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Add sysfs interface for uw kbd bl color

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This commit is contained in:
Christoffer Sandberg 2020-08-20 15:51:16 +02:00
parent 9fc2f16482
commit e9e3c8b8e5
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GPG key ID: BF563F71B6C7A96D
1 changed files with 79 additions and 6 deletions
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85
src/uniwill_keyboard.h
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@ -38,9 +38,8 @@
#define UNIWILL_BRIGHTNESS_MIN 0x00
#define UNIWILL_BRIGHTNESS_MAX 0xc8
#define UNIWILL_BRIGHTNESS_DEFAULT UNIWILL_BRIGHTNESS_MAX * 0.75
#define UNIWILL_BRIGHTNESS_DEFAULT UNIWILL_BRIGHTNESS_MAX * 0.30
#define UNIWILL_COLOR_DEFAULT 0xffffff
#define UNIWILL_COLOR_STRING_DEFAULT "WHITE"
union uw_ec_read_return {
u32 dword;
@ -68,11 +67,9 @@ struct tuxedo_keyboard_driver uniwill_keyboard_driver;
struct kbd_led_state_uw_t {
u32 brightness;
u32 color;
char color_string[COLOR_STRING_LEN];
} kbd_led_state_uw = {
.brightness = UNIWILL_BRIGHTNESS_DEFAULT,
.color = UNIWILL_COLOR_DEFAULT,
.color_string = UNIWILL_COLOR_STRING_DEFAULT
};
static u8 uniwill_kbd_bl_enable_state_on_start;
@ -219,12 +216,12 @@ static void uniwill_write_kbd_bl_state(void) {
u32 brightness_percentage = (kbd_led_state_uw.brightness * 100) / UNIWILL_BRIGHTNESS_MAX;
// Scale color values
// Scale color values to valid range
color_red = (color_red * 0xc8) / 0xff;
color_green = (color_green * 0xc8) / 0xff;
color_blue = (color_blue * 0xc8) / 0xff;
// Scale the respective values
// Scale the respective color values with brightness
color_red = (color_red * brightness_percentage) / 100;
color_green = (color_green * brightness_percentage) / 100;
color_blue = (color_blue * brightness_percentage) / 100;
@ -314,6 +311,77 @@ static void uniwill_wmi_notify2(u32 value, void *context)
uniwill_wmi_handle_event(value, context, 2);
}
static ssize_t uw_brightness_show(struct device *child,
struct device_attribute *attr, char *buffer)
{
return sprintf(buffer, "%d\n", kbd_led_state_uw.brightness);
}
static ssize_t uw_brightness_store(struct device *child,
struct device_attribute *attr,
const char *buffer, size_t size)
{
u32 brightness_input;
int err = kstrtouint(buffer, 0, &brightness_input);
if (err) return err;
if (brightness_input > UNIWILL_BRIGHTNESS_MAX) return -EINVAL;
kbd_led_state_uw.brightness = (u8)brightness_input;
uniwill_write_kbd_bl_state();
return size;
}
static ssize_t uw_color_string_show(struct device *child,
struct device_attribute *attr, char *buffer)
{
int i;
sprintf(buffer, "Color values:");
for (i = 0; i < color_list.size; ++i) {
sprintf(buffer + strlen(buffer), " %s",
color_list.colors[i].name);
}
sprintf(buffer + strlen(buffer), "\n");
return strlen(buffer);
}
static ssize_t uw_color_string_store(struct device *child,
struct device_attribute *attr,
const char *buffer, size_t size)
{
u32 color_value;
char *buffer_copy;
buffer_copy = kmalloc(size + 1, GFP_KERNEL);
strcpy(buffer_copy, buffer);
color_value = color_lookup(&color_list, strstrip(buffer_copy));
kfree(buffer_copy);
if (color_value > 0xffffff) return -EINVAL;
kbd_led_state_uw.color = color_value;
uniwill_write_kbd_bl_state();
return size;
}
// Device attributes used by uw kbd
struct uw_kbd_dev_attrs_t {
struct device_attribute brightness;
struct device_attribute color_string;
} uw_kbd_dev_attrs = {
.brightness = __ATTR(brightness, 0644, uw_brightness_show, uw_brightness_store),
.color_string = __ATTR(color_string, 0644, uw_color_string_show, uw_color_string_store)
};
// Device attributes used for uw_kbd_bl_color
static struct attribute *uw_kbd_bl_color_attrs[] = {
&uw_kbd_dev_attrs.brightness.attr,
&uw_kbd_dev_attrs.color_string.attr,
NULL
};
static struct attribute_group uw_kbd_bl_color_attr_group = {
.name = "uw_kbd_bl_color",
.attrs = uw_kbd_bl_color_attrs
};
static int uniwill_keyboard_probe(struct platform_device *dev)
{
int status;
@ -370,6 +438,10 @@ static int uniwill_keyboard_probe(struct platform_device *dev)
// Update keyboard backlight according to the current state
uniwill_write_kbd_bl_state();
// Init sysfs bl attributes group
status = sysfs_create_group(&dev->dev.kobj, &uw_kbd_bl_color_attr_group);
if (status) TUXEDO_ERROR("Failed to create sysfs group\n");
}
// Enable keyboard backlight
@ -389,6 +461,7 @@ static int uniwill_keyboard_remove(struct platform_device *dev)
{
// Restore previous backlight enable state
if (uniwill_kbd_bl_enable_state_on_start != 0xff) {
sysfs_remove_group(&dev->dev.kobj, &uw_kbd_bl_color_attr_group);
uniwill_write_kbd_bl_enable(uniwill_kbd_bl_enable_state_on_start);
}