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95 lines
2.2 KiB
95 lines
2.2 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Force feedback support for Logitech RumblePad and Rumblepad 2 |
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* |
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* Copyright (c) 2008 Anssi Hannula <[email protected]> |
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*/ |
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/* |
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*/ |
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#include <linux/input.h> |
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#include <linux/slab.h> |
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#include <linux/hid.h> |
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#include "hid-lg.h" |
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struct lg2ff_device { |
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struct hid_report *report; |
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}; |
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static int play_effect(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 lg2ff_device *lg2ff = data; |
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int weak, strong; |
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strong = effect->u.rumble.strong_magnitude; |
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weak = effect->u.rumble.weak_magnitude; |
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if (weak || strong) { |
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weak = weak * 0xff / 0xffff; |
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strong = strong * 0xff / 0xffff; |
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lg2ff->report->field[0]->value[0] = 0x51; |
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lg2ff->report->field[0]->value[2] = weak; |
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lg2ff->report->field[0]->value[4] = strong; |
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} else { |
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lg2ff->report->field[0]->value[0] = 0xf3; |
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lg2ff->report->field[0]->value[2] = 0x00; |
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lg2ff->report->field[0]->value[4] = 0x00; |
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} |
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hid_hw_request(hid, lg2ff->report, HID_REQ_SET_REPORT); |
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return 0; |
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} |
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int lg2ff_init(struct hid_device *hid) |
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{ |
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struct lg2ff_device *lg2ff; |
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struct hid_report *report; |
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struct hid_input *hidinput; |
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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_entry(hid->inputs.next, struct hid_input, list); |
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dev = hidinput->input; |
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/* Check that the report looks ok */ |
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report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7); |
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if (!report) |
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return -ENODEV; |
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lg2ff = kmalloc(sizeof(struct lg2ff_device), GFP_KERNEL); |
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if (!lg2ff) |
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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, lg2ff, play_effect); |
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if (error) { |
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kfree(lg2ff); |
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return error; |
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} |
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lg2ff->report = report; |
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report->field[0]->value[0] = 0xf3; |
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report->field[0]->value[1] = 0x00; |
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report->field[0]->value[2] = 0x00; |
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report->field[0]->value[3] = 0x00; |
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report->field[0]->value[4] = 0x00; |
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report->field[0]->value[5] = 0x00; |
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report->field[0]->value[6] = 0x00; |
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hid_hw_request(hid, report, HID_REQ_SET_REPORT); |
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hid_info(hid, "Force feedback for Logitech variant 2 rumble devices by Anssi Hannula <[email protected]>\n"); |
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return 0; |
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}
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