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. Interrupts 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 87 mpic = mpic_alloc(NULL, 0, MPIC_WANTS_RESET, 88 16, 32, " OpenPIC "); 89 BUG_ON(mpic == NULL); 90 91 /* 92 * 16 Serial Interrupts followed by 16 Internal Interrupts. 93 * I2C is the second internal, so it is at 17, 0x11020. 94 */ 95 mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200); 96 mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000); 97 98 mpic_init(mpic); 99 } 100 101 static void storcenter_restart(char *cmd) 102 { 103 local_irq_disable(); 104 105 /* Set exception prefix high - to the firmware */ 106 _nmask_and_or_msr(0, MSR_IP); 107 108 /* Wait for reset to happen */ 109 for (;;) ; 110 } 111 112 static int __init storcenter_probe(void) 113 { 114 unsigned long root = of_get_flat_dt_root(); 115 116 return of_flat_dt_is_compatible(root, "iomega,storcenter"); 117 } 118 119 define_machine(storcenter){ 120 .name = "IOMEGA StorCenter", 121 .probe = storcenter_probe, 122 .setup_arch = storcenter_setup_arch, 123 .init_IRQ = storcenter_init_IRQ, 124 .get_irq = mpic_get_irq, 125 .restart = storcenter_restart, 126 .calibrate_decr = generic_calibrate_decr, 127 }; 128