linux-imx

/*

 * MediaTek AHCI SATA driver

 *

 * Copyright (c) 2017 MediaTek Inc.

 * Author: Ryder Lee <ryder.lee@mediatek.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

​

#include <linux/ahci_platform.h>

#include <linux/kernel.h>

#include <linux/libata.h>

#include <linux/mfd/syscon.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/pm.h>

#include <linux/regmap.h>

#include <linux/reset.h>

#include "ahci.h"

​

#define DRV_NAME        "ahci-mtk"

​

#define SYS_CFG         0x14

#define SYS_CFG_SATA_MSK    GENMASK(31, 30)

#define SYS_CFG_SATA_EN     BIT(31)

​

struct mtk_ahci_plat {

    struct regmap *mode;

    struct reset_control *axi_rst;

    struct reset_control *sw_rst;

    struct reset_control *reg_rst;

};

​

static const struct ata_port_info ahci_port_info = {

    .flags      = AHCI_FLAG_COMMON,

    .pio_mask   = ATA_PIO4,

    .udma_mask  = ATA_UDMA6,

    .port_ops   = &ahci_platform_ops,

};

​

static struct scsi_host_template ahci_platform_sht = {

    AHCI_SHT(DRV_NAME),

};

​

static int mtk_ahci_platform_resets(struct ahci_host_priv *hpriv,

                    struct device *dev)

{

    struct mtk_ahci_plat *plat = hpriv->plat_data;

    int err;

​

    /* reset AXI bus and PHY part */

    plat->axi_rst = devm_reset_control_get_optional_exclusive(dev, "axi");

    if (PTR_ERR(plat->axi_rst) == -EPROBE_DEFER)

        return PTR_ERR(plat->axi_rst);

​

    plat->sw_rst = devm_reset_control_get_optional_exclusive(dev, "sw");