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/*
* AmigaOne platform setup
*
* Copyright 2008 Gerhard Pircher (gerhard_pircher@gmx.net)
*
* Based on original amigaone_setup.c source code
* Copyright 2003 by Hans-Joerg Frieden and Thomas Frieden
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/seq_file.h>
#include <generated/utsrelease.h>
#include <asm/machdep.h>
#include <asm/cputable.h>
#include <asm/pci-bridge.h>
#include <asm/i8259.h>
#include <asm/time.h>
#include <asm/udbg.h>
#include <asm/dma.h>
extern void __flush_disable_L1(void);
void amigaone_show_cpuinfo(struct seq_file *m)
{
seq_printf(m, "vendor\t\t: Eyetech Ltd.\n");
}
static int __init amigaone_add_bridge(struct device_node *dev)
{
const u32 *cfg_addr, *cfg_data;
int len;
const int *bus_range;
struct pci_controller *hose;
printk(KERN_INFO "Adding PCI host bridge %s\n", dev->full_name);
cfg_addr = of_get_address(dev, 0, NULL, NULL);
cfg_data = of_get_address(dev, 1, NULL, NULL);
if ((cfg_addr == NULL) || (cfg_data == NULL))
return -ENODEV;
bus_range = of_get_property(dev, "bus-range", &len);
if ((bus_range == NULL) || (len < 2 * sizeof(int)))
printk(KERN_WARNING "Can't get bus-range for %s, assume"
" bus 0\n", dev->full_name);
hose = pcibios_alloc_controller(dev);
if (hose == NULL)
return -ENOMEM;
hose->first_busno = bus_range ? bus_range[0] : 0;
hose->last_busno = bus_range ? bus_range[1] : 0xff;
setup_indirect_pci(hose, cfg_addr[0], cfg_data[0], 0);
/* Interpret the "ranges" property */
/* This also maps the I/O region and sets isa_io/mem_base */
pci_process_bridge_OF_ranges(hose, dev, 1);
return 0;
}
void __init amigaone_setup_arch(void)
{
struct device_node *np;
int phb = -ENODEV;
/* Lookup PCI host bridges. */
for_each_compatible_node(np, "pci", "mai-logic,articia-s")
phb = amigaone_add_bridge(np);
BUG_ON(phb != 0);
if (ppc_md.progress)
ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0);
}
void __init amigaone_init_IRQ(void)
{
struct device_node *pic, *np = NULL;
const unsigned long *prop = NULL;
unsigned long int_ack = 0;
/* Search for ISA interrupt controller. */
pic = of_find_compatible_node(NULL, "interrupt-controller",
"pnpPNP,000");
BUG_ON(pic == NULL);
/* Look for interrupt acknowledge address in the PCI root node. */
np = of_find_compatible_node(NULL, "pci", "mai-logic,articia-s");
if (np) {
prop = of_get_property(np, "8259-interrupt-acknowledge", NULL);
if (prop)
int_ack = prop[0];
of_node_put(np);
}
if (int_ack == 0)
printk(KERN_WARNING "Cannot find PCI interrupt acknowledge"
" address, polling\n");
i8259_init(pic, int_ack);
ppc_md.get_irq = i8259_irq;
irq_set_default_host(i8259_get_host());
}
static int __init request_isa_regions(void)
{
request_region(0x00, 0x20, "dma1");
request_region(0x40, 0x20, "timer");
request_region(0x80, 0x10, "dma page reg");
request_region(0xc0, 0x20, "dma2");
return 0;
}
machine_device_initcall(amigaone, request_isa_regions);
void amigaone_restart(char *cmd)
{
local_irq_disable();
/* Flush and disable caches. */
__flush_disable_L1();
/* Set SRR0 to the reset vector and turn on MSR_IP. */
mtspr(SPRN_SRR0, 0xfff00100);
mtspr(SPRN_SRR1, MSR_IP);
/* Do an rfi to jump back to firmware. */
__asm__ __volatile__("rfi" : : : "memory");
/* Not reached. */
while (1);
}
static int __init amigaone_probe(void)
{
unsigned long root = of_get_flat_dt_root();
if (of_flat_dt_is_compatible(root, "eyetech,amigaone")) {
/*
* Coherent memory access cause complete system lockup! Thus
* disable this CPU feature, even if the CPU needs it.
*/
cur_cpu_spec->cpu_features &= ~CPU_FTR_NEED_COHERENT;
ISA_DMA_THRESHOLD = 0x00ffffff;
DMA_MODE_READ = 0x44;
DMA_MODE_WRITE = 0x48;
return 1;
}
return 0;
}
define_machine(amigaone) {
.name = "AmigaOne",
.probe = amigaone_probe,
.setup_arch = amigaone_setup_arch,
.show_cpuinfo = amigaone_show_cpuinfo,
.init_IRQ = amigaone_init_IRQ,
.restart = amigaone_restart,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
};
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