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Staging: wlags49_h2: fix up signal levels 

Adjusts the signal levels reported by the wlags49_h2 and wlags49_h25 staging
drivers. With the constants supplied by Agere the signal levels are always
poor, even in close proximity to the AP. The signals are now measured with
a real device. 100% for close proximity to the AP, 0% for the noice floor.
Now the levels shown by the NetworkManager gauge make sense.

Some magic numbers in the related code are replaced by the correct constants
from the wireless extension interface (wireless.h). Also the flag IW_QUAL_DBM
is now set, as specified in the wireless.h header file.

Signed-off-by: Henk de Groot <pe1dnn@amsat.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Henk de Groot 2009-12-06 21:29:31 +01:00 committed by Greg Kroah-Hartman
parent d0f2cc5aea
commit e81589a70c
2 changed files with 39 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/staging/wlags49_h2/wl_if.h
View File

@ -80,13 +80,32 @@
#define TX_TIMEOUT ((800 * HZ) / 1000)
//#define HCF_MIN_COMM_QUALITY 0
//#define HCF_MAX_COMM_QUALITY 92
//#define HCF_MIN_SIGNAL_LEVEL 47
//#define HCF_MAX_SIGNAL_LEVEL 138
//#define HCF_MIN_NOISE_LEVEL 47
//#define HCF_MAX_NOISE_LEVEL 138
//#define HCF_0DBM_OFFSET 149
// PE1DNN
// Better data from the real world. Not scientific but empirical data gathered
// from a Thomson Speedtouch 110 which is identified as:
// PCMCIA Info: "Agere Systems" "Wireless PC Card Model 0110"
// Manufacture ID: 0156,0003
// Lowest measurment for noise floor seen is value 54
// Highest signal strength in close proximity to the AP seen is value 118
// Very good must be arround 100 (otherwise its never "full scale"
// All other constants are derrived from these. This makes the signal gauge
// work for me...
#define HCF_MIN_SIGNAL_LEVEL 54
#define HCF_MAX_SIGNAL_LEVEL 100
#define HCF_MIN_NOISE_LEVEL HCF_MIN_SIGNAL_LEVEL
#define HCF_MAX_NOISE_LEVEL HCF_MAX_SIGNAL_LEVEL
#define HCF_0DBM_OFFSET (HCF_MAX_SIGNAL_LEVEL + 1)
#define HCF_MIN_COMM_QUALITY 0
#define HCF_MAX_COMM_QUALITY 92
#define HCF_MIN_SIGNAL_LEVEL 47
#define HCF_MAX_SIGNAL_LEVEL 138
#define HCF_MIN_NOISE_LEVEL 47
#define HCF_MAX_NOISE_LEVEL 138
#define HCF_0DBM_OFFSET 149
#define HCF_MAX_COMM_QUALITY (HCF_MAX_SIGNAL_LEVEL - HCF_MIN_NOISE_LEVEL + 1)
/* For encryption (WEP) */
#define MIN_KEY_SIZE 5 // 40 bits RC4 - WEP

19
drivers/staging/wlags49_h2/wl_wext.c
View File

@ -2770,7 +2770,7 @@ static int wireless_get_scan(struct net_device *dev, struct iw_request_info *inf
iwe.u.qual.level = dbm(probe_resp->signal);
iwe.u.qual.noise = dbm(probe_resp->silence);
iwe.u.qual.qual = iwe.u.qual.level - iwe.u.qual.noise;
iwe.u.qual.updated = lp->probe_results.scan_complete;
iwe.u.qual.updated = lp->probe_results.scan_complete | IW_QUAL_DBM;
iwe.len = IW_EV_QUAL_LEN;
buf = IWE_STREAM_ADD_EVENT(info, buf, buf_end, &iwe, IW_EV_QUAL_LEN);
@ -3317,7 +3317,6 @@ struct iw_statistics * wl_wireless_stats( struct net_device *dev )
/* Get the current link quality information */
lp->ltvRecord.len = 1 + ( sizeof( *pQual ) / sizeof( hcf_16 ));
lp->ltvRecord.typ = CFG_COMMS_QUALITY;
status = hcf_get_info( &( lp->hcfCtx ), (LTVP)&( lp->ltvRecord ));
if( status == HCF_SUCCESS ) {
@ -3327,6 +3326,11 @@ struct iw_statistics * wl_wireless_stats( struct net_device *dev )
pStats->qual.qual = (u_char) CNV_LITTLE_TO_INT( pQual->coms_qual );
pStats->qual.level = (u_char) dbm( CNV_LITTLE_TO_INT( pQual->signal_lvl ));
pStats->qual.noise = (u_char) dbm( CNV_LITTLE_TO_INT( pQual->noise_lvl ));
pStats->qual.updated |= (IW_QUAL_QUAL_UPDATED |
IW_QUAL_LEVEL_UPDATED |
IW_QUAL_NOISE_UPDATED |
IW_QUAL_DBM);
#else
pStats->qual.qual = percent( CNV_LITTLE_TO_INT( pQual->coms_qual ),
HCF_MIN_COMM_QUALITY,
@ -3339,9 +3343,11 @@ struct iw_statistics * wl_wireless_stats( struct net_device *dev )
pStats->qual.noise = percent( CNV_LITTLE_TO_INT( pQual->noise_lvl ),
HCF_MIN_NOISE_LEVEL,
HCF_MAX_NOISE_LEVEL );
#endif /* USE_DBM */
pStats->qual.updated |= 0x07;
pStats->qual.updated |= (IW_QUAL_QUAL_UPDATED |
IW_QUAL_LEVEL_UPDATED |
IW_QUAL_NOISE_UPDATED);
#endif /* USE_DBM */
} else {
memset( &( pStats->qual ), 0, sizeof( pStats->qual ));
}
@ -3478,7 +3484,10 @@ inline void wl_spy_gather( struct net_device *dev, u_char *mac )
wstats.noise = (u_char) dbm(stats[0]);
wstats.qual = wstats.level > wstats.noise ? wstats.level - wstats.noise : 0;
wstats.updated = 7;
wstats.updated = (IW_QUAL_QUAL_UPDATED |
IW_QUAL_LEVEL_UPDATED |
IW_QUAL_NOISE_UPDATED |
IW_QUAL_DBM);
wireless_spy_update( dev, mac, &wstats );
}