1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * ppa8548 setup and early boot code.
4  *
5  * Copyright 2009 Prodrive B.V..
6  *
7  * By Stef van Os (see MAINTAINERS for contact information)
8  *
9  * Based on the SBC8548 support - Copyright 2007 Wind River Systems Inc.
10  * Based on the MPC8548CDS support - Copyright 2005 Freescale Inc.
11  */
12 
13 #include <linux/stddef.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/reboot.h>
17 #include <linux/seq_file.h>
18 #include <linux/of_fdt.h>
19 #include <linux/of_platform.h>
20 
21 #include <asm/machdep.h>
22 #include <asm/udbg.h>
23 #include <asm/mpic.h>
24 
25 #include <sysdev/fsl_soc.h>
26 
27 static void __init ppa8548_pic_init(void)
28 {
29 	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
30 			0, 256, " OpenPIC  ");
31 	BUG_ON(mpic == NULL);
32 	mpic_init(mpic);
33 }
34 
35 /*
36  * Setup the architecture
37  */
38 static void __init ppa8548_setup_arch(void)
39 {
40 	if (ppc_md.progress)
41 		ppc_md.progress("ppa8548_setup_arch()", 0);
42 }
43 
44 static void ppa8548_show_cpuinfo(struct seq_file *m)
45 {
46 	uint32_t svid, phid1;
47 
48 	svid = mfspr(SPRN_SVR);
49 
50 	seq_printf(m, "Vendor\t\t: Prodrive B.V.\n");
51 	seq_printf(m, "SVR\t\t: 0x%x\n", svid);
52 
53 	/* Display cpu Pll setting */
54 	phid1 = mfspr(SPRN_HID1);
55 	seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
56 }
57 
58 static const struct of_device_id of_bus_ids[] __initconst = {
59 	{ .name = "soc", },
60 	{ .type = "soc", },
61 	{ .compatible = "simple-bus", },
62 	{ .compatible = "gianfar", },
63 	{ .compatible = "fsl,srio", },
64 	{},
65 };
66 
67 static int __init declare_of_platform_devices(void)
68 {
69 	of_platform_bus_probe(NULL, of_bus_ids, NULL);
70 
71 	return 0;
72 }
73 machine_device_initcall(ppa8548, declare_of_platform_devices);
74 
75 define_machine(ppa8548) {
76 	.name		= "ppa8548",
77 	.compatible	= "ppa8548",
78 	.setup_arch	= ppa8548_setup_arch,
79 	.init_IRQ	= ppa8548_pic_init,
80 	.show_cpuinfo	= ppa8548_show_cpuinfo,
81 	.get_irq	= mpic_get_irq,
82 	.progress	= udbg_progress,
83 };
84