mirror of
https://github.com/Fishwaldo/u-boot.git
synced 2025-03-18 13:11:31 +00:00
dm: usb: Add a uclass for USB controllers
Add a uclass that can represent a USB controller. For now we do not create devices for things attached to the controller. This will be added later. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Marek Vasut <marex@denx.de>
This commit is contained in:
parent
56a71f891b
commit
de31213fb8
6 changed files with 694 additions and 6 deletions
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@ -35,6 +35,20 @@ config USB
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if USB
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config DM_USB
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bool "Enable driver model for USB"
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depends on USB && DM
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help
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Enable driver model for USB. The USB interface is then implemented
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by the USB uclass. Multiple USB controllers of different types
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(XHCI, EHCI) can be attached and used. The 'usb' command works as
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normal. OCHI is not supported at present.
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Much of the code is shared but with this option enabled the USB
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uclass takes care of device enumeration. USB devices can be
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declared with the USB_DEVICE() macro and will be automatically
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probed when found on the bus.
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source "drivers/usb/host/Kconfig"
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config USB_STORAGE
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@ -5,6 +5,10 @@
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# SPDX-License-Identifier: GPL-2.0+
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#
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ifdef CONFIG_DM_USB
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obj-$(CONFIG_CMD_USB) += usb-uclass.o
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endif
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# ohci
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obj-$(CONFIG_USB_OHCI_NEW) += ohci-hcd.o
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obj-$(CONFIG_USB_ATMEL) += ohci-at91.o
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392
drivers/usb/host/usb-uclass.c
Normal file
392
drivers/usb/host/usb-uclass.c
Normal file
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@ -0,0 +1,392 @@
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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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* SPDX-License-Identifier: GPL-2.0+
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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 <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/root.h>
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#include <dm/uclass-internal.h>
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DECLARE_GLOBAL_DATA_PTR;
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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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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)
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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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}
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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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if (!ops->control)
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return -ENOSYS;
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return ops->control(bus, udev, pipe, buffer, length, setup);
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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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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_stop(void)
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{
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struct udevice *bus;
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struct uclass *uc;
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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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uclass_foreach_dev(bus, uc) {
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ret = device_remove(bus);
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if (ret && !err)
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err = ret;
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}
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usb_stor_reset();
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usb_hub_reset();
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usb_started = 0;
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return err;
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}
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static int 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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ret = usb_scan_device(bus, 0, USB_SPEED_FULL, &dev);
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if (ret)
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return ret;
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return priv->next_addr;
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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 udevice *bus;
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struct uclass *uc;
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int count = 0;
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int ret;
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asynch_allowed = 1;
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usb_hub_reset();
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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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uclass_foreach_dev(bus, uc) {
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/* init low_level USB */
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count++;
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printf("USB");
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printf("%d: ", bus->seq);
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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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/*
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* lowlevel init is OK, now scan the bus for devices
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* i.e. search HUBs and configure them
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*/
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controllers_initialized++;
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printf("scanning bus %d for devices... ", bus->seq);
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debug("\n");
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ret = usb_scan_bus(bus, true);
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if (ret < 0)
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printf("failed, error %d\n", ret);
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else if (!ret)
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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", ret);
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usb_started = true;
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}
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debug("scan end\n");
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/* if we were not able to find at least one working bus, bail out */
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if (!count)
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printf("No controllers found\n");
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else if (controllers_initialized == 0)
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printf("USB error: all controllers failed lowlevel init\n");
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return usb_started ? 0 : -1;
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}
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int usb_reset_root_port(void)
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{
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return -ENOSYS;
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}
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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_parentdata(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 *hub;
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int devnum = index + 1; /* Addresses are allocated from 1 on USB */
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device_find_first_child(bus, &hub);
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if (device_get_uclass_id(hub) == UCLASS_USB_HUB)
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return find_child_devnum(hub, devnum);
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return NULL;
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}
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int usb_post_bind(struct udevice *dev)
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{
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/* Scan the bus for devices */
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return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false);
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}
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int usb_port_reset(struct usb_device *parent, int portnr)
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{
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unsigned short portstatus;
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int ret;
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debug("%s: start\n", __func__);
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if (parent) {
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/* reset the port for the second time */
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assert(portnr > 0);
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debug("%s: reset %d\n", __func__, portnr - 1);
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ret = legacy_hub_port_reset(parent, portnr - 1, &portstatus);
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if (ret < 0) {
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printf("\n Couldn't reset port %i\n", portnr);
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return ret;
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}
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} else {
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debug("%s: reset root\n", __func__);
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usb_reset_root_port();
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}
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return 0;
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}
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int usb_legacy_port_reset(struct usb_device *parent, int portnr)
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{
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return usb_port_reset(parent, portnr);
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}
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int usb_scan_device(struct udevice *parent, int port,
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enum usb_device_speed speed, struct udevice **devp)
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{
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struct udevice *dev;
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bool created = false;
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struct usb_dev_platdata *plat;
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struct usb_bus_priv *priv;
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struct usb_device *parent_udev;
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int ret;
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ALLOC_CACHE_ALIGN_BUFFER(struct usb_device, udev, 1);
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struct usb_interface_descriptor *iface = &udev->config.if_desc[0].desc;
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*devp = NULL;
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memset(udev, '\0', sizeof(*udev));
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ret = usb_get_bus(parent, &udev->controller_dev);
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if (ret)
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return ret;
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priv = dev_get_uclass_priv(udev->controller_dev);
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/*
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* Somewhat nasty, this. We create a local device and use the normal
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* USB stack to read its descriptor. Then we know what type of device
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* to create for real.
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*
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* udev->dev is set to the parent, since we don't have a real device
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* yet. The USB stack should not access udev.dev anyway, except perhaps
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* to find the controller, and the controller will either be @parent,
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* or some parent of @parent.
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*
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* Another option might be to create the device as a generic USB
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* device, then morph it into the correct one when we know what it
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* should be. This means that a generic USB device would morph into
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* a network controller, or a USB flash stick, for example. However,
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* we don't support such morphing and it isn't clear that it would
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* be easy to do.
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*
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* Yet another option is to split out the USB stack parts of udev
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* into something like a 'struct urb' (as Linux does) which can exist
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* independently of any device. This feels cleaner, but calls for quite
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* a big change to the USB stack.
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*
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* For now, the approach is to set up an empty udev, read its
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* descriptor and assign it an address, then bind a real device and
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* stash the resulting information into the device's parent
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* platform data. Then when we probe it, usb_child_pre_probe() is called
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* and it will pull the information out of the stash.
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*/
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udev->dev = parent;
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udev->speed = speed;
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udev->devnum = priv->next_addr + 1;
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udev->portnr = port;
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debug("Calling usb_setup_device(), portnr=%d\n", udev->portnr);
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parent_udev = device_get_uclass_id(parent) == UCLASS_USB_HUB ?
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dev_get_parentdata(parent) : NULL;
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ret = usb_setup_device(udev, priv->desc_before_addr, parent_udev, port);
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debug("read_descriptor for '%s': ret=%d\n", parent->name, ret);
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if (ret)
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return ret;
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ret = usb_find_child(parent, &udev->descriptor, iface, &dev);
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debug("** usb_find_child returns %d\n", ret);
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/* TODO: Find a suitable driver and create the device */
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return -ENOENT;
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}
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int usb_child_post_bind(struct udevice *dev)
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{
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struct usb_dev_platdata *plat = dev_get_parent_platdata(dev);
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const void *blob = gd->fdt_blob;
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int val;
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if (dev->of_offset == -1)
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return 0;
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/* We only support matching a few things */
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val = fdtdec_get_int(blob, dev->of_offset, "usb,device-class", -1);
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if (val != -1) {
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plat->id.match_flags |= USB_DEVICE_ID_MATCH_DEV_CLASS;
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plat->id.bDeviceClass = val;
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}
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val = fdtdec_get_int(blob, dev->of_offset, "usb,interface-class", -1);
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if (val != -1) {
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plat->id.match_flags |= USB_DEVICE_ID_MATCH_INT_CLASS;
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plat->id.bInterfaceClass = val;
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}
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return 0;
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}
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int usb_get_bus(struct udevice *dev, struct udevice **busp)
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{
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struct udevice *bus;
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*busp = NULL;
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for (bus = dev; bus && device_get_uclass_id(bus) != UCLASS_USB; )
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bus = bus->parent;
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if (!bus) {
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/* By design this cannot happen */
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assert(bus);
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debug("USB HUB '%s' does not have a controller\n", dev->name);
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return -EXDEV;
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}
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*busp = bus;
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return 0;
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}
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int usb_child_pre_probe(struct udevice *dev)
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{
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struct udevice *bus;
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struct usb_device *udev = dev_get_parentdata(dev);
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struct usb_dev_platdata *plat = dev_get_parent_platdata(dev);
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int ret;
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ret = usb_get_bus(dev, &bus);
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if (ret)
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return ret;
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udev->controller_dev = bus;
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udev->dev = dev;
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udev->devnum = plat->devnum;
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udev->slot_id = plat->slot_id;
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udev->portnr = plat->portnr;
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udev->speed = plat->speed;
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debug("** device '%s': getting slot_id=%d\n", dev->name, plat->slot_id);
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ret = usb_select_config(udev);
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if (ret)
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return ret;
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return 0;
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}
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UCLASS_DRIVER(usb) = {
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.id = UCLASS_USB,
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.name = "usb",
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.flags = DM_UC_FLAG_SEQ_ALIAS,
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.post_bind = usb_post_bind,
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.per_child_auto_alloc_size = sizeof(struct usb_device),
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.per_device_auto_alloc_size = sizeof(struct usb_bus_priv),
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.child_post_bind = usb_child_post_bind,
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.child_pre_probe = usb_child_pre_probe,
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.per_child_platdata_auto_alloc_size = sizeof(struct usb_dev_platdata),
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};
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@ -180,7 +180,7 @@ void *poll_int_queue(struct usb_device *dev, struct int_queue *queue)
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return NULL; /* URB still pending */
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}
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void usb_reset_root_port(void)
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int usb_reset_root_port(void)
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{
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void *mbase = host->mregs;
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u8 power;
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@ -208,6 +208,8 @@ void usb_reset_root_port(void)
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(musb_readb(mbase, MUSB_DEVCTL) & MUSB_DEVCTL_FSDEV) ?
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USB_SPEED_FULL : USB_SPEED_LOW;
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mdelay((host_speed == USB_SPEED_LOW) ? 200 : 50);
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return 0;
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}
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int usb_lowlevel_init(int index, enum usb_init_type init, void **controller)
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@ -40,6 +40,7 @@ enum uclass_id {
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UCLASS_PCH, /* x86 platform controller hub */
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UCLASS_ETH, /* Ethernet device */
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UCLASS_LPC, /* x86 'low pin count' interface */
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UCLASS_USB, /* USB bus */
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UCLASS_COUNT,
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UCLASS_INVALID = -1,
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285
include/usb.h
285
include/usb.h
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@ -2,6 +2,9 @@
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* (C) Copyright 2001
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* Denis Peter, MPL AG Switzerland
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*
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* Adapted for U-Boot driver model
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* (C) Copyright 2015 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0+
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* Note: Part of this code has been derived from linux
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*
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@ -9,6 +12,7 @@
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#ifndef _USB_H_
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#define _USB_H_
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#include <fdtdec.h>
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#include <usb_defs.h>
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#include <linux/usb/ch9.h>
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#include <asm/cache.h>
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|
@ -85,6 +89,19 @@ enum {
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PACKET_SIZE_64 = 3,
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};
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/**
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* struct usb_device - information about a USB device
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*
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* With driver model both UCLASS_USB (the USB controllers) and UCLASS_USB_HUB
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* (the hubs) have this as parent data. Hubs are children of controllers or
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* other hubs and there is always a single root hub for each controller.
|
||||
* Therefore struct usb_device can always be accessed with
|
||||
* dev_get_parentdata(dev), where dev is a USB device.
|
||||
*
|
||||
* Pointers exist for obtaining both the device (could be any uclass) and
|
||||
* controller (UCLASS_USB) from this structure. The controller does not have
|
||||
* a struct usb_device since it is not a device.
|
||||
*/
|
||||
struct usb_device {
|
||||
int devnum; /* Device number on USB bus */
|
||||
int speed; /* full/low/high */
|
||||
|
@ -123,13 +140,19 @@ struct usb_device {
|
|||
unsigned long int_pending; /* 1 bit per ep, used by int_queue */
|
||||
int act_len; /* transfered bytes */
|
||||
int maxchild; /* Number of ports if hub */
|
||||
int portnr;
|
||||
int portnr; /* Port number, 1=first */
|
||||
#ifndef CONFIG_DM_USB
|
||||
/* parent hub, or NULL if this is the root hub */
|
||||
struct usb_device *parent;
|
||||
struct usb_device *children[USB_MAXCHILDREN];
|
||||
|
||||
void *controller; /* hardware controller private data */
|
||||
#endif
|
||||
/* slot_id - for xHCI enabled devices */
|
||||
unsigned int slot_id;
|
||||
#ifdef CONFIG_DM_USB
|
||||
struct udevice *dev; /* Pointer to associated device */
|
||||
struct udevice *controller_dev; /* Pointer to associated controller */
|
||||
#endif
|
||||
};
|
||||
|
||||
struct int_queue;
|
||||
|
@ -160,8 +183,9 @@ enum usb_init_type {
|
|||
|
||||
int usb_lowlevel_init(int index, enum usb_init_type init, void **controller);
|
||||
int usb_lowlevel_stop(int index);
|
||||
#ifdef CONFIG_MUSB_HOST
|
||||
void usb_reset_root_port(void);
|
||||
|
||||
#if defined(CONFIG_MUSB_HOST) || defined(CONFIG_DM_USB)
|
||||
int usb_reset_root_port(void);
|
||||
#else
|
||||
#define usb_reset_root_port()
|
||||
#endif
|
||||
|
@ -245,7 +269,6 @@ int usb_stop(void); /* stop the USB Controller */
|
|||
int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
|
||||
int usb_set_idle(struct usb_device *dev, int ifnum, int duration,
|
||||
int report_id);
|
||||
struct usb_device *usb_get_dev_index(int index);
|
||||
int usb_control_msg(struct usb_device *dev, unsigned int pipe,
|
||||
unsigned char request, unsigned char requesttype,
|
||||
unsigned short value, unsigned short index,
|
||||
|
@ -423,6 +446,258 @@ struct usb_hub_device {
|
|||
struct usb_hub_descriptor desc;
|
||||
};
|
||||
|
||||
#ifdef CONFIG_DM_USB
|
||||
/**
|
||||
* struct usb_platdata - Platform data about a USB controller
|
||||
*
|
||||
* Given a USB controller (UCLASS_USB) dev this is dev_get_platdata(dev)
|
||||
*/
|
||||
struct usb_platdata {
|
||||
enum usb_init_type init_type;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct usb_dev_platdata - Platform data about a USB device
|
||||
*
|
||||
* Given a USB device dev this structure is dev_get_parent_platdata(dev).
|
||||
* This is used by sandbox to provide emulation data also.
|
||||
*
|
||||
* @id: ID used to match this device
|
||||
* @speed: Stores the speed associated with a USB device
|
||||
* @devnum: Device address on the USB bus
|
||||
* @slot_id: USB3 slot ID, which is separate from the device address
|
||||
* @portnr: Port number of this device on its parent hub, numbered from 1
|
||||
* (0 mean this device is the root hub)
|
||||
* @strings: List of descriptor strings (for sandbox emulation purposes)
|
||||
* @desc_list: List of descriptors (for sandbox emulation purposes)
|
||||
*/
|
||||
struct usb_dev_platdata {
|
||||
struct usb_device_id id;
|
||||
enum usb_device_speed speed;
|
||||
int devnum;
|
||||
int slot_id;
|
||||
int portnr; /* Hub port number, 1..n */
|
||||
#ifdef CONFIG_SANDBOX
|
||||
struct usb_string *strings;
|
||||
/* NULL-terminated list of descriptor pointers */
|
||||
struct usb_generic_descriptor **desc_list;
|
||||
#endif
|
||||
int configno;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct usb_bus_priv - information about the USB controller
|
||||
*
|
||||
* Given a USB controller (UCLASS_USB) 'dev', this is
|
||||
* dev_get_uclass_priv(dev).
|
||||
*
|
||||
* @next_addr: Next device address to allocate minus 1. Incremented by 1
|
||||
* each time a new device address is set, so this holds the
|
||||
* number of devices on the bus
|
||||
* @desc_before_addr: true if we can read a device descriptor before it
|
||||
* has been assigned an address. For XHCI this is not possible
|
||||
* so this will be false.
|
||||
*/
|
||||
struct usb_bus_priv {
|
||||
int next_addr;
|
||||
bool desc_before_addr;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct dm_usb_ops - USB controller operations
|
||||
*
|
||||
* This defines the operations supoorted on a USB controller. Common
|
||||
* arguments are:
|
||||
*
|
||||
* @bus: USB bus (i.e. controller), which is in UCLASS_USB.
|
||||
* @udev: USB device parent data. Controllers are not expected to need
|
||||
* this, since the device address on the bus is encoded in @pipe.
|
||||
* It is used for sandbox, and can be handy for debugging and
|
||||
* logging.
|
||||
* @pipe: An assortment of bitfields which provide address and packet
|
||||
* type information. See create_pipe() above for encoding
|
||||
* details
|
||||
* @buffer: A buffer to use for sending/receiving. This should be
|
||||
* DMA-aligned.
|
||||
* @length: Buffer length in bytes
|
||||
*/
|
||||
struct dm_usb_ops {
|
||||
/**
|
||||
* control() - Send a control message
|
||||
*
|
||||
* Most parameters are as above.
|
||||
*
|
||||
* @setup: Additional setup information required by the message
|
||||
*/
|
||||
int (*control)(struct udevice *bus, struct usb_device *udev,
|
||||
unsigned long pipe, void *buffer, int length,
|
||||
struct devrequest *setup);
|
||||
/**
|
||||
* bulk() - Send a bulk message
|
||||
*
|
||||
* Parameters are as above.
|
||||
*/
|
||||
int (*bulk)(struct udevice *bus, struct usb_device *udev,
|
||||
unsigned long pipe, void *buffer, int length);
|
||||
/**
|
||||
* interrupt() - Send an interrupt message
|
||||
*
|
||||
* Most parameters are as above.
|
||||
*
|
||||
* @interval: Interrupt interval
|
||||
*/
|
||||
int (*interrupt)(struct udevice *bus, struct usb_device *udev,
|
||||
unsigned long pipe, void *buffer, int length,
|
||||
int interval);
|
||||
/**
|
||||
* alloc_device() - Allocate a new device context (XHCI)
|
||||
*
|
||||
* Before sending packets to a new device on an XHCI bus, a device
|
||||
* context must be created. If this method is not NULL it will be
|
||||
* called before the device is enumerated (even before its descriptor
|
||||
* is read). This should be NULL for EHCI, which does not need this.
|
||||
*/
|
||||
int (*alloc_device)(struct udevice *bus, struct usb_device *udev);
|
||||
};
|
||||
|
||||
#define usb_get_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops)
|
||||
#define usb_get_emul_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops)
|
||||
|
||||
#ifdef CONFIG_MUSB_HOST
|
||||
int usb_reset_root_port(void);
|
||||
#endif
|
||||
|
||||
/**
|
||||
* usb_get_dev_index() - look up a device index number
|
||||
*
|
||||
* Look up devices using their index number (starting at 0). This works since
|
||||
* in U-Boot device addresses are allocated starting at 1 with no gaps.
|
||||
*
|
||||
* TODO(sjg@chromium.org): Remove this function when usb_ether.c is modified
|
||||
* to work better with driver model.
|
||||
*
|
||||
* @bus: USB bus to check
|
||||
* @index: Index number of device to find (0=first). This is just the
|
||||
* device address less 1.
|
||||
*/
|
||||
struct usb_device *usb_get_dev_index(struct udevice *bus, int index);
|
||||
|
||||
/**
|
||||
* usb_legacy_port_reset() - Legacy function to reset a hub port
|
||||
*
|
||||
* @hub: Hub device
|
||||
* @portnr: Port number (1=first)
|
||||
*/
|
||||
int usb_legacy_port_reset(struct usb_device *hub, int portnr);
|
||||
|
||||
/**
|
||||
* usb_setup_device() - set up a device ready for use
|
||||
*
|
||||
* @dev: USB device pointer. This need not be a real device - it is
|
||||
* common for it to just be a local variable with its ->dev
|
||||
* member (i.e. @dev->dev) set to the parent device
|
||||
* @do_read: true to read the device descriptor before an address is set
|
||||
* (should be false for XHCI buses, true otherwise)
|
||||
* @parent: Parent device (either UCLASS_USB or UCLASS_USB_HUB)
|
||||
* @portnr: Port number on hub (1=first) or 0 for none
|
||||
* @return 0 if OK, -ve on error */
|
||||
int usb_setup_device(struct usb_device *dev, bool do_read,
|
||||
struct usb_device *parent, int portnr);
|
||||
|
||||
/**
|
||||
* usb_hub_scan() - Scan a hub and find its devices
|
||||
*
|
||||
* @hub: Hub device to scan
|
||||
*/
|
||||
int usb_hub_scan(struct udevice *hub);
|
||||
|
||||
/**
|
||||
* usb_scan_device() - Scan a device on a bus
|
||||
*
|
||||
* Scan a device on a bus. It has already been detected and is ready to
|
||||
* be enumerated. This may be either the root hub (@parent is a bus) or a
|
||||
* normal device (@parent is a hub)
|
||||
*
|
||||
* @parent: Parent device
|
||||
* @port: Hub port number (numbered from 1)
|
||||
* @speed: USB speed to use for this device
|
||||
* @devp: Returns pointer to device if all is well
|
||||
* @return 0 if OK, -ve on error
|
||||
*/
|
||||
int usb_scan_device(struct udevice *parent, int port,
|
||||
enum usb_device_speed speed, struct udevice **devp);
|
||||
|
||||
/**
|
||||
* usb_get_bus() - Find the bus for a device
|
||||
*
|
||||
* Search up through parents to find the bus this device is connected to. This
|
||||
* will be a device with uclass UCLASS_USB.
|
||||
*
|
||||
* @dev: Device to check
|
||||
* @busp: Returns bus, or NULL if not found
|
||||
* @return 0 if OK, -EXDEV is somehow this bus does not have a controller (this
|
||||
* indicates a critical error in the USB stack
|
||||
*/
|
||||
int usb_get_bus(struct udevice *dev, struct udevice **busp);
|
||||
|
||||
/**
|
||||
* usb_select_config() - Set up a device ready for use
|
||||
*
|
||||
* This function assumes that the device already has an address and a driver
|
||||
* bound, and is ready to be set up.
|
||||
*
|
||||
* This re-reads the device and configuration descriptors and sets the
|
||||
* configuration
|
||||
*
|
||||
* @dev: Device to set up
|
||||
*/
|
||||
int usb_select_config(struct usb_device *dev);
|
||||
|
||||
/**
|
||||
* usb_child_pre_probe() - Pre-probe function for USB devices
|
||||
*
|
||||
* This is called on all children of hubs and USB controllers (i.e. UCLASS_USB
|
||||
* and UCLASS_USB_HUB) when a new device is about to be probed. It sets up the
|
||||
* device from the saved platform data and calls usb_select_config() to
|
||||
* finish set up.
|
||||
*
|
||||
* Once this is done, the device's normal driver can take over, knowing the
|
||||
* device is accessible on the USB bus.
|
||||
*
|
||||
* This function is for use only by the internal USB stack.
|
||||
*
|
||||
* @dev: Device to set up
|
||||
*/
|
||||
int usb_child_pre_probe(struct udevice *dev);
|
||||
|
||||
struct ehci_ctrl;
|
||||
|
||||
/**
|
||||
* usb_setup_ehci_gadget() - Set up a USB device as a gadget
|
||||
*
|
||||
* TODO(sjg@chromium.org): Tidy this up when USB gadgets can use driver model
|
||||
*
|
||||
* This provides a way to tell a controller to start up as a USB device
|
||||
* instead of as a host. It is untested.
|
||||
*/
|
||||
int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp);
|
||||
|
||||
/**
|
||||
* usb_stor_reset() - Prepare to scan USB storage devices
|
||||
*
|
||||
* Empty the list of USB storage devices in preparation for scanning them.
|
||||
* This must be called before a USB scan.
|
||||
*/
|
||||
void usb_stor_reset(void);
|
||||
|
||||
#else /* !CONFIG_DM_USB */
|
||||
|
||||
struct usb_device *usb_get_dev_index(int index);
|
||||
|
||||
#endif
|
||||
|
||||
bool usb_device_has_child_on_port(struct usb_device *parent, int port);
|
||||
|
||||
int usb_hub_probe(struct usb_device *dev, int ifnum);
|
||||
void usb_hub_reset(void);
|
||||
int hub_port_reset(struct usb_device *dev, int port,
|
||||
|
|
Loading…
Add table
Reference in a new issue