1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * arch/powerpc/platforms/83xx/mpc837x_mds.c
4 *
5 * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
6 *
7 * MPC837x MDS board specific routines
8 */
9
10#include <linux/pci.h>
11#include <linux/of.h>
12#include <linux/of_platform.h>
13
14#include <asm/time.h>
15#include <asm/ipic.h>
16#include <asm/udbg.h>
17#include <asm/prom.h>
18#include <sysdev/fsl_pci.h>
19
20#include "mpc83xx.h"
21
22#define BCSR12_USB_SER_MASK	0x8a
23#define BCSR12_USB_SER_PIN	0x80
24#define BCSR12_USB_SER_DEVICE	0x02
25
26static int mpc837xmds_usb_cfg(void)
27{
28	struct device_node *np;
29	const void *phy_type, *mode;
30	void __iomem *bcsr_regs = NULL;
31	u8 bcsr12;
32	int ret;
33
34	ret = mpc837x_usb_cfg();
35	if (ret)
36		return ret;
37	/* Map BCSR area */
38	np = of_find_compatible_node(NULL, NULL, "fsl,mpc837xmds-bcsr");
39	if (np) {
40		bcsr_regs = of_iomap(np, 0);
41		of_node_put(np);
42	}
43	if (!bcsr_regs)
44		return -1;
45
46	np = of_find_node_by_name(NULL, "usb");
47	if (!np) {
48		ret = -ENODEV;
49		goto out;
50	}
51	phy_type = of_get_property(np, "phy_type", NULL);
52	if (phy_type && !strcmp(phy_type, "ulpi")) {
53		clrbits8(bcsr_regs + 12, BCSR12_USB_SER_PIN);
54	} else if (phy_type && !strcmp(phy_type, "serial")) {
55		mode = of_get_property(np, "dr_mode", NULL);
56		bcsr12 = in_8(bcsr_regs + 12) & ~BCSR12_USB_SER_MASK;
57		bcsr12 |= BCSR12_USB_SER_PIN;
58		if (mode && !strcmp(mode, "peripheral"))
59			bcsr12 |= BCSR12_USB_SER_DEVICE;
60		out_8(bcsr_regs + 12, bcsr12);
61	} else {
62		printk(KERN_ERR "USB DR: unsupported PHY\n");
63	}
64
65	of_node_put(np);
66out:
67	iounmap(bcsr_regs);
68	return ret;
69}
70
71/* ************************************************************************
72 *
73 * Setup the architecture
74 *
75 */
76static void __init mpc837x_mds_setup_arch(void)
77{
78	mpc83xx_setup_arch();
79	mpc837xmds_usb_cfg();
80}
81
82machine_device_initcall(mpc837x_mds, mpc83xx_declare_of_platform_devices);
83
84/*
85 * Called very early, MMU is off, device-tree isn't unflattened
86 */
87static int __init mpc837x_mds_probe(void)
88{
89	return of_machine_is_compatible("fsl,mpc837xmds");
90}
91
92define_machine(mpc837x_mds) {
93	.name			= "MPC837x MDS",
94	.probe			= mpc837x_mds_probe,
95	.setup_arch		= mpc837x_mds_setup_arch,
96	.init_IRQ		= mpc83xx_ipic_init_IRQ,
97	.get_irq		= ipic_get_irq,
98	.restart		= mpc83xx_restart,
99	.time_init		= mpc83xx_time_init,
100	.calibrate_decr		= generic_calibrate_decr,
101	.progress		= udbg_progress,
102};
103