From: Madhan Mohan R <[email protected]>

Along with F2 watermark (existing) configuration, F1 MesBusyCtrl
should be enabled & sdio device RX FIFO watermark should be
configured to avoid overflow errors.

Reviewed-by: Arend van Spriel <[email protected]>
Signed-off-by: Madhan Mohan R <[email protected]>
Signed-off-by: Chi-Hsien Lin <[email protected]>
---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 3 +++
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h | 9 ++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c 
b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
index c833e24c751c..7a0601543dff 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
@@ -4119,6 +4119,9 @@ static void brcmf_sdio_firmware_callback(struct device 
*dev, int err,
                        devctl |= SBSDIO_DEVCTL_F2WM_ENAB;
                        brcmf_sdiod_writeb(sdiod, SBSDIO_DEVICE_CTL, devctl,
                                           &err);
+                       brcmf_sdiod_writeb(sdiod, SBSDIO_FUNC1_MESBUSYCTRL,
+                                          CY_4373_F2_WATERMARK |
+                                          SBSDIO_MESBUSYCTRL_ENAB, &err);
                        break;
                default:
                        brcmf_sdiod_writeb(sdiod, SBSDIO_WATERMARK,
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h 
b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h
index 7faed831f07d..34b031154da9 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h
@@ -77,7 +77,7 @@
 #define SBSDIO_GPIO_OUT                        0x10006
 /* gpio enable */
 #define SBSDIO_GPIO_EN                 0x10007
-/* rev < 7, watermark for sdio device */
+/* rev < 7, watermark for sdio device TX path */
 #define SBSDIO_WATERMARK               0x10008
 /* control busy signal generation */
 #define SBSDIO_DEVICE_CTL              0x10009
@@ -104,6 +104,13 @@
 #define SBSDIO_FUNC1_RFRAMEBCHI                0x1001C
 /* MesBusyCtl (rev 11) */
 #define SBSDIO_FUNC1_MESBUSYCTRL       0x1001D
+/* Watermark for sdio device RX path */
+#define SBSDIO_MESBUSY_RXFIFO_WM_MASK  0x7F
+#define SBSDIO_MESBUSY_RXFIFO_WM_SHIFT 0
+/* Enable busy capability for MES access */
+#define SBSDIO_MESBUSYCTRL_ENAB                0x80
+#define SBSDIO_MESBUSYCTRL_ENAB_SHIFT  7
+
 /* Sdio Core Rev 12 */
 #define SBSDIO_FUNC1_WAKEUPCTRL                0x1001E
 #define SBSDIO_FUNC1_WCTRL_ALPWAIT_MASK                0x1
-- 
2.1.0

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