/*
 * File      : mmcsd_core.h
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2006, RT-Thread Development Team
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rt-thread.org/license/LICENSE
 *
 * Change Logs:
 * Date           Author		Notes
 * 2011-07-25     weety		first version
 */

#ifndef __CORE_H__
#define __CORE_H__

#include <rtthread.h>
#include "mmcsd_host.h"
#include "mmcsd_card.h"
#include "mmcsd_cmd.h"

#ifdef __cplusplus
extern "C" {
#endif

#ifdef RT_MMCSD_DBG
#define mmcsd_dbg(fmt, ...)  rt_kprintf(fmt, ##__VA_ARGS__)
#else
#define mmcsd_dbg(fmt, ...)
#endif

struct rt_mmcsd_data {
	rt_uint32_t  blksize;
	rt_uint32_t  blks;
	rt_uint32_t  *buf;
	rt_int32_t  err;
	rt_uint32_t  flags;
#define DATA_DIR_WRITE	(1 << 0)
#define DATA_DIR_READ	(1 << 1)
#define DATA_STREAM	(1 << 2)
	rt_uint32_t  timeout_ns;
	rt_uint32_t  timeout_clks;
};

struct rt_mmcsd_cmd {
	rt_uint32_t  cmd_code;
	rt_uint32_t  arg;
	rt_uint32_t  resp[4];
	rt_uint32_t  flags;
/*rsponse types 
 *bits:0~3
 */
#define RESP_MASK	(0xF)
#define RESP_NONE	(0)
#define RESP_R1		(1 << 0)
#define RESP_R1B	(2 << 0)
#define RESP_R2		(3 << 0)
#define RESP_R3		(4 << 0)
#define RESP_R4		(5 << 0)
#define RESP_R6		(6 << 0)
#define RESP_R7		(7 << 0)
/*command types 
 *bits:4~5
 */
#define CMD_MASK	(3 << 4)		/* command type */
#define CMD_AC		(0 << 4)
#define CMD_ADTC	(1 << 4)
#define CMD_BC		(2 << 4)
#define CMD_BCR		(3 << 4)

#define resp_type(cmd)	((cmd)->flags & RESP_MASK)

/*spi rsponse types 
 *bits:6~8
 */
#define RESP_SPI_MASK	(0x7 << 6)
#define RESP_SPI_R1	(1 << 6)
#define RESP_SPI_R1B	(2 << 6)
#define RESP_SPI_R2	(3 << 6)
#define RESP_SPI_R3	(4 << 6)
#define RESP_SPI_R4	(5 << 6)
#define RESP_SPI_R5	(6 << 6)
#define RESP_SPI_R7	(7 << 6)

#define spi_resp_type(cmd)	((cmd)->flags & RESP_SPI_MASK)
/*
 * These are the command types.
 */
#define cmd_type(cmd)	((cmd)->flags & CMD_MASK)
	
	rt_int32_t  err;

	struct rt_mmcsd_data *data;
};

struct rt_mmcsd_req {
	struct rt_mmcsd_data  *data;
	struct rt_mmcsd_cmd   *cmd;
	struct rt_mmcsd_cmd   *stop;
};

/*the following is response bit*/
#define R1_OUT_OF_RANGE		(1 << 31)	/* er, c */
#define R1_ADDRESS_ERROR	(1 << 30)	/* erx, c */
#define R1_BLOCK_LEN_ERROR	(1 << 29)	/* er, c */
#define R1_ERASE_SEQ_ERROR      (1 << 28)	/* er, c */
#define R1_ERASE_PARAM		(1 << 27)	/* ex, c */
#define R1_WP_VIOLATION		(1 << 26)	/* erx, c */
#define R1_CARD_IS_LOCKED	(1 << 25)	/* sx, a */
#define R1_LOCK_UNLOCK_FAILED	(1 << 24)	/* erx, c */
#define R1_COM_CRC_ERROR	(1 << 23)	/* er, b */
#define R1_ILLEGAL_COMMAND	(1 << 22)	/* er, b */
#define R1_CARD_ECC_FAILED	(1 << 21)	/* ex, c */
#define R1_CC_ERROR		(1 << 20)	/* erx, c */
#define R1_ERROR		(1 << 19)	/* erx, c */
#define R1_UNDERRUN		(1 << 18)	/* ex, c */
#define R1_OVERRUN		(1 << 17)	/* ex, c */
#define R1_CID_CSD_OVERWRITE	(1 << 16)	/* erx, c, CID/CSD overwrite */
#define R1_WP_ERASE_SKIP	(1 << 15)	/* sx, c */
#define R1_CARD_ECC_DISABLED	(1 << 14)	/* sx, a */
#define R1_ERASE_RESET		(1 << 13)	/* sr, c */
#define R1_STATUS(x)            (x & 0xFFFFE000)
#define R1_CURRENT_STATE(x)	((x & 0x00001E00) >> 9)	/* sx, b (4 bits) */
#define R1_READY_FOR_DATA	(1 << 8)	/* sx, a */
#define R1_APP_CMD		(1 << 5)	/* sr, c */


#define R1_SPI_IDLE		(1 << 0)
#define R1_SPI_ERASE_RESET	(1 << 1)
#define R1_SPI_ILLEGAL_COMMAND	(1 << 2)
#define R1_SPI_COM_CRC		(1 << 3)
#define R1_SPI_ERASE_SEQ	(1 << 4)
#define R1_SPI_ADDRESS		(1 << 5)
#define R1_SPI_PARAMETER	(1 << 6)
/* R1 bit 7 is always zero */
#define R2_SPI_CARD_LOCKED	(1 << 8)
#define R2_SPI_WP_ERASE_SKIP	(1 << 9)	/* or lock/unlock fail */
#define R2_SPI_LOCK_UNLOCK_FAIL	R2_SPI_WP_ERASE_SKIP
#define R2_SPI_ERROR		(1 << 10)
#define R2_SPI_CC_ERROR		(1 << 11)
#define R2_SPI_CARD_ECC_ERROR	(1 << 12)
#define R2_SPI_WP_VIOLATION	(1 << 13)
#define R2_SPI_ERASE_PARAM	(1 << 14)
#define R2_SPI_OUT_OF_RANGE	(1 << 15)	/* or CSD overwrite */
#define R2_SPI_CSD_OVERWRITE	R2_SPI_OUT_OF_RANGE

#define CARD_BUSY	0x80000000	/* Card Power up status bit */

/**
 * fls - find last (most-significant) bit set
 * @x: the word to search
 *
 * This is defined the same way as ffs.
 * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
 */

rt_inline rt_uint32_t fls(rt_uint32_t val)
{
	rt_uint32_t  bit = 32;

	if (!val)
		return 0;
	if (!(val & 0xffff0000u)) 
	{
		val <<= 16;
		bit -= 16;
	}
	if (!(val & 0xff000000u)) 
	{
		val <<= 8;
		bit -= 8;
	}
	if (!(val & 0xf0000000u)) 
	{
		val <<= 4;
		bit -= 4;
	}
	if (!(val & 0xc0000000u)) 
	{
		val <<= 2;
		bit -= 2;
	}
	if (!(val & 0x80000000u)) 
	{
		val <<= 1;
		bit -= 1;
	}

	return bit;
}

#if !defined(__GNUC__)
rt_inline rt_uint32_t ffs(rt_uint32_t x)
{
        int r = 1;

        if (!x)
                return 0;
        if (!(x & 0xffff)) {
                x >>= 16;
                r += 16;
        }
        if (!(x & 0xff)) {
                x >>= 8;
                r += 8;
        }
        if (!(x & 0xf)) {
                x >>= 4;
                r += 4;
        }
        if (!(x & 3)) {
                x >>= 2;
                r += 2;
        }
        if (!(x & 1)) {
                x >>= 1;
                r += 1;
        }
        return r;
}
#endif

void mmcsd_host_lock(struct rt_mmcsd_host *host);
void mmcsd_host_unlock(struct rt_mmcsd_host *host);
void mmcsd_req_complete(struct rt_mmcsd_host *host);
void mmcsd_send_request(struct rt_mmcsd_host *host, struct rt_mmcsd_req *req);
rt_int32_t mmcsd_send_cmd(struct rt_mmcsd_host *host, struct rt_mmcsd_cmd *cmd, int retries);
rt_int32_t mmcsd_go_idle(struct rt_mmcsd_host *host);
rt_int32_t mmcsd_spi_read_ocr(struct rt_mmcsd_host *host, rt_int32_t high_capacity, rt_uint32_t *ocr);
rt_int32_t mmcsd_all_get_cid(struct rt_mmcsd_host *host, rt_uint32_t *cid);
rt_int32_t mmcsd_get_cid(struct rt_mmcsd_host *host, rt_uint32_t *cid);
rt_int32_t mmcsd_get_csd(struct rt_mmcsd_card *card, rt_uint32_t *csd);
rt_int32_t mmcsd_select_card(struct rt_mmcsd_card *card);
rt_int32_t mmcsd_deselect_cards(struct rt_mmcsd_card *host);
rt_int32_t mmcsd_spi_use_crc(struct rt_mmcsd_host *host, rt_int32_t use_crc);
void mmcsd_set_chip_select(struct rt_mmcsd_host *host, rt_int32_t mode);
void mmcsd_set_clock(struct rt_mmcsd_host *host, rt_uint32_t clk);
void mmcsd_set_bus_mode(struct rt_mmcsd_host *host, rt_uint32_t mode);
void mmcsd_set_bus_width(struct rt_mmcsd_host *host, rt_uint32_t width);
void mmcsd_set_data_timeout(struct rt_mmcsd_data *data, const struct rt_mmcsd_card *card);
rt_uint32_t mmcsd_select_voltage(struct rt_mmcsd_host *host, rt_uint32_t ocr);
void mmcsd_change(struct rt_mmcsd_host *host);
void mmcsd_detect(void *param);
struct rt_mmcsd_host *mmcsd_alloc_host(void);
void mmcsd_free_host(struct rt_mmcsd_host *host);
void rt_mmcsd_core_init(void);

void rt_mmcsd_blk_init(void);
rt_int32_t rt_mmcsd_blk_probe(struct rt_mmcsd_card *card);
void rt_mmcsd_blk_remove(struct rt_mmcsd_card *card);


#ifdef __cplusplus
}
#endif

#endif