329 lines
8.4 KiB
C
329 lines
8.4 KiB
C
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/*
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*
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* device driver for philips saa7134 based TV cards
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* video4linux video interface
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*
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* (c) 2001,02 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include "saa7134-reg.h"
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#include "saa7134.h"
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/* ------------------------------------------------------------------ */
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static unsigned int ts_debug;
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module_param(ts_debug, int, 0644);
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MODULE_PARM_DESC(ts_debug,"enable debug messages [ts]");
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#define dprintk(fmt, arg...) if (ts_debug) \
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printk(KERN_DEBUG "%s/ts: " fmt, dev->name , ## arg)
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/* ------------------------------------------------------------------ */
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static int buffer_activate(struct saa7134_dev *dev,
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struct saa7134_buf *buf,
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struct saa7134_buf *next)
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{
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dprintk("buffer_activate [%p]",buf);
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buf->vb.state = VIDEOBUF_ACTIVE;
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buf->top_seen = 0;
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if (NULL == next)
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next = buf;
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if (V4L2_FIELD_TOP == buf->vb.field) {
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dprintk("- [top] buf=%p next=%p\n",buf,next);
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saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(buf));
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saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(next));
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} else {
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dprintk("- [bottom] buf=%p next=%p\n",buf,next);
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saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(next));
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saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(buf));
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}
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/* start DMA */
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saa7134_set_dmabits(dev);
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mod_timer(&dev->ts_q.timeout, jiffies+TS_BUFFER_TIMEOUT);
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if (!dev->ts_started)
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saa7134_ts_start(dev);
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return 0;
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}
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static int buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
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enum v4l2_field field)
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{
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struct saa7134_dev *dev = q->priv_data;
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struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
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unsigned int lines, llength, size;
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int err;
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dprintk("buffer_prepare [%p,%s]\n",buf,v4l2_field_names[field]);
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llength = TS_PACKET_SIZE;
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lines = dev->ts.nr_packets;
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size = lines * llength;
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if (0 != buf->vb.baddr && buf->vb.bsize < size)
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return -EINVAL;
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if (buf->vb.size != size) {
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saa7134_dma_free(q,buf);
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}
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if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
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struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
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dprintk("buffer_prepare: needs_init\n");
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buf->vb.width = llength;
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buf->vb.height = lines;
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buf->vb.size = size;
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buf->pt = &dev->ts.pt_ts;
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err = videobuf_iolock(q,&buf->vb,NULL);
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if (err)
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goto oops;
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err = saa7134_pgtable_build(dev->pci,buf->pt,
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dma->sglist,
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dma->sglen,
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saa7134_buffer_startpage(buf));
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if (err)
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goto oops;
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}
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buf->vb.state = VIDEOBUF_PREPARED;
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buf->activate = buffer_activate;
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buf->vb.field = field;
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return 0;
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oops:
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saa7134_dma_free(q,buf);
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return err;
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}
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static int
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buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
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{
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struct saa7134_dev *dev = q->priv_data;
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*size = TS_PACKET_SIZE * dev->ts.nr_packets;
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if (0 == *count)
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*count = dev->ts.nr_bufs;
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*count = saa7134_buffer_count(*size,*count);
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return 0;
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}
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static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
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{
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struct saa7134_dev *dev = q->priv_data;
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struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
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saa7134_buffer_queue(dev,&dev->ts_q,buf);
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}
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static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
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{
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struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
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struct saa7134_dev *dev = q->priv_data;
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if (dev->ts_started)
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saa7134_ts_stop(dev);
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saa7134_dma_free(q,buf);
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}
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struct videobuf_queue_ops saa7134_ts_qops = {
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.buf_setup = buffer_setup,
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.buf_prepare = buffer_prepare,
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.buf_queue = buffer_queue,
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.buf_release = buffer_release,
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};
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EXPORT_SYMBOL_GPL(saa7134_ts_qops);
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/* ----------------------------------------------------------- */
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/* exported stuff */
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static unsigned int tsbufs = 8;
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module_param(tsbufs, int, 0444);
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MODULE_PARM_DESC(tsbufs, "number of ts buffers for read/write IO, range 2-32");
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static unsigned int ts_nr_packets = 64;
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module_param(ts_nr_packets, int, 0444);
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MODULE_PARM_DESC(ts_nr_packets,"size of a ts buffers (in ts packets)");
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int saa7134_ts_init_hw(struct saa7134_dev *dev)
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{
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/* deactivate TS softreset */
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saa_writeb(SAA7134_TS_SERIAL1, 0x00);
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/* TSSOP high active, TSVAL high active, TSLOCK ignored */
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saa_writeb(SAA7134_TS_PARALLEL, 0x6c);
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saa_writeb(SAA7134_TS_PARALLEL_SERIAL, (TS_PACKET_SIZE-1));
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saa_writeb(SAA7134_TS_DMA0, ((dev->ts.nr_packets-1)&0xff));
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saa_writeb(SAA7134_TS_DMA1, (((dev->ts.nr_packets-1)>>8)&0xff));
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/* TSNOPIT=0, TSCOLAP=0 */
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saa_writeb(SAA7134_TS_DMA2,
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((((dev->ts.nr_packets-1)>>16)&0x3f) | 0x00));
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return 0;
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}
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int saa7134_ts_init1(struct saa7134_dev *dev)
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{
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/* sanitycheck insmod options */
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if (tsbufs < 2)
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tsbufs = 2;
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if (tsbufs > VIDEO_MAX_FRAME)
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tsbufs = VIDEO_MAX_FRAME;
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if (ts_nr_packets < 4)
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ts_nr_packets = 4;
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if (ts_nr_packets > 312)
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ts_nr_packets = 312;
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dev->ts.nr_bufs = tsbufs;
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dev->ts.nr_packets = ts_nr_packets;
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INIT_LIST_HEAD(&dev->ts_q.queue);
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init_timer(&dev->ts_q.timeout);
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dev->ts_q.timeout.function = saa7134_buffer_timeout;
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dev->ts_q.timeout.data = (unsigned long)(&dev->ts_q);
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dev->ts_q.dev = dev;
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dev->ts_q.need_two = 1;
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dev->ts_started = 0;
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saa7134_pgtable_alloc(dev->pci,&dev->ts.pt_ts);
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/* init TS hw */
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saa7134_ts_init_hw(dev);
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return 0;
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}
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/* Function for stop TS */
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int saa7134_ts_stop(struct saa7134_dev *dev)
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{
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dprintk("TS stop\n");
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BUG_ON(!dev->ts_started);
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/* Stop TS stream */
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switch (saa7134_boards[dev->board].ts_type) {
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case SAA7134_MPEG_TS_PARALLEL:
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saa_writeb(SAA7134_TS_PARALLEL, 0x6c);
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dev->ts_started = 0;
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break;
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case SAA7134_MPEG_TS_SERIAL:
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saa_writeb(SAA7134_TS_SERIAL0, 0x40);
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dev->ts_started = 0;
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break;
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}
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return 0;
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}
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/* Function for start TS */
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int saa7134_ts_start(struct saa7134_dev *dev)
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{
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dprintk("TS start\n");
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BUG_ON(dev->ts_started);
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/* dma: setup channel 5 (= TS) */
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saa_writeb(SAA7134_TS_DMA0, (dev->ts.nr_packets - 1) & 0xff);
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saa_writeb(SAA7134_TS_DMA1,
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((dev->ts.nr_packets - 1) >> 8) & 0xff);
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/* TSNOPIT=0, TSCOLAP=0 */
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saa_writeb(SAA7134_TS_DMA2,
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(((dev->ts.nr_packets - 1) >> 16) & 0x3f) | 0x00);
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saa_writel(SAA7134_RS_PITCH(5), TS_PACKET_SIZE);
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saa_writel(SAA7134_RS_CONTROL(5), SAA7134_RS_CONTROL_BURST_16 |
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SAA7134_RS_CONTROL_ME |
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(dev->ts.pt_ts.dma >> 12));
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/* reset hardware TS buffers */
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saa_writeb(SAA7134_TS_SERIAL1, 0x00);
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saa_writeb(SAA7134_TS_SERIAL1, 0x03);
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saa_writeb(SAA7134_TS_SERIAL1, 0x00);
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saa_writeb(SAA7134_TS_SERIAL1, 0x01);
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/* TS clock non-inverted */
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saa_writeb(SAA7134_TS_SERIAL1, 0x00);
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/* Start TS stream */
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switch (saa7134_boards[dev->board].ts_type) {
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case SAA7134_MPEG_TS_PARALLEL:
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saa_writeb(SAA7134_TS_SERIAL0, 0x40);
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saa_writeb(SAA7134_TS_PARALLEL, 0xec |
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(saa7134_boards[dev->board].ts_force_val << 4));
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break;
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case SAA7134_MPEG_TS_SERIAL:
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saa_writeb(SAA7134_TS_SERIAL0, 0xd8);
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saa_writeb(SAA7134_TS_PARALLEL, 0x6c |
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(saa7134_boards[dev->board].ts_force_val << 4));
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saa_writeb(SAA7134_TS_PARALLEL_SERIAL, 0xbc);
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saa_writeb(SAA7134_TS_SERIAL1, 0x02);
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break;
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}
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dev->ts_started = 1;
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return 0;
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}
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int saa7134_ts_fini(struct saa7134_dev *dev)
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{
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saa7134_pgtable_free(dev->pci,&dev->ts.pt_ts);
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return 0;
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}
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void saa7134_irq_ts_done(struct saa7134_dev *dev, unsigned long status)
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{
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enum v4l2_field field;
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spin_lock(&dev->slock);
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if (dev->ts_q.curr) {
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field = dev->ts_q.curr->vb.field;
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if (field == V4L2_FIELD_TOP) {
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if ((status & 0x100000) != 0x000000)
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goto done;
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} else {
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if ((status & 0x100000) != 0x100000)
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goto done;
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}
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saa7134_buffer_finish(dev,&dev->ts_q,VIDEOBUF_DONE);
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}
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saa7134_buffer_next(dev,&dev->ts_q);
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done:
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spin_unlock(&dev->slock);
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}
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/* ----------------------------------------------------------- */
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/*
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* Local variables:
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* c-basic-offset: 8
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* End:
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*/
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