Initial import

1 files changed, 221 insertions, 0 deletions

diff --git a/drivers/media/pci/saa7134/saa7134-vbi.c b/drivers/media/pci/saa7134/saa7134-vbi.c
new file mode 100644
index 000000000..5306e549e
--- /dev/null
+++ b/drivers/media/pci/saa7134/saa7134-vbi.c
@@ -0,0 +1,221 @@
+/*
+ *
+ * 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 "saa7134-reg.h"
+#include "saa7134.h"
+
+/* ------------------------------------------------------------------ */
+
+static unsigned int vbi_debug;
+module_param(vbi_debug, int, 0644);
+MODULE_PARM_DESC(vbi_debug,"enable debug messages [vbi]");
+
+static unsigned int vbibufs = 4;
+module_param(vbibufs, int, 0444);
+MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32");
+
+#define dprintk(fmt, arg...)	if (vbi_debug) \
+	printk(KERN_DEBUG "%s/vbi: " fmt, dev->name , ## arg)
+
+/* ------------------------------------------------------------------ */
+
+#define VBI_LINE_COUNT     17
+#define VBI_LINE_LENGTH  2048
+#define VBI_SCALE       0x200
+
+static void task_init(struct saa7134_dev *dev, struct saa7134_buf *buf,
+		      int task)
+{
+	struct saa7134_tvnorm *norm = dev->tvnorm;
+
+	/* setup video scaler */
+	saa_writeb(SAA7134_VBI_H_START1(task), norm->h_start     &  0xff);
+	saa_writeb(SAA7134_VBI_H_START2(task), norm->h_start     >> 8);
+	saa_writeb(SAA7134_VBI_H_STOP1(task),  norm->h_stop      &  0xff);
+	saa_writeb(SAA7134_VBI_H_STOP2(task),  norm->h_stop      >> 8);
+	saa_writeb(SAA7134_VBI_V_START1(task), norm->vbi_v_start_0 &  0xff);
+	saa_writeb(SAA7134_VBI_V_START2(task), norm->vbi_v_start_0 >> 8);
+	saa_writeb(SAA7134_VBI_V_STOP1(task),  norm->vbi_v_stop_0  &  0xff);
+	saa_writeb(SAA7134_VBI_V_STOP2(task),  norm->vbi_v_stop_0  >> 8);
+
+	saa_writeb(SAA7134_VBI_H_SCALE_INC1(task),        VBI_SCALE & 0xff);
+	saa_writeb(SAA7134_VBI_H_SCALE_INC2(task),        VBI_SCALE >> 8);
+	saa_writeb(SAA7134_VBI_PHASE_OFFSET_LUMA(task),   0x00);
+	saa_writeb(SAA7134_VBI_PHASE_OFFSET_CHROMA(task), 0x00);
+
+	saa_writeb(SAA7134_VBI_H_LEN1(task), dev->vbi_hlen & 0xff);
+	saa_writeb(SAA7134_VBI_H_LEN2(task), dev->vbi_hlen >> 8);
+	saa_writeb(SAA7134_VBI_V_LEN1(task), dev->vbi_vlen & 0xff);
+	saa_writeb(SAA7134_VBI_V_LEN2(task), dev->vbi_vlen >> 8);
+
+	saa_andorb(SAA7134_DATA_PATH(task), 0xc0, 0x00);
+}
+
+/* ------------------------------------------------------------------ */
+
+static int buffer_activate(struct saa7134_dev *dev,
+			   struct saa7134_buf *buf,
+			   struct saa7134_buf *next)
+{
+	struct saa7134_dmaqueue *dmaq = buf->vb2.vb2_queue->drv_priv;
+	unsigned long control, base;
+
+	dprintk("buffer_activate [%p]\n", buf);
+	buf->top_seen = 0;
+
+	task_init(dev, buf, TASK_A);
+	task_init(dev, buf, TASK_B);
+	saa_writeb(SAA7134_OFMT_DATA_A, 0x06);
+	saa_writeb(SAA7134_OFMT_DATA_B, 0x06);
+
+	/* DMA: setup channel 2+3 (= VBI Task A+B) */
+	base    = saa7134_buffer_base(buf);
+	control = SAA7134_RS_CONTROL_BURST_16 |
+		SAA7134_RS_CONTROL_ME |
+		(dmaq->pt.dma >> 12);
+	saa_writel(SAA7134_RS_BA1(2), base);
+	saa_writel(SAA7134_RS_BA2(2), base + dev->vbi_hlen * dev->vbi_vlen);
+	saa_writel(SAA7134_RS_PITCH(2), dev->vbi_hlen);
+	saa_writel(SAA7134_RS_CONTROL(2), control);
+	saa_writel(SAA7134_RS_BA1(3), base);
+	saa_writel(SAA7134_RS_BA2(3), base + dev->vbi_hlen * dev->vbi_vlen);
+	saa_writel(SAA7134_RS_PITCH(3), dev->vbi_hlen);
+	saa_writel(SAA7134_RS_CONTROL(3), control);
+
+	/* start DMA */
+	saa7134_set_dmabits(dev);
+	mod_timer(&dmaq->timeout, jiffies + BUFFER_TIMEOUT);
+
+	return 0;
+}
+
+static int 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(&buf->vb2, 0);
+	unsigned int size;
+
+	if (dma->sgl->offset) {
+		pr_err("The buffer is not page-aligned\n");
+		return -EINVAL;
+	}
+	size = dev->vbi_hlen * dev->vbi_vlen * 2;
+	if (vb2_plane_size(vb2, 0) < size)
+		return -EINVAL;
+
+	vb2_set_plane_payload(vb2, 0, size);
+
+	return saa7134_pgtable_build(dev->pci, &dmaq->pt, dma->sgl, dma->nents,
+				    saa7134_buffer_startpage(buf));
+}
+
+static int 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;
+	unsigned int size;
+
+	dev->vbi_vlen = dev->tvnorm->vbi_v_stop_0 - dev->tvnorm->vbi_v_start_0 + 1;
+	if (dev->vbi_vlen > VBI_LINE_COUNT)
+		dev->vbi_vlen = VBI_LINE_COUNT;
+	dev->vbi_hlen = VBI_LINE_LENGTH;
+	size = dev->vbi_hlen * dev->vbi_vlen * 2;
+
+	*nbuffers = saa7134_buffer_count(size, *nbuffers);
+	*nplanes = 1;
+	sizes[0] = size;
+	alloc_ctxs[0] = dev->alloc_ctx;
+	return 0;
+}
+
+static int 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;
+}
+
+struct vb2_ops saa7134_vbi_qops = {
+	.queue_setup	= queue_setup,
+	.buf_init	= buffer_init,
+	.buf_prepare	= buffer_prepare,
+	.buf_queue	= saa7134_vb2_buffer_queue,
+	.wait_prepare	= vb2_ops_wait_prepare,
+	.wait_finish	= vb2_ops_wait_finish,
+	.start_streaming = saa7134_vb2_start_streaming,
+	.stop_streaming = saa7134_vb2_stop_streaming,
+};
+
+/* ------------------------------------------------------------------ */
+
+int saa7134_vbi_init1(struct saa7134_dev *dev)
+{
+	INIT_LIST_HEAD(&dev->vbi_q.queue);
+	init_timer(&dev->vbi_q.timeout);
+	dev->vbi_q.timeout.function = saa7134_buffer_timeout;
+	dev->vbi_q.timeout.data     = (unsigned long)(&dev->vbi_q);
+	dev->vbi_q.dev              = dev;
+
+	if (vbibufs < 2)
+		vbibufs = 2;
+	if (vbibufs > VIDEO_MAX_FRAME)
+		vbibufs = VIDEO_MAX_FRAME;
+	return 0;
+}
+
+int saa7134_vbi_fini(struct saa7134_dev *dev)
+{
+	/* nothing */
+	return 0;
+}
+
+void saa7134_irq_vbi_done(struct saa7134_dev *dev, unsigned long status)
+{
+	spin_lock(&dev->slock);
+	if (dev->vbi_q.curr) {
+		/* make sure we have seen both fields */
+		if ((status & 0x10) == 0x00) {
+			dev->vbi_q.curr->top_seen = 1;
+			goto done;
+		}
+		if (!dev->vbi_q.curr->top_seen)
+			goto done;
+
+		saa7134_buffer_finish(dev, &dev->vbi_q, VB2_BUF_STATE_DONE);
+	}
+	saa7134_buffer_next(dev, &dev->vbi_q);
+
+ done:
+	spin_unlock(&dev->slock);
+}