2008-11-19 14:54:46 +00:00
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/*
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2009-05-20 13:49:35 +00:00
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* HID driver for N-Trig touchscreens
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2008-11-19 14:54:46 +00:00
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*
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2010-04-06 20:22:58 +00:00
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* Copyright (c) 2008-2010 Rafi Rubin
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* Copyright (c) 2009-2010 Stephane Chatty
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2008-11-19 14:54:46 +00:00
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*
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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2010-04-06 20:22:58 +00:00
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#include <linux/usb.h>
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#include "usbhid/usbhid.h"
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2008-11-19 14:54:46 +00:00
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#include <linux/module.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
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#include <linux/slab.h>
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2008-11-19 14:54:46 +00:00
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#include "hid-ids.h"
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#define NTRIG_DUPLICATE_USAGES 0x001
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2009-05-20 13:49:35 +00:00
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struct ntrig_data {
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2010-02-13 02:13:05 +00:00
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/* Incoming raw values for a single contact */
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__u16 x, y, w, h;
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__u16 id;
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2010-05-03 09:08:29 +00:00
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bool tipswitch;
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bool confidence;
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bool first_contact_touch;
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2010-02-13 02:13:05 +00:00
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bool reading_mt;
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__u8 mt_footer[4];
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__u8 mt_foot_count;
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2009-05-20 13:49:35 +00:00
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};
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/*
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* this driver is aimed at two firmware versions in circulation:
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* - dual pen/finger single touch
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* - finger multitouch, pen not working
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*/
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2008-11-19 14:54:46 +00:00
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static int ntrig_input_mapping(struct hid_device *hdev, struct hid_input *hi,
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struct hid_field *field, struct hid_usage *usage,
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unsigned long **bit, int *max)
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{
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2010-02-13 02:13:05 +00:00
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/* No special mappings needed for the pen and single touch */
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if (field->physical)
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2010-02-12 03:14:05 +00:00
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return 0;
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2009-05-20 13:49:35 +00:00
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switch (usage->hid & HID_USAGE_PAGE) {
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case HID_UP_GENDESK:
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switch (usage->hid) {
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case HID_GD_X:
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hid_map_usage(hi, usage, bit, max,
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EV_ABS, ABS_MT_POSITION_X);
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input_set_abs_params(hi->input, ABS_X,
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field->logical_minimum,
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field->logical_maximum, 0, 0);
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return 1;
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case HID_GD_Y:
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hid_map_usage(hi, usage, bit, max,
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EV_ABS, ABS_MT_POSITION_Y);
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input_set_abs_params(hi->input, ABS_Y,
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field->logical_minimum,
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field->logical_maximum, 0, 0);
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return 1;
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}
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return 0;
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case HID_UP_DIGITIZER:
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switch (usage->hid) {
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/* we do not want to map these for now */
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2010-02-13 02:13:05 +00:00
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case HID_DG_CONTACTID: /* Not trustworthy, squelch for now */
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2009-05-20 13:49:35 +00:00
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case HID_DG_INPUTMODE:
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case HID_DG_DEVICEINDEX:
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case HID_DG_CONTACTMAX:
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return -1;
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/* width/height mapped on TouchMajor/TouchMinor/Orientation */
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case HID_DG_WIDTH:
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hid_map_usage(hi, usage, bit, max,
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EV_ABS, ABS_MT_TOUCH_MAJOR);
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return 1;
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case HID_DG_HEIGHT:
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hid_map_usage(hi, usage, bit, max,
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EV_ABS, ABS_MT_TOUCH_MINOR);
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input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
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0, 1, 0, 0);
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return 1;
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}
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return 0;
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case 0xff000000:
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/* we do not want to map these: no input-oriented meaning */
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return -1;
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2008-11-19 14:54:46 +00:00
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}
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2009-05-20 13:49:35 +00:00
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2008-11-19 14:54:46 +00:00
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return 0;
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}
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static int ntrig_input_mapped(struct hid_device *hdev, struct hid_input *hi,
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struct hid_field *field, struct hid_usage *usage,
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unsigned long **bit, int *max)
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{
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2010-02-13 02:13:05 +00:00
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/* No special mappings needed for the pen and single touch */
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if (field->physical)
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2010-02-12 03:14:05 +00:00
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return 0;
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2010-02-12 03:14:06 +00:00
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2008-11-19 14:54:46 +00:00
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if (usage->type == EV_KEY || usage->type == EV_REL
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|| usage->type == EV_ABS)
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clear_bit(usage->code, *bit);
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return 0;
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}
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2009-05-20 13:49:35 +00:00
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/*
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* this function is called upon all reports
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* so that we can filter contact point information,
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* decide whether we are in multi or single touch mode
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* and call input_mt_sync after each point if necessary
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*/
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static int ntrig_event (struct hid_device *hid, struct hid_field *field,
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struct hid_usage *usage, __s32 value)
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{
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struct input_dev *input = field->hidinput->input;
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struct ntrig_data *nd = hid_get_drvdata(hid);
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2010-02-12 03:14:05 +00:00
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/* No special handling needed for the pen */
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if (field->application == HID_DG_PEN)
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return 0;
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2009-05-20 13:49:35 +00:00
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if (hid->claimed & HID_CLAIMED_INPUT) {
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switch (usage->hid) {
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2010-02-13 02:13:05 +00:00
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case 0xff000001:
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/* Tag indicating the start of a multitouch group */
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nd->reading_mt = 1;
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2010-05-03 09:08:29 +00:00
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nd->first_contact_touch = 0;
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2010-02-13 02:13:05 +00:00
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break;
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2010-03-10 15:10:28 +00:00
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case HID_DG_TIPSWITCH:
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2010-05-03 09:08:29 +00:00
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nd->tipswitch = value;
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2010-03-10 15:10:28 +00:00
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/* Prevent emission of touch until validated */
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return 1;
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2010-02-13 02:13:05 +00:00
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case HID_DG_CONFIDENCE:
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nd->confidence = value;
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break;
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2009-05-20 13:49:35 +00:00
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case HID_GD_X:
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nd->x = value;
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2010-02-13 02:13:05 +00:00
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/* Clear the contact footer */
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nd->mt_foot_count = 0;
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2009-05-20 13:49:35 +00:00
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break;
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case HID_GD_Y:
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nd->y = value;
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break;
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case HID_DG_CONTACTID:
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nd->id = value;
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break;
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case HID_DG_WIDTH:
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nd->w = value;
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break;
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case HID_DG_HEIGHT:
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nd->h = value;
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/*
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* when in single touch mode, this is the last
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* report received in a finger event. We want
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* to emit a normal (X, Y) position
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*/
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2010-02-13 02:13:05 +00:00
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if (!nd->reading_mt) {
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2010-05-03 09:08:29 +00:00
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/*
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* TipSwitch indicates the presence of a
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* finger in single touch mode.
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*/
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2010-04-09 21:58:25 +00:00
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input_report_key(input, BTN_TOUCH,
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2010-05-03 09:08:29 +00:00
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nd->tipswitch);
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input_report_key(input, BTN_TOOL_DOUBLETAP,
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nd->tipswitch);
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2009-05-20 13:49:35 +00:00
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input_event(input, EV_ABS, ABS_X, nd->x);
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input_event(input, EV_ABS, ABS_Y, nd->y);
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}
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break;
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case 0xff000002:
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/*
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* we receive this when the device is in multitouch
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* mode. The first of the three values tagged with
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* this usage tells if the contact point is real
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* or a placeholder
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*/
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2010-02-13 02:13:05 +00:00
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/* Shouldn't get more than 4 footer packets, so skip */
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if (nd->mt_foot_count >= 4)
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break;
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nd->mt_footer[nd->mt_foot_count++] = value;
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/* if the footer isn't complete break */
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if (nd->mt_foot_count != 4)
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break;
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/* Pen activity signal, trigger end of touch. */
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if (nd->mt_footer[2]) {
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nd->confidence = 0;
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2009-05-20 13:49:35 +00:00
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break;
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2010-02-13 02:13:05 +00:00
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}
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/* If the contact was invalid */
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if (!(nd->confidence && nd->mt_footer[0])
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|| nd->w <= 250
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|| nd->h <= 190) {
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nd->confidence = 0;
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break;
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}
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2009-05-20 13:49:35 +00:00
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/* emit a normal (X, Y) for the first point only */
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if (nd->id == 0) {
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2010-05-03 09:08:29 +00:00
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/*
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* TipSwitch is superfluous in multitouch
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* mode. The footer events tell us
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* if there is a finger on the screen or
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* not.
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*/
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nd->first_contact_touch = nd->confidence;
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2009-05-20 13:49:35 +00:00
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input_event(input, EV_ABS, ABS_X, nd->x);
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input_event(input, EV_ABS, ABS_Y, nd->y);
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}
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input_event(input, EV_ABS, ABS_MT_POSITION_X, nd->x);
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input_event(input, EV_ABS, ABS_MT_POSITION_Y, nd->y);
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if (nd->w > nd->h) {
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input_event(input, EV_ABS,
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ABS_MT_ORIENTATION, 1);
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input_event(input, EV_ABS,
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ABS_MT_TOUCH_MAJOR, nd->w);
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input_event(input, EV_ABS,
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ABS_MT_TOUCH_MINOR, nd->h);
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} else {
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input_event(input, EV_ABS,
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ABS_MT_ORIENTATION, 0);
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input_event(input, EV_ABS,
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ABS_MT_TOUCH_MAJOR, nd->h);
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input_event(input, EV_ABS,
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ABS_MT_TOUCH_MINOR, nd->w);
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}
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input_mt_sync(field->hidinput->input);
|
2010-02-13 02:13:05 +00:00
|
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break;
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case HID_DG_CONTACTCOUNT: /* End of a multitouch group */
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if (!nd->reading_mt)
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break;
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nd->reading_mt = 0;
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|
2010-05-03 09:08:29 +00:00
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if (nd->first_contact_touch) {
|
2010-05-03 09:08:30 +00:00
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input_report_key(input, BTN_TOOL_DOUBLETAP, 1);
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2010-02-13 02:13:05 +00:00
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input_report_key(input, BTN_TOUCH, 1);
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} else {
|
2010-05-03 09:08:30 +00:00
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input_report_key(input, BTN_TOOL_DOUBLETAP, 0);
|
2010-03-10 15:10:28 +00:00
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input_report_key(input, BTN_TOUCH, 0);
|
2010-02-13 02:13:05 +00:00
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}
|
2009-05-20 13:49:35 +00:00
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break;
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default:
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|
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/* fallback to the generic hidinput handling */
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|
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return 0;
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}
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}
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/* we have handled the hidinput part, now remains hiddev */
|
2010-02-12 03:14:05 +00:00
|
|
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if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_hid_event)
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hid->hiddev_hid_event(hid, field, usage, value);
|
2009-05-20 13:49:35 +00:00
|
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return 1;
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}
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|
|
static int ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id)
|
|
|
|
{
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|
|
int ret;
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|
|
struct ntrig_data *nd;
|
2010-02-12 03:14:05 +00:00
|
|
|
struct hid_input *hidinput;
|
|
|
|
struct input_dev *input;
|
2010-04-06 20:22:58 +00:00
|
|
|
struct hid_report *report;
|
2010-02-12 03:14:05 +00:00
|
|
|
|
|
|
|
if (id->driver_data)
|
|
|
|
hdev->quirks |= HID_QUIRK_MULTI_INPUT;
|
2009-05-20 13:49:35 +00:00
|
|
|
|
|
|
|
nd = kmalloc(sizeof(struct ntrig_data), GFP_KERNEL);
|
|
|
|
if (!nd) {
|
|
|
|
dev_err(&hdev->dev, "cannot allocate N-Trig data\n");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
2010-02-13 02:13:05 +00:00
|
|
|
|
|
|
|
nd->reading_mt = 0;
|
2009-05-20 13:49:35 +00:00
|
|
|
hid_set_drvdata(hdev, nd);
|
|
|
|
|
|
|
|
ret = hid_parse(hdev);
|
2010-02-12 03:14:05 +00:00
|
|
|
if (ret) {
|
|
|
|
dev_err(&hdev->dev, "parse failed\n");
|
|
|
|
goto err_free;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
|
|
|
|
if (ret) {
|
|
|
|
dev_err(&hdev->dev, "hw start failed\n");
|
|
|
|
goto err_free;
|
|
|
|
}
|
2009-05-20 13:49:35 +00:00
|
|
|
|
2009-06-23 18:09:26 +00:00
|
|
|
|
2010-02-12 03:14:05 +00:00
|
|
|
list_for_each_entry(hidinput, &hdev->inputs, list) {
|
2010-03-10 15:10:28 +00:00
|
|
|
if (hidinput->report->maxfield < 1)
|
|
|
|
continue;
|
|
|
|
|
2010-02-12 03:14:05 +00:00
|
|
|
input = hidinput->input;
|
|
|
|
switch (hidinput->report->field[0]->application) {
|
|
|
|
case HID_DG_PEN:
|
|
|
|
input->name = "N-Trig Pen";
|
|
|
|
break;
|
|
|
|
case HID_DG_TOUCHSCREEN:
|
2010-03-10 15:10:28 +00:00
|
|
|
/* These keys are redundant for fingers, clear them
|
|
|
|
* to prevent incorrect identification */
|
2010-02-13 02:13:05 +00:00
|
|
|
__clear_bit(BTN_TOOL_PEN, input->keybit);
|
2010-03-10 15:10:28 +00:00
|
|
|
__clear_bit(BTN_TOOL_FINGER, input->keybit);
|
|
|
|
__clear_bit(BTN_0, input->keybit);
|
2010-02-13 02:13:05 +00:00
|
|
|
__set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
|
2010-02-12 03:14:05 +00:00
|
|
|
/*
|
|
|
|
* The physical touchscreen (single touch)
|
|
|
|
* input has a value for physical, whereas
|
|
|
|
* the multitouch only has logical input
|
|
|
|
* fields.
|
|
|
|
*/
|
|
|
|
input->name =
|
|
|
|
(hidinput->report->field[0]
|
|
|
|
->physical) ?
|
|
|
|
"N-Trig Touchscreen" :
|
|
|
|
"N-Trig MultiTouch";
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-04-07 10:10:29 +00:00
|
|
|
/* This is needed for devices with more recent firmware versions */
|
|
|
|
report = hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[0x0a];
|
2010-04-06 20:22:58 +00:00
|
|
|
if (report)
|
|
|
|
usbhid_submit_report(hdev, report, USB_DIR_OUT);
|
|
|
|
|
|
|
|
|
2010-02-12 03:14:05 +00:00
|
|
|
return 0;
|
|
|
|
err_free:
|
|
|
|
kfree(nd);
|
2009-05-20 13:49:35 +00:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void ntrig_remove(struct hid_device *hdev)
|
|
|
|
{
|
|
|
|
hid_hw_stop(hdev);
|
|
|
|
kfree(hid_get_drvdata(hdev));
|
|
|
|
}
|
|
|
|
|
2008-11-19 14:54:46 +00:00
|
|
|
static const struct hid_device_id ntrig_devices[] = {
|
|
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN),
|
|
|
|
.driver_data = NTRIG_DUPLICATE_USAGES },
|
|
|
|
{ }
|
|
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(hid, ntrig_devices);
|
|
|
|
|
2009-05-20 13:49:35 +00:00
|
|
|
static const struct hid_usage_id ntrig_grabbed_usages[] = {
|
|
|
|
{ HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
|
2010-02-12 03:14:05 +00:00
|
|
|
{ HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1 }
|
2009-05-20 13:49:35 +00:00
|
|
|
};
|
|
|
|
|
2008-11-19 14:54:46 +00:00
|
|
|
static struct hid_driver ntrig_driver = {
|
|
|
|
.name = "ntrig",
|
|
|
|
.id_table = ntrig_devices,
|
2009-05-20 13:49:35 +00:00
|
|
|
.probe = ntrig_probe,
|
|
|
|
.remove = ntrig_remove,
|
2008-11-19 14:54:46 +00:00
|
|
|
.input_mapping = ntrig_input_mapping,
|
|
|
|
.input_mapped = ntrig_input_mapped,
|
2009-05-20 13:49:35 +00:00
|
|
|
.usage_table = ntrig_grabbed_usages,
|
|
|
|
.event = ntrig_event,
|
2008-11-19 14:54:46 +00:00
|
|
|
};
|
|
|
|
|
2009-07-02 17:08:38 +00:00
|
|
|
static int __init ntrig_init(void)
|
2008-11-19 14:54:46 +00:00
|
|
|
{
|
|
|
|
return hid_register_driver(&ntrig_driver);
|
|
|
|
}
|
|
|
|
|
2009-07-02 17:08:38 +00:00
|
|
|
static void __exit ntrig_exit(void)
|
2008-11-19 14:54:46 +00:00
|
|
|
{
|
|
|
|
hid_unregister_driver(&ntrig_driver);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(ntrig_init);
|
|
|
|
module_exit(ntrig_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|