[PATCH 1/3] b43: add helper waiting for given value in radio reg

[Rafał Miłecki]

Signed-off-by: Rafał Miłecki <zaj...@gmail.com>
---
 drivers/net/wireless/b43/phy_common.c |   15 +++++++++++++++
 drivers/net/wireless/b43/phy_common.h |    6 ++++++
 drivers/net/wireless/b43/phy_n.c      |   12 +-----------
 3 files changed, 22 insertions(+), 11 deletions(-)

diff --git a/drivers/net/wireless/b43/phy_common.c 
b/drivers/net/wireless/b43/phy_common.c
index f627cef..f01676a 100644
--- a/drivers/net/wireless/b43/phy_common.c
+++ b/drivers/net/wireless/b43/phy_common.c
@@ -240,6 +240,21 @@ void b43_radio_maskset(struct b43_wldev *dev, u16 offset, 
u16 mask, u16 set)
                          (b43_radio_read16(dev, offset) & mask) | set);
 }
 
+bool b43_radio_wait_value(struct b43_wldev *dev, u16 offset, u16 mask,
+                         u16 value, int delay, int timeout)
+{
+       u16 val;
+       int i;
+
+       for (i = 0; i < timeout; i += delay) {
+               val = b43_radio_read(dev, offset);
+               if ((val & mask) == value)
+                       return true;
+               udelay(delay);
+       }
+       return false;
+}
+
 u16 b43_phy_read(struct b43_wldev *dev, u16 reg)
 {
        assert_mac_suspended(dev);
diff --git a/drivers/net/wireless/b43/phy_common.h 
b/drivers/net/wireless/b43/phy_common.h
index 9233b13..f1b9993 100644
--- a/drivers/net/wireless/b43/phy_common.h
+++ b/drivers/net/wireless/b43/phy_common.h
@@ -365,6 +365,12 @@ void b43_radio_set(struct b43_wldev *dev, u16 offset, u16 
set);
 void b43_radio_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set);
 
 /**
+ * b43_radio_wait_value - Waits for a given value in masked register read
+ */
+bool b43_radio_wait_value(struct b43_wldev *dev, u16 offset, u16 mask,
+                         u16 value, int delay, int timeout);
+
+/**
  * b43_radio_lock - Lock firmware radio register access
  */
 void b43_radio_lock(struct b43_wldev *dev);
diff --git a/drivers/net/wireless/b43/phy_n.c b/drivers/net/wireless/b43/phy_n.c
index e49d847..0963d59 100644
--- a/drivers/net/wireless/b43/phy_n.c
+++ b/drivers/net/wireless/b43/phy_n.c
@@ -753,8 +753,6 @@ static void b43_radio_init2055_post(struct b43_wldev *dev)
 {
        struct b43_phy_n *nphy = dev->phy.n;
        struct ssb_sprom *sprom = dev->dev->bus_sprom;
-       int i;
-       u16 val;
        bool workaround = false;
 
        if (sprom->revision < 4)
@@ -777,15 +775,7 @@ static void b43_radio_init2055_post(struct b43_wldev *dev)
        b43_radio_set(dev, B2055_CAL_MISC, 0x1);
        msleep(1);
        b43_radio_set(dev, B2055_CAL_MISC, 0x40);
-       for (i = 0; i < 200; i++) {
-               val = b43_radio_read(dev, B2055_CAL_COUT2);
-               if (val & 0x80) {
-                       i = 0;
-                       break;
-               }
-               udelay(10);
-       }
-       if (i)
+       if (!b43_radio_wait_value(dev, B2055_CAL_COUT2, 0x80, 0x80, 10, 2000))
                b43err(dev->wl, "radio post init timeout\n");
        b43_radio_mask(dev, B2055_CAL_LPOCTL, 0xFF7F);
        b43_switch_channel(dev, dev->phy.channel);
-- 
1.7.7


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