diff options
Diffstat (limited to 'arch/arm/include/asm/dma.h')
| -rw-r--r-- | arch/arm/include/asm/dma.h | 46 |
1 files changed, 21 insertions, 25 deletions
diff --git a/arch/arm/include/asm/dma.h b/arch/arm/include/asm/dma.h index df5638f3643a..7edf3536df24 100644 --- a/arch/arm/include/asm/dma.h +++ b/arch/arm/include/asm/dma.h @@ -19,21 +19,17 @@ #include <asm/system.h> #include <asm/scatterlist.h> -typedef unsigned int dmach_t; - #include <mach/isa-dma.h> /* - * DMA modes + * The DMA modes reflect the settings for the ISA DMA controller */ -typedef unsigned int dmamode_t; - -#define DMA_MODE_MASK 3 +#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; @@ -52,44 +48,44 @@ static inline void release_dma_lock(unsigned long flags) /* Clear the 'DMA Pointer Flip Flop'. * Write 0 for LSB/MSB, 1 for MSB/LSB access. */ -#define clear_dma_ff(channel) +#define clear_dma_ff(chan) /* Set only the page register bits of the transfer address. * * NOTE: This is an architecture specific function, and should * be hidden from the drivers */ -extern void set_dma_page(dmach_t channel, char pagenr); +extern void set_dma_page(unsigned int chan, char pagenr); /* Request a DMA channel * * Some architectures may need to do allocate an interrupt */ -extern int request_dma(dmach_t channel, const char * device_id); +extern int request_dma(unsigned int chan, const char * device_id); /* Free a DMA channel * * Some architectures may need to do free an interrupt */ -extern void free_dma(dmach_t channel); +extern void free_dma(unsigned int chan); /* Enable DMA for this channel * * On some architectures, this may have other side effects like * enabling an interrupt and setting the DMA registers. */ -extern void enable_dma(dmach_t channel); +extern void enable_dma(unsigned int chan); /* Disable DMA for this channel * * On some architectures, this may have other side effects like * disabling an interrupt or whatever. */ -extern void disable_dma(dmach_t channel); +extern void disable_dma(unsigned int chan); /* Test whether the specified channel has an active DMA transfer */ -extern int dma_channel_active(dmach_t channel); +extern int dma_channel_active(unsigned int chan); /* Set the DMA scatter gather list for this channel * @@ -97,7 +93,7 @@ extern int dma_channel_active(dmach_t channel); * especially since some DMA architectures don't update the * DMA address immediately, but defer it to the enable_dma(). */ -extern void set_dma_sg(dmach_t channel, struct scatterlist *sg, int nr_sg); +extern void set_dma_sg(unsigned int chan, struct scatterlist *sg, int nr_sg); /* Set the DMA address for this channel * @@ -105,9 +101,9 @@ extern void set_dma_sg(dmach_t channel, struct scatterlist *sg, int nr_sg); * especially since some DMA architectures don't update the * DMA address immediately, but defer it to the enable_dma(). */ -extern void __set_dma_addr(dmach_t channel, void *addr); -#define set_dma_addr(channel, addr) \ - __set_dma_addr(channel, bus_to_virt(addr)) +extern void __set_dma_addr(unsigned int chan, void *addr); +#define set_dma_addr(chan, addr) \ + __set_dma_addr(chan, bus_to_virt(addr)) /* Set the DMA byte count for this channel * @@ -115,7 +111,7 @@ extern void __set_dma_addr(dmach_t channel, void *addr); * especially since some DMA architectures don't update the * DMA count immediately, but defer it to the enable_dma(). */ -extern void set_dma_count(dmach_t channel, unsigned long count); +extern void set_dma_count(unsigned int chan, unsigned long count); /* Set the transfer direction for this channel * @@ -124,11 +120,11 @@ extern void set_dma_count(dmach_t channel, unsigned long count); * DMA transfer direction immediately, but defer it to the * enable_dma(). */ -extern void set_dma_mode(dmach_t channel, dmamode_t mode); +extern void set_dma_mode(unsigned int chan, unsigned int mode); /* Set the transfer speed for this channel */ -extern void set_dma_speed(dmach_t channel, int cycle_ns); +extern void set_dma_speed(unsigned int chan, int cycle_ns); /* Get DMA residue count. After a DMA transfer, this * should return zero. Reading this while a DMA transfer is @@ -136,7 +132,7 @@ extern void set_dma_speed(dmach_t channel, int cycle_ns); * If called before the channel has been used, it may return 1. * Otherwise, it returns the number of _bytes_ left to transfer. */ -extern int get_dma_residue(dmach_t channel); +extern int get_dma_residue(unsigned int chan); #ifndef NO_DMA #define NO_DMA 255 |