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/system.h>
  20#include <asm/time.h>
  21#include <asm/prom.h>
  22#include <asm/mpic.h>
  23#include <asm/pci-bridge.h>
  24
  25#include "mpc10x.h"
  26
  27
  28static __initdata struct of_device_id storcenter_of_bus[] = {
  29        { .name = "soc", },
  30        {},
  31};
  32
  33static int __init storcenter_device_probe(void)
  34{
  35        of_platform_bus_probe(NULL, storcenter_of_bus, NULL);
  36        return 0;
  37}
  38machine_device_initcall(storcenter, storcenter_device_probe);
  39
  40
  41static int __init storcenter_add_bridge(struct device_node *dev)
  42{
  43#ifdef CONFIG_PCI
  44        int len;
  45        struct pci_controller *hose;
  46        const int *bus_range;
  47
  48        printk("Adding PCI host bridge %s\n", dev->full_name);
  49
  50        hose = pcibios_alloc_controller(dev);
  51        if (hose == NULL)
  52                return -ENOMEM;
  53
  54        bus_range = of_get_property(dev, "bus-range", &len);
  55        hose->first_busno = bus_range ? bus_range[0] : 0;
  56        hose->last_busno = bus_range ? bus_range[1] : 0xff;
  57
  58        setup_indirect_pci(hose, MPC10X_MAPB_CNFG_ADDR, MPC10X_MAPB_CNFG_DATA, 0);
  59
  60        /* Interpret the "ranges" property */
  61        /* This also maps the I/O region and sets isa_io/mem_base */
  62        pci_process_bridge_OF_ranges(hose, dev, 1);
  63#endif
  64
  65        return 0;
  66}
  67
  68static void __init storcenter_setup_arch(void)
  69{
  70        struct device_node *np;
  71
  72        /* Lookup PCI host bridges */
  73        for_each_compatible_node(np, "pci", "mpc10x-pci")
  74                storcenter_add_bridge(np);
  75
  76        printk(KERN_INFO "IOMEGA StorCenter\n");
  77}
  78
  79/*
  80 * Interrupt setup and service.  Interrrupts on the turbostation come
  81 * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
  82 */
  83static void __init storcenter_init_IRQ(void)
  84{
  85        struct mpic *mpic;
  86        struct device_node *dnp;
  87        const void *prop;
  88        int size;
  89        phys_addr_t paddr;
  90
  91        dnp = of_find_node_by_type(NULL, "open-pic");
  92        if (dnp == NULL)
  93                return;
  94
  95        prop = of_get_property(dnp, "reg", &size);
  96        if (prop == NULL) {
  97                of_node_put(dnp);
  98                return;
  99        }
 100
 101        paddr = (phys_addr_t)of_translate_address(dnp, prop);
 102        mpic = mpic_alloc(dnp, paddr, MPIC_PRIMARY | MPIC_WANTS_RESET,
 103                        16, 32, " OpenPIC  ");
 104
 105        of_node_put(dnp);
 106
 107        BUG_ON(mpic == NULL);
 108
 109        /*
 110         * 16 Serial Interrupts followed by 16 Internal Interrupts.
 111         * I2C is the second internal, so it is at 17, 0x11020.
 112         */
 113        mpic_assign_isu(mpic, 0, paddr + 0x10200);
 114        mpic_assign_isu(mpic, 1, paddr + 0x11000);
 115
 116        mpic_init(mpic);
 117}
 118
 119static void storcenter_restart(char *cmd)
 120{
 121        local_irq_disable();
 122
 123        /* Set exception prefix high - to the firmware */
 124        _nmask_and_or_msr(0, MSR_IP);
 125
 126        /* Wait for reset to happen */
 127        for (;;) ;
 128}
 129
 130static int __init storcenter_probe(void)
 131{
 132        unsigned long root = of_get_flat_dt_root();
 133
 134        return of_flat_dt_is_compatible(root, "iomega,storcenter");
 135}
 136
 137define_machine(storcenter){
 138        .name                   = "IOMEGA StorCenter",
 139        .probe                  = storcenter_probe,
 140        .setup_arch             = storcenter_setup_arch,
 141        .init_IRQ               = storcenter_init_IRQ,
 142        .get_irq                = mpic_get_irq,
 143        .restart                = storcenter_restart,
 144        .calibrate_decr         = generic_calibrate_decr,
 145};
 146