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/mpic.h> 19 #include <asm/pci-bridge.h> 20 21 #include "mpc10x.h" 22 23 static const struct of_device_id of_bus_ids[] __initconst = { 24 { .type = "soc", }, 25 { .compatible = "simple-bus", }, 26 {}, 27 }; 28 29 static int __init declare_of_platform_devices(void) 30 { 31 of_platform_bus_probe(NULL, of_bus_ids, NULL); 32 return 0; 33 } 34 machine_device_initcall(linkstation, declare_of_platform_devices); 35 36 static int __init linkstation_add_bridge(struct device_node *dev) 37 { 38 #ifdef CONFIG_PCI 39 int len; 40 struct pci_controller *hose; 41 const int *bus_range; 42 43 printk("Adding PCI host bridge %pOF\n", dev); 44 45 bus_range = of_get_property(dev, "bus-range", &len); 46 if (bus_range == NULL || len < 2 * sizeof(int)) 47 printk(KERN_WARNING "Can't get bus-range for %pOF, assume" 48 " bus 0\n", dev); 49 50 hose = pcibios_alloc_controller(dev); 51 if (hose == NULL) 52 return -ENOMEM; 53 hose->first_busno = bus_range ? bus_range[0] : 0; 54 hose->last_busno = bus_range ? bus_range[1] : 0xff; 55 setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0); 56 57 /* Interpret the "ranges" property */ 58 /* This also maps the I/O region and sets isa_io/mem_base */ 59 pci_process_bridge_OF_ranges(hose, dev, 1); 60 #endif 61 return 0; 62 } 63 64 static void __init linkstation_setup_arch(void) 65 { 66 printk(KERN_INFO "BUFFALO Network Attached Storage Series\n"); 67 printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n"); 68 } 69 70 static void __init linkstation_setup_pci(void) 71 { 72 struct device_node *np; 73 74 /* Lookup PCI host bridges */ 75 for_each_compatible_node(np, "pci", "mpc10x-pci") 76 linkstation_add_bridge(np); 77 } 78 79 /* 80 * Interrupt setup and service. Interrupts on the linkstation come 81 * from the four PCI slots plus onboard 8241 devices: I2C, DUART. 82 */ 83 static void __init linkstation_init_IRQ(void) 84 { 85 struct mpic *mpic; 86 87 mpic = mpic_alloc(NULL, 0, 0, 4, 0, " EPIC "); 88 BUG_ON(mpic == NULL); 89 90 /* PCI IRQs */ 91 mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200); 92 93 /* I2C */ 94 mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000); 95 96 /* ttyS0, ttyS1 */ 97 mpic_assign_isu(mpic, 2, mpic->paddr + 0x11100); 98 99 mpic_init(mpic); 100 } 101 102 extern void avr_uart_configure(void); 103 extern void avr_uart_send(const char); 104 105 static void __noreturn linkstation_restart(char *cmd) 106 { 107 local_irq_disable(); 108 109 /* Reset system via AVR */ 110 avr_uart_configure(); 111 /* Send reboot command */ 112 avr_uart_send('C'); 113 114 for(;;) /* Spin until reset happens */ 115 avr_uart_send('G'); /* "kick" */ 116 } 117 118 static void __noreturn linkstation_power_off(void) 119 { 120 local_irq_disable(); 121 122 /* Power down system via AVR */ 123 avr_uart_configure(); 124 /* send shutdown command */ 125 avr_uart_send('E'); 126 127 for(;;) /* Spin until power-off happens */ 128 avr_uart_send('G'); /* "kick" */ 129 /* NOTREACHED */ 130 } 131 132 static void __noreturn linkstation_halt(void) 133 { 134 linkstation_power_off(); 135 /* NOTREACHED */ 136 } 137 138 static void linkstation_show_cpuinfo(struct seq_file *m) 139 { 140 seq_printf(m, "vendor\t\t: Buffalo Technology\n"); 141 seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n"); 142 } 143 144 static int __init linkstation_probe(void) 145 { 146 pm_power_off = linkstation_power_off; 147 148 return 1; 149 } 150 151 define_machine(linkstation){ 152 .name = "Buffalo Linkstation", 153 .compatible = "linkstation", 154 .probe = linkstation_probe, 155 .setup_arch = linkstation_setup_arch, 156 .discover_phbs = linkstation_setup_pci, 157 .init_IRQ = linkstation_init_IRQ, 158 .show_cpuinfo = linkstation_show_cpuinfo, 159 .get_irq = mpic_get_irq, 160 .restart = linkstation_restart, 161 .halt = linkstation_halt, 162 }; 163