arch/arm/mach-ux500/cpu-db8500.c

   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
  20 #include <asm/mach/map.h>
  21 #include <asm/pmu.h>
  22 #include <plat/gpio-nomadik.h>
  23 #include <mach/hardware.h>
  24 #include <mach/setup.h>
  25 #include <mach/devices.h>
  26 #include <mach/usb.h>
  27
  28 #include "devices-db8500.h"
  29 #include "ste-dma40-db8500.h"
  30
  31 /* minimum static i/o mapping required to boot U8500 platforms */
  32 static struct map_desc u8500_uart_io_desc[] __initdata = {
  33         __IO_DEV_DESC(U8500_UART0_BASE, SZ_4K),
  34         __IO_DEV_DESC(U8500_UART2_BASE, SZ_4K),
  35 };
  36
  37 static struct map_desc u8500_io_desc[] __initdata = {
  38         /* SCU base also covers GIC CPU BASE and TWD with its 4K page */
  39         __IO_DEV_DESC(U8500_SCU_BASE, SZ_4K),
  40         __IO_DEV_DESC(U8500_GIC_DIST_BASE, SZ_4K),
  41         __IO_DEV_DESC(U8500_L2CC_BASE, SZ_4K),
  42         __IO_DEV_DESC(U8500_MTU0_BASE, SZ_4K),
  43         __IO_DEV_DESC(U8500_BACKUPRAM0_BASE, SZ_8K),
  44
  45         __IO_DEV_DESC(U8500_CLKRST1_BASE, SZ_4K),
  46         __IO_DEV_DESC(U8500_CLKRST2_BASE, SZ_4K),
  47         __IO_DEV_DESC(U8500_CLKRST3_BASE, SZ_4K),
  48         __IO_DEV_DESC(U8500_CLKRST5_BASE, SZ_4K),
  49         __IO_DEV_DESC(U8500_CLKRST6_BASE, SZ_4K),
  50
  51         __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K),
  52         __IO_DEV_DESC(U8500_GPIO0_BASE, SZ_4K),
  53         __IO_DEV_DESC(U8500_GPIO1_BASE, SZ_4K),
  54         __IO_DEV_DESC(U8500_GPIO2_BASE, SZ_4K),
  55         __IO_DEV_DESC(U8500_GPIO3_BASE, SZ_4K),
  56         __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K),
  57 };
  58
  59 void __init u8500_map_io(void)
  60 {
  61         /*
  62          * Map the UARTs early so that the DEBUG_LL stuff continues to work.
  63          */
  64         iotable_init(u8500_uart_io_desc, ARRAY_SIZE(u8500_uart_io_desc));
  65
  66         ux500_map_io();
  67
  68         iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc));
  69
  70         _PRCMU_BASE = __io_address(U8500_PRCMU_BASE);
  71 }
  72
  73 static struct resource db8500_pmu_resources[] = {
  74         [0] = {
  75                 .start          = IRQ_DB8500_PMU,
  76                 .end            = IRQ_DB8500_PMU,
  77                 .flags          = IORESOURCE_IRQ,
  78         },
  79 };
  80
  81 /*
  82  * The PMU IRQ lines of two cores are wired together into a single interrupt.
  83  * Bounce the interrupt to the other core if it's not ours.
  84  */
  85 static irqreturn_t db8500_pmu_handler(int irq, void *dev, irq_handler_t handler)
  86 {
  87         irqreturn_t ret = handler(irq, dev);
  88         int other = !smp_processor_id();
  89
  90         if (ret == IRQ_NONE && cpu_online(other))
  91                 irq_set_affinity(irq, cpumask_of(other));
  92
  93         /*
  94          * We should be able to get away with the amount of IRQ_NONEs we give,
  95          * while still having the spurious IRQ detection code kick in if the
  96          * interrupt really starts hitting spuriously.
  97          */
  98         return ret;
  99 }
 100
 101 static struct arm_pmu_platdata db8500_pmu_platdata = {
 102         .handle_irq             = db8500_pmu_handler,
 103 };
 104
 105 static struct platform_device db8500_pmu_device = {
 106         .name                   = "arm-pmu",
 107         .id                     = ARM_PMU_DEVICE_CPU,
 108         .num_resources          = ARRAY_SIZE(db8500_pmu_resources),
 109         .resource               = db8500_pmu_resources,
 110         .dev.platform_data      = &db8500_pmu_platdata,
 111 };
 112
 113 static struct platform_device db8500_prcmu_device = {
 114         .name                   = "db8500-prcmu",
 115 };
 116
 117 static struct platform_device *platform_devs[] __initdata = {
 118         &u8500_dma40_device,
 119         &db8500_pmu_device,
 120         &db8500_prcmu_device,
 121 };
 122
 123 static resource_size_t __initdata db8500_gpio_base[] = {
 124         U8500_GPIOBANK0_BASE,
 125         U8500_GPIOBANK1_BASE,
 126         U8500_GPIOBANK2_BASE,
 127         U8500_GPIOBANK3_BASE,
 128         U8500_GPIOBANK4_BASE,
 129         U8500_GPIOBANK5_BASE,
 130         U8500_GPIOBANK6_BASE,
 131         U8500_GPIOBANK7_BASE,
 132         U8500_GPIOBANK8_BASE,
 133 };
 134
 135 static void __init db8500_add_gpios(void)
 136 {
 137         struct nmk_gpio_platform_data pdata = {
 138                 .supports_sleepmode = true,
 139         };
 140
 141         dbx500_add_gpios(ARRAY_AND_SIZE(db8500_gpio_base),
 142                          IRQ_DB8500_GPIO0, &pdata);
 143 }
 144
 145 static int usb_db8500_rx_dma_cfg[] = {
 146         DB8500_DMA_DEV38_USB_OTG_IEP_1_9,
 147         DB8500_DMA_DEV37_USB_OTG_IEP_2_10,
 148         DB8500_DMA_DEV36_USB_OTG_IEP_3_11,
 149         DB8500_DMA_DEV19_USB_OTG_IEP_4_12,
 150         DB8500_DMA_DEV18_USB_OTG_IEP_5_13,
 151         DB8500_DMA_DEV17_USB_OTG_IEP_6_14,
 152         DB8500_DMA_DEV16_USB_OTG_IEP_7_15,
 153         DB8500_DMA_DEV39_USB_OTG_IEP_8
 154 };
 155
 156 static int usb_db8500_tx_dma_cfg[] = {
 157         DB8500_DMA_DEV38_USB_OTG_OEP_1_9,
 158         DB8500_DMA_DEV37_USB_OTG_OEP_2_10,
 159         DB8500_DMA_DEV36_USB_OTG_OEP_3_11,
 160         DB8500_DMA_DEV19_USB_OTG_OEP_4_12,
 161         DB8500_DMA_DEV18_USB_OTG_OEP_5_13,
 162         DB8500_DMA_DEV17_USB_OTG_OEP_6_14,
 163         DB8500_DMA_DEV16_USB_OTG_OEP_7_15,
 164         DB8500_DMA_DEV39_USB_OTG_OEP_8
 165 };
 166
 167 /*
 168  * This function is called from the board init
 169  */
 170 void __init u8500_init_devices(void)
 171 {
 172         db8500_add_rtc();
 173         db8500_add_gpios();
 174         db8500_add_usb(usb_db8500_rx_dma_cfg, usb_db8500_tx_dma_cfg);
 175
 176         platform_device_register_simple("cpufreq-u8500", -1, NULL, 0);
 177         platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
 178
 179         return ;
 180 }