fw/drviers/i2c: add dma support for i2c4 on sifli

Signed-off-by: Qingsong Gou <gouqs@hotmail.com>

Author: ck-telecom

src/fw/board/boards/board_obelix.c

@@ -282,7 +282,7 @@ static const I2CSlavePort s_i2c_aw86225 = {
     .bus = &s_i2c_bus_1,
     .address = 0x58,
 };
-  
+
 I2CSlavePort *const I2C_AW86225 = &s_i2c_aw86225;
 
 static const AW86225Config s_aw86225_config = {
@@ -488,6 +488,24 @@ static I2CBusHalState s_i2c_bus_hal_state_4 = {
         .Mode = HAL_I2C_MODE_MASTER,
         .core = CORE_ID_HCPU,
     },
+    .dma_tx = {
+        .Instance = DMA1_Channel6,
+        .dma_irq = DMAC1_CH6_IRQn,
+        .request = DMA_REQUEST_3,
+        .dma_irq_prio = 5,
+    },
+    .dma_rx = {
+        .Instance = DMA1_Channel7,
+        .dma_irq = DMAC1_CH7_IRQn,
+        .request = DMA_REQUEST_3,
+        .dma_irq_prio = 5,
+    },
+    .hdma_tx = {
+        .Instance = DMA1_Channel6,
+    },
+    .hdma_rx = {
+        .Instance = DMA1_Channel7,
+    },
 };
 
 static I2CBusHal s_i2c_bus_hal_4 = {
@@ -507,6 +525,9 @@ static I2CBusHal s_i2c_bus_hal_4 = {
     .module = RCC_MOD_I2C4,
     .irqn = I2C4_IRQn,
     .irq_priority = 5,
+    .dma_tx_irqn = DMAC1_CH6_IRQn,
+    .dma_rx_irqn = DMAC1_CH7_IRQn,
+    .dma_irq_priority = 5,
 };
 
 static I2CBusState s_i2c_bus_state_4;
@@ -521,6 +542,8 @@ static I2CBus s_i2c_bus_4 = {
 I2CBus *const I2C4_BUS = &s_i2c_bus_4;
 
 IRQ_MAP(I2C4, i2c_irq_handler, I2C4_BUS);
+IRQ_MAP(DMAC1_CH6, i2c_dma_tx_irq_handler, I2C4_BUS);
+IRQ_MAP(DMAC1_CH7, i2c_dma_rx_irq_handler, I2C4_BUS);
 
 static const I2CSlavePort s_i2c_gh3x2x = {
     .bus = &s_i2c_bus_4,
@@ -563,7 +586,7 @@ static const I2CSlavePort s_i2c_w1160 = {
     .bus = &s_i2c_bus_1,
     .address = 0x48,
   };
-  
+
 I2CSlavePort *const I2C_W1160 = &s_i2c_w1160;
 
 const BoardConfigPower BOARD_CONFIG_POWER = {
@@ -610,7 +633,7 @@ static const MicDevice mic_device = {
     .clk_gpio = {
         .pad = PAD_PA22,
         .func = PDM1_CLK,
-        .flags = PIN_NOPULL, 
+        .flags = PIN_NOPULL,
     },
     .data_gpio = {
         .pad = PAD_PA23,
@@ -619,7 +642,7 @@ static const MicDevice mic_device = {
     },
     .pdm_dma_irq = DMAC1_CH5_IRQn,
     .pdm_irq = PDM1_IRQn,
-    .pdm_irq_priority = 5, 
+    .pdm_irq_priority = 5,
     .channels = 1,
     .sample_rate = 16000,
     .channel_depth = 16,

src/fw/drivers/i2c/sf32lb.c

@@ -34,6 +34,28 @@ void i2c_irq_handler(I2CBus *bus) {
   portEND_SWITCHING_ISR(woken);
 }
 
+void i2c_dma_tx_irq_handler(I2CBus *bus) {
+  I2CBusHal *hal = bus->hal;
+  I2C_HandleTypeDef *hdl = &hal->state->hdl;
+
+  if (hdl->State == HAL_I2C_STATE_BUSY_TX) {
+    HAL_DMA_IRQHandler(&hal->state->hdma_tx);
+  } else if (hal->state->hdma_tx.State == HAL_DMA_STATE_BUSY) {
+    HAL_DMA_IRQHandler(&hal->state->hdma_tx);
+  }
+}
+
+void i2c_dma_rx_irq_handler(I2CBus *bus) {
+  I2CBusHal *hal = bus->hal;
+  I2C_HandleTypeDef *hdl = &hal->state->hdl;
+
+  if (hdl->State == HAL_I2C_STATE_BUSY_RX) {
+    HAL_DMA_IRQHandler(&hal->state->hdma_rx);
+  } else if (hal->state->hdma_rx.State == HAL_DMA_STATE_BUSY) {
+    HAL_DMA_IRQHandler(&hal->state->hdma_rx);
+  }
+}
+
 void i2c_hal_init_transfer(I2CBus *bus) {}
 
 void i2c_hal_abort_transfer(I2CBus *bus) {
@@ -59,11 +81,20 @@ void i2c_hal_start_transfer(I2CBus *bus) {
     }
   } else {
     if (transfer->direction == I2CTransferDirection_Read) {
-      ret =
-          HAL_I2C_Master_Receive_IT(hdl, transfer->device_address, transfer->data, transfer->size);
+      if (hal->state->hdma_rx.Instance != NULL) {
+        HAL_DMA_Init(&hal->state->hdma_rx);
+        mpu_dcache_invalidate(transfer->data, transfer->size);
+        ret = HAL_I2C_Master_Receive_DMA(hdl, transfer->device_address, transfer->data, transfer->size);
+      } else {
+        ret = HAL_I2C_Master_Receive_IT(hdl, transfer->device_address, transfer->data, transfer->size);
+      }
     } else {
-      ret =
-          HAL_I2C_Master_Transmit_IT(hdl, transfer->device_address, transfer->data, transfer->size);
+      if (hal->state->hdma_tx.Instance != NULL) {
+        HAL_DMA_Init(&hal->state->hdma_tx);
+        ret = HAL_I2C_Master_Transmit_DMA(hdl, transfer->device_address, transfer->data, transfer->size);
+      } else {
+        ret = HAL_I2C_Master_Transmit_IT(hdl, transfer->device_address, transfer->data, transfer->size);
+      }
     }
   }
 
@@ -109,6 +140,19 @@ void i2c_hal_init(I2CBus *bus) {
   ret = HAL_I2C_Init(hdl);
   PBL_ASSERTN(ret == HAL_OK);
 
+  if (hal->state->hdma_tx.Instance != NULL && hal->state->hdma_rx.Instance != NULL ) {
+    __HAL_LINKDMA(hdl, hdmatx, hal->state->hdma_tx);
+    __HAL_LINKDMA(hdl, hdmarx, hal->state->hdma_rx);
+
+    HAL_I2C_DMA_Init(hdl, &hal->state->dma_rx, &hal->state->dma_tx);
+
+    HAL_NVIC_SetPriority(hal->dma_tx_irqn, hal->dma_irq_priority, 0);
+    NVIC_EnableIRQ(hal->dma_tx_irqn);
+
+    HAL_NVIC_SetPriority(hal->dma_rx_irqn, hal->dma_irq_priority, 0);
+    NVIC_EnableIRQ(hal->dma_rx_irqn);
+  }
+
   HAL_NVIC_SetPriority(hal->irqn, hal->irq_priority, 0);
   NVIC_EnableIRQ(hal->irqn);
 }

src/fw/drivers/i2c/sf32lb.h

@@ -11,6 +11,10 @@
 
 typedef struct I2CBusHalState {
   I2C_HandleTypeDef hdl;
+  DMA_HandleTypeDef hdma_tx;
+  DMA_HandleTypeDef hdma_rx;
+  struct dma_config dma_tx;
+  struct dma_config dma_rx;
 } I2CBusHalState;
 
 typedef const struct I2CBusHal {
@@ -20,6 +24,11 @@ typedef const struct I2CBusHal {
   RCC_MODULE_TYPE module;
   IRQn_Type irqn;
   uint8_t irq_priority;
+  IRQn_Type dma_tx_irqn;
+  IRQn_Type dma_rx_irqn;
+  uint8_t dma_irq_priority;
 } I2CBusHal;
 
 void i2c_irq_handler(I2CBus *bus);
+void i2c_dma_tx_irq_handler(I2CBus *bus);
+void i2c_dma_rx_irq_handler(I2CBus *bus);