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#include <kprobe/dbi_kprobes.h>
#include <linux/backlight.h>
#include "lcd_base.h"
static const char path_backlight[] = "/sys/class/backlight/s6e8aa0-bl/brightness";
static const char path_backlight_max[] = "/sys/class/backlight/s6e8aa0-bl/max_brightness";
static const char path_power[] = "/sys/class/lcd/s6e8aa0/lcd_power";
static const char *all_path[] = {
path_backlight,
path_backlight_max,
path_power
};
enum {
all_path_cnt = sizeof(all_path) / sizeof(char *)
};
static int s6e8aa0_check(struct lcd_ops *ops)
{
int i;
for (i = 0; i < all_path_cnt; ++i) {
int ret = read_val(all_path[i]);
if (IS_ERR_VALUE(ret))
return 0;
}
return 1;
}
static unsigned long s6e8aa0_get_parameter(struct lcd_ops *ops,
enum lcd_parameter_type type)
{
switch (type) {
case LPD_MIN_BRIGHTNESS:
return 0;
case LPD_MAX_BRIGHTNESS:
return read_val(path_backlight_max);
case LPD_BRIGHTNESS:
return read_val(path_backlight);
case LPD_POWER:
return read_val(path_power);
}
return -EINVAL;
}
static int entry_handler_set_power(struct kretprobe_instance *ri,
struct pt_regs *regs);
static int ret_handler_set_power(struct kretprobe_instance *ri,
struct pt_regs *regs);
static struct kretprobe set_power_krp = {
.kp.symbol_name = "s6e8aa0_set_power",
.entry_handler = entry_handler_set_power,
.handler = ret_handler_set_power,
.data_size = sizeof(int)
};
static int entry_handler_set_backlight(struct kretprobe_instance *ri,
struct pt_regs *regs);
static int ret_handler_set_backlight(struct kretprobe_instance *ri,
struct pt_regs *regs);
static struct kretprobe set_backlight_krp = {
.kp.symbol_name = "s6e8aa0_update_status",
.entry_handler = entry_handler_set_backlight,
.handler = ret_handler_set_backlight,
.data_size = sizeof(int)
};
int s6e8aa0_set(struct lcd_ops *ops)
{
int ret;
ret = dbi_register_kretprobe(&set_power_krp);
if (ret)
return ret;
ret = dbi_register_kretprobe(&set_backlight_krp);
if (ret)
dbi_unregister_kretprobe(&set_power_krp);
return ret;
}
int s6e8aa0_unset(struct lcd_ops *ops)
{
dbi_unregister_kretprobe(&set_backlight_krp);
dbi_unregister_kretprobe(&set_power_krp);
return 0;
}
static struct lcd_ops s6e8aa0_ops = {
.name = "s6e8aa0_panel",
.check = s6e8aa0_check,
.set = s6e8aa0_set,
.unset = s6e8aa0_unset,
.get = s6e8aa0_get_parameter
};
struct lcd_ops *LCD_MAKE_FNAME(s6e8aa0_panel)(void)
{
return &s6e8aa0_ops;
}
/* ============================================================================
* === POWER ===
* ============================================================================
*/
static int entry_handler_set_power(struct kretprobe_instance *ri,
struct pt_regs *regs)
{
int *power = (int *)ri->data;
*power = (int)swap_get_karg(regs, 1);
return 0;
}
static int ret_handler_set_power(struct kretprobe_instance *ri,
struct pt_regs *regs)
{
int ret = regs_return_value(regs);
int *power = (int *)ri->data;
if (!ret && s6e8aa0_ops.notifier)
s6e8aa0_ops.notifier(&s6e8aa0_ops, LAT_POWER,
(void *)*power);
return 0;
}
/* ============================================================================
* === BACKLIGHT ===
* ============================================================================
*/
static int entry_handler_set_backlight(struct kretprobe_instance *ri,
struct pt_regs *regs)
{
int *brightness = (int *)ri->data;
struct backlight_device *bd;
bd = (struct backlight_device *)swap_get_karg(regs, 0);
*brightness = bd->props.brightness;
return 0;
}
static int ret_handler_set_backlight(struct kretprobe_instance *ri,
struct pt_regs *regs)
{
int ret = regs_return_value(regs);
int *brightness = (int *)ri->data;
if (!ret && s6e8aa0_ops.notifier)
s6e8aa0_ops.notifier(&s6e8aa0_ops, LAT_BRIGHTNESS,
(void *)*brightness);
return 0;
}
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