/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 __initdata struct of_device_id of_bus_ids[] = {
 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	struct device_node *dnp;
 85	const u32 *prop;
 86	int size;
 87	phys_addr_t paddr;
 88
 89	dnp = of_find_node_by_type(NULL, "open-pic");
 90	if (dnp == NULL)
 91		return;
 92
 93	prop = of_get_property(dnp, "reg", &size);
 94	paddr = (phys_addr_t)of_translate_address(dnp, prop);
 95
 96	mpic = mpic_alloc(dnp, paddr, MPIC_PRIMARY | MPIC_WANTS_RESET, 4, 32, " EPIC     ");
 97	BUG_ON(mpic == NULL);
 98
 99	/* PCI IRQs */
100	mpic_assign_isu(mpic, 0, paddr + 0x10200);
101
102	/* I2C */
103	mpic_assign_isu(mpic, 1, paddr + 0x11000);
104
105	/* ttyS0, ttyS1 */
106	mpic_assign_isu(mpic, 2, paddr + 0x11100);
107
108	mpic_init(mpic);
109}
110
111extern void avr_uart_configure(void);
112extern void avr_uart_send(const char);
113
114static void linkstation_restart(char *cmd)
115{
116	local_irq_disable();
117
118	/* Reset system via AVR */
119	avr_uart_configure();
120	/* Send reboot command */
121	avr_uart_send('C');
122
123	for(;;)  /* Spin until reset happens */
124		avr_uart_send('G');	/* "kick" */
125}
126
127static void linkstation_power_off(void)
128{
129	local_irq_disable();
130
131	/* Power down system via AVR */
132	avr_uart_configure();
133	/* send shutdown command */
134	avr_uart_send('E');
135
136	for(;;)  /* Spin until power-off happens */
137		avr_uart_send('G');	/* "kick" */
138	/* NOTREACHED */
139}
140
141static void linkstation_halt(void)
142{
143	linkstation_power_off();
144	/* NOTREACHED */
145}
146
147static void linkstation_show_cpuinfo(struct seq_file *m)
148{
149	seq_printf(m, "vendor\t\t: Buffalo Technology\n");
150	seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n");
151}
152
153static int __init linkstation_probe(void)
154{
155	unsigned long root;
156
157	root = of_get_flat_dt_root();
158
159	if (!of_flat_dt_is_compatible(root, "linkstation"))
160		return 0;
161	return 1;
162}
163
164define_machine(linkstation){
165	.name 			= "Buffalo Linkstation",
166	.probe 			= linkstation_probe,
167	.setup_arch 		= linkstation_setup_arch,
168	.init_IRQ 		= linkstation_init_IRQ,
169	.show_cpuinfo 		= linkstation_show_cpuinfo,
170	.get_irq 		= mpic_get_irq,
171	.restart 		= linkstation_restart,
172	.power_off 		= linkstation_power_off,
173	.halt	 		= linkstation_halt,
174	.calibrate_decr 	= generic_calibrate_decr,
175};