linux/drivers/nfc/pn533/uart.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Driver for NXP PN532 NFC Chip - UART transport layer
 *
 * Copyright (C) 2018 Lemonage Software GmbH
 * Author: Lars Pöschel <[email protected]>
 * All rights reserved.
 */

#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/nfc.h>
#include <linux/netdevice.h>
#include <linux/of.h>
#include <linux/serdev.h>
#include "pn533.h"

#define PN532_UART_SKB_BUFF_LEN …

enum send_wakeup { … };


struct pn532_uart_phy { … };

static int pn532_uart_send_frame(struct pn533 *dev,
				struct sk_buff *out)
{ … }

static int pn532_uart_send_ack(struct pn533 *dev, gfp_t flags)
{ … }

static void pn532_uart_abort_cmd(struct pn533 *dev, gfp_t flags)
{ … }

static int pn532_dev_up(struct pn533 *dev)
{ … }

static int pn532_dev_down(struct pn533 *dev)
{ … }

static const struct pn533_phy_ops uart_phy_ops = …;

static void pn532_cmd_timeout(struct timer_list *t)
{ … }

/*
 * scans the buffer if it contains a pn532 frame. It is not checked if the
 * frame is really valid. This is later done with pn533_rx_frame_is_valid.
 * This is useful for malformed or errornous transmitted frames. Adjusts the
 * bufferposition where the frame starts, since pn533_recv_frame expects a
 * well formed frame.
 */
static int pn532_uart_rx_is_frame(struct sk_buff *skb)
{ … }

static size_t pn532_receive_buf(struct serdev_device *serdev,
				const u8 *data, size_t count)
{ … }

static const struct serdev_device_ops pn532_serdev_ops = …;

static const struct of_device_id pn532_uart_of_match[] = …;
MODULE_DEVICE_TABLE(of, pn532_uart_of_match);

static int pn532_uart_probe(struct serdev_device *serdev)
{ … }

static void pn532_uart_remove(struct serdev_device *serdev)
{ … }

static struct serdev_device_driver pn532_uart_driver = …;

module_serdev_device_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;