sw: add spi base

This is taken from fomu-flash, and needs to be adapted.

Signed-off-by: Sean Cross <sean@xobs.io>

sw/include/spi.h

@@ -0,0 +1,89 @@
+#ifndef BB_SPI_H_
+#define BB_SPI_H_
+
+#include <stdint.h>
+
+enum spi_state {
+	SS_UNCONFIGURED = 0,
+	SS_SINGLE,
+	SS_DUAL_RX,
+	SS_DUAL_TX,
+	SS_QUAD_RX,
+	SS_QUAD_TX,
+	SS_HARDWARE,
+};
+
+enum spi_type {
+	ST_UNCONFIGURED,
+	ST_SINGLE,
+	ST_DUAL,
+	ST_QUAD,
+	ST_QPI,
+};
+
+enum spi_pin {
+	SP_MOSI,
+	SP_MISO,
+	SP_HOLD,
+	SP_WP,
+	SP_CS,
+	SP_CLK,
+	SP_D0,
+	SP_D1,
+	SP_D2,
+	SP_D3,
+};
+
+struct spi_id {
+	uint8_t manufacturer_id;	// Result from 0x90
+	uint8_t device_id;		// Result from 0x90
+	uint8_t _manufacturer_id;	// Result from 0x9f
+	uint8_t memory_type;		// Result from 0x9f
+	uint8_t memory_size;		// Result from 0x9f
+	uint8_t signature;		// Result from 0xab
+	uint8_t serial[4];		// Result from 0x4b
+	int bytes;			// -1 if unknown
+	const char *manufacturer;
+	const char *model;
+	const char *capacity;
+};
+
+struct ff_spi;
+
+void spiPause(struct ff_spi *spi);
+void spiBegin(struct ff_spi *spi);
+void spiEnd(struct ff_spi *spi);
+
+//void spiSingleTx(struct ff_spi *spi, uint8_t out);
+//uint8_t spiSingleRx(struct ff_spi *spi);
+//void spiDualTx(struct ff_spi *spi, uint8_t out);
+//void spiQuadTx(struct ff_spi *spi, uint8_t out);
+void spiCommand(struct ff_spi *spi, uint8_t cmd);
+//uint8_t spiDualRx(struct ff_spi *spi);
+//uint8_t spiQuadRx(struct ff_spi *spi);
+int spiTx(struct ff_spi *spi, uint8_t word);
+uint8_t spiRx(struct ff_spi *spi);
+uint8_t spiReadStatus(struct ff_spi *spi, uint8_t sr);
+void spiWriteStatus(struct ff_spi *spi, uint8_t sr, uint8_t val);
+void spiReadSecurity(struct ff_spi *spi, uint8_t sr, uint8_t security[256]);
+void spiWriteSecurity(struct ff_spi *spi, uint8_t sr, uint8_t security[256]);
+int spiSetType(struct ff_spi *spi, enum spi_type type);
+int spiRead(struct ff_spi *spi, uint32_t addr, uint8_t *data, unsigned int count);
+
+struct spi_id spiId(struct ff_spi *spi);
+void spiOverrideSize(struct ff_spi *spi, uint32_t new_size);
+
+//int spi_wait_for_not_busy(struct ff_spi *spi);
+int spiWrite(struct ff_spi *spi, uint32_t addr, const uint8_t *data, unsigned int count);
+uint8_t spiReset(struct ff_spi *spi);
+int spiInit(struct ff_spi *spi);
+
+void spiHold(struct ff_spi *spi);
+void spiUnhold(struct ff_spi *spi);
+void spiSwapTxRx(struct ff_spi *spi);
+
+struct ff_spi *spiAlloc(void);
+void spiSetPin(struct ff_spi *spi, enum spi_pin pin, int val);
+void spiFree(struct ff_spi **spi);
+
+#endif /* BB_SPI_H_ */