thinkpad_acpi: Add support for more adaptive kbd buttons

This commit adds new elements to the ThinkPad keymaps, and
will send key events for keys for which an input.h declaration
exists.

Signed-off-by: Bastien Nocera <hadess@hadess.net>
Reviewed-by: Henrique de Moraes Holschuh <hmh@hyymh.eng.br>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>

drivers/platform/x86/thinkpad_acpi.c

@@ -1912,6 +1912,27 @@ enum {	/* hot key scan codes (derived from ACPI DSDT) */
 	TP_ACPI_HOTKEYSCAN_UNK7,
 	TP_ACPI_HOTKEYSCAN_UNK8,
 
+	TP_ACPI_HOTKEYSCAN_MUTE2,
+	TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO,
+	TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL,
+	TP_ACPI_HOTKEYSCAN_CLOUD,
+	TP_ACPI_HOTKEYSCAN_UNK9,
+	TP_ACPI_HOTKEYSCAN_VOICE,
+	TP_ACPI_HOTKEYSCAN_UNK10,
+	TP_ACPI_HOTKEYSCAN_GESTURES,
+	TP_ACPI_HOTKEYSCAN_UNK11,
+	TP_ACPI_HOTKEYSCAN_UNK12,
+	TP_ACPI_HOTKEYSCAN_UNK13,
+	TP_ACPI_HOTKEYSCAN_CONFIG,
+	TP_ACPI_HOTKEYSCAN_NEW_TAB,
+	TP_ACPI_HOTKEYSCAN_RELOAD,
+	TP_ACPI_HOTKEYSCAN_BACK,
+	TP_ACPI_HOTKEYSCAN_MIC_DOWN,
+	TP_ACPI_HOTKEYSCAN_MIC_UP,
+	TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION,
+	TP_ACPI_HOTKEYSCAN_CAMERA_MODE,
+	TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY,
+
 	/* Hotkey keymap size */
 	TPACPI_HOTKEY_MAP_LEN
 };
@@ -3170,6 +3191,13 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 		/* (assignments unknown, please report if found) */
 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
+
+		/* No assignments, only used for Adaptive keyboards. */
+		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
+		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
+		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
+		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
+		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
 		},
 
 	/* Generic keymap for Lenovo ThinkPads */
@@ -3226,6 +3254,35 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 
 		/* Extra keys in use since the X240 / T440 / T540 */
 		KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE,
+
+		/*
+		 * These are the adaptive keyboard keycodes for Carbon X1 2014.
+		 * The first item in this list is the Mute button which is
+		 * emitted with 0x103 through
+		 * adaptive_keyboard_hotkey_notify_hotkey() when the sound
+		 * symbol is held.
+		 * We'll need to offset those by 0x20.
+		 */
+		KEY_RESERVED,        /* Mute held, 0x103 */
+		KEY_BRIGHTNESS_MIN,  /* Backlight off */
+		KEY_RESERVED,        /* Clipping tool */
+		KEY_RESERVED,        /* Cloud */
+		KEY_RESERVED,
+		KEY_VOICECOMMAND,    /* Voice */
+		KEY_RESERVED,
+		KEY_RESERVED,        /* Gestures */
+		KEY_RESERVED,
+		KEY_RESERVED,
+		KEY_RESERVED,
+		KEY_CONFIG,          /* Settings */
+		KEY_RESERVED,        /* New tab */
+		KEY_REFRESH,         /* Reload */
+		KEY_BACK,            /* Back */
+		KEY_RESERVED,        /* Microphone down */
+		KEY_RESERVED,        /* Microphone up */
+		KEY_RESERVED,        /* Microphone cancellation */
+		KEY_RESERVED,        /* Camera mode */
+		KEY_RESERVED,        /* Rotate display, 0x116 */
 		},
 	};
 
@@ -3527,6 +3584,8 @@ static const int adaptive_keyboard_modes[] = {
 
 #define DFR_CHANGE_ROW			0x101
 #define DFR_SHOW_QUICKVIEW_ROW		0x102
+#define FIRST_ADAPTIVE_KEY		0x103
+#define ADAPTIVE_KEY_OFFSET		0x020
 
 /* press Fn key a while second, it will switch to Function Mode. Then
  * release Fn key, previous mode be restored.
@@ -3582,6 +3641,7 @@ static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
 {
 	u32 current_mode = 0;
 	int new_mode = 0;
+	int keycode;
 
 	switch (scancode) {
 	case DFR_CHANGE_ROW:
@@ -3614,7 +3674,25 @@ static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
 		return true;
 
 	default:
-		return false;
+		if (scancode < FIRST_ADAPTIVE_KEY || scancode > FIRST_ADAPTIVE_KEY +
+				TPACPI_HOTKEY_MAP_LEN - ADAPTIVE_KEY_OFFSET) {
+			pr_info("Unhandled adaptive keyboard key: 0x%x\n",
+					scancode);
+			return false;
+		}
+		keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + ADAPTIVE_KEY_OFFSET];
+		if (keycode != KEY_RESERVED) {
+			mutex_lock(&tpacpi_inputdev_send_mutex);
+
+			input_report_key(tpacpi_inputdev, keycode, 1);
+			input_sync(tpacpi_inputdev);
+
+			input_report_key(tpacpi_inputdev, keycode, 0);
+			input_sync(tpacpi_inputdev);
+
+			mutex_unlock(&tpacpi_inputdev_send_mutex);
+		}
+		return true;
 	}
 }