#define USB_VENDOR_GENESYS_LOGIC 0x05e3
#define HUB_QUIRK_CHECK_PORT_AUTOSUSPEND 0x01
-static inline int hub_is_superspeed(struct usb_device *hdev)
-{
- return (hdev->descriptor.bDeviceProtocol == USB_HUB_PR_SS);
-}
-
/* Protect struct usb_device->state and ->children members
* Note: Both are also protected by ->dev.sem, except that ->state can
* change to USB_STATE_NOTATTACHED even when the semaphore isn't held. */
static struct task_struct *khubd_task;
+/* synchronize hub-port add/remove and peering operations */
+DEFINE_MUTEX(usb_port_peer_mutex);
+
/* cycle leds on hubs that aren't blinking for attention */
static bool blinkenlights = 0;
module_param (blinkenlights, bool, S_IRUGO);
NULL, 0, 1000);
}
+static char *to_led_name(int selector)
+{
+ switch (selector) {
+ case HUB_LED_AMBER:
+ return "amber";
+ case HUB_LED_GREEN:
+ return "green";
+ case HUB_LED_OFF:
+ return "off";
+ case HUB_LED_AUTO:
+ return "auto";
+ default:
+ return "??";
+ }
+}
+
/*
* USB 2.0 spec Section 11.24.2.7.1.10 and table 11-7
* for info about using port indicators
*/
-static void set_port_led(
- struct usb_hub *hub,
- int port1,
- int selector
-)
+static void set_port_led(struct usb_hub *hub, int port1, int selector)
{
- int status = set_port_feature(hub->hdev, (selector << 8) | port1,
+ struct usb_port *port_dev = hub->ports[port1 - 1];
+ int status;
+
+ status = set_port_feature(hub->hdev, (selector << 8) | port1,
USB_PORT_FEAT_INDICATOR);
- if (status < 0)
- dev_dbg (hub->intfdev,
- "port %d indicator %s status %d\n",
- port1,
- ({ char *s; switch (selector) {
- case HUB_LED_AMBER: s = "amber"; break;
- case HUB_LED_GREEN: s = "green"; break;
- case HUB_LED_OFF: s = "off"; break;
- case HUB_LED_AUTO: s = "auto"; break;
- default: s = "??"; break;
- } s; }),
- status);
+ dev_dbg(&port_dev->dev, "indicator %s status %d\n",
+ to_led_name(selector), status);
}
#define LED_CYCLE_PERIOD ((2*HZ)/3)
int port1, bool set)
{
int ret;
- struct usb_port *port_dev = hub->ports[port1 - 1];
if (set)
ret = set_port_feature(hdev, port1, USB_PORT_FEAT_POWER);
else
ret = usb_clear_port_feature(hdev, port1, USB_PORT_FEAT_POWER);
- if (!ret)
- port_dev->power_is_on = set;
- return ret;
+ if (ret)
+ return ret;
+
+ if (set)
+ set_bit(port1, hub->power_bits);
+ else
+ clear_bit(port1, hub->power_bits);
+ return 0;
}
/**
}
EXPORT_SYMBOL_GPL(usb_hub_clear_tt_buffer);
-/* If do_delay is false, return the number of milliseconds the caller
- * needs to delay.
- */
-static unsigned hub_power_on(struct usb_hub *hub, bool do_delay)
+static void hub_power_on(struct usb_hub *hub, bool do_delay)
{
int port1;
- unsigned pgood_delay = hub->descriptor->bPwrOn2PwrGood * 2;
- unsigned delay;
- u16 wHubCharacteristics =
- le16_to_cpu(hub->descriptor->wHubCharacteristics);
/* Enable power on each port. Some hubs have reserved values
* of LPSM (> 2) in their descriptors, even though they are
* but only emulate it. In all cases, the ports won't work
* unless we send these messages to the hub.
*/
- if ((wHubCharacteristics & HUB_CHAR_LPSM) < 2)
+ if (hub_is_port_power_switchable(hub))
dev_dbg(hub->intfdev, "enabling power on all ports\n");
else
dev_dbg(hub->intfdev, "trying to enable port power on "
"non-switchable hub\n");
for (port1 = 1; port1 <= hub->hdev->maxchild; port1++)
- if (hub->ports[port1 - 1]->power_is_on)
+ if (test_bit(port1, hub->power_bits))
set_port_feature(hub->hdev, port1, USB_PORT_FEAT_POWER);
else
usb_clear_port_feature(hub->hdev, port1,
USB_PORT_FEAT_POWER);
-
- /* Wait at least 100 msec for power to become stable */
- delay = max(pgood_delay, (unsigned) 100);
if (do_delay)
- msleep(delay);
- return delay;
+ msleep(hub_power_on_good_delay(hub));
}
static int hub_hub_status(struct usb_hub *hub,
msleep(HUB_DEBOUNCE_STEP);
}
if (total_time >= HUB_DEBOUNCE_TIMEOUT)
- dev_warn(hub->intfdev, "Could not disable port %d after %d ms\n",
- port1, total_time);
+ dev_warn(&hub->ports[port1 - 1]->dev,
+ "Could not disable after %d ms\n", total_time);
return hub_set_port_link_state(hub, port1, USB_SS_PORT_LS_RX_DETECT);
}
static int hub_port_disable(struct usb_hub *hub, int port1, int set_state)
{
+ struct usb_port *port_dev = hub->ports[port1 - 1];
struct usb_device *hdev = hub->hdev;
int ret = 0;
- if (hub->ports[port1 - 1]->child && set_state)
- usb_set_device_state(hub->ports[port1 - 1]->child,
- USB_STATE_NOTATTACHED);
+ if (port_dev->child && set_state)
+ usb_set_device_state(port_dev->child, USB_STATE_NOTATTACHED);
if (!hub->error) {
if (hub_is_superspeed(hub->hdev))
ret = hub_usb3_port_disable(hub, port1);
USB_PORT_FEAT_ENABLE);
}
if (ret && ret != -ENODEV)
- dev_err(hub->intfdev, "cannot disable port %d (err = %d)\n",
- port1, ret);
+ dev_err(&port_dev->dev, "cannot disable (err = %d)\n", ret);
return ret;
}
*/
static void hub_port_logical_disconnect(struct usb_hub *hub, int port1)
{
- dev_dbg(hub->intfdev, "logical disconnect on port %d\n", port1);
+ dev_dbg(&hub->ports[port1 - 1]->dev, "logical disconnect\n");
hub_port_disable(hub, port1, 1);
/* FIXME let caller ask to power down the port:
* for HUB_POST_RESET, but it's easier not to.
*/
if (type == HUB_INIT) {
- delay = hub_power_on(hub, false);
+ unsigned delay = hub_power_on_good_delay(hub);
+
+ hub_power_on(hub, false);
INIT_DELAYED_WORK(&hub->init_work, hub_init_func2);
queue_delayed_work(system_power_efficient_wq,
&hub->init_work,
}
init2:
- /* Check each port and set hub->change_bits to let khubd know
+ /*
+ * Check each port and set hub->change_bits to let khubd know
* which ports need attention.
*/
for (port1 = 1; port1 <= hdev->maxchild; ++port1) {
- struct usb_device *udev = hub->ports[port1 - 1]->child;
+ struct usb_port *port_dev = hub->ports[port1 - 1];
+ struct usb_device *udev = port_dev->child;
u16 portstatus, portchange;
portstatus = portchange = 0;
status = hub_port_status(hub, port1, &portstatus, &portchange);
if (udev || (portstatus & USB_PORT_STAT_CONNECTION))
- dev_dbg(hub->intfdev,
- "port %d: status %04x change %04x\n",
- port1, portstatus, portchange);
+ dev_dbg(&port_dev->dev, "status %04x change %04x\n",
+ portstatus, portchange);
- /* After anything other than HUB_RESUME (i.e., initialization
+ /*
+ * After anything other than HUB_RESUME (i.e., initialization
* or any sort of reset), every port should be disabled.
* Unconnected ports should likewise be disabled (paranoia),
* and so should ports for which we have no usb_device.
set_bit(port1, hub->change_bits);
} else if (udev->persist_enabled) {
- struct usb_port *port_dev = hub->ports[port1 - 1];
-
#ifdef CONFIG_PM
udev->reset_resume = 1;
#endif
/* Don't set the change_bits when the device
* was powered off.
*/
- if (port_dev->power_is_on)
+ if (test_bit(port1, hub->power_bits))
set_bit(port1, hub->change_bits);
} else {
flush_work(&hub->tt.clear_work);
}
+static void hub_pm_barrier_for_all_ports(struct usb_hub *hub)
+{
+ int i;
+
+ for (i = 0; i < hub->hdev->maxchild; ++i)
+ pm_runtime_barrier(&hub->ports[i]->dev);
+}
+
/* caller has locked the hub device */
static int hub_pre_reset(struct usb_interface *intf)
{
struct usb_hub *hub = usb_get_intfdata(intf);
hub_quiesce(hub, HUB_PRE_RESET);
+ hub->in_reset = 1;
+ hub_pm_barrier_for_all_ports(hub);
return 0;
}
{
struct usb_hub *hub = usb_get_intfdata(intf);
+ hub->in_reset = 0;
+ hub_pm_barrier_for_all_ports(hub);
hub_activate(hub, HUB_POST_RESET);
return 0;
}
char *message = "out of memory";
unsigned unit_load;
unsigned full_load;
+ unsigned maxchild;
hub->buffer = kmalloc(sizeof(*hub->buffer), GFP_KERNEL);
if (!hub->buffer) {
goto fail;
}
- hdev->maxchild = hub->descriptor->bNbrPorts;
- dev_info (hub_dev, "%d port%s detected\n", hdev->maxchild,
- (hdev->maxchild == 1) ? "" : "s");
+ maxchild = hub->descriptor->bNbrPorts;
+ dev_info(hub_dev, "%d port%s detected\n", maxchild,
+ (maxchild == 1) ? "" : "s");
- hub->ports = kzalloc(hdev->maxchild * sizeof(struct usb_port *),
- GFP_KERNEL);
+ hub->ports = kzalloc(maxchild * sizeof(struct usb_port *), GFP_KERNEL);
if (!hub->ports) {
ret = -ENOMEM;
goto fail;
int i;
char portstr[USB_MAXCHILDREN + 1];
- for (i = 0; i < hdev->maxchild; i++)
+ for (i = 0; i < maxchild; i++)
portstr[i] = hub->descriptor->u.hs.DeviceRemovable
[((i + 1) / 8)] & (1 << ((i + 1) % 8))
? 'F' : 'R';
- portstr[hdev->maxchild] = 0;
+ portstr[maxchild] = 0;
dev_dbg(hub_dev, "compound device; port removable status: %s\n", portstr);
} else
dev_dbg(hub_dev, "standalone hub\n");
if (hcd->power_budget > 0)
hdev->bus_mA = hcd->power_budget;
else
- hdev->bus_mA = full_load * hdev->maxchild;
+ hdev->bus_mA = full_load * maxchild;
if (hdev->bus_mA >= full_load)
hub->mA_per_port = full_load;
else {
hub->descriptor->bHubContrCurrent);
hub->limited_power = 1;
- if (remaining < hdev->maxchild * unit_load)
+ if (remaining < maxchild * unit_load)
dev_warn(hub_dev,
"insufficient power available "
"to use all downstream ports\n");
if (hub->has_indicators && blinkenlights)
hub->indicator[0] = INDICATOR_CYCLE;
- for (i = 0; i < hdev->maxchild; i++) {
+ mutex_lock(&usb_port_peer_mutex);
+ for (i = 0; i < maxchild; i++) {
ret = usb_hub_create_port_device(hub, i + 1);
if (ret < 0) {
dev_err(hub->intfdev,
"couldn't create port%d device.\n", i + 1);
- hdev->maxchild = i;
- goto fail_keep_maxchild;
+ break;
}
}
+ hdev->maxchild = i;
+ mutex_unlock(&usb_port_peer_mutex);
+ if (ret < 0)
+ goto fail;
usb_hub_adjust_deviceremovable(hdev, hub->descriptor);
return 0;
fail:
- hdev->maxchild = 0;
-fail_keep_maxchild:
dev_err (hub_dev, "config failed, %s (err %d)\n",
message, ret);
/* hub_disconnect() frees urb and descriptor */
hub->error = 0;
hub_quiesce(hub, HUB_DISCONNECT);
+ mutex_lock(&usb_port_peer_mutex);
+
/* Avoid races with recursively_mark_NOTATTACHED() */
spin_lock_irq(&device_state_lock);
port1 = hdev->maxchild;
for (; port1 > 0; --port1)
usb_hub_remove_port_device(hub, port1);
+ mutex_unlock(&usb_port_peer_mutex);
+
if (hub->hdev->speed == USB_SPEED_HIGH)
highspeed_hubs--;
hcd->driver->free_dev(hcd, udev);
}
+static void hub_disconnect_children(struct usb_device *udev)
+{
+ struct usb_hub *hub = usb_hub_to_struct_hub(udev);
+ int i;
+
+ /* Free up all the children before we remove this device */
+ for (i = 0; i < udev->maxchild; i++) {
+ if (hub->ports[i]->child)
+ usb_disconnect(&hub->ports[i]->child);
+ }
+}
+
/**
* usb_disconnect - disconnect a device (usbcore-internal)
* @pdev: pointer to device being disconnected
*/
void usb_disconnect(struct usb_device **pdev)
{
- struct usb_device *udev = *pdev;
- struct usb_hub *hub = usb_hub_to_struct_hub(udev);
- int i;
+ struct usb_port *port_dev = NULL;
+ struct usb_device *udev = *pdev;
+ struct usb_hub *hub;
+ int port1;
/* mark the device as inactive, so any further urb submissions for
* this device (and any of its children) will fail immediately.
usb_lock_device(udev);
- /* Free up all the children before we remove this device */
- for (i = 0; i < udev->maxchild; i++) {
- if (hub->ports[i]->child)
- usb_disconnect(&hub->ports[i]->child);
- }
+ hub_disconnect_children(udev);
/* deallocate hcd/hardware state ... nuking all pending urbs and
* cleaning up all state associated with the current configuration
usb_hcd_synchronize_unlinks(udev);
if (udev->parent) {
- struct usb_hub *hub = usb_hub_to_struct_hub(udev->parent);
- struct usb_port *port_dev = hub->ports[udev->portnum - 1];
+ port1 = udev->portnum;
+ hub = usb_hub_to_struct_hub(udev->parent);
+ port_dev = hub->ports[port1 - 1];
sysfs_remove_link(&udev->dev.kobj, "port");
sysfs_remove_link(&port_dev->dev.kobj, "device");
- if (!port_dev->did_runtime_put)
- pm_runtime_put(&port_dev->dev);
- else
- port_dev->did_runtime_put = false;
+ /*
+ * As usb_port_runtime_resume() de-references udev, make
+ * sure no resumes occur during removal
+ */
+ if (!test_and_set_bit(port1, hub->child_usage_bits))
+ pm_runtime_get_sync(&port_dev->dev);
}
usb_remove_ep_devs(&udev->ep0);
*pdev = NULL;
spin_unlock_irq(&device_state_lock);
+ if (port_dev && test_and_clear_bit(port1, hub->child_usage_bits))
+ pm_runtime_put(&port_dev->dev);
+
hub_free_dev(udev);
put_device(&udev->dev);
udev->removable = USB_DEVICE_REMOVABLE;
else
udev->removable = USB_DEVICE_FIXED;
+
+ /*
+ * Platform firmware may have populated an alternative value for
+ * removable. If the parent port has a known connect_type use
+ * that instead.
+ */
+ switch (hub->ports[udev->portnum - 1]->connect_type) {
+ case USB_PORT_CONNECT_TYPE_HOT_PLUG:
+ udev->removable = USB_DEVICE_REMOVABLE;
+ break;
+ case USB_PORT_CONNECT_TYPE_HARD_WIRED:
+ udev->removable = USB_DEVICE_FIXED;
+ break;
+ default: /* use what was set above */
+ break;
+ }
}
/**
device_enable_async_suspend(&udev->dev);
- /*
- * check whether the hub marks this port as non-removable. Do it
- * now so that platform-specific data can override it in
- * device_add()
- */
+ /* check whether the hub or firmware marks this port as non-removable */
if (udev->parent)
set_usb_port_removable(udev);
/* Create link files between child device and usb port device. */
if (udev->parent) {
struct usb_hub *hub = usb_hub_to_struct_hub(udev->parent);
- struct usb_port *port_dev = hub->ports[udev->portnum - 1];
+ int port1 = udev->portnum;
+ struct usb_port *port_dev = hub->ports[port1 - 1];
err = sysfs_create_link(&udev->dev.kobj,
&port_dev->dev.kobj, "port");
goto fail;
}
- pm_runtime_get_sync(&port_dev->dev);
+ if (!test_and_set_bit(port1, hub->child_usage_bits))
+ pm_runtime_get_sync(&port_dev->dev);
}
(void) usb_create_ep_devs(&udev->dev, &udev->ep0, udev);
if (delay_time >= 2 * HUB_SHORT_RESET_TIME)
delay = HUB_LONG_RESET_TIME;
- dev_dbg (hub->intfdev,
- "port %d not %sreset yet, waiting %dms\n",
- port1, warm ? "warm " : "", delay);
+ dev_dbg(&hub->ports[port1 - 1]->dev,
+ "not %sreset yet, waiting %dms\n",
+ warm ? "warm " : "", delay);
}
if ((portstatus & USB_PORT_STAT_RESET))
{
int i, status;
u16 portchange, portstatus;
+ struct usb_port *port_dev = hub->ports[port1 - 1];
if (!hub_is_superspeed(hub->hdev)) {
if (warm) {
if (status == -ENODEV) {
; /* The hub is gone */
} else if (status) {
- dev_err(hub->intfdev,
- "cannot %sreset port %d (err = %d)\n",
- warm ? "warm " : "", port1, status);
+ dev_err(&port_dev->dev,
+ "cannot %sreset (err = %d)\n",
+ warm ? "warm " : "", status);
} else {
status = hub_port_wait_reset(hub, port1, udev, delay,
warm);
* hot or warm reset failed. Try another warm reset.
*/
if (!warm) {
- dev_dbg(hub->intfdev, "hot reset failed, warm reset port %d\n",
- port1);
+ dev_dbg(&port_dev->dev,
+ "hot reset failed, warm reset\n");
warm = true;
}
}
- dev_dbg (hub->intfdev,
- "port %d not enabled, trying %sreset again...\n",
- port1, warm ? "warm " : "");
+ dev_dbg(&port_dev->dev,
+ "not enabled, trying %sreset again...\n",
+ warm ? "warm " : "");
delay = HUB_LONG_RESET_TIME;
}
- dev_err (hub->intfdev,
- "Cannot enable port %i. Maybe the USB cable is bad?\n",
- port1);
+ dev_err(&port_dev->dev, "Cannot enable. Maybe the USB cable is bad?\n");
done:
if (!hub_is_superspeed(hub->hdev))
return ret;
}
+static void usb_lock_port(struct usb_port *port_dev)
+ __acquires(&port_dev->status_lock)
+{
+ mutex_lock(&port_dev->status_lock);
+ __acquire(&port_dev->status_lock);
+}
+
+static void usb_unlock_port(struct usb_port *port_dev)
+ __releases(&port_dev->status_lock)
+{
+ mutex_unlock(&port_dev->status_lock);
+ __release(&port_dev->status_lock);
+}
+
#ifdef CONFIG_PM
/* Check if a port is suspended(USB2.0 port) or in U3 state(USB3.0 port) */
struct usb_hub *hub, int port1,
int status, unsigned portchange, unsigned portstatus)
{
+ struct usb_port *port_dev = hub->ports[port1 - 1];
+
/* Is the device still present? */
if (status || port_is_suspended(hub, portstatus) ||
!port_is_power_on(hub, portstatus) ||
}
if (status) {
- dev_dbg(hub->intfdev,
- "port %d status %04x.%04x after resume, %d\n",
- port1, portchange, portstatus, status);
+ dev_dbg(&port_dev->dev, "status %04x.%04x after resume, %d\n",
+ portchange, portstatus, status);
} else if (udev->reset_resume) {
/* Late port handoff can set status-change bits */
int status;
bool really_suspend = true;
+ usb_lock_port(port_dev);
+
/* enable remote wakeup when appropriate; this lets the device
* wake up the upstream hub (including maybe the root hub).
*
status = 0;
}
if (status) {
- dev_dbg(hub->intfdev, "can't suspend port %d, status %d\n",
- port1, status);
+ dev_dbg(&port_dev->dev, "can't suspend, status %d\n", status);
/* Try to enable USB3 LPM and LTM again */
usb_unlocked_enable_lpm(udev);
usb_set_device_state(udev, USB_STATE_SUSPENDED);
}
- if (status == 0 && !udev->do_remote_wakeup && udev->persist_enabled) {
+ if (status == 0 && !udev->do_remote_wakeup && udev->persist_enabled
+ && test_and_clear_bit(port1, hub->child_usage_bits))
pm_runtime_put_sync(&port_dev->dev);
- port_dev->did_runtime_put = true;
- }
usb_mark_last_busy(hub->hdev);
+
+ usb_unlock_port(port_dev);
return status;
}
int status;
u16 portchange, portstatus;
- if (port_dev->did_runtime_put) {
+ if (!test_and_set_bit(port1, hub->child_usage_bits)) {
status = pm_runtime_get_sync(&port_dev->dev);
- port_dev->did_runtime_put = false;
if (status < 0) {
dev_dbg(&udev->dev, "can't resume usb port, status %d\n",
status);
}
}
+ usb_lock_port(port_dev);
+
/* Skip the initial Clear-Suspend step for a remote wakeup */
status = hub_port_status(hub, port1, &portstatus, &portchange);
if (status == 0 && !port_is_suspended(hub, portstatus))
goto SuspendCleared;
- /* dev_dbg(hub->intfdev, "resume port %d\n", port1); */
-
- set_bit(port1, hub->busy_bits);
-
/* see 7.1.7.7; affects power usage, but not budgeting */
if (hub_is_superspeed(hub->hdev))
status = hub_set_port_link_state(hub, port1, USB_SS_PORT_LS_U0);
status = usb_clear_port_feature(hub->hdev,
port1, USB_PORT_FEAT_SUSPEND);
if (status) {
- dev_dbg(hub->intfdev, "can't resume port %d, status %d\n",
- port1, status);
+ dev_dbg(&port_dev->dev, "can't resume, status %d\n", status);
} else {
/* drive resume for at least 20 msec */
dev_dbg(&udev->dev, "usb %sresume\n",
}
}
- clear_bit(port1, hub->busy_bits);
-
status = check_port_resume_type(udev,
hub, port1, status, portchange, portstatus);
if (status == 0)
usb_unlocked_enable_lpm(udev);
}
+ usb_unlock_port(port_dev);
+
return status;
}
#ifdef CONFIG_PM_RUNTIME
-/* caller has locked udev */
int usb_remote_wakeup(struct usb_device *udev)
{
int status = 0;
+ usb_lock_device(udev);
if (udev->state == USB_STATE_SUSPENDED) {
dev_dbg(&udev->dev, "usb %sresume\n", "wakeup-");
status = usb_autoresume_device(udev);
usb_autosuspend_device(udev);
}
}
+ usb_unlock_device(udev);
return status;
}
+/* Returns 1 if there was a remote wakeup and a connect status change. */
+static int hub_handle_remote_wakeup(struct usb_hub *hub, unsigned int port,
+ u16 portstatus, u16 portchange)
+ __must_hold(&port_dev->status_lock)
+{
+ struct usb_port *port_dev = hub->ports[port - 1];
+ struct usb_device *hdev;
+ struct usb_device *udev;
+ int connect_change = 0;
+ int ret;
+
+ hdev = hub->hdev;
+ udev = port_dev->child;
+ if (!hub_is_superspeed(hdev)) {
+ if (!(portchange & USB_PORT_STAT_C_SUSPEND))
+ return 0;
+ usb_clear_port_feature(hdev, port, USB_PORT_FEAT_C_SUSPEND);
+ } else {
+ if (!udev || udev->state != USB_STATE_SUSPENDED ||
+ (portstatus & USB_PORT_STAT_LINK_STATE) !=
+ USB_SS_PORT_LS_U0)
+ return 0;
+ }
+
+ if (udev) {
+ /* TRSMRCY = 10 msec */
+ msleep(10);
+
+ usb_unlock_port(port_dev);
+ ret = usb_remote_wakeup(udev);
+ usb_lock_port(port_dev);
+ if (ret < 0)
+ connect_change = 1;
+ } else {
+ ret = -ENODEV;
+ hub_port_disable(hub, port, 1);
+ }
+ dev_dbg(&port_dev->dev, "resume, status %d\n", ret);
+ return connect_change;
+}
+
+#else
+
+static int hub_handle_remote_wakeup(struct usb_hub *hub, unsigned int port,
+ u16 portstatus, u16 portchange)
+{
+ return 0;
+}
+
#endif
static int check_ports_changed(struct usb_hub *hub)
*/
hub->wakeup_enabled_descendants = 0;
for (port1 = 1; port1 <= hdev->maxchild; port1++) {
- struct usb_device *udev;
+ struct usb_port *port_dev = hub->ports[port1 - 1];
+ struct usb_device *udev = port_dev->child;
- udev = hub->ports[port1 - 1]->child;
if (udev && udev->can_submit) {
- dev_warn(&intf->dev, "port %d not suspended yet\n",
- port1);
+ dev_warn(&port_dev->dev, "not suspended yet\n");
if (PMSG_IS_AUTO(msg))
return -EBUSY;
}
void usb_enable_ltm(struct usb_device *udev) { }
EXPORT_SYMBOL_GPL(usb_enable_ltm);
+static int hub_handle_remote_wakeup(struct usb_hub *hub, unsigned int port,
+ u16 portstatus, u16 portchange)
+{
+ return 0;
+}
+
#endif /* CONFIG_PM */
int hub_port_debounce(struct usb_hub *hub, int port1, bool must_be_connected)
{
int ret;
- int total_time, stable_time = 0;
u16 portchange, portstatus;
unsigned connection = 0xffff;
+ int total_time, stable_time = 0;
+ struct usb_port *port_dev = hub->ports[port1 - 1];
for (total_time = 0; ; total_time += HUB_DEBOUNCE_STEP) {
ret = hub_port_status(hub, port1, &portstatus, &portchange);
msleep(HUB_DEBOUNCE_STEP);
}
- dev_dbg (hub->intfdev,
- "debounce: port %d: total %dms stable %dms status 0x%x\n",
- port1, total_time, stable_time, portstatus);
+ dev_dbg(&port_dev->dev, "debounce total %dms stable %dms status 0x%x\n",
+ total_time, stable_time, portstatus);
if (stable_time < HUB_DEBOUNCE_STABLE)
return -ETIMEDOUT;
*/
static void hub_set_initial_usb2_lpm_policy(struct usb_device *udev)
{
- int connect_type;
+ struct usb_hub *hub = usb_hub_to_struct_hub(udev->parent);
+ int connect_type = USB_PORT_CONNECT_TYPE_UNKNOWN;
if (!udev->usb2_hw_lpm_capable)
return;
- connect_type = usb_get_hub_port_connect_type(udev->parent,
- udev->portnum);
+ if (hub)
+ connect_type = hub->ports[udev->portnum - 1]->connect_type;
if ((udev->bos->ext_cap->bmAttributes & cpu_to_le32(USB_BESL_SUPPORT)) ||
connect_type == USB_PORT_CONNECT_TYPE_HARD_WIRED) {
* Returns device in USB_STATE_ADDRESS, except on error.
*
* If this is called for an already-existing device (as part of
- * usb_reset_and_verify_device), the caller must own the device lock. For a
- * newly detected device that is not accessible through any global
- * pointers, it's not necessary to lock the device.
+ * usb_reset_and_verify_device), the caller must own the device lock and
+ * the port lock. For a newly detected device that is not accessible
+ * through any global pointers, it's not necessary to lock the device,
+ * but it is still necessary to lock the port.
*/
static int
hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
int retry_counter)
{
- static DEFINE_MUTEX(usb_address0_mutex);
-
struct usb_device *hdev = hub->hdev;
struct usb_hcd *hcd = bus_to_hcd(hdev->bus);
int i, j, retval;
if (oldspeed == USB_SPEED_LOW)
delay = HUB_LONG_RESET_TIME;
- mutex_lock(&usb_address0_mutex);
+ mutex_lock(&hdev->bus->usb_address0_mutex);
/* Reset the device; full speed may morph to high speed */
/* FIXME a USB 2.0 device may morph into SuperSpeed on reset. */
hub_port_disable(hub, port1, 0);
update_devnum(udev, devnum); /* for disconnect processing */
}
- mutex_unlock(&usb_address0_mutex);
+ mutex_unlock(&hdev->bus->usb_address0_mutex);
return retval;
}
remaining = hdev->bus_mA - hub->descriptor->bHubContrCurrent;
for (port1 = 1; port1 <= hdev->maxchild; ++port1) {
- struct usb_device *udev = hub->ports[port1 - 1]->child;
- int delta;
- unsigned unit_load;
+ struct usb_port *port_dev = hub->ports[port1 - 1];
+ struct usb_device *udev = port_dev->child;
+ unsigned unit_load;
+ int delta;
if (!udev)
continue;
else
delta = 8;
if (delta > hub->mA_per_port)
- dev_warn(&udev->dev,
- "%dmA is over %umA budget for port %d!\n",
- delta, hub->mA_per_port, port1);
+ dev_warn(&port_dev->dev, "%dmA is over %umA budget!\n",
+ delta, hub->mA_per_port);
remaining -= delta;
}
if (remaining < 0) {
return remaining;
}
-/* Handle physical or logical connection change events.
- * This routine is called when:
- * a port connection-change occurs;
- * a port enable-change occurs (often caused by EMI);
- * usb_reset_and_verify_device() encounters changed descriptors (as from
- * a firmware download)
- * caller already locked the hub
- */
-static void hub_port_connect_change(struct usb_hub *hub, int port1,
- u16 portstatus, u16 portchange)
+static void hub_port_connect(struct usb_hub *hub, int port1, u16 portstatus,
+ u16 portchange)
{
- struct usb_device *hdev = hub->hdev;
- struct device *hub_dev = hub->intfdev;
- struct usb_hcd *hcd = bus_to_hcd(hdev->bus);
- unsigned wHubCharacteristics =
- le16_to_cpu(hub->descriptor->wHubCharacteristics);
- struct usb_device *udev;
int status, i;
unsigned unit_load;
-
- dev_dbg (hub_dev,
- "port %d, status %04x, change %04x, %s\n",
- port1, portstatus, portchange, portspeed(hub, portstatus));
-
- if (hub->has_indicators) {
- set_port_led(hub, port1, HUB_LED_AUTO);
- hub->indicator[port1-1] = INDICATOR_AUTO;
- }
-
-#ifdef CONFIG_USB_OTG
- /* during HNP, don't repeat the debounce */
- if (hdev->bus->is_b_host)
- portchange &= ~(USB_PORT_STAT_C_CONNECTION |
- USB_PORT_STAT_C_ENABLE);
-#endif
-
- /* Try to resuscitate an existing device */
- udev = hub->ports[port1 - 1]->child;
- if ((portstatus & USB_PORT_STAT_CONNECTION) && udev &&
- udev->state != USB_STATE_NOTATTACHED) {
- usb_lock_device(udev);
- if (portstatus & USB_PORT_STAT_ENABLE) {
- status = 0; /* Nothing to do */
-
-#ifdef CONFIG_PM_RUNTIME
- } else if (udev->state == USB_STATE_SUSPENDED &&
- udev->persist_enabled) {
- /* For a suspended device, treat this as a
- * remote wakeup event.
- */
- status = usb_remote_wakeup(udev);
-#endif
-
- } else {
- status = -ENODEV; /* Don't resuscitate */
- }
- usb_unlock_device(udev);
-
- if (status == 0) {
- clear_bit(port1, hub->change_bits);
- return;
- }
- }
+ struct usb_device *hdev = hub->hdev;
+ struct usb_hcd *hcd = bus_to_hcd(hdev->bus);
+ struct usb_port *port_dev = hub->ports[port1 - 1];
+ struct usb_device *udev = port_dev->child;
/* Disconnect any existing devices under this port */
if (udev) {
if (hcd->phy && !hdev->parent &&
!(portstatus & USB_PORT_STAT_CONNECTION))
usb_phy_notify_disconnect(hcd->phy, udev->speed);
- usb_disconnect(&hub->ports[port1 - 1]->child);
+ usb_disconnect(&port_dev->child);
}
- clear_bit(port1, hub->change_bits);
/* We can forget about a "removed" device when there's a physical
* disconnect or the connect status changes.
status = hub_port_debounce_be_stable(hub, port1);
if (status < 0) {
if (status != -ENODEV && printk_ratelimit())
- dev_err(hub_dev, "connect-debounce failed, "
- "port %d disabled\n", port1);
+ dev_err(&port_dev->dev,
+ "connect-debounce failed\n");
portstatus &= ~USB_PORT_STAT_CONNECTION;
} else {
portstatus = status;
test_bit(port1, hub->removed_bits)) {
/* maybe switch power back on (e.g. root hub was reset) */
- if ((wHubCharacteristics & HUB_CHAR_LPSM) < 2
+ if (hub_is_port_power_switchable(hub)
&& !port_is_power_on(hub, portstatus))
set_port_feature(hdev, port1, USB_PORT_FEAT_POWER);
*/
udev = usb_alloc_dev(hdev, hdev->bus, port1);
if (!udev) {
- dev_err (hub_dev,
- "couldn't allocate port %d usb_device\n",
- port1);
+ dev_err(&port_dev->dev,
+ "couldn't allocate usb_device\n");
goto done;
}
}
/* reset (non-USB 3.0 devices) and get descriptor */
+ usb_lock_port(port_dev);
status = hub_port_init(hub, udev, port1, i);
+ usb_unlock_port(port_dev);
if (status < 0)
goto loop;
*/
status = 0;
+ mutex_lock(&usb_port_peer_mutex);
+
/* We mustn't add new devices if the parent hub has
* been disconnected; we would race with the
* recursively_mark_NOTATTACHED() routine.
if (hdev->state == USB_STATE_NOTATTACHED)
status = -ENOTCONN;
else
- hub->ports[port1 - 1]->child = udev;
+ port_dev->child = udev;
spin_unlock_irq(&device_state_lock);
+ mutex_unlock(&usb_port_peer_mutex);
/* Run it through the hoops (find a driver, etc) */
if (!status) {
status = usb_new_device(udev);
if (status) {
+ mutex_lock(&usb_port_peer_mutex);
spin_lock_irq(&device_state_lock);
- hub->ports[port1 - 1]->child = NULL;
+ port_dev->child = NULL;
spin_unlock_irq(&device_state_lock);
+ mutex_unlock(&usb_port_peer_mutex);
}
}
status = hub_power_remaining(hub);
if (status)
- dev_dbg(hub_dev, "%dmA power budget left\n", status);
+ dev_dbg(hub->intfdev, "%dmA power budget left\n", status);
return;
!hcd->driver->port_handed_over ||
!(hcd->driver->port_handed_over)(hcd, port1)) {
if (status != -ENOTCONN && status != -ENODEV)
- dev_err(hub_dev, "unable to enumerate USB device on port %d\n",
- port1);
+ dev_err(&port_dev->dev,
+ "unable to enumerate USB device\n");
}
done:
hub_port_disable(hub, port1, 1);
if (hcd->driver->relinquish_port && !hub->hdev->parent)
hcd->driver->relinquish_port(hcd, port1);
+
}
-/* Returns 1 if there was a remote wakeup and a connect status change. */
-static int hub_handle_remote_wakeup(struct usb_hub *hub, unsigned int port,
- u16 portstatus, u16 portchange)
+/* Handle physical or logical connection change events.
+ * This routine is called when:
+ * a port connection-change occurs;
+ * a port enable-change occurs (often caused by EMI);
+ * usb_reset_and_verify_device() encounters changed descriptors (as from
+ * a firmware download)
+ * caller already locked the hub
+ */
+static void hub_port_connect_change(struct usb_hub *hub, int port1,
+ u16 portstatus, u16 portchange)
+ __must_hold(&port_dev->status_lock)
{
- struct usb_device *hdev;
- struct usb_device *udev;
- int connect_change = 0;
- int ret;
+ struct usb_port *port_dev = hub->ports[port1 - 1];
+ struct usb_device *udev = port_dev->child;
+ int status = -ENODEV;
- hdev = hub->hdev;
- udev = hub->ports[port - 1]->child;
- if (!hub_is_superspeed(hdev)) {
- if (!(portchange & USB_PORT_STAT_C_SUSPEND))
- return 0;
- usb_clear_port_feature(hdev, port, USB_PORT_FEAT_C_SUSPEND);
- } else {
- if (!udev || udev->state != USB_STATE_SUSPENDED ||
- (portstatus & USB_PORT_STAT_LINK_STATE) !=
- USB_SS_PORT_LS_U0)
- return 0;
+ dev_dbg(&port_dev->dev, "status %04x, change %04x, %s\n", portstatus,
+ portchange, portspeed(hub, portstatus));
+
+ if (hub->has_indicators) {
+ set_port_led(hub, port1, HUB_LED_AUTO);
+ hub->indicator[port1-1] = INDICATOR_AUTO;
}
- if (udev) {
- /* TRSMRCY = 10 msec */
- msleep(10);
+#ifdef CONFIG_USB_OTG
+ /* during HNP, don't repeat the debounce */
+ if (hub->hdev->bus->is_b_host)
+ portchange &= ~(USB_PORT_STAT_C_CONNECTION |
+ USB_PORT_STAT_C_ENABLE);
+#endif
+
+ /* Try to resuscitate an existing device */
+ if ((portstatus & USB_PORT_STAT_CONNECTION) && udev &&
+ udev->state != USB_STATE_NOTATTACHED) {
+ if (portstatus & USB_PORT_STAT_ENABLE) {
+ status = 0; /* Nothing to do */
+#ifdef CONFIG_PM_RUNTIME
+ } else if (udev->state == USB_STATE_SUSPENDED &&
+ udev->persist_enabled) {
+ /* For a suspended device, treat this as a
+ * remote wakeup event.
+ */
+ usb_unlock_port(port_dev);
+ status = usb_remote_wakeup(udev);
+ usb_lock_port(port_dev);
+#endif
+ } else {
+ /* Don't resuscitate */;
+ }
+ }
+ clear_bit(port1, hub->change_bits);
+
+ /* successfully revalidated the connection */
+ if (status == 0)
+ return;
+
+ usb_unlock_port(port_dev);
+ hub_port_connect(hub, port1, portstatus, portchange);
+ usb_lock_port(port_dev);
+}
+
+static void port_event(struct usb_hub *hub, int port1)
+ __must_hold(&port_dev->status_lock)
+{
+ int connect_change, reset_device = 0;
+ struct usb_port *port_dev = hub->ports[port1 - 1];
+ struct usb_device *udev = port_dev->child;
+ struct usb_device *hdev = hub->hdev;
+ u16 portstatus, portchange;
+
+ connect_change = test_bit(port1, hub->change_bits);
+ clear_bit(port1, hub->event_bits);
+ clear_bit(port1, hub->wakeup_bits);
+
+ if (hub_port_status(hub, port1, &portstatus, &portchange) < 0)
+ return;
+
+ if (portchange & USB_PORT_STAT_C_CONNECTION) {
+ usb_clear_port_feature(hdev, port1, USB_PORT_FEAT_C_CONNECTION);
+ connect_change = 1;
+ }
+
+ if (portchange & USB_PORT_STAT_C_ENABLE) {
+ if (!connect_change)
+ dev_dbg(&port_dev->dev, "enable change, status %08x\n",
+ portstatus);
+ usb_clear_port_feature(hdev, port1, USB_PORT_FEAT_C_ENABLE);
+
+ /*
+ * EM interference sometimes causes badly shielded USB devices
+ * to be shutdown by the hub, this hack enables them again.
+ * Works at least with mouse driver.
+ */
+ if (!(portstatus & USB_PORT_STAT_ENABLE)
+ && !connect_change && udev) {
+ dev_err(&port_dev->dev, "disabled by hub (EMI?), re-enabling...\n");
+ connect_change = 1;
+ }
+ }
+
+ if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
+ u16 status = 0, unused;
+
+ dev_dbg(&port_dev->dev, "over-current change\n");
+ usb_clear_port_feature(hdev, port1,
+ USB_PORT_FEAT_C_OVER_CURRENT);
+ msleep(100); /* Cool down */
+ hub_power_on(hub, true);
+ hub_port_status(hub, port1, &status, &unused);
+ if (status & USB_PORT_STAT_OVERCURRENT)
+ dev_err(&port_dev->dev, "over-current condition\n");
+ }
+
+ if (portchange & USB_PORT_STAT_C_RESET) {
+ dev_dbg(&port_dev->dev, "reset change\n");
+ usb_clear_port_feature(hdev, port1, USB_PORT_FEAT_C_RESET);
+ }
+ if ((portchange & USB_PORT_STAT_C_BH_RESET)
+ && hub_is_superspeed(hdev)) {
+ dev_dbg(&port_dev->dev, "warm reset change\n");
+ usb_clear_port_feature(hdev, port1,
+ USB_PORT_FEAT_C_BH_PORT_RESET);
+ }
+ if (portchange & USB_PORT_STAT_C_LINK_STATE) {
+ dev_dbg(&port_dev->dev, "link state change\n");
+ usb_clear_port_feature(hdev, port1,
+ USB_PORT_FEAT_C_PORT_LINK_STATE);
+ }
+ if (portchange & USB_PORT_STAT_C_CONFIG_ERROR) {
+ dev_warn(&port_dev->dev, "config error\n");
+ usb_clear_port_feature(hdev, port1,
+ USB_PORT_FEAT_C_PORT_CONFIG_ERROR);
+ }
+
+ /* skip port actions that require the port to be powered on */
+ if (!pm_runtime_active(&port_dev->dev))
+ return;
+ if (hub_handle_remote_wakeup(hub, port1, portstatus, portchange))
+ connect_change = 1;
+
+ /*
+ * Warm reset a USB3 protocol port if it's in
+ * SS.Inactive state.
+ */
+ if (hub_port_warm_reset_required(hub, portstatus)) {
+ dev_dbg(&port_dev->dev, "do warm reset\n");
+ if (!udev || !(portstatus & USB_PORT_STAT_CONNECTION)
+ || udev->state == USB_STATE_NOTATTACHED) {
+ if (hub_port_reset(hub, port1, NULL,
+ HUB_BH_RESET_TIME, true) < 0)
+ hub_port_disable(hub, port1, 1);
+ } else
+ reset_device = 1;
+ }
+
+ /*
+ * On disconnect USB3 protocol ports transit from U0 to
+ * SS.Inactive to Rx.Detect. If this happens a warm-
+ * reset is not needed, but a (re)connect may happen
+ * before khubd runs and sees the disconnect, and the
+ * device may be an unknown state.
+ *
+ * If the port went through SS.Inactive without khubd
+ * seeing it the C_LINK_STATE change flag will be set,
+ * and we reset the dev to put it in a known state.
+ */
+ if (reset_device || (udev && hub_is_superspeed(hub->hdev)
+ && (portchange & USB_PORT_STAT_C_LINK_STATE)
+ && (portstatus & USB_PORT_STAT_CONNECTION))) {
+ usb_unlock_port(port_dev);
usb_lock_device(udev);
- ret = usb_remote_wakeup(udev);
+ usb_reset_device(udev);
usb_unlock_device(udev);
- if (ret < 0)
- connect_change = 1;
- } else {
- ret = -ENODEV;
- hub_port_disable(hub, port, 1);
+ usb_lock_port(port_dev);
+ connect_change = 0;
}
- dev_dbg(hub->intfdev, "resume on port %d, status %d\n",
- port, ret);
- return connect_change;
+
+ if (connect_change)
+ hub_port_connect_change(hub, port1, portstatus, portchange);
}
+
static void hub_events(void)
{
struct list_head *tmp;
struct device *hub_dev;
u16 hubstatus;
u16 hubchange;
- u16 portstatus;
- u16 portchange;
int i, ret;
- int connect_change, wakeup_change;
/*
* We restart the list every time to avoid a deadlock with
/* deal with port status changes */
for (i = 1; i <= hdev->maxchild; i++) {
- struct usb_device *udev = hub->ports[i - 1]->child;
-
- if (test_bit(i, hub->busy_bits))
- continue;
- connect_change = test_bit(i, hub->change_bits);
- wakeup_change = test_and_clear_bit(i, hub->wakeup_bits);
- if (!test_and_clear_bit(i, hub->event_bits) &&
- !connect_change && !wakeup_change)
- continue;
-
- ret = hub_port_status(hub, i,
- &portstatus, &portchange);
- if (ret < 0)
- continue;
-
- if (portchange & USB_PORT_STAT_C_CONNECTION) {
- usb_clear_port_feature(hdev, i,
- USB_PORT_FEAT_C_CONNECTION);
- connect_change = 1;
- }
-
- if (portchange & USB_PORT_STAT_C_ENABLE) {
- if (!connect_change)
- dev_dbg (hub_dev,
- "port %d enable change, "
- "status %08x\n",
- i, portstatus);
- usb_clear_port_feature(hdev, i,
- USB_PORT_FEAT_C_ENABLE);
+ struct usb_port *port_dev = hub->ports[i - 1];
+ if (test_bit(i, hub->event_bits)
+ || test_bit(i, hub->change_bits)
+ || test_bit(i, hub->wakeup_bits)) {
/*
- * EM interference sometimes causes badly
- * shielded USB devices to be shutdown by
- * the hub, this hack enables them again.
- * Works at least with mouse driver.
+ * The get_noresume and barrier ensure that if
+ * the port was in the process of resuming, we
+ * flush that work and keep the port active for
+ * the duration of the port_event(). However,
+ * if the port is runtime pm suspended
+ * (powered-off), we leave it in that state, run
+ * an abbreviated port_event(), and move on.
*/
- if (!(portstatus & USB_PORT_STAT_ENABLE)
- && !connect_change
- && hub->ports[i - 1]->child) {
- dev_err (hub_dev,
- "port %i "
- "disabled by hub (EMI?), "
- "re-enabling...\n",
- i);
- connect_change = 1;
- }
- }
-
- if (hub_handle_remote_wakeup(hub, i,
- portstatus, portchange))
- connect_change = 1;
-
- if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
- u16 status = 0;
- u16 unused;
-
- dev_dbg(hub_dev, "over-current change on port "
- "%d\n", i);
- usb_clear_port_feature(hdev, i,
- USB_PORT_FEAT_C_OVER_CURRENT);
- msleep(100); /* Cool down */
- hub_power_on(hub, true);
- hub_port_status(hub, i, &status, &unused);
- if (status & USB_PORT_STAT_OVERCURRENT)
- dev_err(hub_dev, "over-current "
- "condition on port %d\n", i);
- }
-
- if (portchange & USB_PORT_STAT_C_RESET) {
- dev_dbg (hub_dev,
- "reset change on port %d\n",
- i);
- usb_clear_port_feature(hdev, i,
- USB_PORT_FEAT_C_RESET);
- }
- if ((portchange & USB_PORT_STAT_C_BH_RESET) &&
- hub_is_superspeed(hub->hdev)) {
- dev_dbg(hub_dev,
- "warm reset change on port %d\n",
- i);
- usb_clear_port_feature(hdev, i,
- USB_PORT_FEAT_C_BH_PORT_RESET);
- }
- if (portchange & USB_PORT_STAT_C_LINK_STATE) {
- usb_clear_port_feature(hub->hdev, i,
- USB_PORT_FEAT_C_PORT_LINK_STATE);
- }
- if (portchange & USB_PORT_STAT_C_CONFIG_ERROR) {
- dev_warn(hub_dev,
- "config error on port %d\n",
- i);
- usb_clear_port_feature(hub->hdev, i,
- USB_PORT_FEAT_C_PORT_CONFIG_ERROR);
+ pm_runtime_get_noresume(&port_dev->dev);
+ pm_runtime_barrier(&port_dev->dev);
+ usb_lock_port(port_dev);
+ port_event(hub, i);
+ usb_unlock_port(port_dev);
+ pm_runtime_put_sync(&port_dev->dev);
}
-
- /* Warm reset a USB3 protocol port if it's in
- * SS.Inactive state.
- */
- if (hub_port_warm_reset_required(hub, portstatus)) {
- int status;
-
- dev_dbg(hub_dev, "warm reset port %d\n", i);
- if (!udev ||
- !(portstatus & USB_PORT_STAT_CONNECTION) ||
- udev->state == USB_STATE_NOTATTACHED) {
- status = hub_port_reset(hub, i,
- NULL, HUB_BH_RESET_TIME,
- true);
- if (status < 0)
- hub_port_disable(hub, i, 1);
- } else {
- usb_lock_device(udev);
- status = usb_reset_device(udev);
- usb_unlock_device(udev);
- connect_change = 0;
- }
- /*
- * On disconnect USB3 protocol ports transit from U0 to
- * SS.Inactive to Rx.Detect. If this happens a warm-
- * reset is not needed, but a (re)connect may happen
- * before khubd runs and sees the disconnect, and the
- * device may be an unknown state.
- *
- * If the port went through SS.Inactive without khubd
- * seeing it the C_LINK_STATE change flag will be set,
- * and we reset the dev to put it in a known state.
- */
- } else if (udev && hub_is_superspeed(hub->hdev) &&
- (portchange & USB_PORT_STAT_C_LINK_STATE) &&
- (portstatus & USB_PORT_STAT_CONNECTION)) {
- usb_lock_device(udev);
- usb_reset_device(udev);
- usb_unlock_device(udev);
- connect_change = 0;
- }
-
- if (connect_change)
- hub_port_connect_change(hub, i,
- portstatus, portchange);
- } /* end for i */
+ }
/* deal with hub status changes */
if (test_and_clear_bit(0, hub->event_bits) == 0)
* if the reset wasn't even attempted.
*
* Note:
- * The caller must own the device lock. For example, it's safe to use
- * this from a driver probe() routine after downloading new firmware.
- * For calls that might not occur during probe(), drivers should lock
- * the device using usb_lock_device_for_reset().
+ * The caller must own the device lock and the port lock, the latter is
+ * taken by usb_reset_device(). For example, it's safe to use
+ * usb_reset_device() from a driver probe() routine after downloading
+ * new firmware. For calls that might not occur during probe(), drivers
+ * should lock the device using usb_lock_device_for_reset().
*
* Locking exception: This routine may also be called from within an
* autoresume handler. Such usage won't conflict with other tasks
* holding the device lock because these tasks should always call
- * usb_autopm_resume_device(), thereby preventing any unwanted autoresume.
+ * usb_autopm_resume_device(), thereby preventing any unwanted
+ * autoresume. The autoresume handler is expected to have already
+ * acquired the port lock before calling this routine.
*/
static int usb_reset_and_verify_device(struct usb_device *udev)
{
return -EINVAL;
}
- if (!parent_hdev) {
- /* this requires hcd-specific logic; see ohci_restart() */
- dev_dbg(&udev->dev, "%s for root hub!\n", __func__);
+ if (!parent_hdev)
return -EISDIR;
- }
+
parent_hub = usb_hub_to_struct_hub(parent_hdev);
/* Disable USB2 hardware LPM.
goto re_enumerate;
}
- set_bit(port1, parent_hub->busy_bits);
for (i = 0; i < SET_CONFIG_TRIES; ++i) {
/* ep0 maxpacket size may change; let the HCD know about it.
if (ret >= 0 || ret == -ENOTCONN || ret == -ENODEV)
break;
}
- clear_bit(port1, parent_hub->busy_bits);
if (ret < 0)
goto re_enumerate;
int ret;
int i;
unsigned int noio_flag;
+ struct usb_port *port_dev;
struct usb_host_config *config = udev->actconfig;
+ struct usb_hub *hub = usb_hub_to_struct_hub(udev->parent);
if (udev->state == USB_STATE_NOTATTACHED ||
udev->state == USB_STATE_SUSPENDED) {
return -EINVAL;
}
+ if (!udev->parent) {
+ /* this requires hcd-specific logic; see ohci_restart() */
+ dev_dbg(&udev->dev, "%s for root hub!\n", __func__);
+ return -EISDIR;
+ }
+
+ port_dev = hub->ports[udev->portnum - 1];
+
/*
* Don't allocate memory with GFP_KERNEL in current
* context to avoid possible deadlock if usb mass
}
}
+ usb_lock_port(port_dev);
ret = usb_reset_and_verify_device(udev);
+ usb_unlock_port(port_dev);
if (config) {
for (i = config->desc.bNumInterfaces - 1; i >= 0; --i) {
}
EXPORT_SYMBOL_GPL(usb_hub_find_child);
-/**
- * usb_set_hub_port_connect_type - set hub port connect type.
- * @hdev: USB device belonging to the usb hub
- * @port1: port num of the port
- * @type: connect type of the port
- */
-void usb_set_hub_port_connect_type(struct usb_device *hdev, int port1,
- enum usb_port_connect_type type)
-{
- struct usb_hub *hub = usb_hub_to_struct_hub(hdev);
-
- if (hub)
- hub->ports[port1 - 1]->connect_type = type;
-}
-
-/**
- * usb_get_hub_port_connect_type - Get the port's connect type
- * @hdev: USB device belonging to the usb hub
- * @port1: port num of the port
- *
- * Return: The connect type of the port if successful. Or
- * USB_PORT_CONNECT_TYPE_UNKNOWN if input params are invalid.
- */
-enum usb_port_connect_type
-usb_get_hub_port_connect_type(struct usb_device *hdev, int port1)
-{
- struct usb_hub *hub = usb_hub_to_struct_hub(hdev);
-
- if (!hub)
- return USB_PORT_CONNECT_TYPE_UNKNOWN;
-
- return hub->ports[port1 - 1]->connect_type;
-}
-
void usb_hub_adjust_deviceremovable(struct usb_device *hdev,
struct usb_hub_descriptor *desc)
{
+ struct usb_hub *hub = usb_hub_to_struct_hub(hdev);
enum usb_port_connect_type connect_type;
int i;
+ if (!hub)
+ return;
+
if (!hub_is_superspeed(hdev)) {
for (i = 1; i <= hdev->maxchild; i++) {
- connect_type = usb_get_hub_port_connect_type(hdev, i);
+ struct usb_port *port_dev = hub->ports[i - 1];
+ connect_type = port_dev->connect_type;
if (connect_type == USB_PORT_CONNECT_TYPE_HARD_WIRED) {
u8 mask = 1 << (i%8);
if (!(desc->u.hs.DeviceRemovable[i/8] & mask)) {
- dev_dbg(&hdev->dev, "usb port%d's DeviceRemovable is changed to 1 according to platform information.\n",
- i);
+ dev_dbg(&port_dev->dev, "DeviceRemovable is changed to 1 according to platform information.\n");
desc->u.hs.DeviceRemovable[i/8] |= mask;
}
}
u16 port_removable = le16_to_cpu(desc->u.ss.DeviceRemovable);
for (i = 1; i <= hdev->maxchild; i++) {
- connect_type = usb_get_hub_port_connect_type(hdev, i);
+ struct usb_port *port_dev = hub->ports[i - 1];
+ connect_type = port_dev->connect_type;
if (connect_type == USB_PORT_CONNECT_TYPE_HARD_WIRED) {
u16 mask = 1 << i;
if (!(port_removable & mask)) {
- dev_dbg(&hdev->dev, "usb port%d's DeviceRemovable is changed to 1 according to platform information.\n",
- i);
+ dev_dbg(&port_dev->dev, "DeviceRemovable is changed to 1 according to platform information.\n");
port_removable |= mask;
}
}
projects / karo-tx-linux.git / blobdiff