1 files changed, 104 insertions, 19 deletions

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index e2c7edd206a6..bb269d0c677e 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -221,6 +221,7 @@ static struct {
         u32 hotkey:1;
         u32 hotkey_mask:1;
         u32 hotkey_wlsw:1;
+        u32 hotkey_tablet:1;
         u32 light:1;
         u32 light_status:1;
         u32 bright_16levels:1;
@@ -301,6 +302,13 @@ TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",	/* 600e/x, 770e, 770x */
            "HKEY",              /* all others */
            );                   /* 570 */
 
+TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
+           "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
+           "\\_SB.PCI0.VID0",   /* 770e */
+           "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
+           "\\_SB.PCI0.AGP.VID",        /* all others */
+           );                           /* R30, R31 */
+
 
 /*************************************************************************
  * ACPI helpers
@@ -1053,6 +1061,9 @@ static struct attribute_set *hotkey_dev_attributes;
 #define HOTKEY_CONFIG_CRITICAL_END
 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
 
+/* HKEY.MHKG() return bits */
+#define TP_HOTKEY_TABLET_MASK (1 << 3)
+
 static int hotkey_get_wlsw(int *status)
 {
         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
@@ -1060,6 +1071,16 @@ static int hotkey_get_wlsw(int *status)
         return 0;
 }
 
+static int hotkey_get_tablet_mode(int *status)
+{
+        int s;
+
+        if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
+                return -EIO;
+
+        return ((s & TP_HOTKEY_TABLET_MASK) != 0);
+}
+
 /*
  * Call with hotkey_mutex held
  */
@@ -1154,15 +1175,31 @@ static void tpacpi_input_send_radiosw(void)
 {
         int wlsw;
 
-        mutex_lock(&tpacpi_inputdev_send_mutex);
-
         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
+                mutex_lock(&tpacpi_inputdev_send_mutex);
+
                 input_report_switch(tpacpi_inputdev,
                                     SW_RADIO, !!wlsw);
                 input_sync(tpacpi_inputdev);
+
+                mutex_unlock(&tpacpi_inputdev_send_mutex);
         }
+}
+
+static void tpacpi_input_send_tabletsw(void)
+{
+        int state;
+
+        if (tp_features.hotkey_tablet &&
+            !hotkey_get_tablet_mode(&state)) {
+                mutex_lock(&tpacpi_inputdev_send_mutex);
 
-        mutex_unlock(&tpacpi_inputdev_send_mutex);
+                input_report_switch(tpacpi_inputdev,
+                                    SW_TABLET_MODE, !!state);
+                input_sync(tpacpi_inputdev);
+
+                mutex_unlock(&tpacpi_inputdev_send_mutex);
+        }
 }
 
 static void tpacpi_input_send_key(unsigned int scancode)
@@ -1417,6 +1454,14 @@ static void hotkey_poll_setup_safe(int may_warn)
         mutex_unlock(&hotkey_mutex);
 }
 
+#else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
+
+static void hotkey_poll_setup_safe(int __unused)
+{
+}
+
+#endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
+
 static int hotkey_inputdev_open(struct input_dev *dev)
 {
         switch (tpacpi_lifecycle) {
@@ -1444,7 +1489,6 @@ static void hotkey_inputdev_close(struct input_dev *dev)
         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
                 hotkey_poll_setup_safe(0);
 }
-#endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
 
 /* sysfs hotkey enable ------------------------------------------------- */
 static ssize_t hotkey_enable_show(struct device *dev,
@@ -1666,6 +1710,29 @@ static void hotkey_radio_sw_notify_change(void)
                              "hotkey_radio_sw");
 }
 
+/* sysfs hotkey tablet mode (pollable) --------------------------------- */
+static ssize_t hotkey_tablet_mode_show(struct device *dev,
+                           struct device_attribute *attr,
+                           char *buf)
+{
+        int res, s;
+        res = hotkey_get_tablet_mode(&s);
+        if (res < 0)
+                return res;
+
+        return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
+}
+
+static struct device_attribute dev_attr_hotkey_tablet_mode =
+        __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
+
+static void hotkey_tablet_mode_notify_change(void)
+{
+        if (tp_features.hotkey_tablet)
+                sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
+                             "hotkey_tablet_mode");
+}
+
 /* sysfs hotkey report_mode -------------------------------------------- */
 static ssize_t hotkey_report_mode_show(struct device *dev,
                            struct device_attribute *attr,
@@ -1878,7 +1945,7 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
                 str_supported(tp_features.hotkey));
 
         if (tp_features.hotkey) {
-                hotkey_dev_attributes = create_attr_set(12, NULL);
+                hotkey_dev_attributes = create_attr_set(13, NULL);
                 if (!hotkey_dev_attributes)
                         return -ENOMEM;
                 res = add_many_to_attr_set(hotkey_dev_attributes,
@@ -1957,6 +2024,18 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
                                         &dev_attr_hotkey_radio_sw.attr);
                 }
 
+                /* For X41t, X60t, X61t Tablets... */
+                if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
+                        tp_features.hotkey_tablet = 1;
+                        printk(TPACPI_INFO
+                                "possible tablet mode switch found; "
+                                "ThinkPad in %s mode\n",
+                                (status & TP_HOTKEY_TABLET_MASK)?
+                                        "tablet" : "laptop");
+                        res = add_to_attr_set(hotkey_dev_attributes,
+                                        &dev_attr_hotkey_tablet_mode.attr);
+                }
+
                 if (!res)
                         res = register_attr_set_with_sysfs(
                                         hotkey_dev_attributes,
@@ -2006,6 +2085,10 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
                         set_bit(EV_SW, tpacpi_inputdev->evbit);
                         set_bit(SW_RADIO, tpacpi_inputdev->swbit);
                 }
+                if (tp_features.hotkey_tablet) {
+                        set_bit(EV_SW, tpacpi_inputdev->evbit);
+                        set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
+                }
 
                 dbg_printk(TPACPI_DBG_INIT,
                                 "enabling hot key handling\n");
@@ -2023,12 +2106,12 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
                                 (hotkey_report_mode < 2) ?
                                         "enabled" : "disabled");
 
-#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
                 tpacpi_inputdev->open = &hotkey_inputdev_open;
                 tpacpi_inputdev->close = &hotkey_inputdev_close;
 
                 hotkey_poll_setup_safe(1);
-#endif
+                tpacpi_input_send_radiosw();
+                tpacpi_input_send_tabletsw();
         }
 
         return (tp_features.hotkey)? 0 : 1;
@@ -2156,11 +2239,15 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
                         /* 0x5000-0x5FFF: human interface helpers */
                         switch (hkey) {
                         case 0x5010: /* Lenovo new BIOS: brightness changed */
-                        case 0x5009: /* X61t: swivel up (tablet mode) */
-                        case 0x500a: /* X61t: swivel down (normal mode) */
                         case 0x500b: /* X61t: tablet pen inserted into bay */
                         case 0x500c: /* X61t: tablet pen removed from bay */
                                 break;
+                        case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
+                        case 0x500a: /* X41t-X61t: swivel down (normal mode) */
+                                tpacpi_input_send_tabletsw();
+                                hotkey_tablet_mode_notify_change();
+                                send_acpi_ev = 0;
+                                break;
                         case 0x5001:
                         case 0x5002:
                                 /* LID switch events.  Do not propagate */
@@ -2219,11 +2306,10 @@ static void hotkey_resume(void)
                        "from firmware\n");
         tpacpi_input_send_radiosw();
         hotkey_radio_sw_notify_change();
+        hotkey_tablet_mode_notify_change();
         hotkey_wakeup_reason_notify_change();
         hotkey_wakeup_hotunplug_complete_notify_change();
-#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
         hotkey_poll_setup_safe(0);
-#endif
 }
 
 /* procfs -------------------------------------------------------------- */
@@ -2676,6 +2762,8 @@ static struct ibm_struct wan_driver_data = {
  * Video subdriver
  */
 
+#ifdef CONFIG_THINKPAD_ACPI_VIDEO
+
 enum video_access_mode {
         TPACPI_VIDEO_NONE = 0,
         TPACPI_VIDEO_570,       /* 570 */
@@ -2703,13 +2791,6 @@ static int video_orig_autosw;
 static int video_autosw_get(void);
 static int video_autosw_set(int enable);
 
-TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
-           "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
-           "\\_SB.PCI0.VID0",   /* 770e */
-           "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
-           "\\_SB.PCI0.AGP.VID",        /* all others */
-           );                           /* R30, R31 */
-
 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
 
 static int __init video_init(struct ibm_init_struct *iibm)
@@ -3019,6 +3100,8 @@ static struct ibm_struct video_driver_data = {
         .exit = video_exit,
 };
 
+#endif /* CONFIG_THINKPAD_ACPI_VIDEO */
+
 /*************************************************************************
  * Light (thinklight) subdriver
  */
@@ -5803,10 +5886,12 @@ static struct ibm_init_struct ibms_init[] __initdata = {
                 .init = wan_init,
                 .data = &wan_driver_data,
         },
+#ifdef CONFIG_THINKPAD_ACPI_VIDEO
         {
                 .init = video_init,
                 .data = &video_driver_data,
         },
+#endif
         {
                 .init = light_init,
                 .data = &light_driver_data,
@@ -5918,7 +6003,7 @@ MODULE_PARM_DESC(hotkey_report_mode,
 
 #define TPACPI_PARAM(feature) \
         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
-        MODULE_PARM_DESC(feature, "Simulates thinkpad-aci procfs command " \
+        MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
                          "at module load, see documentation")
 
 TPACPI_PARAM(hotkey);