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path: root/drivers/media/pci/cx88/cx88-vbi.c
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Diffstat (limited to 'drivers/media/pci/cx88/cx88-vbi.c')
-rw-r--r--drivers/media/pci/cx88/cx88-vbi.c245
1 files changed, 245 insertions, 0 deletions
diff --git a/drivers/media/pci/cx88/cx88-vbi.c b/drivers/media/pci/cx88/cx88-vbi.c
new file mode 100644
index 00000000000..f8f8389c036
--- /dev/null
+++ b/drivers/media/pci/cx88/cx88-vbi.c
@@ -0,0 +1,245 @@
+/*
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include "cx88.h"
+
+static unsigned int vbibufs = 4;
+module_param(vbibufs,int,0644);
+MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32");
+
+static unsigned int vbi_debug;
+module_param(vbi_debug,int,0644);
+MODULE_PARM_DESC(vbi_debug,"enable debug messages [vbi]");
+
+#define dprintk(level,fmt, arg...) if (vbi_debug >= level) \
+ printk(KERN_DEBUG "%s: " fmt, dev->core->name , ## arg)
+
+/* ------------------------------------------------------------------ */
+
+int cx8800_vbi_fmt (struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct cx8800_fh *fh = priv;
+ struct cx8800_dev *dev = fh->dev;
+
+ f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
+ f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
+ f->fmt.vbi.offset = 244;
+ f->fmt.vbi.count[0] = VBI_LINE_COUNT;
+ f->fmt.vbi.count[1] = VBI_LINE_COUNT;
+
+ if (dev->core->tvnorm & V4L2_STD_525_60) {
+ /* ntsc */
+ f->fmt.vbi.sampling_rate = 28636363;
+ f->fmt.vbi.start[0] = 10;
+ f->fmt.vbi.start[1] = 273;
+
+ } else if (dev->core->tvnorm & V4L2_STD_625_50) {
+ /* pal */
+ f->fmt.vbi.sampling_rate = 35468950;
+ f->fmt.vbi.start[0] = 7 -1;
+ f->fmt.vbi.start[1] = 319 -1;
+ }
+ return 0;
+}
+
+static int cx8800_start_vbi_dma(struct cx8800_dev *dev,
+ struct cx88_dmaqueue *q,
+ struct cx88_buffer *buf)
+{
+ struct cx88_core *core = dev->core;
+
+ /* setup fifo + format */
+ cx88_sram_channel_setup(dev->core, &cx88_sram_channels[SRAM_CH24],
+ buf->vb.width, buf->risc.dma);
+
+ cx_write(MO_VBOS_CONTROL, ( (1 << 18) | // comb filter delay fixup
+ (1 << 15) | // enable vbi capture
+ (1 << 11) ));
+
+ /* reset counter */
+ cx_write(MO_VBI_GPCNTRL, GP_COUNT_CONTROL_RESET);
+ q->count = 1;
+
+ /* enable irqs */
+ cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_VIDINT);
+ cx_set(MO_VID_INTMSK, 0x0f0088);
+
+ /* enable capture */
+ cx_set(VID_CAPTURE_CONTROL,0x18);
+
+ /* start dma */
+ cx_set(MO_DEV_CNTRL2, (1<<5));
+ cx_set(MO_VID_DMACNTRL, 0x88);
+
+ return 0;
+}
+
+int cx8800_stop_vbi_dma(struct cx8800_dev *dev)
+{
+ struct cx88_core *core = dev->core;
+
+ /* stop dma */
+ cx_clear(MO_VID_DMACNTRL, 0x88);
+
+ /* disable capture */
+ cx_clear(VID_CAPTURE_CONTROL,0x18);
+
+ /* disable irqs */
+ cx_clear(MO_PCI_INTMSK, PCI_INT_VIDINT);
+ cx_clear(MO_VID_INTMSK, 0x0f0088);
+ return 0;
+}
+
+int cx8800_restart_vbi_queue(struct cx8800_dev *dev,
+ struct cx88_dmaqueue *q)
+{
+ struct cx88_buffer *buf;
+
+ if (list_empty(&q->active))
+ return 0;
+
+ buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
+ dprintk(2,"restart_queue [%p/%d]: restart dma\n",
+ buf, buf->vb.i);
+ cx8800_start_vbi_dma(dev, q, buf);
+ list_for_each_entry(buf, &q->active, vb.queue)
+ buf->count = q->count++;
+ mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
+ return 0;
+}
+
+void cx8800_vbi_timeout(unsigned long data)
+{
+ struct cx8800_dev *dev = (struct cx8800_dev*)data;
+ struct cx88_core *core = dev->core;
+ struct cx88_dmaqueue *q = &dev->vbiq;
+ struct cx88_buffer *buf;
+ unsigned long flags;
+
+ cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH24]);
+
+ cx_clear(MO_VID_DMACNTRL, 0x88);
+ cx_clear(VID_CAPTURE_CONTROL, 0x18);
+
+ spin_lock_irqsave(&dev->slock,flags);
+ while (!list_empty(&q->active)) {
+ buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
+ list_del(&buf->vb.queue);
+ buf->vb.state = VIDEOBUF_ERROR;
+ wake_up(&buf->vb.done);
+ printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->core->name,
+ buf, buf->vb.i, (unsigned long)buf->risc.dma);
+ }
+ cx8800_restart_vbi_queue(dev,q);
+ spin_unlock_irqrestore(&dev->slock,flags);
+}
+
+/* ------------------------------------------------------------------ */
+
+static int
+vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
+{
+ *size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
+ if (0 == *count)
+ *count = vbibufs;
+ if (*count < 2)
+ *count = 2;
+ if (*count > 32)
+ *count = 32;
+ return 0;
+}
+
+static int
+vbi_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
+ enum v4l2_field field)
+{
+ struct cx8800_fh *fh = q->priv_data;
+ struct cx8800_dev *dev = fh->dev;
+ struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
+ unsigned int size;
+ int rc;
+
+ size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
+ if (0 != buf->vb.baddr && buf->vb.bsize < size)
+ return -EINVAL;
+
+ if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
+ struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
+ buf->vb.width = VBI_LINE_LENGTH;
+ buf->vb.height = VBI_LINE_COUNT;
+ buf->vb.size = size;
+ buf->vb.field = V4L2_FIELD_SEQ_TB;
+
+ if (0 != (rc = videobuf_iolock(q,&buf->vb,NULL)))
+ goto fail;
+ cx88_risc_buffer(dev->pci, &buf->risc,
+ dma->sglist,
+ 0, buf->vb.width * buf->vb.height,
+ buf->vb.width, 0,
+ buf->vb.height);
+ }
+ buf->vb.state = VIDEOBUF_PREPARED;
+ return 0;
+
+ fail:
+ cx88_free_buffer(q,buf);
+ return rc;
+}
+
+static void
+vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
+{
+ struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
+ struct cx88_buffer *prev;
+ struct cx8800_fh *fh = vq->priv_data;
+ struct cx8800_dev *dev = fh->dev;
+ struct cx88_dmaqueue *q = &dev->vbiq;
+
+ /* add jump to stopper */
+ buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
+ buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
+
+ if (list_empty(&q->active)) {
+ list_add_tail(&buf->vb.queue,&q->active);
+ cx8800_start_vbi_dma(dev, q, buf);
+ buf->vb.state = VIDEOBUF_ACTIVE;
+ buf->count = q->count++;
+ mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
+ dprintk(2,"[%p/%d] vbi_queue - first active\n",
+ buf, buf->vb.i);
+
+ } else {
+ prev = list_entry(q->active.prev, struct cx88_buffer, vb.queue);
+ list_add_tail(&buf->vb.queue,&q->active);
+ buf->vb.state = VIDEOBUF_ACTIVE;
+ buf->count = q->count++;
+ prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
+ dprintk(2,"[%p/%d] buffer_queue - append to active\n",
+ buf, buf->vb.i);
+ }
+}
+
+static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
+{
+ struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
+
+ cx88_free_buffer(q,buf);
+}
+
+const struct videobuf_queue_ops cx8800_vbi_qops = {
+ .buf_setup = vbi_setup,
+ .buf_prepare = vbi_prepare,
+ .buf_queue = vbi_queue,
+ .buf_release = vbi_release,
+};
+
+/* ------------------------------------------------------------------ */
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-29 00:20:01 +0000