release/src-rt-6.x.4708/linux/linux-2.6.36/arch/powerpc/platforms/embedded6xx/storcenter.c

   1 /*
   2  * Board setup routines for the storcenter
   3  *
   4  * Copyright 2007 (C) Oyvind Repvik (nail@nslu2-linux.org)
   5  * Copyright 2007 Andy Wilcox, Jon Loeliger
   6  *
   7  * Based on linkstation.c by G. Liakhovetski
   8  *
   9  * This file is licensed under the terms of the GNU General Public License
  10  * version 2.  This program is licensed "as is" without any warranty of
  11  * any kind, whether express or implied.
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/pci.h>
  16 #include <linux/initrd.h>
  17 #include <linux/of_platform.h>
  18
  19 #include <asm/system.h>
  20 #include <asm/time.h>
  21 #include <asm/prom.h>
  22 #include <asm/mpic.h>
  23 #include <asm/pci-bridge.h>
  24
  25 #include "mpc10x.h"
  26
  27
  28 static __initdata struct of_device_id storcenter_of_bus[] = {
  29         { .name = "soc", },
  30         {},
  31 };
  32
  33 static int __init storcenter_device_probe(void)
  34 {
  35         of_platform_bus_probe(NULL, storcenter_of_bus, NULL);
  36         return 0;
  37 }
  38 machine_device_initcall(storcenter, storcenter_device_probe);
  39
  40
  41 static int __init storcenter_add_bridge(struct device_node *dev)
  42 {
  43 #ifdef CONFIG_PCI
  44         int len;
  45         struct pci_controller *hose;
  46         const int *bus_range;
  47
  48         printk("Adding PCI host bridge %s\n", dev->full_name);
  49
  50         hose = pcibios_alloc_controller(dev);
  51         if (hose == NULL)
  52                 return -ENOMEM;
  53
  54         bus_range = of_get_property(dev, "bus-range", &len);
  55         hose->first_busno = bus_range ? bus_range[0] : 0;
  56         hose->last_busno = bus_range ? bus_range[1] : 0xff;
  57
  58         setup_indirect_pci(hose, MPC10X_MAPB_CNFG_ADDR, MPC10X_MAPB_CNFG_DATA, 0);
  59
  60         /* Interpret the "ranges" property */
  61         /* This also maps the I/O region and sets isa_io/mem_base */
  62         pci_process_bridge_OF_ranges(hose, dev, 1);
  63 #endif
  64
  65         return 0;
  66 }
  67
  68 static void __init storcenter_setup_arch(void)
  69 {
  70         struct device_node *np;
  71
  72         /* Lookup PCI host bridges */
  73         for_each_compatible_node(np, "pci", "mpc10x-pci")
  74                 storcenter_add_bridge(np);
  75
  76         printk(KERN_INFO "IOMEGA StorCenter\n");
  77 }
  78
  79 /*
  80  * Interrupt setup and service.  Interrrupts on the turbostation come
  81  * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
  82  */
  83 static void __init storcenter_init_IRQ(void)
  84 {
  85         struct mpic *mpic;
  86         struct device_node *dnp;
  87         const void *prop;
  88         int size;
  89         phys_addr_t paddr;
  90
  91         dnp = of_find_node_by_type(NULL, "open-pic");
  92         if (dnp == NULL)
  93                 return;
  94
  95         prop = of_get_property(dnp, "reg", &size);
  96         if (prop == NULL) {
  97                 of_node_put(dnp);
  98                 return;
  99         }
 100
 101         paddr = (phys_addr_t)of_translate_address(dnp, prop);
 102         mpic = mpic_alloc(dnp, paddr, MPIC_PRIMARY | MPIC_WANTS_RESET,
 103                         16, 32, " OpenPIC  ");
 104
 105         of_node_put(dnp);
 106
 107         BUG_ON(mpic == NULL);
 108
 109         /*
 110          * 16 Serial Interrupts followed by 16 Internal Interrupts.
 111          * I2C is the second internal, so it is at 17, 0x11020.
 112          */
 113         mpic_assign_isu(mpic, 0, paddr + 0x10200);
 114         mpic_assign_isu(mpic, 1, paddr + 0x11000);
 115
 116         mpic_init(mpic);
 117 }
 118
 119 static void storcenter_restart(char *cmd)
 120 {
 121         local_irq_disable();
 122
 123         /* Set exception prefix high - to the firmware */
 124         _nmask_and_or_msr(0, MSR_IP);
 125
 126         /* Wait for reset to happen */
 127         for (;;) ;
 128 }
 129
 130 static int __init storcenter_probe(void)
 131 {
 132         unsigned long root = of_get_flat_dt_root();
 133
 134         return of_flat_dt_is_compatible(root, "iomega,storcenter");
 135 }
 136
 137 define_machine(storcenter){
 138         .name                   = "IOMEGA StorCenter",
 139         .probe                  = storcenter_probe,
 140         .setup_arch             = storcenter_setup_arch,
 141         .init_IRQ               = storcenter_init_IRQ,
 142         .get_irq                = mpic_get_irq,
 143         .restart                = storcenter_restart,
 144         .calibrate_decr         = generic_calibrate_decr,
 145 };