/**
* usb_tranzport_disconnect
*
* Called by the usb core when the device is removed from the system.
*/
static void usb_tranzport_disconnect(struct usb_interface *intf)
{
struct usb_tranzport *dev;
int minor;
mutex_lock(&disconnect_mutex);
dev = usb_get_intfdata(intf);
usb_set_intfdata(intf, NULL);
down(&dev->sem);
minor = intf->minor;
/* give back our minor */
usb_deregister_dev(intf, &usb_tranzport_class);
/* if the device is not opened, then we clean up right now */
if (!dev->open_count) {
up(&dev->sem);
usb_tranzport_delete(dev);
} else {
dev->intf = NULL;
up(&dev->sem);
}
mutex_unlock(&disconnect_mutex);
dev_info(&intf->dev, "Tranzport Surface #%d now disconnected\n",
(minor - USB_TRANZPORT_MINOR_BASE));
}
/**
* usb_tranzport_release
*/
static int usb_tranzport_release(struct inode *inode, struct file *file)
{
struct usb_tranzport *dev;
int retval = 0;
dev = file->private_data;
if (dev == NULL) {
retval = -ENODEV;
goto exit;
}
if (mutex_lock_interruptible(&dev->mtx)) {
retval = -ERESTARTSYS;
goto exit;
}
if (dev->open_count != 1) {
retval = -ENODEV;
goto unlock_exit;
}
if (dev->intf == NULL) {
/* the device was unplugged before the file was released */
mutex_unlock(&dev->mtx);
/* unlock here as usb_tranzport_delete frees dev */
usb_tranzport_delete(dev);
retval = -ENODEV;
goto exit;
}
/* wait until write transfer is finished */
if (dev->interrupt_out_busy)
wait_event_interruptible_timeout(dev->write_wait,
!dev->interrupt_out_busy,
2 * HZ);
usb_tranzport_abort_transfers(dev);
dev->open_count = 0;
unlock_exit:
mutex_unlock(&dev->mtx);
exit:
return retval;
}
/**
* usb_tranzport_probe
*
* Called by the usb core when a new device is connected that it thinks
* this driver might be interested in.
*/
static int usb_tranzport_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev(intf);
struct usb_tranzport *dev = NULL;
struct usb_host_interface *iface_desc;
struct usb_endpoint_descriptor *endpoint;
int i;
int true_size;
int retval = -ENOMEM;
/* allocate memory for our device state and intialize it */
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL) {
dev_err(&intf->dev, "Out of memory\n");
goto exit;
}
init_MUTEX(&dev->sem);
dev->intf = intf;
init_waitqueue_head(&dev->read_wait);
init_waitqueue_head(&dev->write_wait);
iface_desc = intf->cur_altsetting;
/* set up the endpoint information */
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
endpoint = &iface_desc->endpoint[i].desc;
if (usb_endpoint_is_int_in(endpoint))
dev->interrupt_in_endpoint = endpoint;
if (usb_endpoint_is_int_out(endpoint))
dev->interrupt_out_endpoint = endpoint;
}
if (dev->interrupt_in_endpoint == NULL) {
dev_err(&intf->dev, "Interrupt in endpoint not found\n");
goto error;
}
if (dev->interrupt_out_endpoint == NULL)
dev_warn(&intf->dev, "Interrupt out endpoint not found (using control endpoint instead)\n");
dev->interrupt_in_endpoint_size = le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize);
if (dev->interrupt_in_endpoint_size != 8)
dev_warn(&intf->dev, "Interrupt in endpoint size is not 8!\n");
if(ring_buffer_size == 0) { ring_buffer_size = RING_BUFFER_SIZE; }
true_size = min(ring_buffer_size,RING_BUFFER_SIZE);
/* FIXME - there are more usb_alloc routines for dma correctness. Needed? */
dev->ring_buffer = kmalloc((true_size*sizeof(struct tranzport_cmd))+8, GFP_KERNEL);
if (!dev->ring_buffer) {
dev_err(&intf->dev, "Couldn't allocate ring_buffer of size %d\n",true_size);
goto error;
}
dev->interrupt_in_buffer = kmalloc(dev->interrupt_in_endpoint_size, GFP_KERNEL);
if (!dev->interrupt_in_buffer) {
dev_err(&intf->dev, "Couldn't allocate interrupt_in_buffer\n");
goto error;
}
dev->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!dev->interrupt_in_urb) {
dev_err(&intf->dev, "Couldn't allocate interrupt_in_urb\n");
goto error;
}
dev->interrupt_out_endpoint_size = dev->interrupt_out_endpoint ? le16_to_cpu(dev->interrupt_out_endpoint->wMaxPacketSize) :
udev->descriptor.bMaxPacketSize0;
if (dev->interrupt_out_endpoint_size !=8)
dev_warn(&intf->dev, "Interrupt out endpoint size is not 8!)\n");
dev->interrupt_out_buffer = kmalloc(write_buffer_size*dev->interrupt_out_endpoint_size, GFP_KERNEL);
if (!dev->interrupt_out_buffer) {
dev_err(&intf->dev, "Couldn't allocate interrupt_out_buffer\n");
goto error;
}
dev->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!dev->interrupt_out_urb) {
dev_err(&intf->dev, "Couldn't allocate interrupt_out_urb\n");
goto error;
}
dev->interrupt_in_interval = min_interrupt_in_interval > dev->interrupt_in_endpoint->bInterval ? min_interrupt_in_interval : dev->interrupt_in_endpoint->bInterval;
if (dev->interrupt_out_endpoint)
dev->interrupt_out_interval = min_interrupt_out_interval > dev->interrupt_out_endpoint->bInterval ? min_interrupt_out_interval : dev->interrupt_out_endpoint->bInterval;
/* we can register the device now, as it is ready */
usb_set_intfdata(intf, dev);
retval = usb_register_dev(intf, &usb_tranzport_class);
if (retval) {
/* something prevented us from registering this driver */
dev_err(&intf->dev, "Not able to get a minor for this device.\n");
usb_set_intfdata(intf, NULL);
goto error;
}
if((retval = device_create_file(&intf->dev, &dev_attr_LightRecord))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_LightTrackrec))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_LightTrackmute))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_LightTracksolo))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_LightAnysolo))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_LightLoop))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_LightPunch))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_wheel))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_event))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_dump_state))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_compress_wheel))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_enable))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_offline))) goto error;
/* let the user know what node this device is now attached to */
dev_info(&intf->dev, "Tranzport Device #%d now attached to major %d minor %d\n",
(intf->minor - USB_TRANZPORT_MINOR_BASE), USB_MAJOR, intf->minor);
exit:
return retval;
error:
usb_tranzport_delete(dev);
return retval;
}