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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)
*/
#include <linux/config.h>
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/smp.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <asm/oplib.h>
#include <asm/io.h>
#include <asm/auxio.h>
#include <asm/sbus.h>
#include <asm/ebus.h>
#include <asm/fhc.h>
/* Probe and map in the Auxiliary I/O register */
unsigned char *auxio_register;
void __init auxio_probe(void)
{
struct linux_sbus *bus;
struct linux_sbus_device *sdev = 0;
struct linux_prom_registers auxregs[1];
for_each_sbus(bus) {
for_each_sbusdev(sdev, bus) {
if(!strcmp(sdev->prom_name, "auxio")) {
break;
}
}
}
if (!sdev) {
#ifdef CONFIG_PCI
struct linux_ebus *ebus;
struct linux_ebus_device *edev = 0;
unsigned long led_auxio;
for_each_ebus(ebus) {
for_each_ebusdev(edev, ebus) {
if (!strcmp(edev->prom_name, "auxio"))
goto ebus_done;
}
}
ebus_done:
if (edev) {
led_auxio = edev->resource[0].start;
outl(0x01, led_auxio);
return;
}
#endif
if(central_bus) {
auxio_register = NULL;
return;
}
prom_printf("Cannot find auxio node, cannot continue...\n");
prom_halt();
}
prom_getproperty(sdev->prom_node, "reg", (char *) auxregs, sizeof(auxregs));
prom_apply_sbus_ranges(sdev->my_bus, auxregs, 0x1, sdev);
/* Map the register both read and write */
auxio_register = (unsigned char *) sparc_alloc_io(auxregs[0].phys_addr, 0,
auxregs[0].reg_size,
"auxiliaryIO",
auxregs[0].which_io, 0x0);
TURN_ON_LED;
}
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