2 * Most of this source has been derived from the Linux USB
4 * (C) Copyright Linus Torvalds 1999
5 * (C) Copyright Johannes Erdfelt 1999-2001
6 * (C) Copyright Andreas Gal 1999
7 * (C) Copyright Gregory P. Smith 1999
8 * (C) Copyright Deti Fliegl 1999 (new USB architecture)
9 * (C) Copyright Randy Dunlap 2000
10 * (C) Copyright David Brownell 2000 (kernel hotplug, usb_device_id)
11 * (C) Copyright Yggdrasil Computing, Inc. 2000
12 * (usb_device_id matching changes by Adam J. Richter)
15 * (C) Copyright 2001 Denis Peter, MPL AG Switzerland
17 * SPDX-License-Identifier: GPL-2.0+
20 /****************************************************************************
22 * Probes device for being a hub and configurate it
30 #include <asm/processor.h>
31 #include <asm/unaligned.h>
32 #include <linux/ctype.h>
33 #include <linux/list.h>
34 #include <asm/byteorder.h>
36 #include <asm/state.h>
38 #include <asm/unaligned.h>
40 DECLARE_GLOBAL_DATA_PTR;
44 #define USB_BUFSIZ 512
46 #define HUB_SHORT_RESET_TIME 20
47 #define HUB_LONG_RESET_TIME 200
49 #define PORT_OVERCURRENT_MAX_SCAN_COUNT 3
51 struct usb_device_scan {
52 struct usb_device *dev; /* USB hub device to scan */
53 struct usb_hub_device *hub; /* USB hub struct */
54 int port; /* USB port to scan */
55 struct list_head list;
58 static LIST_HEAD(usb_scan_list);
60 __weak void usb_hub_reset_devices(int port)
65 static inline bool usb_hub_is_superspeed(struct usb_device *hdev)
67 return hdev->descriptor.bDeviceProtocol == 3;
71 bool usb_hub_is_root_hub(struct udevice *hub)
73 if (device_get_uclass_id(hub->parent) != UCLASS_USB_HUB)
80 static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
82 unsigned short dtype = USB_DT_HUB;
84 if (usb_hub_is_superspeed(dev))
85 dtype = USB_DT_SS_HUB;
87 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
88 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
89 dtype << 8, 0, data, size, USB_CNTL_TIMEOUT);
92 static int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
94 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
95 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
96 port, NULL, 0, USB_CNTL_TIMEOUT);
99 static int usb_set_port_feature(struct usb_device *dev, int port, int feature)
101 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
102 USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
103 port, NULL, 0, USB_CNTL_TIMEOUT);
106 static int usb_get_hub_status(struct usb_device *dev, void *data)
108 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
109 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
110 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
113 int usb_get_port_status(struct usb_device *dev, int port, void *data)
117 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
118 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
119 data, sizeof(struct usb_port_status), USB_CNTL_TIMEOUT);
126 * Translate the USB 3.0 hub port status field into the old version
127 * that U-Boot understands. Do this only when the hub is not root hub.
128 * For root hub, the port status field has already been translated
129 * in the host controller driver (see xhci_submit_root() in xhci.c).
131 * Note: this only supports driver model.
134 if (!usb_hub_is_root_hub(dev->dev) && usb_hub_is_superspeed(dev)) {
135 struct usb_port_status *status = (struct usb_port_status *)data;
136 u16 tmp = (status->wPortStatus) & USB_SS_PORT_STAT_MASK;
138 if (status->wPortStatus & USB_SS_PORT_STAT_POWER)
139 tmp |= USB_PORT_STAT_POWER;
140 if ((status->wPortStatus & USB_SS_PORT_STAT_SPEED) ==
141 USB_SS_PORT_STAT_SPEED_5GBPS)
142 tmp |= USB_PORT_STAT_SUPER_SPEED;
144 status->wPortStatus = tmp;
152 static void usb_hub_power_on(struct usb_hub_device *hub)
155 struct usb_device *dev;
156 unsigned pgood_delay = hub->desc.bPwrOn2PwrGood * 2;
161 debug("enabling power on all ports\n");
162 for (i = 0; i < dev->maxchild; i++) {
163 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
164 debug("port %d returns %lX\n", i + 1, dev->status);
167 #ifdef CONFIG_SANDBOX
169 * Don't set timeout / delay values here. This results
170 * in these values still being reset to 0.
172 if (state_get_skip_delays())
177 * Wait for power to become stable,
178 * plus spec-defined max time for device to connect
179 * but allow this time to be increased via env variable as some
180 * devices break the spec and require longer warm-up times
182 env = getenv("usb_pgood_delay");
184 pgood_delay = max(pgood_delay,
185 (unsigned)simple_strtol(env, NULL, 0));
186 debug("pgood_delay=%dms\n", pgood_delay);
189 * Do a minimum delay of the larger value of 100ms or pgood_delay
190 * so that the power can stablize before the devices are queried
192 hub->query_delay = get_timer(0) + max(100, (int)pgood_delay);
195 * Record the power-on timeout here. The max. delay (timeout)
196 * will be done based on this value in the USB port loop in
197 * usb_hub_configure() later.
199 hub->connect_timeout = hub->query_delay + 1000;
200 debug("devnum=%d poweron: query_delay=%d connect_timeout=%d\n",
201 dev->devnum, max(100, (int)pgood_delay),
202 max(100, (int)pgood_delay) + 1000);
205 #ifndef CONFIG_DM_USB
206 static struct usb_hub_device hub_dev[USB_MAX_HUB];
207 static int usb_hub_index;
209 void usb_hub_reset(void)
213 /* Zero out global hub_dev in case its re-used again */
214 memset(hub_dev, 0, sizeof(hub_dev));
217 static struct usb_hub_device *usb_hub_allocate(void)
219 if (usb_hub_index < USB_MAX_HUB)
220 return &hub_dev[usb_hub_index++];
222 printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
229 static inline char *portspeed(int portstatus)
233 switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
234 case USB_PORT_STAT_SUPER_SPEED:
235 speed_str = "5 Gb/s";
237 case USB_PORT_STAT_HIGH_SPEED:
238 speed_str = "480 Mb/s";
240 case USB_PORT_STAT_LOW_SPEED:
241 speed_str = "1.5 Mb/s";
244 speed_str = "12 Mb/s";
252 * usb_hub_port_reset() - reset a port given its usb_device pointer
254 * Reset a hub port and see if a device is present on that port, providing
255 * sufficient time for it to show itself. The port status is returned.
257 * @dev: USB device to reset
258 * @port: Port number to reset (note ports are numbered from 0 here)
259 * @portstat: Returns port status
261 static int usb_hub_port_reset(struct usb_device *dev, int port,
262 unsigned short *portstat)
265 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
266 unsigned short portstatus, portchange;
267 int delay = HUB_SHORT_RESET_TIME; /* start with short reset delay */
270 debug("%s: resetting '%s' port %d...\n", __func__, dev->dev->name,
273 debug("%s: resetting port %d...\n", __func__, port + 1);
275 for (tries = 0; tries < MAX_TRIES; tries++) {
276 err = usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
282 if (usb_get_port_status(dev, port + 1, portsts) < 0) {
283 debug("get_port_status failed status %lX\n",
287 portstatus = le16_to_cpu(portsts->wPortStatus);
288 portchange = le16_to_cpu(portsts->wPortChange);
290 debug("portstatus %x, change %x, %s\n", portstatus, portchange,
291 portspeed(portstatus));
293 debug("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
294 " USB_PORT_STAT_ENABLE %d\n",
295 (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
296 (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
297 (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
300 * Perhaps we should check for the following here:
301 * - C_CONNECTION hasn't been set.
302 * - CONNECTION is still set.
304 * Doing so would ensure that the device is still connected
305 * to the bus, and hasn't been unplugged or replaced while the
306 * USB bus reset was going on.
308 * However, if we do that, then (at least) a San Disk Ultra
309 * USB 3.0 16GB device fails to reset on (at least) an NVIDIA
310 * Tegra Jetson TK1 board. For some reason, the device appears
311 * to briefly drop off the bus when this second bus reset is
312 * executed, yet if we retry this loop, it'll eventually come
313 * back after another reset or two.
316 if (portstatus & USB_PORT_STAT_ENABLE)
319 /* Switch to long reset delay for the next round */
320 delay = HUB_LONG_RESET_TIME;
323 if (tries == MAX_TRIES) {
324 debug("Cannot enable port %i after %i retries, " \
325 "disabling port.\n", port + 1, MAX_TRIES);
326 debug("Maybe the USB cable is bad?\n");
330 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
331 *portstat = portstatus;
335 int usb_hub_port_connect_change(struct usb_device *dev, int port)
337 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
338 unsigned short portstatus;
342 ret = usb_get_port_status(dev, port + 1, portsts);
344 debug("get_port_status failed\n");
348 portstatus = le16_to_cpu(portsts->wPortStatus);
349 debug("portstatus %x, change %x, %s\n",
351 le16_to_cpu(portsts->wPortChange),
352 portspeed(portstatus));
354 /* Clear the connection change status */
355 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
357 /* Disconnect any existing devices under this port */
358 if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
359 (!(portstatus & USB_PORT_STAT_ENABLE))) ||
360 usb_device_has_child_on_port(dev, port)) {
361 debug("usb_disconnect(&hub->children[port]);\n");
362 /* Return now if nothing is connected */
363 if (!(portstatus & USB_PORT_STAT_CONNECTION))
368 ret = usb_hub_port_reset(dev, port, &portstatus);
371 printf("cannot reset port %i!?\n", port + 1);
375 switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
376 case USB_PORT_STAT_SUPER_SPEED:
377 speed = USB_SPEED_SUPER;
379 case USB_PORT_STAT_HIGH_SPEED:
380 speed = USB_SPEED_HIGH;
382 case USB_PORT_STAT_LOW_SPEED:
383 speed = USB_SPEED_LOW;
386 speed = USB_SPEED_FULL;
391 struct udevice *child;
393 ret = usb_scan_device(dev->dev, port + 1, speed, &child);
395 struct usb_device *usb;
397 ret = usb_alloc_new_device(dev->controller, &usb);
399 printf("cannot create new device: ret=%d", ret);
403 dev->children[port] = usb;
406 usb->portnr = port + 1;
407 /* Run it through the hoops (find a driver, etc) */
408 ret = usb_new_device(usb);
410 /* Woops, disable the port */
411 usb_free_device(dev->controller);
412 dev->children[port] = NULL;
416 debug("hub: disabling port %d\n", port + 1);
417 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
423 static int usb_scan_port(struct usb_device_scan *usb_scan)
425 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
426 unsigned short portstatus;
427 unsigned short portchange;
428 struct usb_device *dev;
429 struct usb_hub_device *hub;
438 * Don't talk to the device before the query delay is expired.
439 * This is needed for voltages to stabalize.
441 if (get_timer(0) < hub->query_delay)
444 ret = usb_get_port_status(dev, i + 1, portsts);
446 debug("get_port_status failed\n");
447 if (get_timer(0) >= hub->connect_timeout) {
448 debug("devnum=%d port=%d: timeout\n",
450 /* Remove this device from scanning list */
451 list_del(&usb_scan->list);
458 portstatus = le16_to_cpu(portsts->wPortStatus);
459 portchange = le16_to_cpu(portsts->wPortChange);
460 debug("Port %d Status %X Change %X\n", i + 1, portstatus, portchange);
463 * No connection change happened, wait a bit more.
465 * For some situation, the hub reports no connection change but a
466 * device is connected to the port (eg: CCS bit is set but CSC is not
467 * in the PORTSC register of a root hub), ignore such case.
469 if (!(portchange & USB_PORT_STAT_C_CONNECTION) &&
470 !(portstatus & USB_PORT_STAT_CONNECTION)) {
471 if (get_timer(0) >= hub->connect_timeout) {
472 debug("devnum=%d port=%d: timeout\n",
474 /* Remove this device from scanning list */
475 list_del(&usb_scan->list);
482 /* A new USB device is ready at this point */
483 debug("devnum=%d port=%d: USB dev found\n", dev->devnum, i + 1);
485 usb_hub_port_connect_change(dev, i);
487 if (portchange & USB_PORT_STAT_C_ENABLE) {
488 debug("port %d enable change, status %x\n", i + 1, portstatus);
489 usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_ENABLE);
491 * The following hack causes a ghost device problem
494 #ifndef CONFIG_USB_EHCI_FARADAY
496 * EM interference sometimes causes bad shielded USB
497 * devices to be shutdown by the hub, this hack enables
498 * them again. Works at least with mouse driver
500 if (!(portstatus & USB_PORT_STAT_ENABLE) &&
501 (portstatus & USB_PORT_STAT_CONNECTION) &&
502 usb_device_has_child_on_port(dev, i)) {
503 debug("already running port %i disabled by hub (EMI?), re-enabling...\n",
505 usb_hub_port_connect_change(dev, i);
510 if (portstatus & USB_PORT_STAT_SUSPEND) {
511 debug("port %d suspend change\n", i + 1);
512 usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_SUSPEND);
515 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
516 debug("port %d over-current change\n", i + 1);
517 usb_clear_port_feature(dev, i + 1,
518 USB_PORT_FEAT_C_OVER_CURRENT);
519 /* Only power-on this one port */
520 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
521 hub->overcurrent_count[i]++;
524 * If the max-scan-count is not reached, return without removing
525 * the device from scan-list. This will re-issue a new scan.
527 if (hub->overcurrent_count[i] <=
528 PORT_OVERCURRENT_MAX_SCAN_COUNT)
531 /* Otherwise the device will get removed */
532 printf("Port %d over-current occurred %d times\n", i + 1,
533 hub->overcurrent_count[i]);
536 if (portchange & USB_PORT_STAT_C_RESET) {
537 debug("port %d reset change\n", i + 1);
538 usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET);
542 * We're done with this device, so let's remove this device from
545 list_del(&usb_scan->list);
551 static int usb_device_list_scan(void)
553 struct usb_device_scan *usb_scan;
554 struct usb_device_scan *tmp;
558 /* Only run this loop once for each controller */
565 /* We're done, once the list is empty again */
566 if (list_empty(&usb_scan_list))
569 list_for_each_entry_safe(usb_scan, tmp, &usb_scan_list, list) {
573 ret = usb_scan_port(usb_scan);
581 * This USB controller has finished scanning all its connected
582 * USB devices. Set "running" back to 0, so that other USB controllers
583 * will scan their devices too.
590 static struct usb_hub_device *usb_get_hub_device(struct usb_device *dev)
592 struct usb_hub_device *hub;
594 #ifndef CONFIG_DM_USB
595 /* "allocate" Hub device */
596 hub = usb_hub_allocate();
598 hub = dev_get_uclass_priv(dev->dev);
604 static int usb_hub_configure(struct usb_device *dev)
607 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ);
608 unsigned char *bitmap;
609 short hubCharacteristics;
610 struct usb_hub_descriptor *descriptor;
611 struct usb_hub_device *hub;
612 __maybe_unused struct usb_hub_status *hubsts;
615 hub = usb_get_hub_device(dev);
620 /* Get the the hub descriptor */
621 ret = usb_get_hub_descriptor(dev, buffer, 4);
623 debug("usb_hub_configure: failed to get hub " \
624 "descriptor, giving up %lX\n", dev->status);
627 descriptor = (struct usb_hub_descriptor *)buffer;
629 length = min_t(int, descriptor->bLength,
630 sizeof(struct usb_hub_descriptor));
632 ret = usb_get_hub_descriptor(dev, buffer, length);
634 debug("usb_hub_configure: failed to get hub " \
635 "descriptor 2nd giving up %lX\n", dev->status);
638 memcpy((unsigned char *)&hub->desc, buffer, length);
639 /* adjust 16bit values */
640 put_unaligned(le16_to_cpu(get_unaligned(
641 &descriptor->wHubCharacteristics)),
642 &hub->desc.wHubCharacteristics);
644 bitmap = (unsigned char *)&hub->desc.u.hs.DeviceRemovable[0];
645 /* devices not removable by default */
646 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
647 bitmap = (unsigned char *)&hub->desc.u.hs.PortPowerCtrlMask[0];
648 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
650 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
651 hub->desc.u.hs.DeviceRemovable[i] =
652 descriptor->u.hs.DeviceRemovable[i];
654 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
655 hub->desc.u.hs.PortPowerCtrlMask[i] =
656 descriptor->u.hs.PortPowerCtrlMask[i];
658 dev->maxchild = descriptor->bNbrPorts;
659 debug("%d ports detected\n", dev->maxchild);
661 hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics);
662 switch (hubCharacteristics & HUB_CHAR_LPSM) {
664 debug("ganged power switching\n");
667 debug("individual port power switching\n");
671 debug("unknown reserved power switching mode\n");
675 if (hubCharacteristics & HUB_CHAR_COMPOUND)
676 debug("part of a compound device\n");
678 debug("standalone hub\n");
680 switch (hubCharacteristics & HUB_CHAR_OCPM) {
682 debug("global over-current protection\n");
685 debug("individual port over-current protection\n");
689 debug("no over-current protection\n");
693 debug("power on to power good time: %dms\n",
694 descriptor->bPwrOn2PwrGood * 2);
695 debug("hub controller current requirement: %dmA\n",
696 descriptor->bHubContrCurrent);
698 for (i = 0; i < dev->maxchild; i++)
699 debug("port %d is%s removable\n", i + 1,
700 hub->desc.u.hs.DeviceRemovable[(i + 1) / 8] & \
701 (1 << ((i + 1) % 8)) ? " not" : "");
703 if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
704 debug("usb_hub_configure: failed to get Status - " \
705 "too long: %d\n", descriptor->bLength);
709 ret = usb_get_hub_status(dev, buffer);
711 debug("usb_hub_configure: failed to get Status %lX\n",
717 hubsts = (struct usb_hub_status *)buffer;
720 debug("get_hub_status returned status %X, change %X\n",
721 le16_to_cpu(hubsts->wHubStatus),
722 le16_to_cpu(hubsts->wHubChange));
723 debug("local power source is %s\n",
724 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
725 "lost (inactive)" : "good");
726 debug("%sover-current condition exists\n",
727 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
729 usb_hub_power_on(hub);
732 * Reset any devices that may be in a bad state when applying
733 * the power. This is a __weak function. Resetting of the devices
734 * should occur in the board file of the device.
736 for (i = 0; i < dev->maxchild; i++)
737 usb_hub_reset_devices(i + 1);
740 * Only add the connected USB devices, including potential hubs,
741 * to a scanning list. This list will get scanned and devices that
742 * are detected (either via port connected or via port timeout)
743 * will get removed from this list. Scanning of the devices on this
744 * list will continue until all devices are removed.
746 for (i = 0; i < dev->maxchild; i++) {
747 struct usb_device_scan *usb_scan;
749 usb_scan = calloc(1, sizeof(*usb_scan));
751 printf("Can't allocate memory for USB device!\n");
757 list_add_tail(&usb_scan->list, &usb_scan_list);
761 * And now call the scanning code which loops over the generated list
763 ret = usb_device_list_scan();
768 static int usb_hub_check(struct usb_device *dev, int ifnum)
770 struct usb_interface *iface;
771 struct usb_endpoint_descriptor *ep = NULL;
773 iface = &dev->config.if_desc[ifnum];
775 if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
777 /* Some hubs have a subclass of 1, which AFAICT according to the */
778 /* specs is not defined, but it works */
779 if ((iface->desc.bInterfaceSubClass != 0) &&
780 (iface->desc.bInterfaceSubClass != 1))
782 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
783 if (iface->desc.bNumEndpoints != 1)
785 ep = &iface->ep_desc[0];
786 /* Output endpoint? Curiousier and curiousier.. */
787 if (!(ep->bEndpointAddress & USB_DIR_IN))
789 /* If it's not an interrupt endpoint, we'd better punt! */
790 if ((ep->bmAttributes & 3) != 3)
793 debug("USB hub found\n");
797 debug("USB hub not found: bInterfaceClass=%d, bInterfaceSubClass=%d, bNumEndpoints=%d\n",
798 iface->desc.bInterfaceClass, iface->desc.bInterfaceSubClass,
799 iface->desc.bNumEndpoints);
801 debug(" bEndpointAddress=%#x, bmAttributes=%d",
802 ep->bEndpointAddress, ep->bmAttributes);
808 int usb_hub_probe(struct usb_device *dev, int ifnum)
812 ret = usb_hub_check(dev, ifnum);
815 ret = usb_hub_configure(dev);
820 int usb_hub_scan(struct udevice *hub)
822 struct usb_device *udev = dev_get_parent_priv(hub);
824 return usb_hub_configure(udev);
827 static int usb_hub_post_probe(struct udevice *dev)
829 debug("%s\n", __func__);
830 return usb_hub_scan(dev);
833 static const struct udevice_id usb_hub_ids[] = {
834 { .compatible = "usb-hub" },
838 U_BOOT_DRIVER(usb_generic_hub) = {
840 .id = UCLASS_USB_HUB,
841 .of_match = usb_hub_ids,
842 .flags = DM_FLAG_ALLOC_PRIV_DMA,
845 UCLASS_DRIVER(usb_hub) = {
846 .id = UCLASS_USB_HUB,
848 .post_bind = dm_scan_fdt_dev,
849 .post_probe = usb_hub_post_probe,
850 .child_pre_probe = usb_child_pre_probe,
851 .per_child_auto_alloc_size = sizeof(struct usb_device),
852 .per_child_platdata_auto_alloc_size = sizeof(struct usb_dev_platdata),
853 .per_device_auto_alloc_size = sizeof(struct usb_hub_device),
856 static const struct usb_device_id hub_id_table[] = {
858 .match_flags = USB_DEVICE_ID_MATCH_DEV_CLASS,
859 .bDeviceClass = USB_CLASS_HUB
861 { } /* Terminating entry */
864 U_BOOT_USB_DEVICE(usb_generic_hub, hub_id_table);