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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Freescale 83xx USB SOC setup code
*
* Copyright (C) 2007 Freescale Semiconductor, Inc.
* Author: Li Yang
*/
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/io.h>
#include <sysdev/fsl_soc.h>
#include "mpc83xx.h"
int __init mpc837x_usb_cfg(void)
{
void __iomem *immap;
struct device_node *np = NULL;
const void *prop;
int ret = 0;
np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
if (!np || !of_device_is_available(np)) {
of_node_put(np);
return -ENODEV;
}
prop = of_get_property(np, "phy_type", NULL);
if (!prop || (strcmp(prop, "ulpi") && strcmp(prop, "serial"))) {
pr_warn("837x USB PHY type not supported\n");
of_node_put(np);
return -EINVAL;
}
/* Map IMMR space for pin and clock settings */
immap = ioremap(get_immrbase(), 0x1000);
if (!immap) {
of_node_put(np);
return -ENOMEM;
}
/* Configure clock */
clrsetbits_be32(immap + MPC83XX_SCCR_OFFS, MPC837X_SCCR_USB_DRCM_11,
MPC837X_SCCR_USB_DRCM_11);
/* Configure pin mux for ULPI/serial */
clrsetbits_be32(immap + MPC83XX_SICRL_OFFS, MPC837X_SICRL_USB_MASK,
MPC837X_SICRL_USB_ULPI);
iounmap(immap);
of_node_put(np);
return ret;
}
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