/* * 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/module.h> #include <linux/init.h> #include <linux/device.h> #include <linux/sysfs.h> #include <linux/efi-bgrt.h> 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 show_image(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 struct bin_attribute image_attr = { .attr = { .name = "image", .mode = S_IRUGO, }, .read = show_image, }; static struct attribute *bgrt_attributes[] = { &dev_attr_version.attr, &dev_attr_status.attr, &dev_attr_type.attr, &dev_attr_xoffset.attr, &dev_attr_yoffset.attr, NULL, }; static struct attribute_group bgrt_attribute_group = { .attrs = bgrt_attributes, }; static int __init bgrt_init(void) { int ret; if (!bgrt_image) return -ENODEV; sysfs_bin_attr_init(&image_attr); image_attr.private = bgrt_image; image_attr.size = bgrt_image_size; bgrt_kobj = kobject_create_and_add("bgrt", acpi_kobj); if (!bgrt_kobj) return -EINVAL; ret = sysfs_create_group(bgrt_kobj, &bgrt_attribute_group); if (ret) goto out_kobject; ret = sysfs_create_bin_file(bgrt_kobj, &image_attr); if (ret) goto out_group; return 0; out_group: sysfs_remove_group(bgrt_kobj, &bgrt_attribute_group); out_kobject: kobject_put(bgrt_kobj); return ret; } module_init(bgrt_init); MODULE_AUTHOR("Matthew Garrett, Josh Triplett <josh@joshtriplett.org>"); MODULE_DESCRIPTION("BGRT boot graphic support"); MODULE_LICENSE("GPL");