/* Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * 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 <linux/init.h>
#include <linux/ioport.h>
#include <linux/platform_device.h>
#include <linux/bootmem.h>
#include <linux/gpio.h>
#include <asm/mach-types.h>
#include <asm/mach/mmc.h>
#include <mach/msm_bus_board.h>
#include <mach/board.h>
#include <mach/gpiomux.h>
#include <mach/socinfo.h>
#include "devices.h"

#include "board-8930.h"
#include "board-storage-common-a.h"

/* MSM8960 has 5 SDCC controllers */
enum sdcc_controllers {
	SDCC1,
	SDCC2,
	SDCC3,
	SDCC4,
	SDCC5,
	MAX_SDCC_CONTROLLER
};

/* All SDCC controllers require VDD/VCC voltage */
static struct msm_mmc_reg_data mmc_vdd_reg_data[MAX_SDCC_CONTROLLER] = {
	/* SDCC1 : eMMC card connected */
	[SDCC1] = {
		.name = "sdc_vdd",
		.high_vol_level = 2950000,
		.low_vol_level = 2950000,
		.always_on = 1,
		.lpm_sup = 1,
		.lpm_uA = 9000,
		.hpm_uA = 200000, /* 200mA */
	},
	/* SDCC3 : External card slot connected */
	[SDCC3] = {
		.name = "sdc_vdd",
		.high_vol_level = 2950000,
		.low_vol_level = 2950000,
		/*
		 * Normally this is not an always ON regulator. On this
		 * platform, unfortunately the sd detect line is connected
		 * to this via esd circuit and so turn this off/on while card
		 * is not present causes the sd detect line to toggle
		 * continuously. This is expected to be fixed in the newer
		 * hardware revisions - maybe once that is done, this can be
		 * reverted.
		 */
		.lpm_sup = 1,
		.hpm_uA = 800000, /* 800mA */
		.lpm_uA = 9000,
	},
};

/* All SDCC controllers may require voting for VDD PAD voltage */
static struct msm_mmc_reg_data mmc_vdd_io_reg_data[MAX_SDCC_CONTROLLER] = {
	/* SDCC1 : eMMC card connected */
	[SDCC1] = {
		.name = "sdc_vdd_io",
		.always_on = 1,
		.high_vol_level = 1800000,
		.low_vol_level = 1800000,
		.hpm_uA = 200000, /* 200mA */
	},
	/* SDCC3 : External card slot connected */
	[SDCC3] = {
		.name = "sdc_vdd_io",
		.high_vol_level = 2950000,
		.low_vol_level = 1850000,
		.always_on = 1,
		.lpm_sup = 1,
		/* Max. Active current required is 16 mA */
		.hpm_uA = 16000,
		/*
		 * Sleep current required is ~300 uA. But min. vote can be
		 * in terms of mA (min. 1 mA). So let's vote for 2 mA
		 * during sleep.
		 */
		.lpm_uA = 2000,
	}
};

static struct msm_mmc_slot_reg_data mmc_slot_vreg_data[MAX_SDCC_CONTROLLER] = {
	/* SDCC1 : eMMC card connected */
	[SDCC1] = {
		.vdd_data = &mmc_vdd_reg_data[SDCC1],
		.vdd_io_data = &mmc_vdd_io_reg_data[SDCC1],
	},
	/* SDCC3 : External card slot connected */
	[SDCC3] = {
		.vdd_data = &mmc_vdd_reg_data[SDCC3],
		.vdd_io_data = &mmc_vdd_io_reg_data[SDCC3],
	}
};

/* SDC1 pad data */
static struct msm_mmc_pad_drv sdc1_pad_drv_on_cfg[] = {
	{TLMM_HDRV_SDC1_CLK, GPIO_CFG_16MA},
	{TLMM_HDRV_SDC1_CMD, GPIO_CFG_10MA},
	{TLMM_HDRV_SDC1_DATA, GPIO_CFG_10MA}
};

static struct msm_mmc_pad_drv sdc1_pad_drv_off_cfg[] = {
	{TLMM_HDRV_SDC1_CLK, GPIO_CFG_2MA},
	{TLMM_HDRV_SDC1_CMD, GPIO_CFG_2MA},
	{TLMM_HDRV_SDC1_DATA, GPIO_CFG_2MA}
};

static struct msm_mmc_pad_pull sdc1_pad_pull_on_cfg[] = {
	{TLMM_PULL_SDC1_CLK, GPIO_CFG_NO_PULL},
	{TLMM_PULL_SDC1_CMD, GPIO_CFG_PULL_UP},
	{TLMM_PULL_SDC1_DATA, GPIO_CFG_PULL_UP}
};

static struct msm_mmc_pad_pull sdc1_pad_pull_off_cfg[] = {
	{TLMM_PULL_SDC1_CLK, GPIO_CFG_NO_PULL},
	{TLMM_PULL_SDC1_CMD, GPIO_CFG_PULL_UP},
	{TLMM_PULL_SDC1_DATA, GPIO_CFG_PULL_UP}
};

/* SDC3 pad data */
static struct msm_mmc_pad_drv sdc3_pad_drv_on_cfg[] = {
	{TLMM_HDRV_SDC3_CLK, GPIO_CFG_8MA},
	{TLMM_HDRV_SDC3_CMD, GPIO_CFG_8MA},
	{TLMM_HDRV_SDC3_DATA, GPIO_CFG_8MA}
};

static struct msm_mmc_pad_drv sdc3_pad_drv_off_cfg[] = {
	{TLMM_HDRV_SDC3_CLK, GPIO_CFG_2MA},
	{TLMM_HDRV_SDC3_CMD, GPIO_CFG_2MA},
	{TLMM_HDRV_SDC3_DATA, GPIO_CFG_2MA}
};

static struct msm_mmc_pad_pull sdc3_pad_pull_on_cfg[] = {
	{TLMM_PULL_SDC3_CLK, GPIO_CFG_NO_PULL},
	{TLMM_PULL_SDC3_CMD, GPIO_CFG_PULL_UP},
	{TLMM_PULL_SDC3_DATA, GPIO_CFG_PULL_UP}
};

static struct msm_mmc_pad_pull sdc3_pad_pull_off_cfg[] = {
	{TLMM_PULL_SDC3_CLK, GPIO_CFG_NO_PULL},
	/*
	 * SDC3 CMD line should be PULLed UP otherwise fluid platform will
	 * see transitions (1 -> 0 and 0 -> 1) on card detection line,
	 * which would result in false card detection interrupts.
	 */
	{TLMM_PULL_SDC3_CMD, GPIO_CFG_PULL_UP},
	/*
	 * Keeping DATA lines status to PULL UP will make sure that
	 * there is no current leak during sleep if external pull up
	 * is connected to DATA lines.
	 */
	{TLMM_PULL_SDC3_DATA, GPIO_CFG_PULL_UP}
};

static struct msm_mmc_pad_pull_data mmc_pad_pull_data[MAX_SDCC_CONTROLLER] = {
	[SDCC1] = {
		.on = sdc1_pad_pull_on_cfg,
		.off = sdc1_pad_pull_off_cfg,
		.size = ARRAY_SIZE(sdc1_pad_pull_on_cfg)
	},
	[SDCC3] = {
		.on = sdc3_pad_pull_on_cfg,
		.off = sdc3_pad_pull_off_cfg,
		.size = ARRAY_SIZE(sdc3_pad_pull_on_cfg)
	},
};

static struct msm_mmc_pad_drv_data mmc_pad_drv_data[MAX_SDCC_CONTROLLER] = {
	[SDCC1] = {
		.on = sdc1_pad_drv_on_cfg,
		.off = sdc1_pad_drv_off_cfg,
		.size = ARRAY_SIZE(sdc1_pad_drv_on_cfg)
	},
	[SDCC3] = {
		.on = sdc3_pad_drv_on_cfg,
		.off = sdc3_pad_drv_off_cfg,
		.size = ARRAY_SIZE(sdc3_pad_drv_on_cfg)
	},
};

static struct msm_mmc_pad_data mmc_pad_data[MAX_SDCC_CONTROLLER] = {
	[SDCC1] = {
		.pull = &mmc_pad_pull_data[SDCC1],
		.drv = &mmc_pad_drv_data[SDCC1]
	},
	[SDCC3] = {
		.pull = &mmc_pad_pull_data[SDCC3],
		.drv = &mmc_pad_drv_data[SDCC3]
	},
};

static struct msm_mmc_pin_data mmc_slot_pin_data[MAX_SDCC_CONTROLLER] = {
	[SDCC1] = {
		.pad_data = &mmc_pad_data[SDCC1],
	},
	[SDCC3] = {
		.pad_data = &mmc_pad_data[SDCC3],
	},
};

#define MSM_MPM_PIN_SDC1_DAT1	17
#define MSM_MPM_PIN_SDC3_DAT1	21

static unsigned int sdc1_sup_clk_rates[] = {
	400000, 24000000, 48000000, 96000000
};

#ifdef CONFIG_MMC_MSM_SDC3_SUPPORT
static unsigned int sdc3_sup_clk_rates[] = {
	400000, 24000000, 48000000, 96000000, 192000000,
};
#endif

#ifdef CONFIG_MMC_MSM_SDC1_SUPPORT
static struct mmc_platform_data msm8960_sdc1_data = {
	.ocr_mask       = MMC_VDD_27_28 | MMC_VDD_28_29,
#ifdef CONFIG_MMC_MSM_SDC1_8_BIT_SUPPORT
	.mmc_bus_width  = MMC_CAP_8_BIT_DATA,
#else
	.mmc_bus_width  = MMC_CAP_4_BIT_DATA,
#endif
	.sup_clk_table	= sdc1_sup_clk_rates,
	.sup_clk_cnt	= ARRAY_SIZE(sdc1_sup_clk_rates),
	.nonremovable	= 1,
	.vreg_data	= &mmc_slot_vreg_data[SDCC1],
	.pin_data	= &mmc_slot_pin_data[SDCC1],
	.mpm_sdiowakeup_int = MSM_MPM_PIN_SDC1_DAT1,
	.msm_bus_voting_data = &sps_to_ddr_bus_voting_data,
	.uhs_caps2	= MMC_CAP2_HS200_1_8V_SDR,
};
#endif

#ifdef CONFIG_MMC_MSM_SDC3_SUPPORT
static struct mmc_platform_data msm8960_sdc3_data = {
	.ocr_mask       = MMC_VDD_27_28 | MMC_VDD_28_29,
	.mmc_bus_width  = MMC_CAP_4_BIT_DATA,
	.sup_clk_table	= sdc3_sup_clk_rates,
	.sup_clk_cnt	= ARRAY_SIZE(sdc3_sup_clk_rates),
#ifdef CONFIG_MMC_MSM_SDC3_WP_SUPPORT
/*TODO: Insert right replacement for PM8038 */
#ifndef MSM8930_PHASE_2
	.wpswitch_gpio	= PM8921_GPIO_PM_TO_SYS(16),
#else
	.wpswitch_gpio	= 66,
	.is_wpswitch_active_low = true,
#endif
#endif
	.vreg_data	= &mmc_slot_vreg_data[SDCC3],
	.pin_data	= &mmc_slot_pin_data[SDCC3],
/*TODO: Insert right replacement for PM8038 */
#ifndef MSM8930_PHASE_2
	.status_gpio	= PM8921_GPIO_PM_TO_SYS(26),
	.status_irq	= PM8921_GPIO_IRQ(PM8921_IRQ_BASE, 26),
#else
	.status_gpio	= 94,
	.status_irq	= MSM_GPIO_TO_INT(94),
#endif
	.irq_flags	= IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
	.is_status_gpio_active_low = true,
	.xpc_cap	= 1,
	.uhs_caps	= (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
			MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_DDR50 |
			MMC_CAP_UHS_SDR104 | MMC_CAP_MAX_CURRENT_800),
	.mpm_sdiowakeup_int = MSM_MPM_PIN_SDC3_DAT1,
	.msm_bus_voting_data = &sps_to_ddr_bus_voting_data,
};
#endif

void __init msm8930_init_mmc(void)
{
#ifdef CONFIG_MMC_MSM_SDC1_SUPPORT
	/*
	 * When eMMC runs in DDR mode on CDP platform, we have
	 * seen instability due to DATA CRC errors. These errors are
	 * attributed to long physical path between MSM and eMMC on CDP.
	 * So let's not enable the DDR mode on CDP platform but let other
	 * platforms take advantage of eMMC DDR mode.
	 */
	if (!machine_is_msm8930_cdp())
		msm8960_sdc1_data.uhs_caps |= (MMC_CAP_1_8V_DDR |
					       MMC_CAP_UHS_DDR50);
	/* SDC1 : eMMC card connected */
	msm_add_sdcc(1, &msm8960_sdc1_data);
#endif
#ifdef CONFIG_MMC_MSM_SDC3_SUPPORT
	/*
	 * All 8930 platform boards using the 1.2 SoC have been reworked so that
	 * the sd card detect line's esd circuit is no longer powered by the sd
	 * card's voltage regulator. So this means we can turn the regulator off
	 * to save power without affecting the sd card detect functionality.
	 * This change to the boards will be true for newer versions of the SoC
	 * as well.
	 */
	if (SOCINFO_VERSION_MAJOR(socinfo_get_version()) == 1 &&
			SOCINFO_VERSION_MINOR(socinfo_get_version()) < 2) {
		msm8960_sdc3_data.vreg_data->vdd_data->always_on = true;
		msm8960_sdc3_data.vreg_data->vdd_data->reset_at_init = true;
	}
	/* SDC3: External card slot */
	if (!machine_is_msm8930_cdp()) {
		msm8960_sdc3_data.wpswitch_gpio = 0;
		msm8960_sdc3_data.is_wpswitch_active_low = false;
	}

	msm_add_sdcc(3, &msm8960_sdc3_data);
#endif
}