arch/arm/mach-omap2/hwinit-common.c - u-boot - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /*
  *
  * Common functions for OMAP4/5 based boards
  *
  * (C) Copyright 2010
  * Texas Instruments, <www.ti.com>
  *
  * Author :
  *	Aneesh V	<aneesh@ti.com>
  *	Steve Sakoman	<steve@sakoman.com>
  */
 #include <common.h>
 #include <debug_uart.h>
 #include <fdtdec.h>
 #include <spl.h>
 #include <asm/arch/sys_proto.h>
 #include <linux/sizes.h>
 #include <asm/emif.h>
 #include <asm/omap_common.h>
 #include <linux/compiler.h>
 #include <asm/system.h>
 #include <dm/root.h>

 DECLARE_GLOBAL_DATA_PTR;

 void do_set_mux(u32 base, struct pad_conf_entry const *array, int size)
 {
 	int i;
 	struct pad_conf_entry *pad = (struct pad_conf_entry *) array;

 	for (i = 0; i < size; i++, pad++)
 		writew(pad->val, base + pad->offset);
 }

 static void set_mux_conf_regs(void)
 {
 	switch (omap_hw_init_context()) {
 	case OMAP_INIT_CONTEXT_SPL:
 		set_muxconf_regs();
 		break;
 	case OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL:
 		break;
 	case OMAP_INIT_CONTEXT_UBOOT_FROM_NOR:
 	case OMAP_INIT_CONTEXT_UBOOT_AFTER_CH:
 		set_muxconf_regs();
 		break;
 	}
 }

 u32 cortex_rev(void)
 {

 	unsigned int rev;

 	/* Read Main ID Register (MIDR) */
 	asm ("mrc p15, 0, %0, c0, c0, 0" : "=r" (rev));

 	return rev;
 }

 static void omap_rev_string(void)
 {
 	u32 omap_rev = omap_revision();
 	u32 soc_variant	= (omap_rev & 0xF0000000) >> 28;
 	u32 omap_variant = (omap_rev & 0xFFFF0000) >> 16;
 	u32 major_rev = (omap_rev & 0x00000F00) >> 8;
 	u32 minor_rev = (omap_rev & 0x000000F0) >> 4;

 	const char *sec_s, *package = NULL;

 	switch (get_device_type()) {
 	case TST_DEVICE:
 		sec_s = "TST";
 		break;
 	case EMU_DEVICE:
 		sec_s = "EMU";
 		break;
 	case HS_DEVICE:
 		sec_s = "HS";
 		break;
 	case GP_DEVICE:
 		sec_s = "GP";
 		break;
 	default:
 		sec_s = "?";
 	}

 #if defined(CONFIG_DRA7XX)
 	if (is_dra76x()) {
 		switch (omap_rev & 0xF) {
 		case DRA762_ABZ_PACKAGE:
 			package = "ABZ";
 			break;
 		case DRA762_ACD_PACKAGE:
 		default:
 			package = "ACD";
 			break;
 		}
 	}
 #endif

 	if (soc_variant)
 		printf("OMAP");
 	else
 		printf("DRA");
 	printf("%x-%s ES%x.%x", omap_variant, sec_s, major_rev, minor_rev);
 	if (package)
 		printf(" %s package\n", package);
 	else
 		puts("\n");
 }

 #ifdef CONFIG_SPL_BUILD
 void spl_display_print(void)
 {
 	omap_rev_string();
 }
 #endif

 void __weak srcomp_enable(void)
 {
 }

 /**
  * do_board_detect() - Detect board description
  *
  * Function to detect board description. This is expected to be
  * overridden in the SoC family board file where desired.
  */
 void __weak do_board_detect(void)
 {
 }

 /**
  * vcores_init() - Assign omap_vcores based on board
  *
  * Function to pick the vcores based on board. This is expected to be
  * overridden in the SoC family board file where desired.
  */
 void __weak vcores_init(void)
 {
 }

 void s_init(void)
 {
 }

 /**
  * init_package_revision() - Initialize package revision
  *
  * Function to get the pacakage information. This is expected to be
  * overridden in the SoC family file where desired.
  */
 void __weak init_package_revision(void)
 {
 }

 /**
  * early_system_init - Does Early system initialization.
  *
  * Does early system init of watchdog, muxing,  andclocks
  * Watchdog disable is done always. For the rest what gets done
  * depends on the boot mode in which this function is executed when
  *   1. SPL running from SRAM
  *   2. U-Boot running from FLASH
  *   3. U-Boot loaded to SDRAM by SPL
  *   4. U-Boot loaded to SDRAM by ROM code using the
  *	Configuration Header feature
  * Please have a look at the respective functions to see what gets
  * done in each of these cases
  * This function is called with SRAM stack.
  */
 void early_system_init(void)
 {
 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_MULTI_DTB_FIT)
 	int ret;
 	int rescan;
 #endif
 	init_omap_revision();
 	hw_data_init();
 	init_package_revision();

 #ifdef CONFIG_SPL_BUILD
 	if (warm_reset())
 		force_emif_self_refresh();
 #endif
 	watchdog_init();
 	set_mux_conf_regs();
 #ifdef CONFIG_SPL_BUILD
 	srcomp_enable();
 	do_io_settings();
 #endif
 	setup_early_clocks();

 #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();
 	spl_early_init();
 #endif
 	do_board_detect();

 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_MULTI_DTB_FIT)
 	/*
 	 * Board detection has been done.
 	 * Let us see if another dtb wouldn't be a better match
 	 * for our board
 	 */
 	ret = fdtdec_resetup(&rescan);
 	if (!ret && rescan) {
 		dm_uninit();
 		dm_init_and_scan(true);
 	}
 #endif

 	vcores_init();
 #ifdef CONFIG_DEBUG_UART_OMAP
 	debug_uart_init();
 #endif
 	prcm_init();
 }

 #ifdef CONFIG_SPL_BUILD
 void board_init_f(ulong dummy)
 {
 	early_system_init();
 #ifdef CONFIG_BOARD_EARLY_INIT_F
 	board_early_init_f();
 #endif
 	/* For regular u-boot sdram_init() is called from dram_init() */
 	sdram_init();
 	gd->ram_size = omap_sdram_size();
 }
 #endif

 int arch_cpu_init_dm(void)
 {
 	early_system_init();
 	return 0;
 }

 /*
  * Routine: wait_for_command_complete
  * Description: Wait for posting to finish on watchdog
  */
 void wait_for_command_complete(struct watchdog *wd_base)
 {
 	int pending = 1;
 	do {
 		pending = readl(&wd_base->wwps);
 	} while (pending);
 }

 /*
  * Routine: watchdog_init
  * Description: Shut down watch dogs
  */
 void watchdog_init(void)
 {
 	struct watchdog *wd2_base = (struct watchdog *)WDT2_BASE;

 	writel(WD_UNLOCK1, &wd2_base->wspr);
 	wait_for_command_complete(wd2_base);
 	writel(WD_UNLOCK2, &wd2_base->wspr);
 }


 /*
  * This function finds the SDRAM size available in the system
  * based on DMM section configurations
  * This is needed because the size of memory installed may be
  * different on different versions of the board
  */
 u32 omap_sdram_size(void)
 {
 	u32 section, i, valid;
 	u64 sdram_start = 0, sdram_end = 0, addr,
 	    size, total_size = 0, trap_size = 0, trap_start = 0;

 	for (i = 0; i < 4; i++) {
 		section	= __raw_readl(DMM_BASE + i*4);
 		valid = (section & EMIF_SDRC_ADDRSPC_MASK) >>
 			(EMIF_SDRC_ADDRSPC_SHIFT);
 		addr = section & EMIF_SYS_ADDR_MASK;

 		/* See if the address is valid */
 		if ((addr >= TI_ARMV7_DRAM_ADDR_SPACE_START) &&
 		    (addr < TI_ARMV7_DRAM_ADDR_SPACE_END)) {
 			size = ((section & EMIF_SYS_SIZE_MASK) >>
 				   EMIF_SYS_SIZE_SHIFT);
 			size = 1 << size;
 			size *= SZ_16M;

 			if (valid != DMM_SDRC_ADDR_SPC_INVALID) {
 				if (!sdram_start || (addr < sdram_start))
 					sdram_start = addr;
 				if (!sdram_end || ((addr + size) > sdram_end))
 					sdram_end = addr + size;
 			} else {
 				trap_size = size;
 				trap_start = addr;
 			}
 		}
 	}

 	if ((trap_start >= sdram_start) && (trap_start < sdram_end))
 		total_size = (sdram_end - sdram_start) - (trap_size);
 	else
 		total_size = sdram_end - sdram_start;

 	return total_size;
 }


 /*
  * Routine: dram_init
  * Description: sets uboots idea of sdram size
  */
 int dram_init(void)
 {
 	sdram_init();
 	gd->ram_size = omap_sdram_size();
 	return 0;
 }

 /*
  * Print board information
  */
 int checkboard(void)
 {
 	puts(sysinfo.board_string);
 	return 0;
 }

 #if defined(CONFIG_DISPLAY_CPUINFO)
 /*
  * Print CPU information
  */
 int print_cpuinfo(void)
 {
 	puts("CPU  : ");
 	omap_rev_string();

 	return 0;
 }
 #endif
	// SPDX-License-Identifier: GPL-2.0+
	/*
	*
	* Common functions for OMAP4/5 based boards
	*
	* (C) Copyright 2010
	* Texas Instruments, <www.ti.com>
	*
	* Author :
	* Aneesh V <aneesh@ti.com>
	* Steve Sakoman <steve@sakoman.com>
	*/
	#include <common.h>
	#include <debug_uart.h>
	#include <fdtdec.h>
	#include <spl.h>
	#include <asm/arch/sys_proto.h>
	#include <linux/sizes.h>
	#include <asm/emif.h>
	#include <asm/omap_common.h>
	#include <linux/compiler.h>
	#include <asm/system.h>
	#include <dm/root.h>

	DECLARE_GLOBAL_DATA_PTR;

	void do_set_mux(u32 base, struct pad_conf_entry const *array, int size)
	{
	int i;
	struct pad_conf_entry pad = (struct pad_conf_entry ) array;

	for (i = 0; i < size; i++, pad++)
	writew(pad->val, base + pad->offset);
	}

	static void set_mux_conf_regs(void)
	{
	switch (omap_hw_init_context()) {
	case OMAP_INIT_CONTEXT_SPL:
	set_muxconf_regs();
	break;
	case OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL:
	break;
	case OMAP_INIT_CONTEXT_UBOOT_FROM_NOR:
	case OMAP_INIT_CONTEXT_UBOOT_AFTER_CH:
	set_muxconf_regs();
	break;
	}
	}

	u32 cortex_rev(void)
	{

	unsigned int rev;

	/* Read Main ID Register (MIDR) */
	asm ("mrc p15, 0, %0, c0, c0, 0" : "=r" (rev));

	return rev;
	}

	static void omap_rev_string(void)
	{
	u32 omap_rev = omap_revision();
	u32 soc_variant = (omap_rev & 0xF0000000) >> 28;
	u32 omap_variant = (omap_rev & 0xFFFF0000) >> 16;
	u32 major_rev = (omap_rev & 0x00000F00) >> 8;
	u32 minor_rev = (omap_rev & 0x000000F0) >> 4;

	const char sec_s, package = NULL;

	switch (get_device_type()) {
	case TST_DEVICE:
	sec_s = "TST";
	break;
	case EMU_DEVICE:
	sec_s = "EMU";
	break;
	case HS_DEVICE:
	sec_s = "HS";
	break;
	case GP_DEVICE:
	sec_s = "GP";
	break;
	default:
	sec_s = "?";
	}

	#if defined(CONFIG_DRA7XX)
	if (is_dra76x()) {
	switch (omap_rev & 0xF) {
	case DRA762_ABZ_PACKAGE:
	package = "ABZ";
	break;
	case DRA762_ACD_PACKAGE:
	default:
	package = "ACD";
	break;
	}
	}
	#endif

	if (soc_variant)
	printf("OMAP");
	else
	printf("DRA");
	printf("%x-%s ES%x.%x", omap_variant, sec_s, major_rev, minor_rev);
	if (package)
	printf(" %s package\n", package);
	else
	puts("\n");
	}

	#ifdef CONFIG_SPL_BUILD
	void spl_display_print(void)
	{
	omap_rev_string();
	}
	#endif

	void __weak srcomp_enable(void)
	{
	}

	/**
	* do_board_detect() - Detect board description
	*
	* Function to detect board description. This is expected to be
	* overridden in the SoC family board file where desired.
	*/
	void __weak do_board_detect(void)
	{
	}

	/**
	* vcores_init() - Assign omap_vcores based on board
	*
	* Function to pick the vcores based on board. This is expected to be
	* overridden in the SoC family board file where desired.
	*/
	void __weak vcores_init(void)
	{
	}

	void s_init(void)
	{
	}

	/**
	* init_package_revision() - Initialize package revision
	*
	* Function to get the pacakage information. This is expected to be
	* overridden in the SoC family file where desired.
	*/
	void __weak init_package_revision(void)
	{
	}

	/**
	* early_system_init - Does Early system initialization.
	*
	* Does early system init of watchdog, muxing, andclocks
	* Watchdog disable is done always. For the rest what gets done
	* depends on the boot mode in which this function is executed when
	* 1. SPL running from SRAM
	* 2. U-Boot running from FLASH
	* 3. U-Boot loaded to SDRAM by SPL
	* 4. U-Boot loaded to SDRAM by ROM code using the
	* Configuration Header feature
	* Please have a look at the respective functions to see what gets
	* done in each of these cases
	* This function is called with SRAM stack.
	*/
	void early_system_init(void)
	{
	#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_MULTI_DTB_FIT)
	int ret;
	int rescan;
	#endif
	init_omap_revision();
	hw_data_init();
	init_package_revision();

	#ifdef CONFIG_SPL_BUILD
	if (warm_reset())
	force_emif_self_refresh();
	#endif
	watchdog_init();
	set_mux_conf_regs();
	#ifdef CONFIG_SPL_BUILD
	srcomp_enable();
	do_io_settings();
	#endif
	setup_early_clocks();

	#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();
	spl_early_init();
	#endif
	do_board_detect();

	#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_MULTI_DTB_FIT)
	/*
	* Board detection has been done.
	* Let us see if another dtb wouldn't be a better match
	* for our board
	*/
	ret = fdtdec_resetup(&rescan);
	if (!ret && rescan) {
	dm_uninit();
	dm_init_and_scan(true);
	}
	#endif

	vcores_init();
	#ifdef CONFIG_DEBUG_UART_OMAP
	debug_uart_init();
	#endif
	prcm_init();
	}

	#ifdef CONFIG_SPL_BUILD
	void board_init_f(ulong dummy)
	{
	early_system_init();
	#ifdef CONFIG_BOARD_EARLY_INIT_F
	board_early_init_f();
	#endif
	/* For regular u-boot sdram_init() is called from dram_init() */
	sdram_init();
	gd->ram_size = omap_sdram_size();
	}
	#endif

	int arch_cpu_init_dm(void)
	{
	early_system_init();
	return 0;
	}

	/*
	* Routine: wait_for_command_complete
	* Description: Wait for posting to finish on watchdog
	*/
	void wait_for_command_complete(struct watchdog *wd_base)
	{
	int pending = 1;
	do {
	pending = readl(&wd_base->wwps);
	} while (pending);
	}

	/*
	* Routine: watchdog_init
	* Description: Shut down watch dogs
	*/
	void watchdog_init(void)
	{
	struct watchdog wd2_base = (struct watchdog )WDT2_BASE;

	writel(WD_UNLOCK1, &wd2_base->wspr);
	wait_for_command_complete(wd2_base);
	writel(WD_UNLOCK2, &wd2_base->wspr);
	}


	/*
	* This function finds the SDRAM size available in the system
	* based on DMM section configurations
	* This is needed because the size of memory installed may be
	* different on different versions of the board
	*/
	u32 omap_sdram_size(void)
	{
	u32 section, i, valid;
	u64 sdram_start = 0, sdram_end = 0, addr,
	size, total_size = 0, trap_size = 0, trap_start = 0;

	for (i = 0; i < 4; i++) {
	section = __raw_readl(DMM_BASE + i*4);
	valid = (section & EMIF_SDRC_ADDRSPC_MASK) >>
	(EMIF_SDRC_ADDRSPC_SHIFT);
	addr = section & EMIF_SYS_ADDR_MASK;

	/* See if the address is valid */
	if ((addr >= TI_ARMV7_DRAM_ADDR_SPACE_START) &&
	(addr < TI_ARMV7_DRAM_ADDR_SPACE_END)) {
	size = ((section & EMIF_SYS_SIZE_MASK) >>
	EMIF_SYS_SIZE_SHIFT);
	size = 1 << size;
	size *= SZ_16M;

	if (valid != DMM_SDRC_ADDR_SPC_INVALID) {
	if (!sdram_start \|\| (addr < sdram_start))
	sdram_start = addr;
	if (!sdram_end \|\| ((addr + size) > sdram_end))
	sdram_end = addr + size;
	} else {
	trap_size = size;
	trap_start = addr;
	}
	}
	}

	if ((trap_start >= sdram_start) && (trap_start < sdram_end))
	total_size = (sdram_end - sdram_start) - (trap_size);
	else
	total_size = sdram_end - sdram_start;

	return total_size;
	}


	/*
	* Routine: dram_init
	* Description: sets uboots idea of sdram size
	*/
	int dram_init(void)
	{
	sdram_init();
	gd->ram_size = omap_sdram_size();
	return 0;
	}

	/*
	* Print board information
	*/
	int checkboard(void)
	{
	puts(sysinfo.board_string);
	return 0;
	}

	#if defined(CONFIG_DISPLAY_CPUINFO)
	/*
	* Print CPU information
	*/
	int print_cpuinfo(void)
	{
	puts("CPU : ");
	omap_rev_string();

	return 0;
	}
	#endif