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/*
* SPL specific code for Compulab CM-T335 board
*
* Board functions for Compulab CM-T335 board
*
* Copyright (C) 2013, Compulab Ltd - http://compulab.co.il/
*
* Author: Ilya Ledvich <ilya@compulab.co.il>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <errno.h>
#include <asm/arch/ddr_defs.h>
#include <asm/arch/clock.h>
#include <asm/arch/clocks_am33xx.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/hardware_am33xx.h>
#include <linux/sizes.h>
const struct ctrl_ioregs ioregs = {
.cm0ioctl = MT41J128MJT125_IOCTRL_VALUE,
.cm1ioctl = MT41J128MJT125_IOCTRL_VALUE,
.cm2ioctl = MT41J128MJT125_IOCTRL_VALUE,
.dt0ioctl = MT41J128MJT125_IOCTRL_VALUE,
.dt1ioctl = MT41J128MJT125_IOCTRL_VALUE,
};
static const struct ddr_data ddr3_data = {
.datardsratio0 = MT41J128MJT125_RD_DQS,
.datawdsratio0 = MT41J128MJT125_WR_DQS,
.datafwsratio0 = MT41J128MJT125_PHY_FIFO_WE,
.datawrsratio0 = MT41J128MJT125_PHY_WR_DATA,
};
static const struct cmd_control ddr3_cmd_ctrl_data = {
.cmd0csratio = MT41J128MJT125_RATIO,
.cmd0iclkout = MT41J128MJT125_INVERT_CLKOUT,
.cmd1csratio = MT41J128MJT125_RATIO,
.cmd1iclkout = MT41J128MJT125_INVERT_CLKOUT,
.cmd2csratio = MT41J128MJT125_RATIO,
.cmd2iclkout = MT41J128MJT125_INVERT_CLKOUT,
};
static struct emif_regs ddr3_emif_reg_data = {
.sdram_config = MT41J128MJT125_EMIF_SDCFG,
.ref_ctrl = MT41J128MJT125_EMIF_SDREF,
.sdram_tim1 = MT41J128MJT125_EMIF_TIM1,
.sdram_tim2 = MT41J128MJT125_EMIF_TIM2,
.sdram_tim3 = MT41J128MJT125_EMIF_TIM3,
.zq_config = MT41J128MJT125_ZQ_CFG,
.emif_ddr_phy_ctlr_1 = MT41J128MJT125_EMIF_READ_LATENCY |
PHY_EN_DYN_PWRDN,
};
const struct dpll_params dpll_ddr = {
/* M N M2 M3 M4 M5 M6 */
303, (V_OSCK/1000000) - 1, 1, -1, -1, -1, -1};
void am33xx_spl_board_init(void)
{
struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
/* Get the frequency */
dpll_mpu_opp100.m = am335x_get_efuse_mpu_max_freq(cdev);
/* Set CORE Frequencies to OPP100 */
do_setup_dpll(&dpll_core_regs, &dpll_core_opp100);
/* Set MPU Frequency to what we detected now that voltages are set */
do_setup_dpll(&dpll_mpu_regs, &dpll_mpu_opp100);
}
const struct dpll_params *get_dpll_ddr_params(void)
{
return &dpll_ddr;
}
static void probe_sdram_size(long size)
{
switch (size) {
case SZ_512M:
ddr3_emif_reg_data.sdram_config = MT41J256MJT125_EMIF_SDCFG;
break;
case SZ_256M:
ddr3_emif_reg_data.sdram_config = MT41J128MJT125_EMIF_SDCFG;
break;
case SZ_128M:
ddr3_emif_reg_data.sdram_config = MT41J64MJT125_EMIF_SDCFG;
break;
default:
puts("Failed configuring DRAM, resetting...\n\n");
reset_cpu(0);
}
debug("%s: setting DRAM size to %ldM\n", __func__, size >> 20);
config_ddr(303, &ioregs, &ddr3_data,
&ddr3_cmd_ctrl_data, &ddr3_emif_reg_data, 0);
}
void sdram_init(void)
{
long size = SZ_1G;
do {
size = size / 2;
probe_sdram_size(size);
} while (get_ram_size((void *)CONFIG_SYS_SDRAM_BASE, size) < size);
return;
}
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