release/src-rt-6.x.4708/linux/linux-2.6.36/arch/powerpc/platforms/40x/ppc40x_simple.c

   1 /*
   2  * Generic PowerPC 40x platform support
   3  *
   4  * Copyright 2008 IBM Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; version 2 of the License.
   9  *
  10  * This implements simple platform support for PowerPC 44x chips.  This is
  11  * mostly used for eval boards or other simple and "generic" 44x boards.  If
  12  * your board has custom functions or hardware, then you will likely want to
  13  * implement your own board.c file to accommodate it.
  14  */
  15
  16 #include <asm/machdep.h>
  17 #include <asm/pci-bridge.h>
  18 #include <asm/ppc4xx.h>
  19 #include <asm/prom.h>
  20 #include <asm/time.h>
  21 #include <asm/udbg.h>
  22 #include <asm/uic.h>
  23
  24 #include <linux/init.h>
  25 #include <linux/of_platform.h>
  26
  27 static __initdata struct of_device_id ppc40x_of_bus[] = {
  28         { .compatible = "ibm,plb3", },
  29         { .compatible = "ibm,plb4", },
  30         { .compatible = "ibm,opb", },
  31         { .compatible = "ibm,ebc", },
  32         { .compatible = "simple-bus", },
  33         {},
  34 };
  35
  36 static int __init ppc40x_device_probe(void)
  37 {
  38         of_platform_bus_probe(NULL, ppc40x_of_bus, NULL);
  39
  40         return 0;
  41 }
  42 machine_device_initcall(ppc40x_simple, ppc40x_device_probe);
  43
  44 /* This is the list of boards that can be supported by this simple
  45  * platform code.  This does _not_ mean the boards are compatible,
  46  * as they most certainly are not from a device tree perspective.
  47  * However, their differences are handled by the device tree and the
  48  * drivers and therefore they don't need custom board support files.
  49  *
  50  * Again, if your board needs to do things differently then create a
  51  * board.c file for it rather than adding it to this list.
  52  */
  53 static char *board[] __initdata = {
  54         "amcc,acadia",
  55         "amcc,haleakala",
  56         "amcc,kilauea",
  57         "amcc,makalu",
  58         "est,hotfoot"
  59 };
  60
  61 static int __init ppc40x_probe(void)
  62 {
  63         unsigned long root = of_get_flat_dt_root();
  64         int i = 0;
  65
  66         for (i = 0; i < ARRAY_SIZE(board); i++) {
  67                 if (of_flat_dt_is_compatible(root, board[i])) {
  68                         ppc_pci_set_flags(PPC_PCI_REASSIGN_ALL_RSRC);
  69                         return 1;
  70                 }
  71         }
  72
  73         return 0;
  74 }
  75
  76 define_machine(ppc40x_simple) {
  77         .name = "PowerPC 40x Platform",
  78         .probe = ppc40x_probe,
  79         .progress = udbg_progress,
  80         .init_IRQ = uic_init_tree,
  81         .get_irq = uic_get_irq,
  82         .restart = ppc4xx_reset_system,
  83         .calibrate_decr = generic_calibrate_decr,
  84 };