1 /* 2 * Force feedback support for hid-compliant for some of the devices from 3 * Logitech, namely: 4 * - WingMan Cordless RumblePad 5 * - WingMan Force 3D 6 * 7 * Copyright (c) 2002-2004 Johann Deneux 8 * Copyright (c) 2006 Anssi Hannula <anssi.hannula@gmail.com> 9 */ 10 11 /* 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 25 * 26 * Should you need to contact me, the author, you can do so by 27 * e-mail - mail your message to <johann.deneux@it.uu.se> 28 */ 29 30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 31 32 #include <linux/input.h> 33 #include <linux/usb.h> 34 #include <linux/hid.h> 35 36 #include "usbhid/usbhid.h" 37 #include "hid-lg.h" 38 39 struct dev_type { 40 u16 idVendor; 41 u16 idProduct; 42 const signed short *ff; 43 }; 44 45 static const signed short ff_rumble[] = { 46 FF_RUMBLE, 47 -1 48 }; 49 50 static const signed short ff_joystick[] = { 51 FF_CONSTANT, 52 -1 53 }; 54 55 static const signed short ff_joystick_ac[] = { 56 FF_CONSTANT, 57 FF_AUTOCENTER, 58 -1 59 }; 60 61 static const struct dev_type devices[] = { 62 { 0x046d, 0xc211, ff_rumble }, 63 { 0x046d, 0xc219, ff_rumble }, 64 { 0x046d, 0xc283, ff_joystick }, 65 { 0x046d, 0xc286, ff_joystick_ac }, 66 { 0x046d, 0xc287, ff_joystick_ac }, 67 { 0x046d, 0xc293, ff_joystick }, 68 { 0x046d, 0xc295, ff_joystick }, 69 }; 70 71 static int hid_lgff_play(struct input_dev *dev, void *data, struct ff_effect *effect) 72 { 73 struct hid_device *hid = input_get_drvdata(dev); 74 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 75 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 76 int x, y; 77 unsigned int left, right; 78 79 #define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff 80 81 switch (effect->type) { 82 case FF_CONSTANT: 83 x = effect->u.ramp.start_level + 0x7f; /* 0x7f is center */ 84 y = effect->u.ramp.end_level + 0x7f; 85 CLAMP(x); 86 CLAMP(y); 87 report->field[0]->value[0] = 0x51; 88 report->field[0]->value[1] = 0x08; 89 report->field[0]->value[2] = x; 90 report->field[0]->value[3] = y; 91 dbg_hid("(x, y)=(%04x, %04x)\n", x, y); 92 usbhid_submit_report(hid, report, USB_DIR_OUT); 93 break; 94 95 case FF_RUMBLE: 96 right = effect->u.rumble.strong_magnitude; 97 left = effect->u.rumble.weak_magnitude; 98 right = right * 0xff / 0xffff; 99 left = left * 0xff / 0xffff; 100 CLAMP(left); 101 CLAMP(right); 102 report->field[0]->value[0] = 0x42; 103 report->field[0]->value[1] = 0x00; 104 report->field[0]->value[2] = left; 105 report->field[0]->value[3] = right; 106 dbg_hid("(left, right)=(%04x, %04x)\n", left, right); 107 usbhid_submit_report(hid, report, USB_DIR_OUT); 108 break; 109 } 110 return 0; 111 } 112 113 static void hid_lgff_set_autocenter(struct input_dev *dev, u16 magnitude) 114 { 115 struct hid_device *hid = input_get_drvdata(dev); 116 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 117 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 118 __s32 *value = report->field[0]->value; 119 magnitude = (magnitude >> 12) & 0xf; 120 *value++ = 0xfe; 121 *value++ = 0x0d; 122 *value++ = magnitude; /* clockwise strength */ 123 *value++ = magnitude; /* counter-clockwise strength */ 124 *value++ = 0x80; 125 *value++ = 0x00; 126 *value = 0x00; 127 usbhid_submit_report(hid, report, USB_DIR_OUT); 128 } 129 130 int lgff_init(struct hid_device* hid) 131 { 132 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list); 133 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 134 struct input_dev *dev = hidinput->input; 135 struct hid_report *report; 136 struct hid_field *field; 137 const signed short *ff_bits = ff_joystick; 138 int error; 139 int i; 140 141 /* Find the report to use */ 142 if (list_empty(report_list)) { 143 hid_err(hid, "No output report found\n"); 144 return -1; 145 } 146 147 /* Check that the report looks ok */ 148 report = list_entry(report_list->next, struct hid_report, list); 149 field = report->field[0]; 150 if (!field) { 151 hid_err(hid, "NULL field\n"); 152 return -1; 153 } 154 155 for (i = 0; i < ARRAY_SIZE(devices); i++) { 156 if (dev->id.vendor == devices[i].idVendor && 157 dev->id.product == devices[i].idProduct) { 158 ff_bits = devices[i].ff; 159 break; 160 } 161 } 162 163 for (i = 0; ff_bits[i] >= 0; i++) 164 set_bit(ff_bits[i], dev->ffbit); 165 166 error = input_ff_create_memless(dev, NULL, hid_lgff_play); 167 if (error) 168 return error; 169 170 if ( test_bit(FF_AUTOCENTER, dev->ffbit) ) 171 dev->ff->set_autocenter = hid_lgff_set_autocenter; 172 173 pr_info("Force feedback for Logitech force feedback devices by Johann Deneux <johann.deneux@it.uu.se>\n"); 174 175 return 0; 176 } 177