SDHostCC32XX.h

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/*
 * Copyright (c) 2016-2019, Texas Instruments Incorporated
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/*!***************************************************************************
 *  @file       SDHostCC32XX.h
 *  @brief      SDHost driver implementation for CC32XX devices.
 *
 *  The SDHost header file should be included in an application as follows:
 *  @code
 *  #include <ti/drivers/SD.h>
 *  #include <ti/drivers/sd/SDHostCC32XX.h>
 *  @endcode
 *
 *  Refer to @ref SD.h for a complete description of APIs & example of use.
 *
 *  This SDHost driver implementation is designed to operate on a CC32XX
 *  SD Host controller using a micro DMA controller.
 *
 *  Note: The driver API's are not thread safe and must not be accessed through
 *      multiple threads without the use of mutexes.
 *
 *  ## DMA buffer alignment #
 *
 *  When performing disk operations with a word aligned buffer the driver will
 *  make transfers using the DMA controller. Alternatively, if the buffer is
 *  not aligned, the data will be copied to the internal SD Host controller
 *  buffer using a polling method.
 *
 *  ## DMA Interrupts #
 *
 *  When DMA is used, the micro DMA controller generates and IRQ on the
 *  perpheral's interrupt vector. This implementation automatically installs
 *  a DMA interrupt to service the assigned micro DMA channels.
 *
 *  ## DMA accessible memory #
 *
 *  When DMA is used, it is the responsibility of the application to ensure
 *  that read/write buffers reside in memory that is accessible by the DMA.
 *
 *  <hr>
 */

#ifndef ti_drivers_sd_SDHostCC32XX__include
#define ti_drivers_sd_SDHostCC32XX__include

#include <stdint.h>
#include <ti/drivers/SD.h>

#include <ti/drivers/dpl/HwiP.h>
#include <ti/drivers/dpl/SemaphoreP.h>
#include <ti/drivers/Power.h>
#include <ti/drivers/power/PowerCC32XX.h>
#include <ti/drivers/dma/UDMACC32XX.h>

#ifdef __cplusplus
extern "C" {
#endif

#define SDHostCC32XX_PIN_06_SDCARD_DATA  0x0805
#define SDHostCC32XX_PIN_07_SDCARD_CLK   0x0806
#define SDHostCC32XX_PIN_08_SDCARD_CMD   0x0807
#define SDHostCC32XX_PIN_01_SDCARD_CLK   0x0600
#define SDHostCC32XX_PIN_02_SDCARD_CMD   0x0601
#define SDHostCC32XX_PIN_64_SDCARD_DATA  0x063f

/* SDHost function table */
extern const SD_FxnTable sdHostCC32XX_fxnTable;

typedef struct {
    uint_fast32_t clkRate;

    int_fast32_t intPriority;

    uint_fast32_t baseAddr;

    unsigned long rxChIdx;

    unsigned long txChIdx;

    uint32_t dataPin;

    uint32_t cmdPin;

    uint32_t clkPin;
} SDHostCC32XX_HWAttrsV1;

typedef struct {
    /* Relative Card Address */
    volatile uint32_t     rca;
    /* Number of sectors written */
    volatile uint32_t     sectorCount;
    /* Read data pointer */
    volatile uint32_t     *buffer;
    /*
     *  Semaphore to suspend thread execution when waiting for SD Commands
     *  or data transfers to complete.
     */
    SemaphoreP_Handle      cmdSem;
    /* SD Card interrupt handle. */
    HwiP_Handle            hwiHandle;
    /* UDMA Handle */
    UDMACC32XX_Handle      dmaHandle;
    /* Determined from base address */
    unsigned int           powerMgrId;
    /* LPDS wake-up notify object */
    Power_NotifyObj        postNotify;
    /* Previous park state SDCARD_CLK pin */
    PowerCC32XX_ParkState  prevParkCLK;
    /* SDCARD_CLK pin */
    uint16_t               clkPin;
    /* SD Card command state */
    volatile int_fast8_t   stat;
    /* State of the driver (open or closed) */
    bool                   isOpen;
    /* Indicates if a DMA transfer is in a ping or pong state */
    bool                    ping;
    /* Indicates if a semaphore has been posted for a DMA event */
    bool                    dmaPosted;
    /* SDCard Card Command Class (CCC) */
    SD_CardType            cardType;
} SDHostCC32XX_Object;

#ifdef __cplusplus
}
#endif

#endif /* ti_drivers_sd_SDHostCC32XX__include */