linux-imx

/* SPDX-License-Identifier: GPL-2.0-or-later */

/*

 * Driver for Feature Integration Technology Inc. (aka Fintek) LPC CIR

 *

 * Copyright (C) 2011 Jarod Wilson <jarod@redhat.com>

 *

 * Special thanks to Fintek for providing hardware and spec sheets.

 * This driver is based upon the nuvoton, ite and ene drivers for

 * similar hardware.

 */

​

#include <linux/spinlock.h>

#include <linux/ioctl.h>

​

/* platform driver name to register */

#define FINTEK_DRIVER_NAME  "fintek-cir"

#define FINTEK_DESCRIPTION  "Fintek LPC SuperIO Consumer IR Transceiver"

#define VENDOR_ID_FINTEK    0x1934

​

​

/* debugging module parameter */

static int debug;

​

#define fit_pr(level, text, ...) \

    printk(level KBUILD_MODNAME ": " text, ## __VA_ARGS__)

​

#define fit_dbg(text, ...) \

    if (debug) \

        printk(KERN_DEBUG \

            KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)

​

#define fit_dbg_verbose(text, ...) \

    if (debug > 1) \

        printk(KERN_DEBUG \

            KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)

​

#define fit_dbg_wake(text, ...) \

    if (debug > 2) \

        printk(KERN_DEBUG \

            KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)

​

​

#define TX_BUF_LEN 256

#define RX_BUF_LEN 32

​

struct fintek_dev {

    struct pnp_dev *pdev;

    struct rc_dev *rdev;

​

    spinlock_t fintek_lock;

​

    /* for rx */

    u8 buf[RX_BUF_LEN];

    unsigned int pkts;

​

    struct {

        spinlock_t lock;

        u8 buf[TX_BUF_LEN];

        unsigned int buf_count;

        unsigned int cur_buf_num;

        wait_queue_head_t queue;

    } tx;

​

    /* Config register index/data port pair */

    u32 cr_ip;

    u32 cr_dp;

​

    /* hardware I/O settings */

    unsigned long cir_addr;

    int cir_irq;

    int cir_port_len;

​

    /* hardware id */

    u8 chip_major;

    u8 chip_minor;

    u16 chip_vendor;

    u8 logical_dev_cir;

​

    /* hardware features */

    bool hw_learning_capable;

    bool hw_tx_capable;

​

    /* rx settings */

    bool learning_enabled;

    bool carrier_detect_enabled;

​

    enum {

        CMD_HEADER = 0,

        SUBCMD,

        CMD_DATA,

        PARSE_IRDATA,

    } parser_state;