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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"
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 HRESULT touch_frame_encode(struct iobuf *dest, const void *ptr, size_t nbytes);
static uint8_t calc_checksum(const void *ptr, size_t nbytes);
static HRESULT touch_handle_get_rev_date(const struct touch_req *req);
static HRESULT touch_handle_startup(const struct touch_req *req);
static HRESULT touch_handle_get_rev_date_detail(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);
uint8_t input_frame_count = 0x7b;
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);
// not sure why this always returns false...
/*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_REV_DATE:
return touch_handle_get_rev_date(req);
case CMD_STARTUP:
return touch_handle_startup(req);
case CMD_GET_REV_DATE_DETAIL:
return touch_handle_get_rev_date_detail(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_rev_date(const struct touch_req *req)
{
struct touch_resp_get_rev_date resp;
HRESULT hr;
uint8_t rev[6] = { 0x31, 0x39, 0x30, 0x35, 0x32, 0x33 };
dprintf("Wacca Touch%d: Get board rev date\n", req->side);
resp.cmd = 0xa0;
memcpy(resp.data, rev, sizeof(rev));
//resp.data = rev;
if (req->side == 0) {
hr = touch_frame_encode(&touch0_uart.readable, &resp, sizeof(resp));
}
else {
hr = touch_frame_encode(&touch1_uart.readable, &resp, sizeof(resp));
}
return hr;
}
/* TODO: Very ugly please make better before upstreaming */
static HRESULT touch_handle_startup(const struct touch_req *req)
{
struct touch_resp_startup resp;
HRESULT hr;
uint8_t *rev;
dprintf("Wacca Touch%d: Startup\n", req->side);
switch (req->data[2]) {
case 0x30:
rev = (uint8_t[80]) { 0x20, 0x20, 0x20, 0x20, 0x30, 0x20, 0x20, 0x20, 0x20, 0x30, 0x20,
0x20, 0x20, 0x20, 0x31, 0x20, 0x20, 0x20, 0x20, 0x32, 0x20, 0x20, 0x20, 0x20,
0x33, 0x20, 0x20, 0x20, 0x20, 0x34, 0x20, 0x20, 0x20, 0x20, 0x35, 0x20, 0x20,
0x20, 0x31, 0x35, 0x20, 0x20, 0x20, 0x31, 0x35, 0x20, 0x20, 0x20, 0x31, 0x35,
0x20, 0x20, 0x20, 0x31, 0x35, 0x20, 0x20, 0x20, 0x31, 0x35, 0x20, 0x20, 0x20,
0x31, 0x35, 0x20, 0x20, 0x20, 0x31, 0x31, 0x20, 0x20, 0x20, 0x31, 0x31, 0x20,
0x20, 0x20, 0x31, 0x31 };
break;
case 0x31:
rev = (uint8_t[80]) { 0x20, 0x20, 0x20, 0x31, 0x31, 0x20, 0x20, 0x20, 0x31, 0x31, 0x20,
0x20, 0x20, 0x31, 0x31, 0x20, 0x20, 0x31, 0x32, 0x38, 0x20, 0x20, 0x31, 0x30,
0x33, 0x20, 0x20, 0x31, 0x30, 0x33, 0x20, 0x20, 0x31, 0x31, 0x35, 0x20, 0x20,
0x31, 0x33, 0x38, 0x20, 0x20, 0x31, 0x32, 0x37, 0x20, 0x20, 0x31, 0x30, 0x33,
0x20, 0x20, 0x31, 0x30, 0x35, 0x20, 0x20, 0x31, 0x31, 0x31, 0x20, 0x20, 0x31,
0x32, 0x36, 0x20, 0x20, 0x31, 0x31, 0x33, 0x20, 0x20, 0x20, 0x39, 0x35, 0x20,
0x20, 0x31, 0x30, 0x30 };
break;
case 0x33:
rev = (uint8_t[80]) { 0x20, 0x20, 0x31, 0x30, 0x31, 0x20, 0x20, 0x31, 0x31, 0x35, 0x20,
0x20, 0x20, 0x39, 0x38, 0x20, 0x20, 0x20, 0x38, 0x36, 0x20, 0x20, 0x20, 0x37,
0x36, 0x20, 0x20, 0x20, 0x36, 0x37, 0x20, 0x20, 0x20, 0x36, 0x38, 0x20, 0x20,
0x20, 0x34, 0x38, 0x20, 0x20, 0x31, 0x31, 0x37, 0x20, 0x20, 0x20, 0x20, 0x30,
0x20, 0x20, 0x20, 0x38, 0x32, 0x20, 0x20, 0x31, 0x35, 0x34, 0x20, 0x20, 0x20,
0x20, 0x30, 0x20, 0x20, 0x20, 0x20, 0x36, 0x20, 0x20, 0x20, 0x33, 0x35, 0x20,
0x20, 0x20, 0x20, 0x34 };
break;
default:
dprintf("Wacca touch: BAD STARTUP REQUEST %2hx\n", req->data[2]);
return 1;
}
memcpy(resp.data, rev, 80 * sizeof(uint8_t));
if (req->side == 0) {
hr = touch_frame_encode(&touch0_uart.readable, &resp, sizeof(resp));
}
else {
hr = touch_frame_encode(&touch1_uart.readable, &resp, sizeof(resp));
}
return hr;
}
static HRESULT touch_handle_get_rev_date_detail(const struct touch_req *req)
{
struct touch_resp_get_rev_date_detail resp;
HRESULT hr;
uint8_t rev[43] = { 0x31, 0x39, 0x30, 0x35, 0x32, 0x33, 0x52, 0x31,
0x39, 0x30, 0x35, 0x31, 0x34, 0x31, 0x39, 0x30, 0x35, 0x31, 0x34, 0x31,
0x39, 0x30, 0x35, 0x31, 0x34, 0x31, 0x39, 0x30, 0x35, 0x31, 0x34, 0x31,
0x39, 0x30, 0x35, 0x31, 0x34, 0x31, 0x39, 0x30, 0x35, 0x31, 0x34 };
dprintf("Wacca Touch%d: get rev date detail\n", req->side);
resp.cmd = 0xa8;
memcpy(resp.data, rev, sizeof(rev));
if (req->side == 0) {
hr = touch_frame_encode(&touch0_uart.readable, &resp, sizeof(resp));
}
else {
hr = touch_frame_encode(&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;
dprintf("Wacca Touch%d: mystery command 1\n", req->side);
resp.cmd = 0xa2;
resp.data = 0x3f;
if (req->side == 0) {
hr = touch_frame_encode(&touch0_uart.readable, &resp, sizeof(resp));
}
else {
hr = touch_frame_encode(&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;
dprintf("Wacca Touch%d: mystery command 2\n", req->side);
resp.cmd = 0x94;
resp.data = 0;
if (req->side == 0) {
hr = touch_frame_encode(&touch0_uart.readable, &resp, sizeof(resp));
}
else {
hr = touch_frame_encode(&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 };
uint8_t data2[9] = { 0x0d, 0x03, 0x02, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00 };
dprintf("Wacca Touch%d: Start Auto\n", req->side);
resp.cmd = 0x9c;
resp.data = 0;
resp.checksum = 0x49;
resp.frame.cmd= 0x81;
resp.frame.count = input_frame_count++;
memcpy(resp.frame.data1, data1, sizeof(data1));
memcpy(resp.frame.data2, data2, sizeof(data2));
resp.frame.checksum = calc_checksum(&resp.frame, sizeof(resp.frame));
if (req->side == 0) {
hr = touch_frame_encode(&touch0_uart.readable, &resp, sizeof(resp));
}
else {
hr = touch_frame_encode(&touch1_uart.readable, &resp, sizeof(resp));
}
return hr;
}
/* 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;
}
/* Encode and send the response.
* 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 HRESULT touch_frame_encode(struct iobuf *dest, const void *ptr, size_t nbytes)
{
const uint8_t *src;
uint8_t checksum = 0;
src = ptr;
for (size_t i = 0; i < nbytes; i++) {
dest->bytes[dest->pos++] = src[i];
checksum = checksum^(src[i]);
}
dest->bytes[dest->pos++] = checksum&0x7f;
return S_OK;
}
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++) {
checksum = checksum^(src[i]);
}
return checksum&0x7f;
}
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