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-rw-r--r--drivers/usb/core/Kconfig2
-rw-r--r--drivers/usb/core/config.c2
-rw-r--r--drivers/usb/core/devices.c7
-rw-r--r--drivers/usb/core/devio.c36
-rw-r--r--drivers/usb/core/driver.c15
-rw-r--r--drivers/usb/core/endpoint.c10
-rw-r--r--drivers/usb/core/hcd.c6
-rw-r--r--drivers/usb/core/hub.c257
-rw-r--r--drivers/usb/core/message.c2
-rw-r--r--drivers/usb/core/quirks.c2
-rw-r--r--drivers/usb/core/sysfs.c12
-rw-r--r--drivers/usb/core/usb-acpi.c206
-rw-r--r--drivers/usb/core/usb.h13
13 files changed, 437 insertions, 133 deletions
diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig
index 9981984b365b..f70c1a1694ad 100644
--- a/drivers/usb/core/Kconfig
+++ b/drivers/usb/core/Kconfig
@@ -56,7 +56,7 @@ config USB_SUSPEND
config USB_OTG
bool "OTG support"
- depends on USB && EXPERIMENTAL
+ depends on USB
depends on USB_SUSPEND
default n
help
diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c
index f4bdd0ce8d56..7199adccf444 100644
--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -702,6 +702,8 @@ int usb_get_configuration(struct usb_device *dev)
if (result < 0) {
dev_err(ddev, "unable to read config index %d "
"descriptor/%s: %d\n", cfgno, "start", result);
+ if (result != -EPIPE)
+ goto err;
dev_err(ddev, "chopping to %d config(s)\n", cfgno);
dev->descriptor.bNumConfigurations = cfgno;
break;
diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c
index 3440812b4a84..f460de31acee 100644
--- a/drivers/usb/core/devices.c
+++ b/drivers/usb/core/devices.c
@@ -496,6 +496,7 @@ static ssize_t usb_device_dump(char __user **buffer, size_t *nbytes,
char *pages_start, *data_end, *speed;
unsigned int length;
ssize_t total_written = 0;
+ struct usb_device *childdev = NULL;
/* don't bother with anything else if we're not writing any data */
if (*nbytes <= 0)
@@ -589,14 +590,12 @@ static ssize_t usb_device_dump(char __user **buffer, size_t *nbytes,
free_pages((unsigned long)pages_start, 1);
/* Now look at all of this device's children. */
- for (chix = 0; chix < usbdev->maxchild; chix++) {
- struct usb_device *childdev = usbdev->children[chix];
-
+ usb_hub_for_each_child(usbdev, chix, childdev) {
if (childdev) {
usb_lock_device(childdev);
ret = usb_device_dump(buffer, nbytes, skip_bytes,
file_offset, childdev, bus,
- level + 1, chix, ++cnt);
+ level + 1, chix - 1, ++cnt);
usb_unlock_device(childdev);
if (ret == -EFAULT)
return total_written;
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index ebb8a9de8b5f..b78fbe222b72 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -1348,6 +1348,7 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
ret = -EFAULT;
goto error;
}
+ uurb->buffer += u;
}
totlen -= u;
}
@@ -1928,6 +1929,38 @@ static int proc_get_capabilities(struct dev_state *ps, void __user *arg)
return 0;
}
+static int proc_disconnect_claim(struct dev_state *ps, void __user *arg)
+{
+ struct usbdevfs_disconnect_claim dc;
+ struct usb_interface *intf;
+
+ if (copy_from_user(&dc, arg, sizeof(dc)))
+ return -EFAULT;
+
+ intf = usb_ifnum_to_if(ps->dev, dc.interface);
+ if (!intf)
+ return -EINVAL;
+
+ if (intf->dev.driver) {
+ struct usb_driver *driver = to_usb_driver(intf->dev.driver);
+
+ if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_IF_DRIVER) &&
+ strncmp(dc.driver, intf->dev.driver->name,
+ sizeof(dc.driver)) != 0)
+ return -EBUSY;
+
+ if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_EXCEPT_DRIVER) &&
+ strncmp(dc.driver, intf->dev.driver->name,
+ sizeof(dc.driver)) == 0)
+ return -EBUSY;
+
+ dev_dbg(&intf->dev, "disconnect by usbfs\n");
+ usb_driver_release_interface(driver, intf);
+ }
+
+ return claimintf(ps, dc.interface);
+}
+
/*
* NOTE: All requests here that have interface numbers as parameters
* are assuming that somehow the configuration has been prevented from
@@ -2101,6 +2134,9 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
case USBDEVFS_GET_CAPABILITIES:
ret = proc_get_capabilities(ps, p);
break;
+ case USBDEVFS_DISCONNECT_CLAIM:
+ ret = proc_disconnect_claim(ps, p);
+ break;
}
usb_unlock_device(dev);
if (ret >= 0)
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 445455a4429b..6056db7af410 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -125,10 +125,9 @@ store_remove_id(struct device_driver *driver, const char *buf, size_t count)
{
struct usb_dynid *dynid, *n;
struct usb_driver *usb_driver = to_usb_driver(driver);
- u32 idVendor = 0;
- u32 idProduct = 0;
- int fields = 0;
- int retval = 0;
+ u32 idVendor;
+ u32 idProduct;
+ int fields;
fields = sscanf(buf, "%x %x", &idVendor, &idProduct);
if (fields < 2)
@@ -141,14 +140,10 @@ store_remove_id(struct device_driver *driver, const char *buf, size_t count)
(id->idProduct == idProduct)) {
list_del(&dynid->node);
kfree(dynid);
- retval = 0;
break;
}
}
spin_unlock(&usb_driver->dynids.lock);
-
- if (retval)
- return retval;
return count;
}
static DRIVER_ATTR(remove_id, S_IRUGO | S_IWUSR, show_dynids, store_remove_id);
@@ -372,6 +367,10 @@ static int usb_probe_interface(struct device *dev)
intf->condition = USB_INTERFACE_UNBOUND;
usb_cancel_queued_reset(intf);
+ /* If the LPM disable succeeded, balance the ref counts. */
+ if (!lpm_disable_error)
+ usb_unlocked_enable_lpm(udev);
+
/* Unbound interfaces are always runtime-PM-disabled and -suspended */
if (driver->supports_autosuspend)
pm_runtime_disable(dev);
diff --git a/drivers/usb/core/endpoint.c b/drivers/usb/core/endpoint.c
index db7fe50c23d4..68cc6532e749 100644
--- a/drivers/usb/core/endpoint.c
+++ b/drivers/usb/core/endpoint.c
@@ -24,10 +24,6 @@ struct ep_device {
#define to_ep_device(_dev) \
container_of(_dev, struct ep_device, dev)
-struct device_type usb_ep_device_type = {
- .name = "usb_endpoint",
-};
-
struct ep_attribute {
struct attribute attr;
ssize_t (*show)(struct usb_device *,
@@ -172,6 +168,11 @@ static void ep_device_release(struct device *dev)
kfree(ep_dev);
}
+struct device_type usb_ep_device_type = {
+ .name = "usb_endpoint",
+ .release = ep_device_release,
+};
+
int usb_create_ep_devs(struct device *parent,
struct usb_host_endpoint *endpoint,
struct usb_device *udev)
@@ -190,7 +191,6 @@ int usb_create_ep_devs(struct device *parent,
ep_dev->dev.groups = ep_dev_groups;
ep_dev->dev.type = &usb_ep_device_type;
ep_dev->dev.parent = parent;
- ep_dev->dev.release = ep_device_release;
dev_set_name(&ep_dev->dev, "ep_%02x", endpoint->desc.bEndpointAddress);
retval = device_register(&ep_dev->dev);
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 75ba2091f9b4..f034716190ff 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -22,6 +22,7 @@
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#include <linux/bcd.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/kernel.h>
@@ -123,9 +124,8 @@ static inline int is_root_hub(struct usb_device *udev)
*/
/*-------------------------------------------------------------------------*/
-
-#define KERNEL_REL ((LINUX_VERSION_CODE >> 16) & 0x0ff)
-#define KERNEL_VER ((LINUX_VERSION_CODE >> 8) & 0x0ff)
+#define KERNEL_REL bin2bcd(((LINUX_VERSION_CODE >> 16) & 0x0ff))
+#define KERNEL_VER bin2bcd(((LINUX_VERSION_CODE >> 8) & 0x0ff))
/* usb 3.0 root hub device descriptor */
static const u8 usb3_rh_dev_descriptor[18] = {
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 128a804c42f4..1af04bdeaf0c 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -39,6 +39,13 @@
#endif
#endif
+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 {
struct device *intfdev; /* the "interface" device */
struct usb_device *hdev;
@@ -83,7 +90,7 @@ 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;
};
static inline int hub_is_superspeed(struct usb_device *hdev)
@@ -156,6 +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);
@@ -174,7 +183,7 @@ static inline char *portspeed(struct usb_hub *hub, int portstatus)
/* Note that hdev or one of its children must be locked! */
static struct usb_hub *hdev_to_hub(struct usb_device *hdev)
{
- if (!hdev || !hdev->actconfig)
+ if (!hdev || !hdev->actconfig || !hdev->maxchild)
return NULL;
return usb_get_intfdata(hdev->actconfig->interface[0]);
}
@@ -730,13 +739,16 @@ static void hub_tt_work(struct work_struct *work)
int limit = 100;
spin_lock_irqsave (&hub->tt.lock, flags);
- while (--limit && !list_empty (&hub->tt.clear_list)) {
+ while (!list_empty(&hub->tt.clear_list)) {
struct list_head *next;
struct usb_tt_clear *clear;
struct usb_device *hdev = hub->hdev;
const struct hc_driver *drv;
int status;
+ if (!hub->quiescing && --limit < 0)
+ break;
+
next = hub->tt.clear_list.next;
clear = list_entry (next, struct usb_tt_clear, clear_list);
list_del (&clear->clear_list);
@@ -869,8 +881,8 @@ static int hub_port_disable(struct usb_hub *hub, int port1, int set_state)
struct usb_device *hdev = hub->hdev;
int ret = 0;
- if (hdev->children[port1-1] && set_state)
- usb_set_device_state(hdev->children[port1-1],
+ if (hub->ports[port1 - 1]->child && set_state)
+ usb_set_device_state(hub->ports[port1 - 1]->child,
USB_STATE_NOTATTACHED);
if (!hub->error && !hub_is_superspeed(hub->hdev))
ret = clear_port_feature(hdev, port1, USB_PORT_FEAT_ENABLE);
@@ -1026,7 +1038,7 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
* which ports need attention.
*/
for (port1 = 1; port1 <= hdev->maxchild; ++port1) {
- struct usb_device *udev = hdev->children[port1-1];
+ struct usb_device *udev = hub->ports[port1 - 1]->child;
u16 portstatus, portchange;
portstatus = portchange = 0;
@@ -1191,8 +1203,8 @@ static void hub_quiesce(struct usb_hub *hub, enum hub_quiescing_type type)
if (type != HUB_SUSPEND) {
/* Disconnect all the children */
for (i = 0; i < hdev->maxchild; ++i) {
- if (hdev->children[i])
- usb_disconnect(&hdev->children[i]);
+ if (hub->ports[i]->child)
+ usb_disconnect(&hub->ports[i]->child);
}
}
@@ -1201,7 +1213,7 @@ static void hub_quiesce(struct usb_hub *hub, enum hub_quiescing_type type)
if (hub->has_indicators)
cancel_delayed_work_sync(&hub->leds);
if (hub->tt.hub)
- cancel_work_sync(&hub->tt.clear_work);
+ flush_work(&hub->tt.clear_work);
}
/* caller has locked the hub device */
@@ -1222,6 +1234,52 @@ 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);
+}
+
+struct device_type usb_port_device_type = {
+ .name = "usb_port",
+ .release = usb_port_device_release,
+};
+
+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;
+ 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)
{
@@ -1231,7 +1289,7 @@ 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);
@@ -1271,11 +1329,9 @@ static int hub_configure(struct usb_hub *hub,
dev_info (hub_dev, "%d port%s detected\n", hdev->maxchild,
(hdev->maxchild == 1) ? "" : "s");
- 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 (!hub->ports) {
ret = -ENOMEM;
goto fail;
}
@@ -1484,6 +1540,11 @@ 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;
@@ -1508,6 +1569,7 @@ 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;
/* Take the hub off the event list and don't let it be added again */
spin_lock_irq(&hub_event_lock);
@@ -1523,14 +1585,16 @@ static void hub_disconnect(struct usb_interface *intf)
hub_quiesce(hub, HUB_DISCONNECT);
usb_set_intfdata (intf, NULL);
+
+ for (i = 0; i < hdev->maxchild; i++)
+ usb_hub_remove_port_device(hub, i + 1);
hub->hdev->maxchild = 0;
if (hub->hdev->speed == USB_SPEED_HIGH)
highspeed_hubs--;
usb_free_urb(hub->urb);
- kfree(hdev->children);
- kfree(hub->port_owners);
+ kfree(hub->ports);
kfree(hub->descriptor);
kfree(hub->status);
kfree(hub->buffer);
@@ -1617,6 +1681,7 @@ static int
hub_ioctl(struct usb_interface *intf, unsigned int code, void *user_data)
{
struct usb_device *hdev = interface_to_usbdev (intf);
+ struct usb_hub *hub = hdev_to_hub(hdev);
/* assert ifno == 0 (part of hub spec) */
switch (code) {
@@ -1630,11 +1695,11 @@ hub_ioctl(struct usb_interface *intf, unsigned int code, void *user_data)
else {
info->nports = hdev->maxchild;
for (i = 0; i < info->nports; i++) {
- if (hdev->children[i] == NULL)
+ if (hub->ports[i]->child == NULL)
info->port[i] = 0;
else
info->port[i] =
- hdev->children[i]->devnum;
+ hub->ports[i]->child->devnum;
}
}
spin_unlock_irq(&device_state_lock);
@@ -1662,7 +1727,7 @@ 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;
}
@@ -1699,16 +1764,14 @@ 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 */
@@ -1719,17 +1782,17 @@ 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)
{
+ struct usb_hub *hub = hdev_to_hub(udev);
int i;
for (i = 0; i < udev->maxchild; ++i) {
- if (udev->children[i])
- recursively_mark_NOTATTACHED(udev->children[i]);
+ if (hub->ports[i]->child)
+ recursively_mark_NOTATTACHED(hub->ports[i]->child);
}
if (udev->state == USB_STATE_SUSPENDED)
udev->active_duration -= jiffies;
@@ -1893,6 +1956,7 @@ static void hub_free_dev(struct usb_device *udev)
void usb_disconnect(struct usb_device **pdev)
{
struct usb_device *udev = *pdev;
+ struct usb_hub *hub = hdev_to_hub(udev);
int i;
/* mark the device as inactive, so any further urb submissions for
@@ -1907,8 +1971,8 @@ void usb_disconnect(struct usb_device **pdev)
/* Free up all the children before we remove this device */
for (i = 0; i < udev->maxchild; i++) {
- if (udev->children[i])
- usb_disconnect(&udev->children[i]);
+ if (hub->ports[i]->child)
+ usb_disconnect(&hub->ports[i]->child);
}
/* deallocate hcd/hardware state ... nuking all pending urbs and
@@ -2113,7 +2177,8 @@ static void set_usb_port_removable(struct usb_device *udev)
return;
if (hub_is_superspeed(hdev)) {
- if (hub->descriptor->u.ss.DeviceRemovable & (1 << port))
+ if (le16_to_cpu(hub->descriptor->u.ss.DeviceRemovable)
+ & (1 << port))
removable = false;
} else {
if (hub->descriptor->u.hs.DeviceRemovable[port / 8] & (1 << (port % 8)))
@@ -3072,7 +3137,7 @@ static int hub_suspend(struct usb_interface *intf, pm_message_t msg)
for (port1 = 1; port1 <= hdev->maxchild; port1++) {
struct usb_device *udev;
- udev = hdev->children [port1-1];
+ udev = hub->ports[port1 - 1]->child;
if (udev && udev->can_submit) {
dev_warn(&intf->dev, "port %d nyet suspended\n", port1);
if (PMSG_IS_AUTO(msg))
@@ -3179,8 +3244,7 @@ static int usb_req_set_sel(struct usb_device *udev, enum usb3_link_state state)
(state == USB3_LPM_U2 &&
(u2_sel > USB3_LPM_MAX_U2_SEL_PEL ||
u2_pel > USB3_LPM_MAX_U2_SEL_PEL))) {
- dev_dbg(&udev->dev, "Device-initiated %s disabled due "
- "to long SEL %llu ms or PEL %llu ms\n",
+ dev_dbg(&udev->dev, "Device-initiated %s disabled due to long SEL %llu us or PEL %llu us\n",
usb3_lpm_names[state], u1_sel, u1_pel);
return -EINVAL;
}
@@ -3258,16 +3322,6 @@ static int usb_set_device_initiated_lpm(struct usb_device *udev,
if (enable) {
/*
- * First, let the device know about the exit latencies
- * associated with the link state we're about to enable.
- */
- ret = usb_req_set_sel(udev, state);
- if (ret < 0) {
- dev_warn(&udev->dev, "Set SEL for device-initiated "
- "%s failed.\n", usb3_lpm_names[state]);
- return -EBUSY;
- }
- /*
* Now send the control transfer to enable device-initiated LPM
* for either U1 or U2.
*/
@@ -3352,7 +3406,28 @@ static int usb_set_lpm_timeout(struct usb_device *udev,
static void usb_enable_link_state(struct usb_hcd *hcd, struct usb_device *udev,
enum usb3_link_state state)
{
- int timeout;
+ int timeout, ret;
+ __u8 u1_mel = udev->bos->ss_cap->bU1devExitLat;
+ __le16 u2_mel = udev->bos->ss_cap->bU2DevExitLat;
+
+ /* If the device says it doesn't have *any* exit latency to come out of
+ * U1 or U2, it's probably lying. Assume it doesn't implement that link
+ * state.
+ */
+ if ((state == USB3_LPM_U1 && u1_mel == 0) ||
+ (state == USB3_LPM_U2 && u2_mel == 0))
+ return;
+
+ /*
+ * First, let the device know about the exit latencies
+ * associated with the link state we're about to enable.
+ */
+ ret = usb_req_set_sel(udev, state);
+ if (ret < 0) {
+ dev_warn(&udev->dev, "Set SEL for device-initiated %s failed.\n",
+ usb3_lpm_names[state]);
+ return;
+ }
/* We allow the host controller to set the U1/U2 timeout internally
* first, so that it can change its schedule to account for the
@@ -3999,7 +4074,7 @@ hub_power_remaining (struct usb_hub *hub)
remaining = hdev->bus_mA - hub->descriptor->bHubContrCurrent;
for (port1 = 1; port1 <= hdev->maxchild; ++port1) {
- struct usb_device *udev = hdev->children[port1 - 1];
+ struct usb_device *udev = hub->ports[port1 - 1]->child;
int delta;
if (!udev)
@@ -4063,7 +4138,7 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
#endif
/* Try to resuscitate an existing device */
- udev = hdev->children[port1-1];
+ udev = hub->ports[port1 - 1]->child;
if ((portstatus & USB_PORT_STAT_CONNECTION) && udev &&
udev->state != USB_STATE_NOTATTACHED) {
usb_lock_device(udev);
@@ -4092,7 +4167,7 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
/* Disconnect any existing devices under this port */
if (udev)
- usb_disconnect(&hdev->children[port1-1]);
+ usb_disconnect(&hub->ports[port1 - 1]->child);
clear_bit(port1, hub->change_bits);
/* We can forget about a "removed" device when there's a physical
@@ -4228,7 +4303,7 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
if (hdev->state == USB_STATE_NOTATTACHED)
status = -ENOTCONN;
else
- hdev->children[port1-1] = udev;
+ hub->ports[port1 - 1]->child = udev;
spin_unlock_irq(&device_state_lock);
/* Run it through the hoops (find a driver, etc) */
@@ -4236,7 +4311,7 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
status = usb_new_device(udev);
if (status) {
spin_lock_irq(&device_state_lock);
- hdev->children[port1-1] = NULL;
+ hub->ports[port1 - 1]->child = NULL;
spin_unlock_irq(&device_state_lock);
}
}
@@ -4282,7 +4357,7 @@ static int hub_handle_remote_wakeup(struct usb_hub *hub, unsigned int port,
int ret;
hdev = hub->hdev;
- udev = hdev->children[port-1];
+ udev = hub->ports[port - 1]->child;
if (!hub_is_superspeed(hdev)) {
if (!(portchange & USB_PORT_STAT_C_SUSPEND))
return 0;
@@ -4436,7 +4511,7 @@ static void hub_events(void)
*/
if (!(portstatus & USB_PORT_STAT_ENABLE)
&& !connect_change
- && hdev->children[i-1]) {
+ && hub->ports[i - 1]->child) {
dev_err (hub_dev,
"port %i "
"disabled by hub (EMI?), "
@@ -4993,3 +5068,75 @@ void usb_queue_reset_device(struct usb_interface *iface)
schedule_work(&iface->reset_ws);
}
EXPORT_SYMBOL_GPL(usb_queue_reset_device);
+
+/**
+ * usb_hub_find_child - Get the pointer of child device
+ * attached to the port which is specified by @port1.
+ * @hdev: USB device belonging to the usb hub
+ * @port1: port num to indicate which port the child device
+ * is attached to.
+ *
+ * USB drivers call this function to get hub's child device
+ * pointer.
+ *
+ * Return NULL if input param is invalid and
+ * child's usb_device pointer if non-NULL.
+ */
+struct usb_device *usb_hub_find_child(struct usb_device *hdev,
+ int port1)
+{
+ struct usb_hub *hub = hdev_to_hub(hdev);
+
+ if (port1 < 1 || port1 > hdev->maxchild)
+ return NULL;
+ return hub->ports[port1 - 1]->child;
+}
+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
+ * @hdev: USB device belonging to the usb hub
+ * @port1: port num of the port
+ *
+ * Return port's acpi handle if successful, NULL if params are
+ * invaild.
+ */
+acpi_handle usb_get_hub_port_acpi_handle(struct usb_device *hdev,
+ int port1)
+{
+ struct usb_hub *hub = hdev_to_hub(hdev);
+
+ return DEVICE_ACPI_HANDLE(&hub->ports[port1 - 1]->dev);
+}
+#endif
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 0ab7da2283e3..1ed5afd91e6d 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -146,8 +146,6 @@ int usb_control_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
dr->wIndex = cpu_to_le16(index);
dr->wLength = cpu_to_le16(size);
- /* dbg("usb_control_msg"); */
-
ret = usb_internal_control_msg(dev, pipe, dr, data, size, timeout);
kfree(dr);
diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index e77a8e8eaa23..fdefd9c7f7af 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -209,7 +209,7 @@ void usb_detect_quirks(struct usb_device *udev)
* for all devices. It will affect things like hub resets
* and EMF-related port disables.
*/
- if (!(udev->quirks & USB_QUIRK_RESET_MORPHS))
+ if (!(udev->quirks & USB_QUIRK_RESET))
udev->persist_enabled = 1;
#endif /* CONFIG_PM */
}
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index 682e8256b95d..818e4a024d0d 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -196,7 +196,7 @@ show_avoid_reset_quirk(struct device *dev, struct device_attribute *attr, char *
struct usb_device *udev;
udev = to_usb_device(dev);
- return sprintf(buf, "%d\n", !!(udev->quirks & USB_QUIRK_RESET_MORPHS));
+ return sprintf(buf, "%d\n", !!(udev->quirks & USB_QUIRK_RESET));
}
static ssize_t
@@ -204,15 +204,15 @@ set_avoid_reset_quirk(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct usb_device *udev = to_usb_device(dev);
- int config;
+ int val;
- if (sscanf(buf, "%d", &config) != 1 || config < 0 || config > 1)
+ if (sscanf(buf, "%d", &val) != 1 || val < 0 || val > 1)
return -EINVAL;
usb_lock_device(udev);
- if (config)
- udev->quirks |= USB_QUIRK_RESET_MORPHS;
+ if (val)
+ udev->quirks |= USB_QUIRK_RESET;
else
- udev->quirks &= ~USB_QUIRK_RESET_MORPHS;
+ udev->quirks &= ~USB_QUIRK_RESET;
usb_unlock_device(udev);
return count;
}
diff --git a/drivers/usb/core/usb-acpi.c b/drivers/usb/core/usb-acpi.c
index 8947b203d5a4..cef4252bb31a 100644
--- a/drivers/usb/core/usb-acpi.c
+++ b/drivers/usb/core/usb-acpi.c
@@ -19,20 +19,91 @@
#include "usb.h"
-static int usb_acpi_check_upc(struct usb_device *udev, acpi_handle handle)
+/**
+ * usb_acpi_power_manageable - check whether usb port has
+ * acpi power resource.
+ * @hdev: USB device belonging to the usb hub
+ * @index: port index based zero
+ *
+ * Return true if the port has acpi power resource and false if no.
+ */
+bool usb_acpi_power_manageable(struct usb_device *hdev, int index)
+{
+ acpi_handle port_handle;
+ int port1 = index + 1;
+
+ port_handle = usb_get_hub_port_acpi_handle(hdev,
+ port1);
+ if (port_handle)
+ return acpi_bus_power_manageable(port_handle);
+ else
+ return false;
+}
+EXPORT_SYMBOL_GPL(usb_acpi_power_manageable);
+
+/**
+ * usb_acpi_set_power_state - control usb port's power via acpi power
+ * resource
+ * @hdev: USB device belonging to the usb hub
+ * @index: port index based zero
+ * @enable: power state expected to be set
+ *
+ * Notice to use usb_acpi_power_manageable() to check whether the usb port
+ * has acpi power resource before invoking this function.
+ *
+ * Returns 0 on success, else negative errno.
+ */
+int usb_acpi_set_power_state(struct usb_device *hdev, int index, bool enable)
+{
+ acpi_handle port_handle;
+ unsigned char state;
+ int port1 = index + 1;
+ int error = -EINVAL;
+
+ port_handle = (acpi_handle)usb_get_hub_port_acpi_handle(hdev,
+ port1);
+ if (!port_handle)
+ return error;
+
+ if (enable)
+ state = ACPI_STATE_D0;
+ else
+ state = ACPI_STATE_D3_COLD;
+
+ error = acpi_bus_set_power(port_handle, state);
+ if (!error)
+ dev_dbg(&hdev->dev, "The power of hub port %d was set to %d\n",
+ port1, enable);
+ else
+ dev_dbg(&hdev->dev, "The power of hub port failed to be set\n");
+
+ return error;
+}
+EXPORT_SYMBOL_GPL(usb_acpi_set_power_state);
+
+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_info *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;
@@ -40,69 +111,108 @@ 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:
+ ACPI_FREE(pld);
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;
- struct device *parent;
acpi_handle *parent_handle;
-
- if (!is_usb_device(dev))
- return -ENODEV;
-
- udev = to_usb_device(dev);
- parent = dev->parent;
- parent_handle = DEVICE_ACPI_HANDLE(parent);
-
- if (!parent_handle)
- return -ENODEV;
-
- *handle = acpi_get_child(parent_handle, udev->portnum);
-
- if (!*handle)
- return -ENODEV;
+ int port_num;
/*
- * 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.
+ * In the ACPI DSDT table, only usb root hub and usb ports are
+ * acpi device nodes. The hierarchy like following.
+ * Device (EHC1)
+ * Device (HUBN)
+ * Device (PR01)
+ * Device (PR11)
+ * Device (PR12)
+ * Device (PR13)
+ * ...
+ * So all binding process is divided into two parts. binding
+ * root hub and usb ports.
*/
- if (usb_acpi_check_pld(udev, *handle) != 0)
- usb_acpi_check_upc(udev, *handle);
+ if (is_usb_device(dev)) {
+ udev = to_usb_device(dev);
+ 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);
+ if (!*handle)
+ return -ENODEV;
+ return 0;
+ } else if (is_usb_port(dev)) {
+ sscanf(dev_name(dev), "port%d", &port_num);
+ /* Get the struct usb_device point of port's hub */
+ udev = to_usb_device(dev->parent->parent);
+
+ /*
+ * The root hub ports' parent is the root hub. The non-root-hub
+ * ports' parent is the parent hub port which the hub is
+ * connected to.
+ */
+ if (!udev->parent) {
+ *handle = acpi_get_child(DEVICE_ACPI_HANDLE(&udev->dev),
+ port_num);
+ if (!*handle)
+ return -ENODEV;
+ } else {
+ parent_handle =
+ usb_get_hub_port_acpi_handle(udev->parent,
+ udev->portnum);
+ if (!parent_handle)
+ return -ENODEV;
+
+ *handle = acpi_get_child(parent_handle, port_num);
+ if (!*handle)
+ return -ENODEV;
+ }
+ usb_acpi_check_port_connect_type(udev, *handle, port_num);
+ } else
+ return -ENODEV;
return 0;
}
static struct acpi_bus_type usb_acpi_bus = {
.bus = &usb_bus_type,
- .find_bridge = NULL,
+ .find_bridge = usb_acpi_find_device,
.find_device = usb_acpi_find_device,
};
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index acb103c5c391..1c528c1bf0be 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -1,4 +1,5 @@
#include <linux/pm.h>
+#include <linux/acpi.h>
struct dev_state;
@@ -115,6 +116,7 @@ extern struct bus_type usb_bus_type;
extern struct device_type usb_device_type;
extern struct device_type usb_if_device_type;
extern struct device_type usb_ep_device_type;
+extern struct device_type usb_port_device_type;
extern struct usb_device_driver usb_generic_driver;
static inline int is_usb_device(const struct device *dev)
@@ -132,6 +134,11 @@ static inline int is_usb_endpoint(const struct device *dev)
return dev->type == &usb_ep_device_type;
}
+static inline int is_usb_port(const struct device *dev)
+{
+ return dev->type == &usb_port_device_type;
+}
+
/* Do the same for device drivers and interface drivers. */
static inline int is_usb_device_driver(struct device_driver *drv)
@@ -162,10 +169,16 @@ 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);
extern void usb_acpi_unregister(void);
+extern acpi_handle usb_get_hub_port_acpi_handle(struct usb_device *hdev,
+ int port1);
#else
static inline int usb_acpi_register(void) { return 0; };
static inline void usb_acpi_unregister(void) { };
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.