1 /*
2  * ppa8548 setup and early boot code.
3  *
4  * Copyright 2009 Prodrive B.V..
5  *
6  * By Stef van Os (see MAINTAINERS for contact information)
7  *
8  * Based on the SBC8548 support - Copyright 2007 Wind River Systems Inc.
9  * Based on the MPC8548CDS support - Copyright 2005 Freescale Inc.
10  *
11  * This program is free software; you can redistribute  it and/or modify it
12  * under  the terms of  the GNU General  Public License as published by the
13  * Free Software Foundation;  either version 2 of the  License, or (at your
14  * option) any later version.
15  */
16 
17 #include <linux/stddef.h>
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 #include <linux/reboot.h>
21 #include <linux/seq_file.h>
22 #include <linux/of_fdt.h>
23 #include <linux/of_platform.h>
24 
25 #include <asm/machdep.h>
26 #include <asm/udbg.h>
27 #include <asm/mpic.h>
28 
29 #include <sysdev/fsl_soc.h>
30 
31 static void __init ppa8548_pic_init(void)
32 {
33 	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
34 			0, 256, " OpenPIC  ");
35 	BUG_ON(mpic == NULL);
36 	mpic_init(mpic);
37 }
38 
39 /*
40  * Setup the architecture
41  */
42 static void __init ppa8548_setup_arch(void)
43 {
44 	if (ppc_md.progress)
45 		ppc_md.progress("ppa8548_setup_arch()", 0);
46 }
47 
48 static void ppa8548_show_cpuinfo(struct seq_file *m)
49 {
50 	uint32_t svid, phid1;
51 
52 	svid = mfspr(SPRN_SVR);
53 
54 	seq_printf(m, "Vendor\t\t: Prodrive B.V.\n");
55 	seq_printf(m, "SVR\t\t: 0x%x\n", svid);
56 
57 	/* Display cpu Pll setting */
58 	phid1 = mfspr(SPRN_HID1);
59 	seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
60 }
61 
62 static const struct of_device_id of_bus_ids[] __initconst = {
63 	{ .name = "soc", },
64 	{ .type = "soc", },
65 	{ .compatible = "simple-bus", },
66 	{ .compatible = "gianfar", },
67 	{ .compatible = "fsl,srio", },
68 	{},
69 };
70 
71 static int __init declare_of_platform_devices(void)
72 {
73 	of_platform_bus_probe(NULL, of_bus_ids, NULL);
74 
75 	return 0;
76 }
77 machine_device_initcall(ppa8548, declare_of_platform_devices);
78 
79 /*
80  * Called very early, device-tree isn't unflattened
81  */
82 static int __init ppa8548_probe(void)
83 {
84 	unsigned long root = of_get_flat_dt_root();
85 
86 	return of_flat_dt_is_compatible(root, "ppa8548");
87 }
88 
89 define_machine(ppa8548) {
90 	.name		= "ppa8548",
91 	.probe		= ppa8548_probe,
92 	.setup_arch	= ppa8548_setup_arch,
93 	.init_IRQ	= ppa8548_pic_init,
94 	.show_cpuinfo	= ppa8548_show_cpuinfo,
95 	.get_irq	= mpic_get_irq,
96 	.restart	= fsl_rstcr_restart,
97 	.calibrate_decr = generic_calibrate_decr,
98 	.progress	= udbg_progress,
99 };
100