1 // SPDX-License-Identifier: GPL-2.0
3  * Renesas R-Car Gen2 PHY driver
21 #define USBHS_LPSTS			0x02
22 #define USBHS_UGCTRL			0x80
23 #define USBHS_UGCTRL2			0x84
24 #define USBHS_UGSTS			0x88	/* From technical update */
27 #define USBHS_LPSTS_SUSPM		0x4000
30 #define USBHS_UGCTRL_CONNECT		0x00000004
31 #define USBHS_UGCTRL_PLLRESET		0x00000001
34 #define USBHS_UGCTRL2_USB2SEL		0x80000000
35 #define USBHS_UGCTRL2_USB2SEL_PCI	0x00000000
36 #define USBHS_UGCTRL2_USB2SEL_USB30	0x80000000
37 #define USBHS_UGCTRL2_USB0SEL		0x00000030
38 #define USBHS_UGCTRL2_USB0SEL_PCI	0x00000010
39 #define USBHS_UGCTRL2_USB0SEL_HS_USB	0x00000030
40 #define USBHS_UGCTRL2_USB0SEL_USB20	0x00000010
41 #define USBHS_UGCTRL2_USB0SEL_HS_USB20	0x00000020
44 #define USBHS_UGSTS_LOCK		0x00000100 /* From technical update */
57 	struct rcar_gen2_phy_driver *drv;  member
80 	struct rcar_gen2_channel *channel = phy->channel;  in rcar_gen2_phy_init()
81 	struct rcar_gen2_phy_driver *drv = channel->drv;  in rcar_gen2_phy_init()  local
89 	 * driver.   Achieving this with cmpxcgh() should be SMP-safe.  in rcar_gen2_phy_init()
91 	if (cmpxchg(&channel->selected_phy, -1, phy->number) != -1)  in rcar_gen2_phy_init()
92 		return -EBUSY;  in rcar_gen2_phy_init()
94 	clk_prepare_enable(drv->clk);  in rcar_gen2_phy_init()
96 	spin_lock_irqsave(&drv->lock, flags);  in rcar_gen2_phy_init()
97 	ugctrl2 = readl(drv->base + USBHS_UGCTRL2);  in rcar_gen2_phy_init()
98 	ugctrl2 &= ~channel->select_mask;  in rcar_gen2_phy_init()
99 	ugctrl2 |= phy->select_value;  in rcar_gen2_phy_init()
100 	writel(ugctrl2, drv->base + USBHS_UGCTRL2);  in rcar_gen2_phy_init()
101 	spin_unlock_irqrestore(&drv->lock, flags);  in rcar_gen2_phy_init()
102 	return 0;  in rcar_gen2_phy_init()
108 	struct rcar_gen2_channel *channel = phy->channel;  in rcar_gen2_phy_exit()
110 	clk_disable_unprepare(channel->drv->clk);  in rcar_gen2_phy_exit()
112 	channel->selected_phy = -1;  in rcar_gen2_phy_exit()
114 	return 0;  in rcar_gen2_phy_exit()
120 	struct rcar_gen2_phy_driver *drv = phy->channel->drv;  in rcar_gen2_phy_power_on()  local
121 	void __iomem *base = drv->base;  in rcar_gen2_phy_power_on()
124 	int err = 0, i;  in rcar_gen2_phy_power_on()
127 	if (phy->select_value != USBHS_UGCTRL2_USB0SEL_HS_USB)  in rcar_gen2_phy_power_on()
128 		return 0;  in rcar_gen2_phy_power_on()
130 	spin_lock_irqsave(&drv->lock, flags);  in rcar_gen2_phy_power_on()
141 	for (i = 0; i < 20; i++) {  in rcar_gen2_phy_power_on()
153 	err = -ETIMEDOUT;  in rcar_gen2_phy_power_on()
156 	spin_unlock_irqrestore(&drv->lock, flags);  in rcar_gen2_phy_power_on()
164 	struct rcar_gen2_phy_driver *drv = phy->channel->drv;  in rcar_gen2_phy_power_off()  local
165 	void __iomem *base = drv->base;  in rcar_gen2_phy_power_off()
170 	if (phy->select_value != USBHS_UGCTRL2_USB0SEL_HS_USB)  in rcar_gen2_phy_power_off()
171 		return 0;  in rcar_gen2_phy_power_off()
173 	spin_lock_irqsave(&drv->lock, flags);  in rcar_gen2_phy_power_off()
188 	spin_unlock_irqrestore(&drv->lock, flags);  in rcar_gen2_phy_power_off()
190 	return 0;  in rcar_gen2_phy_power_off()
196 	struct rcar_gen2_phy_driver *drv = phy->channel->drv;  in rz_g1c_phy_power_on()  local
197 	void __iomem *base = drv->base;  in rz_g1c_phy_power_on()
201 	spin_lock_irqsave(&drv->lock, flags);  in rz_g1c_phy_power_on()
211 	if (phy->select_value == USBHS_UGCTRL2_USB0SEL_HS_USB20) {  in rz_g1c_phy_power_on()
217 	spin_unlock_irqrestore(&drv->lock, flags);  in rz_g1c_phy_power_on()
219 	return 0;  in rz_g1c_phy_power_on()
225 	struct rcar_gen2_phy_driver *drv = phy->channel->drv;  in rz_g1c_phy_power_off()  local
226 	void __iomem *base = drv->base;  in rz_g1c_phy_power_off()
230 	spin_lock_irqsave(&drv->lock, flags);  in rz_g1c_phy_power_off()
232 	if (phy->select_value == USBHS_UGCTRL2_USB0SEL_HS_USB20) {  in rz_g1c_phy_power_off()
242 	spin_unlock_irqrestore(&drv->lock, flags);  in rz_g1c_phy_power_off()
244 	return 0;  in rz_g1c_phy_power_off()
264 	[0]	= { USBHS_UGCTRL2_USB0SEL_PCI, USBHS_UGCTRL2_USB0SEL_HS_USB },
286 		.compatible = "renesas,usb-phy-r8a77470",
290 		.compatible = "renesas,usb-phy-r8a7790",
294 		.compatible = "renesas,usb-phy-r8a7791",
298 		.compatible = "renesas,usb-phy-r8a7794",
302 		.compatible = "renesas,rcar-gen2-usb-phy",
312 	struct rcar_gen2_phy_driver *drv;  in rcar_gen2_phy_xlate()  local
313 	struct device_node *np = args->np;  in rcar_gen2_phy_xlate()
316 	drv = dev_get_drvdata(dev);  in rcar_gen2_phy_xlate()
317 	if (!drv)  in rcar_gen2_phy_xlate()
318 		return ERR_PTR(-EINVAL);  in rcar_gen2_phy_xlate()
320 	for (i = 0; i < drv->num_channels; i++) {  in rcar_gen2_phy_xlate()
321 		if (np == drv->channels[i].of_node)  in rcar_gen2_phy_xlate()
325 	if (i >= drv->num_channels || args->args[0] >= 2)  in rcar_gen2_phy_xlate()
326 		return ERR_PTR(-ENODEV);  in rcar_gen2_phy_xlate()
328 	return drv->channels[i].phys[args->args[0]].phy;  in rcar_gen2_phy_xlate()
332 	[0]	= USBHS_UGCTRL2_USB0SEL,
338 	struct device *dev = &pdev->dev;  in rcar_gen2_phy_probe()
339 	struct rcar_gen2_phy_driver *drv;  in rcar_gen2_phy_probe()  local
346 	int i = 0;  in rcar_gen2_phy_probe()
348 	if (!dev->of_node) {  in rcar_gen2_phy_probe()
351 		return -EINVAL;  in rcar_gen2_phy_probe()
360 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);  in rcar_gen2_phy_probe()
365 	drv = devm_kzalloc(dev, sizeof(*drv), GFP_KERNEL);  in rcar_gen2_phy_probe()
366 	if (!drv)  in rcar_gen2_phy_probe()
367 		return -ENOMEM;  in rcar_gen2_phy_probe()
369 	spin_lock_init(&drv->lock);  in rcar_gen2_phy_probe()
371 	drv->clk = clk;  in rcar_gen2_phy_probe()
372 	drv->base = base;  in rcar_gen2_phy_probe()
376 		return -EINVAL;  in rcar_gen2_phy_probe()
378 	drv->num_channels = of_get_child_count(dev->of_node);  in rcar_gen2_phy_probe()
379 	drv->channels = devm_kcalloc(dev, drv->num_channels,  in rcar_gen2_phy_probe()
382 	if (!drv->channels)  in rcar_gen2_phy_probe()
383 		return -ENOMEM;  in rcar_gen2_phy_probe()
385 	for_each_child_of_node(dev->of_node, np) {  in rcar_gen2_phy_probe()
386 		struct rcar_gen2_channel *channel = drv->channels + i;  in rcar_gen2_phy_probe()
390 		channel->of_node = np;  in rcar_gen2_phy_probe()
391 		channel->drv = drv;  in rcar_gen2_phy_probe()
392 		channel->selected_phy = -1;  in rcar_gen2_phy_probe()
395 		if (error || channel_num >= data->num_channels) {  in rcar_gen2_phy_probe()
400 		channel->select_mask = select_mask[channel_num];  in rcar_gen2_phy_probe()
402 		for (n = 0; n < PHYS_PER_CHANNEL; n++) {  in rcar_gen2_phy_probe()
403 			struct rcar_gen2_phy *phy = &channel->phys[n];  in rcar_gen2_phy_probe()
405 			phy->channel = channel;  in rcar_gen2_phy_probe()
406 			phy->number = n;  in rcar_gen2_phy_probe()
407 			phy->select_value = data->select_value[channel_num][n];  in rcar_gen2_phy_probe()
409 			phy->phy = devm_phy_create(dev, NULL,  in rcar_gen2_phy_probe()
410 						   data->gen2_phy_ops);  in rcar_gen2_phy_probe()
411 			if (IS_ERR(phy->phy)) {  in rcar_gen2_phy_probe()
414 				return PTR_ERR(phy->phy);  in rcar_gen2_phy_probe()
416 			phy_set_drvdata(phy->phy, phy);  in rcar_gen2_phy_probe()
428 	dev_set_drvdata(dev, drv);  in rcar_gen2_phy_probe()
430 	return 0;  in rcar_gen2_phy_probe()
444 MODULE_DESCRIPTION("Renesas R-Car Gen2 PHY");