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 <asm/prom.h>
  23 #include <mm/mmu_decl.h>
  24 #include <asm/udbg.h>
  25 #include <asm/swiotlb.h>
  26
  27 #include <asm/mpic.h>
  28
  29 #include <sysdev/fsl_pci.h>
  30 #include <sysdev/fsl_soc.h>
  31
  32 #include "mpc86xx.h"
  33
  34 #undef DEBUG
  35
  36 #ifdef DEBUG
  37 #define DBG(fmt...) do { printk(KERN_ERR fmt); } while(0)
  38 #else
  39 #define DBG(fmt...) do { } while(0)
  40 #endif
  41
  42 #ifdef CONFIG_PCI
  43 extern int uli_exclude_device(struct pci_controller *hose,
  44                                 u_char bus, u_char devfn);
  45
  46 static int mpc86xx_exclude_device(struct pci_controller *hose,
  47                                    u_char bus, u_char devfn)
  48 {
  49         if (hose->dn == fsl_pci_primary)
  50                 return uli_exclude_device(hose, bus, devfn);
  51
  52         return PCIBIOS_SUCCESSFUL;
  53 }
  54 #endif /* CONFIG_PCI */
  55
  56
  57 static void __init
  58 mpc86xx_hpcn_setup_arch(void)
  59 {
  60         if (ppc_md.progress)
  61                 ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0);
  62
  63 #ifdef CONFIG_PCI
  64         ppc_md.pci_exclude_device = mpc86xx_exclude_device;
  65 #endif
  66
  67         printk("MPC86xx HPCN board from Freescale Semiconductor\n");
  68
  69 #ifdef CONFIG_SMP
  70         mpc86xx_smp_init();
  71 #endif
  72
  73         fsl_pci_assign_primary();
  74
  75         swiotlb_detect_4g();
  76 }
  77
  78
  79 static void
  80 mpc86xx_hpcn_show_cpuinfo(struct seq_file *m)
  81 {
  82         uint svid = mfspr(SPRN_SVR);
  83
  84         seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
  85
  86         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
  87 }
  88
  89
  90 /*
  91  * Called very early, device-tree isn't unflattened
  92  */
  93 static int __init mpc86xx_hpcn_probe(void)
  94 {
  95         if (of_machine_is_compatible("fsl,mpc8641hpcn"))
  96                 return 1;       /* Looks good */
  97
  98         /* Be nice and don't give silent boot death.  Delete this in 2.6.27 */
  99         if (of_machine_is_compatible("mpc86xx")) {
 100                 pr_warn("WARNING: your dts/dtb is old. You must update before the next kernel release.\n");
 101                 return 1;
 102         }
 103
 104         return 0;
 105 }
 106
 107 static const struct of_device_id of_bus_ids[] __initconst = {
 108         { .compatible = "fsl,srio", },
 109         {},
 110 };
 111
 112 static int __init declare_of_platform_devices(void)
 113 {
 114         mpc86xx_common_publish_devices();
 115         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 116
 117         return 0;
 118 }
 119 machine_arch_initcall(mpc86xx_hpcn, declare_of_platform_devices);
 120
 121 define_machine(mpc86xx_hpcn) {
 122         .name                   = "MPC86xx HPCN",
 123         .probe                  = mpc86xx_hpcn_probe,
 124         .setup_arch             = mpc86xx_hpcn_setup_arch,
 125         .init_IRQ               = mpc86xx_init_irq,
 126         .show_cpuinfo           = mpc86xx_hpcn_show_cpuinfo,
 127         .get_irq                = mpic_get_irq,
 128         .time_init              = mpc86xx_time_init,
 129         .calibrate_decr         = generic_calibrate_decr,
 130         .progress               = udbg_progress,
 131 #ifdef CONFIG_PCI
 132         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 133 #endif
 134 };