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![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>
233 lines
5.9 KiB
C
233 lines
5.9 KiB
C
/*
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* Force feedback support for PantherLord/GreenAsia based devices
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*
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* The devices are distributed under various names and the same USB device ID
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* can be used in both adapters and actual game controllers.
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*
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* 0810:0001 "Twin USB Joystick"
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* - tested with PantherLord USB/PS2 2in1 Adapter
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* - contains two reports, one for each port (HID_QUIRK_MULTI_INPUT)
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*
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* 0e8f:0003 "GreenAsia Inc. USB Joystick "
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* - tested with König Gaming gamepad
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*
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* 0e8f:0003 "GASIA USB Gamepad"
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* - another version of the König gamepad
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*
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* Copyright (c) 2007, 2009 Anssi Hannula <anssi.hannula@gmail.com>
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* #define DEBUG */
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#define debug(format, arg...) pr_debug("hid-plff: " format "\n" , ## arg)
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#include <linux/input.h>
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#include <linux/slab.h>
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#include <linux/usb.h>
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#include <linux/hid.h>
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#include "hid-ids.h"
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#ifdef CONFIG_PANTHERLORD_FF
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#include "usbhid/usbhid.h"
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struct plff_device {
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struct hid_report *report;
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s32 *strong;
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s32 *weak;
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};
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static int hid_plff_play(struct input_dev *dev, void *data,
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struct ff_effect *effect)
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{
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struct hid_device *hid = input_get_drvdata(dev);
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struct plff_device *plff = data;
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int left, right;
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left = effect->u.rumble.strong_magnitude;
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right = effect->u.rumble.weak_magnitude;
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debug("called with 0x%04x 0x%04x", left, right);
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left = left * 0x7f / 0xffff;
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right = right * 0x7f / 0xffff;
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*plff->strong = left;
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*plff->weak = right;
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debug("running with 0x%02x 0x%02x", left, right);
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usbhid_submit_report(hid, plff->report, USB_DIR_OUT);
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return 0;
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}
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static int plff_init(struct hid_device *hid)
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{
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struct plff_device *plff;
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struct hid_report *report;
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struct hid_input *hidinput;
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struct list_head *report_list =
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&hid->report_enum[HID_OUTPUT_REPORT].report_list;
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struct list_head *report_ptr = report_list;
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struct input_dev *dev;
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int error;
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s32 *strong;
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s32 *weak;
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/* The device contains one output report per physical device, all
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containing 1 field, which contains 4 ff00.0002 usages and 4 16bit
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absolute values.
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The input reports also contain a field which contains
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8 ff00.0001 usages and 8 boolean values. Their meaning is
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currently unknown.
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A version of the 0e8f:0003 exists that has all the values in
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separate fields and misses the extra input field, thus resembling
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Zeroplus (hid-zpff) devices.
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*/
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if (list_empty(report_list)) {
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dev_err(&hid->dev, "no output reports found\n");
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return -ENODEV;
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}
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list_for_each_entry(hidinput, &hid->inputs, list) {
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report_ptr = report_ptr->next;
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if (report_ptr == report_list) {
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dev_err(&hid->dev, "required output report is "
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"missing\n");
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return -ENODEV;
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}
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report = list_entry(report_ptr, struct hid_report, list);
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if (report->maxfield < 1) {
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dev_err(&hid->dev, "no fields in the report\n");
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return -ENODEV;
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}
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if (report->field[0]->report_count >= 4) {
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report->field[0]->value[0] = 0x00;
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report->field[0]->value[1] = 0x00;
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strong = &report->field[0]->value[2];
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weak = &report->field[0]->value[3];
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debug("detected single-field device");
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} else if (report->maxfield >= 4 && report->field[0]->maxusage == 1 &&
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report->field[0]->usage[0].hid == (HID_UP_LED | 0x43)) {
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report->field[0]->value[0] = 0x00;
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report->field[1]->value[0] = 0x00;
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strong = &report->field[2]->value[0];
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weak = &report->field[3]->value[0];
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debug("detected 4-field device");
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} else {
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dev_err(&hid->dev, "not enough fields or values\n");
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return -ENODEV;
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}
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plff = kzalloc(sizeof(struct plff_device), GFP_KERNEL);
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if (!plff)
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return -ENOMEM;
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dev = hidinput->input;
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set_bit(FF_RUMBLE, dev->ffbit);
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error = input_ff_create_memless(dev, plff, hid_plff_play);
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if (error) {
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kfree(plff);
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return error;
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}
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plff->report = report;
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plff->strong = strong;
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plff->weak = weak;
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*strong = 0x00;
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*weak = 0x00;
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usbhid_submit_report(hid, plff->report, USB_DIR_OUT);
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}
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dev_info(&hid->dev, "Force feedback for PantherLord/GreenAsia "
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"devices by Anssi Hannula <anssi.hannula@gmail.com>\n");
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return 0;
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}
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#else
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static inline int plff_init(struct hid_device *hid)
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{
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return 0;
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}
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#endif
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static int pl_probe(struct hid_device *hdev, const struct hid_device_id *id)
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{
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int ret;
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if (id->driver_data)
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hdev->quirks |= HID_QUIRK_MULTI_INPUT;
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ret = hid_parse(hdev);
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if (ret) {
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dev_err(&hdev->dev, "parse failed\n");
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goto err;
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}
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
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if (ret) {
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dev_err(&hdev->dev, "hw start failed\n");
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goto err;
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}
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plff_init(hdev);
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return 0;
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err:
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return ret;
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}
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static const struct hid_device_id pl_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR),
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.driver_data = 1 }, /* Twin USB Joystick */
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{ HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PCS_ADAPTOR),
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.driver_data = 1 }, /* Twin USB Joystick */
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{ HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0003), },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, pl_devices);
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static struct hid_driver pl_driver = {
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.name = "pantherlord",
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.id_table = pl_devices,
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.probe = pl_probe,
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};
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static int __init pl_init(void)
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{
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return hid_register_driver(&pl_driver);
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}
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static void __exit pl_exit(void)
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{
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hid_unregister_driver(&pl_driver);
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}
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module_init(pl_init);
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module_exit(pl_exit);
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MODULE_LICENSE("GPL");
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