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