diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/include/asm/dma.h | 13 | ||||
| -rw-r--r-- | arch/arm/kernel/dma-isa.c | 13 |
2 files changed, 9 insertions, 17 deletions
diff --git a/arch/arm/include/asm/dma.h b/arch/arm/include/asm/dma.h index c5557a650d1..59f59c6c79f 100644 --- a/arch/arm/include/asm/dma.h +++ b/arch/arm/include/asm/dma.h @@ -26,12 +26,15 @@ */ typedef unsigned int dmamode_t; -#define DMA_MODE_MASK 3 +/* + * The DMA modes reflect the settings for the ISA DMA controller + */ +#define DMA_MODE_MASK 0xcc -#define DMA_MODE_READ 0 -#define DMA_MODE_WRITE 1 -#define DMA_MODE_CASCADE 2 -#define DMA_AUTOINIT 4 +#define DMA_MODE_READ 0x44 +#define DMA_MODE_WRITE 0x48 +#define DMA_MODE_CASCADE 0xc0 +#define DMA_AUTOINIT 0x10 extern spinlock_t dma_spin_lock; diff --git a/arch/arm/kernel/dma-isa.c b/arch/arm/kernel/dma-isa.c index da02a7ff341..0e88e46fc73 100644 --- a/arch/arm/kernel/dma-isa.c +++ b/arch/arm/kernel/dma-isa.c @@ -24,11 +24,6 @@ #include <asm/dma.h> #include <asm/mach/dma.h> -#define ISA_DMA_MODE_READ 0x44 -#define ISA_DMA_MODE_WRITE 0x48 -#define ISA_DMA_MODE_CASCADE 0xc0 -#define ISA_DMA_AUTOINIT 0x10 - #define ISA_DMA_MASK 0 #define ISA_DMA_MODE 1 #define ISA_DMA_CLRFF 2 @@ -67,20 +62,17 @@ static void isa_enable_dma(unsigned int chan, dma_t *dma) unsigned int mode; enum dma_data_direction direction; - mode = chan & 3; + mode = (chan & 3) | dma->dma_mode; switch (dma->dma_mode & DMA_MODE_MASK) { case DMA_MODE_READ: - mode |= ISA_DMA_MODE_READ; direction = DMA_FROM_DEVICE; break; case DMA_MODE_WRITE: - mode |= ISA_DMA_MODE_WRITE; direction = DMA_TO_DEVICE; break; case DMA_MODE_CASCADE: - mode |= ISA_DMA_MODE_CASCADE; direction = DMA_BIDIRECTIONAL; break; @@ -121,9 +113,6 @@ static void isa_enable_dma(unsigned int chan, dma_t *dma) outb(length, isa_dma_port[chan][ISA_DMA_COUNT]); outb(length >> 8, isa_dma_port[chan][ISA_DMA_COUNT]); - if (dma->dma_mode & DMA_AUTOINIT) - mode |= ISA_DMA_AUTOINIT; - outb(mode, isa_dma_port[chan][ISA_DMA_MODE]); dma->invalid = 0; } |