adc: fix adc continuous driver conv_frame_size not bigger than 4092 issue

Closes https://github.com/espressif/esp-idf/issues/11385

components/driver/deprecated/adc_dma_legacy.c

@@ -207,7 +207,9 @@ esp_err_t adc_digi_initialize(const adc_digi_init_config_t *init_config)
     }
 
     //malloc dma descriptor
-    s_adc_digi_ctx->hal.rx_desc = heap_caps_calloc(1, (sizeof(dma_descriptor_t)) * INTERNAL_BUF_NUM, MALLOC_CAP_DMA);
+    uint32_t dma_desc_num_per_frame = (init_config->conv_num_each_intr + DMA_DESCRIPTOR_BUFFER_MAX_SIZE_4B_ALIGNED - 1) / DMA_DESCRIPTOR_BUFFER_MAX_SIZE_4B_ALIGNED;
+    uint32_t dma_desc_max_num = dma_desc_num_per_frame * INTERNAL_BUF_NUM;
+    s_adc_digi_ctx->hal.rx_desc = heap_caps_calloc(1, (sizeof(dma_descriptor_t)) * dma_desc_max_num, MALLOC_CAP_DMA);
     if (!s_adc_digi_ctx->hal.rx_desc) {
         ret = ESP_ERR_NO_MEM;
         goto cleanup;
@@ -310,7 +312,8 @@ esp_err_t adc_digi_initialize(const adc_digi_init_config_t *init_config)
 #elif CONFIG_IDF_TARGET_ESP32
         .dev = (void *)I2S_LL_GET_HW(s_adc_digi_ctx->i2s_host),
 #endif
-        .desc_max_num = INTERNAL_BUF_NUM,
+        .eof_desc_num = INTERNAL_BUF_NUM,
+        .eof_step = dma_desc_num_per_frame,
         .dma_chan = dma_chan,
         .eof_num = init_config->conv_num_each_intr / SOC_ADC_DIGI_DATA_BYTES_PER_CONV
     };
@@ -367,15 +370,16 @@ static IRAM_ATTR bool s_adc_dma_intr(adc_digi_context_t *adc_digi_ctx)
     portBASE_TYPE taskAwoken = 0;
     BaseType_t ret;
     adc_hal_dma_desc_status_t status = false;
-    dma_descriptor_t *current_desc = NULL;
+    uint8_t *finished_buffer = NULL;
+    uint32_t finished_size = 0;
 
     while (1) {
-        status = adc_hal_get_reading_result(&adc_digi_ctx->hal, adc_digi_ctx->rx_eof_desc_addr, &current_desc);
+        status = adc_hal_get_reading_result(&adc_digi_ctx->hal, adc_digi_ctx->rx_eof_desc_addr, &finished_buffer, &finished_size);
         if (status != ADC_HAL_DMA_DESC_VALID) {
             break;
         }
 
-        ret = xRingbufferSendFromISR(adc_digi_ctx->ringbuf_hdl, current_desc->buffer, current_desc->dw0.length, &taskAwoken);
+        ret = xRingbufferSendFromISR(adc_digi_ctx->ringbuf_hdl, finished_buffer, finished_size, &taskAwoken);
         if (ret == pdFALSE) {
             //ringbuffer overflow
             adc_digi_ctx->ringbuf_overflow_flag = 1;

components/esp_adc/adc_continuous.c

@@ -134,7 +134,9 @@ esp_err_t adc_continuous_new_handle(const adc_continuous_handle_cfg_t *hdl_confi
     }
 
     //malloc dma descriptor
-    adc_ctx->hal.rx_desc = heap_caps_calloc(1, (sizeof(dma_descriptor_t)) * INTERNAL_BUF_NUM, MALLOC_CAP_INTERNAL | MALLOC_CAP_DMA);
+    uint32_t dma_desc_num_per_frame = (hdl_config->conv_frame_size + DMA_DESCRIPTOR_BUFFER_MAX_SIZE_4B_ALIGNED - 1) / DMA_DESCRIPTOR_BUFFER_MAX_SIZE_4B_ALIGNED;
+    uint32_t dma_desc_max_num = dma_desc_num_per_frame * INTERNAL_BUF_NUM;
+    adc_ctx->hal.rx_desc = heap_caps_calloc(1, (sizeof(dma_descriptor_t)) * dma_desc_max_num, MALLOC_CAP_INTERNAL | MALLOC_CAP_DMA);
     if (!adc_ctx->hal.rx_desc) {
         ret = ESP_ERR_NO_MEM;
         goto cleanup;
@@ -224,7 +226,8 @@ esp_err_t adc_continuous_new_handle(const adc_continuous_handle_cfg_t *hdl_confi
 #elif CONFIG_IDF_TARGET_ESP32
         .dev = (void *)I2S_LL_GET_HW(adc_ctx->i2s_host),
 #endif
-        .desc_max_num = INTERNAL_BUF_NUM,
+        .eof_desc_num = INTERNAL_BUF_NUM,
+        .eof_step = dma_desc_num_per_frame,
         .dma_chan = dma_chan,
         .eof_num = hdl_config->conv_frame_size / SOC_ADC_DIGI_DATA_BYTES_PER_CONV
     };
@@ -286,21 +289,22 @@ static IRAM_ATTR bool s_adc_dma_intr(adc_continuous_ctx_t *adc_digi_ctx)
     bool need_yield = false;
     BaseType_t ret;
     adc_hal_dma_desc_status_t status = false;
-    dma_descriptor_t *current_desc = NULL;
+    uint8_t *finished_buffer = NULL;
+    uint32_t finished_size = 0;
 
     while (1) {
-        status = adc_hal_get_reading_result(&adc_digi_ctx->hal, adc_digi_ctx->rx_eof_desc_addr, &current_desc);
+        status = adc_hal_get_reading_result(&adc_digi_ctx->hal, adc_digi_ctx->rx_eof_desc_addr, &finished_buffer, &finished_size);
         if (status != ADC_HAL_DMA_DESC_VALID) {
             break;
         }
 
-        ret = xRingbufferSendFromISR(adc_digi_ctx->ringbuf_hdl, current_desc->buffer, current_desc->dw0.length, &taskAwoken);
+        ret = xRingbufferSendFromISR(adc_digi_ctx->ringbuf_hdl, finished_buffer, finished_size, &taskAwoken);
         need_yield |= (taskAwoken == pdTRUE);
 
         if (adc_digi_ctx->cbs.on_conv_done) {
             adc_continuous_evt_data_t edata = {
-                .conv_frame_buffer = current_desc->buffer,
-                .size = current_desc->dw0.length,
+                .conv_frame_buffer = finished_buffer,
+                .size = finished_size,
             };
             if (adc_digi_ctx->cbs.on_conv_done(adc_digi_ctx, &edata, adc_digi_ctx->user_data)) {
                 need_yield |= true;

components/hal/adc_hal.c

@@ -96,7 +96,8 @@ void adc_hal_dma_ctx_config(adc_hal_dma_ctx_t *hal, const adc_hal_dma_config_t *
 {
     hal->desc_dummy_head.next = hal->rx_desc;
     hal->dev = config->dev;
-    hal->desc_max_num = config->desc_max_num;
+    hal->eof_desc_num = config->eof_desc_num;
+    hal->eof_step = config->eof_step;
     hal->dma_chan = config->dma_chan;
     hal->eof_num = config->eof_num;
 }
@@ -228,23 +229,33 @@ void adc_hal_digi_controller_config(adc_hal_dma_ctx_t *hal, const adc_hal_digi_c
     adc_hal_digi_sample_freq_config(hal, cfg->clk_src, cfg->clk_src_freq_hz, cfg->sample_freq_hz);
 }
 
-static void adc_hal_digi_dma_link_descriptors(dma_descriptor_t *desc, uint8_t *data_buf, uint32_t size, uint32_t num)
+static void adc_hal_digi_dma_link_descriptors(dma_descriptor_t *desc, uint8_t *data_buf, uint32_t per_eof_size, uint32_t eof_step, uint32_t eof_num)
 {
     HAL_ASSERT(((uint32_t)data_buf % 4) == 0);
-    HAL_ASSERT((size % 4) == 0);
+    HAL_ASSERT((per_eof_size % 4) == 0);
     uint32_t n = 0;
 
-    while (num--) {
-        desc[n] = (dma_descriptor_t) {
-            .dw0.size = size,
-            .dw0.length = 0,
-            .dw0.suc_eof = 0,
-            .dw0.owner = 1,
-            .buffer = data_buf,
-            .next = &desc[n+1]
-        };
-        data_buf += size;
-        n++;
+    while (eof_num--) {
+        uint32_t eof_size = per_eof_size;
+
+        for (int i = 0; i < eof_step; i++) {
+            uint32_t this_len = eof_size;
+            if (this_len > DMA_DESCRIPTOR_BUFFER_MAX_SIZE_4B_ALIGNED) {
+                this_len = DMA_DESCRIPTOR_BUFFER_MAX_SIZE_4B_ALIGNED;
+            }
+
+            desc[n] = (dma_descriptor_t) {
+                .dw0.size = this_len,
+                .dw0.length = 0,
+                .dw0.suc_eof = 0,
+                .dw0.owner = 1,
+                .buffer = data_buf,
+                .next = &desc[n+1]
+            };
+            eof_size -= this_len;
+            data_buf += this_len;
+            n++;
+        }
     }
     desc[n-1].next = NULL;
 }
@@ -261,7 +272,7 @@ void adc_hal_digi_start(adc_hal_dma_ctx_t *hal, uint8_t *data_buf)
 
     //reset the current descriptor address
     hal->cur_desc_ptr = &hal->desc_dummy_head;
-    adc_hal_digi_dma_link_descriptors(hal->rx_desc, data_buf, hal->eof_num * SOC_ADC_DIGI_DATA_BYTES_PER_CONV, hal->desc_max_num);
+    adc_hal_digi_dma_link_descriptors(hal->rx_desc, data_buf, hal->eof_num * SOC_ADC_DIGI_DATA_BYTES_PER_CONV, hal->eof_step, hal->eof_desc_num);
 
     //start DMA
     adc_dma_ll_rx_start(hal->dev, hal->dma_chan, (lldesc_t *)hal->rx_desc);
@@ -283,18 +294,36 @@ bool adc_hal_check_event(adc_hal_dma_ctx_t *hal, uint32_t mask)
 }
 #endif  //#if !SOC_GDMA_SUPPORTED
 
-adc_hal_dma_desc_status_t adc_hal_get_reading_result(adc_hal_dma_ctx_t *hal, const intptr_t eof_desc_addr, dma_descriptor_t **cur_desc)
+adc_hal_dma_desc_status_t adc_hal_get_reading_result(adc_hal_dma_ctx_t *hal, const intptr_t eof_desc_addr, uint8_t **buffer, uint32_t *len)
 {
     HAL_ASSERT(hal->cur_desc_ptr);
+
     if (!hal->cur_desc_ptr->next) {
         return ADC_HAL_DMA_DESC_NULL;
     }
+
     if ((intptr_t)hal->cur_desc_ptr == eof_desc_addr) {
         return ADC_HAL_DMA_DESC_WAITING;
     }
 
-    hal->cur_desc_ptr = hal->cur_desc_ptr->next;
-    *cur_desc = hal->cur_desc_ptr;
+    uint8_t *buffer_start = NULL;
+    uint32_t eof_len = 0;
+    dma_descriptor_t *eof_desc = hal->cur_desc_ptr;
+
+    //Find the eof list start
+    eof_desc = eof_desc->next;
+    buffer_start = eof_desc->buffer;
+    eof_len += eof_desc->dw0.length;
+
+    //Find the eof list end
+    for (int i = 1; i < hal->eof_step; i++) {
+        eof_desc = eof_desc->next;
+        eof_len += eof_desc->dw0.length;
+    }
+
+    hal->cur_desc_ptr = eof_desc;
+    *buffer = buffer_start;
+    *len = eof_len;
 
     return ADC_HAL_DMA_DESC_VALID;
 }

components/hal/include/hal/adc_hal.h

@@ -55,7 +55,8 @@ typedef enum adc_hal_dma_desc_status_t {
  */
 typedef struct adc_hal_dma_config_t {
     void                *dev;               ///< DMA peripheral address
-    uint32_t            desc_max_num;       ///< Number of the descriptors linked once
+    uint32_t            eof_desc_num;       ///< Number of dma descriptors that is eof
+    uint32_t            eof_step;           ///< Number of linked descriptors that is one eof
     uint32_t            dma_chan;           ///< DMA channel to be used
     uint32_t            eof_num;            ///< Bytes between 2 in_suc_eof interrupts
 } adc_hal_dma_config_t;
@@ -73,7 +74,8 @@ typedef struct adc_hal_dma_ctx_t {
 
     /**< these need to be configured by `adc_hal_dma_config_t` via driver layer*/
     void                *dev;               ///< DMA address
-    uint32_t            desc_max_num;       ///< Number of the descriptors linked once
+    uint32_t            eof_desc_num;       ///< Number of dma descriptors that is eof
+    uint32_t            eof_step;           ///< Number of linked descriptors that is one eof
     uint32_t            dma_chan;           ///< DMA channel to be used
     uint32_t            eof_num;            ///< Words between 2 in_suc_eof interrupts
 } adc_hal_dma_ctx_t;
@@ -175,11 +177,12 @@ bool adc_hal_check_event(adc_hal_dma_ctx_t *hal, uint32_t mask);
  *
  * @param      hal           Context of the HAL
  * @param      eof_desc_addr The last descriptor that is finished by HW. Should be got from DMA
- * @param[out] cur_desc      The descriptor with ADC reading result (from the 1st one to the last one (``eof_desc_addr``))
+ * @param[out] buffer        ADC reading result buffer
+ * @param[out] len           ADC reading result len
  *
  * @return                   See ``adc_hal_dma_desc_status_t``
  */
-adc_hal_dma_desc_status_t adc_hal_get_reading_result(adc_hal_dma_ctx_t *hal, const intptr_t eof_desc_addr, dma_descriptor_t **cur_desc);
+adc_hal_dma_desc_status_t adc_hal_get_reading_result(adc_hal_dma_ctx_t *hal, const intptr_t eof_desc_addr, uint8_t **buffer, uint32_t *len);
 
 /**
  * @brief Clear interrupt

components/hal/include/hal/dma_types.h

@@ -36,6 +36,8 @@ ESP_STATIC_ASSERT(sizeof(dma_descriptor_t) == 12, "dma_descriptor_t should occup
 #define DMA_DESCRIPTOR_BUFFER_OWNER_CPU (0)   /*!< DMA buffer is allowed to be accessed by CPU */
 #define DMA_DESCRIPTOR_BUFFER_OWNER_DMA (1)   /*!< DMA buffer is allowed to be accessed by DMA engine */
 #define DMA_DESCRIPTOR_BUFFER_MAX_SIZE (4095) /*!< Maximum size of the buffer that can be attached to descriptor */
+#define DMA_DESCRIPTOR_BUFFER_MAX_SIZE_4B_ALIGNED  (4095-3)  /*!< Maximum size of the buffer that can be attached to descriptor, and aligned to 4B */
+
 
 #ifdef __cplusplus
 }