linux-imx

// SPDX-License-Identifier: GPL-2.0-or-later

/*  linux/drivers/mmc/host/sdhci-pci.c - SDHCI on PCI bus interface

 *

 *  Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.

 *

 * Thanks to the following companies for their support:

 *

 *     - JMicron (hardware and technical support)

 */

​

#include <linux/bitfield.h>

#include <linux/string.h>

#include <linux/delay.h>

#include <linux/highmem.h>

#include <linux/module.h>

#include <linux/pci.h>

#include <linux/dma-mapping.h>

#include <linux/slab.h>

#include <linux/device.h>

#include <linux/mmc/host.h>

#include <linux/mmc/mmc.h>

#include <linux/scatterlist.h>

#include <linux/io.h>

#include <linux/gpio.h>

#include <linux/pm_runtime.h>

#include <linux/mmc/slot-gpio.h>

#include <linux/mmc/sdhci-pci-data.h>

#include <linux/acpi.h>

​

#ifdef CONFIG_X86

#include <asm/iosf_mbi.h>

#endif

​

#include "cqhci.h"

​

#include "sdhci.h"

#include "sdhci-pci.h"

​

static void sdhci_pci_hw_reset(struct sdhci_host *host);

​

#ifdef CONFIG_PM_SLEEP

static int sdhci_pci_init_wakeup(struct sdhci_pci_chip *chip)

{

    mmc_pm_flag_t pm_flags = 0;

    bool cap_cd_wake = false;

    int i;

​

    for (i = 0; i < chip->num_slots; i++) {

        struct sdhci_pci_slot *slot = chip->slots[i];

​

        if (slot) {

            pm_flags |= slot->host->mmc->pm_flags;

            if (slot->host->mmc->caps & MMC_CAP_CD_WAKE)

                cap_cd_wake = true;

        }

    }

​

    if ((pm_flags & MMC_PM_KEEP_POWER) && (pm_flags & MMC_PM_WAKE_SDIO_IRQ))

        return device_wakeup_enable(&chip->pdev->dev);

    else if (!cap_cd_wake)

        return device_wakeup_disable(&chip->pdev->dev);

​

    return 0;

}

​

static int sdhci_pci_suspend_host(struct sdhci_pci_chip *chip)

{

    int i, ret;

​

    sdhci_pci_init_wakeup(chip);

​

    for (i = 0; i < chip->num_slots; i++) {

        struct sdhci_pci_slot *slot = chip->slots[i];

        struct sdhci_host *host;

​

        if (!slot)

            continue;

​

        host = slot->host;

​

        if (chip->pm_retune && host->tuning_mode != SDHCI_TUNING_MODE_3)

            mmc_retune_needed(host->mmc);

​

        ret = sdhci_suspend_host(host);

        if (ret)

            goto err_pci_suspend;

​

        if (device_may_wakeup(&chip->pdev->dev))

            mmc_gpio_set_cd_wake(host->mmc, true);

    }

​

    return 0;