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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2016 Rockchip Electronics Co., Ltd
* (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
*/
#include <common.h>
#include <debug_uart.h>
#include <dm.h>
#include <ram.h>
#include <spl.h>
#include <spl_gpio.h>
#include <syscon.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <asm/arch-rockchip/bootrom.h>
#include <asm/arch-rockchip/clock.h>
#include <asm/arch-rockchip/cru_rk3399.h>
#include <asm/arch-rockchip/grf_rk3399.h>
#include <asm/arch-rockchip/hardware.h>
#include <asm/arch-rockchip/periph.h>
#include <asm/arch-rockchip/sys_proto.h>
#include <power/regulator.h>
void board_return_to_bootrom(void)
{
back_to_bootrom(BROM_BOOT_NEXTSTAGE);
}
static const char * const boot_devices[BROM_LAST_BOOTSOURCE + 1] = {
[BROM_BOOTSOURCE_EMMC] = "/sdhci@fe330000",
[BROM_BOOTSOURCE_SPINOR] = "/spi@ff1d0000",
[BROM_BOOTSOURCE_SD] = "/dwmmc@fe320000",
};
const char *board_spl_was_booted_from(void)
{
u32 bootdevice_brom_id = readl(BROM_BOOTSOURCE_ID_ADDR);
const char *bootdevice_ofpath = NULL;
if (bootdevice_brom_id < ARRAY_SIZE(boot_devices))
bootdevice_ofpath = boot_devices[bootdevice_brom_id];
if (bootdevice_ofpath)
debug("%s: brom_bootdevice_id %x maps to '%s'\n",
__func__, bootdevice_brom_id, bootdevice_ofpath);
else
debug("%s: failed to resolve brom_bootdevice_id %x\n",
__func__, bootdevice_brom_id);
return bootdevice_ofpath;
}
u32 spl_boot_device(void)
{
u32 boot_device = BOOT_DEVICE_MMC1;
if (CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM))
return BOOT_DEVICE_BOOTROM;
return boot_device;
}
const char *spl_decode_boot_device(u32 boot_device)
{
int i;
static const struct {
u32 boot_device;
const char *ofpath;
} spl_boot_devices_tbl[] = {
{ BOOT_DEVICE_MMC1, "/dwmmc@fe320000" },
{ BOOT_DEVICE_MMC2, "/sdhci@fe330000" },
{ BOOT_DEVICE_SPI, "/spi@ff1d0000" },
};
for (i = 0; i < ARRAY_SIZE(spl_boot_devices_tbl); ++i)
if (spl_boot_devices_tbl[i].boot_device == boot_device)
return spl_boot_devices_tbl[i].ofpath;
return NULL;
}
void spl_perform_fixups(struct spl_image_info *spl_image)
{
void *blob = spl_image->fdt_addr;
const char *boot_ofpath;
int chosen;
/*
* Inject the ofpath of the device the full U-Boot (or Linux in
* Falcon-mode) was booted from into the FDT, if a FDT has been
* loaded at the same time.
*/
if (!blob)
return;
boot_ofpath = spl_decode_boot_device(spl_image->boot_device);
if (!boot_ofpath) {
pr_err("%s: could not map boot_device to ofpath\n", __func__);
return;
}
chosen = fdt_find_or_add_subnode(blob, 0, "chosen");
if (chosen < 0) {
pr_err("%s: could not find/create '/chosen'\n", __func__);
return;
}
fdt_setprop_string(blob, chosen,
"u-boot,spl-boot-device", boot_ofpath);
}
__weak void rockchip_stimer_init(void)
{
}
void board_init_f(ulong dummy)
{
struct udevice *dev;
struct rk3399_pmusgrf_regs *sgrf;
struct rk3399_grf_regs *grf;
int ret;
#ifdef CONFIG_DEBUG_UART
debug_uart_init();
# ifdef CONFIG_TARGET_CHROMEBOOK_BOB
int sum, i;
/*
* Add a delay and ensure that the compiler does not optimise this out.
* This is needed since the power rails tail a while to turn on, and
* we get garbage serial output otherwise.
*/
sum = 0;
for (i = 0; i < 150000; i++)
sum += i;
gru_dummy_function(sum);
#endif /* CONFIG_TARGET_CHROMEBOOK_BOB */
/*
* Debug UART can be used from here if required:
*
* debug_uart_init();
* printch('a');
* printhex8(0x1234);
* printascii("string");
*/
debug("U-Boot SPL board init\n");
#endif
ret = spl_early_init();
if (ret) {
debug("spl_early_init() failed: %d\n", ret);
hang();
}
/*
* Disable DDR and SRAM security regions.
*
* As we are entered from the BootROM, the region from
* 0x0 through 0xfffff (i.e. the first MB of memory) will
* be protected. This will cause issues with the DW_MMC
* driver, which tries to DMA from/to the stack (likely)
* located in this range.
*/
sgrf = syscon_get_first_range(ROCKCHIP_SYSCON_PMUSGRF);
rk_clrsetreg(&sgrf->ddr_rgn_con[16], 0x1ff, 0);
rk_clrreg(&sgrf->slv_secure_con4, 0x2000);
/* eMMC clock generator: disable the clock multipilier */
grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
rk_clrreg(&grf->emmccore_con[11], 0x0ff);
rockchip_stimer_init();
ret = uclass_get_device(UCLASS_RAM, 0, &dev);
if (ret) {
pr_err("DRAM init failed: %d\n", ret);
return;
}
}
#if defined(SPL_GPIO_SUPPORT)
static void rk3399_force_power_on_reset(void)
{
ofnode node;
struct gpio_desc sysreset_gpio;
debug("%s: trying to force a power-on reset\n", __func__);
node = ofnode_path("/config");
if (!ofnode_valid(node)) {
debug("%s: no /config node?\n", __func__);
return;
}
if (gpio_request_by_name_nodev(node, "sysreset-gpio", 0,
&sysreset_gpio, GPIOD_IS_OUT)) {
debug("%s: could not find a /config/sysreset-gpio\n", __func__);
return;
}
dm_gpio_set_value(&sysreset_gpio, 1);
}
#endif
void spl_board_init(void)
{
#if defined(SPL_GPIO_SUPPORT)
struct rk3399_cru *cru = rockchip_get_cru();
/*
* The RK3399 resets only 'almost all logic' (see also in the TRM
* "3.9.4 Global software reset"), when issuing a software reset.
* This may cause issues during boot-up for some configurations of
* the application software stack.
*
* To work around this, we test whether the last reset reason was
* a power-on reset and (if not) issue an overtemp-reset to reset
* the entire module.
*
* While this was previously fixed by modifying the various places
* that could generate a software reset (e.g. U-Boot's sysreset
* driver, the ATF or Linux), we now have it here to ensure that
* we no longer have to track this through the various components.
*/
if (cru->glb_rst_st != 0)
rk3399_force_power_on_reset();
#endif
#if defined(SPL_DM_REGULATOR)
/*
* Turning the eMMC and SPI back on (if disabled via the Qseven
* BIOS_ENABLE) signal is done through a always-on regulator).
*/
if (regulators_enable_boot_on(false))
debug("%s: Cannot enable boot on regulator\n", __func__);
#endif
preloader_console_init();
}
#ifdef CONFIG_SPL_LOAD_FIT
int board_fit_config_name_match(const char *name)
{
/* Just empty function now - can't decide what to choose */
debug("%s: %s\n", __func__, name);
return 0;
}
#endif
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