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/*
* R-Car Generation 2 Power management support
*
* Copyright (C) 2013 - 2015 Renesas Electronics Corporation
* Copyright (C) 2011 Renesas Solutions Corp.
* Copyright (C) 2011 Magnus Damm
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/smp.h>
#include <linux/soc/renesas/rcar-sysc.h>
#include <asm/io.h>
#include "common.h"
#include "rcar-gen2.h"
/* RST */
#define RST 0xe6160000
#define CA15BAR 0x0020
#define CA7BAR 0x0030
#define CA15RESCNT 0x0040
#define CA7RESCNT 0x0044
/* On-chip RAM */
#define ICRAM1 0xe63c0000 /* Inter Connect RAM1 (4 KiB) */
/* SYSC */
#define SYSCIER 0x0c
#define SYSCIMR 0x10
#if defined(CONFIG_SMP)
static void __init rcar_gen2_sysc_init(u32 syscier)
{
void __iomem *base = rcar_sysc_init(0xe6180000);
/* enable all interrupt sources, but do not use interrupt handler */
iowrite32(syscier, base + SYSCIER);
iowrite32(0, base + SYSCIMR);
}
#else /* CONFIG_SMP */
static inline void rcar_gen2_sysc_init(u32 syscier) {}
#endif /* CONFIG_SMP */
void __init rcar_gen2_pm_init(void)
{
void __iomem *p;
u32 bar;
static int once;
struct device_node *np, *cpus;
bool has_a7 = false;
bool has_a15 = false;
phys_addr_t boot_vector_addr = ICRAM1;
u32 syscier = 0;
if (once++)
return;
cpus = of_find_node_by_path("/cpus");
if (!cpus)
return;
for_each_child_of_node(cpus, np) {
if (of_device_is_compatible(np, "arm,cortex-a15"))
has_a15 = true;
else if (of_device_is_compatible(np, "arm,cortex-a7"))
has_a7 = true;
}
if (of_machine_is_compatible("renesas,r8a7790"))
syscier = 0x013111ef;
else if (of_machine_is_compatible("renesas,r8a7791"))
syscier = 0x00111003;
/* RAM for jump stub, because BAR requires 256KB aligned address */
p = ioremap_nocache(boot_vector_addr, shmobile_boot_size);
memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
iounmap(p);
/* setup reset vectors */
p = ioremap_nocache(RST, 0x63);
bar = (boot_vector_addr >> 8) & 0xfffffc00;
if (has_a15) {
writel_relaxed(bar, p + CA15BAR);
writel_relaxed(bar | 0x10, p + CA15BAR);
/* de-assert reset for CA15 CPUs */
writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) |
0xa5a50000, p + CA15RESCNT);
}
if (has_a7) {
writel_relaxed(bar, p + CA7BAR);
writel_relaxed(bar | 0x10, p + CA7BAR);
/* de-assert reset for CA7 CPUs */
writel_relaxed((readl_relaxed(p + CA7RESCNT) & ~0x0f) |
0x5a5a0000, p + CA7RESCNT);
}
iounmap(p);
rcar_gen2_sysc_init(syscier);
shmobile_smp_apmu_suspend_init();
}
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