diff options
Diffstat (limited to 'drivers/media/common/saa7146_vbi.c')
| -rw-r--r-- | drivers/media/common/saa7146_vbi.c | 512 |
1 files changed, 512 insertions, 0 deletions
diff --git a/drivers/media/common/saa7146_vbi.c b/drivers/media/common/saa7146_vbi.c new file mode 100644 index 00000000..b2e71834 --- /dev/null +++ b/drivers/media/common/saa7146_vbi.c @@ -0,0 +1,512 @@ +#include <media/saa7146_vv.h> + +static int vbi_pixel_to_capture = 720 * 2; + +static int vbi_workaround(struct saa7146_dev *dev) +{ + struct saa7146_vv *vv = dev->vv_data; + + u32 *cpu; + dma_addr_t dma_addr; + + int count = 0; + int i; + + DECLARE_WAITQUEUE(wait, current); + + DEB_VBI("dev:%p\n", dev); + + /* once again, a bug in the saa7146: the brs acquisition + is buggy and especially the BXO-counter does not work + as specified. there is this workaround, but please + don't let me explain it. ;-) */ + + cpu = pci_alloc_consistent(dev->pci, 4096, &dma_addr); + if (NULL == cpu) + return -ENOMEM; + + /* setup some basic programming, just for the workaround */ + saa7146_write(dev, BASE_EVEN3, dma_addr); + saa7146_write(dev, BASE_ODD3, dma_addr+vbi_pixel_to_capture); + saa7146_write(dev, PROT_ADDR3, dma_addr+4096); + saa7146_write(dev, PITCH3, vbi_pixel_to_capture); + saa7146_write(dev, BASE_PAGE3, 0x0); + saa7146_write(dev, NUM_LINE_BYTE3, (2<<16)|((vbi_pixel_to_capture)<<0)); + saa7146_write(dev, MC2, MASK_04|MASK_20); + + /* load brs-control register */ + WRITE_RPS1(CMD_WR_REG | (1 << 8) | (BRS_CTRL/4)); + /* BXO = 1h, BRS to outbound */ + WRITE_RPS1(0xc000008c); + /* wait for vbi_a or vbi_b*/ + if ( 0 != (SAA7146_USE_PORT_B_FOR_VBI & dev->ext_vv_data->flags)) { + DEB_D("...using port b\n"); + WRITE_RPS1(CMD_PAUSE | CMD_OAN | CMD_SIG1 | CMD_E_FID_B); + WRITE_RPS1(CMD_PAUSE | CMD_OAN | CMD_SIG1 | CMD_O_FID_B); +/* + WRITE_RPS1(CMD_PAUSE | MASK_09); +*/ + } else { + DEB_D("...using port a\n"); + WRITE_RPS1(CMD_PAUSE | MASK_10); + } + /* upload brs */ + WRITE_RPS1(CMD_UPLOAD | MASK_08); + /* load brs-control register */ + WRITE_RPS1(CMD_WR_REG | (1 << 8) | (BRS_CTRL/4)); + /* BYO = 1, BXO = NQBIL (=1728 for PAL, for NTSC this is 858*2) - NumByte3 (=1440) = 288 */ + WRITE_RPS1(((1728-(vbi_pixel_to_capture)) << 7) | MASK_19); + /* wait for brs_done */ + WRITE_RPS1(CMD_PAUSE | MASK_08); + /* upload brs */ + WRITE_RPS1(CMD_UPLOAD | MASK_08); + /* load video-dma3 NumLines3 and NumBytes3 */ + WRITE_RPS1(CMD_WR_REG | (1 << 8) | (NUM_LINE_BYTE3/4)); + /* dev->vbi_count*2 lines, 720 pixel (= 1440 Bytes) */ + WRITE_RPS1((2 << 16) | (vbi_pixel_to_capture)); + /* load brs-control register */ + WRITE_RPS1(CMD_WR_REG | (1 << 8) | (BRS_CTRL/4)); + /* Set BRS right: note: this is an experimental value for BXO (=> PAL!) */ + WRITE_RPS1((540 << 7) | (5 << 19)); // 5 == vbi_start + /* wait for brs_done */ + WRITE_RPS1(CMD_PAUSE | MASK_08); + /* upload brs and video-dma3*/ + WRITE_RPS1(CMD_UPLOAD | MASK_08 | MASK_04); + /* load mc2 register: enable dma3 */ + WRITE_RPS1(CMD_WR_REG | (1 << 8) | (MC1/4)); + WRITE_RPS1(MASK_20 | MASK_04); + /* generate interrupt */ + WRITE_RPS1(CMD_INTERRUPT); + /* stop rps1 */ + WRITE_RPS1(CMD_STOP); + + /* we have to do the workaround twice to be sure that + everything is ok */ + for(i = 0; i < 2; i++) { + + /* indicate to the irq handler that we do the workaround */ + saa7146_write(dev, MC2, MASK_31|MASK_15); + + saa7146_write(dev, NUM_LINE_BYTE3, (1<<16)|(2<<0)); + saa7146_write(dev, MC2, MASK_04|MASK_20); + + /* enable rps1 irqs */ + SAA7146_IER_ENABLE(dev,MASK_28); + + /* prepare to wait to be woken up by the irq-handler */ + add_wait_queue(&vv->vbi_wq, &wait); + current->state = TASK_INTERRUPTIBLE; + + /* start rps1 to enable workaround */ + saa7146_write(dev, RPS_ADDR1, dev->d_rps1.dma_handle); + saa7146_write(dev, MC1, (MASK_13 | MASK_29)); + + schedule(); + + DEB_VBI("brs bug workaround %d/1\n", i); + + remove_wait_queue(&vv->vbi_wq, &wait); + current->state = TASK_RUNNING; + + /* disable rps1 irqs */ + SAA7146_IER_DISABLE(dev,MASK_28); + + /* stop video-dma3 */ + saa7146_write(dev, MC1, MASK_20); + + if(signal_pending(current)) { + + DEB_VBI("aborted (rps:0x%08x)\n", + saa7146_read(dev, RPS_ADDR1)); + + /* stop rps1 for sure */ + saa7146_write(dev, MC1, MASK_29); + + pci_free_consistent(dev->pci, 4096, cpu, dma_addr); + return -EINTR; + } + } + + pci_free_consistent(dev->pci, 4096, cpu, dma_addr); + return 0; +} + +static void saa7146_set_vbi_capture(struct saa7146_dev *dev, struct saa7146_buf *buf, struct saa7146_buf *next) +{ + struct saa7146_vv *vv = dev->vv_data; + + struct saa7146_video_dma vdma3; + + int count = 0; + unsigned long e_wait = vv->current_hps_sync == SAA7146_HPS_SYNC_PORT_A ? CMD_E_FID_A : CMD_E_FID_B; + unsigned long o_wait = vv->current_hps_sync == SAA7146_HPS_SYNC_PORT_A ? CMD_O_FID_A : CMD_O_FID_B; + +/* + vdma3.base_even = 0xc8000000+2560*70; + vdma3.base_odd = 0xc8000000; + vdma3.prot_addr = 0xc8000000+2560*164; + vdma3.pitch = 2560; + vdma3.base_page = 0; + vdma3.num_line_byte = (64<<16)|((vbi_pixel_to_capture)<<0); // set above! +*/ + vdma3.base_even = buf->pt[2].offset; + vdma3.base_odd = buf->pt[2].offset + 16 * vbi_pixel_to_capture; + vdma3.prot_addr = buf->pt[2].offset + 16 * 2 * vbi_pixel_to_capture; + vdma3.pitch = vbi_pixel_to_capture; + vdma3.base_page = buf->pt[2].dma | ME1; + vdma3.num_line_byte = (16 << 16) | vbi_pixel_to_capture; + + saa7146_write_out_dma(dev, 3, &vdma3); + + /* write beginning of rps-program */ + count = 0; + + /* wait for o_fid_a/b / e_fid_a/b toggle only if bit 1 is not set */ + + /* we don't wait here for the first field anymore. this is different from the video + capture and might cause that the first buffer is only half filled (with only + one field). but since this is some sort of streaming data, this is not that negative. + but by doing this, we can use the whole engine from videobuf-dma-sg.c... */ + +/* + WRITE_RPS1(CMD_PAUSE | CMD_OAN | CMD_SIG1 | e_wait); + WRITE_RPS1(CMD_PAUSE | CMD_OAN | CMD_SIG1 | o_wait); +*/ + /* set bit 1 */ + WRITE_RPS1(CMD_WR_REG | (1 << 8) | (MC2/4)); + WRITE_RPS1(MASK_28 | MASK_12); + + /* turn on video-dma3 */ + WRITE_RPS1(CMD_WR_REG_MASK | (MC1/4)); + WRITE_RPS1(MASK_04 | MASK_20); /* => mask */ + WRITE_RPS1(MASK_04 | MASK_20); /* => values */ + + /* wait for o_fid_a/b / e_fid_a/b toggle */ + WRITE_RPS1(CMD_PAUSE | o_wait); + WRITE_RPS1(CMD_PAUSE | e_wait); + + /* generate interrupt */ + WRITE_RPS1(CMD_INTERRUPT); + + /* stop */ + WRITE_RPS1(CMD_STOP); + + /* enable rps1 irqs */ + SAA7146_IER_ENABLE(dev, MASK_28); + + /* write the address of the rps-program */ + saa7146_write(dev, RPS_ADDR1, dev->d_rps1.dma_handle); + + /* turn on rps */ + saa7146_write(dev, MC1, (MASK_13 | MASK_29)); +} + +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; + + DEB_VBI("dev:%p, buf:%p, next:%p\n", dev, buf, next); + saa7146_set_vbi_capture(dev,buf,next); + + mod_timer(&vv->vbi_q.timeout, jiffies+BUFFER_TIMEOUT); + return 0; +} + +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_buf *buf = (struct saa7146_buf *)vb; + + int err = 0; + int lines, llength, size; + + lines = 16 * 2 ; /* 2 fields */ + llength = vbi_pixel_to_capture; + size = lines * llength; + + DEB_VBI("vb:%p\n", vb); + + if (0 != buf->vb.baddr && buf->vb.bsize < size) { + DEB_VBI("size mismatch\n"); + return -EINVAL; + } + + if (buf->vb.size != size) + saa7146_dma_free(dev,q,buf); + + if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { + struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb); + + buf->vb.width = llength; + buf->vb.height = lines; + buf->vb.size = size; + buf->vb.field = field; // FIXME: check this + + saa7146_pgtable_free(dev->pci, &buf->pt[2]); + saa7146_pgtable_alloc(dev->pci, &buf->pt[2]); + + err = videobuf_iolock(q,&buf->vb, NULL); + if (err) + goto oops; + err = saa7146_pgtable_build_single(dev->pci, &buf->pt[2], + dma->sglist, dma->sglen); + if (0 != err) + return err; + } + buf->vb.state = VIDEOBUF_PREPARED; + buf->activate = buffer_activate; + + return 0; + + oops: + DEB_VBI("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) +{ + int llength,lines; + + lines = 16 * 2 ; /* 2 fields */ + llength = vbi_pixel_to_capture; + + *size = lines * llength; + *count = 2; + + DEB_VBI("count:%d, size:%d\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_VBI("vb:%p\n", vb); + saa7146_buffer_queue(dev,&vv->vbi_q,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_VBI("vb:%p\n", vb); + saa7146_dma_free(dev,q,buf); +} + +static struct videobuf_queue_ops vbi_qops = { + .buf_setup = buffer_setup, + .buf_prepare = buffer_prepare, + .buf_queue = buffer_queue, + .buf_release = buffer_release, +}; + +/* ------------------------------------------------------------------ */ + +static void vbi_stop(struct saa7146_fh *fh, struct file *file) +{ + struct saa7146_dev *dev = fh->dev; + struct saa7146_vv *vv = dev->vv_data; + unsigned long flags; + DEB_VBI("dev:%p, fh:%p\n", dev, fh); + + spin_lock_irqsave(&dev->slock,flags); + + /* disable rps1 */ + saa7146_write(dev, MC1, MASK_29); + + /* disable rps1 irqs */ + SAA7146_IER_DISABLE(dev, MASK_28); + + /* shut down dma 3 transfers */ + saa7146_write(dev, MC1, MASK_20); + + if (vv->vbi_q.curr) { + saa7146_buffer_finish(dev,&vv->vbi_q,VIDEOBUF_DONE); + } + + videobuf_queue_cancel(&fh->vbi_q); + + vv->vbi_streaming = NULL; + + del_timer(&vv->vbi_q.timeout); + del_timer(&fh->vbi_read_timeout); + + spin_unlock_irqrestore(&dev->slock, flags); +} + +static void vbi_read_timeout(unsigned long data) +{ + struct file *file = (struct file*)data; + struct saa7146_fh *fh = file->private_data; + struct saa7146_dev *dev = fh->dev; + + DEB_VBI("dev:%p, fh:%p\n", dev, fh); + + vbi_stop(fh, file); +} + +static void vbi_init(struct saa7146_dev *dev, struct saa7146_vv *vv) +{ + DEB_VBI("dev:%p\n", dev); + + INIT_LIST_HEAD(&vv->vbi_q.queue); + + init_timer(&vv->vbi_q.timeout); + vv->vbi_q.timeout.function = saa7146_buffer_timeout; + vv->vbi_q.timeout.data = (unsigned long)(&vv->vbi_q); + vv->vbi_q.dev = dev; + + init_waitqueue_head(&vv->vbi_wq); +} + +static int vbi_open(struct saa7146_dev *dev, struct file *file) +{ + struct saa7146_fh *fh = file->private_data; + + u32 arbtr_ctrl = saa7146_read(dev, PCI_BT_V1); + int ret = 0; + + DEB_VBI("dev:%p, fh:%p\n", dev, fh); + + ret = saa7146_res_get(fh, RESOURCE_DMA3_BRS); + if (0 == ret) { + DEB_S("cannot get vbi RESOURCE_DMA3_BRS resource\n"); + return -EBUSY; + } + + /* adjust arbitrition control for video dma 3 */ + arbtr_ctrl &= ~0x1f0000; + arbtr_ctrl |= 0x1d0000; + saa7146_write(dev, PCI_BT_V1, arbtr_ctrl); + saa7146_write(dev, MC2, (MASK_04|MASK_20)); + + memset(&fh->vbi_fmt,0,sizeof(fh->vbi_fmt)); + + fh->vbi_fmt.sampling_rate = 27000000; + fh->vbi_fmt.offset = 248; /* todo */ + fh->vbi_fmt.samples_per_line = vbi_pixel_to_capture; + fh->vbi_fmt.sample_format = V4L2_PIX_FMT_GREY; + + /* fixme: this only works for PAL */ + fh->vbi_fmt.start[0] = 5; + fh->vbi_fmt.count[0] = 16; + fh->vbi_fmt.start[1] = 312; + fh->vbi_fmt.count[1] = 16; + + videobuf_queue_sg_init(&fh->vbi_q, &vbi_qops, + &dev->pci->dev, &dev->slock, + V4L2_BUF_TYPE_VBI_CAPTURE, + V4L2_FIELD_SEQ_TB, // FIXME: does this really work? + sizeof(struct saa7146_buf), + file, &dev->v4l2_lock); + + init_timer(&fh->vbi_read_timeout); + fh->vbi_read_timeout.function = vbi_read_timeout; + fh->vbi_read_timeout.data = (unsigned long)file; + + /* initialize the brs */ + if ( 0 != (SAA7146_USE_PORT_B_FOR_VBI & dev->ext_vv_data->flags)) { + saa7146_write(dev, BRS_CTRL, MASK_30|MASK_29 | (7 << 19)); + } else { + saa7146_write(dev, BRS_CTRL, 0x00000001); + + if (0 != (ret = vbi_workaround(dev))) { + DEB_VBI("vbi workaround failed!\n"); + /* return ret;*/ + } + } + + /* upload brs register */ + saa7146_write(dev, MC2, (MASK_08|MASK_24)); + return 0; +} + +static void vbi_close(struct saa7146_dev *dev, struct file *file) +{ + struct saa7146_fh *fh = file->private_data; + struct saa7146_vv *vv = dev->vv_data; + DEB_VBI("dev:%p, fh:%p\n", dev, fh); + + if( fh == vv->vbi_streaming ) { + vbi_stop(fh, file); + } + saa7146_res_free(fh, RESOURCE_DMA3_BRS); +} + +static void vbi_irq_done(struct saa7146_dev *dev, unsigned long status) +{ + struct saa7146_vv *vv = dev->vv_data; + spin_lock(&dev->slock); + + if (vv->vbi_q.curr) { + DEB_VBI("dev:%p, curr:%p\n", dev, vv->vbi_q.curr); + /* this must be += 2, one count for each field */ + vv->vbi_fieldcount+=2; + vv->vbi_q.curr->vb.field_count = vv->vbi_fieldcount; + saa7146_buffer_finish(dev,&vv->vbi_q,VIDEOBUF_DONE); + } else { + DEB_VBI("dev:%p\n", dev); + } + saa7146_buffer_next(dev,&vv->vbi_q,1); + + spin_unlock(&dev->slock); +} + +static ssize_t vbi_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_VBI("dev:%p, fh:%p\n", dev, fh); + + if( NULL == vv->vbi_streaming ) { + // fixme: check if dma3 is available + // fixme: activate vbi engine here if necessary. (really?) + vv->vbi_streaming = fh; + } + + if( fh != vv->vbi_streaming ) { + DEB_VBI("open %p is already using vbi capture\n", + vv->vbi_streaming); + return -EBUSY; + } + + mod_timer(&fh->vbi_read_timeout, jiffies+BUFFER_TIMEOUT); + ret = videobuf_read_stream(&fh->vbi_q, data, count, ppos, 1, + file->f_flags & O_NONBLOCK); +/* + printk("BASE_ODD3: 0x%08x\n", saa7146_read(dev, BASE_ODD3)); + printk("BASE_EVEN3: 0x%08x\n", saa7146_read(dev, BASE_EVEN3)); + printk("PROT_ADDR3: 0x%08x\n", saa7146_read(dev, PROT_ADDR3)); + printk("PITCH3: 0x%08x\n", saa7146_read(dev, PITCH3)); + printk("BASE_PAGE3: 0x%08x\n", saa7146_read(dev, BASE_PAGE3)); + printk("NUM_LINE_BYTE3: 0x%08x\n", saa7146_read(dev, NUM_LINE_BYTE3)); + printk("BRS_CTRL: 0x%08x\n", saa7146_read(dev, BRS_CTRL)); +*/ + return ret; +} + +struct saa7146_use_ops saa7146_vbi_uops = { + .init = vbi_init, + .open = vbi_open, + .release = vbi_close, + .irq_done = vbi_irq_done, + .read = vbi_read, +}; |