1 // SPDX-License-Identifier: GPL-2.0-only
3 * Generic driver for NXP NCI NFC chips
5 * Copyright (C) 2014 NXP Semiconductors All rights reserved.
7 * Authors: Clément Perrochaud <clement.perrochaud@nxp.com>
9 * Derived from PN544 device driver:
10 * Copyright (C) 2012 Intel Corporation. All rights reserved.
13 #include <linux/delay.h>
14 #include <linux/module.h>
15 #include <linux/nfc.h>
17 #include <net/nfc/nci_core.h>
21 #define NXP_NCI_HDR_LEN 4
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)
30 static int nxp_nci_open(struct nci_dev *ndev)
32 struct nxp_nci_info *info = nci_get_drvdata(ndev);
35 mutex_lock(&info->info_lock);
37 if (info->mode != NXP_NCI_MODE_COLD) {
42 if (info->phy_ops->set_mode)
43 r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_NCI);
45 info->mode = NXP_NCI_MODE_NCI;
48 mutex_unlock(&info->info_lock);
52 static int nxp_nci_close(struct nci_dev *ndev)
54 struct nxp_nci_info *info = nci_get_drvdata(ndev);
57 mutex_lock(&info->info_lock);
59 if (info->phy_ops->set_mode)
60 r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
62 info->mode = NXP_NCI_MODE_COLD;
64 mutex_unlock(&info->info_lock);
68 static int nxp_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
70 struct nxp_nci_info *info = nci_get_drvdata(ndev);
73 if (!info->phy_ops->write)
76 if (info->mode != NXP_NCI_MODE_NCI)
79 r = info->phy_ops->write(info->phy_id, skb);
86 static const struct nci_ops nxp_nci_ops = {
88 .close = nxp_nci_close,
90 .fw_download = nxp_nci_fw_download,
93 int nxp_nci_probe(void *phy_id, struct device *pdev,
94 const struct nxp_nci_phy_ops *phy_ops,
95 unsigned int max_payload,
96 struct nci_dev **ndev)
98 struct nxp_nci_info *info;
101 info = devm_kzalloc(pdev, sizeof(struct nxp_nci_info), GFP_KERNEL);
105 info->phy_id = phy_id;
107 info->phy_ops = phy_ops;
108 info->max_payload = max_payload;
109 INIT_WORK(&info->fw_info.work, nxp_nci_fw_work);
110 init_completion(&info->fw_info.cmd_completion);
111 mutex_init(&info->info_lock);
113 if (info->phy_ops->set_mode) {
114 r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
119 info->mode = NXP_NCI_MODE_COLD;
121 info->ndev = nci_allocate_device(&nxp_nci_ops, NXP_NCI_NFC_PROTOCOLS,
126 nci_set_parent_dev(info->ndev, pdev);
127 nci_set_drvdata(info->ndev, info);
128 r = nci_register_device(info->ndev);
130 nci_free_device(info->ndev);
137 EXPORT_SYMBOL(nxp_nci_probe);
139 void nxp_nci_remove(struct nci_dev *ndev)
141 struct nxp_nci_info *info = nci_get_drvdata(ndev);
143 if (info->mode == NXP_NCI_MODE_FW)
144 nxp_nci_fw_work_complete(info, -ESHUTDOWN);
145 cancel_work_sync(&info->fw_info.work);
147 mutex_lock(&info->info_lock);
149 if (info->phy_ops->set_mode)
150 info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
152 nci_unregister_device(ndev);
153 nci_free_device(ndev);
155 mutex_unlock(&info->info_lock);
157 EXPORT_SYMBOL(nxp_nci_remove);
159 MODULE_LICENSE("GPL");
160 MODULE_DESCRIPTION("NXP NCI NFC driver");
161 MODULE_AUTHOR("Clément Perrochaud <clement.perrochaud@nxp.com>");