release/src-rt-6.x.4708/linux/linux-2.6.36/arch/powerpc/platforms/85xx/socrates.c

   1 /*
   2  * Copyright (c) 2008 Emcraft Systems
   3  * Sergei Poselenov <sposelenov@emcraft.com>
   4  *
   5  * Based on MPC8560 ADS and arch/ppc tqm85xx ports
   6  *
   7  * Maintained by Kumar Gala (see MAINTAINERS for contact information)
   8  *
   9  * Copyright 2008 Freescale Semiconductor Inc.
  10  *
  11  * Copyright (c) 2005-2006 DENX Software Engineering
  12  * Stefan Roese <sr@denx.de>
  13  *
  14  * Based on original work by
  15  *      Kumar Gala <kumar.gala@freescale.com>
  16  *      Copyright 2004 Freescale Semiconductor Inc.
  17  *
  18  * This program is free software; you can redistribute  it and/or modify it
  19  * under  the terms of  the GNU General  Public License as published by the
  20  * Free Software Foundation;  either version 2 of the  License, or (at your
  21  * option) any later version.
  22  */
  23
  24 #include <linux/stddef.h>
  25 #include <linux/kernel.h>
  26 #include <linux/pci.h>
  27 #include <linux/kdev_t.h>
  28 #include <linux/delay.h>
  29 #include <linux/seq_file.h>
  30 #include <linux/of_platform.h>
  31
  32 #include <asm/system.h>
  33 #include <asm/time.h>
  34 #include <asm/machdep.h>
  35 #include <asm/pci-bridge.h>
  36 #include <asm/mpic.h>
  37 #include <asm/prom.h>
  38 #include <mm/mmu_decl.h>
  39 #include <asm/udbg.h>
  40
  41 #include <sysdev/fsl_soc.h>
  42 #include <sysdev/fsl_pci.h>
  43
  44 #include "socrates_fpga_pic.h"
  45
  46 static void __init socrates_pic_init(void)
  47 {
  48         struct mpic *mpic;
  49         struct resource r;
  50         struct device_node *np;
  51
  52         np = of_find_node_by_type(NULL, "open-pic");
  53         if (!np) {
  54                 printk(KERN_ERR "Could not find open-pic node\n");
  55                 return;
  56         }
  57
  58         if (of_address_to_resource(np, 0, &r)) {
  59                 printk(KERN_ERR "Could not map mpic register space\n");
  60                 of_node_put(np);
  61                 return;
  62         }
  63
  64         mpic = mpic_alloc(np, r.start,
  65                         MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
  66                         0, 256, " OpenPIC  ");
  67         BUG_ON(mpic == NULL);
  68         of_node_put(np);
  69
  70         mpic_init(mpic);
  71
  72         np = of_find_compatible_node(NULL, NULL, "abb,socrates-fpga-pic");
  73         if (!np) {
  74                 printk(KERN_ERR "Could not find socrates-fpga-pic node\n");
  75                 return;
  76         }
  77         socrates_fpga_pic_init(np);
  78         of_node_put(np);
  79 }
  80
  81 /*
  82  * Setup the architecture
  83  */
  84 static void __init socrates_setup_arch(void)
  85 {
  86 #ifdef CONFIG_PCI
  87         struct device_node *np;
  88 #endif
  89
  90         if (ppc_md.progress)
  91                 ppc_md.progress("socrates_setup_arch()", 0);
  92
  93 #ifdef CONFIG_PCI
  94         for_each_compatible_node(np, "pci", "fsl,mpc8540-pci")
  95                 fsl_add_bridge(np, 1);
  96 #endif
  97 }
  98
  99 static struct of_device_id __initdata socrates_of_bus_ids[] = {
 100         { .compatible = "simple-bus", },
 101         { .compatible = "gianfar", },
 102         {},
 103 };
 104
 105 static int __init socrates_publish_devices(void)
 106 {
 107         return of_platform_bus_probe(NULL, socrates_of_bus_ids, NULL);
 108 }
 109 machine_device_initcall(socrates, socrates_publish_devices);
 110
 111 /*
 112  * Called very early, device-tree isn't unflattened
 113  */
 114 static int __init socrates_probe(void)
 115 {
 116         unsigned long root = of_get_flat_dt_root();
 117
 118         if (of_flat_dt_is_compatible(root, "abb,socrates"))
 119                 return 1;
 120
 121         return 0;
 122 }
 123
 124 define_machine(socrates) {
 125         .name                   = "Socrates",
 126         .probe                  = socrates_probe,
 127         .setup_arch             = socrates_setup_arch,
 128         .init_IRQ               = socrates_pic_init,
 129         .get_irq                = mpic_get_irq,
 130         .restart                = fsl_rstcr_restart,
 131         .calibrate_decr         = generic_calibrate_decr,
 132         .progress               = udbg_progress,
 133 };