more with -Wcast-qual

34 files changed, 70 insertions, 48 deletions

diff --git a/examples/device/cdc_msc_freertos/Makefile b/examples/device/cdc_msc_freertos/Makefile
index 677dcac9c..a155d6cb7 100644
--- a/examples/device/cdc_msc_freertos/Makefile
+++ b/examples/device/cdc_msc_freertos/Makefile
@@ -29,6 +29,9 @@ SRC_C += \
 	$(FREERTOS_SRC)/timers.c \
 	$(subst ../../../,,$(wildcard ../../../$(FREERTOS_SRC)/portable/GCC/$(FREERTOS_PORT)/*.c))
 
+# Suppress FreeRTOS warnings
+CFLAGS += -Wno-error=cast-qual
+
 # FreeRTOS (lto + Os) linker issue
 LDFLAGS += -Wl,--undefined=vTaskSwitchContext
 
diff --git a/examples/device/hid_composite_freertos/Makefile b/examples/device/hid_composite_freertos/Makefile
index 256db3d8c..c9b7abdf5 100644
--- a/examples/device/hid_composite_freertos/Makefile
+++ b/examples/device/hid_composite_freertos/Makefile
@@ -28,6 +28,9 @@ SRC_C += \
 	$(FREERTOS_SRC)/timers.c \
 	$(subst ../../../,,$(wildcard ../../../$(FREERTOS_SRC)/portable/GCC/$(FREERTOS_PORT)/*.c))
 
+# Suppress FreeRTOS warnings
+CFLAGS += -Wno-error=cast-qual
+
 # FreeRTOS (lto + Os) linker issue
 LDFLAGS += -Wl,--undefined=vTaskSwitchContext
 
diff --git a/examples/device/uac2_headset/src/main.c b/examples/device/uac2_headset/src/main.c
index 790af088f..67e287d3e 100644
--- a/examples/device/uac2_headset/src/main.c
+++ b/examples/device/uac2_headset/src/main.c
@@ -36,11 +36,12 @@
 
 // List of supported sample rates
 #if defined(__RX__)
-const uint32_t sample_rates[]       = {44100, 48000};
+  const uint32_t sample_rates[] = {44100, 48000};
 #else
-const uint32_t sample_rates[]       = {44100, 48000, 88200, 96000};
+  const uint32_t sample_rates[] = {44100, 48000, 88200, 96000};
 #endif
-uint32_t       current_sample_rate  = 44100;
+
+uint32_t current_sample_rate  = 44100;
 
 #define N_SAMPLE_RATES  TU_ARRAY_SIZE(sample_rates)
 
@@ -202,7 +203,7 @@ static bool tud_audio_clock_set_request(uint8_t rhport, audio_control_request_t
   {
     TU_VERIFY(request->wLength == sizeof(audio_control_cur_4_t));
 
-    current_sample_rate = ((audio_control_cur_4_t *)buf)->bCur;
+    current_sample_rate = ((audio_control_cur_4_t const *)buf)->bCur;
 
     TU_LOG1("Clock set current freq: %d\r\n", current_sample_rate);
 
@@ -264,7 +265,7 @@ static bool tud_audio_feature_unit_set_request(uint8_t rhport, audio_control_req
   {
     TU_VERIFY(request->wLength == sizeof(audio_control_cur_1_t));
 
-    mute[request->bChannelNumber] = ((audio_control_cur_1_t *)buf)->bCur;
+    mute[request->bChannelNumber] = ((audio_control_cur_1_t const *)buf)->bCur;
 
     TU_LOG1("Set channel %d Mute: %d\r\n", request->bChannelNumber, mute[request->bChannelNumber]);
 
@@ -295,7 +296,7 @@ static bool tud_audio_feature_unit_set_request(uint8_t rhport, audio_control_req
 // Invoked when audio class specific get request received for an entity
 bool tud_audio_get_req_entity_cb(uint8_t rhport, tusb_control_request_t const *p_request)
 {
-  audio_control_request_t *request = (audio_control_request_t *)p_request;
+  audio_control_request_t const *request = (audio_control_request_t const *)p_request;
 
   if (request->bEntityID == UAC2_ENTITY_CLOCK)
     return tud_audio_clock_get_request(rhport, request);
diff --git a/examples/device/video_capture/src/main.c b/examples/device/video_capture/src/main.c
index a2d95c8f9..f1d48385f 100644
--- a/examples/device/video_capture/src/main.c
+++ b/examples/device/video_capture/src/main.c
@@ -166,7 +166,7 @@ void video_task(void)
     already_sent = 1;
     start_ms = board_millis();
 #ifdef CFG_EXAMPLE_VIDEO_READONLY
-    tud_video_n_frame_xfer(0, 0, (void*)&frame_buffer[(frame_num % (FRAME_WIDTH / 2)) * 4],
+    tud_video_n_frame_xfer(0, 0, (void*)(uintptr_t) &frame_buffer[(frame_num % (FRAME_WIDTH / 2)) * 4],
                            FRAME_WIDTH * FRAME_HEIGHT * 16/8);
 #else
     fill_color_bar(frame_buffer, frame_num);
@@ -180,7 +180,7 @@ void video_task(void)
   start_ms += interval_ms;
 
 #ifdef CFG_EXAMPLE_VIDEO_READONLY
-  tud_video_n_frame_xfer(0, 0, (void*)&frame_buffer[(frame_num % (FRAME_WIDTH / 2)) * 4],
+  tud_video_n_frame_xfer(0, 0, (void*)(uintptr_t) &frame_buffer[(frame_num % (FRAME_WIDTH / 2)) * 4],
                          FRAME_WIDTH * FRAME_HEIGHT * 16/8);
 #else
   fill_color_bar(frame_buffer, frame_num);
diff --git a/examples/device/webusb_serial/src/main.c b/examples/device/webusb_serial/src/main.c
index aba4aedff..2716825f8 100644
--- a/examples/device/webusb_serial/src/main.c
+++ b/examples/device/webusb_serial/src/main.c
@@ -179,7 +179,7 @@ bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_requ
         case VENDOR_REQUEST_WEBUSB:
           // match vendor request in BOS descriptor
           // Get landing page url
-          return tud_control_xfer(rhport, request, (void*) &desc_url, desc_url.bLength);
+          return tud_control_xfer(rhport, request, (void*)(uintptr_t) &desc_url, desc_url.bLength);
 
         case VENDOR_REQUEST_MICROSOFT:
           if ( request->wIndex == 7 )
@@ -188,7 +188,7 @@ bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_requ
             uint16_t total_len;
             memcpy(&total_len, desc_ms_os_20+8, 2);
 
-            return tud_control_xfer(rhport, request, (void*) desc_ms_os_20, total_len);
+            return tud_control_xfer(rhport, request, (void*)(uintptr_t) desc_ms_os_20, total_len);
           }else
           {
             return false;
diff --git a/examples/make.mk b/examples/make.mk
index c894d35f4..774625577 100644
--- a/examples/make.mk
+++ b/examples/make.mk
@@ -104,7 +104,8 @@ CFLAGS += \
   -Wmissing-format-attribute \
   -Wunreachable-code \
   -Wcast-align \
-  -Wcast-function-type
+  -Wcast-function-type \
+  -Wcast-qual
 
 # Debugging/Optimization
 ifeq ($(DEBUG), 1)
diff --git a/hw/bsp/fomu/fomu.c b/hw/bsp/fomu/fomu.c
index 25e5e9613..12b7bfd18 100644
--- a/hw/bsp/fomu/fomu.c
+++ b/hw/bsp/fomu/fomu.c
@@ -101,9 +101,14 @@ int board_uart_read(uint8_t* buf, int len)
 int board_uart_write(void const * buf, int len)
 {
   int32_t offset = 0;
+  uint8_t const* buf8 = (uint8_t const*) buf;
   for (offset = 0; offset < len; offset++)
-    if (! (messible_status_read() & CSR_MESSIBLE_STATUS_FULL_OFFSET))
-      messible_in_write(((uint8_t *)buf)[offset]);
+  {
+    if (!(messible_status_read() & CSR_MESSIBLE_STATUS_FULL_OFFSET))
+    {
+      messible_in_write(buf8[offset]);
+    }
+  }
   return len;
 }
 
diff --git a/hw/bsp/gd32vf103/family.c b/hw/bsp/gd32vf103/family.c
index d76fb9a2a..c20732302 100644
--- a/hw/bsp/gd32vf103/family.c
+++ b/hw/bsp/gd32vf103/family.c
@@ -158,7 +158,7 @@ int board_uart_write(void const* buf, int len) {
 #if defined(UART_DEV)
   int txsize = len;
   while (txsize--) {
-    usart_write(UART_DEV, *(uint8_t*)buf);
+    usart_write(UART_DEV, *(uint8_t const*)buf);
     buf++;
   }
   return len;
diff --git a/hw/bsp/imxrt/family.c b/hw/bsp/imxrt/family.c
index 77a224a5e..716681ca9 100644
--- a/hw/bsp/imxrt/family.c
+++ b/hw/bsp/imxrt/family.c
@@ -172,7 +172,7 @@ int board_uart_read(uint8_t* buf, int len)
 
 int board_uart_write(void const * buf, int len)
 {
-  LPUART_WriteBlocking(UART_PORT, (uint8_t*)buf, len);
+  LPUART_WriteBlocking(UART_PORT, (uint8_t const*)buf, len);
   return len;
 }
 
diff --git a/hw/bsp/lpc15/family.mk b/hw/bsp/lpc15/family.mk
index e80a3bc51..c7dd3f8be 100644
--- a/hw/bsp/lpc15/family.mk
+++ b/hw/bsp/lpc15/family.mk
@@ -15,7 +15,7 @@ CFLAGS += \
   -DCFG_TUSB_MEM_ALIGN='__attribute__((aligned(64)))' 
 
 # mcu driver cause following warnings
-CFLAGS += -Wno-error=strict-prototypes -Wno-error=unused-parameter -Wno-error=unused-variable
+CFLAGS += -Wno-error=strict-prototypes -Wno-error=unused-parameter -Wno-error=unused-variable -Wno-error=cast-qual
 
 MCU_DIR = hw/mcu/nxp/lpcopen/lpc15xx/lpc_chip_15xx
 
diff --git a/hw/bsp/lpc18/family.mk b/hw/bsp/lpc18/family.mk
index 3fed0b45a..79a00cb2d 100644
--- a/hw/bsp/lpc18/family.mk
+++ b/hw/bsp/lpc18/family.mk
@@ -13,7 +13,7 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_LPC18XX
 
 # mcu driver cause following warnings
-CFLAGS += -Wno-error=unused-parameter -Wno-error=strict-prototypes
+CFLAGS += -Wno-error=unused-parameter -Wno-error=strict-prototypes -Wno-error=cast-qual
 
 MCU_DIR = hw/mcu/nxp/lpcopen/lpc18xx/lpc_chip_18xx
 
diff --git a/hw/bsp/lpc54/family.c b/hw/bsp/lpc54/family.c
index 4789425a3..4f1199c3a 100644
--- a/hw/bsp/lpc54/family.c
+++ b/hw/bsp/lpc54/family.c
@@ -210,7 +210,7 @@ int board_uart_read(uint8_t* buf, int len)
 
 int board_uart_write(void const * buf, int len)
 {
-  USART_WriteBlocking(UART_DEV, (uint8_t *)buf, len);
+  USART_WriteBlocking(UART_DEV, (uint8_t const *) buf, len);
   return 0;
 }
 
diff --git a/hw/bsp/lpc55/family.c b/hw/bsp/lpc55/family.c
index 4fc1f6222..f037a9f5b 100644
--- a/hw/bsp/lpc55/family.c
+++ b/hw/bsp/lpc55/family.c
@@ -265,7 +265,7 @@ int board_uart_read(uint8_t* buf, int len)
 
 int board_uart_write(void const * buf, int len)
 {
-  USART_WriteBlocking(UART_DEV, (uint8_t *)buf, len);
+  USART_WriteBlocking(UART_DEV, (uint8_t const *) buf, len);
   return len;
 }
 
diff --git a/hw/bsp/mm32/family.mk b/hw/bsp/mm32/family.mk
index 3273ff870..1a9f51191 100644
--- a/hw/bsp/mm32/family.mk
+++ b/hw/bsp/mm32/family.mk
@@ -14,7 +14,7 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_MM32F327X 
 
 # suppress warning caused by vendor mcu driver
-CFLAGS += -Wno-error=unused-parameter -Wno-error=maybe-uninitialized
+CFLAGS += -Wno-error=unused-parameter -Wno-error=maybe-uninitialized -Wno-error=cast-qual
 
 SRC_C += \
 	src/portable/mindmotion/mm32/dcd_mm32f327x_otg.c \
diff --git a/hw/bsp/rx/boards/gr_citrus/gr_citrus.c b/hw/bsp/rx/boards/gr_citrus/gr_citrus.c
index caf5fd6fa..633ddad16 100644
--- a/hw/bsp/rx/boards/gr_citrus/gr_citrus.c
+++ b/hw/bsp/rx/boards/gr_citrus/gr_citrus.c
@@ -228,7 +228,7 @@ int board_uart_read(uint8_t* buf, int len)
 
 int board_uart_write(void const *buf, int len)
 {
-  sci0_buf[0].buf = (uint8_t*)buf;
+  sci0_buf[0].buf = (uint8_t*)(uintptr_t) buf;
   sci0_buf[0].cnt = len;
   SCI0.SCR.BYTE |= SCI_SCR_TE | SCI_SCR_TIE;
   while (SCI0.SCR.BIT.TE) ;
diff --git a/hw/bsp/rx/boards/rx65n_target/rx65n_target.c b/hw/bsp/rx/boards/rx65n_target/rx65n_target.c
index 20867455e..ab86bc419 100644
--- a/hw/bsp/rx/boards/rx65n_target/rx65n_target.c
+++ b/hw/bsp/rx/boards/rx65n_target/rx65n_target.c
@@ -273,7 +273,7 @@ int board_uart_read(uint8_t* buf, int len)
 
 int board_uart_write(void const *buf, int len)
 {
-  sci_buf[0].buf = (uint8_t*)buf;
+  sci_buf[0].buf = (uint8_t*)(uintptr_t) buf;
   sci_buf[0].cnt = len;
   SCI5.SCR.BYTE |= SCI_SCR_TE | SCI_SCR_TIE;
   while (SCI5.SCR.BIT.TE) ;
diff --git a/hw/bsp/samd11/family.mk b/hw/bsp/samd11/family.mk
index 032d11b98..ae55be75b 100644
--- a/hw/bsp/samd11/family.mk
+++ b/hw/bsp/samd11/family.mk
@@ -11,6 +11,9 @@ CFLAGS += \
   -DOSC32K_OVERWRITE_CALIBRATION=0 \
   -DCFG_TUSB_MCU=OPT_MCU_SAMD11
 
+# suppress warning caused by vendor mcu driver
+CFLAGS += -Wno-error=cast-qual
+
 SRC_C += \
 	src/portable/microchip/samd/dcd_samd.c \
 	hw/mcu/microchip/samd11/gcc/gcc/startup_samd11.c \
diff --git a/hw/bsp/samd21/family.mk b/hw/bsp/samd21/family.mk
index f1b063f2c..208f23789 100644
--- a/hw/bsp/samd21/family.mk
+++ b/hw/bsp/samd21/family.mk
@@ -12,6 +12,9 @@ CFLAGS += \
   -DCONF_DFLL_OVERWRITE_CALIBRATION=0 \
   -DCFG_TUSB_MCU=OPT_MCU_SAMD21
 
+# suppress warning caused by vendor mcu driver
+CFLAGS += -Wno-error=cast-qual
+
 SRC_C += \
 	src/portable/microchip/samd/dcd_samd.c \
 	hw/mcu/microchip/samd21/gcc/gcc/startup_samd21.c \
diff --git a/hw/bsp/samd51/family.mk b/hw/bsp/samd51/family.mk
index f4e260fb1..783bed82a 100644
--- a/hw/bsp/samd51/family.mk
+++ b/hw/bsp/samd51/family.mk
@@ -13,7 +13,8 @@ CFLAGS += \
   -nostdlib -nostartfiles \
   -DCFG_TUSB_MCU=OPT_MCU_SAMD51
 
-CFLAGS += -Wno-error=undef
+# suppress warning caused by vendor mcu driver
+CFLAGS += -Wno-error=cast-qual
 
 SRC_C += \
 	src/portable/microchip/samd/dcd_samd.c \
diff --git a/hw/bsp/saml2x/family.mk b/hw/bsp/saml2x/family.mk
index e0f6b2f77..bb1faeb7f 100644
--- a/hw/bsp/saml2x/family.mk
+++ b/hw/bsp/saml2x/family.mk
@@ -13,6 +13,9 @@ CFLAGS += \
   -DCONF_OSC32K_CALIB_ENABLE=0 \
   -DCFG_TUSB_MCU=OPT_MCU_SAML22
 
+# suppress warning caused by vendor mcu driver
+CFLAGS += -Wno-error=cast-qual
+
 SRC_C += \
 	src/portable/microchip/samd/dcd_samd.c \
 	$(MCU_DIR)/gcc/gcc/startup_$(SAML_VARIANT).c \
diff --git a/hw/bsp/stm32f0/family.c b/hw/bsp/stm32f0/family.c
index 68b924432..8de3147e2 100644
--- a/hw/bsp/stm32f0/family.c
+++ b/hw/bsp/stm32f0/family.c
@@ -134,7 +134,7 @@ int board_uart_read(uint8_t* buf, int len)
 
 int board_uart_write(void const * buf, int len)
 {
-  HAL_UART_Transmit(&UartHandle, (uint8_t*) buf, len, 0xffff);
+  HAL_UART_Transmit(&UartHandle, (uint8_t*)(uintptr_t) buf, len, 0xffff);
   return len;
 }
 
diff --git a/hw/bsp/stm32f0/family.mk b/hw/bsp/stm32f0/family.mk
index 08cbf5626..39831e154 100644
--- a/hw/bsp/stm32f0/family.mk
+++ b/hw/bsp/stm32f0/family.mk
@@ -18,7 +18,7 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_STM32F0
 
 # suppress warning caused by vendor mcu driver
-CFLAGS += -Wno-error=unused-parameter -Wno-error=cast-align
+CFLAGS += -Wno-error=unused-parameter -Wno-error=cast-align -Wno-error=cast-qual
 
 SRC_C += \
   src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c \
diff --git a/hw/bsp/stm32f4/family.c b/hw/bsp/stm32f4/family.c
index cf0cb2b08..31f27fa3f 100644
--- a/hw/bsp/stm32f4/family.c
+++ b/hw/bsp/stm32f4/family.c
@@ -160,7 +160,7 @@ int board_uart_read(uint8_t* buf, int len)
 int board_uart_write(void const * buf, int len)
 {
 #ifdef UART_DEV
-  HAL_UART_Transmit(&UartHandle, (uint8_t*) buf, len, 0xffff);
+  HAL_UART_Transmit(&UartHandle, (uint8_t*)(uintptr_t) buf, len, 0xffff);
   return len;
 #else
   (void) buf; (void) len; (void) UartHandle;
diff --git a/hw/bsp/stm32f7/family.c b/hw/bsp/stm32f7/family.c
index 2eb737ee3..14e3b2fd9 100644
--- a/hw/bsp/stm32f7/family.c
+++ b/hw/bsp/stm32f7/family.c
@@ -284,7 +284,7 @@ int board_uart_read(uint8_t* buf, int len)
 
 int board_uart_write(void const * buf, int len)
 {
-  HAL_UART_Transmit(&UartHandle, (uint8_t*) buf, len, 0xffff);
+  HAL_UART_Transmit(&UartHandle, (uint8_t*)(uintptr_t) buf, len, 0xffff);
   return len;
 }
 
diff --git a/hw/bsp/stm32h7/family.c b/hw/bsp/stm32h7/family.c
index a2116d0bd..84976b4e4 100644
--- a/hw/bsp/stm32h7/family.c
+++ b/hw/bsp/stm32h7/family.c
@@ -237,7 +237,7 @@ int board_uart_read(uint8_t* buf, int len)
 
 int board_uart_write(void const * buf, int len)
 {
-  HAL_UART_Transmit(&UartHandle, (uint8_t*) buf, len, 0xffff);
+  HAL_UART_Transmit(&UartHandle, (uint8_t*)(uintptr_t) buf, len, 0xffff);
   return len;
 }
 
diff --git a/src/class/cdc/cdc_host.c b/src/class/cdc/cdc_host.c
index e7eaf4d05..f4fb6c1d6 100644
--- a/src/class/cdc/cdc_host.c
+++ b/src/class/cdc/cdc_host.c
@@ -105,7 +105,7 @@ bool tuh_cdc_send(uint8_t dev_addr, void const * p_data, uint32_t length, bool i
   uint8_t const ep_out = cdch_data[dev_addr-1].ep_out;
   if ( usbh_edpt_busy(dev_addr, ep_out) ) return false;
 
-  return usbh_edpt_xfer(dev_addr, ep_out, (void *) p_data, length);
+  return usbh_edpt_xfer(dev_addr, ep_out, (void*)(uintptr_t) p_data, length);
 }
 
 bool tuh_cdc_receive(uint8_t dev_addr, void * p_buffer, uint32_t length, bool is_notify)
diff --git a/src/class/msc/msc_host.c b/src/class/msc/msc_host.c
index 8069353cd..fa6519956 100644
--- a/src/class/msc/msc_host.c
+++ b/src/class/msc/msc_host.c
@@ -263,7 +263,7 @@ bool tuh_msc_write10(uint8_t dev_addr, uint8_t lun, void const * buffer, uint32_
 
   memcpy(cbw.command, &cmd_write10, cbw.cmd_len);
 
-  return tuh_msc_scsi_command(dev_addr, &cbw, (void*) buffer, complete_cb);
+  return tuh_msc_scsi_command(dev_addr, &cbw, (void*)(uintptr_t) buffer, complete_cb);
 }
 
 #if 0
diff --git a/src/device/usbd.c b/src/device/usbd.c
index b4680283f..6a5210b34 100644
--- a/src/device/usbd.c
+++ b/src/device/usbd.c
@@ -1002,7 +1002,7 @@ static bool process_get_descriptor(uint8_t rhport, tusb_control_request_t const
         tusb_control_request_t mod_request = *p_request;
         mod_request.wLength = CFG_TUD_ENDPOINT0_SIZE;
 
-        tud_control_xfer(rhport, &mod_request, desc_device, CFG_TUD_ENDPOINT0_SIZE);
+        return tud_control_xfer(rhport, &mod_request, desc_device, CFG_TUD_ENDPOINT0_SIZE);
       }else
       {
         return tud_control_xfer(rhport, p_request, desc_device, sizeof(tusb_desc_device_t));
diff --git a/src/host/usbh.c b/src/host/usbh.c
index 2ef936ad0..53e8b9715 100644
--- a/src/host/usbh.c
+++ b/src/host/usbh.c
@@ -894,11 +894,10 @@ static bool enum_get_9byte_config_desc_complete(uint8_t dev_addr, tusb_control_r
   TU_ASSERT(XFER_RESULT_SUCCESS == result);
 
   // TODO not enough buffer to hold configuration descriptor
-  tusb_desc_configuration_t const * desc_config = (tusb_desc_configuration_t const*) _usbh_ctrl_buf;
-  uint16_t total_len;
+  uint8_t const * desc_config = _usbh_ctrl_buf;
 
   // Use offsetof to avoid pointer to the odd/misaligned address
-  memcpy(&total_len, (uint8_t*) desc_config + offsetof(tusb_desc_configuration_t, wTotalLength), 2);
+  uint16_t const total_len = tu_le16toh( tu_unaligned_read16(desc_config + offsetof(tusb_desc_configuration_t, wTotalLength)) );
 
   TU_ASSERT(total_len <= CFG_TUH_ENUMERATION_BUFSIZE);
 
diff --git a/src/portable/ehci/ehci.c b/src/portable/ehci/ehci.c
index e3b7499cc..18ddaf31a 100644
--- a/src/portable/ehci/ehci.c
+++ b/src/portable/ehci/ehci.c
@@ -128,7 +128,7 @@ static inline ehci_qtd_t* qtd_find_free (void);
 static inline ehci_qtd_t* qtd_next (ehci_qtd_t const * p_qtd);
 static inline void qtd_insert_to_qhd (ehci_qhd_t *p_qhd, ehci_qtd_t *p_qtd_new);
 static inline void qtd_remove_1st_from_qhd (ehci_qhd_t *p_qhd);
-static void qtd_init (ehci_qtd_t* p_qtd, void* buffer, uint16_t total_bytes);
+static void qtd_init (ehci_qtd_t* p_qtd, void const* buffer, uint16_t total_bytes);
 
 static inline void list_insert (ehci_link_t *current, ehci_link_t *new, uint8_t new_type);
 static inline ehci_link_t* list_next (ehci_link_t *p_link_pointer);
@@ -392,7 +392,7 @@ bool hcd_setup_send(uint8_t rhport, uint8_t dev_addr, uint8_t const setup_packet
   ehci_qhd_t* qhd = &ehci_data.control[dev_addr].qhd;
   ehci_qtd_t* td  = &ehci_data.control[dev_addr].qtd;
 
-  qtd_init(td, (void*) setup_packet, 8);
+  qtd_init(td, setup_packet, 8);
   td->pid          = EHCI_PID_SETUP;
   td->int_on_complete = 1;
   td->next.terminate  = 1;
@@ -857,7 +857,7 @@ static void qhd_init(ehci_qhd_t *p_qhd, uint8_t dev_addr, tusb_desc_endpoint_t c
   }
 }
 
-static void qtd_init(ehci_qtd_t* p_qtd, void* buffer, uint16_t total_bytes)
+static void qtd_init(ehci_qtd_t* p_qtd, void const* buffer, uint16_t total_bytes)
 {
   tu_memclr(p_qtd, sizeof(ehci_qtd_t));
 
diff --git a/src/portable/nxp/transdimension/dcd_transdimension.c b/src/portable/nxp/transdimension/dcd_transdimension.c
index a7c4545c2..0f58cceb9 100644
--- a/src/portable/nxp/transdimension/dcd_transdimension.c
+++ b/src/portable/nxp/transdimension/dcd_transdimension.c
@@ -636,7 +636,7 @@ void dcd_int_handler(uint8_t rhport)
       // 23.10.10.2 Operational model for setup transfers
       dcd_reg->ENDPTSETUPSTAT = dcd_reg->ENDPTSETUPSTAT;
 
-      dcd_event_setup_received(rhport, (uint8_t*) &_dcd_data.qhd[0][0].setup_request, true);
+      dcd_event_setup_received(rhport, (uint8_t*)(uintptr_t) &_dcd_data.qhd[0][0].setup_request, true);
     }
 
     // 23.10.12.3 Failed QTD also get ENDPTCOMPLETE set
diff --git a/src/portable/renesas/usba/dcd_usba.c b/src/portable/renesas/usba/dcd_usba.c
index 92e29f9bf..07d3ba898 100644
--- a/src/portable/renesas/usba/dcd_usba.c
+++ b/src/portable/renesas/usba/dcd_usba.c
@@ -259,7 +259,7 @@ static inline void pipe_wait_for_ready(unsigned num)
 
 static void pipe_write_packet(void *buf, volatile void *fifo, unsigned len)
 {
-  hw_fifo_t *reg = (hw_fifo_t*)fifo;
+  volatile hw_fifo_t *reg = (volatile hw_fifo_t*) fifo;
   uintptr_t addr = (uintptr_t)buf;
   while (len >= 2) {
     reg->u16 = *(const uint16_t *)addr;
@@ -275,7 +275,7 @@ static void pipe_write_packet(void *buf, volatile void *fifo, unsigned len)
 static void pipe_read_packet(void *buf, volatile void *fifo, unsigned len)
 {
   uint8_t *p   = (uint8_t*)buf;
-  uint8_t *reg = (uint8_t*)fifo;  /* byte access is always at base register address */
+  volatile uint8_t *reg = (volatile uint8_t*)fifo;  /* byte access is always at base register address */
   while (len--) *p++ = *reg;
 }
 
diff --git a/src/portable/st/synopsys/dcd_synopsys.c b/src/portable/st/synopsys/dcd_synopsys.c
index 85abf940e..29030784b 100644
--- a/src/portable/st/synopsys/dcd_synopsys.c
+++ b/src/portable/st/synopsys/dcd_synopsys.c
@@ -976,7 +976,7 @@ static void handle_rxflvl_ints(uint8_t rhport, USB_OTG_OUTEndpointTypeDef * out_
       if (xfer->ff)
       {
         // Ring buffer
-        tu_fifo_write_n_const_addr_full_words(xfer->ff, (const void *) rx_fifo, bcnt);
+        tu_fifo_write_n_const_addr_full_words(xfer->ff, (const void *)(uintptr_t) rx_fifo, bcnt);
       }
       else
       {
@@ -1096,7 +1096,7 @@ static void handle_epin_ints(uint8_t rhport, USB_OTG_DeviceTypeDef * dev, USB_OT
           if (xfer->ff)
           {
             usb_fifo_t tx_fifo = FIFO_BASE(rhport, n);
-            tu_fifo_read_n_const_addr_full_words(xfer->ff, (void *) tx_fifo, packet_size);
+            tu_fifo_read_n_const_addr_full_words(xfer->ff, (void *)(uintptr_t) tx_fifo, packet_size);
           }
           else
           {
diff --git a/src/portable/valentyusb/eptri/dcd_eptri.c b/src/portable/valentyusb/eptri/dcd_eptri.c
index 89bc7a1ab..837d0c0ce 100644
--- a/src/portable/valentyusb/eptri/dcd_eptri.c
+++ b/src/portable/valentyusb/eptri/dcd_eptri.c
@@ -314,13 +314,13 @@ static void dcd_reset(void)
   usb_in_ctrl_write(1 << CSR_USB_IN_CTRL_RESET_OFFSET);
   usb_out_ctrl_write(1 << CSR_USB_OUT_CTRL_RESET_OFFSET);
 
-  memset((void *)rx_buffer, 0, sizeof(rx_buffer));
-  memset((void *)rx_buffer_max, 0, sizeof(rx_buffer_max));
-  memset((void *)rx_buffer_offset, 0, sizeof(rx_buffer_offset));
+  memset((void *)(uintptr_t) rx_buffer, 0, sizeof(rx_buffer));
+  memset((void *)(uintptr_t) rx_buffer_max, 0, sizeof(rx_buffer_max));
+  memset((void *)(uintptr_t) rx_buffer_offset, 0, sizeof(rx_buffer_offset));
 
-  memset((void *)tx_buffer, 0, sizeof(tx_buffer));
-  memset((void *)tx_buffer_max, 0, sizeof(tx_buffer_max));
-  memset((void *)tx_buffer_offset, 0, sizeof(tx_buffer_offset));
+  memset((void *)(uintptr_t) tx_buffer, 0, sizeof(tx_buffer));
+  memset((void *)(uintptr_t) tx_buffer_max, 0, sizeof(tx_buffer_max));
+  memset((void *)(uintptr_t) tx_buffer_offset, 0, sizeof(tx_buffer_offset));
   tx_ep = 0;
   tx_active = false;