diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-uniphier/dram/umc-ph1-ld4.c | 79 |
1 files changed, 55 insertions, 24 deletions
diff --git a/arch/arm/mach-uniphier/dram/umc-ph1-ld4.c b/arch/arm/mach-uniphier/dram/umc-ph1-ld4.c index bee3ef4bff..353ef6939e 100644 --- a/arch/arm/mach-uniphier/dram/umc-ph1-ld4.c +++ b/arch/arm/mach-uniphier/dram/umc-ph1-ld4.c @@ -13,6 +13,27 @@ #include "ddrphy-regs.h" #include "umc-regs.h" +enum dram_freq { + DRAM_FREQ_1333M, + DRAM_FREQ_1600M, + DRAM_FREQ_NR, +}; + +enum dram_size { + DRAM_SZ_128M, + DRAM_SZ_256M, + DRAM_SZ_NR, +}; + +static u32 umc_cmdctla_plus[DRAM_FREQ_NR] = {0x45990b11, 0x36bb0f17}; +static u32 umc_cmdctlb_plus[DRAM_FREQ_NR] = {0x16958924, 0x18c6aa24}; +static u32 umc_spcctla[DRAM_FREQ_NR][DRAM_SZ_NR] = { + {0x00240512, 0x00350512}, + {0x002b0617, 0x003f0617}, +}; +static u32 umc_spcctlb[DRAM_FREQ_NR] = {0x00ff0006, 0x00ff0008}; +static u32 umc_rdatactl[DRAM_FREQ_NR] = {0x000a00ac, 0x000c00ae}; + static void umc_start_ssif(void __iomem *ssif_base) { writel(0x00000000, ssif_base + 0x0000b004); @@ -47,35 +68,43 @@ static void umc_start_ssif(void __iomem *ssif_base) writel(0x00000001, ssif_base + UMC_DMDRST); } -static void umc_dramcont_init(void __iomem *dramcont, void __iomem *ca_base, - int size, int freq) +static int umc_dramcont_init(void __iomem *dramcont, void __iomem *ca_base, + int size, int freq) { - if (freq == 1333) { - writel(0x45990b11, dramcont + UMC_CMDCTLA); - writel(0x16958924, dramcont + UMC_CMDCTLB); - } else if (freq == 1600) { - writel(0x36BB0F17, dramcont + UMC_CMDCTLA); - writel(0x18C6AA24, dramcont + UMC_CMDCTLB); + enum dram_freq freq_e; + enum dram_size size_e; + + switch (freq) { + case 1333: + freq_e = DRAM_FREQ_1333M; + break; + case 1600: + freq_e = DRAM_FREQ_1600M; + break; + default: + pr_err("unsupported DRAM frequency %d MHz\n", freq); + return -EINVAL; } - if (freq == 1333) { - if (size == 1) - writel(0x00240512, dramcont + UMC_SPCCTLA); - else if (size == 2) - writel(0x00350512, dramcont + UMC_SPCCTLA); - - writel(0x00ff0006, dramcont + UMC_SPCCTLB); - writel(0x000a00ac, dramcont + UMC_RDATACTL_D0); - } else if (freq == 1600) { - if (size == 1) - writel(0x002B0617, dramcont + UMC_SPCCTLA); - else if (size == 2) - writel(0x003F0617, dramcont + UMC_SPCCTLA); - - writel(0x00ff0008, dramcont + UMC_SPCCTLB); - writel(0x000c00ae, dramcont + UMC_RDATACTL_D0); + switch (size) { + case 0: + return 0; + case 1: + size_e = DRAM_SZ_128M; + break; + case 2: + size_e = DRAM_SZ_256M; + break; + default: + pr_err("unsupported DRAM size\n"); + return -EINVAL; } + writel(umc_cmdctla_plus[freq_e], dramcont + UMC_CMDCTLA); + writel(umc_cmdctlb_plus[freq_e], dramcont + UMC_CMDCTLB); + writel(umc_spcctla[freq_e][size_e], dramcont + UMC_SPCCTLA); + writel(umc_spcctlb[freq_e], dramcont + UMC_SPCCTLB); + writel(umc_rdatactl[freq_e], dramcont + UMC_RDATACTL_D0); writel(0x04060806, dramcont + UMC_WDATACTL_D0); writel(0x04a02000, dramcont + UMC_DATASET); writel(0x00000000, ca_base + 0x2300); @@ -94,6 +123,8 @@ static void umc_dramcont_init(void __iomem *dramcont, void __iomem *ca_base, writel(0x200a0a00, dramcont + UMC_SPCSETB); writel(0x00000000, dramcont + UMC_SPCSETD); writel(0x00000520, dramcont + UMC_DFICUPDCTLA); + + return 0; } static int umc_init_sub(int freq, int size_ch0, int size_ch1, bool ddr3plus) |
