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 int usb_get_hub_descriptor(struct usb_device
*dev
, void *data
, int size
)
70 return usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
71 USB_REQ_GET_DESCRIPTOR
, USB_DIR_IN
| USB_RT_HUB
,
72 USB_DT_HUB
<< 8, 0, data
, size
, USB_CNTL_TIMEOUT
);
75 static int usb_clear_port_feature(struct usb_device
*dev
, int port
, int feature
)
77 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
78 USB_REQ_CLEAR_FEATURE
, USB_RT_PORT
, feature
,
79 port
, NULL
, 0, USB_CNTL_TIMEOUT
);
82 static int usb_set_port_feature(struct usb_device
*dev
, int port
, int feature
)
84 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
85 USB_REQ_SET_FEATURE
, USB_RT_PORT
, feature
,
86 port
, NULL
, 0, USB_CNTL_TIMEOUT
);
89 static int usb_get_hub_status(struct usb_device
*dev
, void *data
)
91 return usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
92 USB_REQ_GET_STATUS
, USB_DIR_IN
| USB_RT_HUB
, 0, 0,
93 data
, sizeof(struct usb_hub_status
), USB_CNTL_TIMEOUT
);
96 int usb_get_port_status(struct usb_device
*dev
, int port
, void *data
)
98 return usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
99 USB_REQ_GET_STATUS
, USB_DIR_IN
| USB_RT_PORT
, 0, port
,
100 data
, sizeof(struct usb_hub_status
), USB_CNTL_TIMEOUT
);
104 static void usb_hub_power_on(struct usb_hub_device
*hub
)
107 struct usb_device
*dev
;
108 unsigned pgood_delay
= hub
->desc
.bPwrOn2PwrGood
* 2;
113 debug("enabling power on all ports\n");
114 for (i
= 0; i
< dev
->maxchild
; i
++) {
115 usb_set_port_feature(dev
, i
+ 1, USB_PORT_FEAT_POWER
);
116 debug("port %d returns %lX\n", i
+ 1, dev
->status
);
119 #ifdef CONFIG_SANDBOX
121 * Don't set timeout / delay values here. This results
122 * in these values still being reset to 0.
124 if (state_get_skip_delays())
129 * Wait for power to become stable,
130 * plus spec-defined max time for device to connect
131 * but allow this time to be increased via env variable as some
132 * devices break the spec and require longer warm-up times
134 env
= getenv("usb_pgood_delay");
136 pgood_delay
= max(pgood_delay
,
137 (unsigned)simple_strtol(env
, NULL
, 0));
138 debug("pgood_delay=%dms\n", pgood_delay
);
141 * Do a minimum delay of the larger value of 100ms or pgood_delay
142 * so that the power can stablize before the devices are queried
144 hub
->query_delay
= get_timer(0) + max(100, (int)pgood_delay
);
147 * Record the power-on timeout here. The max. delay (timeout)
148 * will be done based on this value in the USB port loop in
149 * usb_hub_configure() later.
151 hub
->connect_timeout
= hub
->query_delay
+ 1000;
152 debug("devnum=%d poweron: query_delay=%d connect_timeout=%d\n",
153 dev
->devnum
, max(100, (int)pgood_delay
),
154 max(100, (int)pgood_delay
) + 1000);
157 void usb_hub_reset(void)
161 /* Zero out global hub_dev in case its re-used again */
162 memset(hub_dev
, 0, sizeof(hub_dev
));
165 static struct usb_hub_device
*usb_hub_allocate(void)
167 if (usb_hub_index
< USB_MAX_HUB
)
168 return &hub_dev
[usb_hub_index
++];
170 printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB
);
176 static inline char *portspeed(int portstatus
)
180 switch (portstatus
& USB_PORT_STAT_SPEED_MASK
) {
181 case USB_PORT_STAT_SUPER_SPEED
:
182 speed_str
= "5 Gb/s";
184 case USB_PORT_STAT_HIGH_SPEED
:
185 speed_str
= "480 Mb/s";
187 case USB_PORT_STAT_LOW_SPEED
:
188 speed_str
= "1.5 Mb/s";
191 speed_str
= "12 Mb/s";
198 int legacy_hub_port_reset(struct usb_device
*dev
, int port
,
199 unsigned short *portstat
)
202 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status
, portsts
, 1);
203 unsigned short portstatus
, portchange
;
204 int delay
= HUB_SHORT_RESET_TIME
; /* start with short reset delay */
207 debug("%s: resetting '%s' port %d...\n", __func__
, dev
->dev
->name
,
210 debug("%s: resetting port %d...\n", __func__
, port
+ 1);
212 for (tries
= 0; tries
< MAX_TRIES
; tries
++) {
213 err
= usb_set_port_feature(dev
, port
+ 1, USB_PORT_FEAT_RESET
);
219 if (usb_get_port_status(dev
, port
+ 1, portsts
) < 0) {
220 debug("get_port_status failed status %lX\n",
224 portstatus
= le16_to_cpu(portsts
->wPortStatus
);
225 portchange
= le16_to_cpu(portsts
->wPortChange
);
227 debug("portstatus %x, change %x, %s\n", portstatus
, portchange
,
228 portspeed(portstatus
));
230 debug("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
231 " USB_PORT_STAT_ENABLE %d\n",
232 (portchange
& USB_PORT_STAT_C_CONNECTION
) ? 1 : 0,
233 (portstatus
& USB_PORT_STAT_CONNECTION
) ? 1 : 0,
234 (portstatus
& USB_PORT_STAT_ENABLE
) ? 1 : 0);
237 * Perhaps we should check for the following here:
238 * - C_CONNECTION hasn't been set.
239 * - CONNECTION is still set.
241 * Doing so would ensure that the device is still connected
242 * to the bus, and hasn't been unplugged or replaced while the
243 * USB bus reset was going on.
245 * However, if we do that, then (at least) a San Disk Ultra
246 * USB 3.0 16GB device fails to reset on (at least) an NVIDIA
247 * Tegra Jetson TK1 board. For some reason, the device appears
248 * to briefly drop off the bus when this second bus reset is
249 * executed, yet if we retry this loop, it'll eventually come
250 * back after another reset or two.
253 if (portstatus
& USB_PORT_STAT_ENABLE
)
256 /* Switch to long reset delay for the next round */
257 delay
= HUB_LONG_RESET_TIME
;
260 if (tries
== MAX_TRIES
) {
261 debug("Cannot enable port %i after %i retries, " \
262 "disabling port.\n", port
+ 1, MAX_TRIES
);
263 debug("Maybe the USB cable is bad?\n");
267 usb_clear_port_feature(dev
, port
+ 1, USB_PORT_FEAT_C_RESET
);
268 *portstat
= portstatus
;
273 int hub_port_reset(struct udevice
*dev
, int port
, unsigned short *portstat
)
275 struct usb_device
*udev
= dev_get_parent_priv(dev
);
277 return legacy_hub_port_reset(udev
, port
, portstat
);
281 int usb_hub_port_connect_change(struct usb_device
*dev
, int port
)
283 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status
, portsts
, 1);
284 unsigned short portstatus
;
288 ret
= usb_get_port_status(dev
, port
+ 1, portsts
);
290 debug("get_port_status failed\n");
294 portstatus
= le16_to_cpu(portsts
->wPortStatus
);
295 debug("portstatus %x, change %x, %s\n",
297 le16_to_cpu(portsts
->wPortChange
),
298 portspeed(portstatus
));
300 /* Clear the connection change status */
301 usb_clear_port_feature(dev
, port
+ 1, USB_PORT_FEAT_C_CONNECTION
);
303 /* Disconnect any existing devices under this port */
304 if (((!(portstatus
& USB_PORT_STAT_CONNECTION
)) &&
305 (!(portstatus
& USB_PORT_STAT_ENABLE
))) ||
306 usb_device_has_child_on_port(dev
, port
)) {
307 debug("usb_disconnect(&hub->children[port]);\n");
308 /* Return now if nothing is connected */
309 if (!(portstatus
& USB_PORT_STAT_CONNECTION
))
314 ret
= legacy_hub_port_reset(dev
, port
, &portstatus
);
317 printf("cannot reset port %i!?\n", port
+ 1);
321 switch (portstatus
& USB_PORT_STAT_SPEED_MASK
) {
322 case USB_PORT_STAT_SUPER_SPEED
:
323 speed
= USB_SPEED_SUPER
;
325 case USB_PORT_STAT_HIGH_SPEED
:
326 speed
= USB_SPEED_HIGH
;
328 case USB_PORT_STAT_LOW_SPEED
:
329 speed
= USB_SPEED_LOW
;
332 speed
= USB_SPEED_FULL
;
337 struct udevice
*child
;
339 ret
= usb_scan_device(dev
->dev
, port
+ 1, speed
, &child
);
341 struct usb_device
*usb
;
343 ret
= usb_alloc_new_device(dev
->controller
, &usb
);
345 printf("cannot create new device: ret=%d", ret
);
349 dev
->children
[port
] = usb
;
352 usb
->portnr
= port
+ 1;
353 /* Run it through the hoops (find a driver, etc) */
354 ret
= usb_new_device(usb
);
356 /* Woops, disable the port */
357 usb_free_device(dev
->controller
);
358 dev
->children
[port
] = NULL
;
362 debug("hub: disabling port %d\n", port
+ 1);
363 usb_clear_port_feature(dev
, port
+ 1, USB_PORT_FEAT_ENABLE
);
369 static int usb_scan_port(struct usb_device_scan
*usb_scan
)
371 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status
, portsts
, 1);
372 unsigned short portstatus
;
373 unsigned short portchange
;
374 struct usb_device
*dev
;
375 struct usb_hub_device
*hub
;
384 * Don't talk to the device before the query delay is expired.
385 * This is needed for voltages to stabalize.
387 if (get_timer(0) < hub
->query_delay
)
390 ret
= usb_get_port_status(dev
, i
+ 1, portsts
);
392 debug("get_port_status failed\n");
393 if (get_timer(0) >= hub
->connect_timeout
) {
394 debug("devnum=%d port=%d: timeout\n",
396 /* Remove this device from scanning list */
397 list_del(&usb_scan
->list
);
404 portstatus
= le16_to_cpu(portsts
->wPortStatus
);
405 portchange
= le16_to_cpu(portsts
->wPortChange
);
406 debug("Port %d Status %X Change %X\n", i
+ 1, portstatus
, portchange
);
408 /* No connection change happened, wait a bit more. */
409 if (!(portchange
& USB_PORT_STAT_C_CONNECTION
)) {
410 if (get_timer(0) >= hub
->connect_timeout
) {
411 debug("devnum=%d port=%d: timeout\n",
413 /* Remove this device from scanning list */
414 list_del(&usb_scan
->list
);
421 /* Test if the connection came up, and if not exit */
422 if (!(portstatus
& USB_PORT_STAT_CONNECTION
))
425 /* A new USB device is ready at this point */
426 debug("devnum=%d port=%d: USB dev found\n", dev
->devnum
, i
+ 1);
428 usb_hub_port_connect_change(dev
, i
);
430 if (portchange
& USB_PORT_STAT_C_ENABLE
) {
431 debug("port %d enable change, status %x\n", i
+ 1, portstatus
);
432 usb_clear_port_feature(dev
, i
+ 1, USB_PORT_FEAT_C_ENABLE
);
434 * The following hack causes a ghost device problem
437 #ifndef CONFIG_USB_EHCI_FARADAY
439 * EM interference sometimes causes bad shielded USB
440 * devices to be shutdown by the hub, this hack enables
441 * them again. Works at least with mouse driver
443 if (!(portstatus
& USB_PORT_STAT_ENABLE
) &&
444 (portstatus
& USB_PORT_STAT_CONNECTION
) &&
445 usb_device_has_child_on_port(dev
, i
)) {
446 debug("already running port %i disabled by hub (EMI?), re-enabling...\n",
448 usb_hub_port_connect_change(dev
, i
);
453 if (portstatus
& USB_PORT_STAT_SUSPEND
) {
454 debug("port %d suspend change\n", i
+ 1);
455 usb_clear_port_feature(dev
, i
+ 1, USB_PORT_FEAT_SUSPEND
);
458 if (portchange
& USB_PORT_STAT_C_OVERCURRENT
) {
459 debug("port %d over-current change\n", i
+ 1);
460 usb_clear_port_feature(dev
, i
+ 1,
461 USB_PORT_FEAT_C_OVER_CURRENT
);
462 /* Only power-on this one port */
463 usb_set_port_feature(dev
, i
+ 1, USB_PORT_FEAT_POWER
);
464 hub
->overcurrent_count
[i
]++;
467 * If the max-scan-count is not reached, return without removing
468 * the device from scan-list. This will re-issue a new scan.
470 if (hub
->overcurrent_count
[i
] <=
471 PORT_OVERCURRENT_MAX_SCAN_COUNT
)
474 /* Otherwise the device will get removed */
475 printf("Port %d over-current occurred %d times\n", i
+ 1,
476 hub
->overcurrent_count
[i
]);
479 if (portchange
& USB_PORT_STAT_C_RESET
) {
480 debug("port %d reset change\n", i
+ 1);
481 usb_clear_port_feature(dev
, i
+ 1, USB_PORT_FEAT_C_RESET
);
485 * We're done with this device, so let's remove this device from
488 list_del(&usb_scan
->list
);
494 static int usb_device_list_scan(void)
496 struct usb_device_scan
*usb_scan
;
497 struct usb_device_scan
*tmp
;
501 /* Only run this loop once for each controller */
508 /* We're done, once the list is empty again */
509 if (list_empty(&usb_scan_list
))
512 list_for_each_entry_safe(usb_scan
, tmp
, &usb_scan_list
, list
) {
516 ret
= usb_scan_port(usb_scan
);
524 * This USB controller has finished scanning all its connected
525 * USB devices. Set "running" back to 0, so that other USB controllers
526 * will scan their devices too.
533 static int usb_hub_configure(struct usb_device
*dev
)
536 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, USB_BUFSIZ
);
537 unsigned char *bitmap
;
538 short hubCharacteristics
;
539 struct usb_hub_descriptor
*descriptor
;
540 struct usb_hub_device
*hub
;
541 __maybe_unused
struct usb_hub_status
*hubsts
;
544 /* "allocate" Hub device */
545 hub
= usb_hub_allocate();
549 /* Get the the hub descriptor */
550 ret
= usb_get_hub_descriptor(dev
, buffer
, 4);
552 debug("usb_hub_configure: failed to get hub " \
553 "descriptor, giving up %lX\n", dev
->status
);
556 descriptor
= (struct usb_hub_descriptor
*)buffer
;
558 length
= min_t(int, descriptor
->bLength
,
559 sizeof(struct usb_hub_descriptor
));
561 ret
= usb_get_hub_descriptor(dev
, buffer
, length
);
563 debug("usb_hub_configure: failed to get hub " \
564 "descriptor 2nd giving up %lX\n", dev
->status
);
567 memcpy((unsigned char *)&hub
->desc
, buffer
, length
);
568 /* adjust 16bit values */
569 put_unaligned(le16_to_cpu(get_unaligned(
570 &descriptor
->wHubCharacteristics
)),
571 &hub
->desc
.wHubCharacteristics
);
573 bitmap
= (unsigned char *)&hub
->desc
.DeviceRemovable
[0];
574 /* devices not removable by default */
575 memset(bitmap
, 0xff, (USB_MAXCHILDREN
+1+7)/8);
576 bitmap
= (unsigned char *)&hub
->desc
.PortPowerCtrlMask
[0];
577 memset(bitmap
, 0xff, (USB_MAXCHILDREN
+1+7)/8); /* PowerMask = 1B */
579 for (i
= 0; i
< ((hub
->desc
.bNbrPorts
+ 1 + 7)/8); i
++)
580 hub
->desc
.DeviceRemovable
[i
] = descriptor
->DeviceRemovable
[i
];
582 for (i
= 0; i
< ((hub
->desc
.bNbrPorts
+ 1 + 7)/8); i
++)
583 hub
->desc
.PortPowerCtrlMask
[i
] = descriptor
->PortPowerCtrlMask
[i
];
585 dev
->maxchild
= descriptor
->bNbrPorts
;
586 debug("%d ports detected\n", dev
->maxchild
);
588 hubCharacteristics
= get_unaligned(&hub
->desc
.wHubCharacteristics
);
589 switch (hubCharacteristics
& HUB_CHAR_LPSM
) {
591 debug("ganged power switching\n");
594 debug("individual port power switching\n");
598 debug("unknown reserved power switching mode\n");
602 if (hubCharacteristics
& HUB_CHAR_COMPOUND
)
603 debug("part of a compound device\n");
605 debug("standalone hub\n");
607 switch (hubCharacteristics
& HUB_CHAR_OCPM
) {
609 debug("global over-current protection\n");
612 debug("individual port over-current protection\n");
616 debug("no over-current protection\n");
620 debug("power on to power good time: %dms\n",
621 descriptor
->bPwrOn2PwrGood
* 2);
622 debug("hub controller current requirement: %dmA\n",
623 descriptor
->bHubContrCurrent
);
625 for (i
= 0; i
< dev
->maxchild
; i
++)
626 debug("port %d is%s removable\n", i
+ 1,
627 hub
->desc
.DeviceRemovable
[(i
+ 1) / 8] & \
628 (1 << ((i
+ 1) % 8)) ? " not" : "");
630 if (sizeof(struct usb_hub_status
) > USB_BUFSIZ
) {
631 debug("usb_hub_configure: failed to get Status - " \
632 "too long: %d\n", descriptor
->bLength
);
636 ret
= usb_get_hub_status(dev
, buffer
);
638 debug("usb_hub_configure: failed to get Status %lX\n",
644 hubsts
= (struct usb_hub_status
*)buffer
;
647 debug("get_hub_status returned status %X, change %X\n",
648 le16_to_cpu(hubsts
->wHubStatus
),
649 le16_to_cpu(hubsts
->wHubChange
));
650 debug("local power source is %s\n",
651 (le16_to_cpu(hubsts
->wHubStatus
) & HUB_STATUS_LOCAL_POWER
) ? \
652 "lost (inactive)" : "good");
653 debug("%sover-current condition exists\n",
654 (le16_to_cpu(hubsts
->wHubStatus
) & HUB_STATUS_OVERCURRENT
) ? \
656 usb_hub_power_on(hub
);
659 * Reset any devices that may be in a bad state when applying
660 * the power. This is a __weak function. Resetting of the devices
661 * should occur in the board file of the device.
663 for (i
= 0; i
< dev
->maxchild
; i
++)
664 usb_hub_reset_devices(i
+ 1);
667 * Only add the connected USB devices, including potential hubs,
668 * to a scanning list. This list will get scanned and devices that
669 * are detected (either via port connected or via port timeout)
670 * will get removed from this list. Scanning of the devices on this
671 * list will continue until all devices are removed.
673 for (i
= 0; i
< dev
->maxchild
; i
++) {
674 struct usb_device_scan
*usb_scan
;
676 usb_scan
= calloc(1, sizeof(*usb_scan
));
678 printf("Can't allocate memory for USB device!\n");
684 list_add_tail(&usb_scan
->list
, &usb_scan_list
);
688 * And now call the scanning code which loops over the generated list
690 ret
= usb_device_list_scan();
695 static int usb_hub_check(struct usb_device
*dev
, int ifnum
)
697 struct usb_interface
*iface
;
698 struct usb_endpoint_descriptor
*ep
= NULL
;
700 iface
= &dev
->config
.if_desc
[ifnum
];
702 if (iface
->desc
.bInterfaceClass
!= USB_CLASS_HUB
)
704 /* Some hubs have a subclass of 1, which AFAICT according to the */
705 /* specs is not defined, but it works */
706 if ((iface
->desc
.bInterfaceSubClass
!= 0) &&
707 (iface
->desc
.bInterfaceSubClass
!= 1))
709 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
710 if (iface
->desc
.bNumEndpoints
!= 1)
712 ep
= &iface
->ep_desc
[0];
713 /* Output endpoint? Curiousier and curiousier.. */
714 if (!(ep
->bEndpointAddress
& USB_DIR_IN
))
716 /* If it's not an interrupt endpoint, we'd better punt! */
717 if ((ep
->bmAttributes
& 3) != 3)
720 debug("USB hub found\n");
724 debug("USB hub not found: bInterfaceClass=%d, bInterfaceSubClass=%d, bNumEndpoints=%d\n",
725 iface
->desc
.bInterfaceClass
, iface
->desc
.bInterfaceSubClass
,
726 iface
->desc
.bNumEndpoints
);
728 debug(" bEndpointAddress=%#x, bmAttributes=%d",
729 ep
->bEndpointAddress
, ep
->bmAttributes
);
735 int usb_hub_probe(struct usb_device
*dev
, int ifnum
)
739 ret
= usb_hub_check(dev
, ifnum
);
742 ret
= usb_hub_configure(dev
);
747 int usb_hub_scan(struct udevice
*hub
)
749 struct usb_device
*udev
= dev_get_parent_priv(hub
);
751 return usb_hub_configure(udev
);
754 static int usb_hub_post_probe(struct udevice
*dev
)
756 debug("%s\n", __func__
);
757 return usb_hub_scan(dev
);
760 static const struct udevice_id usb_hub_ids
[] = {
761 { .compatible
= "usb-hub" },
765 U_BOOT_DRIVER(usb_generic_hub
) = {
767 .id
= UCLASS_USB_HUB
,
768 .of_match
= usb_hub_ids
,
769 .flags
= DM_FLAG_ALLOC_PRIV_DMA
,
772 UCLASS_DRIVER(usb_hub
) = {
773 .id
= UCLASS_USB_HUB
,
775 .post_bind
= dm_scan_fdt_dev
,
776 .post_probe
= usb_hub_post_probe
,
777 .child_pre_probe
= usb_child_pre_probe
,
778 .per_child_auto_alloc_size
= sizeof(struct usb_device
),
779 .per_child_platdata_auto_alloc_size
= sizeof(struct usb_dev_platdata
),
782 static const struct usb_device_id hub_id_table
[] = {
784 .match_flags
= USB_DEVICE_ID_MATCH_DEV_CLASS
,
785 .bDeviceClass
= USB_CLASS_HUB
787 { } /* Terminating entry */
790 U_BOOT_USB_DEVICE(usb_generic_hub
, hub_id_table
);