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https://github.com/brain-hackers/u-boot-brain
synced 2024-08-19 16:38:53 +09:00
![Ye Li](/assets/img/avatar_default.png)
When unregister gadget driver in ci_udc, the usb device is not removed or stop. This causes next "usb start" fails to work. Add a new interface "usb_remove_ehci_gadget" in usb-uclass to remove the usb device for DM driver. Using "usb_lowlevel_stop" for non-DM driver. Signed-off-by: Ye Li <ye.li@nxp.com> Signed-off-by: Peng Fan <peng.fan@nxp.com>
869 lines
21 KiB
C
869 lines
21 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*
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* usb_match_device() modified from Linux kernel v4.0.
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <log.h>
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#include <memalign.h>
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#include <usb.h>
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#include <dm/device-internal.h>
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#include <dm/lists.h>
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#include <dm/uclass-internal.h>
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extern bool usb_started; /* flag for the started/stopped USB status */
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static bool asynch_allowed;
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struct usb_uclass_priv {
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int companion_device_count;
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};
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int usb_lock_async(struct usb_device *udev, int lock)
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{
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struct udevice *bus = udev->controller_dev;
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struct dm_usb_ops *ops = usb_get_ops(bus);
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if (!ops->lock_async)
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return -ENOSYS;
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return ops->lock_async(bus, lock);
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}
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int usb_disable_asynch(int disable)
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{
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int old_value = asynch_allowed;
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asynch_allowed = !disable;
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return old_value;
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}
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int submit_int_msg(struct usb_device *udev, unsigned long pipe, void *buffer,
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int length, int interval, bool nonblock)
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{
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struct udevice *bus = udev->controller_dev;
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struct dm_usb_ops *ops = usb_get_ops(bus);
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if (!ops->interrupt)
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return -ENOSYS;
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return ops->interrupt(bus, udev, pipe, buffer, length, interval,
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nonblock);
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}
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int submit_control_msg(struct usb_device *udev, unsigned long pipe,
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void *buffer, int length, struct devrequest *setup)
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{
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struct udevice *bus = udev->controller_dev;
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struct dm_usb_ops *ops = usb_get_ops(bus);
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struct usb_uclass_priv *uc_priv = bus->uclass->priv;
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int err;
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if (!ops->control)
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return -ENOSYS;
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err = ops->control(bus, udev, pipe, buffer, length, setup);
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if (setup->request == USB_REQ_SET_FEATURE &&
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setup->requesttype == USB_RT_PORT &&
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setup->value == cpu_to_le16(USB_PORT_FEAT_RESET) &&
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err == -ENXIO) {
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/* Device handed over to companion after port reset */
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uc_priv->companion_device_count++;
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}
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return err;
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}
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int submit_bulk_msg(struct usb_device *udev, unsigned long pipe, void *buffer,
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int length)
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{
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struct udevice *bus = udev->controller_dev;
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struct dm_usb_ops *ops = usb_get_ops(bus);
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if (!ops->bulk)
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return -ENOSYS;
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return ops->bulk(bus, udev, pipe, buffer, length);
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}
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struct int_queue *create_int_queue(struct usb_device *udev,
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unsigned long pipe, int queuesize, int elementsize,
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void *buffer, int interval)
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{
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struct udevice *bus = udev->controller_dev;
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struct dm_usb_ops *ops = usb_get_ops(bus);
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if (!ops->create_int_queue)
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return NULL;
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return ops->create_int_queue(bus, udev, pipe, queuesize, elementsize,
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buffer, interval);
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}
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void *poll_int_queue(struct usb_device *udev, struct int_queue *queue)
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{
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struct udevice *bus = udev->controller_dev;
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struct dm_usb_ops *ops = usb_get_ops(bus);
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if (!ops->poll_int_queue)
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return NULL;
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return ops->poll_int_queue(bus, udev, queue);
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}
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int destroy_int_queue(struct usb_device *udev, struct int_queue *queue)
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{
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struct udevice *bus = udev->controller_dev;
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struct dm_usb_ops *ops = usb_get_ops(bus);
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if (!ops->destroy_int_queue)
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return -ENOSYS;
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return ops->destroy_int_queue(bus, udev, queue);
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}
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int usb_alloc_device(struct usb_device *udev)
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{
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struct udevice *bus = udev->controller_dev;
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struct dm_usb_ops *ops = usb_get_ops(bus);
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/* This is only requird by some controllers - current XHCI */
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if (!ops->alloc_device)
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return 0;
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return ops->alloc_device(bus, udev);
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}
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int usb_reset_root_port(struct usb_device *udev)
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{
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struct udevice *bus = udev->controller_dev;
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struct dm_usb_ops *ops = usb_get_ops(bus);
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if (!ops->reset_root_port)
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return -ENOSYS;
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return ops->reset_root_port(bus, udev);
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}
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int usb_update_hub_device(struct usb_device *udev)
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{
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struct udevice *bus = udev->controller_dev;
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struct dm_usb_ops *ops = usb_get_ops(bus);
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if (!ops->update_hub_device)
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return -ENOSYS;
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return ops->update_hub_device(bus, udev);
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}
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int usb_get_max_xfer_size(struct usb_device *udev, size_t *size)
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{
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struct udevice *bus = udev->controller_dev;
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struct dm_usb_ops *ops = usb_get_ops(bus);
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if (!ops->get_max_xfer_size)
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return -ENOSYS;
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return ops->get_max_xfer_size(bus, size);
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}
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int usb_stop(void)
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{
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struct udevice *bus;
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struct udevice *rh;
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struct uclass *uc;
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struct usb_uclass_priv *uc_priv;
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int err = 0, ret;
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/* De-activate any devices that have been activated */
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ret = uclass_get(UCLASS_USB, &uc);
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if (ret)
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return ret;
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uc_priv = uc->priv;
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uclass_foreach_dev(bus, uc) {
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ret = device_remove(bus, DM_REMOVE_NORMAL);
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if (ret && !err)
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err = ret;
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/* Locate root hub device */
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device_find_first_child(bus, &rh);
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if (rh) {
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/*
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* All USB devices are children of root hub.
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* Unbinding root hub will unbind all of its children.
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*/
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ret = device_unbind(rh);
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if (ret && !err)
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err = ret;
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}
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}
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#ifdef CONFIG_USB_STORAGE
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usb_stor_reset();
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#endif
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uc_priv->companion_device_count = 0;
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usb_started = 0;
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return err;
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}
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static void usb_scan_bus(struct udevice *bus, bool recurse)
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{
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struct usb_bus_priv *priv;
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struct udevice *dev;
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int ret;
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priv = dev_get_uclass_priv(bus);
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assert(recurse); /* TODO: Support non-recusive */
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printf("scanning bus %s for devices... ", bus->name);
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debug("\n");
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ret = usb_scan_device(bus, 0, USB_SPEED_FULL, &dev);
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if (ret)
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printf("failed, error %d\n", ret);
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else if (priv->next_addr == 0)
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printf("No USB Device found\n");
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else
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printf("%d USB Device(s) found\n", priv->next_addr);
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}
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static void remove_inactive_children(struct uclass *uc, struct udevice *bus)
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{
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uclass_foreach_dev(bus, uc) {
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struct udevice *dev, *next;
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if (!device_active(bus))
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continue;
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device_foreach_child_safe(dev, next, bus) {
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if (!device_active(dev))
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device_unbind(dev);
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}
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}
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}
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int usb_init(void)
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{
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int controllers_initialized = 0;
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struct usb_uclass_priv *uc_priv;
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struct usb_bus_priv *priv;
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struct udevice *bus;
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struct uclass *uc;
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int ret;
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asynch_allowed = 1;
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ret = uclass_get(UCLASS_USB, &uc);
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if (ret)
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return ret;
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uc_priv = uc->priv;
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uclass_foreach_dev(bus, uc) {
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/* init low_level USB */
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printf("Bus %s: ", bus->name);
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#ifdef CONFIG_SANDBOX
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/*
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* For Sandbox, we need scan the device tree each time when we
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* start the USB stack, in order to re-create the emulated USB
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* devices and bind drivers for them before we actually do the
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* driver probe.
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*/
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ret = dm_scan_fdt_dev(bus);
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if (ret) {
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printf("Sandbox USB device scan failed (%d)\n", ret);
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continue;
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}
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#endif
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ret = device_probe(bus);
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if (ret == -ENODEV) { /* No such device. */
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puts("Port not available.\n");
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controllers_initialized++;
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continue;
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}
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if (ret) { /* Other error. */
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printf("probe failed, error %d\n", ret);
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continue;
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}
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controllers_initialized++;
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usb_started = true;
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}
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/*
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* lowlevel init done, now scan the bus for devices i.e. search HUBs
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* and configure them, first scan primary controllers.
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*/
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uclass_foreach_dev(bus, uc) {
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if (!device_active(bus))
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continue;
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priv = dev_get_uclass_priv(bus);
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if (!priv->companion)
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usb_scan_bus(bus, true);
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}
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/*
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* Now that the primary controllers have been scanned and have handed
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* over any devices they do not understand to their companions, scan
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* the companions if necessary.
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*/
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if (uc_priv->companion_device_count) {
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uclass_foreach_dev(bus, uc) {
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if (!device_active(bus))
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continue;
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priv = dev_get_uclass_priv(bus);
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if (priv->companion)
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usb_scan_bus(bus, true);
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}
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}
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debug("scan end\n");
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/* Remove any devices that were not found on this scan */
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remove_inactive_children(uc, bus);
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ret = uclass_get(UCLASS_USB_HUB, &uc);
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if (ret)
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return ret;
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remove_inactive_children(uc, bus);
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/* if we were not able to find at least one working bus, bail out */
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if (controllers_initialized == 0)
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printf("No working controllers found\n");
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return usb_started ? 0 : -1;
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}
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/*
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* TODO(sjg@chromium.org): Remove this legacy function. At present it is needed
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* to support boards which use driver model for USB but not Ethernet, and want
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* to use USB Ethernet.
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*
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* The #if clause is here to ensure that remains the only case.
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*/
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#if !defined(CONFIG_DM_ETH) && defined(CONFIG_USB_HOST_ETHER)
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static struct usb_device *find_child_devnum(struct udevice *parent, int devnum)
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{
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struct usb_device *udev;
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struct udevice *dev;
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if (!device_active(parent))
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return NULL;
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udev = dev_get_parent_priv(parent);
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if (udev->devnum == devnum)
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return udev;
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for (device_find_first_child(parent, &dev);
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dev;
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device_find_next_child(&dev)) {
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udev = find_child_devnum(dev, devnum);
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if (udev)
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return udev;
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}
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return NULL;
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}
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struct usb_device *usb_get_dev_index(struct udevice *bus, int index)
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{
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struct udevice *dev;
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int devnum = index + 1; /* Addresses are allocated from 1 on USB */
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device_find_first_child(bus, &dev);
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if (!dev)
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return NULL;
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return find_child_devnum(dev, devnum);
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}
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#endif
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int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp)
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{
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struct usb_platdata *plat;
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struct udevice *dev;
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int ret;
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/* Find the old device and remove it */
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ret = uclass_find_device_by_seq(UCLASS_USB, 0, true, &dev);
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if (ret)
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return ret;
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ret = device_remove(dev, DM_REMOVE_NORMAL);
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if (ret)
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return ret;
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plat = dev_get_platdata(dev);
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plat->init_type = USB_INIT_DEVICE;
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ret = device_probe(dev);
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if (ret)
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return ret;
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*ctlrp = dev_get_priv(dev);
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return 0;
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}
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int usb_remove_ehci_gadget(struct ehci_ctrl **ctlrp)
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{
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struct udevice *dev;
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int ret;
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/* Find the old device and remove it */
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ret = uclass_find_device_by_seq(UCLASS_USB, 0, true, &dev);
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if (ret)
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return ret;
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ret = device_remove(dev, DM_REMOVE_NORMAL);
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if (ret)
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return ret;
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*ctlrp = NULL;
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return 0;
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}
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/* returns 0 if no match, 1 if match */
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static int usb_match_device(const struct usb_device_descriptor *desc,
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const struct usb_device_id *id)
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{
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if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
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id->idVendor != desc->idVendor)
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return 0;
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if ((id->match_flags & USB_DEVICE_ID_MATCH_PRODUCT) &&
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id->idProduct != desc->idProduct)
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return 0;
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/* No need to test id->bcdDevice_lo != 0, since 0 is never
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greater than any unsigned number. */
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if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO) &&
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(id->bcdDevice_lo > desc->bcdDevice))
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return 0;
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if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI) &&
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(id->bcdDevice_hi < desc->bcdDevice))
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return 0;
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if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_CLASS) &&
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(id->bDeviceClass != desc->bDeviceClass))
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return 0;
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if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_SUBCLASS) &&
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(id->bDeviceSubClass != desc->bDeviceSubClass))
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return 0;
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if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_PROTOCOL) &&
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(id->bDeviceProtocol != desc->bDeviceProtocol))
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return 0;
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return 1;
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}
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/* returns 0 if no match, 1 if match */
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static int usb_match_one_id_intf(const struct usb_device_descriptor *desc,
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const struct usb_interface_descriptor *int_desc,
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const struct usb_device_id *id)
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{
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/* The interface class, subclass, protocol and number should never be
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* checked for a match if the device class is Vendor Specific,
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* unless the match record specifies the Vendor ID. */
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if (desc->bDeviceClass == USB_CLASS_VENDOR_SPEC &&
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!(id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
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(id->match_flags & (USB_DEVICE_ID_MATCH_INT_CLASS |
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USB_DEVICE_ID_MATCH_INT_SUBCLASS |
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USB_DEVICE_ID_MATCH_INT_PROTOCOL |
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USB_DEVICE_ID_MATCH_INT_NUMBER)))
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return 0;
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if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_CLASS) &&
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(id->bInterfaceClass != int_desc->bInterfaceClass))
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return 0;
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if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_SUBCLASS) &&
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(id->bInterfaceSubClass != int_desc->bInterfaceSubClass))
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return 0;
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if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_PROTOCOL) &&
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(id->bInterfaceProtocol != int_desc->bInterfaceProtocol))
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return 0;
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if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_NUMBER) &&
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(id->bInterfaceNumber != int_desc->bInterfaceNumber))
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return 0;
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return 1;
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}
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/* returns 0 if no match, 1 if match */
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static int usb_match_one_id(struct usb_device_descriptor *desc,
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struct usb_interface_descriptor *int_desc,
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const struct usb_device_id *id)
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{
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if (!usb_match_device(desc, id))
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return 0;
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return usb_match_one_id_intf(desc, int_desc, id);
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}
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static ofnode usb_get_ofnode(struct udevice *hub, int port)
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{
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ofnode node;
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u32 reg;
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if (!dev_has_of_node(hub))
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return ofnode_null();
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/*
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* The USB controller and its USB hub are two different udevices,
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* but the device tree has only one node for both. Thus we are
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* assigning this node to both udevices.
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* If port is zero, the controller scans its root hub, thus we
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* are using the same ofnode as the controller here.
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*/
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if (!port)
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return dev_ofnode(hub);
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ofnode_for_each_subnode(node, dev_ofnode(hub)) {
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if (ofnode_read_u32(node, "reg", ®))
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continue;
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|
|
if (reg == port)
|
|
return node;
|
|
}
|
|
|
|
return ofnode_null();
|
|
}
|
|
|
|
/**
|
|
* usb_find_and_bind_driver() - Find and bind the right USB driver
|
|
*
|
|
* This only looks at certain fields in the descriptor.
|
|
*/
|
|
static int usb_find_and_bind_driver(struct udevice *parent,
|
|
struct usb_device_descriptor *desc,
|
|
struct usb_interface_descriptor *iface,
|
|
int bus_seq, int devnum, int port,
|
|
struct udevice **devp)
|
|
{
|
|
struct usb_driver_entry *start, *entry;
|
|
int n_ents;
|
|
int ret;
|
|
char name[30], *str;
|
|
ofnode node = usb_get_ofnode(parent, port);
|
|
|
|
*devp = NULL;
|
|
debug("%s: Searching for driver\n", __func__);
|
|
start = ll_entry_start(struct usb_driver_entry, usb_driver_entry);
|
|
n_ents = ll_entry_count(struct usb_driver_entry, usb_driver_entry);
|
|
for (entry = start; entry != start + n_ents; entry++) {
|
|
const struct usb_device_id *id;
|
|
struct udevice *dev;
|
|
const struct driver *drv;
|
|
struct usb_dev_platdata *plat;
|
|
|
|
for (id = entry->match; id->match_flags; id++) {
|
|
if (!usb_match_one_id(desc, iface, id))
|
|
continue;
|
|
|
|
drv = entry->driver;
|
|
/*
|
|
* We could pass the descriptor to the driver as
|
|
* platdata (instead of NULL) and allow its bind()
|
|
* method to return -ENOENT if it doesn't support this
|
|
* device. That way we could continue the search to
|
|
* find another driver. For now this doesn't seem
|
|
* necesssary, so just bind the first match.
|
|
*/
|
|
ret = device_bind_ofnode(parent, drv, drv->name, NULL,
|
|
node, &dev);
|
|
if (ret)
|
|
goto error;
|
|
debug("%s: Match found: %s\n", __func__, drv->name);
|
|
dev->driver_data = id->driver_info;
|
|
plat = dev_get_parent_platdata(dev);
|
|
plat->id = *id;
|
|
*devp = dev;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Bind a generic driver so that the device can be used */
|
|
snprintf(name, sizeof(name), "generic_bus_%x_dev_%x", bus_seq, devnum);
|
|
str = strdup(name);
|
|
if (!str)
|
|
return -ENOMEM;
|
|
ret = device_bind_driver(parent, "usb_dev_generic_drv", str, devp);
|
|
|
|
error:
|
|
debug("%s: No match found: %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* usb_find_child() - Find an existing device which matches our needs
|
|
*
|
|
*
|
|
*/
|
|
static int usb_find_child(struct udevice *parent,
|
|
struct usb_device_descriptor *desc,
|
|
struct usb_interface_descriptor *iface,
|
|
struct udevice **devp)
|
|
{
|
|
struct udevice *dev;
|
|
|
|
*devp = NULL;
|
|
for (device_find_first_child(parent, &dev);
|
|
dev;
|
|
device_find_next_child(&dev)) {
|
|
struct usb_dev_platdata *plat = dev_get_parent_platdata(dev);
|
|
|
|
/* If this device is already in use, skip it */
|
|
if (device_active(dev))
|
|
continue;
|
|
debug(" %s: name='%s', plat=%d, desc=%d\n", __func__,
|
|
dev->name, plat->id.bDeviceClass, desc->bDeviceClass);
|
|
if (usb_match_one_id(desc, iface, &plat->id)) {
|
|
*devp = dev;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -ENOENT;
|
|
}
|
|
|
|
int usb_scan_device(struct udevice *parent, int port,
|
|
enum usb_device_speed speed, struct udevice **devp)
|
|
{
|
|
struct udevice *dev;
|
|
bool created = false;
|
|
struct usb_dev_platdata *plat;
|
|
struct usb_bus_priv *priv;
|
|
struct usb_device *parent_udev;
|
|
int ret;
|
|
ALLOC_CACHE_ALIGN_BUFFER(struct usb_device, udev, 1);
|
|
struct usb_interface_descriptor *iface = &udev->config.if_desc[0].desc;
|
|
|
|
*devp = NULL;
|
|
memset(udev, '\0', sizeof(*udev));
|
|
udev->controller_dev = usb_get_bus(parent);
|
|
priv = dev_get_uclass_priv(udev->controller_dev);
|
|
|
|
/*
|
|
* Somewhat nasty, this. We create a local device and use the normal
|
|
* USB stack to read its descriptor. Then we know what type of device
|
|
* to create for real.
|
|
*
|
|
* udev->dev is set to the parent, since we don't have a real device
|
|
* yet. The USB stack should not access udev.dev anyway, except perhaps
|
|
* to find the controller, and the controller will either be @parent,
|
|
* or some parent of @parent.
|
|
*
|
|
* Another option might be to create the device as a generic USB
|
|
* device, then morph it into the correct one when we know what it
|
|
* should be. This means that a generic USB device would morph into
|
|
* a network controller, or a USB flash stick, for example. However,
|
|
* we don't support such morphing and it isn't clear that it would
|
|
* be easy to do.
|
|
*
|
|
* Yet another option is to split out the USB stack parts of udev
|
|
* into something like a 'struct urb' (as Linux does) which can exist
|
|
* independently of any device. This feels cleaner, but calls for quite
|
|
* a big change to the USB stack.
|
|
*
|
|
* For now, the approach is to set up an empty udev, read its
|
|
* descriptor and assign it an address, then bind a real device and
|
|
* stash the resulting information into the device's parent
|
|
* platform data. Then when we probe it, usb_child_pre_probe() is called
|
|
* and it will pull the information out of the stash.
|
|
*/
|
|
udev->dev = parent;
|
|
udev->speed = speed;
|
|
udev->devnum = priv->next_addr + 1;
|
|
udev->portnr = port;
|
|
debug("Calling usb_setup_device(), portnr=%d\n", udev->portnr);
|
|
parent_udev = device_get_uclass_id(parent) == UCLASS_USB_HUB ?
|
|
dev_get_parent_priv(parent) : NULL;
|
|
ret = usb_setup_device(udev, priv->desc_before_addr, parent_udev);
|
|
debug("read_descriptor for '%s': ret=%d\n", parent->name, ret);
|
|
if (ret)
|
|
return ret;
|
|
ret = usb_find_child(parent, &udev->descriptor, iface, &dev);
|
|
debug("** usb_find_child returns %d\n", ret);
|
|
if (ret) {
|
|
if (ret != -ENOENT)
|
|
return ret;
|
|
ret = usb_find_and_bind_driver(parent, &udev->descriptor,
|
|
iface,
|
|
udev->controller_dev->seq,
|
|
udev->devnum, port, &dev);
|
|
if (ret)
|
|
return ret;
|
|
created = true;
|
|
}
|
|
plat = dev_get_parent_platdata(dev);
|
|
debug("%s: Probing '%s', plat=%p\n", __func__, dev->name, plat);
|
|
plat->devnum = udev->devnum;
|
|
plat->udev = udev;
|
|
priv->next_addr++;
|
|
ret = device_probe(dev);
|
|
if (ret) {
|
|
debug("%s: Device '%s' probe failed\n", __func__, dev->name);
|
|
priv->next_addr--;
|
|
if (created)
|
|
device_unbind(dev);
|
|
return ret;
|
|
}
|
|
*devp = dev;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Detect if a USB device has been plugged or unplugged.
|
|
*/
|
|
int usb_detect_change(void)
|
|
{
|
|
struct udevice *hub;
|
|
struct uclass *uc;
|
|
int change = 0;
|
|
int ret;
|
|
|
|
ret = uclass_get(UCLASS_USB_HUB, &uc);
|
|
if (ret)
|
|
return ret;
|
|
|
|
uclass_foreach_dev(hub, uc) {
|
|
struct usb_device *udev;
|
|
struct udevice *dev;
|
|
|
|
if (!device_active(hub))
|
|
continue;
|
|
for (device_find_first_child(hub, &dev);
|
|
dev;
|
|
device_find_next_child(&dev)) {
|
|
struct usb_port_status status;
|
|
|
|
if (!device_active(dev))
|
|
continue;
|
|
|
|
udev = dev_get_parent_priv(dev);
|
|
if (usb_get_port_status(udev, udev->portnr, &status)
|
|
< 0)
|
|
/* USB request failed */
|
|
continue;
|
|
|
|
if (le16_to_cpu(status.wPortChange) &
|
|
USB_PORT_STAT_C_CONNECTION)
|
|
change++;
|
|
}
|
|
}
|
|
|
|
return change;
|
|
}
|
|
|
|
static int usb_child_post_bind(struct udevice *dev)
|
|
{
|
|
struct usb_dev_platdata *plat = dev_get_parent_platdata(dev);
|
|
int val;
|
|
|
|
if (!dev_of_valid(dev))
|
|
return 0;
|
|
|
|
/* We only support matching a few things */
|
|
val = dev_read_u32_default(dev, "usb,device-class", -1);
|
|
if (val != -1) {
|
|
plat->id.match_flags |= USB_DEVICE_ID_MATCH_DEV_CLASS;
|
|
plat->id.bDeviceClass = val;
|
|
}
|
|
val = dev_read_u32_default(dev, "usb,interface-class", -1);
|
|
if (val != -1) {
|
|
plat->id.match_flags |= USB_DEVICE_ID_MATCH_INT_CLASS;
|
|
plat->id.bInterfaceClass = val;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct udevice *usb_get_bus(struct udevice *dev)
|
|
{
|
|
struct udevice *bus;
|
|
|
|
for (bus = dev; bus && device_get_uclass_id(bus) != UCLASS_USB; )
|
|
bus = bus->parent;
|
|
if (!bus) {
|
|
/* By design this cannot happen */
|
|
assert(bus);
|
|
debug("USB HUB '%s' does not have a controller\n", dev->name);
|
|
}
|
|
|
|
return bus;
|
|
}
|
|
|
|
int usb_child_pre_probe(struct udevice *dev)
|
|
{
|
|
struct usb_device *udev = dev_get_parent_priv(dev);
|
|
struct usb_dev_platdata *plat = dev_get_parent_platdata(dev);
|
|
int ret;
|
|
|
|
if (plat->udev) {
|
|
/*
|
|
* Copy over all the values set in the on stack struct
|
|
* usb_device in usb_scan_device() to our final struct
|
|
* usb_device for this dev.
|
|
*/
|
|
*udev = *(plat->udev);
|
|
/* And clear plat->udev as it will not be valid for long */
|
|
plat->udev = NULL;
|
|
udev->dev = dev;
|
|
} else {
|
|
/*
|
|
* This happens with devices which are explicitly bound
|
|
* instead of being discovered through usb_scan_device()
|
|
* such as sandbox emul devices.
|
|
*/
|
|
udev->dev = dev;
|
|
udev->controller_dev = usb_get_bus(dev);
|
|
udev->devnum = plat->devnum;
|
|
|
|
/*
|
|
* udev did not go through usb_scan_device(), so we need to
|
|
* select the config and read the config descriptors.
|
|
*/
|
|
ret = usb_select_config(udev);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
UCLASS_DRIVER(usb) = {
|
|
.id = UCLASS_USB,
|
|
.name = "usb",
|
|
.flags = DM_UC_FLAG_SEQ_ALIAS,
|
|
.post_bind = dm_scan_fdt_dev,
|
|
.priv_auto_alloc_size = sizeof(struct usb_uclass_priv),
|
|
.per_child_auto_alloc_size = sizeof(struct usb_device),
|
|
.per_device_auto_alloc_size = sizeof(struct usb_bus_priv),
|
|
.child_post_bind = usb_child_post_bind,
|
|
.child_pre_probe = usb_child_pre_probe,
|
|
.per_child_platdata_auto_alloc_size = sizeof(struct usb_dev_platdata),
|
|
};
|
|
|
|
UCLASS_DRIVER(usb_dev_generic) = {
|
|
.id = UCLASS_USB_DEV_GENERIC,
|
|
.name = "usb_dev_generic",
|
|
};
|
|
|
|
U_BOOT_DRIVER(usb_dev_generic_drv) = {
|
|
.id = UCLASS_USB_DEV_GENERIC,
|
|
.name = "usb_dev_generic_drv",
|
|
};
|