[ARM] S3C24XX: Remove hardware specific registers from DMA

calls

The S3C24XX DMA API channel configuration registers are being passed
values comprised of register values which makes it hard to move the
API to cover both the S3C24XX and S3C64XX.

These values can be calculated from knowing which device the channel
is connected to, so remove them from the two calls s3c2410_dma_config
and s3c2410_dma_devconfig.

Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 46 insertions, 14 deletions

diff --git a/arch/arm/plat-s3c24xx/dma.c b/arch/arm/plat-s3c24xx/dma.c
index d3d1375d95b3..dc58a0ddc9f6 100644
--- a/arch/arm/plat-s3c24xx/dma.c
+++ b/arch/arm/plat-s3c24xx/dma.c
@@ -1038,14 +1038,13 @@ EXPORT_SYMBOL(s3c2410_dma_ctrl);
 /* s3c2410_dma_config
  *
  * xfersize:     size of unit in bytes (1,2,4)
- * dcon:         base value of the DCONx register
 */
 
 int s3c2410_dma_config(unsigned int channel,
-		       int xferunit,
-		       int dcon)
+		       int xferunit)
 {
 	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
+	unsigned int dcon;
 
 	pr_debug("%s: chan=%d, xfer_unit=%d, dcon=%08x\n",
 		 __func__, channel, xferunit, dcon);
@@ -1055,10 +1054,33 @@ int s3c2410_dma_config(unsigned int channel,
 
 	pr_debug("%s: Initial dcon is %08x\n", __func__, dcon);
 
-	dcon |= chan->dcon & dma_sel.dcon_mask;
+	dcon = chan->dcon & dma_sel.dcon_mask;
 
 	pr_debug("%s: New dcon is %08x\n", __func__, dcon);
 
+	switch (chan->req_ch) {
+	case DMACH_I2S_IN:
+	case DMACH_I2S_OUT:
+	case DMACH_PCM_IN:
+	case DMACH_PCM_OUT:
+	case DMACH_MIC_IN:
+	default:
+		dcon |= S3C2410_DCON_HANDSHAKE;
+		dcon |= S3C2410_DCON_SYNC_PCLK;
+		break;
+
+	case DMACH_SDI:
+		/* note, ensure if need HANDSHAKE or not */
+		dcon |= S3C2410_DCON_SYNC_PCLK;
+		break;
+
+	case DMACH_XD0:
+	case DMACH_XD1:
+		dcon |= S3C2410_DCON_HANDSHAKE;
+		dcon |= S3C2410_DCON_SYNC_HCLK;
+		break;
+	}
+
 	switch (xferunit) {
 	case 1:
 		dcon |= S3C2410_DCON_BYTE;
@@ -1150,29 +1172,38 @@ EXPORT_SYMBOL(s3c2410_dma_set_buffdone_fn);
  * source:    S3C2410_DMASRC_HW: source is hardware
  *            S3C2410_DMASRC_MEM: source is memory
  *
- * hwcfg:     the value for xxxSTCn register,
- *            bit 0: 0=increment pointer, 1=leave pointer
- *            bit 1: 0=source is AHB, 1=source is APB
- *
  * devaddr:   physical address of the source
 */
 
 int s3c2410_dma_devconfig(int channel,
 			  enum s3c2410_dmasrc source,
-			  int hwcfg,
 			  unsigned long devaddr)
 {
 	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
+	unsigned int hwcfg;
 
 	if (chan == NULL)
 		return -EINVAL;
 
-	pr_debug("%s: source=%d, hwcfg=%08x, devaddr=%08lx\n",
-		 __func__, (int)source, hwcfg, devaddr);
+	pr_debug("%s: source=%d, devaddr=%08lx\n",
+		 __func__, (int)source, devaddr);
 
 	chan->source = source;
 	chan->dev_addr = devaddr;
-	chan->hw_cfg = hwcfg;
+
+	switch (chan->req_ch) {
+	case DMACH_XD0:
+	case DMACH_XD1:
+		hwcfg = 0; /* AHB */
+		break;
+
+	default:
+		hwcfg = S3C2410_DISRCC_APB;
+	}
+
+	/* always assume our peripheral desintation is a fixed
+	 * address in memory. */
+	 hwcfg |= S3C2410_DISRCC_INC;
 
 	switch (source) {
 	case S3C2410_DMASRC_HW:
@@ -1278,8 +1309,8 @@ static int s3c2410_dma_resume(struct sys_device *dev)
 
 	printk(KERN_INFO "dma%d: restoring configuration\n", cp->number);
 
-	s3c2410_dma_config(no, cp->xfer_unit, cp->dcon);
-	s3c2410_dma_devconfig(no, cp->source, cp->hw_cfg, cp->dev_addr);
+	s3c2410_dma_config(no, cp->xfer_unit);
+	s3c2410_dma_devconfig(no, cp->source, cp->dev_addr);
 
 	/* re-select the dma source for this channel */
 
@@ -1476,6 +1507,7 @@ static struct s3c2410_dma_chan *s3c2410_dma_map_channel(int channel)
  found:
 	dmach = &s3c2410_chans[ch];
 	dmach->map = ch_map;
+	dmach->req_ch = channel;
 	dma_chan_map[channel] = dmach;
 
 	/* select the channel */