cpu-db8500.c revision c3b9d1db23c4ebd4d8a0964ebcf5f27d4eb8fa3f
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/platform_data/usb-musb-ux500.h> 21#include <linux/platform_data/pinctrl-nomadik.h> 22 23#include <asm/pmu.h> 24#include <asm/mach/map.h> 25#include <mach/hardware.h> 26#include <mach/setup.h> 27#include <mach/devices.h> 28#include <mach/db8500-regs.h> 29#include <mach/irqs.h> 30 31#include "devices-db8500.h" 32#include "ste-dma40-db8500.h" 33 34/* minimum static i/o mapping required to boot U8500 platforms */ 35static struct map_desc u8500_uart_io_desc[] __initdata = { 36 __IO_DEV_DESC(U8500_UART0_BASE, SZ_4K), 37 __IO_DEV_DESC(U8500_UART2_BASE, SZ_4K), 38}; 39/* U8500 and U9540 common io_desc */ 40static struct map_desc u8500_common_io_desc[] __initdata = { 41 /* SCU base also covers GIC CPU BASE and TWD with its 4K page */ 42 __IO_DEV_DESC(U8500_SCU_BASE, SZ_4K), 43 __IO_DEV_DESC(U8500_GIC_DIST_BASE, SZ_4K), 44 __IO_DEV_DESC(U8500_L2CC_BASE, SZ_4K), 45 __IO_DEV_DESC(U8500_MTU0_BASE, SZ_4K), 46 __IO_DEV_DESC(U8500_BACKUPRAM0_BASE, SZ_8K), 47 48 __IO_DEV_DESC(U8500_CLKRST1_BASE, SZ_4K), 49 __IO_DEV_DESC(U8500_CLKRST2_BASE, SZ_4K), 50 __IO_DEV_DESC(U8500_CLKRST3_BASE, SZ_4K), 51 __IO_DEV_DESC(U8500_CLKRST5_BASE, SZ_4K), 52 __IO_DEV_DESC(U8500_CLKRST6_BASE, SZ_4K), 53 54 __IO_DEV_DESC(U8500_GPIO0_BASE, SZ_4K), 55 __IO_DEV_DESC(U8500_GPIO1_BASE, SZ_4K), 56 __IO_DEV_DESC(U8500_GPIO2_BASE, SZ_4K), 57 __IO_DEV_DESC(U8500_GPIO3_BASE, SZ_4K), 58}; 59 60/* U8500 IO map specific description */ 61static struct map_desc u8500_io_desc[] __initdata = { 62 __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K), 63 __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K), 64 65}; 66 67/* U9540 IO map specific description */ 68static struct map_desc u9540_io_desc[] __initdata = { 69 __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K + SZ_8K), 70 __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K + SZ_8K), 71}; 72 73void __init u8500_map_io(void) 74{ 75 /* 76 * Map the UARTs early so that the DEBUG_LL stuff continues to work. 77 */ 78 iotable_init(u8500_uart_io_desc, ARRAY_SIZE(u8500_uart_io_desc)); 79 80 ux500_map_io(); 81 82 iotable_init(u8500_common_io_desc, ARRAY_SIZE(u8500_common_io_desc)); 83 84 if (cpu_is_ux540_family()) 85 iotable_init(u9540_io_desc, ARRAY_SIZE(u9540_io_desc)); 86 else 87 iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc)); 88 89 _PRCMU_BASE = __io_address(U8500_PRCMU_BASE); 90} 91 92static struct resource db8500_pmu_resources[] = { 93 [0] = { 94 .start = IRQ_DB8500_PMU, 95 .end = IRQ_DB8500_PMU, 96 .flags = IORESOURCE_IRQ, 97 }, 98}; 99 100/* 101 * The PMU IRQ lines of two cores are wired together into a single interrupt. 102 * Bounce the interrupt to the other core if it's not ours. 103 */ 104static irqreturn_t db8500_pmu_handler(int irq, void *dev, irq_handler_t handler) 105{ 106 irqreturn_t ret = handler(irq, dev); 107 int other = !smp_processor_id(); 108 109 if (ret == IRQ_NONE && cpu_online(other)) 110 irq_set_affinity(irq, cpumask_of(other)); 111 112 /* 113 * We should be able to get away with the amount of IRQ_NONEs we give, 114 * while still having the spurious IRQ detection code kick in if the 115 * interrupt really starts hitting spuriously. 116 */ 117 return ret; 118} 119 120struct arm_pmu_platdata db8500_pmu_platdata = { 121 .handle_irq = db8500_pmu_handler, 122}; 123 124static struct platform_device db8500_pmu_device = { 125 .name = "arm-pmu", 126 .id = -1, 127 .num_resources = ARRAY_SIZE(db8500_pmu_resources), 128 .resource = db8500_pmu_resources, 129 .dev.platform_data = &db8500_pmu_platdata, 130}; 131 132static struct platform_device db8500_prcmu_device = { 133 .name = "db8500-prcmu", 134}; 135 136static struct platform_device *platform_devs[] __initdata = { 137 &u8500_dma40_device, 138 &db8500_pmu_device, 139 &db8500_prcmu_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"); 163} 164 165static int usb_db8500_rx_dma_cfg[] = { 166 DB8500_DMA_DEV38_USB_OTG_IEP_1_9, 167 DB8500_DMA_DEV37_USB_OTG_IEP_2_10, 168 DB8500_DMA_DEV36_USB_OTG_IEP_3_11, 169 DB8500_DMA_DEV19_USB_OTG_IEP_4_12, 170 DB8500_DMA_DEV18_USB_OTG_IEP_5_13, 171 DB8500_DMA_DEV17_USB_OTG_IEP_6_14, 172 DB8500_DMA_DEV16_USB_OTG_IEP_7_15, 173 DB8500_DMA_DEV39_USB_OTG_IEP_8 174}; 175 176static int usb_db8500_tx_dma_cfg[] = { 177 DB8500_DMA_DEV38_USB_OTG_OEP_1_9, 178 DB8500_DMA_DEV37_USB_OTG_OEP_2_10, 179 DB8500_DMA_DEV36_USB_OTG_OEP_3_11, 180 DB8500_DMA_DEV19_USB_OTG_OEP_4_12, 181 DB8500_DMA_DEV18_USB_OTG_OEP_5_13, 182 DB8500_DMA_DEV17_USB_OTG_OEP_6_14, 183 DB8500_DMA_DEV16_USB_OTG_OEP_7_15, 184 DB8500_DMA_DEV39_USB_OTG_OEP_8 185}; 186 187static const char *db8500_read_soc_id(void) 188{ 189 void __iomem *uid = __io_address(U8500_BB_UID_BASE); 190 191 return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x", 192 readl((u32 *)uid+1), 193 readl((u32 *)uid+1), readl((u32 *)uid+2), 194 readl((u32 *)uid+3), readl((u32 *)uid+4)); 195} 196 197static struct device * __init db8500_soc_device_init(void) 198{ 199 const char *soc_id = db8500_read_soc_id(); 200 201 return ux500_soc_device_init(soc_id); 202} 203 204/* 205 * This function is called from the board init 206 */ 207struct device * __init u8500_init_devices(struct ab8500_platform_data *ab8500) 208{ 209 struct device *parent; 210 int i; 211 212 parent = db8500_soc_device_init(); 213 214 db8500_add_rtc(parent); 215 db8500_add_gpios(parent); 216 db8500_add_usb(parent, usb_db8500_rx_dma_cfg, usb_db8500_tx_dma_cfg); 217 218 platform_device_register_data(parent, 219 "cpufreq-u8500", -1, NULL, 0); 220 221 for (i = 0; i < ARRAY_SIZE(platform_devs); i++) 222 platform_devs[i]->dev.parent = parent; 223 224 db8500_prcmu_device.dev.platform_data = ab8500; 225 226 platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs)); 227 228 return parent; 229} 230 231/* TODO: Once all pieces are DT:ed, remove completely. */ 232struct device * __init u8500_of_init_devices(void) 233{ 234 struct device *parent; 235 236 parent = db8500_soc_device_init(); 237 238 db8500_add_usb(parent, usb_db8500_rx_dma_cfg, usb_db8500_tx_dma_cfg); 239 240 platform_device_register_data(parent, 241 "cpufreq-u8500", -1, NULL, 0); 242 243 u8500_dma40_device.dev.parent = parent; 244 245 /* 246 * Devices to be DT:ed: 247 * u8500_dma40_device = todo 248 * db8500_pmu_device = done 249 * db8500_prcmu_device = done 250 */ 251 platform_device_register(&u8500_dma40_device); 252 253 return parent; 254} 255