Lines Matching full:hub
3 * USB hub driver.
40 #include "hub.h"
76 /* workqueue to process hub events */
80 /* synchronize hub-port add/remove and peering operations */
108 * hub driver's behavior. On the first initialization attempt, if the
135 static int hub_port_disable(struct usb_hub *hub, int port1, int set_state);
136 static bool hub_port_warm_reset_required(struct usb_hub *hub, int port1,
139 static inline char *portspeed(struct usb_hub *hub, int portstatus) in portspeed() argument
141 if (hub_is_superspeedplus(hub->hdev)) in portspeed()
143 if (hub_is_superspeed(hub->hdev)) in portspeed()
214 struct usb_hub *hub, in usb_set_lpm_mel() argument
224 * and the hub header decode latency. See USB 3.1 section C 2.2.1 in usb_set_lpm_mel()
229 hub->descriptor->u.ss.bHubHdrDecLat * 100; in usb_set_lpm_mel()
233 * each link + wHubDelay for each hub. Add only for last link. in usb_set_lpm_mel()
237 total_mel += (__le16_to_cpu(hub->descriptor->u.ss.wHubDelay) + in usb_set_lpm_mel()
248 if (!hub->hdev->parent) in usb_set_lpm_mel()
261 struct usb_hub *hub, in usb_set_lpm_pel() argument
271 * device and the parent hub into U0. The exit latency is the bigger of in usb_set_lpm_pel()
272 * the device exit latency or the hub exit latency. in usb_set_lpm_pel()
280 * When the hub starts to receive the LFPS, there is a slight delay for in usb_set_lpm_pel()
283 * delay, plus the PEL that we calculated for this hub. in usb_set_lpm_pel()
337 struct usb_hub *hub; in usb_set_lpm_parameters() local
351 hub = usb_hub_to_struct_hub(udev->parent); in usb_set_lpm_parameters()
355 if (!hub) in usb_set_lpm_parameters()
364 hub, &udev->parent->u1_params, hub_u1_del); in usb_set_lpm_parameters()
367 hub, &udev->parent->u2_params, hub_u2_del); in usb_set_lpm_parameters()
371 * when the parent hub notices the downstream port is trying to in usb_set_lpm_parameters()
372 * transition to U0 to when the hub initiates a U0 transition on its in usb_set_lpm_parameters()
376 * The hub chapter, sections 10.4.2.4 and 10.4.2.5 seem to be talking in usb_set_lpm_parameters()
380 * assume the device exit latencies they are talking about are the hub in usb_set_lpm_parameters()
389 hub, &udev->parent->u1_params, hub_u1_del, in usb_set_lpm_parameters()
398 hub, &udev->parent->u2_params, hub_u2_del, in usb_set_lpm_parameters()
489 static void set_port_led(struct usb_hub *hub, int port1, int selector) in set_port_led() argument
491 struct usb_port *port_dev = hub->ports[port1 - 1]; in set_port_led()
494 status = set_port_feature(hub->hdev, (selector << 8) | port1, in set_port_led()
504 struct usb_hub *hub = in led_work() local
506 struct usb_device *hdev = hub->hdev; in led_work()
511 if (hdev->state != USB_STATE_CONFIGURED || hub->quiescing) in led_work()
519 switch (hub->indicator[i]) { in led_work()
558 set_port_led(hub, i + 1, selector); in led_work()
559 hub->indicator[i] = mode; in led_work()
564 set_port_led(hub, cursor + 1, HUB_LED_GREEN); in led_work()
565 hub->indicator[cursor] = INDICATOR_CYCLE; in led_work()
570 &hub->leds, LED_CYCLE_PERIOD); in led_work()
573 /* use a short timeout for hub/port status fetches */
612 static int hub_ext_port_status(struct usb_hub *hub, int port1, int type, in hub_ext_port_status() argument
621 mutex_lock(&hub->status_mutex); in hub_ext_port_status()
622 ret = get_port_status(hub->hdev, port1, &hub->status->port, type, len); in hub_ext_port_status()
625 dev_err(hub->intfdev, in hub_ext_port_status()
630 *status = le16_to_cpu(hub->status->port.wPortStatus); in hub_ext_port_status()
631 *change = le16_to_cpu(hub->status->port.wPortChange); in hub_ext_port_status()
634 hub->status->port.dwExtPortStatus); in hub_ext_port_status()
637 mutex_unlock(&hub->status_mutex); in hub_ext_port_status()
641 * protects hub->status, and the phy driver only checks the port in hub_ext_port_status()
645 struct usb_device *hdev = hub->hdev; in hub_ext_port_status()
669 int usb_hub_port_status(struct usb_hub *hub, int port1, in usb_hub_port_status() argument
672 return hub_ext_port_status(hub, port1, HUB_PORT_STATUS, in usb_hub_port_status()
676 static void hub_resubmit_irq_urb(struct usb_hub *hub) in hub_resubmit_irq_urb() argument
681 spin_lock_irqsave(&hub->irq_urb_lock, flags); in hub_resubmit_irq_urb()
683 if (hub->quiescing) { in hub_resubmit_irq_urb()
684 spin_unlock_irqrestore(&hub->irq_urb_lock, flags); in hub_resubmit_irq_urb()
688 status = usb_submit_urb(hub->urb, GFP_ATOMIC); in hub_resubmit_irq_urb()
691 dev_err(hub->intfdev, "resubmit --> %d\n", status); in hub_resubmit_irq_urb()
692 mod_timer(&hub->irq_urb_retry, jiffies + HZ); in hub_resubmit_irq_urb()
695 spin_unlock_irqrestore(&hub->irq_urb_lock, flags); in hub_resubmit_irq_urb()
700 struct usb_hub *hub = from_timer(hub, t, irq_urb_retry); in hub_retry_irq_urb() local
702 hub_resubmit_irq_urb(hub); in hub_retry_irq_urb()
706 static void kick_hub_wq(struct usb_hub *hub) in kick_hub_wq() argument
710 if (hub->disconnected || work_pending(&hub->events)) in kick_hub_wq()
718 * work for this hub. Therefore put the interface either when in kick_hub_wq()
721 intf = to_usb_interface(hub->intfdev); in kick_hub_wq()
723 hub_get(hub); in kick_hub_wq()
725 if (queue_work(hub_wq, &hub->events)) in kick_hub_wq()
730 hub_put(hub); in kick_hub_wq()
735 struct usb_hub *hub = usb_hub_to_struct_hub(hdev); in usb_kick_hub_wq() local
737 if (hub) in usb_kick_hub_wq()
738 kick_hub_wq(hub); in usb_kick_hub_wq()
747 * resume through the normal hub interrupt URB.
752 struct usb_hub *hub; in usb_wakeup_notification() local
758 hub = usb_hub_to_struct_hub(hdev); in usb_wakeup_notification()
759 if (hub) { in usb_wakeup_notification()
760 port_dev = hub->ports[portnum - 1]; in usb_wakeup_notification()
764 set_bit(portnum, hub->wakeup_bits); in usb_wakeup_notification()
765 kick_hub_wq(hub); in usb_wakeup_notification()
773 struct usb_hub *hub = urb->context; in hub_irq() local
785 /* Cause a hub reset after 10 consecutive errors */ in hub_irq()
786 dev_dbg(hub->intfdev, "transfer --> %d\n", status); in hub_irq()
787 if ((++hub->nerrors < 10) || hub->error) in hub_irq()
789 hub->error = status; in hub_irq()
796 bits |= ((unsigned long) ((*hub->buffer)[i])) in hub_irq()
798 hub->event_bits[0] = bits; in hub_irq()
802 hub->nerrors = 0; in hub_irq()
805 kick_hub_wq(hub); in hub_irq()
808 hub_resubmit_irq_urb(hub); in hub_irq()
833 * both can talk to the same hub concurrently.
837 struct usb_hub *hub = in hub_tt_work() local
841 spin_lock_irqsave(&hub->tt.lock, flags); in hub_tt_work()
842 while (!list_empty(&hub->tt.clear_list)) { in hub_tt_work()
845 struct usb_device *hdev = hub->hdev; in hub_tt_work()
849 next = hub->tt.clear_list.next; in hub_tt_work()
854 spin_unlock_irqrestore(&hub->tt.lock, flags); in hub_tt_work()
867 spin_lock_irqsave(&hub->tt.lock, flags); in hub_tt_work()
869 spin_unlock_irqrestore(&hub->tt.lock, flags); in hub_tt_work()
873 * usb_hub_set_port_power - control hub port's power state
874 * @hdev: USB device belonging to the usb hub
875 * @hub: target hub
884 int usb_hub_set_port_power(struct usb_device *hdev, struct usb_hub *hub, in usb_hub_set_port_power() argument
898 set_bit(port1, hub->power_bits); in usb_hub_set_port_power()
900 clear_bit(port1, hub->power_bits); in usb_hub_set_port_power()
905 * usb_hub_clear_tt_buffer - clear control/bulk TT state in high speed hub
908 * High speed HCDs use this to tell the hub driver that some split control or
913 * It may not be possible for that hub to handle additional full (or low)
928 * there can be many TTs per hub). even if they're uncommon. in usb_hub_clear_tt_buffer()
960 static void hub_power_on(struct usb_hub *hub, bool do_delay) in hub_power_on() argument
968 * unless we send these messages to the hub. in hub_power_on()
970 if (hub_is_port_power_switchable(hub)) in hub_power_on()
971 dev_dbg(hub->intfdev, "enabling power on all ports\n"); in hub_power_on()
973 dev_dbg(hub->intfdev, "trying to enable port power on " in hub_power_on()
974 "non-switchable hub\n"); in hub_power_on()
975 for (port1 = 1; port1 <= hub->hdev->maxchild; port1++) in hub_power_on()
976 if (test_bit(port1, hub->power_bits)) in hub_power_on()
977 set_port_feature(hub->hdev, port1, USB_PORT_FEAT_POWER); in hub_power_on()
979 usb_clear_port_feature(hub->hdev, port1, in hub_power_on()
982 msleep(hub_power_on_good_delay(hub)); in hub_power_on()
985 static int hub_hub_status(struct usb_hub *hub, in hub_hub_status() argument
990 mutex_lock(&hub->status_mutex); in hub_hub_status()
991 ret = get_hub_status(hub->hdev, &hub->status->hub); in hub_hub_status()
994 dev_err(hub->intfdev, in hub_hub_status()
997 *status = le16_to_cpu(hub->status->hub.wHubStatus); in hub_hub_status()
998 *change = le16_to_cpu(hub->status->hub.wHubChange); in hub_hub_status()
1001 mutex_unlock(&hub->status_mutex); in hub_hub_status()
1005 static int hub_set_port_link_state(struct usb_hub *hub, int port1, in hub_set_port_link_state() argument
1008 return set_port_feature(hub->hdev, in hub_set_port_link_state()
1018 static void hub_port_logical_disconnect(struct usb_hub *hub, int port1) in hub_port_logical_disconnect() argument
1020 dev_dbg(&hub->ports[port1 - 1]->dev, "logical disconnect\n"); in hub_port_logical_disconnect()
1021 hub_port_disable(hub, port1, 1); in hub_port_logical_disconnect()
1027 * That's easy if this hub can switch power per-port, and in hub_port_logical_disconnect()
1032 set_bit(port1, hub->change_bits); in hub_port_logical_disconnect()
1033 kick_hub_wq(hub); in hub_port_logical_disconnect()
1037 * usb_remove_device - disable a device's port on its parent hub
1050 struct usb_hub *hub; in usb_remove_device() local
1054 if (!udev->parent) /* Can't remove a root hub */ in usb_remove_device()
1056 hub = usb_hub_to_struct_hub(udev->parent); in usb_remove_device()
1057 intf = to_usb_interface(hub->intfdev); in usb_remove_device()
1063 set_bit(udev->portnum, hub->removed_bits); in usb_remove_device()
1064 hub_port_logical_disconnect(hub, udev->portnum); in usb_remove_device()
1077 static void hub_activate(struct usb_hub *hub, enum hub_activation_type type) in hub_activate() argument
1079 struct usb_device *hdev = hub->hdev; in hub_activate()
1091 /* Was the hub disconnected while we were waiting? */ in hub_activate()
1092 if (hub->disconnected) in hub_activate()
1098 hub_get(hub); in hub_activate()
1100 /* The superspeed hub except for root hub has to use Hub Depth in hub_activate()
1102 * it uses to determine the downstream port number. So hub driver in hub_activate()
1103 * should send a set hub depth request to superspeed hub after in hub_activate()
1104 * the superspeed hub is set configuration in initialization or in hub_activate()
1117 dev_err(hub->intfdev, in hub_activate()
1118 "set hub depth failed\n"); in hub_activate()
1122 * hub's initial power-up delays. This is pretty awkward in hub_activate()
1125 * root hub (assuming usbcore is compiled into the kernel in hub_activate()
1134 delay = hub_power_on_good_delay(hub); in hub_activate()
1136 hub_power_on(hub, false); in hub_activate()
1137 INIT_DELAYED_WORK(&hub->init_work, hub_init_func2); in hub_activate()
1139 &hub->init_work, in hub_activate()
1144 to_usb_interface(hub->intfdev)); in hub_activate()
1147 /* The internal host controller state for the hub device in hub_activate()
1149 * Update the device's info so the HW knows it's a hub. in hub_activate()
1154 &hub->tt, GFP_NOIO); in hub_activate()
1156 dev_err(hub->intfdev, in hub_activate()
1157 "Host not accepting hub info update\n"); in hub_activate()
1158 dev_err(hub->intfdev, in hub_activate()
1159 "LS/FS devices and hubs may not work under this hub\n"); in hub_activate()
1162 hub_power_on(hub, true); in hub_activate()
1164 hub_power_on(hub, true); in hub_activate()
1167 } else if (hub_is_superspeed(hub->hdev)) in hub_activate()
1173 * Check each port and set hub->change_bits to let hub_wq know in hub_activate()
1177 struct usb_port *port_dev = hub->ports[port1 - 1]; in hub_activate()
1182 status = usb_hub_port_status(hub, port1, &portstatus, &portchange); in hub_activate()
1215 hub_port_warm_reset_required(hub, port1, portstatus)) in hub_activate()
1216 set_bit(port1, hub->event_bits); in hub_activate()
1231 usb_clear_port_feature(hub->hdev, port1, in hub_activate()
1236 usb_clear_port_feature(hub->hdev, port1, in hub_activate()
1241 usb_clear_port_feature(hub->hdev, port1, in hub_activate()
1245 hub_is_superspeed(hub->hdev)) { in hub_activate()
1247 usb_clear_port_feature(hub->hdev, port1, in hub_activate()
1255 clear_bit(port1, hub->removed_bits); in hub_activate()
1268 set_bit(port1, hub->change_bits); in hub_activate()
1282 if (portchange || (hub_is_superspeed(hub->hdev) && in hub_activate()
1284 set_bit(port1, hub->event_bits); in hub_activate()
1293 if (test_bit(port1, hub->power_bits)) in hub_activate()
1294 set_bit(port1, hub->change_bits); in hub_activate()
1299 set_bit(port1, hub->change_bits); in hub_activate()
1316 INIT_DELAYED_WORK(&hub->init_work, hub_init_func3); in hub_activate()
1318 &hub->init_work, in hub_activate()
1327 hub->quiescing = 0; in hub_activate()
1329 status = usb_submit_urb(hub->urb, GFP_NOIO); in hub_activate()
1331 dev_err(hub->intfdev, "activate --> %d\n", status); in hub_activate()
1332 if (hub->has_indicators && blinkenlights) in hub_activate()
1334 &hub->leds, LED_CYCLE_PERIOD); in hub_activate()
1337 kick_hub_wq(hub); in hub_activate()
1342 usb_autopm_put_interface_async(to_usb_interface(hub->intfdev)); in hub_activate()
1346 hub_put(hub); in hub_activate()
1352 struct usb_hub *hub = container_of(ws, struct usb_hub, init_work.work); in hub_init_func2() local
1354 hub_activate(hub, HUB_INIT2); in hub_init_func2()
1359 struct usb_hub *hub = container_of(ws, struct usb_hub, init_work.work); in hub_init_func3() local
1361 hub_activate(hub, HUB_INIT3); in hub_init_func3()
1368 static void hub_quiesce(struct usb_hub *hub, enum hub_quiescing_type type) in hub_quiesce() argument
1370 struct usb_device *hdev = hub->hdev; in hub_quiesce()
1375 spin_lock_irqsave(&hub->irq_urb_lock, flags); in hub_quiesce()
1376 hub->quiescing = 1; in hub_quiesce()
1377 spin_unlock_irqrestore(&hub->irq_urb_lock, flags); in hub_quiesce()
1382 if (hub->ports[i]->child) in hub_quiesce()
1383 usb_disconnect(&hub->ports[i]->child); in hub_quiesce()
1388 del_timer_sync(&hub->irq_urb_retry); in hub_quiesce()
1389 usb_kill_urb(hub->urb); in hub_quiesce()
1390 if (hub->has_indicators) in hub_quiesce()
1391 cancel_delayed_work_sync(&hub->leds); in hub_quiesce()
1392 if (hub->tt.hub) in hub_quiesce()
1393 flush_work(&hub->tt.clear_work); in hub_quiesce()
1396 static void hub_pm_barrier_for_all_ports(struct usb_hub *hub) in hub_pm_barrier_for_all_ports() argument
1400 for (i = 0; i < hub->hdev->maxchild; ++i) in hub_pm_barrier_for_all_ports()
1401 pm_runtime_barrier(&hub->ports[i]->dev); in hub_pm_barrier_for_all_ports()
1404 /* caller has locked the hub device */
1407 struct usb_hub *hub = usb_get_intfdata(intf); in hub_pre_reset() local
1409 hub_quiesce(hub, HUB_PRE_RESET); in hub_pre_reset()
1410 hub->in_reset = 1; in hub_pre_reset()
1411 hub_pm_barrier_for_all_ports(hub); in hub_pre_reset()
1415 /* caller has locked the hub device */
1418 struct usb_hub *hub = usb_get_intfdata(intf); in hub_post_reset() local
1420 hub->in_reset = 0; in hub_post_reset()
1421 hub_pm_barrier_for_all_ports(hub); in hub_post_reset()
1422 hub_activate(hub, HUB_POST_RESET); in hub_post_reset()
1426 static int hub_configure(struct usb_hub *hub, in hub_configure() argument
1430 struct usb_device *hdev = hub->hdev; in hub_configure()
1431 struct device *hub_dev = hub->intfdev; in hub_configure()
1441 hub->buffer = kmalloc(sizeof(*hub->buffer), GFP_KERNEL); in hub_configure()
1442 if (!hub->buffer) { in hub_configure()
1447 hub->status = kmalloc(sizeof(*hub->status), GFP_KERNEL); in hub_configure()
1448 if (!hub->status) { in hub_configure()
1452 mutex_init(&hub->status_mutex); in hub_configure()
1454 hub->descriptor = kzalloc(sizeof(*hub->descriptor), GFP_KERNEL); in hub_configure()
1455 if (!hub->descriptor) { in hub_configure()
1460 /* Request the entire hub descriptor. in hub_configure()
1461 * hub->descriptor can handle USB_MAXCHILDREN ports, in hub_configure()
1462 * but a (non-SS) hub can/will return fewer bytes here. in hub_configure()
1464 ret = get_hub_descriptor(hdev, hub->descriptor); in hub_configure()
1466 message = "can't read hub descriptor"; in hub_configure()
1474 if (hub->descriptor->bNbrPorts > maxchild) { in hub_configure()
1475 message = "hub has too many ports!"; in hub_configure()
1478 } else if (hub->descriptor->bNbrPorts == 0) { in hub_configure()
1479 message = "hub doesn't have any ports!"; in hub_configure()
1485 * Accumulate wHubDelay + 40ns for every hub in the tree of devices. in hub_configure()
1489 u32 delay = __le16_to_cpu(hub->descriptor->u.ss.wHubDelay); in hub_configure()
1498 maxchild = hub->descriptor->bNbrPorts; in hub_configure()
1502 hub->ports = kcalloc(maxchild, sizeof(struct usb_port *), GFP_KERNEL); in hub_configure()
1503 if (!hub->ports) { in hub_configure()
1508 wHubCharacteristics = le16_to_cpu(hub->descriptor->wHubCharacteristics); in hub_configure()
1523 portstr[i] = hub->descriptor->u.hs.DeviceRemovable in hub_configure()
1529 dev_dbg(hub_dev, "standalone hub\n"); in hub_configure()
1557 spin_lock_init(&hub->tt.lock); in hub_configure()
1558 INIT_LIST_HEAD(&hub->tt.clear_list); in hub_configure()
1559 INIT_WORK(&hub->tt.clear_work, hub_tt_work); in hub_configure()
1565 hub->tt.hub = hdev; in hub_configure()
1571 hub->tt.multi = 1; in hub_configure()
1575 hub->tt.hub = hdev; in hub_configure()
1581 dev_dbg(hub_dev, "Unrecognized hub protocol %d\n", in hub_configure()
1590 hub->tt.think_time = 666; in hub_configure()
1593 8, hub->tt.think_time); in hub_configure()
1597 hub->tt.think_time = 666 * 2; in hub_configure()
1600 16, hub->tt.think_time); in hub_configure()
1603 hub->tt.think_time = 666 * 3; in hub_configure()
1606 24, hub->tt.think_time); in hub_configure()
1609 hub->tt.think_time = 666 * 4; in hub_configure()
1612 32, hub->tt.think_time); in hub_configure()
1616 /* probe() zeroes hub->indicator[] */ in hub_configure()
1618 hub->has_indicators = 1; in hub_configure()
1623 hub->descriptor->bPwrOn2PwrGood * 2); in hub_configure()
1630 message = "can't get hub status"; in hub_configure()
1640 hub->mA_per_port = full_load; in hub_configure()
1642 hub->mA_per_port = hdev->bus_mA; in hub_configure()
1643 hub->limited_power = 1; in hub_configure()
1647 hub->descriptor->bHubContrCurrent; in hub_configure()
1649 dev_dbg(hub_dev, "hub controller current requirement: %dmA\n", in hub_configure()
1650 hub->descriptor->bHubContrCurrent); in hub_configure()
1651 hub->limited_power = 1; in hub_configure()
1657 hub->mA_per_port = unit_load; /* 7.2.1 */ in hub_configure()
1659 } else { /* Self-powered external hub */ in hub_configure()
1662 hub->mA_per_port = full_load; in hub_configure()
1664 if (hub->mA_per_port < full_load) in hub_configure()
1666 hub->mA_per_port); in hub_configure()
1668 ret = hub_hub_status(hub, &hubstatus, &hubchange); in hub_configure()
1670 message = "can't get hub status"; in hub_configure()
1693 if (maxp > sizeof(*hub->buffer)) in hub_configure()
1694 maxp = sizeof(*hub->buffer); in hub_configure()
1696 hub->urb = usb_alloc_urb(0, GFP_KERNEL); in hub_configure()
1697 if (!hub->urb) { in hub_configure()
1702 usb_fill_int_urb(hub->urb, hdev, pipe, *hub->buffer, maxp, hub_irq, in hub_configure()
1703 hub, endpoint->bInterval); in hub_configure()
1705 /* maybe cycle the hub leds */ in hub_configure()
1706 if (hub->has_indicators && blinkenlights) in hub_configure()
1707 hub->indicator[0] = INDICATOR_CYCLE; in hub_configure()
1711 ret = usb_hub_create_port_device(hub, i + 1); in hub_configure()
1713 dev_err(hub->intfdev, in hub_configure()
1720 struct usb_port *port_dev = hub->ports[i]; in hub_configure()
1729 /* Update the HCD's internal representation of this hub before hub_wq in hub_configure()
1730 * starts getting port status changes for devices under the hub. in hub_configure()
1734 &hub->tt, GFP_KERNEL); in hub_configure()
1736 message = "can't update HCD hub info"; in hub_configure()
1741 usb_hub_adjust_deviceremovable(hdev, hub->descriptor); in hub_configure()
1743 hub_activate(hub, HUB_INIT); in hub_configure()
1755 struct usb_hub *hub = container_of(kref, struct usb_hub, kref); in hub_release() local
1757 usb_put_dev(hub->hdev); in hub_release()
1758 usb_put_intf(to_usb_interface(hub->intfdev)); in hub_release()
1759 kfree(hub); in hub_release()
1762 void hub_get(struct usb_hub *hub) in hub_get() argument
1764 kref_get(&hub->kref); in hub_get()
1767 void hub_put(struct usb_hub *hub) in hub_put() argument
1769 kref_put(&hub->kref, hub_release); in hub_put()
1776 struct usb_hub *hub = usb_get_intfdata(intf); in hub_disconnect() local
1781 * Stop adding new hub events. We do not want to block here and thus in hub_disconnect()
1784 hub->disconnected = 1; in hub_disconnect()
1786 /* Disconnect all children and quiesce the hub */ in hub_disconnect()
1787 hub->error = 0; in hub_disconnect()
1788 hub_quiesce(hub, HUB_DISCONNECT); in hub_disconnect()
1800 usb_hub_remove_port_device(hub, port1); in hub_disconnect()
1804 if (hub->hdev->speed == USB_SPEED_HIGH) in hub_disconnect()
1807 usb_free_urb(hub->urb); in hub_disconnect()
1808 kfree(hub->ports); in hub_disconnect()
1809 kfree(hub->descriptor); in hub_disconnect()
1810 kfree(hub->status); in hub_disconnect()
1811 kfree(hub->buffer); in hub_disconnect()
1815 if (hub->quirk_disable_autosuspend) in hub_disconnect()
1818 onboard_dev_destroy_pdevs(&hub->onboard_devs); in hub_disconnect()
1820 hub_put(hub); in hub_disconnect()
1831 /* Multiple endpoints? What kind of mutant ninja-hub is this? */ in hub_descriptor_is_sane()
1846 struct usb_hub *hub; in hub_probe() local
1858 dev_err(&intf->dev, "Invalid hub with more than one config or interface\n"); in hub_probe()
1866 * - Unlike other drivers, the hub driver does not rely on the in hub_probe()
1869 * change on hub downstream ports, so it is safe to do it. in hub_probe()
1872 * below very rare devices when they are plugged into hub in hub_probe()
1883 * autosuspend delay of their parent hub in the probe() to one in hub_probe()
1888 * hub during running 'lsusb', but it is probably too in hub_probe()
1891 * - Change autosuspend delay of hub can avoid unnecessary auto in hub_probe()
1892 * suspend timer for hub, also may decrease power consumption in hub_probe()
1910 } else { /* root hub */ in hub_probe()
1919 "Unsupported bus topology: hub nested too deep\n"); in hub_probe()
1925 dev_warn(&intf->dev, "ignoring external hub\n"); in hub_probe()
1931 dev_err(&intf->dev, "bad descriptor, ignoring hub\n"); in hub_probe()
1935 /* We found a hub */ in hub_probe()
1936 dev_info(&intf->dev, "USB hub found\n"); in hub_probe()
1938 hub = kzalloc(sizeof(*hub), GFP_KERNEL); in hub_probe()
1939 if (!hub) in hub_probe()
1942 kref_init(&hub->kref); in hub_probe()
1943 hub->intfdev = &intf->dev; in hub_probe()
1944 hub->hdev = hdev; in hub_probe()
1945 INIT_DELAYED_WORK(&hub->leds, led_work); in hub_probe()
1946 INIT_DELAYED_WORK(&hub->init_work, NULL); in hub_probe()
1947 INIT_WORK(&hub->events, hub_event); in hub_probe()
1948 INIT_LIST_HEAD(&hub->onboard_devs); in hub_probe()
1949 spin_lock_init(&hub->irq_urb_lock); in hub_probe()
1950 timer_setup(&hub->irq_urb_retry, hub_retry_irq_urb, 0); in hub_probe()
1954 usb_set_intfdata(intf, hub); in hub_probe()
1962 hub->quirk_check_port_auto_suspend = 1; in hub_probe()
1965 hub->quirk_disable_autosuspend = 1; in hub_probe()
1977 if (hub_configure(hub, &desc->endpoint[0].desc) >= 0) { in hub_probe()
1978 onboard_dev_create_pdevs(hdev, &hub->onboard_devs); in hub_probe()
1991 struct usb_hub *hub = usb_hub_to_struct_hub(hdev); in hub_ioctl() local
1993 /* assert ifno == 0 (part of hub spec) */ in hub_ioctl()
2005 if (hub->ports[i]->child == NULL) in hub_ioctl()
2009 hub->ports[i]->child->devnum; in hub_ioctl()
2023 * Allow user programs to claim ports on a hub. When a device is attached
2029 struct usb_hub *hub = usb_hub_to_struct_hub(hdev); in find_port_owner() local
2036 /* Devices not managed by the hub driver in find_port_owner()
2039 *ppowner = &(hub->ports[port1 - 1]->port_owner); in find_port_owner()
2078 struct usb_hub *hub = usb_hub_to_struct_hub(hdev); in usb_hub_release_all_ports() local
2082 if (hub->ports[n]->port_owner == owner) in usb_hub_release_all_ports()
2083 hub->ports[n]->port_owner = NULL; in usb_hub_release_all_ports()
2091 struct usb_hub *hub; in usb_device_is_owned() local
2095 hub = usb_hub_to_struct_hub(udev->parent); in usb_device_is_owned()
2096 return !!hub->ports[udev->portnum - 1]->port_owner; in usb_device_is_owned()
2101 struct usb_hub *hub; in update_port_device_state() local
2105 hub = usb_hub_to_struct_hub(udev->parent); in update_port_device_state()
2109 * has a test step to unbind the hub before running the in update_port_device_state()
2111 * which will set the hub's maxchild to 0, further in update_port_device_state()
2114 if (hub) { in update_port_device_state()
2115 port_dev = hub->ports[udev->portnum - 1]; in update_port_device_state()
2124 struct usb_hub *hub = usb_hub_to_struct_hub(udev); in recursively_mark_NOTATTACHED() local
2128 if (hub->ports[i]->child) in recursively_mark_NOTATTACHED()
2129 recursively_mark_NOTATTACHED(hub->ports[i]->child); in recursively_mark_NOTATTACHED()
2169 /* root hub wakeup capabilities are managed out-of-band in usb_set_device_state()
2218 /* be safe when more hub events are proceed in parallel */ in choose_devnum()
2259 struct usb_hub *hub = usb_hub_to_struct_hub(udev); in hub_disconnect_children() local
2264 if (hub->ports[i]->child) in hub_disconnect_children()
2265 usb_disconnect(&hub->ports[i]->child); in hub_disconnect_children()
2277 * If *pdev is a normal device then the parent hub must already be locked.
2278 * If *pdev is a root hub then the caller must hold the usb_bus_idr_lock,
2281 * Only hub drivers (including virtual root hub drivers for host
2290 struct usb_hub *hub = NULL; in usb_disconnect() local
2321 hub = usb_hub_to_struct_hub(udev->parent); in usb_disconnect()
2322 port_dev = hub->ports[port1 - 1]; in usb_disconnect()
2331 if (!test_and_set_bit(port1, hub->child_usage_bits)) in usb_disconnect()
2356 if (port_dev && test_and_clear_bit(port1, hub->child_usage_bits)) in usb_disconnect()
2536 struct usb_hub *hub; in set_usb_port_removable() local
2546 hub = usb_hub_to_struct_hub(udev->parent); in set_usb_port_removable()
2552 switch (hub->ports[udev->portnum - 1]->connect_type) { in set_usb_port_removable()
2565 * Otherwise, check whether the hub knows whether a port is removable in set_usb_port_removable()
2568 wHubCharacteristics = le16_to_cpu(hub->descriptor->wHubCharacteristics); in set_usb_port_removable()
2574 if (le16_to_cpu(hub->descriptor->u.ss.DeviceRemovable) in set_usb_port_removable()
2578 if (hub->descriptor->u.hs.DeviceRemovable[port / 8] & (1 << (port % 8))) in set_usb_port_removable()
2596 * the parent hub (if udev is a normal device) or else the
2597 * usb_bus_idr_lock (if udev is a root hub). The parent's pointer to
2603 * Only the hub driver or root-hub registrar should ever call this.
2615 /* Initialize non-root-hub device wakeup to disabled; in usb_new_device()
2656 /* check whether the hub or firmware marks this port as non-removable */ in usb_new_device()
2671 struct usb_hub *hub = usb_hub_to_struct_hub(udev->parent); in usb_new_device() local
2673 struct usb_port *port_dev = hub->ports[port1 - 1]; in usb_new_device()
2687 if (!test_and_set_bit(port1, hub->child_usage_bits)) in usb_new_device()
2775 * @hdev: The hub device
2905 static bool hub_port_warm_reset_required(struct usb_hub *hub, int port1, in hub_port_warm_reset_required() argument
2910 if (!hub_is_superspeed(hub->hdev)) in hub_port_warm_reset_required()
2913 if (test_bit(port1, hub->warm_reset_bits)) in hub_port_warm_reset_required()
2921 static int hub_port_wait_reset(struct usb_hub *hub, int port1, in hub_port_wait_reset() argument
2936 if (hub_is_superspeedplus(hub->hdev)) in hub_port_wait_reset()
2937 ret = hub_ext_port_status(hub, port1, in hub_port_wait_reset()
2942 ret = usb_hub_port_status(hub, port1, &portstatus, in hub_port_wait_reset()
2962 dev_dbg(&hub->ports[port1 - 1]->dev, in hub_port_wait_reset()
2970 if (hub_port_warm_reset_required(hub, port1, portstatus)) in hub_port_wait_reset()
2981 if (!hub_is_superspeed(hub->hdev) && in hub_port_wait_reset()
2983 usb_clear_port_feature(hub->hdev, port1, in hub_port_wait_reset()
2994 if (hub_is_superspeedplus(hub->hdev)) { in hub_port_wait_reset()
2998 udev->ssp_rate = get_port_ssp_rate(hub->hdev, ext_portstatus); in hub_port_wait_reset()
3006 else if (hub_is_superspeed(hub->hdev)) in hub_port_wait_reset()
3018 static int hub_port_reset(struct usb_hub *hub, int port1, in hub_port_reset() argument
3023 struct usb_port *port_dev = hub->ports[port1 - 1]; in hub_port_reset()
3026 if (!hub_is_superspeed(hub->hdev)) { in hub_port_reset()
3028 dev_err(hub->intfdev, "only USB3 hub support " in hub_port_reset()
3041 if (usb_hub_port_status(hub, port1, &portstatus, in hub_port_reset()
3043 if (hub_port_warm_reset_required(hub, port1, in hub_port_reset()
3047 clear_bit(port1, hub->warm_reset_bits); in hub_port_reset()
3051 status = set_port_feature(hub->hdev, port1, (warm ? in hub_port_reset()
3055 ; /* The hub is gone */ in hub_port_reset()
3061 status = hub_port_wait_reset(hub, port1, udev, delay, in hub_port_reset()
3064 dev_dbg(hub->intfdev, in hub_port_reset()
3075 usb_clear_port_feature(hub->hdev, port1, in hub_port_reset()
3078 if (!hub_is_superspeed(hub->hdev)) in hub_port_reset()
3081 usb_clear_port_feature(hub->hdev, port1, in hub_port_reset()
3083 usb_clear_port_feature(hub->hdev, port1, in hub_port_reset()
3087 usb_clear_port_feature(hub->hdev, port1, in hub_port_reset()
3094 if (usb_hub_port_status(hub, port1, in hub_port_reset()
3098 if (!hub_port_warm_reset_required(hub, port1, in hub_port_reset()
3129 /* Hub needs extra delay after resetting its port. */ in hub_port_reset()
3130 if (hub->hdev->quirks & USB_QUIRK_HUB_SLOW_RESET) in hub_port_reset()
3153 if (!hub_is_superspeed(hub->hdev)) in hub_port_reset()
3161 * @hub: target hub
3177 static bool hub_port_stop_enumerate(struct usb_hub *hub, int port1, int retries) in hub_port_stop_enumerate() argument
3179 struct usb_port *port_dev = hub->ports[port1 - 1]; in hub_port_stop_enumerate()
3202 int usb_port_is_power_on(struct usb_hub *hub, unsigned int portstatus) in usb_port_is_power_on() argument
3206 if (hub_is_superspeed(hub->hdev)) { in usb_port_is_power_on()
3234 static int port_is_suspended(struct usb_hub *hub, unsigned portstatus) in port_is_suspended() argument
3238 if (hub_is_superspeed(hub->hdev)) { in port_is_suspended()
3254 struct usb_hub *hub, int port1, in check_port_resume_type() argument
3257 struct usb_port *port_dev = hub->ports[port1 - 1]; in check_port_resume_type()
3263 && hub_port_warm_reset_required(hub, port1, portstatus)) { in check_port_resume_type()
3267 else if (status || port_is_suspended(hub, portstatus) || in check_port_resume_type()
3268 !usb_port_is_power_on(hub, portstatus)) { in check_port_resume_type()
3274 status = usb_hub_port_status(hub, port1, &portstatus, in check_port_resume_type()
3298 usb_clear_port_feature(hub->hdev, port1, in check_port_resume_type()
3301 usb_clear_port_feature(hub->hdev, port1, in check_port_resume_type()
3306 * turned on the port1 bit in hub->change_bits. But after in check_port_resume_type()
3311 clear_bit(port1, hub->change_bits); in check_port_resume_type()
3414 struct usb_hub *hub = usb_hub_to_struct_hub(udev); in usb_wakeup_enabled_descendants() local
3417 (hub ? hub->wakeup_enabled_descendants : 0); in usb_wakeup_enabled_descendants()
3423 * @udev: device that's no longer in active use, not a root hub
3448 * Devices on USB hub ports have only one "suspend" state, corresponding
3457 * Other than re-initializing the hub (plug/unplug, except for root hubs),
3463 * hub is suspended). Nevertheless, we change @udev->state to
3471 struct usb_hub *hub = usb_hub_to_struct_hub(udev->parent); in usb_port_suspend() local
3472 struct usb_port *port_dev = hub->ports[udev->portnum - 1]; in usb_port_suspend()
3480 * wake up the upstream hub (including maybe the root hub). in usb_port_suspend()
3507 if (hub_is_superspeed(hub->hdev)) in usb_port_suspend()
3508 status = hub_set_port_link_state(hub, port1, USB_SS_PORT_LS_U3); in usb_port_suspend()
3513 * into suspend a few ms after the root hub stops sending packets. in usb_port_suspend()
3522 status = set_port_feature(hub->hdev, port1, in usb_port_suspend()
3537 ret = usb_hub_port_status(hub, port1, &portstatus, in usb_port_suspend()
3543 if (ret == 0 && port_is_suspended(hub, portstatus)) { in usb_port_suspend()
3579 && test_and_clear_bit(port1, hub->child_usage_bits)) in usb_port_suspend()
3582 usb_mark_last_busy(hub->hdev); in usb_port_suspend()
3707 struct usb_hub *hub, int port1, in wait_for_connected() argument
3715 if (!usb_port_is_power_on(hub, *portstatus)) { in wait_for_connected()
3721 status = usb_hub_port_status(hub, port1, portstatus, portchange); in wait_for_connected()
3729 * @udev: device to re-activate, not a root hub
3763 struct usb_hub *hub = usb_hub_to_struct_hub(udev->parent); in usb_port_resume() local
3764 struct usb_port *port_dev = hub->ports[udev->portnum - 1]; in usb_port_resume()
3769 if (!test_and_set_bit(port1, hub->child_usage_bits)) { in usb_port_resume()
3781 status = usb_hub_port_status(hub, port1, &portstatus, &portchange); in usb_port_resume()
3782 if (status == 0 && !port_is_suspended(hub, portstatus)) { in usb_port_resume()
3789 if (hub_is_superspeed(hub->hdev)) in usb_port_resume()
3790 status = hub_set_port_link_state(hub, port1, USB_SS_PORT_LS_U0); in usb_port_resume()
3792 status = usb_clear_port_feature(hub->hdev, in usb_port_resume()
3806 status = usb_hub_port_status(hub, port1, &portstatus, &portchange); in usb_port_resume()
3812 if (hub_is_superspeed(hub->hdev)) { in usb_port_resume()
3814 usb_clear_port_feature(hub->hdev, port1, in usb_port_resume()
3818 usb_clear_port_feature(hub->hdev, port1, in usb_port_resume()
3827 status = wait_for_connected(udev, hub, port1, &portchange, in usb_port_resume()
3831 hub, port1, status, portchange, portstatus); in usb_port_resume()
3836 hub_port_logical_disconnect(hub, port1); in usb_port_resume()
3868 static int hub_handle_remote_wakeup(struct usb_hub *hub, unsigned int port, in hub_handle_remote_wakeup() argument
3872 struct usb_port *port_dev = hub->ports[port - 1]; in hub_handle_remote_wakeup()
3879 hdev = hub->hdev; in hub_handle_remote_wakeup()
3905 hub_port_disable(hub, port, 1); in hub_handle_remote_wakeup()
3911 static int check_ports_changed(struct usb_hub *hub) in check_ports_changed() argument
3915 for (port1 = 1; port1 <= hub->hdev->maxchild; ++port1) { in check_ports_changed()
3919 status = usb_hub_port_status(hub, port1, &portstatus, &portchange); in check_ports_changed()
3928 struct usb_hub *hub = usb_get_intfdata(intf); in hub_suspend() local
3929 struct usb_device *hdev = hub->hdev; in hub_suspend()
3936 hub->wakeup_enabled_descendants = 0; in hub_suspend()
3938 struct usb_port *port_dev = hub->ports[port1 - 1]; in hub_suspend()
3948 hub->wakeup_enabled_descendants += in hub_suspend()
3952 if (hdev->do_remote_wakeup && hub->quirk_check_port_auto_suspend) { in hub_suspend()
3953 /* check if there are changes pending on hub ports */ in hub_suspend()
3954 if (check_ports_changed(hub)) { in hub_suspend()
3962 /* Enable hub to send remote wakeup for all ports. */ in hub_suspend()
3976 hub_quiesce(hub, HUB_SUSPEND); in hub_suspend()
3980 /* Report wakeup requests from the ports of a resuming root hub */
3981 static void report_wakeup_requests(struct usb_hub *hub) in report_wakeup_requests() argument
3983 struct usb_device *hdev = hub->hdev; in report_wakeup_requests()
3990 return; /* Not a root hub */ in report_wakeup_requests()
4006 udev = hub->ports[i]->child; in report_wakeup_requests()
4016 struct usb_hub *hub = usb_get_intfdata(intf); in hub_resume() local
4019 hub_activate(hub, HUB_RESUME); in hub_resume()
4027 report_wakeup_requests(hub); in hub_resume()
4033 struct usb_hub *hub = usb_get_intfdata(intf); in hub_reset_resume() local
4036 hub_activate(hub, HUB_RESET_RESUME); in hub_reset_resume()
4041 * usb_root_hub_lost_power - called by HCD if the root hub lost Vbus power
4042 * @rhdev: struct usb_device for the root hub
4044 * The USB host controller driver calls this function when its root hub
4047 * When the hub driver is resumed it will take notice and carry out
4053 dev_notice(&rhdev->dev, "root hub lost power or was reset\n"); in usb_root_hub_lost_power()
4281 * Enable the hub-initiated U1/U2 idle timeouts, and enable device-initiated
4285 * control transfers to set the hub timeout or enable device-initiated U1/U2
4289 * hub-initiated U1/U2 will be disabled.
4291 * If we cannot set the parent hub U1/U2 timeout, we attempt to let the xHCI
4336 /* If we can't set the parent hub U1/U2 timeout, in usb_enable_link_state()
4366 * Disable the hub-initiated U1/U2 idle timeouts, and disable device-initiated
4369 * If this function returns -EBUSY, the parent hub will still allow U1/U2 entry.
4373 * it won't have an effect on the bus link state because the parent hub will
4403 /* As soon as usb_set_lpm_timeout(0) return 0, hub initiated LPM in usb_disable_link_state()
4404 * is disabled. Hub will disallows link to enter U1/U2 as well, in usb_disable_link_state()
4405 * even device is initiating LPM. Hence LPM is disabled if hub LPM in usb_disable_link_state()
4418 * Disable hub-initiated and device-initiated U1 and U2 entry.
4474 * Attempt to enable device-initiated and hub-initiated U1 and U2 entry. The
4484 struct usb_hub *hub; in usb_enable_lpm() local
4505 hub = usb_hub_to_struct_hub(udev->parent); in usb_enable_lpm()
4506 if (!hub) in usb_enable_lpm()
4509 port_dev = hub->ports[udev->portnum - 1]; in usb_enable_lpm()
4534 static void hub_usb3_port_prepare_disable(struct usb_hub *hub, in hub_usb3_port_prepare_disable() argument
4541 ret = hub_set_port_link_state(hub, port_dev->portnum, in hub_usb3_port_prepare_disable()
4560 static inline void hub_usb3_port_prepare_disable(struct usb_hub *hub, in hub_usb3_port_prepare_disable() argument
4590 static int hub_handle_remote_wakeup(struct usb_hub *hub, unsigned int port, in hub_handle_remote_wakeup() argument
4608 static int hub_port_disable(struct usb_hub *hub, int port1, int set_state) in hub_port_disable() argument
4610 struct usb_port *port_dev = hub->ports[port1 - 1]; in hub_port_disable()
4611 struct usb_device *hdev = hub->hdev; in hub_port_disable()
4614 if (!hub->error) { in hub_port_disable()
4615 if (hub_is_superspeed(hub->hdev)) { in hub_port_disable()
4616 hub_usb3_port_prepare_disable(hub, port_dev); in hub_port_disable()
4617 ret = hub_set_port_link_state(hub, port_dev->portnum, in hub_port_disable()
4640 struct usb_hub *hub = usb_hub_to_struct_hub(udev->parent); in usb_port_disable() local
4642 return hub_port_disable(hub, udev->portnum, 0); in usb_port_disable()
4660 int hub_port_debounce(struct usb_hub *hub, int port1, bool must_be_connected) in hub_port_debounce() argument
4666 struct usb_port *port_dev = hub->ports[port1 - 1]; in hub_port_debounce()
4669 ret = usb_hub_port_status(hub, port1, &portstatus, &portchange); in hub_port_debounce()
4686 usb_clear_port_feature(hub->hdev, port1, in hub_port_debounce()
4718 struct usb_hub *hub = usb_hub_to_struct_hub(udev->parent); in hub_set_address() local
4720 if (hub->hdev->quirks & USB_QUIRK_SHORT_SET_ADDRESS_REQ_TIMEOUT) in hub_set_address()
4759 struct usb_hub *hub = usb_hub_to_struct_hub(udev->parent); in hub_set_initial_usb2_lpm_policy() local
4765 if (hub) in hub_set_initial_usb2_lpm_policy()
4766 connect_type = hub->ports[udev->portnum - 1]->connect_type; in hub_set_initial_usb2_lpm_policy()
4868 hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1, in hub_port_init() argument
4871 struct usb_device *hdev = hub->hdev; in hub_port_init()
4873 struct usb_port *port_dev = hub->ports[port1 - 1]; in hub_port_init()
4889 /* root hub ports have a slightly longer reset period in hub_port_init()
4905 retval = hub_port_reset(hub, port1, udev, delay, false); in hub_port_init()
4974 if (!hub->tt.hub) { in hub_port_init()
4975 dev_err(&udev->dev, "parent hub has no TT\n"); in hub_port_init()
4979 udev->tt = &hub->tt; in hub_port_init()
4999 if (hub_port_stop_enumerate(hub, port1, retries)) { in hub_port_init()
5008 "hub failed to enable device, error %d\n", in hub_port_init()
5022 retval = hub_port_reset(hub, port1, udev, delay, false); in hub_port_init()
5158 * and attached to a superspeed hub port, but the device descriptor in hub_port_init()
5165 hub_port_reset(hub, port1, udev, HUB_BH_RESET_TIME, true); in hub_port_init()
5189 hub_port_disable(hub, port1, 0); in hub_port_init()
5197 check_highspeed(struct usb_hub *hub, struct usb_device *udev, int port1) in check_highspeed() argument
5213 "connect to a high speed hub\n"); in check_highspeed()
5214 /* hub LEDs are probably harder to miss than syslog */ in check_highspeed()
5215 if (hub->has_indicators) { in check_highspeed()
5216 hub->indicator[port1-1] = INDICATOR_GREEN_BLINK; in check_highspeed()
5218 &hub->leds, 0); in check_highspeed()
5225 hub_power_remaining(struct usb_hub *hub) in hub_power_remaining() argument
5227 struct usb_device *hdev = hub->hdev; in hub_power_remaining()
5231 if (!hub->limited_power) in hub_power_remaining()
5234 remaining = hdev->bus_mA - hub->descriptor->bHubContrCurrent; in hub_power_remaining()
5236 struct usb_port *port_dev = hub->ports[port1 - 1]; in hub_power_remaining()
5258 if (delta > hub->mA_per_port) in hub_power_remaining()
5260 delta, hub->mA_per_port); in hub_power_remaining()
5264 dev_warn(hub->intfdev, "%dmA over power budget!\n", in hub_power_remaining()
5356 static void hub_port_connect(struct usb_hub *hub, int port1, u16 portstatus, in hub_port_connect() argument
5362 struct usb_device *hdev = hub->hdev; in hub_port_connect()
5364 struct usb_port *port_dev = hub->ports[port1 - 1]; in hub_port_connect()
5381 clear_bit(port1, hub->removed_bits); in hub_port_connect()
5385 status = hub_port_debounce_be_stable(hub, port1); in hub_port_connect()
5402 test_bit(port1, hub->removed_bits)) { in hub_port_connect()
5405 * maybe switch power back on (e.g. root hub was reset) in hub_port_connect()
5408 if (hub_is_port_power_switchable(hub) in hub_port_connect()
5409 && !usb_port_is_power_on(hub, portstatus) in hub_port_connect()
5417 if (hub_is_superspeed(hub->hdev)) in hub_port_connect()
5425 if (hub_port_stop_enumerate(hub, port1, i)) { in hub_port_connect()
5446 udev->bus_mA = hub->mA_per_port; in hub_port_connect()
5450 if (hub_is_superspeed(hub->hdev)) in hub_port_connect()
5462 status = hub_port_init(hub, udev, port1, i, NULL); in hub_port_connect()
5491 "can't connect bus-powered hub " in hub_port_connect()
5493 if (hub->has_indicators) { in hub_port_connect()
5494 hub->indicator[port1-1] = in hub_port_connect()
5498 &hub->leds, 0); in hub_port_connect()
5509 check_highspeed(hub, udev, port1); in hub_port_connect()
5519 /* We mustn't add new devices if the parent hub has in hub_port_connect()
5550 status = hub_power_remaining(hub); in hub_port_connect()
5552 dev_dbg(hub->intfdev, "%dmA power budget left\n", status); in hub_port_connect()
5557 hub_port_disable(hub, port1, 1); in hub_port_connect()
5573 usb_hub_set_port_power(hdev, hub, port1, false); in hub_port_connect()
5574 msleep(2 * hub_power_on_good_delay(hub)); in hub_port_connect()
5575 usb_hub_set_port_power(hdev, hub, port1, true); in hub_port_connect()
5576 msleep(hub_power_on_good_delay(hub)); in hub_port_connect()
5579 if (hub->hdev->parent || in hub_port_connect()
5588 hub_port_disable(hub, port1, 1); in hub_port_connect()
5589 if (hcd->driver->relinquish_port && !hub->hdev->parent) { in hub_port_connect()
5601 * caller already locked the hub
5603 static void hub_port_connect_change(struct usb_hub *hub, int port1, in hub_port_connect_change() argument
5607 struct usb_port *port_dev = hub->ports[port1 - 1]; in hub_port_connect_change()
5613 portchange, portspeed(hub, portstatus)); in hub_port_connect_change()
5615 if (hub->has_indicators) { in hub_port_connect_change()
5616 set_port_led(hub, port1, HUB_LED_AUTO); in hub_port_connect_change()
5617 hub->indicator[port1-1] = INDICATOR_AUTO; in hub_port_connect_change()
5622 if (hub->hdev->bus->is_b_host) in hub_port_connect_change()
5666 clear_bit(port1, hub->change_bits); in hub_port_connect_change()
5673 hub_port_connect(hub, port1, portstatus, portchange); in hub_port_connect_change()
5677 /* Handle notifying userspace about hub over-current events */
5712 static void port_event(struct usb_hub *hub, int port1) in port_event() argument
5716 struct usb_port *port_dev = hub->ports[port1 - 1]; in port_event()
5718 struct usb_device *hdev = hub->hdev; in port_event()
5722 connect_change = test_bit(port1, hub->change_bits); in port_event()
5723 clear_bit(port1, hub->event_bits); in port_event()
5724 clear_bit(port1, hub->wakeup_bits); in port_event()
5726 if (usb_hub_port_status(hub, port1, &portstatus, &portchange) < 0) in port_event()
5742 * to be shutdown by the hub, this hack enables them again. in port_event()
5747 dev_err(&port_dev->dev, "disabled by hub (EMI?), re-enabling...\n"); in port_event()
5762 hub_power_on(hub, true); in port_event()
5763 usb_hub_port_status(hub, port1, &status, &unused); in port_event()
5797 if (hub_handle_remote_wakeup(hub, port1, portstatus, portchange)) in port_event()
5806 while (hub_port_warm_reset_required(hub, port1, portstatus)) { in port_event()
5811 usb_hub_port_status(hub, port1, &portstatus, &unused); in port_event()
5817 if (hub_port_reset(hub, port1, NULL, in port_event()
5819 hub_port_disable(hub, port1, 1); in port_event()
5833 hub_port_connect_change(hub, port1, portstatus, portchange); in port_event()
5840 struct usb_hub *hub; in hub_event() local
5846 hub = container_of(work, struct usb_hub, events); in hub_event()
5847 hdev = hub->hdev; in hub_event()
5848 hub_dev = hub->intfdev; in hub_event()
5856 (u16) hub->change_bits[0], in hub_event()
5857 (u16) hub->event_bits[0]); in hub_event()
5862 if (unlikely(hub->disconnected)) in hub_event()
5865 /* If the hub has died, clean up after it */ in hub_event()
5867 hub->error = -ENODEV; in hub_event()
5868 hub_quiesce(hub, HUB_DISCONNECT); in hub_event()
5879 /* If this is an inactive hub, do nothing */ in hub_event()
5880 if (hub->quiescing) in hub_event()
5883 if (hub->error) { in hub_event()
5884 dev_dbg(hub_dev, "resetting for error %d\n", hub->error); in hub_event()
5888 dev_dbg(hub_dev, "error resetting hub: %d\n", ret); in hub_event()
5892 hub->nerrors = 0; in hub_event()
5893 hub->error = 0; in hub_event()
5898 struct usb_port *port_dev = hub->ports[i - 1]; in hub_event()
5900 if (test_bit(i, hub->event_bits) in hub_event()
5901 || test_bit(i, hub->change_bits) in hub_event()
5902 || test_bit(i, hub->wakeup_bits)) { in hub_event()
5915 port_event(hub, i); in hub_event()
5921 /* deal with hub status changes */ in hub_event()
5922 if (test_and_clear_bit(0, hub->event_bits) == 0) in hub_event()
5924 else if (hub_hub_status(hub, &hubstatus, &hubchange) < 0) in hub_event()
5932 hub->limited_power = 1; in hub_event()
5934 hub->limited_power = 0; in hub_event()
5943 hub_power_on(hub, true); in hub_event()
5944 hub_hub_status(hub, &status, &unused); in hub_event()
5958 hub_put(hub); in hub_event()
6016 .name = "hub",
6032 printk(KERN_ERR "%s: can't register hub driver\n", in usb_hub_init()
6049 pr_err("%s: can't allocate workqueue for usb hub\n", usbcore_name); in usb_hub_init()
6059 * Hub resources are freed for us by usb_deregister. It calls in usb_hub_cleanup()
6063 * individual hub resources. -greg in usb_hub_cleanup()
6077 * usb device in tree toward the root hub. This function is used only during
6085 struct usb_hub *hub = usb_hub_to_struct_hub(udev); in hub_hc_release_resources() local
6091 if (hub->ports[i]->child) in hub_hc_release_resources()
6092 hub_hc_release_resources(hub->ports[i]->child); in hub_hc_release_resources()
6306 struct usb_hub *hub = usb_hub_to_struct_hub(udev->parent); in usb_reset_device() local
6316 dev_dbg(&udev->dev, "%s for root hub!\n", __func__); in usb_reset_device()
6324 port_dev = hub->ports[udev->portnum - 1]; in usb_reset_device()
6432 * @hdev: USB device belonging to the usb hub
6436 * USB drivers call this function to get hub's child device
6445 struct usb_hub *hub = usb_hub_to_struct_hub(hdev); in usb_hub_find_child() local
6449 return hub->ports[port1 - 1]->child; in usb_hub_find_child()
6456 struct usb_hub *hub = usb_hub_to_struct_hub(hdev); in usb_hub_adjust_deviceremovable() local
6460 if (!hub) in usb_hub_adjust_deviceremovable()
6465 struct usb_port *port_dev = hub->ports[i - 1]; in usb_hub_adjust_deviceremovable()
6481 struct usb_port *port_dev = hub->ports[i - 1]; in usb_hub_adjust_deviceremovable()
6501 * @hdev: USB device belonging to the usb hub
6510 struct usb_hub *hub = usb_hub_to_struct_hub(hdev); in usb_get_hub_port_acpi_handle() local
6512 if (!hub) in usb_get_hub_port_acpi_handle()
6515 return ACPI_HANDLE(&hub->ports[port1 - 1]->dev); in usb_get_hub_port_acpi_handle()