/*	$OpenBSD: sdmmcchip.h,v 1.2 2006/07/18 04:10:35 uwe Exp $	*/

/*
 * Copyright (c) 2006 Uwe Stuehler <uwe@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef _SDMMC_CHIP_H_
#define _SDMMC_CHIP_H_

struct sdmmc_command;

typedef struct sdmmc_chip_functions *sdmmc_chipset_tag_t;
typedef void *sdmmc_chipset_handle_t;

struct sdmmc_chip_functions {
	/* host controller reset */
	int	(*host_reset)(sdmmc_chipset_handle_t);
	/* host capabilities */
	u_int32_t (*host_ocr)(sdmmc_chipset_handle_t);
	int	(*host_maxblklen)(sdmmc_chipset_handle_t);
	/* card detection */
	int	(*card_detect)(sdmmc_chipset_handle_t);
	/* bus power and clock frequency */
	int	(*bus_power)(sdmmc_chipset_handle_t, u_int32_t);
	int	(*bus_clock)(sdmmc_chipset_handle_t, int);
	/* command execution */
	void	(*exec_command)(sdmmc_chipset_handle_t,
		    struct sdmmc_command *);
};

/* host controller reset */
#define sdmmc_chip_host_reset(tag, handle)				\
	((tag)->host_reset((handle)))
/* host capabilities */
#define sdmmc_chip_host_ocr(tag, handle)				\
	((tag)->host_ocr((handle)))
#define sdmmc_chip_host_maxblklen(tag, handle)				\
	((tag)->host_maxblklen((handle)))
/* card detection */
#define sdmmc_chip_card_detect(tag, handle)				\
	((tag)->card_detect((handle)))
/* bus power and clock frequency */
#define sdmmc_chip_bus_power(tag, handle, ocr)				\
	((tag)->bus_power((handle), (ocr)))
#define sdmmc_chip_bus_clock(tag, handle, freq)				\
	((tag)->bus_clock((handle), (freq)))
/* command execution */
#define sdmmc_chip_exec_command(tag, handle, cmdp)			\
	((tag)->exec_command((handle), (cmdp)))

/* clock frequencies for sdmmc_chip_bus_clock() */
#define SDMMC_SDCLK_OFF		0
#define SDMMC_SDCLK_400KHZ	400
#define SDMMC_SDCLK_25MHZ	25000

struct sdmmcbus_attach_args {
	const char *saa_busname;
	sdmmc_chipset_tag_t sct;
	sdmmc_chipset_handle_t sch;
};

void	sdmmc_needs_discover(struct device *);
void	sdmmc_delay(u_int);

#endif
