On Wed, Aug 27, 2014 at 5:35 AM, Christian Gmeiner
<christian.gmeiner@xxxxxxxxx> wrote:
> This patch adds a seperate hid-penmount driver to work
> around an issue with the HID report descriptor. The
> descriptor does not contain the ContactID usage and as
> result the touchscreen is represented as normal mouse
> to the system.
>
> This driver maps the button 0 emitted by the touchscreen
> to BTN_TOUCH. This makes it possible to use touch events
> in userspace.
>
> changes from v1 to v2
> - incorporated feedback from Benjamin Tissoires
> changes from v2 to v3
> - add missing hid-core.c and hid-ids.h changes
scripts/check_patch.pl complains about DOS line ending, and I agree.
This script also complains about 2 other warnings, which should not be
much of a problem.
>
> Signed-off-by: Christian Gmeiner <christian.gmeiner@xxxxxxxxx>
> ---
> drivers/hid/Kconfig | 6 ++++++
> drivers/hid/Makefile | 1 +
> drivers/hid/hid-core.c | 1 +
> drivers/hid/hid-ids.h | 1 +
> drivers/hid/hid-penmount.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++
> 5 files changed, 60 insertions(+)
> create mode 100644 drivers/hid/hid-penmount.c
>
> diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
> index c18d5d7..0351b66 100644
> --- a/drivers/hid/Kconfig
> +++ b/drivers/hid/Kconfig
> @@ -530,6 +530,12 @@ config PANTHERLORD_FF
> Say Y here if you have a PantherLord/GreenAsia based game controller
> or adapter and want to enable force feedback support for it.
>
> +config HID_PENMOUNT
> + tristate "Penmount touch device"
> + depends on USB_HID
> + ---help---
> + Say Y here if you have a Penmount based touch controller.
> +
> config HID_PETALYNX
> tristate "Petalynx Maxter remote control"
> depends on HID
> diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
> index 4dbac7f..e2850d8 100644
> --- a/drivers/hid/Makefile
> +++ b/drivers/hid/Makefile
> @@ -71,6 +71,7 @@ obj-$(CONFIG_HID_NTRIG) += hid-ntrig.o
> obj-$(CONFIG_HID_ORTEK) += hid-ortek.o
> obj-$(CONFIG_HID_PRODIKEYS) += hid-prodikeys.o
> obj-$(CONFIG_HID_PANTHERLORD) += hid-pl.o
> +obj-$(CONFIG_HID_PENMOUNT) += hid-penmount.o
> obj-$(CONFIG_HID_PETALYNX) += hid-petalynx.o
> obj-$(CONFIG_HID_PICOLCD) += hid-picolcd.o
> hid-picolcd-y += hid-picolcd_core.o
> diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
> index 12b6e67..6827196 100644
> --- a/drivers/hid/hid-core.c
> +++ b/drivers/hid/hid-core.c
> @@ -1880,6 +1880,7 @@ static const struct hid_device_id hid_have_special_driver[] = {
> { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_18) },
> { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) },
> { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },
> + { HID_USB_DEVICE(USB_VENDOR_ID_PENMOUNT, USB_DEVICE_ID_PENMOUNT_6000) },
> { HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
> { HID_USB_DEVICE(USB_VENDOR_ID_PRIMAX, USB_DEVICE_ID_PRIMAX_KEYBOARD) },
> #if IS_ENABLED(CONFIG_HID_ROCCAT)
> diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
> index 25cd674..3943ffe 100644
> --- a/drivers/hid/hid-ids.h
> +++ b/drivers/hid/hid-ids.h
> @@ -722,6 +722,7 @@
> #define USB_DEVICE_ID_PENMOUNT_PCI 0x3500
> #define USB_DEVICE_ID_PENMOUNT_1610 0x1610
> #define USB_DEVICE_ID_PENMOUNT_1640 0x1640
> +#define USB_DEVICE_ID_PENMOUNT_6000 0x6000
>
> #define USB_VENDOR_ID_PETALYNX 0x18b1
> #define USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE 0x0037
> diff --git a/drivers/hid/hid-penmount.c b/drivers/hid/hid-penmount.c
> new file mode 100644
> index 0000000..02de4b8
> --- /dev/null
> +++ b/drivers/hid/hid-penmount.c
> @@ -0,0 +1,51 @@
> +/*
> + * HID driver for PenMount touchscreens
> + *
> + * Copyright (c) 2014 Christian Gmeiner <christian.gmeiner@xxxxxxxxx>
> + *
> + * based on hid-penmount copyrighted by
> + * PenMount Touch Solutions <penmount@xxxxxxxxxxx>
> + */
> +
> +/*
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License as published by the Free
> + * Software Foundation; either version 2 of the License, or (at your option)
> + * any later version.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/hid.h>
> +#include "hid-ids.h"
> +
> +static int penmount_input_mapping(struct hid_device *hdev,
> + struct hid_input *hi, struct hid_field *field,
> + struct hid_usage *usage, unsigned long **bit, int *max)
> +{
> + int mapped = 0;
I would have simply removed that...
> +
> + if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
> + hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
> + mapped = 1;
... "return 1;" here...
> + }
> +
> + return mapped;
... and "return 0;" here.
> +}
> +
> +static const struct hid_device_id penmount_devices[] = {
> + { HID_USB_DEVICE(USB_VENDOR_ID_PENMOUNT, USB_DEVICE_ID_PENMOUNT_6000) },
> + { }
> +};
> +MODULE_DEVICE_TABLE(hid, penmount_devices);
> +
> +static struct hid_driver penmount_driver = {
> + .name = "hid-penmount",
> + .id_table = penmount_devices,
> + .input_mapping = penmount_input_mapping,
> +};
> +
> +module_hid_driver(penmount_driver);
> +
> +MODULE_AUTHOR("Christian Gmeiner <christian.gmeiner@xxxxxxxxx>");
> +MODULE_DESCRIPTION("PenMount HID TouchScreen driver");
> +MODULE_LICENSE("GPL");
> --
> 1.9.3
>
The rest is pretty straightforward.
With the small change here + the remove of DOS line endings, the patch
is Reviewed-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
Then comes the question to know if this is _really_ necessary and if
there is no other way to achieve the same.
BTW, you should also put Jiri (the HID maintainer) in CC of your
submissions if you ever want it to get into the main tree :)
Cheers,
Benjamin
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