linux-stable/drivers/hid/hid-a4tech.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* HID driver for some a4tech "special" devices
*
* Copyright (c) 1999 Andreas Gal
* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
* Copyright (c) 2006-2007 Jiri Kosina
* Copyright (c) 2008 Jiri Slaby
*/
/*
*/
#include <linux/device.h>
#include <linux/input.h>
#include <linux/hid.h>
#include <linux/module.h>
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
#include <linux/slab.h>
#include "hid-ids.h"
#define A4_2WHEEL_MOUSE_HACK_7 0x01
#define A4_2WHEEL_MOUSE_HACK_B8 0x02
#define A4_WHEEL_ORIENTATION (HID_UP_GENDESK | 0x000000b8)
struct a4tech_sc {
unsigned long quirks;
unsigned int hw_wheel;
__s32 delayed_value;
};
static int a4_input_mapping(struct hid_device *hdev, struct hid_input *hi,
struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
struct a4tech_sc *a4 = hid_get_drvdata(hdev);
if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8 &&
usage->hid == A4_WHEEL_ORIENTATION) {
/*
* We do not want to have this usage mapped to anything as it's
* nonstandard and doesn't really behave like an HID report.
* It's only selecting the orientation (vertical/horizontal) of
* the previous mouse wheel report. The input_events will be
* generated once both reports are recorded in a4_event().
*/
return -1;
}
return 0;
}
static int a4_input_mapped(struct hid_device *hdev, struct hid_input *hi,
struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
struct a4tech_sc *a4 = hid_get_drvdata(hdev);
if (usage->type == EV_REL && usage->code == REL_WHEEL_HI_RES) {
set_bit(REL_HWHEEL, *bit);
set_bit(REL_HWHEEL_HI_RES, *bit);
}
if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007)
return -1;
return 0;
}
static int a4_event(struct hid_device *hdev, struct hid_field *field,
struct hid_usage *usage, __s32 value)
{
struct a4tech_sc *a4 = hid_get_drvdata(hdev);
struct input_dev *input;
if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput)
return 0;
input = field->hidinput->input;
if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) {
if (usage->type == EV_REL && usage->code == REL_WHEEL_HI_RES) {
a4->delayed_value = value;
return 1;
}
if (usage->hid == A4_WHEEL_ORIENTATION) {
input_event(input, EV_REL, value ? REL_HWHEEL :
REL_WHEEL, a4->delayed_value);
input_event(input, EV_REL, value ? REL_HWHEEL_HI_RES :
REL_WHEEL_HI_RES, a4->delayed_value * 120);
return 1;
}
}
if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) {
a4->hw_wheel = !!value;
return 1;
}
if (usage->code == REL_WHEEL_HI_RES && a4->hw_wheel) {
input_event(input, usage->type, REL_HWHEEL, value);
input_event(input, usage->type, REL_HWHEEL_HI_RES, value * 120);
return 1;
}
return 0;
}
static int a4_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
struct a4tech_sc *a4;
int ret;
a4 = devm_kzalloc(&hdev->dev, sizeof(*a4), GFP_KERNEL);
if (a4 == NULL) {
hid_err(hdev, "can't alloc device descriptor\n");
return -ENOMEM;
}
a4->quirks = id->driver_data;
hid_set_drvdata(hdev, a4);
ret = hid_parse(hdev);
if (ret) {
hid_err(hdev, "parse failed\n");
return ret;
}
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (ret) {
hid_err(hdev, "hw start failed\n");
return ret;
}
return 0;
}
static const struct hid_device_id a4_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU),
.driver_data = A4_2WHEEL_MOUSE_HACK_7 },
{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D),
.driver_data = A4_2WHEEL_MOUSE_HACK_B8 },
{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649),
.driver_data = A4_2WHEEL_MOUSE_HACK_B8 },
{ }
};
MODULE_DEVICE_TABLE(hid, a4_devices);
static struct hid_driver a4_driver = {
.name = "a4tech",
.id_table = a4_devices,
.input_mapping = a4_input_mapping,
.input_mapped = a4_input_mapped,
.event = a4_event,
.probe = a4_probe,
};
module_hid_driver(a4_driver);
MODULE_LICENSE("GPL");