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/*
* arch/arm/mach-tegra/board-enterprise-sdhci.c
*
* Copyright (C) 2010 Google, Inc.
*
* 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/mmc/host.h>
#include <asm/mach-types.h>
#include <mach/irqs.h>
#include <mach/iomap.h>
#include <mach/sdhci.h>
#include "gpio-names.h"
#include "board.h"
#define TEGRA_ENTERPRISE_SD_CD TEGRA_GPIO_PI5
#define TEGRA_ENTERPRISE_SD_WP TEGRA_GPIO_PT3
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_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,
},
};
static struct tegra_sdhci_platform_data tegra_sdhci_platform_data0 = {
.clk_id = NULL,
.force_hs = 1,
.cd_gpio = -1,
.wp_gpio = -1,
.power_gpio = -1,
.tap_delay = 6,
.is_voltage_switch_supported = true,
.vsd_name = "vddio_sdmmc1",
.vsd_slot_name = "vddio_sd_slot",
.max_clk = 208000000,
.is_8bit_supported = false,
};
static struct tegra_sdhci_platform_data tegra_sdhci_platform_data3 = {
.clk_id = NULL,
.force_hs = 0,
.cd_gpio = -1,
.wp_gpio = -1,
.power_gpio = -1,
.tap_delay = 6,
.is_voltage_switch_supported = false,
.vsd_name = NULL,
.vsd_slot_name = NULL,
.max_clk = 48000000,
.is_8bit_supported = true,
};
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_device3 = {
.name = "sdhci-tegra",
.id = 3,
.resource = sdhci_resource3,
.num_resources = ARRAY_SIZE(sdhci_resource3),
.dev = {
.platform_data = &tegra_sdhci_platform_data3,
},
};
static int tegra_enterprise_sd_cd_gpio_init(void)
{
unsigned int rc = 0;
rc = gpio_request(TEGRA_ENTERPRISE_SD_CD, "card_detect");
if (rc) {
pr_err("Card detect gpio request failed:%d\n", rc);
return rc;
}
tegra_gpio_enable(TEGRA_ENTERPRISE_SD_CD);
rc = gpio_direction_input(TEGRA_ENTERPRISE_SD_CD);
if (rc) {
pr_err("Unable to configure direction for card detect gpio:%d\n", rc);
return rc;
}
return 0;
}
static int tegra_enterprise_sd_wp_gpio_init(void)
{
unsigned int rc = 0;
rc = gpio_request(TEGRA_ENTERPRISE_SD_WP, "write_protect");
if (rc) {
pr_err("Write protect gpio request failed:%d\n", rc);
return rc;
}
tegra_gpio_enable(TEGRA_ENTERPRISE_SD_WP);
rc = gpio_direction_input(TEGRA_ENTERPRISE_SD_WP);
if (rc) {
pr_err("Unable to configure direction for write protect gpio:%d\n", rc);
return rc;
}
return 0;
}
int __init tegra_enterprise_sdhci_init(void)
{
unsigned int rc = 0;
platform_device_register(&tegra_sdhci_device3);
/* Fix ME: The gpios have to enabled for hot plug support */
rc = tegra_enterprise_sd_cd_gpio_init();
if (!rc) {
tegra_sdhci_platform_data0.cd_gpio = TEGRA_ENTERPRISE_SD_CD;
tegra_sdhci_platform_data0.cd_gpio_polarity = 0;
}
rc = tegra_enterprise_sd_wp_gpio_init();
if (!rc) {
tegra_sdhci_platform_data0.wp_gpio = TEGRA_ENTERPRISE_SD_WP;
tegra_sdhci_platform_data0.wp_gpio_polarity = 1;
}
platform_device_register(&tegra_sdhci_device0);
return 0;
}
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