diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-omap2/gpmc.c | 11 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/plat/gpmc.h | 5 |
2 files changed, 11 insertions, 5 deletions
diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c index 382dea83e4f0..674174365f78 100644 --- a/arch/arm/mach-omap2/gpmc.c +++ b/arch/arm/mach-omap2/gpmc.c @@ -60,7 +60,6 @@ #define GPMC_CHUNK_SHIFT 24 /* 16 MB */ #define GPMC_SECTION_SHIFT 28 /* 128 MB */ -#define PREFETCH_FIFOTHRESHOLD (0x40 << 8) #define CS_NUM_SHIFT 24 #define ENABLE_PREFETCH (0x1 << 7) #define DMA_MPU_MODE 2 @@ -606,15 +605,19 @@ EXPORT_SYMBOL(gpmc_nand_write); /** * gpmc_prefetch_enable - configures and starts prefetch transfer * @cs: cs (chip select) number + * @fifo_th: fifo threshold to be used for read/ write * @dma_mode: dma mode enable (1) or disable (0) * @u32_count: number of bytes to be transferred * @is_write: prefetch read(0) or write post(1) mode */ -int gpmc_prefetch_enable(int cs, int dma_mode, +int gpmc_prefetch_enable(int cs, int fifo_th, int dma_mode, unsigned int u32_count, int is_write) { - if (!(gpmc_read_reg(GPMC_PREFETCH_CONTROL))) { + if (fifo_th > PREFETCH_FIFOTHRESHOLD_MAX) { + pr_err("gpmc: fifo threshold is not supported\n"); + return -1; + } else if (!(gpmc_read_reg(GPMC_PREFETCH_CONTROL))) { /* Set the amount of bytes to be prefetched */ gpmc_write_reg(GPMC_PREFETCH_CONFIG2, u32_count); @@ -622,7 +625,7 @@ int gpmc_prefetch_enable(int cs, int dma_mode, * enable the engine. Set which cs is has requested for. */ gpmc_write_reg(GPMC_PREFETCH_CONFIG1, ((cs << CS_NUM_SHIFT) | - PREFETCH_FIFOTHRESHOLD | + PREFETCH_FIFOTHRESHOLD(fifo_th) | ENABLE_PREFETCH | (dma_mode << DMA_MPU_MODE) | (0x1 & is_write))); diff --git a/arch/arm/plat-omap/include/plat/gpmc.h b/arch/arm/plat-omap/include/plat/gpmc.h index 9c060da0a873..a2434639063d 100644 --- a/arch/arm/plat-omap/include/plat/gpmc.h +++ b/arch/arm/plat-omap/include/plat/gpmc.h @@ -83,6 +83,9 @@ #define GPMC_IRQ_FIFOEVENTENABLE 0x01 #define GPMC_IRQ_COUNT_EVENT 0x02 +#define PREFETCH_FIFOTHRESHOLD_MAX 0x40 +#define PREFETCH_FIFOTHRESHOLD(val) ((val) << 8) + /* * Note that all values in this struct are in nanoseconds except sync_clk * (which is in picoseconds), while the register values are in gpmc_fck cycles. @@ -134,7 +137,7 @@ extern int gpmc_cs_request(int cs, unsigned long size, unsigned long *base); extern void gpmc_cs_free(int cs); extern int gpmc_cs_set_reserved(int cs, int reserved); extern int gpmc_cs_reserved(int cs); -extern int gpmc_prefetch_enable(int cs, int dma_mode, +extern int gpmc_prefetch_enable(int cs, int fifo_th, int dma_mode, unsigned int u32_count, int is_write); extern int gpmc_prefetch_reset(int cs); extern void omap3_gpmc_save_context(void); |
