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iq31244.c

/*
 * arch/arm/mach-iop32x/iq31244.c
 *
 * Board support code for the Intel EP80219 and IQ31244 platforms.
 *
 * Author: Rory Bolt <rorybolt@pacbell.net>
 * Copyright (C) 2002 Rory Bolt
 * Copyright 2003 (c) MontaVista, Software, Inc.
 * Copyright (C) 2004 Intel Corp.
 *
 * 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/mm.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/pm.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <linux/mtd/physmap.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <asm/cputype.h>
#include <asm/irq.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/pci.h>
#include <asm/mach/time.h>
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <mach/time.h>

/*
 * Until March of 2007 iq31244 platforms and ep80219 platforms shared the
 * same machine id, and the processor type was used to select board type.
 * However this assumption breaks for an iq80219 board which is an iop219
 * processor on an iq31244 board.  The force_ep80219 flag has been added
 * for old boot loaders using the iq31244 machine id for an ep80219 platform.
 */
static int force_ep80219;

static int is_80219(void)
{
      return !!((read_cpuid_id() & 0xffffffe0) == 0x69052e20);
}

static int is_ep80219(void)
{
      if (machine_is_ep80219() || force_ep80219)
            return 1;
      else
            return 0;
}


/*
 * EP80219/IQ31244 timer tick configuration.
 */
static void __init iq31244_timer_init(void)
{
      if (is_ep80219()) {
            /* 33.333 MHz crystal.  */
            iop_init_time(200000000);
      } else {
            /* 33.000 MHz crystal.  */
            iop_init_time(198000000);
      }
}

static struct sys_timer iq31244_timer = {
      .init       = iq31244_timer_init,
      .offset           = iop_gettimeoffset,
};


/*
 * IQ31244 I/O.
 */
static struct map_desc iq31244_io_desc[] __initdata = {
      {     /* on-board devices */
            .virtual    = IQ31244_UART,
            .pfn        = __phys_to_pfn(IQ31244_UART),
            .length           = 0x00100000,
            .type       = MT_DEVICE,
      },
};

void __init iq31244_map_io(void)
{
      iop3xx_map_io();
      iotable_init(iq31244_io_desc, ARRAY_SIZE(iq31244_io_desc));
}


/*
 * EP80219/IQ31244 PCI.
 */
static int __init
ep80219_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
      int irq;

      if (slot == 0) {
            /* CFlash */
            irq = IRQ_IOP32X_XINT1;
      } else if (slot == 1) {
            /* 82551 Pro 100 */
            irq = IRQ_IOP32X_XINT0;
      } else if (slot == 2) {
            /* PCI-X Slot */
            irq = IRQ_IOP32X_XINT3;
      } else if (slot == 3) {
            /* SATA */
            irq = IRQ_IOP32X_XINT2;
      } else {
            printk(KERN_ERR "ep80219_pci_map_irq() called for unknown "
                  "device PCI:%d:%d:%d\n", dev->bus->number,
                  PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
            irq = -1;
      }

      return irq;
}

static struct hw_pci ep80219_pci __initdata = {
      .swizzle    = pci_std_swizzle,
      .nr_controllers = 1,
      .setup            = iop3xx_pci_setup,
      .preinit    = iop3xx_pci_preinit,
      .scan       = iop3xx_pci_scan_bus,
      .map_irq    = ep80219_pci_map_irq,
};

static int __init
iq31244_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
      int irq;

      if (slot == 0) {
            /* CFlash */
            irq = IRQ_IOP32X_XINT1;
      } else if (slot == 1) {
            /* SATA */
            irq = IRQ_IOP32X_XINT2;
      } else if (slot == 2) {
            /* PCI-X Slot */
            irq = IRQ_IOP32X_XINT3;
      } else if (slot == 3) {
            /* 82546 GigE */
            irq = IRQ_IOP32X_XINT0;
      } else {
            printk(KERN_ERR "iq31244_pci_map_irq called for unknown "
                  "device PCI:%d:%d:%d\n", dev->bus->number,
                  PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
            irq = -1;
      }

      return irq;
}

static struct hw_pci iq31244_pci __initdata = {
      .swizzle    = pci_std_swizzle,
      .nr_controllers = 1,
      .setup            = iop3xx_pci_setup,
      .preinit    = iop3xx_pci_preinit,
      .scan       = iop3xx_pci_scan_bus,
      .map_irq    = iq31244_pci_map_irq,
};

static int __init iq31244_pci_init(void)
{
      if (is_ep80219())
            pci_common_init(&ep80219_pci);
      else if (machine_is_iq31244()) {
            if (is_80219()) {
                  printk("note: iq31244 board type has been selected\n");
                  printk("note: to select ep80219 operation:\n");
                  printk("\t1/ specify \"force_ep80219\" on the kernel"
                        " command line\n");
                  printk("\t2/ update boot loader to pass"
                        " the ep80219 id: %d\n", MACH_TYPE_EP80219);
            }
            pci_common_init(&iq31244_pci);
      }

      return 0;
}

subsys_initcall(iq31244_pci_init);


/*
 * IQ31244 machine initialisation.
 */
static struct physmap_flash_data iq31244_flash_data = {
      .width            = 2,
};

static struct resource iq31244_flash_resource = {
      .start            = 0xf0000000,
      .end        = 0xf07fffff,
      .flags            = IORESOURCE_MEM,
};

static struct platform_device iq31244_flash_device = {
      .name       = "physmap-flash",
      .id         = 0,
      .dev        = {
            .platform_data    = &iq31244_flash_data,
      },
      .num_resources    = 1,
      .resource   = &iq31244_flash_resource,
};

static struct plat_serial8250_port iq31244_serial_port[] = {
      {
            .mapbase    = IQ31244_UART,
            .membase    = (char *)IQ31244_UART,
            .irq        = IRQ_IOP32X_XINT1,
            .flags            = UPF_SKIP_TEST,
            .iotype           = UPIO_MEM,
            .regshift   = 0,
            .uartclk    = 1843200,
      },
      { },
};

static struct resource iq31244_uart_resource = {
      .start            = IQ31244_UART,
      .end        = IQ31244_UART + 7,
      .flags            = IORESOURCE_MEM,
};

static struct platform_device iq31244_serial_device = {
      .name       = "serial8250",
      .id         = PLAT8250_DEV_PLATFORM,
      .dev        = {
            .platform_data          = iq31244_serial_port,
      },
      .num_resources    = 1,
      .resource   = &iq31244_uart_resource,
};

/*
 * This function will send a SHUTDOWN_COMPLETE message to the PIC
 * controller over I2C.  We are not using the i2c subsystem since
 * we are going to power off and it may be removed
 */
void ep80219_power_off(void)
{
      /*
       * Send the Address byte w/ the start condition
       */
      *IOP3XX_IDBR1 = 0x60;
      *IOP3XX_ICR1 = 0xE9;
      mdelay(1);

      /*
       * Send the START_MSG byte w/ no start or stop condition
       */
      *IOP3XX_IDBR1 = 0x0F;
      *IOP3XX_ICR1 = 0xE8;
      mdelay(1);

      /*
       * Send the SHUTDOWN_COMPLETE Message ID byte w/ no start or
       * stop condition
       */
      *IOP3XX_IDBR1 = 0x03;
      *IOP3XX_ICR1 = 0xE8;
      mdelay(1);

      /*
       * Send an ignored byte w/ stop condition
       */
      *IOP3XX_IDBR1 = 0x00;
      *IOP3XX_ICR1 = 0xEA;

      while (1)
            ;
}

static void __init iq31244_init_machine(void)
{
      platform_device_register(&iop3xx_i2c0_device);
      platform_device_register(&iop3xx_i2c1_device);
      platform_device_register(&iq31244_flash_device);
      platform_device_register(&iq31244_serial_device);
      platform_device_register(&iop3xx_dma_0_channel);
      platform_device_register(&iop3xx_dma_1_channel);

      if (is_ep80219())
            pm_power_off = ep80219_power_off;

      if (!is_80219())
            platform_device_register(&iop3xx_aau_channel);
}

static int __init force_ep80219_setup(char *str)
{
      force_ep80219 = 1;
      return 1;
}

__setup("force_ep80219", force_ep80219_setup);

MACHINE_START(IQ31244, "Intel IQ31244")
      /* Maintainer: Intel Corp. */
      .phys_io    = IQ31244_UART,
      .io_pg_offst      = ((IQ31244_UART) >> 18) & 0xfffc,
      .boot_params      = 0xa0000100,
      .map_io           = iq31244_map_io,
      .init_irq   = iop32x_init_irq,
      .timer            = &iq31244_timer,
      .init_machine     = iq31244_init_machine,
MACHINE_END

/* There should have been an ep80219 machine identifier from the beginning.
 * Boot roms older than March 2007 do not know the ep80219 machine id.  Pass
 * "force_ep80219" on the kernel command line, otherwise iq31244 operation
 * will be selected.
 */
MACHINE_START(EP80219, "Intel EP80219")
      /* Maintainer: Intel Corp. */
      .phys_io    = IQ31244_UART,
      .io_pg_offst      = ((IQ31244_UART) >> 18) & 0xfffc,
      .boot_params      = 0xa0000100,
      .map_io           = iq31244_map_io,
      .init_irq   = iop32x_init_irq,
      .timer            = &iq31244_timer,
      .init_machine     = iq31244_init_machine,
MACHINE_END

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