mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
![Tejun Heo](/assets/img/avatar_default.png)
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>
261 lines
6.3 KiB
C
261 lines
6.3 KiB
C
/*
|
|
* HID driver for Quanta Optical Touch dual-touch panels
|
|
*
|
|
* Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* 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/device.h>
|
|
#include <linux/hid.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
|
|
MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
|
|
MODULE_DESCRIPTION("Quanta dual-touch panel");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#include "hid-ids.h"
|
|
|
|
struct quanta_data {
|
|
__u16 x, y;
|
|
__u8 id;
|
|
bool valid; /* valid finger data, or just placeholder? */
|
|
bool first; /* is this the first finger in this frame? */
|
|
bool activity_now; /* at least one active finger in this frame? */
|
|
bool activity; /* at least one active finger previously? */
|
|
};
|
|
|
|
static int quanta_input_mapping(struct hid_device *hdev, struct hid_input *hi,
|
|
struct hid_field *field, struct hid_usage *usage,
|
|
unsigned long **bit, int *max)
|
|
{
|
|
switch (usage->hid & HID_USAGE_PAGE) {
|
|
|
|
case HID_UP_GENDESK:
|
|
switch (usage->hid) {
|
|
case HID_GD_X:
|
|
hid_map_usage(hi, usage, bit, max,
|
|
EV_ABS, ABS_MT_POSITION_X);
|
|
/* touchscreen emulation */
|
|
input_set_abs_params(hi->input, ABS_X,
|
|
field->logical_minimum,
|
|
field->logical_maximum, 0, 0);
|
|
return 1;
|
|
case HID_GD_Y:
|
|
hid_map_usage(hi, usage, bit, max,
|
|
EV_ABS, ABS_MT_POSITION_Y);
|
|
/* touchscreen emulation */
|
|
input_set_abs_params(hi->input, ABS_Y,
|
|
field->logical_minimum,
|
|
field->logical_maximum, 0, 0);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
|
|
case HID_UP_DIGITIZER:
|
|
switch (usage->hid) {
|
|
case HID_DG_CONFIDENCE:
|
|
case HID_DG_TIPSWITCH:
|
|
case HID_DG_INPUTMODE:
|
|
case HID_DG_DEVICEINDEX:
|
|
case HID_DG_CONTACTCOUNT:
|
|
case HID_DG_CONTACTMAX:
|
|
case HID_DG_TIPPRESSURE:
|
|
case HID_DG_WIDTH:
|
|
case HID_DG_HEIGHT:
|
|
return -1;
|
|
case HID_DG_INRANGE:
|
|
/* touchscreen emulation */
|
|
hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
|
|
return 1;
|
|
case HID_DG_CONTACTID:
|
|
hid_map_usage(hi, usage, bit, max,
|
|
EV_ABS, ABS_MT_TRACKING_ID);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
|
|
case 0xff000000:
|
|
/* ignore vendor-specific features */
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int quanta_input_mapped(struct hid_device *hdev, struct hid_input *hi,
|
|
struct hid_field *field, struct hid_usage *usage,
|
|
unsigned long **bit, int *max)
|
|
{
|
|
if (usage->type == EV_KEY || usage->type == EV_ABS)
|
|
clear_bit(usage->code, *bit);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* this function is called when a whole finger has been parsed,
|
|
* so that it can decide what to send to the input layer.
|
|
*/
|
|
static void quanta_filter_event(struct quanta_data *td, struct input_dev *input)
|
|
{
|
|
|
|
td->first = !td->first; /* touchscreen emulation */
|
|
|
|
if (!td->valid) {
|
|
/*
|
|
* touchscreen emulation: if no finger in this frame is valid
|
|
* and there previously was finger activity, this is a release
|
|
*/
|
|
if (!td->first && !td->activity_now && td->activity) {
|
|
input_event(input, EV_KEY, BTN_TOUCH, 0);
|
|
td->activity = false;
|
|
}
|
|
return;
|
|
}
|
|
|
|
input_event(input, EV_ABS, ABS_MT_TRACKING_ID, td->id);
|
|
input_event(input, EV_ABS, ABS_MT_POSITION_X, td->x);
|
|
input_event(input, EV_ABS, ABS_MT_POSITION_Y, td->y);
|
|
|
|
input_mt_sync(input);
|
|
td->valid = false;
|
|
|
|
/* touchscreen emulation: if first active finger in this frame... */
|
|
if (!td->activity_now) {
|
|
/* if there was no previous activity, emit touch event */
|
|
if (!td->activity) {
|
|
input_event(input, EV_KEY, BTN_TOUCH, 1);
|
|
td->activity = true;
|
|
}
|
|
td->activity_now = true;
|
|
/* and in any case this is our preferred finger */
|
|
input_event(input, EV_ABS, ABS_X, td->x);
|
|
input_event(input, EV_ABS, ABS_Y, td->y);
|
|
}
|
|
}
|
|
|
|
|
|
static int quanta_event(struct hid_device *hid, struct hid_field *field,
|
|
struct hid_usage *usage, __s32 value)
|
|
{
|
|
struct quanta_data *td = hid_get_drvdata(hid);
|
|
|
|
if (hid->claimed & HID_CLAIMED_INPUT) {
|
|
struct input_dev *input = field->hidinput->input;
|
|
|
|
switch (usage->hid) {
|
|
case HID_DG_INRANGE:
|
|
td->valid = !!value;
|
|
break;
|
|
case HID_GD_X:
|
|
td->x = value;
|
|
break;
|
|
case HID_GD_Y:
|
|
td->y = value;
|
|
quanta_filter_event(td, input);
|
|
break;
|
|
case HID_DG_CONTACTID:
|
|
td->id = value;
|
|
break;
|
|
case HID_DG_CONTACTCOUNT:
|
|
/* touch emulation: this is the last field in a frame */
|
|
td->first = false;
|
|
td->activity_now = false;
|
|
break;
|
|
case HID_DG_CONFIDENCE:
|
|
case HID_DG_TIPSWITCH:
|
|
/* avoid interference from generic hidinput handling */
|
|
break;
|
|
|
|
default:
|
|
/* fallback to the generic hidinput handling */
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* we have handled the hidinput part, now remains hiddev */
|
|
if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
|
|
hid->hiddev_hid_event(hid, field, usage, value);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int quanta_probe(struct hid_device *hdev, const struct hid_device_id *id)
|
|
{
|
|
int ret;
|
|
struct quanta_data *td;
|
|
|
|
td = kmalloc(sizeof(struct quanta_data), GFP_KERNEL);
|
|
if (!td) {
|
|
dev_err(&hdev->dev, "cannot allocate Quanta Touch data\n");
|
|
return -ENOMEM;
|
|
}
|
|
td->valid = false;
|
|
td->activity = false;
|
|
td->activity_now = false;
|
|
td->first = false;
|
|
hid_set_drvdata(hdev, td);
|
|
|
|
ret = hid_parse(hdev);
|
|
if (!ret)
|
|
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
|
|
|
|
if (ret)
|
|
kfree(td);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void quanta_remove(struct hid_device *hdev)
|
|
{
|
|
hid_hw_stop(hdev);
|
|
kfree(hid_get_drvdata(hdev));
|
|
hid_set_drvdata(hdev, NULL);
|
|
}
|
|
|
|
static const struct hid_device_id quanta_devices[] = {
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_QUANTA,
|
|
USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_QUANTA,
|
|
USB_DEVICE_ID_PIXART_IMAGING_INC_OPTICAL_TOUCH_SCREEN) },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(hid, quanta_devices);
|
|
|
|
static const struct hid_usage_id quanta_grabbed_usages[] = {
|
|
{ HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
|
|
{ HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
|
|
};
|
|
|
|
static struct hid_driver quanta_driver = {
|
|
.name = "quanta-touch",
|
|
.id_table = quanta_devices,
|
|
.probe = quanta_probe,
|
|
.remove = quanta_remove,
|
|
.input_mapping = quanta_input_mapping,
|
|
.input_mapped = quanta_input_mapped,
|
|
.usage_table = quanta_grabbed_usages,
|
|
.event = quanta_event,
|
|
};
|
|
|
|
static int __init quanta_init(void)
|
|
{
|
|
return hid_register_driver(&quanta_driver);
|
|
}
|
|
|
|
static void __exit quanta_exit(void)
|
|
{
|
|
hid_unregister_driver(&quanta_driver);
|
|
}
|
|
|
|
module_init(quanta_init);
|
|
module_exit(quanta_exit);
|
|
|