b43: make cordic common (LP-PHY and N-PHY need it)

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_common.c b/drivers/net/wireless/b43/phy_common.c
index 75b26e175e8fc9028da8084fac5eebb9bca3f92b..446c41bb1e9f297aa06656cdb3255edef981abaa 100644 (file)
--- a/drivers/net/wireless/b43/phy_common.c
+++ b/drivers/net/wireless/b43/phy_common.c
@@ -421,3 +421,41 @@ void b43_phyop_switch_analog_generic(struct b43_wldev *dev, bool on)
 {
        b43_write16(dev, B43_MMIO_PHY0, on ? 0 : 0xF4);
 }
+
+struct b43_c32 b43_cordic(int theta)
+{
+       u32 arctg[] = { 2949120, 1740967, 919879, 466945, 234379, 117304,
+                     58666, 29335, 14668, 7334, 3667, 1833, 917, 458,
+                     229, 115, 57, 29, };
+       int i, tmp, signx = 1, angle = 0;
+       struct b43_c32 ret = { .i = 39797, .q = 0, };
+
+       theta = clamp_t(int, theta, -180, 180);
+
+       if (theta > 90) {
+               theta -= 180;
+               signx = -1;
+       } else if (theta < -90) {
+               theta += 180;
+               signx = -1;
+       }
+
+       for (i = 0; i <= 17; i++) {
+               if (theta > angle) {
+                       tmp = ret.i - (ret.q >> i);
+                       ret.q += ret.i >> i;
+                       ret.i = tmp;
+                       angle += arctg[i];
+               } else {
+                       tmp = ret.i + (ret.q >> i);
+                       ret.q -= ret.i >> i;
+                       ret.i = tmp;
+                       angle -= arctg[i];
+               }
+       }
+
+       ret.i *= signx;
+       ret.q *= signx;
+
+       return ret;
+}

diff --git a/drivers/net/wireless/b43/phy_common.h b/drivers/net/wireless/b43/phy_common.h
index f635f9e4f83d60d950a2eceacb1cb3bc0c81a1b3..9e4de47d0608a4c500ae3d0e9992783b2f690c08 100644 (file)
--- a/drivers/net/wireless/b43/phy_common.h
+++ b/drivers/net/wireless/b43/phy_common.h
@@ -5,6 +5,8 @@
 
 struct b43_wldev;
 
+/* Complex number using 2 32-bit signed integers */
+struct b43_c32 { s32 i, q; };
 
 /* PHY register routing bits */
 #define B43_PHYROUTE                   0x0C00 /* PHY register routing bits mask */
@@ -421,5 +423,6 @@ int b43_phy_shm_tssi_read(struct b43_wldev *dev, u16 shm_offset);
  */
 void b43_phyop_switch_analog_generic(struct b43_wldev *dev, bool on);
 
+struct b43_c32 b43_cordic(int theta);
 
 #endif /* LINUX_B43_PHY_COMMON_H_ */

diff --git a/drivers/net/wireless/b43/phy_lp.c b/drivers/net/wireless/b43/phy_lp.c
index b58d6cf26580a90c79d0b84c11b9148192d241be..453585073437811446265950a770976a0eb0afe7 100644 (file)
--- a/drivers/net/wireless/b43/phy_lp.c
+++ b/drivers/net/wireless/b43/phy_lp.c
@@ -1767,47 +1767,6 @@ out:
        return ret;
 }
 
-/* Complex number using 2 32-bit signed integers */
-typedef struct {s32 i, q;} lpphy_c32;
-
-static lpphy_c32 lpphy_cordic(int theta)
-{
-       u32 arctg[] = { 2949120, 1740967, 919879, 466945, 234379, 117304,
-                     58666, 29335, 14668, 7334, 3667, 1833, 917, 458,
-                     229, 115, 57, 29, };
-       int i, tmp, signx = 1, angle = 0;
-       lpphy_c32 ret = { .i = 39797, .q = 0, };
-
-       theta = clamp_t(int, theta, -180, 180);
-
-       if (theta > 90) {
-               theta -= 180;
-               signx = -1;
-       } else if (theta < -90) {
-               theta += 180;
-               signx = -1;
-       }
-
-       for (i = 0; i <= 17; i++) {
-               if (theta > angle) {
-                       tmp = ret.i - (ret.q >> i);
-                       ret.q += ret.i >> i;
-                       ret.i = tmp;
-                       angle += arctg[i];
-               } else {
-                       tmp = ret.i + (ret.q >> i);
-                       ret.q -= ret.i >> i;
-                       ret.i = tmp;
-                       angle -= arctg[i];
-               }
-       }
-
-       ret.i *= signx;
-       ret.q *= signx;
-
-       return ret;
-}
-
 static void lpphy_run_samples(struct b43_wldev *dev, u16 samples, u16 loops,
                              u16 wait)
 {
@@ -1826,7 +1785,7 @@ static void lpphy_start_tx_tone(struct b43_wldev *dev, s32 freq, u16 max)
        struct b43_phy_lp *lpphy = dev->phy.lp;
        u16 buf[64];
        int i, samples = 0, angle = 0, rotation = (9 * freq) / 500;
-       lpphy_c32 sample;
+       struct b43_c32 sample;
 
        lpphy->tx_tone_freq = freq;
 
@@ -1842,7 +1801,7 @@ static void lpphy_start_tx_tone(struct b43_wldev *dev, s32 freq, u16 max)
        }
 
        for (i = 0; i < samples; i++) {
-               sample = lpphy_cordic(angle);
+               sample = b43_cordic(angle);
                angle += rotation;
                buf[i] = ((sample.i * max) & 0xFF) << 8;
                buf[i] |= (sample.q * max) & 0xFF;