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 %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
85	mpic = mpic_alloc(NULL, 0, 0, 4, 0, " EPIC     ");
86	BUG_ON(mpic == NULL);
87
88	/* PCI IRQs */
89	mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200);
90
91	/* I2C */
92	mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000);
93
94	/* ttyS0, ttyS1 */
95	mpic_assign_isu(mpic, 2, mpic->paddr + 0x11100);
96
97	mpic_init(mpic);
98}
99
100extern void avr_uart_configure(void);
101extern void avr_uart_send(const char);
102
103static void 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 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 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	unsigned long root;
145
146	root = of_get_flat_dt_root();
147
148	if (!of_flat_dt_is_compatible(root, "linkstation"))
149		return 0;
150
151	pm_power_off = linkstation_power_off;
152
153	return 1;
154}
155
156define_machine(linkstation){
157	.name 			= "Buffalo Linkstation",
158	.probe 			= linkstation_probe,
159	.setup_arch 		= linkstation_setup_arch,
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