📄 atmel_spi.h
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/* * Register definitions for the Atmel AT32/AT91 SPI Controller *//* Register offsets */#define ATMEL_SPI_CR 0x0000#define ATMEL_SPI_MR 0x0004#define ATMEL_SPI_RDR 0x0008#define ATMEL_SPI_TDR 0x000c#define ATMEL_SPI_SR 0x0010#define ATMEL_SPI_IER 0x0014#define ATMEL_SPI_IDR 0x0018#define ATMEL_SPI_IMR 0x001c#define ATMEL_SPI_CSR(x) (0x0030 + 4 * (x))#define ATMEL_SPI_VERSION 0x00fc/* Bits in CR */#define ATMEL_SPI_CR_SPIEN (1 << 0)#define ATMEL_SPI_CR_SPIDIS (1 << 1)#define ATMEL_SPI_CR_SWRST (1 << 7)#define ATMEL_SPI_CR_LASTXFER (1 << 24)/* Bits in MR */#define ATMEL_SPI_MR_MSTR (1 << 0)#define ATMEL_SPI_MR_PS (1 << 1)#define ATMEL_SPI_MR_PCSDEC (1 << 2)#define ATMEL_SPI_MR_FDIV (1 << 3)#define ATMEL_SPI_MR_MODFDIS (1 << 4)#define ATMEL_SPI_MR_LLB (1 << 7)#define ATMEL_SPI_MR_PCS(x) (((x) & 15) << 16)#define ATMEL_SPI_MR_DLYBCS(x) ((x) << 24)/* Bits in RDR */#define ATMEL_SPI_RDR_RD(x) (x)#define ATMEL_SPI_RDR_PCS(x) ((x) << 16)/* Bits in TDR */#define ATMEL_SPI_TDR_TD(x) (x)#define ATMEL_SPI_TDR_PCS(x) ((x) << 16)#define ATMEL_SPI_TDR_LASTXFER (1 << 24)/* Bits in SR/IER/IDR/IMR */#define ATMEL_SPI_SR_RDRF (1 << 0)#define ATMEL_SPI_SR_TDRE (1 << 1)#define ATMEL_SPI_SR_MODF (1 << 2)#define ATMEL_SPI_SR_OVRES (1 << 3)#define ATMEL_SPI_SR_ENDRX (1 << 4)#define ATMEL_SPI_SR_ENDTX (1 << 5)#define ATMEL_SPI_SR_RXBUFF (1 << 6)#define ATMEL_SPI_SR_TXBUFE (1 << 7)#define ATMEL_SPI_SR_NSSR (1 << 8)#define ATMEL_SPI_SR_TXEMPTY (1 << 9)#define ATMEL_SPI_SR_SPIENS (1 << 16)/* Bits in CSRx */#define ATMEL_SPI_CSRx_CPOL (1 << 0)#define ATMEL_SPI_CSRx_NCPHA (1 << 1)#define ATMEL_SPI_CSRx_CSAAT (1 << 3)#define ATMEL_SPI_CSRx_BITS(x) ((x) << 4)#define ATMEL_SPI_CSRx_SCBR(x) ((x) << 8)#define ATMEL_SPI_CSRx_SCBR_MAX 0xff#define ATMEL_SPI_CSRx_DLYBS(x) ((x) << 16)#define ATMEL_SPI_CSRx_DLYBCT(x) ((x) << 24)/* Bits in VERSION */#define ATMEL_SPI_VERSION_REV(x) ((x) << 0)#define ATMEL_SPI_VERSION_MFN(x) ((x) << 16)/* Constants for CSRx:BITS */#define ATMEL_SPI_BITS_8 0#define ATMEL_SPI_BITS_9 1#define ATMEL_SPI_BITS_10 2#define ATMEL_SPI_BITS_11 3#define ATMEL_SPI_BITS_12 4#define ATMEL_SPI_BITS_13 5#define ATMEL_SPI_BITS_14 6#define ATMEL_SPI_BITS_15 7#define ATMEL_SPI_BITS_16 8struct atmel_spi_slave { struct spi_slave slave; void *regs; u32 mr;};static inline struct atmel_spi_slave *to_atmel_spi(struct spi_slave *slave){ return container_of(slave, struct atmel_spi_slave, slave);}/* Register access macros */#define spi_readl(as, reg) \ readl(as->regs + ATMEL_SPI_##reg)#define spi_writel(as, reg, value) \ writel(value, as->regs + ATMEL_SPI_##reg)⌨️ 快捷键说明
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