u-boot-brain/arch/arm/cpu/tegra-common/board.c

/*
 *  (C) Copyright 2010-2014
 *  NVIDIA Corporation <www.nvidia.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/funcmux.h>
#include <asm/arch/tegra.h>
#include <asm/arch-tegra/board.h>
#include <asm/arch-tegra/pmc.h>
#include <asm/arch-tegra/sys_proto.h>
#include <asm/arch-tegra/warmboot.h>

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,
};

#if defined(CONFIG_TEGRA20) || defined(CONFIG_TEGRA30) || \
	defined(CONFIG_TEGRA114)
/*
 * Boot ROM initializes the odmdata in APBDEV_PMC_SCRATCH20_0,
 * so we are using this value to identify memory size.
 */
unsigned int query_sdram_size(void)
{
	struct pmc_ctlr *const pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
	u32 reg;

	reg = readl(&pmc->pmc_scratch20);
	debug("pmc->pmc_scratch20 (ODMData) = 0x%08x\n", reg);

#if defined(CONFIG_TEGRA20)
	/* bits 30:28 in OdmData are used for RAM size on T20  */
	reg &= 0x70000000;

	switch ((reg) >> 28) {
	case 1:
		return 0x10000000;	/* 256 MB */
	case 0:
	case 2:
	default:
		return 0x20000000;	/* 512 MB */
	case 3:
		return 0x40000000;	/* 1GB */
	}
#else	/* Tegra30/Tegra114 */
	/* bits 31:28 in OdmData are used for RAM size on T30  */
	switch ((reg) >> 28) {
	case 0:
	case 1:
	default:
		return 0x10000000;	/* 256 MB */
	case 2:
		return 0x20000000;	/* 512 MB */
	case 3:
		return 0x30000000;	/* 768 MB */
	case 4:
		return 0x40000000;	/* 1GB */
	case 8:
		return 0x7ff00000;	/* 2GB - 1MB */
	}
#endif
}
#else
#include <asm/arch/mc.h>

/* Read the RAM size directly from the memory controller */
unsigned int query_sdram_size(void)
{
	struct mc_ctlr *const mc = (struct mc_ctlr *)NV_PA_MC_BASE;
	u32 size_mb;

	size_mb = readl(&mc->mc_emem_cfg);
	debug("mc->mc_emem_cfg (MEM_SIZE_MB) = 0x%08x\n", size_mb);

	return size_mb * 1024 * 1024;
}
#endif

int dram_init(void)
{
	/* We do not initialise DRAM here. We just query the size */
	gd->ram_size = query_sdram_size();
	return 0;
}

#ifdef CONFIG_DISPLAY_BOARDINFO
int checkboard(void)
{
	printf("Board: %s\n", sysinfo.board_string);
	return 0;
}
#endif	/* CONFIG_DISPLAY_BOARDINFO */

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,
#else	/* Tegra124 */
	FUNCMUX_UART1_KBC,	/* UARTA */
	-1,
	-1,
	FUNCMUX_UART4_GPIO,	/* 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);
		}
	}
}

void board_init_uart_f(void)
{
	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);
}

#ifndef CONFIG_SYS_DCACHE_OFF
void enable_caches(void)
{
	/* Enable D-cache. I-cache is already enabled in start.S */
	dcache_enable();
}
#endif