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authorPeter Tyser <ptyser@xes-inc.com>2009-06-30 17:15:42 -0500
committerKumar Gala <galak@kernel.crashing.org>2009-07-01 23:02:24 -0500
commita730393a362741c318b21771b8d7b2647e546c3e (patch)
tree5f043d28018c46e2da16be0eb2df4ed93fe2063e /drivers/dma
parent9c06071a6077ba95e9d43226156e39567d5d064a (diff)
downloadblackbird-obmc-uboot-a730393a362741c318b21771b8d7b2647e546c3e.tar.gz
blackbird-obmc-uboot-a730393a362741c318b21771b8d7b2647e546c3e.zip
fsl_dma: Use proper I/O access functions
Signed-off-by: Peter Tyser <ptyser@xes-inc.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/fsl_dma.c32
1 files changed, 18 insertions, 14 deletions
diff --git a/drivers/dma/fsl_dma.c b/drivers/dma/fsl_dma.c
index baf29420f0..33ea8285eb 100644
--- a/drivers/dma/fsl_dma.c
+++ b/drivers/dma/fsl_dma.c
@@ -27,12 +27,13 @@
#include <config.h>
#include <common.h>
+#include <asm/io.h>
#include <asm/fsl_dma.h>
#if defined(CONFIG_MPC85xx)
-volatile ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC85xx_DMA_ADDR);
+ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC85xx_DMA_ADDR);
#elif defined(CONFIG_MPC86xx)
-volatile ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC86xx_DMA_ADDR);
+ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC86xx_DMA_ADDR);
#else
#error "Freescale DMA engine not supported on your processor"
#endif
@@ -48,14 +49,15 @@ static void dma_sync(void)
static uint dma_check(void) {
volatile fsl_dma_t *dma = &dma_base->dma[0];
- volatile uint status = dma->sr;
+ uint status;
/* While the channel is busy, spin */
- while (status & FSL_DMA_SR_CB)
- status = dma->sr;
+ do {
+ status = in_be32(&dma->sr);
+ } while (status & FSL_DMA_SR_CB);
/* clear MR[CS] channel start bit */
- dma->mr &= FSL_DMA_MR_CS;
+ out_be32(&dma->mr, in_be32(&dma->mr) & FSL_DMA_MR_CS);
dma_sync();
if (status != 0)
@@ -67,25 +69,27 @@ static uint dma_check(void) {
void dma_init(void) {
volatile fsl_dma_t *dma = &dma_base->dma[0];
- dma->satr = FSL_DMA_SATR_SREAD_NO_SNOOP;
- dma->datr = FSL_DMA_DATR_DWRITE_NO_SNOOP;
- dma->sr = 0xffffffff; /* clear any errors */
+ out_be32(&dma->satr, FSL_DMA_SATR_SREAD_NO_SNOOP);
+ out_be32(&dma->datr, FSL_DMA_DATR_DWRITE_NO_SNOOP);
+ out_be32(&dma->sr, 0xffffffff); /* clear any errors */
dma_sync();
}
int dma_xfer(void *dest, uint count, void *src) {
volatile fsl_dma_t *dma = &dma_base->dma[0];
- dma->dar = (uint) dest;
- dma->sar = (uint) src;
- dma->bcr = count;
+ out_be32(&dma->dar, (uint) dest);
+ out_be32(&dma->sar, (uint) src);
+ out_be32(&dma->bcr, count);
/* Disable bandwidth control, use direct transfer mode */
- dma->mr = FSL_DMA_MR_BWC_DIS | FSL_DMA_MR_CTM_DIRECT;
+ out_be32(&dma->mr, FSL_DMA_MR_BWC_DIS | FSL_DMA_MR_CTM_DIRECT);
dma_sync();
/* Start the transfer */
- dma->mr = FSL_DMA_MR_BWC_DIS | FSL_DMA_MR_CTM_DIRECT | FSL_DMA_MR_CS;
+ out_be32(&dma->mr, FSL_DMA_MR_BWC_DIS |
+ FSL_DMA_MR_CTM_DIRECT |
+ FSL_DMA_MR_CS);
dma_sync();
return dma_check();
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