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hid-ftecff.c
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#include <linux/module.h>
#include <linux/device.h>
#include <linux/hid.h>
#include <linux/usb.h>
#include <linux/input.h>
#include <linux/moduleparam.h>
#include <linux/hrtimer.h>
#include <linux/fixp-arith.h>
#include "hid-ftec.h"
// parameter to set the initial range
// if unset, the wheels max range is used
int init_range = 0;
module_param(init_range, int, 0);
#define DEFAULT_TIMER_PERIOD 2
#define FF_EFFECT_STARTED 0
#define FF_EFFECT_ALLSET 1
#define FF_EFFECT_PLAYING 2
#define FF_EFFECT_UPDATING 3
#define STOP_EFFECT(state) ((state)->flags = 0)
#undef fixp_sin16
#define fixp_sin16(v) (((v % 360) > 180)? -(fixp_sin32((v % 360) - 180) >> 16) : fixp_sin32(v) >> 16)
#define DEBUG(...) pr_debug("ftecff: " __VA_ARGS__)
#define time_diff(a,b) ({ \
typecheck(unsigned long, a); \
typecheck(unsigned long, b); \
((a) - (long)(b)); })
#define JIFFIES2MS(jiffies) ((jiffies) * 1000 / HZ)
static int timer_msecs = DEFAULT_TIMER_PERIOD;
static int spring_level = 100;
static int damper_level = 100;
static int inertia_level = 100;
static int friction_level = 100;
static int profile = 1;
module_param(profile, int, 0660);
MODULE_PARM_DESC(profile, "Enable profile debug messages.");
static const signed short ftecff_wheel_effects[] = {
FF_CONSTANT,
FF_SPRING,
FF_DAMPER,
FF_INERTIA,
FF_FRICTION,
FF_PERIODIC,
FF_SINE,
FF_SQUARE,
FF_TRIANGLE,
FF_SAW_UP,
FF_SAW_DOWN,
-1
};
/* This is realy weird... if i put a value >0x80 into the report,
the actual value send to the device will be 0x7f. I suspect it has
s.t. todo with the report fields min/max range, which is -127 to 128
but I don't know how to handle this properly... So, here a hack around
this issue
*/
static void fix_values(s32 *values) {
int i;
for(i=0;i<7;i++) {
if (values[i]>=0x80)
values[i] = -0x100 + values[i];
}
}
/*
bits 7 6 5 4 3 2 1 0
7 segments bits and dot
0
5 1
6
4 2
3 7
*/
static u8 segbits[42] ={
63, // 0
6, // 1
91, // 2
79, // 3
102, // 4
109, // 5
125, // 6
7, // 7
127, // 8
103, // 9
128, // dot
0, // blank
57, // [
15, // ]
64, // -
8, // _
119, // a
124, // b
88, // c
94, // d
121, // e
113, // f
61, // g
118, // h
48, // i
14, // j
0, // k - placeholder/blank
56, // l
0, // m - placeholder/blank
84, // n
92, // o
115, // p
103, // q
80, // r
109, // s
120, // t
62, // u
0, // v - placeholder/blank
0, // w - placeholder/blank
0, // x - placeholder/blank
110, // y
91 // z
};
static u8 seg_bits(u8 value, bool point) {
u8 num_index = 11; // defaults to blank
// capital letters ASCII 65 - 90 / poor mans toLower
if(value>63 && value<91) {
value=value+32;
}
// point
if(value==46) {
num_index = 10;
}
// opening square bracket
else if(value==91) {
num_index = 12;
}
// closing square bracket
else if(value==93) {
num_index = 13;
}
// hyphen
else if(value==45) {
num_index = 14;
}
// underscore
else if(value==95) {
num_index = 15;
}
// ascii numbers
else if(value>47 && value<58) {
num_index=value-48;
}
// lower case letters ASCII 98 - 117
else if(value>96 && value<123) {
num_index=value-81;
}
// if a point has to be set, flip it in the segment
return point ? segbits[num_index]+segbits[10] : segbits[num_index];
}
static void send_report_request_to_device(struct ftec_drv_data *drv_data)
{
struct hid_device *hdev = drv_data->hid;
struct hid_report *report = drv_data->report;
if (hdev->product != CSR_ELITE_WHEELBASE_DEVICE_ID)
{
fix_values(report->field[0]->value);
}
hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
}
static void ftec_set_range(struct hid_device *hid, u16 range)
{
struct ftec_drv_data *drv_data;
unsigned long flags;
s32 *value;
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return;
}
value = drv_data->report->field[0]->value;
dbg_hid("setting range to %u\n", range);
/* Prepare "coarse" limit command */
spin_lock_irqsave(&drv_data->report_lock, flags);
value[0] = 0xf5;
value[1] = 0x00;
value[2] = 0x00;
value[3] = 0x00;
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
send_report_request_to_device(drv_data);
value[0] = 0xf8;
value[1] = 0x09;
value[2] = 0x01;
value[3] = 0x06;
value[4] = 0x01;
value[5] = 0x00;
value[6] = 0x00;
send_report_request_to_device(drv_data);
value[0] = 0xf8;
value[1] = 0x81;
value[2] = range&0xff;
value[3] = (range>>8)&0xff;
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
send_report_request_to_device(drv_data);
spin_unlock_irqrestore(&drv_data->report_lock, flags);
}
/* Export the currently set range of the wheel */
static ssize_t ftec_range_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct hid_device *hid = to_hid_device(dev);
struct ftec_drv_data *drv_data = hid_get_drvdata(hid);
size_t count;
/* new wheelbases have tuning menu, so use this to get the range */
if (drv_data->quirks & FTEC_TUNING_MENU) {
count = _ftec_tuning_show(drv_data->tuning.dev, SEN, buf);
return count;
}
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return 0;
}
count = scnprintf(buf, PAGE_SIZE, "%u\n", drv_data->range);
return count;
}
/* Set range to user specified value, call appropriate function
* according to the type of the wheel */
static ssize_t ftec_range_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct hid_device *hid = to_hid_device(dev);
struct ftec_drv_data *drv_data = hid_get_drvdata(hid);
u16 range;
/* new wheelbases have tuning menu, so use this to set the range */
if (drv_data->quirks & FTEC_TUNING_MENU) {
count = _ftec_tuning_store(drv_data->tuning.dev, SEN, buf, count);
return count;
}
if (kstrtou16(buf, 0, &range) != 0) {
hid_err(hid, "Invalid range %s!\n", buf);
return -EINVAL;
}
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return -EINVAL;
}
if (range == 0)
range = drv_data->max_range;
/* Check if the wheel supports range setting
* and that the range is within limits for the wheel */
if (range >= drv_data->min_range && range <= drv_data->max_range) {
ftec_set_range(hid, range);
drv_data->range = range;
}
return count;
}
static DEVICE_ATTR(range, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, ftec_range_show, ftec_range_store);
/* Export the current wheel id */
static ssize_t ftec_wheel_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct ftec_drv_data *drv_data = hid_get_drvdata(to_hid_device(dev));
return scnprintf(buf, PAGE_SIZE, "0x%02x\n", drv_data->wheel_id);
}
static DEVICE_ATTR(wheel_id, S_IRUSR | S_IRGRP | S_IROTH, ftec_wheel_show, NULL);
static ssize_t ftec_set_display(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct hid_device *hid = to_hid_device(dev);
struct ftec_drv_data *drv_data;
unsigned long flags;
s32 *value;
unsigned int valueIndex, bufIndex = 0;
// check the buffer size, note that in lack of points or commas, only the first 3 characters will be processed
if (count > 7) {
hid_err(hid, "Invalid value %s!\n", buf);
return -EINVAL;
}
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return -EINVAL;
}
// dbg_hid(" ... set_display %i\n", val);
value = drv_data->report->field[0]->value;
spin_lock_irqsave(&drv_data->report_lock, flags);
value[0] = 0xf8;
value[1] = 0x09;
value[2] = 0x01;
value[3] = 0x02;
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
// set each of the segments as long there is input data
for(valueIndex = 4; valueIndex <= 6 && bufIndex < count; valueIndex++) {
bool point = false;
// check if next char is a point or comma if not end of the string
if(bufIndex+1 < count) {
point = buf[bufIndex+1] == '.' || buf[bufIndex+1] == ',';
}
value[valueIndex] = seg_bits(buf[bufIndex], point);
// determinate next value, if a dot was encountered we need to step one index further
bufIndex += point ? 2 : 1;
}
// 'center' values by shifting shorter inputs to the right
if(value[4] > 0x00 && value[6] == 0x00) {
if(value[5] == 0x00) {
value[5] = value[4];
value[4] = 0x00;
}
else if(value[5] > 0) {
value[6] = value[5];
value[5] = value[4];
value[4] = 0x00;
}
}
send_report_request_to_device(drv_data);
spin_unlock_irqrestore(&drv_data->report_lock, flags);
return count;
}
static DEVICE_ATTR(display, S_IWUSR | S_IWGRP, NULL, ftec_set_display);
#if IS_REACHABLE(CONFIG_LEDS_CLASS)
static void ftec_set_leds(struct hid_device *hid, u16 leds)
{
struct ftec_drv_data *drv_data;
unsigned long flags;
s32 *value;
u16 _leds = 0;
int i;
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return;
}
spin_lock_irqsave(&drv_data->report_lock, flags);
if (drv_data->quirks & FTEC_WHEELBASE_LEDS) {
// dbg_hid(" ... set_leds base %04X\n", leds);
value = drv_data->report->field[0]->value;
value[0] = 0xf8;
value[1] = 0x13;
value[2] = leds&0xff;
value[3] = 0x00;
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
send_report_request_to_device(drv_data);
}
// reshuffle, since first led is highest bit
for( i=0; i<LEDS; i++) {
if (leds>>i & 1) _leds |= 1 << (LEDS-i-1);
}
// dbg_hid(" ... set_leds wheel %04X\n", _leds);
value = drv_data->report->field[0]->value;
value[0] = 0xf8;
value[1] = 0x09;
value[2] = 0x08;
value[3] = (_leds>>8)&0xff;
value[4] = _leds&0xff;
value[5] = 0x00;
value[6] = 0x00;
send_report_request_to_device(drv_data);
spin_unlock_irqrestore(&drv_data->report_lock, flags);
}
static void ftec_led_set_brightness(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct device *dev = led_cdev->dev->parent;
struct hid_device *hid = to_hid_device(dev);
struct ftec_drv_data *drv_data = hid_get_drvdata(hid);
int i, state = 0;
if (!drv_data) {
hid_err(hid, "Device data not found.");
return;
}
for (i = 0; i < LEDS; i++) {
if (led_cdev != drv_data->led[i])
continue;
state = (drv_data->led_state >> i) & 1;
if (value == LED_OFF && state) {
drv_data->led_state &= ~(1 << i);
ftec_set_leds(hid, drv_data->led_state);
} else if (value != LED_OFF && !state) {
drv_data->led_state |= 1 << i;
ftec_set_leds(hid, drv_data->led_state);
}
break;
}
}
static enum led_brightness ftec_led_get_brightness(struct led_classdev *led_cdev)
{
struct device *dev = led_cdev->dev->parent;
struct hid_device *hid = to_hid_device(dev);
struct ftec_drv_data *drv_data = hid_get_drvdata(hid);
int i, value = 0;
if (!drv_data) {
hid_err(hid, "Device data not found.");
return LED_OFF;
}
for (i = 0; i < LEDS; i++)
if (led_cdev == drv_data->led[i]) {
value = (drv_data->led_state >> i) & 1;
break;
}
return value ? LED_FULL : LED_OFF;
}
#endif
#if IS_REACHABLE(CONFIG_LEDS_CLASS)
static int ftec_init_led(struct hid_device *hid) {
struct led_classdev *led;
size_t name_sz;
char *name;
struct ftec_drv_data *drv_data;
int ret, j;
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Cannot add device, private driver data not allocated\n");
return -1;
}
{
// wheel LED initialization sequence
// not sure what's needed
s32 *value;
value = drv_data->report->field[0]->value;
value[0] = 0xf8;
value[1] = 0x09;
value[2] = 0x08;
value[3] = 0x01; // set green led to indicate driver is loaded
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
send_report_request_to_device(drv_data);
}
drv_data->led_state = 0;
for (j = 0; j < LEDS; j++)
drv_data->led[j] = NULL;
name_sz = strlen(dev_name(&hid->dev)) + 8;
for (j = 0; j < LEDS; j++) {
led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
if (!led) {
hid_err(hid, "can't allocate memory for LED %d\n", j);
goto err_leds;
}
name = (void *)(&led[1]);
snprintf(name, name_sz, "%s::RPM%d", dev_name(&hid->dev), j+1);
led->name = name;
led->brightness = 0;
led->max_brightness = 1;
led->brightness_get = ftec_led_get_brightness;
led->brightness_set = ftec_led_set_brightness;
drv_data->led[j] = led;
ret = led_classdev_register(&hid->dev, led);
if (ret) {
hid_err(hid, "failed to register LED %d. Aborting.\n", j);
err_leds:
/* Deregister LEDs (if any) */
for (j = 0; j < LEDS; j++) {
led = drv_data->led[j];
drv_data->led[j] = NULL;
if (!led)
continue;
led_classdev_unregister(led);
kfree(led);
}
return -1;
}
}
return 0;
}
#endif
static void ftecff_send_cmd(struct ftec_drv_data *drv_data, u8 *cmd)
{
unsigned short i;
unsigned long flags;
s32 *value = drv_data->report->field[0]->value;
spin_lock_irqsave(&drv_data->report_lock, flags);
for(i = 0; i < 7; i++)
value[i] = cmd[i];
send_report_request_to_device(drv_data);
spin_unlock_irqrestore(&drv_data->report_lock, flags);
if (unlikely(profile))
DEBUG("send_cmd: %02X %02X %02X %02X %02X %02X %02X", cmd[0], cmd[1], cmd[2], cmd[3], cmd[4], cmd[5], cmd[6]);
}
static __always_inline struct ff_envelope *ftecff_effect_envelope(struct ff_effect *effect)
{
switch (effect->type) {
case FF_CONSTANT:
return &effect->u.constant.envelope;
case FF_RAMP:
return &effect->u.ramp.envelope;
case FF_PERIODIC:
return &effect->u.periodic.envelope;
}
return NULL;
}
static __always_inline void ftecff_update_state(struct ftecff_effect_state *state, const unsigned long now)
{
struct ff_effect *effect = &state->effect;
unsigned long phase_time;
if (!__test_and_set_bit(FF_EFFECT_ALLSET, &state->flags)) {
state->play_at = state->start_at + effect->replay.delay;
if (!test_bit(FF_EFFECT_UPDATING, &state->flags)) {
state->updated_at = state->play_at;
}
state->direction_gain = fixp_sin16(effect->direction * 360 / 0x10000);
if (effect->type == FF_PERIODIC) {
state->phase_adj = effect->u.periodic.phase * 360 / effect->u.periodic.period;
}
if (effect->replay.length) {
state->stop_at = state->play_at + effect->replay.length;
}
}
if (__test_and_clear_bit(FF_EFFECT_UPDATING, &state->flags)) {
__clear_bit(FF_EFFECT_PLAYING, &state->flags);
state->play_at = state->start_at + effect->replay.delay;
state->direction_gain = fixp_sin16(effect->direction * 360 / 0x10000);
if (effect->replay.length) {
state->stop_at = state->play_at + effect->replay.length;
}
if (effect->type == FF_PERIODIC) {
state->phase_adj = state->phase;
}
}
state->envelope = ftecff_effect_envelope(effect);
state->slope = 0;
if (effect->type == FF_RAMP && effect->replay.length) {
state->slope = ((effect->u.ramp.end_level - effect->u.ramp.start_level) << 16) / (effect->replay.length - state->envelope->attack_length - state->envelope->fade_length);
}
if (!test_bit(FF_EFFECT_PLAYING, &state->flags) && time_after_eq(now,
state->play_at) && (effect->replay.length == 0 ||
time_before(now, state->stop_at))) {
__set_bit(FF_EFFECT_PLAYING, &state->flags);
}
if (test_bit(FF_EFFECT_PLAYING, &state->flags)) {
state->time_playing = time_diff(now, state->play_at);
if (effect->type == FF_PERIODIC) {
phase_time = time_diff(now, state->updated_at);
state->phase = (phase_time % effect->u.periodic.period) * 360 / effect->u.periodic.period;
state->phase += state->phase_adj % 360;
}
}
}
static void ftecff_update_slot(struct ftecff_slot *slot, struct ftecff_effect_parameters *parameters, const bool highres)
{
u8 original_cmd[7];
unsigned short i;
int d1;
int d2;
int s1;
int s2;
memcpy(original_cmd, slot->current_cmd, sizeof(original_cmd));
memset(slot->current_cmd, 0, sizeof(slot->current_cmd));
// select slot
slot->current_cmd[0] = (slot->id<<4) | 0x1;
// set command
slot->current_cmd[1] = slot->cmd;
if ((slot->effect_type == FF_CONSTANT && parameters->level == 0) ||
(slot->effect_type != FF_CONSTANT && parameters->clip == 0)) {
// disable slot
slot->current_cmd[0] |= 0x2;
// reset values
if (slot->effect_type != FF_CONSTANT && slot->effect_type != FF_SPRING) {
slot->current_cmd[2] = 0x00;
slot->current_cmd[4] = 0x00;
slot->current_cmd[6] = 0xff;
}
if (original_cmd[0] != slot->current_cmd[0]) {
slot->is_updated = 1;
}
return;
}
#define CLAMP_VALUE_U16(x) ((unsigned short)((x) > 0xffff ? 0xffff : (x)))
#define CLAMP_VALUE_S16(x) ((unsigned short)((x) <= -0x8000 ? -0x8000 : ((x) > 0x7fff ? 0x7fff : (x))))
#define TRANSLATE_FORCE(x, bits) ((CLAMP_VALUE_S16(x) + 0x8000) >> (16 - bits))
#define SCALE_VALUE_U16(x, bits) (CLAMP_VALUE_U16(x) >> (16 - bits))
#define SCALE_COEFF(x, bits) SCALE_VALUE_U16(abs(x) * 2, bits)
switch (slot->effect_type) {
case FF_CONSTANT:
if (highres) {
d1 = TRANSLATE_FORCE(parameters->level, 16);
slot->current_cmd[2] = d1&0xff;
slot->current_cmd[3] = (d1>>8)&0xff;
slot->current_cmd[6] = 0x01;
} else {
slot->current_cmd[2] = TRANSLATE_FORCE(parameters->level, 8);
}
// dbg_hid("constant: %i 0x%x 0x%x 0x%x\n",
// parameters->level, slot->current_cmd[2], slot->current_cmd[3], slot->current_cmd[6]);
break;
case FF_SPRING:
d1 = SCALE_VALUE_U16(((parameters->d1) + 0x8000) & 0xffff, 11);
d2 = SCALE_VALUE_U16(((parameters->d2) + 0x8000) & 0xffff, 11);
s1 = parameters->k1 < 0;
s2 = parameters->k2 < 0;
slot->current_cmd[2] = d1 >> 3;
slot->current_cmd[3] = d2 >> 3;
slot->current_cmd[4] = (SCALE_COEFF(parameters->k2, 4) << 4) + SCALE_COEFF(parameters->k1, 4);
slot->current_cmd[6] = SCALE_VALUE_U16(parameters->clip, 8);
// dbg_hid("spring: %i %i %i %i %i %i %i %i %i\n",
// parameters->d1, parameters->d2, parameters->k1, parameters->k2, parameters->clip,
// slot->current_cmd[2], slot->current_cmd[3], slot->current_cmd[4], slot->current_cmd[6]);
break;
case FF_DAMPER:
case FF_INERTIA:
case FF_FRICTION:
slot->current_cmd[2] = SCALE_COEFF(parameters->k1, 4);
slot->current_cmd[4] = SCALE_COEFF(parameters->k2, 4);
slot->current_cmd[6] = SCALE_VALUE_U16(parameters->clip, 8);
// dbg_hid("damper/friction/inertia: 0x%x %i %i %i %i %i %i %i %i\n",
// slot->effect_type, parameters->d1, parameters->d2, parameters->k1, parameters->k2, parameters->clip,
// slot->current_cmd[2], slot->current_cmd[4], slot->current_cmd[6]);
break;
}
// check if slot needs to be updated
for(i = 0; i < 7; i++) {
if (original_cmd[i] != slot->current_cmd[i]) {
slot->is_updated = 1;
break;
}
}
}
static __always_inline int ftecff_calculate_constant(struct ftecff_effect_state *state)
{
int level = state->effect.u.constant.level;
int level_sign;
long d, t;
if (state->time_playing < state->envelope->attack_length) {
level_sign = level < 0 ? -1 : 1;
d = level - level_sign * state->envelope->attack_level;
level = level_sign * state->envelope->attack_level + d * state->time_playing / state->envelope->attack_length;
} else if (state->effect.replay.length) {
t = state->time_playing - state->effect.replay.length + state->envelope->fade_length;
if (t > 0) {
level_sign = level < 0 ? -1 : 1;
d = level - level_sign * state->envelope->fade_level;
level = level - d * t / state->envelope->fade_length;
}
}
return state->direction_gain * level / 0x7fff;
}
static __always_inline int ftecff_calculate_periodic(struct ftecff_effect_state *state)
{
struct ff_periodic_effect *periodic = &state->effect.u.periodic;
int level = periodic->offset;
int magnitude = periodic->magnitude;
int magnitude_sign = magnitude < 0 ? -1 : 1;
long d, t;
if (state->time_playing < state->envelope->attack_length) {
d = magnitude - magnitude_sign * state->envelope->attack_level;
magnitude = magnitude_sign * state->envelope->attack_level + d * state->time_playing / state->envelope->attack_length;
} else if (state->effect.replay.length) {
t = state->time_playing - state->effect.replay.length + state->envelope->fade_length;
if (t > 0) {
d = magnitude - magnitude_sign * state->envelope->fade_level;
magnitude = magnitude - d * t / state->envelope->fade_length;
}
}
switch (periodic->waveform) {
case FF_SINE:
level += fixp_sin16(state->phase) * magnitude / 0x7fff;
break;
case FF_SQUARE:
level += (state->phase < 180 ? 1 : -1) * magnitude;
break;
case FF_TRIANGLE:
level += abs(state->phase * magnitude * 2 / 360 - magnitude) * 2 - magnitude;
break;
case FF_SAW_UP:
level += state->phase * magnitude * 2 / 360 - magnitude;
break;
case FF_SAW_DOWN:
level += magnitude - state->phase * magnitude * 2 / 360;
break;
}
return state->direction_gain * level / 0x7fff;
}
static __always_inline void ftecff_calculate_spring(struct ftecff_effect_state *state, struct ftecff_effect_parameters *parameters)
{
struct ff_condition_effect *condition = &state->effect.u.condition[0];
parameters->d1 = ((int)condition->center) - condition->deadband / 2;
parameters->d2 = ((int)condition->center) + condition->deadband / 2;
parameters->k1 = condition->left_coeff;
parameters->k2 = condition->right_coeff;
parameters->clip = (unsigned)condition->right_saturation;
}
static __always_inline void ftecff_calculate_resistance(struct ftecff_effect_state *state, struct ftecff_effect_parameters *parameters)
{
struct ff_condition_effect *condition = &state->effect.u.condition[0];
parameters->k1 = condition->left_coeff;
parameters->k2 = condition->right_coeff;
parameters->clip = (unsigned)condition->right_saturation;
}
static __always_inline int ftecff_timer(struct ftec_drv_data *drv_data)
{
struct ftecff_slot *slot;
struct ftecff_effect_state *state;
struct ftecff_effect_parameters parameters[5];
unsigned long jiffies_now = jiffies;
unsigned long now = JIFFIES2MS(jiffies_now);
unsigned long flags;
unsigned int gain;
int count;
int effect_id;
int i;
memset(parameters, 0, sizeof(parameters));
gain = 0xffff;
spin_lock_irqsave(&drv_data->timer_lock, flags);
count = drv_data->effects_used;
for (effect_id = 0; effect_id < FTECFF_MAX_EFFECTS; effect_id++) {
if (!count) {
break;
}
state = &drv_data->states[effect_id];
if (!test_bit(FF_EFFECT_STARTED, &state->flags)) {
continue;
}
count--;
if (test_bit(FF_EFFECT_ALLSET, &state->flags)) {
if (state->effect.replay.length && time_after_eq(now, state->stop_at)) {
STOP_EFFECT(state);
if (!--state->count) {
drv_data->effects_used--;
continue;
}
__set_bit(FF_EFFECT_STARTED, &state->flags);
state->start_at = state->stop_at;
}
}
ftecff_update_state(state, now);
if (!test_bit(FF_EFFECT_PLAYING, &state->flags)) {
continue;
}
switch (state->effect.type) {
case FF_CONSTANT:
parameters[0].level += ftecff_calculate_constant(state);
break;
case FF_SPRING:
ftecff_calculate_spring(state, ¶meters[1]);
break;
case FF_DAMPER:
ftecff_calculate_resistance(state, ¶meters[2]);
break;
case FF_INERTIA:
ftecff_calculate_resistance(state, ¶meters[3]);
break;
case FF_FRICTION:
ftecff_calculate_resistance(state, ¶meters[4]);
break;
case FF_PERIODIC:
parameters[0].level += ftecff_calculate_periodic(state);
break;
}
}
spin_unlock_irqrestore(&drv_data->timer_lock, flags);
parameters[0].level = (long)parameters[0].level * gain / 0xffff;
parameters[1].clip = (long)parameters[1].clip * spring_level / 100;
parameters[2].clip = (long)parameters[2].clip * damper_level / 100;
parameters[3].clip = (long)parameters[3].clip * inertia_level / 100;
parameters[4].clip = (long)parameters[4].clip * friction_level / 100;
for (i = 1; i < 5; i++) {
parameters[i].k1 = (long)parameters[i].k1 * gain / 0xffff;
parameters[i].k2 = (long)parameters[i].k2 * gain / 0xffff;
parameters[i].clip = (long)parameters[i].clip * gain / 0xffff;
}
for (i = 0; i < 5; i++) {
slot = &drv_data->slots[i];
ftecff_update_slot(slot, ¶meters[i], drv_data->quirks & FTEC_HIGHRES);
if (slot->is_updated) {
ftecff_send_cmd(drv_data, slot->current_cmd);
slot->is_updated = 0;
}
}
return 0;
}
static enum hrtimer_restart ftecff_timer_hires(struct hrtimer *t)
{
struct ftec_drv_data *drv_data = container_of(t, struct ftec_drv_data, hrtimer);
int delay_timer;
int overruns;
delay_timer = ftecff_timer(drv_data);
if (delay_timer) {
hrtimer_forward_now(&drv_data->hrtimer, ms_to_ktime(delay_timer));
return HRTIMER_RESTART;
}
if (drv_data->effects_used) {
overruns = hrtimer_forward_now(&drv_data->hrtimer, ms_to_ktime(timer_msecs));
overruns--;
if (unlikely(profile && overruns > 0))
DEBUG("Overruns: %d", overruns);
return HRTIMER_RESTART;
} else {
if (unlikely(profile))
DEBUG("Stop timer.");
return HRTIMER_NORESTART;
}
}
static void ftecff_init_slots(struct ftec_drv_data *drv_data)
{
struct ftecff_effect_parameters parameters;
int i;
memset(&drv_data->states, 0, sizeof(drv_data->states));
memset(&drv_data->slots, 0, sizeof(drv_data->slots));
memset(¶meters, 0, sizeof(parameters));
drv_data->slots[0].effect_type = FF_CONSTANT;
drv_data->slots[1].effect_type = FF_SPRING;
drv_data->slots[2].effect_type = FF_DAMPER;
drv_data->slots[3].effect_type = FF_INERTIA;
drv_data->slots[4].effect_type = FF_FRICTION;
drv_data->slots[0].cmd = 0x08;
drv_data->slots[1].cmd = 0x0b;
drv_data->slots[2].cmd = 0x0c;
drv_data->slots[3].cmd = 0x0c;
drv_data->slots[4].cmd = 0x0c;
for (i = 0; i < 5; i++) {
drv_data->slots[i].id = i;
ftecff_update_slot(&drv_data->slots[i], ¶meters, drv_data->quirks & FTEC_HIGHRES);
ftecff_send_cmd(drv_data, drv_data->slots[i].current_cmd);
drv_data->slots[i].is_updated = 0;
}
}
static void ftecff_stop_effects(struct ftec_drv_data *drv_data)
{
u8 cmd[7] = {0};
cmd[0] = 0xf3;
ftecff_send_cmd(drv_data, cmd);
}
static int ftecff_upload_effect(struct input_dev *dev, struct ff_effect *effect, struct ff_effect *old)
{
struct hid_device *hdev = input_get_drvdata(dev);
struct ftec_drv_data *drv_data = hid_get_drvdata(hdev);
struct ftecff_effect_state *state;
unsigned long now = JIFFIES2MS(jiffies);
unsigned long flags;
state = &drv_data->states[effect->id];
if (0) {
struct ff_condition_effect *condition = &effect->u.condition[0];
printk("id %u, state %lu, delay %u, interval %u, type %#02x, effect direction %#04x", effect->id, state->flags, effect->replay.delay, effect->trigger.interval, effect->type, effect->direction);
if (effect->type == FF_PERIODIC) {
printk(KERN_CONT ", magnitude %i, offset %i, phase %#02x, period %u\n", effect->u.periodic.magnitude, effect->u.periodic.offset, effect->u.periodic.phase, effect->u.periodic.period);
} else {
printk(KERN_CONT ", level %i, left_coeff %i, right_coeff %i, left_saturation %i, right_saturation %i\n", effect->u.constant.level, condition->left_coeff, condition->right_coeff, condition->left_saturation, condition->right_saturation);
}
// return 0;
}
if (effect->type == FF_PERIODIC && effect->u.periodic.period == 0) {
return -EINVAL;
}
if (test_bit(FF_EFFECT_STARTED, &state->flags) && effect->type != state->effect.type) {
return -EINVAL;
}
spin_lock_irqsave(&drv_data->timer_lock, flags);
state->effect = *effect;
if (test_bit(FF_EFFECT_STARTED, &state->flags)) {
__set_bit(FF_EFFECT_UPDATING, &state->flags);
state->updated_at = now;