2 * Generic driver for NXP NCI NFC chips
4 * Copyright (C) 2014 NXP Semiconductors All rights reserved.
6 * Authors: Clément Perrochaud <clement.perrochaud@nxp.com>
8 * Derived from PN544 device driver:
9 * Copyright (C) 2012 Intel Corporation. All rights reserved.
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.
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.
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/>.
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>
30 #include <net/nfc/nci_core.h>
34 #define NXP_NCI_HDR_LEN 4
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)
43 static int nxp_nci_open(struct nci_dev *ndev)
45 struct nxp_nci_info *info = nci_get_drvdata(ndev);
48 mutex_lock(&info->info_lock);
50 if (info->mode != NXP_NCI_MODE_COLD) {
55 if (info->phy_ops->set_mode)
56 r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_NCI);
58 info->mode = NXP_NCI_MODE_NCI;
61 mutex_unlock(&info->info_lock);
65 static int nxp_nci_close(struct nci_dev *ndev)
67 struct nxp_nci_info *info = nci_get_drvdata(ndev);
70 mutex_lock(&info->info_lock);
72 if (info->phy_ops->set_mode)
73 r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
75 info->mode = NXP_NCI_MODE_COLD;
77 mutex_unlock(&info->info_lock);
81 static int nxp_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
83 struct nxp_nci_info *info = nci_get_drvdata(ndev);
86 if (!info->phy_ops->write) {
91 if (info->mode != NXP_NCI_MODE_NCI) {
96 r = info->phy_ops->write(info->phy_id, skb);
104 static 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,
111 int nxp_nci_probe(void *phy_id, struct device *pdev,
112 struct nxp_nci_phy_ops *phy_ops, unsigned int max_payload,
113 struct nci_dev **ndev)
115 struct nxp_nci_info *info;
118 info = devm_kzalloc(pdev, sizeof(struct nxp_nci_info), GFP_KERNEL);
124 info->phy_id = phy_id;
126 info->phy_ops = phy_ops;
127 info->max_payload = max_payload;
128 INIT_WORK(&info->fw_info.work, nxp_nci_fw_work);
129 init_completion(&info->fw_info.cmd_completion);
130 mutex_init(&info->info_lock);
132 if (info->phy_ops->set_mode) {
133 r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
138 info->mode = NXP_NCI_MODE_COLD;
140 info->ndev = nci_allocate_device(&nxp_nci_ops, NXP_NCI_NFC_PROTOCOLS,
147 nci_set_parent_dev(info->ndev, pdev);
148 nci_set_drvdata(info->ndev, info);
149 r = nci_register_device(info->ndev);
151 goto probe_exit_free_nci;
158 nci_free_device(info->ndev);
162 EXPORT_SYMBOL(nxp_nci_probe);
164 void nxp_nci_remove(struct nci_dev *ndev)
166 struct nxp_nci_info *info = nci_get_drvdata(ndev);
168 if (info->mode == NXP_NCI_MODE_FW)
169 nxp_nci_fw_work_complete(info, -ESHUTDOWN);
170 cancel_work_sync(&info->fw_info.work);
172 mutex_lock(&info->info_lock);
174 if (info->phy_ops->set_mode)
175 info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
177 nci_unregister_device(ndev);
178 nci_free_device(ndev);
180 mutex_unlock(&info->info_lock);
182 EXPORT_SYMBOL(nxp_nci_remove);
184 MODULE_LICENSE("GPL");
185 MODULE_DESCRIPTION("NXP NCI NFC driver");
186 MODULE_AUTHOR("Clément Perrochaud <clement.perrochaud@nxp.com>");