// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <zircon/errors.h>

#include <hid/egalax.h>

static const uint8_t egalax_touch_report_desc[] = {
    0x05, 0x0D,        // Usage Page (Digitizer)
    0x09, 0x04,        // Usage (Touch Screen)
    0xA1, 0x01,        // Collection (Application)
    0x85, 0x02,        //   Report ID (2)
    0x09, 0x20,        //   Usage (Stylus)
    0xA1, 0x00,        //   Collection (Physical)
    0x09, 0x42,        //     Usage (Tip Switch)
    0x09, 0x32,        //     Usage (In Range)
    0x15, 0x00,        //     Logical Minimum (0)
    0x25, 0x01,        //     Logical Maximum (1)
    0x95, 0x02,        //     Report Count (2)
    0x75, 0x01,        //     Report Size (1)
    0x81, 0x02,        //     Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null
                       //     Position,Non-volatile)
    0x95, 0x06,        //     Report Count (6)
    0x75, 0x01,        //     Report Size (1)
    0x81, 0x03,        //     Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null
                       //     Position,Non-volatile)
    0x05, 0x01,        //     Usage (Generic Desktop Controls)
    0x09, 0x30,        //     Usage (X)
    0x75, 0x10,        //     Report Size (16)
    0x95, 0x01,        //     Report Count (1)
    0xA4,              //     Push
    0x55, 0x0D,        //       Unit Exponent (-3)
    0x65, 0x33,        //       Unit (System: English, Length: Inch)
    0x36, 0x00, 0x00,  //       Physical Minimum (0)
    0x46, 0x99, 0x28,  //       Physical Maximum, (10393)
    0x16, 0x00, 0x00,  //       Logical Minimum (0)
    0x26, 0xFF, 0x0F,  //       Logical Maximum (4095)
    0x81, 0x02,        //       Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null
                       //       Position,Non-volatile)
    0x09, 0x31,        //       Usage (Y)
    0x16, 0x00, 0x00,  //       Logical Minimum (0)
    0x26, 0xFF, 0x0F,  //       Logical Maximum (4095)
    0x36, 0x00, 0x00,  //       Physical Minimum (0)
    0x46, 0xAF, 0x19,  //       Physical Maximum (6575)
    0x81, 0x02,        //       Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null
                       //       Position,Non-volatile)
    0xB4,              //     Pop
    0xC0,              //   End Collection
    0xC0,              // End Collection
    0x05, 0x01,        // Usage Page (Generic Desktop Ctrls)
    0x09, 0x01,        // Usage (Pointer)
    0xA1, 0x01,        // Collection (Application)
    0x85, 0x01,        //   Report ID (1)
    0x09, 0x01,        //   Usage (Pointer)
    0xA1, 0x00,        //   Collection (Physical)
    0x05, 0x09,        //   Usage Page (Button)
    0x19, 0x01,        //   Usage Minimum (1)
    0x29, 0x02,        //   Usage Maximum (2)
    0x15, 0x00,        //   Logical Minimum (0)
    0x25, 0x01,        //   Logical Maximum (1)
    0x95, 0x02,        //   Report Count (2)
    0x75, 0x01,        //   Report Size (1)
    0x81, 0x02,        //   Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null
                       //   Position,Non-volatile)
    0x95, 0x01,        //   Report Count (1)
    0x75, 0x06,        //   Report Size (6)
    0x81, 0x01,        //   Input (Data,Array,Abs,No Wrap,Linear,Preferred State,No Null
                       //   Position,Non-volatile)
    0x05, 0x01,        //   Usage Page (Generic Desktop Ctrls)
    0x09, 0x30,        //   Usage (X)
    0x09, 0x31,        //   Usage (Y)
    0x16, 0x00, 0x00,  //   Logical Minimum (0)
    0x26, 0xFF, 0x0F,  //   Logical Maximum (4095)
    0x36, 0x00, 0x00,  //   Physical Minimum (0)
    0x46, 0xFF, 0x0F,  //   Physical Maximum (4095)
    0x66, 0x00, 0x00,  //   Unit (None)
    0x75, 0x10,        //   Report Size (16)
    0x95, 0x02,        //   Report Count (2)
    0x81, 0x02,        //   Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null
                       //   Position,Non-volatile)
    0xC0,              //   End Collection
    0xC0,              // End Collection
    0x06, 0x00, 0xFF,  // Usage Page (Vendor Defined)
    0x09, 0x01,        // Usage (Pointer)
    0xA1, 0x01,        // Collection (Application)
    0x09, 0x01,        //   Usage (Pointer)
    0x15, 0x00,        //   Logical Minimum (0)
    0x26, 0xFF, 0x00,  //   Logical Maximum (255)
    0x85, 0x03,        //   Report ID (3)
    0x75, 0x08,        //   Report Size (8)
    0x95, 0x05,        //   Report Count (5)
    0x81, 0x02,        //   Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null
                       //   Position,Non-volatile)
    0x06, 0x00, 0xFF,  //   Usage Page (Vendor Defined)
    0x09, 0x01,        //   Usage (Pointer)
    0x15, 0x00,        //   Logical Minimum (0)
    0x26, 0xFF, 0x00,  //   Logical Maximum (255)
    0x75, 0x08,        //   Report Size (8)
    0x95, 0x05,        //   Report Count (5)
    0x91, 0x02,        //   Output (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null
                       //   Position,Non-volatile)
    0xC0,              // End Collection
    0x05, 0x0D,        // Usage Page (Digitizer)
    0x09, 0x04,        // Usage (Touch Screen)
    0xA1, 0x01,        // Collection (Application)
    0x85, 0x04,        //   Report ID (4)
    0x09, 0x22,        //   Usage (Finger)
    0xA1, 0x00,        //   Collection (Physical)
    0x09, 0x42,        //     Usage (Tip Switch)
    0x15, 0x00,        //     Logical Minimum (0)
    0x25, 0x01,        //     Logical Maximum (1)
    0x75, 0x01,        //     Report Size (1)
    0x95, 0x01,        //     Report Count (1)
    0x81, 0x02,        //     Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null
                       //     Position,Non-volatile)
    0x09, 0x32,        //     Usage (In Range)
    0x15, 0x00,        //     Logical Minimum (0)
    0x25, 0x01,        //     Logical Maximum (1)
    0x81, 0x02,        //     Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null
                       //     Position,Non-volatile)
    0x09, 0x51,        //     Usage (Contact Identifier)
    0x75, 0x05,        //     Report Size (5)
    0x95, 0x01,        //     Report Count (1)
    0x16, 0x00, 0x00,  //     Logical Minimum (0)
    0x26, 0x10, 0x00,  //     Logical Maximum (16)
    0x81, 0x02,        //     Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null
                       //     Position,Non-volatile)
    0x09, 0x47,        //     Usage (Confidence)
    0x75, 0x01,        //     Report Size (1)
    0x95, 0x01,        //     Report Count (1)
    0x15, 0x00,        //     Logical Minimum (0)
    0x25, 0x01,        //     Logical Maximum (1)
    0x81, 0x02,        //     Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null
                       //     Position,Non-volatile)
    0x05, 0x01,        //     Usage Page (Generic Desktop Ctrls)
    0x09, 0x30,        //     Usage (X)
    0x75, 0x10,        //     Report Size (16)
    0x95, 0x01,        //     Report Count (1)
    0x55, 0x0D,        //     Unit Exponent (-3)
    0x65, 0x33,        //     Unit (System: English, Length: Inch)
    0x35, 0x00,        //     Physical Minimum (0)
    0x46, 0x60, 0x17,  //     Physical Maximum (5984)
    0x26, 0xFF, 0x0F,  //     Logical Maximum (4095)
    0x81, 0x02,        //     Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null
                       //     Position,Non-volatile)
    0x09, 0x31,        //     Usage (Y)
    0x75, 0x10,        //     Report Size (16)
    0x95, 0x01,        //     Report Count (1)
    0x55, 0x0D,        //     Report Exponent (-3)
    0x65, 0x33,        //     Unit (System: English, Length: Inch)
    0x35, 0x00,        //     Physical Minimum (0)
    0x46, 0x26, 0x0e,  //     Physical Maximum (3622)
    0x26, 0xFF, 0x0F,  //     Logical Maximum (4095)
    0x81, 0x02,        //     Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null
                       //     Position,Non-volatile)
    0x05, 0x0D,        //     Usage Page (Digitizer)
    0x09, 0x55,        //     Usage (Max Contact Points)
    0x25, 0x08,        //     Logical Maximum (8)
    0x75, 0x08,        //     Report Size (8)
    0x95, 0x01,        //     Report Count (1)
    0xB1, 0x02,        //     Feature (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null
                       //     Position,Non-volatile)
    0xC0,              //   End Collection
    0xC0,              // End Collection
    0x05, 0x0D,        // Usage Page (Digitizer)
    0x09, 0x0E,        // Usage (Configuration)
    0xA1, 0x01,        // Collection (Application)
    0x85, 0x05,        //   Report ID (5)
    0x09, 0x22,        //   Usage (Finger)
    0xA1, 0x00,        //   Collection (Physical)
    0x09, 0x52,        //     Usage (Device Mode)
    0x09, 0x53,        //     Usage (Device Index)
    0x15, 0x00,        //     Logical Minimum (0)
    0x25, 0x0A,        //     Logical Maximum (10)
    0x75, 0x08,        //     Report Size (8)
    0x95, 0x02,        //     Report Count (2)
    0xB1, 0x02,        //     Feature (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null
                       //     Position,Non-volatile)
    0xC0,              //   End Collection
    0xC0               // End Collection
                       // 322 bytes
};

bool is_egalax_touchscreen_report_desc(const uint8_t* data, size_t len) {
  if (!data)
    return false;

  if (len != sizeof(egalax_touch_report_desc)) {
    return false;
  }

  return (memcmp(data, egalax_touch_report_desc, len) == 0);
}

const uint8_t* get_egalax_touch_report_desc(size_t* len) {
  *len = sizeof(egalax_touch_report_desc);
  return egalax_touch_report_desc;
}

zx_status_t setup_egalax_touchscreen(int fd) {
  if (fd < 0)
    return ZX_ERR_INVALID_ARGS;

  return ZX_OK;
}