diff options
Diffstat (limited to 'include/asm-arm/dma.h')
| -rw-r--r-- | include/asm-arm/dma.h | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/include/asm-arm/dma.h b/include/asm-arm/dma.h index d8b9f1d3a..9fb7a0242 100644 --- a/include/asm-arm/dma.h +++ b/include/asm-arm/dma.h @@ -3,9 +3,24 @@ typedef unsigned int dmach_t; +#include <linux/config.h> +#include <linux/kernel.h> #include <asm/irq.h> +#include <asm/system.h> +#include <asm/spinlock.h> #include <asm/arch/dma.h> +/* + * DMA modes - we have two, IN and OUT + */ +typedef unsigned int dmamode_t; + +#define DMA_MODE_MASK 1 + +#define DMA_MODE_READ 0 +#define DMA_MODE_WRITE 1 +#define DMA_AUTOINIT 2 + typedef struct { unsigned long address; unsigned long length; @@ -13,6 +28,20 @@ typedef struct { extern const char dma_str[]; +extern spinlock_t dma_spin_lock; + +extern __inline__ unsigned long claim_dma_lock(void) +{ + unsigned long flags; + spin_lock_irqsave(&dma_spin_lock, flags); + return flags; +} + +extern __inline__ void release_dma_lock(unsigned long flags) +{ + spin_unlock_irqrestore(&dma_spin_lock, flags); +} + /* Clear the 'DMA Pointer Flip Flop'. * Write 0 for LSB/MSB, 1 for MSB/LSB access. * @@ -26,7 +55,7 @@ extern const char dma_str[]; * NOTE: This is an architecture specific function, and should * be hidden from the drivers */ -static __inline__ void set_dma_page(dmach_t channel, char pagenr) +extern __inline__ void set_dma_page(dmach_t channel, char pagenr) { printk(dma_str, "set_dma_page", channel); } @@ -102,4 +131,10 @@ extern int get_dma_residue(dmach_t channel); #define NO_DMA 255 #endif +#ifdef CONFIG_PCI_QUIRKS +extern int isa_dma_bridge_buggy; +#else +#define isa_dma_bridge_buggy (0) +#endif + #endif /* _ARM_DMA_H */ |