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/mpic.h>
19#include <asm/pci-bridge.h>
20
21#include "mpc10x.h"
22
23static const struct of_device_id of_bus_ids[] __initconst = {
24	{ .type = "soc", },
25	{ .compatible = "simple-bus", },
26	{},
27};
28
29static int __init declare_of_platform_devices(void)
30{
31	of_platform_bus_probe(NULL, of_bus_ids, NULL);
32	return 0;
33}
34machine_device_initcall(linkstation, declare_of_platform_devices);
35
36static int __init linkstation_add_bridge(struct device_node *dev)
37{
38#ifdef CONFIG_PCI
39	int len;
40	struct pci_controller *hose;
41	const int *bus_range;
42
43	printk("Adding PCI host bridge %pOF\n", dev);
44
45	bus_range = of_get_property(dev, "bus-range", &len);
46	if (bus_range == NULL || len < 2 * sizeof(int))
47		printk(KERN_WARNING "Can't get bus-range for %pOF, assume"
48				" bus 0\n", dev);
49
50	hose = pcibios_alloc_controller(dev);
51	if (hose == NULL)
52		return -ENOMEM;
53	hose->first_busno = bus_range ? bus_range[0] : 0;
54	hose->last_busno = bus_range ? bus_range[1] : 0xff;
55	setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0);
56
57	/* Interpret the "ranges" property */
58	/* This also maps the I/O region and sets isa_io/mem_base */
59	pci_process_bridge_OF_ranges(hose, dev, 1);
60#endif
61	return 0;
62}
63
64static void __init linkstation_setup_arch(void)
65{
66	printk(KERN_INFO "BUFFALO Network Attached Storage Series\n");
67	printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n");
68}
69
70static void __init linkstation_setup_pci(void)
71{
72	struct device_node *np;
73
74	/* Lookup PCI host bridges */
75	for_each_compatible_node(np, "pci", "mpc10x-pci")
76		linkstation_add_bridge(np);
77}
78
79/*
80 * Interrupt setup and service.  Interrupts on the linkstation come
81 * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
82 */
83static void __init linkstation_init_IRQ(void)
84{
85	struct mpic *mpic;
86
87	mpic = mpic_alloc(NULL, 0, 0, 4, 0, " EPIC     ");
88	BUG_ON(mpic == NULL);
89
90	/* PCI IRQs */
91	mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200);
92
93	/* I2C */
94	mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000);
95
96	/* ttyS0, ttyS1 */
97	mpic_assign_isu(mpic, 2, mpic->paddr + 0x11100);
98
99	mpic_init(mpic);
100}
101
102static void __noreturn linkstation_restart(char *cmd)
103{
104	local_irq_disable();
105
106	/* Reset system via AVR */
107	avr_uart_configure();
108	/* Send reboot command */
109	avr_uart_send('C');
110
111	for(;;)  /* Spin until reset happens */
112		avr_uart_send('G');	/* "kick" */
113}
114
115static void __noreturn linkstation_power_off(void)
116{
117	local_irq_disable();
118
119	/* Power down system via AVR */
120	avr_uart_configure();
121	/* send shutdown command */
122	avr_uart_send('E');
123
124	for(;;)  /* Spin until power-off happens */
125		avr_uart_send('G');	/* "kick" */
126	/* NOTREACHED */
127}
128
129static void __noreturn linkstation_halt(void)
130{
131	linkstation_power_off();
132	/* NOTREACHED */
133}
134
135static void linkstation_show_cpuinfo(struct seq_file *m)
136{
137	seq_printf(m, "vendor\t\t: Buffalo Technology\n");
138	seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n");
139}
140
141static int __init linkstation_probe(void)
142{
143	pm_power_off = linkstation_power_off;
144
145	return 1;
146}
147
148define_machine(linkstation){
149	.name 			= "Buffalo Linkstation",
150	.compatible		= "linkstation",
151	.probe 			= linkstation_probe,
152	.setup_arch 		= linkstation_setup_arch,
153	.discover_phbs		= linkstation_setup_pci,
154	.init_IRQ 		= linkstation_init_IRQ,
155	.show_cpuinfo 		= linkstation_show_cpuinfo,
156	.get_irq 		= mpic_get_irq,
157	.restart 		= linkstation_restart,
158	.halt	 		= linkstation_halt,
159};
160