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/gpio.h>
15 #include <linux/module.h>
16 #include <linux/nfc.h>
17 #include <linux/platform_data/nxp-nci.h>
19 #include <net/nfc/nci_core.h>
23 #define NXP_NCI_HDR_LEN 4
25 #define NXP_NCI_NFC_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
26 NFC_PROTO_MIFARE_MASK | \
27 NFC_PROTO_FELICA_MASK | \
28 NFC_PROTO_ISO14443_MASK | \
29 NFC_PROTO_ISO14443_B_MASK | \
30 NFC_PROTO_NFC_DEP_MASK)
32 static int nxp_nci_open(struct nci_dev *ndev)
34 struct nxp_nci_info *info = nci_get_drvdata(ndev);
37 mutex_lock(&info->info_lock);
39 if (info->mode != NXP_NCI_MODE_COLD) {
44 if (info->phy_ops->set_mode)
45 r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_NCI);
47 info->mode = NXP_NCI_MODE_NCI;
50 mutex_unlock(&info->info_lock);
54 static int nxp_nci_close(struct nci_dev *ndev)
56 struct nxp_nci_info *info = nci_get_drvdata(ndev);
59 mutex_lock(&info->info_lock);
61 if (info->phy_ops->set_mode)
62 r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
64 info->mode = NXP_NCI_MODE_COLD;
66 mutex_unlock(&info->info_lock);
70 static int nxp_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
72 struct nxp_nci_info *info = nci_get_drvdata(ndev);
75 if (!info->phy_ops->write) {
80 if (info->mode != NXP_NCI_MODE_NCI) {
85 r = info->phy_ops->write(info->phy_id, skb);
93 static struct nci_ops nxp_nci_ops = {
95 .close = nxp_nci_close,
97 .fw_download = nxp_nci_fw_download,
100 int nxp_nci_probe(void *phy_id, struct device *pdev,
101 const struct nxp_nci_phy_ops *phy_ops,
102 unsigned int max_payload,
103 struct nci_dev **ndev)
105 struct nxp_nci_info *info;
108 info = devm_kzalloc(pdev, sizeof(struct nxp_nci_info), GFP_KERNEL);
114 info->phy_id = phy_id;
116 info->phy_ops = phy_ops;
117 info->max_payload = max_payload;
118 INIT_WORK(&info->fw_info.work, nxp_nci_fw_work);
119 init_completion(&info->fw_info.cmd_completion);
120 mutex_init(&info->info_lock);
122 if (info->phy_ops->set_mode) {
123 r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
128 info->mode = NXP_NCI_MODE_COLD;
130 info->ndev = nci_allocate_device(&nxp_nci_ops, NXP_NCI_NFC_PROTOCOLS,
137 nci_set_parent_dev(info->ndev, pdev);
138 nci_set_drvdata(info->ndev, info);
139 r = nci_register_device(info->ndev);
141 goto probe_exit_free_nci;
148 nci_free_device(info->ndev);
152 EXPORT_SYMBOL(nxp_nci_probe);
154 void nxp_nci_remove(struct nci_dev *ndev)
156 struct nxp_nci_info *info = nci_get_drvdata(ndev);
158 if (info->mode == NXP_NCI_MODE_FW)
159 nxp_nci_fw_work_complete(info, -ESHUTDOWN);
160 cancel_work_sync(&info->fw_info.work);
162 mutex_lock(&info->info_lock);
164 if (info->phy_ops->set_mode)
165 info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
167 nci_unregister_device(ndev);
168 nci_free_device(ndev);
170 mutex_unlock(&info->info_lock);
172 EXPORT_SYMBOL(nxp_nci_remove);
174 MODULE_LICENSE("GPL");
175 MODULE_DESCRIPTION("NXP NCI NFC driver");
176 MODULE_AUTHOR("Clément Perrochaud <clement.perrochaud@nxp.com>");