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