staging: dt3155v4l syncronize with API changes

dt3155v4l driver, as in -rc6-next-20100506 compiles, but will
not run properly due to recent changes in the videobuf APIs.

This patch synchronizes some functions that have been copied
from drivers/media/video/videobuf-dma-contig.c (and modified)
with the recent (-rc6 -> -rc6-next-) changes in videobuf layer
especially drivers/media/video/videobuf-dma-contig.c

Signed-off-by: Marin Mitov <mitov@issp.bas.bg>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/dt3155v4l/dt3155v4l.c b/drivers/staging/dt3155v4l/dt3155v4l.c
index 881c3e9..b1695ad 100644 (file)
--- a/drivers/staging/dt3155v4l/dt3155v4l.c
+++ b/drivers/staging/dt3155v4l/dt3155v4l.c
@@ -1,3 +1,23 @@
+/***************************************************************************
+ *   Copyright (C) 2006-2010 by Marin Mitov                                *
+ *   mitov@issp.bas.bg                                                     *
+ *                                                                         *
+ *   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.                                   *
+ *                                                                         *
+ *   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.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
 #include <media/v4l2-dev.h>
 #include <media/videobuf-core.h>
 #include <media/v4l2-ioctl.h>
@@ -260,9 +280,11 @@ dt3155_dma_contig_user_get(struct videobuf_dma_contig_memory *mem,
        struct vm_area_struct *vma;
        unsigned long prev_pfn, this_pfn;
        unsigned long pages_done, user_address;
+       unsigned int offset;
        int ret;
 
-       mem->size = PAGE_ALIGN(vb->size);
+       offset = vb->baddr & ~PAGE_MASK;
+       mem->size = PAGE_ALIGN(vb->size + offset);
        mem->is_userptr = 0;
        ret = -EINVAL;
 
@@ -285,7 +307,7 @@ dt3155_dma_contig_user_get(struct videobuf_dma_contig_memory *mem,
                        break;
 
                if (pages_done == 0)
-                       mem->dma_handle = this_pfn << PAGE_SHIFT;
+                       mem->dma_handle = (this_pfn << PAGE_SHIFT) + offset;
                else if (this_pfn != (prev_pfn + 1))
                        ret = -EFAULT;
 
@@ -416,14 +438,14 @@ dt3155_vm_close(struct vm_area_struct *vma)
        struct videobuf_queue *q = map->q;
        int i;
 
-       dev_dbg(map->q->dev, "vm_close %p [count=%u,vma=%08lx-%08lx]\n",
+       dev_dbg(q->dev, "vm_close %p [count=%u,vma=%08lx-%08lx]\n",
                map, map->count, vma->vm_start, vma->vm_end);
 
        map->count--;
        if (0 == map->count) {
                struct videobuf_dma_contig_memory *mem;
 
-               dev_dbg(map->q->dev, "munmap %p q=%p\n", map, q);
+               dev_dbg(q->dev, "munmap %p q=%p\n", map, q);
                mutex_lock(&q->vb_lock);
 
                /* We need first to cancel streams, before unmapping */
@@ -450,7 +472,7 @@ dt3155_vm_close(struct vm_area_struct *vma)
                                /* vfree is not atomic - can't be
                                   called with IRQ's disabled
                                 */
-                               dev_dbg(map->q->dev, "buf[%d] freeing %p\n",
+                               dev_dbg(q->dev, "buf[%d] freeing %p\n",
                                        i, mem->vaddr);
 
                                dt3155_free_buffer(q->dev, mem->size,
@@ -475,51 +497,33 @@ static const struct vm_operations_struct dt3155_vm_ops = {
 
 /* same as videobuf_mmap_mapper(), but allocates from the pool */
 static int
-dt3155_mmap_mapper(struct videobuf_queue *q, struct vm_area_struct *vma)
+dt3155_mmap_mapper(struct videobuf_queue *q, struct videobuf_buffer *buf,
+                                               struct vm_area_struct *vma)
 {
        struct videobuf_dma_contig_memory *mem;
        struct videobuf_mapping *map;
-       unsigned int first;
        int retval;
-       unsigned long size, offset = vma->vm_pgoff << PAGE_SHIFT;
+       unsigned long size;
 
        dev_dbg(q->dev, "%s\n", __func__);
-       if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
-               return -EINVAL;
-
-       /* look for first buffer to map */
-       for (first = 0; first < VIDEO_MAX_FRAME; first++) {
-               if (!q->bufs[first])
-                       continue;
-
-               if (V4L2_MEMORY_MMAP != q->bufs[first]->memory)
-                       continue;
-               if (q->bufs[first]->boff == offset)
-                       break;
-       }
-       if (VIDEO_MAX_FRAME == first) {
-               dev_dbg(q->dev, "invalid user space offset [offset=0x%lx]\n",
-                       offset);
-               return -EINVAL;
-       }
 
        /* create mapping + update buffer list */
        map = kzalloc(sizeof(struct videobuf_mapping), GFP_KERNEL);
        if (!map)
                return -ENOMEM;
 
-       q->bufs[first]->map = map;
+       buf->map = map;
        map->start = vma->vm_start;
        map->end = vma->vm_end;
        map->q = q;
 
-       q->bufs[first]->baddr = vma->vm_start;
+       buf->baddr = vma->vm_start;
 
-       mem = q->bufs[first]->priv;
+       mem = buf->priv;
        BUG_ON(!mem);
        MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
 
-       mem->size = PAGE_ALIGN(q->bufs[first]->bsize);
+       mem->size = PAGE_ALIGN(buf->bsize);
        mem->vaddr = dt3155_alloc_buffer(q->dev, mem->size,
                                        &mem->dma_handle, GFP_KERNEL);
        if (!mem->vaddr) {
@@ -552,8 +556,8 @@ dt3155_mmap_mapper(struct videobuf_queue *q, struct vm_area_struct *vma)
 
        dev_dbg(q->dev, "mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n",
                map, q, vma->vm_start, vma->vm_end,
-               (long int) q->bufs[first]->bsize,
-               vma->vm_pgoff, first);
+               (long int)buf->bsize,
+               vma->vm_pgoff, buf->i);
 
        dt3155_vm_open(vma);