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