| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * (C) Copyright 2015 Google, Inc |
| * Written by Simon Glass <sjg@chromium.org> |
| * |
| * usb_match_device() modified from Linux kernel v4.0. |
| */ |
| |
| #include <common.h> |
| #include <dm.h> |
| #include <errno.h> |
| #include <log.h> |
| #include <memalign.h> |
| #include <usb.h> |
| #include <dm/device-internal.h> |
| #include <dm/lists.h> |
| #include <dm/uclass-internal.h> |
| |
| extern bool usb_started; /* flag for the started/stopped USB status */ |
| static bool asynch_allowed; |
| |
| struct usb_uclass_priv { |
| int companion_device_count; |
| }; |
| |
| int usb_lock_async(struct usb_device *udev, int lock) |
| { |
| struct udevice *bus = udev->controller_dev; |
| struct dm_usb_ops *ops = usb_get_ops(bus); |
| |
| if (!ops->lock_async) |
| return -ENOSYS; |
| |
| return ops->lock_async(bus, lock); |
| } |
| |
| int usb_disable_asynch(int disable) |
| { |
| int old_value = asynch_allowed; |
| |
| asynch_allowed = !disable; |
| return old_value; |
| } |
| |
| int submit_int_msg(struct usb_device *udev, unsigned long pipe, void *buffer, |
| int length, int interval, bool nonblock) |
| { |
| struct udevice *bus = udev->controller_dev; |
| struct dm_usb_ops *ops = usb_get_ops(bus); |
| |
| if (!ops->interrupt) |
| return -ENOSYS; |
| |
| return ops->interrupt(bus, udev, pipe, buffer, length, interval, |
| nonblock); |
| } |
| |
| int submit_control_msg(struct usb_device *udev, unsigned long pipe, |
| void *buffer, int length, struct devrequest *setup) |
| { |
| struct udevice *bus = udev->controller_dev; |
| struct dm_usb_ops *ops = usb_get_ops(bus); |
| struct usb_uclass_priv *uc_priv = uclass_get_priv(bus->uclass); |
| int err; |
| |
| if (!ops->control) |
| return -ENOSYS; |
| |
| err = ops->control(bus, udev, pipe, buffer, length, setup); |
| if (setup->request == USB_REQ_SET_FEATURE && |
| setup->requesttype == USB_RT_PORT && |
| setup->value == cpu_to_le16(USB_PORT_FEAT_RESET) && |
| err == -ENXIO) { |
| /* Device handed over to companion after port reset */ |
| uc_priv->companion_device_count++; |
| } |
| |
| return err; |
| } |
| |
| int submit_bulk_msg(struct usb_device *udev, unsigned long pipe, void *buffer, |
| int length) |
| { |
| struct udevice *bus = udev->controller_dev; |
| struct dm_usb_ops *ops = usb_get_ops(bus); |
| |
| if (!ops->bulk) |
| return -ENOSYS; |
| |
| return ops->bulk(bus, udev, pipe, buffer, length); |
| } |
| |
| struct int_queue *create_int_queue(struct usb_device *udev, |
| unsigned long pipe, int queuesize, int elementsize, |
| void *buffer, int interval) |
| { |
| struct udevice *bus = udev->controller_dev; |
| struct dm_usb_ops *ops = usb_get_ops(bus); |
| |
| if (!ops->create_int_queue) |
| return NULL; |
| |
| return ops->create_int_queue(bus, udev, pipe, queuesize, elementsize, |
| buffer, interval); |
| } |
| |
| void *poll_int_queue(struct usb_device *udev, struct int_queue *queue) |
| { |
| struct udevice *bus = udev->controller_dev; |
| struct dm_usb_ops *ops = usb_get_ops(bus); |
| |
| if (!ops->poll_int_queue) |
| return NULL; |
| |
| return ops->poll_int_queue(bus, udev, queue); |
| } |
| |
| int destroy_int_queue(struct usb_device *udev, struct int_queue *queue) |
| { |
| struct udevice *bus = udev->controller_dev; |
| struct dm_usb_ops *ops = usb_get_ops(bus); |
| |
| if (!ops->destroy_int_queue) |
| return -ENOSYS; |
| |
| return ops->destroy_int_queue(bus, udev, queue); |
| } |
| |
| int usb_alloc_device(struct usb_device *udev) |
| { |
| struct udevice *bus = udev->controller_dev; |
| struct dm_usb_ops *ops = usb_get_ops(bus); |
| |
| /* This is only requird by some controllers - current XHCI */ |
| if (!ops->alloc_device) |
| return 0; |
| |
| return ops->alloc_device(bus, udev); |
| } |
| |
| int usb_reset_root_port(struct usb_device *udev) |
| { |
| struct udevice *bus = udev->controller_dev; |
| struct dm_usb_ops *ops = usb_get_ops(bus); |
| |
| if (!ops->reset_root_port) |
| return -ENOSYS; |
| |
| return ops->reset_root_port(bus, udev); |
| } |
| |
| int usb_update_hub_device(struct usb_device *udev) |
| { |
| struct udevice *bus = udev->controller_dev; |
| struct dm_usb_ops *ops = usb_get_ops(bus); |
| |
| if (!ops->update_hub_device) |
| return -ENOSYS; |
| |
| return ops->update_hub_device(bus, udev); |
| } |
| |
| int usb_get_max_xfer_size(struct usb_device *udev, size_t *size) |
| { |
| struct udevice *bus = udev->controller_dev; |
| struct dm_usb_ops *ops = usb_get_ops(bus); |
| |
| if (!ops->get_max_xfer_size) |
| return -ENOSYS; |
| |
| return ops->get_max_xfer_size(bus, size); |
| } |
| |
| int usb_stop(void) |
| { |
| struct udevice *bus; |
| struct udevice *rh; |
| struct uclass *uc; |
| struct usb_uclass_priv *uc_priv; |
| int err = 0, ret; |
| |
| /* De-activate any devices that have been activated */ |
| ret = uclass_get(UCLASS_USB, &uc); |
| if (ret) |
| return ret; |
| |
| uc_priv = uclass_get_priv(uc); |
| |
| uclass_foreach_dev(bus, uc) { |
| ret = device_remove(bus, DM_REMOVE_NORMAL); |
| if (ret && !err) |
| err = ret; |
| |
| /* Locate root hub device */ |
| device_find_first_child(bus, &rh); |
| if (rh) { |
| /* |
| * All USB devices are children of root hub. |
| * Unbinding root hub will unbind all of its children. |
| */ |
| ret = device_unbind(rh); |
| if (ret && !err) |
| err = ret; |
| } |
| } |
| |
| #ifdef CONFIG_USB_STORAGE |
| usb_stor_reset(); |
| #endif |
| uc_priv->companion_device_count = 0; |
| usb_started = 0; |
| |
| return err; |
| } |
| |
| static void usb_scan_bus(struct udevice *bus, bool recurse) |
| { |
| struct usb_bus_priv *priv; |
| struct udevice *dev; |
| int ret; |
| |
| priv = dev_get_uclass_priv(bus); |
| |
| assert(recurse); /* TODO: Support non-recusive */ |
| |
| printf("scanning bus %s for devices... ", bus->name); |
| debug("\n"); |
| ret = usb_scan_device(bus, 0, USB_SPEED_FULL, &dev); |
| if (ret) |
| printf("failed, error %d\n", ret); |
| else if (priv->next_addr == 0) |
| printf("No USB Device found\n"); |
| else |
| printf("%d USB Device(s) found\n", priv->next_addr); |
| } |
| |
| static void remove_inactive_children(struct uclass *uc, struct udevice *bus) |
| { |
| uclass_foreach_dev(bus, uc) { |
| struct udevice *dev, *next; |
| |
| if (!device_active(bus)) |
| continue; |
| device_foreach_child_safe(dev, next, bus) { |
| if (!device_active(dev)) |
| device_unbind(dev); |
| } |
| } |
| } |
| |
| int usb_init(void) |
| { |
| int controllers_initialized = 0; |
| struct usb_uclass_priv *uc_priv; |
| struct usb_bus_priv *priv; |
| struct udevice *bus; |
| struct uclass *uc; |
| int ret; |
| |
| asynch_allowed = 1; |
| |
| ret = uclass_get(UCLASS_USB, &uc); |
| if (ret) |
| return ret; |
| |
| uc_priv = uclass_get_priv(uc); |
| |
| uclass_foreach_dev(bus, uc) { |
| /* init low_level USB */ |
| printf("Bus %s: ", bus->name); |
| |
| #ifdef CONFIG_SANDBOX |
| /* |
| * For Sandbox, we need scan the device tree each time when we |
| * start the USB stack, in order to re-create the emulated USB |
| * devices and bind drivers for them before we actually do the |
| * driver probe. |
| */ |
| ret = dm_scan_fdt_dev(bus); |
| if (ret) { |
| printf("Sandbox USB device scan failed (%d)\n", ret); |
| continue; |
| } |
| #endif |
| |
| ret = device_probe(bus); |
| if (ret == -ENODEV) { /* No such device. */ |
| puts("Port not available.\n"); |
| controllers_initialized++; |
| continue; |
| } |
| |
| if (ret) { /* Other error. */ |
| printf("probe failed, error %d\n", ret); |
| continue; |
| } |
| controllers_initialized++; |
| usb_started = true; |
| } |
| |
| /* |
| * lowlevel init done, now scan the bus for devices i.e. search HUBs |
| * and configure them, first scan primary controllers. |
| */ |
| uclass_foreach_dev(bus, uc) { |
| if (!device_active(bus)) |
| continue; |
| |
| priv = dev_get_uclass_priv(bus); |
| if (!priv->companion) |
| usb_scan_bus(bus, true); |
| } |
| |
| /* |
| * Now that the primary controllers have been scanned and have handed |
| * over any devices they do not understand to their companions, scan |
| * the companions if necessary. |
| */ |
| if (uc_priv->companion_device_count) { |
| uclass_foreach_dev(bus, uc) { |
| if (!device_active(bus)) |
| continue; |
| |
| priv = dev_get_uclass_priv(bus); |
| if (priv->companion) |
| usb_scan_bus(bus, true); |
| } |
| } |
| |
| debug("scan end\n"); |
| |
| /* Remove any devices that were not found on this scan */ |
| remove_inactive_children(uc, bus); |
| |
| ret = uclass_get(UCLASS_USB_HUB, &uc); |
| if (ret) |
| return ret; |
| remove_inactive_children(uc, bus); |
| |
| /* if we were not able to find at least one working bus, bail out */ |
| if (controllers_initialized == 0) |
| printf("No working controllers found\n"); |
| |
| return usb_started ? 0 : -1; |
| } |
| |
| /* |
| * TODO(sjg@chromium.org): Remove this legacy function. At present it is needed |
| * to support boards which use driver model for USB but not Ethernet, and want |
| * to use USB Ethernet. |
| * |
| * The #if clause is here to ensure that remains the only case. |
| */ |
| #if !defined(CONFIG_DM_ETH) && defined(CONFIG_USB_HOST_ETHER) |
| static struct usb_device *find_child_devnum(struct udevice *parent, int devnum) |
| { |
| struct usb_device *udev; |
| struct udevice *dev; |
| |
| if (!device_active(parent)) |
| return NULL; |
| udev = dev_get_parent_priv(parent); |
| if (udev->devnum == devnum) |
| return udev; |
| |
| for (device_find_first_child(parent, &dev); |
| dev; |
| device_find_next_child(&dev)) { |
| udev = find_child_devnum(dev, devnum); |
| if (udev) |
| return udev; |
| } |
| |
| return NULL; |
| } |
| |
| struct usb_device *usb_get_dev_index(struct udevice *bus, int index) |
| { |
| struct udevice *dev; |
| int devnum = index + 1; /* Addresses are allocated from 1 on USB */ |
| |
| device_find_first_child(bus, &dev); |
| if (!dev) |
| return NULL; |
| |
| return find_child_devnum(dev, devnum); |
| } |
| #endif |
| |
| int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp) |
| { |
| struct usb_plat *plat; |
| struct udevice *dev; |
| int ret; |
| |
| /* Find the old device and remove it */ |
| ret = uclass_find_device_by_seq(UCLASS_USB, 0, &dev); |
| if (ret) |
| return ret; |
| ret = device_remove(dev, DM_REMOVE_NORMAL); |
| if (ret) |
| return ret; |
| |
| plat = dev_get_plat(dev); |
| plat->init_type = USB_INIT_DEVICE; |
| ret = device_probe(dev); |
| if (ret) |
| return ret; |
| *ctlrp = dev_get_priv(dev); |
| |
| return 0; |
| } |
| |
| int usb_remove_ehci_gadget(struct ehci_ctrl **ctlrp) |
| { |
| struct udevice *dev; |
| int ret; |
| |
| /* Find the old device and remove it */ |
| ret = uclass_find_device_by_seq(UCLASS_USB, 0, &dev); |
| if (ret) |
| return ret; |
| ret = device_remove(dev, DM_REMOVE_NORMAL); |
| if (ret) |
| return ret; |
| |
| *ctlrp = NULL; |
| |
| return 0; |
| } |
| |
| /* returns 0 if no match, 1 if match */ |
| static int usb_match_device(const struct usb_device_descriptor *desc, |
| const struct usb_device_id *id) |
| { |
| if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) && |
| id->idVendor != desc->idVendor) |
| return 0; |
| |
| if ((id->match_flags & USB_DEVICE_ID_MATCH_PRODUCT) && |
| id->idProduct != desc->idProduct) |
| return 0; |
| |
| /* No need to test id->bcdDevice_lo != 0, since 0 is never |
| greater than any unsigned number. */ |
| if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO) && |
| (id->bcdDevice_lo > desc->bcdDevice)) |
| return 0; |
| |
| if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI) && |
| (id->bcdDevice_hi < desc->bcdDevice)) |
| return 0; |
| |
| if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_CLASS) && |
| (id->bDeviceClass != desc->bDeviceClass)) |
| return 0; |
| |
| if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_SUBCLASS) && |
| (id->bDeviceSubClass != desc->bDeviceSubClass)) |
| return 0; |
| |
| if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_PROTOCOL) && |
| (id->bDeviceProtocol != desc->bDeviceProtocol)) |
| return 0; |
| |
| return 1; |
| } |
| |
| /* returns 0 if no match, 1 if match */ |
| static int usb_match_one_id_intf(const struct usb_device_descriptor *desc, |
| const struct usb_interface_descriptor *int_desc, |
| const struct usb_device_id *id) |
| { |
| /* The interface class, subclass, protocol and number should never be |
| * checked for a match if the device class is Vendor Specific, |
| * unless the match record specifies the Vendor ID. */ |
| if (desc->bDeviceClass == USB_CLASS_VENDOR_SPEC && |
| !(id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) && |
| (id->match_flags & (USB_DEVICE_ID_MATCH_INT_CLASS | |
| USB_DEVICE_ID_MATCH_INT_SUBCLASS | |
| USB_DEVICE_ID_MATCH_INT_PROTOCOL | |
| USB_DEVICE_ID_MATCH_INT_NUMBER))) |
| return 0; |
| |
| if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_CLASS) && |
| (id->bInterfaceClass != int_desc->bInterfaceClass)) |
| return 0; |
| |
| if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_SUBCLASS) && |
| (id->bInterfaceSubClass != int_desc->bInterfaceSubClass)) |
| return 0; |
| |
| if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_PROTOCOL) && |
| (id->bInterfaceProtocol != int_desc->bInterfaceProtocol)) |
| return 0; |
| |
| if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_NUMBER) && |
| (id->bInterfaceNumber != int_desc->bInterfaceNumber)) |
| return 0; |
| |
| return 1; |
| } |
| |
| /* returns 0 if no match, 1 if match */ |
| static int usb_match_one_id(struct usb_device_descriptor *desc, |
| struct usb_interface_descriptor *int_desc, |
| const struct usb_device_id *id) |
| { |
| if (!usb_match_device(desc, id)) |
| return 0; |
| |
| return usb_match_one_id_intf(desc, int_desc, id); |
| } |
| |
| static ofnode usb_get_ofnode(struct udevice *hub, int port) |
| { |
| ofnode node; |
| u32 reg; |
| |
| if (!dev_has_of_node(hub)) |
| return ofnode_null(); |
| |
| /* |
| * The USB controller and its USB hub are two different udevices, |
| * but the device tree has only one node for both. Thus we are |
| * assigning this node to both udevices. |
| * If port is zero, the controller scans its root hub, thus we |
| * are using the same ofnode as the controller here. |
| */ |
| if (!port) |
| return dev_ofnode(hub); |
| |
| ofnode_for_each_subnode(node, dev_ofnode(hub)) { |
| if (ofnode_read_u32(node, "reg", ®)) |
| continue; |
| |
| 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_plat *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 |
| * plat (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(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_plat(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_plat *plat = dev_get_parent_plat(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_plat *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, |
| dev_seq(udev->controller_dev), |
| udev->devnum, port, &dev); |
| if (ret) |
| return ret; |
| created = true; |
| } |
| plat = dev_get_parent_plat(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_plat *plat = dev_get_parent_plat(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_plat *plat = dev_get_parent_plat(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 = sizeof(struct usb_uclass_priv), |
| .per_child_auto = sizeof(struct usb_device), |
| .per_device_auto = sizeof(struct usb_bus_priv), |
| .child_post_bind = usb_child_post_bind, |
| .child_pre_probe = usb_child_pre_probe, |
| .per_child_plat_auto = sizeof(struct usb_dev_plat), |
| }; |
| |
| 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", |
| }; |