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Gaku Inamia8caad62015-03-16 14:48:43 +09001/*
2 * R-Car Generation 2 Power management support
3 *
4 * Copyright (C) 2013 - 2015 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/of.h>
15#include <linux/smp.h>
Geert Uytterhoevenbe32bcb2016-04-20 14:02:36 +020016#include <linux/soc/renesas/rcar-sysc.h>
Gaku Inamia8caad62015-03-16 14:48:43 +090017#include <asm/io.h>
18#include "common.h"
Gaku Inamia8caad62015-03-16 14:48:43 +090019#include "rcar-gen2.h"
20
21/* RST */
22#define RST 0xe6160000
23#define CA15BAR 0x0020
24#define CA7BAR 0x0030
25#define CA15RESCNT 0x0040
26#define CA7RESCNT 0x0044
27
28/* On-chip RAM */
Geert Uytterhoevenc94bc812016-05-17 17:15:33 +020029#define ICRAM1 0xe63c0000 /* Inter Connect RAM1 (4 KiB) */
Gaku Inamia8caad62015-03-16 14:48:43 +090030
31/* SYSC */
32#define SYSCIER 0x0c
33#define SYSCIMR 0x10
34
35#if defined(CONFIG_SMP)
36
37static void __init rcar_gen2_sysc_init(u32 syscier)
38{
Geert Uytterhoeven05323992016-06-28 16:10:33 +020039 rcar_sysc_init(0xe6180000, syscier);
Gaku Inamia8caad62015-03-16 14:48:43 +090040}
41
42#else /* CONFIG_SMP */
43
44static inline void rcar_gen2_sysc_init(u32 syscier) {}
45
46#endif /* CONFIG_SMP */
47
48void __init rcar_gen2_pm_init(void)
49{
50 void __iomem *p;
51 u32 bar;
52 static int once;
53 struct device_node *np, *cpus;
54 bool has_a7 = false;
55 bool has_a15 = false;
Geert Uytterhoevenc94bc812016-05-17 17:15:33 +020056 phys_addr_t boot_vector_addr = ICRAM1;
Gaku Inamia8caad62015-03-16 14:48:43 +090057 u32 syscier = 0;
58
59 if (once++)
60 return;
61
62 cpus = of_find_node_by_path("/cpus");
63 if (!cpus)
64 return;
65
66 for_each_child_of_node(cpus, np) {
67 if (of_device_is_compatible(np, "arm,cortex-a15"))
68 has_a15 = true;
69 else if (of_device_is_compatible(np, "arm,cortex-a7"))
70 has_a7 = true;
71 }
72
Geert Uytterhoevenc94bc812016-05-17 17:15:33 +020073 if (of_machine_is_compatible("renesas,r8a7790"))
Gaku Inamia8caad62015-03-16 14:48:43 +090074 syscier = 0x013111ef;
Geert Uytterhoevenc94bc812016-05-17 17:15:33 +020075 else if (of_machine_is_compatible("renesas,r8a7791"))
Gaku Inamia8caad62015-03-16 14:48:43 +090076 syscier = 0x00111003;
Gaku Inamia8caad62015-03-16 14:48:43 +090077
78 /* RAM for jump stub, because BAR requires 256KB aligned address */
79 p = ioremap_nocache(boot_vector_addr, shmobile_boot_size);
80 memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
81 iounmap(p);
82
83 /* setup reset vectors */
84 p = ioremap_nocache(RST, 0x63);
85 bar = (boot_vector_addr >> 8) & 0xfffffc00;
86 if (has_a15) {
87 writel_relaxed(bar, p + CA15BAR);
88 writel_relaxed(bar | 0x10, p + CA15BAR);
89
90 /* de-assert reset for CA15 CPUs */
91 writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) |
92 0xa5a50000, p + CA15RESCNT);
93 }
94 if (has_a7) {
95 writel_relaxed(bar, p + CA7BAR);
96 writel_relaxed(bar | 0x10, p + CA7BAR);
97
98 /* de-assert reset for CA7 CPUs */
99 writel_relaxed((readl_relaxed(p + CA7RESCNT) & ~0x0f) |
100 0x5a5a0000, p + CA7RESCNT);
101 }
102 iounmap(p);
103
104 rcar_gen2_sysc_init(syscier);
105 shmobile_smp_apmu_suspend_init();
106}