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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * MPC86xx HPCN board specific routines
   4  *
   5  * Recode: ZHANG WEI <wei.zhang@freescale.com>
   6  * Initial author: Xianghua Xiao <x.xiao@freescale.com>
   7  *
   8  * Copyright 2006 Freescale Semiconductor Inc.
   9  */
  10
  11 #include <linux/stddef.h>
  12 #include <linux/kernel.h>
  13 #include <linux/pci.h>
  14 #include <linux/kdev_t.h>
  15 #include <linux/delay.h>
  16 #include <linux/seq_file.h>
  17 #include <linux/of_platform.h>
  18
  19 #include <asm/time.h>
  20 #include <asm/machdep.h>
  21 #include <asm/pci-bridge.h>
  22 #include <mm/mmu_decl.h>
  23 #include <asm/udbg.h>
  24 #include <asm/swiotlb.h>
  25
  26 #include <asm/mpic.h>
  27
  28 #include <sysdev/fsl_pci.h>
  29 #include <sysdev/fsl_soc.h>
  30
  31 #include "mpc86xx.h"
  32
  33 #undef DEBUG
  34
  35 #ifdef DEBUG
  36 #define DBG(fmt...) do { printk(KERN_ERR fmt); } while(0)
  37 #else
  38 #define DBG(fmt...) do { } while(0)
  39 #endif
  40
  41 #ifdef CONFIG_PCI
  42 extern int uli_exclude_device(struct pci_controller *hose,
  43                                 u_char bus, u_char devfn);
  44
  45 static int mpc86xx_exclude_device(struct pci_controller *hose,
  46                                    u_char bus, u_char devfn)
  47 {
  48         if (hose->dn == fsl_pci_primary)
  49                 return uli_exclude_device(hose, bus, devfn);
  50
  51         return PCIBIOS_SUCCESSFUL;
  52 }
  53 #endif /* CONFIG_PCI */
  54
  55
  56 static void __init
  57 mpc86xx_hpcn_setup_arch(void)
  58 {
  59         if (ppc_md.progress)
  60                 ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0);
  61
  62 #ifdef CONFIG_PCI
  63         ppc_md.pci_exclude_device = mpc86xx_exclude_device;
  64 #endif
  65
  66         printk("MPC86xx HPCN board from Freescale Semiconductor\n");
  67
  68 #ifdef CONFIG_SMP
  69         mpc86xx_smp_init();
  70 #endif
  71
  72         fsl_pci_assign_primary();
  73
  74         swiotlb_detect_4g();
  75 }
  76
  77
  78 static void
  79 mpc86xx_hpcn_show_cpuinfo(struct seq_file *m)
  80 {
  81         uint svid = mfspr(SPRN_SVR);
  82
  83         seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
  84
  85         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
  86 }
  87
  88
  89 /*
  90  * Called very early, device-tree isn't unflattened
  91  */
  92 static int __init mpc86xx_hpcn_probe(void)
  93 {
  94         if (of_machine_is_compatible("fsl,mpc8641hpcn"))
  95                 return 1;       /* Looks good */
  96
  97         return 0;
  98 }
  99
 100 static const struct of_device_id of_bus_ids[] __initconst = {
 101         { .compatible = "fsl,srio", },
 102         {},
 103 };
 104
 105 static int __init declare_of_platform_devices(void)
 106 {
 107         mpc86xx_common_publish_devices();
 108         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 109
 110         return 0;
 111 }
 112 machine_arch_initcall(mpc86xx_hpcn, declare_of_platform_devices);
 113
 114 define_machine(mpc86xx_hpcn) {
 115         .name                   = "MPC86xx HPCN",
 116         .probe                  = mpc86xx_hpcn_probe,
 117         .setup_arch             = mpc86xx_hpcn_setup_arch,
 118         .init_IRQ               = mpc86xx_init_irq,
 119         .show_cpuinfo           = mpc86xx_hpcn_show_cpuinfo,
 120         .get_irq                = mpic_get_irq,
 121         .time_init              = mpc86xx_time_init,
 122         .calibrate_decr         = generic_calibrate_decr,
 123         .progress               = udbg_progress,
 124 #ifdef CONFIG_PCI
 125         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 126 #endif
 127 };