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Date: Tue, 21 Jul 2015 10:19:23 +0200 From: Oliver Neukum <oneukum@...e.com> To: Yann Cantin <yann.cantin@...oste.net> Cc: linux-input@...r.kernel.org, linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org, linux-api@...r.kernel.org, dmitry.torokhov@...il.com, jkosina@...e.cz, gregkh@...uxfoundation.org Subject: Re: [RFC ebeam PATCH 2/2] input: misc: New USB eBeam input driver On Mon, 2015-07-20 at 23:03 +0200, Yann Cantin wrote: > Signed-off-by: Yann Cantin <yann.cantin@...oste.net> > --- > Documentation/ABI/testing/sysfs-driver-ebeam | 53 ++ > drivers/input/misc/Kconfig | 22 + > drivers/input/misc/Makefile | 1 + > drivers/input/misc/ebeam.c | 777 +++++++++++++++++++++++++++ > 4 files changed, 853 insertions(+) > create mode 100644 Documentation/ABI/testing/sysfs-driver-ebeam > create mode 100644 drivers/input/misc/ebeam.c > > diff --git a/Documentation/ABI/testing/sysfs-driver-ebeam b/Documentation/ABI/testing/sysfs-driver-ebeam > new file mode 100644 > index 0000000..6873db5 > --- /dev/null > +++ b/Documentation/ABI/testing/sysfs-driver-ebeam > @@ -0,0 +1,53 @@ > +What: /sys/class/input/inputXX/device/min_x > + /sys/class/input/inputXX/device/min_y > + /sys/class/input/inputXX/device/max_x > + /sys/class/input/inputXX/device/max_y > +Date: Jul 2015 > +Kernel Version: 4.1 > +Contact: yann.cantin@...oste.net > + linux-usb@...r.kernel.org > +Description: > + Reading from these files return the actually used range values of > + the reported coordinates. > + Writing to these files preset these range values. > + See below for the calibration procedure. > + > +What: /sys/class/input/inputXX/device/h[1..9] > +Date: Jul 2015 > +Kernel Version: 4.1 > +Contact: yann.cantin@...oste.net > + linux-usb@...r.kernel.org > +Description: > + Reading from these files return the 3x3 transformation matrix elements > + actually used, in row-major. > + Writing to these files preset these elements values. > + See below for the calibration procedure. > + > +What: /sys/class/input/inputXX/device/calibrated > +Date: Jul 2015 > +Kernel Version: 4.1 > +Contact: yann.cantin@...oste.net > + linux-usb@...r.kernel.org > +Description: > + Reading from this file : > + - Return 0 if the driver is in "un-calibrated" mode : it actually send > + raw coordinates in the device's internal coordinates system. > + - Return 1 if the driver is in "calibrated" mode : it send computed coordinates > + that (hopefully) matches the screen's coordinates system. > + Writing 1 to this file enable the "calibrated" mode, 0 reset the driver in > + "un-calibrated" mode. > + > +Calibration procedure : > + > +When loaded, the driver is in "un-calibrated" mode : it send device's raw coordinates > +in the [0..65535]x[0..65535] range, the transformation matrix is the identity. > + > +A calibration program have to compute a homography transformation matrix that convert > +the device's raw coordinates to the matching screen's ones. > +It then write to the appropriate sysfs files the computed values, pre-setting the > +driver's parameters : xy range, and the matrix's elements. > +When all values are passed, it write 1 to the calibrated sysfs file to enable the "calibrated" mode. > + > +Warning : The parameters aren't used until 1 is writen to the calibrated sysfs file. > + > +Writing 0 to the calibrated sysfs file reset the driver in "un-calibrated" mode. > diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig > index d4f0a81..22c46a4 100644 > --- a/drivers/input/misc/Kconfig > +++ b/drivers/input/misc/Kconfig > @@ -103,6 +103,28 @@ config INPUT_E3X0_BUTTON > To compile this driver as a module, choose M here: the > module will be called e3x0_button. > > +config INPUT_EBEAM_USB > + tristate "USB eBeam driver" > + depends on USB_ARCH_HAS_HCD > + select USB > + help > + Say Y here if you have a USB eBeam pointing device and want to > + use it without any proprietary user space tools. > + > + Have a look at <http://ebeam.tuxfamily.org/> for > + a usage description and the required user-space tools. > + > + Supported devices : > + - Luidia eBeam Classic Projection and eBeam Edge Projection > + - Nec NP01Wi1 & NP01Wi2 interactive solution > + > + Supposed working devices, need test, may lack functionality : > + - Luidia eBeam Edge Whiteboard and eBeam Engage > + - Hitachi Starboard FX-63, FX-77, FX-82, FX-77GII > + > + To compile this driver as a module, choose M here: the > + module will be called ebeam. > + > config INPUT_PCSPKR > tristate "PC Speaker support" > depends on PCSPKR_PLATFORM > diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile > index 53df07d..125f8a9 100644 > --- a/drivers/input/misc/Makefile > +++ b/drivers/input/misc/Makefile > @@ -28,6 +28,7 @@ obj-$(CONFIG_INPUT_DA9055_ONKEY) += da9055_onkey.o > obj-$(CONFIG_INPUT_DA9063_ONKEY) += da9063_onkey.o > obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o > obj-$(CONFIG_INPUT_E3X0_BUTTON) += e3x0-button.o > +obj-$(CONFIG_INPUT_EBEAM_USB) += ebeam.o > obj-$(CONFIG_INPUT_DRV260X_HAPTICS) += drv260x.o > obj-$(CONFIG_INPUT_DRV2665_HAPTICS) += drv2665.o > obj-$(CONFIG_INPUT_DRV2667_HAPTICS) += drv2667.o > diff --git a/drivers/input/misc/ebeam.c b/drivers/input/misc/ebeam.c > new file mode 100644 > index 0000000..79cac51 > --- /dev/null > +++ b/drivers/input/misc/ebeam.c > @@ -0,0 +1,777 @@ > +/****************************************************************************** > + * > + * eBeam driver > + * > + * Copyright (C) 2012-2015 Yann Cantin (yann.cantin@...oste.net) > + * > + * 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. > + * > + * based on > + * > + * usbtouchscreen.c by Daniel Ritz <daniel.ritz@....ch> > + * aiptek.c (sysfs/settings) by Chris Atenasio <chris@...d.net> > + * Bryan W. Headley <bwheadley@...thlink.net> > + * > + *****************************************************************************/ > + > +#include <linux/kernel.h> > +#include <linux/slab.h> > +#include <linux/math64.h> > +#include <linux/input.h> > +#include <linux/module.h> > +#include <linux/init.h> > +#include <linux/usb.h> > +#include <linux/usb/input.h> > +#include <asm/unaligned.h> > + > +#define DRIVER_AUTHOR "Yann Cantin <yann.cantin@...oste.net>" > +#define DRIVER_DESC "USB eBeam Driver" > + > +/* Common values for eBeam devices */ > +#define REPT_SIZE 8 /* packet size */ > +#define MIN_RAW_X 0 /* raw coordinates ranges */ > +#define MAX_RAW_X 0xFFFF > +#define MIN_RAW_Y 0 > +#define MAX_RAW_Y 0xFFFF > + > +/* Electronics For Imaging, Inc */ > +#define USB_VENDOR_ID_EFI 0x2650 You are defining these IDs twice. That is not good. Regards Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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