ACPI: thinkpad-acpi: export EV_SW SW_RADIO events

The expected user case for the radio slider switch on a ThinkPad includes
interfacing to applications, so that the user gets an offer to find and
associate with a wireless network when the switch is changed from disabled
to enabled (ThinkVantage suite).

Export the information about the switch state, and switch change events as
an EV_SW SW_RADIO event over the input layer.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Ivo van Doorn <ivdoorn@gmail.com>
Cc: Richard Hughes <hughsient@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 78914bf2166d..cfef218c4513 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -1014,6 +1014,11 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
                         }
                 }
 
+                if (tp_features.hotkey_wlsw) {
+                        set_bit(EV_SW, tpacpi_inputdev->evbit);
+                        set_bit(SW_RADIO, tpacpi_inputdev->swbit);
+                }
+
 #ifdef CONFIG_THINKPAD_ACPI_INPUT_ENABLED
                 dbg_printk(TPACPI_DBG_INIT,
                                 "enabling hot key handling\n");
@@ -1062,6 +1067,15 @@ static void tpacpi_input_send_key(unsigned int scancode,
         }
 }
 
+static void tpacpi_input_send_radiosw(void)
+{
+        int wlsw;
+
+        if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw))
+                input_report_switch(tpacpi_inputdev,
+                                    SW_RADIO, !!wlsw);
+}
+
 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 {
         u32 hkey;
@@ -1096,6 +1110,14 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
                                                 hkey);
                                 }
                                 break;
+                        case 7:
+                                /* 0x7000-0x7FFF: misc */
+                                if (tp_features.hotkey_wlsw && hkey == 0x7000) {
+                                                tpacpi_input_send_radiosw();
+                                                sendacpi = 0;
+                                        break;
+                                }
+                                /* fallthrough to default */
                         default:
                                 /* case 2: dock-related */
                                 /*      0x2305 - T43 waking up due to bay lever eject while aslept */
@@ -1113,6 +1135,11 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
         }
 }
 
+static void hotkey_resume(void)
+{
+        tpacpi_input_send_radiosw();
+}
+
 /*
  * Call with hotkey_mutex held
  */
@@ -1240,6 +1267,7 @@ static struct ibm_struct hotkey_driver_data = {
         .read = hotkey_read,
         .write = hotkey_write,
         .exit = hotkey_exit,
+        .resume = hotkey_resume,
         .acpi = &ibm_hotkey_acpidriver,
 };