/*	$OpenBSD: sdmmcchip.h,v 1.15 2023/04/19 02:01:02 dlg 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_

#include <machine/bus.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, int);
	int	(*bus_width)(sdmmc_chipset_handle_t, int);
	/* command execution */
	void	(*exec_command)(sdmmc_chipset_handle_t,
		    struct sdmmc_command *);
	/* card interrupt */
	void	(*card_intr_mask)(sdmmc_chipset_handle_t, int);
	void	(*card_intr_ack)(sdmmc_chipset_handle_t);
	/* UHS functions */
	int	(*signal_voltage)(sdmmc_chipset_handle_t, int);
	int	(*execute_tuning)(sdmmc_chipset_handle_t, int);
	/* hibernate */
	int	(*hibernate_init)(sdmmc_chipset_handle_t, void *);
};

/* 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, timing)			\
	((tag)->bus_clock((handle), (freq), (timing)))
#define sdmmc_chip_bus_width(tag, handle, width)			\
	((tag)->bus_width((handle), (width)))
/* command execution */
#define sdmmc_chip_exec_command(tag, handle, cmdp)			\
	((tag)->exec_command((handle), (cmdp)))
/* card interrupt */
#define sdmmc_chip_card_intr_mask(tag, handle, enable)			\
	((tag)->card_intr_mask((handle), (enable)))
#define sdmmc_chip_card_intr_ack(tag, handle)				\
	((tag)->card_intr_ack((handle)))
/* UHS functions */
#define sdmmc_chip_signal_voltage(tag, handle, voltage)			\
	((tag)->signal_voltage((handle), (voltage)))
#define sdmmc_chip_execute_tuning(tag, handle, timing)			\
	((tag)->execute_tuning((handle), (timing)))

/* clock frequencies for sdmmc_chip_bus_clock() */
#define SDMMC_SDCLK_OFF		0
#define SDMMC_SDCLK_400KHZ	400
#define SDMMC_SDCLK_25MHZ	25000
#define SDMMC_SDCLK_50MHZ	50000

/* voltage levels for sdmmc_chip_signal_voltage() */
#define SDMMC_SIGNAL_VOLTAGE_330	0
#define SDMMC_SIGNAL_VOLTAGE_180	1

#define SDMMC_TIMING_LEGACY	0
#define SDMMC_TIMING_HIGHSPEED	1
#define SDMMC_TIMING_UHS_SDR50	2
#define SDMMC_TIMING_UHS_SDR104	3
#define SDMMC_TIMING_MMC_DDR52	4
#define SDMMC_TIMING_MMC_HS200	5

#define SDMMC_MAX_FUNCTIONS	8

struct sdmmcbus_attach_args {
	const char *saa_busname;
	sdmmc_chipset_tag_t sct;
	sdmmc_chipset_handle_t sch;
	bus_dma_tag_t dmat;
	bus_dmamap_t dmap;
	int	flags;
	int	caps;
	long	max_seg;
	long	max_xfer;
	bus_size_t dma_boundary;
	void	*cookies[SDMMC_MAX_FUNCTIONS];
};

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

#endif