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/*
* omaplfb-sysfs.c
*
* Copyright (C) 2011 Texas Instruments.
*
* 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.
*
* Author: Gustavo Diaz (gusdp@ti.com)
*
*/
#include <linux/version.h>
#include <linux/module.h>
#include <linux/sysfs.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/uaccess.h>
#include "img_defs.h"
#include "servicesext.h"
#include "kerneldisplay.h"
#include "omaplfb.h"
static ssize_t show_ignore_sync(OMAPLFB_DEVINFO *display_info, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", display_info->ignore_sync);
}
static ssize_t store_ignore_sync(OMAPLFB_DEVINFO *display_info,
const char *buf, size_t count)
{
unsigned long new_value;
if (strict_strtoul(buf, 10, &new_value))
return -EINVAL;
if (new_value == 0 || new_value == 1) {
display_info->ignore_sync = new_value;
return count;
}
return -EINVAL;
}
struct omaplfb_attribute {
struct attribute attr;
ssize_t (*show)(OMAPLFB_DEVINFO *, char *);
ssize_t (*store)(OMAPLFB_DEVINFO *, const char *, size_t);
};
static ssize_t omaplfb_attr_show(struct kobject *kobj, struct attribute *attr,
char *buf)
{
OMAPLFB_DEVINFO *display_info;
struct omaplfb_attribute *omaplfb_attr;
display_info = container_of(kobj, OMAPLFB_DEVINFO, kobj);
omaplfb_attr = container_of(attr, struct omaplfb_attribute, attr);
if (!omaplfb_attr->show)
return -ENOENT;
return omaplfb_attr->show(display_info, buf);
}
static ssize_t omaplfb_attr_store(struct kobject *kobj, struct attribute *attr,
const char *buf, size_t size)
{
OMAPLFB_DEVINFO *display_info;
struct omaplfb_attribute *omaplfb_attr;
display_info = container_of(kobj, OMAPLFB_DEVINFO, kobj);
omaplfb_attr = container_of(attr, struct omaplfb_attribute, attr);
if (!omaplfb_attr->store)
return -ENOENT;
return omaplfb_attr->store(display_info, buf, size);
}
#define OMAPLFB_ATTR(_name, _mode, _show, _store) \
struct omaplfb_attribute omaplfb_attr_##_name = \
__ATTR(_name, _mode, _show, _store)
static OMAPLFB_ATTR(ignore_sync, S_IRUGO|S_IWUSR, show_ignore_sync,
store_ignore_sync);
#undef OMAPLFB_ATTR
static struct attribute *omaplfb_sysfs_attrs[] = {
&omaplfb_attr_ignore_sync.attr,
NULL
};
static const struct sysfs_ops omaplfb_sysfs_ops = {
.show = omaplfb_attr_show,
.store = omaplfb_attr_store,
};
static struct kobj_type omaplfb_ktype = {
.sysfs_ops = &omaplfb_sysfs_ops,
.default_attrs = omaplfb_sysfs_attrs,
};
void omaplfb_create_sysfs(struct omaplfb_device *odev)
{
int i, r;
/* Create a sysfs entry for every display */
for (i = 0; i < odev->display_count; i++) {
OMAPLFB_DEVINFO *display_info = &odev->display_info_list[i];
r = kobject_init_and_add(&display_info->kobj, &omaplfb_ktype,
&odev->dev->kobj, "display%d",
display_info->uDeviceID);
if (r)
ERROR_PRINTK("failed to create sysfs file\n");
}
}
void omaplfb_remove_sysfs(struct omaplfb_device *odev)
{
int i;
for (i = 0; i < odev->display_count; i++) {
OMAPLFB_DEVINFO *display_info = &odev->display_info_list[i];
kobject_del(&display_info->kobj);
kobject_put(&display_info->kobj);
}
}
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