diff options
| author | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2008-06-12 09:47:15 +0800 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-06-14 12:18:09 -0400 |
| commit | 95483b69c8c0d49e43c97ecb5eb3cbec48a02d61 (patch) | |
| tree | 81261960fe03b9d6898a1690da103fcaf62d42e2 /drivers | |
| parent | 91dbc5bdbaccc3e89f757afb53c6956c40b80306 (diff) | |
| download | linux-95483b69c8c0d49e43c97ecb5eb3cbec48a02d61.tar.bz2 | |
iwlwifi: remove dead code iwl4965_calc_db_from_ratio
This patch removes iwl4965_calc_db_from_ratio which is dead code.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl4965-base.c | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c index 14d44321771f..8f1ab23e9d61 100644 --- a/drivers/net/wireless/iwlwifi/iwl4965-base.c +++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c @@ -1597,42 +1597,6 @@ void iwl_rx_handle(struct iwl_priv *priv) priv->rxq.read = i; iwl_rx_queue_restock(priv); } -/* Convert linear signal-to-noise ratio into dB */ -static u8 ratio2dB[100] = { -/* 0 1 2 3 4 5 6 7 8 9 */ - 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */ - 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */ - 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */ - 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */ - 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */ - 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */ - 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */ - 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */ - 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */ - 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */ -}; - -/* Calculates a relative dB value from a ratio of linear - * (i.e. not dB) signal levels. - * Conversion assumes that levels are voltages (20*log), not powers (10*log). */ -int iwl4965_calc_db_from_ratio(int sig_ratio) -{ - /* 1000:1 or higher just report as 60 dB */ - if (sig_ratio >= 1000) - return 60; - - /* 100:1 or higher, divide by 10 and use table, - * add 20 dB to make up for divide by 10 */ - if (sig_ratio >= 100) - return (20 + (int)ratio2dB[sig_ratio/10]); - - /* We shouldn't see this */ - if (sig_ratio < 1) - return 0; - - /* Use table for ratios 1:1 - 99:1 */ - return (int)ratio2dB[sig_ratio]; -} #define PERFECT_RSSI (-20) /* dBm */ #define WORST_RSSI (-95) /* dBm */ |