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saa7146_video.c
1332 lines (1117 loc) · 34.6 KB
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saa7146_video.c
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <media/saa7146_vv.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-event.h>
#include <media/v4l2-ctrls.h>
#include <linux/module.h>
static int max_memory = 32;
module_param(max_memory, int, 0644);
MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)");
#define IS_CAPTURE_ACTIVE(fh) \
(((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh))
#define IS_OVERLAY_ACTIVE(fh) \
(((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh))
/* format descriptions for capture and preview */
static struct saa7146_format formats[] = {
{
.name = "RGB-8 (3-3-2)",
.pixelformat = V4L2_PIX_FMT_RGB332,
.trans = RGB08_COMPOSED,
.depth = 8,
.flags = 0,
}, {
.name = "RGB-16 (5/B-6/G-5/R)",
.pixelformat = V4L2_PIX_FMT_RGB565,
.trans = RGB16_COMPOSED,
.depth = 16,
.flags = 0,
}, {
.name = "RGB-24 (B-G-R)",
.pixelformat = V4L2_PIX_FMT_BGR24,
.trans = RGB24_COMPOSED,
.depth = 24,
.flags = 0,
}, {
.name = "RGB-32 (B-G-R)",
.pixelformat = V4L2_PIX_FMT_BGR32,
.trans = RGB32_COMPOSED,
.depth = 32,
.flags = 0,
}, {
.name = "RGB-32 (R-G-B)",
.pixelformat = V4L2_PIX_FMT_RGB32,
.trans = RGB32_COMPOSED,
.depth = 32,
.flags = 0,
.swap = 0x2,
}, {
.name = "Greyscale-8",
.pixelformat = V4L2_PIX_FMT_GREY,
.trans = Y8,
.depth = 8,
.flags = 0,
}, {
.name = "YUV 4:2:2 planar (Y-Cb-Cr)",
.pixelformat = V4L2_PIX_FMT_YUV422P,
.trans = YUV422_DECOMPOSED,
.depth = 16,
.flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
}, {
.name = "YVU 4:2:0 planar (Y-Cb-Cr)",
.pixelformat = V4L2_PIX_FMT_YVU420,
.trans = YUV420_DECOMPOSED,
.depth = 12,
.flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
}, {
.name = "YUV 4:2:0 planar (Y-Cb-Cr)",
.pixelformat = V4L2_PIX_FMT_YUV420,
.trans = YUV420_DECOMPOSED,
.depth = 12,
.flags = FORMAT_IS_PLANAR,
}, {
.name = "YUV 4:2:2 (U-Y-V-Y)",
.pixelformat = V4L2_PIX_FMT_UYVY,
.trans = YUV422_COMPOSED,
.depth = 16,
.flags = 0,
}
};
/* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps.
due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped
(like V4L2_PIX_FMT_YUYV) ... 8-( */
static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format);
struct saa7146_format* saa7146_format_by_fourcc(struct saa7146_dev *dev, int fourcc)
{
int i, j = NUM_FORMATS;
for (i = 0; i < j; i++) {
if (formats[i].pixelformat == fourcc) {
return formats+i;
}
}
DEB_D("unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
return NULL;
}
static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f);
int saa7146_start_preview(struct saa7146_fh *fh)
{
struct saa7146_dev *dev = fh->dev;
struct saa7146_vv *vv = dev->vv_data;
struct v4l2_format fmt;
int ret = 0, err = 0;
DEB_EE("dev:%p, fh:%p\n", dev, fh);
/* check if we have overlay information */
if (vv->ov.fh == NULL) {
DEB_D("no overlay data available. try S_FMT first.\n");
return -EAGAIN;
}
/* check if streaming capture is running */
if (IS_CAPTURE_ACTIVE(fh) != 0) {
DEB_D("streaming capture is active\n");
return -EBUSY;
}
/* check if overlay is running */
if (IS_OVERLAY_ACTIVE(fh) != 0) {
if (vv->video_fh == fh) {
DEB_D("overlay is already active\n");
return 0;
}
DEB_D("overlay is already active in another open\n");
return -EBUSY;
}
if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) {
DEB_D("cannot get necessary overlay resources\n");
return -EBUSY;
}
fmt.fmt.win = vv->ov.win;
err = vidioc_try_fmt_vid_overlay(NULL, fh, &fmt);
if (0 != err) {
saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
return -EBUSY;
}
vv->ov.win = fmt.fmt.win;
DEB_D("%dx%d+%d+%d %s field=%s\n",
vv->ov.win.w.width, vv->ov.win.w.height,
vv->ov.win.w.left, vv->ov.win.w.top,
vv->ov_fmt->name, v4l2_field_names[vv->ov.win.field]);
if (0 != (ret = saa7146_enable_overlay(fh))) {
DEB_D("enabling overlay failed: %d\n", ret);
saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
return ret;
}
vv->video_status = STATUS_OVERLAY;
vv->video_fh = fh;
return 0;
}
EXPORT_SYMBOL_GPL(saa7146_start_preview);
int saa7146_stop_preview(struct saa7146_fh *fh)
{
struct saa7146_dev *dev = fh->dev;
struct saa7146_vv *vv = dev->vv_data;
DEB_EE("dev:%p, fh:%p\n", dev, fh);
/* check if streaming capture is running */
if (IS_CAPTURE_ACTIVE(fh) != 0) {
DEB_D("streaming capture is active\n");
return -EBUSY;
}
/* check if overlay is running at all */
if ((vv->video_status & STATUS_OVERLAY) == 0) {
DEB_D("no active overlay\n");
return 0;
}
if (vv->video_fh != fh) {
DEB_D("overlay is active, but in another open\n");
return -EBUSY;
}
vv->video_status = 0;
vv->video_fh = NULL;
saa7146_disable_overlay(fh);
saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
return 0;
}
EXPORT_SYMBOL_GPL(saa7146_stop_preview);
/********************************************************************************/
/* common pagetable functions */
static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf)
{
struct pci_dev *pci = dev->pci;
struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
struct scatterlist *list = dma->sglist;
int length = dma->sglen;
struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
DEB_EE("dev:%p, buf:%p, sg_len:%d\n", dev, buf, length);
if( 0 != IS_PLANAR(sfmt->trans)) {
struct saa7146_pgtable *pt1 = &buf->pt[0];
struct saa7146_pgtable *pt2 = &buf->pt[1];
struct saa7146_pgtable *pt3 = &buf->pt[2];
__le32 *ptr1, *ptr2, *ptr3;
__le32 fill;
int size = buf->fmt->width*buf->fmt->height;
int i,p,m1,m2,m3,o1,o2;
switch( sfmt->depth ) {
case 12: {
/* create some offsets inside the page table */
m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1;
m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
o1 = size%PAGE_SIZE;
o2 = (size+(size/4))%PAGE_SIZE;
DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",
size, m1, m2, m3, o1, o2);
break;
}
case 16: {
/* create some offsets inside the page table */
m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1;
o1 = size%PAGE_SIZE;
o2 = (size+(size/2))%PAGE_SIZE;
DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",
size, m1, m2, m3, o1, o2);
break;
}
default: {
return -1;
}
}
ptr1 = pt1->cpu;
ptr2 = pt2->cpu;
ptr3 = pt3->cpu;
/* walk all pages, copy all page addresses to ptr1 */
for (i = 0; i < length; i++, list++) {
for (p = 0; p * 4096 < list->length; p++, ptr1++) {
*ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
}
}
/*
ptr1 = pt1->cpu;
for(j=0;j<40;j++) {
printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
}
*/
/* if we have a user buffer, the first page may not be
aligned to a page boundary. */
pt1->offset = dma->sglist->offset;
pt2->offset = pt1->offset+o1;
pt3->offset = pt1->offset+o2;
/* create video-dma2 page table */
ptr1 = pt1->cpu;
for(i = m1; i <= m2 ; i++, ptr2++) {
*ptr2 = ptr1[i];
}
fill = *(ptr2-1);
for(;i<1024;i++,ptr2++) {
*ptr2 = fill;
}
/* create video-dma3 page table */
ptr1 = pt1->cpu;
for(i = m2; i <= m3; i++,ptr3++) {
*ptr3 = ptr1[i];
}
fill = *(ptr3-1);
for(;i<1024;i++,ptr3++) {
*ptr3 = fill;
}
/* finally: finish up video-dma1 page table */
ptr1 = pt1->cpu+m1;
fill = pt1->cpu[m1];
for(i=m1;i<1024;i++,ptr1++) {
*ptr1 = fill;
}
/*
ptr1 = pt1->cpu;
ptr2 = pt2->cpu;
ptr3 = pt3->cpu;
for(j=0;j<40;j++) {
printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
}
for(j=0;j<40;j++) {
printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
}
for(j=0;j<40;j++) {
printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
}
*/
} else {
struct saa7146_pgtable *pt = &buf->pt[0];
return saa7146_pgtable_build_single(pci, pt, list, length);
}
return 0;
}
/********************************************************************************/
/* file operations */
static int video_begin(struct saa7146_fh *fh)
{
struct saa7146_dev *dev = fh->dev;
struct saa7146_vv *vv = dev->vv_data;
struct saa7146_format *fmt = NULL;
unsigned int resource;
int ret = 0, err = 0;
DEB_EE("dev:%p, fh:%p\n", dev, fh);
if ((vv->video_status & STATUS_CAPTURE) != 0) {
if (vv->video_fh == fh) {
DEB_S("already capturing\n");
return 0;
}
DEB_S("already capturing in another open\n");
return -EBUSY;
}
if ((vv->video_status & STATUS_OVERLAY) != 0) {
DEB_S("warning: suspending overlay video for streaming capture\n");
vv->ov_suspend = vv->video_fh;
err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
if (0 != err) {
DEB_D("suspending video failed. aborting\n");
return err;
}
}
fmt = saa7146_format_by_fourcc(dev, vv->video_fmt.pixelformat);
/* we need to have a valid format set here */
BUG_ON(NULL == fmt);
if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
} else {
resource = RESOURCE_DMA1_HPS;
}
ret = saa7146_res_get(fh, resource);
if (0 == ret) {
DEB_S("cannot get capture resource %d\n", resource);
if (vv->ov_suspend != NULL) {
saa7146_start_preview(vv->ov_suspend);
vv->ov_suspend = NULL;
}
return -EBUSY;
}
/* clear out beginning of streaming bit (rps register 0)*/
saa7146_write(dev, MC2, MASK_27 );
/* enable rps0 irqs */
SAA7146_IER_ENABLE(dev, MASK_27);
vv->video_fh = fh;
vv->video_status = STATUS_CAPTURE;
return 0;
}
static int video_end(struct saa7146_fh *fh, struct file *file)
{
struct saa7146_dev *dev = fh->dev;
struct saa7146_vv *vv = dev->vv_data;
struct saa7146_format *fmt = NULL;
unsigned long flags;
unsigned int resource;
u32 dmas = 0;
DEB_EE("dev:%p, fh:%p\n", dev, fh);
if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
DEB_S("not capturing\n");
return 0;
}
if (vv->video_fh != fh) {
DEB_S("capturing, but in another open\n");
return -EBUSY;
}
fmt = saa7146_format_by_fourcc(dev, vv->video_fmt.pixelformat);
/* we need to have a valid format set here */
BUG_ON(NULL == fmt);
if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
dmas = MASK_22 | MASK_21 | MASK_20;
} else {
resource = RESOURCE_DMA1_HPS;
dmas = MASK_22;
}
spin_lock_irqsave(&dev->slock,flags);
/* disable rps0 */
saa7146_write(dev, MC1, MASK_28);
/* disable rps0 irqs */
SAA7146_IER_DISABLE(dev, MASK_27);
/* shut down all used video dma transfers */
saa7146_write(dev, MC1, dmas);
spin_unlock_irqrestore(&dev->slock, flags);
vv->video_fh = NULL;
vv->video_status = 0;
saa7146_res_free(fh, resource);
if (vv->ov_suspend != NULL) {
saa7146_start_preview(vv->ov_suspend);
vv->ov_suspend = NULL;
}
return 0;
}
static int vidioc_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
{
struct video_device *vdev = video_devdata(file);
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
strcpy((char *)cap->driver, "saa7146 v4l2");
strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci));
cap->device_caps =
V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_VIDEO_OVERLAY |
V4L2_CAP_READWRITE |
V4L2_CAP_STREAMING;
cap->device_caps |= dev->ext_vv_data->capabilities;
if (vdev->vfl_type == VFL_TYPE_GRABBER)
cap->device_caps &=
~(V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_OUTPUT);
else
cap->device_caps &=
~(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY);
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
{
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
struct saa7146_vv *vv = dev->vv_data;
*fb = vv->ov_fb;
fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
fb->flags = V4L2_FBUF_FLAG_PRIMARY;
return 0;
}
static int vidioc_s_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
{
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
struct saa7146_vv *vv = dev->vv_data;
struct saa7146_format *fmt;
DEB_EE("VIDIOC_S_FBUF\n");
if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
return -EPERM;
/* check args */
fmt = saa7146_format_by_fourcc(dev, fb->fmt.pixelformat);
if (NULL == fmt)
return -EINVAL;
/* planar formats are not allowed for overlay video, clipping and video dma would clash */
if (fmt->flags & FORMAT_IS_PLANAR)
DEB_S("planar pixelformat '%4.4s' not allowed for overlay\n",
(char *)&fmt->pixelformat);
/* check if overlay is running */
if (IS_OVERLAY_ACTIVE(fh) != 0) {
if (vv->video_fh != fh) {
DEB_D("refusing to change framebuffer informations while overlay is active in another open\n");
return -EBUSY;
}
}
/* ok, accept it */
vv->ov_fb = *fb;
vv->ov_fmt = fmt;
if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) {
vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8;
DEB_D("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline);
}
return 0;
}
static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f)
{
if (f->index >= NUM_FORMATS)
return -EINVAL;
strlcpy((char *)f->description, formats[f->index].name,
sizeof(f->description));
f->pixelformat = formats[f->index].pixelformat;
return 0;
}
int saa7146_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct saa7146_dev *dev = container_of(ctrl->handler,
struct saa7146_dev, ctrl_handler);
struct saa7146_vv *vv = dev->vv_data;
u32 val;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
val = saa7146_read(dev, BCS_CTRL);
val &= 0x00ffffff;
val |= (ctrl->val << 24);
saa7146_write(dev, BCS_CTRL, val);
saa7146_write(dev, MC2, MASK_22 | MASK_06);
break;
case V4L2_CID_CONTRAST:
val = saa7146_read(dev, BCS_CTRL);
val &= 0xff00ffff;
val |= (ctrl->val << 16);
saa7146_write(dev, BCS_CTRL, val);
saa7146_write(dev, MC2, MASK_22 | MASK_06);
break;
case V4L2_CID_SATURATION:
val = saa7146_read(dev, BCS_CTRL);
val &= 0xffffff00;
val |= (ctrl->val << 0);
saa7146_write(dev, BCS_CTRL, val);
saa7146_write(dev, MC2, MASK_22 | MASK_06);
break;
case V4L2_CID_HFLIP:
/* fixme: we can support changing VFLIP and HFLIP here... */
if ((vv->video_status & STATUS_CAPTURE))
return -EBUSY;
vv->hflip = ctrl->val;
break;
case V4L2_CID_VFLIP:
if ((vv->video_status & STATUS_CAPTURE))
return -EBUSY;
vv->vflip = ctrl->val;
break;
default:
return -EINVAL;
}
if ((vv->video_status & STATUS_OVERLAY) != 0) { /* CHECK: && (vv->video_fh == fh)) */
struct saa7146_fh *fh = vv->video_fh;
saa7146_stop_preview(fh);
saa7146_start_preview(fh);
}
return 0;
}
static int vidioc_g_parm(struct file *file, void *fh,
struct v4l2_streamparm *parm)
{
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
struct saa7146_vv *vv = dev->vv_data;
if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
parm->parm.capture.readbuffers = 1;
v4l2_video_std_frame_period(vv->standard->id,
&parm->parm.capture.timeperframe);
return 0;
}
static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
{
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
struct saa7146_vv *vv = dev->vv_data;
f->fmt.pix = vv->video_fmt;
return 0;
}
static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
{
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
struct saa7146_vv *vv = dev->vv_data;
f->fmt.win = vv->ov.win;
return 0;
}
static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f)
{
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
struct saa7146_vv *vv = dev->vv_data;
f->fmt.vbi = vv->vbi_fmt;
return 0;
}
static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
{
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
struct saa7146_vv *vv = dev->vv_data;
struct saa7146_format *fmt;
enum v4l2_field field;
int maxw, maxh;
int calc_bpl;
DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat);
if (NULL == fmt)
return -EINVAL;
field = f->fmt.pix.field;
maxw = vv->standard->h_max_out;
maxh = vv->standard->v_max_out;
if (V4L2_FIELD_ANY == field) {
field = (f->fmt.pix.height > maxh / 2)
? V4L2_FIELD_INTERLACED
: V4L2_FIELD_BOTTOM;
}
switch (field) {
case V4L2_FIELD_ALTERNATE:
vv->last_field = V4L2_FIELD_TOP;
maxh = maxh / 2;
break;
case V4L2_FIELD_TOP:
case V4L2_FIELD_BOTTOM:
vv->last_field = V4L2_FIELD_INTERLACED;
maxh = maxh / 2;
break;
case V4L2_FIELD_INTERLACED:
vv->last_field = V4L2_FIELD_INTERLACED;
break;
default:
DEB_D("no known field mode '%d'\n", field);
return -EINVAL;
}
f->fmt.pix.field = field;
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
if (f->fmt.pix.width > maxw)
f->fmt.pix.width = maxw;
if (f->fmt.pix.height > maxh)
f->fmt.pix.height = maxh;
calc_bpl = (f->fmt.pix.width * fmt->depth) / 8;
if (f->fmt.pix.bytesperline < calc_bpl)
f->fmt.pix.bytesperline = calc_bpl;
if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */
f->fmt.pix.bytesperline = calc_bpl;
f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
DEB_D("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n",
f->fmt.pix.width, f->fmt.pix.height,
f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
return 0;
}
static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
{
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
struct saa7146_vv *vv = dev->vv_data;
struct v4l2_window *win = &f->fmt.win;
enum v4l2_field field;
int maxw, maxh;
DEB_EE("dev:%p\n", dev);
if (NULL == vv->ov_fb.base) {
DEB_D("no fb base set\n");
return -EINVAL;
}
if (NULL == vv->ov_fmt) {
DEB_D("no fb fmt set\n");
return -EINVAL;
}
if (win->w.width < 48 || win->w.height < 32) {
DEB_D("min width/height. (%d,%d)\n",
win->w.width, win->w.height);
return -EINVAL;
}
if (win->clipcount > 16) {
DEB_D("clipcount too big\n");
return -EINVAL;
}
field = win->field;
maxw = vv->standard->h_max_out;
maxh = vv->standard->v_max_out;
if (V4L2_FIELD_ANY == field) {
field = (win->w.height > maxh / 2)
? V4L2_FIELD_INTERLACED
: V4L2_FIELD_TOP;
}
switch (field) {
case V4L2_FIELD_TOP:
case V4L2_FIELD_BOTTOM:
case V4L2_FIELD_ALTERNATE:
maxh = maxh / 2;
break;
case V4L2_FIELD_INTERLACED:
break;
default:
DEB_D("no known field mode '%d'\n", field);
return -EINVAL;
}
win->field = field;
if (win->w.width > maxw)
win->w.width = maxw;
if (win->w.height > maxh)
win->w.height = maxh;
return 0;
}
static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f)
{
struct saa7146_fh *fh = __fh;
struct saa7146_dev *dev = fh->dev;
struct saa7146_vv *vv = dev->vv_data;
int err;
DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
if (IS_CAPTURE_ACTIVE(fh) != 0) {
DEB_EE("streaming capture is active\n");
return -EBUSY;
}
err = vidioc_try_fmt_vid_cap(file, fh, f);
if (0 != err)
return err;
vv->video_fmt = f->fmt.pix;
DEB_EE("set to pixelformat '%4.4s'\n",
(char *)&vv->video_fmt.pixelformat);
return 0;
}
static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f)
{
struct saa7146_fh *fh = __fh;
struct saa7146_dev *dev = fh->dev;
struct saa7146_vv *vv = dev->vv_data;
int err;
DEB_EE("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh);
err = vidioc_try_fmt_vid_overlay(file, fh, f);
if (0 != err)
return err;
vv->ov.win = f->fmt.win;
vv->ov.nclips = f->fmt.win.clipcount;
if (vv->ov.nclips > 16)
vv->ov.nclips = 16;
if (copy_from_user(vv->ov.clips, f->fmt.win.clips,
sizeof(struct v4l2_clip) * vv->ov.nclips)) {
return -EFAULT;
}
/* vv->ov.fh is used to indicate that we have valid overlay informations, too */
vv->ov.fh = fh;
/* check if our current overlay is active */
if (IS_OVERLAY_ACTIVE(fh) != 0) {
saa7146_stop_preview(fh);
saa7146_start_preview(fh);
}
return 0;
}
static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm)
{
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
struct saa7146_vv *vv = dev->vv_data;
*norm = vv->standard->id;
return 0;
}
/* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
PAL / NTSC / SECAM. if your hardware does not (or does more)
-- override this function in your extension */
/*
case VIDIOC_ENUMSTD:
{
struct v4l2_standard *e = arg;
if (e->index < 0 )
return -EINVAL;
if( e->index < dev->ext_vv_data->num_stds ) {
DEB_EE("VIDIOC_ENUMSTD: index:%d\n", e->index);
v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
return 0;
}
return -EINVAL;
}
*/
static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id *id)
{
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
struct saa7146_vv *vv = dev->vv_data;
int found = 0;
int err, i;
DEB_EE("VIDIOC_S_STD\n");
if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
DEB_D("cannot change video standard while streaming capture is active\n");
return -EBUSY;
}
if ((vv->video_status & STATUS_OVERLAY) != 0) {
vv->ov_suspend = vv->video_fh;
err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
if (0 != err) {
DEB_D("suspending video failed. aborting\n");
return err;
}
}
for (i = 0; i < dev->ext_vv_data->num_stds; i++)
if (*id & dev->ext_vv_data->stds[i].id)
break;
if (i != dev->ext_vv_data->num_stds) {
vv->standard = &dev->ext_vv_data->stds[i];
if (NULL != dev->ext_vv_data->std_callback)
dev->ext_vv_data->std_callback(dev, vv->standard);
found = 1;
}
if (vv->ov_suspend != NULL) {
saa7146_start_preview(vv->ov_suspend);
vv->ov_suspend = NULL;
}
if (!found) {
DEB_EE("VIDIOC_S_STD: standard not found\n");
return -EINVAL;
}
DEB_EE("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name);
return 0;
}
static int vidioc_overlay(struct file *file, void *fh, unsigned int on)
{
int err;
DEB_D("VIDIOC_OVERLAY on:%d\n", on);
if (on)
err = saa7146_start_preview(fh);
else
err = saa7146_stop_preview(fh);
return err;
}
static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b)
{
struct saa7146_fh *fh = __fh;
if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
return videobuf_reqbufs(&fh->video_q, b);
if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE)
return videobuf_reqbufs(&fh->vbi_q, b);
return -EINVAL;
}
static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
{
struct saa7146_fh *fh = __fh;
if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
return videobuf_querybuf(&fh->video_q, buf);
if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
return videobuf_querybuf(&fh->vbi_q, buf);
return -EINVAL;
}
static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
{
struct saa7146_fh *fh = __fh;
if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
return videobuf_qbuf(&fh->video_q, buf);
if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
return videobuf_qbuf(&fh->vbi_q, buf);
return -EINVAL;
}
static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
{
struct saa7146_fh *fh = __fh;
if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK);
if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK);
return -EINVAL;
}
static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type)
{
struct saa7146_fh *fh = __fh;
int err;
DEB_D("VIDIOC_STREAMON, type:%d\n", type);
err = video_begin(fh);
if (err)
return err;
if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
return videobuf_streamon(&fh->video_q);
if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
return videobuf_streamon(&fh->vbi_q);
return -EINVAL;
}
static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type)
{
struct saa7146_fh *fh = __fh;
struct saa7146_dev *dev = fh->dev;
struct saa7146_vv *vv = dev->vv_data;
int err;
DEB_D("VIDIOC_STREAMOFF, type:%d\n", type);
/* ugly: we need to copy some checks from video_end(),
because videobuf_streamoff() relies on the capture running.
check and fix this */
if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
DEB_S("not capturing\n");
return 0;
}
if (vv->video_fh != fh) {
DEB_S("capturing, but in another open\n");
return -EBUSY;
}
err = -EINVAL;
if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
err = videobuf_streamoff(&fh->video_q);
else if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
err = videobuf_streamoff(&fh->vbi_q);
if (0 != err) {
DEB_D("warning: videobuf_streamoff() failed\n");
video_end(fh, file);
} else {
err = video_end(fh, file);
}
return err;
}
static int vidioc_g_chip_ident(struct file *file, void *__fh,
struct v4l2_dbg_chip_ident *chip)
{
struct saa7146_fh *fh = __fh;
struct saa7146_dev *dev = fh->dev;
chip->ident = V4L2_IDENT_NONE;
chip->revision = 0;
if (chip->match.type == V4L2_CHIP_MATCH_HOST) {
if (v4l2_chip_match_host(&chip->match))