Merge branch for-rmk-devel of git://aeryn.fluff.org.uk/bjdooks/linux into devel

1 files changed, 56 insertions, 95 deletions

diff --git a/arch/arm/plat-s3c24xx/dma.c b/arch/arm/plat-s3c24xx/dma.c
index 07326f63236..196b1912365 100644
--- a/arch/arm/plat-s3c24xx/dma.c
+++ b/arch/arm/plat-s3c24xx/dma.c
@@ -31,10 +31,10 @@
 #include <asm/irq.h>
 #include <mach/hardware.h>
 #include <mach/dma.h>
-
 #include <mach/map.h>
 
-#include <plat/dma.h>
+#include <plat/dma-plat.h>
+#include <plat/regs-dma.h>
 
 /* io map for dma */
 static void __iomem *dma_base;
@@ -44,8 +44,6 @@ static int dma_channels;
 
 static struct s3c24xx_dma_selection dma_sel;
 
-/* dma channel state information */
-struct s3c2410_dma_chan s3c2410_chans[S3C2410_DMA_CHANNELS];
 
 /* debugging functions */
 
@@ -135,21 +133,6 @@ dmadbg_showregs(const char *fname, int line, struct s3c2410_dma_chan *chan)
 #define dbg_showchan(chan) do { } while(0)
 #endif /* CONFIG_S3C2410_DMA_DEBUG */
 
-static struct s3c2410_dma_chan *dma_chan_map[DMACH_MAX];
-
-/* lookup_dma_channel
- *
- * change the dma channel number given into a real dma channel id
-*/
-
-static struct s3c2410_dma_chan *lookup_dma_channel(unsigned int channel)
-{
-	if (channel & DMACH_LOW_LEVEL)
-		return &s3c2410_chans[channel & ~DMACH_LOW_LEVEL];
-	else
-		return dma_chan_map[channel];
-}
-
 /* s3c2410_dma_stats_timeout
  *
  * Update DMA stats from timeout info
@@ -214,8 +197,6 @@ s3c2410_dma_waitforload(struct s3c2410_dma_chan *chan, int line)
 	return 0;
 }
 
-
-
 /* s3c2410_dma_loadbuffer
  *
  * load a buffer, and update the channel state
@@ -453,7 +434,7 @@ s3c2410_dma_canload(struct s3c2410_dma_chan *chan)
 int s3c2410_dma_enqueue(unsigned int channel, void *id,
 			dma_addr_t data, int size)
 {
-	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
 	struct s3c2410_dma_buf *buf;
 	unsigned long flags;
 
@@ -804,7 +785,7 @@ EXPORT_SYMBOL(s3c2410_dma_request);
 
 int s3c2410_dma_free(unsigned int channel, struct s3c2410_dma_client *client)
 {
-	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
 	unsigned long flags;
 
 	if (chan == NULL)
@@ -836,7 +817,7 @@ int s3c2410_dma_free(unsigned int channel, struct s3c2410_dma_client *client)
 	chan->irq_claimed = 0;
 
 	if (!(channel & DMACH_LOW_LEVEL))
-		dma_chan_map[channel] = NULL;
+		s3c_dma_chan_map[channel] = NULL;
 
 	local_irq_restore(flags);
 
@@ -995,7 +976,7 @@ static int s3c2410_dma_started(struct s3c2410_dma_chan *chan)
 int
 s3c2410_dma_ctrl(unsigned int channel, enum s3c2410_chan_op op)
 {
-	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
 
 	if (chan == NULL)
 		return -EINVAL;
@@ -1038,14 +1019,13 @@ 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);
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
+	unsigned int dcon;
 
 	pr_debug("%s: chan=%d, xfer_unit=%d, dcon=%08x\n",
 		 __func__, channel, xferunit, dcon);
@@ -1055,10 +1035,33 @@ 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;
@@ -1090,58 +1093,6 @@ int s3c2410_dma_config(unsigned int channel,
 
 EXPORT_SYMBOL(s3c2410_dma_config);
 
-int s3c2410_dma_setflags(unsigned int channel, unsigned int flags)
-{
-	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
-
-	if (chan == NULL)
-		return -EINVAL;
-
-	pr_debug("%s: chan=%p, flags=%08x\n", __func__, chan, flags);
-
-	chan->flags = flags;
-
-	return 0;
-}
-
-EXPORT_SYMBOL(s3c2410_dma_setflags);
-
-
-/* do we need to protect the settings of the fields from
- * irq?
-*/
-
-int s3c2410_dma_set_opfn(unsigned int channel, s3c2410_dma_opfn_t rtn)
-{
-	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
-
-	if (chan == NULL)
-		return -EINVAL;
-
-	pr_debug("%s: chan=%p, op rtn=%p\n", __func__, chan, rtn);
-
-	chan->op_fn = rtn;
-
-	return 0;
-}
-
-EXPORT_SYMBOL(s3c2410_dma_set_opfn);
-
-int s3c2410_dma_set_buffdone_fn(unsigned int channel, s3c2410_dma_cbfn_t rtn)
-{
-	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
-
-	if (chan == NULL)
-		return -EINVAL;
-
-	pr_debug("%s: chan=%p, callback rtn=%p\n", __func__, chan, rtn);
-
-	chan->callback_fn = rtn;
-
-	return 0;
-}
-
-EXPORT_SYMBOL(s3c2410_dma_set_buffdone_fn);
 
 /* s3c2410_dma_devconfig
  *
@@ -1150,29 +1101,38 @@ 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);
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_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:
@@ -1219,7 +1179,7 @@ EXPORT_SYMBOL(s3c2410_dma_devconfig);
 
 int s3c2410_dma_getposition(unsigned int channel, dma_addr_t *src, dma_addr_t *dst)
 {
- 	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
 
 	if (chan == NULL)
 		return -EINVAL;
@@ -1278,8 +1238,8 @@ 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 */
 
@@ -1476,7 +1436,8 @@ static struct s3c2410_dma_chan *s3c2410_dma_map_channel(int channel)
  found:
 	dmach = &s3c2410_chans[ch];
 	dmach->map = ch_map;
-	dma_chan_map[channel] = dmach;
+	dmach->req_ch = channel;
+	s3c_dma_chan_map[channel] = dmach;
 
 	/* select the channel */