From 60e90e0a96039c58968de551aadca0fab490d35d Mon Sep 17 00:00:00 2001 From: Kimplul Date: Sat, 12 Mar 2022 18:00:40 +0200 Subject: allow for wheel 'backends' --- hid-tmff2.h | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 hid-tmff2.h (limited to 'hid-tmff2.h') diff --git a/hid-tmff2.h b/hid-tmff2.h new file mode 100644 index 0000000..bdde1a7 --- /dev/null +++ b/hid-tmff2.h @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _HID_TMFF2 +#define _HID_TMFF2 + +#include +#include +#include + +#define USB_VENDOR_ID_THRUSTMASTER 0x044f + +/* the wheel seems to only be capable of processing a certain number of + * interrupts per second, and if this value is too low the kernel urb buffer(or + * some buffer at least) fills up. Optimally I would figure out some way to + * space out the interrupts so that they all leave at regular intervals, but + * for now this is good enough, go slow enough that everything works. + */ +#define DEFAULT_TIMER_PERIOD 8 + +#define FF_EFFECT_QUEUE_UPLOAD 0 +#define FF_EFFECT_QUEUE_START 1 +#define FF_EFFECT_QUEUE_STOP 2 +#define FF_EFFECT_QUEUE_UPDATE 3 +#define FF_EFFECT_PLAYING 4 + +#undef fixp_sin16 +#define fixp_sin16(v) (((v % 360) > 180) ?\ + -(fixp_sin32((v % 360) - 180) >> 16)\ + : fixp_sin32(v) >> 16) + +#define JIFFIES2MS(jiffies) ((jiffies) * 1000 / HZ) + +struct tmff2_effect_state { + struct ff_effect effect; + struct ff_effect old; + + unsigned long flags; + unsigned long count; + unsigned long start_time; +}; + +struct tmff2_device_entry { + struct hid_device *hdev; + struct input_dev *input_dev; + + /* pointer to array */ + struct tmff2_effect_state *states; + + struct delayed_work work; + + spinlock_t lock; + + /* fields relevant to each actual device (T300, T150...) */ + void *data; + unsigned long max_effects; + signed short supported_effects[FF_CNT]; + + /* obligatory callbacks */ + int (*play_effect)(void *data, struct tmff2_effect_state *state); + int (*upload_effect)(void *data, struct tmff2_effect_state *state); + int (*update_effect)(void *data, struct tmff2_effect_state *state); + int (*stop_effect)(void *data, struct tmff2_effect_state *state); + + int (*wheel_init)(void *data); + int (*wheel_destroy)(void *data); + + /* optional callbacks */ + int (*open)(void *data); + int (*close)(void *data); + int (*set_gain)(void *data, uint16_t gain); + int (*set_range)(void *data, uint16_t range); + int (*switch_mode)(void *data, uint16_t mode); + int (*set_autocenter)(void *data, uint16_t autocenter); + __u8 *(*wheel_fixup)(struct hid_device *hdev, __u8 *rdesc, unsigned int *rsize); +}; + +#endif /* _HID_TMFF2 */ -- cgit v1.3