1 /* 2 * r8a7779 processor support 3 * 4 * Copyright (C) 2011, 2013 Renesas Solutions Corp. 5 * Copyright (C) 2011 Magnus Damm 6 * Copyright (C) 2013 Cogent Embedded, Inc. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; version 2 of the License. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 */ 17 #include <linux/clk/shmobile.h> 18 #include <linux/clocksource.h> 19 #include <linux/init.h> 20 #include <linux/irq.h> 21 #include <linux/irqchip.h> 22 #include <linux/irqchip/arm-gic.h> 23 24 #include <asm/mach/arch.h> 25 #include <asm/mach/map.h> 26 27 #include "common.h" 28 #include "r8a7779.h" 29 30 static struct map_desc r8a7779_io_desc[] __initdata = { 31 /* 2M identity mapping for 0xf0000000 (MPCORE) */ 32 { 33 .virtual = 0xf0000000, 34 .pfn = __phys_to_pfn(0xf0000000), 35 .length = SZ_2M, 36 .type = MT_DEVICE_NONSHARED 37 }, 38 /* 16M identity mapping for 0xfexxxxxx (DMAC-S/HPBREG/INTC2/LRAM/DBSC) */ 39 { 40 .virtual = 0xfe000000, 41 .pfn = __phys_to_pfn(0xfe000000), 42 .length = SZ_16M, 43 .type = MT_DEVICE_NONSHARED 44 }, 45 }; 46 47 static void __init r8a7779_map_io(void) 48 { 49 debug_ll_io_init(); 50 iotable_init(r8a7779_io_desc, ARRAY_SIZE(r8a7779_io_desc)); 51 } 52 53 /* IRQ */ 54 #define INT2SMSKCR0 IOMEM(0xfe7822a0) 55 #define INT2SMSKCR1 IOMEM(0xfe7822a4) 56 #define INT2SMSKCR2 IOMEM(0xfe7822a8) 57 #define INT2SMSKCR3 IOMEM(0xfe7822ac) 58 #define INT2SMSKCR4 IOMEM(0xfe7822b0) 59 60 #define INT2NTSR0 IOMEM(0xfe700060) 61 #define INT2NTSR1 IOMEM(0xfe700064) 62 63 static void __init r8a7779_init_irq_dt(void) 64 { 65 irqchip_init(); 66 67 /* route all interrupts to ARM */ 68 __raw_writel(0xffffffff, INT2NTSR0); 69 __raw_writel(0x3fffffff, INT2NTSR1); 70 71 /* unmask all known interrupts in INTCS2 */ 72 __raw_writel(0xfffffff0, INT2SMSKCR0); 73 __raw_writel(0xfff7ffff, INT2SMSKCR1); 74 __raw_writel(0xfffbffdf, INT2SMSKCR2); 75 __raw_writel(0xbffffffc, INT2SMSKCR3); 76 __raw_writel(0x003fee3f, INT2SMSKCR4); 77 } 78 79 #define MODEMR 0xffcc0020 80 81 static u32 __init r8a7779_read_mode_pins(void) 82 { 83 static u32 mode; 84 static bool mode_valid; 85 86 if (!mode_valid) { 87 void __iomem *modemr = ioremap_nocache(MODEMR, PAGE_SIZE); 88 BUG_ON(!modemr); 89 mode = ioread32(modemr); 90 iounmap(modemr); 91 mode_valid = true; 92 } 93 94 return mode; 95 } 96 97 static void __init r8a7779_init_time(void) 98 { 99 r8a7779_clocks_init(r8a7779_read_mode_pins()); 100 clocksource_probe(); 101 } 102 103 static const char *const r8a7779_compat_dt[] __initconst = { 104 "renesas,r8a7779", 105 NULL, 106 }; 107 108 DT_MACHINE_START(R8A7779_DT, "Generic R8A7779 (Flattened Device Tree)") 109 .smp = smp_ops(r8a7779_smp_ops), 110 .map_io = r8a7779_map_io, 111 .init_early = shmobile_init_delay, 112 .init_time = r8a7779_init_time, 113 .init_irq = r8a7779_init_irq_dt, 114 .init_late = shmobile_init_late, 115 .dt_compat = r8a7779_compat_dt, 116 MACHINE_END 117