From 6213db78f4820816fc52c807dfab47bb3266c809 Mon Sep 17 00:00:00 2001 From: Lokesh Vutla Date: Wed, 3 Jun 2015 14:43:21 +0530 Subject: ARM: DRA7: DDR3: Add support for HW leveling DRA7 EMIF supports Full leveling for DDR3. Adding support for the Full leveling sequence. Signed-off-by: Lokesh Vutla Reviewed-by: Tom Rini --- arch/arm/cpu/armv7/omap5/sdram.c | 76 ++++++++++++++++++++++++++++++++++++++-- 1 file changed, 73 insertions(+), 3 deletions(-) (limited to 'arch/arm/cpu/armv7/omap5/sdram.c') diff --git a/arch/arm/cpu/armv7/omap5/sdram.c b/arch/arm/cpu/armv7/omap5/sdram.c index 5f8daa1ee1..2e2385286c 100644 --- a/arch/arm/cpu/armv7/omap5/sdram.c +++ b/arch/arm/cpu/armv7/omap5/sdram.c @@ -421,8 +421,14 @@ const u32 ddr3_ext_phy_ctrl_const_base_es2[] = { 0x0 }; +/* Ext phy ctrl 1-35 regs */ const u32 dra_ddr3_ext_phy_ctrl_const_base_es1_emif1[] = { + 0x10040100, + 0x00910091, + 0x00950095, + 0x009B009B, + 0x009E009E, 0x00980098, 0x00340034, 0x00350035, @@ -441,7 +447,7 @@ dra_ddr3_ext_phy_ctrl_const_base_es1_emif1[] = { 0x00500050, 0x00000000, 0x00600020, - 0x40010080, + 0x40011080, 0x08102040, 0x0, 0x0, @@ -450,8 +456,14 @@ dra_ddr3_ext_phy_ctrl_const_base_es1_emif1[] = { 0x0 }; +/* Ext phy ctrl 1-35 regs */ const u32 dra_ddr3_ext_phy_ctrl_const_base_es1_emif2[] = { + 0x10040100, + 0x00910091, + 0x00950095, + 0x009B009B, + 0x009E009E, 0x00980098, 0x00330033, 0x00330033, @@ -470,7 +482,7 @@ dra_ddr3_ext_phy_ctrl_const_base_es1_emif2[] = { 0x00500050, 0x00000000, 0x00600020, - 0x40010080, + 0x40011080, 0x08102040, 0x0, 0x0, @@ -479,8 +491,14 @@ dra_ddr3_ext_phy_ctrl_const_base_es1_emif2[] = { 0x0 }; +/* Ext phy ctrl 1-35 regs */ const u32 dra_ddr3_ext_phy_ctrl_const_base_666MHz[] = { + 0x10040100, + 0x00A400A4, + 0x00A900A9, + 0x00B000B0, + 0x00B000B0, 0x00A400A4, 0x00390039, 0x00320032, @@ -562,7 +580,7 @@ void get_lpddr2_mr_regs(const struct lpddr2_mr_regs **regs) *regs = &mr_regs; } -void do_ext_phy_settings(u32 base, const struct emif_regs *regs) +static void do_ext_phy_settings_omap5(u32 base, const struct emif_regs *regs) { u32 *ext_phy_ctrl_base = 0; u32 *emif_ext_phy_ctrl_base = 0; @@ -601,6 +619,58 @@ void do_ext_phy_settings(u32 base, const struct emif_regs *regs) } } +static void do_ext_phy_settings_dra7(u32 base, const struct emif_regs *regs) +{ + struct emif_reg_struct *emif = (struct emif_reg_struct *)base; + u32 *emif_ext_phy_ctrl_base = 0; + u32 emif_nr; + const u32 *ext_phy_ctrl_const_regs; + u32 i, hw_leveling, size; + + emif_nr = (base == EMIF1_BASE) ? 1 : 2; + + hw_leveling = regs->emif_rd_wr_lvl_rmp_ctl >> EMIF_REG_RDWRLVL_EN_SHIFT; + + emif_ext_phy_ctrl_base = (u32 *)&(emif->emif_ddr_ext_phy_ctrl_1); + + emif_get_ext_phy_ctrl_const_regs(emif_nr, + &ext_phy_ctrl_const_regs, &size); + + writel(ext_phy_ctrl_const_regs[0], &emif_ext_phy_ctrl_base[0]); + writel(ext_phy_ctrl_const_regs[0], &emif_ext_phy_ctrl_base[1]); + + if (!hw_leveling) { + /* + * Copy the predefined PHY register values + * in case of sw leveling + */ + for (i = 1; i < 25; i++) { + writel(ext_phy_ctrl_const_regs[i], + &emif_ext_phy_ctrl_base[i * 2]); + writel(ext_phy_ctrl_const_regs[i], + &emif_ext_phy_ctrl_base[i * 2 + 1]); + } + } else { + /* + * Write the init value for HW levling to occur + */ + for (i = 21; i < 35; i++) { + writel(ext_phy_ctrl_const_regs[i], + &emif_ext_phy_ctrl_base[i * 2]); + writel(ext_phy_ctrl_const_regs[i], + &emif_ext_phy_ctrl_base[i * 2 + 1]); + } + } +} + +void do_ext_phy_settings(u32 base, const struct emif_regs *regs) +{ + if (is_omap54xx()) + do_ext_phy_settings_omap5(base, regs); + else + do_ext_phy_settings_dra7(base, regs); +} + #ifndef CONFIG_SYS_DEFAULT_LPDDR2_TIMINGS static const struct lpddr2_ac_timings timings_jedec_532_mhz = { .max_freq = 532000000, -- cgit v1.2.1