/* * NCI based Driver for STMicroelectronics NFC Chip * * Copyright (C) 2014-2015 STMicroelectronics SAS. All rights reserved. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include <linux/module.h> #include <linux/nfc.h> #include <net/nfc/nci.h> #include <net/nfc/nci_core.h> #include <linux/gpio.h> #include <linux/delay.h> #include "st-nci.h" #define DRIVER_DESC "NCI NFC driver for ST_NCI" #define ST_NCI1_X_PROPRIETARY_ISO15693 0x83 static int st_nci_init(struct nci_dev *ndev) { struct nci_mode_set_cmd cmd; cmd.cmd_type = ST_NCI_SET_NFC_MODE; cmd.mode = 1; return nci_prop_cmd(ndev, ST_NCI_CORE_PROP, sizeof(struct nci_mode_set_cmd), (__u8 *)&cmd); } static int st_nci_open(struct nci_dev *ndev) { struct st_nci_info *info = nci_get_drvdata(ndev); int r; if (test_and_set_bit(ST_NCI_RUNNING, &info->flags)) return 0; r = ndlc_open(info->ndlc); if (r) clear_bit(ST_NCI_RUNNING, &info->flags); return r; } static int st_nci_close(struct nci_dev *ndev) { struct st_nci_info *info = nci_get_drvdata(ndev); if (!test_bit(ST_NCI_RUNNING, &info->flags)) return 0; ndlc_close(info->ndlc); clear_bit(ST_NCI_RUNNING, &info->flags); return 0; } static int st_nci_send(struct nci_dev *ndev, struct sk_buff *skb) { struct st_nci_info *info = nci_get_drvdata(ndev); skb->dev = (void *)ndev; if (!test_bit(ST_NCI_RUNNING, &info->flags)) return -EBUSY; return ndlc_send(info->ndlc, skb); } static __u32 st_nci_get_rfprotocol(struct nci_dev *ndev, __u8 rf_protocol) { return rf_protocol == ST_NCI1_X_PROPRIETARY_ISO15693 ? NFC_PROTO_ISO15693_MASK : 0; } static int st_nci_prop_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) { __u8 status = skb->data[0]; nci_req_complete(ndev, status); return 0; } static struct nci_driver_ops st_nci_prop_ops[] = { { .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, ST_NCI_CORE_PROP), .rsp = st_nci_prop_rsp_packet, }, }; static struct nci_ops st_nci_ops = { .init = st_nci_init, .open = st_nci_open, .close = st_nci_close, .send = st_nci_send, .get_rfprotocol = st_nci_get_rfprotocol, .discover_se = st_nci_discover_se, .enable_se = st_nci_enable_se, .disable_se = st_nci_disable_se, .se_io = st_nci_se_io, .hci_load_session = st_nci_hci_load_session, .hci_event_received = st_nci_hci_event_received, .hci_cmd_received = st_nci_hci_cmd_received, .prop_ops = st_nci_prop_ops, .n_prop_ops = ARRAY_SIZE(st_nci_prop_ops), }; int st_nci_probe(struct llt_ndlc *ndlc, int phy_headroom, int phy_tailroom, struct st_nci_se_status *se_status) { struct st_nci_info *info; int r; u32 protocols; info = devm_kzalloc(ndlc->dev, sizeof(struct st_nci_info), GFP_KERNEL); if (!info) return -ENOMEM; protocols = NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK | NFC_PROTO_ISO14443_B_MASK | NFC_PROTO_ISO15693_MASK | NFC_PROTO_NFC_DEP_MASK; ndlc->ndev = nci_allocate_device(&st_nci_ops, protocols, phy_headroom, phy_tailroom); if (!ndlc->ndev) { pr_err("Cannot allocate nfc ndev\n"); return -ENOMEM; } info->ndlc = ndlc; nci_set_drvdata(ndlc->ndev, info); r = st_nci_vendor_cmds_init(ndlc->ndev); if (r) { pr_err("Cannot register proprietary vendor cmds\n"); goto err_reg_dev; } r = nci_register_device(ndlc->ndev); if (r) { pr_err("Cannot register nfc device to nci core\n"); goto err_reg_dev; } return st_nci_se_init(ndlc->ndev, se_status); err_reg_dev: nci_free_device(ndlc->ndev); return r; } EXPORT_SYMBOL_GPL(st_nci_probe); void st_nci_remove(struct nci_dev *ndev) { struct st_nci_info *info = nci_get_drvdata(ndev); ndlc_close(info->ndlc); nci_unregister_device(ndev); nci_free_device(ndev); } EXPORT_SYMBOL_GPL(st_nci_remove); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION(DRIVER_DESC);