From 9ab605ef0b7402e72f9540d4b54af607d60cfd7a Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Thu, 1 Jan 2026 12:51:05 +0700
Subject: [PATCH] change signature of tu_hwfifo_* to have hwfifo as first
 parameter

---
 src/common/tusb_fifo.c                        |  8 ++++++++
 src/common/tusb_fifo.h                        | 10 ++++++----
 src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c |  4 ++--
 src/portable/synopsys/dwc2/dcd_dwc2.c         |  4 ++--
 4 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/src/common/tusb_fifo.c b/src/common/tusb_fifo.c
index 38b00d9d6..828240b6c 100644
--- a/src/common/tusb_fifo.c
+++ b/src/common/tusb_fifo.c
@@ -167,9 +167,17 @@ void tu_hwfifo_write(volatile void *hwfifo, const uint8_t *src, uint16_t len) {
 
   // Write the remaining 1 byte (16bit) or 1-3 bytes (32bit)
   if (len > 0) {
+  #ifdef CFG_TUSB_FIFO_HWFIFO_DATA_STRIDE_ODD_BYTE
+    // odd byte access, write byte per byte e.g for rusb2. No address stride needed
+    volatile uint8_t *dest8 = (volatile uint8_t *)dest;
+    for (uint16_t i = 0; i < len; ++i) {
+      *dest8 = src[i];
+    }
+  #else
     hwfifo_item_t tmp = 0u;
     memcpy(&tmp, src, len);
     *dest = tmp;
+  #endif
   }
 }
 #endif
diff --git a/src/common/tusb_fifo.h b/src/common/tusb_fifo.h
index 2473a5605..e1ea1126c 100644
--- a/src/common/tusb_fifo.h
+++ b/src/common/tusb_fifo.h
@@ -226,12 +226,14 @@ TU_ATTR_ALWAYS_INLINE static inline uint16_t tu_fifo_write_n(tu_fifo_t *f, const
 // CFG_TUSB_FIFO_HWFIFO_DATA_STRIDE (data width) and CFG_TUSB_FIFO_HWFIFO_ADDR_STRIDE (address increment)
 // Note: these usually has opposiite direction (read/write) to/from our software FIFO  (tu_fifo_t)
 //--------------------------------------------------------------------+
-TU_ATTR_ALWAYS_INLINE static inline uint16_t tu_hwfifo_write_from_fifo(tu_fifo_t *f, void *hwfifo, uint16_t n) {
-  return tu_fifo_read_n_access_mode(f, hwfifo, n, true);
+TU_ATTR_ALWAYS_INLINE static inline uint16_t tu_hwfifo_write_from_fifo(volatile void *hwfifo, tu_fifo_t *f,
+                                                                       uint16_t n) {
+  return tu_fifo_read_n_access_mode(f, (void *)(uintptr_t)hwfifo, n, true);
 }
 
-TU_ATTR_ALWAYS_INLINE static inline uint16_t tu_hwfifo_read_to_fifo(tu_fifo_t *f, const void *hwfifo, uint16_t n) {
-  return tu_fifo_write_n_access_mode(f, hwfifo, n, true);
+TU_ATTR_ALWAYS_INLINE static inline uint16_t tu_hwfifo_read_to_fifo(const volatile void *hwfifo, tu_fifo_t *f,
+                                                                    uint16_t n) {
+  return tu_fifo_write_n_access_mode(f, (const void *)(uintptr_t)hwfifo, n, true);
 }
 
 #if CFG_TUSB_FIFO_HWFIFO_API
diff --git a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
index dae921049..fe4f649da 100644
--- a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
+++ b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
@@ -324,7 +324,7 @@ static void handle_ctr_rx(uint32_t ep_id) {
   fsdev_pma_buf_t *pma_buf  = PMA_BUF_AT(pma_addr);
 
   if (xfer->ff) {
-    tu_hwfifo_read_to_fifo(xfer->ff, (void *)pma_buf, rx_count);
+    tu_hwfifo_read_to_fifo(pma_buf, xfer->ff, rx_count);
   } else {
     tu_hwfifo_read(pma_buf, xfer->buffer + xfer->queued_len, rx_count);
   }
@@ -722,7 +722,7 @@ static void dcd_transmit_packet(xfer_ctl_t *xfer, uint16_t ep_ix) {
   fsdev_pma_buf_t *pma_buf  = PMA_BUF_AT(addr_ptr);
 
   if (xfer->ff) {
-    tu_hwfifo_write_from_fifo(xfer->ff, (void *)(uintptr_t)pma_buf, len);
+    tu_hwfifo_write_from_fifo(pma_buf, xfer->ff, len);
   } else {
     tu_hwfifo_write(pma_buf, &(xfer->buffer[xfer->queued_len]), len);
   }
diff --git a/src/portable/synopsys/dwc2/dcd_dwc2.c b/src/portable/synopsys/dwc2/dcd_dwc2.c
index ea952dbcc..b44b8b56e 100644
--- a/src/portable/synopsys/dwc2/dcd_dwc2.c
+++ b/src/portable/synopsys/dwc2/dcd_dwc2.c
@@ -367,7 +367,7 @@ static uint16_t epin_write_tx_fifo(dwc2_regs_t *dwc2, uint8_t epnum) {
     // Push packet to Tx-FIFO
     if (xfer->ff) {
       volatile uint32_t* tx_fifo = dwc2->fifo[epnum];
-      tu_hwfifo_write_from_fifo(xfer->ff, (void *)(uintptr_t)tx_fifo, xact_bytes);
+      tu_hwfifo_write_from_fifo(tx_fifo, xfer->ff, xact_bytes);
       total_bytes_written += xact_bytes;
     } else {
       dfifo_write_packet(dwc2, epnum, xfer->buffer, xact_bytes);
@@ -889,7 +889,7 @@ static void handle_rxflvl_irq(uint8_t rhport) {
       if (byte_count != 0) {
         // Read packet off RxFIFO
         if (xfer->ff != NULL) {
-          tu_hwfifo_read_to_fifo(xfer->ff, (const void *)(uintptr_t)rx_fifo, byte_count);
+          tu_hwfifo_read_to_fifo(rx_fifo, xfer->ff, byte_count);
         } else {
           dfifo_read_packet(dwc2, xfer->buffer, byte_count);
           xfer->buffer += byte_count;