Commit f95a8d9c authored by Naveen Gupta's avatar Naveen Gupta Committed by Kalle Valo

brcmfmac: update 43012 F2 watermark setting to fix DMA Error during UDP RX Traffic

The number of words that the read FIFO has to contain except
the end of frame before sends data back to the host.
Max watermark = (512B - 2* (BurstLength))/4 =
(512 - 128)/4 = 384/4 = 0x60
so if burst length (i.e. BurstLength = 64) is increased,
watermark has to be reduced. This is the optimal setting for this chip.
Reviewed-by: default avatarArend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: default avatarNaveen Gupta <naveen.gupta@cypress.com>
Signed-off-by: default avatarChi-Hsien Lin <chi-hsien.lin@cypress.com>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
parent b021a6bc
...@@ -52,6 +52,7 @@ ...@@ -52,6 +52,7 @@
/* watermark expressed in number of words */ /* watermark expressed in number of words */
#define DEFAULT_F2_WATERMARK 0x8 #define DEFAULT_F2_WATERMARK 0x8
#define CY_4373_F2_WATERMARK 0x40 #define CY_4373_F2_WATERMARK 0x40
#define CY_43012_F2_WATERMARK 0x60
#ifdef DEBUG #ifdef DEBUG
...@@ -4173,6 +4174,17 @@ static void brcmf_sdio_firmware_callback(struct device *dev, int err, ...@@ -4173,6 +4174,17 @@ static void brcmf_sdio_firmware_callback(struct device *dev, int err,
CY_4373_F2_WATERMARK | CY_4373_F2_WATERMARK |
SBSDIO_MESBUSYCTRL_ENAB, &err); SBSDIO_MESBUSYCTRL_ENAB, &err);
break; break;
case SDIO_DEVICE_ID_CYPRESS_43012:
brcmf_dbg(INFO, "set F2 watermark to 0x%x*4 bytes\n",
CY_43012_F2_WATERMARK);
brcmf_sdiod_writeb(sdiod, SBSDIO_WATERMARK,
CY_43012_F2_WATERMARK, &err);
devctl = brcmf_sdiod_readb(sdiod, SBSDIO_DEVICE_CTL,
&err);
devctl |= SBSDIO_DEVCTL_F2WM_ENAB;
brcmf_sdiod_writeb(sdiod, SBSDIO_DEVICE_CTL, devctl,
&err);
break;
default: default:
brcmf_sdiod_writeb(sdiod, SBSDIO_WATERMARK, brcmf_sdiod_writeb(sdiod, SBSDIO_WATERMARK,
DEFAULT_F2_WATERMARK, &err); DEFAULT_F2_WATERMARK, &err);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment