46fe777164
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 33 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190531081038.745679586@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
177 lines
3.7 KiB
C
177 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Generic driver for NXP NCI NFC chips
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*
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* Copyright (C) 2014 NXP Semiconductors All rights reserved.
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*
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* Authors: Clément Perrochaud <clement.perrochaud@nxp.com>
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*
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* Derived from PN544 device driver:
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* Copyright (C) 2012 Intel Corporation. All rights reserved.
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*/
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <linux/module.h>
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#include <linux/nfc.h>
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#include <linux/platform_data/nxp-nci.h>
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#include <net/nfc/nci_core.h>
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#include "nxp-nci.h"
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#define NXP_NCI_HDR_LEN 4
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#define NXP_NCI_NFC_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
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NFC_PROTO_MIFARE_MASK | \
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NFC_PROTO_FELICA_MASK | \
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NFC_PROTO_ISO14443_MASK | \
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NFC_PROTO_ISO14443_B_MASK | \
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NFC_PROTO_NFC_DEP_MASK)
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static int nxp_nci_open(struct nci_dev *ndev)
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{
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struct nxp_nci_info *info = nci_get_drvdata(ndev);
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int r = 0;
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mutex_lock(&info->info_lock);
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if (info->mode != NXP_NCI_MODE_COLD) {
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r = -EBUSY;
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goto open_exit;
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}
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if (info->phy_ops->set_mode)
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r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_NCI);
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info->mode = NXP_NCI_MODE_NCI;
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open_exit:
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mutex_unlock(&info->info_lock);
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return r;
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}
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static int nxp_nci_close(struct nci_dev *ndev)
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{
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struct nxp_nci_info *info = nci_get_drvdata(ndev);
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int r = 0;
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mutex_lock(&info->info_lock);
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if (info->phy_ops->set_mode)
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r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
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info->mode = NXP_NCI_MODE_COLD;
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mutex_unlock(&info->info_lock);
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return r;
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}
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static int nxp_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
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{
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struct nxp_nci_info *info = nci_get_drvdata(ndev);
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int r;
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if (!info->phy_ops->write) {
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r = -ENOTSUPP;
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goto send_exit;
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}
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if (info->mode != NXP_NCI_MODE_NCI) {
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r = -EINVAL;
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goto send_exit;
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}
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r = info->phy_ops->write(info->phy_id, skb);
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if (r < 0)
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kfree_skb(skb);
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send_exit:
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return r;
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}
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static struct nci_ops nxp_nci_ops = {
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.open = nxp_nci_open,
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.close = nxp_nci_close,
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.send = nxp_nci_send,
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.fw_download = nxp_nci_fw_download,
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};
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int nxp_nci_probe(void *phy_id, struct device *pdev,
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const struct nxp_nci_phy_ops *phy_ops,
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unsigned int max_payload,
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struct nci_dev **ndev)
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{
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struct nxp_nci_info *info;
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int r;
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info = devm_kzalloc(pdev, sizeof(struct nxp_nci_info), GFP_KERNEL);
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if (!info) {
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r = -ENOMEM;
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goto probe_exit;
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}
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info->phy_id = phy_id;
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info->pdev = pdev;
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info->phy_ops = phy_ops;
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info->max_payload = max_payload;
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INIT_WORK(&info->fw_info.work, nxp_nci_fw_work);
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init_completion(&info->fw_info.cmd_completion);
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mutex_init(&info->info_lock);
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if (info->phy_ops->set_mode) {
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r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
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if (r < 0)
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goto probe_exit;
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}
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info->mode = NXP_NCI_MODE_COLD;
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info->ndev = nci_allocate_device(&nxp_nci_ops, NXP_NCI_NFC_PROTOCOLS,
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NXP_NCI_HDR_LEN, 0);
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if (!info->ndev) {
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r = -ENOMEM;
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goto probe_exit;
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}
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nci_set_parent_dev(info->ndev, pdev);
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nci_set_drvdata(info->ndev, info);
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r = nci_register_device(info->ndev);
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if (r < 0)
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goto probe_exit_free_nci;
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*ndev = info->ndev;
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goto probe_exit;
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probe_exit_free_nci:
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nci_free_device(info->ndev);
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probe_exit:
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return r;
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}
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EXPORT_SYMBOL(nxp_nci_probe);
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void nxp_nci_remove(struct nci_dev *ndev)
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{
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struct nxp_nci_info *info = nci_get_drvdata(ndev);
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if (info->mode == NXP_NCI_MODE_FW)
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nxp_nci_fw_work_complete(info, -ESHUTDOWN);
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cancel_work_sync(&info->fw_info.work);
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mutex_lock(&info->info_lock);
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if (info->phy_ops->set_mode)
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info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
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nci_unregister_device(ndev);
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nci_free_device(ndev);
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mutex_unlock(&info->info_lock);
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}
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EXPORT_SYMBOL(nxp_nci_remove);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("NXP NCI NFC driver");
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MODULE_AUTHOR("Clément Perrochaud <clement.perrochaud@nxp.com>");
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