/*
* "ioctl" file op
*/
static int hiddev_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct hiddev_list *list = file->private_data;
struct hiddev *hiddev = list->hiddev;
struct hid_device *hid = hiddev->hid;
struct usb_device *dev = hid->dev;
struct hiddev_collection_info cinfo;
struct hiddev_report_info rinfo;
struct hiddev_field_info finfo;
struct hiddev_usage_ref_multi uref_multi;
struct hiddev_usage_ref *uref = &uref_multi.uref;
struct hiddev_devinfo dinfo;
struct hid_report *report;
struct hid_field *field;
int i;
if (!hiddev->exist) return -EIO;
switch (cmd) {
case HIDIOCGVERSION:
return put_user(HID_VERSION, (int *) arg);
case HIDIOCAPPLICATION:
if (arg < 0 || arg >= hid->maxapplication)
return -EINVAL;
for (i = 0; i < hid->maxcollection; i++)
if (hid->collection[i].type ==
HID_COLLECTION_APPLICATION && arg-- == 0)
break;
if (i == hid->maxcollection)
return -EINVAL;
return hid->collection[i].usage;
case HIDIOCGDEVINFO:
dinfo.bustype = BUS_USB;
dinfo.busnum = dev->bus->busnum;
dinfo.devnum = dev->devnum;
dinfo.ifnum = hid->ifnum;
dinfo.vendor = dev->descriptor.idVendor;
dinfo.product = dev->descriptor.idProduct;
dinfo.version = dev->descriptor.bcdDevice;
dinfo.num_applications = hid->maxapplication;
if (copy_to_user((void *) arg, &dinfo, sizeof(dinfo)))
return -EFAULT;
return 0;
case HIDIOCGFLAG:
return put_user(list->flags, (int *) arg);
case HIDIOCSFLAG:
{
int newflags;
if (get_user(newflags, (int *) arg))
return -EFAULT;
if ((newflags & ~HIDDEV_FLAGS) != 0 ||
((newflags & HIDDEV_FLAG_REPORT) != 0 &&
(newflags & HIDDEV_FLAG_UREF) == 0))
return -EINVAL;
list->flags = newflags;
return 0;
}
case HIDIOCGSTRING:
{
int idx, len;
char *buf;
if (get_user(idx, (int *) arg))
return -EFAULT;
if ((buf = kmalloc(HID_STRING_SIZE, GFP_KERNEL)) == NULL)
return -ENOMEM;
if ((len = usb_string(dev, idx, buf, HID_STRING_SIZE-1)) < 0) {
kfree(buf);
return -EINVAL;
}
if (copy_to_user((void *) (arg+sizeof(int)), buf, len+1)) {
kfree(buf);
return -EFAULT;
}
kfree(buf);
return len;
}
case HIDIOCINITREPORT:
hid_init_reports(hid);
return 0;
case HIDIOCGREPORT:
if (copy_from_user(&rinfo, (void *) arg, sizeof(rinfo)))
return -EFAULT;
if (rinfo.report_type == HID_REPORT_TYPE_OUTPUT)
return -EINVAL;
if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
return -EINVAL;
hid_read_report(hid, report);
return 0;
case HIDIOCSREPORT:
if (copy_from_user(&rinfo, (void *) arg, sizeof(rinfo)))
return -EFAULT;
if (rinfo.report_type == HID_REPORT_TYPE_INPUT)
return -EINVAL;
if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
return -EINVAL;
hid_write_report(hid, report);
return 0;
case HIDIOCGREPORTINFO:
if (copy_from_user(&rinfo, (void *) arg, sizeof(rinfo)))
return -EFAULT;
if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
return -EINVAL;
rinfo.num_fields = report->maxfield;
if (copy_to_user((void *) arg, &rinfo, sizeof(rinfo)))
return -EFAULT;
return 0;
case HIDIOCGFIELDINFO:
if (copy_from_user(&finfo, (void *) arg, sizeof(finfo)))
return -EFAULT;
rinfo.report_type = finfo.report_type;
rinfo.report_id = finfo.report_id;
if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
return -EINVAL;
if (finfo.field_index >= report->maxfield)
return -EINVAL;
field = report->field[finfo.field_index];
memset(&finfo, 0, sizeof(finfo));
finfo.report_type = rinfo.report_type;
finfo.report_id = rinfo.report_id;
finfo.field_index = field->report_count - 1;
finfo.maxusage = field->maxusage;
finfo.flags = field->flags;
finfo.physical = field->physical;
finfo.logical = field->logical;
finfo.application = field->application;
finfo.logical_minimum = field->logical_minimum;
finfo.logical_maximum = field->logical_maximum;
finfo.physical_minimum = field->physical_minimum;
finfo.physical_maximum = field->physical_maximum;
finfo.unit_exponent = field->unit_exponent;
finfo.unit = field->unit;
if (copy_to_user((void *) arg, &finfo, sizeof(finfo)))
return -EFAULT;
return 0;
case HIDIOCGUCODE:
if (copy_from_user(uref, (void *) arg, sizeof(*uref)))
return -EFAULT;
rinfo.report_type = uref->report_type;
rinfo.report_id = uref->report_id;
if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
return -EINVAL;
if (uref->field_index >= report->maxfield)
return -EINVAL;
field = report->field[uref->field_index];
if (uref->usage_index >= field->maxusage)
return -EINVAL;
uref->usage_code = field->usage[uref->usage_index].hid;
if (copy_to_user((void *) arg, uref, sizeof(*uref)))
return -EFAULT;
return 0;
case HIDIOCGUSAGE:
case HIDIOCSUSAGE:
case HIDIOCGUSAGES:
case HIDIOCSUSAGES:
case HIDIOCGCOLLECTIONINDEX:
if (cmd == HIDIOCGUSAGES || cmd == HIDIOCSUSAGES) {
if (copy_from_user(&uref_multi, (void *) arg,
sizeof(uref_multi)))
return -EFAULT;
} else {
if (copy_from_user(uref, (void *) arg, sizeof(*uref)))
return -EFAULT;
}
if (cmd != HIDIOCGUSAGE &&
cmd != HIDIOCGUSAGES &&
uref->report_type == HID_REPORT_TYPE_INPUT)
return -EINVAL;
if (uref->report_id == HID_REPORT_ID_UNKNOWN) {
field = hiddev_lookup_usage(hid, uref);
if (field == NULL)
return -EINVAL;
} else {
rinfo.report_type = uref->report_type;
rinfo.report_id = uref->report_id;
if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
return -EINVAL;
if (uref->field_index >= report->maxfield)
return -EINVAL;
field = report->field[uref->field_index];
if (uref->usage_index >= field->maxusage)
return -EINVAL;
if (cmd == HIDIOCGUSAGES || cmd == HIDIOCSUSAGES) {
if (uref_multi.num_values >= HID_MAX_USAGES ||
uref->usage_index >= field->maxusage ||
(uref->usage_index + uref_multi.num_values) >= field->maxusage)
return -EINVAL;
}
}
switch (cmd) {
case HIDIOCGUSAGE:
uref->value = field->value[uref->usage_index];
return copy_to_user((void *) arg, uref, sizeof(*uref));
case HIDIOCSUSAGE:
field->value[uref->usage_index] = uref->value;
return 0;
case HIDIOCGCOLLECTIONINDEX:
return field->usage[uref->usage_index].collection_index;
case HIDIOCGUSAGES:
for (i = 0; i < uref_multi.num_values; i++)
uref_multi.values[i] =
field->value[uref->usage_index + i];
if (copy_to_user((void *) arg, &uref_multi,
sizeof(uref_multi)))
return -EFAULT;
return 0;
case HIDIOCSUSAGES:
for (i = 0; i < uref_multi.num_values; i++)
field->value[uref->usage_index + i] =
uref_multi.values[i];
return 0;
}
break;
case HIDIOCGCOLLECTIONINFO:
if (copy_from_user(&cinfo, (void *) arg, sizeof(cinfo)))
return -EFAULT;
if (cinfo.index >= hid->maxcollection)
return -EINVAL;
cinfo.type = hid->collection[cinfo.index].type;
cinfo.usage = hid->collection[cinfo.index].usage;
cinfo.level = hid->collection[cinfo.index].level;
if (copy_to_user((void *) arg, &cinfo, sizeof(cinfo)))
return -EFAULT;
return 0;
default:
if (_IOC_TYPE(cmd) != 'H' || _IOC_DIR(cmd) != _IOC_READ)
return -EINVAL;
if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGNAME(0))) {
int len;
if (!hid->name) return 0;
len = strlen(hid->name) + 1;
if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
return copy_to_user((char *) arg, hid->name, len) ?
-EFAULT : len;
}
}
return -EINVAL;
}
/*
* "ioctl" file op
*/
static int hiddev_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct hiddev_list *list = file->private_data;
struct hiddev *hiddev = list->hiddev;
struct hid_device *hid = hiddev->hid;
struct usb_device *dev = hid->dev;
struct hiddev_report_info rinfo;
struct hiddev_usage_ref uref;
struct hid_report *report;
struct hid_field *field;
if (!hiddev->exist) return -EIO;
switch (cmd) {
case HIDIOCGVERSION:
return put_user(HID_VERSION, (int *) arg);
case HIDIOCAPPLICATION:
if (arg < 0 || arg >= hid->maxapplication)
return -EINVAL;
return hid->application[arg];
case HIDIOCGDEVINFO:
{
struct hiddev_devinfo dinfo;
dinfo.bustype = BUS_USB;
dinfo.busnum = dev->bus->busnum;
dinfo.devnum = dev->devnum;
dinfo.ifnum = hid->ifnum;
dinfo.vendor = dev->descriptor.idVendor;
dinfo.product = dev->descriptor.idProduct;
dinfo.version = dev->descriptor.bcdDevice;
dinfo.num_applications = hid->maxapplication;
return copy_to_user((void *) arg, &dinfo, sizeof(dinfo));
}
case HIDIOCGSTRING:
{
int idx, len;
char *buf;
if (get_user(idx, (int *) arg))
return -EFAULT;
if ((buf = kmalloc(HID_STRING_SIZE, GFP_KERNEL)) == NULL)
return -ENOMEM;
if ((len = usb_string(dev, idx, buf, HID_STRING_SIZE-1)) < 0) {
kfree(buf);
return -EINVAL;
}
if (copy_to_user((void *) (arg+sizeof(int)), buf, len+1)) {
kfree(buf);
return -EFAULT;
}
kfree(buf);
return len;
}
case HIDIOCINITREPORT:
hid_init_reports(hid);
return 0;
case HIDIOCGREPORT:
if (copy_from_user(&rinfo, (void *) arg, sizeof(rinfo)))
return -EFAULT;
if (rinfo.report_type == HID_REPORT_TYPE_OUTPUT)
return -EINVAL;
if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
return -EINVAL;
hid_read_report(hid, report);
return 0;
case HIDIOCSREPORT:
if (copy_from_user(&rinfo, (void *) arg, sizeof(rinfo)))
return -EFAULT;
if (rinfo.report_type == HID_REPORT_TYPE_INPUT)
return -EINVAL;
if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
return -EINVAL;
hid_write_report(hid, report);
return 0;
case HIDIOCGREPORTINFO:
if (copy_from_user(&rinfo, (void *) arg, sizeof(rinfo)))
return -EFAULT;
if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
return -EINVAL;
rinfo.num_fields = report->maxfield;
return copy_to_user((void *) arg, &rinfo, sizeof(rinfo));
case HIDIOCGFIELDINFO:
{
struct hiddev_field_info finfo;
if (copy_from_user(&finfo, (void *) arg, sizeof(finfo)))
return -EFAULT;
rinfo.report_type = finfo.report_type;
rinfo.report_id = finfo.report_id;
if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
return -EINVAL;
if (finfo.field_index >= report->maxfield)
return -EINVAL;
field = report->field[finfo.field_index];
memset(&finfo, 0, sizeof(finfo));
finfo.report_type = rinfo.report_type;
finfo.report_id = rinfo.report_id;
finfo.field_index = field->report_count - 1;
finfo.maxusage = field->maxusage;
finfo.flags = field->flags;
finfo.physical = field->physical;
finfo.logical = field->logical;
finfo.application = field->application;
finfo.logical_minimum = field->logical_minimum;
finfo.logical_maximum = field->logical_maximum;
finfo.physical_minimum = field->physical_minimum;
finfo.physical_maximum = field->physical_maximum;
finfo.unit_exponent = field->unit_exponent;
finfo.unit = field->unit;
return copy_to_user((void *) arg, &finfo, sizeof(finfo));
}
case HIDIOCGUCODE:
if (copy_from_user(&uref, (void *) arg, sizeof(uref)))
return -EFAULT;
rinfo.report_type = uref.report_type;
rinfo.report_id = uref.report_id;
if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
return -EINVAL;
if (uref.field_index >= report->maxfield)
return -EINVAL;
field = report->field[uref.field_index];
if (uref.usage_index >= field->maxusage)
return -EINVAL;
uref.usage_code = field->usage[uref.usage_index].hid;
return copy_to_user((void *) arg, &uref, sizeof(uref));
case HIDIOCGUSAGE:
if (copy_from_user(&uref, (void *) arg, sizeof(uref)))
return -EFAULT;
if (uref.report_id == HID_REPORT_ID_UNKNOWN) {
field = hiddev_lookup_usage(hid, &uref);
if (field == NULL)
return -EINVAL;
} else {
rinfo.report_type = uref.report_type;
rinfo.report_id = uref.report_id;
if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
return -EINVAL;
if (uref.field_index >= report->maxfield)
return -EINVAL;
field = report->field[uref.field_index];
if (uref.usage_index >= field->maxusage)
return -EINVAL;
}
uref.value = field->value[uref.usage_index];
return copy_to_user((void *) arg, &uref, sizeof(uref));
case HIDIOCSUSAGE:
if (copy_from_user(&uref, (void *) arg, sizeof(uref)))
return -EFAULT;
if (uref.report_type == HID_REPORT_TYPE_INPUT)
return -EINVAL;
if (uref.report_id == HID_REPORT_ID_UNKNOWN) {
field = hiddev_lookup_usage(hid, &uref);
if (field == NULL)
return -EINVAL;
} else {
rinfo.report_type = uref.report_type;
rinfo.report_id = uref.report_id;
if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
return -EINVAL;
if (uref.field_index >= report->maxfield)
return -EINVAL;
field = report->field[uref.field_index];
if (uref.usage_index >= field->maxusage)
return -EINVAL;
}
field->value[uref.usage_index] = uref.value;
return 0;
default:
if (_IOC_TYPE(cmd) != 'H' || _IOC_DIR(cmd) != _IOC_READ)
return -EINVAL;
if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGNAME(0))) {
int len;
if (!hid->name) return 0;
len = strlen(hid->name) + 1;
if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
return copy_to_user((char *) arg, hid->name, len) ?
-EFAULT : len;
}
}
return -EINVAL;
}