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storcenter.c

/*
 * Board setup routines for the storcenter
 *
 * Copyright 2007 (C) Oyvind Repvik (nail@nslu2-linux.org)
 * Copyright 2007 Andy Wilcox, Jon Loeliger
 *
 * Based on linkstation.c by G. Liakhovetski
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2.  This program is licensed "as is" without any warranty of
 * any kind, whether express or implied.
 */

#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/initrd.h>
#include <linux/mtd/physmap.h>
#include <linux/of_platform.h>

#include <asm/system.h>
#include <asm/time.h>
#include <asm/prom.h>
#include <asm/mpic.h>
#include <asm/pci-bridge.h>

#include "mpc10x.h"


#ifdef CONFIG_MTD_PHYSMAP
static struct mtd_partition storcenter_physmap_partitions[] = {
      {
            .name   = "kernel",
            .offset = 0x000000,
            .size   = 0x170000,
      },
      {
            .name   = "rootfs",
            .offset = 0x170000,
            .size   = 0x590000,
      },
      {
            .name   = "uboot",
            .offset = 0x700000,
            .size   = 0x040000,
      },
      {
            .name   = "config",
            .offset = 0x740000,
            .size   = 0x0c0000,
      },
};
#endif


static __initdata struct of_device_id storcenter_of_bus[] = {
      { .name = "soc", },
      {},
};

static int __init storcenter_device_probe(void)
{
      of_platform_bus_probe(NULL, storcenter_of_bus, NULL);
      return 0;
}
machine_device_initcall(storcenter, storcenter_device_probe);


static int __init storcenter_add_bridge(struct device_node *dev)
{
#ifdef CONFIG_PCI
      int len;
      struct pci_controller *hose;
      const int *bus_range;

      printk("Adding PCI host bridge %s\n", dev->full_name);

      hose = pcibios_alloc_controller(dev);
      if (hose == NULL)
            return -ENOMEM;

      bus_range = of_get_property(dev, "bus-range", &len);
      hose->first_busno = bus_range ? bus_range[0] : 0;
      hose->last_busno = bus_range ? bus_range[1] : 0xff;

      setup_indirect_pci(hose, MPC10X_MAPB_CNFG_ADDR, MPC10X_MAPB_CNFG_DATA, 0);

      /* Interpret the "ranges" property */
      /* This also maps the I/O region and sets isa_io/mem_base */
      pci_process_bridge_OF_ranges(hose, dev, 1);
#endif

      return 0;
}

static void __init storcenter_setup_arch(void)
{
      struct device_node *np;

#ifdef CONFIG_MTD_PHYSMAP
      physmap_set_partitions(storcenter_physmap_partitions,
                         ARRAY_SIZE(storcenter_physmap_partitions));
#endif

      /* Lookup PCI host bridges */
      for_each_compatible_node(np, "pci", "mpc10x-pci")
            storcenter_add_bridge(np);

      printk(KERN_INFO "IOMEGA StorCenter\n");
}

/*
 * Interrupt setup and service.  Interrrupts on the turbostation come
 * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
 */
static void __init storcenter_init_IRQ(void)
{
      struct mpic *mpic;
      struct device_node *dnp;
      const void *prop;
      int size;
      phys_addr_t paddr;

      dnp = of_find_node_by_type(NULL, "open-pic");
      if (dnp == NULL)
            return;

      prop = of_get_property(dnp, "reg", &size);
      if (prop == NULL) {
            of_node_put(dnp);
            return;
      }

      paddr = (phys_addr_t)of_translate_address(dnp, prop);
      mpic = mpic_alloc(dnp, paddr, MPIC_PRIMARY | MPIC_WANTS_RESET,
                  16, 32, " OpenPIC  ");

      of_node_put(dnp);

      BUG_ON(mpic == NULL);

      /*
       * 16 Serial Interrupts followed by 16 Internal Interrupts.
       * I2C is the second internal, so it is at 17, 0x11020.
       */
      mpic_assign_isu(mpic, 0, paddr + 0x10200);
      mpic_assign_isu(mpic, 1, paddr + 0x11000);

      mpic_init(mpic);
}

static void storcenter_restart(char *cmd)
{
      local_irq_disable();

      /* Set exception prefix high - to the firmware */
      _nmask_and_or_msr(0, MSR_IP);

      /* Wait for reset to happen */
      for (;;) ;
}

static int __init storcenter_probe(void)
{
      unsigned long root = of_get_flat_dt_root();

      return of_flat_dt_is_compatible(root, "iomega,storcenter");
}

define_machine(storcenter){
      .name                   = "IOMEGA StorCenter",
      .probe                  = storcenter_probe,
      .setup_arch             = storcenter_setup_arch,
      .init_IRQ         = storcenter_init_IRQ,
      .get_irq          = mpic_get_irq,
      .restart          = storcenter_restart,
      .calibrate_decr   = generic_calibrate_decr,
};

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