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+/*
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+ * Copyright (C) 2018 Ãlvaro Fernández Rojas <noltari@gmail.com>
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+ *
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+ * Derived from linux/arch/mips/bcm63xx/usb-common.c:
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+ * Copyright 2008 Maxime Bizon <mbizon@freebox.fr>
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+ * Copyright 2013 Florian Fainelli <florian@openwrt.org>
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+ *
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+ * SPDX-License-Identifier: GPL-2.0+
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+ */
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+
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+#include <common.h>
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+#include <clk.h>
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+#include <dm.h>
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+#include <generic-phy.h>
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+#include <power-domain.h>
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+#include <reset.h>
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+#include <asm/io.h>
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+#include <dm/device.h>
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+
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+/* USBH PLL Control register */
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+#define USBH_PLL_REG 0x18
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+#define USBH_PLL_IDDQ_PWRDN BIT(9)
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+#define USBH_PLL_PWRDN_DELAY BIT(10)
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+
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+/* USBH Swap Control register */
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+#define USBH_SWAP_REG 0x1c
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+#define USBH_SWAP_OHCI_DATA BIT(0)
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+#define USBH_SWAP_OHCI_ENDIAN BIT(1)
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+#define USBH_SWAP_EHCI_DATA BIT(3)
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+#define USBH_SWAP_EHCI_ENDIAN BIT(4)
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+
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+/* USBH Setup register */
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+#define USBH_SETUP_REG 0x28
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+#define USBH_SETUP_IOC BIT(4)
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+#define USBH_SETUP_IPP BIT(5)
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+
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+struct bcm6368_usbh_hw {
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+ uint32_t setup_clr;
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+ uint32_t pll_clr;
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+};
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+
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+struct bcm6368_usbh_priv {
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+ const struct bcm6368_usbh_hw *hw;
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+ void __iomem *regs;
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+};
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+
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+static int bcm6368_usbh_init(struct phy *phy)
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+{
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+ struct bcm6368_usbh_priv *priv = dev_get_priv(phy->dev);
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+ const struct bcm6368_usbh_hw *hw = priv->hw;
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+
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+ /* configure to work in native cpu endian */
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+ clrsetbits_be32(priv->regs + USBH_SWAP_REG,
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+ USBH_SWAP_EHCI_ENDIAN | USBH_SWAP_OHCI_ENDIAN,
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+ USBH_SWAP_EHCI_DATA | USBH_SWAP_OHCI_DATA);
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+
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+ /* setup config */
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+ if (hw->setup_clr)
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+ clrbits_be32(priv->regs + USBH_SETUP_REG, hw->setup_clr);
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+
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+ setbits_be32(priv->regs + USBH_SETUP_REG, USBH_SETUP_IOC);
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+
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+ /* enable pll control */
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+ if (hw->pll_clr)
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+ clrbits_be32(priv->regs + USBH_PLL_REG, hw->pll_clr);
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+
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+ return 0;
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+}
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+
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+static struct phy_ops bcm6368_usbh_ops = {
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+ .init = bcm6368_usbh_init,
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+};
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+
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+static const struct bcm6368_usbh_hw bcm6328_hw = {
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+ .pll_clr = USBH_PLL_IDDQ_PWRDN | USBH_PLL_PWRDN_DELAY,
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+ .setup_clr = 0,
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+};
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+
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+static const struct bcm6368_usbh_hw bcm6362_hw = {
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+ .pll_clr = 0,
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+ .setup_clr = 0,
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+};
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+
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+static const struct bcm6368_usbh_hw bcm6368_hw = {
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+ .pll_clr = 0,
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+ .setup_clr = 0,
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+};
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+
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+static const struct bcm6368_usbh_hw bcm63268_hw = {
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+ .pll_clr = USBH_PLL_IDDQ_PWRDN | USBH_PLL_PWRDN_DELAY,
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+ .setup_clr = USBH_SETUP_IPP,
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+};
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+
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+static const struct udevice_id bcm6368_usbh_ids[] = {
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+ {
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+ .compatible = "brcm,bcm6328-usbh",
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+ .data = (ulong)&bcm6328_hw,
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+ }, {
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+ .compatible = "brcm,bcm6362-usbh",
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+ .data = (ulong)&bcm6362_hw,
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+ }, {
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+ .compatible = "brcm,bcm6368-usbh",
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+ .data = (ulong)&bcm6368_hw,
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+ }, {
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+ .compatible = "brcm,bcm63268-usbh",
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+ .data = (ulong)&bcm63268_hw,
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+ }, { /* sentinel */ }
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+};
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+
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+static int bcm6368_usbh_probe(struct udevice *dev)
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+{
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+ struct bcm6368_usbh_priv *priv = dev_get_priv(dev);
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+ const struct bcm6368_usbh_hw *hw =
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+ (const struct bcm6368_usbh_hw *)dev_get_driver_data(dev);
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+#if defined(CONFIG_POWER_DOMAIN)
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+ struct power_domain pwr_dom;
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+#endif
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+ struct reset_ctl rst_ctl;
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+ struct clk clk;
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+ fdt_addr_t addr;
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+ fdt_size_t size;
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+ int ret;
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+
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+ addr = devfdt_get_addr_size_index(dev, 0, &size);
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+ if (addr == FDT_ADDR_T_NONE)
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+ return -EINVAL;
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+
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+ priv->regs = ioremap(addr, size);
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+ priv->hw = hw;
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+
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+ /* enable usbh clock */
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+ ret = clk_get_by_name(dev, "usbh", &clk);
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+ if (ret < 0)
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+ return ret;
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+
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+ ret = clk_enable(&clk);
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+ if (ret < 0)
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+ return ret;
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+
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+ ret = clk_free(&clk);
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+ if (ret < 0)
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+ return ret;
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+
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+#if defined(CONFIG_POWER_DOMAIN)
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+ /* enable power domain */
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+ ret = power_domain_get(dev, &pwr_dom);
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+ if (ret < 0)
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+ return ret;
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+
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+ ret = power_domain_on(&pwr_dom);
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+ if (ret < 0)
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+ return ret;
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+
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+ ret = power_domain_free(&pwr_dom);
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+ if (ret < 0)
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+ return ret;
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+#endif
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+
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+ /* perform reset */
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+ ret = reset_get_by_index(dev, 0, &rst_ctl);
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+ if (ret < 0)
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+ return ret;
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+
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+ ret = reset_deassert(&rst_ctl);
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+ if (ret < 0)
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+ return ret;
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+
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+ ret = reset_free(&rst_ctl);
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+ if (ret < 0)
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+ return ret;
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+
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+ /* enable usb_ref clock */
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+ ret = clk_get_by_name(dev, "usb_ref", &clk);
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+ if (!ret) {
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+ ret = clk_enable(&clk);
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+ if (ret < 0)
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+ return ret;
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+
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+ ret = clk_free(&clk);
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+ if (ret < 0)
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+ return ret;
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+ }
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+
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+ mdelay(100);
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+
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+ return 0;
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+}
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+
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+U_BOOT_DRIVER(bcm6368_usbh) = {
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+ .name = "bcm6368-usbh",
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+ .id = UCLASS_PHY,
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+ .of_match = bcm6368_usbh_ids,
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+ .ops = &bcm6368_usbh_ops,
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+ .priv_auto_alloc_size = sizeof(struct bcm6368_usbh_priv),
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+ .probe = bcm6368_usbh_probe,
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+};
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