236 lines
6.7 KiB
C
236 lines
6.7 KiB
C
/* Saturn to USB : Sega dc controllers to USB adapter
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* Copyright (C) 2011-2013 Raphaël Assénat
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* The author may be contacted at raph@raphnet.net
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*/
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <util/delay.h>
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#include <avr/pgmspace.h>
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#include <string.h>
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#include "usbdrv.h"
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#include "gamepad.h"
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#include "dc_pad.h"
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#include "maplebus.h"
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#define MAX_REPORT_SIZE 4
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#define NUM_REPORTS 1
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// report matching the most recent bytes from the controller
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static unsigned char last_built_report[NUM_REPORTS][MAX_REPORT_SIZE];
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// the most recently reported bytes
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static unsigned char last_sent_report[NUM_REPORTS][MAX_REPORT_SIZE];
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static char report_sizes[NUM_REPORTS] = { 4 };
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static Gamepad dcGamepad;
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static void dcUpdate(void);
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/*
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* [0] X
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* [1] Y
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* [2] Btn 0-7
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* [3] Btn 8-15
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*/
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static const unsigned char dcPadReport[] PROGMEM = {
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0x05, 0x01, // USAGE_PAGE (Generic Desktop)
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0x09, 0x05, // USAGE (Game pad)
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0xa1, 0x01, // COLLECTION (Application)
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0x09, 0x01, // USAGE (Pointer)
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0xa1, 0x00, // COLLECTION (Physical)
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0x09, 0x30, // USAGE (X)
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0x09, 0x31, // USAGE (Y)
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0x15, 0x00, // LOGICAL_MINIMUM (0)
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0x26, 0xff, 0x00, // LOGICAL_MAXIMUM (255)
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0x75, 0x08, // REPORT_SIZE (8)
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0x95, 0x02, // REPORT_COUNT (2)
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0x81, 0x02, // INPUT (Data,Var,Abs)
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0x05, 0x09, // USAGE_PAGE (Button)
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0x19, 0x01, // USAGE_MINIMUM (Button 1)
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0x29, 0x10, // USAGE_MAXIMUM (Button 16)
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0x15, 0x00, // LOGICAL_MINIMUM (0)
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0x25, 0x01, // LOGICAL_MAXIMUM (1)
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0x75, 0x01, // REPORT_SIZE (1)
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0x95, 0x10, // REPORT_COUNT (16)
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0x81, 0x02, // INPUT (Data,Var,Abs)
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0xc0, // END_COLLECTION
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0xc0, // END_COLLECTION
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};
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const unsigned char dcPadDevDesc[] PROGMEM = { /* USB device descriptor */
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18, /* sizeof(usbDescrDevice): length of descriptor in bytes */
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USBDESCR_DEVICE, /* descriptor type */
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0x01, 0x01, /* USB version supported */
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USB_CFG_DEVICE_CLASS,
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USB_CFG_DEVICE_SUBCLASS,
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0, /* protocol */
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8, /* max packet size */
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0x9B, 0x28, // Vendor ID
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0x08, 0x00, // Product ID
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0x00, 0x01, // Version: Minor, Major
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1, // Manufacturer String
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2, // Product string
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3, // Serial number string
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1, /* number of configurations */
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};
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static void dcInit(void)
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{
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dcUpdate();
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dcGamepad.reportDescriptor = (void*)dcPadReport;
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dcGamepad.reportDescriptorSize = sizeof(dcPadReport);
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dcGamepad.deviceDescriptor = (void*)dcPadDevDesc;
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dcGamepad.deviceDescriptorSize = sizeof(dcPadDevDesc);
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}
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#define MAX_ERRORS 10
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#define STATE_GET_INFO 0
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#define STATE_WRITE_LCD 1
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#define STATE_READ_PAD 2
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#define MAPLE_CMD_RQ_DEV_INFO 1
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#define MAPLE_CMD_RESET_DEVICE 3
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#define MAPLE_CMD_GET_CONDITION 9
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#define MAPLE_CMD_BLOCK_WRITE 12
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#define MAPLE_ADDR_PORT(id) ((id)<<6)
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#define MAPLE_ADDR_PORTA MAPLE_ADDR_PORT(0)
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#define MAPLE_ADDR_PORTB MAPLE_ADDR_PORT(1)
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#define MAPLE_ADDR_PORTC MAPLE_ADDR_PORT(2)
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#define MAPLE_ADDR_PORTD MAPLE_ADDR_PORT(3)
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#define MAPLE_ADDR_MAIN 0x20
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#define MAPLE_ADDR_SUB(id) ((1)<<id) /* where id is 0 to 4 */
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#define MAPLE_DC_ADDR 0
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#define MAPLE_HEADER(cmd,dst_addr,src_addr,len) ( (((cmd)&0xfful)<<24) | (((dst_addr)&0xfful)<<16) | (((src_addr)&0xfful)<<8) | ((len)&0xff))
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static uint32_t request_device_info[1] = { MAPLE_HEADER(MAPLE_CMD_RQ_DEV_INFO, MAPLE_ADDR_MAIN | MAPLE_ADDR_PORTA, MAPLE_DC_ADDR, 0) };
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static uint32_t get_condition[2] = { 0x09200001, 0x00000001 };
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static uint32_t block_write_lcd[4] = { 0x0c300003, 0x004, 0, 0xf0f0f0f0 };
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static void dcReadPad(void)
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{
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static unsigned char state = STATE_GET_INFO;
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static unsigned char err_count = 0;
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static unsigned char controller_address = 0;
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unsigned char tmp[30];
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int v;
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switch (state)
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{
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case STATE_GET_INFO:
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maple_sendFrame(request_device_info, 1);
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v = maple_receivePacket(tmp, 30);
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_delay_ms(2);
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if (v==-2) {
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controller_address = tmp[1]; // sender address
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state = STATE_WRITE_LCD;
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}
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break;
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case STATE_WRITE_LCD:
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{
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int i;
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for (i=0; i<5; i++)
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{
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uint32_t request_device_info1[1] = { MAPLE_HEADER(MAPLE_CMD_RQ_DEV_INFO, MAPLE_ADDR_PORTA | MAPLE_ADDR_SUB(i), MAPLE_DC_ADDR, 0) };
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if (controller_address & (1<<i)) {
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maple_sendFrame(request_device_info1, 1);
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_delay_us(300);
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}
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}
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}
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break;
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case STATE_READ_PAD:
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maple_sendFrame(get_condition, 2);
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v = maple_receivePacket(tmp, 30);
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if (v<=0) {
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err_count++;
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if (err_count > MAX_ERRORS)
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state = STATE_GET_INFO;
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return;
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}
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err_count = 0;
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// 8 : Buttons
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// 9 : Buttons
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// 10 : R trig
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// 11 : L trig
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// 12 : Joy X axis
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// 13 : Joy Y axis
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// 14 : Joy X2 axis
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// 15 : Joy Y2 axis
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last_built_report[0][0] = tmp[12]-1;
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last_built_report[0][1] = tmp[13]-1;
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last_built_report[0][2] = tmp[8] ^ 0xff;
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last_built_report[0][3] = tmp[9] ^ 0xff;
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break;
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}
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}
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static void dcUpdate(void)
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{
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dcReadPad();
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}
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static char dcBuildReport(unsigned char *reportBuffer, unsigned char report_id)
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{
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report_id = 0;
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if (reportBuffer != NULL)
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{
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memcpy(reportBuffer, last_built_report[report_id], report_sizes[report_id]);
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}
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memcpy(last_sent_report[report_id], last_built_report[report_id],
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report_sizes[report_id]);
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return report_sizes[report_id];
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}
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static char dcChanged(unsigned char report_id)
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{
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report_id = 0;
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return memcmp(last_built_report[report_id], last_sent_report[report_id],
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report_sizes[report_id]);
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}
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static Gamepad dcGamepad = {
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num_reports: 1,
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init: dcInit,
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update: dcUpdate,
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changed: dcChanged,
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buildReport: dcBuildReport
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};
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Gamepad *dcGetGamepad(void)
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{
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return &dcGamepad;
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}
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