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 const struct of_device_id of_bus_ids[] __initconst = { 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, 0, 4, 0, " EPIC "); 86 BUG_ON(mpic == NULL); 87 88 /* PCI IRQs */ 89 mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200); 90 91 /* I2C */ 92 mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000); 93 94 /* ttyS0, ttyS1 */ 95 mpic_assign_isu(mpic, 2, mpic->paddr + 0x11100); 96 97 mpic_init(mpic); 98 } 99 100 extern void avr_uart_configure(void); 101 extern void avr_uart_send(const char); 102 103 static void linkstation_restart(char *cmd) 104 { 105 local_irq_disable(); 106 107 /* Reset system via AVR */ 108 avr_uart_configure(); 109 /* Send reboot command */ 110 avr_uart_send('C'); 111 112 for(;;) /* Spin until reset happens */ 113 avr_uart_send('G'); /* "kick" */ 114 } 115 116 static void linkstation_power_off(void) 117 { 118 local_irq_disable(); 119 120 /* Power down system via AVR */ 121 avr_uart_configure(); 122 /* send shutdown command */ 123 avr_uart_send('E'); 124 125 for(;;) /* Spin until power-off happens */ 126 avr_uart_send('G'); /* "kick" */ 127 /* NOTREACHED */ 128 } 129 130 static void linkstation_halt(void) 131 { 132 linkstation_power_off(); 133 /* NOTREACHED */ 134 } 135 136 static void linkstation_show_cpuinfo(struct seq_file *m) 137 { 138 seq_printf(m, "vendor\t\t: Buffalo Technology\n"); 139 seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n"); 140 } 141 142 static int __init linkstation_probe(void) 143 { 144 unsigned long root; 145 146 root = of_get_flat_dt_root(); 147 148 if (!of_flat_dt_is_compatible(root, "linkstation")) 149 return 0; 150 151 pm_power_off = linkstation_power_off; 152 153 return 1; 154 } 155 156 define_machine(linkstation){ 157 .name = "Buffalo Linkstation", 158 .probe = linkstation_probe, 159 .setup_arch = linkstation_setup_arch, 160 .init_IRQ = linkstation_init_IRQ, 161 .show_cpuinfo = linkstation_show_cpuinfo, 162 .get_irq = mpic_get_irq, 163 .restart = linkstation_restart, 164 .halt = linkstation_halt, 165 .calibrate_decr = generic_calibrate_decr, 166 }; 167