2 files changed, 91 insertions, 2 deletions

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 88e29074ac90..4326f536f849 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -65,9 +65,12 @@ config INPUT_COBALT_BTNS
 config INPUT_WISTRON_BTNS
         tristate "x86 Wistron laptop button interface"
         depends on X86 && !X86_64
+        select NEW_LEDS
+        select LEDS_CLASS
         help
           Say Y here for support of Winstron laptop button interface, used on
-          laptops of various brands, including Acer and Fujitsu-Siemens.
+          laptops of various brands, including Acer and Fujitsu-Siemens. If
+          available, mail and wifi leds will be controlable via /sys/class/leds.
 
           To compile this driver as a module, choose M here: the module will
           be called wistron_btns.
diff --git a/drivers/input/misc/wistron_btns.c b/drivers/input/misc/wistron_btns.c
index 320262aa4c17..d58ddcab601f 100644
--- a/drivers/input/misc/wistron_btns.c
+++ b/drivers/input/misc/wistron_btns.c
@@ -31,6 +31,7 @@
 #include <linux/timer.h>
 #include <linux/types.h>
 #include <linux/platform_device.h>
+#include <linux/leds.h>
 
 /*
  * Number of attempts to read data from queue per poll;
@@ -48,11 +49,12 @@
 /* BIOS subsystem IDs */
 #define WIFI            0x35
 #define BLUETOOTH       0x34
+#define MAIL_LED        0x31
 
 MODULE_AUTHOR("Miloslav Trmac <mitr@volny.cz>");
 MODULE_DESCRIPTION("Wistron laptop button driver");
 MODULE_LICENSE("GPL v2");
-MODULE_VERSION("0.2");
+MODULE_VERSION("0.3");
 
 static int force; /* = 0; */
 module_param(force, bool, 0);
@@ -253,6 +255,7 @@ enum { KE_END, KE_KEY, KE_SW, KE_WIFI, KE_BLUETOOTH };
 static const struct key_entry *keymap; /* = NULL; Current key map */
 static int have_wifi;
 static int have_bluetooth;
+static int have_leds;
 
 static int __init dmi_matched(struct dmi_system_id *dmi)
 {
@@ -265,6 +268,8 @@ static int __init dmi_matched(struct dmi_system_id *dmi)
                 else if (key->type == KE_BLUETOOTH)
                         have_bluetooth = 1;
         }
+        have_leds = key->code & (FE_MAIL_LED | FE_WIFI_LED);
+
         return 1;
 }
 
@@ -1030,6 +1035,83 @@ static void report_switch(unsigned code, int value)
         input_sync(input_dev);
 }
 
+
+ /* led management */
+static void wistron_mail_led_set(struct led_classdev *led_cdev,
+                                enum led_brightness value)
+{
+        bios_set_state(MAIL_LED, (value != LED_OFF) ? 1 : 0);
+}
+
+/* same as setting up wifi card, but for laptops on which the led is managed */
+static void wistron_wifi_led_set(struct led_classdev *led_cdev,
+                                enum led_brightness value)
+{
+        bios_set_state(WIFI, (value != LED_OFF) ? 1 : 0);
+}
+
+static struct led_classdev wistron_mail_led = {
+        .name                   = "mail:green",
+        .brightness_set         = wistron_mail_led_set,
+};
+
+static struct led_classdev wistron_wifi_led = {
+        .name                   = "wifi:red",
+        .brightness_set         = wistron_wifi_led_set,
+};
+
+static void __devinit wistron_led_init(struct device *parent)
+{
+        if (have_leds & FE_WIFI_LED) {
+                u16 wifi = bios_get_default_setting(WIFI);
+                if (wifi & 1) {
+                        wistron_wifi_led.brightness = (wifi & 2) ? LED_FULL : LED_OFF;
+                        if (led_classdev_register(parent, &wistron_wifi_led))
+                                have_leds &= ~FE_WIFI_LED;
+                        else
+                                bios_set_state(WIFI, wistron_wifi_led.brightness);
+
+                } else
+                        have_leds &= ~FE_WIFI_LED;
+        }
+
+        if (have_leds & FE_MAIL_LED) {
+                /* bios_get_default_setting(MAIL) always retuns 0, so just turn the led off */
+                wistron_mail_led.brightness = LED_OFF;
+                if (led_classdev_register(parent, &wistron_mail_led))
+                        have_leds &= ~FE_MAIL_LED;
+                else
+                        bios_set_state(MAIL_LED, wistron_mail_led.brightness);
+        }
+}
+
+static void __devexit wistron_led_remove(void)
+{
+        if (have_leds & FE_MAIL_LED)
+                led_classdev_unregister(&wistron_mail_led);
+
+        if (have_leds & FE_WIFI_LED)
+                led_classdev_unregister(&wistron_wifi_led);
+}
+
+static inline void wistron_led_suspend(void)
+{
+        if (have_leds & FE_MAIL_LED)
+                led_classdev_suspend(&wistron_mail_led);
+
+        if (have_leds & FE_WIFI_LED)
+                led_classdev_suspend(&wistron_wifi_led);
+}
+
+static inline void wistron_led_resume(void)
+{
+        if (have_leds & FE_MAIL_LED)
+                led_classdev_resume(&wistron_mail_led);
+
+        if (have_leds & FE_WIFI_LED)
+                led_classdev_resume(&wistron_wifi_led);
+}
+
  /* Driver core */
 
 static int wifi_enabled;
@@ -1135,6 +1217,7 @@ static int __devinit wistron_probe(struct platform_device *dev)
                         bios_set_state(BLUETOOTH, bluetooth_enabled);
         }
 
+        wistron_led_init(&dev->dev);
         poll_bios(1); /* Flush stale event queue and arm timer */
 
         return 0;
@@ -1143,6 +1226,7 @@ static int __devinit wistron_probe(struct platform_device *dev)
 static int __devexit wistron_remove(struct platform_device *dev)
 {
         del_timer_sync(&poll_timer);
+        wistron_led_remove();
         input_unregister_device(input_dev);
         bios_detach();
 
@@ -1160,6 +1244,7 @@ static int wistron_suspend(struct platform_device *dev, pm_message_t state)
         if (have_bluetooth)
                 bios_set_state(BLUETOOTH, 0);
 
+        wistron_led_suspend();
         return 0;
 }
 
@@ -1171,6 +1256,7 @@ static int wistron_resume(struct platform_device *dev)
         if (have_bluetooth)
                 bios_set_state(BLUETOOTH, bluetooth_enabled);
 
+        wistron_led_resume();
         poll_bios(1);
 
         return 0;