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50 lines
1.8 KiB
Diff
50 lines
1.8 KiB
Diff
From f95a8d9c6aca196f1ace5b2e53a3dd3bc491b1b3 Mon Sep 17 00:00:00 2001
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From: Naveen Gupta <naveen.gupta@cypress.com>
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Date: Wed, 21 Nov 2018 07:53:49 +0000
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Subject: [PATCH] brcmfmac: update 43012 F2 watermark setting to fix DMA Error
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during UDP RX Traffic
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The number of words that the read FIFO has to contain except
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the end of frame before sends data back to the host.
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Max watermark = (512B - 2* (BurstLength))/4 =
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(512 - 128)/4 = 384/4 = 0x60
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so if burst length (i.e. BurstLength = 64) is increased,
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watermark has to be reduced. This is the optimal setting for this chip.
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Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>
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Signed-off-by: Naveen Gupta <naveen.gupta@cypress.com>
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Signed-off-by: Chi-Hsien Lin <chi-hsien.lin@cypress.com>
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Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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---
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.../net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 12 ++++++++++++
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1 file changed, 12 insertions(+)
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--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
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+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
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@@ -52,6 +52,7 @@
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/* watermark expressed in number of words */
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#define DEFAULT_F2_WATERMARK 0x8
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#define CY_4373_F2_WATERMARK 0x40
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+#define CY_43012_F2_WATERMARK 0x60
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#ifdef DEBUG
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@@ -4173,6 +4174,17 @@ static void brcmf_sdio_firmware_callback
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CY_4373_F2_WATERMARK |
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SBSDIO_MESBUSYCTRL_ENAB, &err);
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break;
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+ case SDIO_DEVICE_ID_CYPRESS_43012:
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+ brcmf_dbg(INFO, "set F2 watermark to 0x%x*4 bytes\n",
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+ CY_43012_F2_WATERMARK);
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+ brcmf_sdiod_writeb(sdiod, SBSDIO_WATERMARK,
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+ CY_43012_F2_WATERMARK, &err);
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+ devctl = brcmf_sdiod_readb(sdiod, SBSDIO_DEVICE_CTL,
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+ &err);
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+ devctl |= SBSDIO_DEVCTL_F2WM_ENAB;
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+ brcmf_sdiod_writeb(sdiod, SBSDIO_DEVICE_CTL, devctl,
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+ &err);
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+ break;
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default:
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brcmf_sdiod_writeb(sdiod, SBSDIO_WATERMARK,
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DEFAULT_F2_WATERMARK, &err);
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