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/*
* $Id: cx88-vbi.c,v 1.17 2005/06/12 04:19:19 mchehab Exp $
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/slab.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 = 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->core->name , ## arg)
/* ------------------------------------------------------------------ */
void cx8800_vbi_fmt(struct cx8800_dev *dev, struct v4l2_format *f)
{
memset(&f->fmt.vbi,0,sizeof(f->fmt.vbi));
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->id & V4L2_STD_525_60) {
/* ntsc */
f->fmt.vbi.sampling_rate = 28636363;
f->fmt.vbi.start[0] = 10 -1;
f->fmt.vbi.start[1] = 273 -1;
} else if (dev->core->tvnorm->id & 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;
}
}
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 | 0x01);
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, 0x000001);
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;
struct list_head *item;
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(item,&q->active) {
buf = list_entry(item, struct cx88_buffer, 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 = STATE_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 (STATE_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;
if (0 != (rc = videobuf_iolock(dev->pci,&buf->vb,NULL)))
goto fail;
cx88_risc_buffer(dev->pci, &buf->risc,
buf->vb.dma.sglist,
0, buf->vb.width * buf->vb.height,
buf->vb.width, 0,
buf->vb.height);
}
buf->vb.state = STATE_PREPARED;
return 0;
fail:
cx88_free_buffer(dev->pci,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 = STATE_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 = STATE_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);
struct cx8800_fh *fh = q->priv_data;
cx88_free_buffer(fh->dev->pci,buf);
}
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:
*/
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