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hid-ftecff.c
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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 friction_level = 100;
static int profile = 1;
module_param(profile, int, 0660);
MODULE_PARM_DESC(profile, "Enable profile debug messages.");
#define FTEC_TUNING_REPORT_SIZE 64
#define FTEC_WHEEL_REPORT_SIZE 34
#define ADDR_SLOT 0x02
#define ADDR_SEN 0x03
#define ADDR_FF 0x04
#define ADDR_SHO 0x05
#define ADDR_BLI 0x06
#define ADDR_DRI 0x09
#define ADDR_FOR 0x0a
#define ADDR_SPR 0x0b
#define ADDR_DPR 0x0c
#define ADDR_FEI 0x11
static const signed short ftecff_wheel_effects[] = {
FF_CONSTANT,
FF_SPRING,
FF_DAMPER,
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];
}
}
static u8 num[11][8] = { { 1,1,1,1,1,1,0,0 }, // 0
{ 0,1,1,0,0,0,0,0 }, // 1
{ 1,1,0,1,1,0,1,0 }, // 2
{ 1,1,1,1,0,0,1,0 }, // 3
{ 0,1,1,0,0,1,1,0 }, // 4
{ 1,0,1,1,0,1,1,0 }, // 5
{ 1,0,1,1,1,1,1,0 }, // 6
{ 1,1,1,0,0,0,0,0 }, // 7
{ 1,1,1,1,1,1,1,0 }, // 8
{ 1,1,1,0,0,1,1,0 }, // 9
{ 0,0,0,0,0,0,0,1}}; // dot
static u8 seg_bits(u8 value) {
int i;
u8 bits = 0;
for( i=0; i<8; i++) {
if (num[value][i])
bits |= 1 << i;
}
return bits;
}
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;
size_t 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;
u16 range = simple_strtoul(buf, NULL, 10);
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 hid_device *hid = to_hid_device(dev);
struct usb_device *udev = interface_to_usbdev(to_usb_interface(hid->dev.parent));
u8 *buffer = kcalloc(FTEC_WHEEL_REPORT_SIZE, sizeof(u8), GFP_KERNEL);
size_t count = 0;
int ret, actual_len;
u16 wheel_id;
// request current values
buffer[0] = 0x01;
buffer[1] = 0xf8;
buffer[2] = 0x09;
buffer[3] = 0x01;
buffer[4] = 0x06;
ret = hid_hw_output_report(hid, buffer, 8);
if (ret < 0) {
kfree(buffer);
return count;
}
// FXIME: again ... (values only update 2nd time?)
ret = hid_hw_output_report(hid, buffer, 8);
if (ret < 0) {
kfree(buffer);
return count;
}
// reset memory
memset((void*)buffer, 0, FTEC_WHEEL_REPORT_SIZE);
// read values
ret = usb_interrupt_msg(udev, usb_rcvintpipe(udev, 81),
buffer, FTEC_WHEEL_REPORT_SIZE, &actual_len,
USB_CTRL_SET_TIMEOUT);
memcpy((void*)&wheel_id, &buffer[0x1e], sizeof(u16));
kfree(buffer);
count = scnprintf(buf, PAGE_SIZE, "0x%04x\n", wheel_id);
return count;
}
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;
s16 val = simple_strtol(buf, NULL, 10);
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;
if (val>=0) {
value[4] = seg_bits((val/100)%100);
value[5] = seg_bits((val/10)%10);
value[6] = seg_bits(val%10);
}
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);
static int ftec_tuning_read(struct hid_device *hid, u8 *buf) {
struct usb_device *dev = interface_to_usbdev(to_usb_interface(hid->dev.parent));
int ret, actual_len;
// request current values
buf[0] = 0xff;
buf[1] = 0x03;
buf[2] = 0x02;
ret = hid_hw_output_report(hid, buf, FTEC_TUNING_REPORT_SIZE);
if (ret < 0)
goto out;
// reset memory
memset((void*)buf, 0, FTEC_TUNING_REPORT_SIZE);
// read values
ret = usb_interrupt_msg(dev, usb_rcvintpipe(dev, 81),
buf, FTEC_TUNING_REPORT_SIZE, &actual_len,
USB_CTRL_SET_TIMEOUT);
out:
return ret;
}
static int ftec_tuning_write(struct hid_device *hid, int addr, int val) {
u8 *buf = kcalloc(FTEC_TUNING_REPORT_SIZE+1, sizeof(u8), GFP_KERNEL);
int ret;
// shift by 1 so that values are at correct location for write back
if (ftec_tuning_read(hid, buf+1) < 0)
goto out;
dbg_hid(" ... ftec_tuning_write %i; current: %i; new:%i\n", addr, buf[addr+1], val);
// update requested value and write back
buf[0] = 0xff;
buf[1] = 0x03;
buf[2] = 0x00;
buf[addr+1] = val;
ret = hid_hw_output_report(hid, buf, FTEC_TUNING_REPORT_SIZE);
out:
kfree(buf);
return 0;
}
static int ftec_tuning_select(struct hid_device *hid, int slot) {
u8 *buf = kcalloc(FTEC_TUNING_REPORT_SIZE, sizeof(u8), GFP_KERNEL);
int ret;
if (ftec_tuning_read(hid, buf) < 0)
goto out;
// return if already selected
if (buf[ADDR_SLOT] == slot || slot<=0 || slot>NUM_TUNING_SLOTS) {
dbg_hid(" ... ftec_tuning_select slot already selected or invalid value; current: %i; new:%i\n", buf[ADDR_SLOT], slot);
goto out;
}
dbg_hid(" ... ftec_tuning_select current: %i; new:%i\n", buf[ADDR_SLOT], slot);
// reset memory
memset((void*)buf, 0, FTEC_TUNING_REPORT_SIZE);
buf[0] = 0xff;
buf[1] = 0x03;
buf[2] = 0x01;
buf[3] = slot&0xff;
ret = hid_hw_output_report(hid, buf, FTEC_TUNING_REPORT_SIZE);
if (ret < 0)
goto out;
out:
kfree(buf);
return 0;
}
static int ftec_tuning_get_addr(struct device_attribute *attr) {
int type = 0;
if(strcmp(attr->attr.name, "SLOT") == 0)
type = ADDR_SLOT;
else if(strcmp(attr->attr.name, "SEN") == 0)
type = ADDR_SEN;
else if(strcmp(attr->attr.name, "FF") == 0)
type = ADDR_FF;
else if(strcmp(attr->attr.name, "DRI") == 0)
type = ADDR_DRI;
else if(strcmp(attr->attr.name, "FEI") == 0)
type = ADDR_FEI;
else if(strcmp(attr->attr.name, "FOR") == 0)
type = ADDR_FOR;
else if(strcmp(attr->attr.name, "SPR") == 0)
type = ADDR_SPR;
else if(strcmp(attr->attr.name, "DPR") == 0)
type = ADDR_DPR;
else if(strcmp(attr->attr.name, "BLI") == 0)
type = ADDR_BLI;
else if(strcmp(attr->attr.name, "SHO") == 0)
type = ADDR_SHO;
else {
dbg_hid("Unknown attribute %s\n", attr->attr.name);
}
return type;
}
static ssize_t ftec_tuning_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct hid_device *hid = to_hid_device(dev);
u8 *buffer = kcalloc(FTEC_TUNING_REPORT_SIZE, sizeof(u8), GFP_KERNEL);
int addr = ftec_tuning_get_addr(attr);
size_t count = 0;
s8 value = 0;
dbg_hid(" ... ftec_tuning_show %s, %x\n", attr->attr.name, addr);
if (addr > 0 && ftec_tuning_read(hid, buffer) >= 0) {
memcpy((void*)&value, &buffer[addr], sizeof(s8));
count = scnprintf(buf, PAGE_SIZE, "%i\n", value);
}
kfree(buffer);
return count;
}
static ssize_t ftec_tuning_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct hid_device *hid = to_hid_device(dev);
int addr;
s16 val = simple_strtol(buf, NULL, 10);
dbg_hid(" ... ftec_tuning_store %s %i\n", attr->attr.name, val);
addr = ftec_tuning_get_addr(attr);
if (addr == ADDR_SLOT) {
ftec_tuning_select(hid, val);
} else if (addr > 0) {
ftec_tuning_write(hid, addr, val);
}
return count;
}
static ssize_t ftec_tuning_reset(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct hid_device *hid = to_hid_device(dev);
u8 *buffer = kcalloc(FTEC_TUNING_REPORT_SIZE, sizeof(u8), GFP_KERNEL);
int ret;
// request current values
buffer[0] = 0xff;
buffer[1] = 0x03;
buffer[2] = 0x04;
ret = hid_hw_output_report(hid, buffer, FTEC_TUNING_REPORT_SIZE);
return count;
}
static DEVICE_ATTR(RESET, S_IWUSR | S_IWGRP, NULL, ftec_tuning_reset);
static DEVICE_ATTR(SLOT, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, ftec_tuning_show, ftec_tuning_store);
static DEVICE_ATTR(SEN, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, ftec_tuning_show, ftec_tuning_store);
static DEVICE_ATTR(FF, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, ftec_tuning_show, ftec_tuning_store);
static DEVICE_ATTR(DRI, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, ftec_tuning_show, ftec_tuning_store);
static DEVICE_ATTR(FEI, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, ftec_tuning_show, ftec_tuning_store);
static DEVICE_ATTR(FOR, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, ftec_tuning_show, ftec_tuning_store);
static DEVICE_ATTR(SPR, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, ftec_tuning_show, ftec_tuning_store);
static DEVICE_ATTR(DPR, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, ftec_tuning_show, ftec_tuning_store);
static DEVICE_ATTR(BLI, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, ftec_tuning_show, ftec_tuning_store);
static DEVICE_ATTR(SHO, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, ftec_tuning_show, ftec_tuning_store);
#ifdef 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;
// dbg_hid(" ... set_leds base %04X\n", leds);
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;
spin_lock_irqsave(&drv_data->report_lock, flags);
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
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;
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;
}
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;
}
}
}
void ftecff_update_slot(struct ftecff_slot *slot, struct ftecff_effect_parameters *parameters)
{
u8 original_cmd[7];
unsigned short i;
int d1;
int d2;
int s1;
int s2;
memcpy(original_cmd, slot->current_cmd, sizeof(original_cmd));
// select slot
slot->current_cmd[0] = (slot->id<<4) | 0x1;
// set params to zero
for(i = 2; i < 7; i++)
slot->current_cmd[i] = 0;
if ((slot->effect_type == FF_CONSTANT && parameters->level == 0) ||
(slot->effect_type != FF_CONSTANT && parameters->clip == 0)) {
// disable slot
slot->current_cmd[0] |= 0x2;
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) ((CLAMP_VALUE_S16(x) + 0x8000) >> 8)
#define SCALE_COEFF(x, bits) SCALE_VALUE_U16(abs(x) * 2, bits)
#define SCALE_VALUE_U16(x, bits) (CLAMP_VALUE_U16(x) >> (16 - bits))
switch (slot->effect_type) {
case FF_CONSTANT:
slot->current_cmd[2] = TRANSLATE_FORCE(parameters->level);
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[5] = ((d2 & 7) << 5) + ((d1 & 7) << 1) + (s2 << 4) + s1;
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:
s1 = parameters->k1 < 0;
s2 = parameters->k2 < 0;
slot->current_cmd[2] = SCALE_COEFF(parameters->k1, 4);
// slot->current_cmd[3] = s1;
slot->current_cmd[4] = SCALE_COEFF(parameters->k2, 4);
// slot->current_cmd[5] = s2;
slot->current_cmd[6] = SCALE_VALUE_U16(parameters->clip, 8);
// dbg_hid("damper: %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[4], slot->current_cmd[6]);
break;
case FF_FRICTION:
// s1 = parameters->k1 < 0;
// s2 = parameters->k2 < 0;
// slot->current_cmd[1] = 0x0e;
// slot->current_cmd[2] = SCALE_COEFF(parameters->k1, 8);
// slot->current_cmd[3] = SCALE_COEFF(parameters->k2, 8);
// slot->current_cmd[4] = SCALE_VALUE_U16(parameters->clip, 8);
// slot->current_cmd[5] = (s2 << 4) + s1;
// slot->current_cmd[6] = 0;
// dbg_hid("friction: %i %i %i %i %i\n",
// parameters->k1, parameters->k2, parameters->clip,
// 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];
int d1;
int d2;
d1 = condition->center - condition->deadband / 2;
d2 = condition->center + condition->deadband / 2;
if (d1 < parameters->d1) {
parameters->d1 = d1;
}
if (d2 > parameters->d2) {
parameters->d2 = d2;
}
parameters->k1 += condition->left_coeff;
parameters->k2 += condition->right_coeff;
parameters->clip = max(parameters->clip, (unsigned)max(condition->left_saturation, 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 = max(parameters->clip, (unsigned)max(condition->left_saturation, condition->right_saturation));
}
static __always_inline int ftecff_timer(struct ftec_drv_data *drv_data)
{
struct usbhid_device *usbhid = drv_data->hid->driver_data;
struct ftecff_slot *slot;
struct ftecff_effect_state *state;
struct ftecff_effect_parameters parameters[4];
unsigned long jiffies_now = jiffies;
unsigned long now = JIFFIES2MS(jiffies_now);
unsigned long flags;
unsigned int gain;
int current_period;
int count;
int effect_id;
int i;
// if (usbhid->outhead != usbhid->outtail) {
// current_period = timer_msecs;
// timer_msecs *= 2;
// hid_info(drv_data->hid, "Commands stacking up, increasing timer period to %d ms.", timer_msecs);
// return current_period;
// }
memset(parameters, 0, sizeof(parameters));
gain = 0xffff; //(unsigned long)entry->wdata.master_gain * entry->wdata.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_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 * friction_level / 100;
for (i = 1; i < 4; i++) {