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hid-tmt500rs.c
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hid-tmt500rs.c
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// SPDX-License-Identifier: GPL-2.0
#include "hid-tmt500rs.h"
static int timer_msecs = DEFAULT_TIMER_PERIOD;
module_param(timer_msecs, int, 0660);
MODULE_PARM_DESC(timer_msecs, "Timer resolution in msecs");
static int spring_level = 30;
module_param(spring_level, int, 0);
MODULE_PARM_DESC(spring_level, "Level of spring force (0-100), as per Oversteer standards");
static int damper_level = 30;
module_param(damper_level, int, 0);
MODULE_PARM_DESC(damper_level, "Level of damper force (0-100), as per Oversteer standards");
static int friction_level = 30;
module_param(friction_level, int, 0);
MODULE_PARM_DESC(friction_level, "Level of friction force (0-100), as per Oversteer standards");
static struct t500rs_device_entry *t500rs_get_device(struct hid_device *hdev)
{
struct t500rs_data *drv_data;
struct t500rs_device_entry *t500rs;
spin_lock_irqsave(&lock, lock_flags);
drv_data = hid_get_drvdata(hdev);
if (!drv_data) {
hid_err(hdev, "private data not found\n");
return NULL;
}
t500rs = drv_data->device_props;
if (!t500rs) {
hid_err(hdev, "device properties not found\n");
return NULL;
}
spin_unlock_irqrestore(&lock, lock_flags);
return t500rs;
}
static int t500rs_send_int(struct input_dev *dev, u8 *send_buffer, int *trans)
{
struct hid_device *hdev = input_get_drvdata(dev);
struct t500rs_device_entry *t500rs;
int i;
t500rs = t500rs_get_device(hdev);
if (!t500rs) {
hid_err(hdev, "could not get device\n");
return -1;
}
for (i = 0; i < T500RS_BUFFER_LENGTH; ++i)
t500rs->ff_field->value[i] = send_buffer[i];
hid_hw_request(t500rs->hdev, t500rs->report, HID_REQ_SET_REPORT);
memset(send_buffer, 0, T500RS_BUFFER_LENGTH);
return 0;
}
static void t500rs_int_callback(struct urb *urb){
if(urb->status){
hid_warn(urb->dev, "urb status %i received\n", urb->status);
}
usb_free_urb(urb);
}
static int t500rs_send_custom_int(struct input_dev *dev, u8 *send_buffer, int *trans){
struct hid_device *hdev = input_get_drvdata(dev);
struct t500rs_device_entry *t500rs;
struct usb_device *usbdev;
struct usb_interface *usbif;
struct usb_host_endpoint *ep;
struct urb *urb = usb_alloc_urb(0, GFP_ATOMIC);
t500rs = t500rs_get_device(hdev);
if(!t500rs){
hid_err(hdev, "could not get device\n");
}
usbdev = t500rs->usbdev;
usbif = t500rs->usbif;
ep = &usbif->cur_altsetting->endpoint[1];
usb_fill_int_urb(
urb,
usbdev,
usb_sndintpipe(usbdev, 1),
send_buffer,
T500RS_BUFFER_LENGTH,
t500rs_int_callback,
hdev,
ep->desc.bInterval
);
return usb_submit_urb(urb, GFP_ATOMIC);
}
static int t500rs_play_effect(struct t500rs_device_entry *t500rs,
struct t500rs_effect_state *state)
{
u8 *send_buffer = t500rs->send_buffer;
int ret, trans;
send_buffer[1] = state->effect.id + 1;
send_buffer[2] = 0x89;
send_buffer[3] = 0x01;
ret = t500rs_send_custom_int(t500rs->input_dev, send_buffer, &trans);
if (ret)
hid_err(t500rs->hdev, "failed starting effect play\n");
return ret;
}
static int t500rs_stop_effect(struct t500rs_device_entry *t500rs,
struct t500rs_effect_state *state)
{
u8 *send_buffer = t500rs->send_buffer;
int ret, trans;
send_buffer[1] = state->effect.id + 1;
send_buffer[2] = 0x89;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret)
hid_err(t500rs->hdev, "failed stopping effect play\n");
return ret;
}
static void t500rs_fill_envelope(u8 *send_buffer, int i, s16 level,
u16 duration, struct ff_envelope *envelope)
{
u16 attack_length = (duration * envelope->attack_length) / 0x7fff;
u16 attack_level = (level * envelope->attack_level) / 0x7fff;
u16 fade_length = (duration * envelope->fade_length) / 0x7fff;
u16 fade_level = (level * envelope->fade_level) / 0x7fff;
send_buffer[i + 0] = attack_length & 0xff;
send_buffer[i + 1] = attack_length >> 8;
send_buffer[i + 2] = attack_level & 0xff;
send_buffer[i + 3] = attack_level >> 8;
send_buffer[i + 4] = fade_length & 0xff;
send_buffer[i + 5] = fade_length >> 8;
send_buffer[i + 6] = fade_level & 0xff;
send_buffer[i + 7] = fade_level >> 8;
}
static int t500rs_modify_envelope(struct t500rs_device_entry *t500rs,
struct t500rs_effect_state *state,
u8 *send_buffer,
s16 level,
u16 duration,
u8 id,
struct ff_envelope envelope,
struct ff_envelope envelope_old
)
{
u16 attack_length, attack_level, fade_length, fade_level;
int ret = 0, trans;
if (duration == 0)
duration = 0xffff;
attack_length = (duration * envelope.attack_length) / 0x7fff;
attack_level = (level * envelope.attack_level) / 0x7fff;
fade_length = (duration * envelope.fade_length) / 0x7fff;
fade_level = (level * envelope.fade_level) / 0x7fff;
send_buffer[1] = id + 1;
send_buffer[2] = 0x31;
if (envelope.attack_length != envelope_old.attack_length) {
send_buffer[3] = 0x81;
send_buffer[4] = attack_length & 0xff;
send_buffer[5] = attack_length >> 8;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret) {
hid_err(t500rs->hdev, "failed modifying effect envelope\n");
goto error;
}
}
if (envelope.attack_level != envelope_old.attack_level) {
send_buffer[3] = 0x82;
send_buffer[4] = attack_level & 0xff;
send_buffer[5] = attack_level >> 8;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret) {
hid_err(t500rs->hdev, "failed modifying effect envelope\n");
goto error;
}
}
if (envelope.fade_length != envelope_old.fade_length) {
send_buffer[3] = 0x84;
send_buffer[4] = fade_length & 0xff;
send_buffer[5] = fade_length >> 8;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret) {
hid_err(t500rs->hdev, "failed modifying effect envelope\n");
goto error;
}
}
if (envelope.fade_level != envelope_old.fade_level) {
send_buffer[3] = 0x88;
send_buffer[4] = fade_level & 0xff;
send_buffer[5] = fade_level >> 8;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret) {
hid_err(t500rs->hdev, "failed modifying effect envelope\n");
goto error;
}
}
error:
return ret;
}
static int t500rs_modify_duration(struct t500rs_device_entry *t500rs,
struct t500rs_effect_state *state, u8 *send_buffer)
{
struct ff_effect effect = state->effect;
struct ff_effect old = state->old;
u16 duration;
int ret = 0, trans;
if (effect.replay.length == 0)
duration = 0xffff;
else
duration = effect.replay.length;
if (effect.replay.length != old.replay.length) {
send_buffer[1] = effect.id + 1;
send_buffer[2] = 0x49;
send_buffer[4] = 0x41;
send_buffer[5] = duration & 0xff;
send_buffer[6] = duration >> 8;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret) {
hid_err(t500rs->hdev, "failed modifying duration\n");
goto error;
}
}
error:
return ret;
}
static int t500rs_modify_constant(struct t500rs_device_entry *t500rs,
struct t500rs_effect_state *state, u8 *send_buffer)
{
struct ff_effect effect = state->effect;
struct ff_effect old = state->old;
struct ff_constant_effect constant = effect.u.constant;
struct ff_constant_effect constant_old = old.u.constant;
int ret, trans;
s16 level;
level = (constant.level * fixp_sin16(effect.direction * 360 / 0x10000)) / 0x7fff;
if (constant.level != constant_old.level) {
send_buffer[1] = effect.id + 1;
send_buffer[2] = 0x0a;
send_buffer[3] = level & 0xff;
send_buffer[4] = level >> 8;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret) {
hid_err(t500rs->hdev, "failed modifying constant effect\n");
goto error;
}
}
ret = t500rs_modify_envelope(t500rs,
state,
send_buffer,
level,
effect.replay.length,
effect.id,
constant.envelope,
constant_old.envelope
);
if (ret) {
hid_err(t500rs->hdev, "failed modifying constant envelope\n");
goto error;
}
ret = t500rs_modify_duration(t500rs, state, send_buffer);
if (ret) {
hid_err(t500rs->hdev, "failed modifying constant duration\n");
goto error;
}
error:
return ret;
}
static int t500rs_modify_ramp(struct t500rs_device_entry *t500rs,
struct t500rs_effect_state *state, u8 *send_buffer)
{
struct ff_effect effect = state->effect;
struct ff_effect old = state->old;
struct ff_ramp_effect ramp = effect.u.ramp;
struct ff_ramp_effect ramp_old = old.u.ramp;
int ret, trans;
u16 difference, top, bottom;
s16 level;
top = ramp.end_level > ramp.start_level ? ramp.end_level : ramp.start_level;
bottom = ramp.end_level > ramp.start_level ? ramp.start_level : ramp.end_level;
difference = ((top - bottom) * fixp_sin16(effect.direction * 360 / 0x10000)) / 0x7fff;
level = (top * fixp_sin16(effect.direction * 360 / 0x10000)) / 0x7fff;
if (ramp.start_level != ramp_old.start_level || ramp.end_level != ramp_old.end_level) {
send_buffer[1] = effect.id + 1;
send_buffer[2] = 0x0e;
send_buffer[3] = 0x03;
send_buffer[4] = difference & 0xff;
send_buffer[5] = difference >> 8;
send_buffer[6] = level & 0xff;
send_buffer[7] = level >> 8;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret) {
hid_err(t500rs->hdev, "failed modifying ramp effect\n");
goto error;
}
}
ret = t500rs_modify_envelope(t500rs,
state,
send_buffer,
level,
effect.replay.length,
effect.id,
ramp.envelope,
ramp_old.envelope
);
if (ret) {
hid_err(t500rs->hdev, "failed modifying ramp envelope\n");
goto error;
}
ret = t500rs_modify_duration(t500rs, state, send_buffer);
if (ret) {
hid_err(t500rs->hdev, "failed modifying ramp duration\n");
goto error;
}
error:
return ret;
}
static int t500rs_modify_damper(struct t500rs_device_entry *t500rs,
struct t500rs_effect_state *state, u8 *send_buffer)
{
struct ff_effect effect = state->effect;
struct ff_effect old = state->old;
struct ff_condition_effect damper = effect.u.condition[0];
struct ff_condition_effect damper_old = old.u.condition[0];
int ret, trans, input_level;
input_level = damper_level;
if (state->effect.type == FF_FRICTION)
input_level = friction_level;
if (state->effect.type == FF_SPRING)
input_level = spring_level;
if (damper.right_coeff != damper_old.right_coeff) {
s16 coeff = damper.right_coeff * input_level / 100;
send_buffer[1] = effect.id + 1;
send_buffer[2] = 0x0e;
send_buffer[3] = 0x41;
send_buffer[4] = coeff & 0xff;
send_buffer[5] = coeff >> 8;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret) {
hid_err(t500rs->hdev, "failed modifying damper rc\n");
goto error;
}
}
if (damper.left_coeff != damper_old.left_coeff) {
s16 coeff = damper.left_coeff * input_level / 100;
send_buffer[1] = effect.id + 1;
send_buffer[2] = 0x0e;
send_buffer[3] = 0x42;
send_buffer[4] = coeff & 0xff;
send_buffer[5] = coeff >> 8;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret) {
hid_err(t500rs->hdev, "failed modifying damper lc\n");
goto error;
}
}
if ((damper.deadband != damper_old.deadband) ||
(damper.center != damper_old.center)) {
u16 deadband_right = 0xfffe - damper.deadband - damper.center;
u16 deadband_left = 0xfffe - damper.deadband + damper.center;
send_buffer[1] = effect.id + 1;
send_buffer[2] = 0x0e;
send_buffer[3] = 0x4c;
send_buffer[4] = deadband_right & 0xff;
send_buffer[5] = deadband_right >> 8;
send_buffer[6] = deadband_left & 0xff;
send_buffer[7] = deadband_left >> 8;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret) {
hid_err(t500rs->hdev, "failed modifying damper deadband\n");
goto error;
}
}
ret = t500rs_modify_duration(t500rs, state, send_buffer);
if (ret) {
hid_err(t500rs->hdev, "failed modifying damper duration\n");
goto error;
}
error:
return ret;
}
static int t500rs_modify_periodic(struct t500rs_device_entry *t500rs,
struct t500rs_effect_state *state, u8 *send_buffer)
{
struct ff_effect effect = state->effect;
struct ff_effect old = state->old;
struct ff_periodic_effect periodic = effect.u.periodic;
struct ff_periodic_effect periodic_old = old.u.periodic;
int ret, trans;
s16 level;
level = (periodic.magnitude * fixp_sin16(effect.direction * 360 / 0x10000)) / 0x7fff;
if (periodic.magnitude != periodic_old.magnitude) {
send_buffer[1] = effect.id + 1;
send_buffer[2] = 0x0e;
send_buffer[3] = 0x01;
send_buffer[4] = level & 0xff;
send_buffer[5] = level >> 8;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret) {
hid_err(t500rs->hdev, "failed modifying periodic magnitude\n");
goto error;
}
}
if (periodic.offset != periodic_old.offset) {
s16 offset = periodic.offset;
send_buffer[1] = effect.id + 1;
send_buffer[2] = 0x0e;
send_buffer[3] = 0x02;
send_buffer[4] = offset & 0xff;
send_buffer[5] = offset >> 8;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret) {
hid_err(t500rs->hdev, "failed modifying periodic offset\n");
goto error;
}
}
if (periodic.phase != periodic_old.phase) {
s16 phase = periodic.phase;
send_buffer[1] = effect.id + 1;
send_buffer[2] = 0x0e;
send_buffer[3] = 0x04;
send_buffer[4] = phase & 0xff;
send_buffer[5] = phase >> 8;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret) {
hid_err(t500rs->hdev, "failed modifying periodic phase\n");
goto error;
}
}
if (periodic.period != periodic_old.period) {
s16 period = periodic.period;
send_buffer[1] = effect.id + 1;
send_buffer[2] = 0x0e;
send_buffer[3] = 0x08;
send_buffer[4] = period & 0xff;
send_buffer[5] = period >> 8;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret) {
hid_err(t500rs->hdev, "failed modifying periodic period\n");
goto error;
}
}
ret = t500rs_modify_envelope(t500rs,
state,
send_buffer,
level,
effect.replay.length,
effect.id,
periodic.envelope,
periodic_old.envelope);
if (ret) {
hid_err(t500rs->hdev, "failed modifying periodic envelope\n");
goto error;
}
ret = t500rs_modify_duration(t500rs, state, send_buffer);
if (ret) {
hid_err(t500rs->hdev, "failed modifying periodic duration\n");
goto error;
}
error:
return ret;
}
static int t500rs_upload_constant(struct t500rs_device_entry *t500rs,
struct t500rs_effect_state *state)
{
u8 *send_buffer = t500rs->send_buffer;
struct ff_effect effect = state->effect;
struct ff_constant_effect constant = state->effect.u.constant;
s16 level;
u16 duration, offset;
int ret, trans;
/* some games, such as DiRT Rally 2 have a weird feeling to them, sort of
* like the wheel pulls just a bit to the right or left and then it just
* stops. I wouldn't be surprised if it's got something to do with the
* constant envelope, but right now I don't know.
*/
if (test_bit(FF_EFFECT_PLAYING, &state->flags) &&
test_bit(FF_EFFECT_QUEUE_UPDATE, &state->flags)) {
__clear_bit(FF_EFFECT_QUEUE_UPLOAD, &state->flags);
return t500rs_modify_constant(t500rs, state, send_buffer);
}
level = (constant.level * fixp_sin16(effect.direction * 360 / 0x10000)) / 0x7fff;
if (effect.replay.length == 0)
duration = 0xffff;
else
duration = effect.replay.length;
offset = effect.replay.delay;
send_buffer[1] = effect.id + 1;
send_buffer[2] = 0x6a;
send_buffer[3] = level & 0xff;
send_buffer[4] = level >> 8;
t500rs_fill_envelope(send_buffer, 5, level,
duration, &constant.envelope);
send_buffer[14] = 0x4f;
send_buffer[15] = duration & 0xff;
send_buffer[16] = duration >> 8;
send_buffer[19] = offset & 0xff;
send_buffer[20] = offset >> 8;
send_buffer[22] = 0xff;
send_buffer[23] = 0xff;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret)
hid_err(t500rs->hdev, "failed uploading constant effect\n");
return ret;
}
static int t500rs_upload_ramp(struct t500rs_device_entry *t500rs,
struct t500rs_effect_state *state)
{
u8 *send_buffer = t500rs->send_buffer;
struct ff_effect effect = state->effect;
struct ff_ramp_effect ramp = state->effect.u.ramp;
int ret, trans;
u16 difference, offset, top, bottom, duration;
s16 level;
if (test_bit(FF_EFFECT_PLAYING, &state->flags) &&
test_bit(FF_EFFECT_QUEUE_UPDATE, &state->flags)) {
__clear_bit(FF_EFFECT_QUEUE_UPLOAD, &state->flags);
return t500rs_modify_ramp(t500rs, state, send_buffer);
}
if (effect.replay.length == 0)
duration = 0xffff;
else
duration = effect.replay.length;
top = ramp.end_level > ramp.start_level ? ramp.end_level : ramp.start_level;
bottom = ramp.end_level > ramp.start_level ? ramp.start_level : ramp.end_level;
difference = ((top - bottom) * fixp_sin16(effect.direction * 360 / 0x10000)) / 0x7fff;
level = (top * fixp_sin16(effect.direction * 360 / 0x10000)) / 0x7fff;
offset = effect.replay.delay;
send_buffer[1] = effect.id + 1;
send_buffer[2] = 0x6b;
send_buffer[3] = difference & 0xff;
send_buffer[4] = difference >> 8;
send_buffer[5] = level & 0xff;
send_buffer[6] = level >> 8;
send_buffer[9] = duration & 0xff;
send_buffer[10] = duration >> 8;
send_buffer[12] = 0x80;
t500rs_fill_envelope(send_buffer, 13, level,
effect.replay.length, &ramp.envelope);
send_buffer[22] = ramp.end_level > ramp.start_level ? 0x04 : 0x05;
send_buffer[23] = 0x4f;
send_buffer[24] = duration & 0xff;
send_buffer[25] = duration >> 8;
send_buffer[28] = offset & 0xff;
send_buffer[29] = offset >> 8;
send_buffer[31] = 0xff;
send_buffer[32] = 0xff;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret)
hid_err(t500rs->hdev, "failed uploading ramp");
return ret;
}
static int t500rs_upload_spring(struct t500rs_device_entry *t500rs,
struct t500rs_effect_state *state)
{
u8 *send_buffer = t500rs->send_buffer;
struct ff_effect effect = state->effect;
/* we only care about the first axis */
struct ff_condition_effect spring = state->effect.u.condition[0];
int ret, trans;
u16 duration, right_coeff, left_coeff, deadband_right, deadband_left, offset;
if (test_bit(FF_EFFECT_PLAYING, &state->flags) &&
test_bit(FF_EFFECT_QUEUE_UPDATE, &state->flags)) {
__clear_bit(FF_EFFECT_QUEUE_UPLOAD, &state->flags);
return t500rs_modify_damper(t500rs, state, send_buffer);
}
if (effect.replay.length == 0)
duration = 0xffff;
else
duration = effect.replay.length;
send_buffer[1] = effect.id + 1;
send_buffer[2] = 0x64;
right_coeff = spring.right_coeff * spring_level / 100;
left_coeff = spring.left_coeff * spring_level / 100;
deadband_right = 0xfffe - spring.deadband - spring.center;
deadband_left = 0xfffe - spring.deadband + spring.center;
offset = effect.replay.delay;
send_buffer[3] = right_coeff & 0xff;
send_buffer[4] = right_coeff >> 8;
send_buffer[5] = left_coeff & 0xff;
send_buffer[6] = left_coeff >> 8;
send_buffer[7] = deadband_right & 0xff;
send_buffer[8] = deadband_right >> 8;
send_buffer[9] = deadband_left & 0xff;
send_buffer[10] = deadband_left >> 8;
memcpy(&send_buffer[11], spring_values, ARRAY_SIZE(spring_values));
send_buffer[28] = 0x4f;
send_buffer[29] = duration & 0xff;
send_buffer[30] = duration >> 8;
send_buffer[33] = offset & 0xff;
send_buffer[34] = offset >> 8;
send_buffer[36] = 0xff;
send_buffer[37] = 0xff;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret)
hid_err(t500rs->hdev, "failed uploading spring\n");
return ret;
}
static int t500rs_upload_damper(struct t500rs_device_entry *t500rs,
struct t500rs_effect_state *state)
{
u8 *send_buffer = t500rs->send_buffer;
struct ff_effect effect = state->effect;
/* we only care about the first axis */
struct ff_condition_effect spring = state->effect.u.condition[0];
int ret, trans, input_level;
u16 duration, right_coeff, left_coeff, deadband_right, deadband_left, offset;
if (test_bit(FF_EFFECT_PLAYING, &state->flags) &&
test_bit(FF_EFFECT_QUEUE_UPDATE, &state->flags)) {
__clear_bit(FF_EFFECT_QUEUE_UPLOAD, &state->flags);
return t500rs_modify_damper(t500rs, state, send_buffer);
}
if (effect.replay.length == 0)
duration = 0xffff;
else
duration = effect.replay.length;
input_level = damper_level;
if (state->effect.type == FF_FRICTION)
input_level = friction_level;
send_buffer[1] = effect.id + 1;
send_buffer[2] = 0x64;
right_coeff = spring.right_coeff * input_level / 100;
left_coeff = spring.left_coeff * input_level / 100;
deadband_right = 0xfffe - spring.deadband - spring.center;
deadband_left = 0xfffe - spring.deadband + spring.center;
offset = effect.replay.delay;
send_buffer[3] = right_coeff & 0xff;
send_buffer[4] = right_coeff >> 8;
send_buffer[5] = left_coeff & 0xff;
send_buffer[6] = left_coeff >> 8;
send_buffer[7] = deadband_right & 0xff;
send_buffer[8] = deadband_right >> 8;
send_buffer[9] = deadband_left & 0xff;
send_buffer[10] = deadband_left >> 8;
memcpy(&send_buffer[11], damper_values, ARRAY_SIZE(damper_values));
send_buffer[28] = 0x4f;
send_buffer[29] = duration & 0xff;
send_buffer[30] = duration >> 8;
send_buffer[33] = offset & 0xff;
send_buffer[34] = offset >> 8;
send_buffer[36] = 0xff;
send_buffer[37] = 0xff;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret)
hid_err(t500rs->hdev, "failed uploading spring\n");
return ret;
}
static int t500rs_upload_periodic(struct t500rs_device_entry *t500rs,
struct t500rs_effect_state *state)
{
u8 *send_buffer = t500rs->send_buffer;
struct ff_effect effect = state->effect;
struct ff_periodic_effect periodic = state->effect.u.periodic;
int ret, trans;
u16 duration, magnitude, phase, period, offset;
s16 periodic_offset;
if (test_bit(FF_EFFECT_PLAYING, &state->flags) &&
test_bit(FF_EFFECT_QUEUE_UPDATE, &state->flags)) {
__clear_bit(FF_EFFECT_QUEUE_UPLOAD, &state->flags);
return t500rs_modify_periodic(t500rs, state, send_buffer);
}
if (effect.replay.length == 0)
duration = 0xffff;
else
duration = effect.replay.length;
magnitude = (periodic.magnitude * fixp_sin16(effect.direction * 360 / 0x10000)) / 0x7fff;
phase = periodic.phase;
periodic_offset = periodic.offset;
period = periodic.period;
offset = effect.replay.delay;
send_buffer[1] = effect.id + 1;
send_buffer[2] = 0x6b;
send_buffer[3] = magnitude & 0xff;
send_buffer[4] = magnitude >> 8;
send_buffer[7] = phase & 0xff;
send_buffer[8] = phase >> 8;
send_buffer[5] = periodic_offset & 0xff;
send_buffer[6] = periodic_offset >> 8;
send_buffer[9] = period & 0xff;
send_buffer[10] = period >> 8;
send_buffer[12] = 0x80;
t500rs_fill_envelope(send_buffer, 13, magnitude,
effect.replay.length, &periodic.envelope);
send_buffer[21] = periodic.waveform - 0x57;
send_buffer[22] = 0x4f;
send_buffer[23] = duration & 0xff;
send_buffer[24] = duration >> 8;
send_buffer[27] = offset & 0xff;
send_buffer[28] = offset >> 8;
send_buffer[30] = 0xff;
send_buffer[31] = 0xff;
ret = t500rs_send_int(t500rs->input_dev, send_buffer, &trans);
if (ret)
hid_err(t500rs->hdev, "failed uploading periodic effect");
return ret;
}
static int t500rs_upload_effect(struct t500rs_device_entry *t500rs,
struct t500rs_effect_state *state)
{
switch (state->effect.type) {
case FF_CONSTANT:
return t500rs_upload_constant(t500rs, state);
case FF_RAMP:
return t500rs_upload_ramp(t500rs, state);
case FF_SPRING:
return t500rs_upload_spring(t500rs, state);
case FF_DAMPER:
case FF_FRICTION:
case FF_INERTIA:
return t500rs_upload_damper(t500rs, state);
case FF_PERIODIC:
return t500rs_upload_periodic(t500rs, state);
default:
hid_err(t500rs->hdev, "invalid effect type: %x", state->effect.type);
return -1;
}
}
static int t500rs_timer_helper(struct t500rs_device_entry *t500rs)
{
struct t500rs_effect_state *state;
unsigned long jiffies_now = JIFFIES2MS(jiffies);
int max_count = 0, effect_id, ret;
for (effect_id = 0; effect_id < T500RS_MAX_EFFECTS; ++effect_id) {
state = &t500rs->states[effect_id];
if (test_bit(FF_EFFECT_PLAYING, &state->flags) && state->effect.replay.length) {
if ((jiffies_now - state->start_time) >= state->effect.replay.length) {
__clear_bit(FF_EFFECT_PLAYING, &state->flags);
/* lazy bum fix? */
__clear_bit(FF_EFFECT_QUEUE_UPDATE, &state->flags);
if (state->count)
state->count--;
if (state->count)
__set_bit(FF_EFFECT_QUEUE_START, &state->flags);
}
}
if (test_bit(FF_EFFECT_QUEUE_UPLOAD, &state->flags)) {
__clear_bit(FF_EFFECT_QUEUE_UPLOAD, &state->flags);
ret = t500rs_upload_effect(t500rs, state);
if (ret) {
hid_err(t500rs->hdev, "failed uploading effects");
return ret;
}
}
if (test_bit(FF_EFFECT_QUEUE_START, &state->flags)) {
__clear_bit(FF_EFFECT_QUEUE_START, &state->flags);
__set_bit(FF_EFFECT_PLAYING, &state->flags);
ret = t500rs_play_effect(t500rs, state);
if (ret) {
hid_err(t500rs->hdev, "failed starting effects\n");
return ret;
}
}
if (test_bit(FF_EFFECT_QUEUE_STOP, &state->flags)) {
__clear_bit(FF_EFFECT_QUEUE_STOP, &state->flags);
__clear_bit(FF_EFFECT_PLAYING, &state->flags);
ret = t500rs_stop_effect(t500rs, state);
if (ret) {
hid_err(t500rs->hdev, "failed stopping effect\n");
return ret;
}
}