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/*
* (Hisilicon's Hi36xx/Hi37xx SoC based) flattened device tree enabled machine
*
* Copyright (c) 2012-2013 Linaro Ltd.
*
* Haojian Zhuang <haojian.zhuang@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/smp.h>
#include <asm/hardware/arm_timer.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/hardware/gic.h>
#include <asm/hardware/timer-sp.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
#include <asm/smp_plat.h>
#include <asm/proc-fns.h>
#include <asm/smp_twd.h>
#include "core.h"
void __iomem *hs_sctrl_base;
static int hs_smp_reg;
static int hs_reboot_reg;
static void __init hs_map_io(void)
{
struct device_node *np;
np = of_find_compatible_node(NULL, NULL, "hisilicon,sysctrl");
hs_sctrl_base = of_iomap(np, 0);
of_property_read_u32(np, "smp_reg", &hs_smp_reg);
of_property_read_u32(np, "reboot_reg", &hs_reboot_reg);
}
void hs_set_cpu_jump(int cpu, void *jump_addr)
{
int offset = hs_smp_reg;
cpu = cpu_logical_map(cpu);
if (cpu > 0)
offset += 0x04 * (cpu - 1);
writel(virt_to_phys(jump_addr), hs_sctrl_base + offset);
}
static struct of_device_id hs_timer_match[] __initdata = {
{ .compatible = "arm,sp804", },
{}
};
static struct clk_lookup sp804_lookup = {
.dev_id = "sp804",
.clk = NULL,
};
static void __init hs_timer_init(void)
{
struct device_node *node = NULL;
void __iomem *base;
int irq;
hs_init_clocks();
node = of_find_matching_node(NULL, hs_timer_match);
WARN_ON(!node);
if (!node) {
pr_err("Failed to find sp804 timer\n");
return;
}
base = of_iomap(node, 0);
WARN_ON(!base);
/* timer0 is used as clock event, and timer1 is clock source. */
irq = irq_of_parse_and_map(node, 0);
WARN_ON(!irq);
sp804_lookup.clk = of_clk_get(node, 0);
clkdev_add(&sp804_lookup);
sp804_clocksource_and_sched_clock_init(base + TIMER_2_BASE, "timer1");
sp804_clockevents_init(base, irq, "timer0");
twd_local_timer_of_register();
}
static struct sys_timer hs_timer = {
.init = hs_timer_init,
};
static struct of_device_id hs_irq_match[] __initdata = {
{ .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
{}
};
static struct of_device_id hs_l2cache_match[] __initdata = {
{ .compatible = "arm,pl310-cache", },
{}
};
static void __init hs_irq_init(void)
{
struct device_node *node;
int ret;
u32 data[2];
hs_map_io();
of_irq_init(hs_irq_match);
node = of_find_matching_node(NULL, hs_l2cache_match);
WARN_ON(!node);
if (!node) {
pr_err("Failed to find l2cache\n");
return;
}
ret = of_property_read_u32_array(node, "hisilicon,l2cache-aux",
&data[0], 2);
if (ret < 0) {
data[0] = 0;
data[1] = ~0UL;
}
l2x0_of_init(data[0], data[1]);
}
static void __init hs_init(void)
{
hs_hotplug_init();
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
static const char *hs_compat[] __initdata = {
"hisilicon,hi3620-hi4511",
"hisilicon,hi3716",
NULL,
};
void hs_restart(char mode, const char *cmd)
{
writel(0xdeadbeef, hs_sctrl_base + hs_reboot_reg);
while (1)
cpu_do_idle();
}
DT_MACHINE_START(HS_DT, "Hisilicon Hi36xx/Hi37xx (Flattened Device Tree)")
/* Maintainer: Haojian Zhuang <haojian.zhuang@linaro.org> */
.smp = smp_ops(hs_smp_ops),
.map_io = debug_ll_io_init,
.init_irq = hs_irq_init,
.timer = &hs_timer,
.init_machine = hs_init,
.handle_irq = gic_handle_irq,
.dt_compat = hs_compat,
.restart = hs_restart,
MACHINE_END
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