mmc.h

linux 内核源代码

/*
 * MMC definitions for OMAP2
 *
 * Copyright (C) 2006 Nokia Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef __OMAP2_MMC_H
#define __OMAP2_MMC_H

#include <linux/types.h>
#include <linux/device.h>
#include <linux/mmc/host.h>

#define OMAP_MMC_MAX_SLOTS	2

struct omap_mmc_platform_data {
	unsigned enabled:1;
	/* number of slots on board */
	unsigned nr_slots:2;
	/* nomux means "standard" muxing is wrong on this board, and that
	 * board-specific code handled it before common init logic.
	 */
	unsigned nomux:1;
	/* 4 wire signaling is optional, and is only used for SD/SDIO and
	 * MMCv4 */
	unsigned wire4:1;
	/* set if your board has components or wiring that limits the
	 * maximum frequency on the MMC bus */
	unsigned int max_freq;

	/* switch the bus to a new slot */
	int (* switch_slot)(struct device *dev, int slot);
	/* initialize board-specific MMC functionality, can be NULL if
	 * not supported */
	int (* init)(struct device *dev);
	void (* cleanup)(struct device *dev);

	struct omap_mmc_slot_data {
		int (* set_bus_mode)(struct device *dev, int slot, int bus_mode);
		int (* set_power)(struct device *dev, int slot, int power_on, int vdd);
		int (* get_ro)(struct device *dev, int slot);

		/* return MMC cover switch state, can be NULL if not supported.
		 *
		 * possible return values:
		 *   0 - open
		 *   1 - closed
		 */
		int (* get_cover_state)(struct device *dev, int slot);

		const char *name;
		u32 ocr_mask;
	} slots[OMAP_MMC_MAX_SLOTS];
};

extern void omap_set_mmc_info(int host, const struct omap_mmc_platform_data *info);

/* called from board-specific card detection service routine */
extern void omap_mmc_notify_card_detect(struct device *dev, int slot, int detected);
extern void omap_mmc_notify_cover_event(struct device *dev, int slot, int is_closed);

#endif