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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
23static 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
58out:
59 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
60 s3fwrn5_fw_cleanup(&info->fw_info);
61 return ret;
62}
63
64static 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
77static 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
87static 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
103 mutex_unlock(&info->mutex);
104 return ret;
105}
106
107static int s3fwrn5_nci_post_setup(struct nci_dev *ndev)
108{
109 struct s3fwrn5_info *info = nci_get_drvdata(ndev);
110 int ret;
111
112 ret = s3fwrn5_firmware_update(info);
113 if (ret < 0)
114 goto out;
115
116 /* NCI core reset */
117
118 s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI);
119 s3fwrn5_set_wake(info, true);
120
121 ret = nci_core_reset(info->ndev);
122 if (ret < 0)
123 goto out;
124
125 ret = nci_core_init(info->ndev);
126
127out:
128 return ret;
129}
130
131static struct nci_ops s3fwrn5_nci_ops = {
132 .open = s3fwrn5_nci_open,
133 .close = s3fwrn5_nci_close,
134 .send = s3fwrn5_nci_send,
135 .post_setup = s3fwrn5_nci_post_setup,
136};
137
138int s3fwrn5_probe(struct nci_dev **ndev, void *phy_id, struct device *pdev,
139 const struct s3fwrn5_phy_ops *phy_ops, unsigned int max_payload)
140{
141 struct s3fwrn5_info *info;
142 int ret;
143
144 info = devm_kzalloc(pdev, sizeof(*info), GFP_KERNEL);
145 if (!info)
146 return -ENOMEM;
147
148 info->phy_id = phy_id;
149 info->pdev = pdev;
150 info->phy_ops = phy_ops;
151 info->max_payload = max_payload;
152 mutex_init(&info->mutex);
153
154 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
155
156 s3fwrn5_nci_get_prop_ops(&s3fwrn5_nci_ops.prop_ops,
157 &s3fwrn5_nci_ops.n_prop_ops);
158
159 info->ndev = nci_allocate_device(&s3fwrn5_nci_ops,
160 S3FWRN5_NFC_PROTOCOLS, 0, 0);
161 if (!info->ndev)
162 return -ENOMEM;
163
164 nci_set_parent_dev(info->ndev, pdev);
165 nci_set_drvdata(info->ndev, info);
166
167 ret = nci_register_device(info->ndev);
168 if (ret < 0) {
169 nci_free_device(info->ndev);
170 return ret;
171 }
172
173 info->fw_info.ndev = info->ndev;
174
175 *ndev = info->ndev;
176
177 return ret;
178}
179EXPORT_SYMBOL(s3fwrn5_probe);
180
181void s3fwrn5_remove(struct nci_dev *ndev)
182{
183 struct s3fwrn5_info *info = nci_get_drvdata(ndev);
184
185 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
186
187 nci_unregister_device(ndev);
188 nci_free_device(ndev);
189}
190EXPORT_SYMBOL(s3fwrn5_remove);
191
192int s3fwrn5_recv_frame(struct nci_dev *ndev, struct sk_buff *skb,
193 enum s3fwrn5_mode mode)
194{
195 switch (mode) {
196 case S3FWRN5_MODE_NCI:
197 return nci_recv_frame(ndev, skb);
198 case S3FWRN5_MODE_FW:
199 return s3fwrn5_fw_recv_frame(ndev, skb);
200 default:
201 kfree_skb(skb);
202 return -ENODEV;
203 }
204}
205EXPORT_SYMBOL(s3fwrn5_recv_frame);
206
207MODULE_LICENSE("GPL");
208MODULE_DESCRIPTION("Samsung S3FWRN5 NFC driver");
209MODULE_AUTHOR("Robert Baldyga <r.baldyga@samsung.com>");
1/*
2 * NCI based driver for Samsung S3FWRN5 NFC chip
3 *
4 * Copyright (C) 2015 Samsung Electrnoics
5 * Robert Baldyga <r.baldyga@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms and conditions of the GNU General Public License,
9 * version 2 or later, as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20#include <linux/module.h>
21#include <net/nfc/nci_core.h>
22
23#include "s3fwrn5.h"
24#include "firmware.h"
25#include "nci.h"
26
27#define S3FWRN5_NFC_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
28 NFC_PROTO_MIFARE_MASK | \
29 NFC_PROTO_FELICA_MASK | \
30 NFC_PROTO_ISO14443_MASK | \
31 NFC_PROTO_ISO14443_B_MASK | \
32 NFC_PROTO_ISO15693_MASK)
33
34static int s3fwrn5_firmware_update(struct s3fwrn5_info *info)
35{
36 bool need_update;
37 int ret;
38
39 s3fwrn5_fw_init(&info->fw_info, "sec_s3fwrn5_firmware.bin");
40
41 /* Update firmware */
42
43 s3fwrn5_set_wake(info, false);
44 s3fwrn5_set_mode(info, S3FWRN5_MODE_FW);
45
46 ret = s3fwrn5_fw_setup(&info->fw_info);
47 if (ret < 0)
48 return ret;
49
50 need_update = s3fwrn5_fw_check_version(&info->fw_info,
51 info->ndev->manufact_specific_info);
52 if (!need_update)
53 goto out;
54
55 dev_info(&info->ndev->nfc_dev->dev, "Detected new firmware version\n");
56
57 ret = s3fwrn5_fw_download(&info->fw_info);
58 if (ret < 0)
59 goto out;
60
61 /* Update RF configuration */
62
63 s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI);
64
65 s3fwrn5_set_wake(info, true);
66 ret = s3fwrn5_nci_rf_configure(info, "sec_s3fwrn5_rfreg.bin");
67 s3fwrn5_set_wake(info, false);
68
69out:
70 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
71 s3fwrn5_fw_cleanup(&info->fw_info);
72 return ret;
73}
74
75static int s3fwrn5_nci_open(struct nci_dev *ndev)
76{
77 struct s3fwrn5_info *info = nci_get_drvdata(ndev);
78
79 if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_COLD)
80 return -EBUSY;
81
82 s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI);
83 s3fwrn5_set_wake(info, true);
84
85 return 0;
86}
87
88static int s3fwrn5_nci_close(struct nci_dev *ndev)
89{
90 struct s3fwrn5_info *info = nci_get_drvdata(ndev);
91
92 s3fwrn5_set_wake(info, false);
93 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
94
95 return 0;
96}
97
98static int s3fwrn5_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
99{
100 struct s3fwrn5_info *info = nci_get_drvdata(ndev);
101 int ret;
102
103 mutex_lock(&info->mutex);
104
105 if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_NCI) {
106 mutex_unlock(&info->mutex);
107 return -EINVAL;
108 }
109
110 ret = s3fwrn5_write(info, skb);
111 if (ret < 0)
112 kfree_skb(skb);
113
114 mutex_unlock(&info->mutex);
115 return ret;
116}
117
118static int s3fwrn5_nci_post_setup(struct nci_dev *ndev)
119{
120 struct s3fwrn5_info *info = nci_get_drvdata(ndev);
121 int ret;
122
123 ret = s3fwrn5_firmware_update(info);
124 if (ret < 0)
125 goto out;
126
127 /* NCI core reset */
128
129 s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI);
130 s3fwrn5_set_wake(info, true);
131
132 ret = nci_core_reset(info->ndev);
133 if (ret < 0)
134 goto out;
135
136 ret = nci_core_init(info->ndev);
137
138out:
139 return ret;
140}
141
142static struct nci_ops s3fwrn5_nci_ops = {
143 .open = s3fwrn5_nci_open,
144 .close = s3fwrn5_nci_close,
145 .send = s3fwrn5_nci_send,
146 .post_setup = s3fwrn5_nci_post_setup,
147};
148
149int s3fwrn5_probe(struct nci_dev **ndev, void *phy_id, struct device *pdev,
150 const struct s3fwrn5_phy_ops *phy_ops, unsigned int max_payload)
151{
152 struct s3fwrn5_info *info;
153 int ret;
154
155 info = devm_kzalloc(pdev, sizeof(*info), GFP_KERNEL);
156 if (!info)
157 return -ENOMEM;
158
159 info->phy_id = phy_id;
160 info->pdev = pdev;
161 info->phy_ops = phy_ops;
162 info->max_payload = max_payload;
163 mutex_init(&info->mutex);
164
165 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
166
167 s3fwrn5_nci_get_prop_ops(&s3fwrn5_nci_ops.prop_ops,
168 &s3fwrn5_nci_ops.n_prop_ops);
169
170 info->ndev = nci_allocate_device(&s3fwrn5_nci_ops,
171 S3FWRN5_NFC_PROTOCOLS, 0, 0);
172 if (!info->ndev)
173 return -ENOMEM;
174
175 nci_set_parent_dev(info->ndev, pdev);
176 nci_set_drvdata(info->ndev, info);
177
178 ret = nci_register_device(info->ndev);
179 if (ret < 0) {
180 nci_free_device(info->ndev);
181 return ret;
182 }
183
184 info->fw_info.ndev = info->ndev;
185
186 *ndev = info->ndev;
187
188 return ret;
189}
190EXPORT_SYMBOL(s3fwrn5_probe);
191
192void s3fwrn5_remove(struct nci_dev *ndev)
193{
194 struct s3fwrn5_info *info = nci_get_drvdata(ndev);
195
196 s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
197
198 nci_unregister_device(ndev);
199 nci_free_device(ndev);
200}
201EXPORT_SYMBOL(s3fwrn5_remove);
202
203int s3fwrn5_recv_frame(struct nci_dev *ndev, struct sk_buff *skb,
204 enum s3fwrn5_mode mode)
205{
206 switch (mode) {
207 case S3FWRN5_MODE_NCI:
208 return nci_recv_frame(ndev, skb);
209 case S3FWRN5_MODE_FW:
210 return s3fwrn5_fw_recv_frame(ndev, skb);
211 default:
212 return -ENODEV;
213 }
214}
215EXPORT_SYMBOL(s3fwrn5_recv_frame);
216
217MODULE_LICENSE("GPL");
218MODULE_DESCRIPTION("Samsung S3FWRN5 NFC driver");
219MODULE_AUTHOR("Robert Baldyga <r.baldyga@samsung.com>");