cpu-db8500.c revision 0117f7c7a3e8cdf72bea7d463b142db35e9c9cdc
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#include <asm/mach/arch.h> 30 31#include "setup.h" 32#include "devices.h" 33#include "irqs.h" 34 35#include "devices-db8500.h" 36#include "ste-dma40-db8500.h" 37#include "db8500-regs.h" 38#include "board-mop500.h" 39#include "id.h" 40 41/* minimum static i/o mapping required to boot U8500 platforms */ 42static struct map_desc u8500_uart_io_desc[] __initdata = { 43 __IO_DEV_DESC(U8500_UART0_BASE, SZ_4K), 44 __IO_DEV_DESC(U8500_UART2_BASE, SZ_4K), 45}; 46/* U8500 and U9540 common io_desc */ 47static struct map_desc u8500_common_io_desc[] __initdata = { 48 /* SCU base also covers GIC CPU BASE and TWD with its 4K page */ 49 __IO_DEV_DESC(U8500_SCU_BASE, SZ_4K), 50 __IO_DEV_DESC(U8500_GIC_DIST_BASE, SZ_4K), 51 __IO_DEV_DESC(U8500_L2CC_BASE, SZ_4K), 52 __IO_DEV_DESC(U8500_MTU0_BASE, SZ_4K), 53 __IO_DEV_DESC(U8500_BACKUPRAM0_BASE, SZ_8K), 54 55 __IO_DEV_DESC(U8500_CLKRST1_BASE, SZ_4K), 56 __IO_DEV_DESC(U8500_CLKRST2_BASE, SZ_4K), 57 __IO_DEV_DESC(U8500_CLKRST3_BASE, SZ_4K), 58 __IO_DEV_DESC(U8500_CLKRST5_BASE, SZ_4K), 59 __IO_DEV_DESC(U8500_CLKRST6_BASE, SZ_4K), 60 61 __IO_DEV_DESC(U8500_GPIO0_BASE, SZ_4K), 62 __IO_DEV_DESC(U8500_GPIO1_BASE, SZ_4K), 63 __IO_DEV_DESC(U8500_GPIO2_BASE, SZ_4K), 64 __IO_DEV_DESC(U8500_GPIO3_BASE, SZ_4K), 65}; 66 67/* U8500 IO map specific description */ 68static struct map_desc u8500_io_desc[] __initdata = { 69 __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K), 70 __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K), 71 72}; 73 74/* U9540 IO map specific description */ 75static struct map_desc u9540_io_desc[] __initdata = { 76 __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K + SZ_8K), 77 __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K + SZ_8K), 78}; 79 80void __init u8500_map_io(void) 81{ 82 /* 83 * Map the UARTs early so that the DEBUG_LL stuff continues to work. 84 */ 85 iotable_init(u8500_uart_io_desc, ARRAY_SIZE(u8500_uart_io_desc)); 86 87 ux500_map_io(); 88 89 iotable_init(u8500_common_io_desc, ARRAY_SIZE(u8500_common_io_desc)); 90 91 if (cpu_is_ux540_family()) 92 iotable_init(u9540_io_desc, ARRAY_SIZE(u9540_io_desc)); 93 else 94 iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc)); 95} 96 97static struct resource db8500_pmu_resources[] = { 98 [0] = { 99 .start = IRQ_DB8500_PMU, 100 .end = IRQ_DB8500_PMU, 101 .flags = IORESOURCE_IRQ, 102 }, 103}; 104 105/* 106 * The PMU IRQ lines of two cores are wired together into a single interrupt. 107 * Bounce the interrupt to the other core if it's not ours. 108 */ 109static irqreturn_t db8500_pmu_handler(int irq, void *dev, irq_handler_t handler) 110{ 111 irqreturn_t ret = handler(irq, dev); 112 int other = !smp_processor_id(); 113 114 if (ret == IRQ_NONE && cpu_online(other)) 115 irq_set_affinity(irq, cpumask_of(other)); 116 117 /* 118 * We should be able to get away with the amount of IRQ_NONEs we give, 119 * while still having the spurious IRQ detection code kick in if the 120 * interrupt really starts hitting spuriously. 121 */ 122 return ret; 123} 124 125struct arm_pmu_platdata db8500_pmu_platdata = { 126 .handle_irq = db8500_pmu_handler, 127}; 128 129static struct platform_device db8500_pmu_device = { 130 .name = "arm-pmu", 131 .id = -1, 132 .num_resources = ARRAY_SIZE(db8500_pmu_resources), 133 .resource = db8500_pmu_resources, 134 .dev.platform_data = &db8500_pmu_platdata, 135}; 136 137static struct platform_device *platform_devs[] __initdata = { 138 &u8500_dma40_device, 139 &db8500_pmu_device, 140}; 141 142static resource_size_t __initdata db8500_gpio_base[] = { 143 U8500_GPIOBANK0_BASE, 144 U8500_GPIOBANK1_BASE, 145 U8500_GPIOBANK2_BASE, 146 U8500_GPIOBANK3_BASE, 147 U8500_GPIOBANK4_BASE, 148 U8500_GPIOBANK5_BASE, 149 U8500_GPIOBANK6_BASE, 150 U8500_GPIOBANK7_BASE, 151 U8500_GPIOBANK8_BASE, 152}; 153 154static void __init db8500_add_gpios(struct device *parent) 155{ 156 struct nmk_gpio_platform_data pdata = { 157 .supports_sleepmode = true, 158 }; 159 160 dbx500_add_gpios(parent, ARRAY_AND_SIZE(db8500_gpio_base), 161 IRQ_DB8500_GPIO0, &pdata); 162 dbx500_add_pinctrl(parent, "pinctrl-db8500", U8500_PRCMU_BASE); 163} 164 165static int usb_db8500_dma_cfg[] = { 166 DB8500_DMA_DEV38_USB_OTG_IEP_AND_OEP_1_9, 167 DB8500_DMA_DEV37_USB_OTG_IEP_AND_OEP_2_10, 168 DB8500_DMA_DEV36_USB_OTG_IEP_AND_OEP_3_11, 169 DB8500_DMA_DEV19_USB_OTG_IEP_AND_OEP_4_12, 170 DB8500_DMA_DEV18_USB_OTG_IEP_AND_OEP_5_13, 171 DB8500_DMA_DEV17_USB_OTG_IEP_AND_OEP_6_14, 172 DB8500_DMA_DEV16_USB_OTG_IEP_AND_OEP_7_15, 173 DB8500_DMA_DEV39_USB_OTG_IEP_AND_OEP_8 174}; 175 176static const char *db8500_read_soc_id(void) 177{ 178 void __iomem *uid = __io_address(U8500_BB_UID_BASE); 179 180 /* Throw these device-specific numbers into the entropy pool */ 181 add_device_randomness(uid, 0x14); 182 return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x", 183 readl((u32 *)uid+0), 184 readl((u32 *)uid+1), readl((u32 *)uid+2), 185 readl((u32 *)uid+3), readl((u32 *)uid+4)); 186} 187 188static struct device * __init db8500_soc_device_init(void) 189{ 190 const char *soc_id = db8500_read_soc_id(); 191 192 return ux500_soc_device_init(soc_id); 193} 194 195/* 196 * This function is called from the board init 197 */ 198struct device * __init u8500_init_devices(struct ab8500_platform_data *ab8500) 199{ 200 struct device *parent; 201 int i; 202 203 parent = db8500_soc_device_init(); 204 205 db8500_add_rtc(parent); 206 db8500_add_gpios(parent); 207 db8500_add_usb(parent, usb_db8500_dma_cfg, usb_db8500_dma_cfg); 208 209 for (i = 0; i < ARRAY_SIZE(platform_devs); i++) 210 platform_devs[i]->dev.parent = parent; 211 212 db8500_prcmu_device.dev.platform_data = ab8500; 213 214 platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs)); 215 216 return parent; 217} 218 219#ifdef CONFIG_MACH_UX500_DT 220static struct of_dev_auxdata u8500_auxdata_lookup[] __initdata = { 221 /* Requires call-back bindings. */ 222 OF_DEV_AUXDATA("arm,cortex-a9-pmu", 0, "arm-pmu", &db8500_pmu_platdata), 223 /* Requires DMA bindings. */ 224 OF_DEV_AUXDATA("arm,pl011", 0x80120000, "uart0", NULL), 225 OF_DEV_AUXDATA("arm,pl011", 0x80121000, "uart1", NULL), 226 OF_DEV_AUXDATA("arm,pl011", 0x80007000, "uart2", NULL), 227 OF_DEV_AUXDATA("arm,pl022", 0x80002000, "ssp0", &ssp0_plat), 228 OF_DEV_AUXDATA("arm,pl18x", 0x80126000, "sdi0", &mop500_sdi0_data), 229 OF_DEV_AUXDATA("arm,pl18x", 0x80118000, "sdi1", &mop500_sdi1_data), 230 OF_DEV_AUXDATA("arm,pl18x", 0x80005000, "sdi2", &mop500_sdi2_data), 231 OF_DEV_AUXDATA("arm,pl18x", 0x80114000, "sdi4", &mop500_sdi4_data), 232 /* Requires clock name bindings. */ 233 OF_DEV_AUXDATA("st,nomadik-gpio", 0x8012e000, "gpio.0", NULL), 234 OF_DEV_AUXDATA("st,nomadik-gpio", 0x8012e080, "gpio.1", NULL), 235 OF_DEV_AUXDATA("st,nomadik-gpio", 0x8000e000, "gpio.2", NULL), 236 OF_DEV_AUXDATA("st,nomadik-gpio", 0x8000e080, "gpio.3", NULL), 237 OF_DEV_AUXDATA("st,nomadik-gpio", 0x8000e100, "gpio.4", NULL), 238 OF_DEV_AUXDATA("st,nomadik-gpio", 0x8000e180, "gpio.5", NULL), 239 OF_DEV_AUXDATA("st,nomadik-gpio", 0x8011e000, "gpio.6", NULL), 240 OF_DEV_AUXDATA("st,nomadik-gpio", 0x8011e080, "gpio.7", NULL), 241 OF_DEV_AUXDATA("st,nomadik-gpio", 0xa03fe000, "gpio.8", NULL), 242 OF_DEV_AUXDATA("st,nomadik-i2c", 0x80004000, "nmk-i2c.0", NULL), 243 OF_DEV_AUXDATA("st,nomadik-i2c", 0x80122000, "nmk-i2c.1", NULL), 244 OF_DEV_AUXDATA("st,nomadik-i2c", 0x80128000, "nmk-i2c.2", NULL), 245 OF_DEV_AUXDATA("st,nomadik-i2c", 0x80110000, "nmk-i2c.3", NULL), 246 OF_DEV_AUXDATA("st,nomadik-i2c", 0x8012a000, "nmk-i2c.4", NULL), 247 OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu", 248 &db8500_prcmu_pdata), 249 OF_DEV_AUXDATA("smsc,lan9115", 0x50000000, "smsc911x", NULL), 250 /* Requires device name bindings. */ 251 OF_DEV_AUXDATA("stericsson,nmk-pinctrl", U8500_PRCMU_BASE, 252 "pinctrl-db8500", NULL), 253 /* Requires clock name and DMA bindings. */ 254 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80123000, 255 "ux500-msp-i2s.0", &msp0_platform_data), 256 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80124000, 257 "ux500-msp-i2s.1", &msp1_platform_data), 258 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80117000, 259 "ux500-msp-i2s.2", &msp2_platform_data), 260 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80125000, 261 "ux500-msp-i2s.3", &msp3_platform_data), 262 /* Requires clock name bindings and channel address lookup table. */ 263 OF_DEV_AUXDATA("stericsson,db8500-dma40", 0x801C0000, "dma40.0", NULL), 264 {}, 265}; 266 267static const struct of_device_id u8500_local_bus_nodes[] = { 268 /* only create devices below soc node */ 269 { .compatible = "stericsson,db8500", }, 270 { .compatible = "stericsson,db8500-prcmu", }, 271 { .compatible = "simple-bus"}, 272 { }, 273}; 274 275static void __init u8500_init_machine(void) 276{ 277 struct device *parent = db8500_soc_device_init(); 278 279 /* Pinmaps must be in place before devices register */ 280 if (of_machine_is_compatible("st-ericsson,mop500")) 281 mop500_pinmaps_init(); 282 else if (of_machine_is_compatible("calaosystems,snowball-a9500")) { 283 snowball_pinmaps_init(); 284 mop500_snowball_ethernet_clock_enable(); 285 } else if (of_machine_is_compatible("st-ericsson,hrefv60+")) 286 hrefv60_pinmaps_init(); 287 else if (of_machine_is_compatible("st-ericsson,ccu9540")) {} 288 /* TODO: Add pinmaps for ccu9540 board. */ 289 290 /* automatically probe child nodes of db8500 device */ 291 of_platform_populate(NULL, u8500_local_bus_nodes, u8500_auxdata_lookup, parent); 292} 293 294static const char * stericsson_dt_platform_compat[] = { 295 "st-ericsson,u8500", 296 "st-ericsson,u8540", 297 "st-ericsson,u9500", 298 "st-ericsson,u9540", 299 NULL, 300}; 301 302DT_MACHINE_START(U8500_DT, "ST-Ericsson Ux5x0 platform (Device Tree Support)") 303 .smp = smp_ops(ux500_smp_ops), 304 .map_io = u8500_map_io, 305 .init_irq = ux500_init_irq, 306 /* we re-use nomadik timer here */ 307 .init_time = ux500_timer_init, 308 .init_machine = u8500_init_machine, 309 .init_late = NULL, 310 .dt_compat = stericsson_dt_platform_compat, 311MACHINE_END 312 313#endif 314