net: replace CFG_TUD_NET_ENDPOINT_SIZE with actual descriptor-based ep size

examples/device/net_lwip_webserver/src/usb_descriptors.c

@@ -65,17 +65,19 @@ enum {
   CONFIG_ID_COUNT
 };
 
+#if CFG_TUD_NCM
+#define USB_BCD 0x0201
+#else
+#define USB_BCD 0x0200
+#endif
+
 //--------------------------------------------------------------------+
 // Device Descriptors
 //--------------------------------------------------------------------+
 static const tusb_desc_device_t desc_device = {
   .bLength         = sizeof(tusb_desc_device_t),
   .bDescriptorType = TUSB_DESC_DEVICE,
-#if CFG_TUD_NCM
-  .bcdUSB = 0x0201,
-#else
-  .bcdUSB = 0x0200,
-#endif
+  .bcdUSB          = USB_BCD,
   // Use Interface Association Descriptor (IAD) device class
   .bDeviceClass    = TUSB_CLASS_MISC,
   .bDeviceSubClass = MISC_SUBCLASS_COMMON,
@@ -136,57 +138,149 @@ const uint8_t *tud_descriptor_device_cb(void) {
 
 #if CFG_TUD_ECM_RNDIS
 
-static uint8_t const rndis_configuration[] = {
+// full speed configuration
+static uint8_t const rndis_fs_configuration[] = {
   // Config number (index+1), interface count, string index, total length, attribute, power in mA
   TUD_CONFIG_DESCRIPTOR(CONFIG_ID_RNDIS + 1, ITF_NUM_TOTAL, 0, MAIN_CONFIG_TOTAL_LEN, 0, 100),
 
   // Interface number, string index, EP notification address and size, EP data address (out, in) and size.
   TUD_RNDIS_DESCRIPTOR(
-      ITF_NUM_CDC, STRID_INTERFACE, EPNUM_NET_NOTIF, 8, EPNUM_NET_OUT, EPNUM_NET_IN, CFG_TUD_NET_ENDPOINT_SIZE),
+      ITF_NUM_CDC, STRID_INTERFACE, EPNUM_NET_NOTIF, 8, EPNUM_NET_OUT, EPNUM_NET_IN, 64),
 };
 
-static const uint8_t ecm_configuration[] = {
+static const uint8_t ecm_fs_configuration[] = {
   // Config number (index+1), interface count, string index, total length, attribute, power in mA
   TUD_CONFIG_DESCRIPTOR(CONFIG_ID_ECM + 1, ITF_NUM_TOTAL, 0, ALT_CONFIG_TOTAL_LEN, 0, 100),
 
   // Interface number, description string index, MAC address string index, EP notification address and size, EP data address (out, in), and size, max segment size.
   TUD_CDC_ECM_DESCRIPTOR(
       ITF_NUM_CDC, STRID_INTERFACE, STRID_MAC, EPNUM_NET_NOTIF, 64, EPNUM_NET_OUT, EPNUM_NET_IN,
-      CFG_TUD_NET_ENDPOINT_SIZE, CFG_TUD_NET_MTU),
+      64, CFG_TUD_NET_MTU),
 };
 
+#if TUD_OPT_HIGH_SPEED
+// Per USB specs: high speed capable device must report device_qualifier and other_speed_configuration
+
+// high speed configuration
+static uint8_t const rndis_hs_configuration[] = {
+  // Config number (index+1), interface count, string index, total length, attribute, power in mA
+  TUD_CONFIG_DESCRIPTOR(CONFIG_ID_RNDIS + 1, ITF_NUM_TOTAL, 0, MAIN_CONFIG_TOTAL_LEN, 0, 100),
+
+  // Interface number, string index, EP notification address and size, EP data address (out, in) and size.
+  TUD_RNDIS_DESCRIPTOR(
+      ITF_NUM_CDC, STRID_INTERFACE, EPNUM_NET_NOTIF, 8, EPNUM_NET_OUT, EPNUM_NET_IN, 512),
+};
+
+static const uint8_t ecm_hs_configuration[] = {
+  // Config number (index+1), interface count, string index, total length, attribute, power in mA
+  TUD_CONFIG_DESCRIPTOR(CONFIG_ID_ECM + 1, ITF_NUM_TOTAL, 0, ALT_CONFIG_TOTAL_LEN, 0, 100),
+
+  // Interface number, description string index, MAC address string index, EP notification address and size, EP data address (out, in), and size, max segment size.
+  TUD_CDC_ECM_DESCRIPTOR(
+      ITF_NUM_CDC, STRID_INTERFACE, STRID_MAC, EPNUM_NET_NOTIF, 64, EPNUM_NET_OUT, EPNUM_NET_IN,
+      512, CFG_TUD_NET_MTU),
+};
+#endif // highspeed
+
 #else
 
-static uint8_t const ncm_configuration[] = {
+// full speed configuration
+static uint8_t const ncm_fs_configuration[] = {
   // Config number (index+1), interface count, string index, total length, attribute, power in mA
   TUD_CONFIG_DESCRIPTOR(CONFIG_ID_NCM + 1, ITF_NUM_TOTAL, 0, NCM_CONFIG_TOTAL_LEN, 0, 100),
 
-  // Interface number, description string index, MAC address string index, EP notification address and size, EP data address (out, in), and size, max segment size.
+  // Interface number, description string index, MAC address string index, EP notification address and size, EP data address (out, in), and size, max segment size, EP notification bInterval.
   TUD_CDC_NCM_DESCRIPTOR(
       ITF_NUM_CDC, STRID_INTERFACE, STRID_MAC, EPNUM_NET_NOTIF, 64, EPNUM_NET_OUT, EPNUM_NET_IN,
-      CFG_TUD_NET_ENDPOINT_SIZE, CFG_TUD_NET_MTU),
+      64, CFG_TUD_NET_MTU, 50),
 };
 
+#if TUD_OPT_HIGH_SPEED
+// Per USB specs: high speed capable device must report device_qualifier and other_speed_configuration
+
+// high speed configuration
+// bInterval: FS=50 means 50ms; HS encodes as 2^(n-1) * 125us, so 9 = 2^8 * 125us = 32ms
+static uint8_t const ncm_hs_configuration[] = {
+  // Config number (index+1), interface count, string index, total length, attribute, power in mA
+  TUD_CONFIG_DESCRIPTOR(CONFIG_ID_NCM + 1, ITF_NUM_TOTAL, 0, NCM_CONFIG_TOTAL_LEN, 0, 100),
+
+  // Interface number, description string index, MAC address string index, EP notification address and size, EP data address (out, in), and size, max segment size, EP notification bInterval.
+  TUD_CDC_NCM_DESCRIPTOR(
+      ITF_NUM_CDC, STRID_INTERFACE, STRID_MAC, EPNUM_NET_NOTIF, 64, EPNUM_NET_OUT, EPNUM_NET_IN,
+      512, CFG_TUD_NET_MTU, 9),
+};
+#endif // highspeed
+
 #endif
 
 // Configuration array: RNDIS and CDC-ECM
 // - Windows only works with RNDIS
 // - MacOS only works with CDC-ECM
 // - Linux will work on both
-static const uint8_t *const configuration_arr[CONFIG_ID_COUNT] = {
+static const uint8_t *const configuration_fs_arr[CONFIG_ID_COUNT] = {
+#if CFG_TUD_ECM_RNDIS
+  [CONFIG_ID_RNDIS] = rndis_fs_configuration,
+  [CONFIG_ID_ECM]   = ecm_fs_configuration
+#else
+  [CONFIG_ID_NCM] = ncm_fs_configuration
+#endif
+};
+
+#if TUD_OPT_HIGH_SPEED
+static const uint8_t *const configuration_hs_arr[CONFIG_ID_COUNT] = {
 #if CFG_TUD_ECM_RNDIS
-  [CONFIG_ID_RNDIS] = rndis_configuration,
-  [CONFIG_ID_ECM]   = ecm_configuration
+  [CONFIG_ID_RNDIS] = rndis_hs_configuration,
+  [CONFIG_ID_ECM]   = ecm_hs_configuration
 #else
-  [CONFIG_ID_NCM] = ncm_configuration
+  [CONFIG_ID_NCM] = ncm_hs_configuration
 #endif
 };
 
+// device qualifier is mostly similar to device descriptor since we don't change configuration based on speed
+static tusb_desc_device_qualifier_t const desc_device_qualifier = {
+  .bLength            = sizeof(tusb_desc_device_qualifier_t),
+  .bDescriptorType    = TUSB_DESC_DEVICE_QUALIFIER,
+  .bcdUSB             = USB_BCD,
+
+  .bDeviceClass       = TUSB_CLASS_MISC,
+  .bDeviceSubClass    = MISC_SUBCLASS_COMMON,
+  .bDeviceProtocol    = MISC_PROTOCOL_IAD,
+
+  .bMaxPacketSize0    = CFG_TUD_ENDPOINT0_SIZE,
+  .bNumConfigurations = CONFIG_ID_COUNT,
+  .bReserved          = 0x00
+};
+
+// Invoked when received GET DEVICE QUALIFIER DESCRIPTOR request
+// Application return pointer to descriptor, whose contents must exist long enough for transfer to complete.
+// device_qualifier descriptor describes information about a high-speed capable device that would
+// change if the device were operating at the other speed. If not highspeed capable stall this request.
+uint8_t const *tud_descriptor_device_qualifier_cb(void) {
+  return (uint8_t const *) &desc_device_qualifier;
+}
+
+// Invoked when received GET OTHER SEED CONFIGURATION DESCRIPTOR request
+// Application return pointer to descriptor, whose contents must exist long enough for transfer to complete
+// Configuration descriptor in the other speed e.g if high speed then this is for full speed and vice versa
+uint8_t const *tud_descriptor_other_speed_configuration_cb(uint8_t index) {
+  // if link speed is high return fullspeed config, and vice versa
+  const uint8_t *const *arr = (tud_speed_get() == TUSB_SPEED_HIGH) ? configuration_fs_arr : configuration_hs_arr;
+  return (index < CONFIG_ID_COUNT) ? arr[index] : NULL;
+}
+
+#endif // highspeed
+
 // Invoked when received GET CONFIGURATION DESCRIPTOR
 // Application return pointer to descriptor
 // Descriptor contents must exist long enough for transfer to complete
 const uint8_t *tud_descriptor_configuration_cb(uint8_t index) {
-  return (index < CONFIG_ID_COUNT) ? configuration_arr[index] : NULL;
+  if (index >= CONFIG_ID_COUNT) return NULL;
+#if TUD_OPT_HIGH_SPEED
+  // Although we are highspeed, host may be fullspeed.
+  return (tud_speed_get() == TUSB_SPEED_HIGH) ? configuration_hs_arr[index] : configuration_fs_arr[index];
+#else
+  return configuration_fs_arr[index];
+#endif
 }
 
 #if CFG_TUD_NCM

src/class/net/ecm_rndis_device.c

@@ -51,6 +51,7 @@ typedef struct {
   uint8_t ep_notif;
   uint8_t ep_in;
   uint8_t ep_out;
+  uint16_t ep_size;     // bulk endpoint max packet size (IN and OUT assumed equal)
 
   bool ecm_mode;
 
@@ -176,6 +177,9 @@ uint16_t netd_open(uint8_t rhport, tusb_desc_interface_t const * itf_desc, uint1
   // Pair of endpoints
   TU_ASSERT(TUSB_DESC_ENDPOINT == tu_desc_type(p_desc), 0);
 
+  // Save the actual bulk endpoint size (IN and OUT assumed equal)
+  _netd_itf.ep_size = tu_edpt_packet_size((tusb_desc_endpoint_t const *) p_desc);
+
   if (_netd_itf.ecm_mode) {
     // ECM by default is in-active, save the endpoint attribute
     // to open later when received setInterface
@@ -356,8 +360,7 @@ bool netd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint32_
   /* data transmission finished */
   if (ep_addr == _netd_itf.ep_in) {
     /* TinyUSB requires the class driver to implement ZLP (since ZLP usage is class-specific) */
-
-    if (xferred_bytes && (0 == (xferred_bytes % CFG_TUD_NET_ENDPOINT_SIZE))) {
+    if (xferred_bytes && (0 == (xferred_bytes % _netd_itf.ep_size))) {
       do_in_xfer(NULL, 0); /* a ZLP is needed */
     } else {
       /* we're finally finished */

src/class/net/ncm_device.c

@@ -83,6 +83,7 @@ typedef struct {
   uint8_t itf_num;      // interface number
   uint8_t itf_data_alt; // ==0 -> no endpoints, i.e. no network traffic, ==1 -> normal operation with two endpoints (spec, chapter 5.3)
   uint8_t rhport;       // storage of \a rhport because some callbacks are done without it
+  uint16_t ep_size;     // bulk endpoint max packet size (IN and OUT assumed equal)
 
   // recv handling
   recv_ntb_t *recv_free_ntb[RECV_NTB_N];                // free list of recv NTBs
@@ -340,7 +341,8 @@ static xmit_ntb_t *xmit_get_next_ready_ntb(void) {
 static bool xmit_insert_required_zlp(uint8_t rhport, uint32_t xferred_bytes) {
   TU_LOG_DRV("xmit_insert_required_zlp(%d,%ld)\n", rhport, xferred_bytes);
 
-  if (xferred_bytes == 0 || xferred_bytes % CFG_TUD_NET_ENDPOINT_SIZE != 0) {
+  uint16_t const ep_size = ncm_interface.ep_size;
+  if (xferred_bytes == 0 || xferred_bytes % ep_size != 0) {
     return false;
   }
 
@@ -905,6 +907,7 @@ uint16_t netd_open(uint8_t rhport, tusb_desc_interface_t const *itf_desc, uint16
   // a TUSB_DESC_ENDPOINT (actually two) must follow, open these endpoints
   TU_ASSERT(tu_desc_type(p_desc) == TUSB_DESC_ENDPOINT, 0);
   TU_ASSERT(usbd_open_edpt_pair(rhport, p_desc, 2, TUSB_XFER_BULK, &ncm_interface.ep_out, &ncm_interface.ep_in));
+  ncm_interface.ep_size = tu_edpt_packet_size((tusb_desc_endpoint_t const *) p_desc);
   drv_len += 2 * sizeof(tusb_desc_endpoint_t);
 
   return drv_len;

src/class/net/net_device.h

@@ -35,9 +35,6 @@
 #error "Cannot enable both ECM_RNDIS and NCM network drivers"
 #endif
 
-/* declared here, NOT in usb_descriptors.c, so that the driver can intelligently ZLP as needed */
-#define CFG_TUD_NET_ENDPOINT_SIZE (TUD_OPT_HIGH_SPEED ? 512 : 64)
-
 /* Maximum Transmission Unit (in bytes) of the network, including Ethernet header */
 #ifndef CFG_TUD_NET_MTU
 #define CFG_TUD_NET_MTU           1514

src/device/usbd.h

@@ -1026,9 +1026,9 @@ bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_requ
 // Length of template descriptor
 #define TUD_CDC_NCM_DESC_LEN  (8+9+5+5+13+6+7+9+9+7+7)
 
-// CDC-ECM Descriptor Template
-// Interface number, description string index, MAC address string index, EP notification address and size, EP data address (out, in), and size, max segment size.
-#define TUD_CDC_NCM_DESCRIPTOR(_itfnum, _desc_stridx, _mac_stridx, _ep_notif, _ep_notif_size, _epout, _epin, _epsize, _maxsegmentsize) \
+// CDC-NCM Descriptor Template
+// Interface number, description string index, MAC address string index, EP notification address and size, EP data address (out, in), size, max segment size, EP notification bInterval.
+#define TUD_CDC_NCM_DESCRIPTOR(_itfnum, _desc_stridx, _mac_stridx, _ep_notif, _ep_notif_size, _epout, _epin, _epsize, _maxsegmentsize, _ep_notif_interval) \
   /* Interface Association */\
   8, TUSB_DESC_INTERFACE_ASSOCIATION, _itfnum, 2, TUSB_CLASS_CDC, CDC_COMM_SUBCLASS_NETWORK_CONTROL_MODEL, 0, 0,\
   /* CDC Control Interface */\
@@ -1042,7 +1042,7 @@ bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_requ
   /* CDC-NCM Functional Descriptor */\
   6, TUSB_DESC_CS_INTERFACE, CDC_FUNC_DESC_NCM, U16_TO_U8S_LE(0x0100), 0, \
   /* Endpoint Notification */\
-  7, TUSB_DESC_ENDPOINT, _ep_notif, TUSB_XFER_INTERRUPT, U16_TO_U8S_LE(_ep_notif_size), 50,\
+  7, TUSB_DESC_ENDPOINT, _ep_notif, TUSB_XFER_INTERRUPT, U16_TO_U8S_LE(_ep_notif_size), _ep_notif_interval,\
   /* CDC Data Interface (default inactive) */\
   9, TUSB_DESC_INTERFACE, (uint8_t)((_itfnum)+1), 0, 0, TUSB_CLASS_CDC_DATA, 0, NCM_DATA_PROTOCOL_NETWORK_TRANSFER_BLOCK, 0,\
   /* CDC Data Interface (alternative active) */\