int lp_init(void)
{
int offset = 0;
int count = 0;
#ifdef MODULE
int failed = 0;
#endif
if (register_chrdev(LP_MAJOR,"lp",&lp_fops)) {
printk("lp: unable to get major %d\n", LP_MAJOR);
return -EIO;
}
#ifdef MODULE
/* When user feeds parameters, use them */
for (offset=0; offset < LP_NO; offset++) {
int specified=0;
if (io[offset] != 0) {
LP_B(offset) = io[offset];
specified++;
}
if (irq[offset] != 0) {
LP_IRQ(offset) = irq[offset];
specified++;
}
if (specified) {
if (lp_probe(offset) <= 0) {
printk(KERN_INFO "lp%d: Not found\n", offset);
failed++;
} else
count++;
}
}
/* Successful specified devices increase count
* Unsuccessful specified devices increase failed
*/
if (count)
return 0;
if (failed) {
printk(KERN_INFO "lp: No override devices found.\n");
unregister_chrdev(LP_MAJOR,"lp");
return -EIO;
}
/* Only get here if there were no specified devices. To continue
* would be silly since the above code has scribbled all over the
* probe list.
*/
#endif
/* take on all known port values */
for (offset = 0; offset < LP_NO; offset++) {
int ret = lp_probe(offset);
if (ret < 0)
continue;
count += ret;
}
if (count == 0)
printk("lp: Driver configured but no interfaces found.\n");
return 0;
}
void lp_init(void)
{
register struct lp_info *lp = &ports[0];
register char *ip;
int count = 0;
#ifdef BIOS_PORTS
/* only ports 0, 1, 2 and 3 may exist according to RB's intlist */
for (ip = 0; ((int)ip) < LP_PORTS; ip++) {
/* 8 is offset for LPT info, 2 bytes for each entry */
lp->io = (char *)peekw(0x40, (__u16) (2 * ((int)ip) + 8));
/* returns 0 if port wasn't detected by BIOS at bootup */
if (!lp->io)
break; /* there can be no more ports */
printk("lp%d at 0x%x, using polling driver\n", (int)ip, lp->io);
lp->flags = LP_EXIST;
lp++;
}
count = (int)ip;
#else
/* probe for ports */
for (ip = 0; ((int)ip) < LP_PORTS; ip++) {
if (!lp_probe(lp)) {
printk("lp%d at 0x%x, using polling driver\n", (int)ip, lp->io);
port_order[count] = (int)ip;
count++;
}
lp++;
}
#endif
if (count == 0)
printk("lp: no ports found\n");
/* register device */
if (register_chrdev(LP_MAJOR, LP_DEVICE_NAME, &lp_fops))
printk("lp: unable to register\n");
}
