1 // SPDX-License-Identifier: GPL-2.0
8  * Marvell CP110 UTMI PHY driver
13 #include <linux/mfd/syscon.h>
16 #include <linux/phy/phy.h>
81 #define PORT_REGS(p)				((p)->priv->regs + (p)->id * 0x1000)
84  * struct mvebu_cp110_utmi - PHY driver data
86  * @regs: PHY registers
87  * @syscon: Regmap with system controller registers
89  * @ops: phy ops
93 	struct regmap *syscon;  member
99  * struct mvebu_cp110_utmi_port - PHY port data
101  * @priv: PHY driver data
102  * @id: PHY port ID
103  * @dr_mode: PHY connection: USB_DR_MODE_HOST or USB_DR_MODE_PERIPHERAL
104  * @swap_dx: whether to swap d+/d- signals
159 	 * Set Control VDAT Reference Voltage - 0.325V and  in mvebu_cp110_utmi_port_setup()
160 	 * Control VSRC Reference Voltage - 0.6V  in mvebu_cp110_utmi_port_setup()
167 	/* Swap D+/D- */  in mvebu_cp110_utmi_port_setup()
170 	if (port->swap_dx)  in mvebu_cp110_utmi_port_setup()
175 static int mvebu_cp110_utmi_phy_power_off(struct phy *phy)  in mvebu_cp110_utmi_phy_power_off()  argument
177 	struct mvebu_cp110_utmi_port *port = phy_get_drvdata(phy);  in mvebu_cp110_utmi_phy_power_off()
178 	struct mvebu_cp110_utmi *utmi = port->priv;  in mvebu_cp110_utmi_phy_power_off()
181 	/* Power down UTMI PHY port */  in mvebu_cp110_utmi_phy_power_off()
182 	regmap_clear_bits(utmi->syscon, SYSCON_UTMI_CFG_REG(port->id),  in mvebu_cp110_utmi_phy_power_off()
186 		int test = regmap_test_bits(utmi->syscon,  in mvebu_cp110_utmi_phy_power_off()
189 		/* skip PLL shutdown if there are active UTMI PHY ports */  in mvebu_cp110_utmi_phy_power_off()
194 	/* PLL Power down if all UTMI PHYs are down */  in mvebu_cp110_utmi_phy_power_off()
195 	regmap_clear_bits(utmi->syscon, SYSCON_USB_CFG_REG, USB_CFG_PLL_MASK);  in mvebu_cp110_utmi_phy_power_off()
200 static int mvebu_cp110_utmi_phy_power_on(struct phy *phy)  in mvebu_cp110_utmi_phy_power_on()  argument
202 	struct mvebu_cp110_utmi_port *port = phy_get_drvdata(phy);  in mvebu_cp110_utmi_phy_power_on()
203 	struct mvebu_cp110_utmi *utmi = port->priv;  in mvebu_cp110_utmi_phy_power_on()
204 	struct device *dev = &phy->dev;  in mvebu_cp110_utmi_phy_power_on()
208 	/* It is necessary to power off UTMI before configuration */  in mvebu_cp110_utmi_phy_power_on()
209 	ret = mvebu_cp110_utmi_phy_power_off(phy);  in mvebu_cp110_utmi_phy_power_on()
211 		dev_err(dev, "UTMI power OFF before power ON failed\n");  in mvebu_cp110_utmi_phy_power_on()
217 	 * configure the USB MUX prior to UTMI PHY initialization.  in mvebu_cp110_utmi_phy_power_on()
219 	 * to UTMI0 or to UTMI1 PHY port, but not to both.  in mvebu_cp110_utmi_phy_power_on()
221 	if (port->dr_mode == USB_DR_MODE_PERIPHERAL) {  in mvebu_cp110_utmi_phy_power_on()
222 		regmap_update_bits(utmi->syscon, SYSCON_USB_CFG_REG,  in mvebu_cp110_utmi_phy_power_on()
225 				   (port->id << USB_CFG_DEVICE_MUX_OFFSET));  in mvebu_cp110_utmi_phy_power_on()
233 	/* Wait for UTMI power down */  in mvebu_cp110_utmi_phy_power_on()
236 	/* PHY port setup first */  in mvebu_cp110_utmi_phy_power_on()
239 	/* Power UP UTMI PHY */  in mvebu_cp110_utmi_phy_power_on()
240 	regmap_set_bits(utmi->syscon, SYSCON_UTMI_CFG_REG(port->id),  in mvebu_cp110_utmi_phy_power_on()
275 	/* PLL Power up */  in mvebu_cp110_utmi_phy_power_on()
276 	regmap_set_bits(utmi->syscon, SYSCON_USB_CFG_REG, USB_CFG_PLL_MASK);  in mvebu_cp110_utmi_phy_power_on()
288 	{ .compatible = "marvell,cp110-utmi-phy" },
295 	struct device *dev = &pdev->dev;  in mvebu_cp110_utmi_phy_probe()
304 		return -ENOMEM;  in mvebu_cp110_utmi_phy_probe()
306 	utmi->dev = dev;  in mvebu_cp110_utmi_phy_probe()
309 	utmi->syscon = syscon_regmap_lookup_by_phandle(dev->of_node,  in mvebu_cp110_utmi_phy_probe()
310 						       "marvell,system-controller");  in mvebu_cp110_utmi_phy_probe()
311 	if (IS_ERR(utmi->syscon)) {  in mvebu_cp110_utmi_phy_probe()
313 		return PTR_ERR(utmi->syscon);  in mvebu_cp110_utmi_phy_probe()
317 	utmi->regs = devm_platform_ioremap_resource(pdev, 0);  in mvebu_cp110_utmi_phy_probe()
318 	if (IS_ERR(utmi->regs))  in mvebu_cp110_utmi_phy_probe()
319 		return PTR_ERR(utmi->regs);  in mvebu_cp110_utmi_phy_probe()
321 	for_each_available_child_of_node(dev->of_node, child) {  in mvebu_cp110_utmi_phy_probe()
323 		struct phy *phy;  in mvebu_cp110_utmi_phy_probe()  local
338 			return -ENOMEM;  in mvebu_cp110_utmi_phy_probe()
341 		port->dr_mode = of_usb_get_dr_mode_by_phy(child, -1);  in mvebu_cp110_utmi_phy_probe()
342 		if ((port->dr_mode != USB_DR_MODE_HOST) &&  in mvebu_cp110_utmi_phy_probe()
343 		    (port->dr_mode != USB_DR_MODE_PERIPHERAL)) {  in mvebu_cp110_utmi_phy_probe()
344 			dev_err(&pdev->dev,  in mvebu_cp110_utmi_phy_probe()
347 			port->dr_mode = USB_DR_MODE_HOST;  in mvebu_cp110_utmi_phy_probe()
350 		if (port->dr_mode == USB_DR_MODE_PERIPHERAL) {  in mvebu_cp110_utmi_phy_probe()
356 				port->dr_mode = USB_DR_MODE_HOST;  in mvebu_cp110_utmi_phy_probe()
360 		of_property_for_each_u32(dev->of_node, "swap-dx-lanes", swap_dx)  in mvebu_cp110_utmi_phy_probe()
362 				port->swap_dx = 1;  in mvebu_cp110_utmi_phy_probe()
364 		/* Retrieve PHY capabilities */  in mvebu_cp110_utmi_phy_probe()
365 		utmi->ops = &mvebu_cp110_utmi_phy_ops;  in mvebu_cp110_utmi_phy_probe()
367 		/* Instantiate the PHY */  in mvebu_cp110_utmi_phy_probe()
368 		phy = devm_phy_create(dev, child, utmi->ops);  in mvebu_cp110_utmi_phy_probe()
369 		if (IS_ERR(phy)) {  in mvebu_cp110_utmi_phy_probe()
370 			dev_err(dev, "Failed to create the UTMI PHY\n");  in mvebu_cp110_utmi_phy_probe()
372 			return PTR_ERR(phy);  in mvebu_cp110_utmi_phy_probe()
375 		port->priv = utmi;  in mvebu_cp110_utmi_phy_probe()
376 		port->id = port_id;  in mvebu_cp110_utmi_phy_probe()
377 		phy_set_drvdata(phy, port);  in mvebu_cp110_utmi_phy_probe()
379 		/* Ensure the PHY is powered off */  in mvebu_cp110_utmi_phy_probe()
380 		mvebu_cp110_utmi_phy_power_off(phy);  in mvebu_cp110_utmi_phy_probe()
392 		.name		= "mvebu-cp110-utmi-phy",
399 MODULE_DESCRIPTION("Marvell Armada CP110 UTMI PHY driver");