Enable HID Nitendo

1 files changed, 40 insertions, 0 deletions

diff --git a/0009-HID-nintendo-patch-hw-version-for-userspace-HID-mapp.patch b/0009-HID-nintendo-patch-hw-version-for-userspace-HID-mapp.patch
new file mode 100644
index 000000000000..f2f933529ca2
--- /dev/null
+++ b/0009-HID-nintendo-patch-hw-version-for-userspace-HID-mapp.patch
@@ -0,0 +1,40 @@
+From 0e1f3e627627e67cb823a37cf1c1834baa3d6f88 Mon Sep 17 00:00:00 2001
+From: "Daniel J. Ogorchock" <djogorchock@gmail.com>
+Date: Sun, 13 Oct 2019 18:06:08 -0500
+Subject: [PATCH 09/14] HID: nintendo: patch hw version for userspace HID
+ mappings
+
+This patch sets the most significant bit of the hid hw version to allow
+userspace to distinguish between this driver's input mappings vs. the
+default hid mappings. This prevents breaking userspace applications that
+use SDL2 for gamepad input, allowing them to distinguish the mappings
+based on the version.
+
+Signed-off-by: Daniel J. Ogorchock <djogorchock@gmail.com>
+---
+ drivers/hid/hid-nintendo.c | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+diff --git a/drivers/hid/hid-nintendo.c b/drivers/hid/hid-nintendo.c
+index f2864fd9fc5d..c2f7dc83d875 100644
+--- a/drivers/hid/hid-nintendo.c
++++ b/drivers/hid/hid-nintendo.c
+@@ -1423,6 +1423,15 @@ static int nintendo_hid_probe(struct hid_device *hdev,
+ 		goto err_wq;
+ 	}
+ 
++	/*
++	 * Patch the hw version of pro controller/joycons, so applications can
++	 * distinguish between the default HID mappings and the mappings defined
++	 * by the Linux game controller spec. This is important for the SDL2
++	 * library, which has a game controller database, which uses device ids
++	 * in combination with version as a key.
++	 */
++	hdev->version |= 0x8000;
++
+ 	ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
+ 	if (ret) {
+ 		hid_err(hdev, "HW start failed\n");
+-- 
+2.28.0
+