diff options
Diffstat (limited to 'drivers/usb/core/otg_whitelist.h')
| -rw-r--r-- | drivers/usb/core/otg_whitelist.h | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/drivers/usb/core/otg_whitelist.h b/drivers/usb/core/otg_whitelist.h index e8cdce571bb..c99ad782742 100644 --- a/drivers/usb/core/otg_whitelist.h +++ b/drivers/usb/core/otg_whitelist.h @@ -16,6 +16,11 @@ * YOU _SHOULD_ CHANGE THIS LIST TO MATCH YOUR PRODUCT AND ITS TESTING! */ +//ST-Ericsson begin +#define CONFIG_USB_OTG_WHITELIST +//ST-Ericsson end + + static struct usb_device_id whitelist_table [] = { /* hubs are optional in OTG, but very handy ... */ @@ -49,6 +54,8 @@ static struct usb_device_id whitelist_table [] = { static int is_targeted(struct usb_device *dev) { struct usb_device_id *id = whitelist_table; + unsigned char tier=0; + struct usb_device *root_hub; /* possible in developer configs only! */ if (!dev->bus->otg_port) @@ -92,7 +99,25 @@ static int is_targeted(struct usb_device *dev) if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_PROTOCOL) && (id->bDeviceProtocol != dev->descriptor.bDeviceProtocol)) continue; - + /*Hub is targeted device,so code execution should reach here */ + if (USB_CLASS_HUB == dev->descriptor.bDeviceClass) { + /* count the tiers and if it is more than 6, return 0 */ + tier = 0; + + root_hub = dev->bus->root_hub; + while((dev->parent != NULL) && /* root hub not count */ + (dev->parent != root_hub) && + (tier != 6)) {/* interal hub not count */ + tier++; + dev = dev->parent; + } + + if (tier == 6) { + printk("5 tier of hubs reached, newly added hub will not be supported!\n"); + hub_tier=1; + return 0; + } + } return 1; } |