From 5718ba253fac35fb0122b62a6435c8cf070034cc Mon Sep 17 00:00:00 2001
From: Max Maisel <[EMAIL REDACTED]>
Date: Thu, 7 Sep 2023 17:12:33 +0200
Subject: [PATCH] Implement steam deck HIDAPI initialization.
---
src/joystick/hidapi/SDL_hidapi_steamdeck.c | 45 +++++++++++++++++++++-
1 file changed, 43 insertions(+), 2 deletions(-)
diff --git a/src/joystick/hidapi/SDL_hidapi_steamdeck.c b/src/joystick/hidapi/SDL_hidapi_steamdeck.c
index 93a38de8ed83..95e8d426140b 100644
--- a/src/joystick/hidapi/SDL_hidapi_steamdeck.c
+++ b/src/joystick/hidapi/SDL_hidapi_steamdeck.c
@@ -32,6 +32,11 @@
#include <stdint.h>
+typedef struct
+{
+ Uint32 update_rate_us;
+} SDL_DriverSteamDeck_Context;
+
/*****************************************************************************************************/
static void HIDAPI_DriverSteamDeck_RegisterHints(SDL_HintCallback callback, void *userdata)
@@ -67,7 +72,31 @@ static SDL_bool HIDAPI_DriverSteamDeck_IsSupportedDevice(
static SDL_bool HIDAPI_DriverSteamDeck_InitDevice(SDL_HIDAPI_Device *device)
{
- return SDL_FALSE;
+ int size;
+ Uint8 data[64];
+ SDL_DriverSteamDeck_Context *ctx;
+
+ ctx = (SDL_DriverSteamDeck_Context *)SDL_calloc(1, sizeof(*ctx));
+ if (ctx == NULL) {
+ SDL_OutOfMemory();
+ return SDL_FALSE;
+ }
+
+ // Always 1kHz according to USB descriptor
+ ctx->update_rate_us = 1000;
+
+ device->context = ctx;
+
+ // Read a report to see if this is the correct endpoint.
+ // Mouse, Keyboard and Controller have the same VID/PID but
+ // only the controller hidraw device receives hid reports.
+ size = SDL_hid_read_timeout(device->dev, data, sizeof(data), 16);
+ if (size == 0)
+ return SDL_FALSE;
+
+ HIDAPI_SetDeviceName(device, "Steam Deck");
+
+ return HIDAPI_JoystickConnected(device, NULL);
}
static int HIDAPI_DriverSteamDeck_GetDevicePlayerIndex(SDL_HIDAPI_Device *device, SDL_JoystickID instance_id)
@@ -86,7 +115,19 @@ static SDL_bool HIDAPI_DriverSteamDeck_UpdateDevice(SDL_HIDAPI_Device *device)
static SDL_bool HIDAPI_DriverSteamDeck_OpenJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick)
{
- return SDL_FALSE;
+ SDL_DriverSteamDeck_Context *ctx = (SDL_DriverSteamDeck_Context *)device->context;
+ float update_rate_in_hz = 1.0f / (float)(ctx->update_rate_us) * 1.0e6f;
+
+ SDL_AssertJoysticksLocked();
+
+ // Initialize the joystick capabilities
+ joystick->nbuttons = 20;
+ joystick->naxes = SDL_CONTROLLER_AXIS_MAX;
+
+ SDL_PrivateJoystickAddSensor(joystick, SDL_SENSOR_GYRO, update_rate_in_hz);
+ SDL_PrivateJoystickAddSensor(joystick, SDL_SENSOR_ACCEL, update_rate_in_hz);
+
+ return SDL_TRUE;
}
static int HIDAPI_DriverSteamDeck_RumbleJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble)