Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * MPC85xx DS Board Setup
 *
 * Author Xianghua Xiao (x.xiao@freescale.com)
 * Roy Zang <tie-fei.zang@freescale.com>
 * 	- Add PCI/PCI Exprees support
 * Copyright 2007 Freescale Semiconductor Inc.
 */
 
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/interrupt.h>
#include <linux/of_platform.h>
 
#include <asm/time.h>
#include <asm/machdep.h>
#include <asm/pci-bridge.h>
#include <mm/mmu_decl.h>
#include <asm/prom.h>
#include <asm/udbg.h>
#include <asm/mpic.h>
#include <asm/i8259.h>
#include <asm/swiotlb.h>
 
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>
#include "smp.h"
 
#include "mpc85xx.h"
 
#undef DEBUG
 
#ifdef DEBUG
#define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
#else
#define DBG(fmt, args...)
#endif
 
#ifdef CONFIG_PPC_I8259
static void mpc85xx_8259_cascade(struct irq_desc *desc)
{
<------>struct irq_chip *chip = irq_desc_get_chip(desc);
<------>unsigned int cascade_irq = i8259_irq();
 
<------>if (cascade_irq) {
<------><------>generic_handle_irq(cascade_irq);
<------>}
<------>chip->irq_eoi(&desc->irq_data);
}
#endif	/* CONFIG_PPC_I8259 */
 
void __init mpc85xx_ds_pic_init(void)
{
<------>struct mpic *mpic;
#ifdef CONFIG_PPC_I8259
<------>struct device_node *np;
<------>struct device_node *cascade_node = NULL;
<------>int cascade_irq;
#endif
<------>if (of_machine_is_compatible("fsl,MPC8572DS-CAMP")) {
<------><------>mpic = mpic_alloc(NULL, 0,
<------><------><------>MPIC_NO_RESET |
<------><------><------>MPIC_BIG_ENDIAN |
<------><------><------>MPIC_SINGLE_DEST_CPU,
<------><------><------>0, 256, " OpenPIC  ");
<------>} else {
<------><------>mpic = mpic_alloc(NULL, 0,
<------><------><------>  MPIC_BIG_ENDIAN |
<------><------><------>  MPIC_SINGLE_DEST_CPU,
<------><------><------>0, 256, " OpenPIC  ");
<------>}
 
<------>BUG_ON(mpic == NULL);
<------>mpic_init(mpic);
 
#ifdef CONFIG_PPC_I8259
<------>/* Initialize the i8259 controller */
<------>for_each_node_by_type(np, "interrupt-controller")
<------>    if (of_device_is_compatible(np, "chrp,iic")) {
<------><------>cascade_node = np;
<------><------>break;
<------>}
 
<------>if (cascade_node == NULL) {
<------><------>printk(KERN_DEBUG "Could not find i8259 PIC\n");
<------><------>return;
<------>}
 
<------>cascade_irq = irq_of_parse_and_map(cascade_node, 0);
<------>if (!cascade_irq) {
<------><------>printk(KERN_ERR "Failed to map cascade interrupt\n");
<------><------>return;
<------>}
 
<------>DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
 
<------>i8259_init(cascade_node, 0);
<------>of_node_put(cascade_node);
 
<------>irq_set_chained_handler(cascade_irq, mpc85xx_8259_cascade);
#endif	/* CONFIG_PPC_I8259 */
}
 
#ifdef CONFIG_PCI
extern int uli_exclude_device(struct pci_controller *hose,
<------><------><------><------>u_char bus, u_char devfn);
 
static struct device_node *pci_with_uli;
 
static int mpc85xx_exclude_device(struct pci_controller *hose,
<------><------><------><------>   u_char bus, u_char devfn)
{
<------>if (hose->dn == pci_with_uli)
<------><------>return uli_exclude_device(hose, bus, devfn);
 
<------>return PCIBIOS_SUCCESSFUL;
}
#endif	/* CONFIG_PCI */
 
static void __init mpc85xx_ds_uli_init(void)
{
#ifdef CONFIG_PCI
<------>struct device_node *node;
 
<------>/* See if we have a ULI under the primary */
 
<------>node = of_find_node_by_name(NULL, "uli1575");
<------>while ((pci_with_uli = of_get_parent(node))) {
<------><------>of_node_put(node);
<------><------>node = pci_with_uli;
 
<------><------>if (pci_with_uli == fsl_pci_primary) {
<------><------><------>ppc_md.pci_exclude_device = mpc85xx_exclude_device;
<------><------><------>break;
<------><------>}
<------>}
#endif
}
 
/*
 * Setup the architecture
 */
static void __init mpc85xx_ds_setup_arch(void)
{
<------>if (ppc_md.progress)
<------><------>ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
 
<------>swiotlb_detect_4g();
<------>fsl_pci_assign_primary();
<------>mpc85xx_ds_uli_init();
<------>mpc85xx_smp_init();
 
<------>printk("MPC85xx DS board from Freescale Semiconductor\n");
}
 
/*
 * Called very early, device-tree isn't unflattened
 */
static int __init mpc8544_ds_probe(void)
{
<------>return !!of_machine_is_compatible("MPC8544DS");
}
 
machine_arch_initcall(mpc8544_ds, mpc85xx_common_publish_devices);
machine_arch_initcall(mpc8572_ds, mpc85xx_common_publish_devices);
machine_arch_initcall(p2020_ds, mpc85xx_common_publish_devices);
 
/*
 * Called very early, device-tree isn't unflattened
 */
static int __init mpc8572_ds_probe(void)
{
<------>return !!of_machine_is_compatible("fsl,MPC8572DS");
}
 
/*
 * Called very early, device-tree isn't unflattened
 */
static int __init p2020_ds_probe(void)
{
<------>return !!of_machine_is_compatible("fsl,P2020DS");
}
 
define_machine(mpc8544_ds) {
<------>.name			= "MPC8544 DS",
<------>.probe			= mpc8544_ds_probe,
<------>.setup_arch		= mpc85xx_ds_setup_arch,
<------>.init_IRQ		= mpc85xx_ds_pic_init,
#ifdef CONFIG_PCI
<------>.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
<------>.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
#endif
<------>.get_irq		= mpic_get_irq,
<------>.calibrate_decr		= generic_calibrate_decr,
<------>.progress		= udbg_progress,
};
 
define_machine(mpc8572_ds) {
<------>.name			= "MPC8572 DS",
<------>.probe			= mpc8572_ds_probe,
<------>.setup_arch		= mpc85xx_ds_setup_arch,
<------>.init_IRQ		= mpc85xx_ds_pic_init,
#ifdef CONFIG_PCI
<------>.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
<------>.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
#endif
<------>.get_irq		= mpic_get_irq,
<------>.calibrate_decr		= generic_calibrate_decr,
<------>.progress		= udbg_progress,
};
 
define_machine(p2020_ds) {
<------>.name			= "P2020 DS",
<------>.probe			= p2020_ds_probe,
<------>.setup_arch		= mpc85xx_ds_setup_arch,
<------>.init_IRQ		= mpc85xx_ds_pic_init,
#ifdef CONFIG_PCI
<------>.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
<------>.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
#endif
<------>.get_irq		= mpic_get_irq,
<------>.calibrate_decr		= generic_calibrate_decr,
<------>.progress		= udbg_progress,
};