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ad20358c74
This function always succeeds, so don't check its return value. Signed-off-by: Sean Anderson <seanga2@gmail.com> Link: https://lore.kernel.org/r/20220115222504.617013-5-seanga2@gmail.com
142 lines
3.0 KiB
C
142 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018 Álvaro 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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#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 <log.h>
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#include <malloc.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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#include <linux/bitops.h>
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#include <linux/delay.h>
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/* USBH Setup register */
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#define USBH_SETUP_REG 0x00
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#define USBH_SETUP_IOC BIT(4)
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/* USBH PLL Control register */
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#define USBH_PLL_REG 0x04
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#define USBH_PLL_SUSP_EN BIT(27)
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#define USBH_PLL_IDDQ_PWRDN BIT(31)
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/* USBH Swap Control register */
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#define USBH_SWAP_REG 0x0c
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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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/* USBH Sim Control register */
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#define USBH_SIM_REG 0x20
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#define USBH_SIM_LADDR BIT(5)
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struct bcm6318_usbh_priv {
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void __iomem *regs;
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};
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static int bcm6318_usbh_init(struct phy *phy)
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{
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struct bcm6318_usbh_priv *priv = dev_get_priv(phy->dev);
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/* enable pll control susp */
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setbits_be32(priv->regs + USBH_PLL_REG, USBH_PLL_SUSP_EN);
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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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/* setup config */
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setbits_be32(priv->regs + USBH_SETUP_REG, USBH_SETUP_IOC);
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/* disable pll control pwrdn */
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clrbits_be32(priv->regs + USBH_PLL_REG, USBH_PLL_IDDQ_PWRDN);
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/* sim control config */
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setbits_be32(priv->regs + USBH_SIM_REG, USBH_SIM_LADDR);
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return 0;
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}
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static struct phy_ops bcm6318_usbh_ops = {
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.init = bcm6318_usbh_init,
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};
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static const struct udevice_id bcm6318_usbh_ids[] = {
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{ .compatible = "brcm,bcm6318-usbh" },
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{ /* sentinel */ }
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};
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static int bcm6318_usbh_probe(struct udevice *dev)
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{
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struct bcm6318_usbh_priv *priv = dev_get_priv(dev);
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struct power_domain pwr_dom;
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struct reset_ctl rst_ctl;
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struct clk clk;
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int ret;
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priv->regs = dev_remap_addr(dev);
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if (!priv->regs)
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return -EINVAL;
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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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ret = clk_enable(&clk);
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if (ret < 0)
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return ret;
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clk_free(&clk);
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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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ret = power_domain_on(&pwr_dom);
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if (ret < 0)
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return ret;
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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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/* 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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ret = reset_deassert(&rst_ctl);
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if (ret < 0)
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return ret;
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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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mdelay(100);
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return 0;
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}
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U_BOOT_DRIVER(bcm6318_usbh) = {
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.name = "bcm6318-usbh",
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.id = UCLASS_PHY,
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.of_match = bcm6318_usbh_ids,
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.ops = &bcm6318_usbh_ops,
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.priv_auto = sizeof(struct bcm6318_usbh_priv),
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.probe = bcm6318_usbh_probe,
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};
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