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 const struct of_device_id of_bus_ids[] __initconst = {
  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 %pOF\n", dev);
  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 %pOF, assume"
  49                                " bus 0\n", dev);
  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        printk(KERN_INFO "BUFFALO Network Attached Storage Series\n");
  68        printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n");
  69}
  70
  71static void __init linkstation_setup_pci(void)
  72{
  73        struct device_node *np;
  74
  75        /* Lookup PCI host bridges */
  76        for_each_compatible_node(np, "pci", "mpc10x-pci")
  77                linkstation_add_bridge(np);
  78}
  79
  80/*
  81 * Interrupt setup and service.  Interrupts on the linkstation come
  82 * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
  83 */
  84static void __init linkstation_init_IRQ(void)
  85{
  86        struct mpic *mpic;
  87
  88        mpic = mpic_alloc(NULL, 0, 0, 4, 0, " EPIC     ");
  89        BUG_ON(mpic == NULL);
  90
  91        /* PCI IRQs */
  92        mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200);
  93
  94        /* I2C */
  95        mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000);
  96
  97        /* ttyS0, ttyS1 */
  98        mpic_assign_isu(mpic, 2, mpic->paddr + 0x11100);
  99
 100        mpic_init(mpic);
 101}
 102
 103extern void avr_uart_configure(void);
 104extern void avr_uart_send(const char);
 105
 106static void __noreturn linkstation_restart(char *cmd)
 107{
 108        local_irq_disable();
 109
 110        /* Reset system via AVR */
 111        avr_uart_configure();
 112        /* Send reboot command */
 113        avr_uart_send('C');
 114
 115        for(;;)  /* Spin until reset happens */
 116                avr_uart_send('G');     /* "kick" */
 117}
 118
 119static void __noreturn linkstation_power_off(void)
 120{
 121        local_irq_disable();
 122
 123        /* Power down system via AVR */
 124        avr_uart_configure();
 125        /* send shutdown command */
 126        avr_uart_send('E');
 127
 128        for(;;)  /* Spin until power-off happens */
 129                avr_uart_send('G');     /* "kick" */
 130        /* NOTREACHED */
 131}
 132
 133static void __noreturn linkstation_halt(void)
 134{
 135        linkstation_power_off();
 136        /* NOTREACHED */
 137}
 138
 139static void linkstation_show_cpuinfo(struct seq_file *m)
 140{
 141        seq_printf(m, "vendor\t\t: Buffalo Technology\n");
 142        seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n");
 143}
 144
 145static int __init linkstation_probe(void)
 146{
 147        if (!of_machine_is_compatible("linkstation"))
 148                return 0;
 149
 150        pm_power_off = linkstation_power_off;
 151
 152        return 1;
 153}
 154
 155define_machine(linkstation){
 156        .name                   = "Buffalo Linkstation",
 157        .probe                  = linkstation_probe,
 158        .setup_arch             = linkstation_setup_arch,
 159        .discover_phbs          = linkstation_setup_pci,
 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