mirror of
https://github.com/raphnet/gc_n64_usb-v3
synced 2024-12-22 07:18:52 -05:00
419 lines
9.5 KiB
C
419 lines
9.5 KiB
C
#include <stdint.h>
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#include <stdio.h>
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#include "usb.h"
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#include "gamepads.h"
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#include "usbpad.h"
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#include "mappings.h"
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#include "eeprom.h"
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#include "config.h"
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#define REPORT_ID 1
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#define REPORT_SIZE 15
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// Output Report IDs for various functions
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#define REPORT_SET_EFFECT 0x01
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#define REPORT_SET_STATUS 0x02
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#define REPORT_SET_PERIODIC 0x04
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#define REPORT_SET_CONSTANT_FORCE 0x05
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#define REPORT_EFFECT_OPERATION 0x0A
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#define REPORT_EFFECT_BLOCK_IDX 0x0B
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#define REPORT_DISABLE_ACTUATORS 0x0C
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#define REPORT_PID_POOL 0x0D
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// Feature reports
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#define REPORT_CREATE_EFFECT 0x09
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// For the 'Usage Effect Operation' report
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#define EFFECT_OP_START 1
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#define EFFECT_OP_START_SOLO 2
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#define EFFECT_OP_STOP 3
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// Feature report
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#define PID_SIMULTANEOUS_MAX 3
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#define PID_BLOCK_LOAD_REPORT 2
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static volatile unsigned char gamepad_vibrate = 0; // output
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static unsigned char vibration_on = 0;
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static unsigned char constant_force = 0;
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static unsigned char magnitude = 0;
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static unsigned char _FFB_effect_index;
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#define LOOP_MAX 0xFFFF
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static unsigned int _loop_count;
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static unsigned char gamepad_report0[REPORT_SIZE];
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static unsigned char hid_report_data[8]; // Used for force feedback
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void usbpad_init()
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{
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}
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int usbpad_getReportSize(void)
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{
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return REPORT_SIZE;
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}
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static int16_t minmax(int16_t input, int16_t min, int16_t max)
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{
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if (input > max)
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return max;
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if (input < min)
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return min;
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return input;
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}
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static void btnsToReport(unsigned short buttons, unsigned char dstbuf[2])
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{
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dstbuf[0] = buttons & 0xff;
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dstbuf[1] = buttons >> 8;
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}
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static void buildIdleReport(unsigned char dstbuf[REPORT_SIZE])
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{
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int i;
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dstbuf[0] = REPORT_ID;
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/* Inactive and centered axis */
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for (i=0; i<6; i++) {
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dstbuf[1+i*2] = 0x80;
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dstbuf[2+i*2] = 0x3e;
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}
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/* Inactive buttons */
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dstbuf[13] = 0;
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dstbuf[14] = 0;
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}
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static void buildReportFromGC(const gc_pad_data *gc_data, unsigned char dstbuf[REPORT_SIZE])
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{
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int16_t xval,yval,cxval,cyval,ltrig,rtrig;
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uint16_t buttons;
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/* Force official range */
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xval = minmax(gc_data->x, -100, 100);
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yval = minmax(gc_data->y, -100, 100);
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cxval = minmax(gc_data->cx, -100, 100);
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cyval = minmax(gc_data->cy, -100, 100);
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ltrig = gc_data->lt;
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rtrig = gc_data->rt;
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/* Scale -100 ... + 1000 to -16000 ... +16000 */
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xval *= 160;
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yval *= -160;
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// TODO : Is C-stick different?
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cxval *= 160;
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cyval *= -160;
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if (g_eeprom_data.cfg.flags & FLAG_GC_FULL_SLIDERS) {
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int16_t lts = (int16_t)ltrig - 127;
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int16_t rts = (int16_t)rtrig - 127;
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lts *= 126;
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ltrig = lts;
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rts *= 126;
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rtrig = rts;
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} else {
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/* Scale 0...255 to 0...16000 */
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ltrig *= 63;
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if (ltrig > 16000) ltrig=16000;
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rtrig *= 63;
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if (rtrig > 16000) rtrig=16000;
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}
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if (g_eeprom_data.cfg.flags & FLAG_GC_INVERT_TRIGS) {
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ltrig = -ltrig;
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rtrig = -rtrig;
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}
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/* Unsign for HID report */
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xval += 16000;
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yval += 16000;
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cxval += 16000;
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cyval += 16000;
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ltrig += 16000;
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rtrig += 16000;
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dstbuf[1] = ((uint8_t*)&xval)[0];
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dstbuf[2] = ((uint8_t*)&xval)[1];
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dstbuf[3] = ((uint8_t*)&yval)[0];
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dstbuf[4] = ((uint8_t*)&yval)[1];
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dstbuf[5] = ((uint8_t*)&cxval)[0];
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dstbuf[6] = ((uint8_t*)&cxval)[1];
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dstbuf[7] = ((uint8_t*)&cyval)[0];
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dstbuf[8] = ((uint8_t*)&cyval)[1];
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dstbuf[9] = ((uint8_t*)<rig)[0];
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dstbuf[10] = ((uint8_t*)<rig)[1];
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dstbuf[11] = ((uint8_t*)&rtrig)[0];
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dstbuf[12] = ((uint8_t*)&rtrig)[1];
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buttons = mappings_do(MAPPING_GAMECUBE_DEFAULT, gc_data->buttons);
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btnsToReport(buttons, dstbuf+13);
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}
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static void buildReportFromN64(const n64_pad_data *n64_data, unsigned char dstbuf[REPORT_SIZE])
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{
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int16_t xval, yval;
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uint16_t buttons;
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/* Force official range */
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xval = minmax(n64_data->x, -80, 80);
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yval = minmax(n64_data->y, -80, 80);
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/* Scale -80 ... +80 to -16000 ... +16000 */
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xval *= 200;
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yval *= 200;
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yval = -yval;
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/* Unsign for HID report */
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xval += 16000;
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yval += 16000;
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dstbuf[1] = ((uint8_t*)&xval)[0];
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dstbuf[2] = ((uint8_t*)&xval)[1];
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dstbuf[3] = ((uint8_t*)&yval)[0];
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dstbuf[4] = ((uint8_t*)&yval)[1];
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buttons = mappings_do(MAPPING_N64_DEFAULT, n64_data->buttons);
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btnsToReport(buttons, dstbuf+13);
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}
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void usbpad_update(const gamepad_data *pad_data)
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{
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/* Always start with an idle report. Specific report builders can just
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* simply ignore unused parts */
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buildIdleReport(gamepad_report0);
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if (pad_data)
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{
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switch (pad_data->pad_type)
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{
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case PAD_TYPE_N64:
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buildReportFromN64(&pad_data->n64, gamepad_report0);
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break;
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case PAD_TYPE_GAMECUBE:
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buildReportFromGC(&pad_data->gc, gamepad_report0);
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break;
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default:
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break;
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}
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}
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}
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char usbpad_mustVibrate(void)
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{
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if (!vibration_on) {
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gamepad_vibrate = 0;
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} else {
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if (constant_force > 0x7f) {
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gamepad_vibrate = 1;
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}
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if (magnitude > 0x7f) {
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gamepad_vibrate = 1;
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}
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}
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return gamepad_vibrate;
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}
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unsigned char *usbpad_getReportBuffer(void)
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{
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return gamepad_report0;
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}
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uint16_t usbpad_hid_get_report(struct usb_request *rq, const uint8_t **dat)
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{
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uint8_t report_id = (rq->wValue & 0xff);
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// USB HID 1.11 section 7.2.1 Get_Report
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// wValue high byte : report type
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// wValue low byte : report id
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// wIndex Interface
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switch (rq->wValue >> 8)
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{
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case HID_REPORT_TYPE_INPUT:
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{
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if (report_id == 1) { // Joystick
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// report_id = rq->wValue & 0xff
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// interface = rq->wIndex
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*dat = gamepad_report0;
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printf_P(PSTR("Get joy report\r\n"));
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return 9;
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} else if (report_id == 2) { // 2 : ES playing
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hid_report_data[0] = report_id;
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hid_report_data[1] = 0;
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hid_report_data[2] = _FFB_effect_index;
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printf_P(PSTR("ES playing\r\n"));
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*dat = hid_report_data;
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return 3;
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} else {
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printf_P(PSTR("Get input report %d ??\r\n"), rq->wValue & 0xff);
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}
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}
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break;
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case HID_REPORT_TYPE_FEATURE:
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if (report_id == PID_BLOCK_LOAD_REPORT) {
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hid_report_data[0] = report_id;
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hid_report_data[1] = 0x1; // Effect block index
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hid_report_data[2] = 0x1; // (1: success, 2: oom, 3: load error)
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hid_report_data[3] = 10;
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hid_report_data[4] = 10;
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printf_P(PSTR("block load\r\n"));
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*dat = hid_report_data;
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return 5;
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}
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else if (report_id == PID_SIMULTANEOUS_MAX) {
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hid_report_data[0] = report_id;
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// ROM Effect Block count
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hid_report_data[1] = 0x1;
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hid_report_data[2] = 0x1;
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// PID pool move report?
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hid_report_data[3] = 0xff;
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hid_report_data[4] = 1;
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printf_P(PSTR("simultaneous max\r\n"));
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*dat = hid_report_data;
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return 5;
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}
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else if (report_id == REPORT_CREATE_EFFECT) {
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hid_report_data[0] = report_id;
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hid_report_data[1] = 1;
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printf_P(PSTR("create effect\r\n"));
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*dat = hid_report_data;
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return 2;
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} else {
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printf_P(PSTR("Unknown feature %d\r\n"), rq->wValue & 0xff);
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}
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break;
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}
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printf_P(PSTR("Unhandled hid get report type=0x%02x, rq=0x%02x, wVal=0x%04x, wLen=0x%04x\r\n"), rq->bmRequestType, rq->bRequest, rq->wValue, rq->wLength);
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return 0;
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}
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uint8_t usbpad_hid_set_report(const struct usb_request *rq, const uint8_t *data, uint16_t len)
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{
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if (len < 1) {
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printf_P(PSTR("shrt\n"));
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return -1;
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}
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if ((rq->wValue >> 8) == HID_REPORT_TYPE_OUTPUT) {
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switch(data[0])
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{
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case REPORT_SET_STATUS:
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printf_P(PSTR("eff. set stat 0x%02x 0x%02x\r\n"),data[1],data[2]);
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break;
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case REPORT_EFFECT_BLOCK_IDX:
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printf_P(PSTR("eff. blk. idx %d\r\n"), data[1]);
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break;
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case REPORT_DISABLE_ACTUATORS:
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printf_P(PSTR("disable actuators\r\n"));
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break;
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case REPORT_PID_POOL:
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printf_P(PSTR("pid pool\r\n"));
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break;
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case REPORT_SET_EFFECT:
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_FFB_effect_index = data[1];
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printf_P(PSTR("set effect %d\n"), data[1]);
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break;
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case REPORT_SET_PERIODIC:
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magnitude = data[2];
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printf_P(PSTR("periodic mag: %d"), data[2]);
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break;
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case REPORT_SET_CONSTANT_FORCE:
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if (data[1] == 1) {
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constant_force = data[2];
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//decideVibration();
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printf_P(PSTR("Constant force"));
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}
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break;
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case REPORT_EFFECT_OPERATION:
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if (len != 4)
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return -1;
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/* Byte 0 : report ID
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* Byte 1 : bit 7=rom flag, bits 6-0=effect block index
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* Byte 2 : Effect operation
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* Byte 3 : Loop count */
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_loop_count = data[3]<<3;
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printf_P(PSTR("EFFECT OP: rom=%s, idx=0x%02x"), data[1] & 0x80 ? "Yes":"No", data[1] & 0x7F);
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switch(data[1] & 0x7F) // Effect block index
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{
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case 1: // constant force
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case 3: // square
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case 4: // sine
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switch (data[2]) // effect operation
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{
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case EFFECT_OP_START:
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printf_P(PSTR("Start\r\n"));
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vibration_on = 1;
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// decideVibration();
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break;
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case EFFECT_OP_START_SOLO:
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printf_P(PSTR("Start solo\r\n"));
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vibration_on = 1;
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// decideVibration();
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break;
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case EFFECT_OP_STOP:
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printf_P(PSTR("Stop\r\n"));
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vibration_on = 0;
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// decideVibration();
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break;
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}
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break;
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// TODO : should probably drop these from the descriptor since they are
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case 2: // ramp
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case 5: // triangle
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case 6: // sawtooth up
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case 7: // sawtooth down
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case 8: // spring
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case 9: // damper
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case 10: // inertia
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case 11: // friction
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case 12: // custom force data
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printf_P(PSTR("Ununsed effect %d\n"), data[1] & 0x7F);
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break;
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}
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break;
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default:
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printf_P(PSTR("Set output report 0x%02x\r\n"), data[0]);
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}
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}
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else if ((rq->wValue >> 8) == HID_REPORT_TYPE_FEATURE) {
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switch(data[0])
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{
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case REPORT_CREATE_EFFECT:
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_FFB_effect_index = data[1];
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printf_P(PSTR("create effect %d\n"), data[1]);
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break;
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default:
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printf_P(PSTR("What?\n"));
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}
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}
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else {
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printf_P(PSTR("impossible\n"));
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}
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return 0;
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}
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