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![Simon Glass](/assets/img/avatar_default.png)
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>
197 lines
4.1 KiB
C
197 lines
4.1 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 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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/* 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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/* 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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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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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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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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/* 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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if (hw->setup_clr)
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clrbits_be32(priv->regs + USBH_SETUP_REG, hw->setup_clr);
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setbits_be32(priv->regs + USBH_SETUP_REG, USBH_SETUP_IOC);
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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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return 0;
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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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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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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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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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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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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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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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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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priv->hw = hw;
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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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#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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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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#endif
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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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/* 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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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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mdelay(100);
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return 0;
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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 = sizeof(struct bcm6368_usbh_priv),
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.probe = bcm6368_usbh_probe,
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};
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