![Dmitry Torokhov](/assets/img/avatar_default.png)
Input: convert drivers/iusb/input to dynamic input_dev allocation This is required for input_dev sysfs integration Signed-off-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
526 lines
14 KiB
C
526 lines
14 KiB
C
/*
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* $$
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*
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* Force feedback support for hid-compliant for some of the devices from
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* Logitech, namely:
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* - WingMan Cordless RumblePad
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* - WingMan Force 3D
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*
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* Copyright (c) 2002-2004 Johann Deneux
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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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* Should you need to contact me, the author, you can do so by
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* e-mail - mail your message to <johann.deneux@it.uu.se>
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*/
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#include <linux/input.h>
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#include <linux/sched.h>
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//#define DEBUG
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#include <linux/usb.h>
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#include <linux/circ_buf.h>
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#include "hid.h"
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#include "fixp-arith.h"
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/* Periodicity of the update */
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#define PERIOD (HZ/10)
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#define RUN_AT(t) (jiffies + (t))
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/* Effect status */
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#define EFFECT_STARTED 0 /* Effect is going to play after some time
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(ff_replay.delay) */
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#define EFFECT_PLAYING 1 /* Effect is being played */
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#define EFFECT_USED 2
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// For lgff_device::flags
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#define DEVICE_CLOSING 0 /* The driver is being unitialised */
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/* Check that the current process can access an effect */
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#define CHECK_OWNERSHIP(effect) (current->pid == 0 \
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|| effect.owner == current->pid)
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#define LGFF_CHECK_OWNERSHIP(i, l) \
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(i>=0 && i<LGFF_EFFECTS \
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&& test_bit(EFFECT_USED, l->effects[i].flags) \
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&& CHECK_OWNERSHIP(l->effects[i]))
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#define LGFF_EFFECTS 8
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struct device_type {
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u16 idVendor;
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u16 idProduct;
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signed short *ff;
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};
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struct lgff_effect {
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pid_t owner;
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struct ff_effect effect;
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unsigned long flags[1];
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unsigned int count; /* Number of times left to play */
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unsigned long started_at; /* When the effect started to play */
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};
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struct lgff_device {
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struct hid_device* hid;
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struct hid_report* constant;
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struct hid_report* rumble;
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struct hid_report* condition;
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struct lgff_effect effects[LGFF_EFFECTS];
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spinlock_t lock; /* device-level lock. Having locks on
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a per-effect basis could be nice, but
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isn't really necessary */
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unsigned long flags[1]; /* Contains various information about the
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state of the driver for this device */
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struct timer_list timer;
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};
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/* Callbacks */
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static void hid_lgff_exit(struct hid_device* hid);
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static int hid_lgff_event(struct hid_device *hid, struct input_dev *input,
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unsigned int type, unsigned int code, int value);
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static int hid_lgff_flush(struct input_dev *input, struct file *file);
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static int hid_lgff_upload_effect(struct input_dev *input,
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struct ff_effect *effect);
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static int hid_lgff_erase(struct input_dev *input, int id);
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/* Local functions */
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static void hid_lgff_input_init(struct hid_device* hid);
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static void hid_lgff_timer(unsigned long timer_data);
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static struct hid_report* hid_lgff_duplicate_report(struct hid_report*);
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static void hid_lgff_delete_report(struct hid_report*);
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static signed short ff_rumble[] = {
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FF_RUMBLE,
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-1
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};
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static signed short ff_joystick[] = {
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FF_CONSTANT,
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-1
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};
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static struct device_type devices[] = {
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{0x046d, 0xc211, ff_rumble},
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{0x046d, 0xc219, ff_rumble},
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{0x046d, 0xc283, ff_joystick},
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{0x0000, 0x0000, ff_joystick}
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};
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int hid_lgff_init(struct hid_device* hid)
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{
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struct lgff_device *private;
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struct hid_report* report;
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struct hid_field* field;
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/* Find the report to use */
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if (list_empty(&hid->report_enum[HID_OUTPUT_REPORT].report_list)) {
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err("No output report found");
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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 = (struct hid_report*)hid->report_enum[HID_OUTPUT_REPORT].report_list.next;
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if (!report) {
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err("NULL output report");
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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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err("NULL field");
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return -1;
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}
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private = kmalloc(sizeof(struct lgff_device), GFP_KERNEL);
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if (!private)
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return -1;
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memset(private, 0, sizeof(struct lgff_device));
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hid->ff_private = private;
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/* Input init */
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hid_lgff_input_init(hid);
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private->constant = hid_lgff_duplicate_report(report);
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if (!private->constant) {
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kfree(private);
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return -1;
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}
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private->constant->field[0]->value[0] = 0x51;
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private->constant->field[0]->value[1] = 0x08;
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private->constant->field[0]->value[2] = 0x7f;
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private->constant->field[0]->value[3] = 0x7f;
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private->rumble = hid_lgff_duplicate_report(report);
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if (!private->rumble) {
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hid_lgff_delete_report(private->constant);
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kfree(private);
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return -1;
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}
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private->rumble->field[0]->value[0] = 0x42;
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private->condition = hid_lgff_duplicate_report(report);
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if (!private->condition) {
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hid_lgff_delete_report(private->rumble);
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hid_lgff_delete_report(private->constant);
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kfree(private);
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return -1;
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}
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private->hid = hid;
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spin_lock_init(&private->lock);
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init_timer(&private->timer);
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private->timer.data = (unsigned long)private;
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private->timer.function = hid_lgff_timer;
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/* Event and exit callbacks */
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hid->ff_exit = hid_lgff_exit;
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hid->ff_event = hid_lgff_event;
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/* Start the update task */
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private->timer.expires = RUN_AT(PERIOD);
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add_timer(&private->timer); /*TODO: only run the timer when at least
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one effect is playing */
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printk(KERN_INFO "Force feedback for Logitech force feedback devices by Johann Deneux <johann.deneux@it.uu.se>\n");
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return 0;
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}
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static struct hid_report* hid_lgff_duplicate_report(struct hid_report* report)
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{
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struct hid_report* ret;
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ret = kmalloc(sizeof(struct lgff_device), GFP_KERNEL);
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if (!ret)
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return NULL;
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*ret = *report;
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ret->field[0] = kmalloc(sizeof(struct hid_field), GFP_KERNEL);
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if (!ret->field[0]) {
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kfree(ret);
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return NULL;
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}
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*ret->field[0] = *report->field[0];
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ret->field[0]->value = kmalloc(sizeof(s32[8]), GFP_KERNEL);
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if (!ret->field[0]->value) {
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kfree(ret->field[0]);
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kfree(ret);
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return NULL;
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}
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memset(ret->field[0]->value, 0, sizeof(s32[8]));
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return ret;
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}
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static void hid_lgff_delete_report(struct hid_report* report)
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{
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if (report) {
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kfree(report->field[0]->value);
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kfree(report->field[0]);
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kfree(report);
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}
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}
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static void hid_lgff_input_init(struct hid_device* hid)
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{
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struct device_type* dev = devices;
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signed short* ff;
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u16 idVendor = le16_to_cpu(hid->dev->descriptor.idVendor);
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u16 idProduct = le16_to_cpu(hid->dev->descriptor.idProduct);
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struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
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struct input_dev *input_dev = hidinput->input;
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while (dev->idVendor && (idVendor != dev->idVendor || idProduct != dev->idProduct))
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dev++;
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for (ff = dev->ff; *ff >= 0; ff++)
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set_bit(*ff, input_dev->ffbit);
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input_dev->upload_effect = hid_lgff_upload_effect;
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input_dev->flush = hid_lgff_flush;
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set_bit(EV_FF, input_dev->evbit);
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input_dev->ff_effects_max = LGFF_EFFECTS;
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}
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static void hid_lgff_exit(struct hid_device* hid)
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{
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struct lgff_device *lgff = hid->ff_private;
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set_bit(DEVICE_CLOSING, lgff->flags);
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del_timer_sync(&lgff->timer);
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hid_lgff_delete_report(lgff->condition);
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hid_lgff_delete_report(lgff->rumble);
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hid_lgff_delete_report(lgff->constant);
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kfree(lgff);
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}
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static int hid_lgff_event(struct hid_device *hid, struct input_dev* input,
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unsigned int type, unsigned int code, int value)
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{
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struct lgff_device *lgff = hid->ff_private;
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struct lgff_effect *effect = lgff->effects + code;
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unsigned long flags;
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if (type != EV_FF) return -EINVAL;
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if (!LGFF_CHECK_OWNERSHIP(code, lgff)) return -EACCES;
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if (value < 0) return -EINVAL;
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spin_lock_irqsave(&lgff->lock, flags);
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if (value > 0) {
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if (test_bit(EFFECT_STARTED, effect->flags)) {
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spin_unlock_irqrestore(&lgff->lock, flags);
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return -EBUSY;
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}
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if (test_bit(EFFECT_PLAYING, effect->flags)) {
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spin_unlock_irqrestore(&lgff->lock, flags);
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return -EBUSY;
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}
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effect->count = value;
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if (effect->effect.replay.delay) {
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set_bit(EFFECT_STARTED, effect->flags);
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} else {
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set_bit(EFFECT_PLAYING, effect->flags);
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}
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effect->started_at = jiffies;
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}
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else { /* value == 0 */
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clear_bit(EFFECT_STARTED, effect->flags);
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clear_bit(EFFECT_PLAYING, effect->flags);
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}
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spin_unlock_irqrestore(&lgff->lock, flags);
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return 0;
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}
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/* Erase all effects this process owns */
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static int hid_lgff_flush(struct input_dev *dev, struct file *file)
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{
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struct hid_device *hid = dev->private;
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struct lgff_device *lgff = hid->ff_private;
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int i;
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for (i=0; i<dev->ff_effects_max; ++i) {
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/*NOTE: no need to lock here. The only times EFFECT_USED is
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modified is when effects are uploaded or when an effect is
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erased. But a process cannot close its dev/input/eventX fd
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and perform ioctls on the same fd all at the same time */
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if ( current->pid == lgff->effects[i].owner
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&& test_bit(EFFECT_USED, lgff->effects[i].flags)) {
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if (hid_lgff_erase(dev, i))
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warn("erase effect %d failed", i);
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}
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}
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return 0;
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}
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static int hid_lgff_erase(struct input_dev *dev, int id)
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{
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struct hid_device *hid = dev->private;
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struct lgff_device *lgff = hid->ff_private;
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unsigned long flags;
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if (!LGFF_CHECK_OWNERSHIP(id, lgff)) return -EACCES;
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spin_lock_irqsave(&lgff->lock, flags);
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lgff->effects[id].flags[0] = 0;
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spin_unlock_irqrestore(&lgff->lock, flags);
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return 0;
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}
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static int hid_lgff_upload_effect(struct input_dev* input,
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struct ff_effect* effect)
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{
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struct hid_device *hid = input->private;
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struct lgff_device *lgff = hid->ff_private;
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struct lgff_effect new;
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int id;
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unsigned long flags;
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dbg("ioctl rumble");
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if (!test_bit(effect->type, input->ffbit)) return -EINVAL;
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spin_lock_irqsave(&lgff->lock, flags);
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if (effect->id == -1) {
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int i;
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for (i=0; i<LGFF_EFFECTS && test_bit(EFFECT_USED, lgff->effects[i].flags); ++i);
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if (i >= LGFF_EFFECTS) {
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spin_unlock_irqrestore(&lgff->lock, flags);
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return -ENOSPC;
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}
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effect->id = i;
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lgff->effects[i].owner = current->pid;
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lgff->effects[i].flags[0] = 0;
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set_bit(EFFECT_USED, lgff->effects[i].flags);
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}
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else if (!LGFF_CHECK_OWNERSHIP(effect->id, lgff)) {
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spin_unlock_irqrestore(&lgff->lock, flags);
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return -EACCES;
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}
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id = effect->id;
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new = lgff->effects[id];
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new.effect = *effect;
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if (test_bit(EFFECT_STARTED, lgff->effects[id].flags)
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|| test_bit(EFFECT_STARTED, lgff->effects[id].flags)) {
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/* Changing replay parameters is not allowed (for the time
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being) */
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if (new.effect.replay.delay != lgff->effects[id].effect.replay.delay
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|| new.effect.replay.length != lgff->effects[id].effect.replay.length) {
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spin_unlock_irqrestore(&lgff->lock, flags);
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return -ENOSYS;
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}
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lgff->effects[id] = new;
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} else {
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lgff->effects[id] = new;
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}
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spin_unlock_irqrestore(&lgff->lock, flags);
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return 0;
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}
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static void hid_lgff_timer(unsigned long timer_data)
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{
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struct lgff_device *lgff = (struct lgff_device*)timer_data;
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struct hid_device *hid = lgff->hid;
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unsigned long flags;
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int x = 0x7f, y = 0x7f; // Coordinates of constant effects
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unsigned int left = 0, right = 0; // Rumbling
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int i;
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spin_lock_irqsave(&lgff->lock, flags);
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for (i=0; i<LGFF_EFFECTS; ++i) {
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struct lgff_effect* effect = lgff->effects +i;
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if (test_bit(EFFECT_PLAYING, effect->flags)) {
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switch (effect->effect.type) {
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case FF_CONSTANT: {
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//TODO: handle envelopes
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int degrees = effect->effect.direction * 360 >> 16;
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x += fixp_mult(fixp_sin(degrees),
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fixp_new16(effect->effect.u.constant.level));
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y += fixp_mult(-fixp_cos(degrees),
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fixp_new16(effect->effect.u.constant.level));
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} break;
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case FF_RUMBLE:
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right += effect->effect.u.rumble.strong_magnitude;
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left += effect->effect.u.rumble.weak_magnitude;
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break;
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};
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/* One run of the effect is finished playing */
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if (time_after(jiffies,
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effect->started_at
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+ effect->effect.replay.delay*HZ/1000
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+ effect->effect.replay.length*HZ/1000)) {
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dbg("Finished playing once %d", i);
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if (--effect->count <= 0) {
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dbg("Stopped %d", i);
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clear_bit(EFFECT_PLAYING, effect->flags);
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}
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else {
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dbg("Start again %d", i);
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if (effect->effect.replay.length != 0) {
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clear_bit(EFFECT_PLAYING, effect->flags);
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set_bit(EFFECT_STARTED, effect->flags);
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}
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effect->started_at = jiffies;
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}
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}
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} else if (test_bit(EFFECT_STARTED, lgff->effects[i].flags)) {
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/* Check if we should start playing the effect */
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if (time_after(jiffies,
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lgff->effects[i].started_at
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+ lgff->effects[i].effect.replay.delay*HZ/1000)) {
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dbg("Now playing %d", i);
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clear_bit(EFFECT_STARTED, lgff->effects[i].flags);
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set_bit(EFFECT_PLAYING, lgff->effects[i].flags);
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}
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}
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}
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#define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
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// Clamp values
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CLAMP(x);
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CLAMP(y);
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CLAMP(left);
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CLAMP(right);
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#undef CLAMP
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if (x != lgff->constant->field[0]->value[2]
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|| y != lgff->constant->field[0]->value[3]) {
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lgff->constant->field[0]->value[2] = x;
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lgff->constant->field[0]->value[3] = y;
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dbg("(x,y)=(%04x, %04x)", x, y);
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hid_submit_report(hid, lgff->constant, USB_DIR_OUT);
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}
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if (left != lgff->rumble->field[0]->value[2]
|
|
|| right != lgff->rumble->field[0]->value[3]) {
|
|
lgff->rumble->field[0]->value[2] = left;
|
|
lgff->rumble->field[0]->value[3] = right;
|
|
dbg("(left,right)=(%04x, %04x)", left, right);
|
|
hid_submit_report(hid, lgff->rumble, USB_DIR_OUT);
|
|
}
|
|
|
|
if (!test_bit(DEVICE_CLOSING, lgff->flags)) {
|
|
lgff->timer.expires = RUN_AT(PERIOD);
|
|
add_timer(&lgff->timer);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&lgff->lock, flags);
|
|
}
|