LXR uboot/drivers/phy/bcm6358-usbh-phy.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (C) 2018 Álvaro Fernández Rojas <noltari@gmail.com>
   4 *
   5 * Derived from linux/arch/mips/bcm63xx/usb-common.c:
   6 *      Copyright 2008 Maxime Bizon <mbizon@freebox.fr>
   7 *      Copyright 2013 Florian Fainelli <florian@openwrt.org>
   8 */
   9
  10#include <common.h>
  11#include <dm.h>
  12#include <generic-phy.h>
  13#include <reset.h>
  14#include <asm/io.h>
  15#include <dm/device.h>
  16
  17/* USBH Swap Control register */
  18#define USBH_SWAP_REG           0x00
  19#define USBH_SWAP_OHCI_DATA     BIT(0)
  20#define USBH_SWAP_OHCI_ENDIAN   BIT(1)
  21#define USBH_SWAP_EHCI_DATA     BIT(3)
  22#define USBH_SWAP_EHCI_ENDIAN   BIT(4)
  23
  24/* USBH Test register */
  25#define USBH_TEST_REG           0x24
  26#define USBH_TEST_PORT_CTL      0x1c0020
  27
  28struct bcm6358_usbh_priv {
  29        void __iomem *regs;
  30};
  31
  32static int bcm6358_usbh_init(struct phy *phy)
  33{
  34        struct bcm6358_usbh_priv *priv = dev_get_priv(phy->dev);
  35
  36        /* configure to work in native cpu endian */
  37        clrsetbits_be32(priv->regs + USBH_SWAP_REG,
  38                        USBH_SWAP_EHCI_ENDIAN | USBH_SWAP_OHCI_ENDIAN,
  39                        USBH_SWAP_EHCI_DATA | USBH_SWAP_OHCI_DATA);
  40
  41        /* test port control */
  42        writel_be(USBH_TEST_PORT_CTL, priv->regs + USBH_TEST_REG);
  43
  44        return 0;
  45}
  46
  47static struct phy_ops bcm6358_usbh_ops = {
  48        .init = bcm6358_usbh_init,
  49};
  50
  51static const struct udevice_id bcm6358_usbh_ids[] = {
  52        { .compatible = "brcm,bcm6358-usbh" },
  53        { /* sentinel */ }
  54};
  55
  56static int bcm6358_usbh_probe(struct udevice *dev)
  57{
  58        struct bcm6358_usbh_priv *priv = dev_get_priv(dev);
  59        struct reset_ctl rst_ctl;
  60        int ret;
  61
  62        priv->regs = dev_remap_addr(dev);
  63        if (!priv->regs)
  64                return -EINVAL;
  65
  66        /* perform reset */
  67        ret = reset_get_by_index(dev, 0, &rst_ctl);
  68        if (ret < 0)
  69                return ret;
  70
  71        ret = reset_deassert(&rst_ctl);
  72        if (ret < 0)
  73                return ret;
  74
  75        ret = reset_free(&rst_ctl);
  76        if (ret < 0)
  77                return ret;
  78
  79        return 0;
  80}
  81
  82U_BOOT_DRIVER(bcm6358_usbh) = {
  83        .name = "bcm6358-usbh",
  84        .id = UCLASS_PHY,
  85        .of_match = bcm6358_usbh_ids,
  86        .ops = &bcm6358_usbh_ops,
  87        .priv_auto_alloc_size = sizeof(struct bcm6358_usbh_priv),
  88        .probe = bcm6358_usbh_probe,
  89};
  90