[linux-2.6-block.git] / drivers / usb / serial / ssu100.c

// SPDX-License-Identifier: GPL-2.0
/*
 * 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)
{
	int ret;

	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
			      QT_SET_GET_DEVICE, 0xc0, 0, 0,
			      data, 3, 300);
	if (ret < 3) {
		if (ret >= 0)
			ret = -EIO;
	}

	return ret;
}

static inline int ssu100_getregister(struct usb_device *dev,
				     unsigned short uart,
				     unsigned short reg,
				     u8 *data)
{
	int ret;

	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
			      QT_SET_GET_REGISTER, 0xc0, reg,
			      uart, data, sizeof(*data), 300);
	if (ret < (int)sizeof(*data)) {
		if (ret >= 0)
			ret = -EIO;
	}

	return ret;
}


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 < 2) {
		dev_dbg(&port->dev, "%s - open failed %i\n", __func__, result);
		if (result >= 0)
			result = -EIO;
		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;

	memset(&tmp, 0, sizeof(tmp));
	tmp.line		= port->minor;
	tmp.port		= 0;
	tmp.irq			= 0;
	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 v2");
Commit	Line	Data
5fd54ace	1	// SPDX-License-Identifier: GPL-2.0
52af9545 BP	2	/*
	3	* usb-serial driver for Quatech SSU-100
	4	*
	5	* based on ftdi_sio.c and the original serqt_usb.c from Quatech
	6	*
	7	*/
	8
	9	#include <linux/errno.h>
52af9545 BP	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	{
1eac5c24 JH	84	int ret;
	85
	86	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	87	QT_SET_GET_DEVICE, 0xc0, 0, 0,
	88	data, 3, 300);
	89	if (ret < 3) {
	90	if (ret >= 0)
	91	ret = -EIO;
	92	}
	93
	94	return ret;
52af9545 BP	95	}
	96
	97	static inline int ssu100_getregister(struct usb_device *dev,
	98	unsigned short uart,
	99	unsigned short reg,
	100	u8 *data)
	101	{
1eac5c24 JH	102	int ret;
	103
	104	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	105	QT_SET_GET_REGISTER, 0xc0, reg,
	106	uart, data, sizeof(*data), 300);
3391ca1d	107	if (ret < (int)sizeof(*data)) {
1eac5c24 JH	108	if (ret >= 0)
	109	ret = -EIO;
	110	}
52af9545	111
1eac5c24	112	return ret;
52af9545 BP	113	}
	114
	115
	116	static inline int ssu100_setregister(struct usb_device *dev,
	117	unsigned short uart,
556f1a0e	118	unsigned short reg,
52af9545 BP	119	u16 data)
52af9545 BP	120	{
556f1a0e	121	u16 value = (data << 8) \| reg;
52af9545 BP	122
	123	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
	124	QT_SET_GET_REGISTER, 0x40, value, uart,
	125	NULL, 0, 300);
	126
	127	}
	128
	129	#define set_mctrl(dev, set) update_mctrl((dev), (set), 0)
	130	#define clear_mctrl(dev, clear) update_mctrl((dev), 0, (clear))
	131
	132	/* these do not deal with device that have more than 1 port */
	133	static inline int update_mctrl(struct usb_device *dev, unsigned int set,
	134	unsigned int clear)
	135	{
	136	unsigned urb_value;
	137	int result;
	138
	139	if (((set \| clear) & (TIOCM_DTR \| TIOCM_RTS)) == 0) {
4f0c6412	140	dev_dbg(&dev->dev, "%s - DTR\|RTS not being set\|cleared\n", __func__);
52af9545 BP	141	return 0; /* no change */
	142	}
	143
	144	clear &= ~set; /* 'set' takes precedence over 'clear' */
	145	urb_value = 0;
	146	if (set & TIOCM_DTR)
79f203a2	147	urb_value \|= UART_MCR_DTR;
52af9545	148	if (set & TIOCM_RTS)
79f203a2	149	urb_value \|= UART_MCR_RTS;
52af9545	150
556f1a0e	151	result = ssu100_setregister(dev, 0, UART_MCR, urb_value);
52af9545	152	if (result < 0)
4f0c6412	153	dev_dbg(&dev->dev, "%s Error from MODEM_CTRL urb\n", __func__);
52af9545 BP	154
	155	return result;
	156	}
	157
	158	static int ssu100_initdevice(struct usb_device *dev)
	159	{
	160	u8 *data;
	161	int result = 0;
	162
52af9545 BP	163	data = kzalloc(3, GFP_KERNEL);
	164	if (!data)
	165	return -ENOMEM;
	166
	167	result = ssu100_getdevice(dev, data);
	168	if (result < 0) {
4f0c6412	169	dev_dbg(&dev->dev, "%s - get_device failed %i\n", __func__, result);
52af9545 BP	170	goto out;
	171	}
	172
	173	data[1] &= ~FULLPWRBIT;
	174
	175	result = ssu100_setdevice(dev, data);
	176	if (result < 0) {
4f0c6412	177	dev_dbg(&dev->dev, "%s - setdevice failed %i\n", __func__, result);
52af9545 BP	178	goto out;
	179	}
	180
	181	result = ssu100_control_msg(dev, QT_GET_SET_PREBUF_TRIG_LVL, 128, 0);
	182	if (result < 0) {
4f0c6412	183	dev_dbg(&dev->dev, "%s - set prebuffer level failed %i\n", __func__, result);
52af9545 BP	184	goto out;
	185	}
	186
	187	result = ssu100_control_msg(dev, QT_SET_ATF, ATC_DISABLED, 0);
	188	if (result < 0) {
4f0c6412	189	dev_dbg(&dev->dev, "%s - set ATFprebuffer level failed %i\n", __func__, result);
52af9545 BP	190	goto out;
	191	}
	192
	193	result = ssu100_getdevice(dev, data);
	194	if (result < 0) {
4f0c6412	195	dev_dbg(&dev->dev, "%s - get_device failed %i\n", __func__, result);
52af9545 BP	196	goto out;
	197	}
	198
	199	data[0] &= ~(RR_BITS \| DUPMODE_BITS);
	200	data[0] \|= CLKS_X4;
	201	data[1] &= ~(LOOPMODE_BITS);
	202	data[1] \|= RS232_MODE;
	203
	204	result = ssu100_setdevice(dev, data);
	205	if (result < 0) {
4f0c6412	206	dev_dbg(&dev->dev, "%s - setdevice failed %i\n", __func__, result);
52af9545 BP	207	goto out;
	208	}
	209
	210	out: kfree(data);
	211	return result;
	212
	213	}
	214
	215
	216	static void ssu100_set_termios(struct tty_struct *tty,
	217	struct usb_serial_port *port,
	218	struct ktermios *old_termios)
	219	{
	220	struct usb_device *dev = port->serial->dev;
adc8d746	221	struct ktermios *termios = &tty->termios;
52af9545 BP	222	u16 baud, divisor, remainder;
	223	unsigned int cflag = termios->c_cflag;
	224	u16 urb_value = 0; /* will hold the new flags */
	225	int result;
	226
52af9545 BP	227	if (cflag & PARENB) {
52af9545 BP	228	if (cflag & PARODD)
79f203a2	229	urb_value \|= UART_LCR_PARITY;
52af9545 BP	230	else
	231	urb_value \|= SERIAL_EVEN_PARITY;
	232	}
	233
	234	switch (cflag & CSIZE) {
	235	case CS5:
79f203a2	236	urb_value \|= UART_LCR_WLEN5;
52af9545 BP	237	break;
52af9545 BP	238	case CS6:
79f203a2	239	urb_value \|= UART_LCR_WLEN6;
52af9545 BP	240	break;
52af9545 BP	241	case CS7:
79f203a2	242	urb_value \|= UART_LCR_WLEN7;
52af9545 BP	243	break;
	244	default:
	245	case CS8:
79f203a2	246	urb_value \|= UART_LCR_WLEN8;
52af9545 BP	247	break;
	248	}
	249
	250	baud = tty_get_baud_rate(tty);
	251	if (!baud)
	252	baud = 9600;
	253
4f0c6412	254	dev_dbg(&port->dev, "%s - got baud = %d\n", __func__, baud);
52af9545 BP	255
	256
	257	divisor = MAX_BAUD_RATE / baud;
	258	remainder = MAX_BAUD_RATE % baud;
	259	if (((remainder * 2) >= baud) && (baud != 110))
	260	divisor++;
	261
	262	urb_value = urb_value << 8;
	263
	264	result = ssu100_control_msg(dev, QT_GET_SET_UART, divisor, urb_value);
	265	if (result < 0)
4f0c6412	266	dev_dbg(&port->dev, "%s - set uart failed\n", __func__);
52af9545 BP	267
	268	if (cflag & CRTSCTS)
	269	result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
	270	SERIAL_CRTSCTS, 0);
	271	else
	272	result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
	273	0, 0);
	274	if (result < 0)
4f0c6412	275	dev_dbg(&port->dev, "%s - set HW flow control failed\n", __func__);
52af9545 BP	276
	277	if (I_IXOFF(tty) \|\| I_IXON(tty)) {
	278	u16 x = ((u16)(START_CHAR(tty) << 8) \| (u16)(STOP_CHAR(tty)));
	279
	280	result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
	281	x, 0);
	282	} else
	283	result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
	284	0, 0);
	285
	286	if (result < 0)
4f0c6412	287	dev_dbg(&port->dev, "%s - set SW flow control failed\n", __func__);
52af9545 BP	288
	289	}
	290
	291
	292	static int ssu100_open(struct tty_struct tty, struct usb_serial_port port)
	293	{
	294	struct usb_device *dev = port->serial->dev;
	295	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	296	u8 *data;
	297	int result;
17523058	298	unsigned long flags;
52af9545	299
52af9545 BP	300	data = kzalloc(2, GFP_KERNEL);
	301	if (!data)
	302	return -ENOMEM;
	303
	304	result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	305	QT_OPEN_CLOSE_CHANNEL,
	306	QT_TRANSFER_IN, 0x01,
	307	0, data, 2, 300);
1eac5c24	308	if (result < 2) {
4f0c6412	309	dev_dbg(&port->dev, "%s - open failed %i\n", __func__, result);
1eac5c24 JH	310	if (result >= 0)
1eac5c24 JH	311	result = -EIO;
52af9545 BP	312	kfree(data);
	313	return result;
	314	}
	315
17523058	316	spin_lock_irqsave(&priv->status_lock, flags);
f81c83db BP	317	priv->shadowLSR = data[0];
f81c83db BP	318	priv->shadowMSR = data[1];
17523058	319	spin_unlock_irqrestore(&priv->status_lock, flags);
52af9545 BP	320
	321	kfree(data);
	322
	323	/* set to 9600 */
	324	result = ssu100_control_msg(dev, QT_GET_SET_UART, 0x30, 0x0300);
	325	if (result < 0)
4f0c6412	326	dev_dbg(&port->dev, "%s - set uart failed\n", __func__);
52af9545 BP	327
52af9545 BP	328	if (tty)
adc8d746	329	ssu100_set_termios(tty, port, &tty->termios);
52af9545 BP	330
	331	return usb_serial_generic_open(tty, port);
	332	}
	333
52af9545 BP	334	static int get_serial_info(struct usb_serial_port *port,
	335	struct serial_struct __user *retinfo)
	336	{
	337	struct serial_struct tmp;
	338
52af9545	339	memset(&tmp, 0, sizeof(tmp));
e5b1e206	340	tmp.line = port->minor;
52af9545 BP	341	tmp.port = 0;
52af9545 BP	342	tmp.irq = 0;
52af9545 BP	343	tmp.xmit_fifo_size = port->bulk_out_size;
	344	tmp.baud_base = 9600;
	345	tmp.close_delay = 5*HZ;
	346	tmp.closing_wait = 30*HZ;
	347
	348	if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
	349	return -EFAULT;
	350	return 0;
	351	}
	352
00a0d0d6	353	static int ssu100_ioctl(struct tty_struct *tty,
52af9545 BP	354	unsigned int cmd, unsigned long arg)
	355	{
	356	struct usb_serial_port *port = tty->driver_data;
52af9545	357
52af9545 BP	358	switch (cmd) {
	359	case TIOCGSERIAL:
	360	return get_serial_info(port,
	361	(struct serial_struct __user *) arg);
52af9545 BP	362	default:
	363	break;
	364	}
	365
52af9545 BP	366	return -ENOIOCTLCMD;
	367	}
	368
52af9545	369	static int ssu100_attach(struct usb_serial *serial)
638b9e15 JH	370	{
	371	return ssu100_initdevice(serial->dev);
	372	}
	373
	374	static int ssu100_port_probe(struct usb_serial_port *port)
52af9545 BP	375	{
52af9545 BP	376	struct ssu100_port_private *priv;
52af9545	377
52af9545	378	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
638b9e15	379	if (!priv)
52af9545	380	return -ENOMEM;
52af9545	381
17523058	382	spin_lock_init(&priv->status_lock);
638b9e15	383
52af9545	384	usb_set_serial_port_data(port, priv);
52af9545	385
638b9e15 JH	386	return 0;
	387	}
	388
	389	static int ssu100_port_remove(struct usb_serial_port *port)
	390	{
	391	struct ssu100_port_private *priv;
	392
	393	priv = usb_get_serial_port_data(port);
	394	kfree(priv);
	395
	396	return 0;
52af9545 BP	397	}
52af9545 BP	398
60b33c13	399	static int ssu100_tiocmget(struct tty_struct *tty)
52af9545 BP	400	{
	401	struct usb_serial_port *port = tty->driver_data;
	402	struct usb_device *dev = port->serial->dev;
	403	u8 *d;
	404	int r;
	405
52af9545 BP	406	d = kzalloc(2, GFP_KERNEL);
	407	if (!d)
	408	return -ENOMEM;
	409
79f203a2	410	r = ssu100_getregister(dev, 0, UART_MCR, d);
52af9545 BP	411	if (r < 0)
	412	goto mget_out;
	413
79f203a2	414	r = ssu100_getregister(dev, 0, UART_MSR, d+1);
52af9545 BP	415	if (r < 0)
	416	goto mget_out;
	417
79f203a2 BP	418	r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) \|
	419	(d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) \|
	420	(d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) \|
	421	(d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) \|
	422	(d[1] & UART_MSR_RI ? TIOCM_RI : 0) \|
	423	(d[1] & UART_MSR_DSR ? TIOCM_DSR : 0);
52af9545 BP	424
	425	mget_out:
	426	kfree(d);
	427	return r;
	428	}
	429
20b9d177	430	static int ssu100_tiocmset(struct tty_struct *tty,
52af9545 BP	431	unsigned int set, unsigned int clear)
	432	{
	433	struct usb_serial_port *port = tty->driver_data;
	434	struct usb_device *dev = port->serial->dev;
	435
52af9545 BP	436	return update_mctrl(dev, set, clear);
	437	}
	438
	439	static void ssu100_dtr_rts(struct usb_serial_port *port, int on)
	440	{
	441	struct usb_device *dev = port->serial->dev;
	442
b2ca6990 JH	443	/* Disable flow control */
	444	if (!on) {
	445	if (ssu100_setregister(dev, 0, UART_MCR, 0) < 0)
52af9545	446	dev_err(&port->dev, "error from flowcontrol urb\n");
52af9545	447	}
b2ca6990 JH	448	/* drop RTS and DTR */
	449	if (on)
	450	set_mctrl(dev, TIOCM_DTR \| TIOCM_RTS);
	451	else
	452	clear_mctrl(dev, TIOCM_DTR \| TIOCM_RTS);
52af9545 BP	453	}
52af9545 BP	454
f81c83db BP	455	static void ssu100_update_msr(struct usb_serial_port *port, u8 msr)
	456	{
	457	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	458	unsigned long flags;
	459
	460	spin_lock_irqsave(&priv->status_lock, flags);
	461	priv->shadowMSR = msr;
	462	spin_unlock_irqrestore(&priv->status_lock, flags);
	463
	464	if (msr & UART_MSR_ANY_DELTA) {
	465	/* update input line counters */
	466	if (msr & UART_MSR_DCTS)
31ecdb6b	467	port->icount.cts++;
f81c83db	468	if (msr & UART_MSR_DDSR)
31ecdb6b	469	port->icount.dsr++;
f81c83db	470	if (msr & UART_MSR_DDCD)
31ecdb6b	471	port->icount.dcd++;
f81c83db	472	if (msr & UART_MSR_TERI)
31ecdb6b	473	port->icount.rng++;
c24c838e	474	wake_up_interruptible(&port->port.delta_msr_wait);
f81c83db BP	475	}
	476	}
	477
6b8f1ca5 BP	478	static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr,
6b8f1ca5 BP	479	char *tty_flag)
f81c83db BP	480	{
	481	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	482	unsigned long flags;
	483
	484	spin_lock_irqsave(&priv->status_lock, flags);
	485	priv->shadowLSR = lsr;
	486	spin_unlock_irqrestore(&priv->status_lock, flags);
	487
6b8f1ca5	488	*tty_flag = TTY_NORMAL;
f81c83db	489	if (lsr & UART_LSR_BRK_ERROR_BITS) {
6b8f1ca5 BP	490	/* we always want to update icount, but we only want to
	491	* update tty_flag for one case */
	492	if (lsr & UART_LSR_BI) {
31ecdb6b	493	port->icount.brk++;
6b8f1ca5 BP	494	*tty_flag = TTY_BREAK;
	495	usb_serial_handle_break(port);
	496	}
	497	if (lsr & UART_LSR_PE) {
31ecdb6b	498	port->icount.parity++;
6b8f1ca5 BP	499	if (*tty_flag == TTY_NORMAL)
	500	*tty_flag = TTY_PARITY;
	501	}
	502	if (lsr & UART_LSR_FE) {
31ecdb6b	503	port->icount.frame++;
6b8f1ca5 BP	504	if (*tty_flag == TTY_NORMAL)
	505	*tty_flag = TTY_FRAME;
	506	}
75bcbf29	507	if (lsr & UART_LSR_OE) {
31ecdb6b	508	port->icount.overrun++;
75bcbf29	509	tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
6b8f1ca5	510	}
f81c83db	511	}
6b8f1ca5	512
f81c83db BP	513	}
f81c83db BP	514
2e124b4a	515	static void ssu100_process_read_urb(struct urb *urb)
52af9545	516	{
f7043ecb BP	517	struct usb_serial_port *port = urb->context;
f7043ecb BP	518	char packet = (char )urb->transfer_buffer;
6b8f1ca5	519	char flag = TTY_NORMAL;
f7043ecb BP	520	u32 len = urb->actual_length;
f7043ecb BP	521	int i;
52af9545 BP	522	char *ch;
52af9545 BP	523
9b2cef31 BP	524	if ((len >= 4) &&
9b2cef31 BP	525	(packet[0] == 0x1b) && (packet[1] == 0x1b) &&
52af9545	526	((packet[2] == 0x00) \|\| (packet[2] == 0x01))) {
75bcbf29	527	if (packet[2] == 0x00)
6b8f1ca5	528	ssu100_update_lsr(port, packet[3], &flag);
f81c83db BP	529	if (packet[2] == 0x01)
f81c83db BP	530	ssu100_update_msr(port, packet[3]);
52af9545 BP	531
	532	len -= 4;
	533	ch = packet + 4;
	534	} else
	535	ch = packet;
	536
	537	if (!len)
2e124b4a	538	return; /* status only */
52af9545 BP	539
	540	if (port->port.console && port->sysrq) {
	541	for (i = 0; i < len; i++, ch++) {
6ee9f4b4	542	if (!usb_serial_handle_sysrq_char(port, *ch))
92a19f9c	543	tty_insert_flip_char(&port->port, *ch, flag);
52af9545 BP	544	}
52af9545 BP	545	} else
2f693357	546	tty_insert_flip_string_fixed_flag(&port->port, ch, flag, len);
52af9545	547
2e124b4a	548	tty_flip_buffer_push(&port->port);
52af9545 BP	549	}
52af9545 BP	550
52af9545 BP	551	static struct usb_serial_driver ssu100_device = {
	552	.driver = {
	553	.owner = THIS_MODULE,
	554	.name = "ssu100",
	555	},
	556	.description = DRIVER_DESC,
	557	.id_table = id_table,
52af9545	558	.num_ports = 1,
52af9545	559	.open = ssu100_open,
52af9545	560	.attach = ssu100_attach,
638b9e15 JH	561	.port_probe = ssu100_port_probe,
638b9e15 JH	562	.port_remove = ssu100_port_remove,
52af9545 BP	563	.dtr_rts = ssu100_dtr_rts,
	564	.process_read_urb = ssu100_process_read_urb,
	565	.tiocmget = ssu100_tiocmget,
	566	.tiocmset = ssu100_tiocmset,
c24c838e	567	.tiocmiwait = usb_serial_generic_tiocmiwait,
31ecdb6b	568	.get_icount = usb_serial_generic_get_icount,
52af9545 BP	569	.ioctl = ssu100_ioctl,
	570	.set_termios = ssu100_set_termios,
	571	};
	572
d860322f AS	573	static struct usb_serial_driver * const serial_drivers[] = {
	574	&ssu100_device, NULL
	575	};
	576
68e24113	577	module_usb_serial_driver(serial_drivers, id_table);
52af9545 BP	578
52af9545 BP	579	MODULE_DESCRIPTION(DRIVER_DESC);
627cfa89	580	MODULE_LICENSE("GPL v2");