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#include <linux/seq_file.h>
 17
 18#include <asm/time.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
103static void __noreturn linkstation_restart(char *cmd)
104{
105	local_irq_disable();
106
107	/* Reset system via AVR */
108	avr_uart_configure();
109	/* Send reboot command */
110	avr_uart_send('C');
111
112	for(;;)  /* Spin until reset happens */
113		avr_uart_send('G');	/* "kick" */
114}
115
116static void __noreturn linkstation_power_off(void)
117{
118	local_irq_disable();
119
120	/* Power down system via AVR */
121	avr_uart_configure();
122	/* send shutdown command */
123	avr_uart_send('E');
124
125	for(;;)  /* Spin until power-off happens */
126		avr_uart_send('G');	/* "kick" */
127	/* NOTREACHED */
128}
129
130static void __noreturn linkstation_halt(void)
131{
132	linkstation_power_off();
133	/* NOTREACHED */
134}
135
136static void linkstation_show_cpuinfo(struct seq_file *m)
137{
138	seq_printf(m, "vendor\t\t: Buffalo Technology\n");
139	seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n");
140}
141
142static int __init linkstation_probe(void)
143{
144	pm_power_off = linkstation_power_off;
145
146	return 1;
147}
148
149define_machine(linkstation){
150	.name 			= "Buffalo Linkstation",
151	.compatible		= "linkstation",
152	.probe 			= linkstation_probe,
153	.setup_arch 		= linkstation_setup_arch,
154	.discover_phbs		= linkstation_setup_pci,
155	.init_IRQ 		= linkstation_init_IRQ,
156	.show_cpuinfo 		= linkstation_show_cpuinfo,
157	.get_irq 		= mpic_get_irq,
158	.restart 		= linkstation_restart,
159	.halt	 		= linkstation_halt,
160};