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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 | // SPDX-License-Identifier: GPL-2.0-or-later /* * Force feedback support for Zeroplus based devices * * Copyright (c) 2005, 2006 Anssi Hannula <anssi.hannula@gmail.com> */ /* */ #include <linux/hid.h> #include <linux/input.h> #include <linux/slab.h> #include <linux/module.h> #include "hid-ids.h" #ifdef CONFIG_ZEROPLUS_FF struct zpff_device { struct hid_report *report; }; static int zpff_play(struct input_dev *dev, void *data, struct ff_effect *effect) { struct hid_device *hid = input_get_drvdata(dev); struct zpff_device *zpff = data; int left, right; /* * The following is specified the other way around in the Zeroplus * datasheet but the order below is correct for the XFX Executioner; * however it is possible that the XFX Executioner is an exception */ left = effect->u.rumble.strong_magnitude; right = effect->u.rumble.weak_magnitude; dbg_hid("called with 0x%04x 0x%04x\n", left, right); left = left * 0x7f / 0xffff; right = right * 0x7f / 0xffff; zpff->report->field[2]->value[0] = left; zpff->report->field[3]->value[0] = right; dbg_hid("running with 0x%02x 0x%02x\n", left, right); hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT); return 0; } static int zpff_init(struct hid_device *hid) { struct zpff_device *zpff; struct hid_report *report; struct hid_input *hidinput; struct input_dev *dev; int i, error; if (list_empty(&hid->inputs)) { hid_err(hid, "no inputs found\n"); return -ENODEV; } hidinput = list_entry(hid->inputs.next, struct hid_input, list); dev = hidinput->input; for (i = 0; i < 4; i++) { report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, i, 1); if (!report) return -ENODEV; } zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL); if (!zpff) return -ENOMEM; set_bit(FF_RUMBLE, dev->ffbit); error = input_ff_create_memless(dev, zpff, zpff_play); if (error) { kfree(zpff); return error; } zpff->report = report; zpff->report->field[0]->value[0] = 0x00; zpff->report->field[1]->value[0] = 0x02; zpff->report->field[2]->value[0] = 0x00; zpff->report->field[3]->value[0] = 0x00; hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT); hid_info(hid, "force feedback for Zeroplus based devices by Anssi Hannula <anssi.hannula@gmail.com>\n"); return 0; } #else static inline int zpff_init(struct hid_device *hid) { return 0; } #endif static int zp_probe(struct hid_device *hdev, const struct hid_device_id *id) { int ret; ret = hid_parse(hdev); if (ret) { hid_err(hdev, "parse failed\n"); goto err; } ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); if (ret) { hid_err(hdev, "hw start failed\n"); goto err; } zpff_init(hdev); return 0; err: return ret; } static const struct hid_device_id zp_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) }, { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) }, { } }; MODULE_DEVICE_TABLE(hid, zp_devices); static struct hid_driver zp_driver = { .name = "zeroplus", .id_table = zp_devices, .probe = zp_probe, }; module_hid_driver(zp_driver); MODULE_LICENSE("GPL"); |