LXR linux/arch/powerpc/platforms/85xx/sbc8548.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Wind River SBC8548 setup and early boot code.
   4 *
   5 * Copyright 2007 Wind River Systems Inc.
   6 *
   7 * By Paul Gortmaker (see MAINTAINERS for contact information)
   8 *
   9 * Based largely on the MPC8548CDS support - Copyright 2005 Freescale Inc.
  10 */
  11
  12#include <linux/stddef.h>
  13#include <linux/kernel.h>
  14#include <linux/init.h>
  15#include <linux/errno.h>
  16#include <linux/reboot.h>
  17#include <linux/pci.h>
  18#include <linux/kdev_t.h>
  19#include <linux/major.h>
  20#include <linux/console.h>
  21#include <linux/delay.h>
  22#include <linux/seq_file.h>
  23#include <linux/initrd.h>
  24#include <linux/interrupt.h>
  25#include <linux/fsl_devices.h>
  26#include <linux/of_platform.h>
  27#include <linux/pgtable.h>
  28
  29#include <asm/page.h>
  30#include <linux/atomic.h>
  31#include <asm/time.h>
  32#include <asm/io.h>
  33#include <asm/machdep.h>
  34#include <asm/ipic.h>
  35#include <asm/pci-bridge.h>
  36#include <asm/irq.h>
  37#include <mm/mmu_decl.h>
  38#include <asm/prom.h>
  39#include <asm/udbg.h>
  40#include <asm/mpic.h>
  41
  42#include <sysdev/fsl_soc.h>
  43#include <sysdev/fsl_pci.h>
  44
  45#include "mpc85xx.h"
  46
  47static int sbc_rev;
  48
  49static void __init sbc8548_pic_init(void)
  50{
  51        struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
  52                        0, 256, " OpenPIC  ");
  53        BUG_ON(mpic == NULL);
  54        mpic_init(mpic);
  55}
  56
  57/* Extract the HW Rev from the EPLD on the board */
  58static int __init sbc8548_hw_rev(void)
  59{
  60        struct device_node *np;
  61        struct resource res;
  62        unsigned int *rev;
  63        int board_rev = 0;
  64
  65        np = of_find_compatible_node(NULL, NULL, "hw-rev");
  66        if (np == NULL) {
  67                printk("No HW-REV found in DTB.\n");
  68                return -ENODEV;
  69        }
  70
  71        of_address_to_resource(np, 0, &res);
  72        of_node_put(np);
  73
  74        rev = ioremap(res.start,sizeof(unsigned int));
  75        board_rev = (*rev) >> 28;
  76        iounmap(rev);
  77
  78        return board_rev;
  79}
  80
  81/*
  82 * Setup the architecture
  83 */
  84static void __init sbc8548_setup_arch(void)
  85{
  86        if (ppc_md.progress)
  87                ppc_md.progress("sbc8548_setup_arch()", 0);
  88
  89        fsl_pci_assign_primary();
  90
  91        sbc_rev = sbc8548_hw_rev();
  92}
  93
  94static void sbc8548_show_cpuinfo(struct seq_file *m)
  95{
  96        uint pvid, svid, phid1;
  97
  98        pvid = mfspr(SPRN_PVR);
  99        svid = mfspr(SPRN_SVR);
 100
 101        seq_printf(m, "Vendor\t\t: Wind River\n");
 102        seq_printf(m, "Machine\t\t: SBC8548 v%d\n", sbc_rev);
 103        seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
 104        seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 105
 106        /* Display cpu Pll setting */
 107        phid1 = mfspr(SPRN_HID1);
 108        seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 109}
 110
 111machine_arch_initcall(sbc8548, mpc85xx_common_publish_devices);
 112
 113/*
 114 * Called very early, device-tree isn't unflattened
 115 */
 116static int __init sbc8548_probe(void)
 117{
 118        return of_machine_is_compatible("SBC8548");
 119}
 120
 121define_machine(sbc8548) {
 122        .name           = "SBC8548",
 123        .probe          = sbc8548_probe,
 124        .setup_arch     = sbc8548_setup_arch,
 125        .init_IRQ       = sbc8548_pic_init,
 126        .show_cpuinfo   = sbc8548_show_cpuinfo,
 127        .get_irq        = mpic_get_irq,
 128#ifdef CONFIG_PCI
 129        .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 130        .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 131#endif
 132        .calibrate_decr = generic_calibrate_decr,
 133        .progress       = udbg_progress,
 134};
 135