bcm6358-usbh-phy.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018 Álvaro Fernández Rojas <noltari@gmail.com>
*
* Derived from linux/arch/mips/bcm63xx/usb-common.c:
* Copyright 2008 Maxime Bizon <mbizon@freebox.fr>
* Copyright 2013 Florian Fainelli <florian@openwrt.org>
*/
#include <common.h>
#include <dm.h>
#include <generic-phy.h>
#include <malloc.h>
#include <reset.h>
#include <asm/io.h>
#include <dm/device.h>
/* USBH Swap Control register */
#define USBH_SWAP_REG 0x00
#define USBH_SWAP_OHCI_DATA BIT(0)
#define USBH_SWAP_OHCI_ENDIAN BIT(1)
#define USBH_SWAP_EHCI_DATA BIT(3)
#define USBH_SWAP_EHCI_ENDIAN BIT(4)
/* USBH Test register */
#define USBH_TEST_REG 0x24
#define USBH_TEST_PORT_CTL 0x1c0020
struct bcm6358_usbh_priv {
void __iomem *regs;
};
static int bcm6358_usbh_init(struct phy *phy)
{
struct bcm6358_usbh_priv *priv = dev_get_priv(phy->dev);
/* configure to work in native cpu endian */
clrsetbits_be32(priv->regs + USBH_SWAP_REG,
USBH_SWAP_EHCI_ENDIAN | USBH_SWAP_OHCI_ENDIAN,
USBH_SWAP_EHCI_DATA | USBH_SWAP_OHCI_DATA);
/* test port control */
writel_be(USBH_TEST_PORT_CTL, priv->regs + USBH_TEST_REG);
return 0;
}
static struct phy_ops bcm6358_usbh_ops = {
.init = bcm6358_usbh_init,
};
static const struct udevice_id bcm6358_usbh_ids[] = {
{ .compatible = "brcm,bcm6358-usbh" },
{ /* sentinel */ }
};
static int bcm6358_usbh_probe(struct udevice *dev)
{
struct bcm6358_usbh_priv *priv = dev_get_priv(dev);
struct reset_ctl rst_ctl;
int ret;
priv->regs = dev_remap_addr(dev);
if (!priv->regs)
return -EINVAL;
/* perform reset */
ret = reset_get_by_index(dev, 0, &rst_ctl);
if (ret < 0)
return ret;
ret = reset_deassert(&rst_ctl);
if (ret < 0)
return ret;
ret = reset_free(&rst_ctl);
if (ret < 0)
return ret;
return 0;
}
U_BOOT_DRIVER(bcm6358_usbh) = {
.name = "bcm6358-usbh",
.id = UCLASS_PHY,
.of_match = bcm6358_usbh_ids,
.ops = &bcm6358_usbh_ops,
.priv_auto_alloc_size = sizeof(struct bcm6358_usbh_priv),
.probe = bcm6358_usbh_probe,
};