V4L/DVB (7009): cx23885: Video and VBI related files

cx23885: Video and VBI related files.

Signed-off-by: Steven Toth <stoth@hauppauge.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 256 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 000000000000..32ec9d5bdbd0
--- /dev/null
+++ b/drivers/media/video/cx23885/cx23885-vbi.c
@@ -0,0 +1,256 @@
+/*
+ *  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 = 0;
+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->name , ## arg)
+
+/* ------------------------------------------------------------------ */
+
+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:
+ */