1 files changed, 244 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/drivers_nrf/sdio/sdio.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/drivers_nrf/sdio/sdio.c
new file mode 100644
index 0000000..68763b0
--- /dev/null
+++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/drivers_nrf/sdio/sdio.c
@@ -0,0 +1,244 @@
+/**
+ * Copyright (c) 2009 - 2018, Nordic Semiconductor ASA
+ * 
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form, except as embedded into a Nordic
+ *    Semiconductor ASA integrated circuit in a product or a software update for
+ *    such product, must reproduce the above copyright notice, this list of
+ *    conditions and the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ * 
+ * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ * 
+ * 4. This software, with or without modification, must only be used with a
+ *    Nordic Semiconductor ASA integrated circuit.
+ * 
+ * 5. Any software provided in binary form under this license must not be reverse
+ *    engineered, decompiled, modified and/or disassembled.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+#include <stdint.h>
+
+#include "nrf.h"
+#include "nrf_delay.h"
+#include "sdio.h"
+#include "nrf_gpio.h"
+
+#include "sdio_config.h"
+
+/*lint ++flb "Enter library region" */
+
+/*lint -e717 -save "Suppress do {} while (0) for these macros" */
+#define SDIO_CLOCK_HIGH()   do { NRF_GPIO->OUTSET = (1UL << SDIO_CONFIG_CLOCK_PIN_NUMBER); } while (0) /*!< Pulls SCL line high */
+#define SDIO_CLOCK_LOW()    do { NRF_GPIO->OUTCLR = (1UL << SDIO_CONFIG_CLOCK_PIN_NUMBER); } while (0) /*!< Pulls SCL line low */
+#define SDIO_DATA_HIGH()    do { NRF_GPIO->OUTSET = (1UL << SDIO_CONFIG_DATA_PIN_NUMBER); } while (0)  /*!< Pulls SDA line high */
+#define SDIO_DATA_LOW()     do { NRF_GPIO->OUTCLR = (1UL << SDIO_CONFIG_DATA_PIN_NUMBER); } while (0)  /*!< Pulls SDA line low */
+#define SDIO_DATA_OUTPUT()  do { NRF_GPIO->DIRSET = (1UL << SDIO_CONFIG_DATA_PIN_NUMBER); } while (0)  /*!< Configures SDA pin as output */
+#define SDIO_CLOCK_OUTPUT() do { NRF_GPIO->DIRSET = (1UL << SDIO_CONFIG_CLOCK_PIN_NUMBER); } while (0) /*!< Configures SCL pin as output */
+/*lint -restore */
+
+/*lint -emacro(845,SDIO_DATA_INPUT) // A zero has been given as right argument to operator '|'" */
+
+#define SDIO_DATA_INPUT() do {                       \
+        nrf_gpio_cfg_input(25, NRF_GPIO_PIN_NOPULL); \
+} while (0)
+
+#define SDIO_DATA_READ()  ((NRF_GPIO->IN >> SDIO_CONFIG_DATA_PIN_NUMBER) & 0x1UL)  /*!< Reads current state of SDA */
+#define SDIO_CLOCK_READ() ((NRF_GPIO->IN >> SDIO_CONFIG_CLOCK_PIN_NUMBER) & 0x1UL) /*!< Reads current state of SCL */
+#define SDIO_DELAY()      nrf_delay_us(10)                                         /*!< Time to wait when pin states are changed. For fast-mode the delay can be zero and for standard-mode 4 us delay is sufficient. */
+
+void sdio_init(void)
+{
+    SDIO_CLOCK_HIGH();
+    SDIO_DATA_HIGH();
+    SDIO_CLOCK_OUTPUT();
+    SDIO_DATA_INPUT();
+
+    // If slave is stuck in the middle of transfer, clock out bits until the slave ACKs the transfer
+    for (uint_fast8_t i = 16; i--;)
+    {
+        SDIO_DELAY();
+        SDIO_CLOCK_LOW();
+        SDIO_DELAY();
+        SDIO_CLOCK_HIGH();
+        SDIO_DELAY();
+
+        if (SDIO_DATA_READ())
+        {
+            break;
+        }
+    }
+
+    for (uint_fast8_t i = 5; i--;)
+    {
+        SDIO_DELAY();
+        SDIO_CLOCK_LOW();
+        SDIO_DELAY();
+        SDIO_CLOCK_HIGH();
+    }
+
+    SDIO_DATA_OUTPUT();
+    SDIO_DATA_HIGH();
+
+    SDIO_DELAY();
+}
+
+uint8_t sdio_read_byte(uint8_t address)
+{
+    uint8_t data_byte = 0;
+
+    SDIO_DATA_OUTPUT();
+
+    for (uint_fast8_t i = 8; i--;)
+    {
+        SDIO_DELAY();
+
+        SDIO_CLOCK_LOW();
+
+        if (address & (1U << i))
+        {
+            SDIO_DATA_HIGH();
+        }
+        else
+        {
+            SDIO_DATA_LOW();
+        }
+
+        SDIO_DELAY();
+
+        SDIO_CLOCK_HIGH();
+    }
+
+    nrf_delay_us(20);
+
+    SDIO_DATA_INPUT();
+
+    for (uint_fast8_t i = 8; i--;)
+    {
+        SDIO_CLOCK_LOW();
+        SDIO_DELAY();
+        SDIO_CLOCK_HIGH();
+        SDIO_DELAY();
+        data_byte |= (uint8_t)(SDIO_DATA_READ() << i);
+    }
+
+    SDIO_DATA_HIGH();
+    SDIO_DATA_OUTPUT();
+
+    SDIO_DELAY();
+
+    return data_byte;
+}
+
+void sdio_read_burst(uint8_t * target_buffer, uint8_t target_buffer_size)
+{
+    uint_fast8_t address = 0x63;
+
+    SDIO_DATA_OUTPUT();
+
+    for (uint_fast8_t bit_index=8; bit_index--;)
+    {
+        SDIO_CLOCK_LOW();
+
+        if (address & (1U << bit_index))
+        {
+            SDIO_DATA_HIGH();
+        }
+        else
+        {
+            SDIO_DATA_LOW();
+        }
+
+        SDIO_CLOCK_HIGH();
+    }
+
+    SDIO_DATA_INPUT();
+
+    for (uint_fast8_t target_buffer_index = 0; target_buffer_index < target_buffer_size; target_buffer_index++)
+    {
+        target_buffer[target_buffer_index] = 0;
+
+        for (uint_fast8_t bit_index = 8; bit_index--;)
+        {
+            SDIO_CLOCK_LOW();
+            SDIO_CLOCK_HIGH();
+            target_buffer[target_buffer_index] |= (uint8_t)(SDIO_DATA_READ() << bit_index);
+        }
+    }
+}
+
+void sdio_write_byte(uint8_t address, uint8_t data_byte)
+{
+    // Add write indication bit
+    address |= 0x80;
+
+    SDIO_DATA_OUTPUT();
+
+    for (uint_fast8_t i = 8; i--;)
+    {
+        SDIO_DELAY();
+
+        SDIO_CLOCK_LOW();
+
+        if (address & (1U << i))
+        {
+            SDIO_DATA_HIGH();
+        }
+        else
+        {
+            SDIO_DATA_LOW();
+        }
+
+        SDIO_DELAY();
+
+        SDIO_CLOCK_HIGH();
+    }
+
+    SDIO_DELAY();
+
+    for (uint_fast8_t i = 8; i--;)
+    {
+        SDIO_CLOCK_LOW();
+
+        if (data_byte & (1U << i))
+        {
+            SDIO_DATA_HIGH();
+        }
+        else
+        {
+            SDIO_DATA_LOW();
+        }
+
+        SDIO_DELAY();
+
+        SDIO_CLOCK_HIGH();
+
+        SDIO_DELAY();
+    }
+
+    SDIO_DATA_HIGH();
+
+    SDIO_DELAY();
+}
+
+/*lint --flb "Leave library region" */