summaryrefslogtreecommitdiffstats
path: root/drivers/nfc/nfcmrvl/main.c
blob: 85e8bcf986936123bdab959e5b01fb8738d80e79 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
/*
 * Marvell NFC driver: major functions
 *
 * Copyright (C) 2014, Marvell International Ltd.
 *
 * This software file (the "File") is distributed by Marvell International
 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
 * (the "License").  You may use, redistribute and/or modify this File in
 * accordance with the terms and conditions of the License, a copy of which
 * is available on the worldwide web at
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 * this warranty disclaimer.
 */

#include <linux/module.h>
#include <linux/nfc.h>
#include <net/nfc/nci.h>
#include <net/nfc/nci_core.h>
#include "nfcmrvl.h"

#define VERSION "1.0"

static int nfcmrvl_nci_open(struct nci_dev *ndev)
{
	struct nfcmrvl_private *priv = nci_get_drvdata(ndev);
	int err;

	if (test_and_set_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
		return 0;

	err = priv->if_ops->nci_open(priv);

	if (err)
		clear_bit(NFCMRVL_NCI_RUNNING, &priv->flags);

	return err;
}

static int nfcmrvl_nci_close(struct nci_dev *ndev)
{
	struct nfcmrvl_private *priv = nci_get_drvdata(ndev);

	if (!test_and_clear_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
		return 0;

	priv->if_ops->nci_close(priv);

	return 0;
}

static int nfcmrvl_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
{
	struct nfcmrvl_private *priv = nci_get_drvdata(ndev);

	nfc_info(priv->dev, "send entry, len %d\n", skb->len);

	skb->dev = (void *)ndev;

	if (!test_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
		return -EBUSY;

	return priv->if_ops->nci_send(priv, skb);
}

static int nfcmrvl_nci_setup(struct nci_dev *ndev)
{
	__u8 val;

	val = NFCMRVL_GPIO_PIN_NFC_NOT_ALLOWED;
	nci_set_config(ndev, NFCMRVL_NOT_ALLOWED_ID, 1, &val);
	val = NFCMRVL_GPIO_PIN_NFC_ACTIVE;
	nci_set_config(ndev, NFCMRVL_ACTIVE_ID, 1, &val);
	val = NFCMRVL_EXT_COEX_ENABLE;
	nci_set_config(ndev, NFCMRVL_EXT_COEX_ID, 1, &val);

	return 0;
}

static struct nci_ops nfcmrvl_nci_ops = {
	.open = nfcmrvl_nci_open,
	.close = nfcmrvl_nci_close,
	.send = nfcmrvl_nci_send,
	.setup = nfcmrvl_nci_setup,
};

struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data,
						 struct nfcmrvl_if_ops *ops,
						 struct device *dev)
{
	struct nfcmrvl_private *priv;
	int rc;
	u32 protocols;

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return ERR_PTR(-ENOMEM);

	priv->drv_data = drv_data;
	priv->if_ops = ops;
	priv->dev = dev;

	protocols = NFC_PROTO_JEWEL_MASK
		| NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK
		| NFC_PROTO_ISO14443_MASK
		| NFC_PROTO_ISO14443_B_MASK
		| NFC_PROTO_NFC_DEP_MASK;

	priv->ndev = nci_allocate_device(&nfcmrvl_nci_ops, protocols, 0, 0);
	if (!priv->ndev) {
		nfc_err(dev, "nci_allocate_device failed");
		rc = -ENOMEM;
		goto error;
	}

	nci_set_drvdata(priv->ndev, priv);

	rc = nci_register_device(priv->ndev);
	if (rc) {
		nfc_err(dev, "nci_register_device failed %d", rc);
		nci_free_device(priv->ndev);
		goto error;
	}

	nfc_info(dev, "registered with nci successfully\n");
	return priv;

error:
	kfree(priv);
	return ERR_PTR(rc);
}
EXPORT_SYMBOL_GPL(nfcmrvl_nci_register_dev);

void nfcmrvl_nci_unregister_dev(struct nfcmrvl_private *priv)
{
	struct nci_dev *ndev = priv->ndev;

	nci_unregister_device(ndev);
	nci_free_device(ndev);
	kfree(priv);
}
EXPORT_SYMBOL_GPL(nfcmrvl_nci_unregister_dev);

int nfcmrvl_nci_recv_frame(struct nfcmrvl_private *priv, void *data, int count)
{
	struct sk_buff *skb;

	skb = nci_skb_alloc(priv->ndev, count, GFP_ATOMIC);
	if (!skb)
		return -ENOMEM;

	memcpy(skb_put(skb, count), data, count);
	nci_recv_frame(priv->ndev, skb);

	return count;
}
EXPORT_SYMBOL_GPL(nfcmrvl_nci_recv_frame);

MODULE_AUTHOR("Marvell International Ltd.");
MODULE_DESCRIPTION("Marvell NFC driver ver " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL v2");
OpenPOWER on IntegriCloud