Linux Kernel  3.7.1
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pq2.c
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1 /*
2  * Common PowerQUICC II code.
3  *
4  * Author: Scott Wood <[email protected]>
5  * Copyright (c) 2007 Freescale Semiconductor
6  *
7  * Based on code by Vitaly Bordug <[email protected]>
8  * pq2_restart fix by Wade Farnsworth <[email protected]>
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 
25 void pq2_restart(char *cmd)
26 {
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
38 static int pq2_pci_exclude_device(struct pci_controller *hose,
39  u_char bus, u8 devfn)
40 {
41  if (bus == 0 && PCI_SLOT(devfn) == 0)
43  else
44  return PCIBIOS_SUCCESSFUL;
45 }
46 
47 static 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 
68 err:
69  printk(KERN_ERR "No valid PCI reg property in device tree\n");
70 }
71 
72 void __init pq2_init_pci(void)
73 {
74  struct device_node *np = NULL;
75 
76  ppc_md.pci_exclude_device = pq2_pci_exclude_device;
77 
78  while ((np = of_find_compatible_node(np, NULL, "fsl,pq2-pci")))
79  pq2_pci_add_bridge(np);
80 }
81 #endif