1/* 2 * Copyright (C) 2008-2009 ST-Ericsson SA 3 * 4 * Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2, as 8 * published by the Free Software Foundation. 9 * 10 */ 11#include <linux/types.h> 12#include <linux/init.h> 13#include <linux/device.h> 14#include <linux/amba/bus.h> 15#include <linux/interrupt.h> 16#include <linux/irq.h> 17#include <linux/platform_device.h> 18#include <linux/io.h> 19#include <linux/mfd/abx500/ab8500.h> 20#include <linux/mfd/dbx500-prcmu.h> 21#include <linux/of.h> 22#include <linux/of_platform.h> 23#include <linux/regulator/machine.h> 24#include <linux/random.h> 25 26#include <asm/pmu.h> 27#include <asm/mach/map.h> 28 29#include "setup.h" 30 31#include "board-mop500-regulators.h" 32#include "board-mop500.h" 33#include "db8500-regs.h" 34#include "id.h" 35 36static struct ab8500_platform_data ab8500_platdata = { 37 .regulator = &ab8500_regulator_plat_data, 38}; 39 40static struct prcmu_pdata db8500_prcmu_pdata = { 41 .ab_platdata = &ab8500_platdata, 42 .version_offset = DB8500_PRCMU_FW_VERSION_OFFSET, 43 .legacy_offset = DB8500_PRCMU_LEGACY_OFFSET, 44}; 45 46/* minimum static i/o mapping required to boot U8500 platforms */ 47static struct map_desc u8500_uart_io_desc[] __initdata = { 48 __IO_DEV_DESC(U8500_UART0_BASE, SZ_4K), 49 __IO_DEV_DESC(U8500_UART2_BASE, SZ_4K), 50}; 51/* U8500 and U9540 common io_desc */ 52static struct map_desc u8500_common_io_desc[] __initdata = { 53 /* SCU base also covers GIC CPU BASE and TWD with its 4K page */ 54 __IO_DEV_DESC(U8500_SCU_BASE, SZ_4K), 55 __IO_DEV_DESC(U8500_GIC_DIST_BASE, SZ_4K), 56 __IO_DEV_DESC(U8500_L2CC_BASE, SZ_4K), 57 __IO_DEV_DESC(U8500_MTU0_BASE, SZ_4K), 58 __IO_DEV_DESC(U8500_BACKUPRAM0_BASE, SZ_8K), 59 60 __IO_DEV_DESC(U8500_CLKRST1_BASE, SZ_4K), 61 __IO_DEV_DESC(U8500_CLKRST2_BASE, SZ_4K), 62 __IO_DEV_DESC(U8500_CLKRST3_BASE, SZ_4K), 63 __IO_DEV_DESC(U8500_CLKRST5_BASE, SZ_4K), 64 __IO_DEV_DESC(U8500_CLKRST6_BASE, SZ_4K), 65 66 __IO_DEV_DESC(U8500_GPIO0_BASE, SZ_4K), 67 __IO_DEV_DESC(U8500_GPIO1_BASE, SZ_4K), 68 __IO_DEV_DESC(U8500_GPIO2_BASE, SZ_4K), 69 __IO_DEV_DESC(U8500_GPIO3_BASE, SZ_4K), 70}; 71 72/* U8500 IO map specific description */ 73static struct map_desc u8500_io_desc[] __initdata = { 74 __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K), 75 __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K), 76 77}; 78 79/* U9540 IO map specific description */ 80static struct map_desc u9540_io_desc[] __initdata = { 81 __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K + SZ_8K), 82 __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K + SZ_8K), 83}; 84 85static void __init u8500_map_io(void) 86{ 87 /* 88 * Map the UARTs early so that the DEBUG_LL stuff continues to work. 89 */ 90 iotable_init(u8500_uart_io_desc, ARRAY_SIZE(u8500_uart_io_desc)); 91 92 ux500_map_io(); 93 94 iotable_init(u8500_common_io_desc, ARRAY_SIZE(u8500_common_io_desc)); 95 96 if (cpu_is_ux540_family()) 97 iotable_init(u9540_io_desc, ARRAY_SIZE(u9540_io_desc)); 98 else 99 iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc)); 100} 101 102/* 103 * The PMU IRQ lines of two cores are wired together into a single interrupt. 104 * Bounce the interrupt to the other core if it's not ours. 105 */ 106static irqreturn_t db8500_pmu_handler(int irq, void *dev, irq_handler_t handler) 107{ 108 irqreturn_t ret = handler(irq, dev); 109 int other = !smp_processor_id(); 110 111 if (ret == IRQ_NONE && cpu_online(other)) 112 irq_set_affinity(irq, cpumask_of(other)); 113 114 /* 115 * We should be able to get away with the amount of IRQ_NONEs we give, 116 * while still having the spurious IRQ detection code kick in if the 117 * interrupt really starts hitting spuriously. 118 */ 119 return ret; 120} 121 122static struct arm_pmu_platdata db8500_pmu_platdata = { 123 .handle_irq = db8500_pmu_handler, 124}; 125 126static const char *db8500_read_soc_id(void) 127{ 128 void __iomem *uid = __io_address(U8500_BB_UID_BASE); 129 130 /* Throw these device-specific numbers into the entropy pool */ 131 add_device_randomness(uid, 0x14); 132 return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x", 133 readl((u32 *)uid+0), 134 readl((u32 *)uid+1), readl((u32 *)uid+2), 135 readl((u32 *)uid+3), readl((u32 *)uid+4)); 136} 137 138static struct device * __init db8500_soc_device_init(void) 139{ 140 const char *soc_id = db8500_read_soc_id(); 141 142 return ux500_soc_device_init(soc_id); 143} 144 145static struct of_dev_auxdata u8500_auxdata_lookup[] __initdata = { 146 /* Requires call-back bindings. */ 147 OF_DEV_AUXDATA("arm,cortex-a9-pmu", 0, "arm-pmu", &db8500_pmu_platdata), 148 /* Requires DMA bindings. */ 149 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80123000, 150 "ux500-msp-i2s.0", &msp0_platform_data), 151 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80124000, 152 "ux500-msp-i2s.1", &msp1_platform_data), 153 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80117000, 154 "ux500-msp-i2s.2", &msp2_platform_data), 155 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80125000, 156 "ux500-msp-i2s.3", &msp3_platform_data), 157 /* Requires non-DT:able platform data. */ 158 OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu", 159 &db8500_prcmu_pdata), 160 OF_DEV_AUXDATA("stericsson,ux500-cryp", 0xa03cb000, "cryp1", NULL), 161 OF_DEV_AUXDATA("stericsson,ux500-hash", 0xa03c2000, "hash1", NULL), 162 OF_DEV_AUXDATA("stericsson,snd-soc-mop500", 0, "snd-soc-mop500.0", 163 NULL), 164 {}, 165}; 166 167static struct of_dev_auxdata u8540_auxdata_lookup[] __initdata = { 168 OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu", 169 &db8500_prcmu_pdata), 170 {}, 171}; 172 173static const struct of_device_id u8500_local_bus_nodes[] = { 174 /* only create devices below soc node */ 175 { .compatible = "stericsson,db8500", }, 176 { .compatible = "stericsson,db8500-prcmu", }, 177 { .compatible = "simple-bus"}, 178 { }, 179}; 180 181static void __init u8500_init_machine(void) 182{ 183 struct device *parent = db8500_soc_device_init(); 184 185 /* automatically probe child nodes of dbx5x0 devices */ 186 if (of_machine_is_compatible("st-ericsson,u8540")) 187 of_platform_populate(NULL, u8500_local_bus_nodes, 188 u8540_auxdata_lookup, parent); 189 else 190 of_platform_populate(NULL, u8500_local_bus_nodes, 191 u8500_auxdata_lookup, parent); 192} 193 194static const char * stericsson_dt_platform_compat[] = { 195 "st-ericsson,u8500", 196 "st-ericsson,u8540", 197 "st-ericsson,u9500", 198 "st-ericsson,u9540", 199 NULL, 200}; 201 202DT_MACHINE_START(U8500_DT, "ST-Ericsson Ux5x0 platform (Device Tree Support)") 203 .smp = smp_ops(ux500_smp_ops), 204 .map_io = u8500_map_io, 205 .init_irq = ux500_init_irq, 206 /* we re-use nomadik timer here */ 207 .init_time = ux500_timer_init, 208 .init_machine = u8500_init_machine, 209 .init_late = NULL, 210 .dt_compat = stericsson_dt_platform_compat, 211 .restart = ux500_restart, 212MACHINE_END 213