arch/powerpc/platforms/pasemi/setup.c

   1 /*
   2  * Copyright (C) 2006 PA Semi, Inc
   3  *
   4  * Authors: Kip Walker, PA Semi
   5  *          Olof Johansson, PA Semi
   6  *
   7  * Maintained by: Olof Johansson <olof@lixom.net>
   8  *
   9  * Based on arch/powerpc/platforms/maple/setup.c
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  23  */
  24
  25 #include <linux/config.h>
  26 #include <linux/errno.h>
  27 #include <linux/kernel.h>
  28 #include <linux/delay.h>
  29 #include <linux/console.h>
  30
  31 #include <asm/prom.h>
  32 #include <asm/system.h>
  33 #include <asm/iommu.h>
  34 #include <asm/machdep.h>
  35 #include <asm/mpic.h>
  36 #include <asm/smp.h>
  37 #include <asm/time.h>
  38
  39 #include "pasemi.h"
  40
  41 static void pas_restart(char *cmd)
  42 {
  43         printk("restart unimplemented, looping...\n");
  44         for (;;) ;
  45 }
  46
  47 static void pas_power_off(void)
  48 {
  49         printk("power off unimplemented, looping...\n");
  50         for (;;) ;
  51 }
  52
  53 static void pas_halt(void)
  54 {
  55         pas_power_off();
  56 }
  57
  58 #ifdef CONFIG_SMP
  59 struct smp_ops_t pas_smp_ops = {
  60         .probe          = smp_mpic_probe,
  61         .message_pass   = smp_mpic_message_pass,
  62         .kick_cpu       = smp_generic_kick_cpu,
  63         .setup_cpu      = smp_mpic_setup_cpu,
  64         .give_timebase  = smp_generic_give_timebase,
  65         .take_timebase  = smp_generic_take_timebase,
  66 };
  67 #endif /* CONFIG_SMP */
  68
  69 void __init pas_setup_arch(void)
  70 {
  71 #ifdef CONFIG_SMP
  72         /* Setup SMP callback */
  73         smp_ops = &pas_smp_ops;
  74 #endif
  75         /* Lookup PCI hosts */
  76         pas_pci_init();
  77
  78 #ifdef CONFIG_DUMMY_CONSOLE
  79         conswitchp = &dummy_con;
  80 #endif
  81
  82         printk(KERN_DEBUG "Using default idle loop\n");
  83 }
  84
  85 static void iommu_dev_setup_null(struct pci_dev *dev) { }
  86 static void iommu_bus_setup_null(struct pci_bus *bus) { }
  87
  88 static void __init pas_init_early(void)
  89 {
  90         /* No iommu code yet */
  91         ppc_md.iommu_dev_setup = iommu_dev_setup_null;
  92         ppc_md.iommu_bus_setup = iommu_bus_setup_null;
  93         pci_direct_iommu_init();
  94 }
  95
  96 /* No legacy IO on our parts */
  97 static int pas_check_legacy_ioport(unsigned int baseport)
  98 {
  99         return -ENODEV;
 100 }
 101
 102 static __init void pas_init_IRQ(void)
 103 {
 104         struct device_node *np;
 105         struct device_node *root, *mpic_node;
 106         unsigned long openpic_addr;
 107         const unsigned int *opprop;
 108         int naddr, opplen;
 109         struct mpic *mpic;
 110
 111         mpic_node = NULL;
 112
 113         for_each_node_by_type(np, "interrupt-controller")
 114                 if (device_is_compatible(np, "open-pic")) {
 115                         mpic_node = np;
 116                         break;
 117                 }
 118         if (!mpic_node)
 119                 for_each_node_by_type(np, "open-pic") {
 120                         mpic_node = np;
 121                         break;
 122                 }
 123         if (!mpic_node) {
 124                 printk(KERN_ERR
 125                         "Failed to locate the MPIC interrupt controller\n");
 126                 return;
 127         }
 128
 129         /* Find address list in /platform-open-pic */
 130         root = of_find_node_by_path("/");
 131         naddr = prom_n_addr_cells(root);
 132         opprop = get_property(root, "platform-open-pic", &opplen);
 133         if (!opprop) {
 134                 printk(KERN_ERR "No platform-open-pic property.\n");
 135                 of_node_put(root);
 136                 return;
 137         }
 138         openpic_addr = of_read_number(opprop, naddr);
 139         printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
 140         of_node_put(root);
 141
 142         mpic = mpic_alloc(mpic_node, openpic_addr, MPIC_PRIMARY, 0, 0,
 143                           " PAS-OPIC  ");
 144         BUG_ON(!mpic);
 145
 146         mpic_assign_isu(mpic, 0, openpic_addr + 0x10000);
 147         mpic_init(mpic);
 148         of_node_put(mpic_node);
 149         of_node_put(root);
 150 }
 151
 152 static void __init pas_progress(char *s, unsigned short hex)
 153 {
 154         printk("[%04x] : %s\n", hex, s ? s : "");
 155 }
 156
 157
 158 /*
 159  * Called very early, MMU is off, device-tree isn't unflattened
 160  */
 161 static int __init pas_probe(void)
 162 {
 163         unsigned long root = of_get_flat_dt_root();
 164
 165         if (!of_flat_dt_is_compatible(root, "PA6T-1682M"))
 166                 return 0;
 167
 168         hpte_init_native();
 169
 170         return 1;
 171 }
 172
 173 define_machine(pas) {
 174         .name                   = "PA Semi PA6T-1682M",
 175         .probe                  = pas_probe,
 176         .setup_arch             = pas_setup_arch,
 177         .init_early             = pas_init_early,
 178         .init_IRQ               = pas_init_IRQ,
 179         .get_irq                = mpic_get_irq,
 180         .pcibios_fixup          = pas_pcibios_fixup,
 181         .restart                = pas_restart,
 182         .power_off              = pas_power_off,
 183         .halt                   = pas_halt,
 184         .get_boot_time          = pas_get_boot_time,
 185         .calibrate_decr         = generic_calibrate_decr,
 186         .check_legacy_ioport    = pas_check_legacy_ioport,
 187         .progress               = pas_progress,
 188 };