diff mbox series

[v2,08/11] scsi: ufs: exynos: enable write line unique transactions on gs101

Message ID 20241025131442.112862-9-peter.griffin@linaro.org (mailing list archive)
State New
Headers show
Series UFS cleanups and enhancements to ufs-exynos for gs101 | expand

Commit Message

Peter Griffin Oct. 25, 2024, 1:14 p.m. UTC 
Previously just AXIDMA_RWDATA_BURST_LEN[3:0] field was set to 8.

To enable WLU transaction additionally we need to set Write Line
Unique enable [31], Write Line Unique Burst Length [30:27] and
AXIDMA_RWDATA_BURST_LEN[3:0].

To support WLU transaction, both burth length fields need to be 0x3.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
 drivers/ufs/host/ufs-exynos.c | 8 ++++++++
 1 file changed, 8 insertions(+)
diff mbox series

Patch

diff --git a/drivers/ufs/host/ufs-exynos.c b/drivers/ufs/host/ufs-exynos.c
index 40b2563fe011..b0cbb147c7a1 100644
--- a/drivers/ufs/host/ufs-exynos.c
+++ b/drivers/ufs/host/ufs-exynos.c
@@ -48,6 +48,8 @@ 
 #define HCI_UNIPRO_APB_CLK_CTRL	0x68
 #define UNIPRO_APB_CLK(v, x)	(((v) & ~0xF) | ((x) & 0xF))
 #define HCI_AXIDMA_RWDATA_BURST_LEN	0x6C
+#define WLU_EN			BIT(31)
+#define WLU_BURST_LEN(x)	((x) << 27 | ((x) & 0xF))
 #define HCI_GPIO_OUT		0x70
 #define HCI_ERR_EN_PA_LAYER	0x78
 #define HCI_ERR_EN_DL_LAYER	0x7C
@@ -1925,6 +1927,12 @@  static int gs101_ufs_post_link(struct exynos_ufs *ufs)
 {
 	struct ufs_hba *hba = ufs->hba;
 
+	/*
+	 * Enable Write Line Unique. This field has to be 0x3
+	 * to support Write Line Unique transaction on gs101.
+	 */
+	hci_writel(ufs, WLU_EN | WLU_BURST_LEN(3), HCI_AXIDMA_RWDATA_BURST_LEN);
+
 	exynos_ufs_enable_dbg_mode(hba);
 	ufshcd_dme_set(hba, UIC_ARG_MIB(PA_SAVECONFIGTIME), 0x3e8);
 	exynos_ufs_disable_dbg_mode(hba);