usb: dwc3: Implement interrupt moderation
Implement interrupt moderation which allows the interrupt rate to be
throttled. To enable this feature the dwc->imod_interval must be set to
1 or greater. This value specifies the minimum inter-interrupt interval,
in 250 ns increments. A value of 0 disables interrupt moderation.
This applies for DWC_usb3 version 3.00a and higher and for DWC_usb31
version 1.20a and higher.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index bf63756..ef81fa5 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -67,6 +67,7 @@
#define DWC3_DEVICE_EVENT_OVERFLOW 11
#define DWC3_GEVNTCOUNT_MASK 0xfffc
+#define DWC3_GEVNTCOUNT_EHB (1 << 31)
#define DWC3_GSNPSID_MASK 0xffff0000
#define DWC3_GSNPSREV_MASK 0xffff
@@ -149,6 +150,8 @@
#define DWC3_DEPCMDPAR0 0x08
#define DWC3_DEPCMD 0x0c
+#define DWC3_DEV_IMOD(n) (0xca00 + (n * 0x4))
+
/* OTG Registers */
#define DWC3_OCFG 0xcc00
#define DWC3_OCTL 0xcc04
@@ -465,6 +468,11 @@
#define DWC3_DEPCMD_TYPE_BULK 2
#define DWC3_DEPCMD_TYPE_INTR 3
+#define DWC3_DEV_IMOD_COUNT_SHIFT 16
+#define DWC3_DEV_IMOD_COUNT_MASK (0xffff << 16)
+#define DWC3_DEV_IMOD_INTERVAL_SHIFT 0
+#define DWC3_DEV_IMOD_INTERVAL_MASK (0xffff << 0)
+
/* Structures */
struct dwc3_trb;
@@ -846,6 +854,8 @@ struct dwc3_scratchpad_array {
* 1 - -3.5dB de-emphasis
* 2 - No de-emphasis
* 3 - Reserved
+ * @imod_interval: set the interrupt moderation interval in 250ns
+ * increments or 0 to disable.
*/
struct dwc3 {
struct usb_ctrlrequest *ctrl_req;
@@ -933,6 +943,7 @@ struct dwc3 {
*/
#define DWC3_REVISION_IS_DWC31 0x80000000
#define DWC3_USB31_REVISION_110A (0x3131302a | DWC3_REVISION_IS_DWC31)
+#define DWC3_USB31_REVISION_120A (0x3132302a | DWC3_REVISION_IS_DWC31)
enum dwc3_ep0_next ep0_next_event;
enum dwc3_ep0_state ep0state;
@@ -991,6 +1002,8 @@ struct dwc3 {
unsigned tx_de_emphasis_quirk:1;
unsigned tx_de_emphasis:2;
+
+ u16 imod_interval;
};
/* -------------------------------------------------------------------------- */
@@ -1162,6 +1175,8 @@ static inline bool dwc3_is_usb31(struct dwc3 *dwc)
return !!(dwc->revision & DWC3_REVISION_IS_DWC31);
}
+bool dwc3_has_imod(struct dwc3 *dwc);
+
#if IS_ENABLED(CONFIG_USB_DWC3_HOST) || IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)
int dwc3_host_init(struct dwc3 *dwc);
void dwc3_host_exit(struct dwc3 *dwc);