1 /* 2 * Force feedback support for Zeroplus based devices 3 * 4 * Copyright (c) 2005, 2006 Anssi Hannula <anssi.hannula@gmail.com> 5 */ 6 7 /* 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 */ 22 23 24 #include <linux/hid.h> 25 #include <linux/input.h> 26 #include <linux/usb.h> 27 28 #include "hid-ids.h" 29 30 #include "usbhid/usbhid.h" 31 32 struct zpff_device { 33 struct hid_report *report; 34 }; 35 36 static int zpff_play(struct input_dev *dev, void *data, 37 struct ff_effect *effect) 38 { 39 struct hid_device *hid = input_get_drvdata(dev); 40 struct zpff_device *zpff = data; 41 int left, right; 42 43 /* 44 * The following is specified the other way around in the Zeroplus 45 * datasheet but the order below is correct for the XFX Executioner; 46 * however it is possible that the XFX Executioner is an exception 47 */ 48 49 left = effect->u.rumble.strong_magnitude; 50 right = effect->u.rumble.weak_magnitude; 51 dbg_hid("called with 0x%04x 0x%04x\n", left, right); 52 53 left = left * 0x7f / 0xffff; 54 right = right * 0x7f / 0xffff; 55 56 zpff->report->field[2]->value[0] = left; 57 zpff->report->field[3]->value[0] = right; 58 dbg_hid("running with 0x%02x 0x%02x\n", left, right); 59 usbhid_submit_report(hid, zpff->report, USB_DIR_OUT); 60 61 return 0; 62 } 63 64 static int zpff_init(struct hid_device *hid) 65 { 66 struct zpff_device *zpff; 67 struct hid_report *report; 68 struct hid_input *hidinput = list_entry(hid->inputs.next, 69 struct hid_input, list); 70 struct list_head *report_list = 71 &hid->report_enum[HID_OUTPUT_REPORT].report_list; 72 struct input_dev *dev = hidinput->input; 73 int error; 74 75 if (list_empty(report_list)) { 76 dev_err(&hid->dev, "no output report found\n"); 77 return -ENODEV; 78 } 79 80 report = list_entry(report_list->next, struct hid_report, list); 81 82 if (report->maxfield < 4) { 83 dev_err(&hid->dev, "not enough fields in report\n"); 84 return -ENODEV; 85 } 86 87 zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL); 88 if (!zpff) 89 return -ENOMEM; 90 91 set_bit(FF_RUMBLE, dev->ffbit); 92 93 error = input_ff_create_memless(dev, zpff, zpff_play); 94 if (error) { 95 kfree(zpff); 96 return error; 97 } 98 99 zpff->report = report; 100 zpff->report->field[0]->value[0] = 0x00; 101 zpff->report->field[1]->value[0] = 0x02; 102 zpff->report->field[2]->value[0] = 0x00; 103 zpff->report->field[3]->value[0] = 0x00; 104 usbhid_submit_report(hid, zpff->report, USB_DIR_OUT); 105 106 dev_info(&hid->dev, "force feedback for Zeroplus based devices by " 107 "Anssi Hannula <anssi.hannula@gmail.com>\n"); 108 109 return 0; 110 } 111 112 static int zp_probe(struct hid_device *hdev, const struct hid_device_id *id) 113 { 114 int ret; 115 116 ret = hid_parse(hdev); 117 if (ret) { 118 dev_err(&hdev->dev, "parse failed\n"); 119 goto err; 120 } 121 122 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); 123 if (ret) { 124 dev_err(&hdev->dev, "hw start failed\n"); 125 goto err; 126 } 127 128 zpff_init(hdev); 129 130 return 0; 131 err: 132 return ret; 133 } 134 135 static const struct hid_device_id zp_devices[] = { 136 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) }, 137 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) }, 138 { } 139 }; 140 MODULE_DEVICE_TABLE(hid, zp_devices); 141 142 static struct hid_driver zp_driver = { 143 .name = "zeroplus", 144 .id_table = zp_devices, 145 .probe = zp_probe, 146 }; 147 148 static int zp_init(void) 149 { 150 return hid_register_driver(&zp_driver); 151 } 152 153 static void zp_exit(void) 154 { 155 hid_unregister_driver(&zp_driver); 156 } 157 158 module_init(zp_init); 159 module_exit(zp_exit); 160 MODULE_LICENSE("GPL"); 161 162 HID_COMPAT_LOAD_DRIVER(zeroplus); 163