arch/powerpc/platforms/86xx/sbc8641d.c

   1 /*
   2  * SBC8641D board specific routines
   3  *
   4  * Copyright 2008 Wind River Systems Inc.
   5  *
   6  * By Paul Gortmaker (see MAINTAINERS for contact information)
   7  *
   8  * Based largely on the 8641 HPCN support by Freescale Semiconductor Inc.
   9  *
  10  * This program is free software; you can redistribute  it and/or modify it
  11  * under  the terms of  the GNU General  Public License as published by the
  12  * Free Software Foundation;  either version 2 of the  License, or (at your
  13  * option) any later version.
  14  */
  15
  16 #include <linux/stddef.h>
  17 #include <linux/kernel.h>
  18 #include <linux/pci.h>
  19 #include <linux/kdev_t.h>
  20 #include <linux/delay.h>
  21 #include <linux/seq_file.h>
  22 #include <linux/of_platform.h>
  23
  24 #include <asm/system.h>
  25 #include <asm/time.h>
  26 #include <asm/machdep.h>
  27 #include <asm/pci-bridge.h>
  28 #include <asm/mpc86xx.h>
  29 #include <asm/prom.h>
  30 #include <mm/mmu_decl.h>
  31 #include <asm/udbg.h>
  32
  33 #include <asm/mpic.h>
  34
  35 #include <sysdev/fsl_pci.h>
  36 #include <sysdev/fsl_soc.h>
  37
  38 #include "mpc86xx.h"
  39
  40 static void __init
  41 sbc8641_setup_arch(void)
  42 {
  43 #ifdef CONFIG_PCI
  44         struct device_node *np;
  45 #endif
  46
  47         if (ppc_md.progress)
  48                 ppc_md.progress("sbc8641_setup_arch()", 0);
  49
  50 #ifdef CONFIG_PCI
  51         for_each_compatible_node(np, "pci", "fsl,mpc8641-pcie")
  52                 fsl_add_bridge(np, 0);
  53 #endif
  54
  55         printk("SBC8641 board from Wind River\n");
  56
  57 #ifdef CONFIG_SMP
  58         mpc86xx_smp_init();
  59 #endif
  60 }
  61
  62
  63 static void
  64 sbc8641_show_cpuinfo(struct seq_file *m)
  65 {
  66         uint svid = mfspr(SPRN_SVR);
  67
  68         seq_printf(m, "Vendor\t\t: Wind River Systems\n");
  69
  70         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
  71 }
  72
  73
  74 /*
  75  * Called very early, device-tree isn't unflattened
  76  */
  77 static int __init sbc8641_probe(void)
  78 {
  79         unsigned long root = of_get_flat_dt_root();
  80
  81         if (of_flat_dt_is_compatible(root, "wind,sbc8641"))
  82                 return 1;       /* Looks good */
  83
  84         return 0;
  85 }
  86
  87 static long __init
  88 mpc86xx_time_init(void)
  89 {
  90         unsigned int temp;
  91
  92         /* Set the time base to zero */
  93         mtspr(SPRN_TBWL, 0);
  94         mtspr(SPRN_TBWU, 0);
  95
  96         temp = mfspr(SPRN_HID0);
  97         temp |= HID0_TBEN;
  98         mtspr(SPRN_HID0, temp);
  99         asm volatile("isync");
 100
 101         return 0;
 102 }
 103
 104 static __initdata struct of_device_id of_bus_ids[] = {
 105         { .compatible = "simple-bus", },
 106         {},
 107 };
 108
 109 static int __init declare_of_platform_devices(void)
 110 {
 111         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 112
 113         return 0;
 114 }
 115 machine_device_initcall(sbc8641, declare_of_platform_devices);
 116
 117 define_machine(sbc8641) {
 118         .name                   = "SBC8641D",
 119         .probe                  = sbc8641_probe,
 120         .setup_arch             = sbc8641_setup_arch,
 121         .init_IRQ               = mpc86xx_init_irq,
 122         .show_cpuinfo           = sbc8641_show_cpuinfo,
 123         .get_irq                = mpic_get_irq,
 124         .restart                = fsl_rstcr_restart,
 125         .time_init              = mpc86xx_time_init,
 126         .calibrate_decr         = generic_calibrate_decr,
 127         .progress               = udbg_progress,
 128 #ifdef CONFIG_PCI
 129         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 130 #endif
 131 };