sdio_slave: allow disabling highspeed mode

components/driver/include/driver/sdio_slave.h

@@ -48,6 +48,9 @@ typedef struct {
         the internal pull-ups are not sufficient for stable communication, please do connect external pull-ups on the
         bus. This is only for example and debug use.
         */
+#define SDIO_SLAVE_FLAG_DEFAULT_SPEED       BIT(3)      /**< Disable the highspeed support of the hardware. */
+#define SDIO_SLAVE_FLAG_HIGH_SPEED          0           /**< Enable the highspeed support of the hardware. This is the
+        default option. The host will see highspeed capability, but the mode actually used is determined by the host. */
 } sdio_slave_config_t;
 
 /** Handle of a receive buffer, register a handle by calling ``sdio_slave_recv_register_buf``. Use the handle to load the buffer to the

components/driver/sdio_slave.c

@@ -230,6 +230,7 @@ static esp_err_t init_context(const sdio_slave_config_t *config)
 
     context.hal->sending_mode = config->sending_mode;
     context.hal->timing = config->timing;
+    context.hal->no_highspeed = (config->flags & SDIO_SLAVE_FLAG_DEFAULT_SPEED) == SDIO_SLAVE_FLAG_DEFAULT_SPEED;
     context.hal->send_queue_size = config->send_queue_size;
     context.hal->recv_buffer_size = config->recv_buffer_size;
     //initialize ringbuffer resources
@@ -312,7 +313,6 @@ static inline esp_err_t sdio_slave_hw_init(sdio_slave_config_t *config)
     periph_module_enable(PERIPH_SDIO_SLAVE_MODULE);
 
     sdio_slave_hal_hw_init(context.hal);
-
     return ESP_OK;
 }
 

components/hal/include/hal/sdio_slave_hal.h

@@ -1,16 +1,8 @@
-// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
+/*
-//
+ * SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
-// Licensed under the Apache License, Version 2.0 (the "License");
+ *
-// you may not use this file except in compliance with the License.
+ * SPDX-License-Identifier: Apache-2.0
-// You may obtain a copy of the License at
+ */
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 /*******************************************************************************
  * NOTICE
@@ -210,6 +202,10 @@ typedef struct {
                                              * configured before using the HAL. `SDIO_SLAVE_TIMING_PSEND_PSAMPLE` is
                                              * recommended by default.
                                              */
+    //some boolean flags
+    struct {
+        uint32_t no_highspeed: 1;           /**< Disable the highspeed support */
+    };
     int                 send_queue_size;    /**< Max buffers that can be queued before sending. Should be manually
                                              * configured before using the HAL.
                                              */
@@ -220,6 +216,7 @@ typedef struct {
     sdio_ringbuf_t      send_desc_queue;            /**< The ring buffer used to hold queued descriptors. Should be manually
                                              * initialized before using the HAL.
                                              */
+
     //Internal status, no need to touch.
     send_state_t        send_state;         // Current state of sending part.
     uint32_t            tail_pkt_len;       // The accumulated send length of the tail packet.

components/hal/include/hal/sdio_slave_types.h

@@ -25,9 +25,14 @@ typedef enum {
 /// Timing of SDIO slave
 typedef enum {
     SDIO_SLAVE_TIMING_PSEND_PSAMPLE = 0,/**< Send at posedge, and sample at posedge. Default value for HS mode.
+                                         *   If :c:macro:`SDIO_SLAVE_FLAG_HIGH_SPEED` is specified in
+                                         *   :cpp:class:`sdio_slave_config_t`, this should be selected.
                                          *   Normally there's no problem using this to work in DS mode.
                                          */
-    SDIO_SLAVE_TIMING_NSEND_PSAMPLE    ,///< Send at negedge, and sample at posedge. Default value for DS mode and below.
+    SDIO_SLAVE_TIMING_NSEND_PSAMPLE,    /**< Send at negedge, and sample at posedge. Default value for DS mode and
+                                         *   below. If :c:macro:`SDIO_SLAVE_FLAG_DEFAULT_SPEED` is specified in
+                                         *   :cpp:class:`sdio_slave_config_t`, this should be selected.
+                                         */
     SDIO_SLAVE_TIMING_PSEND_NSAMPLE,    ///< Send at posedge, and sample at negedge
     SDIO_SLAVE_TIMING_NSEND_NSAMPLE,    ///< Send at negedge, and sample at negedge
 } sdio_slave_timing_t;

components/hal/sdio_slave_hal.c

@@ -168,7 +168,7 @@ void sdio_slave_hal_init(sdio_slave_context_t *hal)
 void sdio_slave_hal_hw_init(sdio_slave_context_t *hal)
 {
     sdio_slave_ll_init(hal->slc);
-    sdio_slave_ll_enable_hs(hal->hinf, true);
+    sdio_slave_ll_enable_hs(hal->hinf, !hal->no_highspeed);
     sdio_slave_ll_set_timing(hal->host, hal->timing);
     sdio_slave_ll_slvint_t intr_ena = 0xff;
     sdio_slave_ll_slvint_set_ena(hal->slc, &intr_ena);

tools/ci/check_copyright_ignore.txt

@@ -778,7 +778,6 @@ components/hal/include/hal/esp_flash_err.h
 components/hal/include/hal/mpu_hal.h
 components/hal/include/hal/mpu_types.h
 components/hal/include/hal/rtc_io_types.h
-components/hal/include/hal/sdio_slave_hal.h
 components/hal/include/hal/sdio_slave_ll.h
 components/hal/include/hal/sha_hal.h
 components/hal/include/hal/spi_flash_encrypt_hal.h