LXR linux/arch/powerpc/platforms/embedded6xx/storcenter.c

   1/*
   2 * Board setup routines for the storcenter
   3 *
   4 * Copyright 2007 (C) Oyvind Repvik (nail@nslu2-linux.org)
   5 * Copyright 2007 Andy Wilcox, Jon Loeliger
   6 *
   7 * Based on linkstation.c by G. Liakhovetski
   8 *
   9 * This file is licensed under the terms of the GNU General Public License
  10 * version 2.  This program is licensed "as is" without any warranty of
  11 * any kind, whether express or implied.
  12 */
  13
  14#include <linux/kernel.h>
  15#include <linux/pci.h>
  16#include <linux/initrd.h>
  17#include <linux/of_platform.h>
  18
  19#include <asm/time.h>
  20#include <asm/prom.h>
  21#include <asm/mpic.h>
  22#include <asm/pci-bridge.h>
  23
  24#include "mpc10x.h"
  25
  26
  27static const struct of_device_id storcenter_of_bus[] __initconst = {
  28        { .name = "soc", },
  29        {},
  30};
  31
  32static int __init storcenter_device_probe(void)
  33{
  34        of_platform_bus_probe(NULL, storcenter_of_bus, NULL);
  35        return 0;
  36}
  37machine_device_initcall(storcenter, storcenter_device_probe);
  38
  39
  40static int __init storcenter_add_bridge(struct device_node *dev)
  41{
  42#ifdef CONFIG_PCI
  43        int len;
  44        struct pci_controller *hose;
  45        const int *bus_range;
  46
  47        printk("Adding PCI host bridge %pOF\n", dev);
  48
  49        hose = pcibios_alloc_controller(dev);
  50        if (hose == NULL)
  51                return -ENOMEM;
  52
  53        bus_range = of_get_property(dev, "bus-range", &len);
  54        hose->first_busno = bus_range ? bus_range[0] : 0;
  55        hose->last_busno = bus_range ? bus_range[1] : 0xff;
  56
  57        setup_indirect_pci(hose, MPC10X_MAPB_CNFG_ADDR, MPC10X_MAPB_CNFG_DATA, 0);
  58
  59        /* Interpret the "ranges" property */
  60        /* This also maps the I/O region and sets isa_io/mem_base */
  61        pci_process_bridge_OF_ranges(hose, dev, 1);
  62#endif
  63
  64        return 0;
  65}
  66
  67static void __init storcenter_setup_arch(void)
  68{
  69        struct device_node *np;
  70
  71        /* Lookup PCI host bridges */
  72        for_each_compatible_node(np, "pci", "mpc10x-pci")
  73                storcenter_add_bridge(np);
  74
  75        printk(KERN_INFO "IOMEGA StorCenter\n");
  76}
  77
  78/*
  79 * Interrupt setup and service.  Interrupts on the turbostation come
  80 * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
  81 */
  82static void __init storcenter_init_IRQ(void)
  83{
  84        struct mpic *mpic;
  85
  86        mpic = mpic_alloc(NULL, 0, 0, 16, 0, " OpenPIC  ");
  87        BUG_ON(mpic == NULL);
  88
  89        /*
  90         * 16 Serial Interrupts followed by 16 Internal Interrupts.
  91         * I2C is the second internal, so it is at 17, 0x11020.
  92         */
  93        mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200);
  94        mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000);
  95
  96        mpic_init(mpic);
  97}
  98
  99static void __noreturn storcenter_restart(char *cmd)
 100{
 101        local_irq_disable();
 102
 103        /* Set exception prefix high - to the firmware */
 104        _nmask_and_or_msr(0, MSR_IP);
 105
 106        /* Wait for reset to happen */
 107        for (;;) ;
 108}
 109
 110static int __init storcenter_probe(void)
 111{
 112        return of_machine_is_compatible("iomega,storcenter");
 113}
 114
 115define_machine(storcenter){
 116        .name                   = "IOMEGA StorCenter",
 117        .probe                  = storcenter_probe,
 118        .setup_arch             = storcenter_setup_arch,
 119        .init_IRQ               = storcenter_init_IRQ,
 120        .get_irq                = mpic_get_irq,
 121        .restart                = storcenter_restart,
 122        .calibrate_decr         = generic_calibrate_decr,
 123};
 124