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/pci.h> 15#include <linux/initrd.h> 16#include <linux/mtd/physmap.h> 17 18#include <asm/time.h> 19#include <asm/prom.h> 20#include <asm/mpic.h> 21#include <asm/mpc10x.h> 22#include <asm/pci-bridge.h> 23 24static struct mtd_partition linkstation_physmap_partitions[] = { 25 { 26 .name = "mtd_firmimg", 27 .offset = 0x000000, 28 .size = 0x300000, 29 }, 30 { 31 .name = "mtd_bootcode", 32 .offset = 0x300000, 33 .size = 0x070000, 34 }, 35 { 36 .name = "mtd_status", 37 .offset = 0x370000, 38 .size = 0x010000, 39 }, 40 { 41 .name = "mtd_conf", 42 .offset = 0x380000, 43 .size = 0x080000, 44 }, 45 { 46 .name = "mtd_allflash", 47 .offset = 0x000000, 48 .size = 0x400000, 49 }, 50 { 51 .name = "mtd_data", 52 .offset = 0x310000, 53 .size = 0x0f0000, 54 }, 55}; 56 57static int __init add_bridge(struct device_node *dev) 58{ 59 int len; 60 struct pci_controller *hose; 61 const int *bus_range; 62 63 printk("Adding PCI host bridge %s\n", dev->full_name); 64 65 bus_range = of_get_property(dev, "bus-range", &len); 66 if (bus_range == NULL || len < 2 * sizeof(int)) 67 printk(KERN_WARNING "Can't get bus-range for %s, assume" 68 " bus 0\n", dev->full_name); 69 70 hose = pcibios_alloc_controller(); 71 if (hose == NULL) 72 return -ENOMEM; 73 hose->first_busno = bus_range ? bus_range[0] : 0; 74 hose->last_busno = bus_range ? bus_range[1] : 0xff; 75 hose->arch_data = dev; 76 setup_indirect_pci(hose, 0xfec00000, 0xfee00000); 77 78 /* Interpret the "ranges" property */ 79 /* This also maps the I/O region and sets isa_io/mem_base */ 80 pci_process_bridge_OF_ranges(hose, dev, 1); 81 82 return 0; 83} 84 85static void __init linkstation_setup_arch(void) 86{ 87 struct device_node *np; 88#ifdef CONFIG_MTD_PHYSMAP 89 physmap_set_partitions(linkstation_physmap_partitions, 90 ARRAY_SIZE(linkstation_physmap_partitions)); 91#endif 92 93 /* Lookup PCI host bridges */ 94 for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;) 95 add_bridge(np); 96 97 printk(KERN_INFO "BUFFALO Network Attached Storage Series\n"); 98 printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n"); 99} 100 101/* 102 * Interrupt setup and service. Interrrupts on the linkstation come 103 * from the four PCI slots plus onboard 8241 devices: I2C, DUART. 104 */ 105static void __init linkstation_init_IRQ(void) 106{ 107 struct mpic *mpic; 108 struct device_node *dnp; 109 const u32 *prop; 110 int size; 111 phys_addr_t paddr; 112 113 dnp = of_find_node_by_type(NULL, "open-pic"); 114 if (dnp == NULL) 115 return; 116 117 prop = of_get_property(dnp, "reg", &size); 118 paddr = (phys_addr_t)of_translate_address(dnp, prop); 119 120 mpic = mpic_alloc(dnp, paddr, MPIC_PRIMARY | MPIC_WANTS_RESET, 4, 32, " EPIC "); 121 BUG_ON(mpic == NULL); 122 123 /* PCI IRQs */ 124 mpic_assign_isu(mpic, 0, paddr + 0x10200); 125 126 /* I2C */ 127 mpic_assign_isu(mpic, 1, paddr + 0x11000); 128 129 /* ttyS0, ttyS1 */ 130 mpic_assign_isu(mpic, 2, paddr + 0x11100); 131 132 mpic_init(mpic); 133} 134 135extern void avr_uart_configure(void); 136extern void avr_uart_send(const char); 137 138static void linkstation_restart(char *cmd) 139{ 140 local_irq_disable(); 141 142 /* Reset system via AVR */ 143 avr_uart_configure(); 144 /* Send reboot command */ 145 avr_uart_send('C'); 146 147 for(;;) /* Spin until reset happens */ 148 avr_uart_send('G'); /* "kick" */ 149} 150 151static void linkstation_power_off(void) 152{ 153 local_irq_disable(); 154 155 /* Power down system via AVR */ 156 avr_uart_configure(); 157 /* send shutdown command */ 158 avr_uart_send('E'); 159 160 for(;;) /* Spin until power-off happens */ 161 avr_uart_send('G'); /* "kick" */ 162 /* NOTREACHED */ 163} 164 165static void linkstation_halt(void) 166{ 167 linkstation_power_off(); 168 /* NOTREACHED */ 169} 170 171static void linkstation_show_cpuinfo(struct seq_file *m) 172{ 173 seq_printf(m, "vendor\t\t: Buffalo Technology\n"); 174 seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n"); 175} 176 177static int __init linkstation_probe(void) 178{ 179 unsigned long root; 180 181 root = of_get_flat_dt_root(); 182 183 if (!of_flat_dt_is_compatible(root, "linkstation")) 184 return 0; 185 return 1; 186} 187 188define_machine(linkstation){ 189 .name = "Buffalo Linkstation", 190 .probe = linkstation_probe, 191 .setup_arch = linkstation_setup_arch, 192 .init_IRQ = linkstation_init_IRQ, 193 .show_cpuinfo = linkstation_show_cpuinfo, 194 .get_irq = mpic_get_irq, 195 .restart = linkstation_restart, 196 .power_off = linkstation_power_off, 197 .halt = linkstation_halt, 198 .calibrate_decr = generic_calibrate_decr, 199}; 200