linux-imx

/*

 * NFC hardware simulation driver

 * Copyright (c) 2013, Intel Corporation.

 *

 * 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 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.

 *

 */

​

#include <linux/device.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/ctype.h>

#include <linux/debugfs.h>

#include <linux/nfc.h>

#include <net/nfc/nfc.h>

#include <net/nfc/digital.h>

​

#define NFCSIM_ERR(d, fmt, args...) nfc_err(&d->nfc_digital_dev->nfc_dev->dev, \

                        "%s: " fmt, __func__, ## args)

​

#define NFCSIM_DBG(d, fmt, args...) dev_dbg(&d->nfc_digital_dev->nfc_dev->dev, \

                        "%s: " fmt, __func__, ## args)

​

#define NFCSIM_VERSION "0.2"

​

#define NFCSIM_MODE_NONE    0

#define NFCSIM_MODE_INITIATOR   1

#define NFCSIM_MODE_TARGET  2

​

#define NFCSIM_CAPABILITIES (NFC_DIGITAL_DRV_CAPS_IN_CRC   | \

                 NFC_DIGITAL_DRV_CAPS_TG_CRC)

​

struct nfcsim {

    struct nfc_digital_dev *nfc_digital_dev;

​

    struct work_struct recv_work;

    struct delayed_work send_work;

​

    struct nfcsim_link *link_in;

    struct nfcsim_link *link_out;

​

    bool up;

    u8 mode;

    u8 rf_tech;

​

    u16 recv_timeout;

​

    nfc_digital_cmd_complete_t cb;

    void *arg;

​

    u8 dropframe;

};

​

struct nfcsim_link {

    struct mutex lock;

​

    u8 rf_tech;

    u8 mode;

​

    u8 shutdown;

​

    struct sk_buff *skb;

    wait_queue_head_t recv_wait;

    u8 cond;

};

​

static struct nfcsim_link *nfcsim_link_new(void)

{

    struct nfcsim_link *link;

​

    link = kzalloc(sizeof(struct nfcsim_link), GFP_KERNEL);

    if (!link)

        return NULL;

​

    mutex_init(&link->lock);

    init_waitqueue_head(&link->recv_wait);

​

    return link;

}

​

static void nfcsim_link_free(struct nfcsim_link *link)

{

    dev_kfree_skb(link->skb);

    kfree(link);

}