linux-imx

/*

 * BGRT boot graphic support

 * Authors: Matthew Garrett, Josh Triplett <josh@joshtriplett.org>

 * Copyright 2012 Red Hat, Inc <mjg@redhat.com>

 * Copyright 2012 Intel Corporation

 *

 * 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.

 */

​

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/device.h>

#include <linux/sysfs.h>

#include <linux/efi-bgrt.h>

​

static void *bgrt_image;

static struct kobject *bgrt_kobj;

​

static ssize_t show_version(struct device *dev,

                struct device_attribute *attr, char *buf)

{

    return snprintf(buf, PAGE_SIZE, "%d\n", bgrt_tab.version);

}

static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);

​

static ssize_t show_status(struct device *dev,

               struct device_attribute *attr, char *buf)

{

    return snprintf(buf, PAGE_SIZE, "%d\n", bgrt_tab.status);

}

static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);

​

static ssize_t show_type(struct device *dev,

             struct device_attribute *attr, char *buf)

{

    return snprintf(buf, PAGE_SIZE, "%d\n", bgrt_tab.image_type);

}

static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);

​

static ssize_t show_xoffset(struct device *dev,

                struct device_attribute *attr, char *buf)

{

    return snprintf(buf, PAGE_SIZE, "%d\n", bgrt_tab.image_offset_x);

}

static DEVICE_ATTR(xoffset, S_IRUGO, show_xoffset, NULL);

​

static ssize_t show_yoffset(struct device *dev,

                struct device_attribute *attr, char *buf)

{

    return snprintf(buf, PAGE_SIZE, "%d\n", bgrt_tab.image_offset_y);

}

static DEVICE_ATTR(yoffset, S_IRUGO, show_yoffset, NULL);

​

static ssize_t image_read(struct file *file, struct kobject *kobj,

           struct bin_attribute *attr, char *buf, loff_t off, size_t count)

{

    memcpy(buf, attr->private + off, count);

    return count;

}

​

static BIN_ATTR_RO(image, 0);   /* size gets filled in later */