/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
 43extern int uli_exclude_device(struct pci_controller *hose,
 44				u_char bus, u_char devfn);
 45
 46static 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
 57static void __init
 58mpc86xx_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
 79static void
 80mpc86xx_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 */
 93static 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
107static const struct of_device_id of_bus_ids[] __initconst = {
108	{ .compatible = "fsl,srio", },
109	{},
110};
111
112static 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}
119machine_arch_initcall(mpc86xx_hpcn, declare_of_platform_devices);
120
121define_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};