fw/drivers/dma: add dma driver for sf32lb

boards/obelix_dvt/defconfig

@@ -80,6 +80,9 @@ CONFIG_RNG_SF32LB=y
 CONFIG_CPUMODE=y
 CONFIG_CPUMODE_SF32LB=y
 
+CONFIG_DMA=y
+CONFIG_DMA_SF32LB=y
+
 CONFIG_DYNAMIC_BACKLIGHT=y
 CONFIG_ACCEL_SENSITIVITY=y
 CONFIG_APP_SCALING=y

boards/obelix_pvt/defconfig

@@ -80,6 +80,9 @@ CONFIG_RNG_SF32LB=y
 CONFIG_CPUMODE=y
 CONFIG_CPUMODE_SF32LB=y
 
+CONFIG_DMA=y
+CONFIG_DMA_SF32LB=y
+
 CONFIG_DYNAMIC_BACKLIGHT=y
 CONFIG_ACCEL_SENSITIVITY=y
 CONFIG_APP_SCALING=y

src/fw/drivers/Kconfig

@@ -7,6 +7,7 @@ rsource "ambient/Kconfig"
 rsource "backlight/Kconfig"
 rsource "battery/Kconfig"
 rsource "cpumode/Kconfig"
+rsource "dma/Kconfig"
 rsource "display/Kconfig"
 rsource "exti/Kconfig"
 rsource "flash/Kconfig"

src/fw/drivers/dma/Kconfig

@@ -0,0 +1,21 @@
+# SPDX-FileCopyrightText: 2026 Core Devices LLC
+# SPDX-License-Identifier: Apache-2.0
+
+menuconfig DMA
+    bool "DMA"
+    help
+      DMA Drivers
+
+if DMA
+
+config DMA_NRF5
+    bool "Nordic nRF5 DMA Controller"
+    help
+      Support for the Nordic nRF5 DMA controller.
+
+config DMA_SF32LB
+    bool "SiFli SF32LB DMA Controller"
+    help
+      Support for the SiFli SF32LB DMA controller.
+
+endif # DMA

src/fw/drivers/dma/sf32lb.c

@@ -0,0 +1,75 @@
+/* SPDX-FileCopyrightText: 2026 Core Devices LLC */
+/* SPDX-License-Identifier: Apache-2.0 */
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "board/board.h"
+
+#include <bf0_hal.h>
+
+#include "sf32lb.h"
+
+#define DMA_CHANNEL_NUM 8U
+
+struct DMARequest {
+  DMA_HandleTypeDef *handle;
+};
+
+static DMADirectRequestHandler handlers[DMA_CHANNEL_NUM];
+static DMACircularRequestHandler circular_handlers[DMA_CHANNEL_NUM];
+
+static void dma_cplt_callback(DMA_HandleTypeDef *hdma)
+{
+  DMARequest *this = (DMARequest *)hdma->Parent; //container_of?
+
+  if (handlers[hdma->ChannelIndex] != NULL)
+    handlers[hdma->ChannelIndex](this, NULL);
+}
+
+void dma_request_init(DMARequest *this)
+{
+  HAL_DMA_Init(this->handle);
+}
+
+void dma_request_start_direct(DMARequest *this, void *dst, const void *src, uint32_t length,
+                              DMADirectRequestHandler handler, void *context)
+{
+  HAL_DMA_RegisterCallback(this->handle, HAL_DMA_XFER_CPLT_CB_ID, dma_cplt_callback);
+  handlers[this->handle->ChannelIndex] = handler;
+  HAL_DMA_Start_IT(this->handle, (uint32_t)src, (uint32_t)dst, length);
+}
+
+void dma_request_start_circular(DMARequest *this, void *dst, const void *src, uint32_t length,
+                                DMACircularRequestHandler handler, void *context)
+{
+  HAL_DMA_RegisterCallback(this->handle, HAL_DMA_XFER_CPLT_CB_ID, dma_cplt_callback);
+  circular_handlers[this->handle->ChannelIndex] = handler;
+  HAL_DMA_Start_IT(this->handle, (uint32_t)src, (uint32_t)dst, length);
+}
+
+void dma_request_stop(DMARequest *this)
+{
+  HAL_DMA_Abort(this->handle);
+}
+
+bool dma_request_in_progress(DMARequest *this)
+{
+  return (HAL_DMA_GetState(this->handle) == HAL_DMA_STATE_BUSY);
+}
+
+uint32_t dma_request_get_current_data_counter(DMARequest *this)
+{
+  return 0;
+//  return HAL_DMA_GetCurrentDataCounter(this->handle);
+}
+
+bool dma_request_get_and_clear_transfer_error(DMARequest *this)
+{
+  return false;
+}
+
+void dma_request_set_memory_increment_disabled(DMARequest *this, bool disabled)
+{
+
+}

src/fw/drivers/dma/sf32lb.h

@@ -0,0 +1,6 @@
+/* SPDX-FileCopyrightText: 2026 Core Devices LLC */
+/* SPDX-License-Identifier: Apache-2.0 */
+
+
+
+

src/fw/drivers/dma/wscript_build

@@ -0,0 +1,19 @@
+# SPDX-FileCopyrightText: 2026 Core Devices LLC
+# SPDX-License-Identifier: Apache-2.0
+
+use = ['freertos', 'fw_includes']
+
+if bld.env.CONFIG_DMA_NRF5:
+    use.append('hal_nordic')
+    sources.append('nrf5.c')
+elif bld.env.CONFIG_DMA_SF32LB:
+    use.append('hal_sifli')
+    sources.append('sf32lb.c')
+
+bld.objects(
+    name='driver_dma',
+    source=sources,
+    use=use,
+)
+
+bld.env.DRIVERS.append('driver_dma')

src/fw/drivers/stubs/dma.c

@@ -0,0 +1,56 @@
+/* SPDX-FileCopyrightText: 2026 Core Devices LLC */
+/* SPDX-License-Identifier: Apache-2.0 */
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "drivers/dma.h"
+
+T_STATIC DMADirectRequestHandler handlers[DMA_CHANNEL_NUM];
+
+static void dma_cplt_callback(DMA_HandleTypeDef *hdma)
+{
+
+}
+
+void dma_request_init(DMARequest *this)
+{
+
+}
+
+void dma_request_start_direct(DMARequest *this, void *dst, const void *src, uint32_t length,
+                              DMADirectRequestHandler handler, void *context)
+{
+
+}
+
+void dma_request_start_circular(DMARequest *this, void *dst, const void *src, uint32_t length,
+                                DMACircularRequestHandler handler, void *context)
+{
+
+}
+
+void dma_request_stop(DMARequest *this)
+{
+
+}
+
+bool dma_request_in_progress(DMARequest *this)
+{
+  return true;
+}
+
+uint32_t dma_request_get_current_data_counter(DMARequest *this)
+{
+  return 0;
+}
+
+bool dma_request_get_and_clear_transfer_error(DMARequest *this);
+{
+  return true;
+}
+
+void dma_request_set_memory_increment_disabled(DMARequest *this, bool disabled)
+{
+
+}

src/fw/drivers/wscript_build

@@ -381,4 +381,7 @@ bld(
     use=bld.env.DRIVERS,
 )
 
+if bld.env.CONFIG_DMA:
+    bld.recurse('dma')
+
 # vim:filetype=python