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path: root/drivers/usb/core/hub.c
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Diffstat (limited to 'drivers/usb/core/hub.c')
-rw-r--r--drivers/usb/core/hub.c96
1 files changed, 66 insertions, 30 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 84c1897188d2..0f299b7aad60 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -24,7 +24,6 @@
#include <linux/kthread.h>
#include <linux/mutex.h>
#include <linux/freezer.h>
-#include <linux/pm_runtime.h>
#include <asm/uaccess.h>
#include <asm/byteorder.h>
@@ -677,6 +676,8 @@ static void hub_init_func3(struct work_struct *ws);
static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
{
struct usb_device *hdev = hub->hdev;
+ struct usb_hcd *hcd;
+ int ret;
int port1;
int status;
bool need_debounce_delay = false;
@@ -715,6 +716,25 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
usb_autopm_get_interface_no_resume(
to_usb_interface(hub->intfdev));
return; /* Continues at init2: below */
+ } else if (type == HUB_RESET_RESUME) {
+ /* The internal host controller state for the hub device
+ * may be gone after a host power loss on system resume.
+ * Update the device's info so the HW knows it's a hub.
+ */
+ hcd = bus_to_hcd(hdev->bus);
+ if (hcd->driver->update_hub_device) {
+ ret = hcd->driver->update_hub_device(hcd, hdev,
+ &hub->tt, GFP_NOIO);
+ if (ret < 0) {
+ dev_err(hub->intfdev, "Host not "
+ "accepting hub info "
+ "update.\n");
+ dev_err(hub->intfdev, "LS/FS devices "
+ "and hubs may not work "
+ "under this hub\n.");
+ }
+ }
+ hub_power_on(hub, true);
} else {
hub_power_on(hub, true);
}
@@ -758,6 +778,9 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
clear_port_feature(hdev, port1,
USB_PORT_FEAT_ENABLE);
portstatus &= ~USB_PORT_STAT_ENABLE;
+ } else {
+ /* Pretend that power was lost for USB3 devs */
+ portstatus &= ~USB_PORT_STAT_ENABLE;
}
}
@@ -1801,8 +1824,15 @@ int usb_new_device(struct usb_device *udev)
/* Tell the runtime-PM framework the device is active */
pm_runtime_set_active(&udev->dev);
+ pm_runtime_get_noresume(&udev->dev);
+ pm_runtime_use_autosuspend(&udev->dev);
pm_runtime_enable(&udev->dev);
+ /* By default, forbid autosuspend for all devices. It will be
+ * allowed for hubs during binding.
+ */
+ usb_disable_autosuspend(udev);
+
err = usb_enumerate_device(udev); /* Read descriptors */
if (err < 0)
goto fail;
@@ -1828,6 +1858,8 @@ int usb_new_device(struct usb_device *udev)
}
(void) usb_create_ep_devs(&udev->dev, &udev->ep0, udev);
+ usb_mark_last_busy(udev);
+ pm_runtime_put_sync_autosuspend(&udev->dev);
return err;
fail:
@@ -2218,6 +2250,7 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
usb_set_device_state(udev, USB_STATE_SUSPENDED);
msleep(10);
}
+ usb_mark_last_busy(hub->hdev);
return status;
}
@@ -2594,16 +2627,14 @@ static int hub_set_address(struct usb_device *udev, int devnum)
return 0;
if (udev->state != USB_STATE_DEFAULT)
return -EINVAL;
- if (hcd->driver->address_device) {
+ if (hcd->driver->address_device)
retval = hcd->driver->address_device(hcd, udev);
- } else {
+ else
retval = usb_control_msg(udev, usb_sndaddr0pipe(),
USB_REQ_SET_ADDRESS, 0, devnum, 0,
NULL, 0, USB_CTRL_SET_TIMEOUT);
- if (retval == 0)
- update_address(udev, devnum);
- }
if (retval == 0) {
+ update_address(udev, devnum);
/* Device now using proper address. */
usb_set_device_state(udev, USB_STATE_ADDRESS);
usb_ep0_reinit(udev);
@@ -2650,17 +2681,13 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
mutex_lock(&usb_address0_mutex);
- if (!udev->config && oldspeed == USB_SPEED_SUPER) {
- /* Don't reset USB 3.0 devices during an initial setup */
- usb_set_device_state(udev, USB_STATE_DEFAULT);
- } else {
- /* Reset the device; full speed may morph to high speed */
- /* FIXME a USB 2.0 device may morph into SuperSpeed on reset. */
- retval = hub_port_reset(hub, port1, udev, delay);
- if (retval < 0) /* error or disconnect */
- goto fail;
- /* success, speed is known */
- }
+ /* Reset the device; full speed may morph to high speed */
+ /* FIXME a USB 2.0 device may morph into SuperSpeed on reset. */
+ retval = hub_port_reset(hub, port1, udev, delay);
+ if (retval < 0) /* error or disconnect */
+ goto fail;
+ /* success, speed is known */
+
retval = -ENODEV;
if (oldspeed != USB_SPEED_UNKNOWN && oldspeed != udev->speed) {
@@ -2722,6 +2749,11 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
udev->ttport = hdev->ttport;
} else if (udev->speed != USB_SPEED_HIGH
&& hdev->speed == USB_SPEED_HIGH) {
+ if (!hub->tt.hub) {
+ dev_err(&udev->dev, "parent hub has no TT\n");
+ retval = -EINVAL;
+ goto fail;
+ }
udev->tt = &hub->tt;
udev->ttport = port1;
}
@@ -2860,13 +2892,16 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
else
i = udev->descriptor.bMaxPacketSize0;
if (le16_to_cpu(udev->ep0.desc.wMaxPacketSize) != i) {
- if (udev->speed != USB_SPEED_FULL ||
+ if (udev->speed == USB_SPEED_LOW ||
!(i == 8 || i == 16 || i == 32 || i == 64)) {
- dev_err(&udev->dev, "ep0 maxpacket = %d\n", i);
+ dev_err(&udev->dev, "Invalid ep0 maxpacket: %d\n", i);
retval = -EMSGSIZE;
goto fail;
}
- dev_dbg(&udev->dev, "ep0 maxpacket = %d\n", i);
+ if (udev->speed == USB_SPEED_FULL)
+ dev_dbg(&udev->dev, "ep0 maxpacket = %d\n", i);
+ else
+ dev_warn(&udev->dev, "Using ep0 maxpacket: %d\n", i);
udev->ep0.desc.wMaxPacketSize = cpu_to_le16(i);
usb_ep0_reinit(udev);
}
@@ -3097,16 +3132,17 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
udev->speed = USB_SPEED_UNKNOWN;
/*
- * xHCI needs to issue an address device command later
- * in the hub_port_init sequence for SS/HS/FS/LS devices.
+ * Set the address.
+ * Note xHCI needs to issue an address device command later
+ * in the hub_port_init sequence for SS/HS/FS/LS devices,
+ * and xHC will assign an address to the device. But use
+ * kernel assigned address here, to avoid any address conflict
+ * issue.
*/
- if (!(hcd->driver->flags & HCD_USB3)) {
- /* set the address */
- choose_address(udev);
- if (udev->devnum <= 0) {
- status = -ENOTCONN; /* Don't retry */
- goto loop;
- }
+ choose_address(udev);
+ if (udev->devnum <= 0) {
+ status = -ENOTCONN; /* Don't retry */
+ goto loop;
}
/* reset (non-USB 3.0 devices) and get descriptor */
@@ -3629,7 +3665,7 @@ static int usb_reset_and_verify_device(struct usb_device *udev)
}
if (!parent_hdev) {
- /* this requires hcd-specific logic; see OHCI hc_restart() */
+ /* this requires hcd-specific logic; see ohci_restart() */
dev_dbg(&udev->dev, "%s for root hub!\n", __func__);
return -EISDIR;
}
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