1 /*
2  * Copyright (c) 2008 Emcraft Systems
3  * Sergei Poselenov <sposelenov@emcraft.com>
4  *
5  * Based on MPC8560 ADS and arch/ppc tqm85xx ports
6  *
7  * Maintained by Kumar Gala (see MAINTAINERS for contact information)
8  *
9  * Copyright 2008 Freescale Semiconductor Inc.
10  *
11  * Copyright (c) 2005-2006 DENX Software Engineering
12  * Stefan Roese <sr@denx.de>
13  *
14  * Based on original work by
15  * 	Kumar Gala <kumar.gala@freescale.com>
16  *      Copyright 2004 Freescale Semiconductor Inc.
17  *
18  * This program is free software; you can redistribute  it and/or modify it
19  * under  the terms of  the GNU General  Public License as published by the
20  * Free Software Foundation;  either version 2 of the  License, or (at your
21  * option) any later version.
22  */
23 
24 #include <linux/stddef.h>
25 #include <linux/kernel.h>
26 #include <linux/pci.h>
27 #include <linux/kdev_t.h>
28 #include <linux/delay.h>
29 #include <linux/seq_file.h>
30 #include <linux/of_platform.h>
31 
32 #include <asm/system.h>
33 #include <asm/time.h>
34 #include <asm/machdep.h>
35 #include <asm/pci-bridge.h>
36 #include <asm/mpic.h>
37 #include <asm/prom.h>
38 #include <mm/mmu_decl.h>
39 #include <asm/udbg.h>
40 
41 #include <sysdev/fsl_soc.h>
42 #include <sysdev/fsl_pci.h>
43 
44 #include "socrates_fpga_pic.h"
45 
46 static void __init socrates_pic_init(void)
47 {
48 	struct mpic *mpic;
49 	struct resource r;
50 	struct device_node *np;
51 
52 	np = of_find_node_by_type(NULL, "open-pic");
53 	if (!np) {
54 		printk(KERN_ERR "Could not find open-pic node\n");
55 		return;
56 	}
57 
58 	if (of_address_to_resource(np, 0, &r)) {
59 		printk(KERN_ERR "Could not map mpic register space\n");
60 		of_node_put(np);
61 		return;
62 	}
63 
64 	mpic = mpic_alloc(np, r.start,
65 			MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
66 			0, 256, " OpenPIC  ");
67 	BUG_ON(mpic == NULL);
68 	of_node_put(np);
69 
70 	mpic_init(mpic);
71 
72 	np = of_find_compatible_node(NULL, NULL, "abb,socrates-fpga-pic");
73 	if (!np) {
74 		printk(KERN_ERR "Could not find socrates-fpga-pic node\n");
75 		return;
76 	}
77 	socrates_fpga_pic_init(np);
78 	of_node_put(np);
79 }
80 
81 /*
82  * Setup the architecture
83  */
84 static void __init socrates_setup_arch(void)
85 {
86 #ifdef CONFIG_PCI
87 	struct device_node *np;
88 #endif
89 
90 	if (ppc_md.progress)
91 		ppc_md.progress("socrates_setup_arch()", 0);
92 
93 #ifdef CONFIG_PCI
94 	for_each_compatible_node(np, "pci", "fsl,mpc8540-pci")
95 		fsl_add_bridge(np, 1);
96 #endif
97 }
98 
99 static struct of_device_id __initdata socrates_of_bus_ids[] = {
100 	{ .compatible = "simple-bus", },
101 	{ .compatible = "gianfar", },
102 	{},
103 };
104 
105 static int __init socrates_publish_devices(void)
106 {
107 	return of_platform_bus_probe(NULL, socrates_of_bus_ids, NULL);
108 }
109 machine_device_initcall(socrates, socrates_publish_devices);
110 
111 /*
112  * Called very early, device-tree isn't unflattened
113  */
114 static int __init socrates_probe(void)
115 {
116 	unsigned long root = of_get_flat_dt_root();
117 
118 	if (of_flat_dt_is_compatible(root, "abb,socrates"))
119 		return 1;
120 
121 	return 0;
122 }
123 
124 define_machine(socrates) {
125 	.name			= "Socrates",
126 	.probe			= socrates_probe,
127 	.setup_arch		= socrates_setup_arch,
128 	.init_IRQ		= socrates_pic_init,
129 	.get_irq		= mpic_get_irq,
130 	.restart		= fsl_rstcr_restart,
131 	.calibrate_decr		= generic_calibrate_decr,
132 	.progress		= udbg_progress,
133 };
134