From: Jes Sorensen <Jes.Sorensen@xxxxxxxxxx>
This should help when reloading the driver for 8723bu devices
Signed-off-by: Jes Sorensen <Jes.Sorensen@xxxxxxxxxx>
---
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c | 34 ++++++++++++++++++++++
.../net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h | 2 ++
2 files changed, 36 insertions(+)
diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
index 7f68b61..c594afa 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
@@ -5687,6 +5687,36 @@ static int rtl8xxxu_emu_to_disabled(struct rtl8xxxu_priv *priv)
return 0;
}
+static int rtl8xxxu_flush_fifo(struct rtl8xxxu_priv *priv)
+{
+ u32 val32;
+ int retry, retval;
+
+ rtl8xxxu_write8(priv, REG_TXPAUSE, 0xff);
+
+ val32 = rtl8xxxu_read32(priv, REG_RXPKT_NUM);
+ val32 |= RXPKT_NUM_RW_RELEASE_EN;
+ rtl8xxxu_write32(priv, REG_RXPKT_NUM, val32);
+
+ retry = 100;
+ retval = -EBUSY;
+
+ do {
+ val32 = rtl8xxxu_read32(priv, REG_RXPKT_NUM);
+ if (val32 & RXPKT_NUM_RXDMA_IDLE) {
+ retval = 0;
+ break;
+ }
+ } while (retry--);
+
+ rtl8xxxu_write16(priv, REG_RQPN_NPQ, 0);
+ rtl8xxxu_write32(priv, REG_RQPN, 0x80000000);
+ mdelay(2);
+ pr_info("%s: retry %i\n", __func__, retry);
+
+ return retval;
+}
+
static int rtl8723au_power_on(struct rtl8xxxu_priv *priv)
{
u8 val8;
@@ -5957,6 +5987,8 @@ static void rtl8xxxu_power_off(struct rtl8xxxu_priv *priv)
rtl8xxxu_write32(priv, REG_FPGA0_XCD_RF_PARM, val32);
}
+ rtl8xxxu_flush_fifo(priv);
+
rtl8xxxu_active_to_lps(priv);
/* Turn off RF */
@@ -5995,6 +6027,8 @@ static void rtl8723bu_power_off(struct rtl8xxxu_priv *priv)
u8 val8;
u16 val16;
+ rtl8xxxu_flush_fifo(priv);
+
/*
* Disable TX report timer
*/
diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h
index a8d5c9f..e545e84 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h
@@ -404,6 +404,8 @@
#define REG_RXDMA_AGG_PG_TH 0x0280
#define RXDMA_USB_AGG_ENABLE BIT(31)
#define REG_RXPKT_NUM 0x0284
+#define RXPKT_NUM_RXDMA_IDLE BIT(17)
+#define RXPKT_NUM_RW_RELEASE_EN BIT(18)
#define REG_RXDMA_STATUS 0x0288
/* Presumably only found on newer chips such as 8723bu */
--
2.5.0
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
