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enp2611.c

/*
 * arch/arm/mach-ixp2000/enp2611.c
 *
 * Radisys ENP-2611 support.
 *
 * Created 2004 by Lennert Buytenhek from the ixdp2x01 code.  The
 * original version carries the following notices:
 *
 * Original Author: Andrzej Mialkowski <andrzej.mialkowski@intel.com>
 * Maintainer: Deepak Saxena <dsaxena@plexity.net>
 *
 * Copyright (C) 2002-2003 Intel Corp.
 * Copyright (C) 2003-2004 MontaVista Software, Inc.
 *
 *  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/bitops.h>
#include <linux/pci.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/serial_core.h>
#include <linux/platform_device.h>

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/system.h>
#include <asm/hardware.h>
#include <asm/mach-types.h>

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

/*************************************************************************
 * ENP-2611 timer tick configuration
 *************************************************************************/
static void __init enp2611_timer_init(void)
{
      ixp2000_init_time(50 * 1000 * 1000);
}

static struct sys_timer enp2611_timer = {
      .init       = enp2611_timer_init,
      .offset           = ixp2000_gettimeoffset,
};


/*************************************************************************
 * ENP-2611 I/O
 *************************************************************************/
static struct map_desc enp2611_io_desc[] __initdata = {
      {
            .virtual    = ENP2611_CALEB_VIRT_BASE,
            .pfn        = __phys_to_pfn(ENP2611_CALEB_PHYS_BASE),
            .length           = ENP2611_CALEB_SIZE,
            .type       = MT_DEVICE_IXP2000,
      }, {
            .virtual    = ENP2611_PM3386_0_VIRT_BASE,
            .pfn        = __phys_to_pfn(ENP2611_PM3386_0_PHYS_BASE),
            .length           = ENP2611_PM3386_0_SIZE,
            .type       = MT_DEVICE_IXP2000,
      }, {
            .virtual    = ENP2611_PM3386_1_VIRT_BASE,
            .pfn        = __phys_to_pfn(ENP2611_PM3386_1_PHYS_BASE),
            .length           = ENP2611_PM3386_1_SIZE,
            .type       = MT_DEVICE_IXP2000,
      }
};

void __init enp2611_map_io(void)
{
      ixp2000_map_io();
      iotable_init(enp2611_io_desc, ARRAY_SIZE(enp2611_io_desc));
}


/*************************************************************************
 * ENP-2611 PCI
 *************************************************************************/
static int enp2611_pci_setup(int nr, struct pci_sys_data *sys)
{
      sys->mem_offset = 0xe0000000;
      ixp2000_pci_setup(nr, sys);
      return 1;
}

static void __init enp2611_pci_preinit(void)
{
      ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00100000);
      ixp2000_pci_preinit();
      pcibios_setup("firmware");
}

static inline int enp2611_pci_valid_device(struct pci_bus *bus,
                                    unsigned int devfn)
{
      /* The 82559 ethernet controller appears at both PCI:1:0:0 and
       * PCI:1:2:0, so let's pretend the second one isn't there.
       */
      if (bus->number == 0x01 && devfn == 0x10)
            return 0;

      return 1;
}

static int enp2611_pci_read_config(struct pci_bus *bus, unsigned int devfn,
                              int where, int size, u32 *value)
{
      if (enp2611_pci_valid_device(bus, devfn))
            return ixp2000_pci_read_config(bus, devfn, where, size, value);

      return PCIBIOS_DEVICE_NOT_FOUND;
}

static int enp2611_pci_write_config(struct pci_bus *bus, unsigned int devfn,
                              int where, int size, u32 value)
{
      if (enp2611_pci_valid_device(bus, devfn))
            return ixp2000_pci_write_config(bus, devfn, where, size, value);

      return PCIBIOS_DEVICE_NOT_FOUND;
}

static struct pci_ops enp2611_pci_ops = {
      .read   = enp2611_pci_read_config,
      .write  = enp2611_pci_write_config
};

static struct pci_bus * __init enp2611_pci_scan_bus(int nr,
                                    struct pci_sys_data *sys)
{
      return pci_scan_bus(sys->busnr, &enp2611_pci_ops, sys);
}

static int __init enp2611_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
      int irq;

      if (dev->bus->number == 0 && PCI_SLOT(dev->devfn) == 0) {
            /* IXP2400. */
            irq = IRQ_IXP2000_PCIA;
      } else if (dev->bus->number == 0 && PCI_SLOT(dev->devfn) == 1) {
            /* 21555 non-transparent bridge.  */
            irq = IRQ_IXP2000_PCIB;
      } else if (dev->bus->number == 0 && PCI_SLOT(dev->devfn) == 4) {
            /* PCI2050B transparent bridge.  */
            irq = -1;
      } else if (dev->bus->number == 1 && PCI_SLOT(dev->devfn) == 0) {
            /* 82559 ethernet.  */
            irq = IRQ_IXP2000_PCIA;
      } else if (dev->bus->number == 1 && PCI_SLOT(dev->devfn) == 1) {
            /* SPI-3 option board.  */
            irq = IRQ_IXP2000_PCIB;
      } else {
            printk(KERN_ERR "enp2611_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;
}

struct hw_pci enp2611_pci __initdata = {
      .nr_controllers   = 1,
      .setup            = enp2611_pci_setup,
      .preinit    = enp2611_pci_preinit,
      .scan       = enp2611_pci_scan_bus,
      .map_irq    = enp2611_pci_map_irq,
};

int __init enp2611_pci_init(void)
{
      if (machine_is_enp2611())
            pci_common_init(&enp2611_pci);

      return 0;
}

subsys_initcall(enp2611_pci_init);


/*************************************************************************
 * ENP-2611 Machine Initialization
 *************************************************************************/
static struct flash_platform_data enp2611_flash_platform_data = {
      .map_name   = "cfi_probe",
      .width            = 1,
};

static struct ixp2000_flash_data enp2611_flash_data = {
      .platform_data    = &enp2611_flash_platform_data,
      .nr_banks   = 1
};

static struct resource enp2611_flash_resource = {
      .start            = 0xc4000000,
      .end        = 0xc4000000 + 0x00ffffff,
      .flags            = IORESOURCE_MEM,
};

static struct platform_device enp2611_flash = {
      .name       = "IXP2000-Flash",
      .id         = 0,
      .dev        = {
            .platform_data = &enp2611_flash_data,
      },
      .num_resources    = 1,
      .resource   = &enp2611_flash_resource,
};

static struct ixp2000_i2c_pins enp2611_i2c_gpio_pins = {
      .sda_pin    = ENP2611_GPIO_SDA,
      .scl_pin    = ENP2611_GPIO_SCL,
};

static struct platform_device enp2611_i2c_controller = {
      .name       = "IXP2000-I2C",
      .id         = 0,
      .dev        = {
            .platform_data = &enp2611_i2c_gpio_pins
      },
      .num_resources    = 0
};

static struct platform_device *enp2611_devices[] __initdata = {
      &enp2611_flash,
      &enp2611_i2c_controller
};

static void __init enp2611_init_machine(void)
{
      platform_add_devices(enp2611_devices, ARRAY_SIZE(enp2611_devices));
      ixp2000_uart_init();
}


MACHINE_START(ENP2611, "Radisys ENP-2611 PCI network processor board")
      /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
      .phys_io    = IXP2000_UART_PHYS_BASE,
      .io_pg_offst      = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc,
      .boot_params      = 0x00000100,
      .map_io           = enp2611_map_io,
      .init_irq   = ixp2000_init_irq,
      .timer            = &enp2611_timer,
      .init_machine     = enp2611_init_machine,
MACHINE_END



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