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realview_pbx.c

/*
 *  arch/arm/mach-realview/realview_pbx.c
 *
 *  Copyright (C) 2009 ARM Limited
 *  Copyright (C) 2000 Deep Blue Solutions Ltd
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/sysdev.h>
#include <linux/amba/bus.h>
#include <linux/amba/pl061.h>
#include <linux/amba/mmci.h>
#include <linux/amba/pl022.h>
#include <linux/io.h>

#include <asm/irq.h>
#include <asm/leds.h>
#include <asm/mach-types.h>
#include <asm/pmu.h>
#include <asm/smp_twd.h>
#include <asm/pgtable.h>
#include <asm/hardware/gic.h>
#include <asm/hardware/cache-l2x0.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>

#include <mach/hardware.h>
#include <mach/board-pbx.h>
#include <mach/irqs.h>

#include "core.h"

static struct map_desc realview_pbx_io_desc[] __initdata = {
      {
            .virtual    = IO_ADDRESS(REALVIEW_SYS_BASE),
            .pfn        = __phys_to_pfn(REALVIEW_SYS_BASE),
            .length           = SZ_4K,
            .type       = MT_DEVICE,
      }, {
            .virtual    = IO_ADDRESS(REALVIEW_PBX_GIC_CPU_BASE),
            .pfn        = __phys_to_pfn(REALVIEW_PBX_GIC_CPU_BASE),
            .length           = SZ_4K,
            .type       = MT_DEVICE,
      }, {
            .virtual    = IO_ADDRESS(REALVIEW_PBX_GIC_DIST_BASE),
            .pfn        = __phys_to_pfn(REALVIEW_PBX_GIC_DIST_BASE),
            .length           = SZ_4K,
            .type       = MT_DEVICE,
      }, {
            .virtual    = IO_ADDRESS(REALVIEW_SCTL_BASE),
            .pfn        = __phys_to_pfn(REALVIEW_SCTL_BASE),
            .length           = SZ_4K,
            .type       = MT_DEVICE,
      }, {
            .virtual    = IO_ADDRESS(REALVIEW_PBX_TIMER0_1_BASE),
            .pfn        = __phys_to_pfn(REALVIEW_PBX_TIMER0_1_BASE),
            .length           = SZ_4K,
            .type       = MT_DEVICE,
      }, {
            .virtual    = IO_ADDRESS(REALVIEW_PBX_TIMER2_3_BASE),
            .pfn        = __phys_to_pfn(REALVIEW_PBX_TIMER2_3_BASE),
            .length           = SZ_4K,
            .type       = MT_DEVICE,
      },
#ifdef CONFIG_PCI
      {
            .virtual    = PCIX_UNIT_BASE,
            .pfn        = __phys_to_pfn(REALVIEW_PBX_PCI_BASE),
            .length           = REALVIEW_PBX_PCI_BASE_SIZE,
            .type       = MT_DEVICE,
      },
#endif
#ifdef CONFIG_DEBUG_LL
      {
            .virtual    = IO_ADDRESS(REALVIEW_PBX_UART0_BASE),
            .pfn        = __phys_to_pfn(REALVIEW_PBX_UART0_BASE),
            .length           = SZ_4K,
            .type       = MT_DEVICE,
      },
#endif
};

static struct map_desc realview_local_io_desc[] __initdata = {
      {
            .virtual        = IO_ADDRESS(REALVIEW_PBX_TILE_GIC_CPU_BASE),
            .pfn            = __phys_to_pfn(REALVIEW_PBX_TILE_GIC_CPU_BASE),
            .length         = SZ_4K,
            .type           = MT_DEVICE,
      }, {
            .virtual        = IO_ADDRESS(REALVIEW_PBX_TILE_GIC_DIST_BASE),
            .pfn            = __phys_to_pfn(REALVIEW_PBX_TILE_GIC_DIST_BASE),
            .length         = SZ_4K,
            .type           = MT_DEVICE,
      }, {
            .virtual        = IO_ADDRESS(REALVIEW_PBX_TILE_L220_BASE),
            .pfn            = __phys_to_pfn(REALVIEW_PBX_TILE_L220_BASE),
            .length         = SZ_8K,
            .type           = MT_DEVICE,
      }
};

static void __init realview_pbx_map_io(void)
{
      iotable_init(realview_pbx_io_desc, ARRAY_SIZE(realview_pbx_io_desc));
      if (core_tile_pbx11mp() || core_tile_pbxa9mp())
            iotable_init(realview_local_io_desc, ARRAY_SIZE(realview_local_io_desc));
}

static struct pl061_platform_data gpio0_plat_data = {
      .gpio_base  = 0,
      .irq_base   = -1,
};

static struct pl061_platform_data gpio1_plat_data = {
      .gpio_base  = 8,
      .irq_base   = -1,
};

static struct pl061_platform_data gpio2_plat_data = {
      .gpio_base  = 16,
      .irq_base   = -1,
};

static struct pl022_ssp_controller ssp0_plat_data = {
      .bus_id = 0,
      .enable_dma = 0,
      .num_chipselect = 1,
};

/*
 * RealView PBXCore AMBA devices
 */

#define GPIO2_IRQ       { IRQ_PBX_GPIO2, NO_IRQ }
#define GPIO2_DMA       { 0, 0 }
#define GPIO3_IRQ       { IRQ_PBX_GPIO3, NO_IRQ }
#define GPIO3_DMA       { 0, 0 }
#define AACI_IRQ        { IRQ_PBX_AACI, NO_IRQ }
#define AACI_DMA        { 0x80, 0x81 }
#define MMCI0_IRQ       { IRQ_PBX_MMCI0A, IRQ_PBX_MMCI0B }
#define MMCI0_DMA       { 0x84, 0 }
#define KMI0_IRQ        { IRQ_PBX_KMI0, NO_IRQ }
#define KMI0_DMA        { 0, 0 }
#define KMI1_IRQ        { IRQ_PBX_KMI1, NO_IRQ }
#define KMI1_DMA        { 0, 0 }
#define PBX_SMC_IRQ           { NO_IRQ, NO_IRQ }
#define PBX_SMC_DMA           { 0, 0 }
#define MPMC_IRQ        { NO_IRQ, NO_IRQ }
#define MPMC_DMA        { 0, 0 }
#define PBX_CLCD_IRQ          { IRQ_PBX_CLCD, NO_IRQ }
#define PBX_CLCD_DMA          { 0, 0 }
#define DMAC_IRQ        { IRQ_PBX_DMAC, NO_IRQ }
#define DMAC_DMA        { 0, 0 }
#define SCTL_IRQ        { NO_IRQ, NO_IRQ }
#define SCTL_DMA        { 0, 0 }
#define PBX_WATCHDOG_IRQ      { IRQ_PBX_WATCHDOG, NO_IRQ }
#define PBX_WATCHDOG_DMA      { 0, 0 }
#define PBX_GPIO0_IRQ         { IRQ_PBX_GPIO0, NO_IRQ }
#define PBX_GPIO0_DMA         { 0, 0 }
#define GPIO1_IRQ       { IRQ_PBX_GPIO1, NO_IRQ }
#define GPIO1_DMA       { 0, 0 }
#define PBX_RTC_IRQ           { IRQ_PBX_RTC, NO_IRQ }
#define PBX_RTC_DMA           { 0, 0 }
#define SCI_IRQ               { IRQ_PBX_SCI, NO_IRQ }
#define SCI_DMA               { 7, 6 }
#define PBX_UART0_IRQ         { IRQ_PBX_UART0, NO_IRQ }
#define PBX_UART0_DMA         { 15, 14 }
#define PBX_UART1_IRQ         { IRQ_PBX_UART1, NO_IRQ }
#define PBX_UART1_DMA         { 13, 12 }
#define PBX_UART2_IRQ         { IRQ_PBX_UART2, NO_IRQ }
#define PBX_UART2_DMA         { 11, 10 }
#define PBX_UART3_IRQ         { IRQ_PBX_UART3, NO_IRQ }
#define PBX_UART3_DMA         { 0x86, 0x87 }
#define PBX_SSP_IRQ           { IRQ_PBX_SSP, NO_IRQ }
#define PBX_SSP_DMA           { 9, 8 }

/* FPGA Primecells */
AMBA_DEVICE(aaci, "fpga:aaci",      AACI,       NULL);
AMBA_DEVICE(mmc0, "fpga:mmc0",      MMCI0,            &realview_mmc0_plat_data);
AMBA_DEVICE(kmi0, "fpga:kmi0",      KMI0,       NULL);
AMBA_DEVICE(kmi1, "fpga:kmi1",      KMI1,       NULL);
AMBA_DEVICE(uart3,      "fpga:uart3",     PBX_UART3,  NULL);

/* DevChip Primecells */
AMBA_DEVICE(smc,  "dev:smc",  PBX_SMC,    NULL);
AMBA_DEVICE(sctl, "dev:sctl", SCTL,       NULL);
AMBA_DEVICE(wdog, "dev:wdog", PBX_WATCHDOG,     NULL);
AMBA_DEVICE(gpio0,      "dev:gpio0",      PBX_GPIO0,  &gpio0_plat_data);
AMBA_DEVICE(gpio1,      "dev:gpio1",      GPIO1,            &gpio1_plat_data);
AMBA_DEVICE(gpio2,      "dev:gpio2",      GPIO2,            &gpio2_plat_data);
AMBA_DEVICE(rtc,  "dev:rtc",  PBX_RTC,    NULL);
AMBA_DEVICE(sci0, "dev:sci0", SCI,        NULL);
AMBA_DEVICE(uart0,      "dev:uart0",      PBX_UART0,  NULL);
AMBA_DEVICE(uart1,      "dev:uart1",      PBX_UART1,  NULL);
AMBA_DEVICE(uart2,      "dev:uart2",      PBX_UART2,  NULL);
AMBA_DEVICE(ssp0, "dev:ssp0", PBX_SSP,    &ssp0_plat_data);

/* Primecells on the NEC ISSP chip */
AMBA_DEVICE(clcd, "issp:clcd",      PBX_CLCD,   &clcd_plat_data);
AMBA_DEVICE(dmac, "issp:dmac",      DMAC,       NULL);

static struct amba_device *amba_devs[] __initdata = {
      &dmac_device,
      &uart0_device,
      &uart1_device,
      &uart2_device,
      &uart3_device,
      &smc_device,
      &clcd_device,
      &sctl_device,
      &wdog_device,
      &gpio0_device,
      &gpio1_device,
      &gpio2_device,
      &rtc_device,
      &sci0_device,
      &ssp0_device,
      &aaci_device,
      &mmc0_device,
      &kmi0_device,
      &kmi1_device,
};

/*
 * RealView PB-X platform devices
 */
static struct resource realview_pbx_flash_resources[] = {
      [0] = {
            .start          = REALVIEW_PBX_FLASH0_BASE,
            .end            = REALVIEW_PBX_FLASH0_BASE + REALVIEW_PBX_FLASH0_SIZE - 1,
            .flags          = IORESOURCE_MEM,
      },
      [1] = {
            .start          = REALVIEW_PBX_FLASH1_BASE,
            .end            = REALVIEW_PBX_FLASH1_BASE + REALVIEW_PBX_FLASH1_SIZE - 1,
            .flags          = IORESOURCE_MEM,
      },
};

static struct resource realview_pbx_smsc911x_resources[] = {
      [0] = {
            .start            = REALVIEW_PBX_ETH_BASE,
            .end        = REALVIEW_PBX_ETH_BASE + SZ_64K - 1,
            .flags            = IORESOURCE_MEM,
      },
      [1] = {
            .start            = IRQ_PBX_ETH,
            .end        = IRQ_PBX_ETH,
            .flags            = IORESOURCE_IRQ,
      },
};

static struct resource realview_pbx_isp1761_resources[] = {
      [0] = {
            .start            = REALVIEW_PBX_USB_BASE,
            .end        = REALVIEW_PBX_USB_BASE + SZ_128K - 1,
            .flags            = IORESOURCE_MEM,
      },
      [1] = {
            .start            = IRQ_PBX_USB,
            .end        = IRQ_PBX_USB,
            .flags            = IORESOURCE_IRQ,
      },
};

static struct resource pmu_resources[] = {
      [0] = {
            .start            = IRQ_PBX_PMU_CPU0,
            .end        = IRQ_PBX_PMU_CPU0,
            .flags            = IORESOURCE_IRQ,
      },
      [1] = {
            .start            = IRQ_PBX_PMU_CPU1,
            .end        = IRQ_PBX_PMU_CPU1,
            .flags            = IORESOURCE_IRQ,
      },
      [2] = {
            .start            = IRQ_PBX_PMU_CPU2,
            .end        = IRQ_PBX_PMU_CPU2,
            .flags            = IORESOURCE_IRQ,
      },
      [3] = {
            .start            = IRQ_PBX_PMU_CPU3,
            .end        = IRQ_PBX_PMU_CPU3,
            .flags            = IORESOURCE_IRQ,
      },
};

static struct platform_device pmu_device = {
      .name             = "arm-pmu",
      .id               = ARM_PMU_DEVICE_CPU,
      .num_resources          = ARRAY_SIZE(pmu_resources),
      .resource         = pmu_resources,
};

static void __init gic_init_irq(void)
{
      /* ARM PBX on-board GIC */
      if (core_tile_pbx11mp() || core_tile_pbxa9mp()) {
            gic_init(0, 29, __io_address(REALVIEW_PBX_TILE_GIC_DIST_BASE),
                   __io_address(REALVIEW_PBX_TILE_GIC_CPU_BASE));
      } else {
            gic_init(0, IRQ_PBX_GIC_START,
                   __io_address(REALVIEW_PBX_GIC_DIST_BASE),
                   __io_address(REALVIEW_PBX_GIC_CPU_BASE));
      }
}

static void __init realview_pbx_timer_init(void)
{
      timer0_va_base = __io_address(REALVIEW_PBX_TIMER0_1_BASE);
      timer1_va_base = __io_address(REALVIEW_PBX_TIMER0_1_BASE) + 0x20;
      timer2_va_base = __io_address(REALVIEW_PBX_TIMER2_3_BASE);
      timer3_va_base = __io_address(REALVIEW_PBX_TIMER2_3_BASE) + 0x20;

#ifdef CONFIG_LOCAL_TIMERS
      if (core_tile_pbx11mp() || core_tile_pbxa9mp())
            twd_base = __io_address(REALVIEW_PBX_TILE_TWD_BASE);
#endif
      realview_timer_init(IRQ_PBX_TIMER0_1);
}

static struct sys_timer realview_pbx_timer = {
      .init       = realview_pbx_timer_init,
};

static void realview_pbx_fixup(struct machine_desc *mdesc, struct tag *tags,
                         char **from, struct meminfo *meminfo)
{
#ifdef CONFIG_SPARSEMEM
      /*
       * Memory configuration with SPARSEMEM enabled on RealView PBX (see
       * asm/mach/memory.h for more information).
       */
      meminfo->bank[0].start = 0;
      meminfo->bank[0].size = SZ_256M;
      meminfo->bank[1].start = 0x20000000;
      meminfo->bank[1].size = SZ_512M;
      meminfo->bank[2].start = 0x80000000;
      meminfo->bank[2].size = SZ_256M;
      meminfo->nr_banks = 3;
#else
      realview_fixup(mdesc, tags, from, meminfo);
#endif
}

static void realview_pbx_reset(char mode)
{
      void __iomem *reset_ctrl = __io_address(REALVIEW_SYS_RESETCTL);
      void __iomem *lock_ctrl = __io_address(REALVIEW_SYS_LOCK);

      /*
       * To reset, we hit the on-board reset register
       * in the system FPGA
       */
      __raw_writel(REALVIEW_SYS_LOCK_VAL, lock_ctrl);
      __raw_writel(0x00F0, reset_ctrl);
      __raw_writel(0x00F4, reset_ctrl);
}

static void __init realview_pbx_init(void)
{
      int i;

#ifdef CONFIG_CACHE_L2X0
      if (core_tile_pbxa9mp()) {
            void __iomem *l2x0_base =
                  __io_address(REALVIEW_PBX_TILE_L220_BASE);

            /* set RAM latencies to 1 cycle for eASIC */
            writel(0, l2x0_base + L2X0_TAG_LATENCY_CTRL);
            writel(0, l2x0_base + L2X0_DATA_LATENCY_CTRL);

            /* 16KB way size, 8-way associativity, parity disabled
             * Bits:  .. 0 0 0 0 1 00 1 0 1 001 0 000 0 .... .... .... */
            l2x0_init(l2x0_base, 0x02520000, 0xc0000fff);
            platform_device_register(&pmu_device);
      }
#endif

      realview_flash_register(realview_pbx_flash_resources,
                        ARRAY_SIZE(realview_pbx_flash_resources));
      realview_eth_register(NULL, realview_pbx_smsc911x_resources);
      platform_device_register(&realview_i2c_device);
      platform_device_register(&realview_cf_device);
      realview_usb_register(realview_pbx_isp1761_resources);

      for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
            struct amba_device *d = amba_devs[i];
            amba_device_register(d, &iomem_resource);
      }

#ifdef CONFIG_LEDS
      leds_event = realview_leds_event;
#endif
      realview_reset = realview_pbx_reset;
}

MACHINE_START(REALVIEW_PBX, "ARM-RealView PBX")
      /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
      .boot_params      = PHYS_OFFSET + 0x00000100,
      .fixup            = realview_pbx_fixup,
      .map_io           = realview_pbx_map_io,
      .init_irq   = gic_init_irq,
      .timer            = &realview_pbx_timer,
      .init_machine     = realview_pbx_init,
MACHINE_END

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