drivers/spi/davinci_spi.h

   1 /*
   2  * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
   3  *
   4  * Register definitions for the DaVinci SPI Controller
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #ifndef _DAVINCI_SPI_H_
  10 #define _DAVINCI_SPI_H_
  11
  12 struct davinci_spi_regs {
  13         dv_reg  gcr0;           /* 0x00 */
  14         dv_reg  gcr1;           /* 0x04 */
  15         dv_reg  int0;           /* 0x08 */
  16         dv_reg  lvl;            /* 0x0c */
  17         dv_reg  flg;            /* 0x10 */
  18         dv_reg  pc0;            /* 0x14 */
  19         dv_reg  pc1;            /* 0x18 */
  20         dv_reg  pc2;            /* 0x1c */
  21         dv_reg  pc3;            /* 0x20 */
  22         dv_reg  pc4;            /* 0x24 */
  23         dv_reg  pc5;            /* 0x28 */
  24         dv_reg  rsvd[3];
  25         dv_reg  dat0;           /* 0x38 */
  26         dv_reg  dat1;           /* 0x3c */
  27         dv_reg  buf;            /* 0x40 */
  28         dv_reg  emu;            /* 0x44 */
  29         dv_reg  delay;          /* 0x48 */
  30         dv_reg  def;            /* 0x4c */
  31         dv_reg  fmt0;           /* 0x50 */
  32         dv_reg  fmt1;           /* 0x54 */
  33         dv_reg  fmt2;           /* 0x58 */
  34         dv_reg  fmt3;           /* 0x5c */
  35         dv_reg  intvec0;        /* 0x60 */
  36         dv_reg  intvec1;        /* 0x64 */
  37 };
  38
  39 #define BIT(x)                  (1 << (x))
  40
  41 /* SPIGCR0 */
  42 #define SPIGCR0_SPIENA_MASK     0x1
  43 #define SPIGCR0_SPIRST_MASK     0x0
  44
  45 /* SPIGCR0 */
  46 #define SPIGCR1_CLKMOD_MASK     BIT(1)
  47 #define SPIGCR1_MASTER_MASK     BIT(0)
  48 #define SPIGCR1_SPIENA_MASK     BIT(24)
  49
  50 /* SPIPC0 */
  51 #define SPIPC0_DIFUN_MASK       BIT(11)         /* SIMO */
  52 #define SPIPC0_DOFUN_MASK       BIT(10)         /* SOMI */
  53 #define SPIPC0_CLKFUN_MASK      BIT(9)          /* CLK */
  54 #define SPIPC0_EN0FUN_MASK      BIT(0)
  55
  56 /* SPIFMT0 */
  57 #define SPIFMT_SHIFTDIR_SHIFT   20
  58 #define SPIFMT_POLARITY_SHIFT   17
  59 #define SPIFMT_PHASE_SHIFT      16
  60 #define SPIFMT_PRESCALE_SHIFT   8
  61
  62 /* SPIDAT1 */
  63 #define SPIDAT1_CSHOLD_SHIFT    28
  64 #define SPIDAT1_CSNR_SHIFT      16
  65
  66 /* SPIDELAY */
  67 #define SPI_C2TDELAY_SHIFT      24
  68 #define SPI_T2CDELAY_SHIFT      16
  69
  70 /* SPIBUF */
  71 #define SPIBUF_RXEMPTY_MASK     BIT(31)
  72 #define SPIBUF_TXFULL_MASK      BIT(29)
  73
  74 /* SPIDEF */
  75 #define SPIDEF_CSDEF0_MASK      BIT(0)
  76
  77 #define SPI0_BUS                0
  78 #define SPI0_BASE               CONFIG_SYS_SPI_BASE
  79 /*
  80  * Define default SPI0_NUM_CS as 1 for existing platforms that uses this
  81  * driver. Platform can configure number of CS using CONFIG_SYS_SPI0_NUM_CS
  82  * if more than one CS is supported and by defining CONFIG_SYS_SPI0.
  83  */
  84 #ifndef CONFIG_SYS_SPI0
  85 #define SPI0_NUM_CS             1
  86 #else
  87 #define SPI0_NUM_CS             CONFIG_SYS_SPI0_NUM_CS
  88 #endif
  89
  90 /*
  91  * define CONFIG_SYS_SPI1 when platform has spi-1 device (bus #1) and
  92  * CONFIG_SYS_SPI1_NUM_CS defines number of CS on this bus
  93  */
  94 #ifdef CONFIG_SYS_SPI1
  95 #define SPI1_BUS                1
  96 #define SPI1_NUM_CS             CONFIG_SYS_SPI1_NUM_CS
  97 #define SPI1_BASE               CONFIG_SYS_SPI1_BASE
  98 #endif
  99
 100 /*
 101  * define CONFIG_SYS_SPI2 when platform has spi-2 device (bus #2) and
 102  * CONFIG_SYS_SPI2_NUM_CS defines number of CS on this bus
 103  */
 104 #ifdef CONFIG_SYS_SPI2
 105 #define SPI2_BUS                2
 106 #define SPI2_NUM_CS             CONFIG_SYS_SPI2_NUM_CS
 107 #define SPI2_BASE               CONFIG_SYS_SPI2_BASE
 108 #endif
 109
 110 struct davinci_spi_slave {
 111         struct spi_slave slave;
 112         struct davinci_spi_regs *regs;
 113         unsigned int freq;
 114 };
 115
 116 static inline struct davinci_spi_slave *to_davinci_spi(struct spi_slave *slave)
 117 {
 118         return container_of(slave, struct davinci_spi_slave, slave);
 119 }
 120
 121 #endif /* _DAVINCI_SPI_H_ */