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RetroArch/input/connect/connect_wii.c
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/* RetroArch - A frontend for libretro.
* Copyright (C) 2013-2014 - Jason Fetters
* Copyright (C) 2011-2017 - Daniel De Matteis
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <boolean.h>
#include <retro_endianness.h>
#include <retro_miscellaneous.h>
#include <retro_timers.h>
#include "joypad_connection.h"
#include "../input_defines.h"
/* wiimote state flags*/
#define WIIMOTE_STATE_DEV_FOUND 0x0001
#define WIIMOTE_STATE_HANDSHAKE 0x0002 /* Actual connection exists but no handshake yet */
#define WIIMOTE_STATE_HANDSHAKE_COMPLETE 0x0004
#define WIIMOTE_STATE_CONNECTED 0x0008
#define WIIMOTE_STATE_EXP 0x0040
/* Communication channels */
#define WM_SET_REPORT 0x50
/* Commands */
#define WM_CMD_LED 0x11
#define WM_CMD_REPORT_TYPE 0x12
#define WM_CMD_RUMBLE 0x13
#define WM_CMD_IR 0x13
#define WM_CMD_CTRL_STATUS 0x15
#define WM_CMD_WRITE_DATA 0x16
#define WM_CMD_READ_DATA 0x17
#define WM_CMD_IR_2 0x1A
/* Input report IDs */
#define WM_RPT_CTRL_STATUS 0x20
#define WM_RPT_READ 0x21
#define WM_RPT_WRITE 0x22
#define WM_RPT_BTN 0x30
#define WM_RPT_BTN_ACC 0x31
#define WM_RPT_BTN_ACC_IR 0x33
#define WM_RPT_BTN_EXP 0x34
#define WM_RPT_BTN_ACC_EXP 0x35
#define WM_RPT_BTN_IR_EXP 0x36
#define WM_RPT_BTN_ACC_IR_EXP 0x37
#define WM_BT_INPUT 0x01
#define WM_BT_OUTPUT 0x02
/* controller status stuff */
#define WM_MAX_BATTERY_CODE 0xC8
/* offsets in wiimote memory */
#define WM_MEM_OFFSET_CALIBRATION 0x16
#define WM_EXP_MEM_BASE 0x04A40000
#define WM_EXP_MEM_ENABLE 0x04A40040
#define WM_EXP_MEM_CALIBR 0x04A40020
#define EXP_HANDSHAKE_LEN 224
/* controller status flags for the first message byte */
/* bit 1 is unknown */
#define WM_CTRL_STATUS_BYTE1_ATTACHMENT 0x02
#define WM_CTRL_STATUS_BYTE1_SPEAKER_ENABLED 0x04
#define WM_CTRL_STATUS_BYTE1_IR_ENABLED 0x08
#define WM_CTRL_STATUS_BYTE1_LED_1 0x10
#define WM_CTRL_STATUS_BYTE1_LED_2 0x20
#define WM_CTRL_STATUS_BYTE1_LED_3 0x40
#define WM_CTRL_STATUS_BYTE1_LED_4 0x80
/* LED bit masks */
#define WIIMOTE_LED_NONE 0x00
#define WIIMOTE_LED_1 0x10
#define WIIMOTE_LED_2 0x20
#define WIIMOTE_LED_3 0x40
#define WIIMOTE_LED_4 0x80
/* button masks */
#define WIIMOTE_BUTTON_ALL 0x1F9F
#define CLASSIC_CTRL_BUTTON_ALL 0xFEFF
/* expansion codes */
#define EXP_NONE 0
#define EXP_CLASSIC 2
#define IDENT_NUNCHUK 0xA4200000
#define IDENT_CC 0xA4200101
typedef struct axis_t
{
bool has_center;
uint8_t min;
uint8_t center;
uint8_t max;
uint8_t raw_value;
float value;
} axis_t;
typedef struct connect_wii_joystick_t
{
axis_t x;
axis_t y;
} connect_wii_joystick_t;
typedef struct connect_wii_classic_ctrl_t
{
int16_t btns;
struct connect_wii_joystick_t ljs;
struct connect_wii_joystick_t rjs;
} connect_wii_classic_ctrl_t;
/* Generic expansion device plugged into wiimote. */
typedef struct connect_wii_expansion_t
{
/* Type of expansion attached. */
int type;
union
{
struct connect_wii_classic_ctrl_t classic;
} cc;
} connect_wii_expansion_t;
/* Wiimote structure. */
typedef struct connect_wii_wiimote_t
{
/* User specified ID. */
int unid;
struct pad_connection* connection;
hid_driver_t *driver;
/* Various state flags. */
uint32_t state;
/* Currently lit LEDs. */
uint8_t leds;
/* Battery level. */
float battery_level;
/* The state of the connection handshake. */
uint8_t handshake_state;
/* Wiimote expansion device. */
struct connect_wii_expansion_t exp;
/* What buttons have just been pressed. */
uint16_t btns;
} connect_wii_wiimote;
/* Macro to manage states */
#define WIIMOTE_IS_SET(wm, s) ((wm->state & (s)) == (s))
#define WIIMOTE_ENABLE_STATE(wm, s) (wm->state |= (s))
#define WIIMOTE_DISABLE_STATE(wm, s) (wm->state &= ~(s))
#define WIIMOTE_TOGGLE_STATE(wm, s) ((wm->state & (s)) ? WIIMOTE_DISABLE_STATE(wm, s) : WIIMOTE_ENABLE_STATE(wm, s))
static bool wiimote_is_connected(struct connect_wii_wiimote_t *wm)
{
return WIIMOTE_IS_SET(wm, WIIMOTE_STATE_CONNECTED);
}
/*
* Send a packet to the wiimote.
*
* This function should replace any write()s directly to the wiimote device.
*/
static int wiimote_send(struct connect_wii_wiimote_t* wm,
uint8_t report_type, uint8_t* msg, int len)
{
uint8_t buf[32] = {0};
buf[0] = WM_SET_REPORT | WM_BT_OUTPUT;
buf[1] = report_type;
memcpy(buf+2, msg, len);
wm->driver->send_control(wm->connection, buf, len + 2);
return 1;
}
/*
* Request the wiimote controller status.
*
* Controller status includes: battery level, LED status, expansions.
*/
static void wiimote_status(struct connect_wii_wiimote_t* wm)
{
uint8_t buf = 0;
if (!wm || !wiimote_is_connected(wm))
return;
wiimote_send(wm, WM_CMD_CTRL_STATUS, &buf, 1);
}
static void wiimote_data_report(struct connect_wii_wiimote_t* wm, uint8_t type)
{
uint8_t buf[2] = {0x0,0x0};
if (!wm || !wiimote_is_connected(wm))
return;
buf[1] = type;
/* CUIDADO es un &buf? */
wiimote_send(wm, WM_CMD_REPORT_TYPE, buf, 2);
}
/*
* Set the enabled LEDs.
*
* leds is a bitwise OR of:
* - WIIMOTE_LED_1
* - WIIMOTE_LED_2
* - WIIMOTE_LED_3
* - WIIMOTE_LED_4
*/
static void wiimote_set_leds(struct connect_wii_wiimote_t* wm, int leds)
{
uint8_t buf = {0};
if (!wm || !wiimote_is_connected(wm))
return;
/* Remove the lower 4 bits because they control rumble. */
wm->leds = (leds & 0xF0);
buf = wm->leds;
wiimote_send(wm, WM_CMD_LED, &buf, 1);
}
/* Find what buttons are pressed. */
static void wiimote_pressed_buttons(struct connect_wii_wiimote_t* wm, uint8_t* msg)
{
/* Convert to big endian. */
int16_t *val = (int16_t*)msg;
int16_t now = swap_if_little16(*val) & WIIMOTE_BUTTON_ALL;
wm->btns = now;
}
static int wiimote_classic_ctrl_handshake(struct connect_wii_wiimote_t* wm,
struct connect_wii_classic_ctrl_t* cc, uint8_t* data, uint16_t len)
{
memset(cc, 0, sizeof(*cc));
wm->exp.type = EXP_CLASSIC;
return 1;
}
static float wiimote_normalize_and_interpolate(float min, float max, float t)
{
if (min == max)
return 0.0f;
return (t - min) / (max - min);
}
static void wiimote_process_axis(struct axis_t* axis, uint8_t raw)
{
if (!axis->has_center)
{
axis->has_center = true;
axis->min = raw - 2;
axis->center = raw;
axis->max = raw + 2;
}
if (raw < axis->min)
axis->min = raw;
if (raw > axis->max)
axis->max = raw;
axis->raw_value = raw;
if (raw < axis->center)
axis->value = -wiimote_normalize_and_interpolate(
axis->center, axis->min, raw);
else if (raw > axis->center)
axis->value = wiimote_normalize_and_interpolate(
axis->center, axis->max, raw);
else
axis->value = 0;
}
static void classic_ctrl_event(struct connect_wii_classic_ctrl_t* cc, uint8_t* msg)
{
if (!cc)
return;
cc->btns = ~swap_if_little16(*(int16_t*)(msg + 4)) & CLASSIC_CTRL_BUTTON_ALL;
wiimote_process_axis(&cc->ljs.x, (msg[0] & 0x3F));
wiimote_process_axis(&cc->ljs.y, (msg[1] & 0x3F));
wiimote_process_axis(&cc->rjs.x, ((msg[0] & 0xC0) >> 3) |
((msg[1] & 0xC0) >> 5) | ((msg[2] & 0x80) >> 7));
wiimote_process_axis(&cc->rjs.y, (msg[2] & 0x1F));
}
/*
* Handle data from the expansion.
*/
static void wiimote_handle_expansion(struct connect_wii_wiimote_t* wm, uint8_t* msg)
{
switch (wm->exp.type)
{
case EXP_CLASSIC:
classic_ctrl_event(&wm->exp.cc.classic, msg);
break;
default:
break;
}
}
/*
* Write data to the wiimote.
*/
static int wiimote_write_data(struct connect_wii_wiimote_t* wm,
uint32_t addr, uint8_t* data, uint8_t len)
{
uint8_t buf[21] = {0}; /* the payload is always 23 */
int32_t *buf32 = (int32_t*)buf;
if (!wm || !wiimote_is_connected(wm))
return 0;
if (!data || !len)
return 0;
/* the offset is in big endian */
*buf32 = swap_if_little32(addr);
/* length */
*(uint8_t*)(buf + 4) = len;
/* data */
memcpy(buf + 5, data, len);
wiimote_send(wm, WM_CMD_WRITE_DATA, buf, 21);
return 1;
}
/*
* Read data from the wiimote (event version).
*
* The library can only handle one data read request at a time
* because it must keep track of the buffer and other
* events that are specific to that request. So if a request
* has already been made, subsequent requests will be added
* to a pending list and be sent out when the previous
* finishes.
*/
static int wiimote_read_data(struct connect_wii_wiimote_t* wm, uint32_t addr,
uint16_t len)
{
uint8_t buf[6] = {0};
int32_t *buf32 = (int32_t*)buf;
int16_t *buf16 = (int16_t*)(buf + 4);
/* No puden ser mas de 16 lo leido o vendra en trozos! */
if (!wm || !wiimote_is_connected(wm) || !len)
return 0;
/* the offsets are in big endian */
*buf32 = swap_if_little32(addr);
*buf16 = swap_if_little16(len);
wiimote_send(wm, WM_CMD_READ_DATA, buf, 6);
return 1;
}
/*
* Get initialization data from the Wiimote.
*
* When first called for a connect_wii_wiimote_t structure, a request
* is sent to the wiimote for initialization information.
* This includes factory set accelerometer data.
* The handshake will be concluded when the wiimote responds
* with this data.
*/
static int wiimote_handshake(struct connect_wii_wiimote_t* wm,
uint8_t event, uint8_t* data, uint16_t len)
{
if (!wm)
return 0;
for (;;)
{
switch (wm->handshake_state)
{
case 0:
/* no ha habido nunca handshake, debemos forzar un
* mensaje de staus para ver que pasa. */
WIIMOTE_ENABLE_STATE(wm, WIIMOTE_STATE_HANDSHAKE);
wiimote_set_leds(wm, WIIMOTE_LED_NONE);
/* Request the status of the Wiimote to
* see if there is an expansion */
wiimote_status(wm);
wm->handshake_state=1;
return 0;
case 1:
{
/* estamos haciendo handshake o bien se necesita iniciar un
* nuevo handshake ya que se inserta(quita una expansion. */
int attachment = 0;
if (event != WM_RPT_CTRL_STATUS)
return 0;
/* Is an attachment connected to
* the expansion port? */
if ((data[2] & WM_CTRL_STATUS_BYTE1_ATTACHMENT) ==
WM_CTRL_STATUS_BYTE1_ATTACHMENT)
attachment = 1;
if (attachment && !WIIMOTE_IS_SET(wm, WIIMOTE_STATE_EXP))
{
uint8_t buf = 0;
/* Expansion port */
WIIMOTE_ENABLE_STATE(wm, WIIMOTE_STATE_EXP);
/* Send the initialization code for the attachment */
if (WIIMOTE_IS_SET(wm,WIIMOTE_STATE_HANDSHAKE_COMPLETE))
{
/* Rehandshake. */
WIIMOTE_DISABLE_STATE(wm, WIIMOTE_STATE_HANDSHAKE_COMPLETE);
/* forzamos un handshake por si venimos
* de un hanshake completo. */
WIIMOTE_ENABLE_STATE(wm, WIIMOTE_STATE_HANDSHAKE);
}
/*Old way. initialize the extension was by writing the
* single encryption byte 0x00 to 0x(4)A40040. */
#if 0
buf = 0x00;
wiimote_write_data(wm, WM_EXP_MEM_ENABLE, &buf, 1);
#endif
/* NEW WAY 0x55 to 0x(4)A400F0, then writing
* 0x00 to 0x(4)A400FB. (support clones) */
buf = 0x55;
wiimote_write_data(wm, 0x04A400F0, &buf, 1);
retro_sleep(100);
buf = 0x00;
wiimote_write_data(wm, 0x04A400FB, &buf, 1);
/* check extension type! */
retro_sleep(100);
wiimote_read_data(wm, WM_EXP_MEM_CALIBR + 220, 4);
#if 0
wiimote_read_data(wm, WM_EXP_MEM_CALIBR, EXP_HANDSHAKE_LEN);
#endif
wm->handshake_state = 4;
return 0;
}
else if (!attachment && WIIMOTE_IS_SET(wm, WIIMOTE_STATE_EXP))
{
/* Attachment removed */
WIIMOTE_DISABLE_STATE(wm, WIIMOTE_STATE_EXP);
wm->exp.type = EXP_NONE;
if (WIIMOTE_IS_SET(wm,WIIMOTE_STATE_HANDSHAKE_COMPLETE))
{
WIIMOTE_DISABLE_STATE(wm, WIIMOTE_STATE_HANDSHAKE_COMPLETE);
/* forzamos un handshake por si venimos
* de un hanshake completo. */
WIIMOTE_ENABLE_STATE(wm, WIIMOTE_STATE_HANDSHAKE);
}
}
if (!attachment && WIIMOTE_IS_SET(wm,WIIMOTE_STATE_HANDSHAKE))
{
wm->handshake_state = 2;
continue;
}
return 0;
}
case 2:
/* Find handshake no expansion. */
wiimote_data_report(wm,WM_RPT_BTN);
wm->handshake_state = 6;
continue;
case 3:
/* Find handshake expansion. */
wiimote_data_report(wm,WM_RPT_BTN_EXP);
wm->handshake_state = 6;
continue;
case 4:
{
uint32_t id;
int32_t *ptr = (int32_t*)data;
if (event != WM_RPT_READ)
return 0;
id = swap_if_little32(*ptr);
switch (id)
{
case IDENT_CC:
retro_sleep(100);
/* pedimos datos de calibracion del JOY! */
wiimote_read_data(wm, WM_EXP_MEM_CALIBR, 16);
wm->handshake_state = 5;
break;
default:
wm->handshake_state = 2;
#if 0
WIIMOTE_DISABLE_STATE(wm, WIIMOTE_STATE_EXP);
#endif
continue;
}
}
return 0;
case 5:
if (event != WM_RPT_READ)
return 0;
wiimote_classic_ctrl_handshake(wm, &wm->exp.cc.classic, data,len);
wm->handshake_state = 3;
continue;
case 6:
WIIMOTE_DISABLE_STATE(wm, WIIMOTE_STATE_HANDSHAKE);
WIIMOTE_ENABLE_STATE(wm, WIIMOTE_STATE_HANDSHAKE_COMPLETE);
wm->handshake_state = 1;
switch (wm->unid)
{
case 0:
wiimote_set_leds(wm, WIIMOTE_LED_1);
break;
case 1:
wiimote_set_leds(wm, WIIMOTE_LED_2);
break;
case 2:
wiimote_set_leds(wm, WIIMOTE_LED_3);
break;
case 3:
wiimote_set_leds(wm, WIIMOTE_LED_4);
break;
}
return 1;
default:
break;
}
}
}
static void hidpad_wii_deinit(void *data)
{
struct connect_wii_wiimote_t* device = (struct connect_wii_wiimote_t*)data;
if (device)
free(device);
}
static void* hidpad_wii_init(void *data, uint32_t slot,
hid_driver_t *driver)
{
struct pad_connection *connection = (struct pad_connection*)data;
struct connect_wii_wiimote_t *device = (struct connect_wii_wiimote_t*)
calloc(1, sizeof(struct connect_wii_wiimote_t));
if (!device)
goto error;
if (!connection)
goto error;
device->connection = connection;
device->unid = slot;
device->state = WIIMOTE_STATE_CONNECTED;
device->exp.type = EXP_NONE;
device->driver = driver;
wiimote_handshake(device, -1, NULL, -1);
return device;
error:
hidpad_wii_deinit(device);
return NULL;
}
static int16_t hidpad_wii_get_axis(void *data, unsigned axis)
{
struct connect_wii_wiimote_t* device = (struct connect_wii_wiimote_t*)data;
if (!device)
return 0;
switch (device->exp.type)
{
case EXP_CLASSIC:
switch (axis)
{
case 0:
return device->exp.cc.classic.ljs.x.value * 0x7FFF;
case 1:
return device->exp.cc.classic.ljs.y.value * 0x7FFF;
case 2:
return device->exp.cc.classic.rjs.x.value * 0x7FFF;
case 3:
return device->exp.cc.classic.rjs.y.value * 0x7FFF;
}
break;
default:
break;
}
return 0;
}
static void hidpad_wii_get_buttons(void *data, input_bits_t *state)
{
struct connect_wii_wiimote_t* device = (struct connect_wii_wiimote_t*)data;
if ( device )
{
/* TODO/FIXME - Broken? this doesn't match retropad! */
uint32_t b = device->btns | (device->exp.cc.classic.btns << 16);
BITS_COPY32_PTR(state, b);
}
}
static void hidpad_wii_packet_handler(void *data,
uint8_t *packet, uint16_t size)
{
struct connect_wii_wiimote_t* device = (struct connect_wii_wiimote_t*)data;
uint8_t *msg = packet + 1;
if (!device)
return;
switch (packet[0])
{
case WM_RPT_BTN:
wiimote_pressed_buttons(device, msg);
break;
case WM_RPT_READ:
wiimote_pressed_buttons(device, msg);
wiimote_handshake(device, WM_RPT_READ, msg + 5,
((msg[2] & 0xF0) >> 4) + 1);
break;
case WM_RPT_CTRL_STATUS:
wiimote_pressed_buttons(device, msg);
wiimote_handshake(device,WM_RPT_CTRL_STATUS,msg,-1);
break;
case WM_RPT_BTN_EXP:
wiimote_pressed_buttons(device, msg);
wiimote_handle_expansion(device, msg+2);
break;
}
}
static void hidpad_wii_set_rumble(void *data,
enum retro_rumble_effect effect, uint16_t strength)
{
/* TODO */
(void)data;
(void)effect;
(void)strength;
}
/* TODO: implement hidpad_wii_button(). */
pad_connection_interface_t pad_connection_wii = {
hidpad_wii_init,
hidpad_wii_deinit,
hidpad_wii_packet_handler,
hidpad_wii_set_rumble,
hidpad_wii_get_buttons,
hidpad_wii_get_axis,
NULL, /* get_name */
NULL, /* button */
false,
};
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