1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * arch/powerpc/platforms/83xx/mpc834x_mds.c
4 *
5 * MPC834x MDS board specific routines
6 *
7 * Maintainer: Kumar Gala <galak@kernel.crashing.org>
8 */
9
10#include <linux/stddef.h>
11#include <linux/kernel.h>
12#include <linux/init.h>
13#include <linux/errno.h>
14#include <linux/reboot.h>
15#include <linux/pci.h>
16#include <linux/kdev_t.h>
17#include <linux/major.h>
18#include <linux/console.h>
19#include <linux/delay.h>
20#include <linux/seq_file.h>
21#include <linux/root_dev.h>
22#include <linux/of_platform.h>
23
24#include <linux/atomic.h>
25#include <asm/time.h>
26#include <asm/io.h>
27#include <asm/machdep.h>
28#include <asm/ipic.h>
29#include <asm/irq.h>
30#include <asm/prom.h>
31#include <asm/udbg.h>
32#include <sysdev/fsl_soc.h>
33#include <sysdev/fsl_pci.h>
34
35#include "mpc83xx.h"
36
37#define BCSR5_INT_USB		0x02
38static int mpc834xemds_usb_cfg(void)
39{
40	struct device_node *np;
41	void __iomem *bcsr_regs = NULL;
42	u8 bcsr5;
43
44	mpc834x_usb_cfg();
45	/* Map BCSR area */
46	np = of_find_node_by_name(NULL, "bcsr");
47	if (np) {
48		struct resource res;
49
50		of_address_to_resource(np, 0, &res);
51		bcsr_regs = ioremap(res.start, resource_size(&res));
52		of_node_put(np);
53	}
54	if (!bcsr_regs)
55		return -1;
56
57	/*
58	 * if Processor Board is plugged into PIB board,
59	 * force to use the PHY on Processor Board
60	 */
61	bcsr5 = in_8(bcsr_regs + 5);
62	if (!(bcsr5 & BCSR5_INT_USB))
63		out_8(bcsr_regs + 5, (bcsr5 | BCSR5_INT_USB));
64	iounmap(bcsr_regs);
65	return 0;
66}
67
68/* ************************************************************************
69 *
70 * Setup the architecture
71 *
72 */
73static void __init mpc834x_mds_setup_arch(void)
74{
75	mpc83xx_setup_arch();
76
77	mpc834xemds_usb_cfg();
78}
79
80machine_device_initcall(mpc834x_mds, mpc83xx_declare_of_platform_devices);
81
82/*
83 * Called very early, MMU is off, device-tree isn't unflattened
84 */
85static int __init mpc834x_mds_probe(void)
86{
87	return of_machine_is_compatible("MPC834xMDS");
88}
89
90define_machine(mpc834x_mds) {
91	.name			= "MPC834x MDS",
92	.probe			= mpc834x_mds_probe,
93	.setup_arch		= mpc834x_mds_setup_arch,
94	.init_IRQ		= mpc83xx_ipic_init_IRQ,
95	.get_irq		= ipic_get_irq,
96	.restart		= mpc83xx_restart,
97	.time_init		= mpc83xx_time_init,
98	.calibrate_decr		= generic_calibrate_decr,
99	.progress		= udbg_progress,
100};
101