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/mtd/physmap.h> 16 #include <linux/of_platform.h> 17 18 #include <asm/time.h> 19 #include <asm/prom.h> 20 #include <asm/mpic.h> 21 #include <asm/pci-bridge.h> 22 23 #include "mpc10x.h" 24 25 static struct mtd_partition linkstation_physmap_partitions[] = { 26 { 27 .name = "mtd_firmimg", 28 .offset = 0x000000, 29 .size = 0x300000, 30 }, 31 { 32 .name = "mtd_bootcode", 33 .offset = 0x300000, 34 .size = 0x070000, 35 }, 36 { 37 .name = "mtd_status", 38 .offset = 0x370000, 39 .size = 0x010000, 40 }, 41 { 42 .name = "mtd_conf", 43 .offset = 0x380000, 44 .size = 0x080000, 45 }, 46 { 47 .name = "mtd_allflash", 48 .offset = 0x000000, 49 .size = 0x400000, 50 }, 51 { 52 .name = "mtd_data", 53 .offset = 0x310000, 54 .size = 0x0f0000, 55 }, 56 }; 57 58 static __initdata struct of_device_id of_bus_ids[] = { 59 { .type = "soc", }, 60 { .compatible = "simple-bus", }, 61 {}, 62 }; 63 64 static int __init declare_of_platform_devices(void) 65 { 66 of_platform_bus_probe(NULL, of_bus_ids, NULL); 67 return 0; 68 } 69 machine_device_initcall(linkstation, declare_of_platform_devices); 70 71 static int __init linkstation_add_bridge(struct device_node *dev) 72 { 73 #ifdef CONFIG_PCI 74 int len; 75 struct pci_controller *hose; 76 const int *bus_range; 77 78 printk("Adding PCI host bridge %s\n", dev->full_name); 79 80 bus_range = of_get_property(dev, "bus-range", &len); 81 if (bus_range == NULL || len < 2 * sizeof(int)) 82 printk(KERN_WARNING "Can't get bus-range for %s, assume" 83 " bus 0\n", dev->full_name); 84 85 hose = pcibios_alloc_controller(dev); 86 if (hose == NULL) 87 return -ENOMEM; 88 hose->first_busno = bus_range ? bus_range[0] : 0; 89 hose->last_busno = bus_range ? bus_range[1] : 0xff; 90 setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0); 91 92 /* Interpret the "ranges" property */ 93 /* This also maps the I/O region and sets isa_io/mem_base */ 94 pci_process_bridge_OF_ranges(hose, dev, 1); 95 #endif 96 return 0; 97 } 98 99 static void __init linkstation_setup_arch(void) 100 { 101 struct device_node *np; 102 #ifdef CONFIG_MTD_PHYSMAP 103 physmap_set_partitions(linkstation_physmap_partitions, 104 ARRAY_SIZE(linkstation_physmap_partitions)); 105 #endif 106 107 /* Lookup PCI host bridges */ 108 for_each_compatible_node(np, "pci", "mpc10x-pci") 109 linkstation_add_bridge(np); 110 111 printk(KERN_INFO "BUFFALO Network Attached Storage Series\n"); 112 printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n"); 113 } 114 115 /* 116 * Interrupt setup and service. Interrupts on the linkstation come 117 * from the four PCI slots plus onboard 8241 devices: I2C, DUART. 118 */ 119 static void __init linkstation_init_IRQ(void) 120 { 121 struct mpic *mpic; 122 struct device_node *dnp; 123 const u32 *prop; 124 int size; 125 phys_addr_t paddr; 126 127 dnp = of_find_node_by_type(NULL, "open-pic"); 128 if (dnp == NULL) 129 return; 130 131 prop = of_get_property(dnp, "reg", &size); 132 paddr = (phys_addr_t)of_translate_address(dnp, prop); 133 134 mpic = mpic_alloc(dnp, paddr, MPIC_PRIMARY | MPIC_WANTS_RESET, 4, 32, " EPIC "); 135 BUG_ON(mpic == NULL); 136 137 /* PCI IRQs */ 138 mpic_assign_isu(mpic, 0, paddr + 0x10200); 139 140 /* I2C */ 141 mpic_assign_isu(mpic, 1, paddr + 0x11000); 142 143 /* ttyS0, ttyS1 */ 144 mpic_assign_isu(mpic, 2, paddr + 0x11100); 145 146 mpic_init(mpic); 147 } 148 149 extern void avr_uart_configure(void); 150 extern void avr_uart_send(const char); 151 152 static void linkstation_restart(char *cmd) 153 { 154 local_irq_disable(); 155 156 /* Reset system via AVR */ 157 avr_uart_configure(); 158 /* Send reboot command */ 159 avr_uart_send('C'); 160 161 for(;;) /* Spin until reset happens */ 162 avr_uart_send('G'); /* "kick" */ 163 } 164 165 static void linkstation_power_off(void) 166 { 167 local_irq_disable(); 168 169 /* Power down system via AVR */ 170 avr_uart_configure(); 171 /* send shutdown command */ 172 avr_uart_send('E'); 173 174 for(;;) /* Spin until power-off happens */ 175 avr_uart_send('G'); /* "kick" */ 176 /* NOTREACHED */ 177 } 178 179 static void linkstation_halt(void) 180 { 181 linkstation_power_off(); 182 /* NOTREACHED */ 183 } 184 185 static void linkstation_show_cpuinfo(struct seq_file *m) 186 { 187 seq_printf(m, "vendor\t\t: Buffalo Technology\n"); 188 seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n"); 189 } 190 191 static int __init linkstation_probe(void) 192 { 193 unsigned long root; 194 195 root = of_get_flat_dt_root(); 196 197 if (!of_flat_dt_is_compatible(root, "linkstation")) 198 return 0; 199 return 1; 200 } 201 202 define_machine(linkstation){ 203 .name = "Buffalo Linkstation", 204 .probe = linkstation_probe, 205 .setup_arch = linkstation_setup_arch, 206 .init_IRQ = linkstation_init_IRQ, 207 .show_cpuinfo = linkstation_show_cpuinfo, 208 .get_irq = mpic_get_irq, 209 .restart = linkstation_restart, 210 .power_off = linkstation_power_off, 211 .halt = linkstation_halt, 212 .calibrate_decr = generic_calibrate_decr, 213 }; 214