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 28static __initdata struct of_device_id storcenter_of_bus[] = { 29 { .name = "soc", }, 30 {}, 31}; 32 33static int __init storcenter_device_probe(void) 34{ 35 of_platform_bus_probe(NULL, storcenter_of_bus, NULL); 36 return 0; 37} 38machine_device_initcall(storcenter, storcenter_device_probe); 39 40 41static 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 68static 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 */ 83static 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 119static 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 130static 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 137define_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}; 146