path: root/arch/arm/mach-tegra/board-tegranote7c-sdhci.c

/*
 * arch/arm/mach-tegra/board-tegranote7c-sdhci.c
 *
 * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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/resource.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/regulator/consumer.h>
#include <linux/mmc/host.h>

#include <asm/mach-types.h>
#include <mach/irqs.h>
#include <mach/iomap.h>
#include <mach/sdhci.h>
#include <mach/gpio-tegra.h>
#include <mach/io_dpd.h>
#include <linux/wl12xx.h>

#include "tegra-board-id.h"
#include "gpio-names.h"
#include "board.h"
#include "board-tegranote7c.h"
#include "dvfs.h"

#define TEGRANOTE7C_SD_CD	TEGRA_GPIO_PV2
#define TEGRANOTE7C_SD_WP	TEGRA_GPIO_PQ4
#define TEGRANOTE7C_WLAN_PWR	TEGRA_GPIO_PCC5
#define TEGRANOTE7C_WLAN_RST	TEGRA_GPIO_PX7
#define TEGRANOTE7C_WLAN_WOW	TEGRA_GPIO_PU5
#if defined(CONFIG_WLCORE_EDP_SUPPORT)
#define ON 808 /* 808.236 mW */
#define OFF 0
static unsigned int wl_states[] = {ON, OFF};
#endif

static void (*wifi_status_cb)(int card_present, void *dev_id);
static void *wifi_status_cb_devid;
static int tegranote7c_wifi_status_register(void (*callback)(int , void *),
					void *);

static int tegranote7c_wifi_power(int on);
static int tegranote7c_wifi_set_carddetect(int val);

static struct wl12xx_platform_data tegranote7c_wl12xx_wlan_data __initdata = {
	.board_ref_clock = WL12XX_REFCLOCK_26,
	.board_tcxo_clock = 1,
	.set_power = tegranote7c_wifi_power,
	.set_carddetect = tegranote7c_wifi_set_carddetect,
#if defined(CONFIG_WLCORE_EDP_SUPPORT)
	.edp_info = {
		.client_info = {
			.name = "wl_edp_client",
			.states = wl_states,
			.num_states = ARRAY_SIZE(wl_states),
			.e0_index = 0,
			.priority = EDP_MAX_PRIO,
		},
		.registered = false,
	},
#endif
};

static struct resource sdhci_resource0[] = {
	[0] = {
		.start  = INT_SDMMC1,
		.end    = INT_SDMMC1,
		.flags  = IORESOURCE_IRQ,
	},
	[1] = {
		.start	= TEGRA_SDMMC1_BASE,
		.end	= TEGRA_SDMMC1_BASE + TEGRA_SDMMC1_SIZE-1,
		.flags	= IORESOURCE_MEM,
	},
};

static struct resource sdhci_resource2[] = {
	[0] = {
		.start  = INT_SDMMC3,
		.end    = INT_SDMMC3,
		.flags  = IORESOURCE_IRQ,
	},
	[1] = {
		.start	= TEGRA_SDMMC3_BASE,
		.end	= TEGRA_SDMMC3_BASE + TEGRA_SDMMC3_SIZE-1,
		.flags	= IORESOURCE_MEM,
	},
};

static struct resource sdhci_resource3[] = {
	[0] = {
		.start  = INT_SDMMC4,
		.end    = INT_SDMMC4,
		.flags  = IORESOURCE_IRQ,
	},
	[1] = {
		.start	= TEGRA_SDMMC4_BASE,
		.end	= TEGRA_SDMMC4_BASE + TEGRA_SDMMC4_SIZE-1,
		.flags	= IORESOURCE_MEM,
	},
};

#ifdef CONFIG_MMC_EMBEDDED_SDIO
static struct embedded_sdio_data embedded_sdio_data0 = {
	.cccr   = {
		.sdio_vsn       = 2,
		.multi_block    = 1,
		.low_speed      = 0,
		.wide_bus       = 0,
		.high_power     = 1,
		.high_speed     = 1,
	},
	.cis  = {
		.vendor	 = 0x02d0,
		.device	 = 0x4329,
	},
};
#endif

static struct tegra_sdhci_platform_data tegra_sdhci_platform_data0 = {
	.mmc_data = {
		.register_status_notify	= tegranote7c_wifi_status_register,
#ifdef CONFIG_MMC_EMBEDDED_SDIO
		.embedded_sdio = &embedded_sdio_data0,
#endif
		.built_in = 0,
		.ocr_mask = MMC_OCR_1V8_MASK,
	},
#ifndef CONFIG_MMC_EMBEDDED_SDIO
	.pm_flags = MMC_PM_KEEP_POWER,
#endif
	.cd_gpio = -1,
	.wp_gpio = -1,
	.power_gpio = -1,
	.tap_delay = 0x2,
	.trim_delay = 0x2,
	.ddr_clk_limit = 41000000,
	.uhs_mask = MMC_UHS_MASK_SDR104 |
		MMC_UHS_MASK_DDR50,
};

static struct tegra_sdhci_platform_data tegra_sdhci_platform_data2 = {
	.cd_gpio = TEGRANOTE7C_SD_CD,
	.wp_gpio = TEGRANOTE7C_SD_WP,
	.power_gpio = -1,
	.tap_delay = 0x3,
	.trim_delay = 0x3,
	.ddr_clk_limit = 41000000,
	.max_clk_limit = 156000000,
	.mmc_data = {
		.ocr_mask = MMC_OCR_2V8_MASK,
	},
	.uhs_mask = MMC_UHS_MASK_DDR50,
	.edp_support = true,
	.edp_states = {966, 0},
	.power_off_rail = true,
};

static struct tegra_sdhci_platform_data tegra_sdhci_platform_data3 = {
	.cd_gpio = -1,
	.wp_gpio = -1,
	.power_gpio = -1,
	.is_8bit = 1,
	.tap_delay = 0x5,
	.trim_delay = 0xA,
	.ddr_clk_limit = 41000000,
	.max_clk_limit = 156000000,
	.mmc_data = {
		.built_in = 1,
		.ocr_mask = MMC_OCR_1V8_MASK,
	},
	.edp_support = true,
	.edp_states = {966, 0},
};

static struct platform_device tegra_sdhci_device0 = {
	.name		= "sdhci-tegra",
	.id		= 0,
	.resource	= sdhci_resource0,
	.num_resources	= ARRAY_SIZE(sdhci_resource0),
	.dev = {
		.platform_data = &tegra_sdhci_platform_data0,
	},
};

static struct platform_device tegra_sdhci_device2 = {
	.name		= "sdhci-tegra",
	.id		= 2,
	.resource	= sdhci_resource2,
	.num_resources	= ARRAY_SIZE(sdhci_resource2),
	.dev = {
		.platform_data = &tegra_sdhci_platform_data2,
	},
};

static struct platform_device tegra_sdhci_device3 = {
	.name		= "sdhci-tegra",
	.id		= 3,
	.resource	= sdhci_resource3,
	.num_resources	= ARRAY_SIZE(sdhci_resource3),
	.dev = {
		.platform_data = &tegra_sdhci_platform_data3,
	},
};

static int tegranote7c_wifi_status_register(
		void (*callback)(int card_present, void *dev_id),
		void *dev_id)
{
	if (wifi_status_cb)
		return -EAGAIN;
	wifi_status_cb = callback;
	wifi_status_cb_devid = dev_id;
	return 0;
}

static int tegranote7c_wifi_set_carddetect(int val)
{
	pr_debug("%s: %d\n", __func__, val);
	if (wifi_status_cb)
		wifi_status_cb(val, wifi_status_cb_devid);
	else
		pr_warning("%s: Nobody to notify\n", __func__);
	return 0;
}

static int tegranote7c_wifi_power(int on)
{
	pr_debug("%s: %d\n", __func__, on);

	if (on) {
		gpio_set_value(TEGRANOTE7C_WLAN_RST, 1);
		mdelay(100);
		gpio_set_value(TEGRANOTE7C_WLAN_RST, 0);
		mdelay(100);
		gpio_set_value(TEGRANOTE7C_WLAN_RST, 1);
		mdelay(100);
		gpio_set_value(TEGRANOTE7C_WLAN_PWR, 1);
		mdelay(200);
	} else {
		gpio_set_value(TEGRANOTE7C_WLAN_RST, 0);
		mdelay(100);
		gpio_set_value(TEGRANOTE7C_WLAN_PWR, 0);
	}

	return 0;
}

static int __init tegranote7c_wifi_init(void)
{
	int rc;

	rc = gpio_request(TEGRANOTE7C_WLAN_PWR, "wlan_power");
	if (rc)
		pr_err("WLAN_PWR gpio request failed:%d\n", rc);
	rc = gpio_request(TEGRANOTE7C_WLAN_RST, "wlan_rst");
	if (rc)
		pr_err("WLAN_RST gpio request failed:%d\n", rc);
	rc = gpio_request(TEGRANOTE7C_WLAN_WOW, "bcmsdh_sdmmc");
	if (rc)
		pr_err("WLAN_WOW gpio request failed:%d\n", rc);

	rc = gpio_direction_output(TEGRANOTE7C_WLAN_PWR, 0);
	if (rc)
		pr_err("WLAN_PWR gpio direction configuration failed:%d\n", rc);
	rc = gpio_direction_output(TEGRANOTE7C_WLAN_RST, 0);
	if (rc)
		pr_err("WLAN_RST gpio direction configuration failed:%d\n", rc);
	rc = gpio_direction_input(TEGRANOTE7C_WLAN_WOW);
	if (rc)
		pr_err("WLAN_WOW gpio direction configuration failed:%d\n", rc);
	tegranote7c_wl12xx_wlan_data.irq = gpio_to_irq(TEGRANOTE7C_WLAN_WOW);
		wl12xx_set_platform_data(&tegranote7c_wl12xx_wlan_data);
	return 0;
}

#ifdef CONFIG_TEGRA_PREPOWER_WIFI
static int __init tegranote7c_wifi_prepower(void)
{
	if (!machine_is_tegranote7c())
		return 0;

#ifdef CONFIG_ANDROID
	/* In charger mode, don't power on wifi. */
	if (get_androidboot_mode_charger())
		return 0;
#endif

	tegranote7c_wifi_power(1);

	return 0;
}

subsys_initcall_sync(tegranote7c_wifi_prepower);
#endif

int __init tegranote7c_sdhci_init(void)
{
	int nominal_core_mv;
	int min_vcore_override_mv;
	int boot_vcore_mv;
	struct board_info board_info;
	nominal_core_mv =
		tegra_dvfs_rail_get_nominal_millivolts(tegra_core_rail);
	if (nominal_core_mv) {
		tegra_sdhci_platform_data0.nominal_vcore_mv = nominal_core_mv;
		tegra_sdhci_platform_data2.nominal_vcore_mv = nominal_core_mv;
		tegra_sdhci_platform_data3.nominal_vcore_mv = nominal_core_mv;
	}
	min_vcore_override_mv =
		tegra_dvfs_rail_get_override_floor(tegra_core_rail);
	if (min_vcore_override_mv) {
		tegra_sdhci_platform_data0.min_vcore_override_mv =
			min_vcore_override_mv;
		tegra_sdhci_platform_data2.min_vcore_override_mv =
			min_vcore_override_mv;
		tegra_sdhci_platform_data3.min_vcore_override_mv =
			min_vcore_override_mv;
	}
	boot_vcore_mv = tegra_dvfs_rail_get_boot_level(tegra_core_rail);
	if (boot_vcore_mv) {
		tegra_sdhci_platform_data0.boot_vcore_mv = boot_vcore_mv;
		tegra_sdhci_platform_data2.boot_vcore_mv = boot_vcore_mv;
		tegra_sdhci_platform_data3.boot_vcore_mv = boot_vcore_mv;
	}

	tegra_get_board_info(&board_info);
	if (board_info.board_id == BOARD_P1988)
		tegra_sdhci_platform_data2.wp_gpio = -1;
	if ((tegra_sdhci_platform_data3.uhs_mask & MMC_MASK_HS200)
	&& (!(tegra_sdhci_platform_data3.uhs_mask & MMC_UHS_MASK_DDR50)))
		tegra_sdhci_platform_data3.trim_delay = 0;
	platform_device_register(&tegra_sdhci_device3);

#ifdef CONFIG_ANDROID
	/* In charger mode, don't register wifi and external sd. */
	if (get_androidboot_mode_charger())
		return 0;
#endif

	/* sdcard slot is muxed to UART-A */
	if (get_tegra_uart_debug_port_id() != UART_FROM_SDCARD)
		platform_device_register(&tegra_sdhci_device2);

	platform_device_register(&tegra_sdhci_device0);
	tegranote7c_wifi_init();
	return 0;
}