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/module.h> 28 29 #include "hid-ids.h" 30 31 #ifdef CONFIG_ZEROPLUS_FF 32 33 struct zpff_device { 34 struct hid_report *report; 35 }; 36 37 static int zpff_play(struct input_dev *dev, void *data, 38 struct ff_effect *effect) 39 { 40 struct hid_device *hid = input_get_drvdata(dev); 41 struct zpff_device *zpff = data; 42 int left, right; 43 44 /* 45 * The following is specified the other way around in the Zeroplus 46 * datasheet but the order below is correct for the XFX Executioner; 47 * however it is possible that the XFX Executioner is an exception 48 */ 49 50 left = effect->u.rumble.strong_magnitude; 51 right = effect->u.rumble.weak_magnitude; 52 dbg_hid("called with 0x%04x 0x%04x\n", left, right); 53 54 left = left * 0x7f / 0xffff; 55 right = right * 0x7f / 0xffff; 56 57 zpff->report->field[2]->value[0] = left; 58 zpff->report->field[3]->value[0] = right; 59 dbg_hid("running with 0x%02x 0x%02x\n", left, right); 60 hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT); 61 62 return 0; 63 } 64 65 static int zpff_init(struct hid_device *hid) 66 { 67 struct zpff_device *zpff; 68 struct hid_report *report; 69 struct hid_input *hidinput = list_entry(hid->inputs.next, 70 struct hid_input, list); 71 struct input_dev *dev = hidinput->input; 72 int i, error; 73 74 for (i = 0; i < 4; i++) { 75 report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, i, 1); 76 if (!report) 77 return -ENODEV; 78 } 79 80 zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL); 81 if (!zpff) 82 return -ENOMEM; 83 84 set_bit(FF_RUMBLE, dev->ffbit); 85 86 error = input_ff_create_memless(dev, zpff, zpff_play); 87 if (error) { 88 kfree(zpff); 89 return error; 90 } 91 92 zpff->report = report; 93 zpff->report->field[0]->value[0] = 0x00; 94 zpff->report->field[1]->value[0] = 0x02; 95 zpff->report->field[2]->value[0] = 0x00; 96 zpff->report->field[3]->value[0] = 0x00; 97 hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT); 98 99 hid_info(hid, "force feedback for Zeroplus based devices by Anssi Hannula <anssi.hannula@gmail.com>\n"); 100 101 return 0; 102 } 103 #else 104 static inline int zpff_init(struct hid_device *hid) 105 { 106 return 0; 107 } 108 #endif 109 110 static int zp_probe(struct hid_device *hdev, const struct hid_device_id *id) 111 { 112 int ret; 113 114 ret = hid_parse(hdev); 115 if (ret) { 116 hid_err(hdev, "parse failed\n"); 117 goto err; 118 } 119 120 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); 121 if (ret) { 122 hid_err(hdev, "hw start failed\n"); 123 goto err; 124 } 125 126 zpff_init(hdev); 127 128 return 0; 129 err: 130 return ret; 131 } 132 133 static const struct hid_device_id zp_devices[] = { 134 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) }, 135 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) }, 136 { } 137 }; 138 MODULE_DEVICE_TABLE(hid, zp_devices); 139 140 static struct hid_driver zp_driver = { 141 .name = "zeroplus", 142 .id_table = zp_devices, 143 .probe = zp_probe, 144 }; 145 module_hid_driver(zp_driver); 146 147 MODULE_LICENSE("GPL"); 148