/*
 * TI DA850/OMAP-L138 EVM board
 *
 * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
 *
 * Derived from: arch/arm/mach-davinci/board-da830-evm.c
 * Original Copyrights follow:
 *
 * 2007, 2009 (c) MontaVista Software, Inc. This file is licensed under
 * the terms of the GNU General Public License version 2. This program
 * is licensed "as is" without any warranty of any kind, whether express
 * or implied.
 */
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/gpio_keys.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/i2c/at24.h>
#include <linux/i2c/pca953x.h>
#include <linux/input.h>
#include <linux/input/tps6507x-ts.h>
#include <linux/mfd/tps6507x.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/platform_device.h>
#include <linux/platform_data/mtd-davinci.h>
#include <linux/platform_data/mtd-davinci-aemif.h>
#include <linux/platform_data/spi-davinci.h>
#include <linux/platform_data/uio_pruss.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/tps6507x.h>
#include <linux/spi/spi.h>
#include <linux/spi/flash.h>
#include <linux/wl12xx.h>

#include <mach/cp_intc.h>
#include <mach/da8xx.h>
#include <mach/mux.h>
#include <mach/sram.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/system_info.h>

#include <media/tvp514x.h>
#include <media/adv7343.h>

#define DA850_EVM_PHY_ID		"davinci_mdio-0:00"
#define DA850_LCD_PWR_PIN		GPIO_TO_PIN(2, 8)
#define DA850_LCD_BL_PIN		GPIO_TO_PIN(2, 15)

#define DA850_MMCSD_CD_PIN		GPIO_TO_PIN(4, 0)
#define DA850_MMCSD_WP_PIN		GPIO_TO_PIN(4, 1)

#define DA850_WLAN_EN			GPIO_TO_PIN(6, 9)
#define DA850_WLAN_IRQ			GPIO_TO_PIN(6, 10)

#define DA850_MII_MDIO_CLKEN_PIN	GPIO_TO_PIN(2, 6)

static struct mtd_partition da850evm_spiflash_part[] = {
	[0] = {
		.name = "UBL",
		.offset = 0,
		.size = SZ_64K,
		.mask_flags = MTD_WRITEABLE,
	},
	[1] = {
		.name = "U-Boot",
		.offset = MTDPART_OFS_APPEND,
		.size = SZ_512K,
		.mask_flags = MTD_WRITEABLE,
	},
	[2] = {
		.name = "U-Boot-Env",
		.offset = MTDPART_OFS_APPEND,
		.size = SZ_64K,
		.mask_flags = MTD_WRITEABLE,
	},
	[3] = {
		.name = "Kernel",
		.offset = MTDPART_OFS_APPEND,
		.size = SZ_2M + SZ_512K,
		.mask_flags = 0,
	},
	[4] = {
		.name = "Filesystem",
		.offset = MTDPART_OFS_APPEND,
		.size = SZ_4M,
		.mask_flags = 0,
	},
	[5] = {
		.name = "MAC-Address",
		.offset = SZ_8M - SZ_64K,
		.size = SZ_64K,
		.mask_flags = MTD_WRITEABLE,
	},
};

static struct flash_platform_data da850evm_spiflash_data = {
	.name		= "m25p80",
	.parts		= da850evm_spiflash_part,
	.nr_parts	= ARRAY_SIZE(da850evm_spiflash_part),
	.type		= "m25p64",
};

static struct davinci_spi_config da850evm_spiflash_cfg = {
	.io_type	= SPI_IO_TYPE_DMA,
	.c2tdelay	= 8,
	.t2cdelay	= 8,
};

static struct spi_board_info da850evm_spi_info[] = {
	{
		.modalias		= "m25p80",
		.platform_data		= &da850evm_spiflash_data,
		.controller_data	= &da850evm_spiflash_cfg,
		.mode			= SPI_MODE_0,
		.max_speed_hz		= 30000000,
		.bus_num		= 1,
		.chip_select		= 0,
	},
};

#ifdef CONFIG_MTD
static void da850_evm_m25p80_notify_add(struct mtd_info *mtd)
{
	char *mac_addr = davinci_soc_info.emac_pdata->mac_addr;
	size_t retlen;

	if (!strcmp(mtd->name, "MAC-Address")) {
		mtd_read(mtd, 0, ETH_ALEN, &retlen, mac_addr);
		if (retlen == ETH_ALEN)
			pr_info("Read MAC addr from SPI Flash: %pM\n",
				mac_addr);
	}
}

static struct mtd_notifier da850evm_spi_notifier = {
	.add	= da850_evm_m25p80_notify_add,
};

static void da850_evm_setup_mac_addr(void)
{
	register_mtd_user(&da850evm_spi_notifier);
}
#else
static void da850_evm_setup_mac_addr(void) { }
#endif

static struct mtd_partition da850_evm_norflash_partition[] = {
	{
		.name           = "bootloaders + env",
		.offset         = 0,
		.size           = SZ_512K,
		.mask_flags     = MTD_WRITEABLE,
	},
	{
		.name           = "kernel",
		.offset         = MTDPART_OFS_APPEND,
		.size           = SZ_2M,
		.mask_flags     = 0,
	},
	{
		.name           = "filesystem",
		.offset         = MTDPART_OFS_APPEND,
		.size           = MTDPART_SIZ_FULL,
		.mask_flags     = 0,
	},
};

static struct physmap_flash_data da850_evm_norflash_data = {
	.width		= 2,
	.parts		= da850_evm_norflash_partition,
	.nr_parts	= ARRAY_SIZE(da850_evm_norflash_partition),
};

static struct resource da850_evm_norflash_resource[] = {
	{
		.start	= DA8XX_AEMIF_CS2_BASE,
		.end	= DA8XX_AEMIF_CS2_BASE + SZ_32M - 1,
		.flags	= IORESOURCE_MEM,
	},
};

static struct platform_device da850_evm_norflash_device = {
	.name		= "physmap-flash",
	.id		= 0,
	.dev		= {
		.platform_data  = &da850_evm_norflash_data,
	},
	.num_resources	= 1,
	.resource	= da850_evm_norflash_resource,
};

static struct davinci_pm_config da850_pm_pdata = {
	.sleepcount = 128,
};

static struct platform_device da850_pm_device = {
	.name           = "pm-davinci",
	.dev = {
		.platform_data	= &da850_pm_pdata,
	},
	.id             = -1,
};

/* DA850/OMAP-L138 EVM includes a 512 MByte large-page NAND flash
 * (128K blocks). It may be used instead of the (default) SPI flash
 * to boot, using TI's tools to install the secondary boot loader
 * (UBL) and U-Boot.
 */
static struct mtd_partition da850_evm_nandflash_partition[] = {
	{
		.name		= "u-boot env",
		.offset		= 0,
		.size		= SZ_128K,
		.mask_flags	= MTD_WRITEABLE,
	 },
	{
		.name		= "UBL",
		.offset		= MTDPART_OFS_APPEND,
		.size		= SZ_128K,
		.mask_flags	= MTD_WRITEABLE,
	},
	{
		.name		= "u-boot",
		.offset		= MTDPART_OFS_APPEND,
		.size		= 4 * SZ_128K,
		.mask_flags	= MTD_WRITEABLE,
	},
	{
		.name		= "kernel",
		.offset		= 0x200000,
		.size		= SZ_2M,
		.mask_flags	= 0,
	},
	{
		.name		= "filesystem",
		.offset		= MTDPART_OFS_APPEND,
		.size		= MTDPART_SIZ_FULL,
		.mask_flags	= 0,
	},
};

static struct davinci_aemif_timing da850_evm_nandflash_timing = {
	.wsetup		= 24,
	.wstrobe	= 21,
	.whold		= 14,
	.rsetup		= 19,
	.rstrobe	= 50,
	.rhold		= 0,
	.ta		= 20,
};

static struct davinci_nand_pdata da850_evm_nandflash_data = {
	.parts		= da850_evm_nandflash_partition,
	.nr_parts	= ARRAY_SIZE(da850_evm_nandflash_partition),
	.ecc_mode	= NAND_ECC_HW,
	.ecc_bits	= 4,
	.bbt_options	= NAND_BBT_USE_FLASH,
	.timing		= &da850_evm_nandflash_timing,
};

static struct resource da850_evm_nandflash_resource[] = {
	{
		.start	= DA8XX_AEMIF_CS3_BASE,
		.end	= DA8XX_AEMIF_CS3_BASE + SZ_512K + 2 * SZ_1K - 1,
		.flags	= IORESOURCE_MEM,
	},
	{
		.start	= DA8XX_AEMIF_CTL_BASE,
		.end	= DA8XX_AEMIF_CTL_BASE + SZ_32K - 1,
		.flags	= IORESOURCE_MEM,
	},
};

static struct platform_device da850_evm_nandflash_device = {
	.name		= "davinci_nand",
	.id		= 1,
	.dev		= {
		.platform_data	= &da850_evm_nandflash_data,
	},
	.num_resources	= ARRAY_SIZE(da850_evm_nandflash_resource),
	.resource	= da850_evm_nandflash_resource,
};

static struct platform_device *da850_evm_devices[] = {
	&da850_evm_nandflash_device,
	&da850_evm_norflash_device,
};

#define DA8XX_AEMIF_CE2CFG_OFFSET	0x10
#define DA8XX_AEMIF_ASIZE_16BIT		0x1

static void __init da850_evm_init_nor(void)
{
	void __iomem *aemif_addr;

	aemif_addr = ioremap(DA8XX_AEMIF_CTL_BASE, SZ_32K);

	/* Configure data bus width of CS2 to 16 bit */
	writel(readl(aemif_addr + DA8XX_AEMIF_CE2CFG_OFFSET) |
		DA8XX_AEMIF_ASIZE_16BIT,
		aemif_addr + DA8XX_AEMIF_CE2CFG_OFFSET);

	iounmap(aemif_addr);
}

static const short da850_evm_nand_pins[] = {
	DA850_EMA_D_0, DA850_EMA_D_1, DA850_EMA_D_2, DA850_EMA_D_3,
	DA850_EMA_D_4, DA850_EMA_D_5, DA850_EMA_D_6, DA850_EMA_D_7,
	DA850_EMA_A_1, DA850_EMA_A_2, DA850_NEMA_CS_3, DA850_NEMA_CS_4,
	DA850_NEMA_WE, DA850_NEMA_OE,
	-1
};

static const short da850_evm_nor_pins[] = {
	DA850_EMA_BA_1, DA850_EMA_CLK, DA850_EMA_WAIT_1, DA850_NEMA_CS_2,
	DA850_NEMA_WE, DA850_NEMA_OE, DA850_EMA_D_0, DA850_EMA_D_1,
	DA850_EMA_D_2, DA850_EMA_D_3, DA850_EMA_D_4, DA850_EMA_D_5,
	DA850_EMA_D_6, DA850_EMA_D_7, DA850_EMA_D_8, DA850_EMA_D_9,
	DA850_EMA_D_10, DA850_EMA_D_11, DA850_EMA_D_12, DA850_EMA_D_13,
	DA850_EMA_D_14, DA850_EMA_D_15, DA850_EMA_A_0, DA850_EMA_A_1,
	DA850_EMA_A_2, DA850_EMA_A_3, DA850_EMA_A_4, DA850_EMA_A_5,
	DA850_EMA_A_6, DA850_EMA_A_7, DA850_EMA_A_8, DA850_EMA_A_9,
	DA850_EMA_A_10, DA850_EMA_A_11, DA850_EMA_A_12, DA850_EMA_A_13,
	DA850_EMA_A_14, DA850_EMA_A_15, DA850_EMA_A_16, DA850_EMA_A_17,
	DA850_EMA_A_18, DA850_EMA_A_19, DA850_EMA_A_20, DA850_EMA_A_21,
	DA850_EMA_A_22, DA850_EMA_A_23,
	-1
};

#if defined(CONFIG_MMC_DAVINCI) || \
    defined(CONFIG_MMC_DAVINCI_MODULE)
#define HAS_MMC 1
#else
#define HAS_MMC 0
#endif

static inline void da850_evm_setup_nor_nand(void)
{
	int ret = 0;

	if (!HAS_MMC) {
		ret = davinci_cfg_reg_list(da850_evm_nand_pins);
		if (ret)
			pr_warning("da850_evm_init: nand mux setup failed: "
					"%d\n", ret);

		ret = davinci_cfg_reg_list(da850_evm_nor_pins);
		if (ret)
			pr_warning("da850_evm_init: nor mux setup failed: %d\n",
				ret);

		da850_evm_init_nor();

		platform_add_devices(da850_evm_devices,
					ARRAY_SIZE(da850_evm_devices));
	}
}

#ifdef CONFIG_DA850_UI_RMII
static inline void da850_evm_setup_emac_rmii(int rmii_sel)
{
	struct davinci_soc_info *soc_info = &davinci_soc_info;

	soc_info->emac_pdata->rmii_en = 1;
	gpio_set_value_cansleep(rmii_sel, 0);
}
#else
static inline void da850_evm_setup_emac_rmii(int rmii_sel) { }
#endif


#define DA850_KEYS_DEBOUNCE_MS	10
/*
 * At 200ms polling interval it is possible to miss an
 * event by tapping very lightly on the push button but most
 * pushes do result in an event; longer intervals require the
 * user to hold the button whereas shorter intervals require
 * more CPU time for polling.
 */
#define DA850_GPIO_KEYS_POLL_MS	200

enum da850_evm_ui_exp_pins {
	DA850_EVM_UI_EXP_SEL_C = 5,
	DA850_EVM_UI_EXP_SEL_B,
	DA850_EVM_UI_EXP_SEL_A,
	DA850_EVM_UI_EXP_PB8,
	DA850_EVM_UI_EXP_PB7,
	DA850_EVM_UI_EXP_PB6,
	DA850_EVM_UI_EXP_PB5,
	DA850_EVM_UI_EXP_PB4,
	DA850_EVM_UI_EXP_PB3,
	DA850_EVM_UI_EXP_PB2,
	DA850_EVM_UI_EXP_PB1,
};

static const char const *da850_evm_ui_exp[] = {
	[DA850_EVM_UI_EXP_SEL_C]        = "sel_c",
	[DA850_EVM_UI_EXP_SEL_B]        = "sel_b",
	[DA850_EVM_UI_EXP_SEL_A]        = "sel_a",
	[DA850_EVM_UI_EXP_PB8]          = "pb8",
	[DA850_EVM_UI_EXP_PB7]          = "pb7",
	[DA850_EVM_UI_EXP_PB6]          = "pb6",
	[DA850_EVM_UI_EXP_PB5]          = "pb5",
	[DA850_EVM_UI_EXP_PB4]          = "pb4",
	[DA850_EVM_UI_EXP_PB3]          = "pb3",
	[DA850_EVM_UI_EXP_PB2]          = "pb2",
	[DA850_EVM_UI_EXP_PB1]          = "pb1",
};

#define DA850_N_UI_PB		8

static struct gpio_keys_button da850_evm_ui_keys[] = {
	[0 ... DA850_N_UI_PB - 1] = {
		.type			= EV_KEY,
		.active_low		= 1,
		.wakeup			= 0,
		.debounce_interval	= DA850_KEYS_DEBOUNCE_MS,
		.code			= -1, /* assigned at runtime */
		.gpio			= -1, /* assigned at runtime */
		.desc			= NULL, /* assigned at runtime */
	},
};

static struct gpio_keys_platform_data da850_evm_ui_keys_pdata = {
	.buttons = da850_evm_ui_keys,
	.nbuttons = ARRAY_SIZE(da850_evm_ui_keys),
	.poll_interval = DA850_GPIO_KEYS_POLL_MS,
};

static struct platform_device da850_evm_ui_keys_device = {
	.name = "gpio-keys-polled",
	.id = 0,
	.dev = {
		.platform_data = &da850_evm_ui_keys_pdata
	},
};

static void da850_evm_ui_keys_init(unsigned gpio)
{
	int i;
	struct gpio_keys_button *button;

	for (i = 0; i < DA850_N_UI_PB; i++) {
		button = &da850_evm_ui_keys[i];
		button->code = KEY_F8 - i;
		button->desc = (char *)
				da850_evm_ui_exp[DA850_EVM_UI_EXP_PB8 + i];
		button->gpio = gpio + DA850_EVM_UI_EXP_PB8 + i;
	}
}

#ifdef CONFIG_DA850_UI_SD_VIDEO_PORT
static inline void da850_evm_setup_video_port(int video_sel)
{
	gpio_set_value_cansleep(video_sel, 0);
}
#else
static inline void da850_evm_setup_video_port(int video_sel) { }
#endif

static int da850_evm_ui_expander_setup(struct i2c_client *client, unsigned gpio,
						unsigned ngpio, void *c)
{
	int sel_a, sel_b, sel_c, ret;

	sel_a = gpio + DA850_EVM_UI_EXP_SEL_A;
	sel_b = gpio + DA850_EVM_UI_EXP_SEL_B;
	sel_c = gpio + DA850_EVM_UI_EXP_SEL_C;

	ret = gpio_request(sel_a, da850_evm_ui_exp[DA850_EVM_UI_EXP_SEL_A]);
	if (ret) {
		pr_warning("Cannot open UI expander pin %d\n", sel_a);
		goto exp_setup_sela_fail;
	}

	ret = gpio_request(sel_b, da850_evm_ui_exp[DA850_EVM_UI_EXP_SEL_B]);
	if (ret) {
		pr_warning("Cannot open UI expander pin %d\n", sel_b);
		goto exp_setup_selb_fail;
	}

	ret = gpio_request(sel_c, da850_evm_ui_exp[DA850_EVM_UI_EXP_SEL_C]);
	if (ret) {
		pr_warning("Cannot open UI expander pin %d\n", sel_c);
		goto exp_setup_selc_fail;
	}

	/* deselect all functionalities */
	gpio_direction_output(sel_a, 1);
	gpio_direction_output(sel_b, 1);
	gpio_direction_output(sel_c, 1);

	da850_evm_ui_keys_init(gpio);
	ret = platform_device_register(&da850_evm_ui_keys_device);
	if (ret) {
		pr_warning("Could not register UI GPIO expander push-buttons");
		goto exp_setup_keys_fail;
	}

	pr_info("DA850/OMAP-L138 EVM UI card detected\n");

	da850_evm_setup_nor_nand();

	da850_evm_setup_emac_rmii(sel_a);

	da850_evm_setup_video_port(sel_c);

	return 0;

exp_setup_keys_fail:
	gpio_free(sel_c);
exp_setup_selc_fail:
	gpio_free(sel_b);
exp_setup_selb_fail:
	gpio_free(sel_a);
exp_setup_sela_fail:
	return ret;