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![Thomas Meyer](/assets/img/avatar_default.png)
Casting (void *) value returned by kmalloc is useless as mentioned in Documentation/CodingStyle, Chap 14. The semantic patch that makes this change is available in scripts/coccinelle/api/alloc/drop_kmalloc_cast.cocci. Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
488 lines
15 KiB
C
488 lines
15 KiB
C
/*
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* Force feedback support for Logitech Speed Force Wireless
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*
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* http://wiibrew.org/wiki/Logitech_USB_steering_wheel
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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 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 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_IRWXO, lg4ff_range_show, lg4ff_range_store);
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static bool list_inited;
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struct lg4ff_device_entry {
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char *device_id; /* Use name in respective kobject structure's address as the 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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__u8 leds;
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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 struct lg4ff_device_entry device_list;
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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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{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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};
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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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int x;
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#define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
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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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report->field[0]->value[0] = 0x11; /* Slot 1 */
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report->field[0]->value[1] = 0x08;
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report->field[0]->value[2] = x;
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report->field[0]->value[3] = 0x80;
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report->field[0]->value[4] = 0x00;
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report->field[0]->value[5] = 0x00;
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report->field[0]->value[6] = 0x00;
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usbhid_submit_report(hid, report, USB_DIR_OUT);
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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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report->field[0]->value[0] = 0xfe;
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report->field[0]->value[1] = 0x0d;
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report->field[0]->value[2] = magnitude >> 13;
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report->field[0]->value[3] = magnitude >> 13;
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report->field[0]->value[4] = magnitude >> 8;
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report->field[0]->value[5] = 0x00;
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report->field[0]->value[6] = 0x00;
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usbhid_submit_report(hid, report, USB_DIR_OUT);
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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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magnitude = magnitude * 90 / 65535;
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report->field[0]->value[0] = 0xfe;
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report->field[0]->value[1] = 0x03;
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report->field[0]->value[2] = magnitude >> 14;
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report->field[0]->value[3] = magnitude >> 14;
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report->field[0]->value[4] = magnitude;
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report->field[0]->value[5] = 0x00;
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report->field[0]->value[6] = 0x00;
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usbhid_submit_report(hid, report, USB_DIR_OUT);
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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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dbg_hid("G25/G27/DFGT: setting range to %u\n", range);
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report->field[0]->value[0] = 0xf8;
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report->field[0]->value[1] = 0x81;
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report->field[0]->value[2] = range & 0x00ff;
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report->field[0]->value[3] = (range & 0xff00) >> 8;
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report->field[0]->value[4] = 0x00;
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report->field[0]->value[5] = 0x00;
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report->field[0]->value[6] = 0x00;
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usbhid_submit_report(hid, report, USB_DIR_OUT);
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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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dbg_hid("Driving Force Pro: setting range to %u\n", range);
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/* Prepare "coarse" limit command */
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report->field[0]->value[0] = 0xf8;
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report->field[0]->value[1] = 0x00; /* Set later */
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report->field[0]->value[2] = 0x00;
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report->field[0]->value[3] = 0x00;
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report->field[0]->value[4] = 0x00;
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report->field[0]->value[5] = 0x00;
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report->field[0]->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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usbhid_submit_report(hid, report, USB_DIR_OUT);
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/* Prepare "fine" limit command */
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report->field[0]->value[0] = 0x81;
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report->field[0]->value[1] = 0x0b;
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report->field[0]->value[2] = 0x00;
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report->field[0]->value[3] = 0x00;
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report->field[0]->value[4] = 0x00;
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report->field[0]->value[5] = 0x00;
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report->field[0]->value[6] = 0x00;
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if (range == 200 || range == 900) { /* Do not apply any fine limit */
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usbhid_submit_report(hid, report, USB_DIR_OUT);
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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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report->field[0]->value[2] = start_left >> 4;
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report->field[0]->value[3] = start_right >> 4;
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report->field[0]->value[4] = 0xff;
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report->field[0]->value[5] = (start_right & 0xe) << 4 | (start_left & 0xe);
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report->field[0]->value[6] = 0xff;
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usbhid_submit_report(hid, report, USB_DIR_OUT);
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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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usbhid_submit_report(hid, report, USB_DIR_OUT);
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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 lg4ff_device_entry *uninitialized_var(entry);
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struct list_head *h;
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struct hid_device *hid = to_hid_device(dev);
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size_t count;
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list_for_each(h, &device_list.list) {
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entry = list_entry(h, struct lg4ff_device_entry, list);
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if (strcmp(entry->device_id, (&hid->dev)->kobj.name) == 0)
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break;
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}
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if (h == &device_list.list) {
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dbg_hid("Device not found!");
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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 lg4ff_device_entry *uninitialized_var(entry);
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struct list_head *h;
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struct hid_device *hid = to_hid_device(dev);
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__u16 range = simple_strtoul(buf, NULL, 10);
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list_for_each(h, &device_list.list) {
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entry = list_entry(h, struct lg4ff_device_entry, list);
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if (strcmp(entry->device_id, (&hid->dev)->kobj.name) == 0)
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break;
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}
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if (h == &device_list.list) {
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dbg_hid("Device not found!");
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return count;
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}
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if (range == 0)
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range = entry->max_range;
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/* Check if the wheel supports range setting
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* and that the range is within limits for the wheel */
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if (entry->set_range != NULL && range >= entry->min_range && range <= entry->max_range) {
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entry->set_range(hid, range);
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entry->range = range;
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}
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return count;
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}
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int lg4ff_init(struct hid_device *hid)
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{
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struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
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struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
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struct input_dev *dev = hidinput->input;
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struct hid_report *report;
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struct hid_field *field;
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struct lg4ff_device_entry *entry;
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struct usb_device_descriptor *udesc;
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int error, i, j;
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__u16 bcdDevice, rev_maj, rev_min;
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/* Find the report to use */
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if (list_empty(report_list)) {
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hid_err(hid, "No output report found\n");
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return -1;
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}
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/* Check that the report looks ok */
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report = list_entry(report_list->next, struct hid_report, list);
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if (!report) {
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hid_err(hid, "NULL output report\n");
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return -1;
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}
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field = report->field[0];
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if (!field) {
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hid_err(hid, "NULL field\n");
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return -1;
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}
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/* Check what wheel has been connected */
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for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) {
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if (hid->product == lg4ff_devices[i].product_id) {
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dbg_hid("Found compatible device, product ID %04X\n", lg4ff_devices[i].product_id);
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break;
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}
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}
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if (i == ARRAY_SIZE(lg4ff_devices)) {
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hid_err(hid, "Device is not supported by lg4ff driver. If you think it should be, consider reporting a bug to"
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"LKML, Simon Wood <simon@mungewell.org> or Michal Maly <madcatxster@gmail.com>\n");
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return -1;
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}
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/* Attempt to switch wheel to native mode when applicable */
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udesc = &(hid_to_usb_dev(hid)->descriptor);
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if (!udesc) {
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hid_err(hid, "NULL USB device descriptor\n");
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return -1;
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}
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bcdDevice = le16_to_cpu(udesc->bcdDevice);
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rev_maj = bcdDevice >> 8;
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rev_min = bcdDevice & 0xff;
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if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_WHEEL) {
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dbg_hid("Generic wheel detected, can it do native?\n");
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dbg_hid("USB revision: %2x.%02x\n", rev_maj, rev_min);
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for (j = 0; j < ARRAY_SIZE(lg4ff_revs); j++) {
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if (lg4ff_revs[j].rev_maj == rev_maj && lg4ff_revs[j].rev_min == rev_min) {
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hid_lg4ff_switch_native(hid, lg4ff_revs[j].command);
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hid_info(hid, "Switched to native mode\n");
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}
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}
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}
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/* Set supported force feedback capabilities */
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for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++)
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set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit);
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error = input_ff_create_memless(dev, NULL, hid_lg4ff_play);
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if (error)
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return error;
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/* Check if autocentering is available and
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* set the centering force to zero by default */
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if (test_bit(FF_AUTOCENTER, dev->ffbit)) {
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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);
|
|
}
|
|
|
|
/* Initialize device_list if this is the first device to handle by lg4ff */
|
|
if (!list_inited) {
|
|
INIT_LIST_HEAD(&device_list.list);
|
|
list_inited = 1;
|
|
}
|
|
|
|
/* Add the device to device_list */
|
|
entry = kzalloc(sizeof(struct lg4ff_device_entry), GFP_KERNEL);
|
|
if (!entry) {
|
|
hid_err(hid, "Cannot add device, insufficient memory.\n");
|
|
return -ENOMEM;
|
|
}
|
|
entry->device_id = kstrdup((&hid->dev)->kobj.name, GFP_KERNEL);
|
|
if (!entry->device_id) {
|
|
hid_err(hid, "Cannot set device_id, insufficient memory.\n");
|
|
kfree(entry);
|
|
return -ENOMEM;
|
|
}
|
|
entry->min_range = lg4ff_devices[i].min_range;
|
|
entry->max_range = lg4ff_devices[i].max_range;
|
|
entry->set_range = lg4ff_devices[i].set_range;
|
|
list_add(&entry->list, &device_list.list);
|
|
|
|
/* 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);
|
|
|
|
hid_info(hid, "Force feedback for Logitech Speed Force Wireless by Simon Wood <simon@mungewell.org>\n");
|
|
return 0;
|
|
}
|
|
|
|
int lg4ff_deinit(struct hid_device *hid)
|
|
{
|
|
bool found = 0;
|
|
struct lg4ff_device_entry *entry;
|
|
struct list_head *h, *g;
|
|
list_for_each_safe(h, g, &device_list.list) {
|
|
entry = list_entry(h, struct lg4ff_device_entry, list);
|
|
if (strcmp(entry->device_id, (&hid->dev)->kobj.name) == 0) {
|
|
list_del(h);
|
|
kfree(entry->device_id);
|
|
kfree(entry);
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found) {
|
|
dbg_hid("Device entry not found!\n");
|
|
return -1;
|
|
}
|
|
|
|
device_remove_file(&hid->dev, &dev_attr_range);
|
|
dbg_hid("Device successfully unregistered\n");
|
|
return 0;
|
|
}
|