/*
 * (C) Copyright 2008
 * Texas Instruments, <www.ti.com>
 * Raghavendra KH <r-khandenahally@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.
 *
 * 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
 */

/**
 * @file
 * @brief Beagle Specific Board Initialization routines
 */

/**
 * @page ti_beagle Texas Instruments Beagle Board
 *
 * FileName: arch/arm/boards/omap/board-beagle.c
 *
 * Beagle Board from Texas Instruments as described here:
 * http://www.beagleboard.org
 *
 * This board is based on OMAP3530.
 * More on OMAP3530 (including documentation can be found here):
 * http://focus.ti.com/docs/prod/folders/print/omap3530.html
 *
 * This file provides initialization in two stages:
 * @li boot time initialization - do basics required to get SDRAM working.
 * This is run from SRAM - so no case constructs and global vars can be used.
 * @li run time initialization - this is for the rest of the initializations
 * such as flash, uart etc.
 *
 * Boot time initialization includes:
 * @li SDRAM initialization.
 * @li Pin Muxing relevant for Beagle.
 *
 * Run time initialization includes
 * @li serial @ref serial_ns16550.c driver device definition
 *
 * Originally from arch/arm/boards/omap/board-sdp343x.c
 */

#include <common.h>
#include <console.h>
#include <init.h>
#include <driver.h>
#include <sizes.h>
#include <io.h>
#include <ns16550.h>
#include <asm/armlinux.h>
#include <generated/mach-types.h>
#include <mach/silicon.h>
#include <mach/sdrc.h>
#include <mach/sys_info.h>
#include <mach/syslib.h>
#include <mach/control.h>
#include <mach/omap3-mux.h>
#include <mach/gpmc.h>
#include <mach/gpmc_nand.h>
#include <mach/ehci.h>
#include <i2c/i2c.h>
#include <linux/err.h>
#include <usb/ehci.h>
#include <mach/xload.h>
#include "board.h"

/******************** Board Boot Time *******************/

/**
 * @brief Do the SDRC initialization for 128Meg Micron DDR for CS0
 *
 * @return void
 */
static void sdrc_init(void)
{
	/* SDRAM software reset */
	/* No idle ack and RESET enable */
	writel(0x1A, SDRC_REG(SYSCONFIG));
	sdelay(100);
	/* No idle ack and RESET disable */
	writel(0x18, SDRC_REG(SYSCONFIG));

	/* SDRC Sharing register */
	/* 32-bit SDRAM on data lane [31:0] - CS0 */
	/* pin tri-stated = 1 */
	writel(0x00000100, SDRC_REG(SHARING));

	/* ----- SDRC Registers Configuration --------- */
	/* SDRC_MCFG0 register */
	writel(0x02584099, SDRC_REG(MCFG_0));

	/* SDRC_RFR_CTRL0 register */
	writel(0x54601, SDRC_REG(RFR_CTRL_0));

	/* SDRC_ACTIM_CTRLA0 register */
	writel(0xA29DB4C6, SDRC_REG(ACTIM_CTRLA_0));

	/* SDRC_ACTIM_CTRLB0 register */
	writel(0x12214, SDRC_REG(ACTIM_CTRLB_0));

	/* Disble Power Down of CKE due to 1 CKE on combo part */
	writel(0x00000081, SDRC_REG(POWER));

	/* SDRC_MANUAL command register */
	/* NOP command */
	writel(0x00000000, SDRC_REG(MANUAL_0));
	/* Precharge command */
	writel(0x00000001, SDRC_REG(MANUAL_0));
	/* Auto-refresh command */
	writel(0x00000002, SDRC_REG(MANUAL_0));
	/* Auto-refresh command */
	writel(0x00000002, SDRC_REG(MANUAL_0));

	/* SDRC MR0 register Burst length=4 */
	writel(0x00000032, SDRC_REG(MR_0));

	/* SDRC DLLA control register */
	writel(0x0000000A, SDRC_REG(DLLA_CTRL));

	return;
}

/**
 * @brief Do the pin muxing required for Board operation.
 * We enable ONLY the pins we require to set. OMAP provides pins which do not
 * have alternate modes. Such pins done need to be set.
 *
 * See @ref MUX_VAL for description of the muxing mode.
 *
 * @return void
 */
static void mux_config(void)
{
	/* SDRC_D0 - SDRC_D31 default mux mode is mode0 */

	/* GPMC */
	MUX_VAL(CP(GPMC_A1), (IDIS | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_A2), (IDIS | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_A3), (IDIS | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_A4), (IDIS | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_A5), (IDIS | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_A6), (IDIS | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_A7), (IDIS | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_A8), (IDIS | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_A9), (IDIS | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_A10), (IDIS | PTD | DIS | M0));

	/* D0-D7 default mux mode is mode0 */
	MUX_VAL(CP(GPMC_D8), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_D9), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_D10), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_D11), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_D12), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_D13), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_D14), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_D15), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_CLK), (IDIS | PTD | DIS | M0));
	/* GPMC_NADV_ALE default mux mode is mode0 */
	/* GPMC_NOE default mux mode is mode0 */
	/* GPMC_NWE default mux mode is mode0 */
	/* GPMC_NBE0_CLE default mux mode is mode0 */
	MUX_VAL(CP(GPMC_NBE0_CLE), (IDIS | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_NBE1), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(GPMC_NWP), (IEN | PTD | DIS | M0));
	/* GPMC_WAIT0 default mux mode is mode0 */
	MUX_VAL(CP(GPMC_WAIT1), (IEN | PTU | EN | M0));

	/* SERIAL INTERFACE */
	MUX_VAL(CP(UART3_CTS_RCTX), (IEN | PTD | EN | M0));
	MUX_VAL(CP(UART3_RTS_SD), (IDIS | PTD | DIS | M0));
	MUX_VAL(CP(UART3_RX_IRRX), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(UART3_TX_IRTX), (IDIS | PTD | DIS | M0));
	MUX_VAL(CP(HSUSB0_CLK), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(HSUSB0_STP), (IDIS | PTU | EN | M0));
	MUX_VAL(CP(HSUSB0_DIR), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(HSUSB0_NXT), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(HSUSB0_DATA0), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(HSUSB0_DATA1), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(HSUSB0_DATA2), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(HSUSB0_DATA3), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(HSUSB0_DATA4), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(HSUSB0_DATA5), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(HSUSB0_DATA6), (IEN | PTD | DIS | M0));
	MUX_VAL(CP(HSUSB0_DATA7), (IEN | PTD | DIS | M0));
	/* I2C1_SCL default mux mode is mode0 */
	/* I2C1_SDA default mux mode is mode0 */
	/* USB EHCI (port 2) */
	MUX_VAL(CP(MCSPI1_CS3),		(IEN  | PTU | DIS | M3));
	MUX_VAL(CP(MCSPI2_CLK),		(IEN  | PTU | DIS | M3));
	MUX_VAL(CP(MCSPI2_SIMO),	(IEN  | PTU | DIS | M3));
	MUX_VAL(CP(MCSPI2_SOMI),	(IEN  | PTU | DIS | M3));
	MUX_VAL(CP(MCSPI2_CS0),		(IEN  | PTU | DIS | M3));
	MUX_VAL(CP(MCSPI2_CS1),		(IEN  | PTU | DIS | M3));
	MUX_VAL(CP(ETK_D10_ES2),	(IDIS | PTU | DIS | M3));
	MUX_VAL(CP(ETK_D11_ES2),	(IDIS | PTU | DIS | M3));
	MUX_VAL(CP(ETK_D12_ES2),	(IEN  | PTU | DIS | M3));
	MUX_VAL(CP(ETK_D13_ES2),	(IEN  | PTU | DIS | M3));
	MUX_VAL(CP(ETK_D14_ES2),	(IEN  | PTU | DIS | M3));
	MUX_VAL(CP(ETK_D15_ES2),	(IEN  | PTU | DIS | M3));
	MUX_VAL(CP(UART2_RX),		(IEN  | PTD | DIS | M4)) /*GPIO_147*/;
}

/**
 * @brief The basic entry point for board initialization.
 *
 * This is called as part of machine init (after arch init).
 * This is again called with stack in SRAM, so not too many
 * constructs possible here.
 *
 * @return void
 */
void board_init(void)
{
	int in_sdram = running_in_sdram();

	mux_config();
	/* Dont reconfigure SDRAM while running in SDRAM! */
	if (!in_sdram)
		sdrc_init();
}

/******************** Board Run Time *******************/

#ifdef CONFIG_DRIVER_SERIAL_NS16550

static struct NS16550_plat serial_plat = {
	.clock = 48000000,      /* 48MHz (APLL96/2) */
	.shift = 2,
};

/**
 * @brief UART serial port initialization - remember to enable COM clocks in
 * arch
 *
 * @return result of device registration
 */
static int beagle_console_init(void)
{
	/* Register the serial port */
	add_ns16550_device(-1, OMAP_UART3_BASE, 1024, IORESOURCE_MEM_8BIT,
			   &serial_plat);

	return 0;
}
console_initcall(beagle_console_init);
#endif /* CONFIG_DRIVER_SERIAL_NS16550 */

#ifdef CONFIG_USB_EHCI_OMAP
static struct omap_hcd omap_ehci_pdata = {
	.port_mode[0] = EHCI_HCD_OMAP_MODE_PHY,
	.port_mode[1] = EHCI_HCD_OMAP_MODE_PHY,
	.port_mode[2] = EHCI_HCD_OMAP_MODE_UNKNOWN,
	.phy_reset  = 1,
	.reset_gpio_port[0]  = -EINVAL,
	.reset_gpio_port[1]  = 147,
	.reset_gpio_port[2]  = -EINVAL
};

static struct ehci_platform_data ehci_pdata = {
	.flags = 0,
};
#endif /* CONFIG_USB_EHCI_OMAP */

static struct i2c_board_info i2c_devices[] = {
	{
		I2C_BOARD_INFO("twl4030", 0x48),
	},
};

static int beagle_mem_init(void)
{
	arm_add_mem_device("ram0", 0x80000000, 128 * 1024 * 1024);

	return 0;
}
mem_initcall(beagle_mem_init);

static int beagle_devices_init(void)
{
	i2c_register_board_info(0, i2c_devices, ARRAY_SIZE(i2c_devices));
	add_generic_device("i2c-omap", -1, NULL, 0x4809C000, SZ_4K,
			   IORESOURCE_MEM, NULL);

#ifdef CONFIG_USB_EHCI_OMAP
	if (ehci_omap_init(&omap_ehci_pdata) >= 0)
		add_usb_ehci_device(-1, 0x48064700 + 0x100,
				    0x48064700 + 0x110, &ehci_pdata);
#endif /* CONFIG_USB_EHCI_OMAP */
#ifdef CONFIG_GPMC
	/* WP is made high and WAIT1 active Low */
	gpmc_generic_init(0x10);
#endif
	gpmc_generic_nand_devices_init(0, 16, OMAP_ECC_HAMMING_CODE_HW_ROMCODE);

	add_generic_device("omap-hsmmc", -1, NULL, OMAP_I2C1_BASE, 0,
			   IORESOURCE_MEM, NULL);

	armlinux_set_bootparams((void *)0x80000100);
	armlinux_set_architecture(MACH_TYPE_OMAP3_BEAGLE);

	return 0;
}
device_initcall(beagle_devices_init);
