b43: N-PHY: use cordic to generate samples

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/b43/phy_n.c b/drivers/net/wireless/b43/phy_n.c
index 061b01b..df4bf43 100644 (file)
--- a/drivers/net/wireless/b43/phy_n.c
+++ b/drivers/net/wireless/b43/phy_n.c
@@ -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 */