diff options
Diffstat (limited to 'arch/arm/mach-omap2/am33xx/ti816x_emif4.c')
| -rw-r--r-- | arch/arm/mach-omap2/am33xx/ti816x_emif4.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/am33xx/ti816x_emif4.c b/arch/arm/mach-omap2/am33xx/ti816x_emif4.c new file mode 100644 index 0000000000..2e7ea90da9 --- /dev/null +++ b/arch/arm/mach-omap2/am33xx/ti816x_emif4.c @@ -0,0 +1,165 @@ +/* + * ti816x_emif4.c + * + * TI816x emif4 configuration file + * + * Copyright (C) 2017, Konsulko Group + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/arch/cpu.h> +#include <asm/arch/ddr_defs.h> +#include <asm/arch/hardware.h> +#include <asm/arch/clock.h> +#include <asm/arch/sys_proto.h> +#include <asm/io.h> +#include <asm/emif.h> + +/********************************************************************* + * Init DDR3 on TI816X EVM + *********************************************************************/ +static void ddr_init_settings(const struct cmd_control *ctrl, int emif) +{ + /* + * setup use_rank_delays to 1. This is only necessary when + * multiple ranks are in use. Though the EVM does not have + * multiple ranks, this is a good value to set. + */ + writel(1, DDRPHY_CONFIG_BASE + 0x134); // DATA0_REG_PHY_USE_RANK0_DELAYS + writel(1, DDRPHY_CONFIG_BASE + 0x1d8); // DATA1_REG_PHY_USE_RANK0_DELAYS + writel(1, DDRPHY_CONFIG_BASE + 0x27c); // DATA2_REG_PHY_USE_RANK0_DELAYS + writel(1, DDRPHY_CONFIG_BASE + 0x320); // DATA3_REG_PHY_USE_RANK0_DELAYS + + config_cmd_ctrl(ctrl, emif); + + /* for ddr3 this needs to be set to 1 */ + writel(0x1, DDRPHY_CONFIG_BASE + 0x0F8); /* init mode */ + writel(0x1, DDRPHY_CONFIG_BASE + 0x104); + writel(0x1, DDRPHY_CONFIG_BASE + 0x19C); + writel(0x1, DDRPHY_CONFIG_BASE + 0x1A8); + writel(0x1, DDRPHY_CONFIG_BASE + 0x240); + writel(0x1, DDRPHY_CONFIG_BASE + 0x24C); + writel(0x1, DDRPHY_CONFIG_BASE + 0x2E4); + writel(0x1, DDRPHY_CONFIG_BASE + 0x2F0); + + /* + * This represents the initial value for the leveling process. The + * value is a ratio - so 0x100 represents one cycle. The real delay + * is determined through the leveling process. + * + * During the leveling process, 0x20 is subtracted from the value, so + * we have added that to the value we want to set. We also set the + * values such that byte3 completes leveling after byte2 and byte1 + * after byte0. + */ + writel((0x20 << 10) | 0x20, DDRPHY_CONFIG_BASE + 0x0F0); /* data0 writelvl init ratio */ + writel(0x0, DDRPHY_CONFIG_BASE + 0x0F4); /* */ + writel((0x20 << 10) | 0x20, DDRPHY_CONFIG_BASE + 0x194); /* data1 writelvl init ratio */ + writel(0x0, DDRPHY_CONFIG_BASE + 0x198); /* */ + writel((0x20 << 10) | 0x20, DDRPHY_CONFIG_BASE + 0x238); /* data2 writelvl init ratio */ + writel(0x0, DDRPHY_CONFIG_BASE + 0x23c); /* */ + writel((0x20 << 10) | 0x20, DDRPHY_CONFIG_BASE + 0x2dc); /* data3 writelvl init ratio */ + writel(0x0, DDRPHY_CONFIG_BASE + 0x2e0); /* */ + + + writel((0x20 << 10) | 0x20, DDRPHY_CONFIG_BASE + 0x0FC); /* data0 gatelvl init ratio */ + writel(0x0, DDRPHY_CONFIG_BASE + 0x100); + writel((0x20 << 10) | 0x20, DDRPHY_CONFIG_BASE + 0x1A0); /* data1 gatelvl init ratio */ + writel(0x0, DDRPHY_CONFIG_BASE + 0x1A4); + writel((0x20 << 10) | 0x20, DDRPHY_CONFIG_BASE + 0x244); /* data2 gatelvl init ratio */ + writel(0x0, DDRPHY_CONFIG_BASE + 0x248); + writel((0x20 << 10) | 0x20, DDRPHY_CONFIG_BASE + 0x2E8); /* data3 gatelvl init ratio */ + writel(0x0, DDRPHY_CONFIG_BASE + 0x2EC); + + writel(0x5, DDRPHY_CONFIG_BASE + 0x00C); /* cmd0 io config - output impedance of pad */ + writel(0x5, DDRPHY_CONFIG_BASE + 0x010); /* cmd0 io clk config - output impedance of pad */ + writel(0x5, DDRPHY_CONFIG_BASE + 0x040); /* cmd1 io config - output impedance of pad */ + writel(0x5, DDRPHY_CONFIG_BASE + 0x044); /* cmd1 io clk config - output impedance of pad */ + writel(0x5, DDRPHY_CONFIG_BASE + 0x074); /* cmd2 io config - output impedance of pad */ + writel(0x5, DDRPHY_CONFIG_BASE + 0x078); /* cmd2 io clk config - output impedance of pad */ + writel(0x4, DDRPHY_CONFIG_BASE + 0x0A8); /* data0 io config - output impedance of pad */ + writel(0x4, DDRPHY_CONFIG_BASE + 0x0AC); /* data0 io clk config - output impedance of pad */ + writel(0x4, DDRPHY_CONFIG_BASE + 0x14C); /* data1 io config - output impedance of pa */ + writel(0x4, DDRPHY_CONFIG_BASE + 0x150); /* data1 io clk config - output impedance of pad */ + writel(0x4, DDRPHY_CONFIG_BASE + 0x1F0); /* data2 io config - output impedance of pa */ + writel(0x4, DDRPHY_CONFIG_BASE + 0x1F4); /* data2 io clk config - output impedance of pad */ + writel(0x4, DDRPHY_CONFIG_BASE + 0x294); /* data3 io config - output impedance of pa */ + writel(0x4, DDRPHY_CONFIG_BASE + 0x298); /* data3 io clk config - output impedance of pad */ +} + +static void ddr3_sw_levelling(const struct ddr_data *data, int emif) +{ + /* Set the correct value to DDR_VTP_CTRL_0 */ + writel(0x6, (DDRPHY_CONFIG_BASE + 0x358)); + + writel(data->datafwsratio0, (DDRPHY_CONFIG_BASE + 0x108)); + writel(data->datafwsratio0, (DDRPHY_CONFIG_BASE + 0x1AC)); + writel(data->datafwsratio0, (DDRPHY_CONFIG_BASE + 0x250)); + writel(data->datafwsratio0, (DDRPHY_CONFIG_BASE + 0x2F4)); + + writel(data->datawdsratio0, (DDRPHY_CONFIG_BASE + 0x0DC)); + writel(data->datawdsratio0, (DDRPHY_CONFIG_BASE + 0x180)); + writel(data->datawdsratio0, (DDRPHY_CONFIG_BASE + 0x224)); + writel(data->datawdsratio0, (DDRPHY_CONFIG_BASE + 0x2C8)); + + writel(data->datawrsratio0, (DDRPHY_CONFIG_BASE + 0x120)); + writel(data->datawrsratio0, (DDRPHY_CONFIG_BASE + 0x1C4)); + writel(data->datawrsratio0, (DDRPHY_CONFIG_BASE + 0x268)); + writel(data->datawrsratio0, (DDRPHY_CONFIG_BASE + 0x30C)); + + writel(data->datardsratio0, (DDRPHY_CONFIG_BASE + 0x0C8)); + writel(data->datardsratio0, (DDRPHY_CONFIG_BASE + 0x16C)); + writel(data->datardsratio0, (DDRPHY_CONFIG_BASE + 0x210)); + writel(data->datardsratio0, (DDRPHY_CONFIG_BASE + 0x2B4)); +} + +static struct dmm_lisa_map_regs *hw_lisa_map_regs = + (struct dmm_lisa_map_regs *)DMM_BASE; + +#define DMM_PAT_BASE_ADDR (DMM_BASE + 0x420) +void config_dmm(const struct dmm_lisa_map_regs *regs) +{ + writel(0, &hw_lisa_map_regs->dmm_lisa_map_3); + writel(0, &hw_lisa_map_regs->dmm_lisa_map_2); + writel(0, &hw_lisa_map_regs->dmm_lisa_map_1); + writel(0, &hw_lisa_map_regs->dmm_lisa_map_0); + + writel(regs->dmm_lisa_map_3, &hw_lisa_map_regs->dmm_lisa_map_3); + writel(regs->dmm_lisa_map_2, &hw_lisa_map_regs->dmm_lisa_map_2); + writel(regs->dmm_lisa_map_1, &hw_lisa_map_regs->dmm_lisa_map_1); + writel(regs->dmm_lisa_map_0, &hw_lisa_map_regs->dmm_lisa_map_0); + + /* Enable Tiled Access */ + writel(0x80000000, DMM_PAT_BASE_ADDR); +} + +void config_ddr(const struct ddr_data *data, const struct cmd_control *ctrl, + const struct emif_regs *regs, + const struct dmm_lisa_map_regs *lisa_regs, int nrs) +{ + int i; + + enable_emif_clocks(); + + for (i = 0; i < nrs; i++) + ddr_init_settings(ctrl, i); + + enable_dmm_clocks(); + + /* Program the DMM to for non-interleaved configuration */ + config_dmm(lisa_regs); + + /* Program EMIF CFG Registers */ + for (i = 0; i < nrs; i++) { + set_sdram_timings(regs, i); + config_sdram(regs, i); + } + + udelay(1000); + for (i = 0; i < nrs; i++) + ddr3_sw_levelling(data, i); + + udelay(50000); /* Some delay needed */ +} |