// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Force feedback support for DragonRise Inc . game controllers
*
* From what I have gathered , these devices are mass produced in China and are
* distributed under several vendors . They often share the same design as
* the original PlayStation DualShock controller .
*
* 0079 : 0006 " DragonRise Inc . Generic USB Joystick "
* - tested with a Tesun USB - 703 game controller .
*
* Copyright ( c ) 2009 Richard Walmsley < richwalm @ gmail . com >
*/
/*
*/
#include <linux/input.h>
#include <linux/slab.h>
#include <linux/hid.h>
#include <linux/module.h>
#include "hid-ids.h"
#ifdef CONFIG_DRAGONRISE_FF
struct drff_device {
struct hid_report *report;
};
static int drff_play(struct input_dev *dev, void *data,
struct ff_effect *effect)
{
struct hid_device *hid = input_get_drvdata(dev);
struct drff_device *drff = data;
int strong, weak;
strong = effect->u.rumble.strong_magnitude;
weak = effect->u.rumble.weak_magnitude;
dbg_hid("called with 0x%04x 0x%04x" , strong, weak);
if (strong || weak) {
strong = strong * 0 xff / 0 xffff;
weak = weak * 0 xff / 0 xffff;
/* While reverse engineering this device, I found that when
this value is set , it causes the strong rumble to function
at a near maximum speed, so we'll bypass it. */
if (weak == 0 x0a)
weak = 0 x0b;
drff->report->field[0 ]->value[0 ] = 0 x51;
drff->report->field[0 ]->value[1 ] = 0 x00;
drff->report->field[0 ]->value[2 ] = weak;
drff->report->field[0 ]->value[4 ] = strong;
hid_hw_request(hid, drff->report, HID_REQ_SET_REPORT);
drff->report->field[0 ]->value[0 ] = 0 xfa;
drff->report->field[0 ]->value[1 ] = 0 xfe;
} else {
drff->report->field[0 ]->value[0 ] = 0 xf3;
drff->report->field[0 ]->value[1 ] = 0 x00;
}
drff->report->field[0 ]->value[2 ] = 0 x00;
drff->report->field[0 ]->value[4 ] = 0 x00;
dbg_hid("running with 0x%02x 0x%02x" , strong, weak);
hid_hw_request(hid, drff->report, HID_REQ_SET_REPORT);
return 0 ;
}
static int drff_init(struct hid_device *hid)
{
struct drff_device *drff;
struct hid_report *report;
struct hid_input *hidinput;
struct list_head *report_list =
&hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct input_dev *dev;
int error;
if (list_empty(&hid->inputs)) {
hid_err(hid, "no inputs found\n" );
return -ENODEV;
}
hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
dev = hidinput->input;
if (list_empty(report_list)) {
hid_err(hid, "no output reports found\n" );
return -ENODEV;
}
report = list_first_entry(report_list, struct hid_report, list);
if (report->maxfield < 1 ) {
hid_err(hid, "no fields in the report\n" );
return -ENODEV;
}
if (report->field[0 ]->report_count < 7 ) {
hid_err(hid, "not enough values in the field\n" );
return -ENODEV;
}
drff = kzalloc(sizeof (struct drff_device), GFP_KERNEL);
if (!drff)
return -ENOMEM;
set_bit(FF_RUMBLE, dev->ffbit);
error = input_ff_create_memless(dev, drff, drff_play);
if (error) {
kfree(drff);
return error;
}
drff->report = report;
drff->report->field[0 ]->value[0 ] = 0 xf3;
drff->report->field[0 ]->value[1 ] = 0 x00;
drff->report->field[0 ]->value[2 ] = 0 x00;
drff->report->field[0 ]->value[3 ] = 0 x00;
drff->report->field[0 ]->value[4 ] = 0 x00;
drff->report->field[0 ]->value[5 ] = 0 x00;
drff->report->field[0 ]->value[6 ] = 0 x00;
hid_hw_request(hid, drff->report, HID_REQ_SET_REPORT);
hid_info(hid, "Force Feedback for DragonRise Inc. "
"game controllers by Richard Walmsley <richwalm@gmail.com>\n" );
return 0 ;
}
#else
static inline int drff_init(struct hid_device *hid)
{
return 0 ;
}
#endif
/*
* The original descriptor of joystick with PID 0 x0011 , represented by DVTech PC
* JS19 . It seems both copied from another device and a result of confusion
* either about the specification or about the program used to create the
* descriptor . In any case , it ' s a wonder it works on Windows .
*
* Usage Page ( Desktop ) , ; Generic desktop controls ( 01 h )
* Usage ( Joystick ) , ; Joystick ( 04 h , application collection )
* Collection ( Application ) ,
* Collection ( Logical ) ,
* Report Size ( 8 ) ,
* Report Count ( 5 ) ,
* Logical Minimum ( 0 ) ,
* Logical Maximum ( 255 ) ,
* Physical Minimum ( 0 ) ,
* Physical Maximum ( 255 ) ,
* Usage ( X ) , ; X ( 30 h , dynamic value )
* Usage ( X ) , ; X ( 30 h , dynamic value )
* Usage ( X ) , ; X ( 30 h , dynamic value )
* Usage ( X ) , ; X ( 30 h , dynamic value )
* Usage ( Y ) , ; Y ( 31 h , dynamic value )
* Input ( Variable ) ,
* Report Size ( 4 ) ,
* Report Count ( 1 ) ,
* Logical Maximum ( 7 ) ,
* Physical Maximum ( 315 ) ,
* Unit ( Degrees ) ,
* Usage ( 00 h ) ,
* Input ( Variable , Null State ) ,
* Unit ,
* Report Size ( 1 ) ,
* Report Count ( 10 ) ,
* Logical Maximum ( 1 ) ,
* Physical Maximum ( 1 ) ,
* Usage Page ( Button ) , ; Button ( 09 h )
* Usage Minimum ( 01 h ) ,
* Usage Maximum ( 0 Ah ) ,
* Input ( Variable ) ,
* Usage Page ( FF00h ) , ; FF00h , vendor - defined
* Report Size ( 1 ) ,
* Report Count ( 10 ) ,
* Logical Maximum ( 1 ) ,
* Physical Maximum ( 1 ) ,
* Usage ( 01 h ) ,
* Input ( Variable ) ,
* End Collection ,
* Collection ( Logical ) ,
* Report Size ( 8 ) ,
* Report Count ( 4 ) ,
* Physical Maximum ( 255 ) ,
* Logical Maximum ( 255 ) ,
* Usage ( 02 h ) ,
* Output ( Variable ) ,
* End Collection ,
* End Collection
*/
/* Size of the original descriptor of the PID 0x0011 joystick */
#define PID0011_RDESC_ORIG_SIZE 101
/* Fixed report descriptor for PID 0x011 joystick */
static const __u8 pid0011_rdesc_fixed[] = {
0 x05, 0 x01, /* Usage Page (Desktop), */
0 x09, 0 x04, /* Usage (Joystick), */
0 xA1, 0 x01, /* Collection (Application), */
0 xA1, 0 x02, /* Collection (Logical), */
0 x14, /* Logical Minimum (0), */
0 x75, 0 x08, /* Report Size (8), */
0 x95, 0 x03, /* Report Count (3), */
0 x81, 0 x01, /* Input (Constant), */
0 x26, 0 xFF, 0 x00, /* Logical Maximum (255), */
0 x95, 0 x02, /* Report Count (2), */
0 x09, 0 x30, /* Usage (X), */
0 x09, 0 x31, /* Usage (Y), */
0 x81, 0 x02, /* Input (Variable), */
0 x75, 0 x01, /* Report Size (1), */
0 x95, 0 x04, /* Report Count (4), */
0 x81, 0 x01, /* Input (Constant), */
0 x25, 0 x01, /* Logical Maximum (1), */
0 x95, 0 x0A, /* Report Count (10), */
0 x05, 0 x09, /* Usage Page (Button), */
0 x19, 0 x01, /* Usage Minimum (01h), */
0 x29, 0 x0A, /* Usage Maximum (0Ah), */
0 x81, 0 x02, /* Input (Variable), */
0 x95, 0 x0A, /* Report Count (10), */
0 x81, 0 x01, /* Input (Constant), */
0 xC0, /* End Collection, */
0 xC0 /* End Collection */
};
static const __u8 *dr_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
switch (hdev->product) {
case 0 x0011:
if (*rsize == PID0011_RDESC_ORIG_SIZE) {
*rsize = sizeof (pid0011_rdesc_fixed);
return pid0011_rdesc_fixed;
}
break ;
}
return rdesc;
}
#define map_abs(c) hid_map_usage(hi, usage, bit, max, EV_ABS, (c))
#define map_rel(c) hid_map_usage(hi, usage, bit, max, EV_REL, (c))
static int dr_input_mapping(struct hid_device *hdev, struct hid_input *hi,
struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
switch (usage->hid) {
/*
* revert to the old hid - input behavior where axes
* can be randomly assigned when hid - > usage is reused .
*/
case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
if (field->flags & HID_MAIN_ITEM_RELATIVE)
map_rel(usage->hid & 0 xf);
else
map_abs(usage->hid & 0 xf);
return 1 ;
}
return 0 ;
}
static int dr_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
int ret;
dev_dbg(&hdev->dev, "DragonRise Inc. HID hardware probe..." );
ret = hid_parse(hdev);
if (ret) {
hid_err(hdev, "parse failed\n" );
goto err;
}
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
if (ret) {
hid_err(hdev, "hw start failed\n" );
goto err;
}
switch (hdev->product) {
case 0 x0006:
ret = drff_init(hdev);
if (ret) {
dev_err(&hdev->dev, "force feedback init failed\n" );
hid_hw_stop(hdev);
goto err;
}
break ;
}
return 0 ;
err:
return ret;
}
static const struct hid_device_id dr_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0 x0006), },
{ HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0 x0011), },
{ }
};
MODULE_DEVICE_TABLE(hid, dr_devices);
static struct hid_driver dr_driver = {
.name = "dragonrise" ,
.id_table = dr_devices,
.report_fixup = dr_report_fixup,
.probe = dr_probe,
.input_mapping = dr_input_mapping,
};
module_hid_driver(dr_driver);
MODULE_DESCRIPTION("Force feedback support for DragonRise Inc. game controllers" );
MODULE_LICENSE("GPL" );
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