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/slab.h> 27 #include <linux/usb.h> 28 #include <linux/module.h> 29 30 #include "hid-ids.h" 31 32 #ifdef CONFIG_ZEROPLUS_FF 33 #include "usbhid/usbhid.h" 34 35 struct zpff_device { 36 struct hid_report *report; 37 }; 38 39 static int zpff_play(struct input_dev *dev, void *data, 40 struct ff_effect *effect) 41 { 42 struct hid_device *hid = input_get_drvdata(dev); 43 struct zpff_device *zpff = data; 44 int left, right; 45 46 /* 47 * The following is specified the other way around in the Zeroplus 48 * datasheet but the order below is correct for the XFX Executioner; 49 * however it is possible that the XFX Executioner is an exception 50 */ 51 52 left = effect->u.rumble.strong_magnitude; 53 right = effect->u.rumble.weak_magnitude; 54 dbg_hid("called with 0x%04x 0x%04x\n", left, right); 55 56 left = left * 0x7f / 0xffff; 57 right = right * 0x7f / 0xffff; 58 59 zpff->report->field[2]->value[0] = left; 60 zpff->report->field[3]->value[0] = right; 61 dbg_hid("running with 0x%02x 0x%02x\n", left, right); 62 usbhid_submit_report(hid, zpff->report, USB_DIR_OUT); 63 64 return 0; 65 } 66 67 static int zpff_init(struct hid_device *hid) 68 { 69 struct zpff_device *zpff; 70 struct hid_report *report; 71 struct hid_input *hidinput = list_entry(hid->inputs.next, 72 struct hid_input, list); 73 struct list_head *report_list = 74 &hid->report_enum[HID_OUTPUT_REPORT].report_list; 75 struct input_dev *dev = hidinput->input; 76 int error; 77 78 if (list_empty(report_list)) { 79 hid_err(hid, "no output report found\n"); 80 return -ENODEV; 81 } 82 83 report = list_entry(report_list->next, struct hid_report, list); 84 85 if (report->maxfield < 4) { 86 hid_err(hid, "not enough fields in report\n"); 87 return -ENODEV; 88 } 89 90 zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL); 91 if (!zpff) 92 return -ENOMEM; 93 94 set_bit(FF_RUMBLE, dev->ffbit); 95 96 error = input_ff_create_memless(dev, zpff, zpff_play); 97 if (error) { 98 kfree(zpff); 99 return error; 100 } 101 102 zpff->report = report; 103 zpff->report->field[0]->value[0] = 0x00; 104 zpff->report->field[1]->value[0] = 0x02; 105 zpff->report->field[2]->value[0] = 0x00; 106 zpff->report->field[3]->value[0] = 0x00; 107 usbhid_submit_report(hid, zpff->report, USB_DIR_OUT); 108 109 hid_info(hid, "force feedback for Zeroplus based devices by Anssi Hannula <anssi.hannula@gmail.com>\n"); 110 111 return 0; 112 } 113 #else 114 static inline int zpff_init(struct hid_device *hid) 115 { 116 return 0; 117 } 118 #endif 119 120 static int zp_probe(struct hid_device *hdev, const struct hid_device_id *id) 121 { 122 int ret; 123 124 ret = hid_parse(hdev); 125 if (ret) { 126 hid_err(hdev, "parse failed\n"); 127 goto err; 128 } 129 130 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); 131 if (ret) { 132 hid_err(hdev, "hw start failed\n"); 133 goto err; 134 } 135 136 zpff_init(hdev); 137 138 return 0; 139 err: 140 return ret; 141 } 142 143 static const struct hid_device_id zp_devices[] = { 144 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) }, 145 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) }, 146 { } 147 }; 148 MODULE_DEVICE_TABLE(hid, zp_devices); 149 150 static struct hid_driver zp_driver = { 151 .name = "zeroplus", 152 .id_table = zp_devices, 153 .probe = zp_probe, 154 }; 155 156 static int __init zp_init(void) 157 { 158 return hid_register_driver(&zp_driver); 159 } 160 161 static void __exit zp_exit(void) 162 { 163 hid_unregister_driver(&zp_driver); 164 } 165 166 module_init(zp_init); 167 module_exit(zp_exit); 168 MODULE_LICENSE("GPL"); 169