diff options
| -rw-r--r-- | arch/arm/cpu/armv7/sunxi/dram.c | 27 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-sunxi/dram.h | 3 |
2 files changed, 16 insertions, 14 deletions
diff --git a/arch/arm/cpu/armv7/sunxi/dram.c b/arch/arm/cpu/armv7/sunxi/dram.c index 47017d2df1..30483913b3 100644 --- a/arch/arm/cpu/armv7/sunxi/dram.c +++ b/arch/arm/cpu/armv7/sunxi/dram.c @@ -152,23 +152,28 @@ static void mctl_enable_dll0(u32 phase) udelay(22); } +/* Get the number of DDR byte lanes */ +static u32 mctl_get_number_of_lanes(void) +{ + struct sunxi_dram_reg *dram = (struct sunxi_dram_reg *)SUNXI_DRAMC_BASE; + if ((readl(&dram->dcr) & DRAM_DCR_BUS_WIDTH_MASK) == + DRAM_DCR_BUS_WIDTH(DRAM_DCR_BUS_WIDTH_32BIT)) + return 4; + else + return 2; +} + /* * Note: This differs from pm/standby in that it checks the bus width */ static void mctl_enable_dllx(u32 phase) { struct sunxi_dram_reg *dram = (struct sunxi_dram_reg *)SUNXI_DRAMC_BASE; - u32 i, n, bus_width; - - bus_width = readl(&dram->dcr); + u32 i, number_of_lanes; - if ((bus_width & DRAM_DCR_BUS_WIDTH_MASK) == - DRAM_DCR_BUS_WIDTH(DRAM_DCR_BUS_WIDTH_32BIT)) - n = DRAM_DCR_NR_DLLCR_32BIT; - else - n = DRAM_DCR_NR_DLLCR_16BIT; + number_of_lanes = mctl_get_number_of_lanes(); - for (i = 1; i < n; i++) { + for (i = 1; i <= number_of_lanes; i++) { clrsetbits_le32(&dram->dllcr[i], 0xf << 14, (phase & 0xf) << 14); clrsetbits_le32(&dram->dllcr[i], DRAM_DLLCR_NRESET, @@ -177,12 +182,12 @@ static void mctl_enable_dllx(u32 phase) } udelay(2); - for (i = 1; i < n; i++) + for (i = 1; i <= number_of_lanes; i++) clrbits_le32(&dram->dllcr[i], DRAM_DLLCR_NRESET | DRAM_DLLCR_DISABLE); udelay(22); - for (i = 1; i < n; i++) + for (i = 1; i <= number_of_lanes; i++) clrsetbits_le32(&dram->dllcr[i], DRAM_DLLCR_DISABLE, DRAM_DLLCR_NRESET); udelay(22); diff --git a/arch/arm/include/asm/arch-sunxi/dram.h b/arch/arm/include/asm/arch-sunxi/dram.h index 11e35077f4..71301dbf33 100644 --- a/arch/arm/include/asm/arch-sunxi/dram.h +++ b/arch/arm/include/asm/arch-sunxi/dram.h @@ -122,9 +122,6 @@ struct dram_para { #define DRAM_DCR_BUS_WIDTH_32BIT 0x3 #define DRAM_DCR_BUS_WIDTH_16BIT 0x1 #define DRAM_DCR_BUS_WIDTH_8BIT 0x0 -#define DRAM_DCR_NR_DLLCR_32BIT 5 -#define DRAM_DCR_NR_DLLCR_16BIT 3 -#define DRAM_DCR_NR_DLLCR_8BIT 2 #define DRAM_DCR_RANK_SEL(n) (((n) & 0x3) << 10) #define DRAM_DCR_RANK_SEL_MASK DRAM_DCR_CMD_RANK(0x3) #define DRAM_DCR_CMD_RANK_ALL (0x1 << 12) |
