linux-kernel - Re: [PATCH v2] HID: sony: support for ghlive ps3/wii u dongles

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Message-ID: <nycvar.YFH.7.76.2011251423130.3441@cbobk.fhfr.pm>
Date:   Wed, 25 Nov 2020 14:24:40 +0100 (CET)
From:   Jiri Kosina <jikos@...nel.org>
To:     Pascal Giard <pascal.giard@...mtl.ca>
cc:     Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sanjay Govind <sanjay.govind9@...il.com>
Subject: Re: [PATCH v2] HID: sony: support for ghlive ps3/wii u dongles

On Sat, 7 Nov 2020, Pascal Giard wrote:

> This commit adds support for the Guitar Hero Live PS3 and Wii U dongles.
> 
> These dongles require a "magic" USB control message [1] to be sent
> approximately every 10 seconds otherwise the dongle will not report
> events where the strumbar is hit while a fret is being held.
> 
> Also, inspired by a patch sent on linux-input by Sanjay Govind [2], the
> accelerometer is mapped to ABS_RY for tilt.
> 
> Interestingly, the Wii U and PS3 dongles share the same VID and PID.
> 
> [1] https://github.com/ghlre/GHLtarUtility/
> [2] https://marc.info/?l=linux-input&m=157242835928542&w=2
> 
> Signed-off-by: Pascal Giard <pascal.giard@...mtl.ca>
> ---
> differences from v1:
> * Patches hid-sony instead of creating a new driver
> * Changed memory allocation scheme in case of fail
> ---
>  drivers/hid/Kconfig    |   1 +
>  drivers/hid/hid-ids.h  |   3 ++
>  drivers/hid/hid-sony.c | 115 +++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 119 insertions(+)
> 
> diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
> index 34f07371716d..e2df2ae112a5 100644
> --- a/drivers/hid/Kconfig
> +++ b/drivers/hid/Kconfig
> @@ -897,6 +897,7 @@ config HID_SONY
>  	  * Buzz controllers
>  	  * Sony PS3 Blue-ray Disk Remote Control (Bluetooth)
>  	  * Logitech Harmony adapter for Sony Playstation 3 (Bluetooth)
> +	  * Guitar Hero Live PS3 and Wii U guitar dongles
>  
>  config SONY_FF
>  	bool "Sony PS2/3/4 accessories force feedback support" 
> diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
> index 1c71a1aa76b2..e3a3942079cf 100644
> --- a/drivers/hid/hid-ids.h
> +++ b/drivers/hid/hid-ids.h
> @@ -1060,6 +1060,9 @@
>  #define USB_DEVICE_ID_SONY_BUZZ_CONTROLLER		0x0002
>  #define USB_DEVICE_ID_SONY_WIRELESS_BUZZ_CONTROLLER	0x1000
>  
> +#define USB_VENDOR_ID_SONY_GHLIVE			0x12ba
> +#define USB_DEVICE_ID_SONY_PS3WIIU_GHLIVE_DONGLE	0x074b
> +
>  #define USB_VENDOR_ID_SINO_LITE			0x1345
>  #define USB_DEVICE_ID_SINO_LITE_CONTROLLER	0x3008
>  
> diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
> index 4c6ed6ef31f1..700bea6239f6 100644
> --- a/drivers/hid/hid-sony.c
> +++ b/drivers/hid/hid-sony.c
> @@ -11,6 +11,7 @@
>   *  Copyright (c) 2013 Colin Leitner <colin.leitner@...il.com>
>   *  Copyright (c) 2014-2016 Frank Praznik <frank.praznik@...il.com>
>   *  Copyright (c) 2018 Todd Kelner
> + *  Copyright (c) 2020 Pascal Giard <pascal.giard@...mtl.ca>
>   */
>  
>  /*
> @@ -35,6 +36,8 @@
>  #include <linux/idr.h>
>  #include <linux/input/mt.h>
>  #include <linux/crc32.h>
> +#include <linux/usb.h>
> +#include <linux/timer.h>
>  #include <asm/unaligned.h>
>  
>  #include "hid-ids.h"
> @@ -56,6 +59,8 @@
>  #define NSG_MR5U_REMOTE_BT        BIT(14)
>  #define NSG_MR7U_REMOTE_BT        BIT(15)
>  #define SHANWAN_GAMEPAD           BIT(16)
> +#define GHL_GUITAR_PS3WIIU        BIT(17)
> +#define GHL_GUITAR_CONTROLLER     BIT(18)

Hi Pascal,

thanks for fixing the previous version. This one looks good to me, I just 
have one remaining question -- why do we need both quirks here? Given the 
particular VID/PID gets both of them set anyway (and only that VID/PID), 
and the code is shared, what is the point of consuming the extra bit?

Thanks,

-- 
Jiri Kosina
SUSE Labs