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nanoengine.c

/*
 * linux/arch/arm/mach-sa1100/nanoengine.c
 *
 * Bright Star Engineering's nanoEngine board init code.
 *
 * Copyright (C) 2010 Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br>
 *
 * 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.
 *
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/root_dev.h>

#include <asm/mach-types.h>
#include <asm/setup.h>

#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/map.h>
#include <asm/mach/serial_sa1100.h>

#include <mach/hardware.h>
#include <mach/nanoengine.h>

#include "generic.h"

/* Flash bank 0 */
static struct mtd_partition nanoengine_partitions[] = {
      {
            .name = "nanoEngine boot firmware and parameter table",
            .size       = 0x00010000,  /* 32K */
            .offset           = 0,
            .mask_flags = MTD_WRITEABLE,
      }, {
            .name       = "kernel/initrd reserved",
            .size       = 0x002f0000,
            .offset           = 0x00010000,
            .mask_flags = MTD_WRITEABLE,
      }, {
            .name       = "experimental filesystem allocation",
            .size       = 0x00100000,
            .offset           = 0x00300000,
            .mask_flags = MTD_WRITEABLE,
      }
};

static struct flash_platform_data nanoengine_flash_data = {
      .map_name   = "jedec_probe",
      .parts            = nanoengine_partitions,
      .nr_parts   = ARRAY_SIZE(nanoengine_partitions),
};

static struct resource nanoengine_flash_resources[] = {
      {
            .start      = SA1100_CS0_PHYS,
            .end  = SA1100_CS0_PHYS + SZ_32M - 1,
            .flags      = IORESOURCE_MEM,
      }, {
            .start      = SA1100_CS1_PHYS,
            .end  = SA1100_CS1_PHYS + SZ_32M - 1,
            .flags      = IORESOURCE_MEM,
      }
};

static struct map_desc nanoengine_io_desc[] __initdata = {
      {
            /* System Registers */
            .virtual    = 0xf0000000,
            .pfn        = __phys_to_pfn(0x10000000),
            .length           = 0x00100000,
            .type       = MT_DEVICE
      }, {
            /* Internal PCI Memory Read/Write */
            .virtual    = NANO_PCI_MEM_RW_VIRT,
            .pfn        = __phys_to_pfn(NANO_PCI_MEM_RW_PHYS),
            .length           = NANO_PCI_MEM_RW_SIZE,
            .type       = MT_DEVICE
      }, {
            /* Internal PCI Config Space */
            .virtual    = NANO_PCI_CONFIG_SPACE_VIRT,
            .pfn        = __phys_to_pfn(NANO_PCI_CONFIG_SPACE_PHYS),
            .length           = NANO_PCI_CONFIG_SPACE_SIZE,
            .type       = MT_DEVICE
      }
};

static void __init nanoengine_map_io(void)
{
      sa1100_map_io();
      iotable_init(nanoengine_io_desc, ARRAY_SIZE(nanoengine_io_desc));

      sa1100_register_uart(0, 1);
      sa1100_register_uart(1, 2);
      sa1100_register_uart(2, 3);
      Ser1SDCR0 |= SDCR0_UART;
      /* disable IRDA -- UART2 is used as a normal serial port */
      Ser2UTCR4 = 0;
      Ser2HSCR0 = 0;
}

static void __init nanoengine_init(void)
{
      sa11x0_register_mtd(&nanoengine_flash_data, nanoengine_flash_resources,
            ARRAY_SIZE(nanoengine_flash_resources));
}

MACHINE_START(NANOENGINE, "BSE nanoEngine")
      .boot_params      = 0xc0000000,
      .map_io           = nanoengine_map_io,
      .init_irq   = sa1100_init_irq,
      .timer            = &sa1100_timer,
      .init_machine     = nanoengine_init,
MACHINE_END

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