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ARM: uniphier: refactor UMC init code for PH1-sLD8 

Move frequency-dependent register settings to arrays for clean-up.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
utp
Masahiro Yamada 2016-02-26 14:21:44 +09:00
parent 6257a0b0e9
commit 82e5950802
1 changed files with 29 additions and 8 deletions
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37
arch/arm/mach-uniphier/dram/umc-ph1-sld8.c
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@ -13,6 +13,14 @@
#include "ddrphy-regs.h"
#include "umc-regs.h"
enum dram_size {
DRAM_SZ_128M,
DRAM_SZ_256M,
DRAM_SZ_NR,
};
static u32 umc_spcctla[DRAM_SZ_NR] = {0x00240512, 0x00350512};
static void umc_start_ssif(void __iomem *ssif_base)
{
writel(0x00000000, ssif_base + 0x0000b004);
@ -47,17 +55,28 @@ 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, bool ddr3plus)
static int umc_dramcont_init(void __iomem *dramcont, void __iomem *ca_base,
int size, int freq, bool ddr3plus)
{
enum dram_size size_e;
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(ddr3plus ? 0x45990b11 : 0x55990b11, dramcont + UMC_CMDCTLA);
writel(ddr3plus ? 0x16958924 : 0x16958944, dramcont + UMC_CMDCTLB);
if (size == 1)
writel(0x00240512, dramcont + UMC_SPCCTLA);
else if (size == 2)
writel(0x00350512, dramcont + UMC_SPCCTLA);
writel(umc_spcctla[size_e], dramcont + UMC_SPCCTLA);
writel(0x00ff0006, dramcont + UMC_SPCCTLB);
writel(0x000a00ac, dramcont + UMC_RDATACTL_D0);
writel(0x04060806, dramcont + UMC_WDATACTL_D0);
@ -78,6 +97,8 @@ 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)