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https://github.com/brain-hackers/u-boot-brain
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41575d8e4c
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
144 lines
3.0 KiB
C
144 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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ret = clk_free(&clk);
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if (ret < 0)
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return ret;
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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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