From baef621beda22faa56e7c659ff221d33a6537251 Mon Sep 17 00:00:00 2001
From: Johann Fischer <johann.fischer@nordicsemi.no>
Date: Thu, 29 Dec 2022 01:42:49 +0100
Subject: [PATCH] drivers: udc: add helper functions to set/check endpoint busy
 state

Add helper functions to set and check endpoint busy state.

Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
---
 drivers/usb/udc/udc_common.c     | 19 +++++++++++++++++++
 drivers/usb/udc/udc_common.h     | 20 ++++++++++++++++++++
 include/zephyr/drivers/usb/udc.h |  2 ++
 3 files changed, 41 insertions(+)

diff --git a/drivers/usb/udc/udc_common.c b/drivers/usb/udc/udc_common.c
index 0e23d05b25d..9ecaa8b99be 100644
--- a/drivers/usb/udc/udc_common.c
+++ b/drivers/usb/udc/udc_common.c
@@ -46,6 +46,25 @@ struct udc_ep_config *udc_get_ep_cfg(const struct device *dev, const uint8_t ep)
 	return data->ep_lut[USB_EP_LUT_IDX(ep)];
 }
 
+bool udc_ep_is_busy(const struct device *dev, const uint8_t ep)
+{
+	struct udc_ep_config *ep_cfg;
+
+	ep_cfg = udc_get_ep_cfg(dev, ep);
+	__ASSERT(ep_cfg != NULL, "ep 0x%02x is not available", ep);
+
+	return ep_cfg->stat.busy;
+}
+
+void udc_ep_set_busy(const struct device *dev, const uint8_t ep, const bool busy)
+{
+	struct udc_ep_config *ep_cfg;
+
+	ep_cfg = udc_get_ep_cfg(dev, ep);
+	__ASSERT(ep_cfg != NULL, "ep 0x%02x is not available", ep);
+	ep_cfg->stat.busy = busy;
+}
+
 int udc_register_ep(const struct device *dev, struct udc_ep_config *const cfg)
 {
 	struct udc_data *data = dev->data;
diff --git a/drivers/usb/udc/udc_common.h b/drivers/usb/udc/udc_common.h
index fd8703b2cdd..2807e60250d 100644
--- a/drivers/usb/udc/udc_common.h
+++ b/drivers/usb/udc/udc_common.h
@@ -58,6 +58,26 @@ void udc_set_suspended(const struct device *dev, const bool value);
 struct udc_ep_config *udc_get_ep_cfg(const struct device *dev,
 				     const uint8_t ep);
 
+/**
+ * @brief Checks if the endpoint is busy
+ *
+ * @param[in] dev    Pointer to device struct of the driver instance
+ * @param[in] ep     Endpoint address
+ *
+ * @return true if endpoint is busy
+ */
+bool udc_ep_is_busy(const struct device *dev, const uint8_t ep);
+
+/**
+ * @brief Helper function to set endpoint busy state
+ *
+ * @param[in] dev    Pointer to device struct of the driver instance
+ * @param[in] ep     Endpoint address
+ * @param[in] busy   Busy state
+ */
+void udc_ep_set_busy(const struct device *dev, const uint8_t ep,
+		     const bool busy);
+
 /**
  * @brief Get UDC request from endpoint FIFO.
  *
diff --git a/include/zephyr/drivers/usb/udc.h b/include/zephyr/drivers/usb/udc.h
index 30d1d767646..0f87f357748 100644
--- a/include/zephyr/drivers/usb/udc.h
+++ b/include/zephyr/drivers/usb/udc.h
@@ -80,6 +80,8 @@ struct udc_ep_stat {
 	uint32_t data1 : 1;
 	/** If double buffering is supported, last used buffer is odd */
 	uint32_t odd : 1;
+	/** Endpoint is busy */
+	uint32_t busy : 1;
 };
 
 /**