#include <linux/kernel.h>
#include <linux/input.h>
#include "hid-simple.h"

#define DRIVER_DESC "HID simple device example #1"
#define DRIVER_VERSION "0.1.0"

/* For BETOP BTP-C033 joystick (A popluar product in China market) */
#define SAMPLE_ID_VENDOR        0x0e8f
#define SAMPLE_ID_PRODUCT        0x0003

struct sample_device {
        struct hidinput_simple_device device;
};

static struct usb_device_id __id[] = {
        {
                USB_DEVICE(SAMPLE_ID_VENDOR, SAMPLE_ID_PRODUCT)
        },
        {0, }
};

MODULE_DEVICE_TABLE(usb, __id);

static char device_name[] = "The sample of HID simple device #1";

static void sample_setup_usage(struct hid_field *field,        struct hid_usage *usage)
{
        struct input_dev *input = &field->hidinput->input;
        
        if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
                set_bit(EV_REP, input->evbit);
}

static void sample_clear_usage(struct hid_field *field,        struct hid_usage *usage)
{
        struct input_dev *input = &field->hidinput->input;
        
        if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
                clear_bit(EV_REP, input->evbit);
}

static struct sample_device sample_device = {
        .device = {
        .name                = device_name,
        .setup_usage = sample_setup_usage,
        .clear_usage = sample_clear_usage,        
        .id        =        {
                        { USB_DEVICE(SAMPLE_ID_VENDOR, SAMPLE_ID_PRODUCT) }, {}
                }
        }
};

static int __init sample_init(void)
{
        int result = hidinput_register_simple_device(&sample_device.device);

        if (result == 1) {
                /*
                 * The device that matched is busy, this can see as one error, 
                 * but we bypass it in this sample.
                 */
                printk("hid device busy\n");
        }
        if (result >= 0)
                info(DRIVER_DESC ":" DRIVER_VERSION);
        return 0;
}

static void __exit sample_exit(void)
{
        hidinput_unregister_simple_device(&sample_device.device);
}

module_init(sample_init);
module_exit(sample_exit);

MODULE_LICENSE("GPL");

/* The sample showed, the sample use simple interface is simple :) */