b43: Implement PHY PLL reset

We should reset PLL after changing MAC frequency.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43/main.c

@@ -1204,6 +1204,36 @@ void b43_power_saving_ctl_bits(struct b43_wldev *dev, unsigned int ps_flags)
 	}
 }
 
+/* http://bcm-v4.sipsolutions.net/802.11/PHY/BmacCorePllReset */
+void b43_wireless_core_phy_pll_reset(struct b43_wldev *dev)
+{
+	struct bcma_drv_cc *bcma_cc __maybe_unused;
+	struct ssb_chipcommon *ssb_cc __maybe_unused;
+
+	switch (dev->dev->bus_type) {
+#ifdef CONFIG_B43_BCMA
+	case B43_BUS_BCMA:
+		bcma_cc = &dev->dev->bdev->bus->drv_cc;
+
+		bcma_cc_write32(bcma_cc, BCMA_CC_CHIPCTL_ADDR, 0);
+		bcma_cc_mask32(bcma_cc, BCMA_CC_CHIPCTL_DATA, ~0x4);
+		bcma_cc_set32(bcma_cc, BCMA_CC_CHIPCTL_DATA, 0x4);
+		bcma_cc_mask32(bcma_cc, BCMA_CC_CHIPCTL_DATA, ~0x4);
+		break;
+#endif
+#ifdef CONFIG_B43_SSB
+	case B43_BUS_SSB:
+		ssb_cc = &dev->dev->sdev->bus->chipco;
+
+		chipco_write32(ssb_cc, SSB_CHIPCO_CHIPCTL_ADDR, 0);
+		chipco_mask32(ssb_cc, SSB_CHIPCO_CHIPCTL_DATA, ~0x4);
+		chipco_set32(ssb_cc, SSB_CHIPCO_CHIPCTL_DATA, 0x4);
+		chipco_mask32(ssb_cc, SSB_CHIPCO_CHIPCTL_DATA, ~0x4);
+		break;
+#endif
+	}
+}
+
 #ifdef CONFIG_B43_BCMA
 static void b43_bcma_phy_reset(struct b43_wldev *dev)
 {

drivers/net/wireless/b43/main.h

@@ -96,6 +96,8 @@ void b43_controller_restart(struct b43_wldev *dev, const char *reason);
 #define B43_PS_ASLEEP	(1 << 3)	/* Force device asleep */
 void b43_power_saving_ctl_bits(struct b43_wldev *dev, unsigned int ps_flags);
 
+void b43_wireless_core_phy_pll_reset(struct b43_wldev *dev);
+
 void b43_mac_suspend(struct b43_wldev *dev);
 void b43_mac_enable(struct b43_wldev *dev);
 void b43_mac_phy_clock_set(struct b43_wldev *dev, bool on);

drivers/net/wireless/b43/phy_ht.c

@@ -762,7 +762,7 @@ static void b43_phy_ht_spur_avoid(struct b43_wldev *dev,
 
 	b43_mac_switch_freq(dev, spuravoid);
 
-	/* TODO: reset PLL */
+	b43_wireless_core_phy_pll_reset(dev);
 
 	if (spuravoid)
 		b43_phy_set(dev, B43_PHY_HT_BBCFG, B43_PHY_HT_BBCFG_RSTRX);

drivers/net/wireless/b43/phy_n.c

@@ -6369,7 +6369,7 @@ static void b43_nphy_channel_setup(struct b43_wldev *dev,
 		b43_mac_switch_freq(dev, spuravoid);
 
 		if (dev->phy.rev == 3 || dev->phy.rev == 4)
-			; /* TODO: reset PLL */
+			b43_wireless_core_phy_pll_reset(dev);
 
 		if (spuravoid)
 			b43_phy_set(dev, B43_NPHY_BBCFG, B43_NPHY_BBCFG_RSTRX);