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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2022 Marek Vasut <marex@denx.de>
*/
#include <common.h>
#include <hang.h>
#include <image.h>
#include <init.h>
#include <spl.h>
#include <asm/io.h>
#include <asm-generic/gpio.h>
#include <asm/arch/clock.h>
#include <asm/arch/imx8mp_pins.h>
#include <asm/arch/sys_proto.h>
#include <asm/mach-imx/boot_mode.h>
#include <asm/arch/ddr.h>
#include <asm/sections.h>
#include <dm/uclass.h>
#include <dm/device.h>
#include <dm/uclass-internal.h>
#include <dm/device-internal.h>
#include <linux/bitfield.h>
#include <power/pmic.h>
#include <power/pca9450.h>
#include "lpddr4_timing.h"
DECLARE_GLOBAL_DATA_PTR;
#define UART_PAD_CTRL (PAD_CTL_DSE6 | PAD_CTL_FSEL1)
#define WDOG_PAD_CTRL (PAD_CTL_DSE6 | PAD_CTL_ODE | PAD_CTL_PUE | PAD_CTL_PE)
static const iomux_v3_cfg_t uart_pads[] = {
MX8MP_PAD_SAI2_RXFS__UART1_DCE_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
MX8MP_PAD_SAI2_RXC__UART1_DCE_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
};
static const iomux_v3_cfg_t wdog_pads[] = {
MX8MP_PAD_GPIO1_IO02__WDOG1_WDOG_B | MUX_PAD_CTRL(WDOG_PAD_CTRL),
};
static bool dh_gigabit_eqos, dh_gigabit_fec;
static u8 dh_som_rev;
static void dh_imx8mp_early_init_f(void)
{
struct wdog_regs *wdog = (struct wdog_regs *)WDOG1_BASE_ADDR;
imx_iomux_v3_setup_multiple_pads(wdog_pads, ARRAY_SIZE(wdog_pads));
set_wdog_reset(wdog);
imx_iomux_v3_setup_multiple_pads(uart_pads, ARRAY_SIZE(uart_pads));
}
static int dh_imx8mp_board_power_init(void)
{
struct udevice *dev;
int ret;
ret = pmic_get("pmic@25", &dev);
if (ret == -ENODEV) {
puts("Failed to get PMIC\n");
return 0;
}
if (ret != 0)
return ret;
/* BUCKxOUT_DVS0/1 control BUCK123 output. */
pmic_reg_write(dev, PCA9450_BUCK123_DVS, 0x29);
/* Increase VDD_SOC to typical value 0.95V before first DRAM access. */
if (IS_ENABLED(CONFIG_IMX8M_VDD_SOC_850MV))
/* Set DVS0 to 0.85V for special case. */
pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS0, 0x14);
else
pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS0, 0x1c);
/* Set DVS1 to 0.85v for suspend. */
pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS1, 0x14);
/*
* Enable DVS control through PMIC_STBY_REQ and
* set B1_ENMODE=1 (ON by PMIC_ON_REQ=H).
*/
pmic_reg_write(dev, PCA9450_BUCK1CTRL, 0x59);
/* Kernel uses OD/OD frequency for SoC. */
/* To avoid timing risk from SoC to ARM, increase VDD_ARM to OD voltage 0.95V */
pmic_reg_write(dev, PCA9450_BUCK2OUT_DVS0, 0x1c);
/* Set LDO4 and CONFIG2 to enable the I2C level translator. */
pmic_reg_write(dev, PCA9450_LDO4CTRL, 0x59);
pmic_reg_write(dev, PCA9450_CONFIG2, 0x1);
return 0;
}
static struct dram_timing_info *dram_timing_info[8] = {
NULL, /* 512 MiB */
NULL, /* 1024 MiB */
NULL, /* 1536 MiB */
&dh_imx8mp_dhcom_dram_timing_16g_x32, /* 2048 MiB */
NULL, /* 3072 MiB */
&dh_imx8mp_dhcom_dram_timing_32g_x32, /* 4096 MiB */
NULL, /* 6144 MiB */
NULL, /* 8192 MiB */
};
static void spl_dram_init(void)
{
const u16 size[] = { 512, 1024, 1536, 2048, 3072, 4096, 6144, 8192 };
u8 memcfg = dh_get_memcfg();
int i;
printf("DDR: %d MiB [0x%x]\n", size[memcfg], memcfg);
if (!dram_timing_info[memcfg]) {
printf("Unsupported DRAM strapping, trying lowest supported. MEMCFG=0x%x\n",
memcfg);
for (i = 0; i < ARRAY_SIZE(dram_timing_info); i++)
if (dram_timing_info[i]) /* Configuration found */
break;
}
ddr_init(dram_timing_info[memcfg]);
}
void spl_board_init(void)
{
/*
* Set GIC clock to 500 MHz for OD VDD_SOC. Kernel driver does not
* allow to change it. Should set the clock after PMIC setting done.
* Default is 400 MHz (system_pll1_800m with div = 2) set by ROM for
* ND VDD_SOC.
*/
clock_enable(CCGR_GIC, 0);
clock_set_target_val(GIC_CLK_ROOT, CLK_ROOT_ON | CLK_ROOT_SOURCE_SEL(5));
clock_enable(CCGR_GIC, 1);
}
int spl_board_boot_device(enum boot_device boot_dev_spl)
{
return BOOT_DEVICE_BOOTROM;
}
int board_spl_fit_append_fdt_skip(const char *name)
{
if (!dh_gigabit_eqos) { /* 1x or 2x RMII PHY SoM */
if (dh_gigabit_fec) { /* 1x RMII PHY SoM */
if (!strcmp(name, "fdt-dto-imx8mp-dhcom-som-overlay-eth1xfast"))
return 0;
} else { /* 2x RMII PHY SoM */
if (!strcmp(name, "fdt-dto-imx8mp-dhcom-som-overlay-eth2xfast"))
return 0;
if (!strcmp(name, "fdt-dto-imx8mp-dhcom-pdk-overlay-eth2xfast")) {
/* 2x RMII PHY SoM on PDK2 or PDK3 */
if (of_machine_is_compatible("dh,imx8mp-dhcom-pdk2") ||
of_machine_is_compatible("dh,imx8mp-dhcom-pdk3"))
return 0;
}
}
}
if (dh_som_rev == 0x0) { /* Prototype SoM rev.100 */
if (!strcmp(name, "fdt-dto-imx8mp-dhcom-som-overlay-rev100"))
return 0;
if (!strcmp(name, "fdt-dto-imx8mp-dhcom-pdk3-overlay-rev100") &&
of_machine_is_compatible("dh,imx8mp-dhcom-pdk3"))
return 0;
}
return 1; /* Skip this DTO */
}
static void dh_imx8mp_board_cache_config(void)
{
const void __iomem *mux_base = (void __iomem *)IOMUXC_BASE_ADDR;
const u32 mux_sion[] = {
FIELD_GET(MUX_CTRL_OFS_MASK, MX8MP_PAD_ENET_RX_CTL__GPIO1_IO24),
FIELD_GET(MUX_CTRL_OFS_MASK, MX8MP_PAD_SAI1_TXFS__GPIO4_IO10),
FIELD_GET(MUX_CTRL_OFS_MASK, MX8MP_PAD_NAND_DQS__GPIO3_IO14),
FIELD_GET(MUX_CTRL_OFS_MASK, MX8MP_PAD_SAI1_TXD7__GPIO4_IO19),
FIELD_GET(MUX_CTRL_OFS_MASK, MX8MP_PAD_SAI5_MCLK__GPIO3_IO25),
};
int i;
for (i = 0; i < ARRAY_SIZE(mux_sion); i++)
setbits_le32(mux_base + mux_sion[i], IOMUX_CONFIG_SION);
dh_gigabit_eqos = !(readl(GPIO1_BASE_ADDR) & BIT(24));
dh_gigabit_fec = !(readl(GPIO4_BASE_ADDR) & BIT(10));
dh_som_rev = !!(readl(GPIO3_BASE_ADDR) & BIT(14));
dh_som_rev |= !!(readl(GPIO4_BASE_ADDR) & BIT(19)) << 1;
dh_som_rev |= !!(readl(GPIO3_BASE_ADDR) & BIT(25)) << 2;
for (i = 0; i < ARRAY_SIZE(mux_sion); i++)
clrbits_le32(mux_base + mux_sion[i], IOMUX_CONFIG_SION);
}
void board_init_f(ulong dummy)
{
struct udevice *dev;
int ret;
arch_cpu_init();
init_uart_clk(0);
dh_imx8mp_early_init_f();
preloader_console_init();
/* Clear the BSS. */
memset(__bss_start, 0, __bss_end - __bss_start);
ret = spl_early_init();
if (ret) {
debug("spl_early_init() failed: %d\n", ret);
hang();
}
ret = uclass_get_device_by_name(UCLASS_CLK,
"clock-controller@30380000",
&dev);
if (ret < 0) {
printf("Failed to find clock node. Check device tree\n");
hang();
}
enable_tzc380();
dh_imx8mp_board_power_init();
/* DDR initialization */
spl_dram_init();
dh_imx8mp_board_cache_config();
board_init_r(NULL, 0);
}
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