Clément Perrochaud | dece458 | 2015-03-09 11:12:04 +0100 | [diff] [blame] | 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 | |
| 43 | static 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 | |
| 60 | open_exit: |
| 61 | mutex_unlock(&info->info_lock); |
| 62 | return r; |
| 63 | } |
| 64 | |
| 65 | static 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 | |
| 81 | static 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 | |
| 100 | send_exit: |
| 101 | return r; |
| 102 | } |
| 103 | |
| 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, |
| 109 | }; |
| 110 | |
| 111 | int nxp_nci_probe(void *phy_id, struct device *pdev, |
Julia Lawall | 7cf6d08 | 2015-10-11 13:24:13 +0200 | [diff] [blame] | 112 | const struct nxp_nci_phy_ops *phy_ops, |
| 113 | unsigned int max_payload, |
Clément Perrochaud | dece458 | 2015-03-09 11:12:04 +0100 | [diff] [blame] | 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 | |
| 158 | probe_exit_free_nci: |
| 159 | nci_free_device(info->ndev); |
| 160 | probe_exit: |
| 161 | return r; |
| 162 | } |
| 163 | EXPORT_SYMBOL(nxp_nci_probe); |
| 164 | |
| 165 | void 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 | } |
| 183 | EXPORT_SYMBOL(nxp_nci_remove); |
| 184 | |
| 185 | MODULE_LICENSE("GPL"); |
| 186 | MODULE_DESCRIPTION("NXP NCI NFC driver"); |
| 187 | MODULE_AUTHOR("Clément Perrochaud <clement.perrochaud@nxp.com>"); |