/arch/powerpc/platforms/85xx/mpc8536_ds.c

  1/*
  2 * MPC8536 DS Board Setup
  3 *
  4 * Copyright 2008 Freescale Semiconductor, Inc.
  5 *
  6 * This program is free software; you can redistribute  it and/or modify it
  7 * under  the terms of  the GNU General  Public License as published by the
  8 * Free Software Foundation;  either version 2 of the  License, or (at your
  9 * option) any later version.
 10 */
 11
 12#include <linux/stddef.h>
 13#include <linux/kernel.h>
 14#include <linux/pci.h>
 15#include <linux/kdev_t.h>
 16#include <linux/delay.h>
 17#include <linux/seq_file.h>
 18#include <linux/interrupt.h>
 19#include <linux/of_platform.h>
 20#include <linux/lmb.h>
 21
 22#include <asm/system.h>
 23#include <asm/time.h>
 24#include <asm/machdep.h>
 25#include <asm/pci-bridge.h>
 26#include <mm/mmu_decl.h>
 27#include <asm/prom.h>
 28#include <asm/udbg.h>
 29#include <asm/mpic.h>
 30#include <asm/swiotlb.h>
 31
 32#include <sysdev/fsl_soc.h>
 33#include <sysdev/fsl_pci.h>
 34
 35void __init mpc8536_ds_pic_init(void)
 36{
 37	struct mpic *mpic;
 38	struct resource r;
 39	struct device_node *np;
 40
 41	np = of_find_node_by_type(NULL, "open-pic");
 42	if (np == NULL) {
 43		printk(KERN_ERR "Could not find open-pic node\n");
 44		return;
 45	}
 46
 47	if (of_address_to_resource(np, 0, &r)) {
 48		printk(KERN_ERR "Failed to map mpic register space\n");
 49		of_node_put(np);
 50		return;
 51	}
 52
 53	mpic = mpic_alloc(np, r.start,
 54			  MPIC_PRIMARY | MPIC_WANTS_RESET |
 55			  MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS,
 56			0, 256, " OpenPIC  ");
 57	BUG_ON(mpic == NULL);
 58	of_node_put(np);
 59
 60	mpic_init(mpic);
 61}
 62
 63/*
 64 * Setup the architecture
 65 */
 66static void __init mpc8536_ds_setup_arch(void)
 67{
 68#ifdef CONFIG_PCI
 69	struct device_node *np;
 70	struct pci_controller *hose;
 71#endif
 72	dma_addr_t max = 0xffffffff;
 73
 74	if (ppc_md.progress)
 75		ppc_md.progress("mpc8536_ds_setup_arch()", 0);
 76
 77#ifdef CONFIG_PCI
 78	for_each_node_by_type(np, "pci") {
 79		if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
 80		    of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
 81			struct resource rsrc;
 82			of_address_to_resource(np, 0, &rsrc);
 83			if ((rsrc.start & 0xfffff) == 0x8000)
 84				fsl_add_bridge(np, 1);
 85			else
 86				fsl_add_bridge(np, 0);
 87
 88			hose = pci_find_hose_for_OF_device(np);
 89			max = min(max, hose->dma_window_base_cur +
 90					hose->dma_window_size);
 91		}
 92	}
 93
 94#endif
 95
 96#ifdef CONFIG_SWIOTLB
 97	if (lmb_end_of_DRAM() > max) {
 98		ppc_swiotlb_enable = 1;
 99		set_pci_dma_ops(&swiotlb_dma_ops);
100		ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
101	}
102#endif
103
104	printk("MPC8536 DS board from Freescale Semiconductor\n");
105}
106
107static struct of_device_id __initdata mpc8536_ds_ids[] = {
108	{ .type = "soc", },
109	{ .compatible = "soc", },
110	{ .compatible = "simple-bus", },
111	{ .compatible = "gianfar", },
112	{},
113};
114
115static int __init mpc8536_ds_publish_devices(void)
116{
117	return of_platform_bus_probe(NULL, mpc8536_ds_ids, NULL);
118}
119machine_device_initcall(mpc8536_ds, mpc8536_ds_publish_devices);
120
121machine_arch_initcall(mpc8536_ds, swiotlb_setup_bus_notifier);
122
123/*
124 * Called very early, device-tree isn't unflattened
125 */
126static int __init mpc8536_ds_probe(void)
127{
128	unsigned long root = of_get_flat_dt_root();
129
130	return of_flat_dt_is_compatible(root, "fsl,mpc8536ds");
131}
132
133define_machine(mpc8536_ds) {
134	.name			= "MPC8536 DS",
135	.probe			= mpc8536_ds_probe,
136	.setup_arch		= mpc8536_ds_setup_arch,
137	.init_IRQ		= mpc8536_ds_pic_init,
138#ifdef CONFIG_PCI
139	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
140#endif
141	.get_irq		= mpic_get_irq,
142	.restart		= fsl_rstcr_restart,
143	.calibrate_decr		= generic_calibrate_decr,
144	.progress		= udbg_progress,
145};