steamdeck-keyb/notes.md

https://steamdecklinux.wiki/wiki/Main_Page

https://patchwork.kernel.org/project/linux-input/patch/20180416122703.22306-2-rodrigorivascosta@gmail.com/

https://github.com/torvalds/linux/blob/master/drivers/hid/hid-steam.c

look at steam_raw_event

https://github.com/rodrigorc/inputmap.git

** https://github.com/rodrigorc/inputmap/blob/master/STEAM.md !!!!!!!!!!!!!!!!! **

(root@steamdeck /)# cat usr/lib/udev/rules.d/70-steam-jupiter-input.rules 
# USB devices
SUBSYSTEM=="usb", TAG+="uaccess"

# HID devices over hidraw
KERNEL=="hidraw*", TAG+="uaccess"

# Steam Controller udev write access
KERNEL=="uinput", SUBSYSTEM=="misc", TAG+="uaccess", OPTIONS+="static_node=uinput"
(root@steamdeck /)# 

--

steamdeck in steamctrl on  master [?] via C v11.3.0-gcc via ❄️  impure (shell) 
❯ sudo src/steamctrl --device /dev/hidraw3 get_serial
FWAA207022

the report descriptor run through https://eleccelerator.com/usbdescreqparser/
0x06, 0xFF, 0xFF,  // Usage Page (Vendor Defined 0xFFFF)
0x09, 0x01,        // Usage (0x01)
0xA1, 0x01,        // Collection (Application)
0x15, 0x00,        //   Logical Minimum (0)
0x26, 0xFF, 0x00,  //   Logical Maximum (255)
0x75, 0x08,        //   Report Size (8)
0x95, 0x40,        //   Report Count (64)
0x09, 0x01,        //   Usage (0x01)
0x81, 0x02,        //   Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x09, 0x01,        //   Usage (0x01)
0x91, 0x02,        //   Output (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0x09, 0x01,        //   Usage (0x01)
0xB1, 0x02,        //   Feature (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0xC0,              // End Collection

// 29 bytes