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From:   Chi-Hsien Lin <chi-hsien.lin@cypress.com>
To:     linux-wireless@vger.kernel.org
Cc:     brcm80211-dev-list@broadcom.com, brcm80211-dev-list@cypress.com,
        Arend van Spriel <arend.vanspriel@broadcom.com>,
        Franky Lin <franky.lin@broadcom.com>,
        Hante Meuleman <hante.meuleman@broadcom.com>,
        Wright Feng <wright.feng@cypress.com>,
        Kalle Valo <kvalo@codeaurora.org>,
        Chi-hsien Lin <chi-hsien.lin@cypress.com>
Subject: [PATCH 4/5] brcmfmac: fix 43455 CRC error under SDIO 3.0 SDR104 mode
Date:   Wed, 20 May 2020 22:48:37 -0500
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From: Wright Feng <wright.feng@cypress.com>

This patch fixes 43455 CRC error while running throughput test with
suspend/resume stress test.

The continuous failure messages before system crash:
brcmfmac: brcmf_sdiod_sglist_rw: CMD53 sg block read failed -84
brcmfmac: brcmf_sdio_rxglom: glom read of 25600 bytes failed: -5
brcmfmac: brcmf_sdio_rxfail: abort command, terminate frame
brcmfmac: brcmf_sdiod_sglist_rw: CMD53 sg block read failed -84
brcmfmac: brcmf_sdio_rxglom: glom read of 24576 bytes failed: -5
brcmfmac: brcmf_sdio_rxfail: abort command, terminate frame

Signed-off-by: Wright Feng <wright.feng@cypress.com>
Signed-off-by: Chi-hsien Lin <chi-hsien.lin@cypress.com>
---
 .../broadcom/brcm80211/brcmfmac/sdio.c         | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/driv=
ers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
index 037a4efef924..58d9f0b90ad3 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
@@ -47,9 +47,14 @@
 #define CY_4339_MES_WATERMARK  80
 #define CY_4339_MESBUSYCTRL    (CY_4339_MES_WATERMARK | \
                                 SBSDIO_MESBUSYCTRL_ENAB)
+#define CY_43455_F2_WATERMARK  0x60
+#define CY_43455_MES_WATERMARK 0x50
+#define CY_43455_MESBUSYCTRL   (CY_43455_MES_WATERMARK | \
+                                SBSDIO_MESBUSYCTRL_ENAB)
 #define CY_435X_F2_WATERMARK   0x40
 #define CY_435X_F1_MESBUSYCTRL (CY_435X_F2_WATERMARK | \
                                 SBSDIO_MESBUSYCTRL_ENAB)
+
 #ifdef DEBUG

 #define BRCMF_TRAP_INFO_SIZE   80
@@ -4226,6 +4231,19 @@ static void brcmf_sdio_firmware_callback(struct devi=
ce *dev, int err,
                        brcmf_sdiod_writeb(sdiod, SBSDIO_FUNC1_MESBUSYCTRL,
                                           CY_4339_MESBUSYCTRL, &err);
                        break;
+               case SDIO_DEVICE_ID_BROADCOM_43455:
+                       brcmf_dbg(INFO, "set F2 watermark to 0x%x*4 bytes f=
or 43455\n",
+                                 CY_43455_F2_WATERMARK);
+                       brcmf_sdiod_writeb(sdiod, SBSDIO_WATERMARK,
+                                          CY_43455_F2_WATERMARK, &err);
+                       devctl =3D brcmf_sdiod_readb(sdiod, SBSDIO_DEVICE_C=
TL,
+                                                  &err);
+                       devctl |=3D SBSDIO_DEVCTL_F2WM_ENAB;
+                       brcmf_sdiod_writeb(sdiod, SBSDIO_DEVICE_CTL, devctl=
,
+                                          &err);
+                       brcmf_sdiod_writeb(sdiod, SBSDIO_FUNC1_MESBUSYCTRL,
+                                          CY_43455_MESBUSYCTRL, &err);
+                       break;
                case SDIO_DEVICE_ID_BROADCOM_4359:
                        /* fallthrough */
                case SDIO_DEVICE_ID_BROADCOM_4354:
--
2.25.0


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