/* * * 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; 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); if (dev->ts_state == SAA7134_TS_BUFF_DONE) { /* Clear TS cache */ dev->buff_cnt = 0; saa_writeb(SAA7134_TS_SERIAL1, 0x00); saa_writeb(SAA7134_TS_SERIAL1, 0x03); saa_writeb(SAA7134_TS_SERIAL1, 0x00); saa_writeb(SAA7134_TS_SERIAL1, 0x01); /* TS clock non-inverted */ saa_writeb(SAA7134_TS_SERIAL1, 0x00); /* Start TS stream */ saa_writeb(SAA7134_TS_SERIAL0, 0x40); saa_writeb(SAA7134_TS_PARALLEL, 0xEC); dev->ts_state = SAA7134_TS_STARTED; } 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; } dev->buff_cnt++; if (dev->buff_cnt == dev->ts.nr_bufs) { dev->ts_state = SAA7134_TS_BUFF_DONE; /* 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); /* TSNOPIT=0, TSCOLAP=0 */ saa_writeb(SAA7134_TS_DMA2, (((lines - 1) >> 16) & 0x3f) | 0x00); 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); dev->buff_cnt = 0; dev->ts_state = SAA7134_TS_STOPPED; 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); struct saa7134_dev *dev = q->priv_data; if (dev->ts_state == SAA7134_TS_STARTED) { /* Stop TS transport */ saa_writeb(SAA7134_TS_PARALLEL, 0x6c); dev->ts_state = SAA7134_TS_STOPPED; } 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, 0x6c); 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: */