759 lines
20 KiB
C
759 lines
20 KiB
C
/*
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* Force feedback support for Logitech Gaming Wheels
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*
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* Including G27, G25, DFP, DFGT, FFEX, Momo, Momo2 &
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* Speed Force Wireless (WiiWheel)
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*
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* Copyright (c) 2010 Simon Wood <simon@mungewell.org>
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/input.h>
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#include <linux/usb.h>
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#include <linux/hid.h>
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#include "usbhid/usbhid.h"
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#include "hid-lg.h"
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#include "hid-ids.h"
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#define DFGT_REV_MAJ 0x13
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#define DFGT_REV_MIN 0x22
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#define DFGT2_REV_MIN 0x26
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#define DFP_REV_MAJ 0x11
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#define DFP_REV_MIN 0x06
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#define FFEX_REV_MAJ 0x21
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#define FFEX_REV_MIN 0x00
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#define G25_REV_MAJ 0x12
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#define G25_REV_MIN 0x22
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#define G27_REV_MAJ 0x12
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#define G27_REV_MIN 0x38
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#define G27_2_REV_MIN 0x39
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#define to_hid_device(pdev) container_of(pdev, struct hid_device, dev)
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static void hid_lg4ff_set_range_dfp(struct hid_device *hid, u16 range);
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static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range);
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static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf);
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static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count);
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static DEVICE_ATTR(range, S_IRWXU | S_IRWXG | S_IROTH, lg4ff_range_show, lg4ff_range_store);
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struct lg4ff_device_entry {
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__u32 product_id;
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__u16 range;
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__u16 min_range;
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__u16 max_range;
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#ifdef CONFIG_LEDS_CLASS
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__u8 led_state;
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struct led_classdev *led[5];
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#endif
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struct list_head list;
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void (*set_range)(struct hid_device *hid, u16 range);
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};
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static const signed short lg4ff_wheel_effects[] = {
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FF_CONSTANT,
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FF_AUTOCENTER,
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-1
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};
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struct lg4ff_wheel {
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const __u32 product_id;
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const signed short *ff_effects;
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const __u16 min_range;
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const __u16 max_range;
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void (*set_range)(struct hid_device *hid, u16 range);
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};
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static const struct lg4ff_wheel lg4ff_devices[] = {
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{USB_DEVICE_ID_LOGITECH_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
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{USB_DEVICE_ID_LOGITECH_MOMO_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
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{USB_DEVICE_ID_LOGITECH_DFP_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_dfp},
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{USB_DEVICE_ID_LOGITECH_G25_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
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{USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
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{USB_DEVICE_ID_LOGITECH_G27_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
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{USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2, lg4ff_wheel_effects, 40, 270, NULL},
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{USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}
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};
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struct lg4ff_native_cmd {
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const __u8 cmd_num; /* Number of commands to send */
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const __u8 cmd[];
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};
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struct lg4ff_usb_revision {
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const __u16 rev_maj;
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const __u16 rev_min;
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const struct lg4ff_native_cmd *command;
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};
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static const struct lg4ff_native_cmd native_dfp = {
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1,
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{0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00}
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};
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static const struct lg4ff_native_cmd native_dfgt = {
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2,
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{0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */
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0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00} /* 2nd command */
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};
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static const struct lg4ff_native_cmd native_g25 = {
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1,
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{0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00}
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};
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static const struct lg4ff_native_cmd native_g27 = {
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2,
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{0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */
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0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00} /* 2nd command */
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};
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static const struct lg4ff_usb_revision lg4ff_revs[] = {
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{DFGT_REV_MAJ, DFGT_REV_MIN, &native_dfgt}, /* Driving Force GT */
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{DFGT_REV_MAJ, DFGT2_REV_MIN, &native_dfgt}, /* Driving Force GT v2 */
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{DFP_REV_MAJ, DFP_REV_MIN, &native_dfp}, /* Driving Force Pro */
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{G25_REV_MAJ, G25_REV_MIN, &native_g25}, /* G25 */
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{G27_REV_MAJ, G27_REV_MIN, &native_g27}, /* G27 */
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{G27_REV_MAJ, G27_2_REV_MIN, &native_g27}, /* G27 v2 */
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};
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/* Recalculates X axis value accordingly to currently selected range */
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static __s32 lg4ff_adjust_dfp_x_axis(__s32 value, __u16 range)
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{
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__u16 max_range;
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__s32 new_value;
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if (range == 900)
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return value;
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else if (range == 200)
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return value;
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else if (range < 200)
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max_range = 200;
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else
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max_range = 900;
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new_value = 8192 + mult_frac(value - 8192, max_range, range);
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if (new_value < 0)
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return 0;
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else if (new_value > 16383)
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return 16383;
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else
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return new_value;
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}
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int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field,
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struct hid_usage *usage, __s32 value, struct lg_drv_data *drv_data)
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{
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struct lg4ff_device_entry *entry = drv_data->device_props;
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__s32 new_value = 0;
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if (!entry) {
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hid_err(hid, "Device properties not found");
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return 0;
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}
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switch (entry->product_id) {
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case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
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switch (usage->code) {
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case ABS_X:
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new_value = lg4ff_adjust_dfp_x_axis(value, entry->range);
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input_event(field->hidinput->input, usage->type, usage->code, new_value);
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return 1;
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default:
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return 0;
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}
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default:
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return 0;
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}
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}
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static int hid_lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
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{
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struct hid_device *hid = input_get_drvdata(dev);
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struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
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struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
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__s32 *value = report->field[0]->value;
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int x;
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#define CLAMP(x) do { if (x < 0) x = 0; else if (x > 0xff) x = 0xff; } while (0)
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switch (effect->type) {
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case FF_CONSTANT:
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x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
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CLAMP(x);
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if (x == 0x80) {
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/* De-activate force in slot-1*/
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value[0] = 0x13;
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value[1] = 0x00;
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value[2] = 0x00;
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value[3] = 0x00;
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value[4] = 0x00;
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value[5] = 0x00;
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value[6] = 0x00;
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hid_hw_request(hid, report, HID_REQ_SET_REPORT);
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return 0;
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}
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value[0] = 0x11; /* Slot 1 */
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value[1] = 0x08;
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value[2] = x;
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value[3] = 0x80;
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value[4] = 0x00;
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value[5] = 0x00;
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value[6] = 0x00;
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hid_hw_request(hid, report, HID_REQ_SET_REPORT);
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break;
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}
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return 0;
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}
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/* Sends default autocentering command compatible with
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* all wheels except Formula Force EX */
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static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
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{
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struct hid_device *hid = input_get_drvdata(dev);
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struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
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struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
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__s32 *value = report->field[0]->value;
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__u32 expand_a, expand_b;
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struct lg4ff_device_entry *entry;
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struct lg_drv_data *drv_data;
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drv_data = hid_get_drvdata(hid);
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if (!drv_data) {
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hid_err(hid, "Private driver data not found!\n");
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return;
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}
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entry = drv_data->device_props;
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if (!entry) {
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hid_err(hid, "Device properties not found!\n");
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return;
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}
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/* De-activate Auto-Center */
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if (magnitude == 0) {
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value[0] = 0xf5;
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value[1] = 0x00;
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value[2] = 0x00;
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value[3] = 0x00;
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value[4] = 0x00;
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value[5] = 0x00;
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value[6] = 0x00;
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hid_hw_request(hid, report, HID_REQ_SET_REPORT);
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return;
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}
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if (magnitude <= 0xaaaa) {
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expand_a = 0x0c * magnitude;
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expand_b = 0x80 * magnitude;
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} else {
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expand_a = (0x0c * 0xaaaa) + 0x06 * (magnitude - 0xaaaa);
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expand_b = (0x80 * 0xaaaa) + 0xff * (magnitude - 0xaaaa);
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}
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/* Adjust for non-MOMO wheels */
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switch (entry->product_id) {
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case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL:
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case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2:
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break;
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default:
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expand_a = expand_a >> 1;
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break;
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}
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value[0] = 0xfe;
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value[1] = 0x0d;
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value[2] = expand_a / 0xaaaa;
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value[3] = expand_a / 0xaaaa;
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value[4] = expand_b / 0xaaaa;
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value[5] = 0x00;
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value[6] = 0x00;
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hid_hw_request(hid, report, HID_REQ_SET_REPORT);
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/* Activate Auto-Center */
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value[0] = 0x14;
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value[1] = 0x00;
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value[2] = 0x00;
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value[3] = 0x00;
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value[4] = 0x00;
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value[5] = 0x00;
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value[6] = 0x00;
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hid_hw_request(hid, report, HID_REQ_SET_REPORT);
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}
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/* Sends autocentering command compatible with Formula Force EX */
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static void hid_lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
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{
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struct hid_device *hid = input_get_drvdata(dev);
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struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
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struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
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__s32 *value = report->field[0]->value;
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magnitude = magnitude * 90 / 65535;
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value[0] = 0xfe;
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value[1] = 0x03;
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value[2] = magnitude >> 14;
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value[3] = magnitude >> 14;
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value[4] = magnitude;
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value[5] = 0x00;
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value[6] = 0x00;
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hid_hw_request(hid, report, HID_REQ_SET_REPORT);
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}
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/* Sends command to set range compatible with G25/G27/Driving Force GT */
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static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range)
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{
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struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
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struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
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__s32 *value = report->field[0]->value;
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dbg_hid("G25/G27/DFGT: setting range to %u\n", range);
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value[0] = 0xf8;
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value[1] = 0x81;
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value[2] = range & 0x00ff;
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value[3] = (range & 0xff00) >> 8;
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value[4] = 0x00;
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value[5] = 0x00;
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value[6] = 0x00;
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hid_hw_request(hid, report, HID_REQ_SET_REPORT);
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}
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/* Sends commands to set range compatible with Driving Force Pro wheel */
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static void hid_lg4ff_set_range_dfp(struct hid_device *hid, __u16 range)
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{
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struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
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struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
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int start_left, start_right, full_range;
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__s32 *value = report->field[0]->value;
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dbg_hid("Driving Force Pro: setting range to %u\n", range);
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/* Prepare "coarse" limit command */
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value[0] = 0xf8;
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value[1] = 0x00; /* Set later */
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value[2] = 0x00;
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value[3] = 0x00;
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value[4] = 0x00;
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value[5] = 0x00;
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value[6] = 0x00;
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if (range > 200) {
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report->field[0]->value[1] = 0x03;
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full_range = 900;
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} else {
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report->field[0]->value[1] = 0x02;
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full_range = 200;
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}
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hid_hw_request(hid, report, HID_REQ_SET_REPORT);
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/* Prepare "fine" limit command */
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value[0] = 0x81;
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value[1] = 0x0b;
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value[2] = 0x00;
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value[3] = 0x00;
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value[4] = 0x00;
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value[5] = 0x00;
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value[6] = 0x00;
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if (range == 200 || range == 900) { /* Do not apply any fine limit */
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hid_hw_request(hid, report, HID_REQ_SET_REPORT);
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return;
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}
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/* Construct fine limit command */
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start_left = (((full_range - range + 1) * 2047) / full_range);
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start_right = 0xfff - start_left;
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value[2] = start_left >> 4;
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value[3] = start_right >> 4;
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value[4] = 0xff;
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value[5] = (start_right & 0xe) << 4 | (start_left & 0xe);
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value[6] = 0xff;
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hid_hw_request(hid, report, HID_REQ_SET_REPORT);
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}
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static void hid_lg4ff_switch_native(struct hid_device *hid, const struct lg4ff_native_cmd *cmd)
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{
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struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
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struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
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__u8 i, j;
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j = 0;
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while (j < 7*cmd->cmd_num) {
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for (i = 0; i < 7; i++)
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report->field[0]->value[i] = cmd->cmd[j++];
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hid_hw_request(hid, report, HID_REQ_SET_REPORT);
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}
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}
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/* Read current range and display it in terminal */
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static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hid_device *hid = to_hid_device(dev);
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struct lg4ff_device_entry *entry;
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struct lg_drv_data *drv_data;
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size_t count;
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drv_data = hid_get_drvdata(hid);
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if (!drv_data) {
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hid_err(hid, "Private driver data not found!\n");
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return 0;
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}
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entry = drv_data->device_props;
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if (!entry) {
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hid_err(hid, "Device properties not found!\n");
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return 0;
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}
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count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->range);
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return count;
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}
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/* Set range to user specified value, call appropriate function
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* according to the type of the wheel */
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static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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struct hid_device *hid = to_hid_device(dev);
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struct lg4ff_device_entry *entry;
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struct lg_drv_data *drv_data;
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__u16 range = simple_strtoul(buf, NULL, 10);
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drv_data = hid_get_drvdata(hid);
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if (!drv_data) {
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hid_err(hid, "Private driver data not found!\n");
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return -EINVAL;
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}
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entry = drv_data->device_props;
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|
if (!entry) {
|
|
hid_err(hid, "Device properties not found!\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (range == 0)
|
|
range = entry->max_range;
|
|
|
|
/* Check if the wheel supports range setting
|
|
* and that the range is within limits for the wheel */
|
|
if (entry->set_range != NULL && range >= entry->min_range && range <= entry->max_range) {
|
|
entry->set_range(hid, range);
|
|
entry->range = range;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
#ifdef CONFIG_LEDS_CLASS
|
|
static void lg4ff_set_leds(struct hid_device *hid, __u8 leds)
|
|
{
|
|
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
|
|
struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
|
|
__s32 *value = report->field[0]->value;
|
|
|
|
value[0] = 0xf8;
|
|
value[1] = 0x12;
|
|
value[2] = leds;
|
|
value[3] = 0x00;
|
|
value[4] = 0x00;
|
|
value[5] = 0x00;
|
|
value[6] = 0x00;
|
|
hid_hw_request(hid, report, HID_REQ_SET_REPORT);
|
|
}
|
|
|
|
static void lg4ff_led_set_brightness(struct led_classdev *led_cdev,
|
|
enum led_brightness value)
|
|
{
|
|
struct device *dev = led_cdev->dev->parent;
|
|
struct hid_device *hid = container_of(dev, struct hid_device, dev);
|
|
struct lg_drv_data *drv_data = hid_get_drvdata(hid);
|
|
struct lg4ff_device_entry *entry;
|
|
int i, state = 0;
|
|
|
|
if (!drv_data) {
|
|
hid_err(hid, "Device data not found.");
|
|
return;
|
|
}
|
|
|
|
entry = (struct lg4ff_device_entry *)drv_data->device_props;
|
|
|
|
if (!entry) {
|
|
hid_err(hid, "Device properties not found.");
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < 5; i++) {
|
|
if (led_cdev != entry->led[i])
|
|
continue;
|
|
state = (entry->led_state >> i) & 1;
|
|
if (value == LED_OFF && state) {
|
|
entry->led_state &= ~(1 << i);
|
|
lg4ff_set_leds(hid, entry->led_state);
|
|
} else if (value != LED_OFF && !state) {
|
|
entry->led_state |= 1 << i;
|
|
lg4ff_set_leds(hid, entry->led_state);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cdev)
|
|
{
|
|
struct device *dev = led_cdev->dev->parent;
|
|
struct hid_device *hid = container_of(dev, struct hid_device, dev);
|
|
struct lg_drv_data *drv_data = hid_get_drvdata(hid);
|
|
struct lg4ff_device_entry *entry;
|
|
int i, value = 0;
|
|
|
|
if (!drv_data) {
|
|
hid_err(hid, "Device data not found.");
|
|
return LED_OFF;
|
|
}
|
|
|
|
entry = (struct lg4ff_device_entry *)drv_data->device_props;
|
|
|
|
if (!entry) {
|
|
hid_err(hid, "Device properties not found.");
|
|
return LED_OFF;
|
|
}
|
|
|
|
for (i = 0; i < 5; i++)
|
|
if (led_cdev == entry->led[i]) {
|
|
value = (entry->led_state >> i) & 1;
|
|
break;
|
|
}
|
|
|
|
return value ? LED_FULL : LED_OFF;
|
|
}
|
|
#endif
|
|
|
|
int lg4ff_init(struct hid_device *hid)
|
|
{
|
|
struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
|
|
struct input_dev *dev = hidinput->input;
|
|
struct lg4ff_device_entry *entry;
|
|
struct lg_drv_data *drv_data;
|
|
struct usb_device_descriptor *udesc;
|
|
int error, i, j;
|
|
__u16 bcdDevice, rev_maj, rev_min;
|
|
|
|
/* Check that the report looks ok */
|
|
if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7))
|
|
return -1;
|
|
|
|
/* Check what wheel has been connected */
|
|
for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) {
|
|
if (hid->product == lg4ff_devices[i].product_id) {
|
|
dbg_hid("Found compatible device, product ID %04X\n", lg4ff_devices[i].product_id);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (i == ARRAY_SIZE(lg4ff_devices)) {
|
|
hid_err(hid, "Device is not supported by lg4ff driver. If you think it should be, consider reporting a bug to"
|
|
"LKML, Simon Wood <simon@mungewell.org> or Michal Maly <madcatxster@gmail.com>\n");
|
|
return -1;
|
|
}
|
|
|
|
/* Attempt to switch wheel to native mode when applicable */
|
|
udesc = &(hid_to_usb_dev(hid)->descriptor);
|
|
if (!udesc) {
|
|
hid_err(hid, "NULL USB device descriptor\n");
|
|
return -1;
|
|
}
|
|
bcdDevice = le16_to_cpu(udesc->bcdDevice);
|
|
rev_maj = bcdDevice >> 8;
|
|
rev_min = bcdDevice & 0xff;
|
|
|
|
if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_WHEEL) {
|
|
dbg_hid("Generic wheel detected, can it do native?\n");
|
|
dbg_hid("USB revision: %2x.%02x\n", rev_maj, rev_min);
|
|
|
|
for (j = 0; j < ARRAY_SIZE(lg4ff_revs); j++) {
|
|
if (lg4ff_revs[j].rev_maj == rev_maj && lg4ff_revs[j].rev_min == rev_min) {
|
|
hid_lg4ff_switch_native(hid, lg4ff_revs[j].command);
|
|
hid_info(hid, "Switched to native mode\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Set supported force feedback capabilities */
|
|
for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++)
|
|
set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit);
|
|
|
|
error = input_ff_create_memless(dev, NULL, hid_lg4ff_play);
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
/* Get private driver data */
|
|
drv_data = hid_get_drvdata(hid);
|
|
if (!drv_data) {
|
|
hid_err(hid, "Cannot add device, private driver data not allocated\n");
|
|
return -1;
|
|
}
|
|
|
|
/* Initialize device properties */
|
|
entry = kzalloc(sizeof(struct lg4ff_device_entry), GFP_KERNEL);
|
|
if (!entry) {
|
|
hid_err(hid, "Cannot add device, insufficient memory to allocate device properties.\n");
|
|
return -ENOMEM;
|
|
}
|
|
drv_data->device_props = entry;
|
|
|
|
entry->product_id = lg4ff_devices[i].product_id;
|
|
entry->min_range = lg4ff_devices[i].min_range;
|
|
entry->max_range = lg4ff_devices[i].max_range;
|
|
entry->set_range = lg4ff_devices[i].set_range;
|
|
|
|
/* Check if autocentering is available and
|
|
* set the centering force to zero by default */
|
|
if (test_bit(FF_AUTOCENTER, dev->ffbit)) {
|
|
if (rev_maj == FFEX_REV_MAJ && rev_min == FFEX_REV_MIN) /* Formula Force EX expects different autocentering command */
|
|
dev->ff->set_autocenter = hid_lg4ff_set_autocenter_ffex;
|
|
else
|
|
dev->ff->set_autocenter = hid_lg4ff_set_autocenter_default;
|
|
|
|
dev->ff->set_autocenter(dev, 0);
|
|
}
|
|
|
|
/* Create sysfs interface */
|
|
error = device_create_file(&hid->dev, &dev_attr_range);
|
|
if (error)
|
|
return error;
|
|
dbg_hid("sysfs interface created\n");
|
|
|
|
/* Set the maximum range to start with */
|
|
entry->range = entry->max_range;
|
|
if (entry->set_range != NULL)
|
|
entry->set_range(hid, entry->range);
|
|
|
|
#ifdef CONFIG_LEDS_CLASS
|
|
/* register led subsystem - G27 only */
|
|
entry->led_state = 0;
|
|
for (j = 0; j < 5; j++)
|
|
entry->led[j] = NULL;
|
|
|
|
if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G27_WHEEL) {
|
|
struct led_classdev *led;
|
|
size_t name_sz;
|
|
char *name;
|
|
|
|
lg4ff_set_leds(hid, 0);
|
|
|
|
name_sz = strlen(dev_name(&hid->dev)) + 8;
|
|
|
|
for (j = 0; j < 5; j++) {
|
|
led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
|
|
if (!led) {
|
|
hid_err(hid, "can't allocate memory for LED %d\n", j);
|
|
goto err;
|
|
}
|
|
|
|
name = (void *)(&led[1]);
|
|
snprintf(name, name_sz, "%s::RPM%d", dev_name(&hid->dev), j+1);
|
|
led->name = name;
|
|
led->brightness = 0;
|
|
led->max_brightness = 1;
|
|
led->brightness_get = lg4ff_led_get_brightness;
|
|
led->brightness_set = lg4ff_led_set_brightness;
|
|
|
|
entry->led[j] = led;
|
|
error = led_classdev_register(&hid->dev, led);
|
|
|
|
if (error) {
|
|
hid_err(hid, "failed to register LED %d. Aborting.\n", j);
|
|
err:
|
|
/* Deregister LEDs (if any) */
|
|
for (j = 0; j < 5; j++) {
|
|
led = entry->led[j];
|
|
entry->led[j] = NULL;
|
|
if (!led)
|
|
continue;
|
|
led_classdev_unregister(led);
|
|
kfree(led);
|
|
}
|
|
goto out; /* Let the driver continue without LEDs */
|
|
}
|
|
}
|
|
}
|
|
out:
|
|
#endif
|
|
hid_info(hid, "Force feedback support for Logitech Gaming Wheels\n");
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
int lg4ff_deinit(struct hid_device *hid)
|
|
{
|
|
struct lg4ff_device_entry *entry;
|
|
struct lg_drv_data *drv_data;
|
|
|
|
device_remove_file(&hid->dev, &dev_attr_range);
|
|
|
|
drv_data = hid_get_drvdata(hid);
|
|
if (!drv_data) {
|
|
hid_err(hid, "Error while deinitializing device, no private driver data.\n");
|
|
return -1;
|
|
}
|
|
entry = drv_data->device_props;
|
|
if (!entry) {
|
|
hid_err(hid, "Error while deinitializing device, no device properties data.\n");
|
|
return -1;
|
|
}
|
|
|
|
#ifdef CONFIG_LEDS_CLASS
|
|
{
|
|
int j;
|
|
struct led_classdev *led;
|
|
|
|
/* Deregister LEDs (if any) */
|
|
for (j = 0; j < 5; j++) {
|
|
|
|
led = entry->led[j];
|
|
entry->led[j] = NULL;
|
|
if (!led)
|
|
continue;
|
|
led_classdev_unregister(led);
|
|
kfree(led);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Deallocate memory */
|
|
kfree(entry);
|
|
|
|
dbg_hid("Device successfully unregistered\n");
|
|
return 0;
|
|
}
|