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 /* TODO(sjg@chromium.org): Remove this when CONFIG_DM_USB is defined */
59 static struct usb_hub_device hub_dev
[USB_MAX_HUB
];
60 static int usb_hub_index
;
61 static LIST_HEAD(usb_scan_list
);
63 __weak
void usb_hub_reset_devices(int port
)
68 static inline bool usb_hub_is_superspeed(struct usb_device
*hdev
)
70 return hdev
->descriptor
.bDeviceProtocol
== 3;
73 static int usb_get_hub_descriptor(struct usb_device
*dev
, void *data
, int size
)
75 unsigned short dtype
= USB_DT_HUB
;
77 if (usb_hub_is_superspeed(dev
))
78 dtype
= USB_DT_SS_HUB
;
80 return usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
81 USB_REQ_GET_DESCRIPTOR
, USB_DIR_IN
| USB_RT_HUB
,
82 dtype
<< 8, 0, data
, size
, USB_CNTL_TIMEOUT
);
85 static int usb_clear_port_feature(struct usb_device
*dev
, int port
, int feature
)
87 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
88 USB_REQ_CLEAR_FEATURE
, USB_RT_PORT
, feature
,
89 port
, NULL
, 0, USB_CNTL_TIMEOUT
);
92 static int usb_set_port_feature(struct usb_device
*dev
, int port
, int feature
)
94 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
95 USB_REQ_SET_FEATURE
, USB_RT_PORT
, feature
,
96 port
, NULL
, 0, USB_CNTL_TIMEOUT
);
99 static int usb_get_hub_status(struct usb_device
*dev
, void *data
)
101 return usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
102 USB_REQ_GET_STATUS
, USB_DIR_IN
| USB_RT_HUB
, 0, 0,
103 data
, sizeof(struct usb_hub_status
), USB_CNTL_TIMEOUT
);
106 int usb_get_port_status(struct usb_device
*dev
, int port
, void *data
)
108 return usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
109 USB_REQ_GET_STATUS
, USB_DIR_IN
| USB_RT_PORT
, 0, port
,
110 data
, sizeof(struct usb_port_status
), USB_CNTL_TIMEOUT
);
114 static void usb_hub_power_on(struct usb_hub_device
*hub
)
117 struct usb_device
*dev
;
118 unsigned pgood_delay
= hub
->desc
.bPwrOn2PwrGood
* 2;
123 debug("enabling power on all ports\n");
124 for (i
= 0; i
< dev
->maxchild
; i
++) {
125 usb_set_port_feature(dev
, i
+ 1, USB_PORT_FEAT_POWER
);
126 debug("port %d returns %lX\n", i
+ 1, dev
->status
);
129 #ifdef CONFIG_SANDBOX
131 * Don't set timeout / delay values here. This results
132 * in these values still being reset to 0.
134 if (state_get_skip_delays())
139 * Wait for power to become stable,
140 * plus spec-defined max time for device to connect
141 * but allow this time to be increased via env variable as some
142 * devices break the spec and require longer warm-up times
144 env
= getenv("usb_pgood_delay");
146 pgood_delay
= max(pgood_delay
,
147 (unsigned)simple_strtol(env
, NULL
, 0));
148 debug("pgood_delay=%dms\n", pgood_delay
);
151 * Do a minimum delay of the larger value of 100ms or pgood_delay
152 * so that the power can stablize before the devices are queried
154 hub
->query_delay
= get_timer(0) + max(100, (int)pgood_delay
);
157 * Record the power-on timeout here. The max. delay (timeout)
158 * will be done based on this value in the USB port loop in
159 * usb_hub_configure() later.
161 hub
->connect_timeout
= hub
->query_delay
+ 1000;
162 debug("devnum=%d poweron: query_delay=%d connect_timeout=%d\n",
163 dev
->devnum
, max(100, (int)pgood_delay
),
164 max(100, (int)pgood_delay
) + 1000);
167 void usb_hub_reset(void)
171 /* Zero out global hub_dev in case its re-used again */
172 memset(hub_dev
, 0, sizeof(hub_dev
));
175 static struct usb_hub_device
*usb_hub_allocate(void)
177 if (usb_hub_index
< USB_MAX_HUB
)
178 return &hub_dev
[usb_hub_index
++];
180 printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB
);
186 static inline char *portspeed(int portstatus
)
190 switch (portstatus
& USB_PORT_STAT_SPEED_MASK
) {
191 case USB_PORT_STAT_SUPER_SPEED
:
192 speed_str
= "5 Gb/s";
194 case USB_PORT_STAT_HIGH_SPEED
:
195 speed_str
= "480 Mb/s";
197 case USB_PORT_STAT_LOW_SPEED
:
198 speed_str
= "1.5 Mb/s";
201 speed_str
= "12 Mb/s";
208 int legacy_hub_port_reset(struct usb_device
*dev
, int port
,
209 unsigned short *portstat
)
212 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status
, portsts
, 1);
213 unsigned short portstatus
, portchange
;
214 int delay
= HUB_SHORT_RESET_TIME
; /* start with short reset delay */
217 debug("%s: resetting '%s' port %d...\n", __func__
, dev
->dev
->name
,
220 debug("%s: resetting port %d...\n", __func__
, port
+ 1);
222 for (tries
= 0; tries
< MAX_TRIES
; tries
++) {
223 err
= usb_set_port_feature(dev
, port
+ 1, USB_PORT_FEAT_RESET
);
229 if (usb_get_port_status(dev
, port
+ 1, portsts
) < 0) {
230 debug("get_port_status failed status %lX\n",
234 portstatus
= le16_to_cpu(portsts
->wPortStatus
);
235 portchange
= le16_to_cpu(portsts
->wPortChange
);
237 debug("portstatus %x, change %x, %s\n", portstatus
, portchange
,
238 portspeed(portstatus
));
240 debug("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
241 " USB_PORT_STAT_ENABLE %d\n",
242 (portchange
& USB_PORT_STAT_C_CONNECTION
) ? 1 : 0,
243 (portstatus
& USB_PORT_STAT_CONNECTION
) ? 1 : 0,
244 (portstatus
& USB_PORT_STAT_ENABLE
) ? 1 : 0);
247 * Perhaps we should check for the following here:
248 * - C_CONNECTION hasn't been set.
249 * - CONNECTION is still set.
251 * Doing so would ensure that the device is still connected
252 * to the bus, and hasn't been unplugged or replaced while the
253 * USB bus reset was going on.
255 * However, if we do that, then (at least) a San Disk Ultra
256 * USB 3.0 16GB device fails to reset on (at least) an NVIDIA
257 * Tegra Jetson TK1 board. For some reason, the device appears
258 * to briefly drop off the bus when this second bus reset is
259 * executed, yet if we retry this loop, it'll eventually come
260 * back after another reset or two.
263 if (portstatus
& USB_PORT_STAT_ENABLE
)
266 /* Switch to long reset delay for the next round */
267 delay
= HUB_LONG_RESET_TIME
;
270 if (tries
== MAX_TRIES
) {
271 debug("Cannot enable port %i after %i retries, " \
272 "disabling port.\n", port
+ 1, MAX_TRIES
);
273 debug("Maybe the USB cable is bad?\n");
277 usb_clear_port_feature(dev
, port
+ 1, USB_PORT_FEAT_C_RESET
);
278 *portstat
= portstatus
;
283 int hub_port_reset(struct udevice
*dev
, int port
, unsigned short *portstat
)
285 struct usb_device
*udev
= dev_get_parent_priv(dev
);
287 return legacy_hub_port_reset(udev
, port
, portstat
);
291 int usb_hub_port_connect_change(struct usb_device
*dev
, int port
)
293 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status
, portsts
, 1);
294 unsigned short portstatus
;
298 ret
= usb_get_port_status(dev
, port
+ 1, portsts
);
300 debug("get_port_status failed\n");
304 portstatus
= le16_to_cpu(portsts
->wPortStatus
);
305 debug("portstatus %x, change %x, %s\n",
307 le16_to_cpu(portsts
->wPortChange
),
308 portspeed(portstatus
));
310 /* Clear the connection change status */
311 usb_clear_port_feature(dev
, port
+ 1, USB_PORT_FEAT_C_CONNECTION
);
313 /* Disconnect any existing devices under this port */
314 if (((!(portstatus
& USB_PORT_STAT_CONNECTION
)) &&
315 (!(portstatus
& USB_PORT_STAT_ENABLE
))) ||
316 usb_device_has_child_on_port(dev
, port
)) {
317 debug("usb_disconnect(&hub->children[port]);\n");
318 /* Return now if nothing is connected */
319 if (!(portstatus
& USB_PORT_STAT_CONNECTION
))
324 ret
= legacy_hub_port_reset(dev
, port
, &portstatus
);
327 printf("cannot reset port %i!?\n", port
+ 1);
331 switch (portstatus
& USB_PORT_STAT_SPEED_MASK
) {
332 case USB_PORT_STAT_SUPER_SPEED
:
333 speed
= USB_SPEED_SUPER
;
335 case USB_PORT_STAT_HIGH_SPEED
:
336 speed
= USB_SPEED_HIGH
;
338 case USB_PORT_STAT_LOW_SPEED
:
339 speed
= USB_SPEED_LOW
;
342 speed
= USB_SPEED_FULL
;
347 struct udevice
*child
;
349 ret
= usb_scan_device(dev
->dev
, port
+ 1, speed
, &child
);
351 struct usb_device
*usb
;
353 ret
= usb_alloc_new_device(dev
->controller
, &usb
);
355 printf("cannot create new device: ret=%d", ret
);
359 dev
->children
[port
] = usb
;
362 usb
->portnr
= port
+ 1;
363 /* Run it through the hoops (find a driver, etc) */
364 ret
= usb_new_device(usb
);
366 /* Woops, disable the port */
367 usb_free_device(dev
->controller
);
368 dev
->children
[port
] = NULL
;
372 debug("hub: disabling port %d\n", port
+ 1);
373 usb_clear_port_feature(dev
, port
+ 1, USB_PORT_FEAT_ENABLE
);
379 static int usb_scan_port(struct usb_device_scan
*usb_scan
)
381 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status
, portsts
, 1);
382 unsigned short portstatus
;
383 unsigned short portchange
;
384 struct usb_device
*dev
;
385 struct usb_hub_device
*hub
;
394 * Don't talk to the device before the query delay is expired.
395 * This is needed for voltages to stabalize.
397 if (get_timer(0) < hub
->query_delay
)
400 ret
= usb_get_port_status(dev
, i
+ 1, portsts
);
402 debug("get_port_status failed\n");
403 if (get_timer(0) >= hub
->connect_timeout
) {
404 debug("devnum=%d port=%d: timeout\n",
406 /* Remove this device from scanning list */
407 list_del(&usb_scan
->list
);
414 portstatus
= le16_to_cpu(portsts
->wPortStatus
);
415 portchange
= le16_to_cpu(portsts
->wPortChange
);
416 debug("Port %d Status %X Change %X\n", i
+ 1, portstatus
, portchange
);
419 * No connection change happened, wait a bit more.
421 * For some situation, the hub reports no connection change but a
422 * device is connected to the port (eg: CCS bit is set but CSC is not
423 * in the PORTSC register of a root hub), ignore such case.
425 if (!(portchange
& USB_PORT_STAT_C_CONNECTION
) &&
426 !(portstatus
& USB_PORT_STAT_CONNECTION
)) {
427 if (get_timer(0) >= hub
->connect_timeout
) {
428 debug("devnum=%d port=%d: timeout\n",
430 /* Remove this device from scanning list */
431 list_del(&usb_scan
->list
);
438 /* A new USB device is ready at this point */
439 debug("devnum=%d port=%d: USB dev found\n", dev
->devnum
, i
+ 1);
441 usb_hub_port_connect_change(dev
, i
);
443 if (portchange
& USB_PORT_STAT_C_ENABLE
) {
444 debug("port %d enable change, status %x\n", i
+ 1, portstatus
);
445 usb_clear_port_feature(dev
, i
+ 1, USB_PORT_FEAT_C_ENABLE
);
447 * The following hack causes a ghost device problem
450 #ifndef CONFIG_USB_EHCI_FARADAY
452 * EM interference sometimes causes bad shielded USB
453 * devices to be shutdown by the hub, this hack enables
454 * them again. Works at least with mouse driver
456 if (!(portstatus
& USB_PORT_STAT_ENABLE
) &&
457 (portstatus
& USB_PORT_STAT_CONNECTION
) &&
458 usb_device_has_child_on_port(dev
, i
)) {
459 debug("already running port %i disabled by hub (EMI?), re-enabling...\n",
461 usb_hub_port_connect_change(dev
, i
);
466 if (portstatus
& USB_PORT_STAT_SUSPEND
) {
467 debug("port %d suspend change\n", i
+ 1);
468 usb_clear_port_feature(dev
, i
+ 1, USB_PORT_FEAT_SUSPEND
);
471 if (portchange
& USB_PORT_STAT_C_OVERCURRENT
) {
472 debug("port %d over-current change\n", i
+ 1);
473 usb_clear_port_feature(dev
, i
+ 1,
474 USB_PORT_FEAT_C_OVER_CURRENT
);
475 /* Only power-on this one port */
476 usb_set_port_feature(dev
, i
+ 1, USB_PORT_FEAT_POWER
);
477 hub
->overcurrent_count
[i
]++;
480 * If the max-scan-count is not reached, return without removing
481 * the device from scan-list. This will re-issue a new scan.
483 if (hub
->overcurrent_count
[i
] <=
484 PORT_OVERCURRENT_MAX_SCAN_COUNT
)
487 /* Otherwise the device will get removed */
488 printf("Port %d over-current occurred %d times\n", i
+ 1,
489 hub
->overcurrent_count
[i
]);
492 if (portchange
& USB_PORT_STAT_C_RESET
) {
493 debug("port %d reset change\n", i
+ 1);
494 usb_clear_port_feature(dev
, i
+ 1, USB_PORT_FEAT_C_RESET
);
498 * We're done with this device, so let's remove this device from
501 list_del(&usb_scan
->list
);
507 static int usb_device_list_scan(void)
509 struct usb_device_scan
*usb_scan
;
510 struct usb_device_scan
*tmp
;
514 /* Only run this loop once for each controller */
521 /* We're done, once the list is empty again */
522 if (list_empty(&usb_scan_list
))
525 list_for_each_entry_safe(usb_scan
, tmp
, &usb_scan_list
, list
) {
529 ret
= usb_scan_port(usb_scan
);
537 * This USB controller has finished scanning all its connected
538 * USB devices. Set "running" back to 0, so that other USB controllers
539 * will scan their devices too.
546 static int usb_hub_configure(struct usb_device
*dev
)
549 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, USB_BUFSIZ
);
550 unsigned char *bitmap
;
551 short hubCharacteristics
;
552 struct usb_hub_descriptor
*descriptor
;
553 struct usb_hub_device
*hub
;
554 __maybe_unused
struct usb_hub_status
*hubsts
;
557 /* "allocate" Hub device */
558 hub
= usb_hub_allocate();
562 /* Get the the hub descriptor */
563 ret
= usb_get_hub_descriptor(dev
, buffer
, 4);
565 debug("usb_hub_configure: failed to get hub " \
566 "descriptor, giving up %lX\n", dev
->status
);
569 descriptor
= (struct usb_hub_descriptor
*)buffer
;
571 length
= min_t(int, descriptor
->bLength
,
572 sizeof(struct usb_hub_descriptor
));
574 ret
= usb_get_hub_descriptor(dev
, buffer
, length
);
576 debug("usb_hub_configure: failed to get hub " \
577 "descriptor 2nd giving up %lX\n", dev
->status
);
580 memcpy((unsigned char *)&hub
->desc
, buffer
, length
);
581 /* adjust 16bit values */
582 put_unaligned(le16_to_cpu(get_unaligned(
583 &descriptor
->wHubCharacteristics
)),
584 &hub
->desc
.wHubCharacteristics
);
586 bitmap
= (unsigned char *)&hub
->desc
.DeviceRemovable
[0];
587 /* devices not removable by default */
588 memset(bitmap
, 0xff, (USB_MAXCHILDREN
+1+7)/8);
589 bitmap
= (unsigned char *)&hub
->desc
.PortPowerCtrlMask
[0];
590 memset(bitmap
, 0xff, (USB_MAXCHILDREN
+1+7)/8); /* PowerMask = 1B */
592 for (i
= 0; i
< ((hub
->desc
.bNbrPorts
+ 1 + 7)/8); i
++)
593 hub
->desc
.DeviceRemovable
[i
] = descriptor
->DeviceRemovable
[i
];
595 for (i
= 0; i
< ((hub
->desc
.bNbrPorts
+ 1 + 7)/8); i
++)
596 hub
->desc
.PortPowerCtrlMask
[i
] = descriptor
->PortPowerCtrlMask
[i
];
598 dev
->maxchild
= descriptor
->bNbrPorts
;
599 debug("%d ports detected\n", dev
->maxchild
);
601 hubCharacteristics
= get_unaligned(&hub
->desc
.wHubCharacteristics
);
602 switch (hubCharacteristics
& HUB_CHAR_LPSM
) {
604 debug("ganged power switching\n");
607 debug("individual port power switching\n");
611 debug("unknown reserved power switching mode\n");
615 if (hubCharacteristics
& HUB_CHAR_COMPOUND
)
616 debug("part of a compound device\n");
618 debug("standalone hub\n");
620 switch (hubCharacteristics
& HUB_CHAR_OCPM
) {
622 debug("global over-current protection\n");
625 debug("individual port over-current protection\n");
629 debug("no over-current protection\n");
633 debug("power on to power good time: %dms\n",
634 descriptor
->bPwrOn2PwrGood
* 2);
635 debug("hub controller current requirement: %dmA\n",
636 descriptor
->bHubContrCurrent
);
638 for (i
= 0; i
< dev
->maxchild
; i
++)
639 debug("port %d is%s removable\n", i
+ 1,
640 hub
->desc
.DeviceRemovable
[(i
+ 1) / 8] & \
641 (1 << ((i
+ 1) % 8)) ? " not" : "");
643 if (sizeof(struct usb_hub_status
) > USB_BUFSIZ
) {
644 debug("usb_hub_configure: failed to get Status - " \
645 "too long: %d\n", descriptor
->bLength
);
649 ret
= usb_get_hub_status(dev
, buffer
);
651 debug("usb_hub_configure: failed to get Status %lX\n",
657 hubsts
= (struct usb_hub_status
*)buffer
;
660 debug("get_hub_status returned status %X, change %X\n",
661 le16_to_cpu(hubsts
->wHubStatus
),
662 le16_to_cpu(hubsts
->wHubChange
));
663 debug("local power source is %s\n",
664 (le16_to_cpu(hubsts
->wHubStatus
) & HUB_STATUS_LOCAL_POWER
) ? \
665 "lost (inactive)" : "good");
666 debug("%sover-current condition exists\n",
667 (le16_to_cpu(hubsts
->wHubStatus
) & HUB_STATUS_OVERCURRENT
) ? \
669 usb_hub_power_on(hub
);
672 * Reset any devices that may be in a bad state when applying
673 * the power. This is a __weak function. Resetting of the devices
674 * should occur in the board file of the device.
676 for (i
= 0; i
< dev
->maxchild
; i
++)
677 usb_hub_reset_devices(i
+ 1);
680 * Only add the connected USB devices, including potential hubs,
681 * to a scanning list. This list will get scanned and devices that
682 * are detected (either via port connected or via port timeout)
683 * will get removed from this list. Scanning of the devices on this
684 * list will continue until all devices are removed.
686 for (i
= 0; i
< dev
->maxchild
; i
++) {
687 struct usb_device_scan
*usb_scan
;
689 usb_scan
= calloc(1, sizeof(*usb_scan
));
691 printf("Can't allocate memory for USB device!\n");
697 list_add_tail(&usb_scan
->list
, &usb_scan_list
);
701 * And now call the scanning code which loops over the generated list
703 ret
= usb_device_list_scan();
708 static int usb_hub_check(struct usb_device
*dev
, int ifnum
)
710 struct usb_interface
*iface
;
711 struct usb_endpoint_descriptor
*ep
= NULL
;
713 iface
= &dev
->config
.if_desc
[ifnum
];
715 if (iface
->desc
.bInterfaceClass
!= USB_CLASS_HUB
)
717 /* Some hubs have a subclass of 1, which AFAICT according to the */
718 /* specs is not defined, but it works */
719 if ((iface
->desc
.bInterfaceSubClass
!= 0) &&
720 (iface
->desc
.bInterfaceSubClass
!= 1))
722 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
723 if (iface
->desc
.bNumEndpoints
!= 1)
725 ep
= &iface
->ep_desc
[0];
726 /* Output endpoint? Curiousier and curiousier.. */
727 if (!(ep
->bEndpointAddress
& USB_DIR_IN
))
729 /* If it's not an interrupt endpoint, we'd better punt! */
730 if ((ep
->bmAttributes
& 3) != 3)
733 debug("USB hub found\n");
737 debug("USB hub not found: bInterfaceClass=%d, bInterfaceSubClass=%d, bNumEndpoints=%d\n",
738 iface
->desc
.bInterfaceClass
, iface
->desc
.bInterfaceSubClass
,
739 iface
->desc
.bNumEndpoints
);
741 debug(" bEndpointAddress=%#x, bmAttributes=%d",
742 ep
->bEndpointAddress
, ep
->bmAttributes
);
748 int usb_hub_probe(struct usb_device
*dev
, int ifnum
)
752 ret
= usb_hub_check(dev
, ifnum
);
755 ret
= usb_hub_configure(dev
);
760 int usb_hub_scan(struct udevice
*hub
)
762 struct usb_device
*udev
= dev_get_parent_priv(hub
);
764 return usb_hub_configure(udev
);
767 static int usb_hub_post_probe(struct udevice
*dev
)
769 debug("%s\n", __func__
);
770 return usb_hub_scan(dev
);
773 static const struct udevice_id usb_hub_ids
[] = {
774 { .compatible
= "usb-hub" },
778 U_BOOT_DRIVER(usb_generic_hub
) = {
780 .id
= UCLASS_USB_HUB
,
781 .of_match
= usb_hub_ids
,
782 .flags
= DM_FLAG_ALLOC_PRIV_DMA
,
785 UCLASS_DRIVER(usb_hub
) = {
786 .id
= UCLASS_USB_HUB
,
788 .post_bind
= dm_scan_fdt_dev
,
789 .post_probe
= usb_hub_post_probe
,
790 .child_pre_probe
= usb_child_pre_probe
,
791 .per_child_auto_alloc_size
= sizeof(struct usb_device
),
792 .per_child_platdata_auto_alloc_size
= sizeof(struct usb_dev_platdata
),
795 static const struct usb_device_id hub_id_table
[] = {
797 .match_flags
= USB_DEVICE_ID_MATCH_DEV_CLASS
,
798 .bDeviceClass
= USB_CLASS_HUB
800 { } /* Terminating entry */
803 U_BOOT_USB_DEVICE(usb_generic_hub
, hub_id_table
);