From: Jes Sorensen <Jes.Sorensen@xxxxxxxxxx>
Adjust AFE before enabling PLL on 8192eu, probably also needed for
8723bu.
Signed-off-by: Jes Sorensen <Jes.Sorensen@xxxxxxxxxx>
---
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c | 39 ++++++++++++++++++++++
.../net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h | 4 +++
2 files changed, 43 insertions(+)
diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
index 61c0ece..b8cd42e 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
@@ -7093,6 +7093,41 @@ static int rtl8192cu_power_on(struct rtl8xxxu_priv *priv)
#endif
+/*
+ * This is needed for 8723bu as well, presumable
+ */
+static void rtl8192e_crystal_afe_adjust(struct rtl8xxxu_priv *priv)
+{
+ u8 val8;
+ u32 val32;
+
+ /*
+ * 40Mhz crystal source, MAC 0x28[2]=0
+ */
+ val8 = rtl8xxxu_read8(priv, REG_AFE_PLL_CTRL);
+ val8 &= 0xfb;
+ rtl8xxxu_write8(priv, REG_AFE_PLL_CTRL, val8);
+
+ val32 = rtl8xxxu_read32(priv, REG_AFE_CTRL4);
+ val32 &= 0xfffffc7f;
+ rtl8xxxu_write32(priv, REG_AFE_CTRL4, val32);
+
+ /*
+ * 92e AFE parameter
+ * AFE PLL KVCO selection, MAC 0x28[6]=1
+ */
+ val8 = rtl8xxxu_read8(priv, REG_AFE_PLL_CTRL);
+ val8 &= 0xbf;
+ rtl8xxxu_write8(priv, REG_AFE_PLL_CTRL, val8);
+
+ /*
+ * AFE PLL KVCO selection, MAC 0x78[21]=0
+ */
+ val32 = rtl8xxxu_read32(priv, REG_AFE_CTRL4);
+ val32 &= 0xffdfffff;
+ rtl8xxxu_write32(priv, REG_AFE_CTRL4, val32);
+}
+
static int rtl8192eu_power_on(struct rtl8xxxu_priv *priv)
{
u16 val16;
@@ -7115,6 +7150,10 @@ static int rtl8192eu_power_on(struct rtl8xxxu_priv *priv)
rtl8xxxu_write8(priv, REG_LDO_SW_CTRL, 0x83);
}
+ /*
+ * Adjust AFE before enabling PLL
+ */
+ rtl8192e_crystal_afe_adjust(priv);
rtl8192e_disabled_to_emu(priv);
ret = rtl8192e_emu_to_active(priv);
diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h
index 2aa14b1..bb08a39 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h
@@ -109,6 +109,9 @@
#define AFE_XTAL_GATE_DIG BIT(17)
#define AFE_XTAL_BT_GATE BIT(20)
+/*
+ * 0x0028 is also known as REG_AFE_CTRL2 on 8723bu/8192eu
+ */
#define REG_AFE_PLL_CTRL 0x0028
#define AFE_PLL_ENABLE BIT(0)
#define AFE_PLL_320_ENABLE BIT(1)
@@ -192,6 +195,7 @@
control */
#define MULTI_GPS_FUNC_EN BIT(22) /* GPS function enable */
+#define REG_AFE_CTRL4 0x0078 /* 8192eu/8723bu */
#define REG_LDO_SW_CTRL 0x007c /* 8192eu */
#define REG_MCU_FW_DL 0x0080
--
2.5.5
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