1 files changed, 165 insertions, 89 deletions

diff --git a/drivers/usb/serial/ssu100.c b/drivers/usb/serial/ssu100.c
index 6e82d4f54bc8..660c31f14999 100644
--- a/drivers/usb/serial/ssu100.c
+++ b/drivers/usb/serial/ssu100.c
@@ -15,6 +15,7 @@
 #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
@@ -27,36 +28,11 @@
 #define QT_HW_FLOW_CONTROL_MASK     0xc5
 #define QT_SW_FLOW_CONTROL_MASK     0xc6
 
-#define MODEM_CTL_REGISTER         0x04
-#define MODEM_STATUS_REGISTER      0x06
-
-
-#define SERIAL_LSR_OE       0x02
-#define SERIAL_LSR_PE       0x04
-#define SERIAL_LSR_FE       0x08
-#define SERIAL_LSR_BI       0x10
-
-#define SERIAL_LSR_TEMT     0x40
-
-#define  SERIAL_MCR_DTR             0x01
-#define  SERIAL_MCR_RTS             0x02
-#define  SERIAL_MCR_LOOP            0x10
-
-#define  SERIAL_MSR_CTS             0x10
-#define  SERIAL_MSR_CD              0x80
-#define  SERIAL_MSR_RI              0x40
-#define  SERIAL_MSR_DSR             0x20
 #define  SERIAL_MSR_MASK            0xf0
 
-#define  SERIAL_CRTSCTS ((SERIAL_MCR_RTS << 8) | SERIAL_MSR_CTS)
+#define  SERIAL_CRTSCTS ((UART_MCR_RTS << 8) | UART_MSR_CTS)
 
-#define  SERIAL_8_DATA              0x03
-#define  SERIAL_7_DATA              0x02
-#define  SERIAL_6_DATA              0x01
-#define  SERIAL_5_DATA              0x00
-
-#define  SERIAL_ODD_PARITY          0X08
-#define  SERIAL_EVEN_PARITY         0X18
+#define  SERIAL_EVEN_PARITY         (UART_LCR_PARITY | UART_LCR_EPAR)
 
 #define  MAX_BAUD_RATE              460800
 
@@ -99,10 +75,12 @@ static struct usb_driver ssu100_driver = {
 };
 
 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;
+	struct async_icount icount;
 };
 
 static void ssu100_release(struct usb_serial *serial)
@@ -150,9 +128,10 @@ static inline int ssu100_getregister(struct usb_device *dev,
 
 static inline int ssu100_setregister(struct usb_device *dev,
 				     unsigned short uart,
+				     unsigned short reg,
 				     u16 data)
 {
-	u16 value = (data << 8) | MODEM_CTL_REGISTER;
+	u16 value = (data << 8) | reg;
 
 	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 			       QT_SET_GET_REGISTER, 0x40, value, uart,
@@ -178,11 +157,11 @@ static inline int update_mctrl(struct usb_device *dev, unsigned int set,
 	clear &= ~set;	/* 'set' takes precedence over 'clear' */
 	urb_value = 0;
 	if (set & TIOCM_DTR)
-		urb_value |= SERIAL_MCR_DTR;
+		urb_value |= UART_MCR_DTR;
 	if (set & TIOCM_RTS)
-		urb_value |= SERIAL_MCR_RTS;
+		urb_value |= UART_MCR_RTS;
 
-	result = ssu100_setregister(dev, 0, urb_value);
+	result = ssu100_setregister(dev, 0, UART_MCR, urb_value);
 	if (result < 0)
 		dbg("%s Error from MODEM_CTRL urb", __func__);
 
@@ -264,24 +243,24 @@ static void ssu100_set_termios(struct tty_struct *tty,
 
 	if (cflag & PARENB) {
 		if (cflag & PARODD)
-			urb_value |= SERIAL_ODD_PARITY;
+			urb_value |= UART_LCR_PARITY;
 		else
 			urb_value |= SERIAL_EVEN_PARITY;
 	}
 
 	switch (cflag & CSIZE) {
 	case CS5:
-		urb_value |= SERIAL_5_DATA;
+		urb_value |= UART_LCR_WLEN5;
 		break;
 	case CS6:
-		urb_value |= SERIAL_6_DATA;
+		urb_value |= UART_LCR_WLEN6;
 		break;
 	case CS7:
-		urb_value |= SERIAL_7_DATA;
+		urb_value |= UART_LCR_WLEN7;
 		break;
 	default:
 	case CS8:
-		urb_value |= SERIAL_8_DATA;
+		urb_value |= UART_LCR_WLEN8;
 		break;
 	}
 
@@ -333,6 +312,7 @@ static int ssu100_open(struct tty_struct *tty, struct usb_serial_port *port)
 	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);
 
@@ -350,11 +330,10 @@ static int ssu100_open(struct tty_struct *tty, struct usb_serial_port *port)
 		return result;
 	}
 
-	priv->shadowLSR = data[0]  & (SERIAL_LSR_OE | SERIAL_LSR_PE |
-				      SERIAL_LSR_FE | SERIAL_LSR_BI);
-
-	priv->shadowMSR = data[1]  & (SERIAL_MSR_CTS | SERIAL_MSR_DSR |
-				      SERIAL_MSR_RI | SERIAL_MSR_CD);
+	spin_lock_irqsave(&priv->status_lock, flags);
+	priv->shadowLSR = data[0];
+	priv->shadowMSR = data[1];
+	spin_unlock_irqrestore(&priv->status_lock, flags);
 
 	kfree(data);
 
@@ -398,11 +377,51 @@ static int get_serial_info(struct usb_serial_port *port,
 	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_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);
+	void __user *user_arg = (void __user *)arg;
 
 	dbg("%s cmd 0x%04x", __func__, cmd);
 
@@ -412,28 +431,28 @@ static int ssu100_ioctl(struct tty_struct *tty, struct file *file,
 				       (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 & SERIAL_MSR_RI)) ||
-				    ((arg & TIOCM_DSR) && (diff & SERIAL_MSR_DSR)) ||
-				    ((arg & TIOCM_CD) && (diff & SERIAL_MSR_CD)) ||
-				    ((arg & TIOCM_CTS) && (diff & SERIAL_MSR_CTS)))
-					return 0;
-			}
-		}
+		return wait_modem_info(port, arg);
+
+	case TIOCGICOUNT:
+	{
+		struct serial_icounter_struct icount;
+		struct async_icount cnow = priv->icount;
+		memset(&icount, 0, sizeof(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;
+		if (copy_to_user(user_arg, &icount, sizeof(icount)))
+			return -EFAULT;
 		return 0;
+	}
 
 	default:
 		break;
@@ -455,6 +474,7 @@ static void ssu100_set_max_packet_size(struct usb_serial_port *port)
 
 	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);
@@ -466,7 +486,9 @@ static void ssu100_set_max_packet_size(struct usb_serial_port *port)
 	}
 
 	/* 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);
 }
@@ -485,9 +507,9 @@ static int ssu100_attach(struct usb_serial *serial)
 		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);
@@ -506,20 +528,20 @@ static int ssu100_tiocmget(struct tty_struct *tty, struct file *file)
 	if (!d)
 		return -ENOMEM;
 
-	r = ssu100_getregister(dev, 0, MODEM_CTL_REGISTER, d);
+	r = ssu100_getregister(dev, 0, UART_MCR, d);
 	if (r < 0)
 		goto mget_out;
 
-	r = ssu100_getregister(dev, 0, MODEM_STATUS_REGISTER, d+1);
+	r = ssu100_getregister(dev, 0, UART_MSR, d+1);
 	if (r < 0)
 		goto mget_out;
 
-	r = (d[0] & SERIAL_MCR_DTR ? TIOCM_DTR : 0) |
-		(d[0] & SERIAL_MCR_RTS ? TIOCM_RTS : 0) |
-		(d[1] & SERIAL_MSR_CTS ? TIOCM_CTS : 0) |
-		(d[1] & SERIAL_MSR_CD ? TIOCM_CAR : 0) |
-		(d[1] & SERIAL_MSR_RI ? TIOCM_RI : 0) |
-		(d[1] & SERIAL_MSR_DSR ? TIOCM_DSR : 0);
+	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);
@@ -546,7 +568,7 @@ static void ssu100_dtr_rts(struct usb_serial_port *port, int on)
 	if (!port->serial->disconnected) {
 		/* Disable flow control */
 		if (!on &&
-		    ssu100_setregister(dev, 0, 0) < 0)
+		    ssu100_setregister(dev, 0, UART_MCR, 0) < 0)
 			dev_err(&port->dev, "error from flowcontrol urb\n");
 		/* drop RTS and DTR */
 		if (on)
@@ -557,34 +579,88 @@ static void ssu100_dtr_rts(struct usb_serial_port *port, int on)
 	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 tty_struct *tty,
 				 struct usb_serial_port *port,
 				 struct ssu100_port_private *priv,
 				 char *packet, int len)
 {
 	int i;
-	char flag;
+	char flag = TTY_NORMAL;
 	char *ch;
 
 	dbg("%s - port %d", __func__, port->number);
 
-	if (len < 4) {
-		dbg("%s - malformed packet", __func__);
-		return 0;
-	}
-
-	if ((packet[0] == 0x1b) && (packet[1] == 0x1b) &&
+	if ((len >= 4) &&
+	    (packet[0] == 0x1b) && (packet[1] == 0x1b) &&
 	    ((packet[2] == 0x00) || (packet[2] == 0x01))) {
-		if (packet[2] == 0x00)
-			priv->shadowLSR = packet[3] & (SERIAL_LSR_OE |
-						       SERIAL_LSR_PE |
-						       SERIAL_LSR_FE |
-						       SERIAL_LSR_BI);
-
-		if (packet[2] == 0x01) {
-			priv->shadowMSR = packet[3];
-			wake_up_interruptible(&priv->delta_msr_wait);
+		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;
@@ -631,7 +707,6 @@ static void ssu100_process_read_urb(struct urb *urb)
 	tty_kref_put(tty);
 }
 
-
 static struct usb_serial_driver ssu100_device = {
 	.driver = {
 		.owner = THIS_MODULE,
@@ -653,6 +728,7 @@ static struct usb_serial_driver ssu100_device = {
 	.tiocmset            = ssu100_tiocmset,
 	.ioctl               = ssu100_ioctl,
 	.set_termios         = ssu100_set_termios,
+	.disconnect          = usb_serial_generic_disconnect,
 };
 
 static int __init ssu100_init(void)