static void parport_attach(struct parport *port)
{
printk(KERN_INFO "%s: Using %s for debugging\n", THIS_MODULE->name, port->name);
if(debug_sync_parport) {
printk(KERN_ERR "%s: Using %s, ignore new attachment %s\n",
THIS_MODULE->name, debug_sync_parport->name, port->name);
return;
}
parport_get_port(port);
debug_sync_parport = port;
}
struct pardevice *parport_open (int devnum, const char *name,
int (*pf) (void *), void (*kf) (void *),
void (*irqf) (int, void *, struct pt_regs *),
int flags, void *handle)
{
struct daisydev *p = topology;
struct parport *port;
struct pardevice *dev;
int daisy;
spin_lock(&topology_lock);
while (p && p->devnum != devnum)
p = p->next;
if (!p) {
spin_unlock(&topology_lock);
return NULL;
}
daisy = p->daisy;
port = parport_get_port(p->port);
spin_unlock(&topology_lock);
dev = parport_register_device (port, name, pf, kf,
irqf, flags, handle);
parport_put_port(port);
if (!dev)
return NULL;
dev->daisy = daisy;
/* Check that there really is a device to select. */
if (daisy >= 0) {
int selected;
parport_claim_or_block (dev);
selected = port->daisy;
parport_release (dev);
if (selected != daisy) {
/* No corresponding device. */
parport_unregister_device (dev);
return NULL;
}
}
return dev;
}
struct pardevice *parport_open(int devnum, const char *name)
{
struct daisydev *p = topology;
struct parport *port;
struct pardevice *dev;
int daisy;
spin_lock(&topology_lock);
while (p && p->devnum != devnum)
p = p->next;
if (!p) {
spin_unlock(&topology_lock);
return NULL;
}
daisy = p->daisy;
port = parport_get_port(p->port);
spin_unlock(&topology_lock);
dev = parport_register_device(port, name, NULL, NULL, NULL, 0, NULL);
parport_put_port(port);
if (!dev)
return NULL;
dev->daisy = daisy;
if (daisy >= 0) {
int selected;
parport_claim_or_block(dev);
selected = port->daisy;
parport_release(dev);
if (selected != daisy) {
parport_unregister_device(dev);
return NULL;
}
}
return dev;
}