250 lines
6.3 KiB
C
250 lines
6.3 KiB
C
/*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include "cx88.h"
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static unsigned int vbibufs = 4;
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module_param(vbibufs,int,0644);
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MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32");
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static unsigned int vbi_debug = 0;
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module_param(vbi_debug,int,0644);
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MODULE_PARM_DESC(vbi_debug,"enable debug messages [vbi]");
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#define dprintk(level,fmt, arg...) if (vbi_debug >= level) \
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printk(KERN_DEBUG "%s: " fmt, dev->core->name , ## arg)
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/* ------------------------------------------------------------------ */
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int cx8800_vbi_fmt (struct file *file, void *priv,
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struct v4l2_format *f)
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{
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struct cx8800_fh *fh = priv;
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struct cx8800_dev *dev = fh->dev;
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f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
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f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
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f->fmt.vbi.offset = 244;
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f->fmt.vbi.count[0] = VBI_LINE_COUNT;
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f->fmt.vbi.count[1] = VBI_LINE_COUNT;
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if (dev->core->tvnorm & V4L2_STD_525_60) {
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/* ntsc */
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f->fmt.vbi.sampling_rate = 28636363;
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f->fmt.vbi.start[0] = 10;
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f->fmt.vbi.start[1] = 273;
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} else if (dev->core->tvnorm & V4L2_STD_625_50) {
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/* pal */
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f->fmt.vbi.sampling_rate = 35468950;
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f->fmt.vbi.start[0] = 7 -1;
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f->fmt.vbi.start[1] = 319 -1;
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}
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return 0;
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}
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static int cx8800_start_vbi_dma(struct cx8800_dev *dev,
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struct cx88_dmaqueue *q,
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struct cx88_buffer *buf)
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{
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struct cx88_core *core = dev->core;
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/* setup fifo + format */
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cx88_sram_channel_setup(dev->core, &cx88_sram_channels[SRAM_CH24],
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buf->vb.width, buf->risc.dma);
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cx_write(MO_VBOS_CONTROL, ( (1 << 18) | // comb filter delay fixup
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(1 << 15) | // enable vbi capture
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(1 << 11) ));
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/* reset counter */
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cx_write(MO_VBI_GPCNTRL, GP_COUNT_CONTROL_RESET);
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q->count = 1;
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/* enable irqs */
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cx_set(MO_PCI_INTMSK, core->pci_irqmask | 0x01);
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cx_set(MO_VID_INTMSK, 0x0f0088);
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/* enable capture */
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cx_set(VID_CAPTURE_CONTROL,0x18);
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/* start dma */
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cx_set(MO_DEV_CNTRL2, (1<<5));
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cx_set(MO_VID_DMACNTRL, 0x88);
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return 0;
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}
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int cx8800_stop_vbi_dma(struct cx8800_dev *dev)
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{
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struct cx88_core *core = dev->core;
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/* stop dma */
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cx_clear(MO_VID_DMACNTRL, 0x88);
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/* disable capture */
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cx_clear(VID_CAPTURE_CONTROL,0x18);
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/* disable irqs */
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cx_clear(MO_PCI_INTMSK, 0x000001);
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cx_clear(MO_VID_INTMSK, 0x0f0088);
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return 0;
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}
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int cx8800_restart_vbi_queue(struct cx8800_dev *dev,
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struct cx88_dmaqueue *q)
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{
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struct cx88_buffer *buf;
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struct list_head *item;
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if (list_empty(&q->active))
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return 0;
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buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
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dprintk(2,"restart_queue [%p/%d]: restart dma\n",
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buf, buf->vb.i);
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cx8800_start_vbi_dma(dev, q, buf);
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list_for_each(item,&q->active) {
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buf = list_entry(item, struct cx88_buffer, vb.queue);
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buf->count = q->count++;
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}
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mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
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return 0;
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}
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void cx8800_vbi_timeout(unsigned long data)
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{
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struct cx8800_dev *dev = (struct cx8800_dev*)data;
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struct cx88_core *core = dev->core;
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struct cx88_dmaqueue *q = &dev->vbiq;
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struct cx88_buffer *buf;
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unsigned long flags;
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cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH24]);
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cx_clear(MO_VID_DMACNTRL, 0x88);
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cx_clear(VID_CAPTURE_CONTROL, 0x18);
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spin_lock_irqsave(&dev->slock,flags);
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while (!list_empty(&q->active)) {
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buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
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list_del(&buf->vb.queue);
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buf->vb.state = STATE_ERROR;
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wake_up(&buf->vb.done);
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printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->core->name,
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buf, buf->vb.i, (unsigned long)buf->risc.dma);
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}
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cx8800_restart_vbi_queue(dev,q);
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spin_unlock_irqrestore(&dev->slock,flags);
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}
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/* ------------------------------------------------------------------ */
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static int
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vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
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{
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*size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
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if (0 == *count)
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*count = vbibufs;
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if (*count < 2)
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*count = 2;
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if (*count > 32)
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*count = 32;
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return 0;
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}
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static int
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vbi_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
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enum v4l2_field field)
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{
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struct cx8800_fh *fh = q->priv_data;
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struct cx8800_dev *dev = fh->dev;
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struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
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unsigned int size;
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int rc;
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size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
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if (0 != buf->vb.baddr && buf->vb.bsize < size)
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return -EINVAL;
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if (STATE_NEEDS_INIT == buf->vb.state) {
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buf->vb.width = VBI_LINE_LENGTH;
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buf->vb.height = VBI_LINE_COUNT;
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buf->vb.size = size;
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buf->vb.field = V4L2_FIELD_SEQ_TB;
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if (0 != (rc = videobuf_iolock(q,&buf->vb,NULL)))
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goto fail;
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cx88_risc_buffer(dev->pci, &buf->risc,
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buf->vb.dma.sglist,
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0, buf->vb.width * buf->vb.height,
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buf->vb.width, 0,
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buf->vb.height);
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}
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buf->vb.state = STATE_PREPARED;
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return 0;
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fail:
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cx88_free_buffer(q,buf);
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return rc;
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}
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static void
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vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
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{
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struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
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struct cx88_buffer *prev;
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struct cx8800_fh *fh = vq->priv_data;
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struct cx8800_dev *dev = fh->dev;
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struct cx88_dmaqueue *q = &dev->vbiq;
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/* add jump to stopper */
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buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
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buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
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if (list_empty(&q->active)) {
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list_add_tail(&buf->vb.queue,&q->active);
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cx8800_start_vbi_dma(dev, q, buf);
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buf->vb.state = STATE_ACTIVE;
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buf->count = q->count++;
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mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
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dprintk(2,"[%p/%d] vbi_queue - first active\n",
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buf, buf->vb.i);
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} else {
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prev = list_entry(q->active.prev, struct cx88_buffer, vb.queue);
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list_add_tail(&buf->vb.queue,&q->active);
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buf->vb.state = STATE_ACTIVE;
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buf->count = q->count++;
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prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
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dprintk(2,"[%p/%d] buffer_queue - append to active\n",
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buf, buf->vb.i);
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}
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}
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static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
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{
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struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
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cx88_free_buffer(q,buf);
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}
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struct videobuf_queue_ops cx8800_vbi_qops = {
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.buf_setup = vbi_setup,
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.buf_prepare = vbi_prepare,
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.buf_queue = vbi_queue,
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.buf_release = vbi_release,
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};
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/* ------------------------------------------------------------------ */
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/*
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* Local variables:
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* c-basic-offset: 8
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* End:
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*/
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