| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Paul Cercueil | 1044 | 99.43% | 1 | 50.00% |
| Christophe Jaillet | 6 | 0.57% | 1 | 50.00% |
| Total | 1050 | 2 |
// SPDX-License-Identifier: GPL-2.0 /* * Ingenic JZ4770 USB PHY driver * Copyright (c) Paul Cercueil <paul@crapouillou.net> */ #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> #define REG_USBPCR_OFFSET 0x00 #define REG_USBRDT_OFFSET 0x04 #define REG_USBVBFIL_OFFSET 0x08 #define REG_USBPCR1_OFFSET 0x0c /* USBPCR */ #define USBPCR_USB_MODE BIT(31) #define USBPCR_AVLD_REG BIT(30) #define USBPCR_INCRM BIT(27) #define USBPCR_CLK12_EN BIT(26) #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 (3 << USBPCR_IDPULLUP_LSB) #define USBPCR_IDPULLUP_SUSPEND (1 << USBPCR_IDPULLUP_LSB) #define USBPCR_IDPULLUP_OTG (0 << USBPCR_IDPULLUP_LSB) #define USBPCR_COMPDISTUNE_LSB 17 #define USBPCR_COMPDISTUNE_MASK GENMASK(19, USBPCR_COMPDISTUNE_LSB) #define USBPCR_COMPDISTUNE_DFT 4 #define USBPCR_OTGTUNE_LSB 14 #define USBPCR_OTGTUNE_MASK GENMASK(16, USBPCR_OTGTUNE_LSB) #define USBPCR_OTGTUNE_DFT 4 #define USBPCR_SQRXTUNE_LSB 11 #define USBPCR_SQRXTUNE_MASK GENMASK(13, USBPCR_SQRXTUNE_LSB) #define USBPCR_SQRXTUNE_DFT 3 #define USBPCR_TXFSLSTUNE_LSB 7 #define USBPCR_TXFSLSTUNE_MASK GENMASK(10, USBPCR_TXFSLSTUNE_LSB) #define USBPCR_TXFSLSTUNE_DFT 3 #define USBPCR_TXRISETUNE_LSB 4 #define USBPCR_TXRISETUNE_MASK GENMASK(5, USBPCR_TXRISETUNE_LSB) #define USBPCR_TXRISETUNE_DFT 3 #define USBPCR_TXVREFTUNE_LSB 0 #define USBPCR_TXVREFTUNE_MASK GENMASK(3, USBPCR_TXVREFTUNE_LSB) #define USBPCR_TXVREFTUNE_DFT 5 /* USBRDT */ #define USBRDT_VBFIL_LD_EN BIT(25) #define USBRDT_IDDIG_EN BIT(24) #define USBRDT_IDDIG_REG BIT(23) #define USBRDT_USBRDT_LSB 0 #define USBRDT_USBRDT_MASK GENMASK(22, USBRDT_USBRDT_LSB) /* USBPCR1 */ #define USBPCR1_UHC_POWON BIT(5) struct jz4770_phy { 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 jz4770_phy_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget) { struct jz4770_phy *priv = otg_to_jz4770_phy(otg); u32 reg; 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 jz4770_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 jz4770_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; } reg = USBPCR_AVLD_REG | USBPCR_COMMONONN | USBPCR_IDPULLUP_ALWAYS | (USBPCR_COMPDISTUNE_DFT << USBPCR_COMPDISTUNE_LSB) | (USBPCR_OTGTUNE_DFT << USBPCR_OTGTUNE_LSB) | (USBPCR_SQRXTUNE_DFT << USBPCR_SQRXTUNE_LSB) | (USBPCR_TXFSLSTUNE_DFT << USBPCR_TXFSLSTUNE_LSB) | (USBPCR_TXRISETUNE_DFT << USBPCR_TXRISETUNE_LSB) | (USBPCR_TXVREFTUNE_DFT << USBPCR_TXVREFTUNE_LSB) | USBPCR_POR; writel(reg, priv->base + REG_USBPCR_OFFSET); /* Wait for PHY to reset */ usleep_range(30, 300); writel(reg & ~USBPCR_POR, priv->base + REG_USBPCR_OFFSET); usleep_range(300, 1000); return 0; } static void jz4770_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 jz4770_phy_remove(void *phy) { usb_remove_phy(phy); } 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; platform_set_drvdata(pdev, priv); priv->dev = dev; priv->phy.dev = dev; priv->phy.otg = &priv->otg; priv->phy.label = "jz4770-phy"; priv->phy.init = jz4770_phy_init; priv->phy.shutdown = jz4770_phy_shutdown; priv->otg.state = OTG_STATE_UNDEFINED; priv->otg.usb_phy = &priv->phy; priv->otg.set_host = jz4770_phy_set_host; priv->otg.set_peripheral = jz4770_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)) { err = PTR_ERR(priv->clk); if (err != -EPROBE_DEFER) dev_err(dev, "Failed to get clock\n"); return err; } priv->vcc_supply = devm_regulator_get(dev, "vcc"); if (IS_ERR(priv->vcc_supply)) { err = PTR_ERR(priv->vcc_supply); if (err != -EPROBE_DEFER) dev_err(dev, "Failed to get regulator\n"); return err; } err = usb_add_phy(&priv->phy, USB_PHY_TYPE_USB2); if (err) { if (err != -EPROBE_DEFER) dev_err(dev, "Unable to register PHY\n"); return err; } return devm_add_action_or_reset(dev, jz4770_phy_remove, &priv->phy); } #ifdef CONFIG_OF static const struct of_device_id jz4770_phy_of_matches[] = { { .compatible = "ingenic,jz4770-phy" }, { } }; MODULE_DEVICE_TABLE(of, jz4770_phy_of_matches); #endif static struct platform_driver jz4770_phy_driver = { .probe = jz4770_phy_probe, .driver = { .name = "jz4770-phy", .of_match_table = of_match_ptr(jz4770_phy_of_matches), }, }; module_platform_driver(jz4770_phy_driver); MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>"); MODULE_DESCRIPTION("Ingenic JZ4770 USB PHY driver"); MODULE_LICENSE("GPL");
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