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Linux/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/time.h>
 20 #include <asm/prom.h>
 21 #include <asm/mpic.h>
 22 #include <asm/pci-bridge.h>
 23 
 24 #include "mpc10x.h"
 25 
 26 
 27 static __initdata struct of_device_id storcenter_of_bus[] = {
 28         { .name = "soc", },
 29         {},
 30 };
 31 
 32 static int __init storcenter_device_probe(void)
 33 {
 34         of_platform_bus_probe(NULL, storcenter_of_bus, NULL);
 35         return 0;
 36 }
 37 machine_device_initcall(storcenter, storcenter_device_probe);
 38 
 39 
 40 static int __init storcenter_add_bridge(struct device_node *dev)
 41 {
 42 #ifdef CONFIG_PCI
 43         int len;
 44         struct pci_controller *hose;
 45         const int *bus_range;
 46 
 47         printk("Adding PCI host bridge %s\n", dev->full_name);
 48 
 49         hose = pcibios_alloc_controller(dev);
 50         if (hose == NULL)
 51                 return -ENOMEM;
 52 
 53         bus_range = of_get_property(dev, "bus-range", &len);
 54         hose->first_busno = bus_range ? bus_range[0] : 0;
 55         hose->last_busno = bus_range ? bus_range[1] : 0xff;
 56 
 57         setup_indirect_pci(hose, MPC10X_MAPB_CNFG_ADDR, MPC10X_MAPB_CNFG_DATA, 0);
 58 
 59         /* Interpret the "ranges" property */
 60         /* This also maps the I/O region and sets isa_io/mem_base */
 61         pci_process_bridge_OF_ranges(hose, dev, 1);
 62 #endif
 63 
 64         return 0;
 65 }
 66 
 67 static void __init storcenter_setup_arch(void)
 68 {
 69         struct device_node *np;
 70 
 71         /* Lookup PCI host bridges */
 72         for_each_compatible_node(np, "pci", "mpc10x-pci")
 73                 storcenter_add_bridge(np);
 74 
 75         printk(KERN_INFO "IOMEGA StorCenter\n");
 76 }
 77 
 78 /*
 79  * Interrupt setup and service.  Interrupts on the turbostation come
 80  * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
 81  */
 82 static void __init storcenter_init_IRQ(void)
 83 {
 84         struct mpic *mpic;
 85 
 86         mpic = mpic_alloc(NULL, 0, 0, 16, 0, " OpenPIC  ");
 87         BUG_ON(mpic == NULL);
 88 
 89         /*
 90          * 16 Serial Interrupts followed by 16 Internal Interrupts.
 91          * I2C is the second internal, so it is at 17, 0x11020.
 92          */
 93         mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200);
 94         mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000);
 95 
 96         mpic_init(mpic);
 97 }
 98 
 99 static void storcenter_restart(char *cmd)
100 {
101         local_irq_disable();
102 
103         /* Set exception prefix high - to the firmware */
104         _nmask_and_or_msr(0, MSR_IP);
105 
106         /* Wait for reset to happen */
107         for (;;) ;
108 }
109 
110 static int __init storcenter_probe(void)
111 {
112         unsigned long root = of_get_flat_dt_root();
113 
114         return of_flat_dt_is_compatible(root, "iomega,storcenter");
115 }
116 
117 define_machine(storcenter){
118         .name                   = "IOMEGA StorCenter",
119         .probe                  = storcenter_probe,
120         .setup_arch             = storcenter_setup_arch,
121         .init_IRQ               = storcenter_init_IRQ,
122         .get_irq                = mpic_get_irq,
123         .restart                = storcenter_restart,
124         .calibrate_decr         = generic_calibrate_decr,
125 };
126 

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