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#ifndef SSC_BUFFER_H_

#define SSC_BUFFER_H_

#include "iso14443.h"

#define SSC_RX_BUFFER_SIZE_AS_UINT8 2048

#define SSC_DMA_BUFFER_COUNT 0

/* in bytes, used for the sample buffer that holds the subcarrier modulation data at fc/8 = 1695 MHz */

#define SSC_TX_BUFFER_SIZE_AS_UINT8 ((MAXIMUM_FRAME_SIZE*( (8+1)*2 ) ) + 2 + 2)

#if SSC_RX_BUFFER_SIZE_AS_UINT8 < DIV_ROUND_UP((ISO14443A_MAX_RX_FRAME_SIZE_IN_BITS*ISO14443A_SAMPLE_LEN),8)

#undef SSC_RX_BUFFER_SIZE_AS_UINT8

#define SSC_RX_BUFFER_SIZE_AS_UINT8 DIV_ROUND_UP((ISO14443A_MAX_RX_FRAME_SIZE_IN_BITS*ISO14443A_SAMPLE_LEN),8)

#endif

typedef enum {

	SSC_FREE=0,    /* Buffer is free */

	SSC_PENDING,   /* Buffer has been given to the DMA controller and is currently being filled */

	SSC_FULL,      /* DMA controller signalled that the buffer is full */

	SSC_PROCESSING,/* The buffer is currently processed by the consumer (e.g. decoder) */

	SSC_PREFILLED, /* The buffer has been prefilled for later usage (only used for TX) */

} ssc_dma_buffer_state_t;

enum ssc_mode {

	SSC_MODE_NONE,

	SSC_MODE_14443A,

};

typedef struct {

	enum ssc_mode mode;

	u_int16_t transfersize_ssc;

	u_int16_t transfersize_pdc;

	u_int16_t transfers;

} ssc_mode_def;

typedef struct {

	volatile ssc_dma_buffer_state_t state;

	u_int32_t len_transfers;            /* Length of the content, in transfers */

	struct {

		int overflow:1;

	} flags;

	const ssc_mode_def *reception_mode; /* Pointer to the SSC mode definition that the buffer has been loaded for (affects element size and count) */

	u_int8_t data[SSC_RX_BUFFER_SIZE_AS_UINT8];

} ssc_dma_rx_buffer_t;

typedef struct {

	volatile ssc_dma_buffer_state_t state;

	u_int32_t len;  /* Length of the content in bytes */

	void *source; /* Source pointer for a prefilled buffer; set to NULL if not used */

	u_int8_t data[SSC_TX_BUFFER_SIZE_AS_UINT8];

} ssc_dma_tx_buffer_t;

#endif /*SSC_BUFFER_H_*/