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