static int usb_hub_reset(struct usb_hub *hub)
{
struct usb_device *dev = hub->dev;
int i;
DBG_HOST_HUB("### >>> Enter hub.c file --> usb_hub_reset function \n");
/* Disconnect any attached devices */
for (i = 0; i < hub->descriptor->bNbrPorts; i++) {
if (dev->children[i])
usb_disconnect(&dev->children[i]);
}
/* Attempt to reset the hub */
if (hub->urb)
usb_unlink_urb(hub->urb);
else
return -1;
if (usb_reset_device(dev))
return -1;
hub->urb->dev = dev;
if (usb_submit_urb(hub->urb))
return -1;
usb_hub_power_on(hub);
return 0;
}
static int usb_hub_reset(struct usb_hub *hub)
{
struct usb_device *dev = hub->dev;
int i;
/* Disconnect any attached devices */
for (i = 0; i < hub->nports; i++) {
if (dev->children[i])
usb_disconnect(&dev->children[i]);
}
/* Attempt to reset the hub */
if (hub->urb)
usb_unlink_urb(hub->urb);
else
return -1;
if (usb_reset_device(dev))
return -1;
if (usb_submit_urb(hub->urb))
return -1;
usb_hub_power_on(hub);
return 0;
}
static void usb_hub_events(void)
{
unsigned long flags;
struct list_head *tmp;
struct usb_device *dev;
struct usb_hub *hub;
struct usb_hub_status hubsts;
u16 hubstatus;
u16 hubchange;
u16 portstatus;
u16 portchange;
int i, ret;
/*
* We restart the list everytime to avoid a deadlock with
* deleting hubs downstream from this one. This should be
* safe since we delete the hub from the event list.
* Not the most efficient, but avoids deadlocks.
*/
DBG_HOST_HUB("### >>> Enter hub.c file --> usb_hub_events function \n");
while (1) {
spin_lock_irqsave(&hub_event_lock, flags);
if (list_empty(&hub_event_list))
break;
/* Grab the next entry from the beginning of the list */
tmp = hub_event_list.next;
hub = list_entry(tmp, struct usb_hub, event_list);
dev = hub->dev;
list_del(tmp);
INIT_LIST_HEAD(tmp);
down(&hub->khubd_sem); /* never blocks, we were on list */
spin_unlock_irqrestore(&hub_event_lock, flags);
if (hub->error) {
dbg("resetting hub %d for error %d", dev->devnum, hub->error);
if (usb_hub_reset(hub)) {
err("error resetting hub %d - disconnecting", dev->devnum);
up(&hub->khubd_sem);
usb_hub_disconnect(dev);
continue;
}
hub->nerrors = 0;
hub->error = 0;
}
for (i = 0; i < hub->descriptor->bNbrPorts; i++) {
ret = usb_hub_port_status(dev, i, &portstatus, &portchange);
if (ret < 0) {
continue;
}
if (portchange & USB_PORT_STAT_C_CONNECTION) {
dbg("port %d connection change", i + 1);
usb_hub_port_connect_change(hub, i, portstatus, portchange);
} else if (portchange & USB_PORT_STAT_C_ENABLE) {
dbg("port %d enable change, status %x", i + 1, portstatus);
usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_ENABLE);
/*
* EM interference sometimes causes bad shielded USB devices to
* be shutdown by the hub, this hack enables them again.
* Works at least with mouse driver.
*/
if (!(portstatus & USB_PORT_STAT_ENABLE) &&
(portstatus & USB_PORT_STAT_CONNECTION) && (dev->children[i])) {
err("already running port %i disabled by hub (EMI?), re-enabling...",
i + 1);
usb_hub_port_connect_change(hub, i, portstatus, portchange);
}
}
if (portchange & USB_PORT_STAT_C_SUSPEND) {
dbg("port %d suspend change", i + 1);
usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_SUSPEND);
}
if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
err("port %d over-current change", i + 1);
usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_OVER_CURRENT);
usb_hub_power_on(hub);
}
if (portchange & USB_PORT_STAT_C_RESET) {
dbg("port %d reset change", i + 1);
usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET);
}
} /* end for i */
/* deal with hub status changes */
if (usb_get_hub_status(dev, &hubsts) < 0)
err("get_hub_status failed");
else {
hubstatus = le16_to_cpup(&hubsts.wHubStatus);
hubchange = le16_to_cpup(&hubsts.wHubChange);
if (hubchange & HUB_CHANGE_LOCAL_POWER) {
dbg("hub power change");
usb_clear_hub_feature(dev, C_HUB_LOCAL_POWER);
}
if (hubchange & HUB_CHANGE_OVERCURRENT) {
dbg("hub overcurrent change");
wait_ms(500); /* Cool down */
usb_clear_hub_feature(dev, C_HUB_OVER_CURRENT);
usb_hub_power_on(hub);
}
}
up(&hub->khubd_sem);
} /* end while (1) */
spin_unlock_irqrestore(&hub_event_lock, flags);
}
static int usb_hub_configure(struct usb_hub *hub, struct usb_endpoint_descriptor *endpoint)
{
struct usb_device *dev = hub->dev;
struct usb_hub_status hubstatus;
char portstr[USB_MAXCHILDREN + 1];
unsigned int pipe;
int i, maxp, ret;
DBG_HOST_HUB("### >>> Enter hub.c file --> usb_hub_configure function \n");
hub->descriptor = kmalloc(sizeof(*hub->descriptor), GFP_KERNEL);
if (!hub->descriptor) {
err("Unable to kmalloc %Zd bytes for hub descriptor", sizeof(*hub->descriptor));
return -1;
}
/* Request the entire hub descriptor. */
ret = usb_get_hub_descriptor(dev, hub->descriptor, sizeof(*hub->descriptor));
/* <hub->descriptor> is large enough for a hub with 127 ports;
* the hub can/will return fewer bytes here. */
if (ret < 0) {
err("Unable to get hub descriptor (err = %d)", ret);
kfree(hub->descriptor);
return -1;
}
dev->maxchild = hub->descriptor->bNbrPorts;
info("%d port%s detected", hub->descriptor->bNbrPorts, (hub->descriptor->bNbrPorts == 1) ? "" : "s");
le16_to_cpus(&hub->descriptor->wHubCharacteristics);
if (hub->descriptor->wHubCharacteristics & HUB_CHAR_COMPOUND)
dbg("part of a compound device");
else
dbg("standalone hub");
switch (hub->descriptor->wHubCharacteristics & HUB_CHAR_LPSM) {
case 0x00:
dbg("ganged power switching");
break;
case 0x01:
dbg("individual port power switching");
break;
case 0x02:
case 0x03:
dbg("unknown reserved power switching mode");
break;
}
switch (hub->descriptor->wHubCharacteristics & HUB_CHAR_OCPM) {
case 0x00:
dbg("global over-current protection");
break;
case 0x08:
dbg("individual port over-current protection");
break;
case 0x10:
case 0x18:
dbg("no over-current protection");
break;
}
switch (dev->descriptor.bDeviceProtocol) {
case 0:
break;
case 1:
dbg("Single TT");
hub->tt.hub = dev;
break;
case 2:
dbg("TT per port");
hub->tt.hub = dev;
hub->tt.multi = 1;
break;
default:
dbg("Unrecognized hub protocol %d",
dev->descriptor.bDeviceProtocol);
break;
}
switch (hub->descriptor->wHubCharacteristics & HUB_CHAR_TTTT) {
case 0x00:
if (dev->descriptor.bDeviceProtocol != 0)
dbg("TT requires at most 8 FS bit times");
break;
case 0x20:
dbg("TT requires at most 16 FS bit times");
break;
case 0x40:
dbg("TT requires at most 24 FS bit times");
break;
case 0x60:
dbg("TT requires at most 32 FS bit times");
break;
}
dbg("Port indicators are %s supported",
(hub->descriptor->wHubCharacteristics & HUB_CHAR_PORTIND) ? "" : "not");
dbg("power on to power good time: %dms", hub->descriptor->bPwrOn2PwrGood * 2);
dbg("hub controller current requirement: %dmA", hub->descriptor->bHubContrCurrent);
for (i = 0; i < dev->maxchild; i++)
portstr[i] = hub->descriptor->DeviceRemovable[((i + 1) / 8)] & (1 << ((i + 1) % 8)) ? 'F' : 'R';
portstr[dev->maxchild] = 0;
dbg("port removable status: %s", portstr);
ret = usb_get_hub_status(dev, &hubstatus);
if (ret < 0) {
err("Unable to get hub status (err = %d)", ret);
kfree(hub->descriptor);
return -1;
}
le16_to_cpus(&hubstatus.wHubStatus);
dbg("local power source is %s",
(hubstatus.wHubStatus & HUB_STATUS_LOCAL_POWER) ? "lost (inactive)" : "good");
dbg("%sover-current condition exists",
(hubstatus.wHubStatus & HUB_STATUS_OVERCURRENT) ? "" : "no ");
/* Start the interrupt endpoint */
pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
if (maxp > sizeof(hub->buffer))
maxp = sizeof(hub->buffer);
hub->urb = usb_alloc_urb(0);
if (!hub->urb) {
err("couldn't allocate interrupt urb");
kfree(hub->descriptor);
return -1;
}
FILL_INT_URB(hub->urb, dev, pipe, hub->buffer, maxp, hub_irq,
hub, endpoint->bInterval);
ret = usb_submit_urb(hub->urb);
if (ret) {
err("usb_submit_urb failed (%d)", ret);
kfree(hub->descriptor);
return -1;
}
/* Wake up khubd */
wake_up(&khubd_wait);
usb_hub_power_on(hub);
return 0;
}
static int usb_hub_configure(struct usb_device *dev)
{
int i, length;
ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ);
unsigned char *bitmap;
short hubCharacteristics;
struct usb_hub_descriptor *descriptor;
struct usb_hub_device *hub;
__maybe_unused struct usb_hub_status *hubsts;
/* "allocate" Hub device */
hub = usb_hub_allocate();
if (hub == NULL)
return -1;
hub->pusb_dev = dev;
/* Get the the hub descriptor */
if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
debug("usb_hub_configure: failed to get hub " \
"descriptor, giving up %lX\n", dev->status);
return -1;
}
descriptor = (struct usb_hub_descriptor *)buffer;
length = min_t(int, descriptor->bLength,
sizeof(struct usb_hub_descriptor));
if (usb_get_hub_descriptor(dev, buffer, length) < 0) {
debug("usb_hub_configure: failed to get hub " \
"descriptor 2nd giving up %lX\n", dev->status);
return -1;
}
memcpy((unsigned char *)&hub->desc, buffer, length);
/* adjust 16bit values */
put_unaligned(le16_to_cpu(get_unaligned(
&descriptor->wHubCharacteristics)),
&hub->desc.wHubCharacteristics);
/* set the bitmap */
bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
/* devices not removable by default */
memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];
dev->maxchild = descriptor->bNbrPorts;
debug("%d ports detected\n", dev->maxchild);
hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics);
switch (hubCharacteristics & HUB_CHAR_LPSM) {
case 0x00:
debug("ganged power switching\n");
break;
case 0x01:
debug("individual port power switching\n");
break;
case 0x02:
case 0x03:
debug("unknown reserved power switching mode\n");
break;
}
if (hubCharacteristics & HUB_CHAR_COMPOUND)
debug("part of a compound device\n");
else
debug("standalone hub\n");
switch (hubCharacteristics & HUB_CHAR_OCPM) {
case 0x00:
debug("global over-current protection\n");
break;
case 0x08:
debug("individual port over-current protection\n");
break;
case 0x10:
case 0x18:
debug("no over-current protection\n");
break;
}
debug("power on to power good time: %dms\n",
descriptor->bPwrOn2PwrGood * 2);
debug("hub controller current requirement: %dmA\n",
descriptor->bHubContrCurrent);
for (i = 0; i < dev->maxchild; i++)
debug("port %d is%s removable\n", i + 1,
hub->desc.DeviceRemovable[(i + 1) / 8] & \
(1 << ((i + 1) % 8)) ? " not" : "");
if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
debug("usb_hub_configure: failed to get Status - " \
"too long: %d\n", descriptor->bLength);
return -1;
}
if (usb_get_hub_status(dev, buffer) < 0) {
debug("usb_hub_configure: failed to get Status %lX\n",
dev->status);
return -1;
}
#ifdef DEBUG
hubsts = (struct usb_hub_status *)buffer;
#endif
debug("get_hub_status returned status %X, change %X\n",
le16_to_cpu(hubsts->wHubStatus),
le16_to_cpu(hubsts->wHubChange));
debug("local power source is %s\n",
(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
"lost (inactive)" : "good");
debug("%sover-current condition exists\n",
(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
"" : "no ");
usb_hub_power_on(hub);
/*
* Reset any devices that may be in a bad state when applying
* the power. This is a __weak function. Resetting of the devices
* should occur in the board file of the device.
*/
for (i = 0; i < dev->maxchild; i++)
usb_hub_reset_devices(i + 1);
for (i = 0; i < dev->maxchild; i++) {
ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
unsigned short portstatus, portchange;
int ret;
ulong start = get_timer(0);
/*
* Wait for (whichever finishes first)
* - A maximum of 10 seconds
* This is a purely observational value driven by connecting
* a few broken pen drives and taking the max * 1.5 approach
* - connection_change and connection state to report same
* state
*/
do {
ret = usb_get_port_status(dev, i + 1, portsts);
if (ret < 0) {
debug("get_port_status failed\n");
break;
}
portstatus = le16_to_cpu(portsts->wPortStatus);
portchange = le16_to_cpu(portsts->wPortChange);
if ((portchange & USB_PORT_STAT_C_CONNECTION) ==
(portstatus & USB_PORT_STAT_CONNECTION))
break;
} while (get_timer(start) < CONFIG_SYS_HZ * 10);
if (ret < 0)
continue;
debug("Port %d Status %X Change %X\n",
i + 1, portstatus, portchange);
if (portchange & USB_PORT_STAT_C_CONNECTION) {
debug("port %d connection change\n", i + 1);
usb_hub_port_connect_change(dev, i);
}
if (portchange & USB_PORT_STAT_C_ENABLE) {
debug("port %d enable change, status %x\n",
i + 1, portstatus);
usb_clear_port_feature(dev, i + 1,
USB_PORT_FEAT_C_ENABLE);
/*
* The following hack causes a ghost device problem
* to Faraday EHCI
*/
#ifndef CONFIG_USB_EHCI_FARADAY
/* EM interference sometimes causes bad shielded USB
* devices to be shutdown by the hub, this hack enables
* them again. Works at least with mouse driver */
if (!(portstatus & USB_PORT_STAT_ENABLE) &&
(portstatus & USB_PORT_STAT_CONNECTION) &&
((dev->children[i]))) {
debug("already running port %i " \
"disabled by hub (EMI?), " \
"re-enabling...\n", i + 1);
usb_hub_port_connect_change(dev, i);
}
#endif
}
if (portstatus & USB_PORT_STAT_SUSPEND) {
debug("port %d suspend change\n", i + 1);
usb_clear_port_feature(dev, i + 1,
USB_PORT_FEAT_SUSPEND);
}
if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
debug("port %d over-current change\n", i + 1);
usb_clear_port_feature(dev, i + 1,
USB_PORT_FEAT_C_OVER_CURRENT);
usb_hub_power_on(hub);
}
if (portchange & USB_PORT_STAT_C_RESET) {
debug("port %d reset change\n", i + 1);
usb_clear_port_feature(dev, i + 1,
USB_PORT_FEAT_C_RESET);
}
} /* end for i all ports */
return 0;
}
static int usb_hub_configure(struct usb_device *dev)
{
unsigned char buffer[USB_BUFSIZ], *bitmap;
struct usb_hub_descriptor *descriptor;
struct usb_hub_status *hubsts;
int i;
struct usb_hub_device *hub;
hub = xzalloc(sizeof (*hub));
dev->hub = hub;
hub->pusb_dev = dev;
/* Get the the hub descriptor */
if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
dev_dbg(&dev->dev, "%s: failed to get hub " \
"descriptor, giving up %lX\n", __func__, dev->status);
return -1;
}
descriptor = (struct usb_hub_descriptor *)buffer;
/* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
i = descriptor->bLength;
if (i > USB_BUFSIZ) {
dev_dbg(&dev->dev, "%s: failed to get hub " \
"descriptor - too long: %d\n", __func__,
descriptor->bLength);
return -1;
}
if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
dev_dbg(&dev->dev, "%s: failed to get hub " \
"descriptor 2nd giving up %lX\n", __func__, dev->status);
return -1;
}
memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
/* adjust 16bit values */
hub->desc.wHubCharacteristics =
le16_to_cpu(descriptor->wHubCharacteristics);
/* set the bitmap */
bitmap = (unsigned char *)&hub->desc.u.hs.DeviceRemovable[0];
/* devices not removable by default */
memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
bitmap = (unsigned char *)&hub->desc.u.hs.PortPwrCtrlMask[0];
memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
hub->desc.u.hs.DeviceRemovable[i] = descriptor->u.hs.DeviceRemovable[i];
for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
hub->desc.u.hs.PortPwrCtrlMask[i] = descriptor->u.hs.PortPwrCtrlMask[i];
dev->maxchild = descriptor->bNbrPorts;
dev_dbg(&dev->dev, "%d ports detected\n", dev->maxchild);
switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
case 0x00:
dev_dbg(&dev->dev, "ganged power switching\n");
break;
case 0x01:
dev_dbg(&dev->dev, "individual port power switching\n");
break;
case 0x02:
case 0x03:
dev_dbg(&dev->dev, "unknown reserved power switching mode\n");
break;
}
if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
dev_dbg(&dev->dev, "part of a compound device\n");
else
dev_dbg(&dev->dev, "standalone hub\n");
switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
case 0x00:
dev_dbg(&dev->dev, "global over-current protection\n");
break;
case 0x08:
dev_dbg(&dev->dev, "individual port over-current protection\n");
break;
case 0x10:
case 0x18:
dev_dbg(&dev->dev, "no over-current protection\n");
break;
}
dev_dbg(&dev->dev, "power on to power good time: %dms\n",
descriptor->bPwrOn2PwrGood * 2);
dev_dbg(&dev->dev, "hub controller current requirement: %dmA\n",
descriptor->bHubContrCurrent);
for (i = 0; i < dev->maxchild; i++)
dev_dbg(&dev->dev, "port %d is%s removable\n", i + 1,
hub->desc.u.hs.DeviceRemovable[(i + 1) / 8] & \
(1 << ((i + 1) % 8)) ? " not" : "");
if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
dev_dbg(&dev->dev, "%s: failed to get Status - " \
"too long: %d\n", __func__, descriptor->bLength);
return -1;
}
if (usb_get_hub_status(dev, buffer) < 0) {
dev_dbg(&dev->dev, "%s: failed to get Status %lX\n", __func__,
dev->status);
return -1;
}
hubsts = (struct usb_hub_status *)buffer;
dev_dbg(&dev->dev, "get_hub_status returned status %X, change %X\n",
le16_to_cpu(hubsts->wHubStatus),
le16_to_cpu(hubsts->wHubChange));
dev_dbg(&dev->dev, "local power source is %s\n",
(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
"lost (inactive)" : "good");
dev_dbg(&dev->dev, "%sover-current condition exists\n",
(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
"" : "no ");
usb_hub_power_on(hub);
return 0;
}
static int usb_hub_configure_port(struct usb_device *dev, int port)
{
struct usb_port_status portsts;
unsigned short portstatus, portchange;
int connect_change = 0;
if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
dev_dbg(&dev->dev, "get_port_status failed\n");
return -EIO;
}
portstatus = le16_to_cpu(portsts.wPortStatus);
portchange = le16_to_cpu(portsts.wPortChange);
dev_dbg(&dev->dev, "Port %d Status %X Change %X\n",
port + 1, portstatus, portchange);
if (portchange & USB_PORT_STAT_C_CONNECTION) {
dev_dbg(&dev->dev, "port %d connection change\n", port + 1);
connect_change = 1;
}
if (portchange & USB_PORT_STAT_C_ENABLE) {
dev_dbg(&dev->dev, "port %d enable change, status %x\n",
port + 1, portstatus);
usb_clear_port_feature(dev, port + 1,
USB_PORT_FEAT_C_ENABLE);
/* EM interference sometimes causes bad shielded USB
* devices to be shutdown by the hub, this hack enables
* them again. Works at least with mouse driver */
if (!(portstatus & USB_PORT_STAT_ENABLE) &&
(portstatus & USB_PORT_STAT_CONNECTION) &&
((dev->children[port]))) {
dev_dbg(&dev->dev, "already running port %i " \
"disabled by hub (EMI?), " \
"re-enabling...\n", port + 1);
connect_change = 1;
}
}
if (connect_change)
usb_hub_port_connect_change(dev, port);
if (portstatus & USB_PORT_STAT_SUSPEND) {
dev_dbg(&dev->dev, "port %d suspend change\n", port + 1);
usb_clear_port_feature(dev, port + 1,
USB_PORT_FEAT_SUSPEND);
}
if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
dev_dbg(&dev->dev, "port %d over-current change\n", port + 1);
usb_clear_port_feature(dev, port + 1,
USB_PORT_FEAT_C_OVER_CURRENT);
usb_hub_power_on(dev->hub);
}
if (portchange & USB_PORT_STAT_C_RESET) {
dev_dbg(&dev->dev, "port %d reset change\n", port + 1);
usb_clear_port_feature(dev, port + 1,
USB_PORT_FEAT_C_RESET);
}
return 0;
}
int usb_hub_events(void)
{
USB_LIST_T *tmp;
USB_DEV_T *dev;
USB_HUB_T *hub;
USB_HUB_STATUS_T hubsts;
uint16_t hubchange;
uint16_t irq_data;
int i, ret;
//printf("0x%x 0x%x\n", *(uint32_t *)0x40009054, *(uint32_t *)0x40009058);
if(list_empty(&_HubEventList))
return 0;
/*
* We restart the list everytime to avoid a deadlock with
* deleting hubs downstream from this one. This should be
* safe since we delete the hub from the event list.
* Not the most efficient, but avoids deadlocks.
*/
while(1)
{
if(list_empty(&_HubEventList))
break;
/* Grab the next entry from the beginning of the list */
tmp = _HubEventList.next;
hub = list_entry(tmp, USB_HUB_T, event_list);
dev = hub->dev;
list_del(tmp);
INIT_LIST_HEAD(tmp);
if(hub->error)
{
USB_error("hub error %d!!\n", hub->error);
}
/* added by YCHuang */
if(hub->urb->transfer_buffer_length == 1)
irq_data = *(uint8_t *)hub->urb->transfer_buffer;
else
{
/* BIGBIG */
//irq_data = *(uint16_t *)hub->urb->transfer_buffer; /* FIX DEBUG, not verified */
irq_data = (*((uint8_t *)hub->urb->transfer_buffer + 1) << 8) |
*(uint8_t *)hub->urb->transfer_buffer;
}
for(i = 0; i < hub->descriptor.bNbrPorts; i++)
{
USB_PORT_STATUS_T portsts;
uint16_t portstatus, portchange;
if(!((irq_data >> (i + 1)) & 0x01))
continue;
USB_info("usb_hub_events - hub:%d, get port status...\n", hub->dev->devnum);
ret = usb_get_port_status(dev, i + 1, &portsts);
if(ret < 0)
{
USB_error("Error - get_hub %d port %d status failed (err = %d)\n", hub->dev->devnum, i + 1, ret);
continue;
}
portstatus = portsts.wPortStatus;
portchange = portsts.wPortChange;
USB_debug("port %d, portstatus = %x, portchange = %x\n", i, portstatus, portchange);
if(portchange & USB_PORT_STAT_C_CONNECTION)
{
USB_info("port %d of hub %d connection change\n", i + 1, hub->dev->devnum);
usb_hub_port_connect_change(hub, dev, i, &portsts);
}
else if(portchange & USB_PORT_STAT_C_ENABLE)
{
USB_info("port %d of hub %d enable change, status %x\n", i + 1, portstatus, hub->dev->devnum);
usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_ENABLE);
/*
* EM interference sometimes causes bad shielded USB
* devices to be shutdown by the hub, this hack enables
* them again. Works at least with mouse driver.
*/
if(!(portstatus & USB_PORT_STAT_ENABLE) &&
(portstatus & USB_PORT_STAT_CONNECTION) &&
(dev->children[i]))
{
USB_error("Error - already running port %i disabled by hub (EMI?), re-enabling...\n", i + 1);
usb_hub_port_connect_change(hub, dev, i, &portsts);
}
}
if(portchange & USB_PORT_STAT_C_SUSPEND)
{
USB_info("port %d of hub %d suspend change\n", i + 1, hub->dev->devnum);
usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_SUSPEND);
}
if(portchange & USB_PORT_STAT_C_OVERCURRENT)
{
USB_warning("!! port %d of hub %d over-current change\n", i + 1, hub->dev->devnum);
usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_OVER_CURRENT);
usb_hub_power_on(hub);
}
if(portchange & USB_PORT_STAT_C_RESET)
{
USB_info("port %d of hub %d reset change\n", i + 1, hub->dev->devnum);
usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET);
}
} /* end for i */
/* deal with hub status changes */
if (usb_get_hub_status(dev, &hubsts) < 0)
USB_error("Error - get_hub_status failed\n");
else
{
//hubstatus = USB_SWAP16(hubsts.wHubStatus);
hubchange = USB_SWAP16(hubsts.wHubChange);
if(hubchange & HUB_CHANGE_LOCAL_POWER)
{
USB_debug("hub power change\n");
usb_clear_hub_feature(dev, C_HUB_LOCAL_POWER);
}
if(hubchange & HUB_CHANGE_OVERCURRENT)
{
USB_error("!!hub overcurrent change\n");
usbh_mdelay(500); /* Cool down */
usb_clear_hub_feature(dev, C_HUB_OVER_CURRENT);
usb_hub_power_on(hub);
}
}
} /* end while (1) */
return 1;
}
static int usb_hub_configure(USB_HUB_T *hub, EP_INFO_T *ep_info)
{
USB_DEV_T *dev = hub->dev;
USB_HUB_STATUS_T hubstatus;
uint32_t pipe;
int maxp, ret;
USB_info("[HUB] Enter usb_hub_configure()... hub:%d\n", hub->dev->devnum);
/* Request the entire hub descriptor. */
ret = usb_get_hub_descriptor(dev, &hub->descriptor, sizeof(USB_HUB_DESC_T));
/* <hub->descriptor> is large enough for a hub with 127 ports;
* the hub can/will return fewer bytes here. */
if(ret < 0)
{
USB_error("Erro - Unable to get hub descriptor (err = %d)\n", ret);
return ret;
}
dev->maxchild = hub->descriptor.bNbrPorts;
#ifdef USB_VERBOSE_DEBUG
USB_info("%d port%s detected\n", hub->descriptor.bNbrPorts, (hub->descriptor.bNbrPorts == 1) ? "" : "s");
/* D2: Identifying a Compound Device */
if(hub->descriptor.wHubCharacteristics & HUB_CHAR_COMPOUND)
{
USB_info("part of a compound device\n");
}
else
{
USB_info("standalone hub\n");
}
/* D1..D0: Logical Power Switching Mode */
switch(hub->descriptor.wHubCharacteristics & HUB_CHAR_LPSM)
{
case 0x00:
USB_info("ganged power switching\n");
break;
case 0x01:
USB_info("individual port power switching\n");
break;
case 0x02:
case 0x03:
USB_info("unknown reserved power switching mode\n");
break;
}
/* D4..D3: Over-current Protection Mode */
switch(hub->descriptor.wHubCharacteristics & HUB_CHAR_OCPM)
{
case 0x00:
USB_info("global over-current protection\n");
break;
case 0x08:
USB_info("individual port over-current protection\n");
break;
case 0x10:
case 0x18:
USB_info("no over-current protection\n");
break;
}
switch(dev->descriptor.bDeviceProtocol)
{
case 0:
break;
case 1:
USB_debug("Single TT, ");
break;
case 2:
USB_debug("TT per port, ");
break;
default:
USB_debug("Unrecognized hub protocol %d", dev->descriptor.bDeviceProtocol);
break;
}
USB_info("power on to power good time: %dms\n", hub->descriptor.bPwrOn2PwrGood * 2);
USB_info("hub controller current requirement: %dmA\n", hub->descriptor.bHubContrCurrent);
#endif
ret = usb_get_hub_status(dev, &hubstatus);
if(ret < 0)
{
USB_error("Unable to get hub %d status (err = %d)\n", hub->dev->devnum, ret);
return ret;
}
hubstatus.wHubStatus = USB_SWAP16(hubstatus.wHubStatus);
#ifdef USB_VERBOSE_DEBUG
/* Hub status bit 0, Local Power Source */
if(hubstatus.wHubStatus & HUB_STATUS_LOCAL_POWER)
{
USB_info("local power source is lost (inactive)\n");
}
else
{
USB_info("local power source is good\n");
}
/* Hub status bit 1, Over-current Indicator */
if(hubstatus.wHubStatus & HUB_STATUS_OVERCURRENT)
{
USB_info("!! over-current\n");
}
else
{
USB_info("No over-current.\n");
}
#endif
/* Start the interrupt endpoint */
pipe = usb_rcvintpipe(dev, ep_info->bEndpointAddress);
maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
if(maxp > sizeof(hub->buffer))
maxp = sizeof(hub->buffer);
hub->urb = USBH_AllocUrb();
if(!hub->urb)
{
USB_error("Error - couldn't allocate interrupt urb");
return USB_ERR_NOMEM;
}
#if 1 /* YCHuang 2012.06.01 */
if(ep_info->bInterval < 16)
ep_info->bInterval = 16;
#endif
FILL_INT_URB(hub->urb, dev, pipe, hub->buffer, maxp, hub_irq,
hub, ep_info->bInterval);
ret = USBH_SubmitUrb(hub->urb);
if(ret)
{
USB_error("Error - USBH_SubmitUrb failed (%d)", ret);
USBH_FreeUrb(hub->urb);
return ret;
}
if(g_ohci_bus.root_hub != hub->dev)
usb_hub_power_on(hub);
return 0;
}
static int usb_hub_configure(struct usb_device *dev)
{
int i;
ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ);
unsigned char *bitmap;
short hubCharacteristics;
struct usb_hub_descriptor *descriptor;
struct usb_hub_device *hub;
#ifdef USB_HUB_DEBUG
struct usb_hub_status *hubsts;
#endif
/* "allocate" Hub device */
hub = usb_hub_allocate();
if (hub == NULL)
return -1;
hub->pusb_dev = dev;
/* Get the the hub descriptor */
if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
"descriptor, giving up %lX\n", dev->status);
return -1;
}
descriptor = (struct usb_hub_descriptor *)buffer;
/* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
i = descriptor->bLength;
if (i > USB_BUFSIZ) {
USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
"descriptor - too long: %d\n",
descriptor->bLength);
return -1;
}
if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
"descriptor 2nd giving up %lX\n", dev->status);
return -1;
}
memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
/* adjust 16bit values */
put_unaligned(le16_to_cpu(get_unaligned(
&descriptor->wHubCharacteristics)),
&hub->desc.wHubCharacteristics);
/* set the bitmap */
bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
/* devices not removable by default */
memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];
dev->maxchild = descriptor->bNbrPorts;
USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics);
switch (hubCharacteristics & HUB_CHAR_LPSM) {
case 0x00:
USB_HUB_PRINTF("ganged power switching\n");
break;
case 0x01:
USB_HUB_PRINTF("individual port power switching\n");
break;
case 0x02:
case 0x03:
USB_HUB_PRINTF("unknown reserved power switching mode\n");
break;
}
if (hubCharacteristics & HUB_CHAR_COMPOUND)
USB_HUB_PRINTF("part of a compound device\n");
else
USB_HUB_PRINTF("standalone hub\n");
switch (hubCharacteristics & HUB_CHAR_OCPM) {
case 0x00:
USB_HUB_PRINTF("global over-current protection\n");
break;
case 0x08:
USB_HUB_PRINTF("individual port over-current protection\n");
break;
case 0x10:
case 0x18:
USB_HUB_PRINTF("no over-current protection\n");
break;
}
USB_HUB_PRINTF("power on to power good time: %dms\n",
descriptor->bPwrOn2PwrGood * 2);
USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
descriptor->bHubContrCurrent);
for (i = 0; i < dev->maxchild; i++)
USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
hub->desc.DeviceRemovable[(i + 1) / 8] & \
(1 << ((i + 1) % 8)) ? " not" : "");
if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \
"too long: %d\n", descriptor->bLength);
return -1;
}
if (usb_get_hub_status(dev, buffer) < 0) {
USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",
dev->status);
return -1;
}
#ifdef USB_HUB_DEBUG
hubsts = (struct usb_hub_status *)buffer;
#endif
USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
le16_to_cpu(hubsts->wHubStatus),
le16_to_cpu(hubsts->wHubChange));
USB_HUB_PRINTF("local power source is %s\n",
(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
"lost (inactive)" : "good");
USB_HUB_PRINTF("%sover-current condition exists\n",
(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
"" : "no ");
usb_hub_power_on(hub);
for (i = 0; i < dev->maxchild; i++) {
ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
unsigned short portstatus, portchange;
int ret;
ulong start = get_timer(0);
/*
* Wait for (whichever finishes first)
* - A maximum of 10 seconds
* This is a purely observational value driven by connecting
* a few broken pen drives and taking the max * 1.5 approach
* - connection_change and connection state to report same
* state
*/
do {
ret = usb_get_port_status(dev, i + 1, portsts);
if (ret < 0) {
USB_HUB_PRINTF("get_port_status failed\n");
break;
}
portstatus = le16_to_cpu(portsts->wPortStatus);
portchange = le16_to_cpu(portsts->wPortChange);
#ifdef CONFIG_MARVELL
/* - USB3.0 issue with Avanta-LP/Armada-375:
* If usb device was already connected before detection ('usb start'),
* port connect status bit is set (USB_PORT_STAT_CONNECTION),
* but port connect status change bit (USB_PORT_STAT_C_CONNECTION) is not set.
* - Added WA (aligned with kernel driver): instead of checking port change status,
* to be satisfied with checking USB_PORT_STAT_CONNECTION Bit on portstatus only" */
if (((portchange & USB_PORT_STAT_C_CONNECTION) ==
(portstatus & USB_PORT_STAT_CONNECTION)) ||
(portstatus & USB_PORT_STAT_CONNECTION))
#else
if ((portchange & USB_PORT_STAT_C_CONNECTION) ==
(portstatus & USB_PORT_STAT_CONNECTION))
#endif
break;
mdelay(100);
} while (get_timer(start) < CONFIG_SYS_HZ * 10);
if (ret < 0)
continue;
USB_HUB_PRINTF("Port %d Status %X Change %X\n",
i + 1, portstatus, portchange);
#ifdef CONFIG_MARVELL
/* - USB3.0 issue with Avanta-LP/Armada-375:
* If usb device was already connected before detection ('usb start'),
* port connect status bit is set (USB_PORT_STAT_CONNECTION),
* but port connect status change bit (USB_PORT_STAT_C_CONNECTION) is not set.
* - Added WA (aligned with kernel driver): instead of checking port change status,
* to be satisfied with checking USB_PORT_STAT_CONNECTION Bit on portstatus only" */
if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
(portstatus & USB_PORT_STAT_CONNECTION)) {
#else
if (portchange & USB_PORT_STAT_C_CONNECTION) {
#endif
USB_HUB_PRINTF("port %d connection change\n", i + 1);
usb_hub_port_connect_change(dev, i);
}
if (portchange & USB_PORT_STAT_C_ENABLE) {
USB_HUB_PRINTF("port %d enable change, status %x\n",
i + 1, portstatus);
usb_clear_port_feature(dev, i + 1,
USB_PORT_FEAT_C_ENABLE);
/* EM interference sometimes causes bad shielded USB
* devices to be shutdown by the hub, this hack enables
* them again. Works at least with mouse driver */
if (!(portstatus & USB_PORT_STAT_ENABLE) &&
(portstatus & USB_PORT_STAT_CONNECTION) &&
((dev->children[i]))) {
USB_HUB_PRINTF("already running port %i " \
"disabled by hub (EMI?), " \
"re-enabling...\n", i + 1);
usb_hub_port_connect_change(dev, i);
}
}
if (portstatus & USB_PORT_STAT_SUSPEND) {
USB_HUB_PRINTF("port %d suspend change\n", i + 1);
usb_clear_port_feature(dev, i + 1,
USB_PORT_FEAT_SUSPEND);
}
if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
USB_HUB_PRINTF("port %d over-current change\n", i + 1);
usb_clear_port_feature(dev, i + 1,
USB_PORT_FEAT_C_OVER_CURRENT);
usb_hub_power_on(hub);
}
if (portchange & USB_PORT_STAT_C_RESET) {
USB_HUB_PRINTF("port %d reset change\n", i + 1);
usb_clear_port_feature(dev, i + 1,
USB_PORT_FEAT_C_RESET);
}
} /* end for i all ports */
return 0;
}
int usb_hub_probe(struct usb_device *dev, int ifnum)
{
struct usb_interface *iface;
struct usb_endpoint_descriptor *ep;
int ret;
iface = &dev->config.if_desc[ifnum];
/* Is it a hub? */
if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
return 0;
/* Some hubs have a subclass of 1, which AFAICT according to the */
/* specs is not defined, but it works */
if ((iface->desc.bInterfaceSubClass != 0) &&
(iface->desc.bInterfaceSubClass != 1))
return 0;
/* Multiple endpoints? What kind of mutant ninja-hub is this? */
if (iface->desc.bNumEndpoints != 1)
return 0;
ep = &iface->ep_desc[0];
/* Output endpoint? Curiousier and curiousier.. */
if (!(ep->bEndpointAddress & USB_DIR_IN))
return 0;
/* If it's not an interrupt endpoint, we'd better punt! */
if ((ep->bmAttributes & 3) != 3)
return 0;
/* We found a hub */
USB_HUB_PRINTF("USB hub found\n");
ret = usb_hub_configure(dev);
return ret;
}
int usb_hub_configure(struct usb_device *dev)
{
int i;
ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ);
unsigned char *bitmap;
struct usb_hub_descriptor *descriptor;
struct usb_hub_device *hub;
#ifdef USB_HUB_DEBUG
struct usb_hub_status *hubsts;
#endif
/* "allocate" Hub device */
hub = usb_hub_allocate();
if (hub == NULL)
return -1;
hub->pusb_dev = dev;
/* Get the the hub descriptor */
if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
"descriptor, giving up %lX\n", dev->status);
return -1;
}
descriptor = (struct usb_hub_descriptor *)buffer;
/* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
i = descriptor->bLength;
if (i > USB_BUFSIZ) {
USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
"descriptor - too long: %d\n",
descriptor->bLength);
return -1;
}
if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
"descriptor 2nd giving up %lX\n", dev->status);
return -1;
}
memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
/* adjust 16bit values */
hub->desc.wHubCharacteristics =
le16_to_cpu(descriptor->wHubCharacteristics);
/* set the bitmap */
bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
/* devices not removable by default */
memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];
dev->maxchild = descriptor->bNbrPorts;
USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
case 0x00:
USB_HUB_PRINTF("ganged power switching\n");
break;
case 0x01:
USB_HUB_PRINTF("individual port power switching\n");
break;
case 0x02:
case 0x03:
USB_HUB_PRINTF("unknown reserved power switching mode\n");
break;
}
if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
USB_HUB_PRINTF("part of a compound device\n");
else
USB_HUB_PRINTF("standalone hub\n");
switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
case 0x00:
USB_HUB_PRINTF("global over-current protection\n");
break;
case 0x08:
USB_HUB_PRINTF("individual port over-current protection\n");
break;
case 0x10:
case 0x18:
USB_HUB_PRINTF("no over-current protection\n");
break;
}
USB_HUB_PRINTF("power on to power good time: %dms\n",
descriptor->bPwrOn2PwrGood * 2);
USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
descriptor->bHubContrCurrent);
for (i = 0; i < dev->maxchild; i++)
USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
hub->desc.DeviceRemovable[(i + 1) / 8] & \
(1 << ((i + 1) % 8)) ? " not" : "");
if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \
"too long: %d\n", descriptor->bLength);
return -1;
}
if (usb_get_hub_status(dev, buffer) < 0) {
USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",
dev->status);
return -1;
}
#ifdef USB_HUB_DEBUG
hubsts = (struct usb_hub_status *)buffer;
#endif
USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
le16_to_cpu(hubsts->wHubStatus),
le16_to_cpu(hubsts->wHubChange));
USB_HUB_PRINTF("local power source is %s\n",
(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
"lost (inactive)" : "good");
USB_HUB_PRINTF("%sover-current condition exists\n",
(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
"" : "no ");
usb_hub_power_on(hub);
for (i = 0; i < dev->maxchild; i++) {
ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
unsigned short portstatus, portchange;
if (usb_get_port_status(dev, i + 1, portsts) < 0) {
USB_HUB_PRINTF("get_port_status failed\n");
continue;
}
portstatus = le16_to_cpu(portsts->wPortStatus);
portchange = le16_to_cpu(portsts->wPortChange);
USB_HUB_PRINTF("Port %d Status %X Change %X\n",
i + 1, portstatus, portchange);
if (portchange & USB_PORT_STAT_C_CONNECTION) {
USB_HUB_PRINTF("port %d connection change\n", i + 1);
usb_hub_port_connect_change(dev, i);
}
if (portchange & USB_PORT_STAT_C_ENABLE) {
USB_HUB_PRINTF("port %d enable change, status %x\n",
i + 1, portstatus);
usb_clear_port_feature(dev, i + 1,
USB_PORT_FEAT_C_ENABLE);
/* EM interference sometimes causes bad shielded USB
* devices to be shutdown by the hub, this hack enables
* them again. Works at least with mouse driver */
if (!(portstatus & USB_PORT_STAT_ENABLE) &&
(portstatus & USB_PORT_STAT_CONNECTION) &&
((dev->children[i]))) {
USB_HUB_PRINTF("already running port %i " \
"disabled by hub (EMI?), " \
"re-enabling...\n", i + 1);
usb_hub_port_connect_change(dev, i);
}
}
if (portstatus & USB_PORT_STAT_SUSPEND) {
USB_HUB_PRINTF("port %d suspend change\n", i + 1);
usb_clear_port_feature(dev, i + 1,
USB_PORT_FEAT_SUSPEND);
}
if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
USB_HUB_PRINTF("port %d over-current change\n", i + 1);
usb_clear_port_feature(dev, i + 1,
USB_PORT_FEAT_C_OVER_CURRENT);
usb_hub_power_on(hub);
}
if (portchange & USB_PORT_STAT_C_RESET) {
USB_HUB_PRINTF("port %d reset change\n", i + 1);
usb_clear_port_feature(dev, i + 1,
USB_PORT_FEAT_C_RESET);
}
} /* end for i all ports */
return 0;
}