LXR linux/arch/powerpc/platforms/82xx/pq2.c

   1/*
   2 * Common PowerQUICC II code.
   3 *
   4 * Author: Scott Wood <scottwood@freescale.com>
   5 * Copyright (c) 2007 Freescale Semiconductor
   6 *
   7 * Based on code by Vitaly Bordug <vbordug@ru.mvista.com>
   8 * pq2_restart fix by Wade Farnsworth <wfarnsworth@mvista.com>
   9 * Copyright (c) 2006 MontaVista Software, Inc.
  10 *
  11 * This program is free software; you can redistribute  it and/or modify it
  12 * under  the terms of  the GNU General  Public License as published by the
  13 * Free Software Foundation;  either version 2 of the  License, or (at your
  14 * option) any later version.
  15 */
  16
  17#include <asm/cpm2.h>
  18#include <asm/io.h>
  19#include <asm/pci-bridge.h>
  20
  21#include <platforms/82xx/pq2.h>
  22
  23#define RMR_CSRE 0x00000001
  24
  25void pq2_restart(char *cmd)
  26{
  27        local_irq_disable();
  28        setbits32(&cpm2_immr->im_clkrst.car_rmr, RMR_CSRE);
  29
  30        /* Clear the ME,EE,IR & DR bits in MSR to cause checkstop */
  31        mtmsr(mfmsr() & ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR));
  32        in_8(&cpm2_immr->im_clkrst.res[0]);
  33
  34        panic("Restart failed\n");
  35}
  36
  37#ifdef CONFIG_PCI
  38static int pq2_pci_exclude_device(struct pci_controller *hose,
  39                                  u_char bus, u8 devfn)
  40{
  41        if (bus == 0 && PCI_SLOT(devfn) == 0)
  42                return PCIBIOS_DEVICE_NOT_FOUND;
  43        else
  44                return PCIBIOS_SUCCESSFUL;
  45}
  46
  47static void __init pq2_pci_add_bridge(struct device_node *np)
  48{
  49        struct pci_controller *hose;
  50        struct resource r;
  51
  52        if (of_address_to_resource(np, 0, &r) || r.end - r.start < 0x10b)
  53                goto err;
  54
  55        pci_add_flags(PCI_REASSIGN_ALL_BUS);
  56
  57        hose = pcibios_alloc_controller(np);
  58        if (!hose)
  59                return;
  60
  61        hose->dn = np;
  62
  63        setup_indirect_pci(hose, r.start + 0x100, r.start + 0x104, 0);
  64        pci_process_bridge_OF_ranges(hose, np, 1);
  65
  66        return;
  67
  68err:
  69        printk(KERN_ERR "No valid PCI reg property in device tree\n");
  70}
  71
  72void __init pq2_init_pci(void)
  73{
  74        struct device_node *np;
  75
  76        ppc_md.pci_exclude_device = pq2_pci_exclude_device;
  77
  78        for_each_compatible_node(np, NULL, "fsl,pq2-pci")
  79                pq2_pci_add_bridge(np);
  80}
  81#endif
  82