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| author | Peter Tyser <ptyser@xes-inc.com> | 2009-06-30 17:15:42 -0500 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2009-07-01 23:02:24 -0500 |
| commit | a730393a362741c318b21771b8d7b2647e546c3e (patch) | |
| tree | 5f043d28018c46e2da16be0eb2df4ed93fe2063e /drivers/dma | |
| parent | 9c06071a6077ba95e9d43226156e39567d5d064a (diff) | |
| download | u-boot-imx-a730393a362741c318b21771b8d7b2647e546c3e.zip u-boot-imx-a730393a362741c318b21771b8d7b2647e546c3e.tar.gz u-boot-imx-a730393a362741c318b21771b8d7b2647e546c3e.tar.bz2 | |
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.c | 32 |
1 files changed, 18 insertions, 14 deletions
diff --git a/drivers/dma/fsl_dma.c b/drivers/dma/fsl_dma.c index baf2942..33ea828 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(); |