1 /* 2 * Board setup routines for the Buffalo Linkstation / Kurobox Platform. 3 * 4 * Copyright (C) 2006 G. Liakhovetski (g.liakhovetski@gmx.de) 5 * 6 * Based on sandpoint.c by Mark A. Greer 7 * 8 * This file is licensed under the terms of the GNU General Public License 9 * version 2. This program is licensed "as is" without any warranty of 10 * any kind, whether express or implied. 11 */ 12 13 #include <linux/kernel.h> 14 #include <linux/initrd.h> 15 #include <linux/of_platform.h> 16 17 #include <asm/time.h> 18 #include <asm/prom.h> 19 #include <asm/mpic.h> 20 #include <asm/pci-bridge.h> 21 22 #include "mpc10x.h" 23 24 static __initdata struct of_device_id of_bus_ids[] = { 25 { .type = "soc", }, 26 { .compatible = "simple-bus", }, 27 {}, 28 }; 29 30 static int __init declare_of_platform_devices(void) 31 { 32 of_platform_bus_probe(NULL, of_bus_ids, NULL); 33 return 0; 34 } 35 machine_device_initcall(linkstation, declare_of_platform_devices); 36 37 static int __init linkstation_add_bridge(struct device_node *dev) 38 { 39 #ifdef CONFIG_PCI 40 int len; 41 struct pci_controller *hose; 42 const int *bus_range; 43 44 printk("Adding PCI host bridge %s\n", dev->full_name); 45 46 bus_range = of_get_property(dev, "bus-range", &len); 47 if (bus_range == NULL || len < 2 * sizeof(int)) 48 printk(KERN_WARNING "Can't get bus-range for %s, assume" 49 " bus 0\n", dev->full_name); 50 51 hose = pcibios_alloc_controller(dev); 52 if (hose == NULL) 53 return -ENOMEM; 54 hose->first_busno = bus_range ? bus_range[0] : 0; 55 hose->last_busno = bus_range ? bus_range[1] : 0xff; 56 setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 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 return 0; 63 } 64 65 static void __init linkstation_setup_arch(void) 66 { 67 struct device_node *np; 68 69 /* Lookup PCI host bridges */ 70 for_each_compatible_node(np, "pci", "mpc10x-pci") 71 linkstation_add_bridge(np); 72 73 printk(KERN_INFO "BUFFALO Network Attached Storage Series\n"); 74 printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n"); 75 } 76 77 /* 78 * Interrupt setup and service. Interrupts on the linkstation come 79 * from the four PCI slots plus onboard 8241 devices: I2C, DUART. 80 */ 81 static void __init linkstation_init_IRQ(void) 82 { 83 struct mpic *mpic; 84 85 mpic = mpic_alloc(NULL, 0, MPIC_WANTS_RESET, 86 4, 32, " EPIC "); 87 BUG_ON(mpic == NULL); 88 89 /* PCI IRQs */ 90 mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200); 91 92 /* I2C */ 93 mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000); 94 95 /* ttyS0, ttyS1 */ 96 mpic_assign_isu(mpic, 2, mpic->paddr + 0x11100); 97 98 mpic_init(mpic); 99 } 100 101 extern void avr_uart_configure(void); 102 extern void avr_uart_send(const char); 103 104 static void linkstation_restart(char *cmd) 105 { 106 local_irq_disable(); 107 108 /* Reset system via AVR */ 109 avr_uart_configure(); 110 /* Send reboot command */ 111 avr_uart_send('C'); 112 113 for(;;) /* Spin until reset happens */ 114 avr_uart_send('G'); /* "kick" */ 115 } 116 117 static void linkstation_power_off(void) 118 { 119 local_irq_disable(); 120 121 /* Power down system via AVR */ 122 avr_uart_configure(); 123 /* send shutdown command */ 124 avr_uart_send('E'); 125 126 for(;;) /* Spin until power-off happens */ 127 avr_uart_send('G'); /* "kick" */ 128 /* NOTREACHED */ 129 } 130 131 static void linkstation_halt(void) 132 { 133 linkstation_power_off(); 134 /* NOTREACHED */ 135 } 136 137 static void linkstation_show_cpuinfo(struct seq_file *m) 138 { 139 seq_printf(m, "vendor\t\t: Buffalo Technology\n"); 140 seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n"); 141 } 142 143 static int __init linkstation_probe(void) 144 { 145 unsigned long root; 146 147 root = of_get_flat_dt_root(); 148 149 if (!of_flat_dt_is_compatible(root, "linkstation")) 150 return 0; 151 return 1; 152 } 153 154 define_machine(linkstation){ 155 .name = "Buffalo Linkstation", 156 .probe = linkstation_probe, 157 .setup_arch = linkstation_setup_arch, 158 .init_IRQ = linkstation_init_IRQ, 159 .show_cpuinfo = linkstation_show_cpuinfo, 160 .get_irq = mpic_get_irq, 161 .restart = linkstation_restart, 162 .power_off = linkstation_power_off, 163 .halt = linkstation_halt, 164 .calibrate_decr = generic_calibrate_decr, 165 }; 166