1 files changed, 60 insertions, 6 deletions

diff --git a/drivers/misc/asus-laptop.c b/drivers/misc/asus-laptop.c
index 65c32a95e121..4f9060a2a2f2 100644
--- a/drivers/misc/asus-laptop.c
+++ b/drivers/misc/asus-laptop.c
@@ -30,7 +30,7 @@
  *  Eric Burghard  - LED display support for W1N
  *  Josh Green     - Light Sens support
  *  Thomas Tuttle  - His first patch for led support was very helpfull
- *
+ *  Sam Lin        - GPS support
  */
 
 #include <linux/autoconf.h>
@@ -48,7 +48,7 @@
 #include <acpi/acpi_bus.h>
 #include <asm/uaccess.h>
 
-#define ASUS_LAPTOP_VERSION "0.41"
+#define ASUS_LAPTOP_VERSION "0.42"
 
 #define ASUS_HOTK_NAME          "Asus Laptop Support"
 #define ASUS_HOTK_CLASS         "hotkey"
@@ -83,6 +83,7 @@
 #define PLED_ON     0x20        //Phone LED
 #define GLED_ON     0x40        //Gaming LED
 #define LCD_ON      0x80        //LCD backlight
+#define GPS_ON      0x100       //GPS
 
 #define ASUS_LOG    ASUS_HOTK_FILE ": "
 #define ASUS_ERR    KERN_ERR    ASUS_LOG
@@ -148,7 +149,7 @@ ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP");
 ASUS_HANDLE(display_get, "\\_SB.PCI0.P0P1.VGA.GETD",    /*  A6B, A6K A6R A7D F3JM L4R M6R A3G
                                                            M6A M6V VX-1 V6J V6V W3Z */
             "\\_SB.PCI0.P0P2.VGA.GETD", /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V
-                                           S5A M5A z33A W1Jc W2V */
+                                           S5A M5A z33A W1Jc W2V G1 */
             "\\_SB.PCI0.P0P3.VGA.GETD", /* A6V A6Q */
             "\\_SB.PCI0.P0PA.VGA.GETD", /* A6T, A6M */
             "\\_SB.PCI0.PCI1.VGAC.NMAP",        /* L3C */
@@ -162,6 +163,12 @@ ASUS_HANDLE(display_get, "\\_SB.PCI0.P0P1.VGA.GETD",	/*  A6B, A6K A6R A7D F3JM L
 ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC");        /* Z71A Z71V */
 ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */
 
+/* GPS */
+/* R2H use different handle for GPS on/off */
+ASUS_HANDLE(gps_on, ASUS_HOTK_PREFIX "SDON");   /* R2H */
+ASUS_HANDLE(gps_off, ASUS_HOTK_PREFIX "SDOF");  /* R2H */
+ASUS_HANDLE(gps_status, ASUS_HOTK_PREFIX "GPST");
+
 /*
  * This is the main structure, we can use it to store anything interesting
  * about the hotk device
@@ -278,12 +285,28 @@ static int read_wireless_status(int mask)
         return (hotk->status & mask) ? 1 : 0;
 }
 
+static int read_gps_status(void)
+{
+        ulong status;
+        acpi_status rv = AE_OK;
+
+        rv = acpi_evaluate_integer(gps_status_handle, NULL, NULL, &status);
+        if (ACPI_FAILURE(rv))
+                printk(ASUS_WARNING "Error reading GPS status\n");
+        else
+                return status ? 1 : 0;
+
+        return (hotk->status & GPS_ON) ? 1 : 0;
+}
+
 /* Generic LED functions */
 static int read_status(int mask)
 {
         /* There is a special method for both wireless devices */
         if (mask == BT_ON || mask == WL_ON)
                 return read_wireless_status(mask);
+        else if (mask == GPS_ON)
+                return read_gps_status();
 
         return (hotk->status & mask) ? 1 : 0;
 }
@@ -299,6 +322,10 @@ static void write_status(acpi_handle handle, int out, int mask)
         case GLED_ON:
                 out = (out & 0x1) + 1;
                 break;
+        case GPS_ON:
+                handle = (out) ? gps_on_handle : gps_off_handle;
+                out = 0x02;
+                break;
         default:
                 out &= 0x1;
                 break;
@@ -667,6 +694,21 @@ static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr,
         return rv;
 }
 
+/*
+ * GPS
+ */
+static ssize_t show_gps(struct device *dev,
+                        struct device_attribute *attr, char *buf)
+{
+        return sprintf(buf, "%d\n", read_status(GPS_ON));
+}
+
+static ssize_t store_gps(struct device *dev, struct device_attribute *attr,
+                         const char *buf, size_t count)
+{
+        return store_status(buf, count, NULL, GPS_ON);
+}
+
 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
 {
         /* TODO Find a better way to handle events count. */
@@ -715,6 +757,7 @@ static ASUS_CREATE_DEVICE_ATTR(display);
 static ASUS_CREATE_DEVICE_ATTR(ledd);
 static ASUS_CREATE_DEVICE_ATTR(ls_switch);
 static ASUS_CREATE_DEVICE_ATTR(ls_level);
+static ASUS_CREATE_DEVICE_ATTR(gps);
 
 static struct attribute *asuspf_attributes[] = {
         &dev_attr_infos.attr,
@@ -724,6 +767,7 @@ static struct attribute *asuspf_attributes[] = {
         &dev_attr_ledd.attr,
         &dev_attr_ls_switch.attr,
         &dev_attr_ls_level.attr,
+        &dev_attr_gps.attr,
         NULL
 };
 
@@ -763,6 +807,9 @@ static void asus_hotk_add_fs(void)
                 ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl);
                 ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw);
         }
+
+        if (gps_status_handle && gps_on_handle && gps_off_handle)
+                ASUS_SET_DEVICE_ATTR(gps, 0644, show_gps, store_gps);
 }
 
 static int asus_handle_init(char *name, acpi_handle * handle,
@@ -890,9 +937,13 @@ static int asus_hotk_get_info(void)
 
         /* There is a lot of models with "ALSL", but a few get
            a real light sens, so we need to check it. */
-        if (ASUS_HANDLE_INIT(ls_switch))
+        if (!ASUS_HANDLE_INIT(ls_switch))
                 ASUS_HANDLE_INIT(ls_level);
 
+        ASUS_HANDLE_INIT(gps_on);
+        ASUS_HANDLE_INIT(gps_off);
+        ASUS_HANDLE_INIT(gps_status);
+
         kfree(model);
 
         return AE_OK;
@@ -950,7 +1001,7 @@ static int asus_hotk_add(struct acpi_device *device)
          * We install the handler, it will receive the hotk in parameter, so, we
          * could add other data to the hotk struct
          */
-        status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
+        status = acpi_install_notify_handler(hotk->handle, ACPI_ALL_NOTIFY,
                                              asus_hotk_notify, hotk);
         if (ACPI_FAILURE(status))
                 printk(ASUS_ERR "Error installing notify handler\n");
@@ -981,6 +1032,9 @@ static int asus_hotk_add(struct acpi_device *device)
         if (ls_level_handle)
                 set_light_sens_level(hotk->light_level);
 
+        /* GPS is on by default */
+        write_status(NULL, 1, GPS_ON);
+
       end:
         if (result) {
                 kfree(hotk->name);
@@ -997,7 +1051,7 @@ static int asus_hotk_remove(struct acpi_device *device, int type)
         if (!device || !acpi_driver_data(device))
                 return -EINVAL;
 
-        status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
+        status = acpi_remove_notify_handler(hotk->handle, ACPI_ALL_NOTIFY,
                                             asus_hotk_notify);
         if (ACPI_FAILURE(status))
                 printk(ASUS_ERR "Error removing notify handler\n");