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/time.h>
  25 #include <asm/machdep.h>
  26 #include <asm/pci-bridge.h>
  27 #include <asm/prom.h>
  28 #include <mm/mmu_decl.h>
  29 #include <asm/udbg.h>
  30
  31 #include <asm/mpic.h>
  32
  33 #include <sysdev/fsl_pci.h>
  34 #include <sysdev/fsl_soc.h>
  35
  36 #include "mpc86xx.h"
  37
  38 static void __init
  39 sbc8641_setup_arch(void)
  40 {
  41         if (ppc_md.progress)
  42                 ppc_md.progress("sbc8641_setup_arch()", 0);
  43
  44         printk("SBC8641 board from Wind River\n");
  45
  46 #ifdef CONFIG_SMP
  47         mpc86xx_smp_init();
  48 #endif
  49
  50         fsl_pci_assign_primary();
  51 }
  52
  53
  54 static void
  55 sbc8641_show_cpuinfo(struct seq_file *m)
  56 {
  57         uint svid = mfspr(SPRN_SVR);
  58
  59         seq_printf(m, "Vendor\t\t: Wind River Systems\n");
  60
  61         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
  62 }
  63
  64
  65 /*
  66  * Called very early, device-tree isn't unflattened
  67  */
  68 static int __init sbc8641_probe(void)
  69 {
  70         unsigned long root = of_get_flat_dt_root();
  71
  72         if (of_flat_dt_is_compatible(root, "wind,sbc8641"))
  73                 return 1;       /* Looks good */
  74
  75         return 0;
  76 }
  77
  78 static long __init
  79 mpc86xx_time_init(void)
  80 {
  81         unsigned int temp;
  82
  83         /* Set the time base to zero */
  84         mtspr(SPRN_TBWL, 0);
  85         mtspr(SPRN_TBWU, 0);
  86
  87         temp = mfspr(SPRN_HID0);
  88         temp |= HID0_TBEN;
  89         mtspr(SPRN_HID0, temp);
  90         asm volatile("isync");
  91
  92         return 0;
  93 }
  94
  95 static __initdata struct of_device_id of_bus_ids[] = {
  96         { .compatible = "simple-bus", },
  97         { .compatible = "gianfar", },
  98         { .compatible = "fsl,mpc8641-pcie", },
  99         {},
 100 };
 101
 102 static int __init declare_of_platform_devices(void)
 103 {
 104         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 105
 106         return 0;
 107 }
 108 machine_arch_initcall(sbc8641, declare_of_platform_devices);
 109
 110 define_machine(sbc8641) {
 111         .name                   = "SBC8641D",
 112         .probe                  = sbc8641_probe,
 113         .setup_arch             = sbc8641_setup_arch,
 114         .init_IRQ               = mpc86xx_init_irq,
 115         .show_cpuinfo           = sbc8641_show_cpuinfo,
 116         .get_irq                = mpic_get_irq,
 117         .restart                = fsl_rstcr_restart,
 118         .time_init              = mpc86xx_time_init,
 119         .calibrate_decr         = generic_calibrate_decr,
 120         .progress               = udbg_progress,
 121 #ifdef CONFIG_PCI
 122         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 123 #endif
 124 };