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authorRafał Miłecki <zajec5@gmail.com>2010-12-07 09:42:07 +0100
committerJohn W. Linville <linville@tuxdriver.com>2010-12-08 15:38:44 -0500
commit155180803c95c7b14b355f60431bef45116c151e (patch)
tree5b02de749bb879e1ad488c2c6fd53884044b72f8 /drivers/net/wireless
parent755fd183b89bc8a302669b6f35cd98faee473f7a (diff)
b43: flush PHY writes when needed
Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless')
-rw-r--r--drivers/net/wireless/b43/phy_common.c5
-rw-r--r--drivers/net/wireless/b43/phy_common.h6
2 files changed, 11 insertions, 0 deletions
diff --git a/drivers/net/wireless/b43/phy_common.c b/drivers/net/wireless/b43/phy_common.c
index fa7f83fc8db9..0a91fc3a2e03 100644
--- a/drivers/net/wireless/b43/phy_common.c
+++ b/drivers/net/wireless/b43/phy_common.c
@@ -231,6 +231,7 @@ void b43_radio_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set)
u16 b43_phy_read(struct b43_wldev *dev, u16 reg)
{
assert_mac_suspended(dev);
+ dev->phy.writes_counter = 0;
return dev->phy.ops->phy_read(dev, reg);
}
@@ -238,6 +239,10 @@ void b43_phy_write(struct b43_wldev *dev, u16 reg, u16 value)
{
assert_mac_suspended(dev);
dev->phy.ops->phy_write(dev, reg, value);
+ if (++dev->phy.writes_counter == B43_MAX_WRITES_IN_ROW) {
+ b43_read16(dev, B43_MMIO_PHY_VER);
+ dev->phy.writes_counter = 0;
+ }
}
void b43_phy_copy(struct b43_wldev *dev, u16 destreg, u16 srcreg)
diff --git a/drivers/net/wireless/b43/phy_common.h b/drivers/net/wireless/b43/phy_common.h
index 0e6194228845..2ed60e5484b6 100644
--- a/drivers/net/wireless/b43/phy_common.h
+++ b/drivers/net/wireless/b43/phy_common.h
@@ -39,6 +39,9 @@ struct b43_c32 { s32 i, q; };
#define B43_PHYVER_TYPE_SHIFT 8
#define B43_PHYVER_VERSION 0x00FF
+/* PHY writes need to be flushed if we reach limit */
+#define B43_MAX_WRITES_IN_ROW 24
+
/**
* enum b43_interference_mitigation - Interference Mitigation mode
*
@@ -232,6 +235,9 @@ struct b43_phy {
/* PHY revision number. */
u8 rev;
+ /* Count writes since last read */
+ u8 writes_counter;
+
/* Radio versioning */
u16 radio_manuf; /* Radio manufacturer */
u16 radio_ver; /* Radio version */