1 // SPDX-License-Identifier: GPL-2.0
3  * OMAP OTG controller driver
5  * Based on code from tahvo-usb.c and isp1301_omap.c drivers.
7  * Copyright (C) 2005-2006 Nokia Corporation
19 #include <linux/platform_data/usb-omap1.h>
44 	l = readl(otg_dev->base + OMAP_OTG_CTRL);  in omap_otg_ctrl()
47 	writel(l, otg_dev->base + OMAP_OTG_CTRL);  in omap_otg_ctrl()
52 	if (!otg_dev->id && otg_dev->vbus)  in omap_otg_set_mode()
53 		/* Set B-session valid. */  in omap_otg_set_mode()
55 	else if (otg_dev->vbus)  in omap_otg_set_mode()
56 		/* Set A-session valid. */  in omap_otg_set_mode()
58 	else if (!otg_dev->id)  in omap_otg_set_mode()
59 		/* Set B-session end to indicate no VBUS. */  in omap_otg_set_mode()
68 	otg_dev->id = event;  in omap_otg_id_notifier()
80 	otg_dev->vbus = event;  in omap_otg_vbus_notifier()
88 	const struct omap_usb_config *config = pdev->dev.platform_data;  in omap_otg_probe()
92 	u32 rev;  in omap_otg_probe()  local
94 	if (!config || !config->extcon)  in omap_otg_probe()
95 		return -ENODEV;  in omap_otg_probe()
97 	extcon = extcon_get_extcon_dev(config->extcon);  in omap_otg_probe()
101 	otg_dev = devm_kzalloc(&pdev->dev, sizeof(*otg_dev), GFP_KERNEL);  in omap_otg_probe()
103 		return -ENOMEM;  in omap_otg_probe()
105 	otg_dev->base = devm_ioremap_resource(&pdev->dev, &pdev->resource[0]);  in omap_otg_probe()
106 	if (IS_ERR(otg_dev->base))  in omap_otg_probe()
107 		return PTR_ERR(otg_dev->base);  in omap_otg_probe()
109 	otg_dev->extcon = extcon;  in omap_otg_probe()
110 	otg_dev->id_nb.notifier_call = omap_otg_id_notifier;  in omap_otg_probe()
111 	otg_dev->vbus_nb.notifier_call = omap_otg_vbus_notifier;  in omap_otg_probe()
113 	ret = devm_extcon_register_notifier(&pdev->dev, extcon,  in omap_otg_probe()
114 					EXTCON_USB_HOST, &otg_dev->id_nb);  in omap_otg_probe()
118 	ret = devm_extcon_register_notifier(&pdev->dev, extcon,  in omap_otg_probe()
119 					EXTCON_USB, &otg_dev->vbus_nb);  in omap_otg_probe()
124 	otg_dev->id = extcon_get_state(extcon, EXTCON_USB_HOST);  in omap_otg_probe()
125 	otg_dev->vbus = extcon_get_state(extcon, EXTCON_USB);  in omap_otg_probe()
128 	rev = readl(otg_dev->base);  in omap_otg_probe()
130 	dev_info(&pdev->dev,  in omap_otg_probe()
131 		 "OMAP USB OTG controller rev %d.%d (%s, id=%d, vbus=%d)\n",  in omap_otg_probe()
132 		 (rev >> 4) & 0xf, rev & 0xf, config->extcon, otg_dev->id,  in omap_otg_probe()
133 		 otg_dev->vbus);  in omap_otg_probe()
148 MODULE_DESCRIPTION("OMAP USB OTG controller driver");