diff options
| -rw-r--r-- | drivers/usb/core/hub.c | 31 | ||||
| -rw-r--r-- | drivers/usb/core/usb-acpi.c | 80 | ||||
| -rw-r--r-- | drivers/usb/core/usb.h | 4 | ||||
| -rw-r--r-- | include/linux/usb.h | 7 |
4 files changed, 87 insertions, 35 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 3341b55f495..4ffe8371ada 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -43,6 +43,7 @@ struct usb_port { struct usb_device *child; struct device dev; struct dev_state *port_owner; + enum usb_port_connect_type connect_type; }; struct usb_hub { @@ -5078,6 +5079,36 @@ struct usb_device *usb_hub_find_child(struct usb_device *hdev, } 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 = hdev_to_hub(hdev); + + 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 connect type of the port and if input params are + * invalid, return USB_PORT_CONNECT_TYPE_UNKNOWN. + */ +enum usb_port_connect_type +usb_get_hub_port_connect_type(struct usb_device *hdev, int port1) +{ + struct usb_hub *hub = hdev_to_hub(hdev); + + return hub->ports[port1 - 1]->connect_type; +} + #ifdef CONFIG_ACPI /** * usb_get_hub_port_acpi_handle - Get the usb port's acpi handle diff --git a/drivers/usb/core/usb-acpi.c b/drivers/usb/core/usb-acpi.c index 47197bf0b28..404d86afb24 100644 --- a/drivers/usb/core/usb-acpi.c +++ b/drivers/usb/core/usb-acpi.c @@ -19,20 +19,29 @@ #include "usb.h" -static int usb_acpi_check_upc(struct usb_device *udev, acpi_handle handle) +static int usb_acpi_check_port_connect_type(struct usb_device *hdev, + acpi_handle handle, int port1) { acpi_status status; struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; union acpi_object *upc; + struct acpi_pld pld; int ret = 0; - status = acpi_evaluate_object(handle, "_UPC", NULL, &buffer); - + /* + * Accoding to ACPI Spec 9.13. PLD indicates whether usb port is + * user visible and _UPC indicates whether it is connectable. If + * the port was visible and connectable, it could be freely connected + * and disconnected with USB devices. If no visible and connectable, + * a usb device is directly hard-wired to the port. If no visible and + * no connectable, the port would be not used. + */ + status = acpi_get_physical_device_location(handle, &pld); if (ACPI_FAILURE(status)) return -ENODEV; + status = acpi_evaluate_object(handle, "_UPC", NULL, &buffer); upc = buffer.pointer; - if (!upc || (upc->type != ACPI_TYPE_PACKAGE) || upc->package.count != 4) { ret = -EINVAL; @@ -40,33 +49,20 @@ static int usb_acpi_check_upc(struct usb_device *udev, acpi_handle handle) } if (upc->package.elements[0].integer.value) - udev->removable = USB_DEVICE_REMOVABLE; - else - udev->removable = USB_DEVICE_FIXED; + if (pld.user_visible) + usb_set_hub_port_connect_type(hdev, port1, + USB_PORT_CONNECT_TYPE_HOT_PLUG); + else + usb_set_hub_port_connect_type(hdev, port1, + USB_PORT_CONNECT_TYPE_HARD_WIRED); + else if (!pld.user_visible) + usb_set_hub_port_connect_type(hdev, port1, USB_PORT_NOT_USED); out: kfree(upc); return ret; } -static int usb_acpi_check_pld(struct usb_device *udev, acpi_handle handle) -{ - acpi_status status; - struct acpi_pld pld; - - status = acpi_get_physical_device_location(handle, &pld); - - if (ACPI_FAILURE(status)) - return -ENODEV; - - if (pld.user_visible) - udev->removable = USB_DEVICE_REMOVABLE; - else - udev->removable = USB_DEVICE_FIXED; - - return 0; -} - static int usb_acpi_find_device(struct device *dev, acpi_handle *handle) { struct usb_device *udev; @@ -88,8 +84,30 @@ static int usb_acpi_find_device(struct device *dev, acpi_handle *handle) */ if (is_usb_device(dev)) { udev = to_usb_device(dev); - if (udev->parent) + if (udev->parent) { + enum usb_port_connect_type type; + + /* + * According usb port's connect type to set usb device's + * removability. + */ + type = usb_get_hub_port_connect_type(udev->parent, + udev->portnum); + switch (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: + udev->removable = USB_DEVICE_REMOVABLE_UNKNOWN; + break; + } + return -ENODEV; + } + /* root hub's parent is the usb hcd. */ parent_handle = DEVICE_ACPI_HANDLE(dev->parent); *handle = acpi_get_child(parent_handle, udev->portnum); @@ -122,18 +140,10 @@ static int usb_acpi_find_device(struct device *dev, acpi_handle *handle) if (!*handle) return -ENODEV; } + usb_acpi_check_port_connect_type(udev, *handle, port_num); } else return -ENODEV; - /* - * PLD will tell us whether a port is removable to the user or - * not. If we don't get an answer from PLD (it's not present - * or it's malformed) then try to infer it from UPC. If a - * device isn't connectable then it's probably not removable. - */ - if (usb_acpi_check_pld(udev, *handle) != 0) - usb_acpi_check_upc(udev, *handle); - return 0; } diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h index 1633f6e99e3..1c528c1bf0b 100644 --- a/drivers/usb/core/usb.h +++ b/drivers/usb/core/usb.h @@ -169,6 +169,10 @@ extern void usb_notify_add_device(struct usb_device *udev); extern void usb_notify_remove_device(struct usb_device *udev); extern void usb_notify_add_bus(struct usb_bus *ubus); extern void usb_notify_remove_bus(struct usb_bus *ubus); +extern enum usb_port_connect_type + usb_get_hub_port_connect_type(struct usb_device *hdev, int port1); +extern void usb_set_hub_port_connect_type(struct usb_device *hdev, int port1, + enum usb_port_connect_type type); #ifdef CONFIG_ACPI extern int usb_acpi_register(void); diff --git a/include/linux/usb.h b/include/linux/usb.h index ff8ef2d2858..e0084a1fa37 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -384,6 +384,13 @@ enum usb_device_removable { USB_DEVICE_FIXED, }; +enum usb_port_connect_type { + USB_PORT_CONNECT_TYPE_UNKNOWN = 0, + USB_PORT_CONNECT_TYPE_HOT_PLUG, + USB_PORT_CONNECT_TYPE_HARD_WIRED, + USB_PORT_NOT_USED, +}; + /* * USB 3.0 Link Power Management (LPM) parameters. * |