tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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, write to the
17 * Free Software Foundation, Inc.,
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
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 pr_info("Removing microread\n");
63
64 microread_remove(phy->hdev);
65
66 nfc_mei_phy_free(phy);
67
68 return 0;
69}
70
71static struct mei_cl_device_id microread_mei_tbl[] = {
72 { MICROREAD_DRIVER_NAME },
73
74 /* required last entry */
75 { }
76};
77MODULE_DEVICE_TABLE(mei, microread_mei_tbl);
78
79static struct mei_cl_driver microread_driver = {
80 .id_table = microread_mei_tbl,
81 .name = MICROREAD_DRIVER_NAME,
82
83 .probe = microread_mei_probe,
84 .remove = microread_mei_remove,
85};
86
87static int microread_mei_init(void)
88{
89 int r;
90
91 pr_debug(DRIVER_DESC ": %s\n", __func__);
92
93 r = mei_cl_driver_register(µread_driver);
94 if (r) {
95 pr_err(MICROREAD_DRIVER_NAME ": driver registration failed\n");
96 return r;
97 }
98
99 return 0;
100}
101
102static void microread_mei_exit(void)
103{
104 mei_cl_driver_unregister(µread_driver);
105}
106
107module_init(microread_mei_init);
108module_exit(microread_mei_exit);
109
110MODULE_LICENSE("GPL");
111MODULE_DESCRIPTION(DRIVER_DESC);