LXR uboot/drivers/phy/bcm6348-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 <clk.h>
  12#include <dm.h>
  13#include <generic-phy.h>
  14#include <log.h>
  15#include <malloc.h>
  16#include <reset.h>
  17#include <asm/io.h>
  18#include <dm/device.h>
  19#include <linux/bitops.h>
  20
  21#define USBH_SETUP_PORT1_EN     BIT(0)
  22
  23struct bcm6348_usbh_priv {
  24        void __iomem *regs;
  25};
  26
  27static int bcm6348_usbh_init(struct phy *phy)
  28{
  29        struct bcm6348_usbh_priv *priv = dev_get_priv(phy->dev);
  30
  31        writel_be(USBH_SETUP_PORT1_EN, priv->regs);
  32
  33        return 0;
  34}
  35
  36static struct phy_ops bcm6348_usbh_ops = {
  37        .init = bcm6348_usbh_init,
  38};
  39
  40static const struct udevice_id bcm6348_usbh_ids[] = {
  41        { .compatible = "brcm,bcm6348-usbh" },
  42        { /* sentinel */ }
  43};
  44
  45static int bcm6348_usbh_probe(struct udevice *dev)
  46{
  47        struct bcm6348_usbh_priv *priv = dev_get_priv(dev);
  48        struct reset_ctl rst_ctl;
  49        struct clk clk;
  50        int ret;
  51
  52        priv->regs = dev_remap_addr(dev);
  53        if (!priv->regs)
  54                return -EINVAL;
  55
  56        /* enable usbh clock */
  57        ret = clk_get_by_name(dev, "usbh", &clk);
  58        if (ret < 0)
  59                return ret;
  60
  61        ret = clk_enable(&clk);
  62        if (ret < 0)
  63                return ret;
  64
  65        clk_free(&clk);
  66
  67        /* perform reset */
  68        ret = reset_get_by_index(dev, 0, &rst_ctl);
  69        if (ret < 0)
  70                return ret;
  71
  72        ret = reset_deassert(&rst_ctl);
  73        if (ret < 0)
  74                return ret;
  75
  76        ret = reset_free(&rst_ctl);
  77        if (ret < 0)
  78                return ret;
  79
  80        return 0;
  81}
  82
  83U_BOOT_DRIVER(bcm6348_usbh) = {
  84        .name = "bcm6348-usbh",
  85        .id = UCLASS_PHY,
  86        .of_match = bcm6348_usbh_ids,
  87        .ops = &bcm6348_usbh_ops,
  88        .priv_auto      = sizeof(struct bcm6348_usbh_priv),
  89        .probe = bcm6348_usbh_probe,
  90};
  91