static int make_magnitude_modifier(struct iforce* iforce,
struct resource* mod_chunk, int no_alloc, __s16 level)
{
unsigned char data[3];
if (!no_alloc) {
mutex_lock(&iforce->mem_mutex);
if (allocate_resource(&(iforce->device_memory), mod_chunk, 2,
iforce->device_memory.start, iforce->device_memory.end, 2L,
NULL, NULL)) {
mutex_unlock(&iforce->mem_mutex);
return -ENOSPC;
}
mutex_unlock(&iforce->mem_mutex);
}
data[0] = LO(mod_chunk->start);
data[1] = HI(mod_chunk->start);
data[2] = HIFIX80(level);
iforce_send_packet(iforce, FF_CMD_MAGNITUDE, data);
iforce_dump_packet("magnitude: ", FF_CMD_MAGNITUDE, data);
return 0;
}
static int make_condition_modifier(struct iforce* iforce,
struct resource* mod_chunk, int no_alloc,
__u16 rsat, __u16 lsat, __s16 rk, __s16 lk, u16 db, __s16 center)
{
unsigned char data[10];
if (!no_alloc) {
mutex_lock(&iforce->mem_mutex);
if (allocate_resource(&(iforce->device_memory), mod_chunk, 8,
iforce->device_memory.start, iforce->device_memory.end, 2L,
NULL, NULL)) {
mutex_unlock(&iforce->mem_mutex);
return -ENOSPC;
}
mutex_unlock(&iforce->mem_mutex);
}
data[0] = LO(mod_chunk->start);
data[1] = HI(mod_chunk->start);
data[2] = (100 * rk) >> 15; /* Dangerous: the sign is extended by gcc on plateforms providing an arith shift */
data[3] = (100 * lk) >> 15; /* This code is incorrect on cpus lacking arith shift */
center = (500 * center) >> 15;
data[4] = LO(center);
data[5] = HI(center);
db = (1000 * db) >> 16;
data[6] = LO(db);
data[7] = HI(db);
data[8] = (100 * rsat) >> 16;
data[9] = (100 * lsat) >> 16;
iforce_send_packet(iforce, FF_CMD_CONDITION, data);
iforce_dump_packet("condition", FF_CMD_CONDITION, data);
return 0;
}
static int make_condition_modifier(struct iforce* iforce,
struct resource* mod_chunk, int no_alloc,
__u16 rsat, __u16 lsat, __s16 rk, __s16 lk, u16 db, __s16 center)
{
unsigned char data[10];
if (!no_alloc) {
mutex_lock(&iforce->mem_mutex);
if (allocate_resource(&(iforce->device_memory), mod_chunk, 8,
iforce->device_memory.start, iforce->device_memory.end, 2L,
NULL, NULL)) {
mutex_unlock(&iforce->mem_mutex);
return -ENOSPC;
}
mutex_unlock(&iforce->mem_mutex);
}
data[0] = LO(mod_chunk->start);
data[1] = HI(mod_chunk->start);
data[2] = (100 * rk) >> 15;
data[3] = (100 * lk) >> 15;
center = (500 * center) >> 15;
data[4] = LO(center);
data[5] = HI(center);
db = (1000 * db) >> 16;
data[6] = LO(db);
data[7] = HI(db);
data[8] = (100 * rsat) >> 16;
data[9] = (100 * lsat) >> 16;
iforce_send_packet(iforce, FF_CMD_CONDITION, data);
iforce_dump_packet("condition", FF_CMD_CONDITION, data);
return 0;
}
int iforce_init_device(struct iforce *iforce)
{
struct input_dev *input_dev;
struct ff_device *ff;
unsigned char c[] = "CEOV";
int i, error;
int ff_effects = 0;
input_dev = input_allocate_device();
if (!input_dev)
return -ENOMEM;
init_waitqueue_head(&iforce->wait);
spin_lock_init(&iforce->xmit_lock);
mutex_init(&iforce->mem_mutex);
iforce->xmit.buf = iforce->xmit_data;
iforce->dev = input_dev;
/*
* Input device fields.
*/
switch (iforce->bus) {
#ifdef CONFIG_JOYSTICK_IFORCE_USB
case IFORCE_USB:
input_dev->id.bustype = BUS_USB;
input_dev->dev.parent = &iforce->usbdev->dev;
break;
#endif
#ifdef CONFIG_JOYSTICK_IFORCE_232
case IFORCE_232:
input_dev->id.bustype = BUS_RS232;
input_dev->dev.parent = &iforce->serio->dev;
break;
#endif
}
input_set_drvdata(input_dev, iforce);
input_dev->name = "Unknown I-Force device";
input_dev->open = iforce_open;
input_dev->close = iforce_release;
/*
* On-device memory allocation.
*/
iforce->device_memory.name = "I-Force device effect memory";
iforce->device_memory.start = 0;
iforce->device_memory.end = 200;
iforce->device_memory.flags = IORESOURCE_MEM;
iforce->device_memory.parent = NULL;
iforce->device_memory.child = NULL;
iforce->device_memory.sibling = NULL;
/*
* Wait until device ready - until it sends its first response.
*/
for (i = 0; i < 20; i++)
if (!iforce_get_id_packet(iforce, "O"))
break;
if (i == 20) { /* 5 seconds */
err("Timeout waiting for response from device.");
error = -ENODEV;
goto fail;
}
/*
* Get device info.
*/
if (!iforce_get_id_packet(iforce, "M"))
input_dev->id.vendor = (iforce->edata[2] << 8) | iforce->edata[1];
else
dev_warn(&iforce->dev->dev, "Device does not respond to id packet M\n");
if (!iforce_get_id_packet(iforce, "P"))
input_dev->id.product = (iforce->edata[2] << 8) | iforce->edata[1];
else
dev_warn(&iforce->dev->dev, "Device does not respond to id packet P\n");
if (!iforce_get_id_packet(iforce, "B"))
iforce->device_memory.end = (iforce->edata[2] << 8) | iforce->edata[1];
else
dev_warn(&iforce->dev->dev, "Device does not respond to id packet B\n");
if (!iforce_get_id_packet(iforce, "N"))
ff_effects = iforce->edata[1];
else
dev_warn(&iforce->dev->dev, "Device does not respond to id packet N\n");
/* Check if the device can store more effects than the driver can really handle */
if (ff_effects > IFORCE_EFFECTS_MAX) {
dev_warn(&iforce->dev->dev, "Limiting number of effects to %d (device reports %d)\n",
IFORCE_EFFECTS_MAX, ff_effects);
ff_effects = IFORCE_EFFECTS_MAX;
}
/*
* Display additional info.
*/
for (i = 0; c[i]; i++)
if (!iforce_get_id_packet(iforce, c + i))
iforce_dump_packet("info", iforce->ecmd, iforce->edata);
/*
* Disable spring, enable force feedback.
*/
iforce_set_autocenter(input_dev, 0);
/*
* Find appropriate device entry
*/
for (i = 0; iforce_device[i].idvendor; i++)
if (iforce_device[i].idvendor == input_dev->id.vendor &&
iforce_device[i].idproduct == input_dev->id.product)
break;
iforce->type = iforce_device + i;
input_dev->name = iforce->type->name;
/*
* Set input device bitfields and ranges.
*/
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) |
BIT_MASK(EV_FF_STATUS);
for (i = 0; iforce->type->btn[i] >= 0; i++)
set_bit(iforce->type->btn[i], input_dev->keybit);
set_bit(BTN_DEAD, input_dev->keybit);
for (i = 0; iforce->type->abs[i] >= 0; i++) {
signed short t = iforce->type->abs[i];
switch (t) {
case ABS_X:
case ABS_Y:
case ABS_WHEEL:
input_set_abs_params(input_dev, t, -1920, 1920, 16, 128);
set_bit(t, input_dev->ffbit);
break;
case ABS_THROTTLE:
case ABS_GAS:
case ABS_BRAKE:
input_set_abs_params(input_dev, t, 0, 255, 0, 0);
break;
case ABS_RUDDER:
input_set_abs_params(input_dev, t, -128, 127, 0, 0);
break;
case ABS_HAT0X:
case ABS_HAT0Y:
case ABS_HAT1X:
case ABS_HAT1Y:
input_set_abs_params(input_dev, t, -1, 1, 0, 0);
break;
}
}
if (ff_effects) {
for (i = 0; iforce->type->ff[i] >= 0; i++)
set_bit(iforce->type->ff[i], input_dev->ffbit);
error = input_ff_create(input_dev, ff_effects);
if (error)
goto fail;
ff = input_dev->ff;
ff->upload = iforce_upload_effect;
ff->erase = iforce_erase_effect;
ff->set_gain = iforce_set_gain;
ff->set_autocenter = iforce_set_autocenter;
ff->playback = iforce_playback;
}
/*
* Register input device.
*/
error = input_register_device(iforce->dev);
if (error)
goto fail;
return 0;
fail: input_free_device(input_dev);
return error;
}