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