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. */ USB_HUB_PRINTF("enabling power on all ports\n"); for (i = 0; i < dev->maxchild; i++) { usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_POWER); USB_HUB_PRINTF("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) { USB_HUB_PRINTF("port %d: get_port_status failed\n", i + 1); continue; } /* * 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)) { USB_HUB_PRINTF("port %d: Port power change failed\n", i + 1); continue; } } 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 for power to become stable */ mdelay(max(pgood_delay, CONFIG_USB_HUB_MIN_POWER_ON_DELAY)); }
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; }
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; }
static void usb_hub_power_on(struct usb_hub_device *hub) { int i; struct usb_device *dev; unsigned pgood_delay = hub->desc.bPwrOn2PwrGood * 2; 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 at least 100 msec for power to become stable */ mdelay(max(pgood_delay, (unsigned)100)); }
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; 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); mdelay(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 = le16_to_cpu(portsts->wPortStatus); portchange = le16_to_cpu(portsts->wPortChange); USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus, portchange, portspeed(portstatus)); 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; mdelay(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; }
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; }
int hub_port_reset(struct usb_device *dev, int port, unsigned short *portstat) { int tries, status; unsigned delay = HUB_SHORT_RESET_TIME; int oldspeed = dev->speed; /* root hub ports have a slightly longer reset period * (from USB 2.0 spec, section 7.1.7.5) */ if (!dev->parent) { delay = HUB_ROOT_RESET_TIME; } /* Some low speed devices have problems with the quick delay, so */ /* be a bit pessimistic with those devices. RHbug #23670 */ if (oldspeed == USB_SPEED_LOW) delay = HUB_LONG_RESET_TIME; USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port); for (tries = 0; tries < MAX_TRIES; tries++) { status = usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET); if (status) USB_HUB_PRINTF("cannot reset port %d (err = %d)\n", port, status); else { status = hub_port_wait_reset(dev, port, delay, portstat); if (status && status != -ENOTCONN) USB_HUB_PRINTF("port_wait_reset: err = %d\n", status); } /* return on disconnect or reset */ switch (status) { case 0: /* TRSTRCY = 10 ms; plus some extra */ mdelay(10 + 40); /* FALL THROUGH */ case -1: case -ENOTCONN: /* we have finished trying to reset, so return */ usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET); return 0; } USB_HUB_PRINTF ( "port %d not enabled, trying reset again...\n", port); delay = HUB_LONG_RESET_TIME; } 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; } 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; struct usb_hub_status *hubsts; //unsigned char *buffer; //buffer = (unsigned char *)KSEG1ADDR(&buffer[2]); /* "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; length = min(descriptor->bLength, sizeof(struct usb_hub_descriptor)); if (usb_get_hub_descriptor(dev, buffer, length) < 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, 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; 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 DEBUG #if 0 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); /* * 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 = 0, portchange = 0; int ret; ulong start = get_timer(0); //struct usb_port_status *portsts; //portsts = (struct usb_port_status *)KSEG1ADDR(&portsts2[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); if ((portchange & USB_PORT_STAT_C_CONNECTION) == (portstatus & USB_PORT_STAT_CONNECTION)) { //printf(" @@ 33 !!\n"); break; } } while (get_timer(start) < CONFIG_SYS_HZ * 10); mdelay(50); if (ret < 0) continue; 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); /* * 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]))) { USB_HUB_PRINTF("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) { 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; }