1 /*
2  * arch/powerpc/platforms/83xx/mpc837x_rdb.c
3  *
4  * Copyright (C) 2007 Freescale Semicondutor, Inc. All rights reserved.
5  *
6  * MPC837x RDB board specific routines
7  *
8  * This program is free software; you can redistribute  it and/or modify it
9  * under  the terms of  the GNU General  Public License as published by the
10  * Free Software Foundation;  either version 2 of the  License, or (at your
11  * option) any later version.
12  */
13 
14 #include <linux/pci.h>
15 #include <linux/of_platform.h>
16 
17 #include <asm/time.h>
18 #include <asm/ipic.h>
19 #include <asm/udbg.h>
20 #include <sysdev/fsl_soc.h>
21 #include <sysdev/fsl_pci.h>
22 
23 #include "mpc83xx.h"
24 
25 static void mpc837x_rdb_sd_cfg(void)
26 {
27 	void __iomem *im;
28 
29 	im = ioremap(get_immrbase(), 0x1000);
30 	if (!im) {
31 		WARN_ON(1);
32 		return;
33 	}
34 
35 	/*
36 	 * On RDB boards (in contrast to MDS) USBB pins are used for SD only,
37 	 * so we can safely mux them away from the USB block.
38 	 */
39 	clrsetbits_be32(im + MPC83XX_SICRL_OFFS, MPC837X_SICRL_USBB_MASK,
40 						 MPC837X_SICRL_SD);
41 	clrsetbits_be32(im + MPC83XX_SICRH_OFFS, MPC837X_SICRH_SPI_MASK,
42 						 MPC837X_SICRH_SD);
43 	iounmap(im);
44 }
45 
46 /* ************************************************************************
47  *
48  * Setup the architecture
49  *
50  */
51 static void __init mpc837x_rdb_setup_arch(void)
52 {
53 #ifdef CONFIG_PCI
54 	struct device_node *np;
55 #endif
56 
57 	if (ppc_md.progress)
58 		ppc_md.progress("mpc837x_rdb_setup_arch()", 0);
59 
60 #ifdef CONFIG_PCI
61 	for_each_compatible_node(np, "pci", "fsl,mpc8349-pci")
62 		mpc83xx_add_bridge(np);
63 	for_each_compatible_node(np, "pci", "fsl,mpc8314-pcie")
64 		mpc83xx_add_bridge(np);
65 #endif
66 	mpc837x_usb_cfg();
67 	mpc837x_rdb_sd_cfg();
68 }
69 
70 static struct of_device_id mpc837x_ids[] = {
71 	{ .type = "soc", },
72 	{ .compatible = "soc", },
73 	{ .compatible = "simple-bus", },
74 	{ .compatible = "gianfar", },
75 	{},
76 };
77 
78 static int __init mpc837x_declare_of_platform_devices(void)
79 {
80 	/* Publish of_device */
81 	of_platform_bus_probe(NULL, mpc837x_ids, NULL);
82 
83 	return 0;
84 }
85 machine_device_initcall(mpc837x_rdb, mpc837x_declare_of_platform_devices);
86 
87 static void __init mpc837x_rdb_init_IRQ(void)
88 {
89 	struct device_node *np;
90 
91 	np = of_find_compatible_node(NULL, NULL, "fsl,ipic");
92 	if (!np)
93 		return;
94 
95 	ipic_init(np, 0);
96 
97 	/* Initialize the default interrupt mapping priorities,
98 	 * in case the boot rom changed something on us.
99 	 */
100 	ipic_set_default_priority();
101 }
102 
103 /*
104  * Called very early, MMU is off, device-tree isn't unflattened
105  */
106 static int __init mpc837x_rdb_probe(void)
107 {
108 	unsigned long root = of_get_flat_dt_root();
109 
110 	return of_flat_dt_is_compatible(root, "fsl,mpc8377rdb") ||
111 	       of_flat_dt_is_compatible(root, "fsl,mpc8378rdb") ||
112 	       of_flat_dt_is_compatible(root, "fsl,mpc8379rdb") ||
113 	       of_flat_dt_is_compatible(root, "fsl,mpc8377wlan");
114 }
115 
116 define_machine(mpc837x_rdb) {
117 	.name			= "MPC837x RDB/WLAN",
118 	.probe			= mpc837x_rdb_probe,
119 	.setup_arch		= mpc837x_rdb_setup_arch,
120 	.init_IRQ		= mpc837x_rdb_init_IRQ,
121 	.get_irq		= ipic_get_irq,
122 	.restart		= mpc83xx_restart,
123 	.time_init		= mpc83xx_time_init,
124 	.calibrate_decr		= generic_calibrate_decr,
125 	.progress		= udbg_progress,
126 };
127