linux-imx

/*

 * Simple USB RGB LED driver

 *

 * Copyright 2016 Heiner Kallweit <hkallweit1@gmail.com>

 * Based on drivers/hid/hid-thingm.c and

 * drivers/usb/misc/usbled.c

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License as

 * published by the Free Software Foundation, version 2.

 */

​

#include <linux/hid.h>

#include <linux/hidraw.h>

#include <linux/leds.h>

#include <linux/module.h>

#include <linux/mutex.h>

​

#include "hid-ids.h"

​

enum hidled_report_type {

    RAW_REQUEST,

    OUTPUT_REPORT

};

​

enum hidled_type {

    RISO_KAGAKU,

    DREAM_CHEEKY,

    THINGM,

    DELCOM,

    LUXAFOR,

};

​

static unsigned const char riso_kagaku_tbl[] = {

/* R+2G+4B -> riso kagaku color index */

    [0] = 0, /* black   */

    [1] = 2, /* red     */

    [2] = 1, /* green   */

    [3] = 5, /* yellow  */

    [4] = 3, /* blue    */

    [5] = 6, /* magenta */

    [6] = 4, /* cyan    */

    [7] = 7  /* white   */

};

​

#define RISO_KAGAKU_IX(r, g, b) riso_kagaku_tbl[((r)?1:0)+((g)?2:0)+((b)?4:0)]

​

union delcom_packet {

    __u8 data[8];

    struct {

        __u8 major_cmd;

        __u8 minor_cmd;

        __u8 data_lsb;

        __u8 data_msb;

    } tx;

    struct {

        __u8 cmd;

    } rx;

    struct {

        __le16 family_code;

        __le16 security_code;

        __u8 fw_version;

    } fw;

};

​

#define DELCOM_GREEN_LED    0

#define DELCOM_RED_LED      1

#define DELCOM_BLUE_LED     2

​

struct hidled_device;

struct hidled_rgb;

​

struct hidled_config {

    enum hidled_type    type;

    const char      *name;

    const char      *short_name;

    enum led_brightness max_brightness;

    int         num_leds;

    size_t          report_size;

    enum hidled_report_type report_type;

    int (*init)(struct hidled_device *ldev);

    int (*write)(struct led_classdev *cdev, enum led_brightness br);

};

​

struct hidled_led {

    struct led_classdev cdev;

    struct hidled_rgb   *rgb;

    char            name[32];

};

​

struct hidled_rgb {

    struct hidled_device    *ldev;