diff options
Diffstat (limited to 'drivers/media/common/saa7146/saa7146_video.c')
| -rw-r--r-- | drivers/media/common/saa7146/saa7146_video.c | 1332 |
1 files changed, 1332 insertions, 0 deletions
diff --git a/drivers/media/common/saa7146/saa7146_video.c b/drivers/media/common/saa7146/saa7146_video.c new file mode 100644 index 00000000000..4143d61f79b --- /dev/null +++ b/drivers/media/common/saa7146/saa7146_video.c @@ -0,0 +1,1332 @@ +#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; + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; + 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 | V4L2_CAP_AUDIO); + 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, const 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)) + chip->ident = V4L2_IDENT_SAA7146; + return 0; + } + if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER && + chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR) + return -EINVAL; + return v4l2_device_call_until_err(&dev->v4l2_dev, 0, + core, g_chip_ident, chip); +} + +const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = { + .vidioc_querycap = vidioc_querycap, + .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, + .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, + .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_vid_overlay, + .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_vid_overlay, + .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_vid_overlay, + .vidioc_g_chip_ident = vidioc_g_chip_ident, + + .vidioc_overlay = vidioc_overlay, + .vidioc_g_fbuf = vidioc_g_fbuf, + .vidioc_s_fbuf = vidioc_s_fbuf, + .vidioc_reqbufs = vidioc_reqbufs, + .vidioc_querybuf = vidioc_querybuf, + .vidioc_qbuf = vidioc_qbuf, + .vidioc_dqbuf = vidioc_dqbuf, + .vidioc_g_std = vidioc_g_std, + .vidioc_s_std = vidioc_s_std, + .vidioc_streamon = vidioc_streamon, + .vidioc_streamoff = vidioc_streamoff, + .vidioc_g_parm = vidioc_g_parm, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + +const struct v4l2_ioctl_ops saa7146_vbi_ioctl_ops = { + .vidioc_querycap = vidioc_querycap, + .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, + .vidioc_g_chip_ident = vidioc_g_chip_ident, + + .vidioc_reqbufs = vidioc_reqbufs, + .vidioc_querybuf = vidioc_querybuf, + .vidioc_qbuf = vidioc_qbuf, + .vidioc_dqbuf = vidioc_dqbuf, + .vidioc_g_std = vidioc_g_std, + .vidioc_s_std = vidioc_s_std, + .vidioc_streamon = vidioc_streamon, + .vidioc_streamoff = vidioc_streamoff, + .vidioc_g_parm = vidioc_g_parm, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + +/*********************************************************************************/ +/* buffer handling functions */ + +static int buffer_activate (struct saa7146_dev *dev, + struct saa7146_buf *buf, + struct saa7146_buf *next) +{ + struct saa7146_vv *vv = dev->vv_data; + + buf->vb.state = VIDEOBUF_ACTIVE; + saa7146_set_capture(dev,buf,next); + + mod_timer(&vv->video_dmaq.timeout, jiffies+BUFFER_TIMEOUT); + return 0; +} + +static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf) +{ + saa7146_pgtable_free(dev->pci, &buf->pt[0]); + saa7146_pgtable_free(dev->pci, &buf->pt[1]); + saa7146_pgtable_free(dev->pci, &buf->pt[2]); +} + +static int buffer_prepare(struct videobuf_queue *q, + struct videobuf_buffer *vb, enum v4l2_field field) +{ + struct file *file = q->priv_data; + struct saa7146_fh *fh = file->private_data; + struct saa7146_dev *dev = fh->dev; + struct saa7146_vv *vv = dev->vv_data; + struct saa7146_buf *buf = (struct saa7146_buf *)vb; + int size,err = 0; + + DEB_CAP("vbuf:%p\n", vb); + + /* sanity checks */ + if (vv->video_fmt.width < 48 || + vv->video_fmt.height < 32 || + vv->video_fmt.width > vv->standard->h_max_out || + vv->video_fmt.height > vv->standard->v_max_out) { + DEB_D("w (%d) / h (%d) out of bounds\n", + vv->video_fmt.width, vv->video_fmt.height); + return -EINVAL; + } + + size = vv->video_fmt.sizeimage; + if (0 != buf->vb.baddr && buf->vb.bsize < size) { + DEB_D("size mismatch\n"); + return -EINVAL; + } + + DEB_CAP("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n", + vv->video_fmt.width, vv->video_fmt.height, + size, v4l2_field_names[vv->video_fmt.field]); + if (buf->vb.width != vv->video_fmt.width || + buf->vb.bytesperline != vv->video_fmt.bytesperline || + buf->vb.height != vv->video_fmt.height || + buf->vb.size != size || + buf->vb.field != field || + buf->vb.field != vv->video_fmt.field || + buf->fmt != &vv->video_fmt) { + saa7146_dma_free(dev,q,buf); + } + + if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { + struct saa7146_format *sfmt; + + buf->vb.bytesperline = vv->video_fmt.bytesperline; + buf->vb.width = vv->video_fmt.width; + buf->vb.height = vv->video_fmt.height; + buf->vb.size = size; + buf->vb.field = field; + buf->fmt = &vv->video_fmt; + buf->vb.field = vv->video_fmt.field; + + sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat); + + release_all_pagetables(dev, buf); + if( 0 != IS_PLANAR(sfmt->trans)) { + saa7146_pgtable_alloc(dev->pci, &buf->pt[0]); + saa7146_pgtable_alloc(dev->pci, &buf->pt[1]); + saa7146_pgtable_alloc(dev->pci, &buf->pt[2]); + } else { + saa7146_pgtable_alloc(dev->pci, &buf->pt[0]); + } + + err = videobuf_iolock(q,&buf->vb, &vv->ov_fb); + if (err) + goto oops; + err = saa7146_pgtable_build(dev,buf); + if (err) + goto oops; + } + buf->vb.state = VIDEOBUF_PREPARED; + buf->activate = buffer_activate; + + return 0; + + oops: + DEB_D("error out\n"); + saa7146_dma_free(dev,q,buf); + + return err; +} + +static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) +{ + struct file *file = q->priv_data; + struct saa7146_fh *fh = file->private_data; + struct saa7146_vv *vv = fh->dev->vv_data; + + if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS) + *count = MAX_SAA7146_CAPTURE_BUFFERS; + + *size = vv->video_fmt.sizeimage; + + /* check if we exceed the "max_memory" parameter */ + if( (*count * *size) > (max_memory*1048576) ) { + *count = (max_memory*1048576) / *size; + } + + DEB_CAP("%d buffers, %d bytes each\n", *count, *size); + + return 0; +} + +static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb) +{ + struct file *file = q->priv_data; + struct saa7146_fh *fh = file->private_data; + struct saa7146_dev *dev = fh->dev; + struct saa7146_vv *vv = dev->vv_data; + struct saa7146_buf *buf = (struct saa7146_buf *)vb; + + DEB_CAP("vbuf:%p\n", vb); + saa7146_buffer_queue(fh->dev, &vv->video_dmaq, buf); +} + +static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb) +{ + struct file *file = q->priv_data; + struct saa7146_fh *fh = file->private_data; + struct saa7146_dev *dev = fh->dev; + struct saa7146_buf *buf = (struct saa7146_buf *)vb; + + DEB_CAP("vbuf:%p\n", vb); + + saa7146_dma_free(dev,q,buf); + + release_all_pagetables(dev, buf); +} + +static struct videobuf_queue_ops video_qops = { + .buf_setup = buffer_setup, + .buf_prepare = buffer_prepare, + .buf_queue = buffer_queue, + .buf_release = buffer_release, +}; + +/********************************************************************************/ +/* file operations */ + +static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv) +{ + INIT_LIST_HEAD(&vv->video_dmaq.queue); + + init_timer(&vv->video_dmaq.timeout); + vv->video_dmaq.timeout.function = saa7146_buffer_timeout; + vv->video_dmaq.timeout.data = (unsigned long)(&vv->video_dmaq); + vv->video_dmaq.dev = dev; + + /* set some default values */ + vv->standard = &dev->ext_vv_data->stds[0]; + + /* FIXME: what's this? */ + vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A; + vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A; +} + + +static int video_open(struct saa7146_dev *dev, struct file *file) +{ + struct saa7146_fh *fh = file->private_data; + + videobuf_queue_sg_init(&fh->video_q, &video_qops, + &dev->pci->dev, &dev->slock, + V4L2_BUF_TYPE_VIDEO_CAPTURE, + V4L2_FIELD_INTERLACED, + sizeof(struct saa7146_buf), + file, &dev->v4l2_lock); + + return 0; +} + + +static void video_close(struct saa7146_dev *dev, struct file *file) +{ + struct saa7146_fh *fh = file->private_data; + struct saa7146_vv *vv = dev->vv_data; + struct videobuf_queue *q = &fh->video_q; + + if (IS_CAPTURE_ACTIVE(fh) != 0) + video_end(fh, file); + else if (IS_OVERLAY_ACTIVE(fh) != 0) + saa7146_stop_preview(fh); + + videobuf_stop(q); + /* hmm, why is this function declared void? */ +} + + +static void video_irq_done(struct saa7146_dev *dev, unsigned long st) +{ + struct saa7146_vv *vv = dev->vv_data; + struct saa7146_dmaqueue *q = &vv->video_dmaq; + + spin_lock(&dev->slock); + DEB_CAP("called\n"); + + /* only finish the buffer if we have one... */ + if( NULL != q->curr ) { + saa7146_buffer_finish(dev,q,VIDEOBUF_DONE); + } + saa7146_buffer_next(dev,q,0); + + spin_unlock(&dev->slock); +} + +static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos) +{ + struct saa7146_fh *fh = file->private_data; + struct saa7146_dev *dev = fh->dev; + struct saa7146_vv *vv = dev->vv_data; + ssize_t ret = 0; + + DEB_EE("called\n"); + + if ((vv->video_status & STATUS_CAPTURE) != 0) { + /* fixme: should we allow read() captures while streaming capture? */ + if (vv->video_fh == fh) { + DEB_S("already capturing\n"); + return -EBUSY; + } + DEB_S("already capturing in another open\n"); + return -EBUSY; + } + + ret = video_begin(fh); + if( 0 != ret) { + goto out; + } + + ret = videobuf_read_one(&fh->video_q , data, count, ppos, + file->f_flags & O_NONBLOCK); + if (ret != 0) { + video_end(fh, file); + } else { + ret = video_end(fh, file); + } +out: + /* restart overlay if it was active before */ + if (vv->ov_suspend != NULL) { + saa7146_start_preview(vv->ov_suspend); + vv->ov_suspend = NULL; + } + + return ret; +} + +struct saa7146_use_ops saa7146_video_uops = { + .init = video_init, + .open = video_open, + .release = video_close, + .irq_done = video_irq_done, + .read = video_read, +}; |