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[04/13] b43: HT-PHY: implement spurious tone avoidance

Message ID 1362671247-10766-5-git-send-email-zajec5@gmail.com (mailing list archive)
State Not Applicable, archived
Headers show

Commit Message

Rafał Miłecki March 7, 2013, 3:47 p.m. UTC 
On N-PHY it's also done after TX power fix, so it was easy to spot.
Unfortunately the MMIO logs I have from ndsiwrapper include channels
1-12 only, so enabling code for 13 and 14 is just a N-PHY-based guess.

Signed-off-by: Rafa? Mi?ecki <zajec5@gmail.com>
---
 drivers/net/wireless/b43/phy_ht.c |   20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
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Patch

diff --git a/drivers/net/wireless/b43/phy_ht.c b/drivers/net/wireless/b43/phy_ht.c
index f7463aa..4ccd371 100644
--- a/drivers/net/wireless/b43/phy_ht.c
+++ b/drivers/net/wireless/b43/phy_ht.c
@@ -285,6 +285,24 @@  static void b43_phy_ht_tx_power_fix(struct b43_wldev *dev)
  * Channel switching ops.
  **************************************************/
 
+static void b43_phy_ht_spur_avoid(struct b43_wldev *dev,
+				  struct ieee80211_channel *new_channel)
+{
+	struct bcma_device *core = dev->dev->bdev;
+	int spuravoid = 0;
+
+	/* Check for 13 and 14 is just a guess, we don't have enough logs. */
+	if (new_channel->hw_value == 13 || new_channel->hw_value == 14)
+		spuravoid = 1;
+	bcma_core_pll_ctl(core, B43_BCMA_CLKCTLST_PHY_PLL_REQ, 0, false);
+	bcma_pmu_spuravoid_pllupdate(&core->bus->drv_cc, spuravoid);
+	bcma_core_pll_ctl(core,
+			  B43_BCMA_CLKCTLST_80211_PLL_REQ |
+			  B43_BCMA_CLKCTLST_PHY_PLL_REQ,
+			  B43_BCMA_CLKCTLST_80211_PLL_ST |
+			  B43_BCMA_CLKCTLST_PHY_PLL_ST, false);
+}
+
 static void b43_phy_ht_channel_setup(struct b43_wldev *dev,
 				const struct b43_phy_ht_channeltab_e_phy *e,
 				struct ieee80211_channel *new_channel)
@@ -318,6 +336,8 @@  static void b43_phy_ht_channel_setup(struct b43_wldev *dev,
 	if (1) /* TODO: On N it's for early devices only, what about HT? */
 		b43_phy_ht_tx_power_fix(dev);
 
+	b43_phy_ht_spur_avoid(dev, new_channel);
+
 	b43_phy_write(dev, 0x017e, 0x3830);
 }