root/arch/powerpc/platforms/82xx/pq2.c

DEFINITIONS

1. pq2_restart
2. pq2_pci_exclude_device
3. pq2_pci_add_bridge
4. pq2_init_pci

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Common PowerQUICC II code.
   4  *
   5  * Author: Scott Wood <scottwood@freescale.com>
   6  * Copyright (c) 2007 Freescale Semiconductor
   7  *
   8  * Based on code by Vitaly Bordug <vbordug@ru.mvista.com>
   9  * pq2_restart fix by Wade Farnsworth <wfarnsworth@mvista.com>
  10  * Copyright (c) 2006 MontaVista Software, Inc.
  11  */
  12 
  13 #include <asm/cpm2.h>
  14 #include <asm/io.h>
  15 #include <asm/pci-bridge.h>
  16 
  17 #include <platforms/82xx/pq2.h>
  18 
  19 #define RMR_CSRE 0x00000001
  20 
  21 void __noreturn pq2_restart(char *cmd)
  22 {
  23         local_irq_disable();
  24         setbits32(&cpm2_immr->im_clkrst.car_rmr, RMR_CSRE);
  25 
  26         /* Clear the ME,EE,IR & DR bits in MSR to cause checkstop */
  27         mtmsr(mfmsr() & ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR));
  28         in_8(&cpm2_immr->im_clkrst.res[0]);
  29 
  30         panic("Restart failed\n");
  31 }
  32 
  33 #ifdef CONFIG_PCI
  34 static int pq2_pci_exclude_device(struct pci_controller *hose,
  35                                   u_char bus, u8 devfn)
  36 {
  37         if (bus == 0 && PCI_SLOT(devfn) == 0)
  38                 return PCIBIOS_DEVICE_NOT_FOUND;
  39         else
  40                 return PCIBIOS_SUCCESSFUL;
  41 }
  42 
  43 static void __init pq2_pci_add_bridge(struct device_node *np)
  44 {
  45         struct pci_controller *hose;
  46         struct resource r;
  47 
  48         if (of_address_to_resource(np, 0, &r) || r.end - r.start < 0x10b)
  49                 goto err;
  50 
  51         pci_add_flags(PCI_REASSIGN_ALL_BUS);
  52 
  53         hose = pcibios_alloc_controller(np);
  54         if (!hose)
  55                 return;
  56 
  57         hose->dn = np;
  58 
  59         setup_indirect_pci(hose, r.start + 0x100, r.start + 0x104, 0);
  60         pci_process_bridge_OF_ranges(hose, np, 1);
  61 
  62         return;
  63 
  64 err:
  65         printk(KERN_ERR "No valid PCI reg property in device tree\n");
  66 }
  67 
  68 void __init pq2_init_pci(void)
  69 {
  70         struct device_node *np;
  71 
  72         ppc_md.pci_exclude_device = pq2_pci_exclude_device;
  73 
  74         for_each_compatible_node(np, NULL, "fsl,pq2-pci")
  75                 pq2_pci_add_bridge(np);
  76 }
  77 #endif