V4L/DVB (10197): uvcvideo: Whitespace and comments cleanup, copyright updates.

Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

8 files changed, 184 insertions, 178 deletions

diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c
index c506068bec61..d2576f6391c0 100644
--- a/drivers/media/video/uvc/uvc_ctrl.c
+++ b/drivers/media/video/uvc/uvc_ctrl.c
@@ -1,7 +1,7 @@
 /*
  *      uvc_ctrl.c  --  USB Video Class driver - Controls
  *
- *      Copyright (C) 2005-2008
+ *      Copyright (C) 2005-2009
  *          Laurent Pinchart (laurent.pinchart@skynet.be)
  *
  *      This program is free software; you can redistribute it and/or modify
@@ -28,7 +28,7 @@
 #define UVC_CTRL_DATA_BACKUP	1
 
 /* ------------------------------------------------------------------------
- * Control, formats, ...
+ * Controls
  */
 
 static struct uvc_control_info uvc_ctrls[] = {
@@ -634,7 +634,7 @@ static __s32 uvc_get_le_value(struct uvc_control_mapping *mapping,
 		mask = (1 << bits) - 1;
 	}
 
-	/* Sign-extend the value if needed */
+	/* Sign-extend the value if needed. */
 	if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED)
 		value |= -(value & (1 << (mapping->size - 1)));
 
diff --git a/drivers/media/video/uvc/uvc_driver.c b/drivers/media/video/uvc/uvc_driver.c
index a0537464987e..20c16c4a62d1 100644
--- a/drivers/media/video/uvc/uvc_driver.c
+++ b/drivers/media/video/uvc/uvc_driver.c
@@ -1,7 +1,7 @@
 /*
  *      uvc_driver.c  --  USB Video Class driver
  *
- *      Copyright (C) 2005-2008
+ *      Copyright (C) 2005-2009
  *          Laurent Pinchart (laurent.pinchart@skynet.be)
  *
  *      This program is free software; you can redistribute it and/or modify
@@ -48,7 +48,7 @@ static unsigned int uvc_quirks_param;
 unsigned int uvc_trace_param;
 
 /* ------------------------------------------------------------------------
- * Control, formats, ...
+ * Video formats
  */
 
 static struct uvc_format_desc uvc_fmts[] = {
@@ -473,7 +473,7 @@ static int uvc_parse_format(struct uvc_device *dev,
 
 		/* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
 		 * completely. Observed behaviours range from setting the
-		 * value to 1.1x the actual frame size of hardwiring the
+		 * value to 1.1x the actual frame size to hardwiring the
 		 * 16 low bits to 0. This results in a higher than necessary
 		 * memory usage as well as a wrong image size information. For
 		 * uncompressed formats this can be fixed by computing the
@@ -486,7 +486,7 @@ static int uvc_parse_format(struct uvc_device *dev,
 		/* Some bogus devices report dwMinFrameInterval equal to
 		 * dwMaxFrameInterval and have dwFrameIntervalStep set to
 		 * zero. Setting all null intervals to 1 fixes the problem and
-		 * some other divisions by zero which could happen.
+		 * some other divisions by zero that could happen.
 		 */
 		for (i = 0; i < n; ++i) {
 			interval = get_unaligned_le32(&buffer[26+4*i]);
@@ -1199,13 +1199,13 @@ static void uvc_unregister_video(struct uvc_device *dev)
  * Scan the UVC descriptors to locate a chain starting at an Output Terminal
  * and containing the following units:
  *
- * - a USB Streaming Output Terminal
+ * - one Output Terminal (USB Streaming or Display)
  * - zero or one Processing Unit
  * - zero, one or mode single-input Selector Units
  * - zero or one multiple-input Selector Units, provided all inputs are
  *   connected to input terminals
  * - zero, one or mode single-input Extension Units
- * - one Camera Input Terminal, or one or more External terminals.
+ * - one or more Input Terminals (Camera, External or USB Streaming)
  *
  * A side forward scan is made on each detected entity to check for additional
  * extension units.
@@ -1530,10 +1530,6 @@ static int uvc_register_video(struct uvc_device *dev)
 
 	/* Set the driver data before calling video_register_device, otherwise
 	 * uvc_v4l2_open might race us.
-	 *
-	 * FIXME: usb_set_intfdata hasn't been called so far. Is that a
-	 * 	  problem ? Does any function which could be called here get
-	 * 	  a pointer to the usb_interface ?
 	 */
 	dev->video.vdev = vdev;
 	video_set_drvdata(vdev, &dev->video);
@@ -1568,7 +1564,7 @@ void uvc_delete(struct kref *kref)
 	struct uvc_device *dev = container_of(kref, struct uvc_device, kref);
 	struct list_head *p, *n;
 
-	/* Unregister the video device */
+	/* Unregister the video device. */
 	uvc_unregister_video(dev);
 	usb_put_intf(dev->intf);
 	usb_put_dev(dev->udev);
@@ -1611,7 +1607,7 @@ static int uvc_probe(struct usb_interface *intf,
 		uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
 				udev->devpath);
 
-	/* Allocate memory for the device and initialize it */
+	/* Allocate memory for the device and initialize it. */
 	if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL)
 		return -ENOMEM;
 
@@ -1632,7 +1628,7 @@ static int uvc_probe(struct usb_interface *intf,
 			le16_to_cpu(udev->descriptor.idVendor),
 			le16_to_cpu(udev->descriptor.idProduct));
 
-	/* Parse the Video Class control descriptor */
+	/* Parse the Video Class control descriptor. */
 	if (uvc_parse_control(dev) < 0) {
 		uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
 			"descriptors.\n");
@@ -1652,18 +1648,18 @@ static int uvc_probe(struct usb_interface *intf,
 			"linux-uvc-devel mailing list.\n");
 	}
 
-	/* Initialize controls */
+	/* Initialize controls. */
 	if (uvc_ctrl_init_device(dev) < 0)
 		goto error;
 
-	/* Register the video devices */
+	/* Register the video devices. */
 	if (uvc_register_video(dev) < 0)
 		goto error;
 
-	/* Save our data pointer in the interface data */
+	/* Save our data pointer in the interface data. */
 	usb_set_intfdata(intf, dev);
 
-	/* Initialize the interrupt URB */
+	/* Initialize the interrupt URB. */
 	if ((ret = uvc_status_init(dev)) < 0) {
 		uvc_printk(KERN_INFO, "Unable to initialize the status "
 			"endpoint (%d), status interrupt will not be "
@@ -1838,24 +1834,24 @@ static struct usb_device_id uvc_ids[] = {
 	  .bInterfaceSubClass	= 1,
 	  .bInterfaceProtocol	= 0 },
 	/* Apple Built-In iSight */
-	{ .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
+	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE
 				| USB_DEVICE_ID_MATCH_INT_INFO,
 	  .idVendor		= 0x05ac,
 	  .idProduct		= 0x8501,
-	  .bInterfaceClass      = USB_CLASS_VIDEO,
-	  .bInterfaceSubClass   = 1,
-	  .bInterfaceProtocol   = 0,
+	  .bInterfaceClass	= USB_CLASS_VIDEO,
+	  .bInterfaceSubClass	= 1,
+	  .bInterfaceProtocol	= 0,
 	  .driver_info 		= UVC_QUIRK_PROBE_MINMAX
 				| UVC_QUIRK_BUILTIN_ISIGHT },
 	/* Genesys Logic USB 2.0 PC Camera */
-	{ .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
+	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE
 				| USB_DEVICE_ID_MATCH_INT_INFO,
-	  .idVendor             = 0x05e3,
-	  .idProduct            = 0x0505,
-	  .bInterfaceClass      = USB_CLASS_VIDEO,
-	  .bInterfaceSubClass   = 1,
-	  .bInterfaceProtocol   = 0,
-	  .driver_info          = UVC_QUIRK_STREAM_NO_FID },
+	  .idVendor		= 0x05e3,
+	  .idProduct		= 0x0505,
+	  .bInterfaceClass	= USB_CLASS_VIDEO,
+	  .bInterfaceSubClass	= 1,
+	  .bInterfaceProtocol	= 0,
+	  .driver_info		= UVC_QUIRK_STREAM_NO_FID },
 	/* MT6227 */
 	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE
 				| USB_DEVICE_ID_MATCH_INT_INFO,
diff --git a/drivers/media/video/uvc/uvc_isight.c b/drivers/media/video/uvc/uvc_isight.c
index 37bdefdbead5..436f462685a0 100644
--- a/drivers/media/video/uvc/uvc_isight.c
+++ b/drivers/media/video/uvc/uvc_isight.c
@@ -3,6 +3,8 @@
  *
  *	Copyright (C) 2006-2007
  *		Ivan N. Zlatev <contact@i-nz.net>
+ *	Copyright (C) 2008-2009
+ *		Laurent Pinchart <laurent.pinchart@skynet.be>
  *
  *      This program is free software; you can redistribute it and/or modify
  *      it under the terms of the GNU General Public License as published by
diff --git a/drivers/media/video/uvc/uvc_queue.c b/drivers/media/video/uvc/uvc_queue.c
index 8f676f9d9e39..0155752e4a5a 100644
--- a/drivers/media/video/uvc/uvc_queue.c
+++ b/drivers/media/video/uvc/uvc_queue.c
@@ -1,7 +1,7 @@
 /*
  *      uvc_queue.c  --  USB Video Class driver - Buffers management
  *
- *      Copyright (C) 2005-2008
+ *      Copyright (C) 2005-2009
  *          Laurent Pinchart (laurent.pinchart@skynet.be)
  *
  *      This program is free software; you can redistribute it and/or modify
@@ -36,22 +36,22 @@
  * to user space will return -EBUSY.
  *
  * Video buffers are managed using two queues. However, unlike most USB video
- * drivers which use an in queue and an out queue, we use a main queue which
- * holds all queued buffers (both 'empty' and 'done' buffers), and an irq
- * queue which holds empty buffers. This design (copied from video-buf)
- * minimizes locking in interrupt, as only one queue is shared between
- * interrupt and user contexts.
+ * drivers that use an in queue and an out queue, we use a main queue to hold
+ * all queued buffers (both 'empty' and 'done' buffers), and an irq queue to
+ * hold empty buffers. This design (copied from video-buf) minimizes locking
+ * in interrupt, as only one queue is shared between interrupt and user
+ * contexts.
  *
  * Use cases
  * ---------
  *
- * Unless stated otherwise, all operations which modify the irq buffers queue
+ * Unless stated otherwise, all operations that modify the irq buffers queue
  * are protected by the irq spinlock.
  *
  * 1. The user queues the buffers, starts streaming and dequeues a buffer.
  *
  *    The buffers are added to the main and irq queues. Both operations are
- *    protected by the queue lock, and the latert is protected by the irq
+ *    protected by the queue lock, and the later is protected by the irq
  *    spinlock as well.
  *
  *    The completion handler fetches a buffer from the irq queue and fills it
@@ -59,7 +59,7 @@
  *    returns immediately.
  *
  *    When the buffer is full, the completion handler removes it from the irq
- *    queue, marks it as ready (UVC_BUF_STATE_DONE) and wake its wait queue.
+ *    queue, marks it as ready (UVC_BUF_STATE_DONE) and wakes its wait queue.
  *    At that point, any process waiting on the buffer will be woken up. If a
  *    process tries to dequeue a buffer after it has been marked ready, the
  *    dequeing will succeed immediately.
@@ -90,8 +90,8 @@ void uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type)
 /*
  * Allocate the video buffers.
  *
- * Pages are reserved to make sure they will not be swaped, as they will be
- * filled in URB completion handler.
+ * Pages are reserved to make sure they will not be swapped, as they will be
+ * filled in the URB completion handler.
  *
  * Buffers will be individually mapped, so they must all be page aligned.
  */
@@ -209,8 +209,8 @@ int uvc_query_buffer(struct uvc_video_queue *queue,
 	__uvc_query_buffer(&queue->buffer[v4l2_buf->index], v4l2_buf);
 
 done:
-       mutex_unlock(&queue->mutex);
-       return ret;
+	mutex_unlock(&queue->mutex);
+	return ret;
 }
 
 /*
@@ -235,7 +235,7 @@ int uvc_queue_buffer(struct uvc_video_queue *queue,
 	}
 
 	mutex_lock(&queue->mutex);
-	if (v4l2_buf->index >= queue->count)  {
+	if (v4l2_buf->index >= queue->count) {
 		uvc_trace(UVC_TRACE_CAPTURE, "[E] Out of range index.\n");
 		ret = -EINVAL;
 		goto done;
@@ -428,7 +428,7 @@ done:
  * Cancel the video buffers queue.
  *
  * Cancelling the queue marks all buffers on the irq queue as erroneous,
- * wakes them up and remove them from the queue.
+ * wakes them up and removes them from the queue.
  *
  * If the disconnect parameter is set, further calls to uvc_queue_buffer will
  * fail with -ENODEV.
diff --git a/drivers/media/video/uvc/uvc_status.c b/drivers/media/video/uvc/uvc_status.c
index b482f4fc7b31..c1e4ae27c613 100644
--- a/drivers/media/video/uvc/uvc_status.c
+++ b/drivers/media/video/uvc/uvc_status.c
@@ -1,7 +1,7 @@
 /*
  *      uvc_status.c  --  USB Video Class driver - Status endpoint
  *
- *      Copyright (C) 2007-2008
+ *      Copyright (C) 2007-2009
  *          Laurent Pinchart (laurent.pinchart@skynet.be)
  *
  *      This program is free software; you can redistribute it and/or modify
diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c
index fa150fff2c10..d681519d0c8a 100644
--- a/drivers/media/video/uvc/uvc_v4l2.c
+++ b/drivers/media/video/uvc/uvc_v4l2.c
@@ -1,7 +1,7 @@
 /*
  *      uvc_v4l2.c  --  USB Video Class driver - V4L2 API
  *
- *      Copyright (C) 2005-2008
+ *      Copyright (C) 2005-2009
  *          Laurent Pinchart (laurent.pinchart@skynet.be)
  *
  *      This program is free software; you can redistribute it and/or modify
@@ -37,7 +37,7 @@
  * must be grouped (for instance the Red Balance, Blue Balance and Do White
  * Balance V4L2 controls use the White Balance Component UVC control) or
  * otherwise translated. The approach we take here is to use a translation
- * table for the controls which can be mapped directly, and handle the others
+ * table for the controls that can be mapped directly, and handle the others
  * manually.
  */
 static int uvc_v4l2_query_menu(struct uvc_video_device *video,
@@ -189,7 +189,7 @@ static int uvc_v4l2_try_format(struct uvc_video_device *video,
 		probe->dwMaxVideoFrameSize =
 			video->streaming->ctrl.dwMaxVideoFrameSize;
 
-	/* Probe the device */
+	/* Probe the device. */
 	if ((ret = uvc_probe_video(video, probe)) < 0)
 		goto done;
 
@@ -354,11 +354,11 @@ static int uvc_v4l2_set_streamparm(struct uvc_video_device *video,
  *
  * Each open instance of a UVC device can either be in a privileged or
  * unprivileged state. Only a single instance can be in a privileged state at
- * a given time. Trying to perform an operation which requires privileges will
+ * a given time. Trying to perform an operation that requires privileges will
  * automatically acquire the required privileges if possible, or return -EBUSY
  * otherwise. Privileges are dismissed when closing the instance.
  *
- * Operations which require privileges are:
+ * Operations that require privileges are:
  *
  * - VIDIOC_S_INPUT
  * - VIDIOC_S_PARM
diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c
index 6e9e30f174a1..f9eb0e974051 100644
--- a/drivers/media/video/uvc/uvc_video.c
+++ b/drivers/media/video/uvc/uvc_video.c
@@ -1,7 +1,7 @@
 /*
  *      uvc_video.c  --  USB Video Class driver - Video handling
  *
- *      Copyright (C) 2005-2008
+ *      Copyright (C) 2005-2009
  *          Laurent Pinchart (laurent.pinchart@skynet.be)
  *
  *      This program is free software; you can redistribute it and/or modify
@@ -159,7 +159,7 @@ static int uvc_get_video_ctrl(struct uvc_video_device *video,
 	}
 
 	/* Some broken devices return a null or wrong dwMaxVideoFrameSize.
-	 * Try to get the value from the format and frame descriptor.
+	 * Try to get the value from the format and frame descriptors.
 	 */
 	uvc_fixup_buffer_size(video, ctrl);
 	ret = 0;
@@ -190,9 +190,6 @@ static int uvc_set_video_ctrl(struct uvc_video_device *video,
 	*(__le16 *)&data[12] = cpu_to_le16(ctrl->wCompQuality);
 	*(__le16 *)&data[14] = cpu_to_le16(ctrl->wCompWindowSize);
 	*(__le16 *)&data[16] = cpu_to_le16(ctrl->wDelay);
-	/* Note: Some of the fields below are not required for IN devices (see
-	 * UVC spec, 4.3.1.1), but we still copy them in case support for OUT
-	 * devices is added in the future. */
 	put_unaligned_le32(ctrl->dwMaxVideoFrameSize, &data[18]);
 	put_unaligned_le32(ctrl->dwMaxPayloadTransferSize, &data[22]);
 
@@ -399,7 +396,7 @@ static int uvc_video_decode_start(struct uvc_video_device *video,
 	 *
 	 * Empty buffers (bytesused == 0) don't trigger end of frame detection
 	 * as it doesn't make sense to return an empty buffer. This also
-	 * avoids detecting and of frame conditions at FID toggling if the
+	 * avoids detecting end of frame conditions at FID toggling if the
 	 * previous payload had the EOF bit set.
 	 */
 	if (fid != video->last_fid && buf->buf.bytesused != 0) {
@@ -452,6 +449,17 @@ static void uvc_video_decode_end(struct uvc_video_device *video,
 	}
 }
 
+/* Video payload encoding is handled by uvc_video_encode_header() and
+ * uvc_video_encode_data(). Only bulk transfers are currently supported.
+ *
+ * uvc_video_encode_header is called at the start of a payload. It adds header
+ * data to the transfer buffer and returns the header size. As the only known
+ * UVC output device transfers a whole frame in a single payload, the EOF bit
+ * is always set in the header.
+ *
+ * uvc_video_encode_data is called for every URB and copies the data from the
+ * video buffer to the transfer buffer.
+ */
 static int uvc_video_encode_header(struct uvc_video_device *video,
 		struct uvc_buffer *buf, __u8 *data, int len)
 {
@@ -952,7 +960,7 @@ int uvc_video_suspend(struct uvc_video_device *video)
 }
 
 /*
- * Reconfigure the video interface and restart streaming if it was enable
+ * Reconfigure the video interface and restart streaming if it was enabled
  * before suspend.
  *
  * If an error occurs, disable the video queue. This will wake all pending
@@ -984,8 +992,8 @@ int uvc_video_resume(struct uvc_video_device *video)
  */
 
 /*
- * Initialize the UVC video device by retrieving the default format and
- * committing it.
+ * Initialize the UVC video device by switching to alternate setting 0 and
+ * retrieve the default format.
  *
  * Some cameras (namely the Fuji Finepix) set the format and frame
  * indexes to zero. The UVC standard doesn't clearly make this a spec
@@ -1013,7 +1021,7 @@ int uvc_video_init(struct uvc_video_device *video)
 	 */
 	usb_set_interface(video->dev->udev, video->streaming->intfnum, 0);
 
-	/* Some webcams don't suport GET_DEF request on the probe control. We
+	/* Some webcams don't suport GET_DEF requests on the probe control. We
 	 * fall back to GET_CUR if GET_DEF fails.
 	 */
 	if ((ret = uvc_get_video_ctrl(video, probe, 1, GET_DEF)) < 0 &&
diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h
index bcf4361dc1bc..027947ea9b6e 100644
--- a/drivers/media/video/uvc/uvcvideo.h
+++ b/drivers/media/video/uvc/uvcvideo.h
@@ -72,149 +72,149 @@ struct uvc_xu_control {
  * UVC constants
  */
 
-#define SC_UNDEFINED                    0x00
-#define SC_VIDEOCONTROL                 0x01
-#define SC_VIDEOSTREAMING               0x02
-#define SC_VIDEO_INTERFACE_COLLECTION   0x03
+#define SC_UNDEFINED			0x00
+#define SC_VIDEOCONTROL			0x01
+#define SC_VIDEOSTREAMING		0x02
+#define SC_VIDEO_INTERFACE_COLLECTION	0x03
 
-#define PC_PROTOCOL_UNDEFINED           0x00
+#define PC_PROTOCOL_UNDEFINED		0x00
 
-#define CS_UNDEFINED                    0x20
-#define CS_DEVICE                       0x21
-#define CS_CONFIGURATION                0x22
-#define CS_STRING                       0x23
-#define CS_INTERFACE                    0x24
-#define CS_ENDPOINT                     0x25
+#define CS_UNDEFINED			0x20
+#define CS_DEVICE			0x21
+#define CS_CONFIGURATION		0x22
+#define CS_STRING			0x23
+#define CS_INTERFACE			0x24
+#define CS_ENDPOINT			0x25
 
 /* VideoControl class specific interface descriptor */
-#define VC_DESCRIPTOR_UNDEFINED         0x00
-#define VC_HEADER                       0x01
-#define VC_INPUT_TERMINAL               0x02
-#define VC_OUTPUT_TERMINAL              0x03
-#define VC_SELECTOR_UNIT                0x04
-#define VC_PROCESSING_UNIT              0x05
-#define VC_EXTENSION_UNIT               0x06
+#define VC_DESCRIPTOR_UNDEFINED		0x00
+#define VC_HEADER			0x01
+#define VC_INPUT_TERMINAL		0x02
+#define VC_OUTPUT_TERMINAL		0x03
+#define VC_SELECTOR_UNIT		0x04
+#define VC_PROCESSING_UNIT		0x05
+#define VC_EXTENSION_UNIT		0x06
 
 /* VideoStreaming class specific interface descriptor */
-#define VS_UNDEFINED                    0x00
-#define VS_INPUT_HEADER                 0x01
-#define VS_OUTPUT_HEADER                0x02
-#define VS_STILL_IMAGE_FRAME            0x03
-#define VS_FORMAT_UNCOMPRESSED          0x04
-#define VS_FRAME_UNCOMPRESSED           0x05
-#define VS_FORMAT_MJPEG                 0x06
-#define VS_FRAME_MJPEG                  0x07
-#define VS_FORMAT_MPEG2TS               0x0a
-#define VS_FORMAT_DV                    0x0c
-#define VS_COLORFORMAT                  0x0d
-#define VS_FORMAT_FRAME_BASED           0x10
-#define VS_FRAME_FRAME_BASED            0x11
-#define VS_FORMAT_STREAM_BASED          0x12
+#define VS_UNDEFINED			0x00
+#define VS_INPUT_HEADER			0x01
+#define VS_OUTPUT_HEADER		0x02
+#define VS_STILL_IMAGE_FRAME		0x03
+#define VS_FORMAT_UNCOMPRESSED		0x04
+#define VS_FRAME_UNCOMPRESSED		0x05
+#define VS_FORMAT_MJPEG			0x06
+#define VS_FRAME_MJPEG			0x07
+#define VS_FORMAT_MPEG2TS		0x0a
+#define VS_FORMAT_DV			0x0c
+#define VS_COLORFORMAT			0x0d
+#define VS_FORMAT_FRAME_BASED		0x10
+#define VS_FRAME_FRAME_BASED		0x11
+#define VS_FORMAT_STREAM_BASED		0x12
 
 /* Endpoint type */
-#define EP_UNDEFINED                    0x00
-#define EP_GENERAL                      0x01
-#define EP_ENDPOINT                     0x02
-#define EP_INTERRUPT                    0x03
+#define EP_UNDEFINED			0x00
+#define EP_GENERAL			0x01
+#define EP_ENDPOINT			0x02
+#define EP_INTERRUPT			0x03
 
 /* Request codes */
-#define RC_UNDEFINED                    0x00
-#define SET_CUR                         0x01
-#define GET_CUR                         0x81
-#define GET_MIN                         0x82
-#define GET_MAX                         0x83
-#define GET_RES                         0x84
-#define GET_LEN                         0x85
-#define GET_INFO                        0x86
-#define GET_DEF                         0x87
+#define RC_UNDEFINED			0x00
+#define SET_CUR				0x01
+#define GET_CUR				0x81
+#define GET_MIN				0x82
+#define GET_MAX				0x83
+#define GET_RES				0x84
+#define GET_LEN				0x85
+#define GET_INFO			0x86
+#define GET_DEF				0x87
 
 /* VideoControl interface controls */
-#define VC_CONTROL_UNDEFINED            0x00
-#define VC_VIDEO_POWER_MODE_CONTROL     0x01
-#define VC_REQUEST_ERROR_CODE_CONTROL   0x02
+#define VC_CONTROL_UNDEFINED		0x00
+#define VC_VIDEO_POWER_MODE_CONTROL	0x01
+#define VC_REQUEST_ERROR_CODE_CONTROL	0x02
 
 /* Terminal controls */
-#define TE_CONTROL_UNDEFINED            0x00
+#define TE_CONTROL_UNDEFINED		0x00
 
 /* Selector Unit controls */
-#define SU_CONTROL_UNDEFINED            0x00
-#define SU_INPUT_SELECT_CONTROL         0x01
+#define SU_CONTROL_UNDEFINED		0x00
+#define SU_INPUT_SELECT_CONTROL		0x01
 
 /* Camera Terminal controls */
-#define CT_CONTROL_UNDEFINED            		0x00
-#define CT_SCANNING_MODE_CONTROL        		0x01
-#define CT_AE_MODE_CONTROL              		0x02
-#define CT_AE_PRIORITY_CONTROL          		0x03
-#define CT_EXPOSURE_TIME_ABSOLUTE_CONTROL               0x04
-#define CT_EXPOSURE_TIME_RELATIVE_CONTROL               0x05
-#define CT_FOCUS_ABSOLUTE_CONTROL       		0x06
-#define CT_FOCUS_RELATIVE_CONTROL       		0x07
-#define CT_FOCUS_AUTO_CONTROL           		0x08
-#define CT_IRIS_ABSOLUTE_CONTROL        		0x09
-#define CT_IRIS_RELATIVE_CONTROL        		0x0a
-#define CT_ZOOM_ABSOLUTE_CONTROL        		0x0b
-#define CT_ZOOM_RELATIVE_CONTROL        		0x0c
-#define CT_PANTILT_ABSOLUTE_CONTROL     		0x0d
-#define CT_PANTILT_RELATIVE_CONTROL     		0x0e
-#define CT_ROLL_ABSOLUTE_CONTROL        		0x0f
-#define CT_ROLL_RELATIVE_CONTROL        		0x10
-#define CT_PRIVACY_CONTROL              		0x11
+#define CT_CONTROL_UNDEFINED				0x00
+#define CT_SCANNING_MODE_CONTROL			0x01
+#define CT_AE_MODE_CONTROL				0x02
+#define CT_AE_PRIORITY_CONTROL				0x03
+#define CT_EXPOSURE_TIME_ABSOLUTE_CONTROL		0x04
+#define CT_EXPOSURE_TIME_RELATIVE_CONTROL		0x05
+#define CT_FOCUS_ABSOLUTE_CONTROL			0x06
+#define CT_FOCUS_RELATIVE_CONTROL			0x07
+#define CT_FOCUS_AUTO_CONTROL				0x08
+#define CT_IRIS_ABSOLUTE_CONTROL			0x09
+#define CT_IRIS_RELATIVE_CONTROL			0x0a
+#define CT_ZOOM_ABSOLUTE_CONTROL			0x0b
+#define CT_ZOOM_RELATIVE_CONTROL			0x0c
+#define CT_PANTILT_ABSOLUTE_CONTROL			0x0d
+#define CT_PANTILT_RELATIVE_CONTROL			0x0e
+#define CT_ROLL_ABSOLUTE_CONTROL			0x0f
+#define CT_ROLL_RELATIVE_CONTROL			0x10
+#define CT_PRIVACY_CONTROL				0x11
 
 /* Processing Unit controls */
-#define PU_CONTROL_UNDEFINED            		0x00
-#define PU_BACKLIGHT_COMPENSATION_CONTROL               0x01
-#define PU_BRIGHTNESS_CONTROL           		0x02
-#define PU_CONTRAST_CONTROL             		0x03
-#define PU_GAIN_CONTROL                 		0x04
-#define PU_POWER_LINE_FREQUENCY_CONTROL 		0x05
-#define PU_HUE_CONTROL                  		0x06
-#define PU_SATURATION_CONTROL           		0x07
-#define PU_SHARPNESS_CONTROL            		0x08
-#define PU_GAMMA_CONTROL                		0x09
-#define PU_WHITE_BALANCE_TEMPERATURE_CONTROL            0x0a
-#define PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL       0x0b
-#define PU_WHITE_BALANCE_COMPONENT_CONTROL              0x0c
-#define PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL         0x0d
-#define PU_DIGITAL_MULTIPLIER_CONTROL   		0x0e
-#define PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL             0x0f
-#define PU_HUE_AUTO_CONTROL             		0x10
-#define PU_ANALOG_VIDEO_STANDARD_CONTROL                0x11
-#define PU_ANALOG_LOCK_STATUS_CONTROL   		0x12
+#define PU_CONTROL_UNDEFINED				0x00
+#define PU_BACKLIGHT_COMPENSATION_CONTROL		0x01
+#define PU_BRIGHTNESS_CONTROL				0x02
+#define PU_CONTRAST_CONTROL				0x03
+#define PU_GAIN_CONTROL					0x04
+#define PU_POWER_LINE_FREQUENCY_CONTROL			0x05
+#define PU_HUE_CONTROL					0x06
+#define PU_SATURATION_CONTROL				0x07
+#define PU_SHARPNESS_CONTROL				0x08
+#define PU_GAMMA_CONTROL				0x09
+#define PU_WHITE_BALANCE_TEMPERATURE_CONTROL		0x0a
+#define PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL	0x0b
+#define PU_WHITE_BALANCE_COMPONENT_CONTROL		0x0c
+#define PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL		0x0d
+#define PU_DIGITAL_MULTIPLIER_CONTROL			0x0e
+#define PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL		0x0f
+#define PU_HUE_AUTO_CONTROL				0x10
+#define PU_ANALOG_VIDEO_STANDARD_CONTROL		0x11
+#define PU_ANALOG_LOCK_STATUS_CONTROL			0x12
 
 #define LXU_MOTOR_PANTILT_RELATIVE_CONTROL		0x01
 #define LXU_MOTOR_PANTILT_RESET_CONTROL			0x02
 #define LXU_MOTOR_FOCUS_MOTOR_CONTROL			0x03
 
 /* VideoStreaming interface controls */
-#define VS_CONTROL_UNDEFINED            0x00
-#define VS_PROBE_CONTROL                0x01
-#define VS_COMMIT_CONTROL               0x02
-#define VS_STILL_PROBE_CONTROL          0x03
-#define VS_STILL_COMMIT_CONTROL         0x04
-#define VS_STILL_IMAGE_TRIGGER_CONTROL  0x05
-#define VS_STREAM_ERROR_CODE_CONTROL    0x06
-#define VS_GENERATE_KEY_FRAME_CONTROL   0x07
-#define VS_UPDATE_FRAME_SEGMENT_CONTROL 0x08
-#define VS_SYNC_DELAY_CONTROL           0x09
-
-#define TT_VENDOR_SPECIFIC              0x0100
-#define TT_STREAMING                    0x0101
+#define VS_CONTROL_UNDEFINED		0x00
+#define VS_PROBE_CONTROL		0x01
+#define VS_COMMIT_CONTROL		0x02
+#define VS_STILL_PROBE_CONTROL		0x03
+#define VS_STILL_COMMIT_CONTROL		0x04
+#define VS_STILL_IMAGE_TRIGGER_CONTROL	0x05
+#define VS_STREAM_ERROR_CODE_CONTROL	0x06
+#define VS_GENERATE_KEY_FRAME_CONTROL	0x07
+#define VS_UPDATE_FRAME_SEGMENT_CONTROL	0x08
+#define VS_SYNC_DELAY_CONTROL		0x09
+
+#define TT_VENDOR_SPECIFIC		0x0100
+#define TT_STREAMING			0x0101
 
 /* Input Terminal types */
-#define ITT_VENDOR_SPECIFIC             0x0200
-#define ITT_CAMERA                      0x0201
-#define ITT_MEDIA_TRANSPORT_INPUT       0x0202
+#define ITT_VENDOR_SPECIFIC		0x0200
+#define ITT_CAMERA			0x0201
+#define ITT_MEDIA_TRANSPORT_INPUT	0x0202
 
 /* Output Terminal types */
-#define OTT_VENDOR_SPECIFIC             0x0300
-#define OTT_DISPLAY                     0x0301
-#define OTT_MEDIA_TRANSPORT_OUTPUT      0x0302
+#define OTT_VENDOR_SPECIFIC		0x0300
+#define OTT_DISPLAY			0x0301
+#define OTT_MEDIA_TRANSPORT_OUTPUT	0x0302
 
 /* External Terminal types */
-#define EXTERNAL_VENDOR_SPECIFIC        0x0400
-#define COMPOSITE_CONNECTOR             0x0401
-#define SVIDEO_CONNECTOR                0x0402
-#define COMPONENT_CONNECTOR             0x0403
+#define EXTERNAL_VENDOR_SPECIFIC	0x0400
+#define COMPOSITE_CONNECTOR		0x0401
+#define SVIDEO_CONNECTOR		0x0402
+#define COMPONENT_CONNECTOR		0x0403
 
 #define UVC_TERM_INPUT			0x0000
 #define UVC_TERM_OUTPUT			0x8000
@@ -541,11 +541,11 @@ struct uvc_streaming {
 };
 
 enum uvc_buffer_state {
-	UVC_BUF_STATE_IDLE       = 0,
-	UVC_BUF_STATE_QUEUED     = 1,
-	UVC_BUF_STATE_ACTIVE     = 2,
-	UVC_BUF_STATE_DONE       = 3,
-	UVC_BUF_STATE_ERROR      = 4,
+	UVC_BUF_STATE_IDLE	= 0,
+	UVC_BUF_STATE_QUEUED	= 1,
+	UVC_BUF_STATE_ACTIVE	= 2,
+	UVC_BUF_STATE_DONE	= 3,
+	UVC_BUF_STATE_ERROR	= 4,
 };
 
 struct uvc_buffer {