V4L/DVB (5542): Budget-av: Remove polarity switching of the clock for DVB-C

Remove the polarity switching of the clock for the DVB-C cards in
budget-av.c. This hack is no longer necessary because the saa7146 can
do the job to remove the additional FEC bytes from the TS.

Signed-off-by: Hartmut Birr <e9hack@googlemail.com>
Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 35 insertions, 7 deletions

diff --git a/drivers/media/dvb/ttpci/budget-core.c b/drivers/media/dvb/ttpci/budget-core.c
index e15562f81664..cef9d8d8a122 100644
--- a/drivers/media/dvb/ttpci/budget-core.c
+++ b/drivers/media/dvb/ttpci/budget-core.c
@@ -41,11 +41,14 @@
 
 #define TS_WIDTH		(2 * TS_SIZE)
 #define TS_WIDTH_ACTIVY		TS_SIZE
+#define TS_WIDTH_DVBC		TS_SIZE
 #define TS_HEIGHT_MASK		0xf00
 #define TS_HEIGHT_MASK_ACTIVY	0xc00
+#define TS_HEIGHT_MASK_DVBC	0xe00
 #define TS_MIN_BUFSIZE_K	188
 #define TS_MAX_BUFSIZE_K	1410
 #define TS_MAX_BUFSIZE_K_ACTIVY	564
+#define TS_MAX_BUFSIZE_K_DVBC	1316
 #define BUFFER_WARNING_WAIT	(30*HZ)
 
 int budget_debug;
@@ -122,7 +125,13 @@ static int start_ts_capture(struct budget *budget)
 	mdelay(10);
 
 	saa7146_write(dev, BASE_ODD3, 0);
-	saa7146_write(dev, BASE_EVEN3, 0);
+	if (budget->buffer_size > budget->buffer_height * budget->buffer_width) {
+		// using odd/even buffers
+		saa7146_write(dev, BASE_EVEN3, budget->buffer_height * budget->buffer_width);
+	} else {
+		// using a single buffer
+		saa7146_write(dev, BASE_EVEN3, 0);
+	}
 	saa7146_write(dev, PROT_ADDR3, budget->buffer_size);
 	saa7146_write(dev, BASE_PAGE3, budget->pt.dma | ME1 | 0x90);
 
@@ -399,11 +408,22 @@ int ttpci_budget_init(struct budget *budget, struct saa7146_dev *dev,
 	budget->card = bi;
 	budget->dev = (struct saa7146_dev *) dev;
 
-	if (budget->card->type == BUDGET_FS_ACTIVY) {
+	switch(budget->card->type) {
+	case BUDGET_FS_ACTIVY:
 		budget->buffer_width = TS_WIDTH_ACTIVY;
 		max_bufsize = TS_MAX_BUFSIZE_K_ACTIVY;
 		height_mask = TS_HEIGHT_MASK_ACTIVY;
-	} else {
+		break;
+
+	case BUDGET_KNC1C:
+	case BUDGET_KNC1CP:
+	case BUDGET_CIN1200C:
+		budget->buffer_width = TS_WIDTH_DVBC;
+		max_bufsize = TS_MAX_BUFSIZE_K_DVBC;
+		height_mask = TS_HEIGHT_MASK_DVBC;
+		break;
+
+	default:
 		budget->buffer_width = TS_WIDTH;
 		max_bufsize = TS_MAX_BUFSIZE_K;
 		height_mask = TS_HEIGHT_MASK;
@@ -415,14 +435,22 @@ int ttpci_budget_init(struct budget *budget, struct saa7146_dev *dev,
 		dma_buffer_size = max_bufsize;
 
 	budget->buffer_height = dma_buffer_size * 1024 / budget->buffer_width;
-	budget->buffer_height &= height_mask;
-	budget->buffer_size = budget->buffer_height * budget->buffer_width;
+	if (budget->buffer_height > 0xfff) {
+		budget->buffer_height /= 2;
+		budget->buffer_height &= height_mask;
+		budget->buffer_size = 2 * budget->buffer_height * budget->buffer_width;
+	} else {
+		budget->buffer_height &= height_mask;
+		budget->buffer_size = budget->buffer_height * budget->buffer_width;
+	}
 	budget->buffer_warning_threshold = budget->buffer_size * 80/100;
 	budget->buffer_warnings = 0;
 	budget->buffer_warning_time = jiffies;
 
-	dprintk(2, "%s: width = %d, height = %d\n",
-		budget->dev->name, budget->buffer_width, budget->buffer_height);
+	dprintk(2, "%s: buffer type = %s, width = %d, height = %d\n",
+		budget->dev->name,
+		budget->buffer_size > budget->buffer_width * budget->buffer_height ? "odd/even" : "single",
+		budget->buffer_width, budget->buffer_height);
 	printk("%s: dma buffer size %u\n", budget->dev->name, budget->buffer_size);
 
 	if ((ret = dvb_register_adapter(&budget->dvb_adapter, budget->card->name, owner, &budget->dev->pci->dev)) < 0) {