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b43: N-PHY: use cordic to generate samples

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Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rafał Miłecki 2010-01-25 19:00:01 +01:00 • committed by John W. Linville
parent 6f98e62a9f
commit f2982181e0
1 changed files with 12 additions and 9 deletions
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21
drivers/net/wireless/b43/phy_n.c
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@ -821,8 +821,9 @@ static u16 b43_nphy_gen_load_samples(struct b43_wldev *dev, u32 freq, u16 max,
bool test)
{
int i;
u16 bw, len, num, rot, angle;
/* TODO: *buffer; */
u16 bw, len, rot, angle;
b43_c32 *samples;
bw = (dev->phy.is_40mhz) ? 40 : 20;
len = bw << 3;
@ -839,18 +840,20 @@ static u16 b43_nphy_gen_load_samples(struct b43_wldev *dev, u32 freq, u16 max,
len = bw << 1;
}
/* TODO: buffer = kzalloc(len * sizeof(u32), GFP_KERNEL); */
num = len;
samples = kzalloc(len * sizeof(b43_c32), GFP_KERNEL);
rot = (((freq * 36) / bw) << 16) / 100;
angle = 0;
for (i = 0; i < num; i++) {
/* TODO */
for (i = 0; i < len; i++) {
samples[i] = b43_cordic(angle);
angle += rot;
samples[i].q = CORDIC_CONVERT(samples[i].q * max);
samples[i].i = CORDIC_CONVERT(samples[i].i * max);
}
/* TODO: Call N PHY Load Sample Table with buffer, num as arguments */
/* TODO: kfree(buffer); */
return num;
/* TODO: Call N PHY Load Sample Table with buffer, len as arguments */
kfree(samples);
return len;
}
/* http://bcm-v4.sipsolutions.net/802.11/PHY/N/RunSamples */