Toshiba laptops equiped with an illuminated keyboard
can operate in two different modes: Auto and FN-Z.
The Auto mode turns on the led on keystrokes and
automatically turns it off after some (configurable)
time the last key was pressed.
The FN-Z mode is used to toggle the keyboard led on/off
by userspace.
This patch adds support to set the desired KBD mode and
timeout via sysfs, creates and registers toshiba::kbd_backlight
led device whenever the mode is set to FN-Z.
The acceptable values for mode are: 1 (Auto) and 2 (Fn-Z)
The time values range are: 1-60 seconds
Signed-off-by: Azael Avalos <coproscefalo@xxxxxxxxx>
---
drivers/platform/x86/toshiba_acpi.c | 240 ++++++++++++++++++++++++++++++++++++
1 file changed, 240 insertions(+)
diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
index 6ed5be0..95ae1ff 100644
--- a/drivers/platform/x86/toshiba_acpi.c
+++ b/drivers/platform/x86/toshiba_acpi.c
@@ -111,7 +111,9 @@ MODULE_LICENSE("GPL");
#define HCI_HOTKEY_EVENT 0x001e
#define HCI_LCD_BRIGHTNESS 0x002a
#define HCI_WIRELESS 0x0056
+#define HCI_KBD_ILLUMINATION 0x0095
#define SCI_ILLUMINATION 0x014e
+#define SCI_KBD_ILLUM_STATUS 0x015c
/* field definitions */
#define HCI_HOTKEY_DISABLE 0x0b
@@ -119,6 +121,7 @@ MODULE_LICENSE("GPL");
#define HCI_LCD_BRIGHTNESS_BITS 3
#define HCI_LCD_BRIGHTNESS_SHIFT (16-HCI_LCD_BRIGHTNESS_BITS)
#define HCI_LCD_BRIGHTNESS_LEVELS (1 << HCI_LCD_BRIGHTNESS_BITS)
+#define HCI_MISC_SHIFT 0x10
#define HCI_VIDEO_OUT_LCD 0x1
#define HCI_VIDEO_OUT_CRT 0x2
#define HCI_VIDEO_OUT_TV 0x4
@@ -126,6 +129,8 @@ MODULE_LICENSE("GPL");
#define HCI_WIRELESS_BT_PRESENT 0x0f
#define HCI_WIRELESS_BT_ATTACH 0x40
#define HCI_WIRELESS_BT_POWER 0x80
+#define SCI_KBD_MODE_FNZ 0x1
+#define SCI_KBD_MODE_AUTO 0x2
struct toshiba_acpi_dev {
struct acpi_device *acpi_dev;
@@ -135,10 +140,13 @@ struct toshiba_acpi_dev {
struct work_struct hotkey_work;
struct backlight_device *backlight_dev;
struct led_classdev led_dev;
+ struct led_classdev kbd_led;
int force_fan;
int last_key_event;
int key_event_valid;
+ int kbd_mode;
+ int kbd_time;
unsigned int illumination_supported:1;
unsigned int video_supported:1;
@@ -147,6 +155,9 @@ struct toshiba_acpi_dev {
unsigned int ntfy_supported:1;
unsigned int info_supported:1;
unsigned int tr_backlight_supported:1;
+ unsigned int kbd_illum_supported:1;
+ unsigned int kbd_led_registered:1;
+ unsigned int sysfs_created:1;
struct mutex mutex;
};
@@ -433,6 +444,89 @@ static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev)
return state ? LED_FULL : LED_OFF;
}
+
+/* KBD Illumination */
+static int toshiba_kbd_illum_status_set(struct toshiba_acpi_dev *dev, u32 time)
+{
+ u32 result;
+ acpi_status status;
+
+ if (!sci_open(dev))
+ return -EIO;
+
+ status = sci_write(dev, SCI_KBD_ILLUM_STATUS, time, &result);
+ sci_close(dev);
+ if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
+ pr_err("ACPI call to set KBD backlight status failed\n");
+ return -EIO;
+ } else if (result == HCI_NOT_SUPPORTED) {
+ pr_info("Keyboard backlight status not supported\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static int toshiba_kbd_illum_status_get(struct toshiba_acpi_dev *dev, u32 *time)
+{
+ u32 result;
+ acpi_status status;
+
+ if (!sci_open(dev))
+ return -EIO;
+
+ status = sci_read(dev, SCI_KBD_ILLUM_STATUS, time, &result);
+ sci_close(dev);
+ if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
+ pr_err("ACPI call to get KBD backlight status failed\n");
+ return -EIO;
+ } else if (result == HCI_NOT_SUPPORTED) {
+ pr_info("Keyboard backlight status not supported\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static enum led_brightness toshiba_kbd_backlight_get(struct led_classdev *cdev)
+{
+ struct toshiba_acpi_dev *dev = container_of(cdev,
+ struct toshiba_acpi_dev, kbd_led);
+ u32 state, result;
+ acpi_status status;
+
+ /* Check the keyboard backlight state */
+ status = hci_read1(dev, HCI_KBD_ILLUMINATION, &state, &result);
+ if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
+ pr_err("ACPI call to get the keyboard backlight failed\n");
+ return LED_OFF;
+ } else if (result == HCI_NOT_SUPPORTED) {
+ pr_info("Keyboard backlight not supported\n");
+ return LED_OFF;
+ }
+
+ return state ? LED_FULL : LED_OFF;
+}
+
+static void toshiba_kbd_backlight_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct toshiba_acpi_dev *dev = container_of(cdev,
+ struct toshiba_acpi_dev, kbd_led);
+ u32 state, result;
+ acpi_status status;
+
+ /* Set the keyboard backlight state */
+ state = brightness ? 1 : 0;
+ status = hci_write1(dev, HCI_KBD_ILLUMINATION, state, &result);
+ if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
+ pr_err("ACPI call to set KBD Illumination mode failed\n");
+ return;
+ } else if (result == HCI_NOT_SUPPORTED) {
+ pr_info("Keyboard backlight not supported\n");
+ return;
+ }
+}
/* Bluetooth rfkill handlers */
@@ -956,6 +1050,117 @@ static const struct backlight_ops toshiba_backlight_data = {
.get_brightness = get_lcd_brightness,
.update_status = set_lcd_status,
};
+
+/*
+ * Sysfs files
+ */
+
+static ssize_t toshiba_kbd_bl_mode_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
+ int mode = -1;
+ int time = -1;
+
+ if (sscanf(buf, "%i", &mode) != 1 && (mode != 2 || mode != 1))
+ return -EINVAL;
+
+ /* Set the Keyboard Backlight Mode where:
+ * Mode - Auto (2) | FN-Z (1)
+ * Auto - KBD backlight turns off automatically in given time
+ * FN-Z - KBD backlight "toggles" when hotkey pressed
+ */
+ if (mode != -1 && toshiba->kbd_mode != mode) {
+ time = toshiba->kbd_time << HCI_MISC_SHIFT;
+ time = time + toshiba->kbd_mode;
+ if (toshiba_kbd_illum_status_set(toshiba, time) < 0)
+ return -EIO;
+ toshiba->kbd_mode = mode;
+ }
+
+ return count;
+}
+
+static ssize_t toshiba_kbd_bl_mode_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
+ u32 time;
+
+ if (toshiba_kbd_illum_status_get(toshiba, &time) < 0)
+ return -EIO;
+
+ return sprintf(buf, "%i\n", time & 0x07);
+}
+
+static ssize_t toshiba_kbd_bl_timeout_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
+ int time = -1;
+
+ if (sscanf(buf, "%i", &time) != 1 && (time < 0 || time > 60))
+ return -EINVAL;
+
+ /* Set the Keyboard Backlight Timeout: 0-60 seconds */
+ if (time != -1 && toshiba->kbd_time != time) {
+ time = time << HCI_MISC_SHIFT;
+ time = (toshiba->kbd_mode == SCI_KBD_MODE_AUTO) ?
+ time + 1 : time + 2;
+ if (toshiba_kbd_illum_status_set(toshiba, time) < 0)
+ return -EIO;
+ toshiba->kbd_time = time >> HCI_MISC_SHIFT;
+ }
+
+ return count;
+}
+
+static ssize_t toshiba_kbd_bl_timeout_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
+ u32 time;
+
+ if (toshiba_kbd_illum_status_get(toshiba, &time) < 0)
+ return -EIO;
+
+ return sprintf(buf, "%i\n", time >> HCI_MISC_SHIFT);
+}
+
+static DEVICE_ATTR(kbd_backlight_mode, S_IRUGO | S_IWUSR,
+ toshiba_kbd_bl_mode_show, toshiba_kbd_bl_mode_store);
+static DEVICE_ATTR(kbd_backlight_timeout, S_IRUGO | S_IWUSR,
+ toshiba_kbd_bl_timeout_show, toshiba_kbd_bl_timeout_store);
+
+static struct attribute *toshiba_attributes[] = {
+ &dev_attr_kbd_backlight_mode.attr,
+ &dev_attr_kbd_backlight_timeout.attr,
+ NULL,
+};
+
+static umode_t toshiba_sysfs_is_visible(struct kobject *kobj,
+ struct attribute *attr, int idx)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct toshiba_acpi_dev *drv = dev_get_drvdata(dev);
+ bool exists = true;
+
+ if (attr == &dev_attr_kbd_backlight_mode.attr)
+ exists = (drv->kbd_illum_supported) ? true : false;
+ else if (attr == &dev_attr_kbd_backlight_timeout.attr)
+ exists = (drv->kbd_mode == SCI_KBD_MODE_AUTO) ? true : false;
+
+ return exists ? attr->mode : 0;
+}
+
+static struct attribute_group toshiba_attr_group = {
+ .is_visible = toshiba_sysfs_is_visible,
+ .attrs = toshiba_attributes,
+};
static bool toshiba_acpi_i8042_filter(unsigned char data, unsigned char str,
struct serio *port)
@@ -1158,6 +1363,10 @@ static int toshiba_acpi_remove(struct acpi_device *acpi_dev)
struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
remove_toshiba_proc_entries(dev);
+
+ if (dev->sysfs_created)
+ sysfs_remove_group(&dev->acpi_dev->dev.kobj,
+ &toshiba_attr_group);
if (dev->ntfy_supported) {
i8042_remove_filter(toshiba_acpi_i8042_filter);
@@ -1179,6 +1388,9 @@ static int toshiba_acpi_remove(struct acpi_device *acpi_dev)
if (dev->illumination_supported)
led_classdev_unregister(&dev->led_dev);
+
+ if (dev->kbd_led_registered)
+ led_classdev_unregister(&dev->kbd_led);
if (toshiba_acpi)
toshiba_acpi = NULL;
@@ -1225,6 +1437,7 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev)
dev->acpi_dev = acpi_dev;
dev->method_hci = hci_method;
acpi_dev->driver_data = dev;
+ dev_set_drvdata(&acpi_dev->dev, dev);
if (toshiba_acpi_setup_keyboard(dev))
pr_info("Unable to activate hotkeys\n");
@@ -1264,6 +1477,25 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev)
if (!led_classdev_register(&acpi_dev->dev, &dev->led_dev))
dev->illumination_supported = 1;
}
+
+ ret = toshiba_kbd_illum_status_get(dev, &dummy);
+ if (!ret) {
+ dev->kbd_time = dummy >> HCI_MISC_SHIFT;
+ dev->kbd_mode = dummy & 0x07;
+ }
+ dev->kbd_illum_supported = !ret;
+ /*
+ * Only register the LED if KBD illumination is supported
+ * and the keyboard backlight operation mode is set to FN-Z
+ */
+ if (dev->kbd_illum_supported && dev->kbd_mode == SCI_KBD_MODE_FNZ) {
+ dev->kbd_led.name = "toshiba::kbd_backlight";
+ dev->kbd_led.max_brightness = 1;
+ dev->kbd_led.brightness_set = toshiba_kbd_backlight_set;
+ dev->kbd_led.brightness_get = toshiba_kbd_backlight_get;
+ if (!led_classdev_register(&dev->acpi_dev->dev, &dev->kbd_led))
+ dev->kbd_led_registered = 1;
+ }
/* Determine whether or not BIOS supports fan and video interfaces */
@@ -1273,6 +1505,14 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev)
ret = get_fan_status(dev, &dummy);
dev->fan_supported = !ret;
+ ret = sysfs_create_group(&dev->acpi_dev->dev.kobj,
+ &toshiba_attr_group);
+ if (ret) {
+ dev->sysfs_created = 0;
+ goto error;
+ }
+ dev->sysfs_created = !ret;
+
create_toshiba_proc_entries(dev);
toshiba_acpi = dev;
--
1.9.1
--
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