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// SPDX-License-Identifier: GPL-2.0
/*
* AM642: SoC specific initialization
*
* Copyright (C) 2020-2021 Texas Instruments Incorporated - https://www.ti.com/
* Keerthy <j-keerthy@ti.com>
* Dave Gerlach <d-gerlach@ti.com>
*/
#include <fdt_support.h>
#include <spl.h>
#include <asm/io.h>
#include <asm/arch/hardware.h>
#include "sysfw-loader.h"
#include "common.h"
#include <linux/soc/ti/ti_sci_protocol.h>
#include <dm.h>
#include <dm/uclass-internal.h>
#include <dm/pinctrl.h>
#include <mmc.h>
#include <dm/root.h>
#include <command.h>
#define CTRLMMR_MCU_RST_CTRL 0x04518170
#define CTRLMMR_MCU_RST_SRC (MCU_CTRL_MMR0_BASE + 0x18178)
#define COLD_BOOT 0
#define SW_POR_MCU BIT(24)
#define SW_POR_MAIN BIT(25)
static void ctrl_mmr_unlock(void)
{
/* Unlock all PADCFG_MMR1 module registers */
mmr_unlock(PADCFG_MMR1_BASE, 1);
/* Unlock all MCU_CTRL_MMR0 module registers */
mmr_unlock(MCU_CTRL_MMR0_BASE, 0);
mmr_unlock(MCU_CTRL_MMR0_BASE, 1);
mmr_unlock(MCU_CTRL_MMR0_BASE, 2);
mmr_unlock(MCU_CTRL_MMR0_BASE, 3);
mmr_unlock(MCU_CTRL_MMR0_BASE, 4);
mmr_unlock(MCU_CTRL_MMR0_BASE, 6);
/* Unlock all CTRL_MMR0 module registers */
mmr_unlock(CTRL_MMR0_BASE, 0);
mmr_unlock(CTRL_MMR0_BASE, 1);
mmr_unlock(CTRL_MMR0_BASE, 2);
mmr_unlock(CTRL_MMR0_BASE, 3);
mmr_unlock(CTRL_MMR0_BASE, 5);
mmr_unlock(CTRL_MMR0_BASE, 6);
/* Unlock all MCU_PADCFG_MMR1 module registers */
mmr_unlock(MCU_PADCFG_MMR1_BASE, 1);
}
/*
* This uninitialized global variable would normal end up in the .bss section,
* but the .bss is cleared between writing and reading this variable, so move
* it to the .data section.
*/
u32 bootindex __section(".data");
static struct rom_extended_boot_data bootdata __section(".data");
static void store_boot_info_from_rom(void)
{
bootindex = *(u32 *)(CONFIG_SYS_K3_BOOT_PARAM_TABLE_INDEX);
memcpy(&bootdata, (uintptr_t *)ROM_EXTENDED_BOOT_DATA_INFO,
sizeof(struct rom_extended_boot_data));
}
#if defined(CONFIG_K3_LOAD_SYSFW) && CONFIG_IS_ENABLED(DM_MMC)
void k3_mmc_stop_clock(void)
{
if (spl_boot_device() == BOOT_DEVICE_MMC1) {
struct mmc *mmc = find_mmc_device(0);
if (!mmc)
return;
mmc->saved_clock = mmc->clock;
mmc_set_clock(mmc, 0, true);
}
}
void k3_mmc_restart_clock(void)
{
if (spl_boot_device() == BOOT_DEVICE_MMC1) {
struct mmc *mmc = find_mmc_device(0);
if (!mmc)
return;
mmc_set_clock(mmc, mmc->saved_clock, false);
}
}
#else
void k3_mmc_stop_clock(void) {}
void k3_mmc_restart_clock(void) {}
#endif
#ifdef CONFIG_SPL_OF_LIST
void do_dt_magic(void)
{
int ret, rescan;
/* Perform board detection */
do_board_detect();
/*
* Board detection has been done.
* Let us see if another dtb wouldn't be a better match
* for our board
*/
if (IS_ENABLED(CONFIG_CPU_V7R)) {
ret = fdtdec_resetup(&rescan);
if (!ret && rescan) {
dm_uninit();
dm_init_and_scan(true);
}
}
}
#endif
#if CONFIG_IS_ENABLED(USB_STORAGE)
static int fixup_usb_boot(const void *fdt_blob)
{
int ret = 0;
switch (spl_boot_device()) {
case BOOT_DEVICE_USB:
/*
* If the boot mode is host, fixup the dr_mode to host
* before cdns3 bind takes place
*/
ret = fdt_find_and_setprop((void *)fdt_blob,
"/bus@f4000/cdns-usb@f900000/usb@f400000",
"dr_mode", "host", 5, 0);
if (ret)
printf("%s: fdt_find_and_setprop() failed:%d\n",
__func__, ret);
fallthrough;
default:
break;
}
return ret;
}
int fdtdec_board_setup(const void *fdt_blob)
{
/* Can use the pointer from the function parameters */
return fixup_usb_boot(fdt_blob);
}
#endif
#if defined(CONFIG_ESM_K3)
static void enable_mcu_esm_reset(void)
{
/* Set CTRLMMR_MCU_RST_CTRL:MCU_ESM_ERROR_RST_EN_Z to '0' (low active) */
u32 stat = readl(CTRLMMR_MCU_RST_CTRL);
stat &= 0xFFFDFFFF;
writel(stat, CTRLMMR_MCU_RST_CTRL);
}
#endif
void board_init_f(ulong dummy)
{
#if defined(CONFIG_K3_LOAD_SYSFW) || defined(CONFIG_K3_AM64_DDRSS) || defined(CONFIG_ESM_K3)
struct udevice *dev;
int ret;
int rst_src;
#endif
#if defined(CONFIG_CPU_V7R)
setup_k3_mpu_regions();
#endif
/*
* Cannot delay this further as there is a chance that
* K3_BOOT_PARAM_TABLE_INDEX can be over written by SPL MALLOC section.
*/
store_boot_info_from_rom();
ctrl_mmr_unlock();
/* Init DM early */
spl_early_init();
preloader_console_init();
#if defined(CONFIG_K3_LOAD_SYSFW)
/*
* Process pinctrl for serial3 a.k.a. MAIN UART1 module and continue
* regardless of the result of pinctrl. Do this without probing the
* device, but instead by searching the device that would request the
* given sequence number if probed. The UART will be used by the system
* firmware (SYSFW) image for various purposes and SYSFW depends on us
* to initialize its pin settings.
*/
ret = uclass_find_device_by_seq(UCLASS_SERIAL, 3, &dev);
if (!ret)
pinctrl_select_state(dev, "default");
/*
* Load, start up, and configure system controller firmware.
* This will determine whether or not ROM has already loaded
* system firmware and if so, will only perform needed config
* and not attempt to load firmware again.
*/
k3_sysfw_loader(is_rom_loaded_sysfw(&bootdata), k3_mmc_stop_clock,
k3_mmc_restart_clock);
#endif
#if defined(CONFIG_CPU_V7R)
/*
* Errata ID i2331 CPSW: A device lockup can occur during the second
* read of any CPSW subsystem register after any MAIN domain power on
* reset (POR). A MAIN domain POR occurs using the hardware MCU_PORz
* signal, or via software using CTRLMMR_RST_CTRL.SW_MAIN_POR or
* CTRLMMR_MCU_RST_CTRL.SW_MAIN_POR. After these resets, the processor
* and internal bus structures may get into a state which is only
* recoverable with full device reset using MCU_PORz.
* Workaround(s): To avoid the lockup, a warm reset should be issued
* after a MAIN domain POR and before any access to the CPSW registers.
* The warm reset realigns internal clocks and prevents the lockup from
* happening.
*/
ret = uclass_first_device_err(UCLASS_SYSRESET, &dev);
if (ret)
printf("\n%s:uclass device error [%d]\n",__func__,ret);
rst_src = readl(CTRLMMR_MCU_RST_SRC);
if (rst_src == COLD_BOOT || rst_src & (SW_POR_MCU | SW_POR_MAIN)) {
printf("Resetting on cold boot to workaround ErrataID:i2331\n");
printf("Please resend tiboot3.bin in case of UART/DFU boot\n");
do_reset(NULL, 0, 0, NULL);
}
#endif
/* Output System Firmware version info */
k3_sysfw_print_ver();
do_dt_magic();
#if defined(CONFIG_ESM_K3)
/* Probe/configure ESM0 */
ret = uclass_get_device_by_name(UCLASS_MISC, "esm@420000", &dev);
if (ret)
printf("esm main init failed: %d\n", ret);
/* Probe/configure MCUESM */
ret = uclass_get_device_by_name(UCLASS_MISC, "esm@4100000", &dev);
if (ret)
printf("esm mcu init failed: %d\n", ret);
enable_mcu_esm_reset();
#endif
#if defined(CONFIG_K3_AM64_DDRSS)
ret = uclass_get_device(UCLASS_RAM, 0, &dev);
if (ret)
panic("DRAM init failed: %d\n", ret);
#endif
if (IS_ENABLED(CONFIG_SPL_ETH) && IS_ENABLED(CONFIG_TI_AM65_CPSW_NUSS) &&
spl_boot_device() == BOOT_DEVICE_ETHERNET) {
struct udevice *cpswdev;
if (uclass_get_device_by_driver(UCLASS_MISC, DM_DRIVER_GET(am65_cpsw_nuss), &cpswdev))
printf("Failed to probe am65_cpsw_nuss driver\n");
}
}
u32 spl_mmc_boot_mode(struct mmc *mmc, const u32 boot_device)
{
switch (boot_device) {
case BOOT_DEVICE_MMC1:
return MMCSD_MODE_EMMCBOOT;
case BOOT_DEVICE_MMC2:
return MMCSD_MODE_FS;
default:
return MMCSD_MODE_RAW;
}
}
static u32 __get_backup_bootmedia(u32 main_devstat)
{
u32 bkup_bootmode =
(main_devstat & MAIN_DEVSTAT_BACKUP_BOOTMODE_MASK) >>
MAIN_DEVSTAT_BACKUP_BOOTMODE_SHIFT;
u32 bkup_bootmode_cfg =
(main_devstat & MAIN_DEVSTAT_BACKUP_BOOTMODE_CFG_MASK) >>
MAIN_DEVSTAT_BACKUP_BOOTMODE_CFG_SHIFT;
switch (bkup_bootmode) {
case BACKUP_BOOT_DEVICE_UART:
return BOOT_DEVICE_UART;
case BACKUP_BOOT_DEVICE_DFU:
if (bkup_bootmode_cfg & MAIN_DEVSTAT_BACKUP_USB_MODE_MASK)
return BOOT_DEVICE_USB;
return BOOT_DEVICE_DFU;
case BACKUP_BOOT_DEVICE_ETHERNET:
return BOOT_DEVICE_ETHERNET;
case BACKUP_BOOT_DEVICE_MMC:
if (bkup_bootmode_cfg)
return BOOT_DEVICE_MMC2;
return BOOT_DEVICE_MMC1;
case BACKUP_BOOT_DEVICE_SPI:
return BOOT_DEVICE_SPI;
case BACKUP_BOOT_DEVICE_I2C:
return BOOT_DEVICE_I2C;
};
return BOOT_DEVICE_RAM;
}
static u32 __get_primary_bootmedia(u32 main_devstat)
{
u32 bootmode = (main_devstat & MAIN_DEVSTAT_PRIMARY_BOOTMODE_MASK) >>
MAIN_DEVSTAT_PRIMARY_BOOTMODE_SHIFT;
u32 bootmode_cfg =
(main_devstat & MAIN_DEVSTAT_PRIMARY_BOOTMODE_CFG_MASK) >>
MAIN_DEVSTAT_PRIMARY_BOOTMODE_CFG_SHIFT;
switch (bootmode) {
case BOOT_DEVICE_OSPI:
fallthrough;
case BOOT_DEVICE_QSPI:
fallthrough;
case BOOT_DEVICE_XSPI:
fallthrough;
case BOOT_DEVICE_SPI:
return BOOT_DEVICE_SPI;
case BOOT_DEVICE_ETHERNET_RGMII:
fallthrough;
case BOOT_DEVICE_ETHERNET_RMII:
return BOOT_DEVICE_ETHERNET;
case BOOT_DEVICE_EMMC:
return BOOT_DEVICE_MMC1;
case BOOT_DEVICE_NAND:
return BOOT_DEVICE_NAND;
case BOOT_DEVICE_MMC:
if ((bootmode_cfg & MAIN_DEVSTAT_PRIMARY_MMC_PORT_MASK) >>
MAIN_DEVSTAT_PRIMARY_MMC_PORT_SHIFT)
return BOOT_DEVICE_MMC2;
return BOOT_DEVICE_MMC1;
case BOOT_DEVICE_DFU:
if ((bootmode_cfg & MAIN_DEVSTAT_PRIMARY_USB_MODE_MASK) >>
MAIN_DEVSTAT_PRIMARY_USB_MODE_SHIFT)
return BOOT_DEVICE_USB;
return BOOT_DEVICE_DFU;
case BOOT_DEVICE_NOBOOT:
return BOOT_DEVICE_RAM;
}
return bootmode;
}
u32 spl_boot_device(void)
{
u32 devstat = readl(CTRLMMR_MAIN_DEVSTAT);
if (bootindex == K3_PRIMARY_BOOTMODE)
return __get_primary_bootmedia(devstat);
else
return __get_backup_bootmedia(devstat);
}