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/mpic.h> 21 #include <asm/pci-bridge.h> 22 23 #include "mpc10x.h" 24 25 26 static const struct of_device_id storcenter_of_bus[] __initconst = { 27 { .name = "soc", }, 28 {}, 29 }; 30 31 static int __init storcenter_device_probe(void) 32 { 33 of_platform_bus_probe(NULL, storcenter_of_bus, NULL); 34 return 0; 35 } 36 machine_device_initcall(storcenter, storcenter_device_probe); 37 38 39 static int __init storcenter_add_bridge(struct device_node *dev) 40 { 41 #ifdef CONFIG_PCI 42 int len; 43 struct pci_controller *hose; 44 const int *bus_range; 45 46 printk("Adding PCI host bridge %pOF\n", dev); 47 48 hose = pcibios_alloc_controller(dev); 49 if (hose == NULL) 50 return -ENOMEM; 51 52 bus_range = of_get_property(dev, "bus-range", &len); 53 hose->first_busno = bus_range ? bus_range[0] : 0; 54 hose->last_busno = bus_range ? bus_range[1] : 0xff; 55 56 setup_indirect_pci(hose, MPC10X_MAPB_CNFG_ADDR, MPC10X_MAPB_CNFG_DATA, 0); 57 58 /* Interpret the "ranges" property */ 59 /* This also maps the I/O region and sets isa_io/mem_base */ 60 pci_process_bridge_OF_ranges(hose, dev, 1); 61 #endif 62 63 return 0; 64 } 65 66 static void __init storcenter_setup_arch(void) 67 { 68 printk(KERN_INFO "IOMEGA StorCenter\n"); 69 } 70 71 static void __init storcenter_setup_pci(void) 72 { 73 struct device_node *np; 74 75 /* Lookup PCI host bridges */ 76 for_each_compatible_node(np, "pci", "mpc10x-pci") 77 storcenter_add_bridge(np); 78 } 79 80 /* 81 * Interrupt setup and service. Interrupts on the turbostation come 82 * from the four PCI slots plus onboard 8241 devices: I2C, DUART. 83 */ 84 static void __init storcenter_init_IRQ(void) 85 { 86 struct mpic *mpic; 87 88 mpic = mpic_alloc(NULL, 0, 0, 16, 0, " 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 __noreturn storcenter_restart(char *cmd) 102 { 103 local_irq_disable(); 104 105 /* Set exception prefix high - to the firmware */ 106 mtmsr(mfmsr() | MSR_IP); 107 isync(); 108 109 /* Wait for reset to happen */ 110 for (;;) ; 111 } 112 113 static int __init storcenter_probe(void) 114 { 115 return of_machine_is_compatible("iomega,storcenter"); 116 } 117 118 define_machine(storcenter){ 119 .name = "IOMEGA StorCenter", 120 .probe = storcenter_probe, 121 .setup_arch = storcenter_setup_arch, 122 .discover_phbs = storcenter_setup_pci, 123 .init_IRQ = storcenter_init_IRQ, 124 .get_irq = mpic_get_irq, 125 .restart = storcenter_restart, 126 .calibrate_decr = generic_calibrate_decr, 127 }; 128