usb: gadget: Gadget directory cleanup - group usb functions

The drivers/usb/gadget directory contains many files.
Files which are related can be distributed into separate directories.
This patch moves the USB functions implementations into a separate directory.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 0 insertions, 407 deletions

diff --git a/drivers/usb/gadget/uvc_queue.c b/drivers/usb/gadget/uvc_queue.c
deleted file mode 100644
index 1c29bc954db9..000000000000
--- a/drivers/usb/gadget/uvc_queue.c
+++ /dev/null
@@ -1,407 +0,0 @@
-/*
- *	uvc_queue.c  --  USB Video Class driver - Buffers management
- *
- *	Copyright (C) 2005-2010
- *	    Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- *	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
- *	the Free Software Foundation; either version 2 of the License, or
- *	(at your option) any later version.
- */
-
-#include <linux/atomic.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/usb.h>
-#include <linux/videodev2.h>
-#include <linux/vmalloc.h>
-#include <linux/wait.h>
-
-#include <media/v4l2-common.h>
-#include <media/videobuf2-vmalloc.h>
-
-#include "uvc.h"
-
-/* ------------------------------------------------------------------------
- * Video buffers queue management.
- *
- * Video queues is initialized by uvc_queue_init(). The function performs
- * basic initialization of the uvc_video_queue struct and never fails.
- *
- * Video buffers are managed by videobuf2. The driver uses a mutex to protect
- * the videobuf2 queue operations by serializing calls to videobuf2 and a
- * spinlock to protect the IRQ queue that holds the buffers to be processed by
- * the driver.
- */
-
-/* -----------------------------------------------------------------------------
- * videobuf2 queue operations
- */
-
-static int uvc_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
-			   unsigned int *nbuffers, unsigned int *nplanes,
-			   unsigned int sizes[], void *alloc_ctxs[])
-{
-	struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
-	struct uvc_video *video = container_of(queue, struct uvc_video, queue);
-
-	if (*nbuffers > UVC_MAX_VIDEO_BUFFERS)
-		*nbuffers = UVC_MAX_VIDEO_BUFFERS;
-
-	*nplanes = 1;
-
-	sizes[0] = video->imagesize;
-
-	return 0;
-}
-
-static int uvc_buffer_prepare(struct vb2_buffer *vb)
-{
-	struct uvc_video_queue *queue = vb2_get_drv_priv(vb->vb2_queue);
-	struct uvc_buffer *buf = container_of(vb, struct uvc_buffer, buf);
-
-	if (vb->v4l2_buf.type == V4L2_BUF_TYPE_VIDEO_OUTPUT &&
-	    vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0)) {
-		uvc_trace(UVC_TRACE_CAPTURE, "[E] Bytes used out of bounds.\n");
-		return -EINVAL;
-	}
-
-	if (unlikely(queue->flags & UVC_QUEUE_DISCONNECTED))
-		return -ENODEV;
-
-	buf->state = UVC_BUF_STATE_QUEUED;
-	buf->mem = vb2_plane_vaddr(vb, 0);
-	buf->length = vb2_plane_size(vb, 0);
-	if (vb->v4l2_buf.type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
-		buf->bytesused = 0;
-	else
-		buf->bytesused = vb2_get_plane_payload(vb, 0);
-
-	return 0;
-}
-
-static void uvc_buffer_queue(struct vb2_buffer *vb)
-{
-	struct uvc_video_queue *queue = vb2_get_drv_priv(vb->vb2_queue);
-	struct uvc_buffer *buf = container_of(vb, struct uvc_buffer, buf);
-	unsigned long flags;
-
-	spin_lock_irqsave(&queue->irqlock, flags);
-
-	if (likely(!(queue->flags & UVC_QUEUE_DISCONNECTED))) {
-		list_add_tail(&buf->queue, &queue->irqqueue);
-	} else {
-		/* If the device is disconnected return the buffer to userspace
-		 * directly. The next QBUF call will fail with -ENODEV.
-		 */
-		buf->state = UVC_BUF_STATE_ERROR;
-		vb2_buffer_done(&buf->buf, VB2_BUF_STATE_ERROR);
-	}
-
-	spin_unlock_irqrestore(&queue->irqlock, flags);
-}
-
-static void uvc_wait_prepare(struct vb2_queue *vq)
-{
-	struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
-
-	mutex_unlock(&queue->mutex);
-}
-
-static void uvc_wait_finish(struct vb2_queue *vq)
-{
-	struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
-
-	mutex_lock(&queue->mutex);
-}
-
-static struct vb2_ops uvc_queue_qops = {
-	.queue_setup = uvc_queue_setup,
-	.buf_prepare = uvc_buffer_prepare,
-	.buf_queue = uvc_buffer_queue,
-	.wait_prepare = uvc_wait_prepare,
-	.wait_finish = uvc_wait_finish,
-};
-
-static int uvc_queue_init(struct uvc_video_queue *queue,
-			  enum v4l2_buf_type type)
-{
-	int ret;
-
-	queue->queue.type = type;
-	queue->queue.io_modes = VB2_MMAP | VB2_USERPTR;
-	queue->queue.drv_priv = queue;
-	queue->queue.buf_struct_size = sizeof(struct uvc_buffer);
-	queue->queue.ops = &uvc_queue_qops;
-	queue->queue.mem_ops = &vb2_vmalloc_memops;
-	queue->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC
-				     | V4L2_BUF_FLAG_TSTAMP_SRC_EOF;
-	ret = vb2_queue_init(&queue->queue);
-	if (ret)
-		return ret;
-
-	mutex_init(&queue->mutex);
-	spin_lock_init(&queue->irqlock);
-	INIT_LIST_HEAD(&queue->irqqueue);
-	queue->flags = 0;
-
-	return 0;
-}
-
-/*
- * Free the video buffers.
- */
-static void uvc_free_buffers(struct uvc_video_queue *queue)
-{
-	mutex_lock(&queue->mutex);
-	vb2_queue_release(&queue->queue);
-	mutex_unlock(&queue->mutex);
-}
-
-/*
- * Allocate the video buffers.
- */
-static int uvc_alloc_buffers(struct uvc_video_queue *queue,
-			     struct v4l2_requestbuffers *rb)
-{
-	int ret;
-
-	mutex_lock(&queue->mutex);
-	ret = vb2_reqbufs(&queue->queue, rb);
-	mutex_unlock(&queue->mutex);
-
-	return ret ? ret : rb->count;
-}
-
-static int uvc_query_buffer(struct uvc_video_queue *queue,
-			    struct v4l2_buffer *buf)
-{
-	int ret;
-
-	mutex_lock(&queue->mutex);
-	ret = vb2_querybuf(&queue->queue, buf);
-	mutex_unlock(&queue->mutex);
-
-	return ret;
-}
-
-static int uvc_queue_buffer(struct uvc_video_queue *queue,
-			    struct v4l2_buffer *buf)
-{
-	unsigned long flags;
-	int ret;
-
-	mutex_lock(&queue->mutex);
-	ret = vb2_qbuf(&queue->queue, buf);
-	if (ret < 0)
-		goto done;
-
-	spin_lock_irqsave(&queue->irqlock, flags);
-	ret = (queue->flags & UVC_QUEUE_PAUSED) != 0;
-	queue->flags &= ~UVC_QUEUE_PAUSED;
-	spin_unlock_irqrestore(&queue->irqlock, flags);
-
-done:
-	mutex_unlock(&queue->mutex);
-	return ret;
-}
-
-/*
- * Dequeue a video buffer. If nonblocking is false, block until a buffer is
- * available.
- */
-static int uvc_dequeue_buffer(struct uvc_video_queue *queue,
-			      struct v4l2_buffer *buf, int nonblocking)
-{
-	int ret;
-
-	mutex_lock(&queue->mutex);
-	ret = vb2_dqbuf(&queue->queue, buf, nonblocking);
-	mutex_unlock(&queue->mutex);
-
-	return ret;
-}
-
-/*
- * Poll the video queue.
- *
- * This function implements video queue polling and is intended to be used by
- * the device poll handler.
- */
-static unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
-				   struct file *file, poll_table *wait)
-{
-	unsigned int ret;
-
-	mutex_lock(&queue->mutex);
-	ret = vb2_poll(&queue->queue, file, wait);
-	mutex_unlock(&queue->mutex);
-
-	return ret;
-}
-
-static int uvc_queue_mmap(struct uvc_video_queue *queue,
-			  struct vm_area_struct *vma)
-{
-	int ret;
-
-	mutex_lock(&queue->mutex);
-	ret = vb2_mmap(&queue->queue, vma);
-	mutex_unlock(&queue->mutex);
-
-	return ret;
-}
-
-#ifndef CONFIG_MMU
-/*
- * Get unmapped area.
- *
- * NO-MMU arch need this function to make mmap() work correctly.
- */
-static unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
-		unsigned long pgoff)
-{
-	unsigned long ret;
-
-	mutex_lock(&queue->mutex);
-	ret = vb2_get_unmapped_area(&queue->queue, 0, 0, pgoff, 0);
-	mutex_unlock(&queue->mutex);
-	return ret;
-}
-#endif
-
-/*
- * Cancel the video buffers queue.
- *
- * Cancelling the queue marks all buffers on the irq queue as erroneous,
- * 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.
- *
- * This function acquires the irq spinlock and can be called from interrupt
- * context.
- */
-static void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect)
-{
-	struct uvc_buffer *buf;
-	unsigned long flags;
-
-	spin_lock_irqsave(&queue->irqlock, flags);
-	while (!list_empty(&queue->irqqueue)) {
-		buf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
-				       queue);
-		list_del(&buf->queue);
-		buf->state = UVC_BUF_STATE_ERROR;
-		vb2_buffer_done(&buf->buf, VB2_BUF_STATE_ERROR);
-	}
-	/* This must be protected by the irqlock spinlock to avoid race
-	 * conditions between uvc_queue_buffer and the disconnection event that
-	 * could result in an interruptible wait in uvc_dequeue_buffer. Do not
-	 * blindly replace this logic by checking for the UVC_DEV_DISCONNECTED
-	 * state outside the queue code.
-	 */
-	if (disconnect)
-		queue->flags |= UVC_QUEUE_DISCONNECTED;
-	spin_unlock_irqrestore(&queue->irqlock, flags);
-}
-
-/*
- * Enable or disable the video buffers queue.
- *
- * The queue must be enabled before starting video acquisition and must be
- * disabled after stopping it. This ensures that the video buffers queue
- * state can be properly initialized before buffers are accessed from the
- * interrupt handler.
- *
- * Enabling the video queue initializes parameters (such as sequence number,
- * sync pattern, ...). If the queue is already enabled, return -EBUSY.
- *
- * Disabling the video queue cancels the queue and removes all buffers from
- * the main queue.
- *
- * This function can't be called from interrupt context. Use
- * uvc_queue_cancel() instead.
- */
-static int uvc_queue_enable(struct uvc_video_queue *queue, int enable)
-{
-	unsigned long flags;
-	int ret = 0;
-
-	mutex_lock(&queue->mutex);
-	if (enable) {
-		ret = vb2_streamon(&queue->queue, queue->queue.type);
-		if (ret < 0)
-			goto done;
-
-		queue->sequence = 0;
-		queue->buf_used = 0;
-	} else {
-		ret = vb2_streamoff(&queue->queue, queue->queue.type);
-		if (ret < 0)
-			goto done;
-
-		spin_lock_irqsave(&queue->irqlock, flags);
-		INIT_LIST_HEAD(&queue->irqqueue);
-
-		/*
-		 * FIXME: We need to clear the DISCONNECTED flag to ensure that
-		 * applications will be able to queue buffers for the next
-		 * streaming run. However, clearing it here doesn't guarantee
-		 * that the device will be reconnected in the meantime.
-		 */
-		queue->flags &= ~UVC_QUEUE_DISCONNECTED;
-		spin_unlock_irqrestore(&queue->irqlock, flags);
-	}
-
-done:
-	mutex_unlock(&queue->mutex);
-	return ret;
-}
-
-/* called with &queue_irqlock held.. */
-static struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
-						struct uvc_buffer *buf)
-{
-	struct uvc_buffer *nextbuf;
-
-	if ((queue->flags & UVC_QUEUE_DROP_INCOMPLETE) &&
-	     buf->length != buf->bytesused) {
-		buf->state = UVC_BUF_STATE_QUEUED;
-		vb2_set_plane_payload(&buf->buf, 0, 0);
-		return buf;
-	}
-
-	list_del(&buf->queue);
-	if (!list_empty(&queue->irqqueue))
-		nextbuf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
-					   queue);
-	else
-		nextbuf = NULL;
-
-	buf->buf.v4l2_buf.field = V4L2_FIELD_NONE;
-	buf->buf.v4l2_buf.sequence = queue->sequence++;
-	v4l2_get_timestamp(&buf->buf.v4l2_buf.timestamp);
-
-	vb2_set_plane_payload(&buf->buf, 0, buf->bytesused);
-	vb2_buffer_done(&buf->buf, VB2_BUF_STATE_DONE);
-
-	return nextbuf;
-}
-
-static struct uvc_buffer *uvc_queue_head(struct uvc_video_queue *queue)
-{
-	struct uvc_buffer *buf = NULL;
-
-	if (!list_empty(&queue->irqqueue))
-		buf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
-				       queue);
-	else
-		queue->flags |= UVC_QUEUE_PAUSED;
-
-	return buf;
-}
-