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// SPDX-License-Identifier: GPL-2.0
/*
* AM625: SoC specific initialization
*
* Copyright (C) 2020-2022 Texas Instruments Incorporated - https://www.ti.com/
* Suman Anna <s-anna@ti.com>
*/
#include <spl.h>
#include <asm/io.h>
#include <asm/arch/hardware.h>
#include "sysfw-loader.h"
#include "common.h"
#include <dm.h>
#include <dm/uclass-internal.h>
#include <dm/pinctrl.h>
#define RTC_BASE_ADDRESS 0x2b1f0000
#define REG_K3RTC_S_CNT_LSW (RTC_BASE_ADDRESS + 0x18)
#define REG_K3RTC_KICK0 (RTC_BASE_ADDRESS + 0x70)
#define REG_K3RTC_KICK1 (RTC_BASE_ADDRESS + 0x74)
/* Magic values for lock/unlock */
#define K3RTC_KICK0_UNLOCK_VALUE 0x83e70b13
#define K3RTC_KICK1_UNLOCK_VALUE 0x95a4f1e0
/*
* 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));
}
static void ctrl_mmr_unlock(void)
{
/* Unlock all WKUP_CTRL_MMR0 module registers */
mmr_unlock(WKUP_CTRL_MMR0_BASE, 0);
mmr_unlock(WKUP_CTRL_MMR0_BASE, 1);
mmr_unlock(WKUP_CTRL_MMR0_BASE, 2);
mmr_unlock(WKUP_CTRL_MMR0_BASE, 3);
mmr_unlock(WKUP_CTRL_MMR0_BASE, 4);
mmr_unlock(WKUP_CTRL_MMR0_BASE, 5);
mmr_unlock(WKUP_CTRL_MMR0_BASE, 6);
mmr_unlock(WKUP_CTRL_MMR0_BASE, 7);
/* 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, 4);
mmr_unlock(CTRL_MMR0_BASE, 6);
/* 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 PADCFG_CTRL_MMR padconf registers */
mmr_unlock(PADCFG_MMR0_BASE, 1);
mmr_unlock(PADCFG_MMR1_BASE, 1);
}
static __maybe_unused 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 &= RST_CTRL_ESM_ERROR_RST_EN_Z_MASK;
writel(stat, CTRLMMR_MCU_RST_CTRL);
}
#if defined(CONFIG_CPU_V7R)
/*
* RTC Erratum i2327 Workaround for Silicon Revision 1
*
* Due to a bug in initial synchronization out of cold power on,
* IRQ status can get locked infinitely if we do not unlock RTC
*
* This workaround *must* be applied within 1 second of power on,
* So, this is closest point to be able to guarantee the max
* timing.
*
* https://www.ti.com/lit/er/sprz487c/sprz487c.pdf
*/
void rtc_erratumi2327_init(void)
{
u32 counter;
/*
* If counter has gone past 1, nothing we can do, leave
* system locked! This is the only way we know if RTC
* can be used for all practical purposes.
*/
counter = readl(REG_K3RTC_S_CNT_LSW);
if (counter > 1)
return;
/*
* Need to set this up at the very start
* MUST BE DONE under 1 second of boot.
*/
writel(K3RTC_KICK0_UNLOCK_VALUE, REG_K3RTC_KICK0);
writel(K3RTC_KICK1_UNLOCK_VALUE, REG_K3RTC_KICK1);
return;
}
#endif
void board_init_f(ulong dummy)
{
struct udevice *dev;
int ret;
#if defined(CONFIG_CPU_V7R)
setup_k3_mpu_regions();
rtc_erratumi2327_init();
#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();
/*
* Process pinctrl for the serial0 and serial3, aka WKUP_UART0 and
* MAIN_UART1 modules 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
* UARTs will be used by the DM firmware and TIFS firmware images
* respectively and the firmware depend on SPL to initialize the pin
* settings.
*/
ret = uclass_find_device_by_seq(UCLASS_SERIAL, 0, &dev);
if (!ret)
pinctrl_select_state(dev, "default");
ret = uclass_find_device_by_seq(UCLASS_SERIAL, 3, &dev);
if (!ret)
pinctrl_select_state(dev, "default");
preloader_console_init();
#ifdef CONFIG_K3_EARLY_CONS
/*
* Allow establishing an early console as required for example when
* doing a UART-based boot. Note that this console may not "survive"
* through a SYSFW PM-init step and will need a re-init in some way
* due to changing module clock frequencies.
*/
early_console_init();
#endif
#if defined(CONFIG_K3_LOAD_SYSFW)
/*
* Configure and start up system controller firmware. Provide
* the U-Boot console init function to the SYSFW post-PM configuration
* callback hook, effectively switching on (or over) the console
* output.
*/
ret = is_rom_loaded_sysfw(&bootdata);
if (!ret)
panic("ROM has not loaded TIFS firmware\n");
k3_sysfw_loader(true, NULL, NULL);
#endif
/*
* Force probe of clk_k3 driver here to ensure basic default clock
* configuration is always done.
*/
if (IS_ENABLED(CONFIG_SPL_CLK_K3)) {
ret = uclass_get_device_by_driver(UCLASS_CLK,
DM_DRIVER_GET(ti_clk),
&dev);
if (ret)
printf("Failed to initialize clk-k3!\n");
}
/* Output System Firmware version info */
k3_sysfw_print_ver();
if (IS_ENABLED(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();
}
#if defined(CONFIG_K3_AM64_DDRSS)
ret = uclass_get_device(UCLASS_RAM, 0, &dev);
if (ret)
panic("DRAM init failed: %d\n", ret);
#endif
spl_enable_dcache();
}
u32 spl_mmc_boot_mode(struct mmc *mmc, const u32 boot_device)
{
u32 devstat = readl(CTRLMMR_MAIN_DEVSTAT);
u32 bootmode = (devstat & MAIN_DEVSTAT_PRIMARY_BOOTMODE_MASK) >>
MAIN_DEVSTAT_PRIMARY_BOOTMODE_SHIFT;
u32 bootmode_cfg = (devstat & MAIN_DEVSTAT_PRIMARY_BOOTMODE_CFG_MASK) >>
MAIN_DEVSTAT_PRIMARY_BOOTMODE_CFG_SHIFT;
switch (bootmode) {
case BOOT_DEVICE_EMMC:
return MMCSD_MODE_EMMCBOOT;
case BOOT_DEVICE_MMC:
if (bootmode_cfg & MAIN_DEVSTAT_PRIMARY_MMC_FS_RAW_MASK)
return MMCSD_MODE_RAW;
default:
return MMCSD_MODE_FS;
}
}
static u32 __get_backup_bootmedia(u32 devstat)
{
u32 bkup_bootmode = (devstat & MAIN_DEVSTAT_BACKUP_BOOTMODE_MASK) >>
MAIN_DEVSTAT_BACKUP_BOOTMODE_SHIFT;
u32 bkup_bootmode_cfg =
(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_USB:
return BOOT_DEVICE_USB;
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;
case BACKUP_BOOT_DEVICE_DFU:
if (bkup_bootmode_cfg & MAIN_DEVSTAT_BACKUP_USB_MODE_MASK)
return BOOT_DEVICE_USB;
return BOOT_DEVICE_DFU;
};
return BOOT_DEVICE_RAM;
}
static u32 __get_primary_bootmedia(u32 devstat)
{
u32 bootmode = (devstat & MAIN_DEVSTAT_PRIMARY_BOOTMODE_MASK) >>
MAIN_DEVSTAT_PRIMARY_BOOTMODE_SHIFT;
u32 bootmode_cfg = (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_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);
u32 bootmedia;
if (bootindex == K3_PRIMARY_BOOTMODE)
bootmedia = __get_primary_bootmedia(devstat);
else
bootmedia = __get_backup_bootmedia(devstat);
debug("am625_init: %s: devstat = 0x%x bootmedia = 0x%x bootindex = %d\n",
__func__, devstat, bootmedia, bootindex);
return bootmedia;
}
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