linux-imx

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

/* Realtek PCI-Express SD/MMC Card Interface driver

 *

 * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.

 *

 * Author:

 *   Wei WANG <wei_wang@realsil.com.cn>

 */

​

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/highmem.h>

#include <linux/delay.h>

#include <linux/platform_device.h>

#include <linux/workqueue.h>

#include <linux/mmc/host.h>

#include <linux/mmc/mmc.h>

#include <linux/mmc/sd.h>

#include <linux/mmc/sdio.h>

#include <linux/mmc/card.h>

#include <linux/rtsx_pci.h>

#include <asm/unaligned.h>

​

struct realtek_pci_sdmmc {

    struct platform_device  *pdev;

    struct rtsx_pcr     *pcr;

    struct mmc_host     *mmc;

    struct mmc_request  *mrq;

#define SDMMC_WORKQ_NAME    "rtsx_pci_sdmmc_workq"

​

    struct work_struct  work;

    struct mutex        host_mutex;

​

    u8          ssc_depth;

    unsigned int        clock;

    bool            vpclk;

    bool            double_clk;

    bool            eject;

    bool            initial_mode;

    int         power_state;

#define SDMMC_POWER_ON      1

#define SDMMC_POWER_OFF     0

​

    int         sg_count;

    s32         cookie;

    int         cookie_sg_count;

    bool            using_cookie;

};

​

static inline struct device *sdmmc_dev(struct realtek_pci_sdmmc *host)

{

    return &(host->pdev->dev);

}

​

static inline void sd_clear_error(struct realtek_pci_sdmmc *host)

{

    rtsx_pci_write_register(host->pcr, CARD_STOP,

            SD_STOP | SD_CLR_ERR, SD_STOP | SD_CLR_ERR);

}

​

#ifdef DEBUG

static void dump_reg_range(struct realtek_pci_sdmmc *host, u16 start, u16 end)

{

    u16 len = end - start + 1;

    int i;

    u8 data[8];

​

    for (i = 0; i < len; i += 8) {

        int j;

        int n = min(8, len - i);

​

        memset(&data, 0, sizeof(data));

        for (j = 0; j < n; j++)

            rtsx_pci_read_register(host->pcr, start + i + j,

                data + j);

        dev_dbg(sdmmc_dev(host), "0x%04X(%d): %8ph\n",

            start + i, n, data);

    }

}

​

static void sd_print_debug_regs(struct realtek_pci_sdmmc *host)

{

    dump_reg_range(host, 0xFDA0, 0xFDB3);

    dump_reg_range(host, 0xFD52, 0xFD69);

}

#else

#define sd_print_debug_regs(host)

#endif /* DEBUG */

​

static inline int sd_get_cd_int(struct realtek_pci_sdmmc *host)

{

    return rtsx_pci_readl(host->pcr, RTSX_BIPR) & SD_EXIST;