u-boot-brain/arch/arm/mach-tegra/board2.c

/*
 *  (C) Copyright 2010,2011
 *  NVIDIA Corporation <www.nvidia.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <dm.h>
#include <errno.h>
#include <ns16550.h>
#include <linux/compiler.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#ifdef CONFIG_LCD
#include <asm/arch/display.h>
#endif
#include <asm/arch/funcmux.h>
#include <asm/arch/pinmux.h>
#include <asm/arch/pmu.h>
#ifdef CONFIG_PWM_TEGRA
#include <asm/arch/pwm.h>
#endif
#include <asm/arch/tegra.h>
#include <asm/arch-tegra/ap.h>
#include <asm/arch-tegra/board.h>
#include <asm/arch-tegra/clk_rst.h>
#include <asm/arch-tegra/pmc.h>
#include <asm/arch-tegra/sys_proto.h>
#include <asm/arch-tegra/uart.h>
#include <asm/arch-tegra/warmboot.h>
#include <asm/arch-tegra/gpu.h>
#ifdef CONFIG_TEGRA_CLOCK_SCALING
#include <asm/arch/emc.h>
#endif
#ifdef CONFIG_USB_EHCI_TEGRA
#include <asm/arch-tegra/usb.h>
#include <usb.h>
#endif
#ifdef CONFIG_TEGRA_MMC
#include <asm/arch-tegra/tegra_mmc.h>
#include <asm/arch-tegra/mmc.h>
#endif
#include <asm/arch-tegra/xusb-padctl.h>
#include <power/as3722.h>
#include <i2c.h>
#include <spi.h>
#include "emc.h"

DECLARE_GLOBAL_DATA_PTR;

#ifdef CONFIG_SPL_BUILD
/* TODO(sjg@chromium.org): Remove once SPL supports device tree */
U_BOOT_DEVICE(tegra_gpios) = {
	"gpio_tegra"
};
#endif

__weak void pinmux_init(void) {}
__weak void pin_mux_usb(void) {}
__weak void pin_mux_spi(void) {}
__weak void gpio_early_init_uart(void) {}
__weak void pin_mux_display(void) {}
__weak void start_cpu_fan(void) {}

#if defined(CONFIG_TEGRA_NAND)
__weak void pin_mux_nand(void)
{
	funcmux_select(PERIPH_ID_NDFLASH, FUNCMUX_DEFAULT);
}
#endif

/*
 * Routine: power_det_init
 * Description: turn off power detects
 */
static void power_det_init(void)
{
#if defined(CONFIG_TEGRA20)
	struct pmc_ctlr *const pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;

	/* turn off power detects */
	writel(0, &pmc->pmc_pwr_det_latch);
	writel(0, &pmc->pmc_pwr_det);
#endif
}

__weak int tegra_board_id(void)
{
	return -1;
}

#ifdef CONFIG_DISPLAY_BOARDINFO
int checkboard(void)
{
	int board_id = tegra_board_id();

	printf("Board: %s", CONFIG_TEGRA_BOARD_STRING);
	if (board_id != -1)
		printf(", ID: %d\n", board_id);
	printf("\n");

	return 0;
}
#endif	/* CONFIG_DISPLAY_BOARDINFO */

__weak int tegra_lcd_pmic_init(int board_it)
{
	return 0;
}

__weak int nvidia_board_init(void)
{
	return 0;
}

/*
 * Routine: board_init
 * Description: Early hardware init.
 */
int board_init(void)
{
	__maybe_unused int err;
	__maybe_unused int board_id;

	/* Do clocks and UART first so that printf() works */
	clock_init();
	clock_verify();

	config_gpu();

#ifdef CONFIG_TEGRA_SPI
	pin_mux_spi();
#endif

#ifdef CONFIG_PWM_TEGRA
	if (pwm_init(gd->fdt_blob))
		debug("%s: Failed to init pwm\n", __func__);
#endif
#ifdef CONFIG_LCD
	pin_mux_display();
	tegra_lcd_check_next_stage(gd->fdt_blob, 0);
#endif
	/* boot param addr */
	gd->bd->bi_boot_params = (NV_PA_SDRAM_BASE + 0x100);

	power_det_init();

#ifdef CONFIG_SYS_I2C_TEGRA
# ifdef CONFIG_TEGRA_PMU
	if (pmu_set_nominal())
		debug("Failed to select nominal voltages\n");
#  ifdef CONFIG_TEGRA_CLOCK_SCALING
	err = board_emc_init();
	if (err)
		debug("Memory controller init failed: %d\n", err);
#  endif
# endif /* CONFIG_TEGRA_PMU */
#ifdef CONFIG_AS3722_POWER
	err = as3722_init(NULL);
	if (err && err != -ENODEV)
		return err;
#endif
#endif /* CONFIG_SYS_I2C_TEGRA */

#ifdef CONFIG_USB_EHCI_TEGRA
	pin_mux_usb();
#endif

#ifdef CONFIG_LCD
	board_id = tegra_board_id();
	err = tegra_lcd_pmic_init(board_id);
	if (err)
		return err;
	tegra_lcd_check_next_stage(gd->fdt_blob, 0);
#endif

#ifdef CONFIG_TEGRA_NAND
	pin_mux_nand();
#endif

	tegra_xusb_padctl_init(gd->fdt_blob);

#ifdef CONFIG_TEGRA_LP0
	/* save Sdram params to PMC 2, 4, and 24 for WB0 */
	warmboot_save_sdram_params();

	/* prepare the WB code to LP0 location */
	warmboot_prepare_code(TEGRA_LP0_ADDR, TEGRA_LP0_SIZE);
#endif
	return nvidia_board_init();
}

#ifdef CONFIG_BOARD_EARLY_INIT_F
static void __gpio_early_init(void)
{
}

void gpio_early_init(void) __attribute__((weak, alias("__gpio_early_init")));

int board_early_init_f(void)
{
	/* Do any special system timer/TSC setup */
#if defined(CONFIG_TEGRA_SUPPORT_NON_SECURE)
	if (!tegra_cpu_is_non_secure())
#endif
		arch_timer_init();

	pinmux_init();
	board_init_uart_f();

	/* Initialize periph GPIOs */
	gpio_early_init();
	gpio_early_init_uart();
#ifdef CONFIG_LCD
	tegra_lcd_early_init(gd->fdt_blob);
#endif

	return 0;
}
#endif	/* EARLY_INIT */

int board_late_init(void)
{
#ifdef CONFIG_LCD
	/* Make sure we finish initing the LCD */
	tegra_lcd_check_next_stage(gd->fdt_blob, 1);
#endif
#if defined(CONFIG_TEGRA_SUPPORT_NON_SECURE)
	if (tegra_cpu_is_non_secure()) {
		printf("CPU is in NS mode\n");
		setenv("cpu_ns_mode", "1");
	} else {
		setenv("cpu_ns_mode", "");
	}
#endif
	start_cpu_fan();

	return 0;
}

#if defined(CONFIG_TEGRA_MMC)
__weak void pin_mux_mmc(void)
{
}

/* this is a weak define that we are overriding */
int board_mmc_init(bd_t *bd)
{
	debug("%s called\n", __func__);

	/* Enable muxes, etc. for SDMMC controllers */
	pin_mux_mmc();

	debug("%s: init MMC\n", __func__);
	tegra_mmc_init();

	return 0;
}

void pad_init_mmc(struct mmc_host *host)
{
#if defined(CONFIG_TEGRA30)
	enum periph_id id = host->mmc_id;
	u32 val;

	debug("%s: sdmmc address = %08x, id = %d\n", __func__,
		(unsigned int)host->reg, id);

	/* Set the pad drive strength for SDMMC1 or 3 only */
	if (id != PERIPH_ID_SDMMC1 && id != PERIPH_ID_SDMMC3) {
		debug("%s: settings are only valid for SDMMC1/SDMMC3!\n",
			__func__);
		return;
	}

	val = readl(&host->reg->sdmemcmppadctl);
	val &= 0xFFFFFFF0;
	val |= MEMCOMP_PADCTRL_VREF;
	writel(val, &host->reg->sdmemcmppadctl);

	val = readl(&host->reg->autocalcfg);
	val &= 0xFFFF0000;
	val |= AUTO_CAL_PU_OFFSET | AUTO_CAL_PD_OFFSET | AUTO_CAL_ENABLED;
	writel(val, &host->reg->autocalcfg);
#endif	/* T30 */
}
#endif	/* MMC */

#ifdef CONFIG_ARM64
/*
 * Most hardware on 64-bit Tegra is still restricted to DMA to the lower
 * 32-bits of the physical address space. Cap the maximum usable RAM area
 * at 4 GiB to avoid DMA buffers from being allocated beyond the 32-bit
 * boundary that most devices can address.
 *
 * Additionally, ARM64 devices typically run a secure monitor in EL3 and
 * U-Boot in EL2, and set up some secure RAM carve-outs to contain the EL3
 * code and data. These carve-outs are located at the top of 32-bit address
 * space. Restrict U-Boot's RAM usage to well below the location of those
 * carve-outs. Ideally, we would the secure monitor would inform U-Boot of
 * exactly which RAM it could use at run-time. However, I'm not sure how to
 * do that at present (and even if such a mechanism does exist, it would
 * likely not be generic across all forms of secure monitor).
 */
ulong board_get_usable_ram_top(ulong total_size)
{
	if (gd->ram_top > 0xe0000000)
		return 0xe0000000;

	return gd->ram_top;
}
#endif