1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Force feedback support for ACRUX game controllers 4 * 5 * From what I have gathered, these devices are mass produced in China 6 * by several vendors. They often share the same design as the original 7 * Xbox 360 controller. 8 * 9 * 1a34:0802 "ACRUX USB GAMEPAD 8116" 10 * - tested with an EXEQ EQ-PCU-02090 game controller. 11 * 12 * Copyright (c) 2010 Sergei Kolzun <x0r@dv-life.ru> 13 */ 14 15 /* 16 */ 17 18 #include <linux/input.h> 19 #include <linux/slab.h> 20 #include <linux/hid.h> 21 #include <linux/module.h> 22 23 #include "hid-ids.h" 24 25 #ifdef CONFIG_HID_ACRUX_FF 26 27 struct axff_device { 28 struct hid_report *report; 29 }; 30 31 static int axff_play(struct input_dev *dev, void *data, struct ff_effect *effect) 32 { 33 struct hid_device *hid = input_get_drvdata(dev); 34 struct axff_device *axff = data; 35 struct hid_report *report = axff->report; 36 int field_count = 0; 37 int left, right; 38 int i, j; 39 40 left = effect->u.rumble.strong_magnitude; 41 right = effect->u.rumble.weak_magnitude; 42 43 dbg_hid("called with 0x%04x 0x%04x", left, right); 44 45 left = left * 0xff / 0xffff; 46 right = right * 0xff / 0xffff; 47 48 for (i = 0; i < report->maxfield; i++) { 49 for (j = 0; j < report->field[i]->report_count; j++) { 50 report->field[i]->value[j] = 51 field_count % 2 ? right : left; 52 field_count++; 53 } 54 } 55 56 dbg_hid("running with 0x%02x 0x%02x", left, right); 57 hid_hw_request(hid, axff->report, HID_REQ_SET_REPORT); 58 59 return 0; 60 } 61 62 static int ax_input_configured(struct hid_device *hid, struct hid_input *hidinput) 63 { 64 struct axff_device *axff; 65 struct hid_report *report; 66 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 67 struct input_dev *dev = hidinput->input; 68 int field_count = 0; 69 int i, j; 70 int error; 71 72 if (!list_is_first(&hidinput->list, &hid->inputs)) 73 return 0; 74 75 report = list_first_entry_or_null(report_list, struct hid_report, list); 76 if (!report) { 77 hid_err(hid, "no output reports found\n"); 78 return -ENODEV; 79 } 80 for (i = 0; i < report->maxfield; i++) { 81 for (j = 0; j < report->field[i]->report_count; j++) { 82 report->field[i]->value[j] = 0x00; 83 field_count++; 84 } 85 } 86 87 if (field_count < 4 && hid->product != 0xf705) { 88 hid_err(hid, "not enough fields in the report: %d\n", 89 field_count); 90 return -ENODEV; 91 } 92 93 axff = kzalloc_obj(struct axff_device); 94 if (!axff) 95 return -ENOMEM; 96 97 axff->report = report; 98 set_bit(FF_RUMBLE, dev->ffbit); 99 100 error = input_ff_create_memless(dev, axff, axff_play); 101 if (error) 102 goto err_free_mem; 103 104 hid_hw_request(hid, axff->report, HID_REQ_SET_REPORT); 105 106 hid_info(hid, "Force Feedback for ACRUX game controllers by Sergei Kolzun <x0r@dv-life.ru>\n"); 107 108 return 0; 109 110 err_free_mem: 111 kfree(axff); 112 return error; 113 } 114 #else 115 static inline int ax_input_configured(struct hid_device *hid, 116 struct hid_input *hidinput) 117 { 118 return 0; 119 } 120 #endif 121 122 static int ax_probe(struct hid_device *hdev, const struct hid_device_id *id) 123 { 124 int error; 125 126 dev_dbg(&hdev->dev, "ACRUX HID hardware probe...\n"); 127 128 error = hid_parse(hdev); 129 if (error) { 130 hid_err(hdev, "parse failed\n"); 131 return error; 132 } 133 134 error = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 135 if (error) { 136 hid_err(hdev, "hw start failed\n"); 137 return error; 138 } 139 /* 140 * We need to start polling device right away, otherwise 141 * it will go into a coma. 142 */ 143 error = hid_hw_open(hdev); 144 if (error) { 145 dev_err(&hdev->dev, "hw open failed\n"); 146 hid_hw_stop(hdev); 147 return error; 148 } 149 150 return 0; 151 } 152 153 static void ax_remove(struct hid_device *hdev) 154 { 155 hid_hw_close(hdev); 156 hid_hw_stop(hdev); 157 } 158 159 static const struct hid_device_id ax_devices[] = { 160 { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802), }, 161 { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0xf705), }, 162 { } 163 }; 164 MODULE_DEVICE_TABLE(hid, ax_devices); 165 166 static struct hid_driver ax_driver = { 167 .name = "acrux", 168 .id_table = ax_devices, 169 .probe = ax_probe, 170 .remove = ax_remove, 171 .input_configured = ax_input_configured, 172 }; 173 module_hid_driver(ax_driver); 174 175 MODULE_AUTHOR("Sergei Kolzun"); 176 MODULE_DESCRIPTION("Force feedback support for ACRUX game controllers"); 177 MODULE_LICENSE("GPL"); 178