unsigned int pipe;
int maxp, ret, i;
char *message = "out of memory";
+ unsigned unit_load;
+ unsigned full_load;
hub->buffer = kmalloc(sizeof(*hub->buffer), GFP_KERNEL);
if (!hub->buffer) {
}
wHubCharacteristics = le16_to_cpu(hub->descriptor->wHubCharacteristics);
+ if (hub_is_superspeed(hdev)) {
+ unit_load = 150;
+ full_load = 900;
+ } else {
+ unit_load = 100;
+ full_load = 500;
+ }
/* FIXME for USB 3.0, skip for now */
if ((wHubCharacteristics & HUB_CHAR_COMPOUND) &&
goto fail;
}
le16_to_cpus(&hubstatus);
+ hcd = bus_to_hcd(hdev->bus);
if (hdev == hdev->bus->root_hub) {
- if (hdev->bus_mA == 0 || hdev->bus_mA >= 500)
- hub->mA_per_port = 500;
+ if (hcd->power_budget > 0)
+ hdev->bus_mA = hcd->power_budget;
+ else
+ hdev->bus_mA = full_load * hdev->maxchild;
+ if (hdev->bus_mA >= full_load)
+ hub->mA_per_port = full_load;
else {
hub->mA_per_port = hdev->bus_mA;
hub->limited_power = 1;
}
} else if ((hubstatus & (1 << USB_DEVICE_SELF_POWERED)) == 0) {
+ int remaining = hdev->bus_mA -
+ hub->descriptor->bHubContrCurrent;
+
dev_dbg(hub_dev, "hub controller current requirement: %dmA\n",
hub->descriptor->bHubContrCurrent);
hub->limited_power = 1;
- if (hdev->maxchild > 0) {
- int remaining = hdev->bus_mA -
- hub->descriptor->bHubContrCurrent;
- if (remaining < hdev->maxchild * 100)
- dev_warn(hub_dev,
+ if (remaining < hdev->maxchild * unit_load)
+ dev_warn(hub_dev,
"insufficient power available "
"to use all downstream ports\n");
- hub->mA_per_port = 100; /* 7.2.1.1 */
- }
+ hub->mA_per_port = unit_load; /* 7.2.1 */
+
} else { /* Self-powered external hub */
/* FIXME: What about battery-powered external hubs that
* provide less current per port? */
- hub->mA_per_port = 500;
+ hub->mA_per_port = full_load;
}
- if (hub->mA_per_port < 500)
+ if (hub->mA_per_port < full_load)
dev_dbg(hub_dev, "%umA bus power budget for each child\n",
hub->mA_per_port);
/* Update the HCD's internal representation of this hub before khubd
* starts getting port status changes for devices under the hub.
*/
- hcd = bus_to_hcd(hdev->bus);
if (hcd->driver->update_hub_device) {
ret = hcd->driver->update_hub_device(hcd, hdev,
&hub->tt, GFP_KERNEL);
return ret;
/* The port state is unknown until the reset completes. */
- if ((portstatus & USB_PORT_STAT_RESET))
- goto delay;
-
- /*
- * Some buggy devices require a warm reset to be issued even
- * when the port appears not to be connected.
- */
- if (!warm) {
- /*
- * Some buggy devices can cause an NEC host controller
- * to transition to the "Error" state after a hot port
- * reset. This will show up as the port state in
- * "Inactive", and the port may also report a
- * disconnect. Forcing a warm port reset seems to make
- * the device work.
- *
- * See https://bugzilla.kernel.org/show_bug.cgi?id=41752
- */
- if (hub_port_warm_reset_required(hub, portstatus)) {
- int ret;
-
- if ((portchange & USB_PORT_STAT_C_CONNECTION))
- clear_port_feature(hub->hdev, port1,
- USB_PORT_FEAT_C_CONNECTION);
- if (portchange & USB_PORT_STAT_C_LINK_STATE)
- clear_port_feature(hub->hdev, port1,
- USB_PORT_FEAT_C_PORT_LINK_STATE);
- if (portchange & USB_PORT_STAT_C_RESET)
- clear_port_feature(hub->hdev, port1,
- USB_PORT_FEAT_C_RESET);
- dev_dbg(hub->intfdev, "hot reset failed, warm reset port %d\n",
- port1);
- ret = hub_port_reset(hub, port1,
- udev, HUB_BH_RESET_TIME,
- true);
- if ((portchange & USB_PORT_STAT_C_CONNECTION))
- clear_port_feature(hub->hdev, port1,
- USB_PORT_FEAT_C_CONNECTION);
- return ret;
- }
- /* Device went away? */
- if (!(portstatus & USB_PORT_STAT_CONNECTION))
- return -ENOTCONN;
-
- /* bomb out completely if the connection bounced */
- if ((portchange & USB_PORT_STAT_C_CONNECTION))
- return -ENOTCONN;
-
- if ((portstatus & USB_PORT_STAT_ENABLE)) {
- if (hub_is_wusb(hub))
- udev->speed = USB_SPEED_WIRELESS;
- else if (hub_is_superspeed(hub->hdev))
- udev->speed = USB_SPEED_SUPER;
- else if (portstatus & USB_PORT_STAT_HIGH_SPEED)
- udev->speed = USB_SPEED_HIGH;
- else if (portstatus & USB_PORT_STAT_LOW_SPEED)
- udev->speed = USB_SPEED_LOW;
- else
- udev->speed = USB_SPEED_FULL;
- return 0;
- }
- } else {
- if (!(portstatus & USB_PORT_STAT_CONNECTION) ||
- hub_port_warm_reset_required(hub,
- portstatus))
- return -ENOTCONN;
-
- return 0;
- }
+ if (!(portstatus & USB_PORT_STAT_RESET))
+ break;
-delay:
/* switch to the long delay after two short delay failures */
if (delay_time >= 2 * HUB_SHORT_RESET_TIME)
delay = HUB_LONG_RESET_TIME;
port1, warm ? "warm " : "", delay);
}
- return -EBUSY;
+ if ((portstatus & USB_PORT_STAT_RESET))
+ return -EBUSY;
+
+ if (hub_port_warm_reset_required(hub, portstatus))
+ return -ENOTCONN;
+
+ /* Device went away? */
+ if (!(portstatus & USB_PORT_STAT_CONNECTION))
+ return -ENOTCONN;
+
+ /* bomb out completely if the connection bounced. A USB 3.0
+ * connection may bounce if multiple warm resets were issued,
+ * but the device may have successfully re-connected. Ignore it.
+ */
+ if (!hub_is_superspeed(hub->hdev) &&
+ (portchange & USB_PORT_STAT_C_CONNECTION))
+ return -ENOTCONN;
+
+ if (!(portstatus & USB_PORT_STAT_ENABLE))
+ return -EBUSY;
+
+ if (!udev)
+ return 0;
+
+ if (hub_is_wusb(hub))
+ udev->speed = USB_SPEED_WIRELESS;
+ else if (hub_is_superspeed(hub->hdev))
+ udev->speed = USB_SPEED_SUPER;
+ else if (portstatus & USB_PORT_STAT_HIGH_SPEED)
+ udev->speed = USB_SPEED_HIGH;
+ else if (portstatus & USB_PORT_STAT_LOW_SPEED)
+ udev->speed = USB_SPEED_LOW;
+ else
+ udev->speed = USB_SPEED_FULL;
+ return 0;
}
static void hub_port_finish_reset(struct usb_hub *hub, int port1,
- struct usb_device *udev, int *status, bool warm)
+ struct usb_device *udev, int *status)
{
switch (*status) {
case 0:
- if (!warm) {
- struct usb_hcd *hcd;
- /* TRSTRCY = 10 ms; plus some extra */
- msleep(10 + 40);
+ /* TRSTRCY = 10 ms; plus some extra */
+ msleep(10 + 40);
+ if (udev) {
+ struct usb_hcd *hcd = bus_to_hcd(udev->bus);
+
update_devnum(udev, 0);
- hcd = bus_to_hcd(udev->bus);
/* The xHC may think the device is already reset,
* so ignore the status.
*/
case -ENODEV:
clear_port_feature(hub->hdev,
port1, USB_PORT_FEAT_C_RESET);
- /* FIXME need disconnect() for NOTATTACHED device */
if (hub_is_superspeed(hub->hdev)) {
clear_port_feature(hub->hdev, port1,
USB_PORT_FEAT_C_BH_PORT_RESET);
clear_port_feature(hub->hdev, port1,
USB_PORT_FEAT_C_PORT_LINK_STATE);
+ clear_port_feature(hub->hdev, port1,
+ USB_PORT_FEAT_C_CONNECTION);
}
- if (!warm)
+ if (udev)
usb_set_device_state(udev, *status
? USB_STATE_NOTATTACHED
: USB_STATE_DEFAULT);
struct usb_device *udev, unsigned int delay, bool warm)
{
int i, status;
+ u16 portchange, portstatus;
- if (!warm) {
- /* Block EHCI CF initialization during the port reset.
- * Some companion controllers don't like it when they mix.
- */
- down_read(&ehci_cf_port_reset_rwsem);
- } else {
- if (!hub_is_superspeed(hub->hdev)) {
+ if (!hub_is_superspeed(hub->hdev)) {
+ if (warm) {
dev_err(hub->intfdev, "only USB3 hub support "
"warm reset\n");
return -EINVAL;
}
+ /* Block EHCI CF initialization during the port reset.
+ * Some companion controllers don't like it when they mix.
+ */
+ down_read(&ehci_cf_port_reset_rwsem);
+ } else if (!warm) {
+ /*
+ * If the caller hasn't explicitly requested a warm reset,
+ * double check and see if one is needed.
+ */
+ status = hub_port_status(hub, port1,
+ &portstatus, &portchange);
+ if (status < 0)
+ goto done;
+
+ if (hub_port_warm_reset_required(hub, portstatus))
+ warm = true;
}
/* Reset the port */
status);
}
- /* return on disconnect or reset */
+ /* Check for disconnect or reset */
if (status == 0 || status == -ENOTCONN || status == -ENODEV) {
- hub_port_finish_reset(hub, port1, udev, &status, warm);
- goto done;
+ hub_port_finish_reset(hub, port1, udev, &status);
+
+ if (!hub_is_superspeed(hub->hdev))
+ goto done;
+
+ /*
+ * If a USB 3.0 device migrates from reset to an error
+ * state, re-issue the warm reset.
+ */
+ if (hub_port_status(hub, port1,
+ &portstatus, &portchange) < 0)
+ goto done;
+
+ if (!hub_port_warm_reset_required(hub, portstatus))
+ goto done;
+
+ /*
+ * If the port is in SS.Inactive or Compliance Mode, the
+ * hot or warm reset failed. Try another warm reset.
+ */
+ if (!warm) {
+ dev_dbg(hub->intfdev, "hot reset failed, warm reset port %d\n",
+ port1);
+ warm = true;
+ }
}
dev_dbg (hub->intfdev,
port1);
done:
- if (!warm)
+ if (!hub_is_superspeed(hub->hdev))
up_read(&ehci_cf_port_reset_rwsem);
return status;
/* see 7.1.7.6 */
if (hub_is_superspeed(hub->hdev))
- status = set_port_feature(hub->hdev,
- port1 | (USB_SS_PORT_LS_U3 << 3),
- USB_PORT_FEAT_LINK_STATE);
+ status = hub_set_port_link_state(hub, port1, USB_SS_PORT_LS_U3);
else
status = set_port_feature(hub->hdev, port1,
USB_PORT_FEAT_SUSPEND);
/* see 7.1.7.7; affects power usage, but not budgeting */
if (hub_is_superspeed(hub->hdev))
- status = set_port_feature(hub->hdev,
- port1 | (USB_SS_PORT_LS_U0 << 3),
- USB_PORT_FEAT_LINK_STATE);
+ status = hub_set_port_link_state(hub, port1, USB_SS_PORT_LS_U0);
else
status = clear_port_feature(hub->hdev,
port1, USB_PORT_FEAT_SUSPEND);
for (port1 = 1; port1 <= hdev->maxchild; ++port1) {
struct usb_device *udev = hub->ports[port1 - 1]->child;
int delta;
+ unsigned unit_load;
if (!udev)
continue;
+ if (hub_is_superspeed(udev))
+ unit_load = 150;
+ else
+ unit_load = 100;
- /* Unconfigured devices may not use more than 100mA,
- * or 8mA for OTG ports */
+ /*
+ * Unconfigured devices may not use more than one unit load,
+ * or 8mA for OTG ports
+ */
if (udev->actconfig)
- delta = udev->actconfig->desc.bMaxPower * 2;
+ delta = usb_get_max_power(udev, udev->actconfig);
else if (port1 != udev->bus->otg_port || hdev->parent)
- delta = 100;
+ delta = unit_load;
else
delta = 8;
if (delta > hub->mA_per_port)
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",
goto done;
return;
}
+ if (hub_is_superspeed(hub->hdev))
+ unit_load = 150;
+ else
+ unit_load = 100;
for (i = 0; i < SET_CONFIG_TRIES; i++) {
* on the parent.
*/
if (udev->descriptor.bDeviceClass == USB_CLASS_HUB
- && udev->bus_mA <= 100) {
+ && udev->bus_mA <= unit_load) {
u16 devstat;
status = usb_get_status(udev, USB_RECIP_DEVICE, 0,
*/
if (hub_port_warm_reset_required(hub, portstatus)) {
int status;
+ struct usb_device *udev =
+ hub->ports[i - 1]->child;
dev_dbg(hub_dev, "warm reset port %d\n", i);
- status = hub_port_reset(hub, i, NULL,
- HUB_BH_RESET_TIME, true);
- if (status < 0)
- hub_port_disable(hub, i, 1);
+ if (!udev) {
+ 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;
}
projects / platform / adaptation / renesas_rcar / renesas_kernel.git / blobdiff