arch/arm/cpu/armv7/am33xx/board.c

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

#include <common.h>
#include <errno.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/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 <i2c.h>
#include <miiphy.h>
#include <cpsw.h>
#include <asm/errno.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/musb.h>
#include <asm/omap_musb.h>

DECLARE_GLOBAL_DATA_PTR;

static const struct gpio_bank gpio_bank_am33xx[4] = {
	{ (void *)AM33XX_GPIO0_BASE, METHOD_GPIO_24XX },
	{ (void *)AM33XX_GPIO1_BASE, METHOD_GPIO_24XX },
	{ (void *)AM33XX_GPIO2_BASE, METHOD_GPIO_24XX },
	{ (void *)AM33XX_GPIO3_BASE, METHOD_GPIO_24XX },
};

const struct gpio_bank *const omap_gpio_bank = gpio_bank_am33xx;

#if defined(CONFIG_OMAP_HSMMC) && !defined(CONFIG_SPL_BUILD)
int cpu_mmc_init(bd_t *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

void setup_clocks_for_console(void)
{
	/* Not yet implemented */
	return;
}

/* AM33XX has two MUSB controllers which can be host or gadget */
#if (defined(CONFIG_MUSB_GADGET) || defined(CONFIG_MUSB_HOST)) && \
	(defined(CONFIG_AM335X_USB0) || defined(CONFIG_AM335X_USB1))
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);
	}
}

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

#ifdef CONFIG_AM335X_USB0
static void am33xx_otg0_set_phy_power(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(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
#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;
}

#ifdef CONFIG_SPL_BUILD
void rtc32k_enable(void)
{
	struct rtc_regs *rtc = (struct rtc_regs *)RTC_BASE;

	/*
	 * 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(0x83e70b13, &rtc->kick0r);
	writel(0x95a4f1e0, &rtc->kick1r);

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

#define UART_RESET		(0x1 << 1)
#define UART_CLK_RUNNING_MASK	0x1
#define UART_SMART_IDLE_EN	(0x1 << 0x3)

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);
}
#endif