uboot-phytec

// SPDX-License-Identifier: GPL-2.0

/*

 * drivers/mmc/sh_sdhi.c

 *

 * SD/MMC driver for Renesas rmobile ARM SoCs.

 *

 * Copyright (C) 2011,2013-2017 Renesas Electronics Corporation

 * Copyright (C) 2014 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>

 * Copyright (C) 2008-2009 Renesas Solutions Corp.

 */

​

#include <common.h>

#include <malloc.h>

#include <mmc.h>

#include <dm.h>

#include <linux/errno.h>

#include <linux/compat.h>

#include <linux/io.h>

#include <linux/sizes.h>

#include <asm/arch/rmobile.h>

#include <asm/arch/sh_sdhi.h>

#include <clk.h>

​

#define DRIVER_NAME "sh-sdhi"

​

struct sh_sdhi_host {

    void __iomem *addr;

    int ch;

    int bus_shift;

    unsigned long quirks;

    unsigned char wait_int;

    unsigned char sd_error;

    unsigned char detect_waiting;

    unsigned char app_cmd;

};

​

static inline void sh_sdhi_writeq(struct sh_sdhi_host *host, int reg, u64 val)

{

    writeq(val, host->addr + (reg << host->bus_shift));

}

​

static inline u64 sh_sdhi_readq(struct sh_sdhi_host *host, int reg)

{

    return readq(host->addr + (reg << host->bus_shift));

}

​

static inline void sh_sdhi_writew(struct sh_sdhi_host *host, int reg, u16 val)

{

    writew(val, host->addr + (reg << host->bus_shift));

}

​

static inline u16 sh_sdhi_readw(struct sh_sdhi_host *host, int reg)

{

    return readw(host->addr + (reg << host->bus_shift));

}

​

static void sh_sdhi_detect(struct sh_sdhi_host *host)

{

    sh_sdhi_writew(host, SDHI_OPTION,

               OPT_BUS_WIDTH_1 | sh_sdhi_readw(host, SDHI_OPTION));

​

    host->detect_waiting = 0;

}

​

static int sh_sdhi_intr(void *dev_id)

{

    struct sh_sdhi_host *host = dev_id;

    int state1 = 0, state2 = 0;

​

    state1 = sh_sdhi_readw(host, SDHI_INFO1);

    state2 = sh_sdhi_readw(host, SDHI_INFO2);

​

    debug("%s: state1 = %x, state2 = %x\n", __func__, state1, state2);

​

    /* CARD Insert */

    if (state1 & INFO1_CARD_IN) {

        sh_sdhi_writew(host, SDHI_INFO1, ~INFO1_CARD_IN);

        if (!host->detect_waiting) {

            host->detect_waiting = 1;

            sh_sdhi_detect(host);

        }

        sh_sdhi_writew(host, SDHI_INFO1_MASK, INFO1M_RESP_END |

                   INFO1M_ACCESS_END | INFO1M_CARD_IN |

                   INFO1M_DATA3_CARD_RE | INFO1M_DATA3_CARD_IN);

        return -EAGAIN;

    }

    /* CARD Removal */

    if (state1 & INFO1_CARD_RE) {

        sh_sdhi_writew(host, SDHI_INFO1, ~INFO1_CARD_RE);

        if (!host->detect_waiting) {

            host->detect_waiting = 1;

            sh_sdhi_detect(host);