Hello, While investigating ways to disable CCA on a AR5212, I observed what may be a couple typos in ath5k/reg.h (in the 2.6.35 kernel version at least):
#define AR5K_DIAG_SW_RX_CLEAR_HIGH 0x0010000 /* Force RX Clear high #define AR5K_DIAG_SW_IGNORE_CARR_SENSE 0x0020000 /* Ignore virtual carri #define AR5K_DIAG_SW_CHANEL_IDLE_HIGH 0x0040000 /* Force channel idle h #define AR5K_DIAG_SW_PHEAR_ME 0x0080000 /* ??? */ Is there a zero missing at the end? If not, then these seem to conflict with these other register bit definitions for the diag register: #define AR5K_DIAG_SW_DIS_SEQ_INC 0x00040000 /* Disable seqnum incre #define AR5K_DIAG_SW_FRAME_NV0_5210 0x00080000 #define AR5K_DIAG_SW_FRAME_NV0_5211 0x00020000 /* Accept frames of non It would appear either one or the other set of register definitions is incorrect, and my inclination is the ones containing only 7 hex digits would be more likely. That also appears to be a weird spelling of channel (_CHANEL_IDLE_HIGH). Interestingly, by adding the zero at the end so these match the values various researchers messing with CCA on Madwifi are using, I've observed that it doesn't appear to be possible to set the diag register to 0x00400000 to force channel idle high. Writing that value to the diag register, then reading the diag register comes back 0x00000000 and no effect on CCA behavior is observed. However, writing 0x00200000 to the diag register reads back as 0x00200000 (and does appear to affect CCA, although it also hoses the receiver's sensitivity for some reason), so my code for setting it appears correct. This either means the AR5212 chipset doesn't really have that bit in the diag register, or 0x00400000 isn't the correct value for AR5K_DIAG_SW_CHANEL_IDLE_HIGH either. If anyone has actually succeeded in setting the CHANEL_IDLE_HIGH bit in the diag register, where you using the 7 digit values above or the apparently correct 8 digit value with the missing 0 added at the end? And on which chipset? Cheers, -Ryan _______________________________________________ ath5k-devel mailing list ath5k-devel@lists.ath5k.org https://lists.ath5k.org/mailman/listinfo/ath5k-devel
