drivers/spi/atmel_spi.h

   1 /*
   2  * Register definitions for Atmel Serial Peripheral Interface (SPI)
   3  *
   4  * Copyright (C) 2006 Atmel Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #ifndef __ATMEL_SPI_H__
  11 #define __ATMEL_SPI_H__
  12
  13 /* SPI register offsets */
  14 #define SPI_CR                                  0x0000
  15 #define SPI_MR                                  0x0004
  16 #define SPI_RDR                                 0x0008
  17 #define SPI_TDR                                 0x000c
  18 #define SPI_SR                                  0x0010
  19 #define SPI_IER                                 0x0014
  20 #define SPI_IDR                                 0x0018
  21 #define SPI_IMR                                 0x001c
  22 #define SPI_CSR0                                0x0030
  23 #define SPI_CSR1                                0x0034
  24 #define SPI_CSR2                                0x0038
  25 #define SPI_CSR3                                0x003c
  26 #define SPI_RPR                                 0x0100
  27 #define SPI_RCR                                 0x0104
  28 #define SPI_TPR                                 0x0108
  29 #define SPI_TCR                                 0x010c
  30 #define SPI_RNPR                                0x0110
  31 #define SPI_RNCR                                0x0114
  32 #define SPI_TNPR                                0x0118
  33 #define SPI_TNCR                                0x011c
  34 #define SPI_PTCR                                0x0120
  35 #define SPI_PTSR                                0x0124
  36
  37 /* Bitfields in CR */
  38 #define SPI_SPIEN_OFFSET                        0
  39 #define SPI_SPIEN_SIZE                          1
  40 #define SPI_SPIDIS_OFFSET                       1
  41 #define SPI_SPIDIS_SIZE                         1
  42 #define SPI_SWRST_OFFSET                        7
  43 #define SPI_SWRST_SIZE                          1
  44 #define SPI_LASTXFER_OFFSET                     24
  45 #define SPI_LASTXFER_SIZE                       1
  46
  47 /* Bitfields in MR */
  48 #define SPI_MSTR_OFFSET                         0
  49 #define SPI_MSTR_SIZE                           1
  50 #define SPI_PS_OFFSET                           1
  51 #define SPI_PS_SIZE                             1
  52 #define SPI_PCSDEC_OFFSET                       2
  53 #define SPI_PCSDEC_SIZE                         1
  54 #define SPI_FDIV_OFFSET                         3
  55 #define SPI_FDIV_SIZE                           1
  56 #define SPI_MODFDIS_OFFSET                      4
  57 #define SPI_MODFDIS_SIZE                        1
  58 #define SPI_LLB_OFFSET                          7
  59 #define SPI_LLB_SIZE                            1
  60 #define SPI_PCS_OFFSET                          16
  61 #define SPI_PCS_SIZE                            4
  62 #define SPI_DLYBCS_OFFSET                       24
  63 #define SPI_DLYBCS_SIZE                         8
  64
  65 /* Bitfields in RDR */
  66 #define SPI_RD_OFFSET                           0
  67 #define SPI_RD_SIZE                             16
  68
  69 /* Bitfields in TDR */
  70 #define SPI_TD_OFFSET                           0
  71 #define SPI_TD_SIZE                             16
  72
  73 /* Bitfields in SR */
  74 #define SPI_RDRF_OFFSET                         0
  75 #define SPI_RDRF_SIZE                           1
  76 #define SPI_TDRE_OFFSET                         1
  77 #define SPI_TDRE_SIZE                           1
  78 #define SPI_MODF_OFFSET                         2
  79 #define SPI_MODF_SIZE                           1
  80 #define SPI_OVRES_OFFSET                        3
  81 #define SPI_OVRES_SIZE                          1
  82 #define SPI_ENDRX_OFFSET                        4
  83 #define SPI_ENDRX_SIZE                          1
  84 #define SPI_ENDTX_OFFSET                        5
  85 #define SPI_ENDTX_SIZE                          1
  86 #define SPI_RXBUFF_OFFSET                       6
  87 #define SPI_RXBUFF_SIZE                         1
  88 #define SPI_TXBUFE_OFFSET                       7
  89 #define SPI_TXBUFE_SIZE                         1
  90 #define SPI_NSSR_OFFSET                         8
  91 #define SPI_NSSR_SIZE                           1
  92 #define SPI_TXEMPTY_OFFSET                      9
  93 #define SPI_TXEMPTY_SIZE                        1
  94 #define SPI_SPIENS_OFFSET                       16
  95 #define SPI_SPIENS_SIZE                         1
  96
  97 /* Bitfields in CSR0 */
  98 #define SPI_CPOL_OFFSET                         0
  99 #define SPI_CPOL_SIZE                           1
 100 #define SPI_NCPHA_OFFSET                        1
 101 #define SPI_NCPHA_SIZE                          1
 102 #define SPI_CSAAT_OFFSET                        3
 103 #define SPI_CSAAT_SIZE                          1
 104 #define SPI_BITS_OFFSET                         4
 105 #define SPI_BITS_SIZE                           4
 106 #define SPI_SCBR_OFFSET                         8
 107 #define SPI_SCBR_SIZE                           8
 108 #define SPI_DLYBS_OFFSET                        16
 109 #define SPI_DLYBS_SIZE                          8
 110 #define SPI_DLYBCT_OFFSET                       24
 111 #define SPI_DLYBCT_SIZE                         8
 112
 113 /* Bitfields in RCR */
 114 #define SPI_RXCTR_OFFSET                        0
 115 #define SPI_RXCTR_SIZE                          16
 116
 117 /* Bitfields in TCR */
 118 #define SPI_TXCTR_OFFSET                        0
 119 #define SPI_TXCTR_SIZE                          16
 120
 121 /* Bitfields in RNCR */
 122 #define SPI_RXNCR_OFFSET                        0
 123 #define SPI_RXNCR_SIZE                          16
 124
 125 /* Bitfields in TNCR */
 126 #define SPI_TXNCR_OFFSET                        0
 127 #define SPI_TXNCR_SIZE                          16
 128
 129 /* Bitfields in PTCR */
 130 #define SPI_RXTEN_OFFSET                        0
 131 #define SPI_RXTEN_SIZE                          1
 132 #define SPI_RXTDIS_OFFSET                       1
 133 #define SPI_RXTDIS_SIZE                         1
 134 #define SPI_TXTEN_OFFSET                        8
 135 #define SPI_TXTEN_SIZE                          1
 136 #define SPI_TXTDIS_OFFSET                       9
 137 #define SPI_TXTDIS_SIZE                         1
 138
 139 /* Constants for BITS */
 140 #define SPI_BITS_8_BPT                          0
 141 #define SPI_BITS_9_BPT                          1
 142 #define SPI_BITS_10_BPT                         2
 143 #define SPI_BITS_11_BPT                         3
 144 #define SPI_BITS_12_BPT                         4
 145 #define SPI_BITS_13_BPT                         5
 146 #define SPI_BITS_14_BPT                         6
 147 #define SPI_BITS_15_BPT                         7
 148 #define SPI_BITS_16_BPT                         8
 149
 150 /* Bit manipulation macros */
 151 #define SPI_BIT(name) \
 152         (1 << SPI_##name##_OFFSET)
 153 #define SPI_BF(name,value) \
 154         (((value) & ((1 << SPI_##name##_SIZE) - 1)) << SPI_##name##_OFFSET)
 155 #define SPI_BFEXT(name,value) \
 156         (((value) >> SPI_##name##_OFFSET) & ((1 << SPI_##name##_SIZE) - 1))
 157 #define SPI_BFINS(name,value,old) \
 158         ( ((old) & ~(((1 << SPI_##name##_SIZE) - 1) << SPI_##name##_OFFSET)) \
 159           | SPI_BF(name,value))
 160
 161 /* Register access macros */
 162 #define spi_readl(port,reg) \
 163         __raw_readl((port)->regs + SPI_##reg)
 164 #define spi_writel(port,reg,value) \
 165         __raw_writel((value), (port)->regs + SPI_##reg)
 166
 167 #endif /* __ATMEL_SPI_H__ */