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 struct device_node *dnp; 85 const u32 *prop; 86 int size; 87 phys_addr_t paddr; 88 89 dnp = of_find_node_by_type(NULL, "open-pic"); 90 if (dnp == NULL) 91 return; 92 93 prop = of_get_property(dnp, "reg", &size); 94 paddr = (phys_addr_t)of_translate_address(dnp, prop); 95 96 mpic = mpic_alloc(dnp, paddr, MPIC_PRIMARY | MPIC_WANTS_RESET, 4, 32, " EPIC "); 97 BUG_ON(mpic == NULL); 98 99 /* PCI IRQs */ 100 mpic_assign_isu(mpic, 0, paddr + 0x10200); 101 102 /* I2C */ 103 mpic_assign_isu(mpic, 1, paddr + 0x11000); 104 105 /* ttyS0, ttyS1 */ 106 mpic_assign_isu(mpic, 2, paddr + 0x11100); 107 108 mpic_init(mpic); 109 } 110 111 extern void avr_uart_configure(void); 112 extern void avr_uart_send(const char); 113 114 static void linkstation_restart(char *cmd) 115 { 116 local_irq_disable(); 117 118 /* Reset system via AVR */ 119 avr_uart_configure(); 120 /* Send reboot command */ 121 avr_uart_send('C'); 122 123 for(;;) /* Spin until reset happens */ 124 avr_uart_send('G'); /* "kick" */ 125 } 126 127 static void linkstation_power_off(void) 128 { 129 local_irq_disable(); 130 131 /* Power down system via AVR */ 132 avr_uart_configure(); 133 /* send shutdown command */ 134 avr_uart_send('E'); 135 136 for(;;) /* Spin until power-off happens */ 137 avr_uart_send('G'); /* "kick" */ 138 /* NOTREACHED */ 139 } 140 141 static void linkstation_halt(void) 142 { 143 linkstation_power_off(); 144 /* NOTREACHED */ 145 } 146 147 static void linkstation_show_cpuinfo(struct seq_file *m) 148 { 149 seq_printf(m, "vendor\t\t: Buffalo Technology\n"); 150 seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n"); 151 } 152 153 static int __init linkstation_probe(void) 154 { 155 unsigned long root; 156 157 root = of_get_flat_dt_root(); 158 159 if (!of_flat_dt_is_compatible(root, "linkstation")) 160 return 0; 161 return 1; 162 } 163 164 define_machine(linkstation){ 165 .name = "Buffalo Linkstation", 166 .probe = linkstation_probe, 167 .setup_arch = linkstation_setup_arch, 168 .init_IRQ = linkstation_init_IRQ, 169 .show_cpuinfo = linkstation_show_cpuinfo, 170 .get_irq = mpic_get_irq, 171 .restart = linkstation_restart, 172 .power_off = linkstation_power_off, 173 .halt = linkstation_halt, 174 .calibrate_decr = generic_calibrate_decr, 175 }; 176