153 lines
3.1 KiB
C
153 lines
3.1 KiB
C
/* 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 irq.c */
|
|
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_node->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
|
|
}
|