[PATCH v0 1/3] ata: Fix the watermark threshold for the APM X-Gene SATA host controller driver.
From: Suman Tripathi <hidden>
Date: 2014-06-20 08:32:25
Also in:
linux-devicetree, linux-scsi
Subsystem:
libata subsystem (serial and parallel ata drivers), the rest · Maintainers:
Damien Le Moal, Niklas Cassel, Linus Torvalds
This patch fixes the watermark threshold of the receive FIFO for the APM X-Gene SATA host controller driver. Signed-off-by: Loc Ho <redacted> Signed-off-by: Suman Tripathi <redacted> --- drivers/ata/ahci_xgene.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/ata/ahci_xgene.c b/drivers/ata/ahci_xgene.c
index 77c89bf..5f0f750 100644
--- a/drivers/ata/ahci_xgene.c
+++ b/drivers/ata/ahci_xgene.c@@ -68,6 +68,10 @@ #define PORTAXICFG_OUTTRANS_SET(dst, src) \ (((dst) & ~0x00f00000) | (((u32)(src) << 0x14) & 0x00f00000)) +#define PORTRANSCFG 0xc8 +#define PORTRANSCFG_RXWM_SET(dst, src) \ + (((dst) & ~0x0000007f) | (((u32) (src) << 0) & 0x0000007f)) + /* SATA host controller AXI CSR */ #define INT_SLV_TMOMASK 0x00000010
@@ -176,6 +180,10 @@ static void xgene_ahci_set_phy_cfg(struct xgene_ahci_context *ctx, int channel) val = PORTAXICFG_OUTTRANS_SET(val, 0xe); /* Set outstanding */ writel(val, mmio + PORTAXICFG); readl(mmio + PORTAXICFG); /* Force a barrier */ + /* Set the watermark threshold of the receive FIFO */ + val = readl(mmio + PORTRANSCFG); + val = PORTRANSCFG_RXWM_SET(val, 0x30); + writel(val, mmio + PORTRANSCFG); } /** --
1.8.2.1