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 const struct of_device_id storcenter_of_bus[] __initconst = { 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 %pOF\n", dev); 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 __noreturn 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 return of_machine_is_compatible("iomega,storcenter"); 113 } 114 115 define_machine(storcenter){ 116 .name = "IOMEGA StorCenter", 117 .probe = storcenter_probe, 118 .setup_arch = storcenter_setup_arch, 119 .init_IRQ = storcenter_init_IRQ, 120 .get_irq = mpic_get_irq, 121 .restart = storcenter_restart, 122 .calibrate_decr = generic_calibrate_decr, 123 }; 124