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ed06aeef CR |
1 | /* |
2 | * NCI based Driver for STMicroelectronics NFC Chip | |
3 | * | |
4 | * Copyright (C) 2014-2015 STMicroelectronics SAS. 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/nfc.h> | |
21 | #include <net/nfc/nci.h> | |
22 | #include <net/nfc/nci_core.h> | |
23 | #include <linux/gpio.h> | |
24 | #include <linux/delay.h> | |
25 | ||
26 | #include "st-nci.h" | |
ed06aeef CR |
27 | |
28 | #define DRIVER_DESC "NCI NFC driver for ST_NCI" | |
29 | ||
30 | #define ST_NCI1_X_PROPRIETARY_ISO15693 0x83 | |
31 | ||
32 | static int st_nci_init(struct nci_dev *ndev) | |
33 | { | |
34 | struct nci_mode_set_cmd cmd; | |
35 | ||
36 | cmd.cmd_type = ST_NCI_SET_NFC_MODE; | |
37 | cmd.mode = 1; | |
38 | ||
39 | return nci_prop_cmd(ndev, ST_NCI_CORE_PROP, | |
40 | sizeof(struct nci_mode_set_cmd), (__u8 *)&cmd); | |
41 | } | |
42 | ||
43 | static int st_nci_open(struct nci_dev *ndev) | |
44 | { | |
45 | struct st_nci_info *info = nci_get_drvdata(ndev); | |
46 | int r; | |
47 | ||
48 | if (test_and_set_bit(ST_NCI_RUNNING, &info->flags)) | |
49 | return 0; | |
50 | ||
51 | r = ndlc_open(info->ndlc); | |
52 | if (r) | |
53 | clear_bit(ST_NCI_RUNNING, &info->flags); | |
54 | ||
55 | return r; | |
56 | } | |
57 | ||
58 | static int st_nci_close(struct nci_dev *ndev) | |
59 | { | |
60 | struct st_nci_info *info = nci_get_drvdata(ndev); | |
61 | ||
62 | if (!test_bit(ST_NCI_RUNNING, &info->flags)) | |
63 | return 0; | |
64 | ||
65 | ndlc_close(info->ndlc); | |
66 | ||
67 | clear_bit(ST_NCI_RUNNING, &info->flags); | |
68 | ||
69 | return 0; | |
70 | } | |
71 | ||
72 | static int st_nci_send(struct nci_dev *ndev, struct sk_buff *skb) | |
73 | { | |
74 | struct st_nci_info *info = nci_get_drvdata(ndev); | |
75 | ||
76 | skb->dev = (void *)ndev; | |
77 | ||
78 | if (!test_bit(ST_NCI_RUNNING, &info->flags)) | |
79 | return -EBUSY; | |
80 | ||
81 | return ndlc_send(info->ndlc, skb); | |
82 | } | |
83 | ||
84 | static __u32 st_nci_get_rfprotocol(struct nci_dev *ndev, | |
85 | __u8 rf_protocol) | |
86 | { | |
87 | return rf_protocol == ST_NCI1_X_PROPRIETARY_ISO15693 ? | |
88 | NFC_PROTO_ISO15693_MASK : 0; | |
89 | } | |
90 | ||
91 | static int st_nci_prop_rsp_packet(struct nci_dev *ndev, | |
92 | struct sk_buff *skb) | |
93 | { | |
94 | __u8 status = skb->data[0]; | |
95 | ||
96 | nci_req_complete(ndev, status); | |
97 | return 0; | |
98 | } | |
99 | ||
22e4bd09 | 100 | static struct nci_driver_ops st_nci_prop_ops[] = { |
ed06aeef CR |
101 | { |
102 | .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, | |
103 | ST_NCI_CORE_PROP), | |
104 | .rsp = st_nci_prop_rsp_packet, | |
105 | }, | |
106 | }; | |
107 | ||
108 | static struct nci_ops st_nci_ops = { | |
109 | .init = st_nci_init, | |
110 | .open = st_nci_open, | |
111 | .close = st_nci_close, | |
112 | .send = st_nci_send, | |
113 | .get_rfprotocol = st_nci_get_rfprotocol, | |
114 | .discover_se = st_nci_discover_se, | |
115 | .enable_se = st_nci_enable_se, | |
116 | .disable_se = st_nci_disable_se, | |
117 | .se_io = st_nci_se_io, | |
118 | .hci_load_session = st_nci_hci_load_session, | |
119 | .hci_event_received = st_nci_hci_event_received, | |
120 | .hci_cmd_received = st_nci_hci_cmd_received, | |
121 | .prop_ops = st_nci_prop_ops, | |
122 | .n_prop_ops = ARRAY_SIZE(st_nci_prop_ops), | |
123 | }; | |
124 | ||
125 | int st_nci_probe(struct llt_ndlc *ndlc, int phy_headroom, | |
3648dc6d | 126 | int phy_tailroom, struct st_nci_se_status *se_status) |
ed06aeef CR |
127 | { |
128 | struct st_nci_info *info; | |
129 | int r; | |
130 | u32 protocols; | |
131 | ||
132 | info = devm_kzalloc(ndlc->dev, | |
133 | sizeof(struct st_nci_info), GFP_KERNEL); | |
134 | if (!info) | |
135 | return -ENOMEM; | |
136 | ||
137 | protocols = NFC_PROTO_JEWEL_MASK | |
138 | | NFC_PROTO_MIFARE_MASK | |
139 | | NFC_PROTO_FELICA_MASK | |
140 | | NFC_PROTO_ISO14443_MASK | |
141 | | NFC_PROTO_ISO14443_B_MASK | |
142 | | NFC_PROTO_ISO15693_MASK | |
143 | | NFC_PROTO_NFC_DEP_MASK; | |
144 | ||
145 | ndlc->ndev = nci_allocate_device(&st_nci_ops, protocols, | |
146 | phy_headroom, phy_tailroom); | |
147 | if (!ndlc->ndev) { | |
148 | pr_err("Cannot allocate nfc ndev\n"); | |
149 | return -ENOMEM; | |
150 | } | |
151 | info->ndlc = ndlc; | |
152 | ||
153 | nci_set_drvdata(ndlc->ndev, info); | |
154 | ||
b1fa4dc4 CR |
155 | r = st_nci_vendor_cmds_init(ndlc->ndev); |
156 | if (r) { | |
157 | pr_err("Cannot register proprietary vendor cmds\n"); | |
158 | goto err_reg_dev; | |
159 | } | |
160 | ||
ed06aeef CR |
161 | r = nci_register_device(ndlc->ndev); |
162 | if (r) { | |
163 | pr_err("Cannot register nfc device to nci core\n"); | |
b1fa4dc4 | 164 | goto err_reg_dev; |
ed06aeef CR |
165 | } |
166 | ||
3648dc6d | 167 | return st_nci_se_init(ndlc->ndev, se_status); |
b1fa4dc4 CR |
168 | |
169 | err_reg_dev: | |
170 | nci_free_device(ndlc->ndev); | |
171 | return r; | |
ed06aeef CR |
172 | } |
173 | EXPORT_SYMBOL_GPL(st_nci_probe); | |
174 | ||
175 | void st_nci_remove(struct nci_dev *ndev) | |
176 | { | |
177 | struct st_nci_info *info = nci_get_drvdata(ndev); | |
178 | ||
179 | ndlc_close(info->ndlc); | |
180 | ||
181 | nci_unregister_device(ndev); | |
182 | nci_free_device(ndev); | |
183 | } | |
184 | EXPORT_SYMBOL_GPL(st_nci_remove); | |
185 | ||
186 | MODULE_LICENSE("GPL"); | |
187 | MODULE_DESCRIPTION(DRIVER_DESC); |