Fixed MTP to work with TWRP

drivers/nfc/microread/mei.c

@@ -0,0 +1,109 @@
+/*
+ * HCI based Driver for Inside Secure microread NFC Chip
+ *
+ * Copyright (C) 2013  Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/nfc.h>
+#include <net/nfc/hci.h>
+#include <net/nfc/llc.h>
+
+#include "../mei_phy.h"
+#include "microread.h"
+
+#define MICROREAD_DRIVER_NAME "microread"
+
+static int microread_mei_probe(struct mei_cl_device *device,
+			       const struct mei_cl_device_id *id)
+{
+	struct nfc_mei_phy *phy;
+	int r;
+
+	pr_info("Probing NFC microread\n");
+
+	phy = nfc_mei_phy_alloc(device);
+	if (!phy) {
+		pr_err("Cannot allocate memory for microread mei phy.\n");
+		return -ENOMEM;
+	}
+
+	r = microread_probe(phy, &mei_phy_ops, LLC_NOP_NAME,
+			    MEI_NFC_HEADER_SIZE, 0, MEI_NFC_MAX_HCI_PAYLOAD,
+			    &phy->hdev);
+	if (r < 0) {
+		nfc_mei_phy_free(phy);
+
+		return r;
+	}
+
+	return 0;
+}
+
+static int microread_mei_remove(struct mei_cl_device *device)
+{
+	struct nfc_mei_phy *phy = mei_cl_get_drvdata(device);
+
+	microread_remove(phy->hdev);
+
+	nfc_mei_phy_free(phy);
+
+	return 0;
+}
+
+static struct mei_cl_device_id microread_mei_tbl[] = {
+	{ MICROREAD_DRIVER_NAME },
+
+	/* required last entry */
+	{ }
+};
+MODULE_DEVICE_TABLE(mei, microread_mei_tbl);
+
+static struct mei_cl_driver microread_driver = {
+	.id_table = microread_mei_tbl,
+	.name = MICROREAD_DRIVER_NAME,
+
+	.probe = microread_mei_probe,
+	.remove = microread_mei_remove,
+};
+
+static int microread_mei_init(void)
+{
+	int r;
+
+	pr_debug(DRIVER_DESC ": %s\n", __func__);
+
+	r = mei_cl_driver_register(&microread_driver);
+	if (r) {
+		pr_err(MICROREAD_DRIVER_NAME ": driver registration failed\n");
+		return r;
+	}
+
+	return 0;
+}
+
+static void microread_mei_exit(void)
+{
+	mei_cl_driver_unregister(&microread_driver);
+}
+
+module_init(microread_mei_init);
+module_exit(microread_mei_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DRIVER_DESC);