1 // SPDX-License-Identifier: GPL-2.0
9  * Marvell A3700 UTMI PHY driver
17 #include <linux/phy/phy.h>
21 /* Armada 3700 UTMI PHY registers */
59  * struct mvebu_a3700_utmi_caps - PHY capabilities
61  * @usb32: Flag indicating which PHY is in use (impacts the register map):
62  *           - The UTMI PHY wired to the USB3/USB2 controller (otg)
63  *           - The UTMI PHY wired to the USB2 controller (host only)
64  * @ops: PHY operations
72  * struct mvebu_a3700_utmi - PHY driver data
74  * @regs: PHY registers
75  * @usb_misc: Regmap with USB miscellaneous registers including PHY ones
76  * @caps: PHY capabilities
77  * @phy: PHY handle
83 	struct phy *phy;  member
86 static int mvebu_a3700_utmi_phy_power_on(struct phy *phy)  in mvebu_a3700_utmi_phy_power_on()  argument
88 	struct mvebu_a3700_utmi *utmi = phy_get_drvdata(phy);  in mvebu_a3700_utmi_phy_power_on()
89 	struct device *dev = &phy->dev;  in mvebu_a3700_utmi_phy_power_on()
90 	int usb32 = utmi->caps->usb32;  in mvebu_a3700_utmi_phy_power_on()
98 	reg = readl(utmi->regs + USB2_PHY_PLL_CTRL_REG0);  in mvebu_a3700_utmi_phy_power_on()
102 	writel(reg, utmi->regs + USB2_PHY_PLL_CTRL_REG0);  in mvebu_a3700_utmi_phy_power_on()
104 	/* Enable PHY pull up and disable USB2 suspend */  in mvebu_a3700_utmi_phy_power_on()
105 	regmap_update_bits(utmi->usb_misc, USB2_PHY_CTRL(usb32),  in mvebu_a3700_utmi_phy_power_on()
111 		reg = readl(utmi->regs + USB2_PHY_OTG_CTRL);  in mvebu_a3700_utmi_phy_power_on()
113 		writel(reg, utmi->regs + USB2_PHY_OTG_CTRL);  in mvebu_a3700_utmi_phy_power_on()
115 		/* Disable PHY charger detection */  in mvebu_a3700_utmi_phy_power_on()
116 		reg = readl(utmi->regs + USB2_PHY_CHRGR_DETECT);  in mvebu_a3700_utmi_phy_power_on()
119 		writel(reg, utmi->regs + USB2_PHY_CHRGR_DETECT);  in mvebu_a3700_utmi_phy_power_on()
121 		/* Disable PHY DP/DM pull-down (used for device mode) */  in mvebu_a3700_utmi_phy_power_on()
122 		regmap_update_bits(utmi->usb_misc, USB2_PHY_CTRL(usb32),  in mvebu_a3700_utmi_phy_power_on()
128 	ret = readl_poll_timeout(utmi->regs + USB2_PHY_CAL_CTRL, reg,  in mvebu_a3700_utmi_phy_power_on()
132 		dev_err(dev, "Failed to end USB2 PLL calibration\n");  in mvebu_a3700_utmi_phy_power_on()
137 	ret = readl_poll_timeout(utmi->regs + USB2_PHY_CAL_CTRL, reg,  in mvebu_a3700_utmi_phy_power_on()
141 		dev_err(dev, "Failed to end USB2 impedance calibration\n");  in mvebu_a3700_utmi_phy_power_on()
146 	ret = readl_poll_timeout(utmi->regs + USB2_RX_CHAN_CTRL1, reg,  in mvebu_a3700_utmi_phy_power_on()
150 		dev_err(dev, "Failed to end USB2 unknown calibration\n");  in mvebu_a3700_utmi_phy_power_on()
155 	ret = readl_poll_timeout(utmi->regs + USB2_PHY_PLL_CTRL_REG0, reg,  in mvebu_a3700_utmi_phy_power_on()
159 		dev_err(dev, "Failed to lock USB2 PLL\n");  in mvebu_a3700_utmi_phy_power_on()
164 static int mvebu_a3700_utmi_phy_power_off(struct phy *phy)  in mvebu_a3700_utmi_phy_power_off()  argument
166 	struct mvebu_a3700_utmi *utmi = phy_get_drvdata(phy);  in mvebu_a3700_utmi_phy_power_off()
167 	int usb32 = utmi->caps->usb32;  in mvebu_a3700_utmi_phy_power_off()
170 	/* Disable PHY pull-up and enable USB2 suspend */  in mvebu_a3700_utmi_phy_power_off()
171 	reg = readl(utmi->regs + USB2_PHY_CTRL(usb32));  in mvebu_a3700_utmi_phy_power_off()
173 	writel(reg, utmi->regs + USB2_PHY_CTRL(usb32));  in mvebu_a3700_utmi_phy_power_off()
177 		reg = readl(utmi->regs + USB2_PHY_OTG_CTRL);  in mvebu_a3700_utmi_phy_power_off()
179 		writel(reg, utmi->regs + USB2_PHY_OTG_CTRL);  in mvebu_a3700_utmi_phy_power_off()
203 		.compatible = "marvell,a3700-utmi-otg-phy",
207 		.compatible = "marvell,a3700-utmi-host-phy",
216 	struct device *dev = &pdev->dev;  in mvebu_a3700_utmi_phy_probe()
222 		return -ENOMEM;  in mvebu_a3700_utmi_phy_probe()
225 	utmi->regs = devm_platform_ioremap_resource(pdev, 0);  in mvebu_a3700_utmi_phy_probe()
226 	if (IS_ERR(utmi->regs))  in mvebu_a3700_utmi_phy_probe()
227 		return PTR_ERR(utmi->regs);  in mvebu_a3700_utmi_phy_probe()
229 	/* Get miscellaneous Host/PHY region */  in mvebu_a3700_utmi_phy_probe()
230 	utmi->usb_misc = syscon_regmap_lookup_by_phandle(dev->of_node,  in mvebu_a3700_utmi_phy_probe()
231 							 "marvell,usb-misc-reg");  in mvebu_a3700_utmi_phy_probe()
232 	if (IS_ERR(utmi->usb_misc)) {  in mvebu_a3700_utmi_phy_probe()
235 		return PTR_ERR(utmi->usb_misc);  in mvebu_a3700_utmi_phy_probe()
238 	/* Retrieve PHY capabilities */  in mvebu_a3700_utmi_phy_probe()
239 	utmi->caps = of_device_get_match_data(dev);  in mvebu_a3700_utmi_phy_probe()
241 	/* Instantiate the PHY */  in mvebu_a3700_utmi_phy_probe()
242 	utmi->phy = devm_phy_create(dev, NULL, utmi->caps->ops);  in mvebu_a3700_utmi_phy_probe()
243 	if (IS_ERR(utmi->phy)) {  in mvebu_a3700_utmi_phy_probe()
244 		dev_err(dev, "Failed to create the UTMI PHY\n");  in mvebu_a3700_utmi_phy_probe()
245 		return PTR_ERR(utmi->phy);  in mvebu_a3700_utmi_phy_probe()
248 	phy_set_drvdata(utmi->phy, utmi);  in mvebu_a3700_utmi_phy_probe()
250 	/* Ensure the PHY is powered off */  in mvebu_a3700_utmi_phy_probe()
251 	utmi->caps->ops->power_off(utmi->phy);  in mvebu_a3700_utmi_phy_probe()
261 		.name		= "mvebu-a3700-utmi-phy",
269 MODULE_DESCRIPTION("Marvell EBU A3700 UTMI PHY driver");