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/* auxio.c: Probing for the Sparc AUXIO register at boot time.
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
*
* Refactoring for unified NCR/PCIO support 2002 Eric Brower (ebrower@usa.net)
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <asm/oplib.h>
#include <asm/io.h>
#include <asm/sbus.h>
#include <asm/ebus.h>
#include <asm/auxio.h>
/* This cannot be static, as it is referenced in entry.S */
void __iomem *auxio_register = NULL;
enum auxio_type {
AUXIO_TYPE_NODEV,
AUXIO_TYPE_SBUS,
AUXIO_TYPE_EBUS
};
static enum auxio_type auxio_devtype = AUXIO_TYPE_NODEV;
static DEFINE_SPINLOCK(auxio_lock);
static void __auxio_sbus_set(u8 bits_on, u8 bits_off)
{
if (auxio_register) {
unsigned char regval;
unsigned long flags;
unsigned char newval;
spin_lock_irqsave(&auxio_lock, flags);
regval = sbus_readb(auxio_register);
newval = regval | bits_on;
newval &= ~bits_off;
newval &= ~AUXIO_AUX1_MASK;
sbus_writeb(newval, auxio_register);
spin_unlock_irqrestore(&auxio_lock, flags);
}
}
static void __auxio_ebus_set(u8 bits_on, u8 bits_off)
{
if (auxio_register) {
unsigned char regval;
unsigned long flags;
unsigned char newval;
spin_lock_irqsave(&auxio_lock, flags);
regval = (u8)readl(auxio_register);
newval = regval | bits_on;
newval &= ~bits_off;
writel((u32)newval, auxio_register);
spin_unlock_irqrestore(&auxio_lock, flags);
}
}
static inline void __auxio_ebus_set_led(int on)
{
(on) ? __auxio_ebus_set(AUXIO_PCIO_LED, 0) :
__auxio_ebus_set(0, AUXIO_PCIO_LED) ;
}
static inline void __auxio_sbus_set_led(int on)
{
(on) ? __auxio_sbus_set(AUXIO_AUX1_LED, 0) :
__auxio_sbus_set(0, AUXIO_AUX1_LED) ;
}
void auxio_set_led(int on)
{
switch(auxio_devtype) {
case AUXIO_TYPE_SBUS:
__auxio_sbus_set_led(on);
break;
case AUXIO_TYPE_EBUS:
__auxio_ebus_set_led(on);
break;
default:
break;
}
}
static inline void __auxio_sbus_set_lte(int on)
{
(on) ? __auxio_sbus_set(AUXIO_AUX1_LTE, 0) :
__auxio_sbus_set(0, AUXIO_AUX1_LTE) ;
}
void auxio_set_lte(int on)
{
switch(auxio_devtype) {
case AUXIO_TYPE_SBUS:
__auxio_sbus_set_lte(on);
break;
case AUXIO_TYPE_EBUS:
/* FALL-THROUGH */
default:
break;
}
}
void __init auxio_probe(void)
{
struct sbus_bus *sbus;
struct sbus_dev *sdev = NULL;
for_each_sbus(sbus) {
for_each_sbusdev(sdev, sbus) {
if(!strcmp(sdev->prom_name, "auxio"))
goto found_sdev;
}
}
found_sdev:
if (sdev) {
auxio_devtype = AUXIO_TYPE_SBUS;
auxio_register = sbus_ioremap(&sdev->resource[0], 0,
sdev->reg_addrs[0].reg_size,
"auxiliaryIO");
}
#ifdef CONFIG_PCI
else {
struct linux_ebus *ebus;
struct linux_ebus_device *edev = NULL;
for_each_ebus(ebus) {
for_each_ebusdev(edev, ebus) {
if (!strcmp(edev->prom_name, "auxio"))
goto ebus_done;
}
}
ebus_done:
if (edev) {
auxio_devtype = AUXIO_TYPE_EBUS;
auxio_register =
ioremap(edev->resource[0].start, sizeof(u32));
}
}
auxio_set_led(AUXIO_LED_ON);
#endif
}
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