1 | /*===============================================================*\ |
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2 | | Project: RTEMS support for MPC83xx | |
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3 | +-----------------------------------------------------------------+ |
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4 | | Copyright (c) 2007 | |
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5 | | Embedded Brains GmbH | |
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6 | | Obere Lagerstr. 30 | |
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7 | | D-82178 Puchheim | |
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8 | | Germany | |
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9 | | rtems@embedded-brains.de | |
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10 | +-----------------------------------------------------------------+ |
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11 | | The license and distribution terms for this file may be | |
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12 | | found in the file LICENSE in this distribution or at | |
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13 | | | |
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14 | | http://www.rtems.org/license/LICENSE. | |
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15 | | | |
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16 | +-----------------------------------------------------------------+ |
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17 | | this file contains the MPC83xx SPI driver declarations | |
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18 | | NOTE: this driver has the same API as a I2C driver | |
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19 | \*===============================================================*/ |
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20 | #ifndef _MPC83XX_SPIDRV_H |
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21 | #define _MPC83XX_SPIDRV_H |
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22 | |
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23 | #include <mpc83xx/mpc83xx.h> |
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24 | #include <rtems/libi2c.h> |
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25 | #include <rtems/irq.h> |
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26 | |
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27 | #ifdef __cplusplus |
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28 | extern "C" { |
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29 | #endif |
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30 | |
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31 | typedef struct mpc83xx_spi_softc { |
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32 | m83xxSPIRegisters_t *reg_ptr; |
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33 | int initialized; |
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34 | rtems_irq_number irq_number; |
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35 | uint32_t base_frq; /* input frq for baud rate divider */ |
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36 | rtems_id irq_sema_id; |
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37 | uint32_t curr_addr; /* current spi address */ |
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38 | uint32_t idle_char; |
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39 | uint8_t bytes_per_char; |
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40 | uint8_t bit_shift; |
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41 | } mpc83xx_spi_softc_t ; |
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42 | |
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43 | typedef struct { |
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44 | rtems_libi2c_bus_t bus_desc; |
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45 | mpc83xx_spi_softc_t softc; |
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46 | } mpc83xx_spi_desc_t; |
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47 | |
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48 | /*=========================================================================*\ |
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49 | | Function: | |
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50 | \*-------------------------------------------------------------------------*/ |
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51 | rtems_status_code mpc83xx_spi_init |
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52 | ( |
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53 | /*-------------------------------------------------------------------------*\ |
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54 | | Purpose: | |
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55 | | initialize the driver | |
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56 | +---------------------------------------------------------------------------+ |
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57 | | Input Parameters: | |
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58 | \*-------------------------------------------------------------------------*/ |
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59 | rtems_libi2c_bus_t *bh /* bus specifier structure */ |
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60 | ); |
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61 | /*-------------------------------------------------------------------------*\ |
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62 | | Return Value: | |
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63 | | o = ok or error code | |
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64 | \*=========================================================================*/ |
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65 | |
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66 | /*=========================================================================*\ |
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67 | | Function: | |
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68 | \*-------------------------------------------------------------------------*/ |
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69 | int mpc83xx_spi_read_write_bytes |
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70 | ( |
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71 | /*-------------------------------------------------------------------------*\ |
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72 | | Purpose: | |
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73 | | transmit/receive some bytes from SPI device | |
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74 | +---------------------------------------------------------------------------+ |
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75 | | Input Parameters: | |
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76 | \*-------------------------------------------------------------------------*/ |
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77 | rtems_libi2c_bus_t *bh, /* bus specifier structure */ |
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78 | unsigned char *rbuf, /* buffer to store bytes */ |
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79 | const unsigned char *tbuf, /* buffer to send bytes */ |
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80 | int len /* number of bytes to transceive */ |
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81 | ); |
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82 | /*-------------------------------------------------------------------------*\ |
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83 | | Return Value: | |
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84 | | number of bytes received or (negative) error code | |
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85 | \*=========================================================================*/ |
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86 | |
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87 | /*=========================================================================*\ |
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88 | | Function: | |
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89 | \*-------------------------------------------------------------------------*/ |
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90 | int mpc83xx_spi_read_bytes |
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91 | ( |
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92 | /*-------------------------------------------------------------------------*\ |
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93 | | Purpose: | |
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94 | | receive some bytes from SPI device | |
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95 | +---------------------------------------------------------------------------+ |
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96 | | Input Parameters: | |
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97 | \*-------------------------------------------------------------------------*/ |
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98 | rtems_libi2c_bus_t *bh, /* bus specifier structure */ |
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99 | unsigned char *buf, /* buffer to store bytes */ |
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100 | int len /* number of bytes to receive */ |
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101 | ); |
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102 | /*-------------------------------------------------------------------------*\ |
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103 | | Return Value: | |
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104 | | number of bytes received or (negative) error code | |
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105 | \*=========================================================================*/ |
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106 | |
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107 | /*=========================================================================*\ |
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108 | | Function: | |
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109 | \*-------------------------------------------------------------------------*/ |
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110 | int mpc83xx_spi_write_bytes |
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111 | ( |
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112 | /*-------------------------------------------------------------------------*\ |
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113 | | Purpose: | |
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114 | | send some bytes to SPI device | |
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115 | +---------------------------------------------------------------------------+ |
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116 | | Input Parameters: | |
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117 | \*-------------------------------------------------------------------------*/ |
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118 | rtems_libi2c_bus_t *bh, /* bus specifier structure */ |
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119 | unsigned char *buf, /* buffer to send */ |
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120 | int len /* number of bytes to send */ |
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121 | |
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122 | ); |
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123 | /*-------------------------------------------------------------------------*\ |
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124 | | Return Value: | |
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125 | | number of bytes sent or (negative) error code | |
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126 | \*=========================================================================*/ |
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127 | |
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128 | /*=========================================================================*\ |
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129 | | Function: | |
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130 | \*-------------------------------------------------------------------------*/ |
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131 | rtems_status_code mpc83xx_spi_set_tfr_mode |
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132 | ( |
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133 | /*-------------------------------------------------------------------------*\ |
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134 | | Purpose: | |
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135 | | set SPI to desired baudrate/clock mode/character mode | |
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136 | +---------------------------------------------------------------------------+ |
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137 | | Input Parameters: | |
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138 | \*-------------------------------------------------------------------------*/ |
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139 | rtems_libi2c_bus_t *bh, /* bus specifier structure */ |
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140 | const rtems_libi2c_tfr_mode_t *tfr_mode /* transfer mode info */ |
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141 | ); |
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142 | /*-------------------------------------------------------------------------*\ |
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143 | | Return Value: | |
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144 | | rtems_status_code | |
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145 | \*=========================================================================*/ |
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146 | |
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147 | /*=========================================================================*\ |
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148 | | Function: | |
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149 | \*-------------------------------------------------------------------------*/ |
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150 | int mpc83xx_spi_ioctl |
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151 | ( |
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152 | /*-------------------------------------------------------------------------*\ |
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153 | | Purpose: | |
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154 | | perform selected ioctl function for SPI | |
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155 | +---------------------------------------------------------------------------+ |
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156 | | Input Parameters: | |
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157 | \*-------------------------------------------------------------------------*/ |
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158 | rtems_libi2c_bus_t *bh, /* bus specifier structure */ |
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159 | int cmd, /* ioctl command code */ |
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160 | void *arg /* additional argument array */ |
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161 | ); |
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162 | /*-------------------------------------------------------------------------*\ |
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163 | | Return Value: | |
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164 | | rtems_status_code | |
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165 | \*=========================================================================*/ |
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166 | |
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167 | #ifdef __cplusplus |
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168 | } |
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169 | #endif |
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170 | |
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171 | |
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172 | #endif /* _MPC83XX_I2CDRV_H */ |
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