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
microread_mei_probe(struct mei_cl_device * cldev,const struct mei_cl_device_id * id)32 static int microread_mei_probe(struct mei_cl_device *cldev,
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(cldev);
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
microread_mei_remove(struct mei_cl_device * cldev)58 static int microread_mei_remove(struct mei_cl_device *cldev)
59 {
60 struct nfc_mei_phy *phy = mei_cldev_get_drvdata(cldev);
61
62 microread_remove(phy->hdev);
63
64 nfc_mei_phy_free(phy);
65
66 return 0;
67 }
68
69 static struct mei_cl_device_id microread_mei_tbl[] = {
70 { MICROREAD_DRIVER_NAME, MEI_NFC_UUID, MEI_CL_VERSION_ANY},
71
72 /* required last entry */
73 { }
74 };
75 MODULE_DEVICE_TABLE(mei, microread_mei_tbl);
76
77 static 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
microread_mei_init(void)85 static int microread_mei_init(void)
86 {
87 int r;
88
89 pr_debug(DRIVER_DESC ": %s\n", __func__);
90
91 r = mei_cldev_driver_register(µread_driver);
92 if (r) {
93 pr_err(MICROREAD_DRIVER_NAME ": driver registration failed\n");
94 return r;
95 }
96
97 return 0;
98 }
99
microread_mei_exit(void)100 static void microread_mei_exit(void)
101 {
102 mei_cldev_driver_unregister(µread_driver);
103 }
104
105 module_init(microread_mei_init);
106 module_exit(microread_mei_exit);
107
108 MODULE_LICENSE("GPL");
109 MODULE_DESCRIPTION(DRIVER_DESC);
110