+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Ingenic SoCs USB PHY driver
- * Copyright (c) Paul Cercueil <paul@crapouillou.net>
- * Copyright (c) 漆鹏振 (Qi Pengzhen) <aric.pzqi@ingenic.com>
- * Copyright (c) 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
- */
-
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/regulator/consumer.h>
-#include <linux/usb/otg.h>
-#include <linux/usb/phy.h>
-
-/* OTGPHY register offsets */
-#define REG_USBPCR_OFFSET 0x00
-#define REG_USBRDT_OFFSET 0x04
-#define REG_USBVBFIL_OFFSET 0x08
-#define REG_USBPCR1_OFFSET 0x0c
-
-/* bits within the USBPCR register */
-#define USBPCR_USB_MODE BIT(31)
-#define USBPCR_AVLD_REG BIT(30)
-#define USBPCR_COMMONONN BIT(25)
-#define USBPCR_VBUSVLDEXT BIT(24)
-#define USBPCR_VBUSVLDEXTSEL BIT(23)
-#define USBPCR_POR BIT(22)
-#define USBPCR_SIDDQ BIT(21)
-#define USBPCR_OTG_DISABLE BIT(20)
-#define USBPCR_TXPREEMPHTUNE BIT(6)
-
-#define USBPCR_IDPULLUP_LSB 28
-#define USBPCR_IDPULLUP_MASK GENMASK(29, USBPCR_IDPULLUP_LSB)
-#define USBPCR_IDPULLUP_ALWAYS (0x2 << USBPCR_IDPULLUP_LSB)
-#define USBPCR_IDPULLUP_SUSPEND (0x1 << USBPCR_IDPULLUP_LSB)
-#define USBPCR_IDPULLUP_OTG (0x0 << USBPCR_IDPULLUP_LSB)
-
-#define USBPCR_COMPDISTUNE_LSB 17
-#define USBPCR_COMPDISTUNE_MASK GENMASK(19, USBPCR_COMPDISTUNE_LSB)
-#define USBPCR_COMPDISTUNE_DFT (0x4 << USBPCR_COMPDISTUNE_LSB)
-
-#define USBPCR_OTGTUNE_LSB 14
-#define USBPCR_OTGTUNE_MASK GENMASK(16, USBPCR_OTGTUNE_LSB)
-#define USBPCR_OTGTUNE_DFT (0x4 << USBPCR_OTGTUNE_LSB)
-
-#define USBPCR_SQRXTUNE_LSB 11
-#define USBPCR_SQRXTUNE_MASK GENMASK(13, USBPCR_SQRXTUNE_LSB)
-#define USBPCR_SQRXTUNE_DCR_20PCT (0x7 << USBPCR_SQRXTUNE_LSB)
-#define USBPCR_SQRXTUNE_DFT (0x3 << USBPCR_SQRXTUNE_LSB)
-
-#define USBPCR_TXFSLSTUNE_LSB 7
-#define USBPCR_TXFSLSTUNE_MASK GENMASK(10, USBPCR_TXFSLSTUNE_LSB)
-#define USBPCR_TXFSLSTUNE_DCR_50PPT (0xf << USBPCR_TXFSLSTUNE_LSB)
-#define USBPCR_TXFSLSTUNE_DCR_25PPT (0x7 << USBPCR_TXFSLSTUNE_LSB)
-#define USBPCR_TXFSLSTUNE_DFT (0x3 << USBPCR_TXFSLSTUNE_LSB)
-#define USBPCR_TXFSLSTUNE_INC_25PPT (0x1 << USBPCR_TXFSLSTUNE_LSB)
-#define USBPCR_TXFSLSTUNE_INC_50PPT (0x0 << USBPCR_TXFSLSTUNE_LSB)
-
-#define USBPCR_TXHSXVTUNE_LSB 4
-#define USBPCR_TXHSXVTUNE_MASK GENMASK(5, USBPCR_TXHSXVTUNE_LSB)
-#define USBPCR_TXHSXVTUNE_DFT (0x3 << USBPCR_TXHSXVTUNE_LSB)
-#define USBPCR_TXHSXVTUNE_DCR_15MV (0x1 << USBPCR_TXHSXVTUNE_LSB)
-
-#define USBPCR_TXRISETUNE_LSB 4
-#define USBPCR_TXRISETUNE_MASK GENMASK(5, USBPCR_TXRISETUNE_LSB)
-#define USBPCR_TXRISETUNE_DFT (0x3 << USBPCR_TXRISETUNE_LSB)
-
-#define USBPCR_TXVREFTUNE_LSB 0
-#define USBPCR_TXVREFTUNE_MASK GENMASK(3, USBPCR_TXVREFTUNE_LSB)
-#define USBPCR_TXVREFTUNE_INC_25PPT (0x7 << USBPCR_TXVREFTUNE_LSB)
-#define USBPCR_TXVREFTUNE_DFT (0x5 << USBPCR_TXVREFTUNE_LSB)
-
-/* bits within the USBRDTR register */
-#define USBRDT_UTMI_RST BIT(27)
-#define USBRDT_HB_MASK BIT(26)
-#define USBRDT_VBFIL_LD_EN BIT(25)
-#define USBRDT_IDDIG_EN BIT(24)
-#define USBRDT_IDDIG_REG BIT(23)
-#define USBRDT_VBFIL_EN BIT(2)
-
-/* bits within the USBPCR1 register */
-#define USBPCR1_BVLD_REG BIT(31)
-#define USBPCR1_DPPD BIT(29)
-#define USBPCR1_DMPD BIT(28)
-#define USBPCR1_USB_SEL BIT(28)
-#define USBPCR1_WORD_IF_16BIT BIT(19)
-
-enum ingenic_usb_phy_version {
- ID_JZ4770,
- ID_JZ4780,
- ID_X1000,
- ID_X1830,
-};
-
-struct ingenic_soc_info {
- enum ingenic_usb_phy_version version;
-
- void (*usb_phy_init)(struct usb_phy *phy);
-};
-
-struct jz4770_phy {
- const struct ingenic_soc_info *soc_info;
-
- struct usb_phy phy;
- struct usb_otg otg;
- struct device *dev;
- void __iomem *base;
- struct clk *clk;
- struct regulator *vcc_supply;
-};
-
-static inline struct jz4770_phy *otg_to_jz4770_phy(struct usb_otg *otg)
-{
- return container_of(otg, struct jz4770_phy, otg);
-}
-
-static inline struct jz4770_phy *phy_to_jz4770_phy(struct usb_phy *phy)
-{
- return container_of(phy, struct jz4770_phy, phy);
-}
-
-static int ingenic_usb_phy_set_peripheral(struct usb_otg *otg,
- struct usb_gadget *gadget)
-{
- struct jz4770_phy *priv = otg_to_jz4770_phy(otg);
- u32 reg;
-
- if (priv->soc_info->version >= ID_X1000) {
- reg = readl(priv->base + REG_USBPCR1_OFFSET);
- reg |= USBPCR1_BVLD_REG;
- writel(reg, priv->base + REG_USBPCR1_OFFSET);
- }
-
- reg = readl(priv->base + REG_USBPCR_OFFSET);
- reg &= ~USBPCR_USB_MODE;
- reg |= USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | USBPCR_OTG_DISABLE;
- writel(reg, priv->base + REG_USBPCR_OFFSET);
-
- return 0;
-}
-
-static int ingenic_usb_phy_set_host(struct usb_otg *otg, struct usb_bus *host)
-{
- struct jz4770_phy *priv = otg_to_jz4770_phy(otg);
- u32 reg;
-
- reg = readl(priv->base + REG_USBPCR_OFFSET);
- reg &= ~(USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | USBPCR_OTG_DISABLE);
- reg |= USBPCR_USB_MODE;
- writel(reg, priv->base + REG_USBPCR_OFFSET);
-
- return 0;
-}
-
-static int ingenic_usb_phy_init(struct usb_phy *phy)
-{
- struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
- int err;
- u32 reg;
-
- err = regulator_enable(priv->vcc_supply);
- if (err) {
- dev_err(priv->dev, "Unable to enable VCC: %d\n", err);
- return err;
- }
-
- err = clk_prepare_enable(priv->clk);
- if (err) {
- dev_err(priv->dev, "Unable to start clock: %d\n", err);
- return err;
- }
-
- priv->soc_info->usb_phy_init(phy);
-
- /* Wait for PHY to reset */
- usleep_range(30, 300);
- reg = readl(priv->base + REG_USBPCR_OFFSET);
- writel(reg & ~USBPCR_POR, priv->base + REG_USBPCR_OFFSET);
- usleep_range(300, 1000);
-
- return 0;
-}
-
-static void ingenic_usb_phy_shutdown(struct usb_phy *phy)
-{
- struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
-
- clk_disable_unprepare(priv->clk);
- regulator_disable(priv->vcc_supply);
-}
-
-static void ingenic_usb_phy_remove(void *phy)
-{
- usb_remove_phy(phy);
-}
-
-static void jz4770_usb_phy_init(struct usb_phy *phy)
-{
- struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
- u32 reg;
-
- reg = USBPCR_AVLD_REG | USBPCR_COMMONONN | USBPCR_IDPULLUP_ALWAYS |
- USBPCR_COMPDISTUNE_DFT | USBPCR_OTGTUNE_DFT | USBPCR_SQRXTUNE_DFT |
- USBPCR_TXFSLSTUNE_DFT | USBPCR_TXRISETUNE_DFT | USBPCR_TXVREFTUNE_DFT |
- USBPCR_POR;
- writel(reg, priv->base + REG_USBPCR_OFFSET);
-}
-
-static void jz4780_usb_phy_init(struct usb_phy *phy)
-{
- struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
- u32 reg;
-
- reg = readl(priv->base + REG_USBPCR1_OFFSET) | USBPCR1_USB_SEL |
- USBPCR1_WORD_IF_16BIT;
- writel(reg, priv->base + REG_USBPCR1_OFFSET);
-
- reg = USBPCR_TXPREEMPHTUNE | USBPCR_COMMONONN | USBPCR_POR;
- writel(reg, priv->base + REG_USBPCR_OFFSET);
-}
-
-static void x1000_usb_phy_init(struct usb_phy *phy)
-{
- struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
- u32 reg;
-
- reg = readl(priv->base + REG_USBPCR1_OFFSET) | USBPCR1_WORD_IF_16BIT;
- writel(reg, priv->base + REG_USBPCR1_OFFSET);
-
- reg = USBPCR_SQRXTUNE_DCR_20PCT | USBPCR_TXPREEMPHTUNE |
- USBPCR_TXHSXVTUNE_DCR_15MV | USBPCR_TXVREFTUNE_INC_25PPT |
- USBPCR_COMMONONN | USBPCR_POR;
- writel(reg, priv->base + REG_USBPCR_OFFSET);
-}
-
-static void x1830_usb_phy_init(struct usb_phy *phy)
-{
- struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
- u32 reg;
-
- /* rdt */
- writel(USBRDT_VBFIL_EN | USBRDT_UTMI_RST, priv->base + REG_USBRDT_OFFSET);
-
- reg = readl(priv->base + REG_USBPCR1_OFFSET) | USBPCR1_WORD_IF_16BIT |
- USBPCR1_DMPD | USBPCR1_DPPD;
- writel(reg, priv->base + REG_USBPCR1_OFFSET);
-
- reg = USBPCR_IDPULLUP_OTG | USBPCR_VBUSVLDEXT | USBPCR_TXPREEMPHTUNE |
- USBPCR_COMMONONN | USBPCR_POR;
- writel(reg, priv->base + REG_USBPCR_OFFSET);
-}
-
-static const struct ingenic_soc_info jz4770_soc_info = {
- .version = ID_JZ4770,
-
- .usb_phy_init = jz4770_usb_phy_init,
-};
-
-static const struct ingenic_soc_info jz4780_soc_info = {
- .version = ID_JZ4780,
-
- .usb_phy_init = jz4780_usb_phy_init,
-};
-
-static const struct ingenic_soc_info x1000_soc_info = {
- .version = ID_X1000,
-
- .usb_phy_init = x1000_usb_phy_init,
-};
-
-static const struct ingenic_soc_info x1830_soc_info = {
- .version = ID_X1830,
-
- .usb_phy_init = x1830_usb_phy_init,
-};
-
-static const struct of_device_id ingenic_usb_phy_of_matches[] = {
- { .compatible = "ingenic,jz4770-phy", .data = &jz4770_soc_info },
- { .compatible = "ingenic,jz4780-phy", .data = &jz4780_soc_info },
- { .compatible = "ingenic,x1000-phy", .data = &x1000_soc_info },
- { .compatible = "ingenic,x1830-phy", .data = &x1830_soc_info },
- { /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, ingenic_usb_phy_of_matches);
-
-static int jz4770_phy_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct jz4770_phy *priv;
- int err;
-
- priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
-
- priv->soc_info = device_get_match_data(&pdev->dev);
- if (!priv->soc_info) {
- dev_err(&pdev->dev, "Error: No device match found\n");
- return -ENODEV;
- }
-
- platform_set_drvdata(pdev, priv);
- priv->dev = dev;
- priv->phy.dev = dev;
- priv->phy.otg = &priv->otg;
- priv->phy.label = "ingenic-usb-phy";
- priv->phy.init = ingenic_usb_phy_init;
- priv->phy.shutdown = ingenic_usb_phy_shutdown;
-
- priv->otg.state = OTG_STATE_UNDEFINED;
- priv->otg.usb_phy = &priv->phy;
- priv->otg.set_host = ingenic_usb_phy_set_host;
- priv->otg.set_peripheral = ingenic_usb_phy_set_peripheral;
-
- priv->base = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(priv->base)) {
- dev_err(dev, "Failed to map registers\n");
- return PTR_ERR(priv->base);
- }
-
- priv->clk = devm_clk_get(dev, NULL);
- if (IS_ERR(priv->clk))
- return dev_err_probe(dev, PTR_ERR(priv->clk),
- "Failed to get clock\n");
-
- priv->vcc_supply = devm_regulator_get(dev, "vcc");
- if (IS_ERR(priv->vcc_supply))
- return dev_err_probe(dev, PTR_ERR(priv->vcc_supply),
- "Failed to get regulator\n");
-
- err = usb_add_phy(&priv->phy, USB_PHY_TYPE_USB2);
- if (err)
- return dev_err_probe(dev, err, "Unable to register PHY\n");
-
- return devm_add_action_or_reset(dev, ingenic_usb_phy_remove, &priv->phy);
-}
-
-static struct platform_driver ingenic_phy_driver = {
- .probe = jz4770_phy_probe,
- .driver = {
- .name = "jz4770-phy",
- .of_match_table = ingenic_usb_phy_of_matches,
- },
-};
-module_platform_driver(ingenic_phy_driver);
-
-MODULE_AUTHOR("周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>");
-MODULE_AUTHOR("漆鹏振 (Qi Pengzhen) <aric.pzqi@ingenic.com>");
-MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
-MODULE_DESCRIPTION("Ingenic SoCs USB PHY driver");
-MODULE_LICENSE("GPL");
projects / platform / kernel / linux-starfive.git / commitdiff