linux-kernel - Re: [Patch] hid: enhance hid-saitek for use with R.A.T.5 and similar

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Date:	Tue, 26 Jan 2016 15:29:38 +0100 (CET)
From:	Jiri Kosina <jikos@...nel.org>
To:	Piotr Sawuk <a9702387@...t.univie.ac.at>
cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [Patch] hid: enhance hid-saitek for use with R.A.T.5 and
 similar

On Sat, 9 Jan 2016, Piotr Sawuk wrote:

> added support for my pid so I can test the changes:
> 3 events were mapped to one, this allows discerning which is which.
> on my mouse there is a button with a 3 colour-led.
> I can now determine in user-space which colour is visible.
> this patch replaces my previous one which merely added rat5-support.
> 
> Signed-off-by: Piotr Sawuk <piotr5@...rs.sf.net>

The patch has been damaged by your mail client, and as such can't be 
applied. Could you please fix that up and resend?

> ---
> add support for mad catz r.a.t.5
> add a file in sysfs called "mode" exposing the integer of that name.
> 
> diff -rup linux-4.2.6-gentoo/drivers/hid/hid-core.c
> linux-4.2.6-gentoo-rat5/drivers/hid/hid-core.c
> --- linux-4.2.6-gentoo/drivers/hid/hid-core.c	2015-08-30
> 20:34:09.000000000 +0200
> +++ linux-4.2.6-gentoo-rat5/drivers/hid/hid-core.c	2015-12-30
> 12:09:14.340841552 +0100
> @@ -1959,6 +1959,7 @@ static const struct hid_device_id hid_ha
>  	{ HID_USB_DEVICE(USB_VENDOR_ID_SAITEK, USB_DEVICE_ID_SAITEK_RAT7) },
>  	{ HID_USB_DEVICE(USB_VENDOR_ID_SAITEK, USB_DEVICE_ID_SAITEK_MMO7) },
>  	{ HID_USB_DEVICE(USB_VENDOR_ID_MADCATZ, USB_DEVICE_ID_MADCATZ_RAT9) },
> +	{ HID_USB_DEVICE(USB_VENDOR_ID_MADCATZ, USB_DEVICE_ID_MADCATZ_RAT5) },

Could you please keep the list sorted (at least by parts)?

>  #endif
>  	{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG,
> USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
>  	{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG,
> USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE) },
> diff -rup linux-4.2.6-gentoo/drivers/hid/hid-ids.h
> linux-4.2.6-gentoo-rat5/drivers/hid/hid-ids.h
> --- linux-4.2.6-gentoo/drivers/hid/hid-ids.h	2015-08-30
> 20:34:09.000000000 +0200
> +++ linux-4.2.6-gentoo-rat5/drivers/hid/hid-ids.h	2015-12-29
> 18:47:36.756225217 +0100
> @@ -634,6 +634,7 @@
> 
>  #define USB_VENDOR_ID_MADCATZ		0x0738
>  #define USB_DEVICE_ID_MADCATZ_BEATPAD	0x4540
> +#define USB_DEVICE_ID_MADCATZ_RAT5	0x1705
>  #define USB_DEVICE_ID_MADCATZ_RAT9	0x1709
> 
>  #define USB_VENDOR_ID_MCC		0x09db
> diff -rup linux-4.2.6-gentoo/drivers/hid/hid-saitek.c
> linux-4.2.6-gentoo-rat5/drivers/hid/hid-saitek.c
> --- linux-4.2.6-gentoo/drivers/hid/hid-saitek.c	2015-08-30
> 20:34:09.000000000 +0200
> +++ linux-4.2.6-gentoo-rat5/drivers/hid/hid-saitek.c	2016-01-09
> 12:19:19.574905612 +0100
> @@ -7,10 +7,11 @@
>   *  (This module is based on "hid-ortek".)
>   *  Copyright (c) 2012 Andreas Hübner
>   *
> - *  R.A.T.7, R.A.T.9, M.M.O.7 (USB gaming mice):
> + *  R.A.T.5, R.A.T.7, R.A.T.9, M.M.O.7 (USB gaming mice):
>   *  Fixes the mode button which cycles through three constantly pressed
>   *  buttons. All three press events are mapped to one button and the
>   *  missing release event is generated immediately.
> + *  Original press event is available in "mode" file on sysfs.
>   *
>   */
> 
> @@ -37,6 +38,40 @@ struct saitek_sc {
>  	int mode;
>  };
> 
> +static ssize_t show_mode(struct device *dev,
> +		struct device_attribute *attr,
> +		char *mode_buf);
> +
> +/* world-readable since errors are caught and no usb-interaction needed. */
> +DEVICE_ATTR(mode, 0444, show_mode, NULL);
> +
> +static ssize_t show_mode(struct device *dev,
> +		struct device_attribute *attr,
> +		char *mode_buf)
> +{
> +	struct saitek_sc *ssc;
> +	struct hid_device *hdev;
> +
> +	/* error-messages in sysfs file since it's non-critical. */
> +	if (dev == NULL) {
> +		return snprintf(mode_buf, PAGE_SIZE, "No parent.\n");
> +	}
> +
> +	hdev = container_of(dev, struct hid_device, dev);

You can use to_hid_device() here.

Thanks,

-- 
Jiri Kosina
SUSE Labs