249 lines
6.6 KiB
C
249 lines
6.6 KiB
C
/*
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* Driver for the Conexant CX23885 PCIe bridge
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*
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* Copyright (c) 2007 Steven Toth <stoth@linuxtv.org>
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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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*
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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/kernel.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include "cx23885.h"
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static unsigned int vbibufs = 4;
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module_param(vbibufs, int, 0644);
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MODULE_PARM_DESC(vbibufs, "number of vbi buffers, range 2-32");
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static unsigned int vbi_debug;
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module_param(vbi_debug, int, 0644);
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MODULE_PARM_DESC(vbi_debug, "enable debug messages [vbi]");
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#define dprintk(level, fmt, arg...)\
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do { if (vbi_debug >= level)\
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printk(KERN_DEBUG "%s/0: " fmt, dev->name, ## arg);\
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} while (0)
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/* ------------------------------------------------------------------ */
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int cx23885_vbi_fmt(struct file *file, void *priv,
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struct v4l2_format *f)
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{
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struct cx23885_fh *fh = priv;
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struct cx23885_dev *dev = fh->dev;
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if (dev->tvnorm & V4L2_STD_525_60) {
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/* ntsc */
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f->fmt.vbi.sampling_rate = 28636363;
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f->fmt.vbi.start[0] = 10;
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f->fmt.vbi.start[1] = 273;
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} else if (dev->tvnorm & V4L2_STD_625_50) {
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/* pal */
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f->fmt.vbi.sampling_rate = 35468950;
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f->fmt.vbi.start[0] = 7 - 1;
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f->fmt.vbi.start[1] = 319 - 1;
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}
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return 0;
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}
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static int cx23885_start_vbi_dma(struct cx23885_dev *dev,
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struct cx23885_dmaqueue *q,
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struct cx23885_buffer *buf)
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{
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/* setup fifo + format */
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cx23885_sram_channel_setup(dev, &dev->sram_channels[SRAM_CH02],
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buf->vb.width, buf->risc.dma);
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/* reset counter */
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q->count = 1;
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/* enable irqs */
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cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | 0x01);
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cx_set(VID_A_INT_MSK, 0x000022);
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/* start dma */
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cx_set(DEV_CNTRL2, (1<<5));
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cx_set(VID_A_DMA_CTL, 0x00000022);
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return 0;
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}
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static int cx23885_restart_vbi_queue(struct cx23885_dev *dev,
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struct cx23885_dmaqueue *q)
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{
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struct cx23885_buffer *buf;
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struct list_head *item;
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if (list_empty(&q->active))
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return 0;
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buf = list_entry(q->active.next, struct cx23885_buffer, vb.queue);
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dprintk(2, "restart_queue [%p/%d]: restart dma\n",
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buf, buf->vb.i);
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cx23885_start_vbi_dma(dev, q, buf);
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list_for_each(item, &q->active) {
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buf = list_entry(item, struct cx23885_buffer, vb.queue);
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buf->count = q->count++;
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}
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mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
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return 0;
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}
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void cx23885_vbi_timeout(unsigned long data)
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{
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struct cx23885_dev *dev = (struct cx23885_dev *)data;
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struct cx23885_dmaqueue *q = &dev->vbiq;
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struct cx23885_buffer *buf;
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unsigned long flags;
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cx23885_sram_channel_dump(dev, &dev->sram_channels[SRAM_CH02]);
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cx_clear(VID_A_DMA_CTL, 0x22);
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spin_lock_irqsave(&dev->slock, flags);
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while (!list_empty(&q->active)) {
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buf = list_entry(q->active.next, struct cx23885_buffer,
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vb.queue);
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list_del(&buf->vb.queue);
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buf->vb.state = VIDEOBUF_ERROR;
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wake_up(&buf->vb.done);
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printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->name,
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buf, buf->vb.i, (unsigned long)buf->risc.dma);
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}
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cx23885_restart_vbi_queue(dev, q);
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spin_unlock_irqrestore(&dev->slock, flags);
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}
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/* ------------------------------------------------------------------ */
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#define VBI_LINE_LENGTH 2048
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#define VBI_LINE_COUNT 17
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static int
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vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
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{
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*size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
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if (0 == *count)
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*count = vbibufs;
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if (*count < 2)
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*count = 2;
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if (*count > 32)
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*count = 32;
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return 0;
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}
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static int
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vbi_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 cx23885_fh *fh = q->priv_data;
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struct cx23885_dev *dev = fh->dev;
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struct cx23885_buffer *buf = container_of(vb,
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struct cx23885_buffer, vb);
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struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
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unsigned int size;
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int rc;
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size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
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if (0 != buf->vb.baddr && buf->vb.bsize < size)
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return -EINVAL;
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if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
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buf->vb.width = VBI_LINE_LENGTH;
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buf->vb.height = VBI_LINE_COUNT;
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buf->vb.size = size;
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buf->vb.field = V4L2_FIELD_SEQ_TB;
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rc = videobuf_iolock(q, &buf->vb, NULL);
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if (0 != rc)
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goto fail;
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cx23885_risc_buffer(dev->pci, &buf->risc,
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dma->sglist,
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0, buf->vb.width * buf->vb.height,
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buf->vb.width, 0,
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buf->vb.height);
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}
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buf->vb.state = VIDEOBUF_PREPARED;
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return 0;
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fail:
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cx23885_free_buffer(q, buf);
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return rc;
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}
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static void
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vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
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{
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struct cx23885_buffer *buf =
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container_of(vb, struct cx23885_buffer, vb);
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struct cx23885_buffer *prev;
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struct cx23885_fh *fh = vq->priv_data;
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struct cx23885_dev *dev = fh->dev;
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struct cx23885_dmaqueue *q = &dev->vbiq;
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/* add jump to stopper */
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buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
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buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
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buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */
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if (list_empty(&q->active)) {
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list_add_tail(&buf->vb.queue, &q->active);
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cx23885_start_vbi_dma(dev, q, buf);
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buf->vb.state = VIDEOBUF_ACTIVE;
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buf->count = q->count++;
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mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
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dprintk(2, "[%p/%d] vbi_queue - first active\n",
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buf, buf->vb.i);
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} else {
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prev = list_entry(q->active.prev, struct cx23885_buffer,
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vb.queue);
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list_add_tail(&buf->vb.queue, &q->active);
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buf->vb.state = VIDEOBUF_ACTIVE;
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buf->count = q->count++;
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prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
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prev->risc.jmp[2] = cpu_to_le32(0); /* Bits 63-32 */
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dprintk(2, "[%p/%d] buffer_queue - append to active\n",
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buf, buf->vb.i);
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}
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}
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static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
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{
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struct cx23885_buffer *buf =
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container_of(vb, struct cx23885_buffer, vb);
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cx23885_free_buffer(q, buf);
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}
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struct videobuf_queue_ops cx23885_vbi_qops = {
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.buf_setup = vbi_setup,
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.buf_prepare = vbi_prepare,
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.buf_queue = vbi_queue,
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.buf_release = vbi_release,
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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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