1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * Freescale 83xx USB SOC setup code
 4 *
 5 * Copyright (C) 2007 Freescale Semiconductor, Inc.
 6 * Author: Li Yang
 7 */
 8
 9#include <linux/stddef.h>
10#include <linux/kernel.h>
11#include <linux/errno.h>
12#include <linux/of.h>
13#include <linux/of_address.h>
14#include <linux/io.h>
15
16#include <sysdev/fsl_soc.h>
17
18#include "mpc83xx.h"
19
20int __init mpc837x_usb_cfg(void)
21{
22	void __iomem *immap;
23	struct device_node *np = NULL;
24	const void *prop;
25	int ret = 0;
26
27	np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
28	if (!np || !of_device_is_available(np)) {
29		of_node_put(np);
30		return -ENODEV;
31	}
32	prop = of_get_property(np, "phy_type", NULL);
33
34	if (!prop || (strcmp(prop, "ulpi") && strcmp(prop, "serial"))) {
35		pr_warn("837x USB PHY type not supported\n");
36		of_node_put(np);
37		return -EINVAL;
38	}
39
40	/* Map IMMR space for pin and clock settings */
41	immap = ioremap(get_immrbase(), 0x1000);
42	if (!immap) {
43		of_node_put(np);
44		return -ENOMEM;
45	}
46
47	/* Configure clock */
48	clrsetbits_be32(immap + MPC83XX_SCCR_OFFS, MPC837X_SCCR_USB_DRCM_11,
49			MPC837X_SCCR_USB_DRCM_11);
50
51	/* Configure pin mux for ULPI/serial */
52	clrsetbits_be32(immap + MPC83XX_SICRL_OFFS, MPC837X_SICRL_USB_MASK,
53			MPC837X_SICRL_USB_ULPI);
54
55	iounmap(immap);
56	of_node_put(np);
57	return ret;
58}