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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>
163 lines
3.6 KiB
C
163 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Renesas RCar Gen3 USB PHY driver
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*
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* Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
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*/
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#include <common.h>
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#include <clk.h>
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#include <div64.h>
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#include <dm.h>
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#include <fdtdec.h>
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#include <generic-phy.h>
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#include <malloc.h>
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#include <reset.h>
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#include <syscon.h>
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#include <usb.h>
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#include <asm/io.h>
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#include <linux/bitops.h>
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#include <power/regulator.h>
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/* USB2.0 Host registers (original offset is +0x200) */
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#define USB2_INT_ENABLE 0x000
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#define USB2_USBCTR 0x00c
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#define USB2_SPD_RSM_TIMSET 0x10c
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#define USB2_OC_TIMSET 0x110
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#define USB2_COMMCTRL 0x600
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#define USB2_OBINTSTA 0x604
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#define USB2_OBINTEN 0x608
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#define USB2_VBCTRL 0x60c
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#define USB2_LINECTRL1 0x610
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#define USB2_ADPCTRL 0x630
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/* USBCTR */
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#define USB2_USBCTR_PLL_RST BIT(1)
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/* SPD_RSM_TIMSET */
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#define USB2_SPD_RSM_TIMSET_INIT 0x014e029b
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/* OC_TIMSET */
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#define USB2_OC_TIMSET_INIT 0x000209ab
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/* COMMCTRL */
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#define USB2_COMMCTRL_OTG_PERI BIT(31) /* 1 = Peripheral mode */
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/* LINECTRL1 */
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#define USB2_LINECTRL1_DP_RPD BIT(18)
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#define USB2_LINECTRL1_DM_RPD BIT(16)
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/* ADPCTRL */
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#define USB2_ADPCTRL_DRVVBUS BIT(4)
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struct rcar_gen3_phy {
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fdt_addr_t regs;
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struct clk clk;
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struct udevice *vbus_supply;
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};
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static int rcar_gen3_phy_phy_init(struct phy *phy)
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{
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struct rcar_gen3_phy *priv = dev_get_priv(phy->dev);
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/* Initialize USB2 part */
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writel(0, priv->regs + USB2_INT_ENABLE);
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writel(USB2_SPD_RSM_TIMSET_INIT, priv->regs + USB2_SPD_RSM_TIMSET);
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writel(USB2_OC_TIMSET_INIT, priv->regs + USB2_OC_TIMSET);
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setbits_le32(priv->regs + USB2_LINECTRL1,
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USB2_LINECTRL1_DP_RPD | USB2_LINECTRL1_DM_RPD);
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clrbits_le32(priv->regs + USB2_COMMCTRL, USB2_COMMCTRL_OTG_PERI);
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setbits_le32(priv->regs + USB2_ADPCTRL, USB2_ADPCTRL_DRVVBUS);
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return 0;
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}
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static int rcar_gen3_phy_phy_power_on(struct phy *phy)
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{
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struct rcar_gen3_phy *priv = dev_get_priv(phy->dev);
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int ret;
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if (priv->vbus_supply) {
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ret = regulator_set_enable(priv->vbus_supply, true);
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if (ret)
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return ret;
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}
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setbits_le32(priv->regs + USB2_USBCTR, USB2_USBCTR_PLL_RST);
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clrbits_le32(priv->regs + USB2_USBCTR, USB2_USBCTR_PLL_RST);
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return 0;
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}
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static int rcar_gen3_phy_phy_power_off(struct phy *phy)
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{
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struct rcar_gen3_phy *priv = dev_get_priv(phy->dev);
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if (!priv->vbus_supply)
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return 0;
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return regulator_set_enable(priv->vbus_supply, false);
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}
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static const struct phy_ops rcar_gen3_phy_phy_ops = {
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.init = rcar_gen3_phy_phy_init,
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.power_on = rcar_gen3_phy_phy_power_on,
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.power_off = rcar_gen3_phy_phy_power_off,
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};
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static int rcar_gen3_phy_probe(struct udevice *dev)
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{
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struct rcar_gen3_phy *priv = dev_get_priv(dev);
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int ret;
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priv->regs = dev_read_addr(dev);
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if (priv->regs == FDT_ADDR_T_NONE)
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return -EINVAL;
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ret = device_get_supply_regulator(dev, "vbus-supply",
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&priv->vbus_supply);
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if (ret && ret != -ENOENT) {
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pr_err("Failed to get PHY regulator\n");
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return ret;
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}
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/* Enable clock */
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ret = clk_get_by_index(dev, 0, &priv->clk);
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if (ret)
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return ret;
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ret = clk_enable(&priv->clk);
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if (ret)
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return ret;
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return 0;
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}
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static int rcar_gen3_phy_remove(struct udevice *dev)
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{
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struct rcar_gen3_phy *priv = dev_get_priv(dev);
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clk_disable(&priv->clk);
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clk_free(&priv->clk);
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return 0;
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}
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static const struct udevice_id rcar_gen3_phy_of_match[] = {
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{ .compatible = "renesas,rcar-gen3-usb2-phy", },
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{ },
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};
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U_BOOT_DRIVER(rcar_gen3_phy) = {
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.name = "rcar-gen3-phy",
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.id = UCLASS_PHY,
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.of_match = rcar_gen3_phy_of_match,
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.ops = &rcar_gen3_phy_phy_ops,
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.probe = rcar_gen3_phy_probe,
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.remove = rcar_gen3_phy_remove,
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.priv_auto = sizeof(struct rcar_gen3_phy),
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};
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