| Hans-Christian Egtvedt | 9b4381b | 2008-05-16 11:10:32 +0200 | [diff] [blame^] | 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 (1 << 0) |
| 19 | #define ATMEL_SPI_CR_SPIDIS (1 << 1) |
| 20 | #define ATMEL_SPI_CR_SWRST (1 << 7) |
| 21 | #define ATMEL_SPI_CR_LASTXFER (1 << 24) |
| 22 | |
| 23 | /* Bits in MR */ |
| 24 | #define ATMEL_SPI_MR_MSTR (1 << 0) |
| 25 | #define ATMEL_SPI_MR_PS (1 << 1) |
| 26 | #define ATMEL_SPI_MR_PCSDEC (1 << 2) |
| 27 | #define ATMEL_SPI_MR_FDIV (1 << 3) |
| 28 | #define ATMEL_SPI_MR_MODFDIS (1 << 4) |
| 29 | #define ATMEL_SPI_MR_LLB (1 << 7) |
| 30 | #define ATMEL_SPI_MR_PCS(x) (((x) & 15) << 16) |
| 31 | #define ATMEL_SPI_MR_DLYBCS(x) ((x) << 24) |
| 32 | |
| 33 | /* Bits in RDR */ |
| 34 | #define ATMEL_SPI_RDR_RD(x) (x) |
| 35 | #define ATMEL_SPI_RDR_PCS(x) ((x) << 16) |
| 36 | |
| 37 | /* Bits in TDR */ |
| 38 | #define ATMEL_SPI_TDR_TD(x) (x) |
| 39 | #define ATMEL_SPI_TDR_PCS(x) ((x) << 16) |
| 40 | #define ATMEL_SPI_TDR_LASTXFER (1 << 24) |
| 41 | |
| 42 | /* Bits in SR/IER/IDR/IMR */ |
| 43 | #define ATMEL_SPI_SR_RDRF (1 << 0) |
| 44 | #define ATMEL_SPI_SR_TDRE (1 << 1) |
| 45 | #define ATMEL_SPI_SR_MODF (1 << 2) |
| 46 | #define ATMEL_SPI_SR_OVRES (1 << 3) |
| 47 | #define ATMEL_SPI_SR_ENDRX (1 << 4) |
| 48 | #define ATMEL_SPI_SR_ENDTX (1 << 5) |
| 49 | #define ATMEL_SPI_SR_RXBUFF (1 << 6) |
| 50 | #define ATMEL_SPI_SR_TXBUFE (1 << 7) |
| 51 | #define ATMEL_SPI_SR_NSSR (1 << 8) |
| 52 | #define ATMEL_SPI_SR_TXEMPTY (1 << 9) |
| 53 | #define ATMEL_SPI_SR_SPIENS (1 << 16) |
| 54 | |
| 55 | /* Bits in CSRx */ |
| 56 | #define ATMEL_SPI_CSRx_CPOL (1 << 0) |
| 57 | #define ATMEL_SPI_CSRx_NCPHA (1 << 1) |
| 58 | #define ATMEL_SPI_CSRx_CSAAT (1 << 3) |
| 59 | #define ATMEL_SPI_CSRx_BITS(x) ((x) << 4) |
| 60 | #define ATMEL_SPI_CSRx_SCBR(x) ((x) << 8) |
| 61 | #define ATMEL_SPI_CSRx_SCBR_MAX 0xff |
| 62 | #define ATMEL_SPI_CSRx_DLYBS(x) ((x) << 16) |
| 63 | #define ATMEL_SPI_CSRx_DLYBCT(x) ((x) << 24) |
| 64 | |
| 65 | /* Bits in VERSION */ |
| 66 | #define ATMEL_SPI_VERSION_REV(x) ((x) << 0) |
| 67 | #define ATMEL_SPI_VERSION_MFN(x) ((x) << 16) |
| 68 | |
| 69 | /* Constants for CSRx:BITS */ |
| 70 | #define ATMEL_SPI_BITS_8 0 |
| 71 | #define ATMEL_SPI_BITS_9 1 |
| 72 | #define ATMEL_SPI_BITS_10 2 |
| 73 | #define ATMEL_SPI_BITS_11 3 |
| 74 | #define ATMEL_SPI_BITS_12 4 |
| 75 | #define ATMEL_SPI_BITS_13 5 |
| 76 | #define ATMEL_SPI_BITS_14 6 |
| 77 | #define ATMEL_SPI_BITS_15 7 |
| 78 | #define ATMEL_SPI_BITS_16 8 |
| 79 | |
| 80 | struct atmel_spi_slave { |
| 81 | struct spi_slave slave; |
| 82 | void *regs; |
| 83 | u32 mr; |
| 84 | }; |
| 85 | |
| 86 | static inline struct atmel_spi_slave *to_atmel_spi(struct spi_slave *slave) |
| 87 | { |
| 88 | return container_of(slave, struct atmel_spi_slave, slave); |
| 89 | } |
| 90 | |
| 91 | /* Register access macros */ |
| 92 | #define spi_readl(as, reg) \ |
| 93 | readl(as->regs + ATMEL_SPI_##reg) |
| 94 | #define spi_writel(as, reg, value) \ |
| 95 | writel(value, as->regs + ATMEL_SPI_##reg) |