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rtl8xxxu: Flush FIFO before powering down devices 

This should help when reloading the driver for 8723bu devices

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Jes Sorensen 2016-02-29 17:05:48 -05:00 committed by Kalle Valo
parent fe37d5f644
commit 430b454c5a
2 changed files with 36 additions and 0 deletions
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34
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
View File

@ -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
*/

2
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h
View File

@ -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 */