asus-laptop: clean write_status

Clean the write_status function, and implement special case with
a switch inside write_status. It also make sure bt and wl status
are right when booting with the hardware switch off.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 29 insertions, 19 deletions

diff --git a/drivers/misc/asus-laptop.c b/drivers/misc/asus-laptop.c
index dcab778a91c..3ba579899ac 100644
--- a/drivers/misc/asus-laptop.c
+++ b/drivers/misc/asus-laptop.c
@@ -272,19 +272,25 @@ static int read_status(int mask)
         return (hotk->status & mask) ? 1 : 0;
 }
 
-static void write_status(acpi_handle handle, int out, int mask, int invert)
+static void write_status(acpi_handle handle, int out, int mask)
 {
         hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask);
 
-        if (invert)             /* invert target value */
+        switch (mask) {
+        case MLED_ON:
                 out = !out & 0x1;
+                break;
+        default:
+                out &= 0x1;
+                break;
+        }
 
         if (handle && !write_acpi_int(handle, NULL, out, NULL))
-                printk(ASUS_WARNING " write failed\n");
+                printk(ASUS_WARNING " write failed %x\n", mask);
 }
 
 /* /sys/class/led handlers */
-#define ASUS_LED_HANDLER(object, mask, invert)                          \
+#define ASUS_LED_HANDLER(object, mask)                                  \
         static void object##_led_set(struct led_classdev *led_cdev,     \
                                      enum led_brightness value)         \
         {                                                               \
@@ -294,13 +300,13 @@ static void write_status(acpi_handle handle, int out, int mask, int invert)
         static void object##_led_update(struct work_struct *ignored)    \
         {                                                               \
                 int value = object##_led_wk;                            \
-                write_status(object##_set_handle, value, (mask), (invert)); \
+                write_status(object##_set_handle, value, (mask));       \
         }
 
-ASUS_LED_HANDLER(mled, MLED_ON, 1);
-ASUS_LED_HANDLER(pled, PLED_ON, 0);
-ASUS_LED_HANDLER(rled, RLED_ON, 0);
-ASUS_LED_HANDLER(tled, TLED_ON, 0);
+ASUS_LED_HANDLER(mled, MLED_ON);
+ASUS_LED_HANDLER(pled, PLED_ON);
+ASUS_LED_HANDLER(rled, RLED_ON);
+ASUS_LED_HANDLER(tled, TLED_ON);
 
 static int get_lcd_state(void)
 {
@@ -325,7 +331,7 @@ static int set_lcd_state(int value)
                         printk(ASUS_WARNING "Error switching LCD\n");
         }
 
-        write_status(NULL, lcd, LCD_ON, 0);
+        write_status(NULL, lcd, LCD_ON);
         return 0;
 }
 
@@ -458,7 +464,7 @@ static int parse_arg(const char *buf, unsigned long count, int *val)
 }
 
 static ssize_t store_status(const char *buf, size_t count,
-                            acpi_handle handle, int mask, int invert)
+                            acpi_handle handle, int mask)
 {
         int rv, value;
         int out = 0;
@@ -467,7 +473,7 @@ static ssize_t store_status(const char *buf, size_t count,
         if (rv > 0)
                 out = value ? 1 : 0;
 
-        write_status(handle, out, mask, invert);
+        write_status(handle, out, mask);
 
         return rv;
 }
@@ -508,7 +514,7 @@ static ssize_t show_wlan(struct device *dev,
 static ssize_t store_wlan(struct device *dev, struct device_attribute *attr,
                           const char *buf, size_t count)
 {
-        return store_status(buf, count, wl_switch_handle, WL_ON, 0);
+        return store_status(buf, count, wl_switch_handle, WL_ON);
 }
 
 /*
@@ -524,7 +530,7 @@ static ssize_t store_bluetooth(struct device *dev,
                                struct device_attribute *attr, const char *buf,
                                size_t count)
 {
-        return store_status(buf, count, bt_switch_handle, BT_ON, 0);
+        return store_status(buf, count, bt_switch_handle, BT_ON);
 }
 
 /*
@@ -652,10 +658,10 @@ static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
          * switched
          */
         if (event == ATKD_LCD_ON) {
-                write_status(NULL, 1, LCD_ON, 0);
+                write_status(NULL, 1, LCD_ON);
                 lcd_blank(FB_BLANK_UNBLANK);
         } else if (event == ATKD_LCD_OFF) {
-                write_status(NULL, 0, LCD_ON, 0);
+                write_status(NULL, 0, LCD_ON);
                 lcd_blank(FB_BLANK_POWERDOWN);
         }
 
@@ -928,11 +934,15 @@ static int asus_hotk_add(struct acpi_device *device)
         asus_hotk_found = 1;
 
         /* WLED and BLED are on by default */
-        write_status(bt_switch_handle, 1, BT_ON, 0);
-        write_status(wl_switch_handle, 1, WL_ON, 0);
+        write_status(bt_switch_handle, 1, BT_ON);
+        write_status(wl_switch_handle, 1, WL_ON);
+
+        /* If the h/w switch is off, we need to check the real status */
+        write_status(NULL, read_status(BT_ON), BT_ON);
+        write_status(NULL, read_status(WL_ON), WL_ON);
 
         /* LCD Backlight is on by default */
-        write_status(NULL, 1, LCD_ON, 0);
+        write_status(NULL, 1, LCD_ON);
 
         /* LED display is off by default */
         hotk->ledd_status = 0xFFF;