linux-imx

/*

 * TI AMx3 Wakeup M3 Remote Processor driver

 *

 * Copyright (C) 2014-2015 Texas Instruments, Inc.

 *

 * Dave Gerlach <d-gerlach@ti.com>

 * Suman Anna <s-anna@ti.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/err.h>

#include <linux/interrupt.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/of_device.h>

#include <linux/of_address.h>

#include <linux/platform_device.h>

#include <linux/pm_runtime.h>

#include <linux/remoteproc.h>

​

#include <linux/platform_data/wkup_m3.h>

​

#include "remoteproc_internal.h"

​

#define WKUPM3_MEM_MAX  2

​

/**

 * struct wkup_m3_mem - WkupM3 internal memory structure

 * @cpu_addr: MPU virtual address of the memory region

 * @bus_addr: Bus address used to access the memory region

 * @dev_addr: Device address from Wakeup M3 view

 * @size: Size of the memory region

 */

struct wkup_m3_mem {

    void __iomem *cpu_addr;

    phys_addr_t bus_addr;

    u32 dev_addr;

    size_t size;

};

​

/**

 * struct wkup_m3_rproc - WkupM3 remote processor state

 * @rproc: rproc handle

 * @pdev: pointer to platform device

 * @mem: WkupM3 memory information

 */

struct wkup_m3_rproc {

    struct rproc *rproc;

    struct platform_device *pdev;

    struct wkup_m3_mem mem[WKUPM3_MEM_MAX];

};

​

static int wkup_m3_rproc_start(struct rproc *rproc)

{

    struct wkup_m3_rproc *wkupm3 = rproc->priv;

    struct platform_device *pdev = wkupm3->pdev;

    struct device *dev = &pdev->dev;

    struct wkup_m3_platform_data *pdata = dev_get_platdata(dev);

​

    if (pdata->deassert_reset(pdev, pdata->reset_name)) {

        dev_err(dev, "Unable to reset wkup_m3!\n");

        return -ENODEV;

    }

​

    return 0;

}

​

static int wkup_m3_rproc_stop(struct rproc *rproc)

{

    struct wkup_m3_rproc *wkupm3 = rproc->priv;

    struct platform_device *pdev = wkupm3->pdev;

    struct device *dev = &pdev->dev;

    struct wkup_m3_platform_data *pdata = dev_get_platdata(dev);

​

    if (pdata->assert_reset(pdev, pdata->reset_name)) {

        dev_err(dev, "Unable to assert reset of wkup_m3!\n");

        return -ENODEV;

    }

​

    return 0;

}

​

static void *wkup_m3_rproc_da_to_va(struct rproc *rproc, u64 da, int len)

{