1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (c) 2015-2021, The Linux Foundation. All rights reserved.
17 #include <linux/usb/role.h>
46 	writel(EUD_ENABLE, priv->base + EUD_REG_CSR_EUD_EN);  in enable_eud()
48 			priv->base + EUD_REG_INT1_EN_MASK);  in enable_eud()
49 	writel(1, priv->mode_mgr + EUD_REG_EUD_EN2);  in enable_eud()
51 	return usb_role_switch_set_role(priv->role_sw, USB_ROLE_DEVICE);  in enable_eud()
56 	writel(0, priv->base + EUD_REG_CSR_EUD_EN);  in disable_eud()
57 	writel(0, priv->mode_mgr + EUD_REG_EUD_EN2);  in disable_eud()
65 	return sysfs_emit(buf, "%d\n", chip->enabled);  in enable_show()
77 		return -EINVAL;  in enable_store()
82 			chip->enabled = enable;  in enable_store()
104 	/* read ctl_out_1[4] to find USB attach or detach event */  in usb_attach_detach()
105 	reg = readl(chip->base + EUD_REG_CTL_OUT_1);  in usb_attach_detach()
106 	chip->usb_attached = reg & EUD_INT_SAFE_MODE;  in usb_attach_detach()
118 	reg = readl(chip->base + EUD_REG_SW_ATTACH_DET);  in pet_eud()
120 		/* Detach & Attach pet for EUD */  in pet_eud()
121 		writel(0, chip->base + EUD_REG_SW_ATTACH_DET);  in pet_eud()
122 		/* Delay to make sure detach pet is done before attach pet */  in pet_eud()
123 		ret = readl_poll_timeout(chip->base + EUD_REG_SW_ATTACH_DET,  in pet_eud()
126 			dev_err(chip->dev, "Detach pet failed\n");  in pet_eud()
130 	/* Attach pet for EUD */  in pet_eud()
131 	writel(EUD_INT_PET_EUD, chip->base + EUD_REG_SW_ATTACH_DET);  in pet_eud()
139 	reg = readl(chip->base + EUD_REG_INT_STATUS_1);  in handle_eud_irq()
157 	if (chip->usb_attached)  in handle_eud_irq_thread()
158 		ret = usb_role_switch_set_role(chip->role_sw, USB_ROLE_DEVICE);  in handle_eud_irq_thread()
160 		ret = usb_role_switch_set_role(chip->role_sw, USB_ROLE_HOST);  in handle_eud_irq_thread()
162 		dev_err(chip->dev, "failed to set role switch\n");  in handle_eud_irq_thread()
165 	writel(BIT(0), chip->base + EUD_REG_VBUS_INT_CLR);  in handle_eud_irq_thread()
166 	writel(0, chip->base + EUD_REG_VBUS_INT_CLR);  in handle_eud_irq_thread()
175 	usb_role_switch_put(chip->role_sw);  in eud_role_switch_release()
183 	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);  in eud_probe()
185 		return -ENOMEM;  in eud_probe()
187 	chip->dev = &pdev->dev;  in eud_probe()
189 	chip->role_sw = usb_role_switch_get(&pdev->dev);  in eud_probe()
190 	if (IS_ERR(chip->role_sw))  in eud_probe()
191 		return dev_err_probe(chip->dev, PTR_ERR(chip->role_sw),  in eud_probe()
194 	ret = devm_add_action_or_reset(chip->dev, eud_role_switch_release, chip);  in eud_probe()
196 		return dev_err_probe(chip->dev, ret,  in eud_probe()
199 	chip->base = devm_platform_ioremap_resource(pdev, 0);  in eud_probe()
200 	if (IS_ERR(chip->base))  in eud_probe()
201 		return PTR_ERR(chip->base);  in eud_probe()
203 	chip->mode_mgr = devm_platform_ioremap_resource(pdev, 1);  in eud_probe()
204 	if (IS_ERR(chip->mode_mgr))  in eud_probe()
205 		return PTR_ERR(chip->mode_mgr);  in eud_probe()
207 	chip->irq = platform_get_irq(pdev, 0);  in eud_probe()
208 	if (chip->irq < 0)  in eud_probe()
209 		return chip->irq;  in eud_probe()
211 	ret = devm_request_threaded_irq(&pdev->dev, chip->irq, handle_eud_irq,  in eud_probe()
214 		return dev_err_probe(chip->dev, ret, "failed to allocate irq\n");  in eud_probe()
216 	enable_irq_wake(chip->irq);  in eud_probe()
227 	if (chip->enabled)  in eud_remove()
230 	device_init_wakeup(&pdev->dev, false);  in eud_remove()
231 	disable_irq_wake(chip->irq);  in eud_remove()