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bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
149 lines
3.3 KiB
C
149 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Force feedback support for EMS Trio Linker Plus II
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*
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* Copyright (c) 2010 Ignaz Forster <ignaz.forster@gmx.de>
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*/
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/*
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*/
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#include <linux/hid.h>
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#include <linux/input.h>
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#include <linux/module.h>
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#include "hid-ids.h"
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struct emsff_device {
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struct hid_report *report;
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};
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static int emsff_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 emsff_device *emsff = data;
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int weak, strong;
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weak = effect->u.rumble.weak_magnitude;
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strong = effect->u.rumble.strong_magnitude;
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dbg_hid("called with 0x%04x 0x%04x\n", strong, weak);
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weak = weak * 0xff / 0xffff;
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strong = strong * 0xff / 0xffff;
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emsff->report->field[0]->value[1] = weak;
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emsff->report->field[0]->value[2] = strong;
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dbg_hid("running with 0x%02x 0x%02x\n", strong, weak);
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hid_hw_request(hid, emsff->report, HID_REQ_SET_REPORT);
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return 0;
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}
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static int emsff_init(struct hid_device *hid)
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{
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struct emsff_device *emsff;
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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 input_dev *dev;
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int error;
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if (list_empty(&hid->inputs)) {
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hid_err(hid, "no inputs found\n");
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return -ENODEV;
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}
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hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
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dev = hidinput->input;
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if (list_empty(report_list)) {
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hid_err(hid, "no output reports found\n");
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return -ENODEV;
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}
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report = list_first_entry(report_list, struct hid_report, list);
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if (report->maxfield < 1) {
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hid_err(hid, "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 < 7) {
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hid_err(hid, "not enough values in the field\n");
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return -ENODEV;
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}
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emsff = kzalloc_obj(struct emsff_device);
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if (!emsff)
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return -ENOMEM;
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set_bit(FF_RUMBLE, dev->ffbit);
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error = input_ff_create_memless(dev, emsff, emsff_play);
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if (error) {
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kfree(emsff);
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return error;
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}
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emsff->report = report;
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emsff->report->field[0]->value[0] = 0x01;
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emsff->report->field[0]->value[1] = 0x00;
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emsff->report->field[0]->value[2] = 0x00;
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emsff->report->field[0]->value[3] = 0x00;
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emsff->report->field[0]->value[4] = 0x00;
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emsff->report->field[0]->value[5] = 0x00;
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emsff->report->field[0]->value[6] = 0x00;
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hid_hw_request(hid, emsff->report, HID_REQ_SET_REPORT);
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hid_info(hid, "force feedback for EMS based devices by Ignaz Forster <ignaz.forster@gmx.de>\n");
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return 0;
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}
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static int ems_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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ret = hid_parse(hdev);
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if (ret) {
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hid_err(hdev, "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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hid_err(hdev, "hw start failed\n");
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goto err;
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}
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ret = emsff_init(hdev);
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if (ret) {
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dev_err(&hdev->dev, "force feedback init failed\n");
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hid_hw_stop(hdev);
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goto err;
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}
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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 ems_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_EMS, USB_DEVICE_ID_EMS_TRIO_LINKER_PLUS_II) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, ems_devices);
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static struct hid_driver ems_driver = {
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.name = "hkems",
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.id_table = ems_devices,
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.probe = ems_probe,
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};
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module_hid_driver(ems_driver);
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MODULE_DESCRIPTION("Force feedback support for EMS Trio Linker Plus II");
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MODULE_LICENSE("GPL");
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