arch/arm/mach-rockchip/rk3399-board-spl.c - platform/external/u-boot - Gitiles

 // 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>
 #include <dm/pinctrl.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(RK3399_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);
 }

 #define TIMER_CHN10_BASE	0xff8680a0
 #define TIMER_END_COUNT_L	0x00
 #define TIMER_END_COUNT_H	0x04
 #define TIMER_INIT_COUNT_L	0x10
 #define TIMER_INIT_COUNT_H	0x14
 #define TIMER_CONTROL_REG	0x1c

 #define TIMER_EN	0x1
 #define	TIMER_FMODE	(0 << 1)
 #define	TIMER_RMODE	(1 << 1)

 void secure_timer_init(void)
 {
 	writel(0xffffffff, TIMER_CHN10_BASE + TIMER_END_COUNT_L);
 	writel(0xffffffff, TIMER_CHN10_BASE + TIMER_END_COUNT_H);
 	writel(0, TIMER_CHN10_BASE + TIMER_INIT_COUNT_L);
 	writel(0, TIMER_CHN10_BASE + TIMER_INIT_COUNT_H);
 	writel(TIMER_EN | TIMER_FMODE, TIMER_CHN10_BASE + TIMER_CONTROL_REG);
 }


 void board_init_f(ulong dummy)
 {
 	struct udevice *pinctrl;
 	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);

 	secure_timer_init();

 	ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 	if (ret) {
 		pr_err("Pinctrl init failed: %d\n", ret);
 		return;
 	}

 	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
	// 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>
	#include <dm/pinctrl.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(RK3399_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);
	}

	#define TIMER_CHN10_BASE 0xff8680a0
	#define TIMER_END_COUNT_L 0x00
	#define TIMER_END_COUNT_H 0x04
	#define TIMER_INIT_COUNT_L 0x10
	#define TIMER_INIT_COUNT_H 0x14
	#define TIMER_CONTROL_REG 0x1c

	#define TIMER_EN 0x1
	#define TIMER_FMODE (0 << 1)
	#define TIMER_RMODE (1 << 1)

	void secure_timer_init(void)
	{
	writel(0xffffffff, TIMER_CHN10_BASE + TIMER_END_COUNT_L);
	writel(0xffffffff, TIMER_CHN10_BASE + TIMER_END_COUNT_H);
	writel(0, TIMER_CHN10_BASE + TIMER_INIT_COUNT_L);
	writel(0, TIMER_CHN10_BASE + TIMER_INIT_COUNT_H);
	writel(TIMER_EN \| TIMER_FMODE, TIMER_CHN10_BASE + TIMER_CONTROL_REG);
	}


	void board_init_f(ulong dummy)
	{
	struct udevice *pinctrl;
	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);

	secure_timer_init();

	ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
	if (ret) {
	pr_err("Pinctrl init failed: %d\n", ret);
	return;
	}

	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