^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Force feedback support for EMS Trio Linker Plus II
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2010 Ignaz Forster <ignaz.forster@gmx.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/hid.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "hid-ids.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) struct emsff_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct hid_report *report;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static int emsff_play(struct input_dev *dev, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct ff_effect *effect)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct hid_device *hid = input_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct emsff_device *emsff = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) int weak, strong;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) weak = effect->u.rumble.weak_magnitude;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) strong = effect->u.rumble.strong_magnitude;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) dbg_hid("called with 0x%04x 0x%04x\n", strong, weak);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) weak = weak * 0xff / 0xffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) strong = strong * 0xff / 0xffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) emsff->report->field[0]->value[1] = weak;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) emsff->report->field[0]->value[2] = strong;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) dbg_hid("running with 0x%02x 0x%02x\n", strong, weak);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) hid_hw_request(hid, emsff->report, HID_REQ_SET_REPORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static int emsff_init(struct hid_device *hid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct emsff_device *emsff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct hid_report *report;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct hid_input *hidinput;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct list_head *report_list =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) &hid->report_enum[HID_OUTPUT_REPORT].report_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct input_dev *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (list_empty(&hid->inputs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) hid_err(hid, "no inputs found\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) dev = hidinput->input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (list_empty(report_list)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) hid_err(hid, "no output reports found\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) report = list_first_entry(report_list, struct hid_report, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (report->maxfield < 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) hid_err(hid, "no fields in the report\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (report->field[0]->report_count < 7) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) hid_err(hid, "not enough values in the field\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) emsff = kzalloc(sizeof(struct emsff_device), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (!emsff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) set_bit(FF_RUMBLE, dev->ffbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) error = input_ff_create_memless(dev, emsff, emsff_play);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) kfree(emsff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) emsff->report = report;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) emsff->report->field[0]->value[0] = 0x01;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) emsff->report->field[0]->value[1] = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) emsff->report->field[0]->value[2] = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) emsff->report->field[0]->value[3] = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) emsff->report->field[0]->value[4] = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) emsff->report->field[0]->value[5] = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) emsff->report->field[0]->value[6] = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) hid_hw_request(hid, emsff->report, HID_REQ_SET_REPORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) hid_info(hid, "force feedback for EMS based devices by Ignaz Forster <ignaz.forster@gmx.de>\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static int ems_probe(struct hid_device *hdev, const struct hid_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) ret = hid_parse(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) hid_err(hdev, "parse failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) hid_err(hdev, "hw start failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) ret = emsff_init(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) dev_err(&hdev->dev, "force feedback init failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) hid_hw_stop(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static const struct hid_device_id ems_devices[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) { HID_USB_DEVICE(USB_VENDOR_ID_EMS, USB_DEVICE_ID_EMS_TRIO_LINKER_PLUS_II) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) MODULE_DEVICE_TABLE(hid, ems_devices);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) static struct hid_driver ems_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) .name = "hkems",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) .id_table = ems_devices,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) .probe = ems_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) module_hid_driver(ems_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags