board/samsung/smdk5250/smdk5250.c

/*
 * Copyright (C) 2012 Samsung Electronics
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <asm/io.h>
#include <i2c.h>
#include <netdev.h>
#include <asm/arch/cpu.h>
#include <asm/arch/gpio.h>
#include <asm/arch/dwmmc.h>
#include <asm/arch/pinmux.h>
#include <asm/arch/sromc.h>

#include "setup.h"

unsigned int OmPin;
DECLARE_GLOBAL_DATA_PTR;

#ifdef CONFIG_SMC911X
static int smc9115_pre_init(void)
{
	u32 smc_bw_conf, smc_bc_conf;
	int err;

	/* Ethernet needs data bus width of 16 bits */
	smc_bw_conf = SROMC_DATA16_WIDTH(CONFIG_ENV_SROM_BANK)
			| SROMC_BYTE_ENABLE(CONFIG_ENV_SROM_BANK);

	smc_bc_conf = SROMC_BC_TACS(0x01) | SROMC_BC_TCOS(0x01)
			| SROMC_BC_TACC(0x06) | SROMC_BC_TCOH(0x01)
			| SROMC_BC_TAH(0x0C)  | SROMC_BC_TACP(0x09)
			| SROMC_BC_PMC(0x01);

	/* Select and configure the SROMC bank */
	err = exynos_pinmux_config(PERIPH_ID_SROMC,
				CONFIG_ENV_SROM_BANK | PINMUX_FLAG_16BIT);
	if (err) {
		debug("SROMC not configured\n");
		return err;
	}

	s5p_config_sromc(CONFIG_ENV_SROM_BANK, smc_bw_conf, smc_bc_conf);
	return 0;
}
#endif

int board_init(void)
{
	gd->bd->bi_boot_params = (PHYS_SDRAM_1 + 0x100UL);

	OmPin = readl(EXYNOS5_POWER_BASE + INFORM3_OFFSET);

	printf("\nChecking Boot Mode ...");
	if (OmPin == BOOT_MMCSD) {
		printf(" SDMMC\n");
	} else if (OmPin == BOOT_EMMC_4_4) {
		printf(" EMMC4.41\n");
	} else {
		printf(" Please check OM_pin\n");
	}

	return 0;
}

int dram_init(void)
{
	gd->ram_size	= get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE)
			+ get_ram_size((long *)PHYS_SDRAM_2, PHYS_SDRAM_2_SIZE)
			+ get_ram_size((long *)PHYS_SDRAM_3, PHYS_SDRAM_3_SIZE)
			+ get_ram_size((long *)PHYS_SDRAM_4, PHYS_SDRAM_4_SIZE)
			+ get_ram_size((long *)PHYS_SDRAM_5, PHYS_SDRAM_7_SIZE)
			+ get_ram_size((long *)PHYS_SDRAM_6, PHYS_SDRAM_7_SIZE)
			+ get_ram_size((long *)PHYS_SDRAM_7, PHYS_SDRAM_7_SIZE)
			+ get_ram_size((long *)PHYS_SDRAM_8, PHYS_SDRAM_8_SIZE);
	return 0;
}

void dram_init_banksize(void)
{
	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
	gd->bd->bi_dram[0].size = get_ram_size((long *)PHYS_SDRAM_1,
							PHYS_SDRAM_1_SIZE);
	gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
	gd->bd->bi_dram[1].size = get_ram_size((long *)PHYS_SDRAM_2,
							PHYS_SDRAM_2_SIZE);
	gd->bd->bi_dram[2].start = PHYS_SDRAM_3;
	gd->bd->bi_dram[2].size = get_ram_size((long *)PHYS_SDRAM_3,
							PHYS_SDRAM_3_SIZE);
	gd->bd->bi_dram[3].start = PHYS_SDRAM_4;
	gd->bd->bi_dram[3].size = get_ram_size((long *)PHYS_SDRAM_4,
							PHYS_SDRAM_4_SIZE);
	gd->bd->bi_dram[4].start = PHYS_SDRAM_5;
	gd->bd->bi_dram[4].size = get_ram_size((long *)PHYS_SDRAM_5,
							PHYS_SDRAM_5_SIZE);
	gd->bd->bi_dram[5].start = PHYS_SDRAM_6;
	gd->bd->bi_dram[5].size = get_ram_size((long *)PHYS_SDRAM_6,
							PHYS_SDRAM_6_SIZE);
	gd->bd->bi_dram[6].start = PHYS_SDRAM_7;
	gd->bd->bi_dram[6].size = get_ram_size((long *)PHYS_SDRAM_7,
							PHYS_SDRAM_7_SIZE);
	gd->bd->bi_dram[7].start = PHYS_SDRAM_8;
	gd->bd->bi_dram[7].size = get_ram_size((long *)PHYS_SDRAM_8,
							PHYS_SDRAM_8_SIZE);
}

int board_eth_init(bd_t *bis)
{
#ifdef CONFIG_SMC911X
	if (smc9115_pre_init())
		return -1;
	return smc911x_initialize(0, CONFIG_SMC911X_BASE);
#endif
	return 0;
}

#ifdef CONFIG_DISPLAY_BOARDINFO
int checkboard(void)
{
	printf("\nBoard: %s\n",CONFIG_IDENT_STRING);

	return 0;
}
#endif

#ifdef CONFIG_GENERIC_MMC
int board_mmc_init(bd_t *bis)
{
	int err;

	err = exynos_pinmux_config(PERIPH_ID_SDMMC0, PINMUX_FLAG_8BIT_MODE);
	if (err) {
		debug("SDMMC0 not configured\n");
		return err;
	}

	err = exynos_pinmux_config(PERIPH_ID_SDMMC2, PINMUX_FLAG_NONE);
	if (err) {
		debug("SDMMC2 not configured\n");
		return err;
	}
	
	if (OmPin == BOOT_EMMC_4_4) {
		err = exynos_dwmmc_init(0, 8);
		err = exynos_dwmmc_init(2, 4);
	} else {
		err = exynos_dwmmc_init(2, 4);
		err = exynos_dwmmc_init(0, 8);
	}

	err = exynos_dwmmc_init(0, 8);

	return err;
}
#endif

static int board_uart_init(void)
{
	int err;

	err = exynos_pinmux_config(PERIPH_ID_UART0, PINMUX_FLAG_NONE);
	if (err) {
		debug("UART0 not configured\n");
		return err;
	}

	err = exynos_pinmux_config(PERIPH_ID_UART1, PINMUX_FLAG_NONE);
	if (err) {
		debug("UART1 not configured\n");
		return err;
	}

	err = exynos_pinmux_config(PERIPH_ID_UART2, PINMUX_FLAG_NONE);
	if (err) {
		debug("UART2 not configured\n");
		return err;
	}

	err = exynos_pinmux_config(PERIPH_ID_UART3, PINMUX_FLAG_NONE);
	if (err) {
		debug("UART3 not configured\n");
		return err;
	}

	return 0;
}

#ifdef CONFIG_SYS_I2C_INIT_BOARD
static int board_i2c_init(void)
{
	int i, err;

	for (i = 0; i < CONFIG_MAX_I2C_NUM; i++) {
		err = exynos_pinmux_config((PERIPH_ID_I2C0 + i),
						PINMUX_FLAG_NONE);
		if (err) {
			debug("I2C%d not configured\n", (PERIPH_ID_I2C0 + i));
			return err;
		}
	}
	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
	return 0;
}
#endif

#ifdef CONFIG_BOARD_LATE_INIT
int board_late_init(void)
{
	int i;
	uchar mac[6];
	unsigned int guid_high = readl(EXYNOS5_GUID_HIGH);
	unsigned int guid_low = readl(EXYNOS5_GUID_LOW);

	for (i = 0; i < 2; i++)
		mac[i] = (guid_high >> (8 * (1 - i))) & 0xFF;

	for (i = 0; i < 4; i++)
		mac[i+2] = (guid_low >> (8 * (3 - i))) & 0xFF;

	/* mark it as not multicast and outside official 80211 MAC namespace */
	mac[0] = (mac[0] & ~0x1) | 0x2;

	eth_setenv_enetaddr("ethaddr", mac);
	eth_setenv_enetaddr("usbethaddr", mac);

#ifdef CONFIG_PREBOOT
	setenv("preboot", CONFIG_PREBOOT);
#endif
}
#endif

#ifdef CONFIG_BOARD_EARLY_INIT_F
int board_early_init_f(void)
{
	int err;
	err = board_uart_init();
	if (err) {
		debug("UART init failed\n");
		return err;
	}
#ifdef CONFIG_SYS_I2C_INIT_BOARD
	err = board_i2c_init();
#endif
	return err;
}
#endif

void arch_preboot_os(void)
{
	/*
	 * We should now long be done with accessing any peripherals or
	 * setting up any other hardware state that needs to be set up from
	 * the secure mode (TrustZone), so we can switch to non-secure mode
	 * and we rely on board-specific logic to put a board-specific monitor
	 * in place for stuff like L2 cache maintenance and power management.
	 */
	enter_ns();

	/*
	 * Enter Hyp mode immediately before booting the kernel to allow
	 * the first Linux kernel access to and control of Hyp mode so that
	 * modules like KVM can run VMs.
	 *
	 * Without further ado...
	 */
	enter_hyp();
}