[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

static bool debug;

/* Version Information */
#define DRIVER_VERSION "v0.1"
#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;
	wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
	struct async_icount icount;
};

static void ssu100_release(struct usb_serial *serial)
{
	struct ssu100_port_private *priv = usb_get_serial_port_data(*serial->port);

	kfree(priv);
}

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) {
		dbg("%s - DTR|RTS not being set|cleared", __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)
		dbg("%s Error from MODEM_CTRL urb", __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) {
		dbg("%s - get_device failed %i", __func__, result);
		goto out;
	}

	data[1] &= ~FULLPWRBIT;

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

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

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

	result = ssu100_getdevice(dev, data);
	if (result < 0) {
		dbg("%s - get_device failed %i", __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) {
		dbg("%s - setdevice failed %i", __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;

	dbg("%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)
		dbg("%s - set uart failed", __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)
		dbg("%s - set HW flow control failed", __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)
		dbg("%s - set SW flow control failed", __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) {
		dbg("%s - open failed %i", __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)
		dbg("%s - set uart failed", __func__);

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

	return usb_serial_generic_open(tty, port);
}

static void ssu100_close(struct usb_serial_port *port)
{
	usb_serial_generic_close(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 wait_modem_info(struct usb_serial_port *port, unsigned int arg)
{
	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	struct async_icount prev, cur;
	unsigned long flags;

	spin_lock_irqsave(&priv->status_lock, flags);
	prev = priv->icount;
	spin_unlock_irqrestore(&priv->status_lock, flags);

	while (1) {
		wait_event_interruptible(priv->delta_msr_wait,
					 ((priv->icount.rng != prev.rng) ||
					  (priv->icount.dsr != prev.dsr) ||
					  (priv->icount.dcd != prev.dcd) ||
					  (priv->icount.cts != prev.cts)));

		if (signal_pending(current))
			return -ERESTARTSYS;

		spin_lock_irqsave(&priv->status_lock, flags);
		cur = priv->icount;
		spin_unlock_irqrestore(&priv->status_lock, flags);

		if ((prev.rng == cur.rng) &&
		    (prev.dsr == cur.dsr) &&
		    (prev.dcd == cur.dcd) &&
		    (prev.cts == cur.cts))
			return -EIO;

		if ((arg & TIOCM_RNG && (prev.rng != cur.rng)) ||
		    (arg & TIOCM_DSR && (prev.dsr != cur.dsr)) ||
		    (arg & TIOCM_CD  && (prev.dcd != cur.dcd)) ||
		    (arg & TIOCM_CTS && (prev.cts != cur.cts)))
			return 0;
	}
	return 0;
}

static int ssu100_get_icount(struct tty_struct *tty,
			struct serial_icounter_struct *icount)
{
	struct usb_serial_port *port = tty->driver_data;
	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	struct async_icount cnow = priv->icount;

	icount->cts = cnow.cts;
	icount->dsr = cnow.dsr;
	icount->rng = cnow.rng;
	icount->dcd = cnow.dcd;
	icount->rx = cnow.rx;
	icount->tx = cnow.tx;
	icount->frame = cnow.frame;
	icount->overrun = cnow.overrun;
	icount->parity = cnow.parity;
	icount->brk = cnow.brk;
	icount->buf_overrun = cnow.buf_overrun;

	return 0;
}


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

	dbg("%s cmd 0x%04x", __func__, cmd);

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

	case TIOCMIWAIT:
		return wait_modem_info(port, arg);

	default:
		break;
	}

	dbg("%s arg not supported", __func__);

	return -ENOIOCTLCMD;
}

static int ssu100_attach(struct usb_serial *serial)
{
	struct ssu100_port_private *priv;
	struct usb_serial_port *port = *serial->port;

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		dev_err(&port->dev, "%s- kmalloc(%Zd) failed.\n", __func__,
			sizeof(*priv));
		return -ENOMEM;
	}

	spin_lock_init(&priv->status_lock);
	init_waitqueue_head(&priv->delta_msr_wait);
	usb_set_serial_port_data(port, priv);

	return ssu100_initdevice(serial->dev);
}

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;

	mutex_lock(&port->serial->disc_mutex);
	if (!port->serial->disconnected) {
		/* Disable flow control */
		if (!on &&
		    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);
	}
	mutex_unlock(&port->serial->disc_mutex);
}

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)
			priv->icount.cts++;
		if (msr & UART_MSR_DDSR)
			priv->icount.dsr++;
		if (msr & UART_MSR_DDCD)
			priv->icount.dcd++;
		if (msr & UART_MSR_TERI)
			priv->icount.rng++;
		wake_up_interruptible(&priv->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) {
			priv->icount.brk++;
			*tty_flag = TTY_BREAK;
			usb_serial_handle_break(port);
		}
		if (lsr & UART_LSR_PE) {
			priv->icount.parity++;
			if (*tty_flag == TTY_NORMAL)
				*tty_flag = TTY_PARITY;
		}
		if (lsr & UART_LSR_FE) {
			priv->icount.frame++;
			if (*tty_flag == TTY_NORMAL)
				*tty_flag = TTY_FRAME;
		}
		if (lsr & UART_LSR_OE){
			priv->icount.overrun++;
			if (*tty_flag == TTY_NORMAL)
				*tty_flag = TTY_OVERRUN;
		}
	}

}

static int ssu100_process_packet(struct urb *urb,
				 struct tty_struct *tty)
{
	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(tty, 0, TTY_OVERRUN);
		}
		if (packet[2] == 0x01)
			ssu100_update_msr(port, packet[3]);

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

	if (!len)
		return 0;	/* 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(tty, *ch, flag);
		}
	} else
		tty_insert_flip_string_fixed_flag(tty, ch, flag, len);

	return len;
}

static void ssu100_process_read_urb(struct urb *urb)
{
	struct usb_serial_port *port = urb->context;
	struct tty_struct *tty;
	int count;

	tty = tty_port_tty_get(&port->port);
	if (!tty)
		return;

	count = ssu100_process_packet(urb, tty);

	if (count)
		tty_flip_buffer_push(tty);
	tty_kref_put(tty);
}

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,
	.close		     = ssu100_close,
	.attach              = ssu100_attach,
	.release             = ssu100_release,
	.dtr_rts             = ssu100_dtr_rts,
	.process_read_urb    = ssu100_process_read_urb,
	.tiocmget            = ssu100_tiocmget,
	.tiocmset            = ssu100_tiocmset,
	.get_icount	     = ssu100_get_icount,
	.ioctl               = ssu100_ioctl,
	.set_termios         = ssu100_set_termios,
	.disconnect          = usb_serial_generic_disconnect,
};

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");

module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");
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
90ab5ee9	49	static bool debug;
52af9545 BP	50
	51	/* Version Information */
	52	#define DRIVER_VERSION "v0.1"
	53	#define DRIVER_DESC "Quatech SSU-100 USB to Serial Driver"
	54
	55	#define USB_VENDOR_ID_QUATECH 0x061d /* Quatech VID */
	56	#define QUATECH_SSU100 0xC020 /* SSU100 */
	57
	58	static const struct usb_device_id id_table[] = {
	59	{USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100)},
	60	{} /* Terminating entry */
	61	};
52af9545 BP	62	MODULE_DEVICE_TABLE(usb, id_table);
52af9545 BP	63
52af9545	64	struct ssu100_port_private {
17523058	65	spinlock_t status_lock;
52af9545 BP	66	u8 shadowLSR;
	67	u8 shadowMSR;
	68	wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
f81c83db	69	struct async_icount icount;
52af9545 BP	70	};
	71
	72	static void ssu100_release(struct usb_serial *serial)
	73	{
	74	struct ssu100_port_private priv = usb_get_serial_port_data(serial->port);
	75
52af9545 BP	76	kfree(priv);
	77	}
	78
	79	static inline int ssu100_control_msg(struct usb_device *dev,
	80	u8 request, u16 data, u16 index)
	81	{
	82	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
	83	request, 0x40, data, index,
	84	NULL, 0, 300);
	85	}
	86
	87	static inline int ssu100_setdevice(struct usb_device dev, u8 data)
	88	{
	89	u16 x = ((u16)(data[1] << 8) \| (u16)(data[0]));
	90
	91	return ssu100_control_msg(dev, QT_SET_GET_DEVICE, x, 0);
	92	}
	93
	94
	95	static inline int ssu100_getdevice(struct usb_device dev, u8 data)
	96	{
	97	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	98	QT_SET_GET_DEVICE, 0xc0, 0, 0,
	99	data, 3, 300);
	100	}
	101
	102	static inline int ssu100_getregister(struct usb_device *dev,
	103	unsigned short uart,
	104	unsigned short reg,
	105	u8 *data)
	106	{
	107	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	108	QT_SET_GET_REGISTER, 0xc0, reg,
	109	uart, data, sizeof(*data), 300);
	110
	111	}
	112
	113
	114	static inline int ssu100_setregister(struct usb_device *dev,
	115	unsigned short uart,
556f1a0e	116	unsigned short reg,
52af9545 BP	117	u16 data)
52af9545 BP	118	{
556f1a0e	119	u16 value = (data << 8) \| reg;
52af9545 BP	120
	121	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
	122	QT_SET_GET_REGISTER, 0x40, value, uart,
	123	NULL, 0, 300);
	124
	125	}
	126
	127	#define set_mctrl(dev, set) update_mctrl((dev), (set), 0)
	128	#define clear_mctrl(dev, clear) update_mctrl((dev), 0, (clear))
	129
	130	/* these do not deal with device that have more than 1 port */
	131	static inline int update_mctrl(struct usb_device *dev, unsigned int set,
	132	unsigned int clear)
	133	{
	134	unsigned urb_value;
	135	int result;
	136
	137	if (((set \| clear) & (TIOCM_DTR \| TIOCM_RTS)) == 0) {
	138	dbg("%s - DTR\|RTS not being set\|cleared", __func__);
	139	return 0; /* no change */
	140	}
	141
	142	clear &= ~set; /* 'set' takes precedence over 'clear' */
	143	urb_value = 0;
	144	if (set & TIOCM_DTR)
79f203a2	145	urb_value \|= UART_MCR_DTR;
52af9545	146	if (set & TIOCM_RTS)
79f203a2	147	urb_value \|= UART_MCR_RTS;
52af9545	148
556f1a0e	149	result = ssu100_setregister(dev, 0, UART_MCR, urb_value);
52af9545 BP	150	if (result < 0)
	151	dbg("%s Error from MODEM_CTRL urb", __func__);
	152
	153	return result;
	154	}
	155
	156	static int ssu100_initdevice(struct usb_device *dev)
	157	{
	158	u8 *data;
	159	int result = 0;
	160
52af9545 BP	161	data = kzalloc(3, GFP_KERNEL);
	162	if (!data)
	163	return -ENOMEM;
	164
	165	result = ssu100_getdevice(dev, data);
	166	if (result < 0) {
	167	dbg("%s - get_device failed %i", __func__, result);
	168	goto out;
	169	}
	170
	171	data[1] &= ~FULLPWRBIT;
	172
	173	result = ssu100_setdevice(dev, data);
	174	if (result < 0) {
	175	dbg("%s - setdevice failed %i", __func__, result);
	176	goto out;
	177	}
	178
	179	result = ssu100_control_msg(dev, QT_GET_SET_PREBUF_TRIG_LVL, 128, 0);
	180	if (result < 0) {
	181	dbg("%s - set prebuffer level failed %i", __func__, result);
	182	goto out;
	183	}
	184
	185	result = ssu100_control_msg(dev, QT_SET_ATF, ATC_DISABLED, 0);
	186	if (result < 0) {
	187	dbg("%s - set ATFprebuffer level failed %i", __func__, result);
	188	goto out;
	189	}
	190
	191	result = ssu100_getdevice(dev, data);
	192	if (result < 0) {
	193	dbg("%s - get_device failed %i", __func__, result);
	194	goto out;
	195	}
	196
	197	data[0] &= ~(RR_BITS \| DUPMODE_BITS);
	198	data[0] \|= CLKS_X4;
	199	data[1] &= ~(LOOPMODE_BITS);
	200	data[1] \|= RS232_MODE;
	201
	202	result = ssu100_setdevice(dev, data);
	203	if (result < 0) {
	204	dbg("%s - setdevice failed %i", __func__, result);
	205	goto out;
	206	}
	207
	208	out: kfree(data);
	209	return result;
	210
	211	}
	212
	213
	214	static void ssu100_set_termios(struct tty_struct *tty,
	215	struct usb_serial_port *port,
	216	struct ktermios *old_termios)
	217	{
	218	struct usb_device *dev = port->serial->dev;
	219	struct ktermios *termios = tty->termios;
	220	u16 baud, divisor, remainder;
	221	unsigned int cflag = termios->c_cflag;
	222	u16 urb_value = 0; /* will hold the new flags */
	223	int result;
	224
52af9545 BP	225	if (cflag & PARENB) {
52af9545 BP	226	if (cflag & PARODD)
79f203a2	227	urb_value \|= UART_LCR_PARITY;
52af9545 BP	228	else
	229	urb_value \|= SERIAL_EVEN_PARITY;
	230	}
	231
	232	switch (cflag & CSIZE) {
	233	case CS5:
79f203a2	234	urb_value \|= UART_LCR_WLEN5;
52af9545 BP	235	break;
52af9545 BP	236	case CS6:
79f203a2	237	urb_value \|= UART_LCR_WLEN6;
52af9545 BP	238	break;
52af9545 BP	239	case CS7:
79f203a2	240	urb_value \|= UART_LCR_WLEN7;
52af9545 BP	241	break;
	242	default:
	243	case CS8:
79f203a2	244	urb_value \|= UART_LCR_WLEN8;
52af9545 BP	245	break;
	246	}
	247
	248	baud = tty_get_baud_rate(tty);
	249	if (!baud)
	250	baud = 9600;
	251
	252	dbg("%s - got baud = %d\n", __func__, baud);
	253
	254
	255	divisor = MAX_BAUD_RATE / baud;
	256	remainder = MAX_BAUD_RATE % baud;
	257	if (((remainder * 2) >= baud) && (baud != 110))
	258	divisor++;
	259
	260	urb_value = urb_value << 8;
	261
	262	result = ssu100_control_msg(dev, QT_GET_SET_UART, divisor, urb_value);
	263	if (result < 0)
	264	dbg("%s - set uart failed", __func__);
	265
	266	if (cflag & CRTSCTS)
	267	result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
	268	SERIAL_CRTSCTS, 0);
	269	else
	270	result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
	271	0, 0);
	272	if (result < 0)
	273	dbg("%s - set HW flow control failed", __func__);
	274
	275	if (I_IXOFF(tty) \|\| I_IXON(tty)) {
	276	u16 x = ((u16)(START_CHAR(tty) << 8) \| (u16)(STOP_CHAR(tty)));
	277
	278	result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
	279	x, 0);
	280	} else
	281	result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
	282	0, 0);
	283
	284	if (result < 0)
	285	dbg("%s - set SW flow control failed", __func__);
	286
	287	}
	288
	289
	290	static int ssu100_open(struct tty_struct tty, struct usb_serial_port port)
	291	{
	292	struct usb_device *dev = port->serial->dev;
	293	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	294	u8 *data;
	295	int result;
17523058	296	unsigned long flags;
52af9545	297
52af9545 BP	298	data = kzalloc(2, GFP_KERNEL);
	299	if (!data)
	300	return -ENOMEM;
	301
	302	result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	303	QT_OPEN_CLOSE_CHANNEL,
	304	QT_TRANSFER_IN, 0x01,
	305	0, data, 2, 300);
	306	if (result < 0) {
	307	dbg("%s - open failed %i", __func__, result);
	308	kfree(data);
	309	return result;
	310	}
	311
17523058	312	spin_lock_irqsave(&priv->status_lock, flags);
f81c83db BP	313	priv->shadowLSR = data[0];
f81c83db BP	314	priv->shadowMSR = data[1];
17523058	315	spin_unlock_irqrestore(&priv->status_lock, flags);
52af9545 BP	316
	317	kfree(data);
	318
	319	/* set to 9600 */
	320	result = ssu100_control_msg(dev, QT_GET_SET_UART, 0x30, 0x0300);
	321	if (result < 0)
	322	dbg("%s - set uart failed", __func__);
	323
	324	if (tty)
	325	ssu100_set_termios(tty, port, tty->termios);
	326
	327	return usb_serial_generic_open(tty, port);
	328	}
	329
	330	static void ssu100_close(struct usb_serial_port *port)
	331	{
52af9545 BP	332	usb_serial_generic_close(port);
	333	}
	334
	335	static int get_serial_info(struct usb_serial_port *port,
	336	struct serial_struct __user *retinfo)
	337	{
	338	struct serial_struct tmp;
	339
	340	if (!retinfo)
	341	return -EFAULT;
	342
	343	memset(&tmp, 0, sizeof(tmp));
	344	tmp.line = port->serial->minor;
	345	tmp.port = 0;
	346	tmp.irq = 0;
	347	tmp.flags = ASYNC_SKIP_TEST \| ASYNC_AUTO_IRQ;
	348	tmp.xmit_fifo_size = port->bulk_out_size;
	349	tmp.baud_base = 9600;
	350	tmp.close_delay = 5*HZ;
	351	tmp.closing_wait = 30*HZ;
	352
	353	if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
	354	return -EFAULT;
	355	return 0;
	356	}
	357
f81c83db BP	358	static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
	359	{
	360	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	361	struct async_icount prev, cur;
	362	unsigned long flags;
	363
	364	spin_lock_irqsave(&priv->status_lock, flags);
	365	prev = priv->icount;
	366	spin_unlock_irqrestore(&priv->status_lock, flags);
	367
	368	while (1) {
	369	wait_event_interruptible(priv->delta_msr_wait,
	370	((priv->icount.rng != prev.rng) \|\|
	371	(priv->icount.dsr != prev.dsr) \|\|
	372	(priv->icount.dcd != prev.dcd) \|\|
	373	(priv->icount.cts != prev.cts)));
	374
	375	if (signal_pending(current))
	376	return -ERESTARTSYS;
	377
	378	spin_lock_irqsave(&priv->status_lock, flags);
	379	cur = priv->icount;
	380	spin_unlock_irqrestore(&priv->status_lock, flags);
	381
	382	if ((prev.rng == cur.rng) &&
	383	(prev.dsr == cur.dsr) &&
	384	(prev.dcd == cur.dcd) &&
	385	(prev.cts == cur.cts))
	386	return -EIO;
	387
	388	if ((arg & TIOCM_RNG && (prev.rng != cur.rng)) \|\|
	389	(arg & TIOCM_DSR && (prev.dsr != cur.dsr)) \|\|
	390	(arg & TIOCM_CD && (prev.dcd != cur.dcd)) \|\|
	391	(arg & TIOCM_CTS && (prev.cts != cur.cts)))
	392	return 0;
	393	}
	394	return 0;
	395	}
	396
0bca1b91 AC	397	static int ssu100_get_icount(struct tty_struct *tty,
	398	struct serial_icounter_struct *icount)
	399	{
	400	struct usb_serial_port *port = tty->driver_data;
	401	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	402	struct async_icount cnow = priv->icount;
	403
	404	icount->cts = cnow.cts;
	405	icount->dsr = cnow.dsr;
	406	icount->rng = cnow.rng;
	407	icount->dcd = cnow.dcd;
	408	icount->rx = cnow.rx;
	409	icount->tx = cnow.tx;
	410	icount->frame = cnow.frame;
	411	icount->overrun = cnow.overrun;
	412	icount->parity = cnow.parity;
	413	icount->brk = cnow.brk;
	414	icount->buf_overrun = cnow.buf_overrun;
	415
	416	return 0;
	417	}
	418
	419
	420
00a0d0d6	421	static int ssu100_ioctl(struct tty_struct *tty,
52af9545 BP	422	unsigned int cmd, unsigned long arg)
	423	{
	424	struct usb_serial_port *port = tty->driver_data;
52af9545 BP	425
	426	dbg("%s cmd 0x%04x", __func__, cmd);
	427
	428	switch (cmd) {
	429	case TIOCGSERIAL:
	430	return get_serial_info(port,
	431	(struct serial_struct __user *) arg);
	432
	433	case TIOCMIWAIT:
f81c83db BP	434	return wait_modem_info(port, arg);
f81c83db BP	435
52af9545 BP	436	default:
	437	break;
	438	}
	439
	440	dbg("%s arg not supported", __func__);
	441
	442	return -ENOIOCTLCMD;
	443	}
	444
52af9545 BP	445	static int ssu100_attach(struct usb_serial *serial)
	446	{
	447	struct ssu100_port_private *priv;
	448	struct usb_serial_port port = serial->port;
	449
52af9545 BP	450	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	451	if (!priv) {
	452	dev_err(&port->dev, "%s- kmalloc(%Zd) failed.\n", __func__,
	453	sizeof(*priv));
	454	return -ENOMEM;
	455	}
	456
17523058	457	spin_lock_init(&priv->status_lock);
52af9545 BP	458	init_waitqueue_head(&priv->delta_msr_wait);
52af9545 BP	459	usb_set_serial_port_data(port, priv);
52af9545 BP	460
	461	return ssu100_initdevice(serial->dev);
	462	}
	463
60b33c13	464	static int ssu100_tiocmget(struct tty_struct *tty)
52af9545 BP	465	{
	466	struct usb_serial_port *port = tty->driver_data;
	467	struct usb_device *dev = port->serial->dev;
	468	u8 *d;
	469	int r;
	470
52af9545 BP	471	d = kzalloc(2, GFP_KERNEL);
	472	if (!d)
	473	return -ENOMEM;
	474
79f203a2	475	r = ssu100_getregister(dev, 0, UART_MCR, d);
52af9545 BP	476	if (r < 0)
	477	goto mget_out;
	478
79f203a2	479	r = ssu100_getregister(dev, 0, UART_MSR, d+1);
52af9545 BP	480	if (r < 0)
	481	goto mget_out;
	482
79f203a2 BP	483	r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) \|
	484	(d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) \|
	485	(d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) \|
	486	(d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) \|
	487	(d[1] & UART_MSR_RI ? TIOCM_RI : 0) \|
	488	(d[1] & UART_MSR_DSR ? TIOCM_DSR : 0);
52af9545 BP	489
	490	mget_out:
	491	kfree(d);
	492	return r;
	493	}
	494
20b9d177	495	static int ssu100_tiocmset(struct tty_struct *tty,
52af9545 BP	496	unsigned int set, unsigned int clear)
	497	{
	498	struct usb_serial_port *port = tty->driver_data;
	499	struct usb_device *dev = port->serial->dev;
	500
52af9545 BP	501	return update_mctrl(dev, set, clear);
	502	}
	503
	504	static void ssu100_dtr_rts(struct usb_serial_port *port, int on)
	505	{
	506	struct usb_device *dev = port->serial->dev;
	507
52af9545 BP	508	mutex_lock(&port->serial->disc_mutex);
	509	if (!port->serial->disconnected) {
	510	/* Disable flow control */
	511	if (!on &&
556f1a0e	512	ssu100_setregister(dev, 0, UART_MCR, 0) < 0)
52af9545 BP	513	dev_err(&port->dev, "error from flowcontrol urb\n");
	514	/* drop RTS and DTR */
	515	if (on)
	516	set_mctrl(dev, TIOCM_DTR \| TIOCM_RTS);
	517	else
	518	clear_mctrl(dev, TIOCM_DTR \| TIOCM_RTS);
	519	}
	520	mutex_unlock(&port->serial->disc_mutex);
	521	}
	522
f81c83db BP	523	static void ssu100_update_msr(struct usb_serial_port *port, u8 msr)
	524	{
	525	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	526	unsigned long flags;
	527
	528	spin_lock_irqsave(&priv->status_lock, flags);
	529	priv->shadowMSR = msr;
	530	spin_unlock_irqrestore(&priv->status_lock, flags);
	531
	532	if (msr & UART_MSR_ANY_DELTA) {
	533	/* update input line counters */
	534	if (msr & UART_MSR_DCTS)
	535	priv->icount.cts++;
	536	if (msr & UART_MSR_DDSR)
	537	priv->icount.dsr++;
	538	if (msr & UART_MSR_DDCD)
	539	priv->icount.dcd++;
	540	if (msr & UART_MSR_TERI)
	541	priv->icount.rng++;
	542	wake_up_interruptible(&priv->delta_msr_wait);
	543	}
	544	}
	545
6b8f1ca5 BP	546	static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr,
6b8f1ca5 BP	547	char *tty_flag)
f81c83db BP	548	{
	549	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	550	unsigned long flags;
	551
	552	spin_lock_irqsave(&priv->status_lock, flags);
	553	priv->shadowLSR = lsr;
	554	spin_unlock_irqrestore(&priv->status_lock, flags);
	555
6b8f1ca5	556	*tty_flag = TTY_NORMAL;
f81c83db	557	if (lsr & UART_LSR_BRK_ERROR_BITS) {
6b8f1ca5 BP	558	/* we always want to update icount, but we only want to
	559	* update tty_flag for one case */
	560	if (lsr & UART_LSR_BI) {
f81c83db	561	priv->icount.brk++;
6b8f1ca5 BP	562	*tty_flag = TTY_BREAK;
	563	usb_serial_handle_break(port);
	564	}
	565	if (lsr & UART_LSR_PE) {
f81c83db	566	priv->icount.parity++;
6b8f1ca5 BP	567	if (*tty_flag == TTY_NORMAL)
	568	*tty_flag = TTY_PARITY;
	569	}
	570	if (lsr & UART_LSR_FE) {
	571	priv->icount.frame++;
	572	if (*tty_flag == TTY_NORMAL)
	573	*tty_flag = TTY_FRAME;
	574	}
	575	if (lsr & UART_LSR_OE){
f81c83db	576	priv->icount.overrun++;
6b8f1ca5 BP	577	if (*tty_flag == TTY_NORMAL)
	578	*tty_flag = TTY_OVERRUN;
	579	}
f81c83db	580	}
6b8f1ca5	581
f81c83db BP	582	}
f81c83db BP	583
f7043ecb BP	584	static int ssu100_process_packet(struct urb *urb,
f7043ecb BP	585	struct tty_struct *tty)
52af9545	586	{
f7043ecb BP	587	struct usb_serial_port *port = urb->context;
f7043ecb BP	588	char packet = (char )urb->transfer_buffer;
6b8f1ca5	589	char flag = TTY_NORMAL;
f7043ecb BP	590	u32 len = urb->actual_length;
f7043ecb BP	591	int i;
52af9545 BP	592	char *ch;
52af9545 BP	593
9b2cef31 BP	594	if ((len >= 4) &&
9b2cef31 BP	595	(packet[0] == 0x1b) && (packet[1] == 0x1b) &&
52af9545	596	((packet[2] == 0x00) \|\| (packet[2] == 0x01))) {
6b8f1ca5 BP	597	if (packet[2] == 0x00) {
	598	ssu100_update_lsr(port, packet[3], &flag);
	599	if (flag == TTY_OVERRUN)
	600	tty_insert_flip_char(tty, 0, TTY_OVERRUN);
	601	}
f81c83db BP	602	if (packet[2] == 0x01)
f81c83db BP	603	ssu100_update_msr(port, packet[3]);
52af9545 BP	604
	605	len -= 4;
	606	ch = packet + 4;
	607	} else
	608	ch = packet;
	609
	610	if (!len)
	611	return 0; /* status only */
	612
	613	if (port->port.console && port->sysrq) {
	614	for (i = 0; i < len; i++, ch++) {
6ee9f4b4	615	if (!usb_serial_handle_sysrq_char(port, *ch))
52af9545 BP	616	tty_insert_flip_char(tty, *ch, flag);
	617	}
	618	} else
	619	tty_insert_flip_string_fixed_flag(tty, ch, flag, len);
	620
	621	return len;
	622	}
	623
	624	static void ssu100_process_read_urb(struct urb *urb)
	625	{
	626	struct usb_serial_port *port = urb->context;
52af9545	627	struct tty_struct *tty;
f7043ecb	628	int count;
52af9545	629
52af9545 BP	630	tty = tty_port_tty_get(&port->port);
	631	if (!tty)
	632	return;
	633
f7043ecb	634	count = ssu100_process_packet(urb, tty);
52af9545 BP	635
	636	if (count)
	637	tty_flip_buffer_push(tty);
	638	tty_kref_put(tty);
	639	}
	640
52af9545 BP	641	static struct usb_serial_driver ssu100_device = {
	642	.driver = {
	643	.owner = THIS_MODULE,
	644	.name = "ssu100",
	645	},
	646	.description = DRIVER_DESC,
	647	.id_table = id_table,
52af9545	648	.num_ports = 1,
52af9545 BP	649	.open = ssu100_open,
	650	.close = ssu100_close,
	651	.attach = ssu100_attach,
	652	.release = ssu100_release,
	653	.dtr_rts = ssu100_dtr_rts,
	654	.process_read_urb = ssu100_process_read_urb,
	655	.tiocmget = ssu100_tiocmget,
	656	.tiocmset = ssu100_tiocmset,
0bca1b91	657	.get_icount = ssu100_get_icount,
52af9545 BP	658	.ioctl = ssu100_ioctl,
52af9545 BP	659	.set_termios = ssu100_set_termios,
85dee135	660	.disconnect = usb_serial_generic_disconnect,
52af9545 BP	661	};
52af9545 BP	662
d860322f AS	663	static struct usb_serial_driver * const serial_drivers[] = {
	664	&ssu100_device, NULL
	665	};
	666
68e24113	667	module_usb_serial_driver(serial_drivers, id_table);
52af9545 BP	668
	669	MODULE_DESCRIPTION(DRIVER_DESC);
	670	MODULE_LICENSE("GPL");
	671
	672	module_param(debug, bool, S_IRUGO \| S_IWUSR);
	673	MODULE_PARM_DESC(debug, "Debug enabled or not");