static void __exit d7s_cleanup(void)
{
int regs = readb(d7s_regs);
/* Honor OBP d7s-flipped? unless operating in solaris-compat mode */
if (0 == sol_compat) {
(0 == d7s_obpflipped()) ?
writeb(regs |= D7S_FLIP, d7s_regs):
writeb(regs &= ~D7S_FLIP, d7s_regs);
}
misc_deregister(&d7s_miscdev);
d7s_free();
}
static int d7s_release(struct inode *inode, struct file *f)
{
/* Reset flipped state to OBP default only if
* no other users have the device open and we
* are not operating in solaris-compat mode
*/
if (atomic_dec_and_test(&d7s_users) && !sol_compat) {
int regval = 0;
regval = readb(d7s_regs);
(0 == d7s_obpflipped()) ?
writeb(regval |= D7S_FLIP, d7s_regs):
writeb(regval &= ~D7S_FLIP, d7s_regs);
}
return 0;
}
static int __init d7s_init(void)
{
struct linux_ebus *ebus = NULL;
struct linux_ebus_device *edev = NULL;
int iTmp = 0, regs = 0;
for_each_ebus(ebus) {
for_each_ebusdev(edev, ebus) {
if (!strcmp(edev->prom_node->name, D7S_OBPNAME))
goto ebus_done;
}
}
ebus_done:
if(!edev) {
printk("%s: unable to locate device\n", D7S_DEVNAME);
return -ENODEV;
}
d7s_regs = ioremap(edev->resource[0].start, sizeof(__u8));
iTmp = misc_register(&d7s_miscdev);
if (0 != iTmp) {
printk("%s: unable to acquire miscdevice minor %i\n",
D7S_DEVNAME, D7S_MINOR);
iounmap(d7s_regs);
return iTmp;
}
/* OBP option "d7s-flipped?" is honored as default
* for the device, and reset default when detached
*/
regs = readb(d7s_regs);
iTmp = d7s_obpflipped();
(0 == iTmp) ?
writeb(regs |= D7S_FLIP, d7s_regs):
writeb(regs &= ~D7S_FLIP, d7s_regs);
printk("%s: 7-Segment Display%s at 0x%lx %s\n",
D7S_DEVNAME,
(0 == iTmp) ? (" (FLIPPED)") : (""),
edev->resource[0].start,
(0 != sol_compat) ? ("in sol_compat mode") : (""));
return 0;
}
static int d7s_release(struct inode *inode, struct file *f)
{
if (D7S_MINOR != minor(inode->i_rdev))
return -ENODEV;
MOD_DEC_USE_COUNT;
/* Reset flipped state to OBP default only if
* no other users have the device open and we
* are not operating in solaris-compat mode
*/
if (0 == MOD_IN_USE && 0 == sol_compat) {
int regval = 0;
regval = readb(d7s_regs);
(0 == d7s_obpflipped()) ?
writeb(regval |= D7S_FLIP, d7s_regs):
writeb(regval &= ~D7S_FLIP, d7s_regs);
}
return 0;
}
