Lines Matching +full:usb +full:- +full:hub
1 // SPDX-License-Identifier: GPL-2.0-only
3 * Driver for onboard USB hubs
25 #include <linux/usb.h>
26 #include <linux/usb/hcd.h>
27 #include <linux/usb/onboard_hub.h>
34 * hub requires more than the currently supported supplies, add a new one here.
68 static int onboard_hub_power_on(struct onboard_hub *hub) in onboard_hub_power_on() argument
72 err = clk_prepare_enable(hub->clk); in onboard_hub_power_on()
74 dev_err(hub->dev, "failed to enable clock: %pe\n", ERR_PTR(err)); in onboard_hub_power_on()
78 err = regulator_bulk_enable(hub->pdata->num_supplies, hub->supplies); in onboard_hub_power_on()
80 dev_err(hub->dev, "failed to enable supplies: %pe\n", ERR_PTR(err)); in onboard_hub_power_on()
84 fsleep(hub->pdata->reset_us); in onboard_hub_power_on()
85 gpiod_set_value_cansleep(hub->reset_gpio, 0); in onboard_hub_power_on()
87 hub->is_powered_on = true; in onboard_hub_power_on()
92 static int onboard_hub_power_off(struct onboard_hub *hub) in onboard_hub_power_off() argument
96 gpiod_set_value_cansleep(hub->reset_gpio, 1); in onboard_hub_power_off()
98 err = regulator_bulk_disable(hub->pdata->num_supplies, hub->supplies); in onboard_hub_power_off()
100 dev_err(hub->dev, "failed to disable supplies: %pe\n", ERR_PTR(err)); in onboard_hub_power_off()
104 clk_disable_unprepare(hub->clk); in onboard_hub_power_off()
106 hub->is_powered_on = false; in onboard_hub_power_off()
113 struct onboard_hub *hub = dev_get_drvdata(dev); in onboard_hub_suspend() local
117 if (hub->always_powered_in_suspend) in onboard_hub_suspend()
120 mutex_lock(&hub->lock); in onboard_hub_suspend()
122 list_for_each_entry(node, &hub->udev_list, list) { in onboard_hub_suspend()
123 if (!device_may_wakeup(node->udev->bus->controller)) in onboard_hub_suspend()
126 if (usb_wakeup_enabled_descendants(node->udev)) { in onboard_hub_suspend()
132 mutex_unlock(&hub->lock); in onboard_hub_suspend()
137 return onboard_hub_power_off(hub); in onboard_hub_suspend()
142 struct onboard_hub *hub = dev_get_drvdata(dev); in onboard_hub_resume() local
144 if (hub->is_powered_on) in onboard_hub_resume()
147 return onboard_hub_power_on(hub); in onboard_hub_resume()
152 snprintf(buf, size, "usb_dev.%s", dev_name(&udev->dev)); in get_udev_link_name()
155 static int onboard_hub_add_usbdev(struct onboard_hub *hub, struct usb_device *udev) in onboard_hub_add_usbdev() argument
161 mutex_lock(&hub->lock); in onboard_hub_add_usbdev()
163 if (hub->going_away) { in onboard_hub_add_usbdev()
164 err = -EINVAL; in onboard_hub_add_usbdev()
170 err = -ENOMEM; in onboard_hub_add_usbdev()
174 node->udev = udev; in onboard_hub_add_usbdev()
176 list_add(&node->list, &hub->udev_list); in onboard_hub_add_usbdev()
178 mutex_unlock(&hub->lock); in onboard_hub_add_usbdev()
181 WARN_ON(sysfs_create_link(&hub->dev->kobj, &udev->dev.kobj, link_name)); in onboard_hub_add_usbdev()
186 mutex_unlock(&hub->lock); in onboard_hub_add_usbdev()
191 static void onboard_hub_remove_usbdev(struct onboard_hub *hub, const struct usb_device *udev) in onboard_hub_remove_usbdev() argument
197 sysfs_remove_link(&hub->dev->kobj, link_name); in onboard_hub_remove_usbdev()
199 mutex_lock(&hub->lock); in onboard_hub_remove_usbdev()
201 list_for_each_entry(node, &hub->udev_list, list) { in onboard_hub_remove_usbdev()
202 if (node->udev == udev) { in onboard_hub_remove_usbdev()
203 list_del(&node->list); in onboard_hub_remove_usbdev()
209 mutex_unlock(&hub->lock); in onboard_hub_remove_usbdev()
215 const struct onboard_hub *hub = dev_get_drvdata(dev); in always_powered_in_suspend_show() local
217 return sysfs_emit(buf, "%d\n", hub->always_powered_in_suspend); in always_powered_in_suspend_show()
223 struct onboard_hub *hub = dev_get_drvdata(dev); in always_powered_in_suspend_store() local
231 hub->always_powered_in_suspend = val; in always_powered_in_suspend_store()
249 pr_err("Failed to attach USB driver: %pe\n", ERR_PTR(err)); in onboard_hub_attach_usb_driver()
254 struct device *dev = &pdev->dev; in onboard_hub_probe()
255 struct onboard_hub *hub; in onboard_hub_probe() local
259 hub = devm_kzalloc(dev, sizeof(*hub), GFP_KERNEL); in onboard_hub_probe()
260 if (!hub) in onboard_hub_probe()
261 return -ENOMEM; in onboard_hub_probe()
263 hub->pdata = device_get_match_data(&pdev->dev); in onboard_hub_probe()
264 if (!hub->pdata) in onboard_hub_probe()
265 return -EINVAL; in onboard_hub_probe()
267 if (hub->pdata->num_supplies > MAX_SUPPLIES) in onboard_hub_probe()
268 return dev_err_probe(dev, -EINVAL, "max %zu supplies supported!\n", in onboard_hub_probe()
271 for (i = 0; i < hub->pdata->num_supplies; i++) in onboard_hub_probe()
272 hub->supplies[i].supply = supply_names[i]; in onboard_hub_probe()
274 err = devm_regulator_bulk_get(dev, hub->pdata->num_supplies, hub->supplies); in onboard_hub_probe()
280 hub->clk = devm_clk_get_optional(dev, NULL); in onboard_hub_probe()
281 if (IS_ERR(hub->clk)) in onboard_hub_probe()
282 return dev_err_probe(dev, PTR_ERR(hub->clk), "failed to get clock\n"); in onboard_hub_probe()
284 hub->reset_gpio = devm_gpiod_get_optional(dev, "reset", in onboard_hub_probe()
286 if (IS_ERR(hub->reset_gpio)) in onboard_hub_probe()
287 return dev_err_probe(dev, PTR_ERR(hub->reset_gpio), "failed to get reset GPIO\n"); in onboard_hub_probe()
289 hub->dev = dev; in onboard_hub_probe()
290 mutex_init(&hub->lock); in onboard_hub_probe()
291 INIT_LIST_HEAD(&hub->udev_list); in onboard_hub_probe()
293 dev_set_drvdata(dev, hub); in onboard_hub_probe()
295 err = onboard_hub_power_on(hub); in onboard_hub_probe()
300 * The USB driver might have been detached from the USB devices by in onboard_hub_probe()
302 * make sure to re-attach it if needed. in onboard_hub_probe()
304 * This needs to be done deferred to avoid self-deadlocks on systems in onboard_hub_probe()
314 struct onboard_hub *hub = dev_get_drvdata(&pdev->dev); in onboard_hub_remove() local
318 hub->going_away = true; in onboard_hub_remove()
320 mutex_lock(&hub->lock); in onboard_hub_remove()
322 /* unbind the USB devices to avoid dangling references to this device */ in onboard_hub_remove()
323 while (!list_empty(&hub->udev_list)) { in onboard_hub_remove()
324 node = list_first_entry(&hub->udev_list, struct usbdev_node, list); in onboard_hub_remove()
325 udev = node->udev; in onboard_hub_remove()
329 * which acquires hub->lock. We must release the lock first. in onboard_hub_remove()
331 get_device(&udev->dev); in onboard_hub_remove()
332 mutex_unlock(&hub->lock); in onboard_hub_remove()
333 device_release_driver(&udev->dev); in onboard_hub_remove()
334 put_device(&udev->dev); in onboard_hub_remove()
335 mutex_lock(&hub->lock); in onboard_hub_remove()
338 mutex_unlock(&hub->lock); in onboard_hub_remove()
340 onboard_hub_power_off(hub); in onboard_hub_remove()
354 .name = "onboard-usb-hub",
361 /************************** USB driver **************************/
371 * Returns the onboard_hub platform device that is associated with the USB
378 struct onboard_hub *hub; in _find_onboard_hub() local
380 pdev = of_find_device_by_node(dev->of_node); in _find_onboard_hub()
382 np = of_parse_phandle(dev->of_node, "peer-hub", 0); in _find_onboard_hub()
384 dev_err(dev, "failed to find device node for peer hub\n"); in _find_onboard_hub()
385 return ERR_PTR(-EINVAL); in _find_onboard_hub()
392 return ERR_PTR(-ENODEV); in _find_onboard_hub()
395 hub = dev_get_drvdata(&pdev->dev); in _find_onboard_hub()
396 put_device(&pdev->dev); in _find_onboard_hub()
399 * The presence of drvdata ('hub') indicates that the platform driver in _find_onboard_hub()
405 if (!hub) in _find_onboard_hub()
406 return ERR_PTR(-EPROBE_DEFER); in _find_onboard_hub()
408 return hub; in _find_onboard_hub()
413 struct device *dev = &udev->dev; in onboard_hub_usbdev_probe()
414 struct onboard_hub *hub; in onboard_hub_usbdev_probe() local
418 if (!dev->of_node) in onboard_hub_usbdev_probe()
419 return -ENODEV; in onboard_hub_usbdev_probe()
421 hub = _find_onboard_hub(dev); in onboard_hub_usbdev_probe()
422 if (IS_ERR(hub)) in onboard_hub_usbdev_probe()
423 return PTR_ERR(hub); in onboard_hub_usbdev_probe()
425 dev_set_drvdata(dev, hub); in onboard_hub_usbdev_probe()
427 err = onboard_hub_add_usbdev(hub, udev); in onboard_hub_usbdev_probe()
436 struct onboard_hub *hub = dev_get_drvdata(&udev->dev); in onboard_hub_usbdev_disconnect() local
438 onboard_hub_remove_usbdev(hub, udev); in onboard_hub_usbdev_disconnect()
445 { USB_DEVICE(VENDOR_ID_GENESYS, 0x0608) }, /* Genesys Logic GL850G USB 2.0 */
446 { USB_DEVICE(VENDOR_ID_GENESYS, 0x0610) }, /* Genesys Logic GL852G USB 2.0 */
447 { USB_DEVICE(VENDOR_ID_GENESYS, 0x0620) }, /* Genesys Logic GL3523 USB 3.1 */
448 { USB_DEVICE(VENDOR_ID_MICROCHIP, 0x2412) }, /* USB2412 USB 2.0 */
449 { USB_DEVICE(VENDOR_ID_MICROCHIP, 0x2514) }, /* USB2514B USB 2.0 */
450 { USB_DEVICE(VENDOR_ID_MICROCHIP, 0x2517) }, /* USB2517 USB 2.0 */
451 { USB_DEVICE(VENDOR_ID_MICROCHIP, 0x2744) }, /* USB5744 USB 2.0 */
452 { USB_DEVICE(VENDOR_ID_MICROCHIP, 0x5744) }, /* USB5744 USB 3.0 */
453 { USB_DEVICE(VENDOR_ID_REALTEK, 0x0411) }, /* RTS5411 USB 3.1 */
454 { USB_DEVICE(VENDOR_ID_REALTEK, 0x5411) }, /* RTS5411 USB 2.1 */
455 { USB_DEVICE(VENDOR_ID_REALTEK, 0x0414) }, /* RTS5414 USB 3.2 */
456 { USB_DEVICE(VENDOR_ID_REALTEK, 0x5414) }, /* RTS5414 USB 2.1 */
463 MODULE_DEVICE_TABLE(usb, onboard_hub_id_table);
466 .name = "onboard-usb-hub",
500 MODULE_DESCRIPTION("Driver for discrete onboard USB hubs");