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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Generic driver for NXP NCI NFC chips
4 *
5 * Copyright (C) 2014 NXP Semiconductors All rights reserved.
6 *
7 * Authors: Clément Perrochaud <clement.perrochaud@nxp.com>
8 *
9 * Derived from PN544 device driver:
10 * Copyright (C) 2012 Intel Corporation. All rights reserved.
11 */
12
13#include <linux/delay.h>
14#include <linux/module.h>
15#include <linux/nfc.h>
16
17#include <net/nfc/nci_core.h>
18
19#include "nxp-nci.h"
20
21#define NXP_NCI_HDR_LEN 4
22
23#define NXP_NCI_NFC_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
24 NFC_PROTO_MIFARE_MASK | \
25 NFC_PROTO_FELICA_MASK | \
26 NFC_PROTO_ISO14443_MASK | \
27 NFC_PROTO_ISO14443_B_MASK | \
28 NFC_PROTO_NFC_DEP_MASK)
29
30#define NXP_NCI_RF_PLL_UNLOCKED_NTF nci_opcode_pack(NCI_GID_RF_MGMT, 0x21)
31#define NXP_NCI_RF_TXLDO_ERROR_NTF nci_opcode_pack(NCI_GID_RF_MGMT, 0x23)
32
33static int nxp_nci_open(struct nci_dev *ndev)
34{
35 struct nxp_nci_info *info = nci_get_drvdata(ndev);
36 int r = 0;
37
38 mutex_lock(&info->info_lock);
39
40 if (info->mode != NXP_NCI_MODE_COLD) {
41 r = -EBUSY;
42 goto open_exit;
43 }
44
45 if (info->phy_ops->set_mode)
46 r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_NCI);
47
48 info->mode = NXP_NCI_MODE_NCI;
49
50open_exit:
51 mutex_unlock(&info->info_lock);
52 return r;
53}
54
55static int nxp_nci_close(struct nci_dev *ndev)
56{
57 struct nxp_nci_info *info = nci_get_drvdata(ndev);
58 int r = 0;
59
60 mutex_lock(&info->info_lock);
61
62 if (info->phy_ops->set_mode)
63 r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
64
65 info->mode = NXP_NCI_MODE_COLD;
66
67 mutex_unlock(&info->info_lock);
68 return r;
69}
70
71static int nxp_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
72{
73 struct nxp_nci_info *info = nci_get_drvdata(ndev);
74 int r;
75
76 if (!info->phy_ops->write) {
77 kfree_skb(skb);
78 return -EOPNOTSUPP;
79 }
80
81 if (info->mode != NXP_NCI_MODE_NCI) {
82 kfree_skb(skb);
83 return -EINVAL;
84 }
85
86 r = info->phy_ops->write(info->phy_id, skb);
87 if (r < 0) {
88 kfree_skb(skb);
89 return r;
90 }
91
92 consume_skb(skb);
93 return 0;
94}
95
96static int nxp_nci_rf_pll_unlocked_ntf(struct nci_dev *ndev,
97 struct sk_buff *skb)
98{
99 nfc_err(&ndev->nfc_dev->dev,
100 "PLL didn't lock. Missing or unstable clock?\n");
101
102 return 0;
103}
104
105static int nxp_nci_rf_txldo_error_ntf(struct nci_dev *ndev,
106 struct sk_buff *skb)
107{
108 nfc_err(&ndev->nfc_dev->dev,
109 "RF transmitter couldn't start. Bad power and/or configuration?\n");
110
111 return 0;
112}
113
114static const struct nci_driver_ops nxp_nci_core_ops[] = {
115 {
116 .opcode = NXP_NCI_RF_PLL_UNLOCKED_NTF,
117 .ntf = nxp_nci_rf_pll_unlocked_ntf,
118 },
119 {
120 .opcode = NXP_NCI_RF_TXLDO_ERROR_NTF,
121 .ntf = nxp_nci_rf_txldo_error_ntf,
122 },
123};
124
125static const struct nci_ops nxp_nci_ops = {
126 .open = nxp_nci_open,
127 .close = nxp_nci_close,
128 .send = nxp_nci_send,
129 .fw_download = nxp_nci_fw_download,
130 .core_ops = nxp_nci_core_ops,
131 .n_core_ops = ARRAY_SIZE(nxp_nci_core_ops),
132};
133
134int nxp_nci_probe(void *phy_id, struct device *pdev,
135 const struct nxp_nci_phy_ops *phy_ops,
136 unsigned int max_payload,
137 struct nci_dev **ndev)
138{
139 struct nxp_nci_info *info;
140 int r;
141
142 info = devm_kzalloc(pdev, sizeof(struct nxp_nci_info), GFP_KERNEL);
143 if (!info)
144 return -ENOMEM;
145
146 info->phy_id = phy_id;
147 info->pdev = pdev;
148 info->phy_ops = phy_ops;
149 info->max_payload = max_payload;
150 INIT_WORK(&info->fw_info.work, nxp_nci_fw_work);
151 init_completion(&info->fw_info.cmd_completion);
152 mutex_init(&info->info_lock);
153
154 if (info->phy_ops->set_mode) {
155 r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
156 if (r < 0)
157 return r;
158 }
159
160 info->mode = NXP_NCI_MODE_COLD;
161
162 info->ndev = nci_allocate_device(&nxp_nci_ops, NXP_NCI_NFC_PROTOCOLS,
163 NXP_NCI_HDR_LEN, 0);
164 if (!info->ndev)
165 return -ENOMEM;
166
167 nci_set_parent_dev(info->ndev, pdev);
168 nci_set_drvdata(info->ndev, info);
169 r = nci_register_device(info->ndev);
170 if (r < 0) {
171 nci_free_device(info->ndev);
172 return r;
173 }
174
175 *ndev = info->ndev;
176 return r;
177}
178EXPORT_SYMBOL(nxp_nci_probe);
179
180void nxp_nci_remove(struct nci_dev *ndev)
181{
182 struct nxp_nci_info *info = nci_get_drvdata(ndev);
183
184 if (info->mode == NXP_NCI_MODE_FW)
185 nxp_nci_fw_work_complete(info, -ESHUTDOWN);
186 cancel_work_sync(&info->fw_info.work);
187
188 mutex_lock(&info->info_lock);
189
190 if (info->phy_ops->set_mode)
191 info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
192
193 nci_unregister_device(ndev);
194 nci_free_device(ndev);
195
196 mutex_unlock(&info->info_lock);
197}
198EXPORT_SYMBOL(nxp_nci_remove);
199
200MODULE_LICENSE("GPL");
201MODULE_DESCRIPTION("NXP NCI NFC driver");
202MODULE_AUTHOR("Clément Perrochaud <clement.perrochaud@nxp.com>");
1/*
2 * Generic driver for NXP NCI NFC chips
3 *
4 * Copyright (C) 2014 NXP Semiconductors All rights reserved.
5 *
6 * Authors: Clément Perrochaud <clement.perrochaud@nxp.com>
7 *
8 * Derived from PN544 device driver:
9 * Copyright (C) 2012 Intel Corporation. All rights reserved.
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms and conditions of the GNU General Public License,
13 * version 2, as published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, see <http://www.gnu.org/licenses/>.
22 */
23
24#include <linux/delay.h>
25#include <linux/gpio.h>
26#include <linux/module.h>
27#include <linux/nfc.h>
28#include <linux/platform_data/nxp-nci.h>
29
30#include <net/nfc/nci_core.h>
31
32#include "nxp-nci.h"
33
34#define NXP_NCI_HDR_LEN 4
35
36#define NXP_NCI_NFC_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
37 NFC_PROTO_MIFARE_MASK | \
38 NFC_PROTO_FELICA_MASK | \
39 NFC_PROTO_ISO14443_MASK | \
40 NFC_PROTO_ISO14443_B_MASK | \
41 NFC_PROTO_NFC_DEP_MASK)
42
43static int nxp_nci_open(struct nci_dev *ndev)
44{
45 struct nxp_nci_info *info = nci_get_drvdata(ndev);
46 int r = 0;
47
48 mutex_lock(&info->info_lock);
49
50 if (info->mode != NXP_NCI_MODE_COLD) {
51 r = -EBUSY;
52 goto open_exit;
53 }
54
55 if (info->phy_ops->set_mode)
56 r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_NCI);
57
58 info->mode = NXP_NCI_MODE_NCI;
59
60open_exit:
61 mutex_unlock(&info->info_lock);
62 return r;
63}
64
65static int nxp_nci_close(struct nci_dev *ndev)
66{
67 struct nxp_nci_info *info = nci_get_drvdata(ndev);
68 int r = 0;
69
70 mutex_lock(&info->info_lock);
71
72 if (info->phy_ops->set_mode)
73 r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
74
75 info->mode = NXP_NCI_MODE_COLD;
76
77 mutex_unlock(&info->info_lock);
78 return r;
79}
80
81static int nxp_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
82{
83 struct nxp_nci_info *info = nci_get_drvdata(ndev);
84 int r;
85
86 if (!info->phy_ops->write) {
87 r = -ENOTSUPP;
88 goto send_exit;
89 }
90
91 if (info->mode != NXP_NCI_MODE_NCI) {
92 r = -EINVAL;
93 goto send_exit;
94 }
95
96 r = info->phy_ops->write(info->phy_id, skb);
97 if (r < 0)
98 kfree_skb(skb);
99
100send_exit:
101 return r;
102}
103
104static struct nci_ops nxp_nci_ops = {
105 .open = nxp_nci_open,
106 .close = nxp_nci_close,
107 .send = nxp_nci_send,
108 .fw_download = nxp_nci_fw_download,
109};
110
111int nxp_nci_probe(void *phy_id, struct device *pdev,
112 const struct nxp_nci_phy_ops *phy_ops,
113 unsigned int max_payload,
114 struct nci_dev **ndev)
115{
116 struct nxp_nci_info *info;
117 int r;
118
119 info = devm_kzalloc(pdev, sizeof(struct nxp_nci_info), GFP_KERNEL);
120 if (!info) {
121 r = -ENOMEM;
122 goto probe_exit;
123 }
124
125 info->phy_id = phy_id;
126 info->pdev = pdev;
127 info->phy_ops = phy_ops;
128 info->max_payload = max_payload;
129 INIT_WORK(&info->fw_info.work, nxp_nci_fw_work);
130 init_completion(&info->fw_info.cmd_completion);
131 mutex_init(&info->info_lock);
132
133 if (info->phy_ops->set_mode) {
134 r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
135 if (r < 0)
136 goto probe_exit;
137 }
138
139 info->mode = NXP_NCI_MODE_COLD;
140
141 info->ndev = nci_allocate_device(&nxp_nci_ops, NXP_NCI_NFC_PROTOCOLS,
142 NXP_NCI_HDR_LEN, 0);
143 if (!info->ndev) {
144 r = -ENOMEM;
145 goto probe_exit;
146 }
147
148 nci_set_parent_dev(info->ndev, pdev);
149 nci_set_drvdata(info->ndev, info);
150 r = nci_register_device(info->ndev);
151 if (r < 0)
152 goto probe_exit_free_nci;
153
154 *ndev = info->ndev;
155
156 goto probe_exit;
157
158probe_exit_free_nci:
159 nci_free_device(info->ndev);
160probe_exit:
161 return r;
162}
163EXPORT_SYMBOL(nxp_nci_probe);
164
165void nxp_nci_remove(struct nci_dev *ndev)
166{
167 struct nxp_nci_info *info = nci_get_drvdata(ndev);
168
169 if (info->mode == NXP_NCI_MODE_FW)
170 nxp_nci_fw_work_complete(info, -ESHUTDOWN);
171 cancel_work_sync(&info->fw_info.work);
172
173 mutex_lock(&info->info_lock);
174
175 if (info->phy_ops->set_mode)
176 info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
177
178 nci_unregister_device(ndev);
179 nci_free_device(ndev);
180
181 mutex_unlock(&info->info_lock);
182}
183EXPORT_SYMBOL(nxp_nci_remove);
184
185MODULE_LICENSE("GPL");
186MODULE_DESCRIPTION("NXP NCI NFC driver");
187MODULE_AUTHOR("Clément Perrochaud <clement.perrochaud@nxp.com>");