linux-imx

/*

 * AHCI glue platform driver for Marvell EBU SOCs

 *

 * Copyright (C) 2014 Marvell

 *

 * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

 * Marcin Wojtas <mw@semihalf.com>

 *

 * This file is licensed under the terms of the GNU General Public

 * License version 2.  This program is licensed "as is" without any

 * warranty of any kind, whether express or implied.

 */

​

#include <linux/ahci_platform.h>

#include <linux/kernel.h>

#include <linux/mbus.h>

#include <linux/module.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>

#include "ahci.h"

​

#define DRV_NAME "ahci-mvebu"

​

#define AHCI_VENDOR_SPECIFIC_0_ADDR  0xa0

#define AHCI_VENDOR_SPECIFIC_0_DATA  0xa4

​

#define AHCI_WINDOW_CTRL(win)   (0x60 + ((win) << 4))

#define AHCI_WINDOW_BASE(win)   (0x64 + ((win) << 4))

#define AHCI_WINDOW_SIZE(win)   (0x68 + ((win) << 4))

​

struct ahci_mvebu_plat_data {

    int (*plat_config)(struct ahci_host_priv *hpriv);

    unsigned int flags;

};

​

static void ahci_mvebu_mbus_config(struct ahci_host_priv *hpriv,

                   const struct mbus_dram_target_info *dram)

{

    int i;

​

    for (i = 0; i < 4; i++) {

        writel(0, hpriv->mmio + AHCI_WINDOW_CTRL(i));

        writel(0, hpriv->mmio + AHCI_WINDOW_BASE(i));

        writel(0, hpriv->mmio + AHCI_WINDOW_SIZE(i));

    }

​

    for (i = 0; i < dram->num_cs; i++) {

        const struct mbus_dram_window *cs = dram->cs + i;

​

        writel((cs->mbus_attr << 8) |

               (dram->mbus_dram_target_id << 4) | 1,

               hpriv->mmio + AHCI_WINDOW_CTRL(i));

        writel(cs->base >> 16, hpriv->mmio + AHCI_WINDOW_BASE(i));

        writel(((cs->size - 1) & 0xffff0000),

               hpriv->mmio + AHCI_WINDOW_SIZE(i));

    }

}

​

static void ahci_mvebu_regret_option(struct ahci_host_priv *hpriv)

{

    /*

     * Enable the regret bit to allow the SATA unit to regret a

     * request that didn't receive an acknowlegde and avoid a