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[bwn] use the shared bwn_sqrt() routine.

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This commit is contained in:
Adrian Chadd 2016-05-14 23:13:44 +00:00
parent 2c0046434b
commit dc94ad18cd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=299775
1 changed files with 2 additions and 51 deletions
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53
sys/dev/bwn/if_bwn_phy_lp.c
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@ -77,6 +77,8 @@ __FBSDID("$FreeBSD$");
#include <dev/bwn/if_bwn_debug.h>
#include <dev/bwn/if_bwn_misc.h>
#include <dev/bwn/if_bwn_util.h>
#include <dev/bwn/if_bwn_phy_common.h>
#include <dev/bwn/if_bwn_phy_lp.h>
static void bwn_phy_lp_readsprom(struct bwn_mac *);
@ -2271,57 +2273,6 @@ bwn_phy_lp_clear_deaf(struct bwn_mac *mac, uint8_t user)
BWN_PHY_SETMASK(mac, BWN_PHY_CRSGAIN_CTL, 0xff1f, 0x20);
}
static unsigned int
bwn_sqrt(struct bwn_mac *mac, unsigned int x)
{
/* Table holding (10 * sqrt(x)) for x between 1 and 256. */
static uint8_t sqrt_table[256] = {
10, 14, 17, 20, 22, 24, 26, 28,
30, 31, 33, 34, 36, 37, 38, 40,
41, 42, 43, 44, 45, 46, 47, 48,
50, 50, 51, 52, 53, 54, 55, 56,
57, 58, 59, 60, 60, 61, 62, 63,
64, 64, 65, 66, 67, 67, 68, 69,
70, 70, 71, 72, 72, 73, 74, 74,
75, 76, 76, 77, 78, 78, 79, 80,
80, 81, 81, 82, 83, 83, 84, 84,
85, 86, 86, 87, 87, 88, 88, 89,
90, 90, 91, 91, 92, 92, 93, 93,
94, 94, 95, 95, 96, 96, 97, 97,
98, 98, 99, 100, 100, 100, 101, 101,
102, 102, 103, 103, 104, 104, 105, 105,
106, 106, 107, 107, 108, 108, 109, 109,
110, 110, 110, 111, 111, 112, 112, 113,
113, 114, 114, 114, 115, 115, 116, 116,
117, 117, 117, 118, 118, 119, 119, 120,
120, 120, 121, 121, 122, 122, 122, 123,
123, 124, 124, 124, 125, 125, 126, 126,
126, 127, 127, 128, 128, 128, 129, 129,
130, 130, 130, 131, 131, 131, 132, 132,
133, 133, 133, 134, 134, 134, 135, 135,
136, 136, 136, 137, 137, 137, 138, 138,
138, 139, 139, 140, 140, 140, 141, 141,
141, 142, 142, 142, 143, 143, 143, 144,
144, 144, 145, 145, 145, 146, 146, 146,
147, 147, 147, 148, 148, 148, 149, 149,
150, 150, 150, 150, 151, 151, 151, 152,
152, 152, 153, 153, 153, 154, 154, 154,
155, 155, 155, 156, 156, 156, 157, 157,
157, 158, 158, 158, 159, 159, 159, 160
};
if (x == 0)
return (0);
if (x >= 256) {
unsigned int tmp;
for (tmp = 0; x >= (2 * tmp) + 1; x -= (2 * tmp++) + 1)
/* do nothing */ ;
return (tmp);
}
return (sqrt_table[x - 1] / 10);
}
static int
bwn_phy_lp_calc_rx_iq_comp(struct bwn_mac *mac, uint16_t sample)
{