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/platform_data/pinctrl-nomadik.h> 25 #include <linux/random.h> 26 27 #include <asm/pmu.h> 28 #include <asm/mach/map.h> 29 30 #include "setup.h" 31 #include "devices.h" 32 #include "irqs.h" 33 34 #include "devices-db8500.h" 35 #include "db8500-regs.h" 36 #include "board-mop500.h" 37 #include "id.h" 38 39 /* minimum static i/o mapping required to boot U8500 platforms */ 40 static struct map_desc u8500_uart_io_desc[] __initdata = { 41 __IO_DEV_DESC(U8500_UART0_BASE, SZ_4K), 42 __IO_DEV_DESC(U8500_UART2_BASE, SZ_4K), 43 }; 44 /* U8500 and U9540 common io_desc */ 45 static struct map_desc u8500_common_io_desc[] __initdata = { 46 /* SCU base also covers GIC CPU BASE and TWD with its 4K page */ 47 __IO_DEV_DESC(U8500_SCU_BASE, SZ_4K), 48 __IO_DEV_DESC(U8500_GIC_DIST_BASE, SZ_4K), 49 __IO_DEV_DESC(U8500_L2CC_BASE, SZ_4K), 50 __IO_DEV_DESC(U8500_MTU0_BASE, SZ_4K), 51 __IO_DEV_DESC(U8500_BACKUPRAM0_BASE, SZ_8K), 52 53 __IO_DEV_DESC(U8500_CLKRST1_BASE, SZ_4K), 54 __IO_DEV_DESC(U8500_CLKRST2_BASE, SZ_4K), 55 __IO_DEV_DESC(U8500_CLKRST3_BASE, SZ_4K), 56 __IO_DEV_DESC(U8500_CLKRST5_BASE, SZ_4K), 57 __IO_DEV_DESC(U8500_CLKRST6_BASE, SZ_4K), 58 59 __IO_DEV_DESC(U8500_GPIO0_BASE, SZ_4K), 60 __IO_DEV_DESC(U8500_GPIO1_BASE, SZ_4K), 61 __IO_DEV_DESC(U8500_GPIO2_BASE, SZ_4K), 62 __IO_DEV_DESC(U8500_GPIO3_BASE, SZ_4K), 63 }; 64 65 /* U8500 IO map specific description */ 66 static struct map_desc u8500_io_desc[] __initdata = { 67 __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K), 68 __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K), 69 70 }; 71 72 /* U9540 IO map specific description */ 73 static struct map_desc u9540_io_desc[] __initdata = { 74 __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K + SZ_8K), 75 __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K + SZ_8K), 76 }; 77 78 void __init u8500_map_io(void) 79 { 80 /* 81 * Map the UARTs early so that the DEBUG_LL stuff continues to work. 82 */ 83 iotable_init(u8500_uart_io_desc, ARRAY_SIZE(u8500_uart_io_desc)); 84 85 ux500_map_io(); 86 87 iotable_init(u8500_common_io_desc, ARRAY_SIZE(u8500_common_io_desc)); 88 89 if (cpu_is_ux540_family()) 90 iotable_init(u9540_io_desc, ARRAY_SIZE(u9540_io_desc)); 91 else 92 iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc)); 93 } 94 95 /* 96 * The PMU IRQ lines of two cores are wired together into a single interrupt. 97 * Bounce the interrupt to the other core if it's not ours. 98 */ 99 static irqreturn_t db8500_pmu_handler(int irq, void *dev, irq_handler_t handler) 100 { 101 irqreturn_t ret = handler(irq, dev); 102 int other = !smp_processor_id(); 103 104 if (ret == IRQ_NONE && cpu_online(other)) 105 irq_set_affinity(irq, cpumask_of(other)); 106 107 /* 108 * We should be able to get away with the amount of IRQ_NONEs we give, 109 * while still having the spurious IRQ detection code kick in if the 110 * interrupt really starts hitting spuriously. 111 */ 112 return ret; 113 } 114 115 struct arm_pmu_platdata db8500_pmu_platdata = { 116 .handle_irq = db8500_pmu_handler, 117 }; 118 119 static const char *db8500_read_soc_id(void) 120 { 121 void __iomem *uid = __io_address(U8500_BB_UID_BASE); 122 123 /* Throw these device-specific numbers into the entropy pool */ 124 add_device_randomness(uid, 0x14); 125 return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x", 126 readl((u32 *)uid+0), 127 readl((u32 *)uid+1), readl((u32 *)uid+2), 128 readl((u32 *)uid+3), readl((u32 *)uid+4)); 129 } 130 131 static struct device * __init db8500_soc_device_init(void) 132 { 133 const char *soc_id = db8500_read_soc_id(); 134 135 return ux500_soc_device_init(soc_id); 136 } 137 138 #ifdef CONFIG_MACH_UX500_DT 139 static struct of_dev_auxdata u8500_auxdata_lookup[] __initdata = { 140 /* Requires call-back bindings. */ 141 OF_DEV_AUXDATA("arm,cortex-a9-pmu", 0, "arm-pmu", &db8500_pmu_platdata), 142 /* Requires DMA bindings. */ 143 OF_DEV_AUXDATA("arm,pl18x", 0x80126000, "sdi0", &mop500_sdi0_data), 144 OF_DEV_AUXDATA("arm,pl18x", 0x80118000, "sdi1", &mop500_sdi1_data), 145 OF_DEV_AUXDATA("arm,pl18x", 0x80005000, "sdi2", &mop500_sdi2_data), 146 OF_DEV_AUXDATA("arm,pl18x", 0x80114000, "sdi4", &mop500_sdi4_data), 147 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80123000, 148 "ux500-msp-i2s.0", &msp0_platform_data), 149 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80124000, 150 "ux500-msp-i2s.1", &msp1_platform_data), 151 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80117000, 152 "ux500-msp-i2s.2", &msp2_platform_data), 153 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80125000, 154 "ux500-msp-i2s.3", &msp3_platform_data), 155 /* Requires non-DT:able platform data. */ 156 OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu", 157 &db8500_prcmu_pdata), 158 OF_DEV_AUXDATA("stericsson,ux500-cryp", 0xa03cb000, "cryp1", NULL), 159 OF_DEV_AUXDATA("stericsson,ux500-hash", 0xa03c2000, "hash1", NULL), 160 OF_DEV_AUXDATA("stericsson,snd-soc-mop500", 0, "snd-soc-mop500.0", 161 NULL), 162 /* Requires device name bindings. */ 163 OF_DEV_AUXDATA("stericsson,db8500-pinctrl", U8500_PRCMU_BASE, 164 "pinctrl-db8500", NULL), 165 {}, 166 }; 167 168 static struct of_dev_auxdata u8540_auxdata_lookup[] __initdata = { 169 /* Requires DMA bindings. */ 170 OF_DEV_AUXDATA("arm,pl011", 0x80120000, "uart0", NULL), 171 OF_DEV_AUXDATA("arm,pl011", 0x80121000, "uart1", NULL), 172 OF_DEV_AUXDATA("arm,pl011", 0x80007000, "uart2", NULL), 173 OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu", 174 &db8500_prcmu_pdata), 175 {}, 176 }; 177 178 static const struct of_device_id u8500_local_bus_nodes[] = { 179 /* only create devices below soc node */ 180 { .compatible = "stericsson,db8500", }, 181 { .compatible = "stericsson,db8500-prcmu", }, 182 { .compatible = "simple-bus"}, 183 { }, 184 }; 185 186 static void __init u8500_init_machine(void) 187 { 188 struct device *parent = db8500_soc_device_init(); 189 190 /* Pinmaps must be in place before devices register */ 191 if (of_machine_is_compatible("st-ericsson,mop500")) 192 mop500_pinmaps_init(); 193 else if (of_machine_is_compatible("calaosystems,snowball-a9500")) { 194 snowball_pinmaps_init(); 195 } else if (of_machine_is_compatible("st-ericsson,hrefv60+")) 196 hrefv60_pinmaps_init(); 197 else if (of_machine_is_compatible("st-ericsson,ccu9540")) {} 198 /* TODO: Add pinmaps for ccu9540 board. */ 199 200 /* automatically probe child nodes of dbx5x0 devices */ 201 if (of_machine_is_compatible("st-ericsson,u8540")) 202 of_platform_populate(NULL, u8500_local_bus_nodes, 203 u8540_auxdata_lookup, parent); 204 else 205 of_platform_populate(NULL, u8500_local_bus_nodes, 206 u8500_auxdata_lookup, parent); 207 } 208 209 static const char * stericsson_dt_platform_compat[] = { 210 "st-ericsson,u8500", 211 "st-ericsson,u8540", 212 "st-ericsson,u9500", 213 "st-ericsson,u9540", 214 NULL, 215 }; 216 217 DT_MACHINE_START(U8500_DT, "ST-Ericsson Ux5x0 platform (Device Tree Support)") 218 .smp = smp_ops(ux500_smp_ops), 219 .map_io = u8500_map_io, 220 .init_irq = ux500_init_irq, 221 /* we re-use nomadik timer here */ 222 .init_time = ux500_timer_init, 223 .init_machine = u8500_init_machine, 224 .init_late = NULL, 225 .dt_compat = stericsson_dt_platform_compat, 226 .restart = ux500_restart, 227 MACHINE_END 228 229 #endif 230