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 axff_init(struct hid_device *hid) 63 { 64 struct axff_device *axff; 65 struct hid_report *report; 66 struct hid_input *hidinput; 67 struct list_head *report_list =&hid->report_enum[HID_OUTPUT_REPORT].report_list; 68 struct input_dev *dev; 69 int field_count = 0; 70 int i, j; 71 int error; 72 73 if (list_empty(&hid->inputs)) { 74 hid_err(hid, "no inputs found\n"); 75 return -ENODEV; 76 } 77 hidinput = list_first_entry(&hid->inputs, struct hid_input, list); 78 dev = hidinput->input; 79 80 if (list_empty(report_list)) { 81 hid_err(hid, "no output reports found\n"); 82 return -ENODEV; 83 } 84 85 report = list_first_entry(report_list, struct hid_report, list); 86 for (i = 0; i < report->maxfield; i++) { 87 for (j = 0; j < report->field[i]->report_count; j++) { 88 report->field[i]->value[j] = 0x00; 89 field_count++; 90 } 91 } 92 93 if (field_count < 4 && hid->product != 0xf705) { 94 hid_err(hid, "not enough fields in the report: %d\n", 95 field_count); 96 return -ENODEV; 97 } 98 99 axff = kzalloc(sizeof(struct axff_device), GFP_KERNEL); 100 if (!axff) 101 return -ENOMEM; 102 103 set_bit(FF_RUMBLE, dev->ffbit); 104 105 error = input_ff_create_memless(dev, axff, axff_play); 106 if (error) 107 goto err_free_mem; 108 109 axff->report = report; 110 hid_hw_request(hid, axff->report, HID_REQ_SET_REPORT); 111 112 hid_info(hid, "Force Feedback for ACRUX game controllers by Sergei Kolzun <x0r@dv-life.ru>\n"); 113 114 return 0; 115 116 err_free_mem: 117 kfree(axff); 118 return error; 119 } 120 #else 121 static inline int axff_init(struct hid_device *hid) 122 { 123 return 0; 124 } 125 #endif 126 127 static int ax_probe(struct hid_device *hdev, const struct hid_device_id *id) 128 { 129 int error; 130 131 dev_dbg(&hdev->dev, "ACRUX HID hardware probe...\n"); 132 133 error = hid_parse(hdev); 134 if (error) { 135 hid_err(hdev, "parse failed\n"); 136 return error; 137 } 138 139 error = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); 140 if (error) { 141 hid_err(hdev, "hw start failed\n"); 142 return error; 143 } 144 145 error = axff_init(hdev); 146 if (error) { 147 /* 148 * Do not fail device initialization completely as device 149 * may still be partially operable, just warn. 150 */ 151 hid_warn(hdev, 152 "Failed to enable force feedback support, error: %d\n", 153 error); 154 } 155 156 /* 157 * We need to start polling device right away, otherwise 158 * it will go into a coma. 159 */ 160 error = hid_hw_open(hdev); 161 if (error) { 162 dev_err(&hdev->dev, "hw open failed\n"); 163 hid_hw_stop(hdev); 164 return error; 165 } 166 167 return 0; 168 } 169 170 static void ax_remove(struct hid_device *hdev) 171 { 172 hid_hw_close(hdev); 173 hid_hw_stop(hdev); 174 } 175 176 static const struct hid_device_id ax_devices[] = { 177 { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802), }, 178 { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0xf705), }, 179 { } 180 }; 181 MODULE_DEVICE_TABLE(hid, ax_devices); 182 183 static struct hid_driver ax_driver = { 184 .name = "acrux", 185 .id_table = ax_devices, 186 .probe = ax_probe, 187 .remove = ax_remove, 188 }; 189 module_hid_driver(ax_driver); 190 191 MODULE_AUTHOR("Sergei Kolzun"); 192 MODULE_DESCRIPTION("Force feedback support for ACRUX game controllers"); 193 MODULE_LICENSE("GPL"); 194