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174 lines
3.7 KiB
174 lines
3.7 KiB
// 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 <[email protected]> |
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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/module.h> |
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#include <linux/nfc.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 <[email protected]>");
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