1/*
2 * r8a7790 Power management support
3 *
4 * Copyright (C) 2013  Renesas Electronics Corporation
5 * Copyright (C) 2011  Renesas Solutions Corp.
6 * Copyright (C) 2011  Magnus Damm
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License.  See the file "COPYING" in the main directory of this archive
10 * for more details.
11 */
12
13#include <linux/kernel.h>
14#include <linux/smp.h>
15#include <asm/io.h>
16#include "common.h"
17#include "pm-rcar.h"
18#include "r8a7790.h"
19
20/* RST */
21#define RST		0xe6160000
22#define CA15BAR		0x0020
23#define CA7BAR		0x0030
24#define CA15RESCNT	0x0040
25#define CA7RESCNT	0x0044
26
27/* On-chip RAM */
28#define MERAM          0xe8080000
29
30/* SYSC */
31#define SYSCIER 0x0c
32#define SYSCIMR 0x10
33
34#if defined(CONFIG_SMP)
35
36static void __init r8a7790_sysc_init(void)
37{
38	void __iomem *base = rcar_sysc_init(0xe6180000);
39
40	/* enable all interrupt sources, but do not use interrupt handler */
41	iowrite32(0x0131000e, base + SYSCIER);
42	iowrite32(0, base + SYSCIMR);
43}
44
45#else /* CONFIG_SMP */
46
47static inline void r8a7790_sysc_init(void) {}
48
49#endif /* CONFIG_SMP */
50
51void __init r8a7790_pm_init(void)
52{
53	void __iomem *p;
54	u32 bar;
55	static int once;
56
57	if (once++)
58		return;
59
60	/* MERAM for jump stub, because BAR requires 256KB aligned address */
61	p = ioremap_nocache(MERAM, shmobile_boot_size);
62	memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
63	iounmap(p);
64
65	/* setup reset vectors */
66	p = ioremap_nocache(RST, 0x63);
67	bar = (MERAM >> 8) & 0xfffffc00;
68	writel_relaxed(bar, p + CA15BAR);
69	writel_relaxed(bar, p + CA7BAR);
70	writel_relaxed(bar | 0x10, p + CA15BAR);
71	writel_relaxed(bar | 0x10, p + CA7BAR);
72
73	/* de-assert reset for all CPUs */
74	writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) | 0xa5a50000,
75		       p + CA15RESCNT);
76	writel_relaxed((readl_relaxed(p + CA7RESCNT) & ~0x0f) | 0x5a5a0000,
77		       p + CA7RESCNT);
78	iounmap(p);
79
80	r8a7790_sysc_init();
81	shmobile_smp_apmu_suspend_init();
82}
83