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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.c235
1 files changed, 235 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 0000000000..469aeaa725
--- /dev/null
+++ b/drivers/media/pci/cx88/cx88-vbi.c
@@ -0,0 +1,235 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ */
+
+#include "cx88.h"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+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...) do { \
+ if (vbi_debug >= level) \
+ printk(KERN_DEBUG pr_fmt("%s: vbi:" fmt), \
+ __func__, ##arg); \
+} while (0)
+
+/* ------------------------------------------------------------------ */
+
+int cx8800_vbi_fmt(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct cx8800_dev *dev = video_drvdata(file);
+
+ f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
+ f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
+ f->fmt.vbi.offset = 244;
+
+ 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;
+ f->fmt.vbi.count[0] = VBI_LINE_NTSC_COUNT;
+ f->fmt.vbi.count[1] = VBI_LINE_NTSC_COUNT;
+
+ } else if (dev->core->tvnorm & V4L2_STD_625_50) {
+ /* pal */
+ f->fmt.vbi.sampling_rate = 35468950;
+ f->fmt.vbi.start[0] = V4L2_VBI_ITU_625_F1_START + 5;
+ f->fmt.vbi.start[1] = V4L2_VBI_ITU_625_F2_START + 5;
+ f->fmt.vbi.count[0] = VBI_LINE_PAL_COUNT;
+ f->fmt.vbi.count[1] = VBI_LINE_PAL_COUNT;
+ }
+ 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],
+ VBI_LINE_LENGTH, 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 = 0;
+
+ /* 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;
+}
+
+void 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);
+}
+
+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, list);
+ dprintk(2, "restart_queue [%p/%d]: restart dma\n",
+ buf, buf->vb.vb2_buf.index);
+ cx8800_start_vbi_dma(dev, q, buf);
+ return 0;
+}
+
+/* ------------------------------------------------------------------ */
+
+static int queue_setup(struct vb2_queue *q,
+ unsigned int *num_buffers, unsigned int *num_planes,
+ unsigned int sizes[], struct device *alloc_devs[])
+{
+ struct cx8800_dev *dev = q->drv_priv;
+
+ *num_planes = 1;
+ if (dev->core->tvnorm & V4L2_STD_525_60)
+ sizes[0] = VBI_LINE_NTSC_COUNT * VBI_LINE_LENGTH * 2;
+ else
+ sizes[0] = VBI_LINE_PAL_COUNT * VBI_LINE_LENGTH * 2;
+ return 0;
+}
+
+static int buffer_prepare(struct vb2_buffer *vb)
+{
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct cx8800_dev *dev = vb->vb2_queue->drv_priv;
+ struct cx88_buffer *buf = container_of(vbuf, struct cx88_buffer, vb);
+ struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0);
+ unsigned int lines;
+ unsigned int size;
+
+ if (dev->core->tvnorm & V4L2_STD_525_60)
+ lines = VBI_LINE_NTSC_COUNT;
+ else
+ lines = VBI_LINE_PAL_COUNT;
+ size = lines * VBI_LINE_LENGTH * 2;
+ if (vb2_plane_size(vb, 0) < size)
+ return -EINVAL;
+ vb2_set_plane_payload(vb, 0, size);
+
+ return cx88_risc_buffer(dev->pci, &buf->risc, sgt->sgl,
+ 0, VBI_LINE_LENGTH * lines,
+ VBI_LINE_LENGTH, 0,
+ lines);
+}
+
+static void buffer_finish(struct vb2_buffer *vb)
+{
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct cx8800_dev *dev = vb->vb2_queue->drv_priv;
+ struct cx88_buffer *buf = container_of(vbuf, struct cx88_buffer, vb);
+ struct cx88_riscmem *risc = &buf->risc;
+
+ if (risc->cpu)
+ dma_free_coherent(&dev->pci->dev, risc->size, risc->cpu,
+ risc->dma);
+ memset(risc, 0, sizeof(*risc));
+}
+
+static void buffer_queue(struct vb2_buffer *vb)
+{
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct cx8800_dev *dev = vb->vb2_queue->drv_priv;
+ struct cx88_buffer *buf = container_of(vbuf, struct cx88_buffer, vb);
+ struct cx88_buffer *prev;
+ struct cx88_dmaqueue *q = &dev->vbiq;
+
+ /* add jump to start */
+ buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 8);
+ buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC);
+ buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 8);
+
+ if (list_empty(&q->active)) {
+ list_add_tail(&buf->list, &q->active);
+ dprintk(2, "[%p/%d] vbi_queue - first active\n",
+ buf, buf->vb.vb2_buf.index);
+
+ } else {
+ buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1);
+ prev = list_entry(q->active.prev, struct cx88_buffer, list);
+ list_add_tail(&buf->list, &q->active);
+ prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
+ dprintk(2, "[%p/%d] buffer_queue - append to active\n",
+ buf, buf->vb.vb2_buf.index);
+ }
+}
+
+static int start_streaming(struct vb2_queue *q, unsigned int count)
+{
+ struct cx8800_dev *dev = q->drv_priv;
+ struct cx88_dmaqueue *dmaq = &dev->vbiq;
+ struct cx88_buffer *buf = list_entry(dmaq->active.next,
+ struct cx88_buffer, list);
+
+ cx8800_start_vbi_dma(dev, dmaq, buf);
+ return 0;
+}
+
+static void stop_streaming(struct vb2_queue *q)
+{
+ struct cx8800_dev *dev = q->drv_priv;
+ struct cx88_core *core = dev->core;
+ struct cx88_dmaqueue *dmaq = &dev->vbiq;
+ unsigned long flags;
+
+ cx_clear(MO_VID_DMACNTRL, 0x11);
+ cx_clear(VID_CAPTURE_CONTROL, 0x06);
+ cx8800_stop_vbi_dma(dev);
+ spin_lock_irqsave(&dev->slock, flags);
+ while (!list_empty(&dmaq->active)) {
+ struct cx88_buffer *buf = list_entry(dmaq->active.next,
+ struct cx88_buffer, list);
+
+ list_del(&buf->list);
+ vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+ }
+ spin_unlock_irqrestore(&dev->slock, flags);
+}
+
+const struct vb2_ops cx8800_vbi_qops = {
+ .queue_setup = queue_setup,
+ .buf_prepare = buffer_prepare,
+ .buf_finish = buffer_finish,
+ .buf_queue = buffer_queue,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .start_streaming = start_streaming,
+ .stop_streaming = stop_streaming,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 10:48:19 +0000