1. HOST_WAKE irq trigger polarity, HIGH-LEVEL(default) or LOW-LEVEL
2. Reasons for "enable f2 failed"
why does the error "enable F2 failed" , the reason is either your bcmdhd.cal or the fw_*.bin is not correct, not matching the bcm4330 chip.
[wifi-bcm4330] miscellaneous things on bcm4330 wifi
原文：http://www.cnblogs.com/lake-of-embedded-system/p/4049739.html