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/errno.h>
  26 #include <linux/kernel.h>
  27 #include <linux/delay.h>
  28 #include <linux/console.h>
  29 #include <linux/pci.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         /* no iommu yet */
  76         pci_dma_ops = &dma_direct_ops;
  77
  78         /* Lookup PCI hosts */
  79         pas_pci_init();
  80
  81 #ifdef CONFIG_DUMMY_CONSOLE
  82         conswitchp = &dummy_con;
  83 #endif
  84
  85         printk(KERN_DEBUG "Using default idle loop\n");
  86 }
  87
  88 /* No legacy IO on our parts */
  89 static int pas_check_legacy_ioport(unsigned int baseport)
  90 {
  91         return -ENODEV;
  92 }
  93
  94 static __init void pas_init_IRQ(void)
  95 {
  96         struct device_node *np;
  97         struct device_node *root, *mpic_node;
  98         unsigned long openpic_addr;
  99         const unsigned int *opprop;
 100         int naddr, opplen;
 101         struct mpic *mpic;
 102
 103         mpic_node = NULL;
 104
 105         for_each_node_by_type(np, "interrupt-controller")
 106                 if (device_is_compatible(np, "open-pic")) {
 107                         mpic_node = np;
 108                         break;
 109                 }
 110         if (!mpic_node)
 111                 for_each_node_by_type(np, "open-pic") {
 112                         mpic_node = np;
 113                         break;
 114                 }
 115         if (!mpic_node) {
 116                 printk(KERN_ERR
 117                         "Failed to locate the MPIC interrupt controller\n");
 118                 return;
 119         }
 120
 121         /* Find address list in /platform-open-pic */
 122         root = of_find_node_by_path("/");
 123         naddr = prom_n_addr_cells(root);
 124         opprop = get_property(root, "platform-open-pic", &opplen);
 125         if (!opprop) {
 126                 printk(KERN_ERR "No platform-open-pic property.\n");
 127                 of_node_put(root);
 128                 return;
 129         }
 130         openpic_addr = of_read_number(opprop, naddr);
 131         printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
 132         of_node_put(root);
 133
 134         mpic = mpic_alloc(mpic_node, openpic_addr, MPIC_PRIMARY, 0, 0,
 135                           " PAS-OPIC  ");
 136         BUG_ON(!mpic);
 137
 138         mpic_assign_isu(mpic, 0, openpic_addr + 0x10000);
 139         mpic_init(mpic);
 140         of_node_put(mpic_node);
 141         of_node_put(root);
 142 }
 143
 144 static void __init pas_progress(char *s, unsigned short hex)
 145 {
 146         printk("[%04x] : %s\n", hex, s ? s : "");
 147 }
 148
 149
 150 /*
 151  * Called very early, MMU is off, device-tree isn't unflattened
 152  */
 153 static int __init pas_probe(void)
 154 {
 155         unsigned long root = of_get_flat_dt_root();
 156
 157         if (!of_flat_dt_is_compatible(root, "PA6T-1682M"))
 158                 return 0;
 159
 160         hpte_init_native();
 161
 162         return 1;
 163 }
 164
 165 define_machine(pas) {
 166         .name                   = "PA Semi PA6T-1682M",
 167         .probe                  = pas_probe,
 168         .setup_arch             = pas_setup_arch,
 169         .init_IRQ               = pas_init_IRQ,
 170         .get_irq                = mpic_get_irq,
 171         .restart                = pas_restart,
 172         .power_off              = pas_power_off,
 173         .halt                   = pas_halt,
 174         .get_boot_time          = pas_get_boot_time,
 175         .calibrate_decr         = generic_calibrate_decr,
 176         .check_legacy_ioport    = pas_check_legacy_ioport,
 177         .progress               = pas_progress,
 178 };