1 files changed, 93 insertions, 258 deletions

diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c
index 6aba731d4864..c6bfb83efb1e 100644
--- a/drivers/usb/serial/opticon.c
+++ b/drivers/usb/serial/opticon.c
@@ -1,6 +1,7 @@
 /*
  * Opticon USB barcode to serial driver
  *
+ * Copyright (C) 2011 - 2012 Johan Hovold <jhovold@gmail.com>
  * Copyright (C) 2011 Martin Jansen <martin.jansen@opticon.com>
  * Copyright (C) 2008 - 2009 Greg Kroah-Hartman <gregkh@suse.de>
  * Copyright (C) 2008 - 2009 Novell Inc.
@@ -40,114 +41,70 @@ MODULE_DEVICE_TABLE(usb, id_table);
 
 /* This structure holds all of the individual device information */
 struct opticon_private {
-	struct usb_device *udev;
-	struct usb_serial *serial;
-	struct usb_serial_port *port;
-	unsigned char *bulk_in_buffer;
-	struct urb *bulk_read_urb;
-	int buffer_size;
-	u8 bulk_address;
 	spinlock_t lock;	/* protects the following flags */
-	bool throttled;
-	bool actually_throttled;
 	bool rts;
 	bool cts;
 	int outstanding_urbs;
 };
 
 
-
-static void opticon_read_bulk_callback(struct urb *urb)
+static void opticon_process_data_packet(struct usb_serial_port *port,
+					const unsigned char *buf, size_t len)
 {
-	struct opticon_private *priv = urb->context;
-	unsigned char *data = urb->transfer_buffer;
-	struct usb_serial_port *port = priv->port;
-	int status = urb->status;
 	struct tty_struct *tty;
-	int result;
-	int data_length;
+
+	tty = tty_port_tty_get(&port->port);
+	if (!tty)
+		return;
+
+	tty_insert_flip_string(tty, buf, len);
+	tty_flip_buffer_push(tty);
+	tty_kref_put(tty);
+}
+
+static void opticon_process_status_packet(struct usb_serial_port *port,
+					const unsigned char *buf, size_t len)
+{
+	struct opticon_private *priv = usb_get_serial_port_data(port);
 	unsigned long flags;
 
-	switch (status) {
-	case 0:
-		/* success */
-		break;
-	case -ECONNRESET:
-	case -ENOENT:
-	case -ESHUTDOWN:
-		/* this urb is terminated, clean up */
-		dev_dbg(&priv->udev->dev, "%s - urb shutting down with status: %d\n",
-			__func__, status);
+	spin_lock_irqsave(&priv->lock, flags);
+	if (buf[0] == 0x00)
+		priv->cts = false;
+	else
+		priv->cts = true;
+	spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+static void opticon_process_read_urb(struct urb *urb)
+{
+	struct usb_serial_port *port = urb->context;
+	const unsigned char *hdr = urb->transfer_buffer;
+	const unsigned char *data = hdr + 2;
+	size_t data_len = urb->actual_length - 2;
+
+	if (urb->actual_length <= 2) {
+		dev_dbg(&port->dev, "malformed packet received: %d bytes\n",
+							urb->actual_length);
 		return;
-	default:
-		dev_dbg(&priv->udev->dev, "%s - nonzero urb status received: %d\n",
-			__func__, status);
-		goto exit;
 	}
-
-	usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
-
-	if (urb->actual_length > 2) {
-		data_length = urb->actual_length - 2;
-
-		/*
-		 * Data from the device comes with a 2 byte header:
-		 *
-		 * <0x00><0x00>data...
-		 *	This is real data to be sent to the tty layer
-		 * <0x00><0x01)level
-		 *	This is a CTS level change, the third byte is the CTS
-		 *	value (0 for low, 1 for high).
-		 */
-		if ((data[0] == 0x00) && (data[1] == 0x00)) {
-			/* real data, send it to the tty layer */
-			tty = tty_port_tty_get(&port->port);
-			if (tty) {
-				tty_insert_flip_string(tty, data + 2,
-						       data_length);
-				tty_flip_buffer_push(tty);
-				tty_kref_put(tty);
-			}
-		} else {
-			if ((data[0] == 0x00) && (data[1] == 0x01)) {
-				spin_lock_irqsave(&priv->lock, flags);
-				/* CTS status information package */
-				if (data[2] == 0x00)
-					priv->cts = false;
-				else
-					priv->cts = true;
-				spin_unlock_irqrestore(&priv->lock, flags);
-			} else {
-				dev_dbg(&priv->udev->dev,
-					"Unknown data packet received from the device:"
-					" %2x %2x\n",
-					data[0], data[1]);
-			}
-		}
+	/*
+	 * Data from the device comes with a 2 byte header:
+	 *
+	 * <0x00><0x00>data...
+	 *      This is real data to be sent to the tty layer
+	 * <0x00><0x01>level
+	 *      This is a CTS level change, the third byte is the CTS
+	 *      value (0 for low, 1 for high).
+	 */
+	if ((hdr[0] == 0x00) && (hdr[1] == 0x00)) {
+		opticon_process_data_packet(port, data, data_len);
+	} else if ((hdr[0] == 0x00) && (hdr[1] == 0x01)) {
+		opticon_process_status_packet(port, data, data_len);
 	} else {
-		dev_dbg(&priv->udev->dev,
-			"Improper amount of data received from the device, "
-			"%d bytes", urb->actual_length);
+		dev_dbg(&port->dev, "unknown packet received: %02x %02x\n",
+							hdr[0], hdr[1]);
 	}
-
-exit:
-	spin_lock(&priv->lock);
-
-	/* Continue trying to always read if we should */
-	if (!priv->throttled) {
-		usb_fill_bulk_urb(priv->bulk_read_urb, priv->udev,
-				  usb_rcvbulkpipe(priv->udev,
-						  priv->bulk_address),
-				  priv->bulk_in_buffer, priv->buffer_size,
-				  opticon_read_bulk_callback, priv);
-		result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC);
-		if (result)
-			dev_err(&port->dev,
-			    "%s - failed resubmitting read urb, error %d\n",
-							__func__, result);
-	} else
-		priv->actually_throttled = true;
-	spin_unlock(&priv->lock);
 }
 
 static int send_control_msg(struct usb_serial_port *port, u8 requesttype,
@@ -175,52 +132,35 @@ static int send_control_msg(struct usb_serial_port *port, u8 requesttype,
 
 static int opticon_open(struct tty_struct *tty, struct usb_serial_port *port)
 {
-	struct opticon_private *priv = usb_get_serial_data(port->serial);
+	struct opticon_private *priv = usb_get_serial_port_data(port);
 	unsigned long flags;
-	int result = 0;
+	int res;
 
 	spin_lock_irqsave(&priv->lock, flags);
-	priv->throttled = false;
-	priv->actually_throttled = false;
-	priv->port = port;
 	priv->rts = false;
 	spin_unlock_irqrestore(&priv->lock, flags);
 
 	/* Clear RTS line */
 	send_control_msg(port, CONTROL_RTS, 0);
 
-	/* Setup the read URB and start reading from the device */
-	usb_fill_bulk_urb(priv->bulk_read_urb, priv->udev,
-			  usb_rcvbulkpipe(priv->udev,
-					  priv->bulk_address),
-			  priv->bulk_in_buffer, priv->buffer_size,
-			  opticon_read_bulk_callback, priv);
-
 	/* clear the halt status of the enpoint */
-	usb_clear_halt(priv->udev, priv->bulk_read_urb->pipe);
+	usb_clear_halt(port->serial->dev, port->read_urb->pipe);
+
+	res = usb_serial_generic_open(tty, port);
+	if (!res)
+		return res;
 
-	result = usb_submit_urb(priv->bulk_read_urb, GFP_KERNEL);
-	if (result)
-		dev_err(&port->dev,
-			"%s - failed resubmitting read urb, error %d\n",
-			__func__, result);
 	/* Request CTS line state, sometimes during opening the current
 	 * CTS state can be missed. */
 	send_control_msg(port, RESEND_CTS_STATE, 1);
-	return result;
-}
-
-static void opticon_close(struct usb_serial_port *port)
-{
-	struct opticon_private *priv = usb_get_serial_data(port->serial);
 
-	/* shutdown our urbs */
-	usb_kill_urb(priv->bulk_read_urb);
+	return res;
 }
 
 static void opticon_write_control_callback(struct urb *urb)
 {
-	struct opticon_private *priv = urb->context;
+	struct usb_serial_port *port = urb->context;
+	struct opticon_private *priv = usb_get_serial_port_data(port);
 	int status = urb->status;
 	unsigned long flags;
 
@@ -231,20 +171,21 @@ static void opticon_write_control_callback(struct urb *urb)
 	kfree(urb->setup_packet);
 
 	if (status)
-		dev_dbg(&priv->udev->dev, "%s - nonzero write bulk status received: %d\n",
+		dev_dbg(&port->dev,
+			"%s - non-zero urb status received: %d\n",
 			__func__, status);
 
 	spin_lock_irqsave(&priv->lock, flags);
 	--priv->outstanding_urbs;
 	spin_unlock_irqrestore(&priv->lock, flags);
 
-	usb_serial_port_softint(priv->port);
+	usb_serial_port_softint(port);
 }
 
 static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port,
 			 const unsigned char *buf, int count)
 {
-	struct opticon_private *priv = usb_get_serial_data(port->serial);
+	struct opticon_private *priv = usb_get_serial_port_data(port);
 	struct usb_serial *serial = port->serial;
 	struct urb *urb;
 	unsigned char *buffer;
@@ -298,7 +239,7 @@ static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port,
 	usb_fill_control_urb(urb, serial->dev,
 		usb_sndctrlpipe(serial->dev, 0),
 		(unsigned char *)dr, buffer, count,
-		opticon_write_control_callback, priv);
+		opticon_write_control_callback, port);
 
 	/* send it down the pipe */
 	status = usb_submit_urb(urb, GFP_ATOMIC);
@@ -331,7 +272,7 @@ error_no_buffer:
 static int opticon_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
-	struct opticon_private *priv = usb_get_serial_data(port->serial);
+	struct opticon_private *priv = usb_get_serial_port_data(port);
 	unsigned long flags;
 
 	/*
@@ -350,44 +291,10 @@ static int opticon_write_room(struct tty_struct *tty)
 	return 2048;
 }
 
-static void opticon_throttle(struct tty_struct *tty)
-{
-	struct usb_serial_port *port = tty->driver_data;
-	struct opticon_private *priv = usb_get_serial_data(port->serial);
-	unsigned long flags;
-
-	spin_lock_irqsave(&priv->lock, flags);
-	priv->throttled = true;
-	spin_unlock_irqrestore(&priv->lock, flags);
-}
-
-
-static void opticon_unthrottle(struct tty_struct *tty)
-{
-	struct usb_serial_port *port = tty->driver_data;
-	struct opticon_private *priv = usb_get_serial_data(port->serial);
-	unsigned long flags;
-	int result, was_throttled;
-
-	spin_lock_irqsave(&priv->lock, flags);
-	priv->throttled = false;
-	was_throttled = priv->actually_throttled;
-	priv->actually_throttled = false;
-	spin_unlock_irqrestore(&priv->lock, flags);
-
-	if (was_throttled) {
-		result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC);
-		if (result)
-			dev_err(&port->dev,
-				"%s - failed submitting read urb, error %d\n",
-							__func__, result);
-	}
-}
-
 static int opticon_tiocmget(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
-	struct opticon_private *priv = usb_get_serial_data(port->serial);
+	struct opticon_private *priv = usb_get_serial_port_data(port);
 	unsigned long flags;
 	int result = 0;
 
@@ -407,7 +314,7 @@ static int opticon_tiocmset(struct tty_struct *tty,
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct usb_serial *serial = port->serial;
-	struct opticon_private *priv = usb_get_serial_data(port->serial);
+	struct opticon_private *priv = usb_get_serial_port_data(port);
 	unsigned long flags;
 	bool rts;
 	bool changed = false;
@@ -438,7 +345,7 @@ static int opticon_tiocmset(struct tty_struct *tty,
 	return ret;
 }
 
-static int get_serial_info(struct opticon_private *priv,
+static int get_serial_info(struct usb_serial_port *port,
 			   struct serial_struct __user *serial)
 {
 	struct serial_struct tmp;
@@ -450,7 +357,7 @@ static int get_serial_info(struct opticon_private *priv,
 
 	/* fake emulate a 16550 uart to make userspace code happy */
 	tmp.type		= PORT_16550A;
-	tmp.line		= priv->serial->minor;
+	tmp.line		= port->serial->minor;
 	tmp.port		= 0;
 	tmp.irq			= 0;
 	tmp.flags		= ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
@@ -468,13 +375,12 @@ static int opticon_ioctl(struct tty_struct *tty,
 			 unsigned int cmd, unsigned long arg)
 {
 	struct usb_serial_port *port = tty->driver_data;
-	struct opticon_private *priv = usb_get_serial_data(port->serial);
 
 	dev_dbg(&port->dev, "%s - port %d, cmd = 0x%x\n", __func__, port->number, cmd);
 
 	switch (cmd) {
 	case TIOCGSERIAL:
-		return get_serial_info(priv,
+		return get_serial_info(port,
 				       (struct serial_struct __user *)arg);
 	}
 
@@ -483,106 +389,36 @@ static int opticon_ioctl(struct tty_struct *tty,
 
 static int opticon_startup(struct usb_serial *serial)
 {
-	struct opticon_private *priv;
-	struct usb_host_interface *intf;
-	int i;
-	int retval = -ENOMEM;
-	bool bulk_in_found = false;
-
-	/* create our private serial structure */
-	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
-	if (priv == NULL) {
-		dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
-		return -ENOMEM;
-	}
-	spin_lock_init(&priv->lock);
-	priv->serial = serial;
-	priv->port = serial->port[0];
-	priv->udev = serial->dev;
-	priv->outstanding_urbs = 0;	/* Init the outstanding urbs */
-
-	/* find our bulk endpoint */
-	intf = serial->interface->altsetting;
-	for (i = 0; i < intf->desc.bNumEndpoints; ++i) {
-		struct usb_endpoint_descriptor *endpoint;
-
-		endpoint = &intf->endpoint[i].desc;
-		if (!usb_endpoint_is_bulk_in(endpoint))
-			continue;
-
-		priv->bulk_read_urb = usb_alloc_urb(0, GFP_KERNEL);
-		if (!priv->bulk_read_urb) {
-			dev_err(&priv->udev->dev, "out of memory\n");
-			goto error;
-		}
-
-		priv->buffer_size = usb_endpoint_maxp(endpoint) * 2;
-		priv->bulk_in_buffer = kmalloc(priv->buffer_size, GFP_KERNEL);
-		if (!priv->bulk_in_buffer) {
-			dev_err(&priv->udev->dev, "out of memory\n");
-			goto error;
-		}
-
-		priv->bulk_address = endpoint->bEndpointAddress;
-
-		bulk_in_found = true;
-		break;
-		}
-
-	if (!bulk_in_found) {
-		dev_err(&priv->udev->dev,
-			"Error - the proper endpoints were not found!\n");
-		goto error;
+	if (!serial->num_bulk_in) {
+		dev_err(&serial->dev->dev, "no bulk in endpoint\n");
+		return -ENODEV;
 	}
 
-	usb_set_serial_data(serial, priv);
 	return 0;
-
-error:
-	usb_free_urb(priv->bulk_read_urb);
-	kfree(priv->bulk_in_buffer);
-	kfree(priv);
-	return retval;
 }
 
-static void opticon_disconnect(struct usb_serial *serial)
+static int opticon_port_probe(struct usb_serial_port *port)
 {
-	struct opticon_private *priv = usb_get_serial_data(serial);
-
-	usb_kill_urb(priv->bulk_read_urb);
-	usb_free_urb(priv->bulk_read_urb);
-}
+	struct opticon_private *priv;
 
-static void opticon_release(struct usb_serial *serial)
-{
-	struct opticon_private *priv = usb_get_serial_data(serial);
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
 
-	kfree(priv->bulk_in_buffer);
-	kfree(priv);
-}
+	spin_lock_init(&priv->lock);
 
-static int opticon_suspend(struct usb_serial *serial, pm_message_t message)
-{
-	struct opticon_private *priv = usb_get_serial_data(serial);
+	usb_set_serial_port_data(port, priv);
 
-	usb_kill_urb(priv->bulk_read_urb);
 	return 0;
 }
 
-static int opticon_resume(struct usb_serial *serial)
+static int opticon_port_remove(struct usb_serial_port *port)
 {
-	struct opticon_private *priv = usb_get_serial_data(serial);
-	struct usb_serial_port *port = serial->port[0];
-	int result;
-
-	mutex_lock(&port->port.mutex);
-	/* This is protected by the port mutex against close/open */
-	if (test_bit(ASYNCB_INITIALIZED, &port->port.flags))
-		result = usb_submit_urb(priv->bulk_read_urb, GFP_NOIO);
-	else
-		result = 0;
-	mutex_unlock(&port->port.mutex);
-	return result;
+	struct opticon_private *priv = usb_get_serial_port_data(port);
+
+	kfree(priv);
+
+	return 0;
 }
 
 static struct usb_serial_driver opticon_device = {
@@ -592,20 +428,19 @@ static struct usb_serial_driver opticon_device = {
 	},
 	.id_table =		id_table,
 	.num_ports =		1,
+	.bulk_in_size =		256,
 	.attach =		opticon_startup,
+	.port_probe =		opticon_port_probe,
+	.port_remove =		opticon_port_remove,
 	.open =			opticon_open,
-	.close =		opticon_close,
 	.write =		opticon_write,
 	.write_room = 		opticon_write_room,
-	.disconnect =		opticon_disconnect,
-	.release =		opticon_release,
-	.throttle = 		opticon_throttle,
-	.unthrottle =		opticon_unthrottle,
+	.throttle =		usb_serial_generic_throttle,
+	.unthrottle =		usb_serial_generic_unthrottle,
 	.ioctl =		opticon_ioctl,
 	.tiocmget =		opticon_tiocmget,
 	.tiocmset =		opticon_tiocmset,
-	.suspend = 		opticon_suspend,
-	.resume =		opticon_resume,
+	.process_read_urb =	opticon_process_read_urb,
 };
 
 static struct usb_serial_driver * const serial_drivers[] = {