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// SPDX-License-Identifier: GPL-2.0+
/*
* ti816x_emif4.c
*
* TI816x emif4 configuration file
*
* Copyright (C) 2017, Konsulko Group
*/
#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>
#include <linux/delay.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 */
}
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