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.com/license/LICENSE. | |
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15 | | | |
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16 | +-----------------------------------------------------------------+ |
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17 | | this file contains the low level MPC83xx SPI driver parameters | |
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18 | | and board-specific functions | |
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19 | \*===============================================================*/ |
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20 | #include <mpc83xx/mpc83xx_spidrv.h> |
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21 | #include <bsp/irq.h> |
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22 | #include <bsp.h> |
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23 | |
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24 | #if defined( MPC8313ERDB) |
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25 | |
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26 | #include <libchip/spi-sd-card.h> |
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27 | |
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28 | #elif defined( MPC8349EAMDS) |
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29 | |
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30 | #include <libchip/spi-flash-m25p40.h> |
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31 | |
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32 | #elif defined( HSC_CM01) |
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33 | |
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34 | #include <libchip/spi-fram-fm25l256.h> |
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35 | |
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36 | #else |
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37 | |
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38 | #warning No SPI configuration available |
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39 | |
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40 | #endif |
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41 | |
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42 | /*=========================================================================*\ |
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43 | | Board-specific adaptation functions | |
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44 | \*=========================================================================*/ |
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45 | |
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46 | /*=========================================================================*\ |
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47 | | Function: | |
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48 | \*-------------------------------------------------------------------------*/ |
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49 | static rtems_status_code bsp_spi_sel_addr |
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50 | ( |
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51 | /*-------------------------------------------------------------------------*\ |
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52 | | Purpose: | |
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53 | | address a slave device on the bus | |
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54 | +---------------------------------------------------------------------------+ |
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55 | | Input Parameters: | |
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56 | \*-------------------------------------------------------------------------*/ |
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57 | rtems_libi2c_bus_t *bh, /* bus specifier structure */ |
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58 | uint32_t addr, /* address to send on bus */ |
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59 | int rw /* 0=write,1=read */ |
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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 | #if defined( MPC8313ERDB) |
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68 | |
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69 | /* Check address */ |
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70 | if (addr > 0) { |
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71 | return RTEMS_INVALID_NUMBER; |
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72 | } |
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73 | |
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74 | /* SCS (active low) */ |
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75 | mpc83xx.gpio [0].gpdat &= ~0x20000000; |
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76 | |
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77 | #elif defined( MPC8349EAMDS) |
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78 | |
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79 | /* |
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80 | * check device address for valid range |
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81 | */ |
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82 | if (addr > 0) { |
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83 | return RTEMS_INVALID_NUMBER; |
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84 | } |
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85 | /* |
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86 | * select given device |
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87 | * GPIO1[0] is nSEL_SPI for M25P40 |
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88 | * set it to be active/low |
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89 | */ |
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90 | mpc83xx.gpio[0].gpdat &= ~(1 << (31- 0)); |
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91 | |
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92 | #elif defined( HSC_CM01) |
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93 | |
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94 | /* |
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95 | * check device address for valid range |
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96 | */ |
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97 | if (addr > 7) { |
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98 | return RTEMS_INVALID_NUMBER; |
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99 | } |
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100 | /* |
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101 | * select given device |
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102 | */ |
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103 | /* |
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104 | * GPIO1[24] is SPI_A0 |
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105 | * GPIO1[25] is SPI_A1 |
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106 | * GPIO1[26] is SPI_A2 |
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107 | * set pins to address |
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108 | */ |
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109 | mpc83xx.gpio[0].gpdat = |
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110 | (mpc83xx.gpio[0].gpdat & ~(0x7 << (31-26))) |
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111 | | (addr << (31-26)); |
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112 | /* |
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113 | * GPIO1[27] is high-active strobe |
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114 | */ |
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115 | mpc83xx.gpio[0].gpdat |= (1 << (31- 27)); |
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116 | |
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117 | #endif |
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118 | |
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119 | return RTEMS_SUCCESSFUL; |
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120 | } |
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121 | |
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122 | /*=========================================================================*\ |
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123 | | Function: | |
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124 | \*-------------------------------------------------------------------------*/ |
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125 | static rtems_status_code bsp_spi_send_start_dummy |
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126 | ( |
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127 | /*-------------------------------------------------------------------------*\ |
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128 | | Purpose: | |
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129 | | dummy function, SPI has no start condition | |
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130 | +---------------------------------------------------------------------------+ |
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131 | | Input Parameters: | |
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132 | \*-------------------------------------------------------------------------*/ |
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133 | rtems_libi2c_bus_t *bh /* bus specifier structure */ |
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134 | ) |
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135 | /*-------------------------------------------------------------------------*\ |
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136 | | Return Value: | |
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137 | | o = ok or error code | |
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138 | \*=========================================================================*/ |
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139 | { |
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140 | |
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141 | #if defined( MPC8313ERDB) |
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142 | |
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143 | /* SCS (inactive high) */ |
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144 | mpc83xx.gpio [0].gpdat |= 0x20000000; |
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145 | |
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146 | #elif defined( MPC8349EAMDS) |
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147 | |
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148 | /* |
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149 | * GPIO1[0] is nSEL_SPI for M25P40 |
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150 | * set it to inactive/high |
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151 | */ |
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152 | mpc83xx.gpio[0].gpdat |= (1 << (31- 0)); |
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153 | |
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154 | #elif defined( HSC_CM01) |
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155 | |
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156 | /* |
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157 | * GPIO1[27] is high-active strobe |
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158 | * set it to inactive/ low |
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159 | */ |
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160 | mpc83xx.gpio[0].gpdat &= ~(0x1 << (31-27)); |
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161 | |
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162 | #endif |
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163 | |
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164 | return 0; |
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165 | } |
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166 | |
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167 | /*=========================================================================*\ |
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168 | | Function: | |
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169 | \*-------------------------------------------------------------------------*/ |
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170 | static rtems_status_code bsp_spi_send_stop |
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171 | ( |
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172 | /*-------------------------------------------------------------------------*\ |
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173 | | Purpose: | |
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174 | | deselect SPI | |
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175 | +---------------------------------------------------------------------------+ |
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176 | | Input Parameters: | |
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177 | \*-------------------------------------------------------------------------*/ |
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178 | rtems_libi2c_bus_t *bh /* bus specifier structure */ |
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179 | ) |
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180 | /*-------------------------------------------------------------------------*\ |
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181 | | Return Value: | |
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182 | | o = ok or error code | |
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183 | \*=========================================================================*/ |
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184 | { |
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185 | #if defined(DEBUG) |
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186 | printk("bsp_spi_send_stop called... "); |
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187 | #endif |
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188 | |
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189 | #if defined( MPC8313ERDB) |
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190 | |
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191 | /* SCS (inactive high) */ |
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192 | mpc83xx.gpio [0].gpdat |= 0x20000000; |
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193 | |
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194 | #elif defined( MPC8349EAMDS) |
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195 | |
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196 | /* |
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197 | * deselect given device |
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198 | * GPIO1[0] is nSEL_SPI for M25P40 |
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199 | * set it to be inactive/high |
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200 | */ |
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201 | mpc83xx.gpio[0].gpdat |= (1 << (31- 0)); |
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202 | |
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203 | #elif defined( HSC_CM01) |
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204 | |
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205 | /* |
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206 | * deselect device |
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207 | * GPIO1[27] is high-active strobe |
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208 | */ |
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209 | mpc83xx.gpio[0].gpdat &= ~(1 << (31- 27)); |
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210 | |
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211 | #endif |
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212 | |
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213 | #if defined(DEBUG) |
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214 | printk("... exit OK\r\n"); |
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215 | #endif |
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216 | return 0; |
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217 | } |
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218 | |
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219 | /*=========================================================================*\ |
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220 | | list of handlers | |
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221 | \*=========================================================================*/ |
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222 | |
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223 | rtems_libi2c_bus_ops_t bsp_spi_ops = { |
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224 | .init = mpc83xx_spi_init, |
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225 | .send_start = bsp_spi_send_start_dummy, |
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226 | .send_stop = bsp_spi_send_stop, |
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227 | .send_addr = bsp_spi_sel_addr, |
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228 | .read_bytes = mpc83xx_spi_read_bytes, |
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229 | .write_bytes = mpc83xx_spi_write_bytes, |
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230 | .ioctl = mpc83xx_spi_ioctl |
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231 | }; |
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232 | |
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233 | static mpc83xx_spi_desc_t bsp_spi_bus_desc = { |
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234 | {/* public fields */ |
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235 | .ops = &bsp_spi_ops, |
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236 | .size = sizeof(bsp_spi_bus_desc) |
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237 | }, |
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238 | { /* our private fields */ |
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239 | .reg_ptr =&mpc83xx.spi, |
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240 | .initialized = FALSE, |
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241 | .irq_number = BSP_IPIC_IRQ_SPI, |
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242 | .base_frq = 0 /* filled in during init */ |
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243 | } |
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244 | }; |
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245 | |
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246 | #ifdef MPC8313ERDB |
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247 | |
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248 | #include <libchip/spi-sd-card.h> |
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249 | |
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250 | #define SD_CARD_NUMBER 1 |
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251 | |
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252 | size_t sd_card_driver_table_size = SD_CARD_NUMBER; |
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253 | |
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254 | sd_card_driver_entry sd_card_driver_table [SD_CARD_NUMBER] = { |
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255 | { |
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256 | .device_name = "/dev/sd-card-a", |
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257 | .bus = 0, |
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258 | .transfer_mode = SD_CARD_TRANSFER_MODE_DEFAULT, |
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259 | .command = SD_CARD_COMMAND_DEFAULT, |
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260 | /* .response = whatever, */ |
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261 | .response_index = SD_CARD_COMMAND_SIZE, |
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262 | .n_ac_max = SD_CARD_N_AC_MAX_DEFAULT, |
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263 | .block_number = 0, |
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264 | .block_size = 0, |
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265 | .block_size_shift = 0, |
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266 | .busy = true, |
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267 | .verbose = true, |
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268 | .schedule_if_busy = false |
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269 | } |
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270 | }; |
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271 | |
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272 | #endif /* MPC8313ERDB */ |
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273 | |
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274 | |
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275 | /*=========================================================================*\ |
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276 | | initialization | |
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277 | \*=========================================================================*/ |
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278 | |
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279 | /*=========================================================================*\ |
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280 | | Function: | |
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281 | \*-------------------------------------------------------------------------*/ |
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282 | rtems_status_code bsp_register_spi |
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283 | ( |
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284 | /*-------------------------------------------------------------------------*\ |
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285 | | Purpose: | |
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286 | | register SPI bus and devices | |
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287 | +---------------------------------------------------------------------------+ |
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288 | | Input Parameters: | |
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289 | \*-------------------------------------------------------------------------*/ |
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290 | void /* <none> */ |
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291 | ) |
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292 | /*-------------------------------------------------------------------------*\ |
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293 | | Return Value: | |
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294 | | 0 or error code | |
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295 | \*=========================================================================*/ |
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296 | { |
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297 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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298 | int ret_code; |
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299 | unsigned spi_busno; |
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300 | |
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301 | /* |
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302 | * init I2C library (if not already done) |
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303 | */ |
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304 | rtems_libi2c_initialize (); |
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305 | |
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306 | /* |
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307 | * init port pins used to address/select SPI devices |
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308 | */ |
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309 | |
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310 | #if defined( MPC8313ERDB) |
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311 | |
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312 | /* |
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313 | * Configured as master (direct connection to SD card) |
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314 | * |
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315 | * GPIO[28] : SOUT |
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316 | * GPIO[29] : SIN |
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317 | * GPIO[30] : SCLK |
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318 | * GPIO[02] : SCS (inactive high), GPIO[02] is normally connected to U43 at |
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319 | * pin 15 of MC74LCX244DT. |
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320 | */ |
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321 | |
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322 | /* Function */ |
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323 | mpc83xx.syscon.sicrl = (mpc83xx.syscon.sicrl & ~0x03fc0000) | 0x30000000; |
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324 | |
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325 | /* Direction */ |
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326 | mpc83xx.gpio [0].gpdir = (mpc83xx.gpio [0].gpdir & ~0x0000000f) | 0x2000000b; |
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327 | |
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328 | /* Data */ |
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329 | mpc83xx.gpio [0].gpdat |= 0x20000000; |
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330 | |
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331 | /* Open Drain */ |
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332 | /* mpc83xx.gpio [0].gpdr |= 0x0000000f; */ |
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333 | |
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334 | #elif defined( MPC8349EAMDS) |
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335 | |
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336 | /* |
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337 | * GPIO1[0] is nSEL_SPI for M25P40 |
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338 | * set it to be output, high |
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339 | */ |
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340 | mpc83xx.gpio[0].gpdat |= (1 << (31- 0)); |
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341 | mpc83xx.gpio[0].gpdir |= (1 << (31- 0)); |
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342 | mpc83xx.gpio[0].gpdr &= ~(1 << (31- 0)); |
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343 | |
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344 | #elif defined( HSC_CM01) |
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345 | |
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346 | /* |
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347 | * GPIO1[24] is SPI_A0 |
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348 | * GPIO1[25] is SPI_A1 |
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349 | * GPIO1[26] is SPI_A2 |
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350 | * GPIO1[27] is high-active strobe |
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351 | * set pins to be output, low |
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352 | */ |
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353 | mpc83xx.gpio[0].gpdat &= ~(0xf << (31-27)); |
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354 | mpc83xx.gpio[0].gpdir |= (0xf << (31-27)); |
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355 | mpc83xx.gpio[0].gpdr &= ~(0xf << (31-27)); |
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356 | |
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357 | #endif |
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358 | |
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359 | /* |
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360 | * update base frequency in spi descriptor |
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361 | */ |
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362 | bsp_spi_bus_desc.softc.base_frq = BSP_bus_frequency; |
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363 | |
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364 | /* |
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365 | * register SPI bus |
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366 | */ |
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367 | ret_code = rtems_libi2c_register_bus("/dev/spi", |
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368 | &(bsp_spi_bus_desc.bus_desc)); |
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369 | if (ret_code < 0) { |
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370 | return -ret_code; |
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371 | } |
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372 | spi_busno = (unsigned) ret_code; |
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373 | |
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374 | #if defined( MPC8313ERDB) |
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375 | |
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376 | /* Register SD Card driver */ |
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377 | sd_card_driver_table [0].bus = spi_busno; |
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378 | sc = sd_card_register(); |
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379 | if (sc != RTEMS_SUCCESSFUL) { |
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380 | return sc; |
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381 | } |
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382 | |
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383 | #elif defined( MPC8349EAMDS) |
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384 | |
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385 | /* |
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386 | * register M25P40 Flash |
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387 | */ |
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388 | ret_code = rtems_libi2c_register_drv(RTEMS_BSP_SPI_FLASH_DEVICE_NAME, |
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389 | spi_flash_m25p40_rw_driver_descriptor, |
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390 | spi_busno,0x00); |
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391 | #elif defined(HSC_CM01) |
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392 | |
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393 | /* |
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394 | * register FM25L256 FRAM |
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395 | */ |
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396 | ret_code = rtems_libi2c_register_drv(RTEMS_BSP_SPI_FRAM_DEVICE_NAME, |
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397 | spi_fram_fm25l256_rw_driver_descriptor, |
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398 | spi_busno,0x02); |
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399 | |
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400 | #endif |
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401 | |
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402 | if (ret_code < 0) { |
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403 | return -ret_code; |
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404 | } |
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405 | |
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406 | /* |
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407 | * FIXME: further drivers, when available |
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408 | */ |
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409 | return 0; |
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410 | } |
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