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/*
* Copyright (C) 2017 DENX Software Engineering
* Lukasz Majewski, DENX Software Engineering, lukma@denx.de
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <spl.h>
#include <libfdt.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/mx6-ddr.h>
#include <asm/arch/mx6-pins.h>
#include "asm/arch/crm_regs.h"
#include <asm/arch/sys_proto.h>
#include <asm/arch/imx-regs.h>
#include "asm/arch/iomux.h"
#include <asm/mach-imx/iomux-v3.h>
#include <environment.h>
#include <fsl_esdhc.h>
#include <netdev.h>
#include "common.h"
DECLARE_GLOBAL_DATA_PTR;
static const struct mx6dq_iomux_ddr_regs mx6_ddr_ioregs = {
.dram_sdclk_0 = 0x00000030,
.dram_sdclk_1 = 0x00000030,
.dram_cas = 0x00000030,
.dram_ras = 0x00000030,
.dram_reset = 0x00000030,
.dram_sdcke0 = 0x00003000,
.dram_sdcke1 = 0x00003000,
.dram_sdba2 = 0x00000000,
.dram_sdodt0 = 0x00000030,
.dram_sdodt1 = 0x00000030,
.dram_sdqs0 = 0x00000030,
.dram_sdqs1 = 0x00000030,
.dram_sdqs2 = 0x00000030,
.dram_sdqs3 = 0x00000030,
.dram_sdqs4 = 0x00000030,
.dram_sdqs5 = 0x00000030,
.dram_sdqs6 = 0x00000030,
.dram_sdqs7 = 0x00000030,
.dram_dqm0 = 0x00000030,
.dram_dqm1 = 0x00000030,
.dram_dqm2 = 0x00000030,
.dram_dqm3 = 0x00000030,
.dram_dqm4 = 0x00000030,
.dram_dqm5 = 0x00000030,
.dram_dqm6 = 0x00000030,
.dram_dqm7 = 0x00000030,
};
static const struct mx6dq_iomux_grp_regs mx6_grp_ioregs = {
.grp_ddr_type = 0x000c0000,
.grp_ddrmode_ctl = 0x00020000,
.grp_ddrpke = 0x00000000,
.grp_addds = 0x00000030,
.grp_ctlds = 0x00000030,
.grp_ddrmode = 0x00020000,
.grp_b0ds = 0x00000030,
.grp_b1ds = 0x00000030,
.grp_b2ds = 0x00000030,
.grp_b3ds = 0x00000030,
.grp_b4ds = 0x00000030,
.grp_b5ds = 0x00000030,
.grp_b6ds = 0x00000030,
.grp_b7ds = 0x00000030,
};
/* 4x128Mx16.cfg */
static const struct mx6_mmdc_calibration mx6_4x256mx16_mmdc_calib = {
.p0_mpwldectrl0 = 0x002D0028,
.p0_mpwldectrl1 = 0x0032002D,
.p1_mpwldectrl0 = 0x00210036,
.p1_mpwldectrl1 = 0x0019002E,
.p0_mpdgctrl0 = 0x4349035C,
.p0_mpdgctrl1 = 0x0348033D,
.p1_mpdgctrl0 = 0x43550362,
.p1_mpdgctrl1 = 0x03520316,
.p0_mprddlctl = 0x41393940,
.p1_mprddlctl = 0x3F3A3C47,
.p0_mpwrdlctl = 0x413A423A,
.p1_mpwrdlctl = 0x4042483E,
};
/* MT41K128M16JT-125 (2Gb density) */
static const struct mx6_ddr3_cfg mt41k128m16jt_125 = {
.mem_speed = 1600,
.density = 2,
.width = 16,
.banks = 8,
.rowaddr = 14,
.coladdr = 10,
.pagesz = 2,
.trcd = 1375,
.trcmin = 4875,
.trasmin = 3500,
};
static void ccgr_init(void)
{
struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
writel(0x00C03F3F, &ccm->CCGR0);
writel(0x0030FC3F, &ccm->CCGR1);
writel(0x0FFFCFC0, &ccm->CCGR2);
writel(0x3FF00000, &ccm->CCGR3);
writel(0x00FFF300, &ccm->CCGR4);
writel(0x0F0000C3, &ccm->CCGR5);
writel(0x000003FF, &ccm->CCGR6);
}
static void spl_dram_init(void)
{
struct mx6_ddr_sysinfo sysinfo = {
/* width of data bus:0=16,1=32,2=64 */
.dsize = 2,
/* config for full 4GB range so that get_mem_size() works */
.cs_density = 32, /* 32Gb per CS */
/* single chip select */
.ncs = 1,
.cs1_mirror = 0,
.rtt_wr = 1 /*DDR3_RTT_60_OHM*/, /* RTT_Wr = RZQ/4 */
.rtt_nom = 2 /*DDR3_RTT_120_OHM*/, /* RTT_Nom = RZQ/2 */
.walat = 1, /* Write additional latency */
.ralat = 5, /* Read additional latency */
.mif3_mode = 3, /* Command prediction working mode */
.bi_on = 1, /* Bank interleaving enabled */
.sde_to_rst = 0x10, /* 14 cycles, 200us (JEDEC default) */
.rst_to_cke = 0x23, /* 33 cycles, 500us (JEDEC default) */
.pd_fast_exit = 1, /* enable precharge power-down fast exit */
.ddr_type = DDR_TYPE_DDR3,
.refsel = 1, /* Refresh cycles at 32KHz */
.refr = 7, /* 8 refresh commands per refresh cycle */
};
mx6dq_dram_iocfg(64, &mx6_ddr_ioregs, &mx6_grp_ioregs);
mx6_dram_cfg(&sysinfo, &mx6_4x256mx16_mmdc_calib, &mt41k128m16jt_125);
}
#ifdef CONFIG_SPL_SPI_SUPPORT
static void displ5_init_ecspi(void)
{
displ5_set_iomux_ecspi_spl();
enable_spi_clk(1, 1);
}
#else
static inline void displ5_init_ecspi(void) { }
#endif
#ifdef CONFIG_SPL_MMC_SUPPORT
static struct fsl_esdhc_cfg usdhc_cfg = {
.esdhc_base = USDHC4_BASE_ADDR,
.max_bus_width = 8,
};
int board_mmc_init(bd_t *bd)
{
displ5_set_iomux_usdhc_spl();
usdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC4_CLK);
gd->arch.sdhc_clk = usdhc_cfg.sdhc_clk;
return fsl_esdhc_initialize(bd, &usdhc_cfg);
}
#endif
void board_init_f(ulong dummy)
{
ccgr_init();
arch_cpu_init();
gpr_init();
/* setup GP timer */
timer_init();
displ5_set_iomux_uart_spl();
/* UART clocks enabled and gd valid - init serial console */
preloader_console_init();
displ5_init_ecspi();
/* DDR initialization */
spl_dram_init();
/* Clear the BSS. */
memset(__bss_start, 0, __bss_end - __bss_start);
/* load/boot image from boot device */
board_init_r(NULL, 0);
}
void board_boot_order(u32 *spl_boot_list)
{
/* Default boot sequence SPI -> MMC */
spl_boot_list[0] = spl_boot_device();
spl_boot_list[1] = BOOT_DEVICE_MMC1;
spl_boot_list[2] = BOOT_DEVICE_UART;
spl_boot_list[3] = BOOT_DEVICE_NONE;
#ifdef CONFIG_SPL_ENV_SUPPORT
/* 'fastboot' */
const char *s;
env_init();
env_load();
s = env_get("BOOT_FROM");
if (s && strcmp(s, "ACTIVE") == 0) {
spl_boot_list[0] = BOOT_DEVICE_MMC1;
spl_boot_list[1] = spl_boot_device();
}
#endif
}
void reset_cpu(ulong addr) {}
#ifdef CONFIG_SPL_LOAD_FIT
int board_fit_config_name_match(const char *name)
{
return 0;
}
#endif
#ifdef CONFIG_SPL_OS_BOOT
/* Return: 1 - boot to U-Boot. 0 - boot OS (falcon mode) */
int spl_start_uboot(void)
{
/* break into full u-boot on 'c' */
if (serial_tstc() && serial_getc() == 'c')
return 1;
#ifdef CONFIG_SPL_ENV_SUPPORT
if (env_get_yesno("boot_os") != 1)
return 1;
#endif
return 0;
}
#endif
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