usb: dwc2: gadget: Reject LPM token during Control transfers

usb: dwc2: gadget: Reject LPM token during Control transfers

[Minas Harutyunyan]

Avoiding switch to L1 state in any stage of control transfers.
Send NYET handshake to LPM token.

Renamed GLPMCFG_LPM_ACCEPT_CTRL_ISOC to GLPMCFG_LPM_REJECT_CTRL_CONTROL
because by setting this bit core reject LPM token.

Signed-off-by: Minas Harutyunyan <hminas@synopsys.com>
---
 drivers/usb/dwc2/gadget.c | 1 +
 drivers/usb/dwc2/hw.h     | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 6812a8a3a98b..6ac850d6ad44 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -5073,6 +5073,7 @@ void dwc2_gadget_init_lpm(struct dwc2_hsotg *hsotg)
 	val |= hsotg->params.lpm_clock_gating ? GLPMCFG_ENBLSLPM : 0;
 	val |= hsotg->params.hird_threshold << GLPMCFG_HIRD_THRES_SHIFT;
 	val |= hsotg->params.besl ? GLPMCFG_ENBESL : 0;
+	val |= GLPMCFG_LPM_REJECT_CTRL_CONTROL;
 	val |= GLPMCFG_LPM_ACCEPT_CTRL_ISOC;
 	dwc2_writel(hsotg, val, GLPMCFG);
 	dev_dbg(hsotg->dev, "GLPMCFG=0x%08x\n", dwc2_readl(hsotg, GLPMCFG));
diff --git a/drivers/usb/dwc2/hw.h b/drivers/usb/dwc2/hw.h
index 98af924a9a5c..1bc394dcfa9d 100644
--- a/drivers/usb/dwc2/hw.h
+++ b/drivers/usb/dwc2/hw.h
@@ -333,7 +333,7 @@
 #define GLPMCFG_SNDLPM			BIT(24)
 #define GLPMCFG_RETRY_CNT_MASK		(0x7 << 21)
 #define GLPMCFG_RETRY_CNT_SHIFT		21
-#define GLPMCFG_LPM_ACCEPT_CTRL_CONTROL	BIT(21)
+#define GLPMCFG_LPM_REJECT_CTRL_CONTROL	BIT(21)
 #define GLPMCFG_LPM_ACCEPT_CTRL_ISOC	BIT(22)
 #define GLPMCFG_LPM_CHNL_INDX_MASK	(0xf << 17)
 #define GLPMCFG_LPM_CHNL_INDX_SHIFT	17

[PATCH] usb: dwc2: gadget: Reject LPM token during Control transfers

[Minas Harutyunyan]

Avoiding switch to L1 state in any stage of control transfers.
Send NYET handshake to LPM token.

Renamed GLPMCFG_LPM_ACCEPT_CTRL_ISOC to GLPMCFG_LPM_REJECT_CTRL_CONTROL
because by setting this bit core reject LPM token.

Signed-off-by: Minas Harutyunyan <hminas@synopsys.com>
---
 drivers/usb/dwc2/gadget.c | 1 +
 drivers/usb/dwc2/hw.h     | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 6812a8a3a98b..6ac850d6ad44 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -5073,6 +5073,7 @@ void dwc2_gadget_init_lpm(struct dwc2_hsotg *hsotg)
 	val |= hsotg->params.lpm_clock_gating ? GLPMCFG_ENBLSLPM : 0;
 	val |= hsotg->params.hird_threshold << GLPMCFG_HIRD_THRES_SHIFT;
 	val |= hsotg->params.besl ? GLPMCFG_ENBESL : 0;
+	val |= GLPMCFG_LPM_REJECT_CTRL_CONTROL;
 	val |= GLPMCFG_LPM_ACCEPT_CTRL_ISOC;
 	dwc2_writel(hsotg, val, GLPMCFG);
 	dev_dbg(hsotg->dev, "GLPMCFG=0x%08x\n", dwc2_readl(hsotg, GLPMCFG));
diff --git a/drivers/usb/dwc2/hw.h b/drivers/usb/dwc2/hw.h
index 98af924a9a5c..1bc394dcfa9d 100644
--- a/drivers/usb/dwc2/hw.h
+++ b/drivers/usb/dwc2/hw.h
@@ -333,7 +333,7 @@
 #define GLPMCFG_SNDLPM			BIT(24)
 #define GLPMCFG_RETRY_CNT_MASK		(0x7 << 21)
 #define GLPMCFG_RETRY_CNT_SHIFT		21
-#define GLPMCFG_LPM_ACCEPT_CTRL_CONTROL	BIT(21)
+#define GLPMCFG_LPM_REJECT_CTRL_CONTROL	BIT(21)
 #define GLPMCFG_LPM_ACCEPT_CTRL_ISOC	BIT(22)
 #define GLPMCFG_LPM_CHNL_INDX_MASK	(0xf << 17)
 #define GLPMCFG_LPM_CHNL_INDX_SHIFT	17
-- 
2.11.0