add tuh_descriptor_hid_report_get()

3 files changed, 26 insertions, 16 deletions

diff --git a/src/class/hid/hid_host.c b/src/class/hid/hid_host.c
index 9190642c6..32bb775b0 100644
--- a/src/class/hid/hid_host.c
+++ b/src/class/hid/hid_host.c
@@ -409,22 +409,7 @@ static bool config_get_report_desc(uint8_t dev_addr, tusb_control_request_t cons
     config_driver_mount_complete(dev_addr, instance, NULL, 0);
   }else
   {
-    TU_LOG2("HID Get Report Descriptor\r\n");
-    tusb_control_request_t const new_request =
-    {
-      .bmRequestType_bit =
-      {
-        .recipient = TUSB_REQ_RCPT_INTERFACE,
-        .type      = TUSB_REQ_TYPE_STANDARD,
-        .direction = TUSB_DIR_IN
-      },
-      .bRequest = TUSB_REQ_GET_DESCRIPTOR,
-      .wValue   = tu_u16(hid_itf->report_desc_type, 0),
-      .wIndex   = itf_num,
-      .wLength  = hid_itf->report_desc_len
-    };
-
-    TU_ASSERT(tuh_control_xfer(dev_addr, &new_request, usbh_get_enum_buf(), config_get_report_desc_complete));
+    TU_ASSERT(tuh_descriptor_hid_report_get(dev_addr, itf_num, hid_itf->report_desc_type, usbh_get_enum_buf(), hid_itf->report_desc_len, config_get_report_desc_complete));
   }
 
   return true;
diff --git a/src/host/usbh.c b/src/host/usbh.c
index 192979ce6..b047179c5 100644
--- a/src/host/usbh.c
+++ b/src/host/usbh.c
@@ -299,6 +299,7 @@ bool tuh_descriptor_get(uint8_t daddr, uint8_t type, uint8_t index, void* buffer
 
 bool tuh_descriptor_device_get(uint8_t daddr, void* buffer, uint16_t len, tuh_control_complete_cb_t complete_cb)
 {
+  len = tu_min16(len, sizeof(tusb_desc_device_t));
   return tuh_descriptor_get(daddr, TUSB_DESC_DEVICE, 0, buffer, len, complete_cb);
 }
 
@@ -361,6 +362,27 @@ bool tuh_descriptor_string_serial_get(uint8_t daddr, uint16_t language_id, void*
   return tuh_descriptor_string_get(daddr, language_id, dev->i_serial, buffer, len, complete_cb);
 }
 
+// Get HID report descriptor
+bool tuh_descriptor_hid_report_get(uint8_t daddr, uint8_t itf_num, uint8_t desc_type, void* buffer, uint16_t len, tuh_control_complete_cb_t complete_cb)
+{
+  TU_LOG2("HID Get Report Descriptor\r\n");
+  tusb_control_request_t const request =
+  {
+    .bmRequestType_bit =
+    {
+      .recipient = TUSB_REQ_RCPT_INTERFACE,
+      .type      = TUSB_REQ_TYPE_STANDARD,
+      .direction = TUSB_DIR_IN
+    },
+    .bRequest = TUSB_REQ_GET_DESCRIPTOR,
+    .wValue   = tu_htole16(TU_U16(desc_type, 0)),
+    .wIndex   = itf_num,
+    .wLength  = len
+  };
+
+  return tuh_control_xfer(daddr, &request, buffer, complete_cb);
+}
+
 bool tuh_configuration_set(uint8_t daddr, uint8_t config_num, tuh_control_complete_cb_t complete_cb)
 {
   TU_LOG2("Set Configuration = %d\r\n", config_num);
diff --git a/src/host/usbh.h b/src/host/usbh.h
index 9465d1d1b..6fea2fac5 100644
--- a/src/host/usbh.h
+++ b/src/host/usbh.h
@@ -112,6 +112,9 @@ bool tuh_descriptor_string_product_get(uint8_t daddr, uint16_t language_id, void
 // Get serial string descriptor
 bool tuh_descriptor_string_serial_get(uint8_t daddr, uint16_t language_id, void* buffer, uint16_t len, tuh_control_complete_cb_t complete_cb);
 
+// Get HID report descriptor
+bool tuh_descriptor_hid_report_get(uint8_t daddr, uint8_t itf_num, uint8_t desc_type,  void* buffer, uint16_t len, tuh_control_complete_cb_t complete_cb);
+
 //--------------------------------------------------------------------+
 // APPLICATION CALLBACK
 //--------------------------------------------------------------------+