include/spi.h

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#ifndef SPI_H_INCLUDED
#define SPI_H_INCLUDED

#include <status_codes.h>
#include <workqueue.h>
#include <interrupt.h>

#define SPI_CPHA        (1 << 0)

#define SPI_CPOL        (1 << 1)

#define SPI_MODE_0      0

#define SPI_MODE_1      (SPI_CPHA)

#define SPI_MODE_2      (SPI_CPOL)

#define SPI_MODE_3      (SPI_CPOL | SPI_CPHA)

struct spi_master {
        struct nested_workqueue nwq;
        enum status_code        status;
        size_t                  residue;
};

#include <chip/spi.h>

static inline bool spi_request_bus(struct spi_master *master,
                struct workqueue_task *task)
{
        return nested_workqueue_add_task(&master->nwq, task);
}

static inline void spi_release_bus(struct spi_master *master)
{
        nested_workqueue_next_task(&master->nwq);
}

#endif /* SPI_H_INCLUDED */

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