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/mtd/physmap.h>
  18 #include <linux/of_platform.h>
  19
  20 #include <asm/system.h>
  21 #include <asm/time.h>
  22 #include <asm/prom.h>
  23 #include <asm/mpic.h>
  24 #include <asm/pci-bridge.h>
  25
  26 #include "mpc10x.h"
  27
  28
  29 #ifdef CONFIG_MTD_PHYSMAP
  30 static struct mtd_partition storcenter_physmap_partitions[] = {
  31         {
  32                 .name   = "kernel",
  33                 .offset = 0x000000,
  34                 .size   = 0x170000,
  35         },
  36         {
  37                 .name   = "rootfs",
  38                 .offset = 0x170000,
  39                 .size   = 0x590000,
  40         },
  41         {
  42                 .name   = "uboot",
  43                 .offset = 0x700000,
  44                 .size   = 0x040000,
  45         },
  46         {
  47                 .name   = "config",
  48                 .offset = 0x740000,
  49                 .size   = 0x0c0000,
  50         },
  51 };
  52 #endif
  53
  54
  55 static __initdata struct of_device_id storcenter_of_bus[] = {
  56         { .name = "soc", },
  57         {},
  58 };
  59
  60 static int __init storcenter_device_probe(void)
  61 {
  62         of_platform_bus_probe(NULL, storcenter_of_bus, NULL);
  63         return 0;
  64 }
  65 machine_device_initcall(storcenter, storcenter_device_probe);
  66
  67
  68 static int __init storcenter_add_bridge(struct device_node *dev)
  69 {
  70 #ifdef CONFIG_PCI
  71         int len;
  72         struct pci_controller *hose;
  73         const int *bus_range;
  74
  75         printk("Adding PCI host bridge %s\n", dev->full_name);
  76
  77         hose = pcibios_alloc_controller(dev);
  78         if (hose == NULL)
  79                 return -ENOMEM;
  80
  81         bus_range = of_get_property(dev, "bus-range", &len);
  82         hose->first_busno = bus_range ? bus_range[0] : 0;
  83         hose->last_busno = bus_range ? bus_range[1] : 0xff;
  84
  85         setup_indirect_pci(hose, MPC10X_MAPB_CNFG_ADDR, MPC10X_MAPB_CNFG_DATA, 0);
  86
  87         /* Interpret the "ranges" property */
  88         /* This also maps the I/O region and sets isa_io/mem_base */
  89         pci_process_bridge_OF_ranges(hose, dev, 1);
  90 #endif
  91
  92         return 0;
  93 }
  94
  95 static void __init storcenter_setup_arch(void)
  96 {
  97         struct device_node *np;
  98
  99 #ifdef CONFIG_MTD_PHYSMAP
 100         physmap_set_partitions(storcenter_physmap_partitions,
 101                                ARRAY_SIZE(storcenter_physmap_partitions));
 102 #endif
 103
 104         /* Lookup PCI host bridges */
 105         for_each_compatible_node(np, "pci", "mpc10x-pci")
 106                 storcenter_add_bridge(np);
 107
 108         printk(KERN_INFO "IOMEGA StorCenter\n");
 109 }
 110
 111 /*
 112  * Interrupt setup and service.  Interrrupts on the turbostation come
 113  * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
 114  */
 115 static void __init storcenter_init_IRQ(void)
 116 {
 117         struct mpic *mpic;
 118         struct device_node *dnp;
 119         const void *prop;
 120         int size;
 121         phys_addr_t paddr;
 122
 123         dnp = of_find_node_by_type(NULL, "open-pic");
 124         if (dnp == NULL)
 125                 return;
 126
 127         prop = of_get_property(dnp, "reg", &size);
 128         if (prop == NULL) {
 129                 of_node_put(dnp);
 130                 return;
 131         }
 132
 133         paddr = (phys_addr_t)of_translate_address(dnp, prop);
 134         mpic = mpic_alloc(dnp, paddr, MPIC_PRIMARY | MPIC_WANTS_RESET,
 135                         16, 32, " OpenPIC  ");
 136
 137         of_node_put(dnp);
 138
 139         BUG_ON(mpic == NULL);
 140
 141         /*
 142          * 16 Serial Interrupts followed by 16 Internal Interrupts.
 143          * I2C is the second internal, so it is at 17, 0x11020.
 144          */
 145         mpic_assign_isu(mpic, 0, paddr + 0x10200);
 146         mpic_assign_isu(mpic, 1, paddr + 0x11000);
 147
 148         mpic_init(mpic);
 149 }
 150
 151 static void storcenter_restart(char *cmd)
 152 {
 153         local_irq_disable();
 154
 155         /* Set exception prefix high - to the firmware */
 156         _nmask_and_or_msr(0, MSR_IP);
 157
 158         /* Wait for reset to happen */
 159         for (;;) ;
 160 }
 161
 162 static int __init storcenter_probe(void)
 163 {
 164         unsigned long root = of_get_flat_dt_root();
 165
 166         return of_flat_dt_is_compatible(root, "iomega,storcenter");
 167 }
 168
 169 define_machine(storcenter){
 170         .name                   = "IOMEGA StorCenter",
 171         .probe                  = storcenter_probe,
 172         .setup_arch             = storcenter_setup_arch,
 173         .init_IRQ               = storcenter_init_IRQ,
 174         .get_irq                = mpic_get_irq,
 175         .restart                = storcenter_restart,
 176         .calibrate_decr         = generic_calibrate_decr,
 177 };