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c04c674f RB |
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 | ||
34 | static 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 | ||
69 | out: | |
70 | s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD); | |
71 | s3fwrn5_fw_cleanup(&info->fw_info); | |
72 | return ret; | |
73 | } | |
74 | ||
75 | static 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 | ||
88 | static 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 | ||
98 | static 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 | ||
118 | static 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 | ||
138 | out: | |
139 | return ret; | |
140 | } | |
141 | ||
142 | static 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 | ||
149 | int s3fwrn5_probe(struct nci_dev **ndev, void *phy_id, struct device *pdev, | |
150 | 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 | } | |
190 | EXPORT_SYMBOL(s3fwrn5_probe); | |
191 | ||
192 | void 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 | } | |
201 | EXPORT_SYMBOL(s3fwrn5_remove); | |
202 | ||
203 | int 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 | } | |
215 | EXPORT_SYMBOL(s3fwrn5_recv_frame); | |
216 | ||
217 | MODULE_LICENSE("GPL"); | |
218 | MODULE_DESCRIPTION("Samsung S3FWRN5 NFC driver"); | |
219 | MODULE_AUTHOR("Robert Baldyga <r.baldyga@samsung.com>"); |