arch/powerpc/platforms/85xx/sbc8548.c

   1 /*
   2  * Wind River SBC8548 setup and early boot code.
   3  *
   4  * Copyright 2007 Wind River Systems Inc.
   5  *
   6  * By Paul Gortmaker (see MAINTAINERS for contact information)
   7  *
   8  * Based largely on the MPC8548CDS support - Copyright 2005 Freescale Inc.
   9  *
  10  *
  11  * This program is free software; you can redistribute  it and/or modify it
  12  * under  the terms of  the GNU General  Public License as published by the
  13  * Free Software Foundation;  either version 2 of the  License, or (at your
  14  * option) any later version.
  15  */
  16
  17 #include <linux/stddef.h>
  18 #include <linux/kernel.h>
  19 #include <linux/init.h>
  20 #include <linux/errno.h>
  21 #include <linux/reboot.h>
  22 #include <linux/pci.h>
  23 #include <linux/kdev_t.h>
  24 #include <linux/major.h>
  25 #include <linux/console.h>
  26 #include <linux/delay.h>
  27 #include <linux/seq_file.h>
  28 #include <linux/initrd.h>
  29 #include <linux/module.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/fsl_devices.h>
  32 #include <linux/of_platform.h>
  33
  34 #include <asm/system.h>
  35 #include <asm/pgtable.h>
  36 #include <asm/page.h>
  37 #include <asm/atomic.h>
  38 #include <asm/time.h>
  39 #include <asm/io.h>
  40 #include <asm/machdep.h>
  41 #include <asm/ipic.h>
  42 #include <asm/pci-bridge.h>
  43 #include <asm/irq.h>
  44 #include <mm/mmu_decl.h>
  45 #include <asm/prom.h>
  46 #include <asm/udbg.h>
  47 #include <asm/mpic.h>
  48
  49 #include <sysdev/fsl_soc.h>
  50 #include <sysdev/fsl_pci.h>
  51
  52 static void __init sbc8548_pic_init(void)
  53 {
  54         struct mpic *mpic;
  55         struct resource r;
  56         struct device_node *np = NULL;
  57
  58         np = of_find_node_by_type(np, "open-pic");
  59
  60         if (np == NULL) {
  61                 printk(KERN_ERR "Could not find open-pic node\n");
  62                 return;
  63         }
  64
  65         if (of_address_to_resource(np, 0, &r)) {
  66                 printk(KERN_ERR "Failed to map mpic register space\n");
  67                 of_node_put(np);
  68                 return;
  69         }
  70
  71         mpic = mpic_alloc(np, r.start,
  72                         MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
  73                         0, 256, " OpenPIC  ");
  74         BUG_ON(mpic == NULL);
  75
  76         /* Return the mpic node */
  77         of_node_put(np);
  78
  79         mpic_init(mpic);
  80 }
  81
  82 /*
  83  * Setup the architecture
  84  */
  85 static void __init sbc8548_setup_arch(void)
  86 {
  87 #ifdef CONFIG_PCI
  88         struct device_node *np;
  89 #endif
  90
  91         if (ppc_md.progress)
  92                 ppc_md.progress("sbc8548_setup_arch()", 0);
  93
  94 #ifdef CONFIG_PCI
  95         for_each_node_by_type(np, "pci") {
  96                 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
  97                     of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
  98                         struct resource rsrc;
  99                         of_address_to_resource(np, 0, &rsrc);
 100                         if ((rsrc.start & 0xfffff) == 0x8000)
 101                                 fsl_add_bridge(np, 1);
 102                         else
 103                                 fsl_add_bridge(np, 0);
 104                 }
 105         }
 106 #endif
 107 }
 108
 109 static void sbc8548_show_cpuinfo(struct seq_file *m)
 110 {
 111         uint pvid, svid, phid1;
 112         uint memsize = total_memory;
 113
 114         pvid = mfspr(SPRN_PVR);
 115         svid = mfspr(SPRN_SVR);
 116
 117         seq_printf(m, "Vendor\t\t: Wind River\n");
 118         seq_printf(m, "Machine\t\t: SBC8548\n");
 119         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
 120         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 121
 122         /* Display cpu Pll setting */
 123         phid1 = mfspr(SPRN_HID1);
 124         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 125
 126         /* Display the amount of memory */
 127         seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));
 128 }
 129
 130 static struct of_device_id __initdata of_bus_ids[] = {
 131         { .name = "soc", },
 132         { .type = "soc", },
 133         {},
 134 };
 135
 136 static int __init declare_of_platform_devices(void)
 137 {
 138         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 139
 140         return 0;
 141 }
 142 machine_device_initcall(sbc8548, declare_of_platform_devices);
 143
 144 /*
 145  * Called very early, device-tree isn't unflattened
 146  */
 147 static int __init sbc8548_probe(void)
 148 {
 149         unsigned long root = of_get_flat_dt_root();
 150
 151         return of_flat_dt_is_compatible(root, "SBC8548");
 152 }
 153
 154 define_machine(sbc8548) {
 155         .name           = "SBC8548",
 156         .probe          = sbc8548_probe,
 157         .setup_arch     = sbc8548_setup_arch,
 158         .init_IRQ       = sbc8548_pic_init,
 159         .show_cpuinfo   = sbc8548_show_cpuinfo,
 160         .get_irq        = mpic_get_irq,
 161         .restart        = fsl_rstcr_restart,
 162 #ifdef CONFIG_PCI
 163         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 164 #endif
 165         .calibrate_decr = generic_calibrate_decr,
 166         .progress       = udbg_progress,
 167 };