#include <linux/usbdevice_fs.h>
#include <linux/kthread.h>
#include <linux/mutex.h>
+#include <linux/freezer.h>
#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include "hcd.h"
#include "hub.h"
+struct usb_hub {
+ struct device *intfdev; /* the "interface" device */
+ struct usb_device *hdev;
+ struct urb *urb; /* for interrupt polling pipe */
+
+ /* buffer for urb ... with extra space in case of babble */
+ char (*buffer)[8];
+ dma_addr_t buffer_dma; /* DMA address for buffer */
+ union {
+ struct usb_hub_status hub;
+ struct usb_port_status port;
+ } *status; /* buffer for status reports */
+ struct mutex status_mutex; /* for the status buffer */
+
+ int error; /* last reported error */
+ int nerrors; /* track consecutive errors */
+
+ struct list_head event_list; /* hubs w/data or errs ready */
+ unsigned long event_bits[1]; /* status change bitmask */
+ unsigned long change_bits[1]; /* ports with logical connect
+ status change */
+ unsigned long busy_bits[1]; /* ports being reset or
+ resumed */
+#if USB_MAXCHILDREN > 31 /* 8*sizeof(unsigned long) - 1 */
+#error event_bits[] is too short!
+#endif
+
+ struct usb_hub_descriptor *descriptor; /* class descriptor */
+ struct usb_tt tt; /* Transaction Translator */
+
+ unsigned mA_per_port; /* current for each child */
+
+ unsigned limited_power:1;
+ unsigned quiescing:1;
+ unsigned activating:1;
+
+ unsigned has_indicators:1;
+ u8 indicator[USB_MAXCHILDREN];
+ struct delayed_work leds;
+};
+
+
/* Protect struct usb_device->state and ->children members
* Note: Both are also protected by ->dev.sem, except that ->state can
* change to USB_STATE_NOTATTACHED even when the semaphore isn't held. */
"first one fails");
-#ifdef DEBUG
-static inline char *portspeed (int portstatus)
+static inline char *portspeed(int portstatus)
{
if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED))
return "480 Mb/s";
else
return "12 Mb/s";
}
-#endif
/* Note that hdev or one of its children must be locked! */
static inline struct usb_hub *hdev_to_hub(struct usb_device *hdev)
#define LED_CYCLE_PERIOD ((2*HZ)/3)
-static void led_work (void *__hub)
+static void led_work (struct work_struct *work)
{
- struct usb_hub *hub = __hub;
+ struct usb_hub *hub =
+ container_of(work, struct usb_hub, leds.work);
struct usb_device *hdev = hub->hdev;
unsigned i;
unsigned changed = 0;
{
unsigned long flags;
+ /* Suppress autosuspend until khubd runs */
+ to_usb_interface(hub->intfdev)->pm_usage_cnt = 1;
+
spin_lock_irqsave(&hub_event_lock, flags);
if (list_empty(&hub->event_list)) {
list_add_tail(&hub->event_list, &hub_event_list);
* talking to TTs must queue control transfers (not just bulk and iso), so
* both can talk to the same hub concurrently.
*/
-static void hub_tt_kevent (void *arg)
+static void hub_tt_kevent (struct work_struct *work)
{
- struct usb_hub *hub = arg;
+ struct usb_hub *hub =
+ container_of(work, struct usb_hub, tt.kevent);
unsigned long flags;
spin_lock_irqsave (&hub->tt.lock, flags);
* since each TT has "at least two" buffers that can need it (and
* there can be many TTs per hub). even if they're uncommon.
*/
- if ((clear = kmalloc (sizeof *clear, SLAB_ATOMIC)) == NULL) {
+ if ((clear = kmalloc (sizeof *clear, GFP_ATOMIC)) == NULL) {
dev_err (&udev->dev, "can't save CLEAR_TT_BUFFER state\n");
/* FIXME recover somehow ... RESET_TT? */
return;
/* (nonblocking) khubd and related activity won't re-trigger */
hub->quiescing = 1;
hub->activating = 0;
- hub->resume_root_hub = 0;
/* (blocking) stop khubd and related activity */
usb_kill_urb(hub->urb);
hub->quiescing = 0;
hub->activating = 1;
- hub->resume_root_hub = 0;
+
status = usb_submit_urb(hub->urb, GFP_NOIO);
if (status < 0)
dev_err(hub->intfdev, "activate --> %d\n", status);
{
int ret;
+ mutex_lock(&hub->status_mutex);
ret = get_hub_status(hub->hdev, &hub->status->hub);
if (ret < 0)
dev_err (hub->intfdev,
*change = le16_to_cpu(hub->status->hub.wHubChange);
ret = 0;
}
+ mutex_unlock(&hub->status_mutex);
return ret;
}
ret = -ENOMEM;
goto fail;
}
+ mutex_init(&hub->status_mutex);
hub->descriptor = kmalloc(sizeof(*hub->descriptor), GFP_KERNEL);
if (!hub->descriptor) {
spin_lock_init (&hub->tt.lock);
INIT_LIST_HEAD (&hub->tt.clear_list);
- INIT_WORK (&hub->tt.kevent, hub_tt_kevent, hub);
+ INIT_WORK (&hub->tt.kevent, hub_tt_kevent);
switch (hdev->descriptor.bDeviceProtocol) {
case 0:
break;
dev_dbg(hub_dev, "%sover-current condition exists\n",
(hubstatus & HUB_STATUS_OVERCURRENT) ? "" : "no ");
- /* set up the interrupt endpoint */
+ /* set up the interrupt endpoint
+ * We use the EP's maxpacket size instead of (PORTS+1+7)/8
+ * bytes as USB2.0[11.12.3] says because some hubs are known
+ * to send more data (and thus cause overflow). For root hubs,
+ * maxpktsize is defined in hcd.c's fake endpoint descriptors
+ * to be big enough for at least USB_MAXCHILDREN ports. */
pipe = usb_rcvintpipe(hdev, endpoint->bEndpointAddress);
maxp = usb_maxpacket(hdev, pipe, usb_pipeout(pipe));
INIT_LIST_HEAD(&hub->event_list);
hub->intfdev = &intf->dev;
hub->hdev = hdev;
- INIT_WORK(&hub->leds, led_work, hub);
+ INIT_DELAYED_WORK(&hub->leds, led_work);
usb_set_intfdata (intf, hub);
+ intf->needs_remote_wakeup = 1;
if (hdev->speed == USB_SPEED_HIGH)
highspeed_hubs++;
if (udev->children[i])
recursively_mark_NOTATTACHED(udev->children[i]);
}
+ if (udev->state == USB_STATE_SUSPENDED)
+ udev->discon_suspended = 1;
udev->state = USB_STATE_NOTATTACHED;
}
*pdev = NULL;
spin_unlock_irq(&device_state_lock);
+ /* Decrement the parent's count of unsuspended children */
+ if (udev->parent) {
+ usb_pm_lock(udev);
+ if (!udev->discon_suspended)
+ usb_autosuspend_device(udev->parent);
+ usb_pm_unlock(udev);
+ }
+
put_device(&udev->dev);
}
* udev has already been installed, but udev is not yet visible through
* sysfs or other filesystem code.
*
- * Returns 0 for success (device is configured and listed, with its
- * interfaces, in sysfs); else a negative errno value.
+ * It will return if the device is configured properly or not. Zero if
+ * the interface was registered with the driver core; else a negative
+ * errno value.
*
* This call is synchronous, and may not be used in an interrupt context.
*
{
int err;
+ /* Determine quirks */
+ usb_detect_quirks(udev);
+
err = usb_get_configuration(udev);
if (err < 0) {
dev_err(&udev->dev, "can't read configurations, error %d\n",
goto fail;
}
- return 0;
+ /* Increment the parent's count of unsuspended children */
+ if (udev->parent)
+ usb_autoresume_device(udev->parent);
+
+exit:
+ return err;
fail:
usb_set_device_state(udev, USB_STATE_NOTATTACHED);
- return err;
+ goto exit;
}
-
static int hub_port_status(struct usb_hub *hub, int port1,
u16 *status, u16 *change)
{
int ret;
+ mutex_lock(&hub->status_mutex);
ret = get_port_status(hub->hdev, port1, &hub->status->port);
- if (ret < 0)
+ if (ret < 4) {
dev_err (hub->intfdev,
"%s failed (err = %d)\n", __FUNCTION__, ret);
- else {
+ if (ret >= 0)
+ ret = -EIO;
+ } else {
*status = le16_to_cpu(hub->status->port.wPortStatus);
*change = le16_to_cpu(hub->status->port.wPortChange);
ret = 0;
}
+ mutex_unlock(&hub->status_mutex);
return ret;
}
hub_port_resume(struct usb_hub *hub, int port1, struct usb_device *udev)
{
int status;
+ u16 portchange, portstatus;
+
+ /* Skip the initial Clear-Suspend step for a remote wakeup */
+ status = hub_port_status(hub, port1, &portstatus, &portchange);
+ if (status == 0 && !(portstatus & USB_PORT_STAT_SUSPEND))
+ goto SuspendCleared;
// dev_dbg(hub->intfdev, "resume port %d\n", port1);
"can't resume port %d, status %d\n",
port1, status);
} else {
- u16 devstatus;
- u16 portchange;
-
/* drive resume for at least 20 msec */
if (udev)
dev_dbg(&udev->dev, "usb %sresume\n",
* stop resume signaling. Then finish the resume
* sequence.
*/
- devstatus = portchange = 0;
- status = hub_port_status(hub, port1,
- &devstatus, &portchange);
+ status = hub_port_status(hub, port1, &portstatus, &portchange);
+SuspendCleared:
if (status < 0
- || (devstatus & LIVE_FLAGS) != LIVE_FLAGS
- || (devstatus & USB_PORT_STAT_SUSPEND) != 0
+ || (portstatus & LIVE_FLAGS) != LIVE_FLAGS
+ || (portstatus & USB_PORT_STAT_SUSPEND) != 0
) {
dev_dbg(hub->intfdev,
"port %d status %04x.%04x after resume, %d\n",
- port1, portchange, devstatus, status);
+ port1, portchange, portstatus, status);
if (status >= 0)
status = -ENODEV;
} else {
{
int status = 0;
- /* All this just to avoid sending a port-resume message
- * to the parent hub! */
-
usb_lock_device(udev);
- usb_pm_lock(udev);
if (udev->state == USB_STATE_SUSPENDED) {
dev_dbg(&udev->dev, "usb %sresume\n", "wakeup-");
- /* TRSMRCY = 10 msec */
- msleep(10);
- status = finish_port_resume(udev);
- if (status == 0)
- udev->dev.power.power_state.event = PM_EVENT_ON;
+ status = usb_external_resume_device(udev);
}
- usb_pm_unlock(udev);
-
- if (status == 0)
- usb_autoresume_device(udev, 0);
usb_unlock_device(udev);
return status;
}
struct usb_hub *hub = usb_get_intfdata (intf);
struct usb_device *hdev = hub->hdev;
unsigned port1;
+ int status = 0;
/* fail if children aren't already suspended */
for (port1 = 1; port1 <= hdev->maxchild; port1++) {
}
}
- /* "global suspend" of the downstream HC-to-USB interface */
- if (!hdev->parent) {
- struct usb_bus *bus = hdev->bus;
- if (bus) {
- int status = hcd_bus_suspend (bus);
-
- if (status != 0) {
- dev_dbg(&hdev->dev, "'global' suspend %d\n",
- status);
- return status;
- }
- } else
- return -EOPNOTSUPP;
- }
+ dev_dbg(&intf->dev, "%s\n", __FUNCTION__);
/* stop khubd and related activity */
hub_quiesce(hub);
- return 0;
+
+ /* "global suspend" of the downstream HC-to-USB interface */
+ if (!hdev->parent) {
+ status = hcd_bus_suspend(hdev->bus);
+ if (status != 0) {
+ dev_dbg(&hdev->dev, "'global' suspend %d\n", status);
+ hub_activate(hub);
+ }
+ }
+ return status;
}
static int hub_resume(struct usb_interface *intf)
{
- struct usb_device *hdev = interface_to_usbdev(intf);
struct usb_hub *hub = usb_get_intfdata (intf);
+ struct usb_device *hdev = hub->hdev;
int status;
+ dev_dbg(&intf->dev, "%s\n", __FUNCTION__);
+
/* "global resume" of the downstream HC-to-USB interface */
if (!hdev->parent) {
struct usb_bus *bus = hdev->bus;
#define hub_resume NULL
#endif
-void usb_resume_root_hub(struct usb_device *hdev)
-{
- struct usb_hub *hub = hdev_to_hub(hdev);
-
- hub->resume_root_hub = 1;
- kick_khubd(hub);
-}
-
/* USB 2.0 spec, 7.1.7.3 / fig 7-29:
*
struct usb_qualifier_descriptor *qual;
int status;
- qual = kmalloc (sizeof *qual, SLAB_KERNEL);
+ qual = kmalloc (sizeof *qual, GFP_KERNEL);
if (qual == NULL)
return;
/* hub LEDs are probably harder to miss than syslog */
if (hub->has_indicators) {
hub->indicator[port1-1] = INDICATOR_GREEN_BLINK;
- schedule_work (&hub->leds);
+ schedule_delayed_work (&hub->leds, 0);
}
}
kfree(qual);
if (portchange & USB_PORT_STAT_C_CONNECTION) {
status = hub_port_debounce(hub, port1);
- if (status < 0) {
+ if (status < 0 && printk_ratelimit()) {
dev_err (hub_dev,
"connect-debounce failed, port %d disabled\n",
port1);
if (hub->has_indicators) {
hub->indicator[port1-1] =
INDICATOR_AMBER_BLINK;
- schedule_work (&hub->leds);
+ schedule_delayed_work (&hub->leds, 0);
}
status = -ENOTCONN; /* Don't retry */
goto loop_disable;
intf = to_usb_interface(hub->intfdev);
hub_dev = &intf->dev;
- i = hub->resume_root_hub;
-
- dev_dbg(hub_dev, "state %d ports %d chg %04x evt %04x%s\n",
+ dev_dbg(hub_dev, "state %d ports %d chg %04x evt %04x\n",
hdev->state, hub->descriptor
? hub->descriptor->bNbrPorts
: 0,
/* NOTE: expects max 15 ports... */
(u16) hub->change_bits[0],
- (u16) hub->event_bits[0],
- i ? ", resume root" : "");
+ (u16) hub->event_bits[0]);
usb_get_intf(intf);
spin_unlock_irq(&hub_event_lock);
goto loop;
}
- /* Is this is a root hub wanting to reactivate the downstream
- * ports? If so, be sure the interface resumes even if its
- * stub "device" node was never suspended.
- */
- if (i)
- usb_autoresume_device(hdev, 0);
+ /* Autoresume */
+ ret = usb_autopm_get_interface(intf);
+ if (ret) {
+ dev_dbg(hub_dev, "Can't autoresume: %d\n", ret);
+ goto loop;
+ }
- /* If this is an inactive or suspended hub, do nothing */
+ /* If this is an inactive hub, do nothing */
if (hub->quiescing)
- goto loop;
+ goto loop_autopm;
if (hub->error) {
dev_dbg (hub_dev, "resetting for error %d\n",
if (ret) {
dev_dbg (hub_dev,
"error resetting hub: %d\n", ret);
- goto loop;
+ goto loop_autopm;
}
hub->nerrors = 0;
if (!hdev->parent && !hub->busy_bits[0])
usb_enable_root_hub_irq(hdev->bus);
+loop_autopm:
+ /* Allow autosuspend if we're not going to run again */
+ if (list_empty(&hub->event_list))
+ usb_autopm_enable(intf);
loop:
usb_unlock_device(hdev);
usb_put_intf(intf);
.post_reset = hub_post_reset,
.ioctl = hub_ioctl,
.id_table = hub_id_table,
+ .supports_autosuspend = 1,
};
int usb_hub_init(void)
if (len < le16_to_cpu(udev->config[index].desc.wTotalLength))
len = le16_to_cpu(udev->config[index].desc.wTotalLength);
}
- buf = kmalloc (len, SLAB_KERNEL);
+ buf = kmalloc (len, GFP_KERNEL);
if (buf == NULL) {
dev_err(&udev->dev, "no mem to re-read configs after reset\n");
/* assume the worst */
}
/* Prevent autosuspend during the reset */
- usb_autoresume_device(udev, 1);
+ usb_autoresume_device(udev);
if (iface && iface->condition != USB_INTERFACE_BINDING)
iface = NULL;
}
}
- usb_autosuspend_device(udev, 1);
+ usb_autosuspend_device(udev);
return ret;
}
EXPORT_SYMBOL(usb_reset_composite_device);
projects / powerpc.git / blobdiff