LXR linux/arch/powerpc/platforms/embedded6xx/linkstation.c

   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
  24static __initdata struct of_device_id of_bus_ids[] = {
  25        { .type = "soc", },
  26        { .compatible = "simple-bus", },
  27        {},
  28};
  29
  30static int __init declare_of_platform_devices(void)
  31{
  32        of_platform_bus_probe(NULL, of_bus_ids, NULL);
  33        return 0;
  34}
  35machine_device_initcall(linkstation, declare_of_platform_devices);
  36
  37static 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
  65static 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 */
  81static 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
 111extern void avr_uart_configure(void);
 112extern void avr_uart_send(const char);
 113
 114static 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
 127static 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
 141static void linkstation_halt(void)
 142{
 143        linkstation_power_off();
 144        /* NOTREACHED */
 145}
 146
 147static 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
 153static 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
 164define_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