forked from Minki/linux
316 lines
7.2 KiB
C
316 lines
7.2 KiB
C
/*
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* MPC85xx DS Board Setup
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*
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* Author Xianghua Xiao (x.xiao@freescale.com)
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* Roy Zang <tie-fei.zang@freescale.com>
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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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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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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 <linux/memblock.h>
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#include <asm/system.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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#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(unsigned int irq, 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 != NO_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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struct resource r;
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struct device_node *np;
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#ifdef CONFIG_PPC_I8259
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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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unsigned long root = of_get_flat_dt_root();
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np = of_find_node_by_type(NULL, "open-pic");
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if (np == NULL) {
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printk(KERN_ERR "Could not find open-pic node\n");
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return;
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}
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if (of_address_to_resource(np, 0, &r)) {
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printk(KERN_ERR "Failed to map mpic register space\n");
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of_node_put(np);
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return;
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}
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if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS-CAMP")) {
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mpic = mpic_alloc(np, r.start,
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MPIC_PRIMARY |
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MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS,
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0, 256, " OpenPIC ");
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} else {
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mpic = mpic_alloc(np, r.start,
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MPIC_PRIMARY | MPIC_WANTS_RESET |
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MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
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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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of_node_put(np);
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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 == NO_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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static int primary_phb_addr;
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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 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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struct device_node* node;
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struct resource rsrc;
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node = hose->dn;
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of_address_to_resource(node, 0, &rsrc);
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if ((rsrc.start & 0xfffff) == primary_phb_addr) {
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return uli_exclude_device(hose, bus, devfn);
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}
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return PCIBIOS_SUCCESSFUL;
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}
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#endif /* CONFIG_PCI */
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/*
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* Setup the architecture
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*/
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#ifdef CONFIG_SMP
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extern void __init mpc85xx_smp_init(void);
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#endif
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static void __init mpc85xx_ds_setup_arch(void)
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{
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#ifdef CONFIG_PCI
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struct device_node *np;
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struct pci_controller *hose;
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#endif
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dma_addr_t max = 0xffffffff;
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if (ppc_md.progress)
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ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
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#ifdef CONFIG_PCI
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for_each_node_by_type(np, "pci") {
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if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
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of_device_is_compatible(np, "fsl,mpc8548-pcie") ||
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of_device_is_compatible(np, "fsl,p2020-pcie")) {
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struct resource rsrc;
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of_address_to_resource(np, 0, &rsrc);
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if ((rsrc.start & 0xfffff) == primary_phb_addr)
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fsl_add_bridge(np, 1);
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else
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fsl_add_bridge(np, 0);
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hose = pci_find_hose_for_OF_device(np);
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max = min(max, hose->dma_window_base_cur +
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hose->dma_window_size);
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}
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}
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ppc_md.pci_exclude_device = mpc85xx_exclude_device;
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#endif
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#ifdef CONFIG_SMP
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mpc85xx_smp_init();
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#endif
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#ifdef CONFIG_SWIOTLB
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if (memblock_end_of_DRAM() > max) {
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ppc_swiotlb_enable = 1;
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set_pci_dma_ops(&swiotlb_dma_ops);
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ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
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}
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#endif
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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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unsigned long root = of_get_flat_dt_root();
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if (of_flat_dt_is_compatible(root, "MPC8544DS")) {
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#ifdef CONFIG_PCI
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primary_phb_addr = 0xb000;
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#endif
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return 1;
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}
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return 0;
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}
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static struct of_device_id __initdata mpc85xxds_ids[] = {
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{ .type = "soc", },
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{ .compatible = "soc", },
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{ .compatible = "simple-bus", },
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{ .compatible = "gianfar", },
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{},
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};
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static int __init mpc85xxds_publish_devices(void)
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{
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return of_platform_bus_probe(NULL, mpc85xxds_ids, NULL);
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}
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machine_device_initcall(mpc8544_ds, mpc85xxds_publish_devices);
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machine_device_initcall(mpc8572_ds, mpc85xxds_publish_devices);
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machine_device_initcall(p2020_ds, mpc85xxds_publish_devices);
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machine_arch_initcall(mpc8544_ds, swiotlb_setup_bus_notifier);
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machine_arch_initcall(mpc8572_ds, swiotlb_setup_bus_notifier);
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machine_arch_initcall(p2020_ds, swiotlb_setup_bus_notifier);
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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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unsigned long root = of_get_flat_dt_root();
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if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS")) {
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#ifdef CONFIG_PCI
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primary_phb_addr = 0x8000;
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#endif
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return 1;
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}
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return 0;
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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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unsigned long root = of_get_flat_dt_root();
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if (of_flat_dt_is_compatible(root, "fsl,P2020DS")) {
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#ifdef CONFIG_PCI
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primary_phb_addr = 0x9000;
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#endif
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return 1;
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}
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return 0;
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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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#endif
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.get_irq = mpic_get_irq,
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.restart = fsl_rstcr_restart,
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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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#endif
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.get_irq = mpic_get_irq,
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.restart = fsl_rstcr_restart,
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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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#endif
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.get_irq = mpic_get_irq,
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.restart = fsl_rstcr_restart,
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.calibrate_decr = generic_calibrate_decr,
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.progress = udbg_progress,
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};
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