1/*
2 * HCI based Driver for NXP pn544 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#include <linux/module.h>
20#include <linux/mod_devicetable.h>
21#include <linux/nfc.h>
22#include <net/nfc/hci.h>
23#include <net/nfc/llc.h>
24
25#include "../mei_phy.h"
26#include "pn544.h"
27
28#define PN544_DRIVER_NAME "pn544"
29
30static int pn544_mei_probe(struct mei_cl_device *device,
31			       const struct mei_cl_device_id *id)
32{
33	struct nfc_mei_phy *phy;
34	int r;
35
36	pr_info("Probing NFC pn544\n");
37
38	phy = nfc_mei_phy_alloc(device);
39	if (!phy) {
40		pr_err("Cannot allocate memory for pn544 mei phy.\n");
41		return -ENOMEM;
42	}
43
44	r = pn544_hci_probe(phy, &mei_phy_ops, LLC_NOP_NAME,
45			    MEI_NFC_HEADER_SIZE, 0, MEI_NFC_MAX_HCI_PAYLOAD,
46			    NULL, &phy->hdev);
47	if (r < 0) {
48		nfc_mei_phy_free(phy);
49
50		return r;
51	}
52
53	return 0;
54}
55
56static int pn544_mei_remove(struct mei_cl_device *device)
57{
58	struct nfc_mei_phy *phy = mei_cl_get_drvdata(device);
59
60	pr_info("Removing pn544\n");
61
62	pn544_hci_remove(phy->hdev);
63
64	nfc_mei_phy_free(phy);
65
66	return 0;
67}
68
69static struct mei_cl_device_id pn544_mei_tbl[] = {
70	{ PN544_DRIVER_NAME },
71
72	/* required last entry */
73	{ }
74};
75MODULE_DEVICE_TABLE(mei, pn544_mei_tbl);
76
77static struct mei_cl_driver pn544_driver = {
78	.id_table = pn544_mei_tbl,
79	.name = PN544_DRIVER_NAME,
80
81	.probe = pn544_mei_probe,
82	.remove = pn544_mei_remove,
83};
84
85static int pn544_mei_init(void)
86{
87	int r;
88
89	pr_debug(DRIVER_DESC ": %s\n", __func__);
90
91	r = mei_cl_driver_register(&pn544_driver);
92	if (r) {
93		pr_err(PN544_DRIVER_NAME ": driver registration failed\n");
94		return r;
95	}
96
97	return 0;
98}
99
100static void pn544_mei_exit(void)
101{
102	mei_cl_driver_unregister(&pn544_driver);
103}
104
105module_init(pn544_mei_init);
106module_exit(pn544_mei_exit);
107
108MODULE_LICENSE("GPL");
109MODULE_DESCRIPTION(DRIVER_DESC);
110