[net-next-2.6.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 int debug = 1;

/* 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);


static struct usb_driver ssu100_driver = {
	.name			       = "ssu100",
	.probe			       = usb_serial_probe,
	.disconnect		       = usb_serial_disconnect,
	.id_table		       = id_table,
	.suspend		       = usb_serial_suspend,
	.resume			       = usb_serial_resume,
	.no_dynamic_id		       = 1,
	.supports_autosuspend	       = 1,
};

struct ssu100_port_private {
	spinlock_t status_lock;
	u8 shadowLSR;
	u8 shadowMSR;
	wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
	unsigned short max_packet_size;
};

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

	dbg("%s", __func__);
	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;

	dbg("%s", __func__);

	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;

	dbg("%s", __func__);

	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;

	dbg("%s - port %d", __func__, port->number);

	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]  & (UART_LSR_OE | UART_LSR_PE |
				      UART_LSR_FE | UART_LSR_BI);

	priv->shadowMSR = data[1]  & (UART_MSR_CTS | UART_MSR_DSR |
				      UART_MSR_RI | UART_MSR_DCD);
	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)
{
	dbg("%s", __func__);
	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 ssu100_ioctl(struct tty_struct *tty, struct file *file,
		    unsigned int cmd, unsigned long arg)
{
	struct usb_serial_port *port = tty->driver_data;
	struct ssu100_port_private *priv = usb_get_serial_port_data(port);

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

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

	case TIOCMIWAIT:
		while (priv != NULL) {
			u8 prevMSR = priv->shadowMSR & SERIAL_MSR_MASK;
			interruptible_sleep_on(&priv->delta_msr_wait);
			/* see if a signal did it */
			if (signal_pending(current))
				return -ERESTARTSYS;
			else {
				u8 diff = (priv->shadowMSR & SERIAL_MSR_MASK) ^ prevMSR;
				if (!diff)
					return -EIO; /* no change => error */

				/* Return 0 if caller wanted to know about
				   these bits */

				if (((arg & TIOCM_RNG) && (diff & UART_MSR_RI)) ||
				    ((arg & TIOCM_DSR) && (diff & UART_MSR_DSR)) ||
				    ((arg & TIOCM_CD) && (diff & UART_MSR_DCD)) ||
				    ((arg & TIOCM_CTS) && (diff & UART_MSR_CTS)))
					return 0;
			}
		}
		return 0;

	default:
		break;
	}

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

	return -ENOIOCTLCMD;
}

static void ssu100_set_max_packet_size(struct usb_serial_port *port)
{
	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	struct usb_serial *serial = port->serial;
	struct usb_device *udev = serial->dev;

	struct usb_interface *interface = serial->interface;
	struct usb_endpoint_descriptor *ep_desc = &interface->cur_altsetting->endpoint[1].desc;

	unsigned num_endpoints;
	int i;
	unsigned long flags;

	num_endpoints = interface->cur_altsetting->desc.bNumEndpoints;
	dev_info(&udev->dev, "Number of endpoints %d\n", num_endpoints);

	for (i = 0; i < num_endpoints; i++) {
		dev_info(&udev->dev, "Endpoint %d MaxPacketSize %d\n", i+1,
			interface->cur_altsetting->endpoint[i].desc.wMaxPacketSize);
		ep_desc = &interface->cur_altsetting->endpoint[i].desc;
	}

	/* set max packet size based on descriptor */
	spin_lock_irqsave(&priv->status_lock, flags);
	priv->max_packet_size = ep_desc->wMaxPacketSize;
	spin_unlock_irqrestore(&priv->status_lock, flags);

	dev_info(&udev->dev, "Setting MaxPacketSize %d\n", priv->max_packet_size);
}

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

	dbg("%s", __func__);

	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);
	ssu100_set_max_packet_size(port);

	return ssu100_initdevice(serial->dev);
}

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

	dbg("%s\n", __func__);

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

	dbg("%s\n", __func__);
	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;

	dbg("%s\n", __func__);

	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 int ssu100_process_packet(struct tty_struct *tty,
				 struct usb_serial_port *port,
				 struct ssu100_port_private *priv,
				 char *packet, int len)
{
	int i;
	char flag;
	char *ch;

	dbg("%s - port %d", __func__, port->number);

	if ((len >= 4) &&
	    (packet[0] == 0x1b) && (packet[1] == 0x1b) &&
	    ((packet[2] == 0x00) || (packet[2] == 0x01))) {
		if (packet[2] == 0x00)
			priv->shadowLSR = packet[3] & (UART_LSR_OE |
						       UART_LSR_PE |
						       UART_LSR_FE |
						       UART_LSR_BI);

		if (packet[2] == 0x01) {
			priv->shadowMSR = packet[3];
			wake_up_interruptible(&priv->delta_msr_wait);
		}

		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(tty, 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 ssu100_port_private *priv = usb_get_serial_port_data(port);
	char *data = (char *)urb->transfer_buffer;
	struct tty_struct *tty;
	int count = 0;
	int i;
	int len;

	dbg("%s", __func__);

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

	for (i = 0; i < urb->actual_length; i += priv->max_packet_size) {
		len = min_t(int, urb->actual_length - i, priv->max_packet_size);
		count += ssu100_process_packet(tty, port, priv, &data[i], len);
	}

	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,
	.usb_driver	     = &ssu100_driver,
	.num_ports	     = 1,
	.bulk_in_size        = 256,
	.bulk_out_size       = 256,
	.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,
	.ioctl               = ssu100_ioctl,
	.set_termios         = ssu100_set_termios,
};

static int __init ssu100_init(void)
{
	int retval;

	dbg("%s", __func__);

	/* register with usb-serial */
	retval = usb_serial_register(&ssu100_device);

	if (retval)
		goto failed_usb_sio_register;

	retval = usb_register(&ssu100_driver);
	if (retval)
		goto failed_usb_register;

	printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
	       DRIVER_DESC "\n");

	return 0;

failed_usb_register:
	usb_serial_deregister(&ssu100_device);
failed_usb_sio_register:
	return retval;
}

static void __exit ssu100_exit(void)
{
	usb_deregister(&ssu100_driver);
	usb_serial_deregister(&ssu100_device);
}

module_init(ssu100_init);
module_exit(ssu100_exit);

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
	49	static int debug = 1;
	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	};
	62
	63	MODULE_DEVICE_TABLE(usb, id_table);
	64
	65
	66	static struct usb_driver ssu100_driver = {
	67	.name = "ssu100",
	68	.probe = usb_serial_probe,
	69	.disconnect = usb_serial_disconnect,
	70	.id_table = id_table,
	71	.suspend = usb_serial_suspend,
	72	.resume = usb_serial_resume,
	73	.no_dynamic_id = 1,
	74	.supports_autosuspend = 1,
	75	};
	76
	77	struct ssu100_port_private {
17523058	78	spinlock_t status_lock;
52af9545 BP	79	u8 shadowLSR;
	80	u8 shadowMSR;
	81	wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
	82	unsigned short max_packet_size;
	83	};
	84
	85	static void ssu100_release(struct usb_serial *serial)
	86	{
	87	struct ssu100_port_private priv = usb_get_serial_port_data(serial->port);
	88
	89	dbg("%s", __func__);
	90	kfree(priv);
	91	}
	92
	93	static inline int ssu100_control_msg(struct usb_device *dev,
	94	u8 request, u16 data, u16 index)
	95	{
	96	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
	97	request, 0x40, data, index,
	98	NULL, 0, 300);
	99	}
	100
	101	static inline int ssu100_setdevice(struct usb_device dev, u8 data)
	102	{
	103	u16 x = ((u16)(data[1] << 8) \| (u16)(data[0]));
	104
	105	return ssu100_control_msg(dev, QT_SET_GET_DEVICE, x, 0);
	106	}
	107
	108
	109	static inline int ssu100_getdevice(struct usb_device dev, u8 data)
	110	{
	111	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	112	QT_SET_GET_DEVICE, 0xc0, 0, 0,
	113	data, 3, 300);
	114	}
	115
	116	static inline int ssu100_getregister(struct usb_device *dev,
	117	unsigned short uart,
	118	unsigned short reg,
	119	u8 *data)
	120	{
	121	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	122	QT_SET_GET_REGISTER, 0xc0, reg,
	123	uart, data, sizeof(*data), 300);
	124
	125	}
	126
	127
	128	static inline int ssu100_setregister(struct usb_device *dev,
	129	unsigned short uart,
556f1a0e	130	unsigned short reg,
52af9545 BP	131	u16 data)
52af9545 BP	132	{
556f1a0e	133	u16 value = (data << 8) \| reg;
52af9545 BP	134
	135	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
	136	QT_SET_GET_REGISTER, 0x40, value, uart,
	137	NULL, 0, 300);
	138
	139	}
	140
	141	#define set_mctrl(dev, set) update_mctrl((dev), (set), 0)
	142	#define clear_mctrl(dev, clear) update_mctrl((dev), 0, (clear))
	143
	144	/* these do not deal with device that have more than 1 port */
	145	static inline int update_mctrl(struct usb_device *dev, unsigned int set,
	146	unsigned int clear)
	147	{
	148	unsigned urb_value;
	149	int result;
	150
	151	if (((set \| clear) & (TIOCM_DTR \| TIOCM_RTS)) == 0) {
	152	dbg("%s - DTR\|RTS not being set\|cleared", __func__);
	153	return 0; /* no change */
	154	}
	155
	156	clear &= ~set; /* 'set' takes precedence over 'clear' */
	157	urb_value = 0;
	158	if (set & TIOCM_DTR)
79f203a2	159	urb_value \|= UART_MCR_DTR;
52af9545	160	if (set & TIOCM_RTS)
79f203a2	161	urb_value \|= UART_MCR_RTS;
52af9545	162
556f1a0e	163	result = ssu100_setregister(dev, 0, UART_MCR, urb_value);
52af9545 BP	164	if (result < 0)
	165	dbg("%s Error from MODEM_CTRL urb", __func__);
	166
	167	return result;
	168	}
	169
	170	static int ssu100_initdevice(struct usb_device *dev)
	171	{
	172	u8 *data;
	173	int result = 0;
	174
	175	dbg("%s", __func__);
	176
	177	data = kzalloc(3, GFP_KERNEL);
	178	if (!data)
	179	return -ENOMEM;
	180
	181	result = ssu100_getdevice(dev, data);
	182	if (result < 0) {
	183	dbg("%s - get_device failed %i", __func__, result);
	184	goto out;
	185	}
	186
	187	data[1] &= ~FULLPWRBIT;
	188
	189	result = ssu100_setdevice(dev, data);
	190	if (result < 0) {
	191	dbg("%s - setdevice failed %i", __func__, result);
	192	goto out;
	193	}
	194
	195	result = ssu100_control_msg(dev, QT_GET_SET_PREBUF_TRIG_LVL, 128, 0);
	196	if (result < 0) {
	197	dbg("%s - set prebuffer level failed %i", __func__, result);
	198	goto out;
	199	}
	200
	201	result = ssu100_control_msg(dev, QT_SET_ATF, ATC_DISABLED, 0);
	202	if (result < 0) {
	203	dbg("%s - set ATFprebuffer level failed %i", __func__, result);
	204	goto out;
	205	}
	206
	207	result = ssu100_getdevice(dev, data);
	208	if (result < 0) {
	209	dbg("%s - get_device failed %i", __func__, result);
	210	goto out;
	211	}
	212
	213	data[0] &= ~(RR_BITS \| DUPMODE_BITS);
	214	data[0] \|= CLKS_X4;
	215	data[1] &= ~(LOOPMODE_BITS);
	216	data[1] \|= RS232_MODE;
	217
	218	result = ssu100_setdevice(dev, data);
	219	if (result < 0) {
	220	dbg("%s - setdevice failed %i", __func__, result);
	221	goto out;
	222	}
	223
	224	out: kfree(data);
	225	return result;
	226
	227	}
228
229
230	static void ssu100_set_termios(struct tty_struct *tty,
231	struct usb_serial_port *port,
232	struct ktermios *old_termios)
233	{
234	struct usb_device *dev = port->serial->dev;
235	struct ktermios *termios = tty->termios;
236	u16 baud, divisor, remainder;
237	unsigned int cflag = termios->c_cflag;
238	u16 urb_value = 0; /* will hold the new flags */
239	int result;
240
241	dbg("%s", __func__);
242
243	if (cflag & PARENB) {
244	if (cflag & PARODD)
79f203a2	245	urb_value \|= UART_LCR_PARITY;
52af9545 BP	246	else
	247	urb_value \|= SERIAL_EVEN_PARITY;
	248	}
	249
	250	switch (cflag & CSIZE) {
	251	case CS5:
79f203a2	252	urb_value \|= UART_LCR_WLEN5;
52af9545 BP	253	break;
52af9545 BP	254	case CS6:
79f203a2	255	urb_value \|= UART_LCR_WLEN6;
52af9545 BP	256	break;
52af9545 BP	257	case CS7:
79f203a2	258	urb_value \|= UART_LCR_WLEN7;
52af9545 BP	259	break;
	260	default:
	261	case CS8:
79f203a2	262	urb_value \|= UART_LCR_WLEN8;
52af9545 BP	263	break;
	264	}
	265
	266	baud = tty_get_baud_rate(tty);
	267	if (!baud)
	268	baud = 9600;
	269
	270	dbg("%s - got baud = %d\n", __func__, baud);
	271
	272
	273	divisor = MAX_BAUD_RATE / baud;
	274	remainder = MAX_BAUD_RATE % baud;
	275	if (((remainder * 2) >= baud) && (baud != 110))
	276	divisor++;
	277
	278	urb_value = urb_value << 8;
	279
	280	result = ssu100_control_msg(dev, QT_GET_SET_UART, divisor, urb_value);
	281	if (result < 0)
	282	dbg("%s - set uart failed", __func__);
	283
	284	if (cflag & CRTSCTS)
	285	result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
	286	SERIAL_CRTSCTS, 0);
	287	else
	288	result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
	289	0, 0);
	290	if (result < 0)
	291	dbg("%s - set HW flow control failed", __func__);
	292
	293	if (I_IXOFF(tty) \|\| I_IXON(tty)) {
	294	u16 x = ((u16)(START_CHAR(tty) << 8) \| (u16)(STOP_CHAR(tty)));
	295
	296	result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
	297	x, 0);
	298	} else
	299	result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
	300	0, 0);
	301
	302	if (result < 0)
	303	dbg("%s - set SW flow control failed", __func__);
	304
	305	}
	306
	307
	308	static int ssu100_open(struct tty_struct tty, struct usb_serial_port port)
	309	{
	310	struct usb_device *dev = port->serial->dev;
	311	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	312	u8 *data;
	313	int result;
17523058	314	unsigned long flags;
52af9545 BP	315
	316	dbg("%s - port %d", __func__, port->number);
	317
	318	data = kzalloc(2, GFP_KERNEL);
	319	if (!data)
	320	return -ENOMEM;
	321
	322	result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	323	QT_OPEN_CLOSE_CHANNEL,
	324	QT_TRANSFER_IN, 0x01,
	325	0, data, 2, 300);
	326	if (result < 0) {
	327	dbg("%s - open failed %i", __func__, result);
	328	kfree(data);
	329	return result;
	330	}
	331
17523058	332	spin_lock_irqsave(&priv->status_lock, flags);
79f203a2 BP	333	priv->shadowLSR = data[0] & (UART_LSR_OE \| UART_LSR_PE \|
79f203a2 BP	334	UART_LSR_FE \| UART_LSR_BI);
52af9545	335
79f203a2 BP	336	priv->shadowMSR = data[1] & (UART_MSR_CTS \| UART_MSR_DSR \|
79f203a2 BP	337	UART_MSR_RI \| UART_MSR_DCD);
17523058	338	spin_unlock_irqrestore(&priv->status_lock, flags);
52af9545 BP	339
	340	kfree(data);
	341
	342	/* set to 9600 */
	343	result = ssu100_control_msg(dev, QT_GET_SET_UART, 0x30, 0x0300);
	344	if (result < 0)
	345	dbg("%s - set uart failed", __func__);
	346
	347	if (tty)
	348	ssu100_set_termios(tty, port, tty->termios);
	349
	350	return usb_serial_generic_open(tty, port);
	351	}
	352
	353	static void ssu100_close(struct usb_serial_port *port)
	354	{
	355	dbg("%s", __func__);
	356	usb_serial_generic_close(port);
	357	}
	358
	359	static int get_serial_info(struct usb_serial_port *port,
	360	struct serial_struct __user *retinfo)
	361	{
	362	struct serial_struct tmp;
	363
	364	if (!retinfo)
	365	return -EFAULT;
	366
	367	memset(&tmp, 0, sizeof(tmp));
	368	tmp.line = port->serial->minor;
	369	tmp.port = 0;
	370	tmp.irq = 0;
	371	tmp.flags = ASYNC_SKIP_TEST \| ASYNC_AUTO_IRQ;
	372	tmp.xmit_fifo_size = port->bulk_out_size;
	373	tmp.baud_base = 9600;
	374	tmp.close_delay = 5*HZ;
	375	tmp.closing_wait = 30*HZ;
	376
	377	if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
	378	return -EFAULT;
	379	return 0;
	380	}
	381
	382	static int ssu100_ioctl(struct tty_struct tty, struct file file,
	383	unsigned int cmd, unsigned long arg)
	384	{
	385	struct usb_serial_port *port = tty->driver_data;
	386	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	387
	388	dbg("%s cmd 0x%04x", __func__, cmd);
	389
	390	switch (cmd) {
	391	case TIOCGSERIAL:
	392	return get_serial_info(port,
	393	(struct serial_struct __user *) arg);
	394
	395	case TIOCMIWAIT:
	396	while (priv != NULL) {
	397	u8 prevMSR = priv->shadowMSR & SERIAL_MSR_MASK;
	398	interruptible_sleep_on(&priv->delta_msr_wait);
	399	/* see if a signal did it */
	400	if (signal_pending(current))
	401	return -ERESTARTSYS;
	402	else {
403	u8 diff = (priv->shadowMSR & SERIAL_MSR_MASK) ^ prevMSR;
404	if (!diff)
405	return -EIO; /* no change => error */
406
407	/* Return 0 if caller wanted to know about
408	these bits */
409
79f203a2 BP	410	if (((arg & TIOCM_RNG) && (diff & UART_MSR_RI)) \|\|
	411	((arg & TIOCM_DSR) && (diff & UART_MSR_DSR)) \|\|
	412	((arg & TIOCM_CD) && (diff & UART_MSR_DCD)) \|\|
	413	((arg & TIOCM_CTS) && (diff & UART_MSR_CTS)))
52af9545 BP	414	return 0;
	415	}
	416	}
	417	return 0;
	418
	419	default:
	420	break;
	421	}
	422
	423	dbg("%s arg not supported", __func__);
	424
	425	return -ENOIOCTLCMD;
	426	}
	427
	428	static void ssu100_set_max_packet_size(struct usb_serial_port *port)
	429	{
	430	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	431	struct usb_serial *serial = port->serial;
	432	struct usb_device *udev = serial->dev;
	433
	434	struct usb_interface *interface = serial->interface;
	435	struct usb_endpoint_descriptor *ep_desc = &interface->cur_altsetting->endpoint[1].desc;
	436
	437	unsigned num_endpoints;
	438	int i;
17523058	439	unsigned long flags;
52af9545 BP	440
	441	num_endpoints = interface->cur_altsetting->desc.bNumEndpoints;
	442	dev_info(&udev->dev, "Number of endpoints %d\n", num_endpoints);
	443
	444	for (i = 0; i < num_endpoints; i++) {
	445	dev_info(&udev->dev, "Endpoint %d MaxPacketSize %d\n", i+1,
	446	interface->cur_altsetting->endpoint[i].desc.wMaxPacketSize);
	447	ep_desc = &interface->cur_altsetting->endpoint[i].desc;
	448	}
	449
	450	/* set max packet size based on descriptor */
17523058	451	spin_lock_irqsave(&priv->status_lock, flags);
52af9545	452	priv->max_packet_size = ep_desc->wMaxPacketSize;
17523058	453	spin_unlock_irqrestore(&priv->status_lock, flags);
52af9545 BP	454
	455	dev_info(&udev->dev, "Setting MaxPacketSize %d\n", priv->max_packet_size);
	456	}
	457
	458	static int ssu100_attach(struct usb_serial *serial)
	459	{
	460	struct ssu100_port_private *priv;
	461	struct usb_serial_port port = serial->port;
	462
	463	dbg("%s", __func__);
	464
	465	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	466	if (!priv) {
	467	dev_err(&port->dev, "%s- kmalloc(%Zd) failed.\n", __func__,
	468	sizeof(*priv));
	469	return -ENOMEM;
	470	}
	471
17523058	472	spin_lock_init(&priv->status_lock);
52af9545 BP	473	init_waitqueue_head(&priv->delta_msr_wait);
52af9545 BP	474	usb_set_serial_port_data(port, priv);
52af9545 BP	475	ssu100_set_max_packet_size(port);
	476
	477	return ssu100_initdevice(serial->dev);
	478	}
	479
	480	static int ssu100_tiocmget(struct tty_struct tty, struct file file)
	481	{
	482	struct usb_serial_port *port = tty->driver_data;
	483	struct usb_device *dev = port->serial->dev;
	484	u8 *d;
	485	int r;
	486
	487	dbg("%s\n", __func__);
	488
	489	d = kzalloc(2, GFP_KERNEL);
	490	if (!d)
	491	return -ENOMEM;
	492
79f203a2	493	r = ssu100_getregister(dev, 0, UART_MCR, d);
52af9545 BP	494	if (r < 0)
	495	goto mget_out;
	496
79f203a2	497	r = ssu100_getregister(dev, 0, UART_MSR, d+1);
52af9545 BP	498	if (r < 0)
	499	goto mget_out;
	500
79f203a2 BP	501	r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) \|
	502	(d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) \|
	503	(d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) \|
	504	(d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) \|
	505	(d[1] & UART_MSR_RI ? TIOCM_RI : 0) \|
	506	(d[1] & UART_MSR_DSR ? TIOCM_DSR : 0);
52af9545 BP	507
	508	mget_out:
	509	kfree(d);
	510	return r;
	511	}
	512
	513	static int ssu100_tiocmset(struct tty_struct tty, struct file file,
	514	unsigned int set, unsigned int clear)
	515	{
	516	struct usb_serial_port *port = tty->driver_data;
	517	struct usb_device *dev = port->serial->dev;
	518
	519	dbg("%s\n", __func__);
	520	return update_mctrl(dev, set, clear);
	521	}
	522
	523	static void ssu100_dtr_rts(struct usb_serial_port *port, int on)
	524	{
	525	struct usb_device *dev = port->serial->dev;
	526
	527	dbg("%s\n", __func__);
	528
	529	mutex_lock(&port->serial->disc_mutex);
	530	if (!port->serial->disconnected) {
	531	/* Disable flow control */
	532	if (!on &&
556f1a0e	533	ssu100_setregister(dev, 0, UART_MCR, 0) < 0)
52af9545 BP	534	dev_err(&port->dev, "error from flowcontrol urb\n");
	535	/* drop RTS and DTR */
	536	if (on)
	537	set_mctrl(dev, TIOCM_DTR \| TIOCM_RTS);
	538	else
	539	clear_mctrl(dev, TIOCM_DTR \| TIOCM_RTS);
	540	}
	541	mutex_unlock(&port->serial->disc_mutex);
	542	}
	543
	544	static int ssu100_process_packet(struct tty_struct *tty,
	545	struct usb_serial_port *port,
	546	struct ssu100_port_private *priv,
	547	char *packet, int len)
	548	{
	549	int i;
	550	char flag;
	551	char *ch;
	552
	553	dbg("%s - port %d", __func__, port->number);
	554
9b2cef31 BP	555	if ((len >= 4) &&
9b2cef31 BP	556	(packet[0] == 0x1b) && (packet[1] == 0x1b) &&
52af9545 BP	557	((packet[2] == 0x00) \|\| (packet[2] == 0x01))) {
52af9545 BP	558	if (packet[2] == 0x00)
79f203a2 BP	559	priv->shadowLSR = packet[3] & (UART_LSR_OE \|
	560	UART_LSR_PE \|
	561	UART_LSR_FE \|
	562	UART_LSR_BI);
52af9545 BP	563
	564	if (packet[2] == 0x01) {
	565	priv->shadowMSR = packet[3];
	566	wake_up_interruptible(&priv->delta_msr_wait);
	567	}
	568
	569	len -= 4;
	570	ch = packet + 4;
	571	} else
	572	ch = packet;
	573
	574	if (!len)
	575	return 0; /* status only */
	576
	577	if (port->port.console && port->sysrq) {
	578	for (i = 0; i < len; i++, ch++) {
	579	if (!usb_serial_handle_sysrq_char(tty, port, *ch))
	580	tty_insert_flip_char(tty, *ch, flag);
	581	}
	582	} else
	583	tty_insert_flip_string_fixed_flag(tty, ch, flag, len);
	584
	585	return len;
	586	}
	587
	588	static void ssu100_process_read_urb(struct urb *urb)
	589	{
	590	struct usb_serial_port *port = urb->context;
	591	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
	592	char data = (char )urb->transfer_buffer;
	593	struct tty_struct *tty;
	594	int count = 0;
	595	int i;
	596	int len;
	597
	598	dbg("%s", __func__);
	599
	600	tty = tty_port_tty_get(&port->port);
	601	if (!tty)
	602	return;
	603
	604	for (i = 0; i < urb->actual_length; i += priv->max_packet_size) {
	605	len = min_t(int, urb->actual_length - i, priv->max_packet_size);
	606	count += ssu100_process_packet(tty, port, priv, &data[i], len);
	607	}
	608
	609	if (count)
	610	tty_flip_buffer_push(tty);
	611	tty_kref_put(tty);
	612	}
	613
	614
	615	static struct usb_serial_driver ssu100_device = {
	616	.driver = {
	617	.owner = THIS_MODULE,
	618	.name = "ssu100",
	619	},
	620	.description = DRIVER_DESC,
	621	.id_table = id_table,
	622	.usb_driver = &ssu100_driver,
	623	.num_ports = 1,
	624	.bulk_in_size = 256,
	625	.bulk_out_size = 256,
	626	.open = ssu100_open,
627	.close = ssu100_close,
628	.attach = ssu100_attach,
629	.release = ssu100_release,
630	.dtr_rts = ssu100_dtr_rts,
631	.process_read_urb = ssu100_process_read_urb,
632	.tiocmget = ssu100_tiocmget,
633	.tiocmset = ssu100_tiocmset,
634	.ioctl = ssu100_ioctl,
635	.set_termios = ssu100_set_termios,
636	};
637
638	static int __init ssu100_init(void)
639	{
640	int retval;
641
642	dbg("%s", __func__);
643
644	/* register with usb-serial */
645	retval = usb_serial_register(&ssu100_device);
646
647	if (retval)
648	goto failed_usb_sio_register;
649
650	retval = usb_register(&ssu100_driver);
651	if (retval)
652	goto failed_usb_register;
653
654	printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
655	DRIVER_DESC "\n");
656
657	return 0;
658
659	failed_usb_register:
660	usb_serial_deregister(&ssu100_device);
661	failed_usb_sio_register:
662	return retval;
663	}
664
665	static void __exit ssu100_exit(void)
666	{
667	usb_deregister(&ssu100_driver);
668	usb_serial_deregister(&ssu100_device);
669	}
670
671	module_init(ssu100_init);
672	module_exit(ssu100_exit);
673
674	MODULE_DESCRIPTION(DRIVER_DESC);
675	MODULE_LICENSE("GPL");
676
677	module_param(debug, bool, S_IRUGO \| S_IWUSR);
678	MODULE_PARM_DESC(debug, "Debug enabled or not");