segatools/chunihook/slider.c
2019-11-05 20:11:25 -05:00

244 lines
5.9 KiB
C

#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 "chunihook/slider.h"
#include "chuniio/chuniio.h"
#include "hook/iobuf.h"
#include "hook/iohook.h"
#include "hooklib/uart.h"
#include "util/dprintf.h"
#include "util/dump.h"
static HRESULT slider_handle_irp(struct irp *irp);
static HRESULT slider_handle_irp_locked(struct irp *irp);
static HRESULT slider_req_dispatch(const union slider_req_any *req);
static HRESULT slider_req_reset(void);
static HRESULT slider_req_get_board_info(void);
static HRESULT slider_req_auto_scan_start(void);
static HRESULT slider_req_auto_scan_stop(void);
static HRESULT slider_req_set_led(const struct slider_req_set_led *req);
static void slider_res_auto_scan(const uint8_t *state);
static CRITICAL_SECTION slider_lock;
static struct uart slider_uart;
static uint8_t slider_written_bytes[520];
static uint8_t slider_readable_bytes[520];
HRESULT slider_hook_init(const struct slider_config *cfg)
{
assert(cfg != NULL);
if (!cfg->enable) {
return S_FALSE;
}
InitializeCriticalSection(&slider_lock);
uart_init(&slider_uart, 1);
slider_uart.written.bytes = slider_written_bytes;
slider_uart.written.nbytes = sizeof(slider_written_bytes);
slider_uart.readable.bytes = slider_readable_bytes;
slider_uart.readable.nbytes = sizeof(slider_readable_bytes);
return iohook_push_handler(slider_handle_irp);
}
static HRESULT slider_handle_irp(struct irp *irp)
{
HRESULT hr;
assert(irp != NULL);
if (!uart_match_irp(&slider_uart, irp)) {
return iohook_invoke_next(irp);
}
EnterCriticalSection(&slider_lock);
hr = slider_handle_irp_locked(irp);
LeaveCriticalSection(&slider_lock);
return hr;
}
static HRESULT slider_handle_irp_locked(struct irp *irp)
{
union slider_req_any req;
struct iobuf req_iobuf;
HRESULT hr;
if (irp->op == IRP_OP_OPEN) {
dprintf("Chunithm slider: Starting backend DLL\n");
hr = chuni_io_slider_init();
if (FAILED(hr)) {
dprintf("Chunithm slider: Backend DLL error: %x\n", (int) hr);
return hr;
}
}
hr = uart_handle_irp(&slider_uart, irp);
if (FAILED(hr) || irp->op != IRP_OP_WRITE) {
return hr;
}
for (;;) {
#if 0
dprintf("TX Buffer:\n");
dump_iobuf(&slider_uart.written);
#endif
req_iobuf.bytes = req.bytes;
req_iobuf.nbytes = sizeof(req.bytes);
req_iobuf.pos = 0;
hr = slider_frame_decode(&req_iobuf, &slider_uart.written);
if (hr != S_OK) {
if (FAILED(hr)) {
dprintf("Chunithm slider: Deframe error: %x\n", (int) hr);
}
return hr;
}
#if 0
dprintf("Deframe Buffer:\n");
dump_iobuf(&req_iobuf);
#endif
hr = slider_req_dispatch(&req);
if (FAILED(hr)) {
dprintf("Chunithm slider: Processing error: %x\n", (int) hr);
}
}
}
static HRESULT slider_req_dispatch(const union slider_req_any *req)
{
switch (req->hdr.cmd) {
case SLIDER_CMD_RESET:
return slider_req_reset();
case SLIDER_CMD_GET_BOARD_INFO:
return slider_req_get_board_info();
case SLIDER_CMD_SET_LED_CHUNI:
return slider_req_set_led(&req->set_led);
case SLIDER_CMD_AUTO_SCAN_START:
return slider_req_auto_scan_start();
case SLIDER_CMD_AUTO_SCAN_STOP:
return slider_req_auto_scan_stop();
default:
dprintf("Unhandled command %02x\n", req->hdr.cmd);
return S_OK;
}
}
static HRESULT slider_req_reset(void)
{
struct slider_hdr resp;
dprintf("Chunithm slider: Reset\n");
resp.sync = 0xFF;
resp.cmd = SLIDER_CMD_RESET;
resp.nbytes = 0;
return slider_frame_encode(&slider_uart.readable, &resp, sizeof(resp));
}
static HRESULT slider_req_get_board_info(void)
{
struct slider_resp_get_board_info resp;
dprintf("Chunithm slider: Get firmware version\n");
memset(&resp, 0, sizeof(resp));
resp.hdr.sync = SLIDER_FRAME_SYNC;
resp.hdr.cmd = SLIDER_CMD_GET_BOARD_INFO;
resp.hdr.nbytes = sizeof(resp.version);
strcpy_s(
resp.version,
sizeof(resp.version),
"15330 \xA0" "06712\xFF" "\x90");
return slider_frame_encode(&slider_uart.readable, &resp, sizeof(resp));
}
static HRESULT slider_req_auto_scan_start(void)
{
dprintf("Chunithm slider: Start slider notifications\n");
chuni_io_slider_start(slider_res_auto_scan);
/* This message is not acknowledged */
return S_OK;
}
static HRESULT slider_req_auto_scan_stop(void)
{
struct slider_hdr resp;
dprintf("Chunithm slider: Stop slider notifications\n");
/* IO DLL worker thread might attempt to invoke the callback (which needs
to take slider_lock, which we are currently holding) before noticing that
it needs to shut down. Unlock here so that we don't deadlock in that
situation. */
LeaveCriticalSection(&slider_lock);
chuni_io_slider_stop();
EnterCriticalSection(&slider_lock);
resp.sync = SLIDER_FRAME_SYNC;
resp.cmd = SLIDER_CMD_AUTO_SCAN_STOP;
resp.nbytes = 0;
return slider_frame_encode(&slider_uart.readable, &resp, sizeof(resp));
}
static HRESULT slider_req_set_led(const struct slider_req_set_led *req)
{
chuni_io_slider_set_leds(req->payload.rgb);
/* This message is not acknowledged */
return S_OK;
}
static void slider_res_auto_scan(const uint8_t *state)
{
struct slider_resp_auto_scan resp;
resp.hdr.sync = SLIDER_FRAME_SYNC;
resp.hdr.cmd = SLIDER_CMD_AUTO_SCAN;
resp.hdr.nbytes = sizeof(resp.pressure);
memcpy(resp.pressure, state, sizeof(resp.pressure));
EnterCriticalSection(&slider_lock);
slider_frame_encode(&slider_uart.readable, &resp, sizeof(resp));
LeaveCriticalSection(&slider_lock);
}