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+/* linux/arch/arm/plat-samsung/include/plat/sdhci.h
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+ *
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+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
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+ * http://www.samsung.com
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+ *
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+ * Copyright 2008 Openmoko, Inc.
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+ * Copyright 2008 Simtec Electronics
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+ * http://armlinux.simtec.co.uk/
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+ * Ben Dooks <ben@simtec.co.uk>
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+ *
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+ * S3C Platform - SDHCI (HSMMC) platform data definitions
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+*/
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+
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+#ifndef __PLAT_S3C_SDHCI_H
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+#define __PLAT_S3C_SDHCI_H __FILE__
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+
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+#include <plat/devs.h>
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+
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+struct platform_device;
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+struct mmc_host;
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+struct mmc_card;
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+struct mmc_ios;
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+
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+enum cd_types {
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+ S3C_SDHCI_CD_INTERNAL, /* use mmc internal CD line */
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+ S3C_SDHCI_CD_EXTERNAL, /* use external callback */
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+ S3C_SDHCI_CD_GPIO, /* use external gpio pin for CD line */
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+ S3C_SDHCI_CD_NONE, /* no CD line, use polling to detect card */
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+ S3C_SDHCI_CD_PERMANENT, /* no CD line, card permanently wired to host */
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+};
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+
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+/**
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+ * struct s3c_sdhci_platdata() - Platform device data for Samsung SDHCI
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+ * @max_width: The maximum number of data bits supported.
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+ * @host_caps: Standard MMC host capabilities bit field.
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+ * @host_caps2: The second standard MMC host capabilities bit field.
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+ * @cd_type: Type of Card Detection method (see cd_types enum above)
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+ * @ext_cd_init: Initialize external card detect subsystem. Called on
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+ * sdhci-s3c driver probe when cd_type == S3C_SDHCI_CD_EXTERNAL.
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+ * notify_func argument is a callback to the sdhci-s3c driver
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+ * that triggers the card detection event. Callback arguments:
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+ * dev is pointer to platform device of the host controller,
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+ * state is new state of the card (0 - removed, 1 - inserted).
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+ * @ext_cd_cleanup: Cleanup external card detect subsystem. Called on
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+ * sdhci-s3c driver remove when cd_type == S3C_SDHCI_CD_EXTERNAL.
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+ * notify_func argument is the same callback as for ext_cd_init.
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+ * @ext_cd_gpio: gpio pin used for external CD line, valid only if
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+ * cd_type == S3C_SDHCI_CD_GPIO
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+ * @ext_cd_gpio_invert: invert values for external CD gpio line
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+ * @cfg_gpio: Configure the GPIO for a specific card bit-width
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+ *
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+ * Initialisation data specific to either the machine or the platform
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+ * for the device driver to use or call-back when configuring gpio or
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+ * card speed information.
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+*/
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+struct s3c_sdhci_platdata {
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+ unsigned int max_width;
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+ unsigned int host_caps;
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+ unsigned int host_caps2;
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+ unsigned int pm_caps;
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+ enum cd_types cd_type;
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+
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+ int ext_cd_gpio;
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+ bool ext_cd_gpio_invert;
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+ int (*ext_cd_init)(void (*notify_func)(struct platform_device *,
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+ int state));
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+ int (*ext_cd_cleanup)(void (*notify_func)(struct platform_device *,
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+ int state));
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+
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+ void (*cfg_gpio)(struct platform_device *dev, int width);
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+};
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+
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+/* s3c_sdhci_set_platdata() - common helper for setting SDHCI platform data
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+ * @pd: The default platform data for this device.
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李欣儒