1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * NCI based driver for Samsung S3FWRN5 NFC chip
4 *
5 * Copyright (C) 2015 Samsung Electrnoics
6 * Robert Baldyga <r.baldyga@samsung.com>
7 */
8
9 #include <linux/module.h>
10 #include <net/nfc/nci_core.h>
11
12 #include "s3fwrn5.h"
13 #include "firmware.h"
14 #include "nci.h"
15
16 #define S3FWRN5_NFC_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
17 NFC_PROTO_MIFARE_MASK | \
18 NFC_PROTO_FELICA_MASK | \
19 NFC_PROTO_ISO14443_MASK | \
20 NFC_PROTO_ISO14443_B_MASK | \
21 NFC_PROTO_ISO15693_MASK)
22
s3fwrn5_firmware_update(struct s3fwrn5_info *info)23 static int s3fwrn5_firmware_update(struct s3fwrn5_info *info)
24 {
25 bool need_update;
26 int ret;
27
28 s3fwrn5_fw_init(&info->fw_info, "sec_s3fwrn5_firmware.bin");
29
30 /* Update firmware */
31
32 s3fwrn5_set_wake(info, false);
33 s3fwrn5_set_mode(info, S3FWRN5_MODE_FW);
34
35 ret = s3fwrn5_fw_setup(&info->fw_info);
36 if (ret < 0)
37 return ret;
38
39 need_update = s3fwrn5_fw_check_version(&info->fw_info,
40 info->ndev->manufact_specific_info);
41 if (!need_update)
42 goto out;
43
44 dev_info(&info->ndev->nfc_dev->dev, "Detected new firmware version\n");
45
46 ret = s3fwrn5_fw_download(&info->fw_info);
47 if (ret < 0)
48 goto out;
49
50 /* Update RF configuration */
51
52 s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI);
53
54 s3fwrn5_set_wake(info, true);
55 ret = s3fwrn5_nci_rf_configure(info, "sec_s3fwrn5_rfreg.bin");
56 s3fwrn5_set_wake(info, false);
57
58 out:
59 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
60 s3fwrn5_fw_cleanup(&info->fw_info);
61 return ret;
62 }
63
s3fwrn5_nci_open(struct nci_dev *ndev)64 static int s3fwrn5_nci_open(struct nci_dev *ndev)
65 {
66 struct s3fwrn5_info *info = nci_get_drvdata(ndev);
67
68 if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_COLD)
69 return -EBUSY;
70
71 s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI);
72 s3fwrn5_set_wake(info, true);
73
74 return 0;
75 }
76
s3fwrn5_nci_close(struct nci_dev *ndev)77 static int s3fwrn5_nci_close(struct nci_dev *ndev)
78 {
79 struct s3fwrn5_info *info = nci_get_drvdata(ndev);
80
81 s3fwrn5_set_wake(info, false);
82 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
83
84 return 0;
85 }
86
s3fwrn5_nci_send(struct nci_dev *ndev, struct sk_buff *skb)87 static int s3fwrn5_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
88 {
89 struct s3fwrn5_info *info = nci_get_drvdata(ndev);
90 int ret;
91
92 mutex_lock(&info->mutex);
93
94 if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_NCI) {
95 mutex_unlock(&info->mutex);
96 return -EINVAL;
97 }
98
99 ret = s3fwrn5_write(info, skb);
100 if (ret < 0) {
101 kfree_skb(skb);
102 mutex_unlock(&info->mutex);
103 return ret;
104 }
105
106 consume_skb(skb);
107 mutex_unlock(&info->mutex);
108 return 0;
109 }
110
s3fwrn5_nci_post_setup(struct nci_dev *ndev)111 static int s3fwrn5_nci_post_setup(struct nci_dev *ndev)
112 {
113 struct s3fwrn5_info *info = nci_get_drvdata(ndev);
114 int ret;
115
116 ret = s3fwrn5_firmware_update(info);
117 if (ret < 0)
118 goto out;
119
120 /* NCI core reset */
121
122 s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI);
123 s3fwrn5_set_wake(info, true);
124
125 ret = nci_core_reset(info->ndev);
126 if (ret < 0)
127 goto out;
128
129 ret = nci_core_init(info->ndev);
130
131 out:
132 return ret;
133 }
134
135 static struct nci_ops s3fwrn5_nci_ops = {
136 .open = s3fwrn5_nci_open,
137 .close = s3fwrn5_nci_close,
138 .send = s3fwrn5_nci_send,
139 .post_setup = s3fwrn5_nci_post_setup,
140 };
141
s3fwrn5_probe(struct nci_dev **ndev, void *phy_id, struct device *pdev, const struct s3fwrn5_phy_ops *phy_ops, unsigned int max_payload)142 int s3fwrn5_probe(struct nci_dev **ndev, void *phy_id, struct device *pdev,
143 const struct s3fwrn5_phy_ops *phy_ops, unsigned int max_payload)
144 {
145 struct s3fwrn5_info *info;
146 int ret;
147
148 info = devm_kzalloc(pdev, sizeof(*info), GFP_KERNEL);
149 if (!info)
150 return -ENOMEM;
151
152 info->phy_id = phy_id;
153 info->pdev = pdev;
154 info->phy_ops = phy_ops;
155 info->max_payload = max_payload;
156 mutex_init(&info->mutex);
157
158 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
159
160 s3fwrn5_nci_get_prop_ops(&s3fwrn5_nci_ops.prop_ops,
161 &s3fwrn5_nci_ops.n_prop_ops);
162
163 info->ndev = nci_allocate_device(&s3fwrn5_nci_ops,
164 S3FWRN5_NFC_PROTOCOLS, 0, 0);
165 if (!info->ndev)
166 return -ENOMEM;
167
168 nci_set_parent_dev(info->ndev, pdev);
169 nci_set_drvdata(info->ndev, info);
170
171 ret = nci_register_device(info->ndev);
172 if (ret < 0) {
173 nci_free_device(info->ndev);
174 return ret;
175 }
176
177 info->fw_info.ndev = info->ndev;
178
179 *ndev = info->ndev;
180
181 return ret;
182 }
183 EXPORT_SYMBOL(s3fwrn5_probe);
184
s3fwrn5_remove(struct nci_dev *ndev)185 void s3fwrn5_remove(struct nci_dev *ndev)
186 {
187 struct s3fwrn5_info *info = nci_get_drvdata(ndev);
188
189 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
190
191 nci_unregister_device(ndev);
192 nci_free_device(ndev);
193 }
194 EXPORT_SYMBOL(s3fwrn5_remove);
195
s3fwrn5_recv_frame(struct nci_dev *ndev, struct sk_buff *skb, enum s3fwrn5_mode mode)196 int s3fwrn5_recv_frame(struct nci_dev *ndev, struct sk_buff *skb,
197 enum s3fwrn5_mode mode)
198 {
199 switch (mode) {
200 case S3FWRN5_MODE_NCI:
201 return nci_recv_frame(ndev, skb);
202 case S3FWRN5_MODE_FW:
203 return s3fwrn5_fw_recv_frame(ndev, skb);
204 default:
205 kfree_skb(skb);
206 return -ENODEV;
207 }
208 }
209 EXPORT_SYMBOL(s3fwrn5_recv_frame);
210
211 MODULE_LICENSE("GPL");
212 MODULE_DESCRIPTION("Samsung S3FWRN5 NFC driver");
213 MODULE_AUTHOR("Robert Baldyga <r.baldyga@samsung.com>");
214