1 /* 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> 16 #include <asm/io.h> 17 #include "common.h" 18 #include "pm-rcar.h" 19 #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 */ 29 #define MERAM 0xe8080000 30 #define RAM 0xe6300000 31 32 /* SYSC */ 33 #define SYSCIER 0x0c 34 #define SYSCIMR 0x10 35 36 #if defined(CONFIG_SMP) 37 38 static void __init rcar_gen2_sysc_init(u32 syscier) 39 { 40 void __iomem *base = rcar_sysc_init(0xe6180000); 41 42 /* enable all interrupt sources, but do not use interrupt handler */ 43 iowrite32(syscier, base + SYSCIER); 44 iowrite32(0, base + SYSCIMR); 45 } 46 47 #else /* CONFIG_SMP */ 48 49 static inline void rcar_gen2_sysc_init(u32 syscier) {} 50 51 #endif /* CONFIG_SMP */ 52 53 void __init rcar_gen2_pm_init(void) 54 { 55 void __iomem *p; 56 u32 bar; 57 static int once; 58 struct device_node *np, *cpus; 59 bool has_a7 = false; 60 bool has_a15 = false; 61 phys_addr_t boot_vector_addr = 0; 62 u32 syscier = 0; 63 64 if (once++) 65 return; 66 67 cpus = of_find_node_by_path("/cpus"); 68 if (!cpus) 69 return; 70 71 for_each_child_of_node(cpus, np) { 72 if (of_device_is_compatible(np, "arm,cortex-a15")) 73 has_a15 = true; 74 else if (of_device_is_compatible(np, "arm,cortex-a7")) 75 has_a7 = true; 76 } 77 78 if (of_machine_is_compatible("renesas,r8a7790")) { 79 boot_vector_addr = MERAM; 80 syscier = 0x013111ef; 81 82 } else if (of_machine_is_compatible("renesas,r8a7791")) { 83 boot_vector_addr = RAM; 84 syscier = 0x00111003; 85 } 86 87 /* RAM for jump stub, because BAR requires 256KB aligned address */ 88 p = ioremap_nocache(boot_vector_addr, shmobile_boot_size); 89 memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size); 90 iounmap(p); 91 92 /* setup reset vectors */ 93 p = ioremap_nocache(RST, 0x63); 94 bar = (boot_vector_addr >> 8) & 0xfffffc00; 95 if (has_a15) { 96 writel_relaxed(bar, p + CA15BAR); 97 writel_relaxed(bar | 0x10, p + CA15BAR); 98 99 /* de-assert reset for CA15 CPUs */ 100 writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) | 101 0xa5a50000, p + CA15RESCNT); 102 } 103 if (has_a7) { 104 writel_relaxed(bar, p + CA7BAR); 105 writel_relaxed(bar | 0x10, p + CA7BAR); 106 107 /* de-assert reset for CA7 CPUs */ 108 writel_relaxed((readl_relaxed(p + CA7RESCNT) & ~0x0f) | 109 0x5a5a0000, p + CA7RESCNT); 110 } 111 iounmap(p); 112 113 rcar_gen2_sysc_init(syscier); 114 shmobile_smp_apmu_suspend_init(); 115 } 116