[PATCH 1/2] usb: dwc3: calculate the number of endpoints

[Felipe Balbi <balbi@xxxxxx>]

hwparams2 holds the number of endpoints which
were selected during RTL generation, we can
use that on our driver.

Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
 drivers/usb/dwc3/core.c | 13 +++++++++++++
 drivers/usb/dwc3/core.h | 15 +++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index c6a46e0..66c0572 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -260,6 +260,17 @@ static void dwc3_event_buffers_cleanup(struct dwc3 *dwc)
 	}
 }
 
+static void dwc3_core_num_eps(struct dwc3 *dwc)
+{
+	struct dwc3_hwparams	*parms = &dwc->hwparams;
+
+	dwc->num_in_eps = DWC3_NUM_IN_EPS(parms);
+	dwc->num_out_eps = DWC3_NUM_EPS(parms) - dwc->num_in_eps;
+
+	dev_vdbg(dwc->dev, "found %d IN and %d OUT endpoints\n",
+			dwc->num_in_eps, dwc->num_out_eps);
+}
+
 static void dwc3_cache_hwparams(struct dwc3 *dwc)
 {
 	struct dwc3_hwparams	*parms = &dwc->hwparams;
@@ -336,6 +347,8 @@ static int dwc3_core_init(struct dwc3 *dwc)
 	if (dwc->revision < DWC3_REVISION_190A)
 		reg |= DWC3_GCTL_U2RSTECN;
 
+	dwc3_core_num_eps(dwc);
+
 	dwc3_writel(dwc->regs, DWC3_GCTL, reg);
 
 	return 0;
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index ad2ffac..b42f71c 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -575,6 +575,14 @@ struct dwc3_hwparams {
 /* HWPARAMS1 */
 #define DWC3_NUM_INT(n)		(((n) & (0x3f << 15)) >> 15)
 
+/* HWPARAMS3 */
+#define DWC3_NUM_IN_EPS_MASK	(0x1f << 18)
+#define DWC3_NUM_EPS_MASK	(0x3f << 12)
+#define DWC3_NUM_EPS(p)		(((p)->hwparams3 &		\
+			(DWC3_NUM_EPS_MASK)) >> 12)
+#define DWC3_NUM_IN_EPS(p)	(((p)->hwparams3 &		\
+			(DWC3_NUM_IN_EPS_MASK)) >> 18)
+
 /* HWPARAMS7 */
 #define DWC3_RAM1_DEPTH(n)	((n) & 0xffff)
 
@@ -641,6 +649,8 @@ struct dwc3_scratchpad_array {
  * @u2pel: parameter from Set SEL request.
  * @u1sel: parameter from Set SEL request.
  * @u1pel: parameter from Set SEL request.
+ * @num_out_eps: number of out endpoints
+ * @num_in_eps: number of in endpoints
  * @ep0_next_event: hold the next expected event
  * @ep0state: state of endpoint zero
  * @link_state: link state
@@ -658,8 +668,10 @@ struct dwc3 {
 	dma_addr_t		ep0_trb_addr;
 	dma_addr_t		ep0_bounce_addr;
 	struct dwc3_request	ep0_usb_req;
+
 	/* device lock */
 	spinlock_t		lock;
+
 	struct device		*dev;
 
 	struct platform_device	*xhci;
@@ -727,6 +739,9 @@ struct dwc3 {
 
 	u8			speed;
 
+	u8			num_out_eps;
+	u8			num_in_eps;
+
 	void			*mem;
 
 	struct dwc3_hwparams	hwparams;
-- 
1.8.1.rc1.5.g7e0651a

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