Initial import

1 files changed, 337 insertions, 0 deletions

diff --git a/drivers/media/pci/saa7134/saa7134-ts.c b/drivers/media/pci/saa7134/saa7134-ts.c
new file mode 100644
index 000000000..2709b83d5
--- /dev/null
+++ b/drivers/media/pci/saa7134/saa7134-ts.c
@@ -0,0 +1,337 @@
+/*
+ *
+ * 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/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->top_seen = 0;
+
+	if (!dev->ts_started)
+		dev->ts_field = V4L2_FIELD_TOP;
+
+	if (NULL == next)
+		next = buf;
+	if (V4L2_FIELD_TOP == dev->ts_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));
+		dev->ts_field = V4L2_FIELD_BOTTOM;
+	} 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));
+		dev->ts_field = V4L2_FIELD_TOP;
+	}
+
+	/* start DMA */
+	saa7134_set_dmabits(dev);
+
+	mod_timer(&dev->ts_q.timeout, jiffies+TS_BUFFER_TIMEOUT);
+
+	if (!dev->ts_started)
+		saa7134_ts_start(dev);
+
+	return 0;
+}
+
+int saa7134_ts_buffer_init(struct vb2_buffer *vb2)
+{
+	struct saa7134_dmaqueue *dmaq = vb2->vb2_queue->drv_priv;
+	struct saa7134_buf *buf = container_of(vb2, struct saa7134_buf, vb2);
+
+	dmaq->curr = NULL;
+	buf->activate = buffer_activate;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(saa7134_ts_buffer_init);
+
+int saa7134_ts_buffer_prepare(struct vb2_buffer *vb2)
+{
+	struct saa7134_dmaqueue *dmaq = vb2->vb2_queue->drv_priv;
+	struct saa7134_dev *dev = dmaq->dev;
+	struct saa7134_buf *buf = container_of(vb2, struct saa7134_buf, vb2);
+	struct sg_table *dma = vb2_dma_sg_plane_desc(vb2, 0);
+	unsigned int lines, llength, size;
+
+	dprintk("buffer_prepare [%p]\n", buf);
+
+	llength = TS_PACKET_SIZE;
+	lines = dev->ts.nr_packets;
+
+	size = lines * llength;
+	if (vb2_plane_size(vb2, 0) < size)
+		return -EINVAL;
+
+	vb2_set_plane_payload(vb2, 0, size);
+	vb2->v4l2_buf.field = dev->field;
+
+	return saa7134_pgtable_build(dev->pci, &dmaq->pt, dma->sgl, dma->nents,
+				    saa7134_buffer_startpage(buf));
+}
+EXPORT_SYMBOL_GPL(saa7134_ts_buffer_prepare);
+
+int saa7134_ts_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+			   unsigned int *nbuffers, unsigned int *nplanes,
+			   unsigned int sizes[], void *alloc_ctxs[])
+{
+	struct saa7134_dmaqueue *dmaq = q->drv_priv;
+	struct saa7134_dev *dev = dmaq->dev;
+	int size = TS_PACKET_SIZE * dev->ts.nr_packets;
+
+	if (0 == *nbuffers)
+		*nbuffers = dev->ts.nr_bufs;
+	*nbuffers = saa7134_buffer_count(size, *nbuffers);
+	if (*nbuffers < 3)
+		*nbuffers = 3;
+	*nplanes = 1;
+	sizes[0] = size;
+	alloc_ctxs[0] = dev->alloc_ctx;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(saa7134_ts_queue_setup);
+
+int saa7134_ts_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+	struct saa7134_dmaqueue *dmaq = vq->drv_priv;
+	struct saa7134_dev *dev = dmaq->dev;
+
+	/*
+	 * Planar video capture and TS share the same DMA channel,
+	 * so only one can be active at a time.
+	 */
+	if (vb2_is_busy(&dev->video_vbq) && dev->fmt->planar) {
+		struct saa7134_buf *buf, *tmp;
+
+		list_for_each_entry_safe(buf, tmp, &dmaq->queue, entry) {
+			list_del(&buf->entry);
+			vb2_buffer_done(&buf->vb2, VB2_BUF_STATE_QUEUED);
+		}
+		if (dmaq->curr) {
+			vb2_buffer_done(&dmaq->curr->vb2, VB2_BUF_STATE_QUEUED);
+			dmaq->curr = NULL;
+		}
+		return -EBUSY;
+	}
+	dmaq->seq_nr = 0;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(saa7134_ts_start_streaming);
+
+void saa7134_ts_stop_streaming(struct vb2_queue *vq)
+{
+	struct saa7134_dmaqueue *dmaq = vq->drv_priv;
+	struct saa7134_dev *dev = dmaq->dev;
+
+	saa7134_ts_stop(dev);
+	saa7134_stop_streaming(dev, dmaq);
+}
+EXPORT_SYMBOL_GPL(saa7134_ts_stop_streaming);
+
+struct vb2_ops saa7134_ts_qops = {
+	.queue_setup	= saa7134_ts_queue_setup,
+	.buf_init	= saa7134_ts_buffer_init,
+	.buf_prepare	= saa7134_ts_buffer_prepare,
+	.buf_queue	= saa7134_vb2_buffer_queue,
+	.wait_prepare	= vb2_ops_wait_prepare,
+	.wait_finish	= vb2_ops_wait_finish,
+	.stop_streaming = saa7134_ts_stop_streaming,
+};
+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 for read/write IO, 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;
+	dev->ts_started            = 0;
+	saa7134_pgtable_alloc(dev->pci, &dev->ts_q.pt);
+
+	/* init TS hw */
+	saa7134_ts_init_hw(dev);
+
+	return 0;
+}
+
+/* Function for stop TS */
+int saa7134_ts_stop(struct saa7134_dev *dev)
+{
+	dprintk("TS stop\n");
+
+	if (!dev->ts_started)
+		return 0;
+
+	/* Stop TS stream */
+	switch (saa7134_boards[dev->board].ts_type) {
+	case SAA7134_MPEG_TS_PARALLEL:
+		saa_writeb(SAA7134_TS_PARALLEL, 0x6c);
+		dev->ts_started = 0;
+		break;
+	case SAA7134_MPEG_TS_SERIAL:
+		saa_writeb(SAA7134_TS_SERIAL0, 0x40);
+		dev->ts_started = 0;
+		break;
+	}
+	return 0;
+}
+
+/* Function for start TS */
+int saa7134_ts_start(struct saa7134_dev *dev)
+{
+	dprintk("TS start\n");
+
+	if (WARN_ON(dev->ts_started))
+		return 0;
+
+	/* dma: setup channel 5 (= TS) */
+	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);
+	saa_writel(SAA7134_RS_PITCH(5), TS_PACKET_SIZE);
+	saa_writel(SAA7134_RS_CONTROL(5), SAA7134_RS_CONTROL_BURST_16 |
+					  SAA7134_RS_CONTROL_ME |
+					  (dev->ts_q.pt.dma >> 12));
+
+	/* reset hardware TS buffers */
+	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 */
+	switch (saa7134_boards[dev->board].ts_type) {
+	case SAA7134_MPEG_TS_PARALLEL:
+		saa_writeb(SAA7134_TS_SERIAL0, 0x40);
+		saa_writeb(SAA7134_TS_PARALLEL, 0xec |
+			(saa7134_boards[dev->board].ts_force_val << 4));
+		break;
+	case SAA7134_MPEG_TS_SERIAL:
+		saa_writeb(SAA7134_TS_SERIAL0, 0xd8);
+		saa_writeb(SAA7134_TS_PARALLEL, 0x6c |
+			(saa7134_boards[dev->board].ts_force_val << 4));
+		saa_writeb(SAA7134_TS_PARALLEL_SERIAL, 0xbc);
+		saa_writeb(SAA7134_TS_SERIAL1, 0x02);
+		break;
+	}
+
+	dev->ts_started = 1;
+
+	return 0;
+}
+
+int saa7134_ts_fini(struct saa7134_dev *dev)
+{
+	saa7134_pgtable_free(dev->pci, &dev->ts_q.pt);
+	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_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, VB2_BUF_STATE_DONE);
+	}
+	saa7134_buffer_next(dev,&dev->ts_q);
+
+ done:
+	spin_unlock(&dev->slock);
+}