evm.c

/*
 * (C) Copyright 2013
 * Texas Instruments Incorporated, <www.ti.com>
 *
 * Lokesh Vutla <lokeshvutla@ti.com>
 *
 * Based on previous work by:
 * Aneesh V       <aneesh@ti.com>
 * Steve Sakoman  <steve@sakoman.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */
#include <common.h>
#include <palmas.h>
#include <sata.h>
#include <asm/gpio.h>
#include <asm/arch/gpio.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/mmc_host_def.h>
#include <asm/arch/sata.h>
#include <environment.h>

#include "mux_data.h"

#ifdef CONFIG_DRIVER_TI_CPSW
#include <cpsw.h>
#endif

DECLARE_GLOBAL_DATA_PTR;

/* GPIO 7_11 */
#define GPIO_DDR_VTT_EN 203

const struct omap_sysinfo sysinfo = {
	"Board: DRA7xx\n"
};

/*
 * Adjust I/O delays on the Tx control and data lines of each MAC port. This
 * is a workaround in order to work properly with the DP83865 PHYs on the EVM.
 * In 3COM RGMII mode this PHY applies it's own internal clock delay, so we
 * essentially need to counteract the DRA7xx internal delay, and we do this
 * by delaying the control and data lines. If not using this PHY, you probably
 * don't need to do this stuff!
 */
static void dra7xx_adj_io_delay(const struct io_delay *io_dly)
{
	int i = 0;
	u32 reg_val;
	u32 delta;
	u32 coarse;
	u32 fine;

	writel(CFG_IO_DELAY_UNLOCK_KEY, CFG_IO_DELAY_LOCK);

	while(io_dly[i].addr) {
		writel(CFG_IO_DELAY_ACCESS_PATTERN & ~CFG_IO_DELAY_LOCK_MASK,
		       io_dly[i].addr);
		delta = io_dly[i].dly;
		reg_val = readl(io_dly[i].addr) & 0x3ff;
		coarse = ((reg_val >> 5) & 0x1F) + ((delta >> 5) & 0x1F);
		coarse = (coarse > 0x1F) ? (0x1F) : (coarse);
		fine = (reg_val & 0x1F) + (delta & 0x1F);
		fine = (fine > 0x1F) ? (0x1F) : (fine);
		reg_val = CFG_IO_DELAY_ACCESS_PATTERN |
				CFG_IO_DELAY_LOCK_MASK |
				((coarse << 5) | (fine));
		writel(reg_val, io_dly[i].addr);
		i++;
	}

	writel(CFG_IO_DELAY_LOCK_KEY, CFG_IO_DELAY_LOCK);
}

/**
 * @brief board_init
 *
 * @return 0
 */
int board_init(void)
{
	gpmc_init();
	gd->bd->bi_boot_params = (0x80000000 + 0x100); /* boot param addr */

	return 0;
}

int board_late_init(void)
{
#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
	if (omap_revision() == DRA722_ES1_0)
		setenv("board_name", "dra72x");
	else
		setenv("board_name", "dra7xx");
#endif
	return 0;
}

/**
 * @brief misc_init_r - Configure EVM board specific configurations
 * such as power configurations, ethernet initialization as phase2 of
 * boot sequence
 *
 * @return 0
 */
int misc_init_r(void)
{
	return 0;
}

static void do_set_mux32(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++)
		writel(pad->val, base + pad->offset);
}

void set_muxconf_regs_essential(void)
{
	do_set_mux32((*ctrl)->control_padconf_core_base,
		     core_padconf_array_essential,
		     sizeof(core_padconf_array_essential) /
		     sizeof(struct pad_conf_entry));
}

#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_GENERIC_MMC)
int board_mmc_init(bd_t *bis)
{
	omap_mmc_init(0, 0, 0, -1, -1);
	omap_mmc_init(1, 0, 0, -1, -1);
	return 0;
}
#endif

#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_OS_BOOT)
int spl_start_uboot(void)
{
	/* break into full u-boot on 'c' */
	if (serial_tstc() && serial_getc() == 'c')
		return 1;

#ifdef CONFIG_SPL_ENV_SUPPORT
	env_init();
	env_relocate_spec();
	if (getenv_yesno("boot_os") != 1)
		return 1;
#endif

	return 0;
}
#endif

#ifdef CONFIG_DRIVER_TI_CPSW

/* Delay value to add to calibrated value */
#define RGMII0_TXCTL_DLY_VAL		((0x3 << 5) + 0x8)
#define RGMII0_TXD0_DLY_VAL		((0x3 << 5) + 0x8)
#define RGMII0_TXD1_DLY_VAL		((0x3 << 5) + 0x2)
#define RGMII0_TXD2_DLY_VAL		((0x4 << 5) + 0x0)
#define RGMII0_TXD3_DLY_VAL		((0x4 << 5) + 0x0)
#define VIN2A_D13_DLY_VAL		((0x3 << 5) + 0x8)
#define VIN2A_D17_DLY_VAL		((0x3 << 5) + 0x8)
#define VIN2A_D16_DLY_VAL		((0x3 << 5) + 0x2)
#define VIN2A_D15_DLY_VAL		((0x4 << 5) + 0x0)
#define VIN2A_D14_DLY_VAL		((0x4 << 5) + 0x0)

extern u32 *const omap_si_rev;

static void cpsw_control(int enabled)
{
	/* VTP can be added here */

	return;
}

static struct cpsw_slave_data cpsw_slaves[] = {
	{
		.slave_reg_ofs	= 0x208,
		.sliver_reg_ofs	= 0xd80,
		.phy_addr	= 2,
	},
	{
		.slave_reg_ofs	= 0x308,
		.sliver_reg_ofs	= 0xdc0,
		.phy_addr	= 3,
	},
};

static struct cpsw_platform_data cpsw_data = {
	.mdio_base		= CPSW_MDIO_BASE,
	.cpsw_base		= CPSW_BASE,
	.mdio_div		= 0xff,
	.channels		= 8,
	.cpdma_reg_ofs		= 0x800,
	.slaves			= 2,
	.slave_data		= cpsw_slaves,
	.ale_reg_ofs		= 0xd00,
	.ale_entries		= 1024,
	.host_port_reg_ofs	= 0x108,
	.hw_stats_reg_ofs	= 0x900,
	.bd_ram_ofs		= 0x2000,
	.mac_control		= (1 << 5),
	.control		= cpsw_control,
	.host_port_num		= 0,
	.version		= CPSW_CTRL_VERSION_2,
};

int board_eth_init(bd_t *bis)
{
	int ret;
	uint8_t mac_addr[6];
	uint32_t mac_hi, mac_lo;
	uint32_t ctrl_val;
	const struct io_delay io_dly[] = {
		{CFG_RGMII0_TXCTL, RGMII0_TXCTL_DLY_VAL},
		{CFG_RGMII0_TXD0, RGMII0_TXD0_DLY_VAL},
		{CFG_RGMII0_TXD1, RGMII0_TXD1_DLY_VAL},
		{CFG_RGMII0_TXD2, RGMII0_TXD2_DLY_VAL},
		{CFG_RGMII0_TXD3, RGMII0_TXD3_DLY_VAL},
		{CFG_VIN2A_D13, VIN2A_D13_DLY_VAL},
		{CFG_VIN2A_D17, VIN2A_D17_DLY_VAL},
		{CFG_VIN2A_D16, VIN2A_D16_DLY_VAL},
		{CFG_VIN2A_D15, VIN2A_D15_DLY_VAL},
		{CFG_VIN2A_D14, VIN2A_D14_DLY_VAL},
		{0}
	};

	/* Adjust IO delay for RGMII tx path */
	dra7xx_adj_io_delay(io_dly);

	/* try reading mac address from efuse */
	mac_lo = readl((*ctrl)->control_core_mac_id_0_lo);
	mac_hi = readl((*ctrl)->control_core_mac_id_0_hi);
	mac_addr[0] = (mac_hi & 0xFF0000) >> 16;
	mac_addr[1] = (mac_hi & 0xFF00) >> 8;
	mac_addr[2] = mac_hi & 0xFF;
	mac_addr[3] = (mac_lo & 0xFF0000) >> 16;
	mac_addr[4] = (mac_lo & 0xFF00) >> 8;
	mac_addr[5] = mac_lo & 0xFF;

	if (!getenv("ethaddr")) {
		printf("<ethaddr> not set. Validating first E-fuse MAC\n");

		if (is_valid_ether_addr(mac_addr))
			eth_setenv_enetaddr("ethaddr", mac_addr);
	}

	mac_lo = readl((*ctrl)->control_core_mac_id_1_lo);
	mac_hi = readl((*ctrl)->control_core_mac_id_1_hi);
	mac_addr[0] = (mac_hi & 0xFF0000) >> 16;
	mac_addr[1] = (mac_hi & 0xFF00) >> 8;
	mac_addr[2] = mac_hi & 0xFF;
	mac_addr[3] = (mac_lo & 0xFF0000) >> 16;
	mac_addr[4] = (mac_lo & 0xFF00) >> 8;
	mac_addr[5] = mac_lo & 0xFF;

	if (!getenv("eth1addr")) {
		if (is_valid_ether_addr(mac_addr))
			eth_setenv_enetaddr("eth1addr", mac_addr);
	}

	ctrl_val = readl((*ctrl)->control_core_control_io1) & (~0x33);
	ctrl_val |= 0x22;
	writel(ctrl_val, (*ctrl)->control_core_control_io1);

	if (*omap_si_rev == DRA722_ES1_0)
		cpsw_data.active_slave = 1;

	ret = cpsw_register(&cpsw_data);
	if (ret < 0)
		printf("Error %d registering CPSW switch\n", ret);

	return ret;
}
#endif

#ifdef CONFIG_BOARD_EARLY_INIT_F
/* VTT regulator enable */
static inline void vtt_regulator_enable(void)
{
	if (omap_hw_init_context() == OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL)
		return;

	/* Do not enable VTT for DRA722 */
	if (omap_revision() == DRA722_ES1_0)
		return;

	/*
	 * EVM Rev G and later use gpio7_11 for DDR3 termination.
	 * This is safe enough to do on older revs.
	 */
	gpio_request(GPIO_DDR_VTT_EN, "ddr_vtt_en");
	gpio_direction_output(GPIO_DDR_VTT_EN, 1);
}

int board_early_init_f(void)
{
	vtt_regulator_enable();
	return 0;
}
#endif