[v4,11/15] usb: dwc3: Track DWC_usb31 VERSIONTYPE

[Thinh Nguyen <Thinh.Nguyen@synopsys.com>]

Add a new field to dwc3 structure to track VERSIONTYPE. The VERSIONTYPE
is represented in ASCII in the 32-bit VERSIONTYPE register. In
DWC_usb31, sub releases for each version are tracked with VERSIONTYPE
such as "ea01" and "ea02".

Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
---
 drivers/usb/dwc3/core.c | 2 ++
 drivers/usb/dwc3/core.h | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 92f9fe7312c3..ddcfa2a60d4b 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -642,6 +642,7 @@ static bool dwc3_core_is_valid(struct dwc3 *dwc)
 {
 	u32 reg;
 
+	dwc->ver_type = 0;
 	reg = dwc3_readl(dwc->regs, DWC3_GSNPSID);
 
 	/* This should read as U3 followed by revision number */
@@ -652,6 +653,7 @@ static bool dwc3_core_is_valid(struct dwc3 *dwc)
 		/* Detected DWC_usb31 IP */
 		dwc->revision = dwc3_readl(dwc->regs, DWC3_VER_NUMBER);
 		dwc->revision |= DWC3_REVISION_IS_DWC31;
+		dwc->ver_type = dwc3_readl(dwc->regs, DWC3_VER_TYPE);
 	} else {
 		return false;
 	}
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index fd794972802d..71cf53a06e49 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -810,6 +810,7 @@ struct dwc3_scratchpad_array {
  * @u1u2: only used on revisions <1.83a for workaround
  * @maximum_speed: maximum speed requested (mainly for testing purposes)
  * @revision: revision register contents
+ * @ver_type: VERSIONTYPE register contents, a sub release of a revision
  * @dr_mode: requested mode of operation
  * @current_dr_role: current role of operation when in dual-role mode
  * @desired_dr_role: desired role of operation when in dual-role mode
@@ -982,6 +983,10 @@ struct dwc3 {
 #define DWC3_USB31_REVISION_110A	(0x3131302a | DWC3_REVISION_IS_DWC31)
 #define DWC3_USB31_REVISION_120A	(0x3132302a | DWC3_REVISION_IS_DWC31)
 
+	u32			ver_type;
+
+#define DWC31_VERSIONTYPE_EA01		0x65613031
+
 	enum dwc3_ep0_next	ep0_next_event;
 	enum dwc3_ep0_state	ep0state;
 	enum dwc3_link_state	link_state;