/*
*
* device driver for philips saa7134 based TV cards
* video4linux video interface
*
* (c) 2001,02 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
*
* 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/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include "saa7134-reg.h"
#include "saa7134.h"
/* ------------------------------------------------------------------ */
static unsigned int ts_debug = 0;
module_param(ts_debug, int, 0644);
MODULE_PARM_DESC(ts_debug,"enable debug messages [ts]");
#define dprintk(fmt, arg...) if (ts_debug) \
printk(KERN_DEBUG "%s/ts: " fmt, dev->name , ## arg)
/* ------------------------------------------------------------------ */
static int buffer_activate(struct saa7134_dev *dev,
struct saa7134_buf *buf,
struct saa7134_buf *next)
{
dprintk("buffer_activate [%p]",buf);
buf->vb.state = VIDEOBUF_ACTIVE;
buf->top_seen = 0;
if (NULL == next)
next = buf;
if (V4L2_FIELD_TOP == buf->vb.field) {
dprintk("- [top] buf=%p next=%p\n",buf,next);
saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(buf));
saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(next));
} else {
dprintk("- [bottom] buf=%p next=%p\n",buf,next);
saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(next));
saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(buf));
}
/* start DMA */
saa7134_set_dmabits(dev);
mod_timer(&dev->ts_q.timeout, jiffies+BUFFER_TIMEOUT);
return 0;
}
static int buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
enum v4l2_field field)
{
struct saa7134_dev *dev = q->priv_data;
struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
unsigned int lines, llength, size;
u32 control;
int err;
dprintk("buffer_prepare [%p,%s]\n",buf,v4l2_field_names[field]);
llength = TS_PACKET_SIZE;
lines = dev->ts.nr_packets;
size = lines * llength;
if (0 != buf->vb.baddr && buf->vb.bsize < size)
return -EINVAL;
if (buf->vb.size != size) {
saa7134_dma_free(q,buf);
}
if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
buf->vb.width = llength;
buf->vb.height = lines;
buf->vb.size = size;
buf->pt = &dev->ts.pt_ts;
err = videobuf_iolock(q,&buf->vb,NULL);
if (err)
goto oops;
err = saa7134_pgtable_build(dev->pci,buf->pt,
dma->sglist,
dma->sglen,
saa7134_buffer_startpage(buf));
if (err)
goto oops;
}
/* dma: setup channel 5 (= TS) */
control = SAA7134_RS_CONTROL_BURST_16 |
SAA7134_RS_CONTROL_ME |
(buf->pt->dma >> 12);
saa_writeb(SAA7134_TS_DMA0, ((lines-1)&0xff));
saa_writeb(SAA7134_TS_DMA1, (((lines-1)>>8)&0xff));
saa_writeb(SAA7134_TS_DMA2, ((((lines-1)>>16)&0x3f) | 0x00)); /* TSNOPIT=0, TSCOLAP=0 */
saa_writel(SAA7134_RS_PITCH(5),TS_PACKET_SIZE);
saa_writel(SAA7134_RS_CONTROL(5),control);
buf->vb.state = VIDEOBUF_PREPARED;
buf->activate = buffer_activate;
buf->vb.field = field;
return 0;
oops:
saa7134_dma_free(q,buf);
return err;
}
static int
buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
{
struct saa7134_dev *dev = q->priv_data;
*size = TS_PACKET_SIZE * dev->ts.nr_packets;
if (0 == *count)
*count = dev->ts.nr_bufs;
*count = saa7134_buffer_count(*size,*count);
return 0;
}
static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
{
struct saa7134_dev *dev = q->priv_data;
struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
saa7134_buffer_queue(dev,&dev->ts_q,buf);
}
static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
{
struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
saa7134_dma_free(q,buf);
}
struct videobuf_queue_ops saa7134_ts_qops = {
.buf_setup = buffer_setup,
.buf_prepare = buffer_prepare,
.buf_queue = buffer_queue,
.buf_release = buffer_release,
};
EXPORT_SYMBOL_GPL(saa7134_ts_qops);
/* ----------------------------------------------------------- */
/* exported stuff */
static unsigned int tsbufs = 8;
module_param(tsbufs, int, 0444);
MODULE_PARM_DESC(tsbufs,"number of ts buffers, range 2-32");
static unsigned int ts_nr_packets = 64;
module_param(ts_nr_packets, int, 0444);
MODULE_PARM_DESC(ts_nr_packets,"size of a ts buffers (in ts packets)");
int saa7134_ts_init_hw(struct saa7134_dev *dev)
{
/* deactivate TS softreset */
saa_writeb(SAA7134_TS_SERIAL1, 0x00);
/* TSSOP high active, TSVAL high active, TSLOCK ignored */
saa_writeb(SAA7134_TS_PARALLEL, 0xec);
saa_writeb(SAA7134_TS_PARALLEL_SERIAL, (TS_PACKET_SIZE-1));
saa_writeb(SAA7134_TS_DMA0, ((dev->ts.nr_packets-1)&0xff));
saa_writeb(SAA7134_TS_DMA1, (((dev->ts.nr_packets-1)>>8)&0xff));
/* TSNOPIT=0, TSCOLAP=0 */
saa_writeb(SAA7134_TS_DMA2,
((((dev->ts.nr_packets-1)>>16)&0x3f) | 0x00));
return 0;
}
int saa7134_ts_init1(struct saa7134_dev *dev)
{
/* sanitycheck insmod options */
if (tsbufs < 2)
tsbufs = 2;
if (tsbufs > VIDEO_MAX_FRAME)
tsbufs = VIDEO_MAX_FRAME;
if (ts_nr_packets < 4)
ts_nr_packets = 4;
if (ts_nr_packets > 312)
ts_nr_packets = 312;
dev->ts.nr_bufs = tsbufs;
dev->ts.nr_packets = ts_nr_packets;
INIT_LIST_HEAD(&dev->ts_q.queue);
init_timer(&dev->ts_q.timeout);
dev->ts_q.timeout.function = saa7134_buffer_timeout;
dev->ts_q.timeout.data = (unsigned long)(&dev->ts_q);
dev->ts_q.dev = dev;
dev->ts_q.need_two = 1;
saa7134_pgtable_alloc(dev->pci,&dev->ts.pt_ts);
/* init TS hw */
saa7134_ts_init_hw(dev);
return 0;
}
int saa7134_ts_fini(struct saa7134_dev *dev)
{
saa7134_pgtable_free(dev->pci,&dev->ts.pt_ts);
return 0;
}
void saa7134_irq_ts_done(struct saa7134_dev *dev, unsigned long status)
{
enum v4l2_field field;
spin_lock(&dev->slock);
if (dev->ts_q.curr) {
field = dev->ts_q.curr->vb.field;
if (field == V4L2_FIELD_TOP) {
if ((status & 0x100000) != 0x000000)
goto done;
} else {
if ((status & 0x100000) != 0x100000)
goto done;
}
saa7134_buffer_finish(dev,&dev->ts_q,VIDEOBUF_DONE);
}
saa7134_buffer_next(dev,&dev->ts_q);
done:
spin_unlock(&dev->slock);
}
/* ----------------------------------------------------------- */
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
