81 lines
1.8 KiB
C
81 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Common PowerQUICC II code.
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*
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* Author: Scott Wood <scottwood@freescale.com>
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* Copyright (c) 2007 Freescale Semiconductor
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*
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* Based on code by Vitaly Bordug <vbordug@ru.mvista.com>
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* pq2_restart fix by Wade Farnsworth <wfarnsworth@mvista.com>
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* Copyright (c) 2006 MontaVista Software, Inc.
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*/
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#include <linux/kprobes.h>
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#include <asm/cpm2.h>
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#include <asm/io.h>
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#include <asm/pci-bridge.h>
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#include <platforms/82xx/pq2.h>
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#define RMR_CSRE 0x00000001
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void __noreturn pq2_restart(char *cmd)
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{
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local_irq_disable();
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setbits32(&cpm2_immr->im_clkrst.car_rmr, RMR_CSRE);
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/* Clear the ME,EE,IR & DR bits in MSR to cause checkstop */
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mtmsr(mfmsr() & ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR));
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in_8(&cpm2_immr->im_clkrst.res[0]);
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panic("Restart failed\n");
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}
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NOKPROBE_SYMBOL(pq2_restart)
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#ifdef CONFIG_PCI
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static int pq2_pci_exclude_device(struct pci_controller *hose,
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u_char bus, u8 devfn)
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{
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if (bus == 0 && PCI_SLOT(devfn) == 0)
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return PCIBIOS_DEVICE_NOT_FOUND;
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else
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return PCIBIOS_SUCCESSFUL;
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}
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static void __init pq2_pci_add_bridge(struct device_node *np)
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{
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struct pci_controller *hose;
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struct resource r;
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if (of_address_to_resource(np, 0, &r) || r.end - r.start < 0x10b)
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goto err;
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pci_add_flags(PCI_REASSIGN_ALL_BUS);
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hose = pcibios_alloc_controller(np);
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if (!hose)
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return;
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hose->dn = np;
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setup_indirect_pci(hose, r.start + 0x100, r.start + 0x104, 0);
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pci_process_bridge_OF_ranges(hose, np, 1);
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return;
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err:
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printk(KERN_ERR "No valid PCI reg property in device tree\n");
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}
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void __init pq2_init_pci(void)
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{
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struct device_node *np;
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ppc_md.pci_exclude_device = pq2_pci_exclude_device;
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for_each_compatible_node(np, NULL, "fsl,pq2-pci")
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pq2_pci_add_bridge(np);
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}
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#endif
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