* multifunction chip. Currently works with the Omnivision OV7670
* sensor.
*
+ * The data sheet for this device can be found at:
+ * http://www.marvell.com/products/pcconn/88ALP01.jsp
+ *
* Copyright 2006 One Laptop Per Child Association, Inc.
* Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
*
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/pci.h>
*/
#define MAX_DMA_BUFS 3
-static int alloc_bufs_at_load = 0;
-module_param(alloc_bufs_at_load, bool, 0444);
-MODULE_PARM_DESC(alloc_bufs_at_load,
- "Non-zero value causes DMA buffers to be allocated at module "
- "load time. This increases the chances of successfully getting "
- "those buffers, but at the cost of nailing down the memory from "
- "the outset.");
+static int alloc_bufs_at_read;
+module_param(alloc_bufs_at_read, bool, 0444);
+MODULE_PARM_DESC(alloc_bufs_at_read,
+ "Non-zero value causes DMA buffers to be allocated when the "
+ "video capture device is read, rather than at module load "
+ "time. This saves memory, but decreases the chances of "
+ "successfully getting those buffers.");
static int n_dma_bufs = 3;
module_param(n_dma_bufs, uint, 0644);
"will be allowed to allocate. These buffers are big and live "
"in vmalloc space.");
-static int flip = 0;
+static int flip;
module_param(flip, bool, 0444);
MODULE_PARM_DESC(flip,
"If set, the sensor will be instructed to flip the image "
buf->v4lbuf.field = V4L2_FIELD_NONE;
buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
/*
- * Offset: must be 32-bit even on a 64-bit system. video-buf
+ * Offset: must be 32-bit even on a 64-bit system. videobuf-dma-sg
* just uses the length times the index, but the spec warns
* against doing just that - vma merging problems. So we
* leave a gap between each pair of buffers.
}
if (cam->users == 0) {
cafe_ctlr_power_down(cam);
- if (! alloc_bufs_at_load)
+ if (alloc_bufs_at_read)
cafe_free_dma_bufs(cam);
}
mutex_unlock(&cam->s_mutex);
.sizeimage = VGA_WIDTH*VGA_HEIGHT*2,
};
-static int cafe_vidioc_enum_fmt_cap(struct file *filp,
+static int cafe_vidioc_enum_fmt_vid_cap(struct file *filp,
void *priv, struct v4l2_fmtdesc *fmt)
{
struct cafe_camera *cam = priv;
}
-static int cafe_vidioc_try_fmt_cap (struct file *filp, void *priv,
+static int cafe_vidioc_try_fmt_vid_cap(struct file *filp, void *priv,
struct v4l2_format *fmt)
{
struct cafe_camera *cam = priv;
return ret;
}
-static int cafe_vidioc_s_fmt_cap(struct file *filp, void *priv,
+static int cafe_vidioc_s_fmt_vid_cap(struct file *filp, void *priv,
struct v4l2_format *fmt)
{
struct cafe_camera *cam = priv;
/*
* See if the formatting works in principle.
*/
- ret = cafe_vidioc_try_fmt_cap(filp, priv, fmt);
+ ret = cafe_vidioc_try_fmt_vid_cap(filp, priv, fmt);
if (ret)
return ret;
/*
* The V4l2 spec wants us to be smarter, and actually get this from
* the camera (and not mess with it at open time). Someday.
*/
-static int cafe_vidioc_g_fmt_cap(struct file *filp, void *priv,
+static int cafe_vidioc_g_fmt_vid_cap(struct file *filp, void *priv,
struct v4l2_format *f)
{
struct cafe_camera *cam = priv;
.release = cafe_v4l_dev_release,
.vidioc_querycap = cafe_vidioc_querycap,
- .vidioc_enum_fmt_cap = cafe_vidioc_enum_fmt_cap,
- .vidioc_try_fmt_cap = cafe_vidioc_try_fmt_cap,
- .vidioc_s_fmt_cap = cafe_vidioc_s_fmt_cap,
- .vidioc_g_fmt_cap = cafe_vidioc_g_fmt_cap,
+ .vidioc_enum_fmt_vid_cap = cafe_vidioc_enum_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = cafe_vidioc_try_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = cafe_vidioc_s_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap = cafe_vidioc_g_fmt_vid_cap,
.vidioc_enum_input = cafe_vidioc_enum_input,
.vidioc_g_input = cafe_vidioc_g_input,
.vidioc_s_input = cafe_vidioc_s_input,
/*
* If so requested, try to get our DMA buffers now.
*/
- if (alloc_bufs_at_load) {
+ if (!alloc_bufs_at_read) {
if (cafe_alloc_dma_bufs(cam, 1))
cam_warn(cam, "Unable to alloc DMA buffers at load"
" will try again later.");
{
struct cafe_camera *cam = cafe_find_by_pdev(pdev);
int ret;
+ enum cafe_state cstate;
ret = pci_save_state(pdev);
if (ret)
return ret;
+ cstate = cam->state; /* HACK - stop_dma sets to idle */
cafe_ctlr_stop_dma(cam);
cafe_ctlr_power_down(cam);
pci_disable_device(pdev);
+ cam->state = cstate;
return 0;
}