1 // SPDX-License-Identifier: GPL-2.0-only
3  * Driver for onboard USB devices
26 #include <linux/usb.h>
27 #include <linux/usb/hcd.h>
28 #include <linux/usb/onboard_dev.h>
71 	const char * const *supply_names = onboard_dev->pdata->supply_names;  in onboard_dev_get_regulators()
72 	unsigned int num_supplies = onboard_dev->pdata->num_supplies;  in onboard_dev_get_regulators()
73 	struct device *dev = onboard_dev->dev;  in onboard_dev_get_regulators()
78 		return dev_err_probe(dev, -EINVAL, "max %d supplies supported!\n",  in onboard_dev_get_regulators()
82 		onboard_dev->supplies[i].supply = supply_names[i];  in onboard_dev_get_regulators()
84 	err = devm_regulator_bulk_get(dev, num_supplies, onboard_dev->supplies);  in onboard_dev_get_regulators()
96 	err = clk_prepare_enable(onboard_dev->clk);  in onboard_dev_power_on()
98 		dev_err(onboard_dev->dev, "failed to enable clock: %pe\n",  in onboard_dev_power_on()
103 	err = regulator_bulk_enable(onboard_dev->pdata->num_supplies,  in onboard_dev_power_on()
104 				    onboard_dev->supplies);  in onboard_dev_power_on()
106 		dev_err(onboard_dev->dev, "failed to enable supplies: %pe\n",  in onboard_dev_power_on()
111 	fsleep(onboard_dev->pdata->reset_us);  in onboard_dev_power_on()
112 	gpiod_set_value_cansleep(onboard_dev->reset_gpio, 0);  in onboard_dev_power_on()
113 	fsleep(onboard_dev->pdata->power_on_delay_us);  in onboard_dev_power_on()
115 	onboard_dev->is_powered_on = true;  in onboard_dev_power_on()
120 	clk_disable_unprepare(onboard_dev->clk);  in onboard_dev_power_on()
128 	gpiod_set_value_cansleep(onboard_dev->reset_gpio, 1);  in onboard_dev_power_off()
130 	err = regulator_bulk_disable(onboard_dev->pdata->num_supplies,  in onboard_dev_power_off()
131 				     onboard_dev->supplies);  in onboard_dev_power_off()
133 		dev_err(onboard_dev->dev, "failed to disable supplies: %pe\n",  in onboard_dev_power_off()
138 	clk_disable_unprepare(onboard_dev->clk);  in onboard_dev_power_off()
140 	onboard_dev->is_powered_on = false;  in onboard_dev_power_off()
151 	if (onboard_dev->always_powered_in_suspend)  in onboard_dev_suspend()
154 	mutex_lock(&onboard_dev->lock);  in onboard_dev_suspend()
156 	list_for_each_entry(node, &onboard_dev->udev_list, list) {  in onboard_dev_suspend()
157 		if (!device_may_wakeup(node->udev->bus->controller))  in onboard_dev_suspend()
160 		if (usb_wakeup_enabled_descendants(node->udev)) {  in onboard_dev_suspend()
166 	mutex_unlock(&onboard_dev->lock);  in onboard_dev_suspend()
178 	if (onboard_dev->is_powered_on)  in onboard_dev_resume()
187 	snprintf(buf, size, "usb_dev.%s", dev_name(&udev->dev));  in get_udev_link_name()
197 	mutex_lock(&onboard_dev->lock);  in onboard_dev_add_usbdev()
199 	if (onboard_dev->going_away) {  in onboard_dev_add_usbdev()
200 		err = -EINVAL;  in onboard_dev_add_usbdev()
206 		err = -ENOMEM;  in onboard_dev_add_usbdev()
210 	node->udev = udev;  in onboard_dev_add_usbdev()
212 	list_add(&node->list, &onboard_dev->udev_list);  in onboard_dev_add_usbdev()
214 	mutex_unlock(&onboard_dev->lock);  in onboard_dev_add_usbdev()
217 	WARN_ON(sysfs_create_link(&onboard_dev->dev->kobj, &udev->dev.kobj,  in onboard_dev_add_usbdev()
223 	mutex_unlock(&onboard_dev->lock);  in onboard_dev_add_usbdev()
235 	sysfs_remove_link(&onboard_dev->dev->kobj, link_name);  in onboard_dev_remove_usbdev()
237 	mutex_lock(&onboard_dev->lock);  in onboard_dev_remove_usbdev()
239 	list_for_each_entry(node, &onboard_dev->udev_list, list) {  in onboard_dev_remove_usbdev()
240 		if (node->udev == udev) {  in onboard_dev_remove_usbdev()
241 			list_del(&node->list);  in onboard_dev_remove_usbdev()
247 	mutex_unlock(&onboard_dev->lock);  in onboard_dev_remove_usbdev()
256 	return sysfs_emit(buf, "%d\n", onboard_dev->always_powered_in_suspend);  in always_powered_in_suspend_show()
271 	onboard_dev->always_powered_in_suspend = val;  in always_powered_in_suspend_store()
290 	    !onboard_dev->pdata->is_hub)  in onboard_dev_attrs_are_visible()
293 	return attr->mode;  in onboard_dev_attrs_are_visible()
309 		pr_err("Failed to attach USB driver: %pe\n", ERR_PTR(err));  in onboard_dev_attach_usb_driver()
315 	struct device *dev = &client->dev;  in onboard_dev_5744_i2c_init()
343 		return dev_err_probe(dev, ret, "USB Attach with SMBus command failed\n");  in onboard_dev_5744_i2c_init()
347 	return -ENODEV;  in onboard_dev_5744_i2c_init()
353 	struct device *dev = &pdev->dev;  in onboard_dev_probe()
360 		return -ENOMEM;  in onboard_dev_probe()
362 	onboard_dev->pdata = device_get_match_data(dev);  in onboard_dev_probe()
363 	if (!onboard_dev->pdata)  in onboard_dev_probe()
364 		return -EINVAL;  in onboard_dev_probe()
366 	if (!onboard_dev->pdata->is_hub)  in onboard_dev_probe()
367 		onboard_dev->always_powered_in_suspend = true;  in onboard_dev_probe()
369 	onboard_dev->dev = dev;  in onboard_dev_probe()
375 	onboard_dev->clk = devm_clk_get_optional(dev, NULL);  in onboard_dev_probe()
376 	if (IS_ERR(onboard_dev->clk))  in onboard_dev_probe()
377 		return dev_err_probe(dev, PTR_ERR(onboard_dev->clk),  in onboard_dev_probe()
380 	onboard_dev->reset_gpio = devm_gpiod_get_optional(dev, "reset",  in onboard_dev_probe()
382 	if (IS_ERR(onboard_dev->reset_gpio))  in onboard_dev_probe()
383 		return dev_err_probe(dev, PTR_ERR(onboard_dev->reset_gpio),  in onboard_dev_probe()
386 	mutex_init(&onboard_dev->lock);  in onboard_dev_probe()
387 	INIT_LIST_HEAD(&onboard_dev->udev_list);  in onboard_dev_probe()
395 	i2c_node = of_parse_phandle(pdev->dev.of_node, "i2c-bus", 0);  in onboard_dev_probe()
405 			err = -EPROBE_DEFER;  in onboard_dev_probe()
409 		if (of_device_is_compatible(pdev->dev.of_node, "usb424,2744") ||  in onboard_dev_probe()
410 		    of_device_is_compatible(pdev->dev.of_node, "usb424,5744"))  in onboard_dev_probe()
413 		put_device(&client->dev);  in onboard_dev_probe()
419 	 * The USB driver might have been detached from the USB devices by  in onboard_dev_probe()
421 	 * make sure to re-attach it if needed.  in onboard_dev_probe()
423 	 * This needs to be done deferred to avoid self-deadlocks on systems  in onboard_dev_probe()
437 	struct onboard_dev *onboard_dev = dev_get_drvdata(&pdev->dev);  in onboard_dev_remove()
441 	onboard_dev->going_away = true;  in onboard_dev_remove()
443 	mutex_lock(&onboard_dev->lock);  in onboard_dev_remove()
445 	/* unbind the USB devices to avoid dangling references to this device */  in onboard_dev_remove()
446 	while (!list_empty(&onboard_dev->udev_list)) {  in onboard_dev_remove()
447 		node = list_first_entry(&onboard_dev->udev_list,  in onboard_dev_remove()
449 		udev = node->udev;  in onboard_dev_remove()
453 		 * which acquires onboard_dev->lock. We must release the lock  in onboard_dev_remove()
456 		get_device(&udev->dev);  in onboard_dev_remove()
457 		mutex_unlock(&onboard_dev->lock);  in onboard_dev_remove()
458 		device_release_driver(&udev->dev);  in onboard_dev_remove()
459 		put_device(&udev->dev);  in onboard_dev_remove()
460 		mutex_lock(&onboard_dev->lock);  in onboard_dev_remove()
463 	mutex_unlock(&onboard_dev->lock);  in onboard_dev_remove()
479 		.name = "onboard-usb-dev",
486 /************************** USB driver **************************/
497  * Returns the onboard_dev platform device that is associated with the USB
506 	pdev = of_find_device_by_node(dev->of_node);  in _find_onboard_dev()
508 		np = of_parse_phandle(dev->of_node, "peer-hub", 0);  in _find_onboard_dev()
511 			return ERR_PTR(-EINVAL);  in _find_onboard_dev()
518 			return ERR_PTR(-ENODEV);  in _find_onboard_dev()
521 	onboard_dev = dev_get_drvdata(&pdev->dev);  in _find_onboard_dev()
522 	put_device(&pdev->dev);  in _find_onboard_dev()
532 		return ERR_PTR(-EPROBE_DEFER);  in _find_onboard_dev()
540 	return !!udev->dev.of_node;  in onboard_dev_usbdev_match()
545 	struct device *dev = &udev->dev;  in onboard_dev_usbdev_probe()
564 	struct onboard_dev *onboard_dev = dev_get_drvdata(&udev->dev);  in onboard_dev_usbdev_disconnect()
573 	{ USB_DEVICE(VENDOR_ID_GENESYS, 0x0608) }, /* Genesys Logic GL850G USB 2.0 HUB */
574 	{ USB_DEVICE(VENDOR_ID_GENESYS, 0x0610) }, /* Genesys Logic GL852G USB 2.0 HUB */
575 	{ USB_DEVICE(VENDOR_ID_GENESYS, 0x0620) }, /* Genesys Logic GL3523 USB 3.1 HUB */
576 	{ USB_DEVICE(VENDOR_ID_MICROCHIP, 0x2412) }, /* USB2412 USB 2.0 HUB */
577 	{ USB_DEVICE(VENDOR_ID_MICROCHIP, 0x2514) }, /* USB2514B USB 2.0 HUB */
578 	{ USB_DEVICE(VENDOR_ID_MICROCHIP, 0x2517) }, /* USB2517 USB 2.0 HUB */
579 	{ USB_DEVICE(VENDOR_ID_MICROCHIP, 0x2744) }, /* USB5744 USB 2.0 HUB */
580 	{ USB_DEVICE(VENDOR_ID_MICROCHIP, 0x5744) }, /* USB5744 USB 3.0 HUB */
581 	{ USB_DEVICE(VENDOR_ID_REALTEK, 0x0411) }, /* RTS5411 USB 3.1 HUB */
582 	{ USB_DEVICE(VENDOR_ID_REALTEK, 0x5411) }, /* RTS5411 USB 2.1 HUB */
583 	{ USB_DEVICE(VENDOR_ID_REALTEK, 0x0414) }, /* RTS5414 USB 3.2 HUB */
584 	{ USB_DEVICE(VENDOR_ID_REALTEK, 0x5414) }, /* RTS5414 USB 2.1 HUB */
594 MODULE_DEVICE_TABLE(usb, onboard_dev_id_table);
597 	.name = "onboard-usb-dev",
632 MODULE_DESCRIPTION("Driver for discrete onboard USB devices");