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/*
* Copyright 2008-2011, IBM Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/smp.h>
#include <linux/delay.h>
#include <linux/time.h>
#include <asm/scom.h>
#include "wsp.h"
#include "ics.h"
#define WSP_SOC_COMPATIBLE "ibm,wsp-soc"
#define PBIC_COMPATIBLE "ibm,wsp-pbic"
#define COPRO_COMPATIBLE "ibm,wsp-coprocessor"
static int __init wsp_probe_buses(void)
{
static __initdata struct of_device_id bus_ids[] = {
/*
* every node in between needs to be here or you won't
* find it
*/
{ .compatible = WSP_SOC_COMPATIBLE, },
{ .compatible = PBIC_COMPATIBLE, },
{ .compatible = COPRO_COMPATIBLE, },
{},
};
of_platform_bus_probe(NULL, bus_ids, NULL);
return 0;
}
void __init wsp_setup_arch(void)
{
/* init to some ~sane value until calibrate_delay() runs */
loops_per_jiffy = 50000000;
scom_init_wsp();
/* Setup SMP callback */
#ifdef CONFIG_SMP
a2_setup_smp();
#endif
#ifdef CONFIG_PCI
wsp_setup_pci();
#endif
}
void __init wsp_setup_irq(void)
{
wsp_init_irq();
opb_pic_init();
}
int __init wsp_probe_devices(void)
{
struct device_node *np;
/* Our RTC is a ds1500. It seems to be programatically compatible
* with the ds1511 for which we have a driver so let's use that
*/
np = of_find_compatible_node(NULL, NULL, "dallas,ds1500");
if (np != NULL) {
struct resource res;
if (of_address_to_resource(np, 0, &res) == 0)
platform_device_register_simple("ds1511", 0, &res, 1);
}
wsp_probe_buses();
return 0;
}
void wsp_halt(void)
{
u64 val;
scom_map_t m;
struct device_node *dn;
struct device_node *mine;
struct device_node *me;
me = of_get_cpu_node(smp_processor_id(), NULL);
mine = scom_find_parent(me);
/* This will halt all the A2s but not power off the chip */
for_each_node_with_property(dn, "scom-controller") {
if (dn == mine)
continue;
m = scom_map(dn, 0, 1);
/* read-modify-write it so the HW probe does not get
* confused */
val = scom_read(m, 0);
val |= 1;
scom_write(m, 0, val);
scom_unmap(m);
}
m = scom_map(mine, 0, 1);
val = scom_read(m, 0);
val |= 1;
scom_write(m, 0, val);
/* should never return */
scom_unmap(m);
}
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