Change since v7: update Documentation/ABI and fix dev_err() show pattern
Change since v4: remove struct usb_port->udev member since it is not used.
This patch is to make usb port a real device under usb hub interface.
Move port_owner to struct usb_port.
Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Lan Tianyu <tianyu.lan@xxxxxxxxx>
---
Documentation/ABI/testing/sysfs-bus-usb | 7 +++
drivers/usb/core/hub.c | 91 +++++++++++++++++++++++++------
2 files changed, 82 insertions(+), 16 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb
index 6df4e6f..d5bb5be 100644
--- a/Documentation/ABI/testing/sysfs-bus-usb
+++ b/Documentation/ABI/testing/sysfs-bus-usb
@@ -208,3 +208,10 @@ Description:
such as ACPI. This file will read either "removable" or
"fixed" if the information is available, and "unknown"
otherwise.
+
+What: /sys/bus/usb/devices/.../(hub interface)/portX
+Date: July 2012
+Contact: Lan Tianyu <tianyu.lan@xxxxxxxxx>
+Description:
+ The /sys/bus/usb/devices/.../(hub interface)/portX
+ is usb port device's sysfs directory.
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 4cc8dc9..a59e509 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -37,6 +37,11 @@
#endif
#endif
+struct usb_port {
+ struct device dev;
+ struct dev_state *port_owner;
+};
+
struct usb_hub {
struct device *intfdev; /* the "interface" device */
struct usb_device *hdev;
@@ -81,7 +86,11 @@ struct usb_hub {
u8 indicator[USB_MAXCHILDREN];
struct delayed_work leds;
struct delayed_work init_work;
- struct dev_state **port_owners;
+ struct usb_port **ports;
+};
+
+struct device_type usb_port_device_type = {
+ .name = "usb_port",
};
static inline int hub_is_superspeed(struct usb_device *hdev)
@@ -154,6 +163,8 @@ EXPORT_SYMBOL_GPL(ehci_cf_port_reset_rwsem);
#define HUB_DEBOUNCE_STEP 25
#define HUB_DEBOUNCE_STABLE 100
+#define to_usb_port(_dev) \
+ container_of(_dev, struct usb_port, dev)
static int usb_reset_and_verify_device(struct usb_device *udev);
@@ -1220,6 +1231,48 @@ static int hub_post_reset(struct usb_interface *intf)
return 0;
}
+static void usb_port_device_release(struct device *dev)
+{
+ struct usb_port *port_dev = to_usb_port(dev);
+
+ kfree(port_dev);
+}
+
+static void usb_hub_remove_port_device(struct usb_hub *hub,
+ int port1)
+{
+ device_unregister(&hub->ports[port1 - 1]->dev);
+}
+
+static int usb_hub_create_port_device(struct usb_hub *hub,
+ int port1)
+{
+ struct usb_port *port_dev = NULL;
+ int retval;
+
+ port_dev = kzalloc(sizeof(*port_dev), GFP_KERNEL);
+ if (!port_dev) {
+ retval = -ENOMEM;
+ goto exit;
+ }
+
+ hub->ports[port1 - 1] = port_dev;
+ port_dev->dev.parent = hub->intfdev;
+ port_dev->dev.type = &usb_port_device_type;
+ port_dev->dev.release = usb_port_device_release;
+ dev_set_name(&port_dev->dev, "port%d", port1);
+
+ retval = device_register(&port_dev->dev);
+ if (retval)
+ goto error_register;
+ return 0;
+
+error_register:
+ put_device(&port_dev->dev);
+exit:
+ return retval;
+}
+
static int hub_configure(struct usb_hub *hub,
struct usb_endpoint_descriptor *endpoint)
{
@@ -1229,7 +1282,7 @@ static int hub_configure(struct usb_hub *hub,
u16 hubstatus, hubchange;
u16 wHubCharacteristics;
unsigned int pipe;
- int maxp, ret;
+ int maxp, ret, i;
char *message = "out of memory";
hub->buffer = kmalloc(sizeof(*hub->buffer), GFP_KERNEL);
@@ -1271,9 +1324,9 @@ static int hub_configure(struct usb_hub *hub,
hdev->children = kzalloc(hdev->maxchild *
sizeof(struct usb_device *), GFP_KERNEL);
- hub->port_owners = kzalloc(hdev->maxchild * sizeof(struct dev_state *),
- GFP_KERNEL);
- if (!hdev->children || !hub->port_owners) {
+ hub->ports = kzalloc(hdev->maxchild * sizeof(struct usb_port *),
+ GFP_KERNEL);
+ if (!hdev->children || !hub->ports) {
ret = -ENOMEM;
goto fail;
}
@@ -1482,6 +1535,11 @@ static int hub_configure(struct usb_hub *hub,
if (hub->has_indicators && blinkenlights)
hub->indicator [0] = INDICATOR_CYCLE;
+ for (i = 0; i < hdev->maxchild; i++)
+ if (usb_hub_create_port_device(hub, i + 1) < 0)
+ dev_err(hub->intfdev,
+ "couldn't create port%d device.\n", i + 1);
+
hub_activate(hub, HUB_INIT);
return 0;
@@ -1506,6 +1564,10 @@ static void hub_disconnect(struct usb_interface *intf)
{
struct usb_hub *hub = usb_get_intfdata(intf);
struct usb_device *hdev = interface_to_usbdev(intf);
+ int i;
+
+ for (i = 0; i < hdev->maxchild; i++)
+ usb_hub_remove_port_device(hub, i + 1);
/* Take the hub off the event list and don't let it be added again */
spin_lock_irq(&hub_event_lock);
@@ -1528,7 +1590,7 @@ static void hub_disconnect(struct usb_interface *intf)
usb_free_urb(hub->urb);
kfree(hdev->children);
- kfree(hub->port_owners);
+ kfree(hub->ports);
kfree(hub->descriptor);
kfree(hub->status);
kfree(hub->buffer);
@@ -1660,7 +1722,7 @@ static int find_port_owner(struct usb_device *hdev, unsigned port1,
/* This assumes that devices not managed by the hub driver
* will always have maxchild equal to 0.
*/
- *ppowner = &(hdev_to_hub(hdev)->port_owners[port1 - 1]);
+ *ppowner = &(hdev_to_hub(hdev)->ports[port1 - 1]->port_owner);
return 0;
}
@@ -1697,16 +1759,14 @@ int usb_hub_release_port(struct usb_device *hdev, unsigned port1,
void usb_hub_release_all_ports(struct usb_device *hdev, struct dev_state *owner)
{
+ struct usb_hub *hub = hdev_to_hub(hdev);
int n;
- struct dev_state **powner;
- n = find_port_owner(hdev, 1, &powner);
- if (n == 0) {
- for (; n < hdev->maxchild; (++n, ++powner)) {
- if (*powner == owner)
- *powner = NULL;
- }
+ for (n = 0; n < hdev->maxchild; n++) {
+ if (hub->ports[n]->port_owner == owner)
+ hub->ports[n]->port_owner = NULL;
}
+
}
/* The caller must hold udev's lock */
@@ -1717,10 +1777,9 @@ bool usb_device_is_owned(struct usb_device *udev)
if (udev->state == USB_STATE_NOTATTACHED || !udev->parent)
return false;
hub = hdev_to_hub(udev->parent);
- return !!hub->port_owners[udev->portnum - 1];
+ return !!hub->ports[udev->portnum - 1]->port_owner;
}
-
static void recursively_mark_NOTATTACHED(struct usb_device *udev)
{
int i;
--
1.7.6.rc2.8.g28eb
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