP	155	goto out;
	156	}
	157
	158	data[1] &= ~FULLPWRBIT;
	159
	160	result = ssu100_setdevice(dev, data);
	161	if (result < 0) {
4f0c6412	162	dev_dbg(&dev->dev, "%s - setdevice failed %i\n", __func__, result);
52af9545 BP	163	goto out;
	164	}
	165
	166	result = ssu100_control_msg(dev, QT_GET_SET_PREBUF_TRIG_LVL, 128, 0);
	167	if (result < 0) {
4f0c6412	168	dev_dbg(&dev->dev, "%s - set prebuffer level failed %i\n", __func__, result);
52af9545 BP	169	goto out;
	170	}
	171
	172	result = ssu100_control_msg(dev, QT_SET_ATF, ATC_DISABLED, 0);
	173	if (result < 0) {
4f0c6412	174	dev_dbg(&dev->dev, "%s - set ATFprebuffer level failed %i\n", __func__, result);
52af9545 BP	175	goto out;
	176	}
	177
	178	result = ssu100_getdevice(dev, data);
	179	if (result < 0) {
4f0c6412	180	dev_dbg(&dev->dev, "%s - get_device failed %i\n", __func__, result);
52af9545 BP	181	goto out;
	182	}
	183
	184	data[0] &= ~(RR_BITS \| DUPMODE_BITS);
	185	data[0] \|= CLKS_X4;
	186	data[1] &= ~(LOOPMODE_BITS);
	187	data[1] \|= RS232_MODE;
	188
	189	result = ssu100_setdevice(dev, data);
	190	if (result < 0) {
4f0c6412	191	dev_dbg(&dev->dev, "%s - setdevice failed %i\n", __func__, result);
52af9545 BP	192	goto out;
	193	}
	194
	195	out: kfree(data);
	196	return result;
	197
	198	}
	199
	200
	201	static void ssu100_set_termios(struct tty_struct *tty,
	202	struct usb_serial_port *port,
	203	struct ktermios *old_termios)
	204	{
	205	struct usb_device *dev = port->serial->dev;
adc8d746	206	struct ktermios *termios = &tty->termios;
52af9545 BP	207	u16 baud, divisor, remainder;
	208	unsigned int cflag = termios->c_cflag;
	209	u16 urb_value = 0; /* will hold the new flags */
	210	int result;
	211
52af9545 BP	212	if (cflag & PARENB) {
52af9545 BP	213	if (cflag & PARODD)
79f203a2	214	urb_value \|= UART_LCR_PARITY;
52af9545 BP	215	else
	216	urb_value \|= SERIAL_EVEN_PARITY;
	217	}
	218
	219	switch (cflag & CSIZE) {
	220	case CS5:
79f203a2	221	urb_value \|= UART_LCR_WLEN5;
52af9545 BP	222	break;
52af9545 BP	223	case CS6:
79f203a2	224	urb_value \|= UART_LCR_WLEN6;
52af9545 BP	225	break;
52af9545 BP	226	case CS7:
79f203a2	227	urb_value \|= UART_LCR_WLEN7;
52af9545 BP	228	break;
	229	default:
	230	case CS8:
79f203a2	231	urb_value \|= UART_LCR_WLEN8;
52af9545 BP	232	break;
	233	}
	234
	235	baud = tty_get_baud_rate(tty);
	236	if (!baud)
	237	baud = 9600;
	238
4f0c6412	239	dev_dbg(&port->dev, "%s - got baud = %d\n", __func__, baud);
52af9545 BP	240
	241
	242	divisor = MAX_BAUD_RATE / baud;
	243	remainder = MAX_BAUD_RATE % baud;
	244	if (((remainder * 2) >= baud) && (baud != 110))
	245	divisor++;
	246
	247	urb_value = urb_value << 8;
	248
	249	result = ssu100_control_msg(dev, QT_GET_SET_UART, divisor, urb_value);
	250	if (result < 0)
4f0c6412	251	dev_dbg(&port->dev, "%s - set uart failed\n", __func__);
52af9545 BP	252
	253	if (cflag & CRTSCTS)
	254	result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
	255	SERIAL_CRTSCTS, 0);
	256	else
	257	result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
	258	0, 0);
	259	if (result < 0)
4f0c6412	260	dev_dbg(&port->dev, "%s - set HW flow control failed\n", __func__);
52af9545 BP	261
	262	if (I_IXOFF(tty) \|\| I_IXON(tty)) {
	263	u16 x = ((u16)(START_CHAR(tty) << 8) \| (u16)(STOP_CHAR(tty)));
	264
	265	result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
	266	x, 0);
	267	} else
	268	result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
	269	0, 0);
	270
	271	if (result < 0)
4f0c6412	272	dev_dbg(&port->dev, "%s - set SW flow control failed\n", __func__);
52af9545 BP	273
	274	}
	275
	276
	277	static int ssu100_open(struct tty_struct tty, struct usb_serial_port port)
	278	{
	279	struct usb_device *dev = port->serial->dev;
	280	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	281	u8 *data;
	282	int result;
17523058	283	unsigned long flags;
52af9545	284
52af9545 BP	285	data = kzalloc(2, GFP_KERNEL);
	286	if (!data)
	287	return -ENOMEM;
	288
	289	result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	290	QT_OPEN_CLOSE_CHANNEL,
	291	QT_TRANSFER_IN, 0x01,
	292	0, data, 2, 300);
	293	if (result < 0) {
4f0c6412	294	dev_dbg(&port->dev, "%s - open failed %i\n", __func__, result);
52af9545 BP	295	kfree(data);
	296	return result;
	297	}
	298
17523058	299	spin_lock_irqsave(&priv->status_lock, flags);
f81c83db BP	300	priv->shadowLSR = data[0];
f81c83db BP	301	priv->shadowMSR = data[1];
17523058	302	spin_unlock_irqrestore(&priv->status_lock, flags);
52af9545 BP	303
	304	kfree(data);
	305
	306	/* set to 9600 */
	307	result = ssu100_control_msg(dev, QT_GET_SET_UART, 0x30, 0x0300);
	308	if (result < 0)
4f0c6412	309	dev_dbg(&port->dev, "%s - set uart failed\n", __func__);
52af9545 BP	310
52af9545 BP	311	if (tty)
adc8d746	312	ssu100_set_termios(tty, port, &tty->termios);
52af9545 BP	313
	314	return usb_serial_generic_open(tty, port);
	315	}
	316
52af9545 BP	317	static int get_serial_info(struct usb_serial_port *port,
	318	struct serial_struct __user *retinfo)
	319	{
	320	struct serial_struct tmp;
	321
	322	if (!retinfo)
	323	return -EFAULT;
	324
	325	memset(&tmp, 0, sizeof(tmp));
	326	tmp.line = port->serial->minor;
	327	tmp.port = 0;
	328	tmp.irq = 0;
	329	tmp.flags = ASYNC_SKIP_TEST \| ASYNC_AUTO_IRQ;
	330	tmp.xmit_fifo_size = port->bulk_out_size;
	331	tmp.baud_base = 9600;
	332	tmp.close_delay = 5*HZ;
	333	tmp.closing_wait = 30*HZ;
	334
	335	if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
	336	return -EFAULT;
	337	return 0;
	338	}
	339
00a0d0d6	340	static int ssu100_ioctl(struct tty_struct *tty,
52af9545 BP	341	unsigned int cmd, unsigned long arg)
	342	{
	343	struct usb_serial_port *port = tty->driver_data;
52af9545	344
4f0c6412	345	dev_dbg(&port->dev, "%s cmd 0x%04x\n", __func__, cmd);
52af9545 BP	346
	347	switch (cmd) {
	348	case TIOCGSERIAL:
	349	return get_serial_info(port,
	350	(struct serial_struct __user *) arg);
52af9545 BP	351	default:
	352	break;
	353	}
	354
4f0c6412	355	dev_dbg(&port->dev, "%s arg not supported\n", __func__);
52af9545 BP	356
	357	return -ENOIOCTLCMD;
	358	}
	359
52af9545	360	static int ssu100_attach(struct usb_serial *serial)
638b9e15 JH	361	{
	362	return ssu100_initdevice(serial->dev);
	363	}
	364
	365	static int ssu100_port_probe(struct usb_serial_port *port)
52af9545 BP	366	{
52af9545 BP	367	struct ssu100_port_private *priv;
52af9545	368
52af9545	369	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
638b9e15	370	if (!priv)
52af9545	371	return -ENOMEM;
52af9545	372
17523058	373	spin_lock_init(&priv->status_lock);
638b9e15	374
52af9545	375	usb_set_serial_port_data(port, priv);
52af9545	376
638b9e15 JH	377	return 0;
	378	}
	379
	380	static int ssu100_port_remove(struct usb_serial_port *port)
	381	{
	382	struct ssu100_port_private *priv;
	383
	384	priv = usb_get_serial_port_data(port);
	385	kfree(priv);
	386
	387	return 0;
52af9545 BP	388	}
52af9545 BP	389
60b33c13	390	static int ssu100_tiocmget(struct tty_struct *tty)
52af9545 BP	391	{
	392	struct usb_serial_port *port = tty->driver_data;
	393	struct usb_device *dev = port->serial->dev;
	394	u8 *d;
	395	int r;
	396
52af9545 BP	397	d = kzalloc(2, GFP_KERNEL);
	398	if (!d)
	399	return -ENOMEM;
	400
79f203a2	401	r = ssu100_getregister(dev, 0, UART_MCR, d);
52af9545 BP	402	if (r < 0)
	403	goto mget_out;
	404
79f203a2	405	r = ssu100_getregister(dev, 0, UART_MSR, d+1);
52af9545 BP	406	if (r < 0)
	407	goto mget_out;
	408
79f203a2 BP	409	r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) \|
	410	(d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) \|
	411	(d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) \|
	412	(d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) \|
	413	(d[1] & UART_MSR_RI ? TIOCM_RI : 0) \|
	414	(d[1] & UART_MSR_DSR ? TIOCM_DSR : 0);
52af9545 BP	415
	416	mget_out:
	417	kfree(d);
	418	return r;
	419	}
	420
20b9d177	421	static int ssu100_tiocmset(struct tty_struct *tty,
52af9545 BP	422	unsigned int set, unsigned int clear)
	423	{
	424	struct usb_serial_port *port = tty->driver_data;
	425	struct usb_device *dev = port->serial->dev;
	426
52af9545 BP	427	return update_mctrl(dev, set, clear);
	428	}
	429
	430	static void ssu100_dtr_rts(struct usb_serial_port *port, int on)
	431	{
	432	struct usb_device *dev = port->serial->dev;
	433
b2ca6990 JH	434	/* Disable flow control */
	435	if (!on) {
	436	if (ssu100_setregister(dev, 0, UART_MCR, 0) < 0)
52af9545	437	dev_err(&port->dev, "error from flowcontrol urb\n");
52af9545	438	}
b2ca6990 JH	439	/* drop RTS and DTR */
	440	if (on)
	441	set_mctrl(dev, TIOCM_DTR \| TIOCM_RTS);
	442	else
	443	clear_mctrl(dev, TIOCM_DTR \| TIOCM_RTS);
52af9545 BP	444	}
52af9545 BP	445
f81c83db BP	446	static void ssu100_update_msr(struct usb_serial_port *port, u8 msr)
	447	{
	448	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	449	unsigned long flags;
	450
	451	spin_lock_irqsave(&priv->status_lock, flags);
	452	priv->shadowMSR = msr;
	453	spin_unlock_irqrestore(&priv->status_lock, flags);
	454
	455	if (msr & UART_MSR_ANY_DELTA) {
	456	/* update input line counters */
	457	if (msr & UART_MSR_DCTS)
31ecdb6b	458	port->icount.cts++;
f81c83db	459	if (msr & UART_MSR_DDSR)
31ecdb6b	460	port->icount.dsr++;
f81c83db	461	if (msr & UART_MSR_DDCD)
31ecdb6b	462	port->icount.dcd++;
f81c83db	463	if (msr & UART_MSR_TERI)
31ecdb6b	464	port->icount.rng++;
c24c838e	465	wake_up_interruptible(&port->port.delta_msr_wait);
f81c83db BP	466	}
	467	}
	468
6b8f1ca5 BP	469	static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr,
6b8f1ca5 BP	470	char *tty_flag)
f81c83db BP	471	{
	472	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	473	unsigned long flags;
	474
	475	spin_lock_irqsave(&priv->status_lock, flags);
	476	priv->shadowLSR = lsr;
	477	spin_unlock_irqrestore(&priv->status_lock, flags);
	478
6b8f1ca5	479	*tty_flag = TTY_NORMAL;
f81c83db	480	if (lsr & UART_LSR_BRK_ERROR_BITS) {
6b8f1ca5 BP	481	/* we always want to update icount, but we only want to
	482	* update tty_flag for one case */
	483	if (lsr & UART_LSR_BI) {
31ecdb6b	484	port->icount.brk++;
6b8f1ca5 BP	485	*tty_flag = TTY_BREAK;
	486	usb_serial_handle_break(port);
	487	}
	488	if (lsr & UART_LSR_PE) {
31ecdb6b	489	port->icount.parity++;
6b8f1ca5 BP	490	if (*tty_flag == TTY_NORMAL)
	491	*tty_flag = TTY_PARITY;
	492	}
	493	if (lsr & UART_LSR_FE) {
31ecdb6b	494	port->icount.frame++;
6b8f1ca5 BP	495	if (*tty_flag == TTY_NORMAL)
	496	*tty_flag = TTY_FRAME;
	497	}
	498	if (lsr & UART_LSR_OE){
31ecdb6b	499	port->icount.overrun++;
6b8f1ca5 BP	500	if (*tty_flag == TTY_NORMAL)
	501	*tty_flag = TTY_OVERRUN;
	502	}
f81c83db	503	}
6b8f1ca5	504
f81c83db BP	505	}
f81c83db BP	506
2e124b4a	507	static void ssu100_process_read_urb(struct urb *urb)
52af9545	508	{
f7043ecb BP	509	struct usb_serial_port *port = urb->context;
f7043ecb BP	510	char packet = (char )urb->transfer_buffer;
6b8f1ca5	511	char flag = TTY_NORMAL;
f7043ecb BP	512	u32 len = urb->actual_length;
f7043ecb BP	513	int i;
52af9545 BP	514	char *ch;
52af9545 BP	515
9b2cef31 BP	516	if ((len >= 4) &&
9b2cef31 BP	517	(packet[0] == 0x1b) && (packet[1] == 0x1b) &&
52af9545	518	((packet[2] == 0x00) \|\| (packet[2] == 0x01))) {
6b8f1ca5 BP	519	if (packet[2] == 0x00) {
	520	ssu100_update_lsr(port, packet[3], &flag);
	521	if (flag == TTY_OVERRUN)
92a19f9c JS	522	tty_insert_flip_char(&port->port, 0,
92a19f9c JS	523	TTY_OVERRUN);
6b8f1ca5	524	}
f81c83db BP	525	if (packet[2] == 0x01)
f81c83db BP	526	ssu100_update_msr(port, packet[3]);
52af9545 BP	527
	528	len -= 4;
	529	ch = packet + 4;
	530	} else
	531	ch = packet;
	532
	533	if (!len)
2e124b4a	534	return; /* status only */
52af9545 BP	535
	536	if (port->port.console && port->sysrq) {
	537	for (i = 0; i < len; i++, ch++) {
6ee9f4b4	538	if (!usb_serial_handle_sysrq_char(port, *ch))
92a19f9c	539	tty_insert_flip_char(&port->port, *ch, flag);
52af9545 BP	540	}
52af9545 BP	541	} else
2f693357	542	tty_insert_flip_string_fixed_flag(&port->port, ch, flag, len);
52af9545	543
2e124b4a	544	tty_flip_buffer_push(&port->port);
52af9545 BP	545	}
52af9545 BP	546
52af9545 BP	547	static struct usb_serial_driver ssu100_device = {
	548	.driver = {
	549	.owner = THIS_MODULE,
	550	.name = "ssu100",
	551	},
	552	.description = DRIVER_DESC,
	553	.id_table = id_table,
52af9545	554	.num_ports = 1,
52af9545	555	.open = ssu100_open,
52af9545	556	.attach = ssu100_attach,
638b9e15 JH	557	.port_probe = ssu100_port_probe,
638b9e15 JH	558	.port_remove = ssu100_port_remove,
52af9545 BP	559	.dtr_rts = ssu100_dtr_rts,
	560	.process_read_urb = ssu100_process_read_urb,
	561	.tiocmget = ssu100_tiocmget,
	562	.tiocmset = ssu100_tiocmset,
c24c838e	563	.tiocmiwait = usb_serial_generic_tiocmiwait,
31ecdb6b	564	.get_icount = usb_serial_generic_get_icount,
52af9545 BP	565	.ioctl = ssu100_ioctl,
	566	.set_termios = ssu100_set_termios,
	567	};
	568
d860322f AS	569	static struct usb_serial_driver * const serial_drivers[] = {
	570	&ssu100_device, NULL
	571	};
	572
68e24113	573	module_usb_serial_driver(serial_drivers, id_table);
52af9545 BP	574
	575	MODULE_DESCRIPTION(DRIVER_DESC);
	576	MODULE_LICENSE("GPL");