166 lines
3.9 KiB
C
166 lines
3.9 KiB
C
/*
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* Marvell NFC driver: major functions
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*
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* Copyright (C) 2014, Marvell International Ltd.
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*
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* This software file (the "File") is distributed by Marvell International
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* Ltd. under the terms of the GNU General Public License Version 2, June 1991
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* (the "License"). You may use, redistribute and/or modify this File in
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* accordance with the terms and conditions of the License, a copy of which
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* is available on the worldwide web at
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
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*
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* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
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* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
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* this warranty disclaimer.
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*/
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#include <linux/module.h>
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#include <linux/nfc.h>
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#include <net/nfc/nci.h>
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#include <net/nfc/nci_core.h>
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#include "nfcmrvl.h"
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#define VERSION "1.0"
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static int nfcmrvl_nci_open(struct nci_dev *ndev)
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{
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struct nfcmrvl_private *priv = nci_get_drvdata(ndev);
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int err;
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if (test_and_set_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
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return 0;
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err = priv->if_ops->nci_open(priv);
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if (err)
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clear_bit(NFCMRVL_NCI_RUNNING, &priv->flags);
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return err;
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}
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static int nfcmrvl_nci_close(struct nci_dev *ndev)
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{
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struct nfcmrvl_private *priv = nci_get_drvdata(ndev);
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if (!test_and_clear_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
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return 0;
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priv->if_ops->nci_close(priv);
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return 0;
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}
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static int nfcmrvl_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
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{
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struct nfcmrvl_private *priv = nci_get_drvdata(ndev);
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nfc_info(priv->dev, "send entry, len %d\n", skb->len);
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skb->dev = (void *)ndev;
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if (!test_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
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return -EBUSY;
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return priv->if_ops->nci_send(priv, skb);
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}
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static int nfcmrvl_nci_setup(struct nci_dev *ndev)
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{
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__u8 val;
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val = NFCMRVL_GPIO_PIN_NFC_NOT_ALLOWED;
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nci_set_config(ndev, NFCMRVL_NOT_ALLOWED_ID, 1, &val);
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val = NFCMRVL_GPIO_PIN_NFC_ACTIVE;
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nci_set_config(ndev, NFCMRVL_ACTIVE_ID, 1, &val);
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val = NFCMRVL_EXT_COEX_ENABLE;
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nci_set_config(ndev, NFCMRVL_EXT_COEX_ID, 1, &val);
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return 0;
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}
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static struct nci_ops nfcmrvl_nci_ops = {
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.open = nfcmrvl_nci_open,
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.close = nfcmrvl_nci_close,
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.send = nfcmrvl_nci_send,
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.setup = nfcmrvl_nci_setup,
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};
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struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data,
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struct nfcmrvl_if_ops *ops,
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struct device *dev)
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{
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struct nfcmrvl_private *priv;
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int rc;
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u32 protocols;
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return ERR_PTR(-ENOMEM);
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priv->drv_data = drv_data;
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priv->if_ops = ops;
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priv->dev = dev;
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protocols = NFC_PROTO_JEWEL_MASK
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| NFC_PROTO_MIFARE_MASK | 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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priv->ndev = nci_allocate_device(&nfcmrvl_nci_ops, protocols, 0, 0);
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if (!priv->ndev) {
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nfc_err(dev, "nci_allocate_device failed");
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rc = -ENOMEM;
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goto error;
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}
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nci_set_drvdata(priv->ndev, priv);
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rc = nci_register_device(priv->ndev);
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if (rc) {
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nfc_err(dev, "nci_register_device failed %d", rc);
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nci_free_device(priv->ndev);
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goto error;
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}
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nfc_info(dev, "registered with nci successfully\n");
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return priv;
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error:
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kfree(priv);
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return ERR_PTR(rc);
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}
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EXPORT_SYMBOL_GPL(nfcmrvl_nci_register_dev);
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void nfcmrvl_nci_unregister_dev(struct nfcmrvl_private *priv)
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{
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struct nci_dev *ndev = priv->ndev;
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nci_unregister_device(ndev);
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nci_free_device(ndev);
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kfree(priv);
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}
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EXPORT_SYMBOL_GPL(nfcmrvl_nci_unregister_dev);
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int nfcmrvl_nci_recv_frame(struct nfcmrvl_private *priv, void *data, int count)
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{
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struct sk_buff *skb;
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skb = nci_skb_alloc(priv->ndev, count, GFP_ATOMIC);
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if (!skb)
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return -ENOMEM;
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memcpy(skb_put(skb, count), data, count);
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nci_recv_frame(priv->ndev, skb);
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return count;
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}
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EXPORT_SYMBOL_GPL(nfcmrvl_nci_recv_frame);
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MODULE_AUTHOR("Marvell International Ltd.");
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MODULE_DESCRIPTION("Marvell NFC driver ver " VERSION);
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MODULE_VERSION(VERSION);
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MODULE_LICENSE("GPL v2");
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