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driver_loops.c
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#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <stdbool.h>
#include <stdint.h>
#include <fcntl.h>
#include <unistd.h>
#include <pthread.h>
#include <linux/uinput.h>
#include <sys/ioctl.h>
#include <hidapi/hidapi.h>
#include "probe.h"
#include "device_ids.h"
#include "driver_loops.h"
#include "logging.h"
#include "configure.h"
#include "force_feedback.h"
// ref https://github.com/berarma/new-lg4ff/blob/master/hid-lg4ff.c
#define SETUP_KEY(f, k){ \
ioctl(f, UI_SET_EVBIT, EV_KEY); \
ioctl(f, UI_SET_KEYBIT, k); \
}
#define SETUP_AXIS(f, a, min, max){ \
ioctl(f, UI_SET_EVBIT, EV_ABS); \
ioctl(f, UI_SET_ABSBIT, a); \
struct uinput_abs_setup uas = {0}; \
uas.code = a; \
uas.absinfo.minimum = min; \
uas.absinfo.maximum = max; \
ioctl(f, UI_ABS_SETUP, &uas); \
}
#define SETUP_FFB(f, k){ \
ioctl(f, UI_SET_EVBIT, EV_FF); \
ioctl(f, UI_SET_EVBIT, EV_FF_STATUS); \
ioctl(f, UI_SET_FFBIT, k); \
}
#define EMIT_INPUT(f, t, c, v){ \
struct input_event e; \
e.type = t; \
e.code = c; \
e.value = v; \
write(f, &e, sizeof(e)); \
}
static bool get_bit(const uint8_t *buf, int bit_num, int buf_len){
int byte_offset = bit_num / 8;
int local_bit = bit_num % 8;
if(byte_offset >= buf_len){
STDERR("%s: bit_num %d is too big for buf_len %d\n", __func__, bit_num, buf_len);
exit(1);
}
uint8_t mask = 1 << local_bit;
return (buf[byte_offset] & mask) ? 1 : 0;
}
static void uinput_g29_setup(int uinput_fd, struct loop_context *context){
// 25 buttons numerated from 1 to 25 on hid
// wine just goes ascending so map all 25 onto trigger happy during evdev -> hid
for(int i = 0;i < 25; i++){
int key = BTN_TRIGGER_HAPPY + i;
SETUP_KEY(uinput_fd, key);
}
// X axis on 0-65535, winebus sdl/udev seems to just enumerate them
SETUP_AXIS(uinput_fd, ABS_X, 0, 65535);
// Y on 255 - 0
SETUP_AXIS(uinput_fd, ABS_Y, 0, 255);
// Z on 255 - 0
SETUP_AXIS(uinput_fd, ABS_Z, 0, 255);
// Rx is a dummy
//SETUP_AXIS(uinput_fd, ABS_RX, 0, 255);
// Ry is a dummy
//SETUP_AXIS(uinput_fd, ABS_RY, 0, 255);
// Rz on 255 - 0
SETUP_AXIS(uinput_fd, ABS_RZ, 0, 255);
// HAT/dpad
SETUP_AXIS(uinput_fd, ABS_HAT0X, -1, 1);
SETUP_AXIS(uinput_fd, ABS_HAT0Y, -1, 1);
// ffb
SETUP_FFB(uinput_fd, FF_CONSTANT);
if(!context->hide_effects){
SETUP_FFB(uinput_fd, FF_SPRING);
SETUP_FFB(uinput_fd, FF_DAMPER);
SETUP_FFB(uinput_fd, FF_AUTOCENTER);
SETUP_FFB(uinput_fd, FF_PERIODIC);
SETUP_FFB(uinput_fd, FF_SINE);
SETUP_FFB(uinput_fd, FF_SQUARE);
SETUP_FFB(uinput_fd, FF_TRIANGLE);
SETUP_FFB(uinput_fd, FF_SAW_UP);
SETUP_FFB(uinput_fd, FF_SAW_DOWN);
SETUP_FFB(uinput_fd, FF_RAMP);
SETUP_FFB(uinput_fd, FF_FRICTION);
}
struct uinput_setup usetup = {0};
usetup.id.bustype = BUS_USB;
usetup.id.vendor = context->vendor_id == 0? USB_VENDOR_ID_LOGITECH: context->vendor_id;
usetup.id.product = context->product_id == 0? USB_DEVICE_ID_LOGITECH_G29_WHEEL: context->product_id;
usetup.ff_effects_max = LG4FF_MAX_EFFECTS;
sprintf(usetup.name, "userspace G29 %04x:%04x", usetup.id.vendor, usetup.id.product);
ioctl(uinput_fd, UI_DEV_SETUP, &usetup);
ioctl(uinput_fd, UI_DEV_CREATE);
}
static void uinput_g27_setup(int uinput_fd, struct loop_context *context){
// 22 buttons numerated from 1 to 22 on hid
for(int i = 0;i < 22; i++){
int key = BTN_TRIGGER_HAPPY + i;
SETUP_KEY(uinput_fd, key);
}
// X axis on 0-16383
SETUP_AXIS(uinput_fd, ABS_X, 0, 16383);
// Y on 255 - 0
SETUP_AXIS(uinput_fd, ABS_Y, 0, 255);
// Z on 255 - 0
SETUP_AXIS(uinput_fd, ABS_Z, 0, 255);
// Rx is a dummy
//SETUP_AXIS(uinput_fd, ABS_RX, 0, 255);
// Ry is a dummy
//SETUP_AXIS(uinput_fd, ABS_RY, 0, 255);
// Rz on 255 - 0
SETUP_AXIS(uinput_fd, ABS_RZ, 0, 255);
// HAT/dpad
SETUP_AXIS(uinput_fd, ABS_HAT0X, -1, 1);
SETUP_AXIS(uinput_fd, ABS_HAT0Y, -1, 1);
// ffb
SETUP_FFB(uinput_fd, FF_CONSTANT);
if(!context->hide_effects){
SETUP_FFB(uinput_fd, FF_SPRING);
SETUP_FFB(uinput_fd, FF_DAMPER);
SETUP_FFB(uinput_fd, FF_AUTOCENTER);
SETUP_FFB(uinput_fd, FF_PERIODIC);
SETUP_FFB(uinput_fd, FF_SINE);
SETUP_FFB(uinput_fd, FF_SQUARE);
SETUP_FFB(uinput_fd, FF_TRIANGLE);
SETUP_FFB(uinput_fd, FF_SAW_UP);
SETUP_FFB(uinput_fd, FF_SAW_DOWN);
SETUP_FFB(uinput_fd, FF_RAMP);
SETUP_FFB(uinput_fd, FF_FRICTION);
}
struct uinput_setup usetup = {0};
usetup.id.bustype = BUS_USB;
usetup.id.vendor = context->vendor_id == 0? USB_VENDOR_ID_LOGITECH: context->vendor_id;
usetup.id.product = context->product_id == 0? USB_DEVICE_ID_LOGITECH_G27_WHEEL: context->product_id;
usetup.ff_effects_max = LG4FF_MAX_EFFECTS;
sprintf(usetup.name, "userspace G27 %04x:%04x", usetup.id.vendor, usetup.id.product);
ioctl(uinput_fd, UI_DEV_SETUP, &usetup);
ioctl(uinput_fd, UI_DEV_CREATE);
}
static void uinput_g25_setup(int uinput_fd, struct loop_context *context){
// 19 buttons numerated from 1 to 19 on hid
for(int i = 0;i < 19; i++){
int key = BTN_TRIGGER_HAPPY + i;
SETUP_KEY(uinput_fd, key);
}
// X axis on 0-16383
SETUP_AXIS(uinput_fd, ABS_X, 0, 16383);
// Y on 255 - 0
SETUP_AXIS(uinput_fd, ABS_Y, 0, 255);
// Z on 255 - 0
SETUP_AXIS(uinput_fd, ABS_Z, 0, 255);
// Rx is a dummy
//SETUP_AXIS(uinput_fd, ABS_RX, 0, 255)
// Ry is a dummy
//SETUP_AXIS(uinput_fd, ABS_RY, 0, 255)
// Rz on 255 - 0
SETUP_AXIS(uinput_fd, ABS_RZ, 0, 255);
// HAT/dpad
SETUP_AXIS(uinput_fd, ABS_HAT0X, -1, 1);
SETUP_AXIS(uinput_fd, ABS_HAT0Y, -1, 1);
// ffb
SETUP_FFB(uinput_fd, FF_CONSTANT);
if(!context->hide_effects){
SETUP_FFB(uinput_fd, FF_SPRING);
SETUP_FFB(uinput_fd, FF_DAMPER);
SETUP_FFB(uinput_fd, FF_AUTOCENTER);
SETUP_FFB(uinput_fd, FF_PERIODIC);
SETUP_FFB(uinput_fd, FF_SINE);
SETUP_FFB(uinput_fd, FF_SQUARE);
SETUP_FFB(uinput_fd, FF_TRIANGLE);
SETUP_FFB(uinput_fd, FF_SAW_UP);
SETUP_FFB(uinput_fd, FF_SAW_DOWN);
SETUP_FFB(uinput_fd, FF_RAMP);
SETUP_FFB(uinput_fd, FF_FRICTION);
}
struct uinput_setup usetup = {0};
usetup.id.bustype = BUS_USB;
usetup.id.vendor = context->vendor_id == 0? USB_VENDOR_ID_LOGITECH: context->vendor_id;
usetup.id.product = context->product_id == 0? USB_DEVICE_ID_LOGITECH_G25_WHEEL: context->product_id;
usetup.ff_effects_max = LG4FF_MAX_EFFECTS;
sprintf(usetup.name, "userspace G25 %04x:%04x", usetup.id.vendor, usetup.id.product);
ioctl(uinput_fd, UI_DEV_SETUP, &usetup);
ioctl(uinput_fd, UI_DEV_CREATE);
}
static void uinput_dfgt_setup(int uinput_fd, struct loop_context *context){
// 19 buttons numerated from 1 to 21 on hid
for(int i = 0;i < 21; i++){
int key = BTN_TRIGGER_HAPPY + i;
SETUP_KEY(uinput_fd, key);
}
// X axis on 0-16383
SETUP_AXIS(uinput_fd, ABS_X, 0, 16383);
// Y on 255 - 0
SETUP_AXIS(uinput_fd, ABS_Y, 0, 255);
// Z on 255 0
SETUP_AXIS(uinput_fd, ABS_Z, 0, 255);
// Rx is a dummy
//SETUP_AXIS(uinput_fd, ABS_RX, 0, 255)
// Ry is a dummy
//SETUP_AXIS(uinput_fd, ABS_RY, 0, 255)
// Rz is a dummy
//SETUP_AXIS(uinput_fd, ABS_RZ, 0, 255);
// HAT/dpad
SETUP_AXIS(uinput_fd, ABS_HAT0X, -1, 1);
SETUP_AXIS(uinput_fd, ABS_HAT0Y, -1, 1);
// ffb
SETUP_FFB(uinput_fd, FF_CONSTANT);
if(!context->hide_effects){
SETUP_FFB(uinput_fd, FF_SPRING);
SETUP_FFB(uinput_fd, FF_DAMPER);
SETUP_FFB(uinput_fd, FF_AUTOCENTER);
SETUP_FFB(uinput_fd, FF_PERIODIC);
SETUP_FFB(uinput_fd, FF_SINE);
SETUP_FFB(uinput_fd, FF_SQUARE);
SETUP_FFB(uinput_fd, FF_TRIANGLE);
SETUP_FFB(uinput_fd, FF_SAW_UP);
SETUP_FFB(uinput_fd, FF_SAW_DOWN);
SETUP_FFB(uinput_fd, FF_RAMP);
SETUP_FFB(uinput_fd, FF_FRICTION);
}
struct uinput_setup usetup = {0};
usetup.id.bustype = BUS_USB;
usetup.id.vendor = context->vendor_id == 0? USB_VENDOR_ID_LOGITECH: context->vendor_id;
usetup.id.product = context->product_id == 0? USB_DEVICE_ID_LOGITECH_DFGT_WHEEL: context->product_id;
usetup.ff_effects_max = LG4FF_MAX_EFFECTS;
sprintf(usetup.name, "userspace Driving Force GT %04x:%04x", usetup.id.vendor, usetup.id.product);
ioctl(uinput_fd, UI_DEV_SETUP, &usetup);
ioctl(uinput_fd, UI_DEV_CREATE);
}
static void uinput_dfp_setup(int uinput_fd, struct loop_context *context){
// 14 buttons numerated from 1 to 14 on hid
for(int i = 0;i < 14; i++){
int key = BTN_TRIGGER_HAPPY + i;
SETUP_KEY(uinput_fd, key);
}
// X axis on 0-16383
SETUP_AXIS(uinput_fd, ABS_X, 0, 16383);;
// Y on 255 - 0
SETUP_AXIS(uinput_fd, ABS_Y, 0, 255);
// Z is a dummy
//SETUP_AXIS(uinput_fd, ABS_Z, 0, 255);
// Rx is a dummy
//SETUP_AXIS(uinput_fd, ABS_RX, 0, 255);
// Ry is a dummy
//SETUP_AXIS(uinput_fd, ABS_RY, 0, 255);
// Rz on 255 - 0
SETUP_AXIS(uinput_fd, ABS_RZ, 0, 255);
// HAT/dpad
SETUP_AXIS(uinput_fd, ABS_HAT0X, -1, 1);
SETUP_AXIS(uinput_fd, ABS_HAT0Y, -1, 1);
// ffb
SETUP_FFB(uinput_fd, FF_CONSTANT);
if(!context->hide_effects){
SETUP_FFB(uinput_fd, FF_SPRING);
SETUP_FFB(uinput_fd, FF_DAMPER);
SETUP_FFB(uinput_fd, FF_AUTOCENTER);
SETUP_FFB(uinput_fd, FF_PERIODIC);
SETUP_FFB(uinput_fd, FF_SINE);
SETUP_FFB(uinput_fd, FF_SQUARE);
SETUP_FFB(uinput_fd, FF_TRIANGLE);
SETUP_FFB(uinput_fd, FF_SAW_UP);
SETUP_FFB(uinput_fd, FF_SAW_DOWN);
SETUP_FFB(uinput_fd, FF_RAMP);
SETUP_FFB(uinput_fd, FF_FRICTION);
}
struct uinput_setup usetup = {0};
usetup.id.bustype = BUS_USB;
usetup.id.vendor = context->vendor_id == 0? USB_VENDOR_ID_LOGITECH: context->vendor_id;
usetup.id.product = context->product_id == 0? USB_DEVICE_ID_LOGITECH_DFP_WHEEL: context->product_id;
usetup.ff_effects_max = LG4FF_MAX_EFFECTS;
sprintf(usetup.name, "userspace Driving Force Pro %04x:%04x", usetup.id.vendor, usetup.id.product);
ioctl(uinput_fd, UI_DEV_SETUP, &usetup);
ioctl(uinput_fd, UI_DEV_CREATE);
}
static void uinput_dfex_setup(int uinput_fd, struct loop_context *context){
// 14 buttons numerated from 1 to 13 on hid
for(int i = 0;i < 13; i++){
int key = BTN_TRIGGER_HAPPY + i;
SETUP_KEY(uinput_fd, key);
}
// X axis 0 - 255
SETUP_AXIS(uinput_fd, ABS_X, 0, 255);;
// Y on 255 - 0
SETUP_AXIS(uinput_fd, ABS_Y, 0, 255);
// Z on 255 - 0
SETUP_AXIS(uinput_fd, ABS_Z, 0, 255);
// Rx is a dummy
//SETUP_AXIS(uinput_fd, ABS_RX, 0, 255);
// Ry is a dummy
//SETUP_AXIS(uinput_fd, ABS_RY, 0, 255);
// Rz on 255 - 0
SETUP_AXIS(uinput_fd, ABS_RZ, 0, 255);
// HAT/dpad
SETUP_AXIS(uinput_fd, ABS_HAT0X, -1, 1);
SETUP_AXIS(uinput_fd, ABS_HAT0Y, -1, 1);
// ffb
SETUP_FFB(uinput_fd, FF_CONSTANT);
if(!context->hide_effects){
SETUP_FFB(uinput_fd, FF_SPRING);
SETUP_FFB(uinput_fd, FF_DAMPER);
SETUP_FFB(uinput_fd, FF_AUTOCENTER);
SETUP_FFB(uinput_fd, FF_PERIODIC);
SETUP_FFB(uinput_fd, FF_SINE);
SETUP_FFB(uinput_fd, FF_SQUARE);
SETUP_FFB(uinput_fd, FF_TRIANGLE);
SETUP_FFB(uinput_fd, FF_SAW_UP);
SETUP_FFB(uinput_fd, FF_SAW_DOWN);
SETUP_FFB(uinput_fd, FF_RAMP);
SETUP_FFB(uinput_fd, FF_FRICTION);
}
struct uinput_setup usetup = {0};
usetup.id.bustype = BUS_USB;
usetup.id.vendor = context->vendor_id == 0? USB_VENDOR_ID_LOGITECH: context->vendor_id;
usetup.id.product = context->product_id == 0? USB_DEVICE_ID_LOGITECH_WHEEL: context->product_id;
usetup.ff_effects_max = LG4FF_MAX_EFFECTS;
sprintf(usetup.name, "userspace Driving Force EX %04x:%04x", usetup.id.vendor, usetup.id.product);
ioctl(uinput_fd, UI_DEV_SETUP, &usetup);
ioctl(uinput_fd, UI_DEV_CREATE);
}
static void uinput_g29_emit(int uinput_fd, uint8_t *report_buf, uint8_t *last_report_buf, struct loop_context *context){
// 12 bytes report
// first 4 bits are for the hat
// 25 bits are the buttons
// 3 bits of padding
// 16 bits of X
// 8 bits of Z
// 8 bits of Rz
// 8 bits of Y
// 8 bits of vendor
// 8 bits of vendor
// 8 bits of vendor
uint8_t hat = report_buf[0] & 0x0f;
uint8_t last_hat = last_report_buf[0] & 0x0f;
if(hat != last_hat){
switch(hat){
case 0:
// up only
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, -1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 0);
break;
case 1:
// up and right
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, -1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 1);
break;
case 2:
// right only
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 0);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 1);
break;
case 3:
// down right
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 1);
break;
case 4:
// down
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 0);
break;
case 5:
// down left
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, -1);
break;
case 6:
// left
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 0);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, -1);
break;
case 7:
// up left
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, -1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, -1);
break;
case 8:
// center
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 0);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 0);
break;
}
}
for(int i = 0;i < 25; i++){
int key = BTN_TRIGGER_HAPPY + i;
int bit_num = i + 4;
bool button_on = get_bit(report_buf, bit_num, 12);
bool button_was_on = get_bit(last_report_buf, bit_num, 12);
if(button_on != button_was_on){
EMIT_INPUT(uinput_fd, EV_KEY, key, button_on? 1: 0);
}
}
if(context->combine_pedals == 1){
report_buf[6] = ((uint32_t)0xFF + report_buf[6] - report_buf[7]) >> 1;
report_buf[7] = 0x7F;
}
if(context->combine_pedals == 2){
report_buf[6] = ((uint32_t)0xFF + report_buf[6] - report_buf[8]) >> 1;
report_buf[8] = 0x7F;
}
uint16_t x = *(uint16_t *)&report_buf[4];
uint16_t last_x = *(uint16_t *)&last_report_buf[4];
if(x != last_x){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_X, x);
}
if(report_buf[6] != last_report_buf[6]){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_Z, report_buf[6]);
}
if(report_buf[7] != last_report_buf[7]){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_RZ, report_buf[7]);
}
if(report_buf[8] != last_report_buf[8]){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_Y, report_buf[8]);
}
EMIT_INPUT(uinput_fd, EV_SYN, SYN_REPORT, 0);
memcpy(last_report_buf, report_buf, 12);
}
static void uinput_g27_emit(int uinput_fd, uint8_t *report_buf, uint8_t *last_report_buf, struct loop_context *context){
// 11 bytes report
// first 4 bits are for the hat
// second 22 bits are the buttons (on g25, 19 bits of buttons, 3 bits of vendor)
// 14 bits of X
// 8 bits of Z
// 8 bits of Rz
// 8 bits of Y
// ... vendor
uint8_t hat = report_buf[0] & 0x0f;
uint8_t last_hat = last_report_buf[0] & 0x0f;
if(hat != last_hat){
switch(hat){
case 0:
// up only
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, -1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 0);
break;
case 1:
// up and right
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, -1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 1);
break;
case 2:
// right only
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 0);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 1);
break;
case 3:
// down right
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 1);
break;
case 4:
// down
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 0);
break;
case 5:
// down left
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, -1);
break;
case 6:
// left
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 0);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, -1);
break;
case 7:
// up left
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, -1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, -1);
break;
case 8:
// center
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 0);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 0);
break;
}
}
for(int i = 0;i < 22; i++){
int key = BTN_TRIGGER_HAPPY + i;
int bit_num = i + 4;
bool button_on = get_bit(report_buf, bit_num, 12);
bool button_was_on = get_bit(last_report_buf, bit_num, 12);
if(button_on != button_was_on){
EMIT_INPUT(uinput_fd, EV_KEY, key, button_on? 1: 0);
}
}
if(context->combine_pedals == 1){
report_buf[5] = ((uint32_t)0xFF + report_buf[5] - report_buf[6]) >> 1;
report_buf[6] = 0x7F;
}
if(context->combine_pedals == 2){
report_buf[5] = ((uint32_t)0xFF + report_buf[5] - report_buf[7]) >> 1;
report_buf[7] = 0x7F;
}
// why don't they align this, what even is a 14bit uint :(
uint16_t x = 0;
x = x | report_buf[4] << 6;
x = x | report_buf[3] >> 2;
uint16_t last_x = 0;
last_x = last_x | last_report_buf[4] << 6;
last_x = last_x | last_report_buf[3] >> 2;
if(x != last_x){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_X, x);
}
if(report_buf[5] != last_report_buf[5]){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_Z, report_buf[5]);
}
if(report_buf[6] != last_report_buf[6]){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_RZ, report_buf[6]);
}
if(report_buf[7] != last_report_buf[7]){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_Y, report_buf[7]);
}
EMIT_INPUT(uinput_fd, EV_SYN, SYN_REPORT, 0);
memcpy(last_report_buf, report_buf, 11);
}
static void uinput_dfgt_emit(int uinput_fd, uint8_t *report_buf, uint8_t *last_report_buf, struct loop_context *context){
// 8 bytes report
// first 4 bits are for the hat
// 21 bits are the buttons
// 7 bits of vendor
// 14 bits of X
// 2 bits of vendor (why)
// 8 bits of Z
// 8 bits of Rz
// 8 bits of Y
// ... vendor
uint8_t hat = report_buf[0] & 0x0f;
uint8_t last_hat = last_report_buf[0] & 0x0f;
if(hat != last_hat){
switch(hat){
case 0:
// up only
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, -1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 0);
break;
case 1:
// up and right
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, -1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 1);
break;
case 2:
// right only
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 0);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 1);
break;
case 3:
// down right
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 1);
break;
case 4:
// down
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 0);
break;
case 5:
// down left
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, -1);
break;
case 6:
// left
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 0);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, -1);
break;
case 7:
// up left
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, -1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, -1);
break;
case 8:
// center
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 0);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 0);
break;
}
}
for(int i = 0;i < 21; i++){
int key = BTN_TRIGGER_HAPPY + i;
int bit_num = i + 4;
bool button_on = get_bit(report_buf, bit_num, 8);
bool button_was_on = get_bit(last_report_buf, bit_num, 8);
if(button_on != button_was_on){
EMIT_INPUT(uinput_fd, EV_KEY, key, button_on? 1: 0);
}
}
if(context->combine_pedals == 1){
report_buf[6] = ((uint32_t)0xFF + report_buf[6] - report_buf[7]) >> 1;
report_buf[7] = 0x7F;
}
// why don't they align this, what even is a 14bit uint :(
uint16_t x = 0;
x = x | report_buf[4];
x = x | (report_buf[5] & 0x3F) << 8;
uint16_t last_x = 0;
last_x = last_x | last_report_buf[4];
last_x = last_x | (last_report_buf[5] & 0x3F) << 8;
if(x != last_x){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_X, x);
}
if(report_buf[6] != last_report_buf[6]){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_Y, report_buf[6]);
}
if(report_buf[7] != last_report_buf[7]){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_Z, report_buf[7]);
}
EMIT_INPUT(uinput_fd, EV_SYN, SYN_REPORT, 0);
memcpy(last_report_buf, report_buf, 8);
}
static void uinput_dfp_emit(int uinput_fd, uint8_t *report_buf, uint8_t *last_report_buf, struct loop_context *context){
// 8 bytes report
// first 14 bits of X
// 14 bits of buttons
// 4 bits of hat
// 8 bits of Y
// 8 bits or Rz
uint16_t x = 0;
x = x | report_buf[0];
x = x | (report_buf[1] & 0x3F) << 8;
uint16_t last_x = 0;
last_x = last_x | last_report_buf[0];
last_x = last_x | (last_report_buf[1] & 0x3F) << 8;
if(x != last_x){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_X, x);
}
for(int i = 0;i < 14; i++){
int key = BTN_TRIGGER_HAPPY + i;
int bit_num = i + 14;
bool button_on = get_bit(report_buf, bit_num, 8);
bool button_was_on = get_bit(last_report_buf, bit_num, 8);
if(button_on != button_was_on){
EMIT_INPUT(uinput_fd, EV_KEY, key, button_on? 1: 0);
}
}
uint8_t hat = report_buf[3] >> 4;
uint8_t last_hat = last_report_buf[3] >> 4;
if(hat != last_hat){
switch(hat){
case 0:
// up only
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, -1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 0);
break;
case 1:
// up and right
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, -1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 1);
break;
case 2:
// right only
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 0);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 1);
break;
case 3:
// down right
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 1);
break;
case 4:
// down
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 0);
break;
case 5:
// down left
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, -1);
break;
case 6:
// left
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 0);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, -1);
break;
case 7:
// up left
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, -1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, -1);
break;
case 8:
// center
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 0);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 0);
break;
}
}
if(context->combine_pedals == 1){
report_buf[5] = ((uint32_t)0xFF + report_buf[5] - report_buf[6]) >> 1;
report_buf[6] = 0x7F;
}
if(report_buf[5] != last_report_buf[5]){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_Y, report_buf[5]);
}
if(report_buf[6] != last_report_buf[6]){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_RZ, report_buf[6]);
}
EMIT_INPUT(uinput_fd, EV_SYN, SYN_REPORT, 0);
memcpy(last_report_buf, report_buf, 8);
}
static void uinput_dfex_emit(int uinput_fd, uint8_t *report_buf, uint8_t *last_report_buf, struct loop_context *context){
// 27 bytes report
// first 13 bits of buttons
// 3 bits of padding
// 4 bits of hat
for(int i = 0;i < 13; i++){
int key = BTN_TRIGGER_HAPPY + i;
int bit_num = i;
bool button_on = get_bit(report_buf, bit_num, 27);
bool button_was_on = get_bit(last_report_buf, bit_num, 27);
if(button_on != button_was_on){
EMIT_INPUT(uinput_fd, EV_KEY, key, button_on? 1: 0);
}
}
uint8_t hat = report_buf[2] & 0x0F;
uint8_t last_hat = last_report_buf[3] >> 4;
if(hat != last_hat){
switch(hat){
case 0:
// up only
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, -1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 0);
break;
case 1:
// up and right
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, -1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 1);
break;
case 2:
// right only
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 0);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 1);
break;
case 3:
// down right
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 1);
break;
case 4:
// down
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 0);
break;
case 5:
// down left
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, -1);
break;
case 6:
// left
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 0);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, -1);
break;
case 7:
// up left
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, -1);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, -1);
break;
case 8:
// center
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0Y, 0);
EMIT_INPUT(uinput_fd, EV_ABS, ABS_HAT0X, 0);
break;
}
}
if(context->combine_pedals == 1){
report_buf[5] = ((uint32_t)0xFF + report_buf[5] - report_buf[6]) >> 1;
report_buf[6] = 0x7F;
}
if(report_buf[3] != last_report_buf[3]){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_X, report_buf[3]);
}
if(report_buf[4] != last_report_buf[4]){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_Y, report_buf[4]);
}
if(report_buf[5] != last_report_buf[5]){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_Z, report_buf[5]);
}
if(report_buf[6] != last_report_buf[6]){
EMIT_INPUT(uinput_fd, EV_ABS, ABS_RZ, report_buf[6]);
}
EMIT_INPUT(uinput_fd, EV_SYN, SYN_REPORT, 0);
memcpy(last_report_buf, report_buf, 27);
}
struct input_loop_context{
struct loop_context context;
hid_device *read_hid_device;
int uinput_fd;
pthread_mutex_t *uinput_write_mutex;
};
static void *input_loop(void *arg){
struct input_loop_context *loop_context = (struct input_loop_context *)arg;
uint8_t report_buf[32] = {0};
uint8_t last_report_buf[32] = {0};
while(true){
switch(loop_context->context.device.product_id){
case USB_DEVICE_ID_LOGITECH_G29_WHEEL:{
int bytes_read = hid_read(loop_context->read_hid_device, report_buf, 12);
if(bytes_read == -1){
char error_buf[128];
wcstombs(error_buf, hid_error(loop_context->read_hid_device), sizeof(error_buf));
STDERR("failed reading input report from G29, %s\n", error_buf);
exit(1);
}
pthread_mutex_lock(loop_context->uinput_write_mutex);
uinput_g29_emit(loop_context->uinput_fd, report_buf, last_report_buf, &loop_context->context);
pthread_mutex_unlock(loop_context->uinput_write_mutex);
break;
}
case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
case USB_DEVICE_ID_LOGITECH_G25_WHEEL:{
int bytes_read = hid_read(loop_context->read_hid_device, report_buf, 11);
if(bytes_read == -1){
char error_buf[128];
wcstombs(error_buf, hid_error(loop_context->read_hid_device), sizeof(error_buf));
STDERR("failed reading input report from G25/G27, %s\n", error_buf);
exit(1);
}
pthread_mutex_lock(loop_context->uinput_write_mutex);
uinput_g27_emit(loop_context->uinput_fd, report_buf, last_report_buf, &loop_context->context);
pthread_mutex_unlock(loop_context->uinput_write_mutex);
break;
}
case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:{
int bytes_read = hid_read(loop_context->read_hid_device, report_buf, 8);
if(bytes_read == -1){
char error_buf[128];
wcstombs(error_buf, hid_error(loop_context->read_hid_device), sizeof(error_buf));
STDERR("failed reading input report from Drive Force GT, %s\n", error_buf);
exit(1);
}
pthread_mutex_lock(loop_context->uinput_write_mutex);
uinput_dfgt_emit(loop_context->uinput_fd, report_buf, last_report_buf, &loop_context->context);
pthread_mutex_unlock(loop_context->uinput_write_mutex);
break;
}
case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:{
int bytes_read = hid_read(loop_context->read_hid_device, report_buf, 8);
if(bytes_read == -1){
char error_buf[128];
wcstombs(error_buf, hid_error(loop_context->read_hid_device), sizeof(error_buf));
STDERR("failed reading input report from Drive Force Pro, %s\n", error_buf);
exit(1);
}
pthread_mutex_lock(loop_context->uinput_write_mutex);
uinput_dfp_emit(loop_context->uinput_fd, report_buf, last_report_buf, &loop_context->context);
pthread_mutex_unlock(loop_context->uinput_write_mutex);
break;
}
case USB_DEVICE_ID_LOGITECH_WHEEL:{
int bytes_read = hid_read(loop_context->read_hid_device, report_buf, 27);
if(bytes_read == -1){
char error_buf[128];
wcstombs(error_buf, hid_error(loop_context->read_hid_device), sizeof(error_buf));
STDERR("failed reading input report from Drive Force EX, %s\n", error_buf);
exit(1);
}
pthread_mutex_lock(loop_context->uinput_write_mutex);
uinput_dfex_emit(loop_context->uinput_fd, report_buf, last_report_buf, &loop_context->context);
pthread_mutex_unlock(loop_context->uinput_write_mutex);
break;
}
default:
STDERR("uinput device for %s(0x%04x) is not implemented\n", get_name_by_product_id(loop_context->context.device.product_id), loop_context->context.device.product_id);
exit(1);
}
}
}
struct output_loop_context{
struct loop_context context;
int uinput_fd;
pthread_mutex_t *uinput_write_mutex;
hid_device *write_hid_device;
pthread_mutex_t device_mutex;
struct lg4ff_device ffb_device;
};
#define CLAMP_VALUE(v, min, max){ \
if(v > max){ \
v = max; \
} \
if(v < min){ \
v = min; \
} \
}
static void *effect_loop(void *arg){
struct output_loop_context *loop_context = (struct output_loop_context *)arg;
bool effect_was_playing[LG4FF_MAX_EFFECTS] = {0};
bool effect_playing[LG4FF_MAX_EFFECTS] = {0};
while(true){
pthread_mutex_lock(&loop_context->device_mutex);
lg4ff_timer(&loop_context->ffb_device);
for(int i = 0;i < LG4FF_MAX_EFFECTS; i++){
effect_playing[i] = (loop_context->ffb_device.states[i].flags & (1 << FF_EFFECT_PLAYING))? true: false;
}
pthread_mutex_unlock(&loop_context->device_mutex);
for(int i = 0; i < LG4FF_MAX_EFFECTS; i++){
if(effect_playing[i] != effect_was_playing[i]){
effect_was_playing[i] = effect_playing[i];
EMIT_INPUT(loop_context->uinput_fd, EV_FF_STATUS, i, effect_playing[i]? FF_STATUS_PLAYING :FF_STATUS_STOPPED);
EMIT_INPUT(loop_context->uinput_fd, EV_SYN, SYN_REPORT, 0);
pthread_mutex_unlock(loop_context->uinput_write_mutex);
}
}
struct timespec duration = {0};
duration.tv_nsec = 2 * 1000000;
nanosleep(&duration, NULL);
}
}
static void *uinput_poll_loop(void *arg){
struct output_loop_context *loop_context = (struct output_loop_context *)arg;
int ret;
while(true){
struct input_event e;
int ret = read(loop_context->uinput_fd, &e, sizeof(struct input_event));
if(ret != sizeof(struct input_event)){
STDERR("failed reading ffb event from uinput, %s\n", strerror(errno));
exit(1);
}
switch(e.type){
case EV_FF:{
switch(e.code){