this helper will be used, initially, to dump space
of different queues and fifos in dwc3 to
debugfs. Later, it'll be used to issue remote wakeup
when we want to start a transfer and there's
something in a TX FIFO.
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
---
drivers/usb/dwc3/core.c | 14 ++++++++++++++
drivers/usb/dwc3/core.h | 14 ++++++++++++++
2 files changed, 28 insertions(+)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index e35a262fdf01..a590cd225bb7 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -60,6 +60,20 @@ void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
}
+u32 dwc3_core_fifo_space(struct dwc3_ep *dep, u8 type)
+{
+ struct dwc3 *dwc = dep->dwc;
+ u32 reg;
+
+ dwc3_writel(dwc->regs, DWC3_GDBGFIFOSPACE,
+ DWC3_GDBGFIFOSPACE_NUM(dep->number) |
+ DWC3_GDBGFIFOSPACE_TYPE(type));
+
+ reg = dwc3_readl(dwc->regs, DWC3_GDBGFIFOSPACE);
+
+ return DWC3_GDBGFIFOSPACE_SPACE_AVAILABLE(reg);
+}
+
/**
* dwc3_core_soft_reset - Issues core soft reset and PHY reset
* @dwc: pointer to our context structure
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 832da3f2e03a..c3ea4270bf33 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -152,6 +152,19 @@
/* Bit fields */
+/* Global Debug Queue/FIFO Space Available Register */
+#define DWC3_GDBGFIFOSPACE_NUM(n) ((n) & 0x1f)
+#define DWC3_GDBGFIFOSPACE_TYPE(n) (((n) << 5) & 0x1e0)
+#define DWC3_GDBGFIFOSPACE_SPACE_AVAILABLE(n) (((n) >> 16) & 0xffff)
+
+#define DWC3_TXFIFOQ 1
+#define DWC3_RXFIFOQ 3
+#define DWC3_TXREQQ 5
+#define DWC3_RXREQQ 7
+#define DWC3_RXINFOQ 9
+#define DWC3_DESCFETCHQ 13
+#define DWC3_EVENTQ 15
+
/* Global Configuration Register */
#define DWC3_GCTL_PWRDNSCALE(n) ((n) << 19)
#define DWC3_GCTL_U2RSTECN (1 << 16)
@@ -1043,6 +1056,7 @@ struct dwc3_gadget_ep_cmd_params {
/* prototypes */
void dwc3_set_mode(struct dwc3 *dwc, u32 mode);
+u32 dwc3_core_fifo_space(struct dwc3_ep *dep, u8 type);
/* check whether we are on the DWC_usb31 core */
static inline bool dwc3_is_usb31(struct dwc3 *dwc)
--
2.8.0.rc2
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