diff options
Diffstat (limited to 'drivers/media/video/saa7134/saa7134-ts.c')
| -rw-r--r-- | drivers/media/video/saa7134/saa7134-ts.c | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/drivers/media/video/saa7134/saa7134-ts.c b/drivers/media/video/saa7134/saa7134-ts.c new file mode 100644 index 00000000000..345eb2a8c28 --- /dev/null +++ b/drivers/media/video/saa7134/saa7134-ts.c @@ -0,0 +1,243 @@ +/* + * $Id: saa7134-ts.c,v 1.14 2005/02/03 10:24:33 kraxel Exp $ + * + * 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/moduleparam.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) +{ + u32 control; + + dprintk("buffer_activate [%p]",buf); + buf->vb.state = STATE_ACTIVE; + buf->top_seen = 0; + + /* dma: setup channel 5 (= TS) */ + control = SAA7134_RS_CONTROL_BURST_16 | + SAA7134_RS_CONTROL_ME | + (buf->pt->dma >> 12); + + 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)); + } + saa_writel(SAA7134_RS_PITCH(5),TS_PACKET_SIZE); + saa_writel(SAA7134_RS_CONTROL(5),control); + + /* 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; + 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(dev,buf); + } + + if (STATE_NEEDS_INIT == buf->vb.state) { + buf->vb.width = llength; + buf->vb.height = lines; + buf->vb.size = size; + buf->pt = &dev->ts.pt_ts; + + err = videobuf_iolock(dev->pci,&buf->vb,NULL); + if (err) + goto oops; + err = saa7134_pgtable_build(dev->pci,buf->pt, + buf->vb.dma.sglist, + buf->vb.dma.sglen, + saa7134_buffer_startpage(buf)); + if (err) + goto oops; + } + buf->vb.state = STATE_PREPARED; + buf->activate = buffer_activate; + buf->vb.field = field; + return 0; + + oops: + saa7134_dma_free(dev,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_dev *dev = q->priv_data; + struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb); + + saa7134_dma_free(dev,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 = 4; +module_param(tsbufs, int, 0444); +MODULE_PARM_DESC(tsbufs,"number of ts buffers, range 2-32"); + +static unsigned int ts_nr_packets = 30; +module_param(ts_nr_packets, int, 0444); +MODULE_PARM_DESC(ts_nr_packets,"size of a ts buffers (in ts packets)"); + +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 */ + saa_writeb(SAA7134_TS_SERIAL1, 0x00); /* deactivate TS softreset */ + saa_writeb(SAA7134_TS_PARALLEL, 0xec); /* TSSOP high active, TSVAL high active, TSLOCK ignored */ + 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)); + saa_writeb(SAA7134_TS_DMA2, ((((dev->ts.nr_packets-1)>>16)&0x3f) | 0x00)); /* TSNOPIT=0, TSCOLAP=0 */ + + 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,STATE_DONE); + } + saa7134_buffer_next(dev,&dev->ts_q); + + done: + spin_unlock(&dev->slock); +} + +/* ----------------------------------------------------------- */ +/* + * Local variables: + * c-basic-offset: 8 + * End: + */ |