arch/powerpc/platforms/86xx/mpc86xx_hpcn.c

   1 /*
   2  * MPC86xx HPCN board specific routines
   3  *
   4  * Recode: ZHANG WEI <wei.zhang@freescale.com>
   5  * Initial author: Xianghua Xiao <x.xiao@freescale.com>
   6  *
   7  * Copyright 2006 Freescale Semiconductor Inc.
   8  *
   9  * This program is free software; you can redistribute  it and/or modify it
  10  * under  the terms of  the GNU General  Public License as published by the
  11  * Free Software Foundation;  either version 2 of the  License, or (at your
  12  * option) any later version.
  13  */
  14
  15 #include <linux/stddef.h>
  16 #include <linux/kernel.h>
  17 #include <linux/pci.h>
  18 #include <linux/kdev_t.h>
  19 #include <linux/delay.h>
  20 #include <linux/seq_file.h>
  21 #include <linux/of_platform.h>
  22
  23 #include <asm/time.h>
  24 #include <asm/machdep.h>
  25 #include <asm/pci-bridge.h>
  26 #include <asm/prom.h>
  27 #include <mm/mmu_decl.h>
  28 #include <asm/udbg.h>
  29 #include <asm/swiotlb.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 #undef DEBUG
  39
  40 #ifdef DEBUG
  41 #define DBG(fmt...) do { printk(KERN_ERR fmt); } while(0)
  42 #else
  43 #define DBG(fmt...) do { } while(0)
  44 #endif
  45
  46 #ifdef CONFIG_PCI
  47 extern int uli_exclude_device(struct pci_controller *hose,
  48                                 u_char bus, u_char devfn);
  49
  50 static int mpc86xx_exclude_device(struct pci_controller *hose,
  51                                    u_char bus, u_char devfn)
  52 {
  53         if (hose->dn == fsl_pci_primary)
  54                 return uli_exclude_device(hose, bus, devfn);
  55
  56         return PCIBIOS_SUCCESSFUL;
  57 }
  58 #endif /* CONFIG_PCI */
  59
  60
  61 static void __init
  62 mpc86xx_hpcn_setup_arch(void)
  63 {
  64         if (ppc_md.progress)
  65                 ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0);
  66
  67 #ifdef CONFIG_PCI
  68         ppc_md.pci_exclude_device = mpc86xx_exclude_device;
  69 #endif
  70
  71         printk("MPC86xx HPCN board from Freescale Semiconductor\n");
  72
  73 #ifdef CONFIG_SMP
  74         mpc86xx_smp_init();
  75 #endif
  76
  77         fsl_pci_assign_primary();
  78
  79         swiotlb_detect_4g();
  80 }
  81
  82
  83 static void
  84 mpc86xx_hpcn_show_cpuinfo(struct seq_file *m)
  85 {
  86         uint svid = mfspr(SPRN_SVR);
  87
  88         seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
  89
  90         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
  91 }
  92
  93
  94 /*
  95  * Called very early, device-tree isn't unflattened
  96  */
  97 static int __init mpc86xx_hpcn_probe(void)
  98 {
  99         unsigned long root = of_get_flat_dt_root();
 100
 101         if (of_flat_dt_is_compatible(root, "fsl,mpc8641hpcn"))
 102                 return 1;       /* Looks good */
 103
 104         /* Be nice and don't give silent boot death.  Delete this in 2.6.27 */
 105         if (of_flat_dt_is_compatible(root, "mpc86xx")) {
 106                 pr_warning("WARNING: your dts/dtb is old. You must update before the next kernel release\n");
 107                 return 1;
 108         }
 109
 110         return 0;
 111 }
 112
 113 static long __init
 114 mpc86xx_time_init(void)
 115 {
 116         unsigned int temp;
 117
 118         /* Set the time base to zero */
 119         mtspr(SPRN_TBWL, 0);
 120         mtspr(SPRN_TBWU, 0);
 121
 122         temp = mfspr(SPRN_HID0);
 123         temp |= HID0_TBEN;
 124         mtspr(SPRN_HID0, temp);
 125         asm volatile("isync");
 126
 127         return 0;
 128 }
 129
 130 static __initdata struct of_device_id of_bus_ids[] = {
 131         { .compatible = "simple-bus", },
 132         { .compatible = "fsl,srio", },
 133         { .compatible = "gianfar", },
 134         { .compatible = "fsl,mpc8641-pcie", },
 135         {},
 136 };
 137
 138 static int __init declare_of_platform_devices(void)
 139 {
 140         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 141
 142         return 0;
 143 }
 144 machine_arch_initcall(mpc86xx_hpcn, declare_of_platform_devices);
 145 machine_arch_initcall(mpc86xx_hpcn, swiotlb_setup_bus_notifier);
 146
 147 define_machine(mpc86xx_hpcn) {
 148         .name                   = "MPC86xx HPCN",
 149         .probe                  = mpc86xx_hpcn_probe,
 150         .setup_arch             = mpc86xx_hpcn_setup_arch,
 151         .init_IRQ               = mpc86xx_init_irq,
 152         .show_cpuinfo           = mpc86xx_hpcn_show_cpuinfo,
 153         .get_irq                = mpic_get_irq,
 154         .restart                = fsl_rstcr_restart,
 155         .time_init              = mpc86xx_time_init,
 156         .calibrate_decr         = generic_calibrate_decr,
 157         .progress               = udbg_progress,
 158 #ifdef CONFIG_PCI
 159         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 160 #endif
 161 };