static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
{
unsigned char *rep_data;
int limit = 0, report_id = 2;
int error = -ENOMEM;
rep_data = kmalloc(4, GFP_KERNEL);
if (!rep_data)
return error;
/* ask to report tablet data if it is 2FGT Tablet PC or
* not a Tablet PC */
if (((features->type == TABLETPC2FG) || (features->type == MTSCREEN))
&& features->device_type != BTN_TOOL_PEN) {
do {
rep_data[0] = 3;
rep_data[1] = 4;
rep_data[2] = 0;
rep_data[3] = 0;
report_id = 3;
error = usb_set_report(intf, WAC_HID_FEATURE_REPORT,
report_id, rep_data, 4);
if (error >= 0)
error = usb_get_report(intf,
WAC_HID_FEATURE_REPORT, report_id,
rep_data, 4);
} while ((error < 0 || rep_data[1] != 4) && limit++ < WAC_MSG_RETRIES);
} else if (features->type != TABLETPC &&
features->device_type == BTN_TOOL_PEN) {
do {
rep_data[0] = 2;
rep_data[1] = 2;
error = usb_set_report(intf, WAC_HID_FEATURE_REPORT,
report_id, rep_data, 2);
if (error >= 0)
error = usb_get_report(intf,
WAC_HID_FEATURE_REPORT, report_id,
rep_data, 2);
} while ((error < 0 || rep_data[1] != 2) && limit++ < WAC_MSG_RETRIES);
}
kfree(rep_data);
return error < 0 ? error : 0;
}
/**
* iowarrior_ioctl
*/
static long iowarrior_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct iowarrior *dev = NULL;
__u8 *buffer;
__u8 __user *user_buffer;
int retval;
int io_res; /* checks for bytes read/written and copy_to/from_user results */
dev = file->private_data;
if (dev == NULL) {
return -ENODEV;
}
buffer = kzalloc(dev->report_size, GFP_KERNEL);
if (!buffer)
return -ENOMEM;
/* lock this object */
mutex_lock(&iowarrior_mutex);
mutex_lock(&dev->mutex);
/* verify that the device wasn't unplugged */
if (!dev->present) {
retval = -ENODEV;
goto error_out;
}
dbg("%s - minor %d, cmd 0x%.4x, arg %ld", __func__, dev->minor, cmd,
arg);
retval = 0;
io_res = 0;
switch (cmd) {
case IOW_WRITE:
if (dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW24 ||
dev->product_id == USB_DEVICE_ID_CODEMERCS_IOWPV1 ||
dev->product_id == USB_DEVICE_ID_CODEMERCS_IOWPV2 ||
dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW40) {
user_buffer = (__u8 __user *)arg;
io_res = copy_from_user(buffer, user_buffer,
dev->report_size);
if (io_res) {
retval = -EFAULT;
} else {
io_res = usb_set_report(dev->interface, 2, 0,
buffer,
dev->report_size);
if (io_res < 0)
retval = io_res;
}
} else {
retval = -EINVAL;
dev_err(&dev->interface->dev,
"ioctl 'IOW_WRITE' is not supported for product=0x%x.\n",
dev->product_id);
}
break;
case IOW_READ:
user_buffer = (__u8 __user *)arg;
io_res = usb_get_report(dev->udev,
dev->interface->cur_altsetting, 1, 0,
buffer, dev->report_size);
if (io_res < 0)
retval = io_res;
else {
io_res = copy_to_user(user_buffer, buffer, dev->report_size);
if (io_res)
retval = -EFAULT;
}
break;
case IOW_GETINFO:
{
/* Report available information for the device */
struct iowarrior_info info;
/* needed for power consumption */
struct usb_config_descriptor *cfg_descriptor = &dev->udev->actconfig->desc;
memset(&info, 0, sizeof(info));
/* directly from the descriptor */
info.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
info.product = dev->product_id;
info.revision = le16_to_cpu(dev->udev->descriptor.bcdDevice);
/* 0==UNKNOWN, 1==LOW(usb1.1) ,2=FULL(usb1.1), 3=HIGH(usb2.0) */
info.speed = le16_to_cpu(dev->udev->speed);
info.if_num = dev->interface->cur_altsetting->desc.bInterfaceNumber;
info.report_size = dev->report_size;
/* serial number string has been read earlier 8 chars or empty string */
memcpy(info.serial, dev->chip_serial,
sizeof(dev->chip_serial));
if (cfg_descriptor == NULL) {
info.power = -1; /* no information available */
} else {
/* the MaxPower is stored in units of 2mA to make it fit into a byte-value */
info.power = cfg_descriptor->bMaxPower * 2;
}
io_res = copy_to_user((struct iowarrior_info __user *)arg, &info,
sizeof(struct iowarrior_info));
if (io_res)
retval = -EFAULT;
break;
}
default:
/* return that we did not understand this ioctl call */
retval = -ENOTTY;
break;
}
error_out:
/* unlock the device */
mutex_unlock(&dev->mutex);
mutex_unlock(&iowarrior_mutex);
kfree(buffer);
return retval;
}
/*
* iowarrior_write
*/
static ssize_t iowarrior_write(struct file *file,
const char __user *user_buffer,
size_t count, loff_t *ppos)
{
struct iowarrior *dev;
int retval = 0;
char *buf = NULL; /* for IOW24 and IOW56 we need a buffer */
struct urb *int_out_urb = NULL;
dev = file->private_data;
mutex_lock(&dev->mutex);
/* verify that the device wasn't unplugged */
if (!dev->present) {
retval = -ENODEV;
goto exit;
}
dbg("%s - minor %d, count = %zd", __func__, dev->minor, count);
/* if count is 0 we're already done */
if (count == 0) {
retval = 0;
goto exit;
}
/* We only accept full reports */
if (count != dev->report_size) {
retval = -EINVAL;
goto exit;
}
switch (dev->product_id) {
case USB_DEVICE_ID_CODEMERCS_IOW24:
case USB_DEVICE_ID_CODEMERCS_IOWPV1:
case USB_DEVICE_ID_CODEMERCS_IOWPV2:
case USB_DEVICE_ID_CODEMERCS_IOW40:
/* IOW24 and IOW40 use a synchronous call */
buf = kmalloc(count, GFP_KERNEL);
if (!buf) {
retval = -ENOMEM;
goto exit;
}
if (copy_from_user(buf, user_buffer, count)) {
retval = -EFAULT;
kfree(buf);
goto exit;
}
retval = usb_set_report(dev->interface, 2, 0, buf, count);
kfree(buf);
goto exit;
break;
case USB_DEVICE_ID_CODEMERCS_IOW56:
/* The IOW56 uses asynchronous IO and more urbs */
if (atomic_read(&dev->write_busy) == MAX_WRITES_IN_FLIGHT) {
/* Wait until we are below the limit for submitted urbs */
if (file->f_flags & O_NONBLOCK) {
retval = -EAGAIN;
goto exit;
} else {
retval = wait_event_interruptible(dev->write_wait,
(!dev->present || (atomic_read (&dev-> write_busy) < MAX_WRITES_IN_FLIGHT)));
if (retval) {
/* we were interrupted by a signal */
retval = -ERESTART;
goto exit;
}
if (!dev->present) {
/* The device was unplugged */
retval = -ENODEV;
goto exit;
}
if (!dev->opened) {
/* We were closed while waiting for an URB */
retval = -ENODEV;
goto exit;
}
}
}
atomic_inc(&dev->write_busy);
int_out_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!int_out_urb) {
retval = -ENOMEM;
dbg("%s Unable to allocate urb ", __func__);
goto error_no_urb;
}
buf = usb_alloc_coherent(dev->udev, dev->report_size,
GFP_KERNEL, &int_out_urb->transfer_dma);
if (!buf) {
retval = -ENOMEM;
dbg("%s Unable to allocate buffer ", __func__);
goto error_no_buffer;
}
usb_fill_int_urb(int_out_urb, dev->udev,
usb_sndintpipe(dev->udev,
dev->int_out_endpoint->bEndpointAddress),
buf, dev->report_size,
iowarrior_write_callback, dev,
dev->int_out_endpoint->bInterval);
int_out_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
if (copy_from_user(buf, user_buffer, count)) {
retval = -EFAULT;
goto error;
}
retval = usb_submit_urb(int_out_urb, GFP_KERNEL);
if (retval) {
dbg("%s submit error %d for urb nr.%d", __func__,
retval, atomic_read(&dev->write_busy));
goto error;
}
/* submit was ok */
retval = count;
usb_free_urb(int_out_urb);
goto exit;
break;
default:
/* what do we have here ? An unsupported Product-ID ? */
dev_err(&dev->interface->dev, "%s - not supported for product=0x%x\n",
__func__, dev->product_id);
retval = -EFAULT;
goto exit;
break;
}
error:
usb_free_coherent(dev->udev, dev->report_size, buf,
int_out_urb->transfer_dma);
error_no_buffer:
usb_free_urb(int_out_urb);
error_no_urb:
atomic_dec(&dev->write_busy);
wake_up_interruptible(&dev->write_wait);
exit:
mutex_unlock(&dev->mutex);
return retval;
}
static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *dev = interface_to_usbdev(intf);
struct usb_host_interface *interface = intf->cur_altsetting;
struct usb_endpoint_descriptor *endpoint;
struct wacom *wacom;
struct wacom_wac *wacom_wac;
struct wacom_features *features;
struct input_dev *input_dev;
int error = -ENOMEM;
char rep_data[2], limit = 0;
struct hid_descriptor *hid_desc;
wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
wacom_wac = kzalloc(sizeof(struct wacom_wac), GFP_KERNEL);
input_dev = input_allocate_device();
if (!wacom || !input_dev || !wacom_wac)
goto fail1;
wacom_wac->data = usb_buffer_alloc(dev, 10, GFP_KERNEL, &wacom->data_dma);
if (!wacom_wac->data)
goto fail1;
wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
if (!wacom->irq)
goto fail2;
wacom->usbdev = dev;
wacom->dev = input_dev;
wacom->intf = intf;
mutex_init(&wacom->lock);
usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
wacom_wac->features = features = get_wacom_feature(id);
BUG_ON(features->pktlen > 10);
input_dev->name = wacom_wac->features->name;
wacom->wacom_wac = wacom_wac;
usb_to_input_id(dev, &input_dev->id);
input_dev->dev.parent = &intf->dev;
input_set_drvdata(input_dev, wacom);
input_dev->open = wacom_open;
input_dev->close = wacom_close;
endpoint = &intf->cur_altsetting->endpoint[0].desc;
/* Initialize touch_x_max and touch_y_max in case it is not defined */
if (wacom_wac->features->type == TABLETPC) {
features->touch_x_max = 1023;
features->touch_y_max = 1023;
} else {
features->touch_x_max = 0;
features->touch_y_max = 0;
}
/* TabletPC need to retrieve the physical and logical maximum from report descriptor */
if (wacom_wac->features->type == TABLETPC) {
if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) {
if (usb_get_extra_descriptor(&interface->endpoint[0],
HID_DEVICET_REPORT, &hid_desc)) {
printk("wacom: can not retrive extra class descriptor\n");
goto fail2;
}
}
error = wacom_parse_hid(intf, hid_desc, wacom_wac);
if (error)
goto fail2;
}
input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_PEN) |
BIT_MASK(BTN_TOUCH) | BIT_MASK(BTN_STYLUS);
input_set_abs_params(input_dev, ABS_X, 0, features->x_max, 4, 0);
input_set_abs_params(input_dev, ABS_Y, 0, features->y_max, 4, 0);
input_set_abs_params(input_dev, ABS_PRESSURE, 0, features->pressure_max, 0, 0);
if (features->type == TABLETPC) {
input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_DOUBLETAP);
input_set_abs_params(input_dev, ABS_RX, 0, features->touch_x_max, 4, 0);
input_set_abs_params(input_dev, ABS_RY, 0, features->touch_y_max, 4, 0);
}
input_dev->absbit[BIT_WORD(ABS_MISC)] |= BIT_MASK(ABS_MISC);
wacom_init_input_dev(input_dev, wacom_wac);
usb_fill_int_urb(wacom->irq, dev,
usb_rcvintpipe(dev, endpoint->bEndpointAddress),
wacom_wac->data, wacom_wac->features->pktlen,
wacom_sys_irq, wacom, endpoint->bInterval);
wacom->irq->transfer_dma = wacom->data_dma;
wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
error = input_register_device(wacom->dev);
if (error)
goto fail3;
/*
* Ask the tablet to report tablet data if it is not a Tablet PC.
* Repeat until it succeeds
*/
if (wacom_wac->features->type != TABLETPC) {
do {
rep_data[0] = 2;
rep_data[1] = 2;
error = usb_set_report(intf, WAC_HID_FEATURE_REPORT,
2, rep_data, 2);
if (error >= 0)
error = usb_get_report(intf,
WAC_HID_FEATURE_REPORT, 2,
rep_data, 2);
} while ((error < 0 || rep_data[1] != 2) && limit++ < 5);
}
usb_set_intfdata(intf, wacom);
return 0;
fail3: usb_free_urb(wacom->irq);
fail2: usb_buffer_free(dev, 10, wacom_wac->data, wacom->data_dma);
fail1: input_free_device(input_dev);
kfree(wacom);
kfree(wacom_wac);
return error;
}
static long iowarrior_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct iowarrior *dev = NULL;
__u8 *buffer;
__u8 __user *user_buffer;
int retval;
int io_res; /* */
dev = file->private_data;
if (dev == NULL) {
return -ENODEV;
}
buffer = kzalloc(dev->report_size, GFP_KERNEL);
if (!buffer)
return -ENOMEM;
/* */
mutex_lock(&iowarrior_mutex);
mutex_lock(&dev->mutex);
/* */
if (!dev->present) {
retval = -ENODEV;
goto error_out;
}
dbg("%s - minor %d, cmd 0x%.4x, arg %ld", __func__, dev->minor, cmd,
arg);
retval = 0;
io_res = 0;
switch (cmd) {
case IOW_WRITE:
if (dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW24 ||
dev->product_id == USB_DEVICE_ID_CODEMERCS_IOWPV1 ||
dev->product_id == USB_DEVICE_ID_CODEMERCS_IOWPV2 ||
dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW40) {
user_buffer = (__u8 __user *)arg;
io_res = copy_from_user(buffer, user_buffer,
dev->report_size);
if (io_res) {
retval = -EFAULT;
} else {
io_res = usb_set_report(dev->interface, 2, 0,
buffer,
dev->report_size);
if (io_res < 0)
retval = io_res;
}
} else {
retval = -EINVAL;
dev_err(&dev->interface->dev,
"ioctl 'IOW_WRITE' is not supported for product=0x%x.\n",
dev->product_id);
}
break;
case IOW_READ:
user_buffer = (__u8 __user *)arg;
io_res = usb_get_report(dev->udev,
dev->interface->cur_altsetting, 1, 0,
buffer, dev->report_size);
if (io_res < 0)
retval = io_res;
else {
io_res = copy_to_user(user_buffer, buffer, dev->report_size);
if (io_res)
retval = -EFAULT;
}
break;
case IOW_GETINFO:
{
/* */
struct iowarrior_info info;
/* */
struct usb_config_descriptor *cfg_descriptor = &dev->udev->actconfig->desc;
memset(&info, 0, sizeof(info));
/* */
info.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
info.product = dev->product_id;
info.revision = le16_to_cpu(dev->udev->descriptor.bcdDevice);
/* */
info.speed = le16_to_cpu(dev->udev->speed);
info.if_num = dev->interface->cur_altsetting->desc.bInterfaceNumber;
info.report_size = dev->report_size;
/* */
memcpy(info.serial, dev->chip_serial,
sizeof(dev->chip_serial));
if (cfg_descriptor == NULL) {
info.power = -1; /* */
} else {
/* */
info.power = cfg_descriptor->bMaxPower * 2;
}
io_res = copy_to_user((struct iowarrior_info __user *)arg, &info,
sizeof(struct iowarrior_info));
if (io_res)
retval = -EFAULT;
break;
}
default:
/* */
retval = -ENOTTY;
break;
}
error_out:
/* */
mutex_unlock(&dev->mutex);
mutex_unlock(&iowarrior_mutex);
kfree(buffer);
return retval;
}
static ssize_t iowarrior_write(struct file *file,
const char __user *user_buffer,
size_t count, loff_t *ppos)
{
struct iowarrior *dev;
int retval = 0;
char *buf = NULL; /* */
struct urb *int_out_urb = NULL;
dev = file->private_data;
mutex_lock(&dev->mutex);
/* */
if (!dev->present) {
retval = -ENODEV;
goto exit;
}
dbg("%s - minor %d, count = %zd", __func__, dev->minor, count);
/* */
if (count == 0) {
retval = 0;
goto exit;
}
/* */
if (count != dev->report_size) {
retval = -EINVAL;
goto exit;
}
switch (dev->product_id) {
case USB_DEVICE_ID_CODEMERCS_IOW24:
case USB_DEVICE_ID_CODEMERCS_IOWPV1:
case USB_DEVICE_ID_CODEMERCS_IOWPV2:
case USB_DEVICE_ID_CODEMERCS_IOW40:
/* */
buf = kmalloc(count, GFP_KERNEL);
if (!buf) {
retval = -ENOMEM;
goto exit;
}
if (copy_from_user(buf, user_buffer, count)) {
retval = -EFAULT;
kfree(buf);
goto exit;
}
retval = usb_set_report(dev->interface, 2, 0, buf, count);
kfree(buf);
goto exit;
break;
case USB_DEVICE_ID_CODEMERCS_IOW56:
/* */
if (atomic_read(&dev->write_busy) == MAX_WRITES_IN_FLIGHT) {
/* */
if (file->f_flags & O_NONBLOCK) {
retval = -EAGAIN;
goto exit;
} else {
retval = wait_event_interruptible(dev->write_wait,
(!dev->present || (atomic_read (&dev-> write_busy) < MAX_WRITES_IN_FLIGHT)));
if (retval) {
/* */
retval = -ERESTART;
goto exit;
}
if (!dev->present) {
/* */
retval = -ENODEV;
goto exit;
}
if (!dev->opened) {
/* */
retval = -ENODEV;
goto exit;
}
}
}
atomic_inc(&dev->write_busy);
int_out_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!int_out_urb) {
retval = -ENOMEM;
dbg("%s Unable to allocate urb ", __func__);
goto error_no_urb;
}
buf = usb_alloc_coherent(dev->udev, dev->report_size,
GFP_KERNEL, &int_out_urb->transfer_dma);
if (!buf) {
retval = -ENOMEM;
dbg("%s Unable to allocate buffer ", __func__);
goto error_no_buffer;
}
usb_fill_int_urb(int_out_urb, dev->udev,
usb_sndintpipe(dev->udev,
dev->int_out_endpoint->bEndpointAddress),
buf, dev->report_size,
iowarrior_write_callback, dev,
dev->int_out_endpoint->bInterval);
int_out_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
if (copy_from_user(buf, user_buffer, count)) {
retval = -EFAULT;
goto error;
}
retval = usb_submit_urb(int_out_urb, GFP_KERNEL);
if (retval) {
dbg("%s submit error %d for urb nr.%d", __func__,
retval, atomic_read(&dev->write_busy));
goto error;
}
/* */
retval = count;
usb_free_urb(int_out_urb);
goto exit;
break;
default:
/* */
dev_err(&dev->interface->dev, "%s - not supported for product=0x%x\n",
__func__, dev->product_id);
retval = -EFAULT;
goto exit;
break;
}
error:
usb_free_coherent(dev->udev, dev->report_size, buf,
int_out_urb->transfer_dma);
error_no_buffer:
usb_free_urb(int_out_urb);
error_no_urb:
atomic_dec(&dev->write_busy);
wake_up_interruptible(&dev->write_wait);
exit:
mutex_unlock(&dev->mutex);
return retval;
}
static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *dev = interface_to_usbdev(intf);
struct usb_endpoint_descriptor *endpoint;
struct wacom *wacom;
struct wacom_wac *wacom_wac;
struct input_dev *input_dev;
int error = -ENOMEM;
char rep_data[2], limit = 0;
wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
wacom_wac = kzalloc(sizeof(struct wacom_wac), GFP_KERNEL);
input_dev = input_allocate_device();
if (!wacom || !input_dev || !wacom_wac)
goto fail1;
wacom_wac->data = usb_buffer_alloc(dev, 10, GFP_KERNEL, &wacom->data_dma);
if (!wacom_wac->data)
goto fail1;
wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
if (!wacom->irq)
goto fail2;
wacom->usbdev = dev;
wacom->dev = input_dev;
usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
wacom_wac->features = get_wacom_feature(id);
BUG_ON(wacom_wac->features->pktlen > 10);
input_dev->name = wacom_wac->features->name;
wacom->wacom_wac = wacom_wac;
usb_to_input_id(dev, &input_dev->id);
input_dev->dev.parent = &intf->dev;
input_set_drvdata(input_dev, wacom);
input_dev->open = wacom_open;
input_dev->close = wacom_close;
input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_PEN) |
BIT_MASK(BTN_TOUCH) | BIT_MASK(BTN_STYLUS);
input_set_abs_params(input_dev, ABS_X, 0, wacom_wac->features->x_max, 4, 0);
input_set_abs_params(input_dev, ABS_Y, 0, wacom_wac->features->y_max, 4, 0);
input_set_abs_params(input_dev, ABS_PRESSURE, 0, wacom_wac->features->pressure_max, 0, 0);
input_dev->absbit[BIT_WORD(ABS_MISC)] |= BIT_MASK(ABS_MISC);
wacom_init_input_dev(input_dev, wacom_wac);
endpoint = &intf->cur_altsetting->endpoint[0].desc;
usb_fill_int_urb(wacom->irq, dev,
usb_rcvintpipe(dev, endpoint->bEndpointAddress),
wacom_wac->data, wacom_wac->features->pktlen,
wacom_sys_irq, wacom, endpoint->bInterval);
wacom->irq->transfer_dma = wacom->data_dma;
wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
error = input_register_device(wacom->dev);
if (error)
goto fail3;
/* Ask the tablet to report tablet data. Repeat until it succeeds */
do {
rep_data[0] = 2;
rep_data[1] = 2;
usb_set_report(intf, 3, 2, rep_data, 2);
usb_get_report(intf, 3, 2, rep_data, 2);
} while (rep_data[1] != 2 && limit++ < 5);
usb_set_intfdata(intf, wacom);
return 0;
fail3:
usb_free_urb(wacom->irq);
fail2:
usb_buffer_free(dev, 10, wacom_wac->data, wacom->data_dma);
fail1:
input_free_device(input_dev);
kfree(wacom);
kfree(wacom_wac);
return error;
}
