167 lines
3.9 KiB
C
167 lines
3.9 KiB
C
/*
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* Board setup routines for the Buffalo Linkstation / Kurobox Platform.
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*
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* Copyright (C) 2006 G. Liakhovetski (g.liakhovetski@gmx.de)
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*
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* Based on sandpoint.c by Mark A. Greer
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of
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* any kind, whether express or implied.
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*/
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#include <linux/kernel.h>
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#include <linux/initrd.h>
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#include <linux/of_platform.h>
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#include <asm/time.h>
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#include <asm/prom.h>
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#include <asm/mpic.h>
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#include <asm/pci-bridge.h>
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#include "mpc10x.h"
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static const struct of_device_id of_bus_ids[] __initconst = {
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{ .type = "soc", },
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{ .compatible = "simple-bus", },
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{},
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};
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static int __init declare_of_platform_devices(void)
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{
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of_platform_bus_probe(NULL, of_bus_ids, NULL);
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return 0;
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}
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machine_device_initcall(linkstation, declare_of_platform_devices);
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static int __init linkstation_add_bridge(struct device_node *dev)
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{
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#ifdef CONFIG_PCI
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int len;
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struct pci_controller *hose;
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const int *bus_range;
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printk("Adding PCI host bridge %pOF\n", dev);
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bus_range = of_get_property(dev, "bus-range", &len);
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if (bus_range == NULL || len < 2 * sizeof(int))
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printk(KERN_WARNING "Can't get bus-range for %pOF, assume"
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" bus 0\n", dev);
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hose = pcibios_alloc_controller(dev);
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if (hose == NULL)
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return -ENOMEM;
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hose->first_busno = bus_range ? bus_range[0] : 0;
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hose->last_busno = bus_range ? bus_range[1] : 0xff;
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setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0);
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/* Interpret the "ranges" property */
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/* This also maps the I/O region and sets isa_io/mem_base */
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pci_process_bridge_OF_ranges(hose, dev, 1);
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#endif
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return 0;
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}
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static void __init linkstation_setup_arch(void)
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{
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printk(KERN_INFO "BUFFALO Network Attached Storage Series\n");
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printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n");
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}
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static void __init linkstation_setup_pci(void)
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{
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struct device_node *np;
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/* Lookup PCI host bridges */
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for_each_compatible_node(np, "pci", "mpc10x-pci")
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linkstation_add_bridge(np);
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}
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/*
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* Interrupt setup and service. Interrupts on the linkstation come
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* from the four PCI slots plus onboard 8241 devices: I2C, DUART.
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*/
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static void __init linkstation_init_IRQ(void)
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{
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struct mpic *mpic;
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mpic = mpic_alloc(NULL, 0, 0, 4, 0, " EPIC ");
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BUG_ON(mpic == NULL);
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/* PCI IRQs */
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mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200);
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/* I2C */
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mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000);
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/* ttyS0, ttyS1 */
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mpic_assign_isu(mpic, 2, mpic->paddr + 0x11100);
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mpic_init(mpic);
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}
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extern void avr_uart_configure(void);
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extern void avr_uart_send(const char);
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static void __noreturn linkstation_restart(char *cmd)
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{
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local_irq_disable();
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/* Reset system via AVR */
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avr_uart_configure();
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/* Send reboot command */
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avr_uart_send('C');
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for(;;) /* Spin until reset happens */
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avr_uart_send('G'); /* "kick" */
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}
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static void __noreturn linkstation_power_off(void)
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{
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local_irq_disable();
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/* Power down system via AVR */
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avr_uart_configure();
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/* send shutdown command */
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avr_uart_send('E');
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for(;;) /* Spin until power-off happens */
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avr_uart_send('G'); /* "kick" */
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/* NOTREACHED */
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}
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static void __noreturn linkstation_halt(void)
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{
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linkstation_power_off();
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/* NOTREACHED */
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}
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static void linkstation_show_cpuinfo(struct seq_file *m)
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{
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seq_printf(m, "vendor\t\t: Buffalo Technology\n");
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seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n");
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}
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static int __init linkstation_probe(void)
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{
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if (!of_machine_is_compatible("linkstation"))
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return 0;
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pm_power_off = linkstation_power_off;
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return 1;
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}
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define_machine(linkstation){
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.name = "Buffalo Linkstation",
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.probe = linkstation_probe,
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.setup_arch = linkstation_setup_arch,
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.discover_phbs = linkstation_setup_pci,
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.init_IRQ = linkstation_init_IRQ,
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.show_cpuinfo = linkstation_show_cpuinfo,
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.get_irq = mpic_get_irq,
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.restart = linkstation_restart,
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.halt = linkstation_halt,
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.calibrate_decr = generic_calibrate_decr,
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};
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