2 * AmigaOne platform setup
6 * Based on original amigaone_setup.c source code
7 * Copyright 2003 by Hans-Joerg Frieden and Thomas Frieden
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
15 #include <linux/kernel.h>
17 #include <linux/of_address.h>
18 #include <linux/seq_file.h>
19 #include <generated/utsrelease.h>
21 #include <asm/machdep.h>
22 #include <asm/cputable.h>
23 #include <asm/pci-bridge.h>
24 #include <asm/i8259.h>
29 extern void __flush_disable_L1(void);
31 void amigaone_show_cpuinfo(struct seq_file *m)
33 seq_printf(m, "vendor\t\t: Eyetech Ltd.\n");
36 static int __init amigaone_add_bridge(struct device_node *dev)
38 const u32 *cfg_addr, *cfg_data;
41 struct pci_controller *hose;
43 printk(KERN_INFO "Adding PCI host bridge %s\n", dev->full_name);
45 cfg_addr = of_get_address(dev, 0, NULL, NULL);
46 cfg_data = of_get_address(dev, 1, NULL, NULL);
47 if ((cfg_addr == NULL) || (cfg_data == NULL))
50 bus_range = of_get_property(dev, "bus-range", &len);
51 if ((bus_range == NULL) || (len < 2 * sizeof(int)))
52 printk(KERN_WARNING "Can't get bus-range for %s, assume"
53 " bus 0\n", dev->full_name);
55 hose = pcibios_alloc_controller(dev);
59 hose->first_busno = bus_range ? bus_range[0] : 0;
60 hose->last_busno = bus_range ? bus_range[1] : 0xff;
62 setup_indirect_pci(hose, cfg_addr[0], cfg_data[0], 0);
64 /* Interpret the "ranges" property */
65 /* This also maps the I/O region and sets isa_io/mem_base */
66 pci_process_bridge_OF_ranges(hose, dev, 1);
71 void __init amigaone_setup_arch(void)
73 struct device_node *np;
76 /* Lookup PCI host bridges. */
77 for_each_compatible_node(np, "pci", "mai-logic,articia-s")
78 phb = amigaone_add_bridge(np);
83 ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0);
86 void __init amigaone_init_IRQ(void)
88 struct device_node *pic, *np = NULL;
89 const unsigned long *prop = NULL;
90 unsigned long int_ack = 0;
92 /* Search for ISA interrupt controller. */
93 pic = of_find_compatible_node(NULL, "interrupt-controller",
97 /* Look for interrupt acknowledge address in the PCI root node. */
98 np = of_find_compatible_node(NULL, "pci", "mai-logic,articia-s");
100 prop = of_get_property(np, "8259-interrupt-acknowledge", NULL);
107 printk(KERN_WARNING "Cannot find PCI interrupt acknowledge"
108 " address, polling\n");
110 i8259_init(pic, int_ack);
111 ppc_md.get_irq = i8259_irq;
112 irq_set_default_host(i8259_get_host());
115 static int __init request_isa_regions(void)
117 request_region(0x00, 0x20, "dma1");
118 request_region(0x40, 0x20, "timer");
119 request_region(0x80, 0x10, "dma page reg");
120 request_region(0xc0, 0x20, "dma2");
124 machine_device_initcall(amigaone, request_isa_regions);
126 void __noreturn amigaone_restart(char *cmd)
130 /* Flush and disable caches. */
131 __flush_disable_L1();
133 /* Set SRR0 to the reset vector and turn on MSR_IP. */
134 mtspr(SPRN_SRR0, 0xfff00100);
135 mtspr(SPRN_SRR1, MSR_IP);
137 /* Do an rfi to jump back to firmware. */
138 __asm__ __volatile__("rfi" : : : "memory");
144 static int __init amigaone_probe(void)
146 if (of_machine_is_compatible("eyetech,amigaone")) {
148 * Coherent memory access cause complete system lockup! Thus
149 * disable this CPU feature, even if the CPU needs it.
151 cur_cpu_spec->cpu_features &= ~CPU_FTR_NEED_COHERENT;
153 ISA_DMA_THRESHOLD = 0x00ffffff;
154 DMA_MODE_READ = 0x44;
155 DMA_MODE_WRITE = 0x48;
163 define_machine(amigaone) {
165 .probe = amigaone_probe,
166 .setup_arch = amigaone_setup_arch,
167 .show_cpuinfo = amigaone_show_cpuinfo,
168 .init_IRQ = amigaone_init_IRQ,
169 .restart = amigaone_restart,
170 .calibrate_decr = generic_calibrate_decr,
171 .progress = udbg_progress,