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 #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 #include <asm/hardware/gic.h>
  31
  32 #include <mach/hardware.h>
  33 #include <mach/setup.h>
  34 #include <mach/devices.h>
  35 #include <mach/db8500-regs.h>
  36 #include <mach/irqs.h>
  37
  38 #include "devices-db8500.h"
  39 #include "ste-dma40-db8500.h"
  40 #include "board-mop500.h"
  41
  42 /* minimum static i/o mapping required to boot U8500 platforms */
  43 static struct map_desc u8500_uart_io_desc[] __initdata = {
  44         __IO_DEV_DESC(U8500_UART0_BASE, SZ_4K),
  45         __IO_DEV_DESC(U8500_UART2_BASE, SZ_4K),
  46 };
  47 /*  U8500 and U9540 common io_desc */
  48 static struct map_desc u8500_common_io_desc[] __initdata = {
  49         /* SCU base also covers GIC CPU BASE and TWD with its 4K page */
  50         __IO_DEV_DESC(U8500_SCU_BASE, SZ_4K),
  51         __IO_DEV_DESC(U8500_GIC_DIST_BASE, SZ_4K),
  52         __IO_DEV_DESC(U8500_L2CC_BASE, SZ_4K),
  53         __IO_DEV_DESC(U8500_MTU0_BASE, SZ_4K),
  54         __IO_DEV_DESC(U8500_BACKUPRAM0_BASE, SZ_8K),
  55
  56         __IO_DEV_DESC(U8500_CLKRST1_BASE, SZ_4K),
  57         __IO_DEV_DESC(U8500_CLKRST2_BASE, SZ_4K),
  58         __IO_DEV_DESC(U8500_CLKRST3_BASE, SZ_4K),
  59         __IO_DEV_DESC(U8500_CLKRST5_BASE, SZ_4K),
  60         __IO_DEV_DESC(U8500_CLKRST6_BASE, SZ_4K),
  61
  62         __IO_DEV_DESC(U8500_GPIO0_BASE, SZ_4K),
  63         __IO_DEV_DESC(U8500_GPIO1_BASE, SZ_4K),
  64         __IO_DEV_DESC(U8500_GPIO2_BASE, SZ_4K),
  65         __IO_DEV_DESC(U8500_GPIO3_BASE, SZ_4K),
  66 };
  67
  68 /* U8500 IO map specific description */
  69 static struct map_desc u8500_io_desc[] __initdata = {
  70         __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K),
  71         __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K),
  72
  73 };
  74
  75 /* U9540 IO map specific description */
  76 static struct map_desc u9540_io_desc[] __initdata = {
  77         __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K + SZ_8K),
  78         __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K + SZ_8K),
  79 };
  80
  81 void __init u8500_map_io(void)
  82 {
  83         /*
  84          * Map the UARTs early so that the DEBUG_LL stuff continues to work.
  85          */
  86         iotable_init(u8500_uart_io_desc, ARRAY_SIZE(u8500_uart_io_desc));
  87
  88         ux500_map_io();
  89
  90         iotable_init(u8500_common_io_desc, ARRAY_SIZE(u8500_common_io_desc));
  91
  92         if (cpu_is_ux540_family())
  93                 iotable_init(u9540_io_desc, ARRAY_SIZE(u9540_io_desc));
  94         else
  95                 iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc));
  96
  97         _PRCMU_BASE = __io_address(U8500_PRCMU_BASE);
  98 }
  99
 100 static struct resource db8500_pmu_resources[] = {
 101         [0] = {
 102                 .start          = IRQ_DB8500_PMU,
 103                 .end            = IRQ_DB8500_PMU,
 104                 .flags          = IORESOURCE_IRQ,
 105         },
 106 };
 107
 108 /*
 109  * The PMU IRQ lines of two cores are wired together into a single interrupt.
 110  * Bounce the interrupt to the other core if it's not ours.
 111  */
 112 static irqreturn_t db8500_pmu_handler(int irq, void *dev, irq_handler_t handler)
 113 {
 114         irqreturn_t ret = handler(irq, dev);
 115         int other = !smp_processor_id();
 116
 117         if (ret == IRQ_NONE && cpu_online(other))
 118                 irq_set_affinity(irq, cpumask_of(other));
 119
 120         /*
 121          * We should be able to get away with the amount of IRQ_NONEs we give,
 122          * while still having the spurious IRQ detection code kick in if the
 123          * interrupt really starts hitting spuriously.
 124          */
 125         return ret;
 126 }
 127
 128 struct arm_pmu_platdata db8500_pmu_platdata = {
 129         .handle_irq             = db8500_pmu_handler,
 130 };
 131
 132 static struct platform_device db8500_pmu_device = {
 133         .name                   = "arm-pmu",
 134         .id                     = -1,
 135         .num_resources          = ARRAY_SIZE(db8500_pmu_resources),
 136         .resource               = db8500_pmu_resources,
 137         .dev.platform_data      = &db8500_pmu_platdata,
 138 };
 139
 140 static struct platform_device db8500_prcmu_device = {
 141         .name                   = "db8500-prcmu",
 142 };
 143
 144 static struct platform_device *platform_devs[] __initdata = {
 145         &u8500_dma40_device,
 146         &db8500_pmu_device,
 147         &db8500_prcmu_device,
 148 };
 149
 150 static resource_size_t __initdata db8500_gpio_base[] = {
 151         U8500_GPIOBANK0_BASE,
 152         U8500_GPIOBANK1_BASE,
 153         U8500_GPIOBANK2_BASE,
 154         U8500_GPIOBANK3_BASE,
 155         U8500_GPIOBANK4_BASE,
 156         U8500_GPIOBANK5_BASE,
 157         U8500_GPIOBANK6_BASE,
 158         U8500_GPIOBANK7_BASE,
 159         U8500_GPIOBANK8_BASE,
 160 };
 161
 162 static void __init db8500_add_gpios(struct device *parent)
 163 {
 164         struct nmk_gpio_platform_data pdata = {
 165                 .supports_sleepmode = true,
 166         };
 167
 168         dbx500_add_gpios(parent, ARRAY_AND_SIZE(db8500_gpio_base),
 169                          IRQ_DB8500_GPIO0, &pdata);
 170         dbx500_add_pinctrl(parent, "pinctrl-db8500", U8500_PRCMU_BASE);
 171 }
 172
 173 static int usb_db8500_rx_dma_cfg[] = {
 174         DB8500_DMA_DEV38_USB_OTG_IEP_1_9,
 175         DB8500_DMA_DEV37_USB_OTG_IEP_2_10,
 176         DB8500_DMA_DEV36_USB_OTG_IEP_3_11,
 177         DB8500_DMA_DEV19_USB_OTG_IEP_4_12,
 178         DB8500_DMA_DEV18_USB_OTG_IEP_5_13,
 179         DB8500_DMA_DEV17_USB_OTG_IEP_6_14,
 180         DB8500_DMA_DEV16_USB_OTG_IEP_7_15,
 181         DB8500_DMA_DEV39_USB_OTG_IEP_8
 182 };
 183
 184 static int usb_db8500_tx_dma_cfg[] = {
 185         DB8500_DMA_DEV38_USB_OTG_OEP_1_9,
 186         DB8500_DMA_DEV37_USB_OTG_OEP_2_10,
 187         DB8500_DMA_DEV36_USB_OTG_OEP_3_11,
 188         DB8500_DMA_DEV19_USB_OTG_OEP_4_12,
 189         DB8500_DMA_DEV18_USB_OTG_OEP_5_13,
 190         DB8500_DMA_DEV17_USB_OTG_OEP_6_14,
 191         DB8500_DMA_DEV16_USB_OTG_OEP_7_15,
 192         DB8500_DMA_DEV39_USB_OTG_OEP_8
 193 };
 194
 195 static const char *db8500_read_soc_id(void)
 196 {
 197         void __iomem *uid = __io_address(U8500_BB_UID_BASE);
 198
 199         /* Throw these device-specific numbers into the entropy pool */
 200         add_device_randomness(uid, 0x14);
 201         return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x",
 202                          readl((u32 *)uid+1),
 203                          readl((u32 *)uid+1), readl((u32 *)uid+2),
 204                          readl((u32 *)uid+3), readl((u32 *)uid+4));
 205 }
 206
 207 static struct device * __init db8500_soc_device_init(void)
 208 {
 209         const char *soc_id = db8500_read_soc_id();
 210
 211         return ux500_soc_device_init(soc_id);
 212 }
 213
 214 /*
 215  * This function is called from the board init
 216  */
 217 struct device * __init u8500_init_devices(struct ab8500_platform_data *ab8500)
 218 {
 219         struct device *parent;
 220         int i;
 221
 222         parent = db8500_soc_device_init();
 223
 224         db8500_add_rtc(parent);
 225         db8500_add_gpios(parent);
 226         db8500_add_usb(parent, usb_db8500_rx_dma_cfg, usb_db8500_tx_dma_cfg);
 227
 228         for (i = 0; i < ARRAY_SIZE(platform_devs); i++)
 229                 platform_devs[i]->dev.parent = parent;
 230
 231         db8500_prcmu_device.dev.platform_data = ab8500;
 232
 233         platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
 234
 235         return parent;
 236 }
 237
 238 #ifdef CONFIG_MACH_UX500_DT
 239
 240 /* TODO: Once all pieces are DT:ed, remove completely. */
 241 static struct device * __init u8500_of_init_devices(void)
 242 {
 243         struct device *parent = db8500_soc_device_init();
 244
 245         db8500_add_usb(parent, usb_db8500_rx_dma_cfg, usb_db8500_tx_dma_cfg);
 246
 247         u8500_dma40_device.dev.parent = parent;
 248
 249         /*
 250          * Devices to be DT:ed:
 251          *   u8500_dma40_device  = todo
 252          *   db8500_pmu_device   = done
 253          *   db8500_prcmu_device = done
 254          */
 255         platform_device_register(&u8500_dma40_device);
 256
 257         return parent;
 258 }
 259
 260 static struct of_dev_auxdata u8500_auxdata_lookup[] __initdata = {
 261         /* Requires call-back bindings. */
 262         OF_DEV_AUXDATA("arm,cortex-a9-pmu", 0, "arm-pmu", &db8500_pmu_platdata),
 263         /* Requires DMA bindings. */
 264         OF_DEV_AUXDATA("arm,pl011", 0x80120000, "uart0", &uart0_plat),
 265         OF_DEV_AUXDATA("arm,pl011", 0x80121000, "uart1", &uart1_plat),
 266         OF_DEV_AUXDATA("arm,pl011", 0x80007000, "uart2", &uart2_plat),
 267         OF_DEV_AUXDATA("arm,pl022", 0x80002000, "ssp0",  &ssp0_plat),
 268         OF_DEV_AUXDATA("arm,pl18x", 0x80126000, "sdi0",  &mop500_sdi0_data),
 269         OF_DEV_AUXDATA("arm,pl18x", 0x80118000, "sdi1",  &mop500_sdi1_data),
 270         OF_DEV_AUXDATA("arm,pl18x", 0x80005000, "sdi2",  &mop500_sdi2_data),
 271         OF_DEV_AUXDATA("arm,pl18x", 0x80114000, "sdi4",  &mop500_sdi4_data),
 272         /* Requires clock name bindings. */
 273         OF_DEV_AUXDATA("st,nomadik-gpio", 0x8012e000, "gpio.0", NULL),
 274         OF_DEV_AUXDATA("st,nomadik-gpio", 0x8012e080, "gpio.1", NULL),
 275         OF_DEV_AUXDATA("st,nomadik-gpio", 0x8000e000, "gpio.2", NULL),
 276         OF_DEV_AUXDATA("st,nomadik-gpio", 0x8000e080, "gpio.3", NULL),
 277         OF_DEV_AUXDATA("st,nomadik-gpio", 0x8000e100, "gpio.4", NULL),
 278         OF_DEV_AUXDATA("st,nomadik-gpio", 0x8000e180, "gpio.5", NULL),
 279         OF_DEV_AUXDATA("st,nomadik-gpio", 0x8011e000, "gpio.6", NULL),
 280         OF_DEV_AUXDATA("st,nomadik-gpio", 0x8011e080, "gpio.7", NULL),
 281         OF_DEV_AUXDATA("st,nomadik-gpio", 0xa03fe000, "gpio.8", NULL),
 282         OF_DEV_AUXDATA("st,nomadik-i2c", 0x80004000, "nmk-i2c.0", NULL),
 283         OF_DEV_AUXDATA("st,nomadik-i2c", 0x80122000, "nmk-i2c.1", NULL),
 284         OF_DEV_AUXDATA("st,nomadik-i2c", 0x80128000, "nmk-i2c.2", NULL),
 285         OF_DEV_AUXDATA("st,nomadik-i2c", 0x80110000, "nmk-i2c.3", NULL),
 286         OF_DEV_AUXDATA("st,nomadik-i2c", 0x8012a000, "nmk-i2c.4", NULL),
 287         /* Requires device name bindings. */
 288         OF_DEV_AUXDATA("stericsson,nmk_pinctrl", U8500_PRCMU_BASE,
 289                 "pinctrl-db8500", NULL),
 290         /* Requires clock name and DMA bindings. */
 291         OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80123000,
 292                 "ux500-msp-i2s.0", &msp0_platform_data),
 293         OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80124000,
 294                 "ux500-msp-i2s.1", &msp1_platform_data),
 295         OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80117000,
 296                 "ux500-msp-i2s.2", &msp2_platform_data),
 297         OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80125000,
 298                 "ux500-msp-i2s.3", &msp3_platform_data),
 299         {},
 300 };
 301
 302 static const struct of_device_id u8500_local_bus_nodes[] = {
 303         /* only create devices below soc node */
 304         { .compatible = "stericsson,db8500", },
 305         { .compatible = "stericsson,db8500-prcmu", },
 306         { .compatible = "simple-bus"},
 307         { },
 308 };
 309
 310 static void __init u8500_init_machine(void)
 311 {
 312         struct device *parent = NULL;
 313
 314         /* Pinmaps must be in place before devices register */
 315         if (of_machine_is_compatible("st-ericsson,mop500"))
 316                 mop500_pinmaps_init();
 317         else if (of_machine_is_compatible("calaosystems,snowball-a9500"))
 318                 snowball_pinmaps_init();
 319         else if (of_machine_is_compatible("st-ericsson,hrefv60+"))
 320                 hrefv60_pinmaps_init();
 321         else if (of_machine_is_compatible("st-ericsson,ccu9540")) {}
 322                 /* TODO: Add pinmaps for ccu9540 board. */
 323
 324         /* TODO: Export SoC, USB, cpu-freq and DMA40 */
 325         parent = u8500_of_init_devices();
 326
 327         /* automatically probe child nodes of db8500 device */
 328         of_platform_populate(NULL, u8500_local_bus_nodes, u8500_auxdata_lookup, parent);
 329 }
 330
 331 static const char * stericsson_dt_platform_compat[] = {
 332         "st-ericsson,u8500",
 333         "st-ericsson,u8540",
 334         "st-ericsson,u9500",
 335         "st-ericsson,u9540",
 336         NULL,
 337 };
 338
 339 DT_MACHINE_START(U8500_DT, "ST-Ericsson Ux5x0 platform (Device Tree Support)")
 340         .smp            = smp_ops(ux500_smp_ops),
 341         .map_io         = u8500_map_io,
 342         .init_irq       = ux500_init_irq,
 343         /* we re-use nomadik timer here */
 344         .timer          = &ux500_timer,
 345         .handle_irq     = gic_handle_irq,
 346         .init_machine   = u8500_init_machine,
 347         .init_late      = NULL,
 348         .dt_compat      = stericsson_dt_platform_compat,
 349 MACHINE_END
 350
 351 #endif