arch/arm/mach-omap2/am33xx/board.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * board.c
  *
  * Common board functions for AM33XX based boards
  *
  * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
  */

 #include <common.h>
 #include <dm.h>
 #include <debug_uart.h>
 #include <errno.h>
 #include <init.h>
 #include <net.h>
 #include <ns16550.h>
 #include <omap3_spi.h>
 #include <spl.h>
 #include <asm/arch/cpu.h>
 #include <asm/arch/hardware.h>
 #include <asm/arch/omap.h>
 #include <asm/arch/ddr_defs.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/i2c.h>
 #include <asm/arch/mem.h>
 #include <asm/arch/mmc_host_def.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/io.h>
 #include <asm/emif.h>
 #include <asm/gpio.h>
 #include <asm/omap_common.h>
 #include <i2c.h>
 #include <miiphy.h>
 #include <cpsw.h>
 #include <linux/delay.h>
 #include <linux/errno.h>
 #include <linux/compiler.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
 #include <linux/usb/musb.h>
 #include <asm/omap_musb.h>
 #include <asm/davinci_rtc.h>

 #define AM43XX_EMIF_BASE				0x4C000000
 #define AM43XX_SDRAM_CONFIG_OFFSET			0x8
 #define AM43XX_SDRAM_TYPE_MASK				0xE0000000
 #define AM43XX_SDRAM_TYPE_SHIFT				29
 #define AM43XX_SDRAM_TYPE_DDR3				3
 #define AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET		0xDC
 #define AM43XX_RDWRLVLFULL_START			0x80000000

 /* SPI flash. */
 #if CONFIG_IS_ENABLED(DM_SPI) && !CONFIG_IS_ENABLED(OF_CONTROL)
 #define AM33XX_SPI0_BASE	0x48030000
 #define AM33XX_SPI0_OFFSET	(AM33XX_SPI0_BASE + OMAP4_MCSPI_REG_OFFSET)
 #endif

 DECLARE_GLOBAL_DATA_PTR;

 int dram_init(void)
 {
 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
 	sdram_init();
 #endif

 	/* dram_init must store complete ramsize in gd->ram_size */
 	gd->ram_size = get_ram_size(
 			(void *)CONFIG_SYS_SDRAM_BASE,
 			CONFIG_MAX_RAM_BANK_SIZE);
 	return 0;
 }

 int dram_init_banksize(void)
 {
 	gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
 	gd->bd->bi_dram[0].size = gd->ram_size;

 	return 0;
 }

 #if !CONFIG_IS_ENABLED(OF_CONTROL)
 static const struct ns16550_platdata am33xx_serial[] = {
 	{ .base = CONFIG_SYS_NS16550_COM1, .reg_shift = 2,
 	  .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
 # ifdef CONFIG_SYS_NS16550_COM2
 	{ .base = CONFIG_SYS_NS16550_COM2, .reg_shift = 2,
 	  .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
 #  ifdef CONFIG_SYS_NS16550_COM3
 	{ .base = CONFIG_SYS_NS16550_COM3, .reg_shift = 2,
 	  .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
 	{ .base = CONFIG_SYS_NS16550_COM4, .reg_shift = 2,
 	  .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
 	{ .base = CONFIG_SYS_NS16550_COM5, .reg_shift = 2,
 	  .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
 	{ .base = CONFIG_SYS_NS16550_COM6, .reg_shift = 2,
 	  .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
 #  endif
 # endif
 };

 U_BOOT_DEVICES(am33xx_uarts) = {
 	{ "ns16550_serial", &am33xx_serial[0] },
 #  ifdef CONFIG_SYS_NS16550_COM2
 	{ "ns16550_serial", &am33xx_serial[1] },
 #   ifdef CONFIG_SYS_NS16550_COM3
 	{ "ns16550_serial", &am33xx_serial[2] },
 	{ "ns16550_serial", &am33xx_serial[3] },
 	{ "ns16550_serial", &am33xx_serial[4] },
 	{ "ns16550_serial", &am33xx_serial[5] },
 #   endif
 #  endif
 };

 #ifdef CONFIG_DM_I2C
 static const struct omap_i2c_platdata am33xx_i2c[] = {
 	{ I2C_BASE1, 100000, OMAP_I2C_REV_V2},
 	{ I2C_BASE2, 100000, OMAP_I2C_REV_V2},
 	{ I2C_BASE3, 100000, OMAP_I2C_REV_V2},
 };

 U_BOOT_DEVICES(am33xx_i2c) = {
 	{ "i2c_omap", &am33xx_i2c[0] },
 	{ "i2c_omap", &am33xx_i2c[1] },
 	{ "i2c_omap", &am33xx_i2c[2] },
 };
 #endif

 #if CONFIG_IS_ENABLED(DM_GPIO)
 static const struct omap_gpio_platdata am33xx_gpio[] = {
 	{ 0, AM33XX_GPIO0_BASE },
 	{ 1, AM33XX_GPIO1_BASE },
 	{ 2, AM33XX_GPIO2_BASE },
 	{ 3, AM33XX_GPIO3_BASE },
 #ifdef CONFIG_AM43XX
 	{ 4, AM33XX_GPIO4_BASE },
 	{ 5, AM33XX_GPIO5_BASE },
 #endif
 };

 U_BOOT_DEVICES(am33xx_gpios) = {
 	{ "gpio_omap", &am33xx_gpio[0] },
 	{ "gpio_omap", &am33xx_gpio[1] },
 	{ "gpio_omap", &am33xx_gpio[2] },
 	{ "gpio_omap", &am33xx_gpio[3] },
 #ifdef CONFIG_AM43XX
 	{ "gpio_omap", &am33xx_gpio[4] },
 	{ "gpio_omap", &am33xx_gpio[5] },
 #endif
 };
 #endif
 #if CONFIG_IS_ENABLED(DM_SPI) && !CONFIG_IS_ENABLED(OF_CONTROL)
 static const struct omap3_spi_plat omap3_spi_pdata = {
 	.regs = (struct mcspi *)AM33XX_SPI0_OFFSET,
 	.pin_dir = MCSPI_PINDIR_D0_IN_D1_OUT,
 };

 U_BOOT_DEVICE(am33xx_spi) = {
 	.name = "omap3_spi",
 	.platdata = &omap3_spi_pdata,
 };
 #endif
 #endif

 #if !CONFIG_IS_ENABLED(DM_GPIO)
 static const struct gpio_bank gpio_bank_am33xx[] = {
 	{ (void *)AM33XX_GPIO0_BASE },
 	{ (void *)AM33XX_GPIO1_BASE },
 	{ (void *)AM33XX_GPIO2_BASE },
 	{ (void *)AM33XX_GPIO3_BASE },
 #ifdef CONFIG_AM43XX
 	{ (void *)AM33XX_GPIO4_BASE },
 	{ (void *)AM33XX_GPIO5_BASE },
 #endif
 };

 const struct gpio_bank *const omap_gpio_bank = gpio_bank_am33xx;
 #endif

 #if defined(CONFIG_MMC_OMAP_HS)
 int cpu_mmc_init(struct bd_info *bis)
 {
 	int ret;

 	ret = omap_mmc_init(0, 0, 0, -1, -1);
 	if (ret)
 		return ret;

 	return omap_mmc_init(1, 0, 0, -1, -1);
 }
 #endif

 /*
  * RTC only with DDR in self-refresh mode magic value, checked against during
  * boot to see if we have a valid config. This should be in sync with the value
  * that will be in drivers/soc/ti/pm33xx.c.
  */
 #define RTC_MAGIC_VAL		0x8cd0

 /* Board type field bit shift for RTC only with DDR in self-refresh mode */
 #define RTC_BOARD_TYPE_SHIFT	16

 /* AM33XX has two MUSB controllers which can be host or gadget */
 #if (defined(CONFIG_USB_MUSB_GADGET) || defined(CONFIG_USB_MUSB_HOST)) && \
 	(defined(CONFIG_AM335X_USB0) || defined(CONFIG_AM335X_USB1)) && \
 	(!CONFIG_IS_ENABLED(DM_USB) || !CONFIG_IS_ENABLED(OF_CONTROL)) && \
 	(!defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_MUSB_NEW_SUPPORT))

 static struct musb_hdrc_config musb_config = {
 	.multipoint     = 1,
 	.dyn_fifo       = 1,
 	.num_eps        = 16,
 	.ram_bits       = 12,
 };

 #if CONFIG_IS_ENABLED(DM_USB) && !CONFIG_IS_ENABLED(OF_CONTROL)
 static struct ti_musb_platdata usb0 = {
 	.base = (void *)USB0_OTG_BASE,
 	.ctrl_mod_base = &((struct ctrl_dev *)CTRL_DEVICE_BASE)->usb_ctrl0,
 	.plat = {
 		.config         = &musb_config,
 		.power          = 50,
 		.platform_ops	= &musb_dsps_ops,
 		},
 };

 static struct ti_musb_platdata usb1 = {
 	.base = (void *)USB1_OTG_BASE,
 	.ctrl_mod_base = &((struct ctrl_dev *)CTRL_DEVICE_BASE)->usb_ctrl1,
 	.plat = {
 		.config         = &musb_config,
 		.power          = 50,
 		.platform_ops	= &musb_dsps_ops,
 		},
 };

 U_BOOT_DEVICES(am33xx_usbs) = {
 #if CONFIG_AM335X_USB0_MODE == MUSB_PERIPHERAL
 	{ "ti-musb-peripheral", &usb0 },
 #elif CONFIG_AM335X_USB0_MODE == MUSB_HOST
 	{ "ti-musb-host", &usb0 },
 #endif
 #if CONFIG_AM335X_USB1_MODE == MUSB_PERIPHERAL
 	{ "ti-musb-peripheral", &usb1 },
 #elif CONFIG_AM335X_USB1_MODE == MUSB_HOST
 	{ "ti-musb-host", &usb1 },
 #endif
 };

 int arch_misc_init(void)
 {
 	return 0;
 }
 #else
 static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;

 /* USB 2.0 PHY Control */
 #define CM_PHY_PWRDN			(1 << 0)
 #define CM_PHY_OTG_PWRDN		(1 << 1)
 #define OTGVDET_EN			(1 << 19)
 #define OTGSESSENDEN			(1 << 20)

 static void am33xx_usb_set_phy_power(u8 on, u32 *reg_addr)
 {
 	if (on) {
 		clrsetbits_le32(reg_addr, CM_PHY_PWRDN | CM_PHY_OTG_PWRDN,
 				OTGVDET_EN | OTGSESSENDEN);
 	} else {
 		clrsetbits_le32(reg_addr, 0, CM_PHY_PWRDN | CM_PHY_OTG_PWRDN);
 	}
 }

 #ifdef CONFIG_AM335X_USB0
 static void am33xx_otg0_set_phy_power(struct udevice *dev, u8 on)
 {
 	am33xx_usb_set_phy_power(on, &cdev->usb_ctrl0);
 }

 struct omap_musb_board_data otg0_board_data = {
 	.set_phy_power = am33xx_otg0_set_phy_power,
 };

 static struct musb_hdrc_platform_data otg0_plat = {
 	.mode           = CONFIG_AM335X_USB0_MODE,
 	.config         = &musb_config,
 	.power          = 50,
 	.platform_ops	= &musb_dsps_ops,
 	.board_data	= &otg0_board_data,
 };
 #endif

 #ifdef CONFIG_AM335X_USB1
 static void am33xx_otg1_set_phy_power(struct udevice *dev, u8 on)
 {
 	am33xx_usb_set_phy_power(on, &cdev->usb_ctrl1);
 }

 struct omap_musb_board_data otg1_board_data = {
 	.set_phy_power = am33xx_otg1_set_phy_power,
 };

 static struct musb_hdrc_platform_data otg1_plat = {
 	.mode           = CONFIG_AM335X_USB1_MODE,
 	.config         = &musb_config,
 	.power          = 50,
 	.platform_ops	= &musb_dsps_ops,
 	.board_data	= &otg1_board_data,
 };
 #endif

 int arch_misc_init(void)
 {
 #ifdef CONFIG_AM335X_USB0
 	musb_register(&otg0_plat, &otg0_board_data,
 		(void *)USB0_OTG_BASE);
 #endif
 #ifdef CONFIG_AM335X_USB1
 	musb_register(&otg1_plat, &otg1_board_data,
 		(void *)USB1_OTG_BASE);
 #endif
 	return 0;
 }
 #endif

 #else	/* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */

 int arch_misc_init(void)
 {
 	struct udevice *dev;
 	int ret;

 	ret = uclass_first_device(UCLASS_MISC, &dev);
 	if (ret || !dev)
 		return ret;

 #if defined(CONFIG_DM_ETH) && defined(CONFIG_USB_ETHER)
 	ret = usb_ether_init();
 	if (ret) {
 		pr_err("USB ether init failed\n");
 		return ret;
 	}
 #endif

 	return 0;
 }

 #endif /* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */

 #ifndef CONFIG_SKIP_LOWLEVEL_INIT

 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC) || \
 	(defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT))
 static void rtc32k_unlock(struct davinci_rtc *rtc)
 {
 	/*
 	 * Unlock the RTC's registers.  For more details please see the
 	 * RTC_SS section of the TRM.  In order to unlock we need to
 	 * write these specific values (keys) in this order.
 	 */
 	writel(RTC_KICK0R_WE, &rtc->kick0r);
 	writel(RTC_KICK1R_WE, &rtc->kick1r);
 }
 #endif

 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
 /*
  * Write contents of the RTC_SCRATCH1 register based on board type
  * Two things are passed
  * on. First 16 bits (0:15) are written with RTC_MAGIC value. Once the
  * control gets to kernel, kernel reads the scratchpad register and gets to
  * know that bootloader has rtc_only support.
  *
  * Second important thing is the board type  (16:31). This is needed in the
  * rtc_only boot where in we want to avoid costly i2c reads to eeprom to
  * identify the board type and we go ahead and copy the board strings to
  * am43xx_board_name.
  */
 void update_rtc_magic(void)
 {
 	struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
 	u32 magic = RTC_MAGIC_VAL;

 	magic |= (rtc_only_get_board_type() << RTC_BOARD_TYPE_SHIFT);

 	rtc32k_unlock(rtc);

 	/* write magic */
 	writel(magic, &rtc->scratch1);
 }
 #endif

 /*
  * In the case of non-SPL based booting we'll want to call these
  * functions a tiny bit later as it will require gd to be set and cleared
  * and that's not true in s_init in this case so we cannot do it there.
  */
 int board_early_init_f(void)
 {
 	set_mux_conf_regs();
 	prcm_init();
 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
 	update_rtc_magic();
 #endif
 	return 0;
 }

 /*
  * This function is the place to do per-board things such as ramp up the
  * MPU clock frequency.
  */
 __weak void am33xx_spl_board_init(void)
 {
 }

 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
 static void rtc32k_enable(void)
 {
 	struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;

 	rtc32k_unlock(rtc);

 	/* Enable the RTC 32K OSC by setting bits 3 and 6. */
 	writel((1 << 3) | (1 << 6), &rtc->osc);
 }
 #endif

 static void uart_soft_reset(void)
 {
 	struct uart_sys *uart_base = (struct uart_sys *)DEFAULT_UART_BASE;
 	u32 regval;

 	regval = readl(&uart_base->uartsyscfg);
 	regval |= UART_RESET;
 	writel(regval, &uart_base->uartsyscfg);
 	while ((readl(&uart_base->uartsyssts) &
 		UART_CLK_RUNNING_MASK) != UART_CLK_RUNNING_MASK)
 		;

 	/* Disable smart idle */
 	regval = readl(&uart_base->uartsyscfg);
 	regval |= UART_SMART_IDLE_EN;
 	writel(regval, &uart_base->uartsyscfg);
 }

 static void watchdog_disable(void)
 {
 	struct wd_timer *wdtimer = (struct wd_timer *)WDT_BASE;

 	writel(0xAAAA, &wdtimer->wdtwspr);
 	while (readl(&wdtimer->wdtwwps) != 0x0)
 		;
 	writel(0x5555, &wdtimer->wdtwspr);
 	while (readl(&wdtimer->wdtwwps) != 0x0)
 		;
 }

 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
 /*
  * Check if we are executing rtc-only + DDR mode, and resume from it if needed
  */
 static void rtc_only(void)
 {
 	struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
 	struct prm_device_inst *prm_device =
 				(struct prm_device_inst *)PRM_DEVICE_INST;

 	u32 scratch1, sdrc;
 	void (*resume_func)(void);

 	scratch1 = readl(&rtc->scratch1);

 	/*
 	 * Check RTC scratch against RTC_MAGIC_VAL, RTC_MAGIC_VAL is only
 	 * written to this register when we want to wake up from RTC only
 	 * with DDR in self-refresh mode. Contents of the RTC_SCRATCH1:
 	 * bits 0-15:  RTC_MAGIC_VAL
 	 * bits 16-31: board type (needed for sdram_init)
 	 */
 	if ((scratch1 & 0xffff) != RTC_MAGIC_VAL)
 		return;

 	rtc32k_unlock(rtc);

 	/* Clear RTC magic */
 	writel(0, &rtc->scratch1);

 	/*
 	 * Update board type based on value stored on RTC_SCRATCH1, this
 	 * is done so that we don't need to read the board type from eeprom
 	 * over i2c bus which is expensive
 	 */
 	rtc_only_update_board_type(scratch1 >> RTC_BOARD_TYPE_SHIFT);

 	/*
 	 * Enable EMIF_DEVOFF in PRCM_PRM_EMIF_CTRL to indicate to EMIF we
 	 * are resuming from self-refresh. This avoids an unnecessary re-init
 	 * of the DDR. The re-init takes time and we would need to wait for
 	 * it to complete before accessing DDR to avoid L3 NOC errors.
 	 */
 	writel(EMIF_CTRL_DEVOFF, &prm_device->emif_ctrl);

 	rtc_only_prcm_init();
 	sdram_init();

 	/* Check EMIF4D_SDRAM_CONFIG[31:29] SDRAM_TYPE */
 	/* Only perform leveling if SDRAM_TYPE = 3 (DDR3) */
 	sdrc = readl(AM43XX_EMIF_BASE + AM43XX_SDRAM_CONFIG_OFFSET);

 	sdrc &= AM43XX_SDRAM_TYPE_MASK;
 	sdrc >>= AM43XX_SDRAM_TYPE_SHIFT;

 	if (sdrc == AM43XX_SDRAM_TYPE_DDR3) {
 		writel(AM43XX_RDWRLVLFULL_START,
 		       AM43XX_EMIF_BASE +
 		       AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET);
 		mdelay(1);

 am43xx_wait:
 		sdrc = readl(AM43XX_EMIF_BASE +
 			     AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET);
 		if (sdrc == AM43XX_RDWRLVLFULL_START)
 			goto am43xx_wait;
 	}

 	resume_func = (void *)readl(&rtc->scratch0);
 	if (resume_func)
 		resume_func();
 }
 #endif

 void s_init(void)
 {
 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
 	rtc_only();
 #endif
 }

 void early_system_init(void)
 {
 	/*
 	 * The ROM will only have set up sufficient pinmux to allow for the
 	 * first 4KiB NOR to be read, we must finish doing what we know of
 	 * the NOR mux in this space in order to continue.
 	 */
 #ifdef CONFIG_NOR_BOOT
 	enable_norboot_pin_mux();
 #endif
 	watchdog_disable();
 	set_uart_mux_conf();
 	setup_early_clocks();
 	uart_soft_reset();
 #ifdef CONFIG_SPL_BUILD
 	/*
 	 * Save the boot parameters passed from romcode.
 	 * We cannot delay the saving further than this,
 	 * to prevent overwrites.
 	 */
 	save_omap_boot_params();
 #endif
 #ifdef CONFIG_DEBUG_UART_OMAP
 	debug_uart_init();
 #endif

 #ifdef CONFIG_SPL_BUILD
 	spl_early_init();
 #endif

 #ifdef CONFIG_TI_I2C_BOARD_DETECT
 	do_board_detect();
 #endif

 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
 	/* Enable RTC32K clock */
 	rtc32k_enable();
 #endif
 }

 #ifdef CONFIG_SPL_BUILD
 void board_init_f(ulong dummy)
 {
 	hw_data_init();
 	early_system_init();
 	board_early_init_f();
 	sdram_init();
 	/* dram_init must store complete ramsize in gd->ram_size */
 	gd->ram_size = get_ram_size(
 			(void *)CONFIG_SYS_SDRAM_BASE,
 			CONFIG_MAX_RAM_BANK_SIZE);
 }
 #endif

 #endif

 int arch_cpu_init_dm(void)
 {
 	hw_data_init();
 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
 	early_system_init();
 #endif
 	return 0;
 }
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* board.c
	*
	* Common board functions for AM33XX based boards
	*
	* Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
	*/

	#include <common.h>
	#include <dm.h>
	#include <debug_uart.h>
	#include <errno.h>
	#include <init.h>
	#include <net.h>
	#include <ns16550.h>
	#include <omap3_spi.h>
	#include <spl.h>
	#include <asm/arch/cpu.h>
	#include <asm/arch/hardware.h>
	#include <asm/arch/omap.h>
	#include <asm/arch/ddr_defs.h>
	#include <asm/arch/clock.h>
	#include <asm/arch/gpio.h>
	#include <asm/arch/i2c.h>
	#include <asm/arch/mem.h>
	#include <asm/arch/mmc_host_def.h>
	#include <asm/arch/sys_proto.h>
	#include <asm/io.h>
	#include <asm/emif.h>
	#include <asm/gpio.h>
	#include <asm/omap_common.h>
	#include <i2c.h>
	#include <miiphy.h>
	#include <cpsw.h>
	#include <linux/delay.h>
	#include <linux/errno.h>
	#include <linux/compiler.h>
	#include <linux/usb/ch9.h>
	#include <linux/usb/gadget.h>
	#include <linux/usb/musb.h>
	#include <asm/omap_musb.h>
	#include <asm/davinci_rtc.h>

	#define AM43XX_EMIF_BASE 0x4C000000
	#define AM43XX_SDRAM_CONFIG_OFFSET 0x8
	#define AM43XX_SDRAM_TYPE_MASK 0xE0000000
	#define AM43XX_SDRAM_TYPE_SHIFT 29
	#define AM43XX_SDRAM_TYPE_DDR3 3
	#define AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET 0xDC
	#define AM43XX_RDWRLVLFULL_START 0x80000000

	/* SPI flash. */
	#if CONFIG_IS_ENABLED(DM_SPI) && !CONFIG_IS_ENABLED(OF_CONTROL)
	#define AM33XX_SPI0_BASE 0x48030000
	#define AM33XX_SPI0_OFFSET (AM33XX_SPI0_BASE + OMAP4_MCSPI_REG_OFFSET)
	#endif

	DECLARE_GLOBAL_DATA_PTR;

	int dram_init(void)
	{
	#ifndef CONFIG_SKIP_LOWLEVEL_INIT
	sdram_init();
	#endif

	/* dram_init must store complete ramsize in gd->ram_size */
	gd->ram_size = get_ram_size(
	(void *)CONFIG_SYS_SDRAM_BASE,
	CONFIG_MAX_RAM_BANK_SIZE);
	return 0;
	}

	int dram_init_banksize(void)
	{
	gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
	gd->bd->bi_dram[0].size = gd->ram_size;

	return 0;
	}

	#if !CONFIG_IS_ENABLED(OF_CONTROL)
	static const struct ns16550_platdata am33xx_serial[] = {
	{ .base = CONFIG_SYS_NS16550_COM1, .reg_shift = 2,
	.clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
	# ifdef CONFIG_SYS_NS16550_COM2
	{ .base = CONFIG_SYS_NS16550_COM2, .reg_shift = 2,
	.clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
	# ifdef CONFIG_SYS_NS16550_COM3
	{ .base = CONFIG_SYS_NS16550_COM3, .reg_shift = 2,
	.clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
	{ .base = CONFIG_SYS_NS16550_COM4, .reg_shift = 2,
	.clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
	{ .base = CONFIG_SYS_NS16550_COM5, .reg_shift = 2,
	.clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
	{ .base = CONFIG_SYS_NS16550_COM6, .reg_shift = 2,
	.clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
	# endif
	# endif
	};

	U_BOOT_DEVICES(am33xx_uarts) = {
	{ "ns16550_serial", &am33xx_serial[0] },
	# ifdef CONFIG_SYS_NS16550_COM2
	{ "ns16550_serial", &am33xx_serial[1] },
	# ifdef CONFIG_SYS_NS16550_COM3
	{ "ns16550_serial", &am33xx_serial[2] },
	{ "ns16550_serial", &am33xx_serial[3] },
	{ "ns16550_serial", &am33xx_serial[4] },
	{ "ns16550_serial", &am33xx_serial[5] },
	# endif
	# endif
	};

	#ifdef CONFIG_DM_I2C
	static const struct omap_i2c_platdata am33xx_i2c[] = {
	{ I2C_BASE1, 100000, OMAP_I2C_REV_V2},
	{ I2C_BASE2, 100000, OMAP_I2C_REV_V2},
	{ I2C_BASE3, 100000, OMAP_I2C_REV_V2},
	};

	U_BOOT_DEVICES(am33xx_i2c) = {
	{ "i2c_omap", &am33xx_i2c[0] },
	{ "i2c_omap", &am33xx_i2c[1] },
	{ "i2c_omap", &am33xx_i2c[2] },
	};
	#endif

	#if CONFIG_IS_ENABLED(DM_GPIO)
	static const struct omap_gpio_platdata am33xx_gpio[] = {
	{ 0, AM33XX_GPIO0_BASE },
	{ 1, AM33XX_GPIO1_BASE },
	{ 2, AM33XX_GPIO2_BASE },
	{ 3, AM33XX_GPIO3_BASE },
	#ifdef CONFIG_AM43XX
	{ 4, AM33XX_GPIO4_BASE },
	{ 5, AM33XX_GPIO5_BASE },
	#endif
	};

	U_BOOT_DEVICES(am33xx_gpios) = {
	{ "gpio_omap", &am33xx_gpio[0] },
	{ "gpio_omap", &am33xx_gpio[1] },
	{ "gpio_omap", &am33xx_gpio[2] },
	{ "gpio_omap", &am33xx_gpio[3] },
	#ifdef CONFIG_AM43XX
	{ "gpio_omap", &am33xx_gpio[4] },
	{ "gpio_omap", &am33xx_gpio[5] },
	#endif
	};
	#endif
	#if CONFIG_IS_ENABLED(DM_SPI) && !CONFIG_IS_ENABLED(OF_CONTROL)
	static const struct omap3_spi_plat omap3_spi_pdata = {
	.regs = (struct mcspi *)AM33XX_SPI0_OFFSET,
	.pin_dir = MCSPI_PINDIR_D0_IN_D1_OUT,
	};

	U_BOOT_DEVICE(am33xx_spi) = {
	.name = "omap3_spi",
	.platdata = &omap3_spi_pdata,
	};
	#endif
	#endif

	#if !CONFIG_IS_ENABLED(DM_GPIO)
	static const struct gpio_bank gpio_bank_am33xx[] = {
	{ (void *)AM33XX_GPIO0_BASE },
	{ (void *)AM33XX_GPIO1_BASE },
	{ (void *)AM33XX_GPIO2_BASE },
	{ (void *)AM33XX_GPIO3_BASE },
	#ifdef CONFIG_AM43XX
	{ (void *)AM33XX_GPIO4_BASE },
	{ (void *)AM33XX_GPIO5_BASE },
	#endif
	};

	const struct gpio_bank *const omap_gpio_bank = gpio_bank_am33xx;
	#endif

	#if defined(CONFIG_MMC_OMAP_HS)
	int cpu_mmc_init(struct bd_info *bis)
	{
	int ret;

	ret = omap_mmc_init(0, 0, 0, -1, -1);
	if (ret)
	return ret;

	return omap_mmc_init(1, 0, 0, -1, -1);
	}
	#endif

	/*
	* RTC only with DDR in self-refresh mode magic value, checked against during
	* boot to see if we have a valid config. This should be in sync with the value
	* that will be in drivers/soc/ti/pm33xx.c.
	*/
	#define RTC_MAGIC_VAL 0x8cd0

	/* Board type field bit shift for RTC only with DDR in self-refresh mode */
	#define RTC_BOARD_TYPE_SHIFT 16

	/* AM33XX has two MUSB controllers which can be host or gadget */
	#if (defined(CONFIG_USB_MUSB_GADGET) \|\| defined(CONFIG_USB_MUSB_HOST)) && \
	(defined(CONFIG_AM335X_USB0) \|\| defined(CONFIG_AM335X_USB1)) && \
	(!CONFIG_IS_ENABLED(DM_USB) \|\| !CONFIG_IS_ENABLED(OF_CONTROL)) && \
	(!defined(CONFIG_SPL_BUILD) \|\| defined(CONFIG_SPL_MUSB_NEW_SUPPORT))

	static struct musb_hdrc_config musb_config = {
	.multipoint = 1,
	.dyn_fifo = 1,
	.num_eps = 16,
	.ram_bits = 12,
	};

	#if CONFIG_IS_ENABLED(DM_USB) && !CONFIG_IS_ENABLED(OF_CONTROL)
	static struct ti_musb_platdata usb0 = {
	.base = (void *)USB0_OTG_BASE,
	.ctrl_mod_base = &((struct ctrl_dev *)CTRL_DEVICE_BASE)->usb_ctrl0,
	.plat = {
	.config = &musb_config,
	.power = 50,
	.platform_ops = &musb_dsps_ops,
	},
	};

	static struct ti_musb_platdata usb1 = {
	.base = (void *)USB1_OTG_BASE,
	.ctrl_mod_base = &((struct ctrl_dev *)CTRL_DEVICE_BASE)->usb_ctrl1,
	.plat = {
	.config = &musb_config,
	.power = 50,
	.platform_ops = &musb_dsps_ops,
	},
	};

	U_BOOT_DEVICES(am33xx_usbs) = {
	#if CONFIG_AM335X_USB0_MODE == MUSB_PERIPHERAL
	{ "ti-musb-peripheral", &usb0 },
	#elif CONFIG_AM335X_USB0_MODE == MUSB_HOST
	{ "ti-musb-host", &usb0 },
	#endif
	#if CONFIG_AM335X_USB1_MODE == MUSB_PERIPHERAL
	{ "ti-musb-peripheral", &usb1 },
	#elif CONFIG_AM335X_USB1_MODE == MUSB_HOST
	{ "ti-musb-host", &usb1 },
	#endif
	};

	int arch_misc_init(void)
	{
	return 0;
	}
	#else
	static struct ctrl_dev cdev = (struct ctrl_dev )CTRL_DEVICE_BASE;

	/* USB 2.0 PHY Control */
	#define CM_PHY_PWRDN (1 << 0)
	#define CM_PHY_OTG_PWRDN (1 << 1)
	#define OTGVDET_EN (1 << 19)
	#define OTGSESSENDEN (1 << 20)

	static void am33xx_usb_set_phy_power(u8 on, u32 *reg_addr)
	{
	if (on) {
	clrsetbits_le32(reg_addr, CM_PHY_PWRDN \| CM_PHY_OTG_PWRDN,
	OTGVDET_EN \| OTGSESSENDEN);
	} else {
	clrsetbits_le32(reg_addr, 0, CM_PHY_PWRDN \| CM_PHY_OTG_PWRDN);
	}
	}

	#ifdef CONFIG_AM335X_USB0
	static void am33xx_otg0_set_phy_power(struct udevice *dev, u8 on)
	{
	am33xx_usb_set_phy_power(on, &cdev->usb_ctrl0);
	}

	struct omap_musb_board_data otg0_board_data = {
	.set_phy_power = am33xx_otg0_set_phy_power,
	};

	static struct musb_hdrc_platform_data otg0_plat = {
	.mode = CONFIG_AM335X_USB0_MODE,
	.config = &musb_config,
	.power = 50,
	.platform_ops = &musb_dsps_ops,
	.board_data = &otg0_board_data,
	};
	#endif

	#ifdef CONFIG_AM335X_USB1
	static void am33xx_otg1_set_phy_power(struct udevice *dev, u8 on)
	{
	am33xx_usb_set_phy_power(on, &cdev->usb_ctrl1);
	}

	struct omap_musb_board_data otg1_board_data = {
	.set_phy_power = am33xx_otg1_set_phy_power,
	};

	static struct musb_hdrc_platform_data otg1_plat = {
	.mode = CONFIG_AM335X_USB1_MODE,
	.config = &musb_config,
	.power = 50,
	.platform_ops = &musb_dsps_ops,
	.board_data = &otg1_board_data,
	};
	#endif

	int arch_misc_init(void)
	{
	#ifdef CONFIG_AM335X_USB0
	musb_register(&otg0_plat, &otg0_board_data,
	(void *)USB0_OTG_BASE);
	#endif
	#ifdef CONFIG_AM335X_USB1
	musb_register(&otg1_plat, &otg1_board_data,
	(void *)USB1_OTG_BASE);
	#endif
	return 0;
	}
	#endif

	#else /* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */

	int arch_misc_init(void)
	{
	struct udevice *dev;
	int ret;

	ret = uclass_first_device(UCLASS_MISC, &dev);
	if (ret \|\| !dev)
	return ret;

	#if defined(CONFIG_DM_ETH) && defined(CONFIG_USB_ETHER)
	ret = usb_ether_init();
	if (ret) {
	pr_err("USB ether init failed\n");
	return ret;
	}
	#endif

	return 0;
	}

	#endif /* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */

	#ifndef CONFIG_SKIP_LOWLEVEL_INIT

	#if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC) \|\| \
	(defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT))
	static void rtc32k_unlock(struct davinci_rtc *rtc)
	{
	/*
	* Unlock the RTC's registers. For more details please see the
	* RTC_SS section of the TRM. In order to unlock we need to
	* write these specific values (keys) in this order.
	*/
	writel(RTC_KICK0R_WE, &rtc->kick0r);
	writel(RTC_KICK1R_WE, &rtc->kick1r);
	}
	#endif

	#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
	/*
	* Write contents of the RTC_SCRATCH1 register based on board type
	* Two things are passed
	* on. First 16 bits (0:15) are written with RTC_MAGIC value. Once the
	* control gets to kernel, kernel reads the scratchpad register and gets to
	* know that bootloader has rtc_only support.
	*
	* Second important thing is the board type (16:31). This is needed in the
	* rtc_only boot where in we want to avoid costly i2c reads to eeprom to
	* identify the board type and we go ahead and copy the board strings to
	* am43xx_board_name.
	*/
	void update_rtc_magic(void)
	{
	struct davinci_rtc rtc = (struct davinci_rtc )RTC_BASE;
	u32 magic = RTC_MAGIC_VAL;

	magic \|= (rtc_only_get_board_type() << RTC_BOARD_TYPE_SHIFT);

	rtc32k_unlock(rtc);

	/* write magic */
	writel(magic, &rtc->scratch1);
	}
	#endif

	/*
	* In the case of non-SPL based booting we'll want to call these
	* functions a tiny bit later as it will require gd to be set and cleared
	* and that's not true in s_init in this case so we cannot do it there.
	*/
	int board_early_init_f(void)
	{
	set_mux_conf_regs();
	prcm_init();
	#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
	update_rtc_magic();
	#endif
	return 0;
	}

	/*
	* This function is the place to do per-board things such as ramp up the
	* MPU clock frequency.
	*/
	__weak void am33xx_spl_board_init(void)
	{
	}

	#if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
	static void rtc32k_enable(void)
	{
	struct davinci_rtc rtc = (struct davinci_rtc )RTC_BASE;

	rtc32k_unlock(rtc);

	/* Enable the RTC 32K OSC by setting bits 3 and 6. */
	writel((1 << 3) \| (1 << 6), &rtc->osc);
	}
	#endif

	static void uart_soft_reset(void)
	{
	struct uart_sys uart_base = (struct uart_sys )DEFAULT_UART_BASE;
	u32 regval;

	regval = readl(&uart_base->uartsyscfg);
	regval \|= UART_RESET;
	writel(regval, &uart_base->uartsyscfg);
	while ((readl(&uart_base->uartsyssts) &
	UART_CLK_RUNNING_MASK) != UART_CLK_RUNNING_MASK)
	;

	/* Disable smart idle */
	regval = readl(&uart_base->uartsyscfg);
	regval \|= UART_SMART_IDLE_EN;
	writel(regval, &uart_base->uartsyscfg);
	}

	static void watchdog_disable(void)
	{
	struct wd_timer wdtimer = (struct wd_timer )WDT_BASE;

	writel(0xAAAA, &wdtimer->wdtwspr);
	while (readl(&wdtimer->wdtwwps) != 0x0)
	;
	writel(0x5555, &wdtimer->wdtwspr);
	while (readl(&wdtimer->wdtwwps) != 0x0)
	;
	}

	#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
	/*
	* Check if we are executing rtc-only + DDR mode, and resume from it if needed
	*/
	static void rtc_only(void)
	{
	struct davinci_rtc rtc = (struct davinci_rtc )RTC_BASE;
	struct prm_device_inst *prm_device =
	(struct prm_device_inst *)PRM_DEVICE_INST;

	u32 scratch1, sdrc;
	void (*resume_func)(void);

	scratch1 = readl(&rtc->scratch1);

	/*
	* Check RTC scratch against RTC_MAGIC_VAL, RTC_MAGIC_VAL is only
	* written to this register when we want to wake up from RTC only
	* with DDR in self-refresh mode. Contents of the RTC_SCRATCH1:
	* bits 0-15: RTC_MAGIC_VAL
	* bits 16-31: board type (needed for sdram_init)
	*/
	if ((scratch1 & 0xffff) != RTC_MAGIC_VAL)
	return;

	rtc32k_unlock(rtc);

	/* Clear RTC magic */
	writel(0, &rtc->scratch1);

	/*
	* Update board type based on value stored on RTC_SCRATCH1, this
	* is done so that we don't need to read the board type from eeprom
	* over i2c bus which is expensive
	*/
	rtc_only_update_board_type(scratch1 >> RTC_BOARD_TYPE_SHIFT);

	/*
	* Enable EMIF_DEVOFF in PRCM_PRM_EMIF_CTRL to indicate to EMIF we
	* are resuming from self-refresh. This avoids an unnecessary re-init
	* of the DDR. The re-init takes time and we would need to wait for
	* it to complete before accessing DDR to avoid L3 NOC errors.
	*/
	writel(EMIF_CTRL_DEVOFF, &prm_device->emif_ctrl);

	rtc_only_prcm_init();
	sdram_init();

	/* Check EMIF4D_SDRAM_CONFIG[31:29] SDRAM_TYPE */
	/* Only perform leveling if SDRAM_TYPE = 3 (DDR3) */
	sdrc = readl(AM43XX_EMIF_BASE + AM43XX_SDRAM_CONFIG_OFFSET);

	sdrc &= AM43XX_SDRAM_TYPE_MASK;
	sdrc >>= AM43XX_SDRAM_TYPE_SHIFT;

	if (sdrc == AM43XX_SDRAM_TYPE_DDR3) {
	writel(AM43XX_RDWRLVLFULL_START,
	AM43XX_EMIF_BASE +
	AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET);
	mdelay(1);

	am43xx_wait:
	sdrc = readl(AM43XX_EMIF_BASE +
	AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET);
	if (sdrc == AM43XX_RDWRLVLFULL_START)
	goto am43xx_wait;
	}

	resume_func = (void *)readl(&rtc->scratch0);
	if (resume_func)
	resume_func();
	}
	#endif

	void s_init(void)
	{
	#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
	rtc_only();
	#endif
	}

	void early_system_init(void)
	{
	/*
	* The ROM will only have set up sufficient pinmux to allow for the
	* first 4KiB NOR to be read, we must finish doing what we know of
	* the NOR mux in this space in order to continue.
	*/
	#ifdef CONFIG_NOR_BOOT
	enable_norboot_pin_mux();
	#endif
	watchdog_disable();
	set_uart_mux_conf();
	setup_early_clocks();
	uart_soft_reset();
	#ifdef CONFIG_SPL_BUILD
	/*
	* Save the boot parameters passed from romcode.
	* We cannot delay the saving further than this,
	* to prevent overwrites.
	*/
	save_omap_boot_params();
	#endif
	#ifdef CONFIG_DEBUG_UART_OMAP
	debug_uart_init();
	#endif

	#ifdef CONFIG_SPL_BUILD
	spl_early_init();
	#endif

	#ifdef CONFIG_TI_I2C_BOARD_DETECT
	do_board_detect();
	#endif

	#if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
	/* Enable RTC32K clock */
	rtc32k_enable();
	#endif
	}

	#ifdef CONFIG_SPL_BUILD
	void board_init_f(ulong dummy)
	{
	hw_data_init();
	early_system_init();
	board_early_init_f();
	sdram_init();
	/* dram_init must store complete ramsize in gd->ram_size */
	gd->ram_size = get_ram_size(
	(void *)CONFIG_SYS_SDRAM_BASE,
	CONFIG_MAX_RAM_BANK_SIZE);
	}
	#endif

	#endif

	int arch_cpu_init_dm(void)
	{
	hw_data_init();
	#ifndef CONFIG_SKIP_LOWLEVEL_INIT
	early_system_init();
	#endif
	return 0;
	}