1/*
2 * HCI based Driver for Inside Secure microread NFC Chip
3 *
4 * Copyright (C) 2013  Intel Corporation. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
17 */
18
19#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20
21#include <linux/module.h>
22#include <linux/mod_devicetable.h>
23#include <linux/nfc.h>
24#include <net/nfc/hci.h>
25#include <net/nfc/llc.h>
26
27#include "../mei_phy.h"
28#include "microread.h"
29
30#define MICROREAD_DRIVER_NAME "microread"
31
32static int microread_mei_probe(struct mei_cl_device *device,
33			       const struct mei_cl_device_id *id)
34{
35	struct nfc_mei_phy *phy;
36	int r;
37
38	pr_info("Probing NFC microread\n");
39
40	phy = nfc_mei_phy_alloc(device);
41	if (!phy) {
42		pr_err("Cannot allocate memory for microread mei phy.\n");
43		return -ENOMEM;
44	}
45
46	r = microread_probe(phy, &mei_phy_ops, LLC_NOP_NAME,
47			    MEI_NFC_HEADER_SIZE, 0, MEI_NFC_MAX_HCI_PAYLOAD,
48			    &phy->hdev);
49	if (r < 0) {
50		nfc_mei_phy_free(phy);
51
52		return r;
53	}
54
55	return 0;
56}
57
58static int microread_mei_remove(struct mei_cl_device *device)
59{
60	struct nfc_mei_phy *phy = mei_cl_get_drvdata(device);
61
62	microread_remove(phy->hdev);
63
64	nfc_mei_phy_free(phy);
65
66	return 0;
67}
68
69static struct mei_cl_device_id microread_mei_tbl[] = {
70	{ MICROREAD_DRIVER_NAME },
71
72	/* required last entry */
73	{ }
74};
75MODULE_DEVICE_TABLE(mei, microread_mei_tbl);
76
77static struct mei_cl_driver microread_driver = {
78	.id_table = microread_mei_tbl,
79	.name = MICROREAD_DRIVER_NAME,
80
81	.probe = microread_mei_probe,
82	.remove = microread_mei_remove,
83};
84
85static int microread_mei_init(void)
86{
87	int r;
88
89	pr_debug(DRIVER_DESC ": %s\n", __func__);
90
91	r = mei_cl_driver_register(&microread_driver);
92	if (r) {
93		pr_err(MICROREAD_DRIVER_NAME ": driver registration failed\n");
94		return r;
95	}
96
97	return 0;
98}
99
100static void microread_mei_exit(void)
101{
102	mei_cl_driver_unregister(&microread_driver);
103}
104
105module_init(microread_mei_init);
106module_exit(microread_mei_exit);
107
108MODULE_LICENSE("GPL");
109MODULE_DESCRIPTION(DRIVER_DESC);
110