static int usb_hub_port_status(struct usb_device *hub, int port,
u16 *status, u16 *change)
{
struct usb_port_status *portsts;
int ret = -ENOMEM;
portsts = kmalloc(sizeof(*portsts), GFP_KERNEL);
if (portsts) {
ret = usb_get_port_status(hub, port + 1, portsts);
if (ret < 0)
err("%s (%d) failed (err = %d)", __FUNCTION__, hub->devnum, ret);
else {
*status = le16_to_cpu(portsts->wPortStatus);
*change = le16_to_cpu(portsts->wPortChange);
dbg("port %d, portstatus %x, change %x, %s", port + 1,
*status, *change, portspeed(*status));
//info("<usb_hub_port_status>:port %d, portstatus %x, change %x, %s", port + 1,
// *status, *change, portspeed(*status));
ret = 0;
}
kfree(portsts);
}
return ret;
}
void usb_hub_port_connect_change(struct usb_device *dev, int port)
{
struct usb_device *usb;
ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
unsigned short portstatus;
/* Check status */
if (usb_get_port_status(dev, port + 1, portsts) < 0) {
USB_HUB_PRINTF("get_port_status failed\n");
return;
}
portstatus = le16_to_cpu(portsts->wPortStatus);
USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
portstatus,
le16_to_cpu(portsts->wPortChange),
portspeed(portstatus));
/* Clear the connection change status */
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
/* Disconnect any existing devices under this port */
if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
(!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
/* Return now if nothing is connected */
if (!(portstatus & USB_PORT_STAT_CONNECTION))
return;
}
/* Reset the port */
if (hub_port_reset(dev, port, &portstatus) < 0) {
printf("cannot reset port %i!?\n", port + 1);
return;
}
/* Allocate a new device struct for it */
usb = usb_alloc_new_device(dev->controller);
if (portstatus & USB_PORT_STAT_HIGH_SPEED)
usb->speed = USB_SPEED_HIGH;
else if (portstatus & USB_PORT_STAT_LOW_SPEED)
usb->speed = USB_SPEED_LOW;
else
usb->speed = USB_SPEED_FULL;
dev->children[port] = usb;
usb->parent = dev;
usb->portnr = port + 1;
/* Run it through the hoops (find a driver, etc) */
if (usb_new_device(usb)) {
/* Woops, disable the port */
usb_free_device();
dev->children[port] = NULL;
USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
}
}
static void usb_hub_power_on(struct usb_hub_device *hub)
{
int i;
struct usb_device *dev;
unsigned pgood_delay = hub->desc.bPwrOn2PwrGood * 2;
ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
unsigned short portstatus;
int ret;
dev = hub->pusb_dev;
/*
* Enable power to the ports:
* Here we Power-cycle the ports: aka,
* turning them off and turning on again.
*/
debug("enabling power on all ports\n");
for (i = 0; i < dev->maxchild; i++) {
usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
debug("port %d returns %lX\n", i + 1, dev->status);
}
/* Wait at least 2*bPwrOn2PwrGood for PP to change */
mdelay(pgood_delay);
for (i = 0; i < dev->maxchild; i++) {
ret = usb_get_port_status(dev, i + 1, portsts);
if (ret < 0) {
debug("port %d: get_port_status failed\n", i + 1);
return;
}
/*
* Check to confirm the state of Port Power:
* xHCI says "After modifying PP, s/w shall read
* PP and confirm that it has reached the desired state
* before modifying it again, undefined behavior may occur
* if this procedure is not followed".
* EHCI doesn't say anything like this, but no harm in keeping
* this.
*/
portstatus = le16_to_cpu(portsts->wPortStatus);
if (portstatus & (USB_PORT_STAT_POWER << 1)) {
debug("port %d: Port power change failed\n", i + 1);
return;
}
}
for (i = 0; i < dev->maxchild; i++) {
usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
debug("port %d returns %lX\n", i + 1, dev->status);
}
/* Wait for power to become stable */
mdelay(max(pgood_delay, CONFIG_USB_HUB_MIN_POWER_ON_DELAY));
}
int hub_port_reset(struct usb_device *dev, int port,
unsigned short *portstat)
{
int tries;
struct usb_port_status portsts;
unsigned short portstatus, portchange;
dev_dbg(&dev->dev, "hub_port_reset: resetting port %d...\n", port);
for (tries = 0; tries < MAX_TRIES; tries++) {
usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
mdelay(200);
if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
dev_dbg(&dev->dev, "get_port_status failed status %lX\n",
dev->status);
return -1;
}
portstatus = le16_to_cpu(portsts.wPortStatus);
portchange = le16_to_cpu(portsts.wPortChange);
dev_dbg(&dev->dev, "portstatus %x, change %x, %s\n",
portstatus, portchange,
portspeed(portstatus));
dev_dbg(&dev->dev, "STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
" USB_PORT_STAT_ENABLE %d\n",
(portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
(portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
(portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
!(portstatus & USB_PORT_STAT_CONNECTION))
return -1;
if (portstatus & USB_PORT_STAT_ENABLE)
break;
mdelay(200);
}
if (tries == MAX_TRIES) {
dev_dbg(&dev->dev, "Cannot enable port %i after %i retries, " \
"disabling port.\n", port + 1, MAX_TRIES);
dev_dbg(&dev->dev, "Maybe the USB cable is bad?\n");
return -1;
}
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
*portstat = portstatus;
return 0;
}
/* return: -1 on error, 0 on success, 1 on disconnect. */
static int usb_hub_port_wait_reset(struct usb_device *hub, int port,
struct usb_device *dev, unsigned int delay)
{
int delay_time, ret;
struct usb_port_status portsts;
unsigned short portchange, portstatus;
for (delay_time = 0; delay_time < HUB_RESET_TIMEOUT; delay_time += delay) {
/* wait to give the device a chance to reset */
wait_ms(delay);
/* read and decode port status */
ret = usb_get_port_status(hub, port + 1, &portsts);
if (ret < 0) {
err("get_port_status(%d) failed (err = %d)", port + 1, ret);
return -1;
}
portstatus = le16_to_cpu(portsts.wPortStatus);
portchange = le16_to_cpu(portsts.wPortChange);
dbg("port %d, portstatus %x, change %x, %s", port + 1,
portstatus, portchange, portspeed (portstatus));
/* bomb out completely if something weird happened */
if ((portchange & USB_PORT_STAT_C_CONNECTION))
return -1;
/* if we`ve finished resetting, then break out of the loop */
if (!(portstatus & USB_PORT_STAT_RESET) &&
(portstatus & USB_PORT_STAT_ENABLE)) {
if (portstatus & USB_PORT_STAT_HIGH_SPEED)
dev->speed = USB_SPEED_HIGH;
else if (portstatus & USB_PORT_STAT_LOW_SPEED)
dev->speed = USB_SPEED_LOW;
else
dev->speed = USB_SPEED_FULL;
return 0;
}
/* switch to the long delay after two short delay failures */
if (delay_time >= 2 * HUB_SHORT_RESET_TIME)
delay = HUB_LONG_RESET_TIME;
dbg("port %d of hub %d not reset yet, waiting %dms", port + 1,
hub->devnum, delay);
}
return -1;
}
static int hub_port_wait_reset(struct usb_device *dev, int port,
unsigned int delay, unsigned short *portstatus_ret)
{
int delay_time, ret;
ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
unsigned short portstatus, portchange;
for (delay_time = 0;
delay_time < HUB_RESET_TIMEOUT;
delay_time += delay) {
/* wait to give the device a chance to reset */
mdelay(delay);
/* read and decode port status */
ret = usb_get_port_status(dev, port + 1, portsts);
if (ret < 0) {
USB_HUB_PRINTF("get_port_status failed status %lX\n",
dev->status);
return ret;
}
portstatus = le16_to_cpu(portsts->wPortStatus);
portchange = le16_to_cpu(portsts->wPortChange);
/* Device went away? */
if (!(portstatus & USB_PORT_STAT_CONNECTION))
return -ENOTCONN;
/* bomb out completely if the connection bounced */
if ((portchange & USB_PORT_STAT_C_CONNECTION))
return -ENOTCONN;
/* if we`ve finished resetting, then break out of the loop */
if (!(portstatus & USB_PORT_STAT_RESET) &&
(portstatus & USB_PORT_STAT_ENABLE)) {
*portstatus_ret = portstatus;
return 0;
}
/* switch to the long delay after two short delay failures */
if (delay_time >= 2 * HUB_SHORT_RESET_TIME)
delay = HUB_LONG_RESET_TIME;
USB_HUB_PRINTF(
"port %d not reset yet, waiting %dms\n",
port, delay);
}
return -1;
}
/******************************************************************************
* Detect if a USB device has been plugged or unplugged.
*/
int usb_detect_change(void)
{
int i, j;
int change = 0;
for (j = 0; j < USB_MAX_DEVICE; j++) {
for (i = 0; i < usb_dev[j].maxchild; i++) {
struct usb_port_status status;
if (usb_get_port_status(&usb_dev[j], i + 1,
&status) < 0)
/* USB request failed */
continue;
if (le16_to_cpu(status.wPortChange) &
USB_PORT_STAT_C_CONNECTION)
change++;
}
}
return change;
}
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;
}
int hub_port_reset(struct usb_device *dev, int port,
unsigned short *portstat)
{
int tries;
ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
unsigned short portstatus, portchange;
debug("hub_port_reset: resetting port %d...\n", port);
for (tries = 0; tries < MAX_TRIES; tries++) {
usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
mdelay(200);
if (usb_get_port_status(dev, port + 1, portsts) < 0) {
debug("get_port_status failed status %lX\n",
dev->status);
return -1;
}
portstatus = le16_to_cpu(portsts->wPortStatus);
portchange = le16_to_cpu(portsts->wPortChange);
debug("portstatus %x, change %x, %s\n", portstatus, portchange,
portspeed(portstatus));
debug("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
" USB_PORT_STAT_ENABLE %d\n",
(portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
(portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
(portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
/*
* Perhaps we should check for the following here:
* - C_CONNECTION hasn't been set.
* - CONNECTION is still set.
*
* Doing so would ensure that the device is still connected
* to the bus, and hasn't been unplugged or replaced while the
* USB bus reset was going on.
*
* However, if we do that, then (at least) a San Disk Ultra
* USB 3.0 16GB device fails to reset on (at least) an NVIDIA
* Tegra Jetson TK1 board. For some reason, the device appears
* to briefly drop off the bus when this second bus reset is
* executed, yet if we retry this loop, it'll eventually come
* back after another reset or two.
*/
if (portstatus & USB_PORT_STAT_ENABLE)
break;
mdelay(200);
}
if (tries == MAX_TRIES) {
debug("Cannot enable port %i after %i retries, " \
"disabling port.\n", port + 1, MAX_TRIES);
debug("Maybe the USB cable is bad?\n");
return -1;
}
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
*portstat = portstatus;
return 0;
}
int usb_hub_port_connect_change(struct usb_device *dev, int port)
{
ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
unsigned short portstatus;
int ret, speed;
/* Check status */
ret = usb_get_port_status(dev, port + 1, portsts);
if (ret < 0) {
debug("get_port_status failed\n");
return ret;
}
portstatus = le16_to_cpu(portsts->wPortStatus);
debug("portstatus %x, change %x, %s\n",
portstatus,
le16_to_cpu(portsts->wPortChange),
portspeed(portstatus));
/* Clear the connection change status */
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
/* Disconnect any existing devices under this port */
if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
(!(portstatus & USB_PORT_STAT_ENABLE))) ||
usb_device_has_child_on_port(dev, port)) {
debug("usb_disconnect(&hub->children[port]);\n");
/* Return now if nothing is connected */
if (!(portstatus & USB_PORT_STAT_CONNECTION))
return -ENOTCONN;
}
mdelay(200);
/* Reset the port */
ret = legacy_hub_port_reset(dev, port, &portstatus);
if (ret < 0) {
if (ret != -ENXIO)
printf("cannot reset port %i!?\n", port + 1);
return ret;
}
mdelay(200);
switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
case USB_PORT_STAT_SUPER_SPEED:
speed = USB_SPEED_SUPER;
break;
case USB_PORT_STAT_HIGH_SPEED:
speed = USB_SPEED_HIGH;
break;
case USB_PORT_STAT_LOW_SPEED:
speed = USB_SPEED_LOW;
break;
default:
speed = USB_SPEED_FULL;
break;
}
#ifdef CONFIG_DM_USB
struct udevice *child;
ret = usb_scan_device(dev->dev, port + 1, speed, &child);
#else
struct usb_device *usb;
ret = usb_alloc_new_device(dev->controller, &usb);
if (ret) {
printf("cannot create new device: ret=%d", ret);
return ret;
}
dev->children[port] = usb;
usb->speed = speed;
usb->parent = dev;
usb->portnr = port + 1;
/* Run it through the hoops (find a driver, etc) */
ret = usb_new_device(usb);
if (ret < 0) {
/* Woops, disable the port */
usb_free_device(dev->controller);
dev->children[port] = NULL;
}
#endif
if (ret < 0) {
debug("hub: disabling port %d\n", port + 1);
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
}
return ret;
}
static void usb_hub_port_connect_change(struct usb_device *dev, int port)
{
struct usb_device *usb;
struct usb_port_status portsts;
unsigned short portstatus, portchange;
/* Check status */
if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
dev_dbg(&dev->dev, "get_port_status failed\n");
return;
}
portstatus = le16_to_cpu(portsts.wPortStatus);
portchange = le16_to_cpu(portsts.wPortChange);
dev_dbg(&dev->dev, "portstatus %x, change %x, %s\n",
portstatus, portchange, portspeed(portstatus));
/* Clear the connection change status */
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
/* Disconnect any existing devices under this port */
if (dev->children[port] && !(portstatus & USB_PORT_STAT_CONNECTION)) {
dev_dbg(&dev->dev, "disconnect detected on port %d\n", port + 1);
usb_remove_device(dev->children[port]);
if (!dev->parent && dev->host->usbphy)
usb_phy_notify_disconnect(dev->host->usbphy, dev->speed);
return;
}
/* Remove disabled but connected devices */
if (dev->children[port] && !(portstatus & USB_PORT_STAT_ENABLE))
usb_remove_device(dev->children[port]);
mdelay(200);
/* Reset the port */
if (hub_port_reset(dev, port, &portstatus) < 0) {
dev_warn(&dev->dev, "cannot reset port %i!?\n", port + 1);
return;
}
mdelay(200);
/* Allocate a new device struct for it */
usb = usb_alloc_new_device();
usb->dev.parent = &dev->dev;
usb->host = dev->host;
if (portstatus & USB_PORT_STAT_HIGH_SPEED)
usb->speed = USB_SPEED_HIGH;
else if (portstatus & USB_PORT_STAT_LOW_SPEED)
usb->speed = USB_SPEED_LOW;
else
usb->speed = USB_SPEED_FULL;
dev->children[port] = usb;
usb->parent = dev;
usb->portnr = port + 1;
/* Run it through the hoops (find a driver, etc) */
if (usb_new_device(usb)) {
/* Woops, disable the port */
dev_dbg(&dev->dev, "hub: disabling port %d\n", port + 1);
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
usb_free_device(usb);
return;
}
if (!dev->parent && dev->host->usbphy)
usb_phy_notify_connect(dev->host->usbphy, usb->speed);
device_detect(&usb->dev);
}
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_port_wait_reset(USB_DEV_T *hub, int port,
USB_DEV_T *dev, uint32_t delay)
{
int delay_time, ret;
uint16_t portchange, portstatus;
USB_PORT_STATUS_T portsts;
for (delay_time = 0; delay_time < HUB_RESET_TIMEOUT; delay_time += delay)
{
/* wait to give the device a chance to reset */
usbh_mdelay(delay);
/* read and decode port status */
ret = usb_get_port_status(hub, port + 1, &portsts);
if(ret < 0)
{
USB_error("Error - get_port_status(%d) failed (err = %d)\n", port + 1, ret);
return -1;
}
portstatus = portsts.wPortStatus;
portchange = portsts.wPortChange;
USB_info("port %d of hub %d, portstatus %x, change %x, %s\n", port + 1, hub->devnum,
portstatus, portchange,
portstatus & (1 << USB_PORT_FEAT_LOWSPEED) ? "1.5 Mb/s" : "12 Mb/s");
if((portchange & USB_PORT_STAT_C_CONNECTION) ||
!(portstatus & USB_PORT_STAT_CONNECTION))
return -1;
/* if we have finished resetting, then break out of the loop */
if(!(portstatus & USB_PORT_STAT_RESET) &&
(portstatus & USB_PORT_STAT_ENABLE))
{
if(portstatus & USB_PORT_STAT_HIGH_SPEED)
{
USB_debug("Device is high speed!\n");
dev->speed = USB_SPEED_HIGH;
}
else if(portstatus & USB_PORT_STAT_LOW_SPEED)
{
USB_debug("Device is low speed!\n");
dev->speed = USB_SPEED_LOW;
}
else
{
USB_debug("Device is full speed!\n");
dev->speed = USB_SPEED_FULL;
}
dev->slow = (portstatus & USB_PORT_STAT_LOW_SPEED) ? 1 : 0;
return 0;
}
/* switch to the long delay after two short delay failures */
if(delay_time >= 2 * HUB_SHORT_RESET_TIME)
delay = HUB_LONG_RESET_TIME;
USB_info("port %d of hub %d not reset yet, waiting %dms\n", port + 1, hub->devnum, delay);
}
return -1;
}
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;
}
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;
unsigned short hubstatus, hubchange;
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.
*/
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++) {
struct usb_port_status portsts;
unsigned short portstatus, portchange;
ret = usb_get_port_status(dev, i + 1, &portsts);
if (ret < 0) {
err("get_port_status failed (err = %d)", ret);
continue;
}
portstatus = le16_to_cpu(portsts.wPortStatus);
portchange = le16_to_cpu(portsts.wPortChange);
if (portchange & USB_PORT_STAT_C_CONNECTION) {
dbg("port %d connection change", i + 1);
usb_hub_port_connect_change(dev, i, &portsts);
} 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(dev, i, &portsts);
}
}
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_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;
}
