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RetroArch/apple/iOS/bluetooth/btpad.c

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2013 - Jason Fetters
*
* 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/>.
*/
// I take back everything I ever said about bad bluetooth stacks, this shit is hard.
#include <sys/types.h>
#include <sys/sysctl.h>
#include <stdio.h>
#include <string.h>
#include "apple/common/rarch_wrapper.h"
#include "btdynamic.h"
#include "btpad.h"
#include "btpad_queue.h"
// Private interface
enum btpad_state { BTPAD_EMPTY, BTPAD_CONNECTING, BTPAD_CONNECTED };
struct apple_pad_connection
{
uint32_t slot;
enum btpad_state state;
bool has_address;
bd_addr_t address;
uint16_t handle;
uint16_t channels[2]; //0: Control, 1: Interrupt
};
static struct apple_pad_connection g_connections[MAX_PLAYERS];
void apple_pad_send_control(struct apple_pad_connection* connection, uint8_t* data, size_t size)
{
bt_send_l2cap_ptr(connection->channels[0], data, size);
}
static bool inquiry_off;
static bool inquiry_running;
// External interface (MAIN THREAD ONLY)
void btpad_set_inquiry_state(bool on)
{
inquiry_off = !on;
if (!inquiry_off && !inquiry_running)
btpad_queue_hci_inquiry(HCI_INQUIRY_LAP, 3, 1);
}
// Internal interface:
static struct apple_pad_connection* btpad_find_empty_connection()
{
for (int i = 0; i != MAX_PLAYERS; i ++)
if (g_connections[i].state == BTPAD_EMPTY)
return &g_connections[i];
return 0;
}
static struct apple_pad_connection* btpad_find_connection_for(uint16_t handle, bd_addr_t address)
{
for (int i = 0; i < MAX_PLAYERS; i ++)
{
if (!g_connections[i].handle && !g_connections[i].has_address)
continue;
if (handle && g_connections[i].handle && handle != g_connections[i].handle)
continue;
if (address && g_connections[i].has_address && (BD_ADDR_CMP(address, g_connections[i].address)))
continue;
return &g_connections[i];
}
return 0;
}
static void btpad_close_connection(struct apple_pad_connection* connection)
{
if (connection->handle)
btpad_queue_hci_disconnect(connection->handle, 0x15);
memset(connection, 0, sizeof(struct apple_pad_connection));
}
static void btpad_close_all_connections()
{
for (int i = 0; i < MAX_PLAYERS; i ++)
btpad_close_connection(&g_connections[i]);
}
void btpad_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size)
{
bd_addr_t event_addr;
if (packet_type == HCI_EVENT_PACKET)
{
switch (packet[0])
{
case BTSTACK_EVENT_STATE:
{
if (packet[2] == HCI_STATE_WORKING)
{
btpad_queue_reset();
btpad_queue_hci_read_bd_addr();
bt_send_cmd_ptr(l2cap_register_service_ptr, PSM_HID_CONTROL, 672); // TODO: Where did I get 672 for mtu?
bt_send_cmd_ptr(l2cap_register_service_ptr, PSM_HID_INTERRUPT, 672);
btpad_queue_hci_inquiry(HCI_INQUIRY_LAP, 3, 1);
btpad_queue_run(1);
}
else if(packet[2] > HCI_STATE_WORKING)
{
btpad_close_all_connections();
}
}
break;
case HCI_EVENT_COMMAND_STATUS:
{
btpad_queue_run(packet[3]);
}
break;
case HCI_EVENT_COMMAND_COMPLETE:
{
btpad_queue_run(packet[2]);
if (COMMAND_COMPLETE_EVENT(packet, (*hci_read_bd_addr_ptr)))
{
bt_flip_addr_ptr(event_addr, &packet[6]);
if (!packet[5]) ios_add_log_message("BTpad: Local address is %s", bd_addr_to_str_ptr(event_addr));
else ios_add_log_message("BTpad: Failed to get local address (Status: %02X)", packet[5]);
}
}
break;
case HCI_EVENT_INQUIRY_RESULT:
{
if (packet[2])
{
bt_flip_addr_ptr(event_addr, &packet[3]);
struct apple_pad_connection* connection = btpad_find_empty_connection();
if (connection)
{
ios_add_log_message("BTpad: Inquiry found device");
memset(connection, 0, sizeof(struct apple_pad_connection));
memcpy(connection->address, event_addr, sizeof(bd_addr_t));
connection->has_address = true;
connection->state = BTPAD_CONNECTING;
bt_send_cmd_ptr(l2cap_create_channel_ptr, connection->address, PSM_HID_CONTROL);
bt_send_cmd_ptr(l2cap_create_channel_ptr, connection->address, PSM_HID_INTERRUPT);
}
}
}
break;
case HCI_EVENT_INQUIRY_COMPLETE:
{
// This must be turned off during gameplay as it causes a ton of lag
inquiry_running = !inquiry_off;
if (inquiry_running)
btpad_queue_hci_inquiry(HCI_INQUIRY_LAP, 3, 1);
}
break;
case L2CAP_EVENT_CHANNEL_OPENED:
{
bt_flip_addr_ptr(event_addr, &packet[3]);
const uint16_t handle = READ_BT_16(packet, 9);
const uint16_t psm = READ_BT_16(packet, 11);
const uint16_t channel_id = READ_BT_16(packet, 13);
struct apple_pad_connection* connection = btpad_find_connection_for(handle, event_addr);
if (!packet[2])
{
if (!connection)
{
ios_add_log_message("BTpad: Got L2CAP 'Channel Opened' event for unrecognized device");
break;
}
ios_add_log_message("BTpad: L2CAP channel opened: (PSM: %02X)", psm);
connection->handle = handle;
if (psm == PSM_HID_CONTROL)
connection->channels[0] = channel_id;
else if (psm == PSM_HID_INTERRUPT)
connection->channels[1] = channel_id;
else
ios_add_log_message("BTpad: Got unknown L2CAP PSM, ignoring (PSM: %02X)", psm);
if (connection->channels[0] && connection->channels[1])
{
ios_add_log_message("BTpad: Got both L2CAP channels, requesting name");
btpad_queue_hci_remote_name_request(connection->address, 0, 0, 0);
}
}
else
ios_add_log_message("BTpad: Got failed L2CAP 'Channel Opened' event (PSM: %02X, Status: %02X)", psm, packet[2]);
}
break;
case L2CAP_EVENT_INCOMING_CONNECTION:
{
bt_flip_addr_ptr(event_addr, &packet[2]);
const uint16_t handle = READ_BT_16(packet, 8);
const uint32_t psm = READ_BT_16(packet, 10);
const uint32_t channel_id = READ_BT_16(packet, 12);
struct apple_pad_connection* connection = btpad_find_connection_for(handle, event_addr);
if (!connection)
{
connection = btpad_find_empty_connection();
if (connection)
{
ios_add_log_message("BTpad: Got new incoming connection");
memset(connection, 0, sizeof(struct apple_pad_connection));
memcpy(connection->address, event_addr, sizeof(bd_addr_t));
connection->has_address = true;
connection->handle = handle;
connection->state = BTPAD_CONNECTING;
}
else break;
}
ios_add_log_message("BTpad: Incoming L2CAP connection (PSM: %02X)", psm);
bt_send_cmd_ptr(l2cap_accept_connection_ptr, channel_id);
}
break;
case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE:
{
bt_flip_addr_ptr(event_addr, &packet[3]);
struct apple_pad_connection* connection = btpad_find_connection_for(0, event_addr);
if (!connection)
{
ios_add_log_message("BTpad: Got unexpected remote name, ignoring");
break;
}
ios_add_log_message("BTpad: Got %.200s", (char*)&packet[9]);
connection->slot = apple_joypad_connect((char*)packet + 9, connection);
connection->state = BTPAD_CONNECTED;
}
break;
case HCI_EVENT_PIN_CODE_REQUEST:
{
ios_add_log_message("BTpad: Sending WiiMote PIN");
bt_flip_addr_ptr(event_addr, &packet[2]);
btpad_queue_hci_pin_code_request_reply(event_addr, &packet[2]);
}
break;
case HCI_EVENT_DISCONNECTION_COMPLETE:
{
const uint32_t handle = READ_BT_16(packet, 3);
if (!packet[2])
{
struct apple_pad_connection* connection = btpad_find_connection_for(handle, 0);
if (connection)
{
connection->handle = 0;
apple_joypad_disconnect(connection->slot);
btpad_close_connection(connection);
}
}
else
ios_add_log_message("BTpad: Got failed 'Disconnection Complete' event (Status: %02X)", packet[2]);
}
break;
case L2CAP_EVENT_SERVICE_REGISTERED:
{
if (!packet[2])
ios_add_log_message("BTpad: Got failed 'Service Registered' event (PSM: %02X, Status: %02X)", READ_BT_16(packet, 3), packet[2]);
}
break;
}
}
else if (packet_type == L2CAP_DATA_PACKET)
{
for (int i = 0; i < MAX_PLAYERS; i ++)
{
struct apple_pad_connection* connection = &g_connections[i];
if (connection->state == BTPAD_CONNECTED && (connection->channels[0] == channel || connection->channels[1] == channel))
apple_joypad_packet(connection->slot, packet, size);
}
}
}
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