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segatools/mercuryhook/touch.c

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#include <windows.h>
#include <assert.h>
#include <process.h>
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include "board/slider-cmd.h"
#include "board/slider-frame.h"
#include "mercuryhook/mercury-dll.h"
#include "mercuryhook/touch.h"
#include "hook/iobuf.h"
#include "hook/iohook.h"
#include "hooklib/uart.h"
#include "hooklib/fdshark.h"
#include "util/dprintf.h"
#include "util/dump.h"
const char SYNC_BOARD_VER[6] = "190523";
const char UNIT_BOARD_VER[6] = "190514";
static HRESULT touch_handle_irp(struct irp *irp);
static HRESULT touch0_handle_irp_locked(struct irp *irp);
static HRESULT touch1_handle_irp_locked(struct irp *irp);
static HRESULT touch_req_dispatch(const struct touch_req *req);
static HRESULT touch_frame_decode(struct touch_req *dest, struct iobuf *iobuf, int side);
static uint8_t calc_checksum(const void *ptr, size_t nbytes);
static HRESULT touch_handle_get_sync_board_ver(const struct touch_req *req);
static HRESULT touch_handle_next_read(const struct touch_req *req);
static HRESULT touch_handle_get_unit_board_ver(const struct touch_req *req);
static HRESULT touch_handle_mystery1(const struct touch_req *req);
static HRESULT touch_handle_mystery2(const struct touch_req *req);
static HRESULT touch_handle_start_auto_scan(const struct touch_req *req);
static void touch_res_auto_scan(const bool *state);
uint8_t input_frame_count_0 = 0x7b;
uint8_t input_frame_count_1 = 0x7b;
bool touch0_auto = false;
bool touch1_auto = false;
static CRITICAL_SECTION touch0_lock;
static struct uart touch0_uart;
static uint8_t touch0_written_bytes[520];
static uint8_t touch0_readable_bytes[520];
static CRITICAL_SECTION touch1_lock;
static struct uart touch1_uart;
static uint8_t touch1_written_bytes[520];
static uint8_t touch1_readable_bytes[520];
HRESULT touch_hook_init(const struct touch_config *cfg)
{
assert(cfg != NULL);
assert(mercury_dll.touch_init != NULL);
if (!cfg->enable) {
return S_FALSE;
}
InitializeCriticalSection(&touch0_lock);
InitializeCriticalSection(&touch1_lock);
dprintf("Wacca touch: Init\n");
uart_init(&touch0_uart, 3);
touch0_uart.written.bytes = touch0_written_bytes;
touch0_uart.written.nbytes = sizeof(touch0_written_bytes);
touch0_uart.readable.bytes = touch0_readable_bytes;
touch0_uart.readable.nbytes = sizeof(touch0_readable_bytes);
uart_init(&touch1_uart, 4);
touch1_uart.written.bytes = touch1_written_bytes;
touch1_uart.written.nbytes = sizeof(touch1_written_bytes);
touch1_uart.readable.bytes = touch1_readable_bytes;
touch1_uart.readable.nbytes = sizeof(touch1_readable_bytes);
return iohook_push_handler(touch_handle_irp);
}
static HRESULT touch_handle_irp(struct irp *irp)
{
HRESULT hr;
assert(irp != NULL);
if (uart_match_irp(&touch0_uart, irp)) {
EnterCriticalSection(&touch0_lock);
hr = touch0_handle_irp_locked(irp);
LeaveCriticalSection(&touch0_lock);
}
else if (uart_match_irp(&touch1_uart, irp)) {
EnterCriticalSection(&touch1_lock);
hr = touch1_handle_irp_locked(irp);
LeaveCriticalSection(&touch1_lock);
}
else {
return iohook_invoke_next(irp);
}
return hr;
}
static HRESULT touch0_handle_irp_locked(struct irp *irp)
{
struct touch_req req;
HRESULT hr;
if (irp->op == IRP_OP_OPEN) {
dprintf("Wacca touch0: Starting backend\n");
hr = mercury_dll.touch_init();
if (FAILED(hr)) {
dprintf("Wacca touch: Backend error: %x\n", (int) hr);
return hr;
}
}
hr = uart_handle_irp(&touch0_uart, irp);
if (FAILED(hr) || irp->op != IRP_OP_WRITE) {
return hr;
}
for (;;) {
#if 0
dprintf("TX0 Buffer:\n");
dump_iobuf(&touch0_uart.written);
#endif
hr = touch_frame_decode(&req, &touch0_uart.written, 0);
if (hr != S_OK) {
if (FAILED(hr)) {
dprintf("Wacca touch: Deframe error: %x\n", (int) hr);
}
return hr;
}
hr = touch_req_dispatch(&req);
if (FAILED(hr)) {
dprintf("Wacca touch: Processing error: %x\n", (int) hr);
}
return hr;
}
}
static HRESULT touch1_handle_irp_locked(struct irp *irp)
{
struct touch_req req;
HRESULT hr;
if (irp->op == IRP_OP_OPEN) {
dprintf("Wacca touch1: Starting backend\n");
hr = mercury_dll.touch_init();
if (FAILED(hr)) {
dprintf("Wacca touch: Backend error: %x\n", (int) hr);
return hr;
}
}
hr = uart_handle_irp(&touch1_uart, irp);
if (FAILED(hr) || irp->op != IRP_OP_WRITE) {
return hr;
}
for (;;) {
#if 0
dprintf("TX1 Buffer:\n");
dump_iobuf(&touch1_uart.written);
#endif
hr = touch_frame_decode(&req, &touch1_uart.written, 1);
if (hr != S_OK) {
if (FAILED(hr)) {
dprintf("Wacca touch: Deframe error: %x\n", (int) hr);
}
return hr;
}
hr = touch_req_dispatch(&req);
if (FAILED(hr)) {
dprintf("Wacca touch: Processing error: %x\n", (int) hr);
}
return hr;
}
}
static HRESULT touch_req_dispatch(const struct touch_req *req)
{
switch (req->cmd) {
case CMD_GET_SYNC_BOARD_VER:
return touch_handle_get_sync_board_ver(req);
case CMD_NEXT_READ:
return touch_handle_next_read(req);
case CMD_GET_UNIT_BOARD_VER:
return touch_handle_get_unit_board_ver(req);
case CMD_MYSTERY1:
return touch_handle_mystery1(req);
case CMD_MYSTERY2:
return touch_handle_mystery2(req);
case CMD_START_AUTO_SCAN:
return touch_handle_start_auto_scan(req);
case CMD_BEGIN_WRITE:
dprintf("Wacca touch: Begin write for side %d\n", req->side);
return S_OK;
case CMD_NEXT_WRITE:
dprintf("Wacca touch: continue write for side %d\n", req->side);
return S_OK;
default:
dprintf("Wacca touch: Unhandled command %02x\n", req->cmd);
return S_OK;
}
}
static HRESULT touch_handle_get_sync_board_ver(const struct touch_req *req)
{
struct touch_resp_get_sync_board_ver resp;
HRESULT hr;
memset(&resp, 0, sizeof(resp));
dprintf("Wacca Touch%d: Get sync board version\n", req->side);
resp.cmd = 0xa0;
memcpy(resp.version, SYNC_BOARD_VER, sizeof(SYNC_BOARD_VER));
resp.checksum = 0;
resp.checksum = calc_checksum(&resp, sizeof(resp));
if (req->side == 0) {
hr = iobuf_write(&touch0_uart.readable, &resp, sizeof(resp));
}
else {
hr = iobuf_write(&touch1_uart.readable, &resp, sizeof(resp));
}
return hr;
}
static HRESULT touch_handle_next_read(const struct touch_req *req)
{
struct touch_resp_startup resp;
HRESULT hr;
char *rev;
memset(&resp, 0, sizeof(resp));
dprintf("Wacca Touch%d: Read section %2hx\n", req->side, req->data[2]);
switch (req->data[2]) {
// These can be found in the config file
case 0x30:
rev = " 0 0 1 2 3 4 5 15 15 15 15 15 15 11 11 11";
break;
case 0x31:
rev = " 11 11 11 128 103 103 115 138 127 103 105 111 126 113 95 100";
break;
case 0x33:
rev = " 101 115 98 86 76 67 68 48 117 0 82 154 0 6 35 4";
break;
default:
dprintf("Wacca touch: BAD READ REQUEST %2hx\n", req->data[2]);
return 1;
}
memcpy(resp.data, rev, 80 * sizeof(char));
resp.checksum = 0;
resp.checksum = calc_checksum(&resp, sizeof(resp));
if (req->side == 0) {
hr = iobuf_write(&touch0_uart.readable, &resp, sizeof(resp));
}
else {
hr = iobuf_write(&touch1_uart.readable, &resp, sizeof(resp));
}
return hr;
}
static HRESULT touch_handle_get_unit_board_ver(const struct touch_req *req)
{
struct touch_resp_get_unit_board_ver resp;
HRESULT hr;
memset(&resp, 0, sizeof(resp));
dprintf("Wacca Touch%d: get unit board version\n", req->side);
memset(resp.version, 0, sizeof(resp.version));
memcpy(resp.version, SYNC_BOARD_VER, sizeof(SYNC_BOARD_VER));
for (int i = 0; i < 6; i++ )
memcpy(&resp.version[7 + (6 * i)], UNIT_BOARD_VER, sizeof(UNIT_BOARD_VER));
resp.cmd = 0xa8;
resp.checksum = 0;
if (req->side == 0) {
resp.version[6] = 'R';
resp.checksum = calc_checksum(&resp, sizeof(resp));
#if 0
for (int i = 0; i < sizeof(resp.version); i++) {
dprintf("0x%02x ", resp.version[i]);
}
dprintf("\n");
#endif
hr = iobuf_write(&touch0_uart.readable, &resp, sizeof(resp));
}
else {
resp.version[6] = 'L';
resp.checksum = calc_checksum(&resp, sizeof(resp));
#if 0
for (int i = 0; i < sizeof(resp.version); i++) {
dprintf("0x%02x ", resp.version[i]);
}
dprintf("\n");
#endif
hr = iobuf_write(&touch1_uart.readable, &resp, sizeof(resp));
}
return hr;
}
static HRESULT touch_handle_mystery1(const struct touch_req *req)
{
struct touch_resp_mystery1 resp;
HRESULT hr;
memset(&resp, 0, sizeof(resp));
dprintf("Wacca Touch%d: Command A2\n", req->side);
resp.cmd = 0xa2;
resp.data = 0x3f;
resp.checksum = 0;
resp.checksum = calc_checksum(&resp, sizeof(resp));
if (req->side == 0) {
hr = iobuf_write(&touch0_uart.readable, &resp, sizeof(resp));
}
else {
hr = iobuf_write(&touch1_uart.readable, &resp, sizeof(resp));
}
return hr;
}
static HRESULT touch_handle_mystery2(const struct touch_req *req)
{
struct touch_resp_mystery2 resp;
HRESULT hr;
memset(&resp, 0, sizeof(resp));
dprintf("Wacca Touch%d: Command 94\n", req->side);
resp.cmd = 0x94;
resp.data = 0;
resp.checksum = 0;
resp.checksum = calc_checksum(&resp, sizeof(resp));
if (req->side == 0) {
hr = iobuf_write(&touch0_uart.readable, &resp, sizeof(resp));
}
else {
hr = iobuf_write(&touch1_uart.readable, &resp, sizeof(resp));
}
return hr;
}
static HRESULT touch_handle_start_auto_scan(const struct touch_req *req)
{
struct touch_resp_start_auto resp;
HRESULT hr;
uint8_t data1[24] = { 0 };
// Unsure what this does. It seems to change every request on a real board,
// but the game doesn't seem to mind that it's the same
uint8_t data2[9] = { 0x0d, 0x03, 0x02, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00 };
dprintf("Wacca Touch%d: Start Auto", req->side);
#if 0
for (int i = 0; i < req->data_length; i++)
dprintf("0x%02x ", req->data[i]);
#endif
dprintf("\n");
resp.cmd = 0x9c;
resp.data = 0;
resp.checksum = 0x49;
resp.frame.cmd= 0x81;
memcpy(resp.frame.data1, data1, sizeof(data1));
memcpy(resp.frame.data2, data2, sizeof(data2));
resp.frame.checksum = 0;
resp.frame.checksum = calc_checksum(&resp.frame, sizeof(resp.frame));
if (req->side == 0) {
resp.frame.count = input_frame_count_0++;
hr = iobuf_write(&touch0_uart.readable, &resp, sizeof(resp));
touch0_auto = true;
}
else {
resp.frame.count = input_frame_count_1++;
hr = iobuf_write(&touch1_uart.readable, &resp, sizeof(resp));
touch1_auto = true;
}
mercury_dll.touch_start(touch_res_auto_scan);
return hr;
}
static void touch_res_auto_scan(const bool *state)
{
struct touch_input_frame frame0;
struct touch_input_frame frame1;
memset(&frame0, 0, sizeof(frame0));
memset(&frame1, 0, sizeof(frame1));
uint8_t dataR[24] = { 0 };
uint8_t dataL[24] = { 0 };
// this changes every input on a real board but
// the game doesn't seem to care about it...
uint8_t data2[9] = { 0x0d, 0x03, 0x02, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00 };
uint8_t counter = 0;
frame0.cmd = 0x81;
frame0.count = input_frame_count_0++;
input_frame_count_0 %= 0x7f;
frame1.cmd = 0x81;
frame1.count = input_frame_count_1++;
input_frame_count_1 %= 0x7f;
for (int i = 0; i < 24; i++) {
for (int j = 0; j < 5; j++) {
if (state[counter]) {
dataR[i] |= (1 << j);
}
if (state[counter+120]) {
dataL[i] |= (1 << j);
}
counter++;
}
}
memcpy(frame0.data1, dataR, sizeof(dataR));
memcpy(frame0.data2, data2, sizeof(data2));
memcpy(frame1.data1, dataL, sizeof(dataL));
memcpy(frame1.data2, data2, sizeof(data2));
frame0.checksum = 0;
frame0.checksum = calc_checksum(&frame0, sizeof(frame0));
frame1.checksum = 0;
frame1.checksum = calc_checksum(&frame1, sizeof(frame1));
if (touch0_auto) {
//dprintf("Wacca touch: Touch0 auto frame #%2hx sent\n", frame0.count);
EnterCriticalSection(&touch0_lock);
iobuf_write(&touch0_uart.readable, &frame0, sizeof(frame0));
LeaveCriticalSection(&touch0_lock);
}
if (touch1_auto) {
//dprintf("Wacca touch: Touch1 auto frame #%2hx sent\n", frame0.count);
EnterCriticalSection(&touch1_lock);
iobuf_write(&touch1_uart.readable, &frame1, sizeof(frame1));
LeaveCriticalSection(&touch1_lock);
}
}
/* Decodes the response into a struct that's easier to work with. */
static HRESULT touch_frame_decode(struct touch_req *dest, struct iobuf *iobuf, int side)
{
dest->side = side;
dest->cmd = iobuf->bytes[0];
iobuf->pos--;
dest->data_length = iobuf->pos;
if (dest->data_length > 0) {
for (int i = 1; i < dest->data_length; i++) {
dest->data[i-1] = iobuf->bytes[i];
}
}
iobuf->pos -= dest->data_length;
return S_OK;
}
/* The last byte of every response is a checksum.
* This checksum is calculated by bitwise XORing
* every byte in the response, then dropping the MSB.
* Thanks the CrazyRedMachine for figuring that out!!
*/
static uint8_t calc_checksum(const void *ptr, size_t nbytes)
{
const uint8_t *src;
uint8_t checksum = 0;
src = ptr;
for (size_t i = 0; i < nbytes; i++) {
//dprintf("Wacca touch: Calculating %2hx\n", src[i]);
checksum = checksum^(src[i]);
}
//dprintf("Wacca touch: Checksum is %2hx\n", checksum&0x7f);
return checksum&0x7f;
}
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