1 // SPDX-License-Identifier: GPL-2.0
3 * Renesas RCar Gen3 USB PHY driver
5 * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
13 #include <generic-phy.h>
18 #include <linux/bitops.h>
19 #include <power/regulator.h>
21 /* USB2.0 Host registers (original offset is +0x200) */
22 #define USB2_INT_ENABLE 0x000
23 #define USB2_USBCTR 0x00c
24 #define USB2_SPD_RSM_TIMSET 0x10c
25 #define USB2_OC_TIMSET 0x110
26 #define USB2_COMMCTRL 0x600
27 #define USB2_OBINTSTA 0x604
28 #define USB2_OBINTEN 0x608
29 #define USB2_VBCTRL 0x60c
30 #define USB2_LINECTRL1 0x610
31 #define USB2_ADPCTRL 0x630
34 #define USB2_USBCTR_PLL_RST BIT(1)
37 #define USB2_SPD_RSM_TIMSET_INIT 0x014e029b
40 #define USB2_OC_TIMSET_INIT 0x000209ab
43 #define USB2_COMMCTRL_OTG_PERI BIT(31) /* 1 = Peripheral mode */
46 #define USB2_LINECTRL1_DP_RPD BIT(18)
47 #define USB2_LINECTRL1_DM_RPD BIT(16)
50 #define USB2_ADPCTRL_DRVVBUS BIT(4)
52 struct rcar_gen3_phy {
55 struct udevice *vbus_supply;
58 static int rcar_gen3_phy_phy_init(struct phy *phy)
60 struct rcar_gen3_phy *priv = dev_get_priv(phy->dev);
62 /* Initialize USB2 part */
63 writel(0, priv->regs + USB2_INT_ENABLE);
64 writel(USB2_SPD_RSM_TIMSET_INIT, priv->regs + USB2_SPD_RSM_TIMSET);
65 writel(USB2_OC_TIMSET_INIT, priv->regs + USB2_OC_TIMSET);
67 setbits_le32(priv->regs + USB2_LINECTRL1,
68 USB2_LINECTRL1_DP_RPD | USB2_LINECTRL1_DM_RPD);
70 clrbits_le32(priv->regs + USB2_COMMCTRL, USB2_COMMCTRL_OTG_PERI);
72 setbits_le32(priv->regs + USB2_ADPCTRL, USB2_ADPCTRL_DRVVBUS);
77 static int rcar_gen3_phy_phy_power_on(struct phy *phy)
79 struct rcar_gen3_phy *priv = dev_get_priv(phy->dev);
82 if (priv->vbus_supply) {
83 ret = regulator_set_enable(priv->vbus_supply, true);
88 setbits_le32(priv->regs + USB2_USBCTR, USB2_USBCTR_PLL_RST);
89 clrbits_le32(priv->regs + USB2_USBCTR, USB2_USBCTR_PLL_RST);
94 static int rcar_gen3_phy_phy_power_off(struct phy *phy)
96 struct rcar_gen3_phy *priv = dev_get_priv(phy->dev);
98 if (!priv->vbus_supply)
101 return regulator_set_enable(priv->vbus_supply, false);
104 static const struct phy_ops rcar_gen3_phy_phy_ops = {
105 .init = rcar_gen3_phy_phy_init,
106 .power_on = rcar_gen3_phy_phy_power_on,
107 .power_off = rcar_gen3_phy_phy_power_off,
110 static int rcar_gen3_phy_probe(struct udevice *dev)
112 struct rcar_gen3_phy *priv = dev_get_priv(dev);
115 priv->regs = dev_read_addr(dev);
116 if (priv->regs == FDT_ADDR_T_NONE)
119 ret = device_get_supply_regulator(dev, "vbus-supply",
121 if (ret && ret != -ENOENT) {
122 pr_err("Failed to get PHY regulator\n");
127 ret = clk_get_by_index(dev, 0, &priv->clk);
131 ret = clk_enable(&priv->clk);
138 static int rcar_gen3_phy_remove(struct udevice *dev)
140 struct rcar_gen3_phy *priv = dev_get_priv(dev);
142 clk_disable(&priv->clk);
143 clk_free(&priv->clk);
148 static const struct udevice_id rcar_gen3_phy_of_match[] = {
149 { .compatible = "renesas,rcar-gen3-usb2-phy", },
153 U_BOOT_DRIVER(rcar_gen3_phy) = {
154 .name = "rcar-gen3-phy",
156 .of_match = rcar_gen3_phy_of_match,
157 .ops = &rcar_gen3_phy_phy_ops,
158 .probe = rcar_gen3_phy_probe,
159 .remove = rcar_gen3_phy_remove,
160 .priv_auto_alloc_size = sizeof(struct rcar_gen3_phy),