summaryrefslogtreecommitdiffstats
path: root/drivers/media/video/cx23885/cx23885-vbi.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/video/cx23885/cx23885-vbi.c')
-rw-r--r--drivers/media/video/cx23885/cx23885-vbi.c258
1 files changed, 258 insertions, 0 deletions
diff --git a/drivers/media/video/cx23885/cx23885-vbi.c b/drivers/media/video/cx23885/cx23885-vbi.c
new file mode 100644
index 00000000000..e36e3fcae2f
--- /dev/null
+++ b/drivers/media/video/cx23885/cx23885-vbi.c
@@ -0,0 +1,258 @@
+/*
+ * Driver for the Conexant CX23885 PCIe bridge
+ *
+ * Copyright (c) 2007 Steven Toth <stoth@hauppauge.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+
+#include "cx23885.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...)\
+ do { if (vbi_debug >= level)\
+ printk(KERN_DEBUG "%s/0: " fmt, dev->name, ## arg);\
+ } while (0)
+
+/* ------------------------------------------------------------------ */
+
+int cx23885_vbi_fmt(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct cx23885_fh *fh = priv;
+ struct cx23885_dev *dev = fh->dev;
+
+ if (dev->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->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 cx23885_start_vbi_dma(struct cx23885_dev *dev,
+ struct cx23885_dmaqueue *q,
+ struct cx23885_buffer *buf)
+{
+ /* setup fifo + format */
+ cx23885_sram_channel_setup(dev, &dev->sram_channels[SRAM_CH02],
+ buf->vb.width, buf->risc.dma);
+
+ /* reset counter */
+ q->count = 1;
+
+ /* enable irqs */
+ cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | 0x01);
+ cx_set(VID_A_INT_MSK, 0x000022);
+
+ /* start dma */
+ cx_set(DEV_CNTRL2, (1<<5));
+ cx_set(VID_A_DMA_CTL, 0x00000022);
+
+ return 0;
+}
+
+int cx23885_stop_vbi_dma(struct cx23885_dev *dev)
+{
+ /* stop dma */
+ cx_clear(VID_A_DMA_CTL, 0x00000022);
+
+ /* disable irqs */
+ cx_clear(PCI_INT_MSK, 0x000001);
+ cx_clear(VID_A_INT_MSK, 0x00000022);
+ return 0;
+}
+
+int cx23885_restart_vbi_queue(struct cx23885_dev *dev,
+ struct cx23885_dmaqueue *q)
+{
+ struct cx23885_buffer *buf;
+ struct list_head *item;
+
+ if (list_empty(&q->active))
+ return 0;
+
+ buf = list_entry(q->active.next, struct cx23885_buffer, vb.queue);
+ dprintk(2, "restart_queue [%p/%d]: restart dma\n",
+ buf, buf->vb.i);
+ cx23885_start_vbi_dma(dev, q, buf);
+ list_for_each(item, &q->active) {
+ buf = list_entry(item, struct cx23885_buffer, vb.queue);
+ buf->count = q->count++;
+ }
+ mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
+ return 0;
+}
+
+void cx23885_vbi_timeout(unsigned long data)
+{
+ struct cx23885_dev *dev = (struct cx23885_dev *)data;
+ struct cx23885_dmaqueue *q = &dev->vbiq;
+ struct cx23885_buffer *buf;
+ unsigned long flags;
+
+ cx23885_sram_channel_dump(dev, &dev->sram_channels[SRAM_CH02]);
+
+ cx_clear(VID_A_DMA_CTL, 0x22);
+
+ spin_lock_irqsave(&dev->slock, flags);
+ while (!list_empty(&q->active)) {
+ buf = list_entry(q->active.next, struct cx23885_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->name,
+ buf, buf->vb.i, (unsigned long)buf->risc.dma);
+ }
+ cx23885_restart_vbi_queue(dev, q);
+ spin_unlock_irqrestore(&dev->slock, flags);
+}
+
+/* ------------------------------------------------------------------ */
+#define VBI_LINE_LENGTH 2048
+#define VBI_LINE_COUNT 17
+
+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 cx23885_fh *fh = q->priv_data;
+ struct cx23885_dev *dev = fh->dev;
+ struct cx23885_buffer *buf = container_of(vb,
+ struct cx23885_buffer, vb);
+ struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->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) {
+ buf->vb.width = VBI_LINE_LENGTH;
+ buf->vb.height = VBI_LINE_COUNT;
+ buf->vb.size = size;
+ buf->vb.field = V4L2_FIELD_SEQ_TB;
+
+ rc = videobuf_iolock(q, &buf->vb, NULL);
+ if (0 != rc)
+ goto fail;
+ cx23885_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:
+ cx23885_free_buffer(q, buf);
+ return rc;
+}
+
+static void
+vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
+{
+ struct cx23885_buffer *buf =
+ container_of(vb, struct cx23885_buffer, vb);
+ struct cx23885_buffer *prev;
+ struct cx23885_fh *fh = vq->priv_data;
+ struct cx23885_dev *dev = fh->dev;
+ struct cx23885_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);
+ buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */
+
+ if (list_empty(&q->active)) {
+ list_add_tail(&buf->vb.queue, &q->active);
+ cx23885_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 cx23885_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);
+ prev->risc.jmp[2] = cpu_to_le32(0); /* Bits 63-32 */
+ 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 cx23885_buffer *buf =
+ container_of(vb, struct cx23885_buffer, vb);
+
+ cx23885_free_buffer(q, buf);
+}
+
+struct videobuf_queue_ops cx23885_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 v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-19 23:56:43 +0000