feat(class/usbh_hid): add usbh_hid_get_protocol api

Signed-off-by: sakumisu <[email protected]>

2 files changed, 26 insertions, 0 deletions

diff --git a/class/hid/usbh_hid.c b/class/hid/usbh_hid.c
index 0fd58abb..ac454cb3 100644
--- a/class/hid/usbh_hid.c
+++ b/class/hid/usbh_hid.c
@@ -128,6 +128,30 @@ int usbh_hid_set_protocol(struct usbh_hid *hid_class, uint8_t protocol)
     return usbh_control_transfer(hid_class->hport, setup, NULL);
 }
 
+int usbh_hid_get_protocol(struct usbh_hid *hid_class, uint8_t *protocol)
+{
+    struct usb_setup_packet *setup;
+    int ret;
+
+    if (!hid_class || !hid_class->hport) {
+        return -USB_ERR_INVAL;
+    }
+    setup = hid_class->hport->setup;
+
+    setup->bmRequestType = USB_REQUEST_DIR_IN | USB_REQUEST_CLASS | USB_REQUEST_RECIPIENT_INTERFACE;
+    setup->bRequest = HID_REQUEST_GET_PROTOCOL;
+    setup->wValue = 0;
+    setup->wIndex = hid_class->intf;
+    setup->wLength = 1;
+
+    ret = usbh_control_transfer(hid_class->hport, setup, g_hid_buf[hid_class->minor]);
+    if (ret < 8) {
+        return ret;
+    }
+    memcpy(protocol, g_hid_buf[hid_class->minor], ret - 8);
+    return ret;
+}
+
 int usbh_hid_set_report(struct usbh_hid *hid_class, uint8_t report_type, uint8_t report_id, uint8_t *buffer, uint32_t buflen)
 {
     struct usb_setup_packet *setup;
diff --git a/class/hid/usbh_hid.h b/class/hid/usbh_hid.h
index 5e8fce61..8b87e0c0 100644
--- a/class/hid/usbh_hid.h
+++ b/class/hid/usbh_hid.h
@@ -31,6 +31,8 @@ extern "C" {
 int usbh_hid_get_report_descriptor(struct usbh_hid *hid_class, uint8_t *buffer, uint32_t buflen);
 int usbh_hid_set_idle(struct usbh_hid *hid_class, uint8_t report_id, uint8_t duration);
 int usbh_hid_get_idle(struct usbh_hid *hid_class, uint8_t *buffer);
+int usbh_hid_set_protocol(struct usbh_hid *hid_class, uint8_t protocol);
+int usbh_hid_get_protocol(struct usbh_hid *hid_class, uint8_t *protocol);
 int usbh_hid_set_report(struct usbh_hid *hid_class, uint8_t report_type, uint8_t report_id, uint8_t *buffer, uint32_t buflen);
 int usbh_hid_get_report(struct usbh_hid *hid_class, uint8_t report_type, uint8_t report_id, uint8_t *buffer, uint32_t buflen);