1 // SPDX-License-Identifier: GPL-2.0+
3  * Salvo PHY is a 28nm PHY, it is a legacy PHY, and only
6  * Copyright (c) 2019-2020 NXP
13 #include <linux/phy/phy.h>
21 /* USB3 PHY register definition */
93 /* USB2 PHY register definition */
135 	struct phy *phy;  member
147 	return salvo_phy->data == &cdns_nxp_salvo_data;  in cdns_is_nxp_phy()
152 	return (u16)readl(salvo_phy->base + offset +  in cdns_salvo_read()
153 		reg * (1 << salvo_phy->data->reg_offset_shift));  in cdns_salvo_read()
159 	writel(val, salvo_phy->base + offset +  in cdns_salvo_write()
160 		reg * (1 << salvo_phy->data->reg_offset_shift));  in cdns_salvo_write()
164  * Below bringup sequence pair are from Cadence PHY's User Guide
246 static int cdns_salvo_phy_init(struct phy *phy)  in cdns_salvo_phy_init()  argument
248 	struct cdns_salvo_phy *salvo_phy = phy_get_drvdata(phy);  in cdns_salvo_phy_init()
249 	struct cdns_salvo_data *data = salvo_phy->data;  in cdns_salvo_phy_init()
253 	ret = clk_prepare_enable(salvo_phy->clk);  in cdns_salvo_phy_init()
257 	for (i = 0; i < data->init_sequence_length; i++) {  in cdns_salvo_phy_init()
258 		const struct cdns_reg_pairs *reg_pair = data->init_sequence_val + i;  in cdns_salvo_phy_init()
260 		cdns_salvo_write(salvo_phy, USB3_PHY_OFFSET, reg_pair->off, reg_pair->val);  in cdns_salvo_phy_init()
278 	value = FIELD_PREP(RX_USB2_DISCONN_MASK, salvo_phy->usb2_disconn);  in cdns_salvo_phy_init()
283 	clk_disable_unprepare(salvo_phy->clk);  in cdns_salvo_phy_init()
288 static int cdns_salvo_phy_power_on(struct phy *phy)  in cdns_salvo_phy_power_on()  argument
290 	struct cdns_salvo_phy *salvo_phy = phy_get_drvdata(phy);  in cdns_salvo_phy_power_on()
292 	return clk_prepare_enable(salvo_phy->clk);  in cdns_salvo_phy_power_on()
295 static int cdns_salvo_phy_power_off(struct phy *phy)  in cdns_salvo_phy_power_off()  argument
297 	struct cdns_salvo_phy *salvo_phy = phy_get_drvdata(phy);  in cdns_salvo_phy_power_off()
299 	clk_disable_unprepare(salvo_phy->clk);  in cdns_salvo_phy_power_off()
304 static int cdns_salvo_set_mode(struct phy *phy, enum phy_mode mode, int submode)  in cdns_salvo_set_mode()  argument
306 	struct cdns_salvo_phy *salvo_phy = phy_get_drvdata(phy);  in cdns_salvo_set_mode()
332 	struct device *dev = &pdev->dev;  in cdns_salvo_phy_probe()
340 		return -ENOMEM;  in cdns_salvo_phy_probe()
342 	salvo_phy->data = data;  in cdns_salvo_phy_probe()
343 	salvo_phy->clk = devm_clk_get_optional(dev, "salvo_phy_clk");  in cdns_salvo_phy_probe()
344 	if (IS_ERR(salvo_phy->clk))  in cdns_salvo_phy_probe()
345 		return PTR_ERR(salvo_phy->clk);  in cdns_salvo_phy_probe()
347 	if (of_property_read_u32(dev->of_node, "cdns,usb2-disconnect-threshold-microvolt", &val))  in cdns_salvo_phy_probe()
351 		salvo_phy->usb2_disconn = USB2_DISCONN_THRESHOLD_575;  in cdns_salvo_phy_probe()
353 		salvo_phy->usb2_disconn = USB2_DISCONN_THRESHOLD_610;  in cdns_salvo_phy_probe()
355 		salvo_phy->usb2_disconn = USB2_DISCONN_THRESHOLD_645;  in cdns_salvo_phy_probe()
357 	salvo_phy->base = devm_platform_ioremap_resource(pdev, 0);  in cdns_salvo_phy_probe()
358 	if (IS_ERR(salvo_phy->base))  in cdns_salvo_phy_probe()
359 		return PTR_ERR(salvo_phy->base);  in cdns_salvo_phy_probe()
361 	salvo_phy->phy = devm_phy_create(dev, NULL, &cdns_salvo_phy_ops);  in cdns_salvo_phy_probe()
362 	if (IS_ERR(salvo_phy->phy))  in cdns_salvo_phy_probe()
363 		return PTR_ERR(salvo_phy->phy);  in cdns_salvo_phy_probe()
365 	phy_set_drvdata(salvo_phy->phy, salvo_phy);  in cdns_salvo_phy_probe()
379 		.compatible = "nxp,salvo-phy",
389 		.name	= "cdns-salvo-phy",
397 MODULE_DESCRIPTION("Cadence SALVO PHY Driver");