From 52409fae3e4b8d16b68b61902fc09075cd97b75d Mon Sep 17 00:00:00 2001
From: Dominik Sliwa <dominik.sliwa@toradex.com>
Date: Sun, 2 Jul 2017 16:41:37 +0200
Subject: Backports generated from 4.11 kernel

Initial commit.

Signed-off-by: Dominik Sliwa <dominik.sliwa@toradex.com>
---
 drivers/nfc/microread/mei.c | 94 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 drivers/nfc/microread/mei.c

(limited to 'drivers/nfc/microread/mei.c')

diff --git a/drivers/nfc/microread/mei.c b/drivers/nfc/microread/mei.c
new file mode 100644
index 0000000..5d9e51b
--- /dev/null
+++ b/drivers/nfc/microread/mei.c
@@ -0,0 +1,94 @@
+/*
+ * 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 *cldev,
+			       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(cldev);
+	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 *cldev)
+{
+	struct nfc_mei_phy *phy = mei_cldev_get_drvdata(cldev);
+
+	microread_remove(phy->hdev);
+
+	nfc_mei_phy_free(phy);
+
+	return 0;
+}
+
+static struct mei_cl_device_id microread_mei_tbl[] = {
+#if LINUX_VERSION_IS_GEQ(4,4,0)
+	{ MICROREAD_DRIVER_NAME, MEI_NFC_UUID, MEI_CL_VERSION_ANY},
+#elif LINUX_VERSION_IS_GEQ(4,2,0)
+	{ MICROREAD_DRIVER_NAME, MEI_NFC_UUID},
+#else
+	{ MICROREAD_DRIVER_NAME},
+#endif
+
+	/* 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,
+};
+
+module_mei_cl_driver(microread_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DRIVER_DESC);
-- 
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