arch/arm/mach-tegra/board.c - u-boot - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /*
  *  (C) Copyright 2010-2015
  *  NVIDIA Corporation <www.nvidia.com>
  */

 #include <common.h>
 #include <cpu_func.h>
 #include <dm.h>
 #include <init.h>
 #include <log.h>
 #include <ns16550.h>
 #include <spl.h>
 #include <asm/cache.h>
 #include <asm/global_data.h>
 #include <asm/io.h>
 #if IS_ENABLED(CONFIG_TEGRA_CLKRST)
 #include <asm/arch/clock.h>
 #endif
 #if CONFIG_IS_ENABLED(PINCTRL_TEGRA)
 #include <asm/arch/funcmux.h>
 #endif
 #if IS_ENABLED(CONFIG_TEGRA_MC)
 #include <asm/arch/mc.h>
 #endif
 #include <asm/arch/tegra.h>
 #include <asm/arch-tegra/ap.h>
 #include <asm/arch-tegra/board.h>
 #include <asm/arch-tegra/cboot.h>
 #include <asm/arch-tegra/pmc.h>
 #include <asm/arch-tegra/sys_proto.h>
 #include <asm/arch-tegra/warmboot.h>

 void save_boot_params_ret(void);

 DECLARE_GLOBAL_DATA_PTR;

 enum {
 	/* UARTs which we can enable */
 	UARTA	= 1 << 0,
 	UARTB	= 1 << 1,
 	UARTC	= 1 << 2,
 	UARTD	= 1 << 3,
 	UARTE	= 1 << 4,
 	UART_COUNT = 5,
 };

 static bool from_spl __section(".data");

 #ifndef CONFIG_SPL_BUILD
 void save_boot_params(unsigned long r0, unsigned long r1, unsigned long r2,
 		      unsigned long r3)
 {
 	from_spl = r0 != UBOOT_NOT_LOADED_FROM_SPL;

 	/*
 	 * The logic for this is somewhat indirect. The purpose of the marker
 	 * (UBOOT_NOT_LOADED_FROM_SPL) is in fact used to determine if U-Boot
 	 * was loaded from a read-only instance of itself, which is something
 	 * that can happen in secure boot setups. So basically the presence
 	 * of the marker is an indication that U-Boot was loaded by one such
 	 * special variant of U-Boot. Conversely, the absence of the marker
 	 * indicates that this instance of U-Boot was loaded by something
 	 * other than a special U-Boot. This could be SPL, but it could just
 	 * as well be one of any number of other first stage bootloaders.
 	 */
 	if (from_spl)
 		cboot_save_boot_params(r0, r1, r2, r3);

 	save_boot_params_ret();
 }
 #endif

 bool spl_was_boot_source(void)
 {
 	return from_spl;
 }

 #if defined(CONFIG_TEGRA_SUPPORT_NON_SECURE)
 bool tegra_cpu_is_non_secure(void)
 {
 	/*
 	 * This register reads 0xffffffff in non-secure mode. This register
 	 * only implements bits 31:20, so the lower bits will always read 0 in
 	 * secure mode. Thus, the lower bits are an indicator for secure vs.
 	 * non-secure mode.
 	 */
 	struct mc_ctlr *mc = (struct mc_ctlr *)NV_PA_MC_BASE;
 	uint32_t mc_s_cfg0 = readl(&mc->mc_security_cfg0);
 	return (mc_s_cfg0 & 1) == 1;
 }
 #endif

 #if IS_ENABLED(CONFIG_TEGRA_MC)
 /* Read the RAM size directly from the memory controller */
 static phys_size_t query_sdram_size(void)
 {
 	struct mc_ctlr *const mc = (struct mc_ctlr *)NV_PA_MC_BASE;
 	u32 emem_cfg;
 	phys_size_t size_bytes;

 	emem_cfg = readl(&mc->mc_emem_cfg);
 #if defined(CONFIG_TEGRA20)
 	debug("mc->mc_emem_cfg (MEM_SIZE_KB) = 0x%08x\n", emem_cfg);
 	size_bytes = get_ram_size((void *)PHYS_SDRAM_1, emem_cfg * 1024);
 #else
 	debug("mc->mc_emem_cfg (MEM_SIZE_MB) = 0x%08x\n", emem_cfg);
 #ifndef CONFIG_PHYS_64BIT
 	/*
 	 * If >=4GB RAM is present, the byte RAM size won't fit into 32-bits
 	 * and will wrap. Clip the reported size to the maximum that a 32-bit
 	 * variable can represent (rounded to a page).
 	 */
 	if (emem_cfg >= 4096) {
 		size_bytes = U32_MAX & ~(0x1000 - 1);
 	} else
 #endif
 	{
 		/* RAM size EMC is programmed to. */
 		size_bytes = (phys_size_t)emem_cfg * 1024 * 1024;
 #ifndef CONFIG_ARM64
 		/*
 		 * If all RAM fits within 32-bits, it can be accessed without
 		 * LPAE, so go test the RAM size. Otherwise, we can't access
 		 * all the RAM, and get_ram_size() would get confused, so
 		 * avoid using it. There's no reason we should need this
 		 * validation step anyway.
 		 */
 		if (emem_cfg <= (0 - PHYS_SDRAM_1) / (1024 * 1024))
 			size_bytes = get_ram_size((void *)PHYS_SDRAM_1,
 						  size_bytes);
 #endif
 	}
 #endif

 #if defined(CONFIG_TEGRA30) || defined(CONFIG_TEGRA114)
 	/* External memory limited to 2047 MB due to IROM/HI-VEC */
 	if (size_bytes == SZ_2G)
 		size_bytes -= SZ_1M;
 #endif

 	return size_bytes;
 }
 #endif

 int dram_init(void)
 {
 	int err;

 	/* try to initialize DRAM from cboot DTB first */
 	err = cboot_dram_init();
 	if (err == 0)
 		return 0;

 #if IS_ENABLED(CONFIG_TEGRA_MC)
 	/* We do not initialise DRAM here. We just query the size */
 	gd->ram_size = query_sdram_size();
 #endif

 	return 0;
 }

 #if CONFIG_IS_ENABLED(PINCTRL_TEGRA)
 static int uart_configs[] = {
 #if defined(CONFIG_TEGRA20)
  #if defined(CONFIG_TEGRA_UARTA_UAA_UAB)
 	FUNCMUX_UART1_UAA_UAB,
  #elif defined(CONFIG_TEGRA_UARTA_GPU)
 	FUNCMUX_UART1_GPU,
  #elif defined(CONFIG_TEGRA_UARTA_SDIO1)
 	FUNCMUX_UART1_SDIO1,
  #else
 	FUNCMUX_UART1_IRRX_IRTX,
 #endif
 	FUNCMUX_UART2_UAD,
 	-1,
 	FUNCMUX_UART4_GMC,
 	-1,
 #elif defined(CONFIG_TEGRA30)
 	FUNCMUX_UART1_ULPI,	/* UARTA */
 	-1,
 	-1,
 	-1,
 	-1,
 #elif defined(CONFIG_TEGRA114)
 	-1,
 	-1,
 	-1,
 	FUNCMUX_UART4_GMI,	/* UARTD */
 	-1,
 #elif defined(CONFIG_TEGRA124)
 	FUNCMUX_UART1_KBC,	/* UARTA */
 	-1,
 	-1,
 	FUNCMUX_UART4_GPIO,	/* UARTD */
 	-1,
 #else	/* Tegra210 */
 	FUNCMUX_UART1_UART1,	/* UARTA */
 	-1,
 	-1,
 	FUNCMUX_UART4_UART4,	/* UARTD */
 	-1,
 #endif
 };

 /**
  * Set up the specified uarts
  *
  * @param uarts_ids	Mask containing UARTs to init (UARTx)
  */
 static void setup_uarts(int uart_ids)
 {
 	static enum periph_id id_for_uart[] = {
 		PERIPH_ID_UART1,
 		PERIPH_ID_UART2,
 		PERIPH_ID_UART3,
 		PERIPH_ID_UART4,
 		PERIPH_ID_UART5,
 	};
 	size_t i;

 	for (i = 0; i < UART_COUNT; i++) {
 		if (uart_ids & (1 << i)) {
 			enum periph_id id = id_for_uart[i];

 			funcmux_select(id, uart_configs[i]);
 			clock_ll_start_uart(id);
 		}
 	}
 }
 #endif

 void board_init_uart_f(void)
 {
 #if CONFIG_IS_ENABLED(PINCTRL_TEGRA)
 	int uart_ids = 0;	/* bit mask of which UART ids to enable */

 #ifdef CONFIG_TEGRA_ENABLE_UARTA
 	uart_ids |= UARTA;
 #endif
 #ifdef CONFIG_TEGRA_ENABLE_UARTB
 	uart_ids |= UARTB;
 #endif
 #ifdef CONFIG_TEGRA_ENABLE_UARTC
 	uart_ids |= UARTC;
 #endif
 #ifdef CONFIG_TEGRA_ENABLE_UARTD
 	uart_ids |= UARTD;
 #endif
 #ifdef CONFIG_TEGRA_ENABLE_UARTE
 	uart_ids |= UARTE;
 #endif
 	setup_uarts(uart_ids);
 #endif
 }

 #if !CONFIG_IS_ENABLED(OF_CONTROL)
 static struct ns16550_plat ns16550_com1_pdata = {
 	.base = CFG_SYS_NS16550_COM1,
 	.reg_shift = 2,
 	.clock = CFG_SYS_NS16550_CLK,
 	.fcr = UART_FCR_DEFVAL,
 };

 U_BOOT_DRVINFO(ns16550_com1) = {
 	"ns16550_serial", &ns16550_com1_pdata
 };
 #endif

 #if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF) && !defined(CONFIG_ARM64)
 void enable_caches(void)
 {
 	/* Enable D-cache. I-cache is already enabled in start.S */
 	dcache_enable();
 }
 #endif
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* (C) Copyright 2010-2015
	* NVIDIA Corporation <www.nvidia.com>
	*/

	#include <common.h>
	#include <cpu_func.h>
	#include <dm.h>
	#include <init.h>
	#include <log.h>
	#include <ns16550.h>
	#include <spl.h>
	#include <asm/cache.h>
	#include <asm/global_data.h>
	#include <asm/io.h>
	#if IS_ENABLED(CONFIG_TEGRA_CLKRST)
	#include <asm/arch/clock.h>
	#endif
	#if CONFIG_IS_ENABLED(PINCTRL_TEGRA)
	#include <asm/arch/funcmux.h>
	#endif
	#if IS_ENABLED(CONFIG_TEGRA_MC)
	#include <asm/arch/mc.h>
	#endif
	#include <asm/arch/tegra.h>
	#include <asm/arch-tegra/ap.h>
	#include <asm/arch-tegra/board.h>
	#include <asm/arch-tegra/cboot.h>
	#include <asm/arch-tegra/pmc.h>
	#include <asm/arch-tegra/sys_proto.h>
	#include <asm/arch-tegra/warmboot.h>

	void save_boot_params_ret(void);

	DECLARE_GLOBAL_DATA_PTR;

	enum {
	/* UARTs which we can enable */
	UARTA = 1 << 0,
	UARTB = 1 << 1,
	UARTC = 1 << 2,
	UARTD = 1 << 3,
	UARTE = 1 << 4,
	UART_COUNT = 5,
	};

	static bool from_spl __section(".data");

	#ifndef CONFIG_SPL_BUILD
	void save_boot_params(unsigned long r0, unsigned long r1, unsigned long r2,
	unsigned long r3)
	{
	from_spl = r0 != UBOOT_NOT_LOADED_FROM_SPL;

	/*
	* The logic for this is somewhat indirect. The purpose of the marker
	* (UBOOT_NOT_LOADED_FROM_SPL) is in fact used to determine if U-Boot
	* was loaded from a read-only instance of itself, which is something
	* that can happen in secure boot setups. So basically the presence
	* of the marker is an indication that U-Boot was loaded by one such
	* special variant of U-Boot. Conversely, the absence of the marker
	* indicates that this instance of U-Boot was loaded by something
	* other than a special U-Boot. This could be SPL, but it could just
	* as well be one of any number of other first stage bootloaders.
	*/
	if (from_spl)
	cboot_save_boot_params(r0, r1, r2, r3);

	save_boot_params_ret();
	}
	#endif

	bool spl_was_boot_source(void)
	{
	return from_spl;
	}

	#if defined(CONFIG_TEGRA_SUPPORT_NON_SECURE)
	bool tegra_cpu_is_non_secure(void)
	{
	/*
	* This register reads 0xffffffff in non-secure mode. This register
	* only implements bits 31:20, so the lower bits will always read 0 in
	* secure mode. Thus, the lower bits are an indicator for secure vs.
	* non-secure mode.
	*/
	struct mc_ctlr mc = (struct mc_ctlr )NV_PA_MC_BASE;
	uint32_t mc_s_cfg0 = readl(&mc->mc_security_cfg0);
	return (mc_s_cfg0 & 1) == 1;
	}
	#endif

	#if IS_ENABLED(CONFIG_TEGRA_MC)
	/* Read the RAM size directly from the memory controller */
	static phys_size_t query_sdram_size(void)
	{
	struct mc_ctlr const mc = (struct mc_ctlr )NV_PA_MC_BASE;
	u32 emem_cfg;
	phys_size_t size_bytes;

	emem_cfg = readl(&mc->mc_emem_cfg);
	#if defined(CONFIG_TEGRA20)
	debug("mc->mc_emem_cfg (MEM_SIZE_KB) = 0x%08x\n", emem_cfg);
	size_bytes = get_ram_size((void )PHYS_SDRAM_1, emem_cfg 1024);
	#else
	debug("mc->mc_emem_cfg (MEM_SIZE_MB) = 0x%08x\n", emem_cfg);
	#ifndef CONFIG_PHYS_64BIT
	/*
	* If >=4GB RAM is present, the byte RAM size won't fit into 32-bits
	* and will wrap. Clip the reported size to the maximum that a 32-bit
	* variable can represent (rounded to a page).
	*/
	if (emem_cfg >= 4096) {
	size_bytes = U32_MAX & ~(0x1000 - 1);
	} else
	#endif
	{
	/* RAM size EMC is programmed to. */
	size_bytes = (phys_size_t)emem_cfg * 1024 * 1024;
	#ifndef CONFIG_ARM64
	/*
	* If all RAM fits within 32-bits, it can be accessed without
	* LPAE, so go test the RAM size. Otherwise, we can't access
	* all the RAM, and get_ram_size() would get confused, so
	* avoid using it. There's no reason we should need this
	* validation step anyway.
	*/
	if (emem_cfg <= (0 - PHYS_SDRAM_1) / (1024 * 1024))
	size_bytes = get_ram_size((void *)PHYS_SDRAM_1,
	size_bytes);
	#endif
	}
	#endif

	#if defined(CONFIG_TEGRA30) \|\| defined(CONFIG_TEGRA114)
	/* External memory limited to 2047 MB due to IROM/HI-VEC */
	if (size_bytes == SZ_2G)
	size_bytes -= SZ_1M;
	#endif

	return size_bytes;
	}
	#endif

	int dram_init(void)
	{
	int err;

	/* try to initialize DRAM from cboot DTB first */
	err = cboot_dram_init();
	if (err == 0)
	return 0;

	#if IS_ENABLED(CONFIG_TEGRA_MC)
	/* We do not initialise DRAM here. We just query the size */
	gd->ram_size = query_sdram_size();
	#endif

	return 0;
	}

	#if CONFIG_IS_ENABLED(PINCTRL_TEGRA)
	static int uart_configs[] = {
	#if defined(CONFIG_TEGRA20)
	#if defined(CONFIG_TEGRA_UARTA_UAA_UAB)
	FUNCMUX_UART1_UAA_UAB,
	#elif defined(CONFIG_TEGRA_UARTA_GPU)
	FUNCMUX_UART1_GPU,
	#elif defined(CONFIG_TEGRA_UARTA_SDIO1)
	FUNCMUX_UART1_SDIO1,
	#else
	FUNCMUX_UART1_IRRX_IRTX,
	#endif
	FUNCMUX_UART2_UAD,
	-1,
	FUNCMUX_UART4_GMC,
	-1,
	#elif defined(CONFIG_TEGRA30)
	FUNCMUX_UART1_ULPI, /* UARTA */
	-1,
	-1,
	-1,
	-1,
	#elif defined(CONFIG_TEGRA114)
	-1,
	-1,
	-1,
	FUNCMUX_UART4_GMI, /* UARTD */
	-1,
	#elif defined(CONFIG_TEGRA124)
	FUNCMUX_UART1_KBC, /* UARTA */
	-1,
	-1,
	FUNCMUX_UART4_GPIO, /* UARTD */
	-1,
	#else /* Tegra210 */
	FUNCMUX_UART1_UART1, /* UARTA */
	-1,
	-1,
	FUNCMUX_UART4_UART4, /* UARTD */
	-1,
	#endif
	};

	/**
	* Set up the specified uarts
	*
	* @param uarts_ids Mask containing UARTs to init (UARTx)
	*/
	static void setup_uarts(int uart_ids)
	{
	static enum periph_id id_for_uart[] = {
	PERIPH_ID_UART1,
	PERIPH_ID_UART2,
	PERIPH_ID_UART3,
	PERIPH_ID_UART4,
	PERIPH_ID_UART5,
	};
	size_t i;

	for (i = 0; i < UART_COUNT; i++) {
	if (uart_ids & (1 << i)) {
	enum periph_id id = id_for_uart[i];

	funcmux_select(id, uart_configs[i]);
	clock_ll_start_uart(id);
	}
	}
	}
	#endif

	void board_init_uart_f(void)
	{
	#if CONFIG_IS_ENABLED(PINCTRL_TEGRA)
	int uart_ids = 0; /* bit mask of which UART ids to enable */

	#ifdef CONFIG_TEGRA_ENABLE_UARTA
	uart_ids \|= UARTA;
	#endif
	#ifdef CONFIG_TEGRA_ENABLE_UARTB
	uart_ids \|= UARTB;
	#endif
	#ifdef CONFIG_TEGRA_ENABLE_UARTC
	uart_ids \|= UARTC;
	#endif
	#ifdef CONFIG_TEGRA_ENABLE_UARTD
	uart_ids \|= UARTD;
	#endif
	#ifdef CONFIG_TEGRA_ENABLE_UARTE
	uart_ids \|= UARTE;
	#endif
	setup_uarts(uart_ids);
	#endif
	}

	#if !CONFIG_IS_ENABLED(OF_CONTROL)
	static struct ns16550_plat ns16550_com1_pdata = {
	.base = CFG_SYS_NS16550_COM1,
	.reg_shift = 2,
	.clock = CFG_SYS_NS16550_CLK,
	.fcr = UART_FCR_DEFVAL,
	};

	U_BOOT_DRVINFO(ns16550_com1) = {
	"ns16550_serial", &ns16550_com1_pdata
	};
	#endif

	#if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF) && !defined(CONFIG_ARM64)
	void enable_caches(void)
	{
	/* Enable D-cache. I-cache is already enabled in start.S */
	dcache_enable();
	}
	#endif