board/freescale/mx6sxsabresd/mx6sxsabresd.c

/*
 * Copyright (C) 2014 Freescale Semiconductor, Inc.
 *
 * Author: Fabio Estevam <fabio.estevam@freescale.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <asm/arch/clock.h>
#include <asm/arch/iomux.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/mx6-pins.h>
#include <asm/arch/sys_proto.h>
#include <asm/gpio.h>
#include <asm/imx-common/iomux-v3.h>
#include <asm/io.h>
#include <asm/imx-common/mxc_i2c.h>
#include <linux/sizes.h>
#include <common.h>
#include <fsl_esdhc.h>
#include <mmc.h>
#include <i2c.h>
#include <power/pmic.h>
#include <power/pfuze100_pmic.h>

DECLARE_GLOBAL_DATA_PTR;

#define UART_PAD_CTRL  (PAD_CTL_PKE | PAD_CTL_PUE |		\
	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |		\
	PAD_CTL_DSE_40ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)

#define USDHC_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |		\
	PAD_CTL_PUS_22K_UP  | PAD_CTL_SPEED_LOW |		\
	PAD_CTL_DSE_80ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)

#define I2C_PAD_CTRL    (PAD_CTL_PKE | PAD_CTL_PUE |            \
	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |               \
	PAD_CTL_DSE_40ohm | PAD_CTL_HYS |			\
	PAD_CTL_ODE)

int dram_init(void)
{
	gd->ram_size = PHYS_SDRAM_SIZE;

	return 0;
}

static iomux_v3_cfg_t const uart1_pads[] = {
	MX6_PAD_GPIO1_IO04__UART1_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
	MX6_PAD_GPIO1_IO05__UART1_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
};

static iomux_v3_cfg_t const usdhc4_pads[] = {
	MX6_PAD_SD4_CLK__USDHC4_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD4_CMD__USDHC4_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD4_DATA0__USDHC4_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD4_DATA1__USDHC4_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD4_DATA2__USDHC4_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD4_DATA3__USDHC4_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD4_DATA7__GPIO6_IO_21 | MUX_PAD_CTRL(NO_PAD_CTRL),
};

static void setup_iomux_uart(void)
{
	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
}

#define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
/* I2C1 for PMIC */
struct i2c_pads_info i2c_pad_info1 = {
	.scl = {
		.i2c_mode = MX6_PAD_GPIO1_IO00__I2C1_SCL | PC,
		.gpio_mode = MX6_PAD_GPIO1_IO00__GPIO1_IO_0 | PC,
		.gp = IMX_GPIO_NR(1, 0),
	},
	.sda = {
		.i2c_mode = MX6_PAD_GPIO1_IO01__I2C1_SDA | PC,
		.gpio_mode = MX6_PAD_GPIO1_IO01__GPIO1_IO_1 | PC,
		.gp = IMX_GPIO_NR(1, 1),
	},
};

static int pfuze_init(void)
{
	struct pmic *p;
	int ret;
	unsigned int reg;

	ret = power_pfuze100_init(I2C_PMIC);
	if (ret)
		return ret;

	p = pmic_get("PFUZE100_PMIC");
	ret = pmic_probe(p);
	if (ret)
		return ret;

	pmic_reg_read(p, PFUZE100_DEVICEID, &reg);
	printf("PMIC:  PFUZE100 ID=0x%02x\n", reg);

	/* Set SW1AB standby voltage to 0.975V */
	pmic_reg_read(p, PFUZE100_SW1ABSTBY, &reg);
	reg &= ~0x3f;
	reg |= 0x1b;
	pmic_reg_write(p, PFUZE100_SW1ABSTBY, reg);

	/* Set SW1AB/VDDARM step ramp up time from 16us to 4us/25mV */
	pmic_reg_read(p, PUZE_100_SW1ABCONF, &reg);
	reg &= ~0xc0;
	reg |= 0x40;
	pmic_reg_write(p, PUZE_100_SW1ABCONF, reg);

	/* Set SW1C standby voltage to 0.975V */
	pmic_reg_read(p, PFUZE100_SW1CSTBY, &reg);
	reg &= ~0x3f;
	reg |= 0x1b;
	pmic_reg_write(p, PFUZE100_SW1CSTBY, reg);

	/* Set SW1C/VDDSOC step ramp up time from 16us to 4us/25mV */
	pmic_reg_read(p, PFUZE100_SW1CCONF, &reg);
	reg &= ~0xc0;
	reg |= 0x40;
	pmic_reg_write(p, PFUZE100_SW1CCONF, reg);

	/* Enable power of VGEN5 3V3, needed for SD3 */
	pmic_reg_read(p, PFUZE100_VGEN5VOL, &reg);
	reg &= ~0x1F;
	reg |= 0x1F;
	pmic_reg_write(p, PFUZE100_VGEN5VOL, reg);

	return 0;
}

int board_early_init_f(void)
{
	setup_iomux_uart();
	setup_i2c(1, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);

	return 0;
}

static struct fsl_esdhc_cfg usdhc_cfg[1] = {
	{USDHC4_BASE_ADDR},
};

int board_mmc_getcd(struct mmc *mmc)
{
	return 1;	/* Assume boot SD always present */
}

int board_mmc_init(bd_t *bis)
{
	imx_iomux_v3_setup_multiple_pads(usdhc4_pads, ARRAY_SIZE(usdhc4_pads));

	usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC4_CLK);
	return fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
}

int board_init(void)
{
	/* Address of boot parameters */
	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;

	return 0;
}

int board_late_init(void)
{
	pfuze_init();

	return 0;
}

int checkboard(void)
{
	puts("Board: MX6SX SABRE SDB\n");

	return 0;
}