--- /dev/null
+/*
+ * 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/seq_file.h>
+#include <linux/utsrelease.h>
+
+#include <asm/machdep.h>
+#include <asm/cputable.h>
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
+#include <asm/i8259.h>
+#include <asm/time.h>
+#include <asm/udbg.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());
+}
+
+void __init amigaone_init(void)
+{
+ request_region(0x00, 0x20, "dma1");
+ request_region(0x40, 0x20, "timer");
+ request_region(0x80, 0x10, "dma page reg");
+ request_region(0xc0, 0x20, "dma2");
+}
+
+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,
+ .init = amigaone_init,
+ .show_cpuinfo = amigaone_show_cpuinfo,
+ .init_IRQ = amigaone_init_IRQ,
+ .restart = amigaone_restart,
+ .calibrate_decr = generic_calibrate_decr,
+ .progress = udbg_progress,
+};
projects / openwrt / staging / blogic.git / commitdiff