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ts72xx.c

/*
 * arch/arm/mach-ep93xx/ts72xx.c
 * Technologic Systems TS72xx SBC support.
 *
 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/mtd/physmap.h>
#include <linux/platform_device.h>
#include <linux/m48t86.h>
#include <asm/io.h>
#include <asm/hardware.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>

static struct map_desc ts72xx_io_desc[] __initdata = {
      {
            .virtual    = TS72XX_MODEL_VIRT_BASE,
            .pfn        = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
            .length           = TS72XX_MODEL_SIZE,
            .type       = MT_DEVICE,
      }, {
            .virtual    = TS72XX_OPTIONS_VIRT_BASE,
            .pfn        = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
            .length           = TS72XX_OPTIONS_SIZE,
            .type       = MT_DEVICE,
      }, {
            .virtual    = TS72XX_OPTIONS2_VIRT_BASE,
            .pfn        = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
            .length           = TS72XX_OPTIONS2_SIZE,
            .type       = MT_DEVICE,
      }, {
            .virtual    = TS72XX_RTC_INDEX_VIRT_BASE,
            .pfn        = __phys_to_pfn(TS72XX_RTC_INDEX_PHYS_BASE),
            .length           = TS72XX_RTC_INDEX_SIZE,
            .type       = MT_DEVICE,
      }, {
            .virtual    = TS72XX_RTC_DATA_VIRT_BASE,
            .pfn        = __phys_to_pfn(TS72XX_RTC_DATA_PHYS_BASE),
            .length           = TS72XX_RTC_DATA_SIZE,
            .type       = MT_DEVICE,
      }
};

static struct map_desc ts72xx_nand_io_desc[] __initdata = {
      {
            .virtual    = TS72XX_NAND_DATA_VIRT_BASE,
            .pfn        = __phys_to_pfn(TS72XX_NAND1_DATA_PHYS_BASE),
            .length           = TS72XX_NAND_DATA_SIZE,
            .type       = MT_DEVICE,
      }, {
            .virtual    = TS72XX_NAND_CONTROL_VIRT_BASE,
            .pfn        = __phys_to_pfn(TS72XX_NAND1_CONTROL_PHYS_BASE),
            .length           = TS72XX_NAND_CONTROL_SIZE,
            .type       = MT_DEVICE,
      }, {
            .virtual    = TS72XX_NAND_BUSY_VIRT_BASE,
            .pfn        = __phys_to_pfn(TS72XX_NAND1_BUSY_PHYS_BASE),
            .length           = TS72XX_NAND_BUSY_SIZE,
            .type       = MT_DEVICE,
      }
};

static struct map_desc ts72xx_alternate_nand_io_desc[] __initdata = {
      {
            .virtual    = TS72XX_NAND_DATA_VIRT_BASE,
            .pfn        = __phys_to_pfn(TS72XX_NAND2_DATA_PHYS_BASE),
            .length           = TS72XX_NAND_DATA_SIZE,
            .type       = MT_DEVICE,
      }, {
            .virtual    = TS72XX_NAND_CONTROL_VIRT_BASE,
            .pfn        = __phys_to_pfn(TS72XX_NAND2_CONTROL_PHYS_BASE),
            .length           = TS72XX_NAND_CONTROL_SIZE,
            .type       = MT_DEVICE,
      }, {
            .virtual    = TS72XX_NAND_BUSY_VIRT_BASE,
            .pfn        = __phys_to_pfn(TS72XX_NAND2_BUSY_PHYS_BASE),
            .length           = TS72XX_NAND_BUSY_SIZE,
            .type       = MT_DEVICE,
      }
};

static void __init ts72xx_map_io(void)
{
      ep93xx_map_io();
      iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));

      /*
       * The TS-7200 has NOR flash, the other models have NAND flash.
       */
      if (!board_is_ts7200()) {
            if (is_ts9420_installed()) {
                  iotable_init(ts72xx_alternate_nand_io_desc,
                        ARRAY_SIZE(ts72xx_alternate_nand_io_desc));
            } else {
                  iotable_init(ts72xx_nand_io_desc,
                        ARRAY_SIZE(ts72xx_nand_io_desc));
            }
      }
}

static struct physmap_flash_data ts72xx_flash_data = {
      .width            = 1,
};

static struct resource ts72xx_flash_resource = {
      .start            = TS72XX_NOR_PHYS_BASE,
      .end        = TS72XX_NOR_PHYS_BASE + 0x00ffffff,
      .flags            = IORESOURCE_MEM,
};

static struct platform_device ts72xx_flash = {
      .name       = "physmap-flash",
      .id         = 0,
      .dev        = {
            .platform_data    = &ts72xx_flash_data,
      },
      .num_resources    = 1,
      .resource   = &ts72xx_flash_resource,
};

static unsigned char ts72xx_rtc_readbyte(unsigned long addr)
{
      __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
      return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE);
}

static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr)
{
      __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
      __raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE);
}

static struct m48t86_ops ts72xx_rtc_ops = {
      .readbyte         = ts72xx_rtc_readbyte,
      .writebyte        = ts72xx_rtc_writebyte,
};

static struct platform_device ts72xx_rtc_device = {
      .name             = "rtc-m48t86",
      .id               = -1,
      .dev              = {
            .platform_data          = &ts72xx_rtc_ops,
      },
      .num_resources          = 0,
};

static void __init ts72xx_init_machine(void)
{
      ep93xx_init_devices();
      if (board_is_ts7200())
            platform_device_register(&ts72xx_flash);
      platform_device_register(&ts72xx_rtc_device);
}

MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
      /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
      .phys_io    = EP93XX_APB_PHYS_BASE,
      .io_pg_offst      = ((EP93XX_APB_VIRT_BASE) >> 18) & 0xfffc,
      .boot_params      = 0x00000100,
      .map_io           = ts72xx_map_io,
      .init_irq   = ep93xx_init_irq,
      .timer            = &ep93xx_timer,
      .init_machine     = ts72xx_init_machine,
MACHINE_END

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