1 /* 2 * Register definitions for the Atmel AT32/AT91 SPI Controller 3 */ 4 5 /* Register offsets */ 6 #define ATMEL_SPI_CR 0x0000 7 #define ATMEL_SPI_MR 0x0004 8 #define ATMEL_SPI_RDR 0x0008 9 #define ATMEL_SPI_TDR 0x000c 10 #define ATMEL_SPI_SR 0x0010 11 #define ATMEL_SPI_IER 0x0014 12 #define ATMEL_SPI_IDR 0x0018 13 #define ATMEL_SPI_IMR 0x001c 14 #define ATMEL_SPI_CSR(x) (0x0030 + 4 * (x)) 15 #define ATMEL_SPI_VERSION 0x00fc 16 17 /* Bits in CR */ 18 #define ATMEL_SPI_CR_SPIEN BIT(0) 19 #define ATMEL_SPI_CR_SPIDIS BIT(1) 20 #define ATMEL_SPI_CR_SWRST BIT(7) 21 #define ATMEL_SPI_CR_LASTXFER BIT(24) 22 23 /* Bits in MR */ 24 #define ATMEL_SPI_MR_MSTR BIT(0) 25 #define ATMEL_SPI_MR_PS BIT(1) 26 #define ATMEL_SPI_MR_PCSDEC BIT(2) 27 #define ATMEL_SPI_MR_FDIV BIT(3) 28 #define ATMEL_SPI_MR_MODFDIS BIT(4) 29 #define ATMEL_SPI_MR_WDRBT BIT(5) 30 #define ATMEL_SPI_MR_LLB BIT(7) 31 #define ATMEL_SPI_MR_PCS(x) (((x) & 15) << 16) 32 #define ATMEL_SPI_MR_DLYBCS(x) ((x) << 24) 33 34 /* Bits in RDR */ 35 #define ATMEL_SPI_RDR_RD(x) (x) 36 #define ATMEL_SPI_RDR_PCS(x) ((x) << 16) 37 38 /* Bits in TDR */ 39 #define ATMEL_SPI_TDR_TD(x) (x) 40 #define ATMEL_SPI_TDR_PCS(x) ((x) << 16) 41 #define ATMEL_SPI_TDR_LASTXFER BIT(24) 42 43 /* Bits in SR/IER/IDR/IMR */ 44 #define ATMEL_SPI_SR_RDRF BIT(0) 45 #define ATMEL_SPI_SR_TDRE BIT(1) 46 #define ATMEL_SPI_SR_MODF BIT(2) 47 #define ATMEL_SPI_SR_OVRES BIT(3) 48 #define ATMEL_SPI_SR_ENDRX BIT(4) 49 #define ATMEL_SPI_SR_ENDTX BIT(5) 50 #define ATMEL_SPI_SR_RXBUFF BIT(6) 51 #define ATMEL_SPI_SR_TXBUFE BIT(7) 52 #define ATMEL_SPI_SR_NSSR BIT(8) 53 #define ATMEL_SPI_SR_TXEMPTY BIT(9) 54 #define ATMEL_SPI_SR_SPIENS BIT(16) 55 56 /* Bits in CSRx */ 57 #define ATMEL_SPI_CSRx_CPOL BIT(0) 58 #define ATMEL_SPI_CSRx_NCPHA BIT(1) 59 #define ATMEL_SPI_CSRx_CSAAT BIT(3) 60 #define ATMEL_SPI_CSRx_BITS(x) ((x) << 4) 61 #define ATMEL_SPI_CSRx_SCBR(x) ((x) << 8) 62 #define ATMEL_SPI_CSRx_SCBR_MAX GENMASK(7, 0) 63 #define ATMEL_SPI_CSRx_DLYBS(x) ((x) << 16) 64 #define ATMEL_SPI_CSRx_DLYBCT(x) ((x) << 24) 65 66 /* Bits in VERSION */ 67 #define ATMEL_SPI_VERSION_REV(x) ((x) & 0xfff) 68 #define ATMEL_SPI_VERSION_MFN(x) ((x) << 16) 69 70 /* Constants for CSRx:BITS */ 71 #define ATMEL_SPI_BITS_8 0 72 #define ATMEL_SPI_BITS_9 1 73 #define ATMEL_SPI_BITS_10 2 74 #define ATMEL_SPI_BITS_11 3 75 #define ATMEL_SPI_BITS_12 4 76 #define ATMEL_SPI_BITS_13 5 77 #define ATMEL_SPI_BITS_14 6 78 #define ATMEL_SPI_BITS_15 7 79 #define ATMEL_SPI_BITS_16 8 80 81 struct atmel_spi_slave { 82 struct spi_slave slave; 83 void *regs; 84 u32 mr; 85 }; 86 87 static inline struct atmel_spi_slave *to_atmel_spi(struct spi_slave *slave) 88 { 89 return container_of(slave, struct atmel_spi_slave, slave); 90 } 91 92 /* Register access macros */ 93 #define spi_readl(as, reg) \ 94 readl(as->regs + ATMEL_SPI_##reg) 95 #define spi_writel(as, reg, value) \ 96 writel(value, as->regs + ATMEL_SPI_##reg) 97 98 #if !defined(CONFIG_SYS_SPI_WRITE_TOUT) 99 #define CONFIG_SYS_SPI_WRITE_TOUT (5 * CONFIG_SYS_HZ) 100 #endif 101