1 | /*===============================================================*\ |
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2 | | Project: RTEMS PC386 IDE harddisc driver | |
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3 | +-----------------------------------------------------------------+ |
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4 | | File: ide.c | |
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5 | +-----------------------------------------------------------------+ |
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6 | | Copyright (c) 2003 IMD | |
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7 | | Ingenieurbuero fuer Microcomputertechnik Th. Doerfler | |
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8 | | <Thomas.Doerfler@imd-systems.de> | |
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9 | | all rights reserved | |
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10 | +-----------------------------------------------------------------+ |
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11 | | this file contains the BSP layer for IDE access below the | |
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12 | | libchip IDE harddisc driver | |
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13 | | based on a board specific driver from | |
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14 | | Eugeny S. Mints, Oktet | |
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15 | | | |
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16 | | The license and distribution terms for this file may be | |
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17 | | found in the file LICENSE in this distribution or at | |
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18 | | http://www.rtems.com/license/LICENSE. | |
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19 | | | |
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20 | +-----------------------------------------------------------------+ |
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21 | | date history ID | |
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22 | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
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23 | | 01.14.03 creation doe | |
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24 | \*===============================================================*/ |
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25 | |
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26 | #include <rtems.h> |
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27 | #include <bsp.h> |
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28 | #include <libchip/ide_ctrl.h> |
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29 | #include <libchip/ide_ctrl_cfg.h> |
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30 | #include <libchip/ide_ctrl_io.h> |
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31 | |
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32 | /* #define DEBUG_OUT */ |
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33 | |
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34 | /* Not using this currently */ |
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35 | #if 0 |
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36 | static bool pc386_ide_status_busy (uint32_t port, |
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37 | uint32_t timeout, |
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38 | uint8_t* status_val) |
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39 | { |
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40 | do |
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41 | { |
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42 | inport_byte (port + IDE_REGISTER_STATUS, *status_val); |
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43 | if ((*status_val & IDE_REGISTER_STATUS_BSY) == 0) |
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44 | return true; |
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45 | |
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46 | if (timeout) |
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47 | { |
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48 | timeout--; |
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49 | rtems_task_wake_after (TOD_MICROSECONDS_TO_TICKS (1000)); |
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50 | } |
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51 | } |
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52 | while (timeout); |
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53 | |
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54 | return false; |
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55 | } |
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56 | #endif |
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57 | |
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58 | static bool pc386_ide_status_data_ready (uint32_t port, |
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59 | uint32_t timeout, |
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60 | uint8_t* status_val) |
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61 | { |
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62 | do |
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63 | { |
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64 | inport_byte (port + IDE_REGISTER_STATUS, *status_val); |
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65 | |
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66 | if (((*status_val & IDE_REGISTER_STATUS_BSY) == 0) && |
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67 | (*status_val & IDE_REGISTER_STATUS_DRQ)) |
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68 | return true; |
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69 | |
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70 | if (timeout) |
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71 | { |
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72 | timeout--; |
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73 | rtems_task_wake_after (TOD_MICROSECONDS_TO_TICKS (1000)); |
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74 | } |
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75 | } |
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76 | while (timeout); |
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77 | |
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78 | return false; |
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79 | } |
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80 | |
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81 | /* |
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82 | * support functions for IDE harddisk IF |
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83 | */ |
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84 | /*=========================================================================*\ |
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85 | | Function: | |
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86 | \*-------------------------------------------------------------------------*/ |
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87 | bool pc386_ide_probe |
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88 | ( |
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89 | /*-------------------------------------------------------------------------*\ |
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90 | | Purpose: | |
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91 | | This function should probe, whether a IDE disk is available | |
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92 | +---------------------------------------------------------------------------+ |
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93 | | Input Parameters: | |
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94 | \*-------------------------------------------------------------------------*/ |
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95 | int minor |
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96 | ) |
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97 | /*-------------------------------------------------------------------------*\ |
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98 | | Return Value: | |
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99 | | true, when flash disk available | |
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100 | \*=========================================================================*/ |
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101 | { |
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102 | bool ide_card_plugged = true; /* assume: we have a disk here */ |
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103 | |
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104 | return ide_card_plugged; |
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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 | void pc386_ide_initialize |
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111 | ( |
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112 | /*-------------------------------------------------------------------------*\ |
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113 | | Purpose: | |
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114 | | initialize IDE access | |
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115 | +---------------------------------------------------------------------------+ |
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116 | | Input Parameters: | |
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117 | \*-------------------------------------------------------------------------*/ |
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118 | int minor /* controller minor number */ |
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119 | ) |
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120 | /*-------------------------------------------------------------------------*\ |
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121 | | Return Value: | |
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122 | | <none> | |
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123 | \*=========================================================================*/ |
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124 | { |
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125 | /* |
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126 | * FIXME: enable interrupts, if needed |
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127 | */ |
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128 | } |
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129 | |
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130 | /*=========================================================================*\ |
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131 | | Function: | |
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132 | \*-------------------------------------------------------------------------*/ |
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133 | void pc386_ide_read_reg |
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134 | ( |
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135 | /*-------------------------------------------------------------------------*\ |
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136 | | Purpose: | |
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137 | | read a IDE controller register | |
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138 | +---------------------------------------------------------------------------+ |
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139 | | Input Parameters: | |
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140 | \*-------------------------------------------------------------------------*/ |
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141 | int minor, /* controller minor number */ |
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142 | int reg, /* register index to access */ |
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143 | uint16_t *value /* ptr to return value location */ |
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144 | ) |
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145 | /*-------------------------------------------------------------------------*\ |
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146 | | Return Value: | |
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147 | | <none> | |
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148 | \*=========================================================================*/ |
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149 | { |
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150 | uint32_t port = IDE_Controller_Table[minor].port1; |
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151 | uint8_t bval1,bval2; |
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152 | |
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153 | if (reg == IDE_REGISTER_DATA_WORD) { |
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154 | inport_byte(port+reg, bval1); |
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155 | inport_byte(port+reg+1, bval2); |
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156 | *value = bval1 + (bval2 << 8); |
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157 | } |
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158 | else { |
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159 | inport_byte(port+reg, bval1); |
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160 | *value = bval1; |
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161 | } |
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162 | #ifdef DEBUG_OUT |
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163 | printk("pc386_ide_read_reg (0x%x)=0x%x\r\n",reg,*value & 0xff); |
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164 | #endif |
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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 | void pc386_ide_write_reg |
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171 | ( |
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172 | /*-------------------------------------------------------------------------*\ |
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173 | | Purpose: | |
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174 | | write a IDE controller register | |
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175 | +---------------------------------------------------------------------------+ |
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176 | | Input Parameters: | |
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177 | \*-------------------------------------------------------------------------*/ |
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178 | int minor, /* controller minor number */ |
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179 | int reg, /* register index to access */ |
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180 | uint16_t value /* value to write */ |
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181 | ) |
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182 | /*-------------------------------------------------------------------------*\ |
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183 | | Return Value: | |
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184 | | <none> | |
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185 | \*=========================================================================*/ |
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186 | { |
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187 | uint32_t port = IDE_Controller_Table[minor].port1; |
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188 | |
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189 | #ifdef DEBUG_OUT |
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190 | printk("pc386_ide_write_reg(0x%x,0x%x)\r\n",reg,value & 0xff); |
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191 | #endif |
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192 | if (reg == IDE_REGISTER_DATA_WORD) { |
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193 | outport_word(port+reg,value); |
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194 | } |
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195 | else { |
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196 | outport_byte(port+reg,value); |
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197 | } |
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198 | } |
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199 | |
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200 | /*=========================================================================*\ |
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201 | | Function: | |
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202 | \*-------------------------------------------------------------------------*/ |
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203 | void pc386_ide_read_block |
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204 | ( |
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205 | /*-------------------------------------------------------------------------*\ |
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206 | | Purpose: | |
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207 | | read a IDE controller data block | |
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208 | +---------------------------------------------------------------------------+ |
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209 | | Input Parameters: | |
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210 | \*-------------------------------------------------------------------------*/ |
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211 | int minor, |
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212 | uint16_t block_size, |
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213 | rtems_blkdev_sg_buffer *bufs, |
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214 | uint32_t *cbuf, |
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215 | uint32_t *pos |
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216 | ) |
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217 | /*-------------------------------------------------------------------------*\ |
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218 | | Return Value: | |
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219 | | <none> | |
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220 | \*=========================================================================*/ |
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221 | { |
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222 | uint32_t port = IDE_Controller_Table[minor].port1; |
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223 | uint16_t cnt = 0; |
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224 | uint32_t llength = bufs[(*cbuf)].length; |
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225 | uint8_t status_val; |
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226 | uint16_t *lbuf = (uint16_t*) |
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227 | ((uint8_t*)(bufs[(*cbuf)].buffer) + (*pos)); |
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228 | |
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229 | while (cnt < block_size) |
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230 | { |
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231 | if (!pc386_ide_status_data_ready (port, 100, &status_val)) |
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232 | { |
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233 | printk ("pc386_ide_read_block: status=%02x, cnt=%d bs=%d\n", status_val, cnt, block_size); |
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234 | /* FIXME: add an error here. */ |
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235 | return; |
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236 | } |
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237 | |
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238 | if (status_val & IDE_REGISTER_STATUS_ERR) |
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239 | printk("pc386_ide_read_block: error: %02x\n", status_val); |
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240 | |
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241 | inport_word(port+IDE_REGISTER_DATA,*lbuf); |
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242 | |
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243 | #ifdef DEBUG_OUT |
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244 | printk("0x%x ",*lbuf); |
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245 | #endif |
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246 | |
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247 | lbuf++; |
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248 | cnt += sizeof(*lbuf); |
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249 | (*pos) += sizeof(*lbuf); |
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250 | if ((*pos) == llength) { |
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251 | (*pos) = 0; |
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252 | (*cbuf)++; |
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253 | lbuf = bufs[(*cbuf)].buffer; |
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254 | llength = bufs[(*cbuf)].length; |
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255 | } |
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256 | } |
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257 | } |
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258 | |
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259 | /*=========================================================================*\ |
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260 | | Function: | |
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261 | \*-------------------------------------------------------------------------*/ |
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262 | void pc386_ide_write_block |
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263 | ( |
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264 | /*-------------------------------------------------------------------------*\ |
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265 | | Purpose: | |
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266 | | write a IDE controller data block | |
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267 | +---------------------------------------------------------------------------+ |
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268 | | Input Parameters: | |
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269 | \*-------------------------------------------------------------------------*/ |
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270 | int minor, |
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271 | uint16_t block_size, |
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272 | rtems_blkdev_sg_buffer *bufs, |
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273 | uint32_t *cbuf, |
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274 | uint32_t *pos |
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275 | ) |
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276 | /*-------------------------------------------------------------------------*\ |
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277 | | Return Value: | |
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278 | | <none> | |
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279 | \*=========================================================================*/ |
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280 | { |
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281 | uint32_t port = IDE_Controller_Table[minor].port1; |
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282 | uint16_t cnt = 0; |
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283 | uint32_t llength = bufs[(*cbuf)].length; |
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284 | uint8_t status_val; |
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285 | uint16_t *lbuf = (uint16_t*) |
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286 | ((uint8_t*)(bufs[(*cbuf)].buffer) + (*pos)); |
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287 | |
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288 | #ifdef DEBUG_OUT |
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289 | printk("pc386_ide_write_block()\n"); |
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290 | #endif |
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291 | |
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292 | while (cnt < block_size) |
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293 | { |
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294 | if (!pc386_ide_status_data_ready (port, 100, &status_val)) |
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295 | { |
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296 | printk ("pc386_ide_write_block: status=%02x, cnt=%d bs=%d\n", status_val, cnt, block_size); |
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297 | /* FIXME: add an error here. */ |
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298 | return; |
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299 | } |
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300 | |
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301 | if (status_val & IDE_REGISTER_STATUS_ERR) |
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302 | printk("pc386_ide_write_block: error: %02x\n", status_val); |
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303 | |
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304 | #ifdef DEBUG_OUT |
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305 | printk("0x%x ",*lbuf); |
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306 | #endif |
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307 | outport_word(port+IDE_REGISTER_DATA,*lbuf); |
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308 | lbuf++; |
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309 | cnt += sizeof(*lbuf); |
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310 | (*pos) += sizeof(*lbuf); |
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311 | if ((*pos) == llength) { |
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312 | (*pos) = 0; |
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313 | (*cbuf)++; |
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314 | lbuf = bufs[(*cbuf)].buffer; |
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315 | llength = bufs[(*cbuf)].length; |
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316 | } |
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317 | } |
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318 | } |
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319 | |
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320 | /*=========================================================================*\ |
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321 | | Function: | |
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322 | \*-------------------------------------------------------------------------*/ |
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323 | int pc386_ide_control |
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324 | ( |
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325 | /*-------------------------------------------------------------------------*\ |
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326 | | Purpose: | |
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327 | | control interface for controller | |
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328 | +---------------------------------------------------------------------------+ |
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329 | | Input Parameters: | |
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330 | \*-------------------------------------------------------------------------*/ |
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331 | int minor, /* controller minor number */ |
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332 | uint32_t cmd, /* command to send */ |
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333 | void * arg /* optional argument */ |
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334 | ) |
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335 | /*-------------------------------------------------------------------------*\ |
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336 | | Return Value: | |
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337 | | <none> | |
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338 | \*=========================================================================*/ |
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339 | { |
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340 | return 0; |
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341 | } |
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342 | |
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343 | /*=========================================================================*\ |
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344 | | Function: | |
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345 | \*-------------------------------------------------------------------------*/ |
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346 | rtems_status_code pc386_ide_config_io_speed |
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347 | ( |
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348 | /*-------------------------------------------------------------------------*\ |
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349 | | Purpose: | |
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350 | | set up transfer speed, if possible | |
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351 | +---------------------------------------------------------------------------+ |
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352 | | Input Parameters: | |
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353 | \*-------------------------------------------------------------------------*/ |
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354 | int minor, /* controller minor number */ |
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355 | uint16_t modes_avail /* optional argument */ |
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356 | ) |
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357 | /*-------------------------------------------------------------------------*\ |
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358 | | Return Value: | |
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359 | | rtems_status_code | |
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360 | \*=========================================================================*/ |
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361 | { |
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362 | return RTEMS_SUCCESSFUL; |
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363 | } |
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364 | |
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365 | /* |
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366 | * The following table configures the functions used for IDE drivers |
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367 | * in this BSP. |
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368 | */ |
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369 | |
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370 | ide_ctrl_fns_t pc386_ide_ctrl_fns = { |
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371 | pc386_ide_probe, |
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372 | pc386_ide_initialize, |
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373 | pc386_ide_control, |
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374 | pc386_ide_read_reg, |
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375 | pc386_ide_write_reg, |
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376 | pc386_ide_read_block, |
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377 | pc386_ide_write_block, |
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378 | pc386_ide_config_io_speed |
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379 | }; |
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