diff options
Diffstat (limited to 'arch/arm/mach-uniphier/dram/ddrphy-ld4.c')
-rw-r--r-- | arch/arm/mach-uniphier/dram/ddrphy-ld4.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/dram/ddrphy-ld4.c b/arch/arm/mach-uniphier/dram/ddrphy-ld4.c new file mode 100644 index 0000000..eb9bf24 --- /dev/null +++ b/arch/arm/mach-uniphier/dram/ddrphy-ld4.c @@ -0,0 +1,77 @@ +/* + * Copyright (C) 2014-2015 Masahiro Yamada <yamada.masahiro@socionext.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <linux/err.h> +#include <linux/types.h> +#include <linux/io.h> + +#include "ddrphy-regs.h" + +enum dram_freq { + DRAM_FREQ_1333M, + DRAM_FREQ_1600M, + DRAM_FREQ_NR, +}; + +static u32 ddrphy_ptr0[DRAM_FREQ_NR] = {0x0a806844, 0x0c807d04}; +static u32 ddrphy_ptr1[DRAM_FREQ_NR] = {0x208e0124, 0x2710015E}; +static u32 ddrphy_ptr3[DRAM_FREQ_NR] = {0x0f051616, 0x12061A80}; +static u32 ddrphy_ptr4[DRAM_FREQ_NR] = {0x06ae08d6, 0x08027100}; +static u32 ddrphy_dtpr0[DRAM_FREQ_NR] = {0x85589955, 0x999cbb66}; +static u32 ddrphy_dtpr1[DRAM_FREQ_NR] = {0x1a8363c0, 0x1a878400}; +static u32 ddrphy_dtpr2[DRAM_FREQ_NR] = {0x5002c200, 0xa00214f8}; +static u32 ddrphy_mr0[DRAM_FREQ_NR] = {0x00000b51, 0x00000d71}; +static u32 ddrphy_mr2[DRAM_FREQ_NR] = {0x00000290, 0x00000298}; + +int ph1_ld4_ddrphy_init(struct ddrphy __iomem *phy, int freq, bool ddr3plus) +{ + enum dram_freq freq_e; + u32 tmp; + + switch (freq) { + case 1333: + freq_e = DRAM_FREQ_1333M; + break; + case 1600: + freq_e = DRAM_FREQ_1600M; + break; + default: + printf("unsupported DRAM frequency %d MHz\n", freq); + return -EINVAL; + } + + writel(0x0300c473, &phy->pgcr[1]); + writel(ddrphy_ptr0[freq_e], &phy->ptr[0]); + writel(ddrphy_ptr1[freq_e], &phy->ptr[1]); + writel(0x00083DEF, &phy->ptr[2]); + writel(ddrphy_ptr3[freq_e], &phy->ptr[3]); + writel(ddrphy_ptr4[freq_e], &phy->ptr[4]); + writel(0xF004001A, &phy->dsgcr); + + /* change the value of the on-die pull-up/pull-down registors */ + tmp = readl(&phy->dxccr); + tmp &= ~0x0ee0; + tmp |= DXCCR_DQSNRES_688_OHM | DXCCR_DQSRES_688_OHM; + writel(tmp, &phy->dxccr); + + writel(0x0000040B, &phy->dcr); + writel(ddrphy_dtpr0[freq_e], &phy->dtpr[0]); + writel(ddrphy_dtpr1[freq_e], &phy->dtpr[1]); + writel(ddrphy_dtpr2[freq_e], &phy->dtpr[2]); + writel(ddrphy_mr0[freq_e], &phy->mr0); + writel(0x00000006, &phy->mr1); + writel(ddrphy_mr2[freq_e], &phy->mr2); + writel(ddr3plus ? 0x00000800 : 0x00000000, &phy->mr3); + + while (!(readl(&phy->pgsr[0]) & PGSR0_IDONE)) + ; + + writel(0x0300C473, &phy->pgcr[1]); + writel(0x0000005D, &phy->zq[0].cr[1]); + + return 0; +} |