-
-/****************************************************************************
- * HUB "Driver"
- * Probes device for being a hub and configurate it
- */
-
-#undef USB_HUB_DEBUG
-
-#ifdef USB_HUB_DEBUG
-#define USB_HUB_PRINTF(fmt,args...) printf (fmt ,##args)
-#else
-#define USB_HUB_PRINTF(fmt,args...)
-#endif
-
-
-static struct usb_hub_device hub_dev[USB_MAX_HUB];
-static int usb_hub_index;
-
-
-int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
-{
- return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
- USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
- USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
-}
-
-int usb_clear_hub_feature(struct usb_device *dev, int feature)
-{
- return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
- USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature, 0, NULL, 0, USB_CNTL_TIMEOUT);
-}
-
-int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
-{
- return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
- USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT);
-}
-
-int usb_set_port_feature(struct usb_device *dev, int port, int feature)
-{
- return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
- USB_REQ_SET_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT);
-}
-
-int usb_get_hub_status(struct usb_device *dev, void *data)
-{
- return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
- USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
- data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
-}
-
-int usb_get_port_status(struct usb_device *dev, int port, void *data)
-{
- return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
- USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
- data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
-}
-
-
-static void usb_hub_power_on(struct usb_hub_device *hub)
-{
- int i;
- struct usb_device *dev;
-
- dev=hub->pusb_dev;
- /* Enable power to the ports */
- USB_HUB_PRINTF("enabling power on all ports\n");
- for (i = 0; i < dev->maxchild; i++) {
- usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
- USB_HUB_PRINTF("port %d returns %lX\n",i+1,dev->status);
- wait_ms(hub->desc.bPwrOn2PwrGood * 2);
- }
-}
-
-void usb_hub_reset(void)
-{
- usb_hub_index=0;
-}
-
-struct usb_hub_device *usb_hub_allocate(void)
-{
- if(usb_hub_index<USB_MAX_HUB) {
- return &hub_dev[usb_hub_index++];
- }
- printf("ERROR: USB_MAX_HUB (%d) reached\n",USB_MAX_HUB);
- return NULL;
-}
-
-#define MAX_TRIES 5
-
-static int hub_port_reset(struct usb_device *dev, int port,
- unsigned short *portstat)
-{
- int tries;
- struct usb_port_status portsts;
- unsigned short portstatus, portchange;
-
-
- USB_HUB_PRINTF("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);
- wait_ms(200);
-
- if (usb_get_port_status(dev, port + 1, &portsts)<0) {
- USB_HUB_PRINTF("get_port_status failed status %lX\n",dev->status);
- return -1;
- }
- portstatus = swap_16(portsts.wPortStatus);
- portchange = swap_16(portsts.wPortChange);
- USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus ,portchange,
- portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? "Low Speed" : "High Speed");
- USB_HUB_PRINTF("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;
- }
-
- wait_ms(200);
- }
-
- if (tries==MAX_TRIES) {
- USB_HUB_PRINTF("Cannot enable port %i after %i retries, disabling port.\n", port+1, MAX_TRIES);
- USB_HUB_PRINTF("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;
-
-}
-
-
-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) {
- USB_HUB_PRINTF("get_port_status failed\n");
- return;
- }
-
- portstatus = swap_16(portsts.wPortStatus);
- portchange = swap_16(portsts.wPortChange);
- USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus, portchange,
- portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? "Low Speed" : "High Speed");
-
- /* 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;
- }
- wait_ms(200);
-
- /* Reset the port */
- if (hub_port_reset(dev, port, &portstatus) < 0) {
- printf("cannot reset port %i!?\n", port + 1);
- return;
- }
-
- wait_ms(200);
-
- /* Allocate a new device struct for it */
- usb=usb_alloc_new_device();
- usb->slow = (portstatus & USB_PORT_STAT_LOW_SPEED) ? 1 : 0;
-
- dev->children[port] = usb;
- usb->parent=dev;
- /* Run it through the hoops (find a driver, etc) */
- if (usb_new_device(usb)) {
- /* Woops, disable the port */
- USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
- usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
- }
-}
-
-
-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;
-
- /* "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=swap_16(descriptor->wHubCharacteristics);
- /* set the bitmap */
- bitmap=(unsigned char *)&hub->desc.DeviceRemovable[0];
- memset(bitmap,0xff,(USB_MAXCHILDREN+1+7)/8); /* devices not removable by default */
- 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.DeviceRemovable[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;
- }
- hubsts = (struct usb_hub_status *)buffer;
- USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
- swap_16(hubsts->wHubStatus),swap_16(hubsts->wHubChange));
- USB_HUB_PRINTF("local power source is %s\n",
- (swap_16(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? "lost (inactive)" : "good");
- USB_HUB_PRINTF("%sover-current condition exists\n",
- (swap_16(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? "" : "no ");
- usb_hub_power_on(hub);
- for (i = 0; i < dev->maxchild; i++) {
- struct usb_port_status portsts;
- unsigned short portstatus, portchange;
-
- if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
- USB_HUB_PRINTF("get_port_status failed\n");
- continue;
- }
- portstatus = swap_16(portsts.wPortStatus);
- portchange = swap_16(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;
-}
-
-int usb_hub_probe(struct usb_device *dev, int ifnum)
-{
- struct usb_interface_descriptor *iface;
- struct usb_endpoint_descriptor *ep;
- int ret;
-
- iface = &dev->config.if_desc[ifnum];
- /* Is it a hub? */
- if (iface->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->bInterfaceSubClass != 0) &&
- (iface->bInterfaceSubClass != 1))
- return 0;
- /* Multiple endpoints? What kind of mutant ninja-hub is this? */
- if (iface->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;
-}
-
-#endif
-