diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/core/hcd.c | 1 | ||||
| -rw-r--r-- | drivers/usb/core/hub.c | 57 |
2 files changed, 41 insertions, 17 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 4225d5e72131..5f6da8b2d6a1 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -2506,7 +2506,6 @@ int usb_add_hcd(struct usb_hcd *hcd, } /* starting here, usbcore will pay attention to this root hub */ - rhdev->bus_mA = min(500u, hcd->power_budget); if ((retval = register_root_hub(hcd)) != 0) goto err_register_root_hub; diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 12913306840a..0ef512aa2898 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -1351,6 +1351,8 @@ static int hub_configure(struct usb_hub *hub, 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) { @@ -1397,6 +1399,13 @@ static int hub_configure(struct usb_hub *hub, } 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) && @@ -1516,40 +1525,44 @@ static int hub_configure(struct usb_hub *hub, 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); @@ -4204,16 +4217,23 @@ hub_power_remaining (struct usb_hub *hub) 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 = 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) @@ -4248,6 +4268,7 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1, 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", @@ -4337,6 +4358,10 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1, goto done; return; } + if (hub_is_superspeed(hub->hdev)) + unit_load = 150; + else + unit_load = 100; for (i = 0; i < SET_CONFIG_TRIES; i++) { @@ -4384,7 +4409,7 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1, * 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, |