The OMAP3 ISP video devices and buffers queue modules implement the V4L2
API on all the ISP video nodes.
Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxx>
Signed-off-by: David Cohen <dacohen@xxxxxxxxx>
Signed-off-by: Stanimir Varbanov <svarbanov@xxxxxxxxxx>
Signed-off-by: Vimarsh Zutshi <vimarsh.zutshi@xxxxxxxxx>
Signed-off-by: Tuukka Toivonen <tuukkat76@xxxxxxxxx>
Signed-off-by: Sergio Aguirre <saaguirre@xxxxxx>
Signed-off-by: Antti Koskipaa <akoskipa@xxxxxxxxx>
Signed-off-by: Ivan T. Ivanov <iivanov@xxxxxxxxxx>
Signed-off-by: RaniSuneela <r-m@xxxxxx>
Signed-off-by: Atanas Filipov <afilipov@xxxxxxxxxx>
Signed-off-by: Gjorgji Rosikopulos <grosikopulos@xxxxxxxxxx>
Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@xxxxxxxxx>
Signed-off-by: Nayden Kanchev <nkanchev@xxxxxxxxxx>
Signed-off-by: Phil Carmody <ext-phil.2.carmody@xxxxxxxxx>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@xxxxxxxxx>
Signed-off-by: Dominic Curran <dcurran@xxxxxx>
Signed-off-by: Ilkka Myllyperkio <ilkka.myllyperkio@xxxxxxxxx>
Signed-off-by: Pallavi Kulkarni <p-kulkarni@xxxxxx>
Signed-off-by: Vaibhav Hiremath <hvaibhav@xxxxxx>
---
drivers/media/video/omap3-isp/ispqueue.c | 1153 +++++++++++++++++++++++++++
drivers/media/video/omap3-isp/ispqueue.h | 187 +++++
drivers/media/video/omap3-isp/ispvideo.c | 1264 ++++++++++++++++++++++++++++++
drivers/media/video/omap3-isp/ispvideo.h | 202 +++++
4 files changed, 2806 insertions(+), 0 deletions(-)
create mode 100644 drivers/media/video/omap3-isp/ispqueue.c
create mode 100644 drivers/media/video/omap3-isp/ispqueue.h
create mode 100644 drivers/media/video/omap3-isp/ispvideo.c
create mode 100644 drivers/media/video/omap3-isp/ispvideo.h
diff --git a/drivers/media/video/omap3-isp/ispqueue.c b/drivers/media/video/omap3-isp/ispqueue.c
new file mode 100644
index 0000000..8fddc58
--- /dev/null
+++ b/drivers/media/video/omap3-isp/ispqueue.c
@@ -0,0 +1,1153 @@
+/*
+ * ispqueue.c
+ *
+ * TI OMAP3 ISP - Video buffers queue handling
+ *
+ * Copyright (C) 2010 Nokia Corporation
+ *
+ * Contacts: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
+ * Sakari Ailus <sakari.ailus@xxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <asm/cacheflush.h>
+#include <linux/dma-mapping.h>
+#include <linux/mm.h>
+#include <linux/pagemap.h>
+#include <linux/poll.h>
+#include <linux/scatterlist.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+#include "ispqueue.h"
+
+/* -----------------------------------------------------------------------------
+ * Video buffers management
+ */
+
+/*
+ * isp_video_buffer_cache_sync - Keep the buffers coherent between CPU and ISP
+ *
+ * The typical operation required here is Cache Invalidation across
+ * the (user space) buffer address range. And this _must_ be done
+ * at QBUF stage (and *only* at QBUF).
+ *
+ * We try to use optimal cache invalidation function:
+ * - dmac_map_area:
+ * - used when the number of pages are _low_.
+ * - it becomes quite slow as the number of pages increase.
+ * - for 648x492 viewfinder (150 pages) it takes 1.3 ms.
+ * - for 5 Mpix buffer (2491 pages) it takes between 25-50 ms.
+ *
+ * - flush_cache_all:
+ * - used when the number of pages are _high_.
+ * - time taken in the range of 500-900 us.
+ * - has a higher penalty but, as whole dcache + icache is invalidated
+ */
+/*
+ * FIXME: dmac_inv_range crashes randomly on the user space buffer
+ * address. Fall back to flush_cache_all for now.
+ */
+#define ISP_CACHE_FLUSH_PAGES_MAX 0
+
+static void isp_video_buffer_cache_sync(struct isp_video_buffer *buf)
+{
+ if (buf->skip_cache)
+ return;
+
+ if (buf->vbuf.m.userptr == 0 || buf->npages == 0 ||
+ buf->npages > ISP_CACHE_FLUSH_PAGES_MAX)
+ flush_cache_all();
+ else {
+ dmac_map_area((void *)buf->vbuf.m.userptr, buf->vbuf.length,
+ DMA_FROM_DEVICE);
+ outer_inv_range(buf->vbuf.m.userptr,
+ buf->vbuf.m.userptr + buf->vbuf.length);
+ }
+}
+
+/*
+ * isp_video_buffer_lock_vma - Prevent VMAs from being unmapped
+ *
+ * Lock the VMAs underlying the given buffer into memory. This avoids the
+ * userspace buffer mapping from being swapped out, making VIPT cache handling
+ * easier.
+ *
+ * Note that the pages will not be freed as the buffers have been locked to
+ * memory using by a call to get_user_pages(), but the userspace mapping could
+ * still disappear if the VMAs are not locked. This is caused by the memory
+ * management code trying to be as lock-less as possible, which results in the
+ * userspace mapping manager not finding out that the pages are locked under
+ * some conditions.
+ */
+static int isp_video_buffer_lock_vma(struct isp_video_buffer *buf, int lock)
+{
+ struct vm_area_struct *vma;
+ unsigned long start;
+ unsigned long end;
+ int ret = 0;
+
+ if (buf->vbuf.memory == V4L2_MEMORY_MMAP)
+ return 0;
+
+ /* We can be called from workqueue context if the current task dies to
+ * unlock the VMAs. In that case there's no current memory management
+ * context so unlocking can't be performed, but the VMAs have been or
+ * are getting destroyed anyway so it doesn't really matter.
+ */
+ if (!current || !current->mm)
+ return lock ? -EINVAL : 0;
+
+ start = buf->vbuf.m.userptr;
+ end = buf->vbuf.m.userptr + buf->vbuf.length - 1;
+
+ down_write(¤t->mm->mmap_sem);
+ spin_lock(¤t->mm->page_table_lock);
+
+ do {
+ vma = find_vma(current->mm, start);
+ if (vma == NULL) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ if (lock)
+ vma->vm_flags |= VM_LOCKED;
+ else
+ vma->vm_flags &= ~VM_LOCKED;
+
+ start = vma->vm_end + 1;
+ } while (vma->vm_end < end);
+
+ if (lock)
+ buf->vm_flags |= VM_LOCKED;
+ else
+ buf->vm_flags &= ~VM_LOCKED;
+
+out:
+ spin_unlock(¤t->mm->page_table_lock);
+ up_write(¤t->mm->mmap_sem);
+ return ret;
+}
+
+/*
+ * isp_video_buffer_sglist_kernel - Build a scatter list for a vmalloc'ed buffer
+ *
+ * Iterate over the vmalloc'ed area and create a scatter list entry for every
+ * page.
+ */
+static int isp_video_buffer_sglist_kernel(struct isp_video_buffer *buf)
+{
+ struct scatterlist *sglist;
+ unsigned int npages;
+ unsigned int i;
+ void *addr;
+
+ addr = buf->vaddr;
+ npages = PAGE_ALIGN(buf->vbuf.length) >> PAGE_SHIFT;
+
+ sglist = vmalloc(npages * sizeof(*sglist));
+ if (sglist == NULL)
+ return -ENOMEM;
+
+ sg_init_table(sglist, npages);
+
+ for (i = 0; i < npages; ++i, addr += PAGE_SIZE) {
+ struct page *page = vmalloc_to_page(addr);
+
+ if (page == NULL || PageHighMem(page)) {
+ vfree(sglist);
+ return -EINVAL;
+ }
+
+ sg_set_page(&sglist[i], page, PAGE_SIZE, 0);
+ }
+
+ buf->sglen = npages;
+ buf->sglist = sglist;
+
+ return 0;
+}
+
+/*
+ * isp_video_buffer_sglist_user - Build a scatter list for a userspace buffer
+ *
+ * Walk the buffer pages list and create a 1:1 mapping to a scatter list.
+ */
+static int isp_video_buffer_sglist_user(struct isp_video_buffer *buf)
+{
+ struct scatterlist *sglist;
+ unsigned int offset = buf->offset;
+ unsigned int i;
+
+ sglist = vmalloc(buf->npages * sizeof(*sglist));
+ if (sglist == NULL)
+ return -ENOMEM;
+
+ sg_init_table(sglist, buf->npages);
+
+ for (i = 0; i < buf->npages; ++i) {
+ if (PageHighMem(buf->pages[i])) {
+ vfree(sglist);
+ return -EINVAL;
+ }
+
+ sg_set_page(&sglist[i], buf->pages[i], PAGE_SIZE - offset,
+ offset);
+ offset = 0;
+ }
+
+ buf->sglen = buf->npages;
+ buf->sglist = sglist;
+
+ return 0;
+}
+
+/*
+ * isp_video_buffer_sglist_pfnmap - Build a scatter list for a VM_PFNMAP buffer
+ *
+ * Create a scatter list of physically contiguous pages starting at the buffer
+ * memory physical address.
+ */
+static int isp_video_buffer_sglist_pfnmap(struct isp_video_buffer *buf)
+{
+ struct scatterlist *sglist;
+ unsigned int offset = buf->offset;
+ unsigned long pfn = buf->paddr >> PAGE_SHIFT;
+ unsigned int i;
+
+ sglist = vmalloc(buf->npages * sizeof(*sglist));
+ if (sglist == NULL)
+ return -ENOMEM;
+
+ sg_init_table(sglist, buf->npages);
+
+ for (i = 0; i < buf->npages; ++i, ++pfn) {
+ sg_set_page(&sglist[i], pfn_to_page(pfn), PAGE_SIZE - offset,
+ offset);
+ /* PFNMAP buffers will not get DMA-mapped, set the DMA address
+ * manually.
+ */
+ sg_dma_address(&sglist[i]) = (pfn << PAGE_SHIFT) + offset;
+ offset = 0;
+ }
+
+ buf->sglen = buf->npages;
+ buf->sglist = sglist;
+
+ return 0;
+}
+
+/*
+ * isp_video_buffer_cleanup - Release pages for a userspace VMA.
+ *
+ * Release pages locked by a call isp_video_buffer_prepare_user and free the
+ * pages table.
+ */
+static void isp_video_buffer_cleanup(struct isp_video_buffer *buf)
+{
+ enum dma_data_direction direction;
+ unsigned int i;
+
+ if (buf->queue->ops->buffer_cleanup)
+ buf->queue->ops->buffer_cleanup(buf);
+
+ if (!(buf->vm_flags & VM_PFNMAP)) {
+ direction = buf->vbuf.type == V4L2_BUF_TYPE_VIDEO_CAPTURE
+ ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
+ dma_unmap_sg(buf->queue->dev, buf->sglist, buf->sglen,
+ direction);
+ }
+
+ vfree(buf->sglist);
+ buf->sglist = NULL;
+ buf->sglen = 0;
+
+ if (buf->pages != NULL) {
+ isp_video_buffer_lock_vma(buf, 0);
+
+ for (i = 0; i < buf->npages; ++i)
+ page_cache_release(buf->pages[i]);
+
+ vfree(buf->pages);
+ buf->pages = NULL;
+ }
+
+ buf->npages = 0;
+ buf->skip_cache = false;
+}
+
+/*
+ * isp_video_buffer_prepare_user - Pin userspace VMA pages to memory.
+ *
+ * This function creates a list of pages for a userspace VMA. The number of
+ * pages is first computed based on the buffer size, and pages are then
+ * retrieved by a call to get_user_pages.
+ *
+ * Pages are pinned to memory by get_user_pages, making them available for DMA
+ * transfers. However, due to memory management optimization, it seems the
+ * get_user_pages doesn't guarantee that the pinned pages will not be written
+ * to swap and removed from the userspace mapping(s). When this happens, a page
+ * fault can be generated when accessing those unmapped pages.
+ *
+ * If the fault is triggered by a page table walk caused by VIPT cache
+ * management operations, the page fault handler might oops if the MM semaphore
+ * is held, as it can't handle kernel page faults in that case. To fix that, a
+ * fixup entry needs to be added to the cache management code, or the userspace
+ * VMA must be locked to avoid removing pages from the userspace mapping in the
+ * first place.
+ *
+ * If the number of pages retrieved is smaller than the number required by the
+ * buffer size, the function returns -EFAULT.
+ */
+static int isp_video_buffer_prepare_user(struct isp_video_buffer *buf)
+{
+ unsigned long data;
+ unsigned int first;
+ unsigned int last;
+ int ret;
+
+ data = buf->vbuf.m.userptr;
+ first = (data & PAGE_MASK) >> PAGE_SHIFT;
+ last = ((data + buf->vbuf.length - 1) & PAGE_MASK) >> PAGE_SHIFT;
+
+ buf->offset = data & ~PAGE_MASK;
+ buf->npages = last - first + 1;
+ buf->pages = vmalloc(buf->npages * sizeof(buf->pages[0]));
+ if (buf->pages == NULL)
+ return -ENOMEM;
+
+ down_read(¤t->mm->mmap_sem);
+ ret = get_user_pages(current, current->mm, data & PAGE_MASK,
+ buf->npages,
+ buf->vbuf.type == V4L2_BUF_TYPE_VIDEO_CAPTURE, 0,
+ buf->pages, NULL);
+ up_read(¤t->mm->mmap_sem);
+
+ if (ret != buf->npages) {
+ buf->npages = ret;
+ isp_video_buffer_cleanup(buf);
+ return -EFAULT;
+ }
+
+ ret = isp_video_buffer_lock_vma(buf, 1);
+ if (ret < 0)
+ isp_video_buffer_cleanup(buf);
+
+ return ret;
+}
+
+/*
+ * isp_video_buffer_prepare_pfnmap - Validate a VM_PFNMAP userspace buffer
+ *
+ * Userspace VM_PFNMAP buffers are supported only if they are contiguous in
+ * memory and if they span a single VMA.
+ *
+ * Return 0 if the buffer is valid, or -EFAULT otherwise.
+ */
+static int isp_video_buffer_prepare_pfnmap(struct isp_video_buffer *buf)
+{
+ struct vm_area_struct *vma;
+ unsigned long prev_pfn;
+ unsigned long this_pfn;
+ unsigned long start;
+ unsigned long end;
+ dma_addr_t pa;
+ int ret = -EFAULT;
+
+ start = buf->vbuf.m.userptr;
+ end = buf->vbuf.m.userptr + buf->vbuf.length - 1;
+
+ buf->offset = start & ~PAGE_MASK;
+ buf->npages = (end >> PAGE_SHIFT) - (start >> PAGE_SHIFT) + 1;
+ buf->pages = NULL;
+
+ down_read(¤t->mm->mmap_sem);
+ vma = find_vma(current->mm, start);
+ if (vma == NULL || vma->vm_end < end)
+ goto done;
+
+ for (prev_pfn = 0; start <= end; start += PAGE_SIZE) {
+ ret = follow_pfn(vma, start, &this_pfn);
+ if (ret)
+ goto done;
+
+ if (prev_pfn == 0)
+ pa = this_pfn << PAGE_SHIFT;
+ else if (this_pfn != prev_pfn + 1) {
+ ret = -EFAULT;
+ goto done;
+ }
+
+ prev_pfn = this_pfn;
+ }
+
+ buf->paddr = pa + buf->offset;
+ ret = 0;
+
+done:
+ up_read(¤t->mm->mmap_sem);
+ return ret;
+}
+
+/*
+ * isp_video_buffer_prepare_vm_flags - Get VMA flags for a userspace address
+ *
+ * This function locates the VMAs for the buffer's userspace address and checks
+ * that their flags match. The onlflag that we need to care for at the moment is
+ * VM_PFNMAP.
+ *
+ * The buffer vm_flags field is set to the first VMA flags.
+ *
+ * Return -EFAULT if no VMA can be found for part of the buffer, or if the VMAs
+ * have incompatible flags.
+ */
+static int isp_video_buffer_prepare_vm_flags(struct isp_video_buffer *buf)
+{
+ struct vm_area_struct *vma;
+ pgprot_t vm_page_prot;
+ unsigned long start;
+ unsigned long end;
+ int ret = -EFAULT;
+
+ start = buf->vbuf.m.userptr;
+ end = buf->vbuf.m.userptr + buf->vbuf.length - 1;
+
+ down_read(¤t->mm->mmap_sem);
+
+ do {
+ vma = find_vma(current->mm, start);
+ if (vma == NULL)
+ goto done;
+
+ if (start == buf->vbuf.m.userptr) {
+ buf->vm_flags = vma->vm_flags;
+ vm_page_prot = vma->vm_page_prot;
+ }
+
+ if ((buf->vm_flags ^ vma->vm_flags) & VM_PFNMAP)
+ goto done;
+
+ if (vm_page_prot != vma->vm_page_prot)
+ goto done;
+
+ start = vma->vm_end + 1;
+ } while (vma->vm_end < end);
+
+ /* Skip cache management to enhance performances for non-cached or
+ * write-combining buffers.
+ */
+ if (vm_page_prot == pgprot_noncached(vm_page_prot) ||
+ vm_page_prot == pgprot_writecombine(vm_page_prot))
+ buf->skip_cache = true;
+
+ ret = 0;
+
+done:
+ up_read(¤t->mm->mmap_sem);
+ return ret;
+}
+
+/*
+ * isp_video_buffer_prepare - Make a buffer ready for operation
+ *
+ * Preparing a buffer involves:
+ *
+ * - validating VMAs (userspace buffers only)
+ * - locking pages and VMAs into memory (userspace buffers only)
+ * - building page and scatter-gather lists
+ * - mapping buffers for DMA operation
+ * - performing driver-specific preparation
+ *
+ * The function must be called in userspace context with a valid mm context
+ * (this excludes cleanup paths such as sys_close when the userspace process
+ * segfaults).
+ */
+static int isp_video_buffer_prepare(struct isp_video_buffer *buf)
+{
+ enum dma_data_direction direction;
+ int ret;
+
+ switch (buf->vbuf.memory) {
+ case V4L2_MEMORY_MMAP:
+ ret = isp_video_buffer_sglist_kernel(buf);
+ break;
+
+ case V4L2_MEMORY_USERPTR:
+ ret = isp_video_buffer_prepare_vm_flags(buf);
+ if (ret < 0)
+ return ret;
+
+ if (buf->vm_flags & VM_PFNMAP) {
+ ret = isp_video_buffer_prepare_pfnmap(buf);
+ if (ret < 0)
+ return ret;
+
+ ret = isp_video_buffer_sglist_pfnmap(buf);
+ } else {
+ ret = isp_video_buffer_prepare_user(buf);
+ if (ret < 0)
+ return ret;
+
+ ret = isp_video_buffer_sglist_user(buf);
+ }
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ if (ret < 0)
+ goto done;
+
+ if (!(buf->vm_flags & VM_PFNMAP)) {
+ direction = buf->vbuf.type == V4L2_BUF_TYPE_VIDEO_CAPTURE
+ ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
+ ret = dma_map_sg(buf->queue->dev, buf->sglist, buf->sglen,
+ direction);
+ if (ret != buf->sglen) {
+ ret = -EFAULT;
+ goto done;
+ }
+ }
+
+ if (buf->queue->ops->buffer_prepare)
+ ret = buf->queue->ops->buffer_prepare(buf);
+
+done:
+ if (ret < 0) {
+ isp_video_buffer_cleanup(buf);
+ return ret;
+ }
+
+ return ret;
+}
+
+/*
+ * isp_video_queue_query - Query the status of a given buffer
+ *
+ * Locking: must be called with the queue lock held.
+ */
+static void isp_video_buffer_query(struct isp_video_buffer *buf,
+ struct v4l2_buffer *vbuf)
+{
+ memcpy(vbuf, &buf->vbuf, sizeof(*vbuf));
+
+ if (buf->vma_use_count)
+ vbuf->flags |= V4L2_BUF_FLAG_MAPPED;
+
+ switch (buf->state) {
+ case ISP_BUF_STATE_ERROR:
+ vbuf->flags |= V4L2_BUF_FLAG_ERROR;
+ case ISP_BUF_STATE_DONE:
+ vbuf->flags |= V4L2_BUF_FLAG_DONE;
+ case ISP_BUF_STATE_QUEUED:
+ case ISP_BUF_STATE_ACTIVE:
+ vbuf->flags |= V4L2_BUF_FLAG_QUEUED;
+ break;
+ case ISP_BUF_STATE_IDLE:
+ default:
+ break;
+ }
+}
+
+/*
+ * isp_video_buffer_wait - Wait for a buffer to be ready
+ *
+ * In non-blocking mode, return immediately with 0 if the buffer is ready or
+ * -EAGAIN if the buffer is in the QUEUED or ACTIVE state.
+ *
+ * In blocking mode, wait (interruptibly but with no timeout) on the buffer wait
+ * queue using the same condition.
+ */
+static int isp_video_buffer_wait(struct isp_video_buffer *buf, int nonblocking)
+{
+ if (nonblocking) {
+ return (buf->state != ISP_BUF_STATE_QUEUED &&
+ buf->state != ISP_BUF_STATE_ACTIVE)
+ ? 0 : -EAGAIN;
+ }
+
+ return wait_event_interruptible(buf->wait,
+ buf->state != ISP_BUF_STATE_QUEUED &&
+ buf->state != ISP_BUF_STATE_ACTIVE);
+}
+
+/* -----------------------------------------------------------------------------
+ * Queue management
+ */
+
+/*
+ * isp_video_queue_free - Free video buffers memory
+ *
+ * Buffers can only be freed if the queue isn't streaming and if no buffer is
+ * mapped to userspace. Return -EBUSY if those conditions aren't statisfied.
+ *
+ * This function must be called with the queue lock held.
+ */
+static int isp_video_queue_free(struct isp_video_queue *queue)
+{
+ unsigned int i;
+
+ if (queue->streaming)
+ return -EBUSY;
+
+ for (i = 0; i < queue->count; ++i) {
+ if (queue->buffers[i]->vma_use_count != 0)
+ return -EBUSY;
+ }
+
+ for (i = 0; i < queue->count; ++i) {
+ struct isp_video_buffer *buf = queue->buffers[i];
+
+ isp_video_buffer_cleanup(buf);
+
+ vfree(buf->vaddr);
+ buf->vaddr = NULL;
+
+ kfree(buf);
+ queue->buffers[i] = NULL;
+ }
+
+ INIT_LIST_HEAD(&queue->queue);
+ queue->count = 0;
+ return 0;
+}
+
+/*
+ * isp_video_queue_alloc - Allocate video buffers memory
+ *
+ * This function must be called with the queue lock held.
+ */
+static int isp_video_queue_alloc(struct isp_video_queue *queue,
+ unsigned int nbuffers,
+ unsigned int size, enum v4l2_memory memory)
+{
+ struct isp_video_buffer *buf;
+ unsigned int i;
+ void *mem;
+ int ret;
+
+ /* Start by freeing the buffers. */
+ ret = isp_video_queue_free(queue);
+ if (ret < 0)
+ return ret;
+
+ /* Bail out of no buffers should be allocated. */
+ if (nbuffers == 0)
+ return 0;
+
+ /* Initialize the allocated buffers. */
+ for (i = 0; i < nbuffers; ++i) {
+ buf = kzalloc(queue->bufsize, GFP_KERNEL);
+ if (buf == NULL)
+ break;
+
+ if (memory == V4L2_MEMORY_MMAP) {
+ /* Allocate video buffers memory for mmap mode. Align
+ * the size to the page size.
+ */
+ mem = vmalloc_32_user(PAGE_ALIGN(size));
+ if (mem == NULL) {
+ kfree(buf);
+ break;
+ }
+
+ buf->vbuf.m.offset = i * PAGE_ALIGN(size);
+ buf->vaddr = mem;
+ }
+
+ buf->vbuf.index = i;
+ buf->vbuf.length = size;
+ buf->vbuf.type = queue->type;
+ buf->vbuf.field = V4L2_FIELD_NONE;
+ buf->vbuf.memory = memory;
+
+ buf->queue = queue;
+ init_waitqueue_head(&buf->wait);
+
+ queue->buffers[i] = buf;
+ }
+
+ if (i == 0)
+ return -ENOMEM;
+
+ queue->count = i;
+ return nbuffers;
+}
+
+/**
+ * omap3isp_video_queue_cleanup - Clean up the video buffers queue
+ * @queue: Video buffers queue
+ *
+ * Free all allocated resources and clean up the video buffers queue. The queue
+ * must not be busy (no ongoing video stream) and buffers must have been
+ * unmapped.
+ *
+ * Return 0 on success or -EBUSY if the queue is busy or buffers haven't been
+ * unmapped.
+ */
+int omap3isp_video_queue_cleanup(struct isp_video_queue *queue)
+{
+ return isp_video_queue_free(queue);
+}
+
+/**
+ * omap3isp_video_queue_init - Initialize the video buffers queue
+ * @queue: Video buffers queue
+ * @type: V4L2 buffer type (capture or output)
+ * @ops: Driver-specific queue operations
+ * @dev: Device used for DMA operations
+ * @bufsize: Size of the driver-specific buffer structure
+ *
+ * Initialize the video buffers queue with the supplied parameters.
+ *
+ * The queue type must be one of V4L2_BUF_TYPE_VIDEO_CAPTURE or
+ * V4L2_BUF_TYPE_VIDEO_OUTPUT. Other buffer types are not supported yet.
+ *
+ * Buffer objects will be allocated using the given buffer size to allow room
+ * for driver-specific fields. Driver-specific buffer structures must start
+ * with a struct isp_video_buffer field. Drivers with no driver-specific buffer
+ * structure must pass the size of the isp_video_buffer structure in the bufsize
+ * parameter.
+ *
+ * Return 0 on success.
+ */
+int omap3isp_video_queue_init(struct isp_video_queue *queue,
+ enum v4l2_buf_type type,
+ const struct isp_video_queue_operations *ops,
+ struct device *dev, unsigned int bufsize)
+{
+ INIT_LIST_HEAD(&queue->queue);
+ mutex_init(&queue->lock);
+ spin_lock_init(&queue->irqlock);
+
+ queue->type = type;
+ queue->ops = ops;
+ queue->dev = dev;
+ queue->bufsize = bufsize;
+
+ return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 operations
+ */
+
+/**
+ * omap3isp_video_queue_reqbufs - Allocate video buffers memory
+ *
+ * This function is intended to be used as a VIDIOC_REQBUFS ioctl handler. It
+ * allocated video buffer objects and, for MMAP buffers, buffer memory.
+ *
+ * If the number of buffers is 0, all buffers are freed and the function returns
+ * without performing any allocation.
+ *
+ * If the number of buffers is not 0, currently allocated buffers (if any) are
+ * freed and the requested number of buffers are allocated. Depending on
+ * driver-specific requirements and on memory availability, a number of buffer
+ * smaller or bigger than requested can be allocated. This isn't considered as
+ * an error.
+ *
+ * Return 0 on success or one of the following error codes:
+ *
+ * -EINVAL if the buffer type or index are invalid
+ * -EBUSY if the queue is busy (streaming or buffers mapped)
+ * -ENOMEM if the buffers can't be allocated due to an out-of-memory condition
+ */
+int omap3isp_video_queue_reqbufs(struct isp_video_queue *queue,
+ struct v4l2_requestbuffers *rb)
+{
+ unsigned int nbuffers = rb->count;
+ unsigned int size;
+ int ret;
+
+ if (rb->type != queue->type)
+ return -EINVAL;
+
+ queue->ops->queue_prepare(queue, &nbuffers, &size);
+ if (size == 0)
+ return -EINVAL;
+
+ nbuffers = min_t(unsigned int, nbuffers, ISP_VIDEO_MAX_BUFFERS);
+
+ mutex_lock(&queue->lock);
+
+ ret = isp_video_queue_alloc(queue, nbuffers, size, rb->memory);
+ if (ret < 0)
+ goto done;
+
+ rb->count = ret;
+ ret = 0;
+
+done:
+ mutex_unlock(&queue->lock);
+ return ret;
+}
+
+/**
+ * omap3isp_video_queue_querybuf - Query the status of a buffer in a queue
+ *
+ * This function is intended to be used as a VIDIOC_QUERYBUF ioctl handler. It
+ * returns the status of a given video buffer.
+ *
+ * Return 0 on success or -EINVAL if the buffer type or index are invalid.
+ */
+int omap3isp_video_queue_querybuf(struct isp_video_queue *queue,
+ struct v4l2_buffer *vbuf)
+{
+ struct isp_video_buffer *buf;
+ int ret = 0;
+
+ if (vbuf->type != queue->type)
+ return -EINVAL;
+
+ mutex_lock(&queue->lock);
+
+ if (vbuf->index >= queue->count) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ buf = queue->buffers[vbuf->index];
+ isp_video_buffer_query(buf, vbuf);
+
+done:
+ mutex_unlock(&queue->lock);
+ return ret;
+}
+
+/**
+ * omap3isp_video_queue_qbuf - Queue a buffer
+ *
+ * This function is intended to be used as a VIDIOC_QBUF ioctl handler.
+ *
+ * The v4l2_buffer structure passed from userspace is first sanity tested. If
+ * sane, the buffer is then processed and added to the main queue and, if the
+ * queue is streaming, to the IRQ queue.
+ *
+ * Before being enqueued, USERPTR buffers are checked for address changes. If
+ * the buffer has a different userspace address, the old memory area is unlocked
+ * and the new memory area is locked.
+ */
+int omap3isp_video_queue_qbuf(struct isp_video_queue *queue,
+ struct v4l2_buffer *vbuf)
+{
+ struct isp_video_buffer *buf;
+ unsigned long flags;
+ int ret = -EINVAL;
+
+ if (vbuf->type != queue->type)
+ goto done;
+
+ mutex_lock(&queue->lock);
+
+ if (vbuf->index >= queue->count)
+ goto done;
+
+ buf = queue->buffers[vbuf->index];
+
+ if (vbuf->memory != buf->vbuf.memory)
+ goto done;
+
+ if (buf->state != ISP_BUF_STATE_IDLE)
+ goto done;
+
+ if (vbuf->memory == V4L2_MEMORY_USERPTR &&
+ vbuf->m.userptr != buf->vbuf.m.userptr) {
+ isp_video_buffer_cleanup(buf);
+ buf->vbuf.m.userptr = vbuf->m.userptr;
+ buf->prepared = 0;
+ }
+
+ if (!buf->prepared) {
+ ret = isp_video_buffer_prepare(buf);
+ if (ret < 0)
+ goto done;
+ buf->prepared = 1;
+ }
+
+ isp_video_buffer_cache_sync(buf);
+
+ buf->state = ISP_BUF_STATE_QUEUED;
+ list_add_tail(&buf->stream, &queue->queue);
+
+ if (queue->streaming) {
+ spin_lock_irqsave(&queue->irqlock, flags);
+ queue->ops->buffer_queue(buf);
+ spin_unlock_irqrestore(&queue->irqlock, flags);
+ }
+
+ ret = 0;
+
+done:
+ mutex_unlock(&queue->lock);
+ return ret;
+}
+
+/**
+ * omap3isp_video_queue_dqbuf - Dequeue a buffer
+ *
+ * This function is intended to be used as a VIDIOC_DQBUF ioctl handler.
+ *
+ * The v4l2_buffer structure passed from userspace is first sanity tested. If
+ * sane, the buffer is then processed and added to the main queue and, if the
+ * queue is streaming, to the IRQ queue.
+ *
+ * Before being enqueued, USERPTR buffers are checked for address changes. If
+ * the buffer has a different userspace address, the old memory area is unlocked
+ * and the new memory area is locked.
+ */
+int omap3isp_video_queue_dqbuf(struct isp_video_queue *queue,
+ struct v4l2_buffer *vbuf, int nonblocking)
+{
+ struct isp_video_buffer *buf;
+ int ret;
+
+ if (vbuf->type != queue->type)
+ return -EINVAL;
+
+ mutex_lock(&queue->lock);
+
+ if (list_empty(&queue->queue)) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ buf = list_first_entry(&queue->queue, struct isp_video_buffer, stream);
+ ret = isp_video_buffer_wait(buf, nonblocking);
+ if (ret < 0)
+ goto done;
+
+ list_del(&buf->stream);
+
+ isp_video_buffer_query(buf, vbuf);
+ buf->state = ISP_BUF_STATE_IDLE;
+ vbuf->flags &= ~V4L2_BUF_FLAG_QUEUED;
+
+done:
+ mutex_unlock(&queue->lock);
+ return ret;
+}
+
+/**
+ * omap3isp_video_queue_streamon - Start streaming
+ *
+ * This function is intended to be used as a VIDIOC_STREAMON ioctl handler. It
+ * starts streaming on the queue and calls the buffer_queue operation for all
+ * queued buffers.
+ *
+ * Return 0 on success.
+ */
+int omap3isp_video_queue_streamon(struct isp_video_queue *queue)
+{
+ struct isp_video_buffer *buf;
+ unsigned long flags;
+
+ mutex_lock(&queue->lock);
+
+ if (queue->streaming)
+ goto done;
+
+ queue->streaming = 1;
+
+ spin_lock_irqsave(&queue->irqlock, flags);
+ list_for_each_entry(buf, &queue->queue, stream)
+ queue->ops->buffer_queue(buf);
+ spin_unlock_irqrestore(&queue->irqlock, flags);
+
+done:
+ mutex_unlock(&queue->lock);
+ return 0;
+}
+
+/**
+ * omap3isp_video_queue_streamoff - Stop streaming
+ *
+ * This function is intended to be used as a VIDIOC_STREAMOFF ioctl handler. It
+ * stops streaming on the queue and wakes up all the buffers.
+ *
+ * Drivers must stop the hardware and synchronize with interrupt handlers and/or
+ * delayed works before calling this function to make sure no buffer will be
+ * touched by the driver and/or hardware.
+ */
+void omap3isp_video_queue_streamoff(struct isp_video_queue *queue)
+{
+ struct isp_video_buffer *buf;
+ unsigned long flags;
+ unsigned int i;
+
+ mutex_lock(&queue->lock);
+
+ if (!queue->streaming)
+ goto done;
+
+ queue->streaming = 0;
+
+ spin_lock_irqsave(&queue->irqlock, flags);
+ for (i = 0; i < queue->count; ++i) {
+ buf = queue->buffers[i];
+
+ if (buf->state == ISP_BUF_STATE_ACTIVE)
+ wake_up(&buf->wait);
+
+ buf->state = ISP_BUF_STATE_IDLE;
+ }
+ spin_unlock_irqrestore(&queue->irqlock, flags);
+
+ INIT_LIST_HEAD(&queue->queue);
+
+done:
+ mutex_unlock(&queue->lock);
+}
+
+/**
+ * omap3isp_video_queue_discard_done - Discard all buffers marked as DONE
+ *
+ * This function is intended to be used with suspend/resume operations. It
+ * discards all 'done' buffers as they would be too old to be requested after
+ * resume.
+ *
+ * Drivers must stop the hardware and synchronize with interrupt handlers and/or
+ * delayed works before calling this function to make sure no buffer will be
+ * touched by the driver and/or hardware.
+ */
+void omap3isp_video_queue_discard_done(struct isp_video_queue *queue)
+{
+ struct isp_video_buffer *buf;
+ unsigned int i;
+
+ mutex_lock(&queue->lock);
+
+ if (!queue->streaming)
+ goto done;
+
+ for (i = 0; i < queue->count; ++i) {
+ buf = queue->buffers[i];
+
+ if (buf->state == ISP_BUF_STATE_DONE)
+ buf->state = ISP_BUF_STATE_ERROR;
+ }
+
+done:
+ mutex_unlock(&queue->lock);
+}
+
+static void isp_video_queue_vm_open(struct vm_area_struct *vma)
+{
+ struct isp_video_buffer *buf = vma->vm_private_data;
+
+ buf->vma_use_count++;
+}
+
+static void isp_video_queue_vm_close(struct vm_area_struct *vma)
+{
+ struct isp_video_buffer *buf = vma->vm_private_data;
+
+ buf->vma_use_count--;
+}
+
+static const struct vm_operations_struct isp_video_queue_vm_ops = {
+ .open = isp_video_queue_vm_open,
+ .close = isp_video_queue_vm_close,
+};
+
+/**
+ * omap3isp_video_queue_mmap - Map buffers to userspace
+ *
+ * This function is intended to be used as an mmap() file operation handler. It
+ * maps a buffer to userspace based on the VMA offset.
+ *
+ * Only buffers of memory type MMAP are supported.
+ */
+int omap3isp_video_queue_mmap(struct isp_video_queue *queue,
+ struct vm_area_struct *vma)
+{
+ struct isp_video_buffer *uninitialized_var(buf);
+ unsigned long size;
+ unsigned int i;
+ int ret = 0;
+
+ mutex_lock(&queue->lock);
+
+ for (i = 0; i < queue->count; ++i) {
+ buf = queue->buffers[i];
+ if ((buf->vbuf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
+ break;
+ }
+
+ if (i == queue->count) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ size = vma->vm_end - vma->vm_start;
+
+ if (buf->vbuf.memory != V4L2_MEMORY_MMAP ||
+ size != PAGE_ALIGN(buf->vbuf.length)) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ ret = remap_vmalloc_range(vma, buf->vaddr, 0);
+ if (ret < 0)
+ goto done;
+
+ vma->vm_ops = &isp_video_queue_vm_ops;
+ vma->vm_private_data = buf;
+ isp_video_queue_vm_open(vma);
+
+done:
+ mutex_unlock(&queue->lock);
+ return ret;
+}
+
+/**
+ * omap3isp_video_queue_poll - Poll video queue state
+ *
+ * This function is intended to be used as a poll() file operation handler. It
+ * polls the state of the video buffer at the front of the queue and returns an
+ * events mask.
+ *
+ * If no buffer is present at the front of the queue, POLLERR is returned.
+ */
+unsigned int omap3isp_video_queue_poll(struct isp_video_queue *queue,
+ struct file *file, poll_table *wait)
+{
+ struct isp_video_buffer *buf;
+ unsigned int mask = 0;
+
+ mutex_lock(&queue->lock);
+ if (list_empty(&queue->queue)) {
+ mask |= POLLERR;
+ goto done;
+ }
+ buf = list_first_entry(&queue->queue, struct isp_video_buffer, stream);
+
+ poll_wait(file, &buf->wait, wait);
+ if (buf->state == ISP_BUF_STATE_DONE ||
+ buf->state == ISP_BUF_STATE_ERROR) {
+ if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ mask |= POLLIN | POLLRDNORM;
+ else
+ mask |= POLLOUT | POLLWRNORM;
+ }
+
+done:
+ mutex_unlock(&queue->lock);
+ return mask;
+}
diff --git a/drivers/media/video/omap3-isp/ispqueue.h b/drivers/media/video/omap3-isp/ispqueue.h
new file mode 100644
index 0000000..251de3e
--- /dev/null
+++ b/drivers/media/video/omap3-isp/ispqueue.h
@@ -0,0 +1,187 @@
+/*
+ * ispqueue.h
+ *
+ * TI OMAP3 ISP - Video buffers queue handling
+ *
+ * Copyright (C) 2010 Nokia Corporation
+ *
+ * Contacts: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
+ * Sakari Ailus <sakari.ailus@xxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#ifndef OMAP3_ISP_QUEUE_H
+#define OMAP3_ISP_QUEUE_H
+
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/videodev2.h>
+#include <linux/wait.h>
+
+struct isp_video_queue;
+struct page;
+struct scatterlist;
+
+#define ISP_VIDEO_MAX_BUFFERS 16
+
+/**
+ * enum isp_video_buffer_state - ISP video buffer state
+ * @ISP_BUF_STATE_IDLE: The buffer is under userspace control (dequeued
+ * or not queued yet).
+ * @ISP_BUF_STATE_QUEUED: The buffer has been queued but isn't used by the
+ * device yet.
+ * @ISP_BUF_STATE_ACTIVE: The buffer is in use for an active video transfer.
+ * @ISP_BUF_STATE_ERROR: The device is done with the buffer and an error
+ * occured. For capture device the buffer likely contains corrupted data or
+ * no data at all.
+ * @ISP_BUF_STATE_DONE: The device is done with the buffer and no error occured.
+ * For capture devices the buffer contains valid data.
+ */
+enum isp_video_buffer_state {
+ ISP_BUF_STATE_IDLE,
+ ISP_BUF_STATE_QUEUED,
+ ISP_BUF_STATE_ACTIVE,
+ ISP_BUF_STATE_ERROR,
+ ISP_BUF_STATE_DONE,
+};
+
+/**
+ * struct isp_video_buffer - ISP video buffer
+ * @vma_use_count: Number of times the buffer is mmap'ed to userspace
+ * @stream: List head for insertion into main queue
+ * @queue: ISP buffers queue this buffer belongs to
+ * @prepared: Whether the buffer has been prepared
+ * @skip_cache: Whether to skip cache management operations for this buffer
+ * @vaddr: Memory virtual address (for kernel buffers)
+ * @vm_flags: Buffer VMA flags (for userspace buffers)
+ * @offset: Offset inside the first page (for userspace buffers)
+ * @npages: Number of pages (for userspace buffers)
+ * @pages: Pages table (for userspace non-VM_PFNMAP buffers)
+ * @paddr: Memory physical address (for userspace VM_PFNMAP buffers)
+ * @sglen: Number of elements in the scatter list (for non-VM_PFNMAP buffers)
+ * @sglist: Scatter list (for non-VM_PFNMAP buffers)
+ * @vbuf: V4L2 buffer
+ * @irqlist: List head for insertion into IRQ queue
+ * @state: Current buffer state
+ * @wait: Wait queue to signal buffer completion
+ */
+struct isp_video_buffer {
+ unsigned long vma_use_count;
+ struct list_head stream;
+ struct isp_video_queue *queue;
+ unsigned int prepared:1;
+ bool skip_cache;
+
+ /* For kernel buffers. */
+ void *vaddr;
+
+ /* For userspace buffers. */
+ unsigned long vm_flags;
+ unsigned long offset;
+ unsigned int npages;
+ struct page **pages;
+ dma_addr_t paddr;
+
+ /* For all buffers except VM_PFNMAP. */
+ unsigned int sglen;
+ struct scatterlist *sglist;
+
+ /* Touched by the interrupt handler. */
+ struct v4l2_buffer vbuf;
+ struct list_head irqlist;
+ enum isp_video_buffer_state state;
+ wait_queue_head_t wait;
+};
+
+#define to_isp_video_buffer(vb) container_of(vb, struct isp_video_buffer, vb)
+
+/**
+ * struct isp_video_queue_operations - Driver-specific operations
+ * @queue_prepare: Called before allocating buffers. Drivers should clamp the
+ * number of buffers according to their requirements, and must return the
+ * buffer size in bytes.
+ * @buffer_prepare: Called the first time a buffer is queued, or after changing
+ * the userspace memory address for a USERPTR buffer, with the queue lock
+ * held. Drivers should perform device-specific buffer preparation (such as
+ * mapping the buffer memory in an IOMMU). This operation is optional.
+ * @buffer_queue: Called when a buffer is being added to the queue with the
+ * queue irqlock spinlock held.
+ * @buffer_cleanup: Called before freeing buffers, or before changing the
+ * userspace memory address for a USERPTR buffer, with the queue lock held.
+ * Drivers must perform cleanup operations required to undo the
+ * buffer_prepare call. This operation is optional.
+ */
+struct isp_video_queue_operations {
+ void (*queue_prepare)(struct isp_video_queue *queue,
+ unsigned int *nbuffers, unsigned int *size);
+ int (*buffer_prepare)(struct isp_video_buffer *buf);
+ void (*buffer_queue)(struct isp_video_buffer *buf);
+ void (*buffer_cleanup)(struct isp_video_buffer *buf);
+};
+
+/**
+ * struct isp_video_queue - ISP video buffers queue
+ * @type: Type of video buffers handled by this queue
+ * @ops: Queue operations
+ * @dev: Device used for DMA operations
+ * @bufsize: Size of a driver-specific buffer object
+ * @count: Number of currently allocated buffers
+ * @buffers: ISP video buffers
+ * @lock: Mutex to protect access to the buffers, main queue and state
+ * @irqlock: Spinlock to protect access to the IRQ queue
+ * @streaming: Queue state, indicates whether the queue is streaming
+ * @queue: List of all queued buffers
+ */
+struct isp_video_queue {
+ enum v4l2_buf_type type;
+ const struct isp_video_queue_operations *ops;
+ struct device *dev;
+ unsigned int bufsize;
+
+ unsigned int count;
+ struct isp_video_buffer *buffers[ISP_VIDEO_MAX_BUFFERS];
+ struct mutex lock;
+ spinlock_t irqlock;
+
+ unsigned int streaming:1;
+
+ struct list_head queue;
+};
+
+int omap3isp_video_queue_cleanup(struct isp_video_queue *queue);
+int omap3isp_video_queue_init(struct isp_video_queue *queue,
+ enum v4l2_buf_type type,
+ const struct isp_video_queue_operations *ops,
+ struct device *dev, unsigned int bufsize);
+
+int omap3isp_video_queue_reqbufs(struct isp_video_queue *queue,
+ struct v4l2_requestbuffers *rb);
+int omap3isp_video_queue_querybuf(struct isp_video_queue *queue,
+ struct v4l2_buffer *vbuf);
+int omap3isp_video_queue_qbuf(struct isp_video_queue *queue,
+ struct v4l2_buffer *vbuf);
+int omap3isp_video_queue_dqbuf(struct isp_video_queue *queue,
+ struct v4l2_buffer *vbuf, int nonblocking);
+int omap3isp_video_queue_streamon(struct isp_video_queue *queue);
+void omap3isp_video_queue_streamoff(struct isp_video_queue *queue);
+void omap3isp_video_queue_discard_done(struct isp_video_queue *queue);
+int omap3isp_video_queue_mmap(struct isp_video_queue *queue,
+ struct vm_area_struct *vma);
+unsigned int omap3isp_video_queue_poll(struct isp_video_queue *queue,
+ struct file *file, poll_table *wait);
+
+#endif /* OMAP3_ISP_QUEUE_H */
diff --git a/drivers/media/video/omap3-isp/ispvideo.c b/drivers/media/video/omap3-isp/ispvideo.c
new file mode 100644
index 0000000..517a24d
--- /dev/null
+++ b/drivers/media/video/omap3-isp/ispvideo.c
@@ -0,0 +1,1264 @@
+/*
+ * ispvideo.c
+ *
+ * TI OMAP3 ISP - Generic video node
+ *
+ * Copyright (C) 2009-2010 Nokia Corporation
+ *
+ * Contacts: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
+ * Sakari Ailus <sakari.ailus@xxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <asm/cacheflush.h>
+#include <linux/clk.h>
+#include <linux/mm.h>
+#include <linux/pagemap.h>
+#include <linux/scatterlist.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-ioctl.h>
+#include <plat/iommu.h>
+#include <plat/iovmm.h>
+#include <plat/omap-pm.h>
+
+#include "ispvideo.h"
+#include "isp.h"
+
+
+/* -----------------------------------------------------------------------------
+ * Helper functions
+ */
+
+static struct isp_format_info formats[] = {
+ { V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8,
+ V4L2_MBUS_FMT_Y8_1X8, V4L2_PIX_FMT_GREY, 8, },
+ { V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8,
+ V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_PIX_FMT_SGRBG10DPCM8, 8, },
+ { V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR10_1X10,
+ V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_PIX_FMT_SBGGR10, 10, },
+ { V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG10_1X10,
+ V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_PIX_FMT_SGBRG10, 10, },
+ { V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG10_1X10,
+ V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_PIX_FMT_SGRBG10, 10, },
+ { V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB10_1X10,
+ V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_PIX_FMT_SRGGB10, 10, },
+ { V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR10_1X10,
+ V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_PIX_FMT_SBGGR12, 12, },
+ { V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG10_1X10,
+ V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_PIX_FMT_SGBRG12, 12, },
+ { V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG10_1X10,
+ V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_PIX_FMT_SGRBG12, 12, },
+ { V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB10_1X10,
+ V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_PIX_FMT_SRGGB12, 12, },
+ { V4L2_MBUS_FMT_UYVY8_1X16, V4L2_MBUS_FMT_UYVY8_1X16,
+ V4L2_MBUS_FMT_UYVY8_1X16, V4L2_PIX_FMT_UYVY, 16, },
+ { V4L2_MBUS_FMT_YUYV8_1X16, V4L2_MBUS_FMT_YUYV8_1X16,
+ V4L2_MBUS_FMT_YUYV8_1X16, V4L2_PIX_FMT_YUYV, 16, },
+};
+
+const struct isp_format_info *
+omap3isp_video_format_info(enum v4l2_mbus_pixelcode code)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(formats); ++i) {
+ if (formats[i].code == code)
+ return &formats[i];
+ }
+
+ return NULL;
+}
+
+/*
+ * isp_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format
+ * @video: ISP video instance
+ * @mbus: v4l2_mbus_framefmt format (input)
+ * @pix: v4l2_pix_format format (output)
+ *
+ * Fill the output pix structure with information from the input mbus format.
+ * The bytesperline and sizeimage fields are computed from the requested bytes
+ * per line value in the pix format and information from the video instance.
+ *
+ * Return the number of padding bytes at end of line.
+ */
+static unsigned int isp_video_mbus_to_pix(const struct isp_video *video,
+ const struct v4l2_mbus_framefmt *mbus,
+ struct v4l2_pix_format *pix)
+{
+ unsigned int bpl = pix->bytesperline;
+ unsigned int min_bpl;
+ unsigned int i;
+
+ memset(pix, 0, sizeof(*pix));
+ pix->width = mbus->width;
+ pix->height = mbus->height;
+
+ for (i = 0; i < ARRAY_SIZE(formats); ++i) {
+ if (formats[i].code == mbus->code)
+ break;
+ }
+
+ if (WARN_ON(i == ARRAY_SIZE(formats)))
+ return 0;
+
+ min_bpl = pix->width * ALIGN(formats[i].bpp, 8) / 8;
+
+ /* Clamp the requested bytes per line value. If the maximum bytes per
+ * line value is zero, the module doesn't support user configurable line
+ * sizes. Override the requested value with the minimum in that case.
+ */
+ if (video->bpl_max)
+ bpl = clamp(bpl, min_bpl, video->bpl_max);
+ else
+ bpl = min_bpl;
+
+ if (!video->bpl_zero_padding || bpl != min_bpl)
+ bpl = ALIGN(bpl, video->bpl_alignment);
+
+ pix->pixelformat = formats[i].pixelformat;
+ pix->bytesperline = bpl;
+ pix->sizeimage = pix->bytesperline * pix->height;
+ pix->colorspace = mbus->colorspace;
+ pix->field = mbus->field;
+
+ return bpl - min_bpl;
+}
+
+static void isp_video_pix_to_mbus(const struct v4l2_pix_format *pix,
+ struct v4l2_mbus_framefmt *mbus)
+{
+ unsigned int i;
+
+ memset(mbus, 0, sizeof(*mbus));
+ mbus->width = pix->width;
+ mbus->height = pix->height;
+
+ for (i = 0; i < ARRAY_SIZE(formats); ++i) {
+ if (formats[i].pixelformat == pix->pixelformat)
+ break;
+ }
+
+ if (WARN_ON(i == ARRAY_SIZE(formats)))
+ return;
+
+ mbus->code = formats[i].code;
+ mbus->colorspace = pix->colorspace;
+ mbus->field = pix->field;
+}
+
+static struct v4l2_subdev *
+isp_video_remote_subdev(struct isp_video *video, u32 *pad)
+{
+ struct media_pad *remote;
+
+ remote = media_entity_remote_source(&video->pad);
+
+ if (remote == NULL ||
+ media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
+ return NULL;
+
+ if (pad)
+ *pad = remote->index;
+
+ return media_entity_to_v4l2_subdev(remote->entity);
+}
+
+/* Return a pointer to the ISP video instance at the far end of the pipeline. */
+static struct isp_video *
+isp_video_far_end(struct isp_video *video)
+{
+ struct media_entity_graph graph;
+ struct media_entity *entity = &video->video.entity;
+ struct media_device *mdev = entity->parent;
+ struct isp_video *far_end = NULL;
+
+ mutex_lock(&mdev->graph_mutex);
+ media_entity_graph_walk_start(&graph, entity);
+
+ while ((entity = media_entity_graph_walk_next(&graph))) {
+ if (entity == &video->video.entity)
+ continue;
+
+ if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
+ continue;
+
+ far_end = to_isp_video(media_entity_to_video_device(entity));
+ if (far_end->type != video->type)
+ break;
+
+ far_end = NULL;
+ }
+
+ mutex_unlock(&mdev->graph_mutex);
+ return far_end;
+}
+
+/*
+ * Validate a pipeline by checking both ends of all links for format
+ * discrepancies.
+ *
+ * Compute the minimum time per frame value as the maximum of time per frame
+ * limits reported by every block in the pipeline.
+ *
+ * Return 0 if all formats match, or -EPIPE if at least one link is found with
+ * different formats on its two ends.
+ */
+static int isp_video_validate_pipeline(struct isp_pipeline *pipe)
+{
+ struct isp_device *isp = pipe->output->isp;
+ struct v4l2_subdev_format fmt_source;
+ struct v4l2_subdev_format fmt_sink;
+ struct media_pad *pad;
+ struct v4l2_subdev *subdev;
+ int ret;
+
+ pipe->max_rate = pipe->l3_ick;
+
+ subdev = isp_video_remote_subdev(pipe->output, NULL);
+ if (subdev == NULL)
+ return -EPIPE;
+
+ while (1) {
+ /* Retrieve the sink format */
+ pad = &subdev->entity.pads[0];
+ if (!(pad->flags & MEDIA_PAD_FL_SINK))
+ break;
+
+ fmt_sink.pad = pad->index;
+ fmt_sink.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt_sink);
+ if (ret < 0 && ret != -ENOIOCTLCMD)
+ return -EPIPE;
+
+ /* Update the maximum frame rate */
+ if (subdev == &isp->isp_res.subdev)
+ omap3isp_resizer_max_rate(&isp->isp_res,
+ &pipe->max_rate);
+
+ /* Check ccdc maximum data rate when data comes from sensor
+ * TODO: Include ccdc rate in pipe->max_rate and compare the
+ * total pipe rate with the input data rate from sensor.
+ */
+ if (subdev == &isp->isp_ccdc.subdev && pipe->input == NULL) {
+ unsigned int rate = UINT_MAX;
+
+ omap3isp_ccdc_max_rate(&isp->isp_ccdc, &rate);
+ if (isp->isp_ccdc.vpcfg.pixelclk > rate)
+ return -ENOSPC;
+ }
+
+ /* Retrieve the source format */
+ pad = media_entity_remote_source(pad);
+ if (pad == NULL ||
+ media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
+ break;
+
+ subdev = media_entity_to_v4l2_subdev(pad->entity);
+
+ fmt_source.pad = pad->index;
+ fmt_source.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt_source);
+ if (ret < 0 && ret != -ENOIOCTLCMD)
+ return -EPIPE;
+
+ /* Check if the two ends match */
+ if (fmt_source.format.code != fmt_sink.format.code ||
+ fmt_source.format.width != fmt_sink.format.width ||
+ fmt_source.format.height != fmt_sink.format.height)
+ return -EPIPE;
+ }
+
+ return 0;
+}
+
+static int
+__isp_video_get_format(struct isp_video *video, struct v4l2_format *format)
+{
+ struct v4l2_subdev_format fmt;
+ struct v4l2_subdev *subdev;
+ u32 pad;
+ int ret;
+
+ subdev = isp_video_remote_subdev(video, &pad);
+ if (subdev == NULL)
+ return -EINVAL;
+
+ mutex_lock(&video->mutex);
+
+ fmt.pad = pad;
+ fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
+ if (ret == -ENOIOCTLCMD)
+ ret = -EINVAL;
+
+ mutex_unlock(&video->mutex);
+
+ if (ret)
+ return ret;
+
+ format->type = video->type;
+ return isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
+}
+
+static int
+isp_video_check_format(struct isp_video *video, struct isp_video_fh *vfh)
+{
+ struct v4l2_format format;
+ int ret;
+
+ memcpy(&format, &vfh->format, sizeof(format));
+ ret = __isp_video_get_format(video, &format);
+ if (ret < 0)
+ return ret;
+
+ if (vfh->format.fmt.pix.pixelformat != format.fmt.pix.pixelformat ||
+ vfh->format.fmt.pix.height != format.fmt.pix.height ||
+ vfh->format.fmt.pix.width != format.fmt.pix.width ||
+ vfh->format.fmt.pix.bytesperline != format.fmt.pix.bytesperline ||
+ vfh->format.fmt.pix.sizeimage != format.fmt.pix.sizeimage)
+ return -EINVAL;
+
+ return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * IOMMU management
+ */
+
+#define IOMMU_FLAG (IOVMF_ENDIAN_LITTLE | IOVMF_ELSZ_8)
+
+/*
+ * ispmmu_vmap - Wrapper for Virtual memory mapping of a scatter gather list
+ * @dev: Device pointer specific to the OMAP3 ISP.
+ * @sglist: Pointer to source Scatter gather list to allocate.
+ * @sglen: Number of elements of the scatter-gatter list.
+ *
+ * Returns a resulting mapped device address by the ISP MMU, or -ENOMEM if
+ * we ran out of memory.
+ */
+static dma_addr_t
+ispmmu_vmap(struct isp_device *isp, const struct scatterlist *sglist, int sglen)
+{
+ struct sg_table *sgt;
+ u32 da;
+
+ sgt = kmalloc(sizeof(*sgt), GFP_KERNEL);
+ if (sgt == NULL)
+ return -ENOMEM;
+
+ sgt->sgl = (struct scatterlist *)sglist;
+ sgt->nents = sglen;
+ sgt->orig_nents = sglen;
+
+ da = iommu_vmap(isp->iommu, 0, sgt, IOMMU_FLAG);
+ if (IS_ERR_VALUE(da))
+ kfree(sgt);
+
+ return da;
+}
+
+/*
+ * ispmmu_vunmap - Unmap a device address from the ISP MMU
+ * @dev: Device pointer specific to the OMAP3 ISP.
+ * @da: Device address generated from a ispmmu_vmap call.
+ */
+static void ispmmu_vunmap(struct isp_device *isp, dma_addr_t da)
+{
+ struct sg_table *sgt;
+
+ sgt = iommu_vunmap(isp->iommu, (u32)da);
+ kfree(sgt);
+}
+
+/* -----------------------------------------------------------------------------
+ * Video queue operations
+ */
+
+static void isp_video_queue_prepare(struct isp_video_queue *queue,
+ unsigned int *nbuffers, unsigned int *size)
+{
+ struct isp_video_fh *vfh =
+ container_of(queue, struct isp_video_fh, queue);
+ struct isp_video *video = vfh->video;
+
+ *size = vfh->format.fmt.pix.sizeimage;
+ if (*size == 0)
+ return;
+
+ *nbuffers = min(*nbuffers, video->capture_mem / PAGE_ALIGN(*size));
+}
+
+static void isp_video_buffer_cleanup(struct isp_video_buffer *buf)
+{
+ struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
+ struct isp_buffer *buffer = to_isp_buffer(buf);
+ struct isp_video *video = vfh->video;
+
+ if (buffer->isp_addr) {
+ ispmmu_vunmap(video->isp, buffer->isp_addr);
+ buffer->isp_addr = 0;
+ }
+}
+
+static int isp_video_buffer_prepare(struct isp_video_buffer *buf)
+{
+ struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
+ struct isp_buffer *buffer = to_isp_buffer(buf);
+ struct isp_video *video = vfh->video;
+ unsigned long addr;
+
+ addr = ispmmu_vmap(video->isp, buf->sglist, buf->sglen);
+ if (IS_ERR_VALUE(addr))
+ return -EIO;
+
+ if (!IS_ALIGNED(addr, 32)) {
+ dev_dbg(video->isp->dev, "Buffer address must be "
+ "aligned to 32 bytes boundary.\n");
+ ispmmu_vunmap(video->isp, buffer->isp_addr);
+ return -EINVAL;
+ }
+
+ buf->vbuf.bytesused = vfh->format.fmt.pix.sizeimage;
+ buffer->isp_addr = addr;
+ return 0;
+}
+
+/*
+ * isp_video_buffer_queue - Add buffer to streaming queue
+ * @buf: Video buffer
+ *
+ * In memory-to-memory mode, start streaming on the pipeline if buffers are
+ * queued on both the input and the output, if the pipeline isn't already busy.
+ * If the pipeline is busy, it will be restarted in the output module interrupt
+ * handler.
+ */
+static void isp_video_buffer_queue(struct isp_video_buffer *buf)
+{
+ struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
+ struct isp_buffer *buffer = to_isp_buffer(buf);
+ struct isp_video *video = vfh->video;
+ struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
+ enum isp_pipeline_state state;
+ unsigned long flags;
+ unsigned int empty;
+ unsigned int start;
+
+ empty = list_empty(&video->dmaqueue);
+ list_add_tail(&buffer->buffer.irqlist, &video->dmaqueue);
+
+ if (empty) {
+ if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ state = ISP_PIPELINE_QUEUE_OUTPUT;
+ else
+ state = ISP_PIPELINE_QUEUE_INPUT;
+
+ spin_lock_irqsave(&pipe->lock, flags);
+ pipe->state |= state;
+ video->ops->queue(video, buffer);
+ video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
+
+ start = isp_pipeline_ready(pipe);
+ if (start)
+ pipe->state |= ISP_PIPELINE_STREAM;
+ spin_unlock_irqrestore(&pipe->lock, flags);
+
+ if (start)
+ omap3isp_pipeline_set_stream(pipe,
+ ISP_PIPELINE_STREAM_SINGLESHOT);
+ }
+}
+
+static const struct isp_video_queue_operations isp_video_queue_ops = {
+ .queue_prepare = &isp_video_queue_prepare,
+ .buffer_prepare = &isp_video_buffer_prepare,
+ .buffer_queue = &isp_video_buffer_queue,
+ .buffer_cleanup = &isp_video_buffer_cleanup,
+};
+
+/*
+ * omap3isp_video_buffer_next - Complete the current buffer and return the next
+ * @video: ISP video object
+ * @error: Whether an error occured during capture
+ *
+ * Remove the current video buffer from the DMA queue and fill its timestamp,
+ * field count and state fields before waking up its completion handler.
+ *
+ * The buffer state is set to VIDEOBUF_DONE if no error occured (@error is 0)
+ * or VIDEOBUF_ERROR otherwise (@error is non-zero).
+ *
+ * The DMA queue is expected to contain at least one buffer.
+ *
+ * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is
+ * empty.
+ */
+struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video,
+ unsigned int error)
+{
+ struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
+ struct isp_video_queue *queue = video->queue;
+ enum isp_pipeline_state state;
+ struct isp_video_buffer *buf;
+ unsigned long flags;
+ struct timespec ts;
+
+ spin_lock_irqsave(&queue->irqlock, flags);
+ if (WARN_ON(list_empty(&video->dmaqueue))) {
+ spin_unlock_irqrestore(&queue->irqlock, flags);
+ return NULL;
+ }
+
+ buf = list_first_entry(&video->dmaqueue, struct isp_video_buffer,
+ irqlist);
+ list_del(&buf->irqlist);
+ spin_unlock_irqrestore(&queue->irqlock, flags);
+
+ ktime_get_ts(&ts);
+ buf->vbuf.timestamp.tv_sec = ts.tv_sec;
+ buf->vbuf.timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
+
+ /* Do frame number propagation only if this is the output video node.
+ * Frame number either comes from the CSI receivers or it gets
+ * incremented here if H3A is not active.
+ * Note: There is no guarantee that the output buffer will finish
+ * first, so the input number might lag behind by 1 in some cases.
+ */
+ if (video == pipe->output && !pipe->do_propagation)
+ buf->vbuf.sequence = atomic_inc_return(&pipe->frame_number);
+ else
+ buf->vbuf.sequence = atomic_read(&pipe->frame_number);
+
+ buf->state = error ? ISP_BUF_STATE_ERROR : ISP_BUF_STATE_DONE;
+
+ wake_up(&buf->wait);
+
+ if (list_empty(&video->dmaqueue)) {
+ if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ state = ISP_PIPELINE_QUEUE_OUTPUT
+ | ISP_PIPELINE_STREAM;
+ else
+ state = ISP_PIPELINE_QUEUE_INPUT
+ | ISP_PIPELINE_STREAM;
+
+ spin_lock_irqsave(&pipe->lock, flags);
+ pipe->state &= ~state;
+ if (video->pipe.stream_state == ISP_PIPELINE_STREAM_CONTINUOUS)
+ video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
+ spin_unlock_irqrestore(&pipe->lock, flags);
+ return NULL;
+ }
+
+ if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) {
+ spin_lock_irqsave(&pipe->lock, flags);
+ pipe->state &= ~ISP_PIPELINE_STREAM;
+ spin_unlock_irqrestore(&pipe->lock, flags);
+ }
+
+ buf = list_first_entry(&video->dmaqueue, struct isp_video_buffer,
+ irqlist);
+ buf->state = ISP_BUF_STATE_ACTIVE;
+ return to_isp_buffer(buf);
+}
+
+/*
+ * omap3isp_video_resume - Perform resume operation on the buffers
+ * @video: ISP video object
+ * @continuous: Pipeline is in single shot mode if 0 or continous mode otherwise
+ *
+ * This function is intended to be used on suspend/resume scenario. It
+ * requests video queue layer to discard buffers marked as DONE if it's in
+ * continuous mode and requests ISP modules to queue again the ACTIVE buffer
+ * if there's any.
+ */
+void omap3isp_video_resume(struct isp_video *video, int continuous)
+{
+ struct isp_buffer *buf = NULL;
+
+ if (continuous && video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ omap3isp_video_queue_discard_done(video->queue);
+
+ if (!list_empty(&video->dmaqueue)) {
+ buf = list_first_entry(&video->dmaqueue,
+ struct isp_buffer, buffer.irqlist);
+ video->ops->queue(video, buf);
+ video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
+ } else {
+ if (continuous)
+ video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
+ }
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 ioctls
+ */
+
+static int
+isp_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
+{
+ struct isp_video *video = video_drvdata(file);
+
+ strlcpy(cap->driver, ISP_VIDEO_DRIVER_NAME, sizeof(cap->driver));
+ strlcpy(cap->card, video->video.name, sizeof(cap->card));
+ strlcpy(cap->bus_info, "media", sizeof(cap->bus_info));
+ cap->version = ISP_VIDEO_DRIVER_VERSION;
+
+ if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
+ else
+ cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
+
+ return 0;
+}
+
+static int
+isp_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
+{
+ struct isp_video_fh *vfh = to_isp_video_fh(fh);
+ struct isp_video *video = video_drvdata(file);
+
+ if (format->type != video->type)
+ return -EINVAL;
+
+ mutex_lock(&video->mutex);
+ *format = vfh->format;
+ mutex_unlock(&video->mutex);
+
+ return 0;
+}
+
+static int
+isp_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
+{
+ struct isp_video_fh *vfh = to_isp_video_fh(fh);
+ struct isp_video *video = video_drvdata(file);
+ struct v4l2_mbus_framefmt fmt;
+
+ if (format->type != video->type)
+ return -EINVAL;
+
+ mutex_lock(&video->mutex);
+
+ /* Fill the bytesperline and sizeimage fields by converting to media bus
+ * format and back to pixel format.
+ */
+ isp_video_pix_to_mbus(&format->fmt.pix, &fmt);
+ isp_video_mbus_to_pix(video, &fmt, &format->fmt.pix);
+
+ vfh->format = *format;
+
+ mutex_unlock(&video->mutex);
+ return 0;
+}
+
+static int
+isp_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
+{
+ struct isp_video *video = video_drvdata(file);
+ struct v4l2_subdev_format fmt;
+ struct v4l2_subdev *subdev;
+ u32 pad;
+ int ret;
+
+ if (format->type != video->type)
+ return -EINVAL;
+
+ subdev = isp_video_remote_subdev(video, &pad);
+ if (subdev == NULL)
+ return -EINVAL;
+
+ isp_video_pix_to_mbus(&format->fmt.pix, &fmt.format);
+
+ fmt.pad = pad;
+ fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
+ if (ret)
+ return ret == -ENOIOCTLCMD ? -EINVAL : ret;
+
+ isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
+ return 0;
+}
+
+static int
+isp_video_cropcap(struct file *file, void *fh, struct v4l2_cropcap *cropcap)
+{
+ struct isp_video *video = video_drvdata(file);
+ struct v4l2_subdev *subdev;
+ int ret;
+
+ subdev = isp_video_remote_subdev(video, NULL);
+ if (subdev == NULL)
+ return -EINVAL;
+
+ mutex_lock(&video->mutex);
+ ret = v4l2_subdev_call(subdev, video, cropcap, cropcap);
+ mutex_unlock(&video->mutex);
+
+ return ret == -ENOIOCTLCMD ? -EINVAL : ret;
+}
+
+static int
+isp_video_get_crop(struct file *file, void *fh, struct v4l2_crop *crop)
+{
+ struct isp_video *video = video_drvdata(file);
+ struct v4l2_subdev_format format;
+ struct v4l2_subdev *subdev;
+ u32 pad;
+ int ret;
+
+ subdev = isp_video_remote_subdev(video, &pad);
+ if (subdev == NULL)
+ return -EINVAL;
+
+ /* Try the get crop operation first and fallback to get format if not
+ * implemented.
+ */
+ ret = v4l2_subdev_call(subdev, video, g_crop, crop);
+ if (ret != -ENOIOCTLCMD)
+ return ret;
+
+ format.pad = pad;
+ format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format);
+ if (ret < 0)
+ return ret == -ENOIOCTLCMD ? -EINVAL : ret;
+
+ crop->c.left = 0;
+ crop->c.top = 0;
+ crop->c.width = format.format.width;
+ crop->c.height = format.format.height;
+
+ return 0;
+}
+
+static int
+isp_video_set_crop(struct file *file, void *fh, struct v4l2_crop *crop)
+{
+ struct isp_video *video = video_drvdata(file);
+ struct v4l2_subdev *subdev;
+ int ret;
+
+ subdev = isp_video_remote_subdev(video, NULL);
+ if (subdev == NULL)
+ return -EINVAL;
+
+ mutex_lock(&video->mutex);
+ ret = v4l2_subdev_call(subdev, video, s_crop, crop);
+ mutex_unlock(&video->mutex);
+
+ return ret == -ENOIOCTLCMD ? -EINVAL : ret;
+}
+
+static int
+isp_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a)
+{
+ struct isp_video_fh *vfh = to_isp_video_fh(fh);
+ struct isp_video *video = video_drvdata(file);
+
+ if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
+ video->type != a->type)
+ return -EINVAL;
+
+ memset(a, 0, sizeof(*a));
+ a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+ a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
+ a->parm.output.timeperframe = vfh->timeperframe;
+
+ return 0;
+}
+
+static int
+isp_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a)
+{
+ struct isp_video_fh *vfh = to_isp_video_fh(fh);
+ struct isp_video *video = video_drvdata(file);
+
+ if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
+ video->type != a->type)
+ return -EINVAL;
+
+ if (a->parm.output.timeperframe.denominator == 0)
+ a->parm.output.timeperframe.denominator = 1;
+
+ vfh->timeperframe = a->parm.output.timeperframe;
+
+ return 0;
+}
+
+static int
+isp_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb)
+{
+ struct isp_video_fh *vfh = to_isp_video_fh(fh);
+
+ return omap3isp_video_queue_reqbufs(&vfh->queue, rb);
+}
+
+static int
+isp_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b)
+{
+ struct isp_video_fh *vfh = to_isp_video_fh(fh);
+
+ return omap3isp_video_queue_querybuf(&vfh->queue, b);
+}
+
+static int
+isp_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
+{
+ struct isp_video_fh *vfh = to_isp_video_fh(fh);
+
+ return omap3isp_video_queue_qbuf(&vfh->queue, b);
+}
+
+static int
+isp_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
+{
+ struct isp_video_fh *vfh = to_isp_video_fh(fh);
+
+ return omap3isp_video_queue_dqbuf(&vfh->queue, b,
+ file->f_flags & O_NONBLOCK);
+}
+
+/*
+ * Stream management
+ *
+ * Every ISP pipeline has a single input and a single output. The input can be
+ * either a sensor or a video node. The output is always a video node.
+ *
+ * As every pipeline has an output video node, the ISP video objects at the
+ * pipeline output stores the pipeline state. It tracks the streaming state of
+ * both the input and output, as well as the availability of buffers.
+ *
+ * In sensor-to-memory mode, frames are always available at the pipeline input.
+ * Starting the sensor usually requires I2C transfers and must be done in
+ * interruptible context. The pipeline is started and stopped synchronously
+ * to the stream on/off commands. All modules in the pipeline will get their
+ * subdev set stream handler called. The module at the end of the pipeline must
+ * delay starting the hardware until buffers are available at its output.
+ *
+ * In memory-to-memory mode, starting/stopping the stream requires
+ * synchronization between the input and output. ISP modules can't be stopped
+ * in the middle of a frame, and at least some of the modules seem to become
+ * busy as soon as they're started, even if they don't receive a frame start
+ * event. For that reason frames need to be processed in single-shot mode. The
+ * driver needs to wait until a frame is completely processed and written to
+ * memory before restarting the pipeline for the next frame. Pipelined
+ * processing might be possible but requires more testing.
+ *
+ * Stream start must be delayed until buffers are available at both the input
+ * and output. The pipeline must be started in the videobuf queue callback with
+ * the buffers queue spinlock held. The modules subdev set stream operation must
+ * not sleep.
+ */
+static int
+isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
+{
+ struct isp_video_fh *vfh = to_isp_video_fh(fh);
+ struct isp_video *video = video_drvdata(file);
+ enum isp_pipeline_state state;
+ struct isp_pipeline *pipe;
+ struct isp_video *far_end;
+ unsigned long flags;
+ int ret;
+
+ if (type != video->type)
+ return -EINVAL;
+
+ mutex_lock(&video->stream_lock);
+
+ if (video->streaming) {
+ mutex_unlock(&video->stream_lock);
+ return -EBUSY;
+ }
+
+ /* Start streaming on the pipeline. No link touching an entity in the
+ * pipeline can be activated or deactivated once streaming is started.
+ */
+ pipe = video->video.entity.pipe
+ ? to_isp_pipeline(&video->video.entity) : &video->pipe;
+ media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
+
+ /* Verify that the currently configured format matches the output of
+ * the connected subdev.
+ */
+ ret = isp_video_check_format(video, vfh);
+ if (ret < 0)
+ goto error;
+
+ video->bpl_padding = ret;
+ video->bpl_value = vfh->format.fmt.pix.bytesperline;
+
+ /* Find the ISP video node connected at the far end of the pipeline and
+ * update the pipeline.
+ */
+ far_end = isp_video_far_end(video);
+
+ if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+ state = ISP_PIPELINE_STREAM_OUTPUT | ISP_PIPELINE_IDLE_OUTPUT;
+ pipe->input = far_end;
+ pipe->output = video;
+ } else {
+ if (far_end == NULL) {
+ ret = -EPIPE;
+ goto error;
+ }
+
+ state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_IDLE_INPUT;
+ pipe->input = video;
+ pipe->output = far_end;
+ }
+
+ /* Make sure the interconnect clock runs fast enough.
+ *
+ * Formula from: resource34xx.c set_opp()
+ * If MPU freq is above 500MHz, make sure the interconnect
+ * is at 100Mhz or above.
+ * throughput in KiB/s for 100 Mhz = 100 * 1000 * 4.
+ *
+ * We want to be fast enough then set OCP clock to be max as
+ * possible, in that case 185Mhz then:
+ * throughput in KiB/s for 185Mhz = 185 * 1000 * 4 = 740000 KiB/s
+ */
+ omap_pm_set_min_bus_tput(video->isp->dev, OCP_INITIATOR_AGENT, 740000);
+ pipe->l3_ick = clk_get_rate(video->isp->clock[ISP_CLK_L3_ICK]);
+
+ /* Validate the pipeline and update its state. */
+ ret = isp_video_validate_pipeline(pipe);
+ if (ret < 0)
+ goto error;
+
+ spin_lock_irqsave(&pipe->lock, flags);
+ pipe->state &= ~ISP_PIPELINE_STREAM;
+ pipe->state |= state;
+ spin_unlock_irqrestore(&pipe->lock, flags);
+
+ /* Set the maximum time per frame as the value requested by userspace.
+ * This is a soft limit that can be overridden if the hardware doesn't
+ * support the request limit.
+ */
+ if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
+ pipe->max_timeperframe = vfh->timeperframe;
+
+ video->queue = &vfh->queue;
+ INIT_LIST_HEAD(&video->dmaqueue);
+ atomic_set(&pipe->frame_number, -1);
+
+ ret = omap3isp_video_queue_streamon(&vfh->queue);
+ if (ret < 0)
+ goto error;
+
+ /* In sensor-to-memory mode, the stream can be started synchronously
+ * to the stream on command. In memory-to-memory mode, it will be
+ * started when buffers are queued on both the input and output.
+ */
+ if (pipe->input == NULL) {
+ ret = omap3isp_pipeline_set_stream(pipe,
+ ISP_PIPELINE_STREAM_CONTINUOUS);
+ if (ret < 0)
+ goto error;
+ spin_lock_irqsave(&video->queue->irqlock, flags);
+ if (list_empty(&video->dmaqueue))
+ video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
+ spin_unlock_irqrestore(&video->queue->irqlock, flags);
+ }
+
+error:
+ if (ret < 0) {
+ omap3isp_video_queue_streamoff(&vfh->queue);
+ omap_pm_set_min_bus_tput(video->isp->dev,
+ OCP_INITIATOR_AGENT, 0);
+ media_entity_pipeline_stop(&video->video.entity);
+ video->queue = NULL;
+ }
+
+ if (!ret)
+ video->streaming = 1;
+
+ mutex_unlock(&video->stream_lock);
+ return ret;
+}
+
+static int
+isp_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
+{
+ struct isp_video_fh *vfh = to_isp_video_fh(fh);
+ struct isp_video *video = video_drvdata(file);
+ struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
+ enum isp_pipeline_state state;
+ unsigned int streaming;
+ unsigned long flags;
+
+ if (type != video->type)
+ return -EINVAL;
+
+ mutex_lock(&video->stream_lock);
+
+ /* Make sure we're not streaming yet. */
+ mutex_lock(&vfh->queue.lock);
+ streaming = vfh->queue.streaming;
+ mutex_unlock(&vfh->queue.lock);
+
+ if (!streaming)
+ goto done;
+
+ /* Update the pipeline state. */
+ if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ state = ISP_PIPELINE_STREAM_OUTPUT
+ | ISP_PIPELINE_QUEUE_OUTPUT;
+ else
+ state = ISP_PIPELINE_STREAM_INPUT
+ | ISP_PIPELINE_QUEUE_INPUT;
+
+ spin_lock_irqsave(&pipe->lock, flags);
+ pipe->state &= ~state;
+ spin_unlock_irqrestore(&pipe->lock, flags);
+
+ /* Stop the stream. */
+ omap3isp_pipeline_set_stream(pipe, ISP_PIPELINE_STREAM_STOPPED);
+ omap3isp_video_queue_streamoff(&vfh->queue);
+ video->queue = NULL;
+ video->streaming = 0;
+
+ omap_pm_set_min_bus_tput(video->isp->dev, OCP_INITIATOR_AGENT, 0);
+ media_entity_pipeline_stop(&video->video.entity);
+
+done:
+ mutex_unlock(&video->stream_lock);
+ return 0;
+}
+
+static int
+isp_video_enum_input(struct file *file, void *fh, struct v4l2_input *input)
+{
+ if (input->index > 0)
+ return -EINVAL;
+
+ strlcpy(input->name, "camera", sizeof(input->name));
+ input->type = V4L2_INPUT_TYPE_CAMERA;
+
+ return 0;
+}
+
+static int
+isp_video_g_input(struct file *file, void *fh, unsigned int *input)
+{
+ *input = 0;
+
+ return 0;
+}
+
+static int
+isp_video_s_input(struct file *file, void *fh, unsigned int input)
+{
+ return input == 0 ? 0 : -EINVAL;
+}
+
+static const struct v4l2_ioctl_ops isp_video_ioctl_ops = {
+ .vidioc_querycap = isp_video_querycap,
+ .vidioc_g_fmt_vid_cap = isp_video_get_format,
+ .vidioc_s_fmt_vid_cap = isp_video_set_format,
+ .vidioc_try_fmt_vid_cap = isp_video_try_format,
+ .vidioc_g_fmt_vid_out = isp_video_get_format,
+ .vidioc_s_fmt_vid_out = isp_video_set_format,
+ .vidioc_try_fmt_vid_out = isp_video_try_format,
+ .vidioc_cropcap = isp_video_cropcap,
+ .vidioc_g_crop = isp_video_get_crop,
+ .vidioc_s_crop = isp_video_set_crop,
+ .vidioc_g_parm = isp_video_get_param,
+ .vidioc_s_parm = isp_video_set_param,
+ .vidioc_reqbufs = isp_video_reqbufs,
+ .vidioc_querybuf = isp_video_querybuf,
+ .vidioc_qbuf = isp_video_qbuf,
+ .vidioc_dqbuf = isp_video_dqbuf,
+ .vidioc_streamon = isp_video_streamon,
+ .vidioc_streamoff = isp_video_streamoff,
+ .vidioc_enum_input = isp_video_enum_input,
+ .vidioc_g_input = isp_video_g_input,
+ .vidioc_s_input = isp_video_s_input,
+};
+
+/* -----------------------------------------------------------------------------
+ * V4L2 file operations
+ */
+
+static int isp_video_open(struct file *file)
+{
+ struct isp_video *video = video_drvdata(file);
+ struct isp_video_fh *handle;
+ int ret = 0;
+
+ handle = kzalloc(sizeof(*handle), GFP_KERNEL);
+ if (handle == NULL)
+ return -ENOMEM;
+
+ v4l2_fh_init(&handle->vfh, &video->video);
+ v4l2_fh_add(&handle->vfh);
+
+ /* If this is the first user, initialise the pipeline. */
+ if (omap3isp_get(video->isp) == NULL) {
+ ret = -EBUSY;
+ goto done;
+ }
+
+ ret = omap3isp_pipeline_pm_use(&video->video.entity, 1);
+ if (ret < 0) {
+ omap3isp_put(video->isp);
+ goto done;
+ }
+
+ omap3isp_video_queue_init(&handle->queue, video->type,
+ &isp_video_queue_ops, video->isp->dev,
+ sizeof(struct isp_buffer));
+
+ memset(&handle->format, 0, sizeof(handle->format));
+ handle->format.type = video->type;
+ handle->timeperframe.denominator = 1;
+
+ handle->video = video;
+ file->private_data = &handle->vfh;
+
+done:
+ if (ret < 0) {
+ v4l2_fh_del(&handle->vfh);
+ kfree(handle);
+ }
+
+ return ret;
+}
+
+static int isp_video_release(struct file *file)
+{
+ struct isp_video *video = video_drvdata(file);
+ struct v4l2_fh *vfh = file->private_data;
+ struct isp_video_fh *handle = to_isp_video_fh(vfh);
+
+ /* Disable streaming and free the buffers queue resources. */
+ isp_video_streamoff(file, vfh, video->type);
+
+ mutex_lock(&handle->queue.lock);
+ omap3isp_video_queue_cleanup(&handle->queue);
+ mutex_unlock(&handle->queue.lock);
+
+ omap3isp_pipeline_pm_use(&video->video.entity, 0);
+
+ /* Release the file handle. */
+ v4l2_fh_del(vfh);
+ kfree(handle);
+ file->private_data = NULL;
+
+ omap3isp_put(video->isp);
+
+ return 0;
+}
+
+static unsigned int isp_video_poll(struct file *file, poll_table *wait)
+{
+ struct isp_video_fh *vfh = to_isp_video_fh(file->private_data);
+ struct isp_video_queue *queue = &vfh->queue;
+
+ return omap3isp_video_queue_poll(queue, file, wait);
+}
+
+static int isp_video_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct isp_video_fh *vfh = to_isp_video_fh(file->private_data);
+
+ return omap3isp_video_queue_mmap(&vfh->queue, vma);
+}
+
+static struct v4l2_file_operations isp_video_fops = {
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = video_ioctl2,
+ .open = isp_video_open,
+ .release = isp_video_release,
+ .poll = isp_video_poll,
+ .mmap = isp_video_mmap,
+};
+
+/* -----------------------------------------------------------------------------
+ * ISP video core
+ */
+
+static const struct isp_video_operations isp_video_dummy_ops = {
+};
+
+int omap3isp_video_init(struct isp_video *video, const char *name)
+{
+ const char *direction;
+ int ret;
+
+ switch (video->type) {
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+ direction = "output";
+ video->pad.flags = MEDIA_PAD_FL_SINK;
+ break;
+ case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+ direction = "input";
+ video->pad.flags = MEDIA_PAD_FL_SOURCE;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ ret = media_entity_init(&video->video.entity, 1, &video->pad, 0);
+ if (ret < 0)
+ return ret;
+
+ mutex_init(&video->mutex);
+ atomic_set(&video->active, 0);
+
+ spin_lock_init(&video->pipe.lock);
+ mutex_init(&video->stream_lock);
+
+ /* Initialize the video device. */
+ if (video->ops == NULL)
+ video->ops = &isp_video_dummy_ops;
+
+ video->video.fops = &isp_video_fops;
+ snprintf(video->video.name, sizeof(video->video.name),
+ "OMAP3 ISP %s %s", name, direction);
+ video->video.vfl_type = VFL_TYPE_GRABBER;
+ video->video.release = video_device_release_empty;
+ video->video.ioctl_ops = &isp_video_ioctl_ops;
+ video->pipe.stream_state = ISP_PIPELINE_STREAM_STOPPED;
+
+ video_set_drvdata(&video->video, video);
+
+ return 0;
+}
+
+int omap3isp_video_register(struct isp_video *video, struct v4l2_device *vdev)
+{
+ int ret;
+
+ video->video.v4l2_dev = vdev;
+
+ ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
+ if (ret < 0)
+ printk(KERN_ERR "%s: could not register video device (%d)\n",
+ __func__, ret);
+
+ return ret;
+}
+
+void omap3isp_video_unregister(struct isp_video *video)
+{
+ if (video_is_registered(&video->video)) {
+ media_entity_cleanup(&video->video.entity);
+ video_unregister_device(&video->video);
+ }
+}
diff --git a/drivers/media/video/omap3-isp/ispvideo.h b/drivers/media/video/omap3-isp/ispvideo.h
new file mode 100644
index 0000000..e15cdd8
--- /dev/null
+++ b/drivers/media/video/omap3-isp/ispvideo.h
@@ -0,0 +1,202 @@
+/*
+ * ispvideo.h
+ *
+ * TI OMAP3 ISP - Generic video node
+ *
+ * Copyright (C) 2009-2010 Nokia Corporation
+ *
+ * Contacts: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
+ * Sakari Ailus <sakari.ailus@xxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#ifndef OMAP3_ISP_VIDEO_H
+#define OMAP3_ISP_VIDEO_H
+
+#include <linux/v4l2-mediabus.h>
+#include <linux/version.h>
+#include <media/media-entity.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-fh.h>
+
+#include "ispqueue.h"
+
+#define ISP_VIDEO_DRIVER_NAME "ispvideo"
+#define ISP_VIDEO_DRIVER_VERSION KERNEL_VERSION(0, 0, 1)
+
+struct isp_device;
+struct isp_video;
+struct v4l2_mbus_framefmt;
+struct v4l2_pix_format;
+
+/*
+ * struct isp_format_info - ISP media bus format information
+ * @code: V4L2 media bus format code
+ * @truncated: V4L2 media bus format code for the same format truncated to 10
+ * bits. Identical to @code if the format is 10 bits wide or less.
+ * @uncompressed: V4L2 media bus format code for the corresponding uncompressed
+ * format. Identical to @code if the format is not DPCM compressed.
+ * @pixelformat: V4L2 pixel format FCC identifier
+ * @bpp: Bits per pixel
+ */
+struct isp_format_info {
+ enum v4l2_mbus_pixelcode code;
+ enum v4l2_mbus_pixelcode truncated;
+ enum v4l2_mbus_pixelcode uncompressed;
+ u32 pixelformat;
+ unsigned int bpp;
+};
+
+enum isp_pipeline_stream_state {
+ ISP_PIPELINE_STREAM_STOPPED = 0,
+ ISP_PIPELINE_STREAM_CONTINUOUS = 1,
+ ISP_PIPELINE_STREAM_SINGLESHOT = 2,
+};
+
+enum isp_pipeline_state {
+ /* The stream has been started on the input video node. */
+ ISP_PIPELINE_STREAM_INPUT = 1,
+ /* The stream has been started on the output video node. */
+ ISP_PIPELINE_STREAM_OUTPUT = 2,
+ /* At least one buffer is queued on the input video node. */
+ ISP_PIPELINE_QUEUE_INPUT = 4,
+ /* At least one buffer is queued on the output video node. */
+ ISP_PIPELINE_QUEUE_OUTPUT = 8,
+ /* The input entity is idle, ready to be started. */
+ ISP_PIPELINE_IDLE_INPUT = 16,
+ /* The output entity is idle, ready to be started. */
+ ISP_PIPELINE_IDLE_OUTPUT = 32,
+ /* The pipeline is currently streaming. */
+ ISP_PIPELINE_STREAM = 64,
+};
+
+struct isp_pipeline {
+ struct media_pipeline pipe;
+ spinlock_t lock;
+ unsigned int state;
+ enum isp_pipeline_stream_state stream_state;
+ struct isp_video *input;
+ struct isp_video *output;
+ unsigned long l3_ick;
+ unsigned int max_rate;
+ atomic_t frame_number;
+ bool do_propagation; /* of frame number */
+ struct v4l2_fract max_timeperframe;
+};
+
+#define to_isp_pipeline(__e) \
+ container_of((__e)->pipe, struct isp_pipeline, pipe)
+
+static inline int isp_pipeline_ready(struct isp_pipeline *pipe)
+{
+ return pipe->state == (ISP_PIPELINE_STREAM_INPUT |
+ ISP_PIPELINE_STREAM_OUTPUT |
+ ISP_PIPELINE_QUEUE_INPUT |
+ ISP_PIPELINE_QUEUE_OUTPUT |
+ ISP_PIPELINE_IDLE_INPUT |
+ ISP_PIPELINE_IDLE_OUTPUT);
+}
+
+/*
+ * struct isp_buffer - ISP buffer
+ * @buffer: ISP video buffer
+ * @isp_addr: MMU mapped address (a.k.a. device address) of the buffer.
+ */
+struct isp_buffer {
+ struct isp_video_buffer buffer;
+ dma_addr_t isp_addr;
+};
+
+#define to_isp_buffer(buf) container_of(buf, struct isp_buffer, buffer)
+
+enum isp_video_dmaqueue_flags {
+ /* Set if DMA queue becomes empty when ISP_PIPELINE_STREAM_CONTINUOUS */
+ ISP_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0),
+ /* Set when queuing buffer to an empty DMA queue */
+ ISP_VIDEO_DMAQUEUE_QUEUED = (1 << 1),
+};
+
+#define isp_video_dmaqueue_flags_clr(video) \
+ ({ (video)->dmaqueue_flags = 0; })
+
+/*
+ * struct isp_video_operations - ISP video operations
+ * @queue: Resume streaming when a buffer is queued. Called on VIDIOC_QBUF
+ * if there was no buffer previously queued.
+ */
+struct isp_video_operations {
+ int(*queue)(struct isp_video *video, struct isp_buffer *buffer);
+};
+
+struct isp_video {
+ struct video_device video;
+ enum v4l2_buf_type type;
+ struct media_pad pad;
+
+ struct mutex mutex;
+ atomic_t active;
+
+ struct isp_device *isp;
+
+ unsigned int capture_mem;
+ unsigned int bpl_alignment; /* alignment value */
+ unsigned int bpl_zero_padding; /* whether the alignment is optional */
+ unsigned int bpl_max; /* maximum bytes per line value */
+ unsigned int bpl_value; /* bytes per line value */
+ unsigned int bpl_padding; /* padding at end of line */
+
+ /* Entity video node streaming */
+ unsigned int streaming:1;
+
+ /* Pipeline state */
+ struct isp_pipeline pipe;
+ struct mutex stream_lock;
+
+ /* Video buffers queue */
+ struct isp_video_queue *queue;
+ struct list_head dmaqueue;
+ enum isp_video_dmaqueue_flags dmaqueue_flags;
+
+ const struct isp_video_operations *ops;
+};
+
+#define to_isp_video(vdev) container_of(vdev, struct isp_video, video)
+
+struct isp_video_fh {
+ struct v4l2_fh vfh;
+ struct isp_video *video;
+ struct isp_video_queue queue;
+ struct v4l2_format format;
+ struct v4l2_fract timeperframe;
+};
+
+#define to_isp_video_fh(fh) container_of(fh, struct isp_video_fh, vfh)
+#define isp_video_queue_to_isp_video_fh(q) \
+ container_of(q, struct isp_video_fh, queue)
+
+int omap3isp_video_init(struct isp_video *video, const char *name);
+int omap3isp_video_register(struct isp_video *video,
+ struct v4l2_device *vdev);
+void omap3isp_video_unregister(struct isp_video *video);
+struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video,
+ unsigned int error);
+void omap3isp_video_resume(struct isp_video *video, int continuous);
+struct media_pad *omap3isp_video_remote_pad(struct isp_video *video);
+
+const struct isp_format_info *
+omap3isp_video_format_info(enum v4l2_mbus_pixelcode code);
+
+#endif /* OMAP3_ISP_VIDEO_H */
--
1.7.3.4
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
