Input: atmel_mxt_ts - read and report bootloader version

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Acked-by: Benson Leung <bleung@chromium.org>
Acked-by: Yufeng Shen <miletus@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/atmel_mxt_ts.c

@@ -198,6 +198,8 @@
 #define MXT_FRAME_CRC_PASS	0x04
 #define MXT_APP_CRC_FAIL	0x40	/* valid 7 8 bit only */
 #define MXT_BOOT_STATUS_MASK	0x3f
+#define MXT_BOOT_EXTENDED_ID	(1 << 5)
+#define MXT_BOOT_ID_MASK	0x1f
 
 /* Touch status */
 #define MXT_UNGRIP		(1 << 0)
@@ -446,6 +448,27 @@ static int mxt_lookup_bootloader_address(struct mxt_data *data)
 	return 0;
 }
 
+static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val)
+{
+	struct device *dev = &data->client->dev;
+	u8 buf[3];
+
+	if (val & MXT_BOOT_EXTENDED_ID) {
+		if (mxt_bootloader_read(data, &buf[0], 3) != 0) {
+			dev_err(dev, "%s: i2c failure\n", __func__);
+			return -EIO;
+		}
+
+		dev_dbg(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]);
+
+		return buf[0];
+	} else {
+		dev_dbg(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK);
+
+		return val;
+	}
+}
+
 static int mxt_check_bootloader(struct mxt_data *data, unsigned int state)
 {
 	struct device *dev = &data->client->dev;
@@ -478,6 +501,9 @@ recheck:
 	if (ret)
 		return ret;
 
+	if (state == MXT_WAITING_BOOTLOAD_CMD)
+		val = mxt_get_bootloader_version(data, val);
+
 	switch (state) {
 	case MXT_WAITING_BOOTLOAD_CMD:
 	case MXT_WAITING_FRAME_DATA: