1 | /* |
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2 | * ide_controller.c |
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3 | * |
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4 | * This is generic rtems driver for IDE controllers. |
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5 | * |
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6 | * Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia |
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7 | * Authors: Alexandra Kossovsky <sasha@oktet.ru> |
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8 | * Eugeny S. Mints <Eugeny.Mints@oktet.ru> |
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9 | * |
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10 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.rtems.com/license/LICENSE. |
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13 | * |
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14 | * $Id$ |
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15 | * |
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16 | */ |
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17 | |
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18 | #define IDE_CONTROLLER_TRACE 0 |
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19 | |
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20 | #include <rtems/chain.h> |
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21 | #include <assert.h> |
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22 | #include <rtems/blkdev.h> |
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23 | |
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24 | #include <libchip/ide_ctrl_cfg.h> |
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25 | #include <libchip/ide_ctrl_io.h> |
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26 | |
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27 | #if IDE_CONTROLLER_TRACE |
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28 | int ide_controller_trace = 1; |
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29 | #endif |
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30 | |
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31 | /* |
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32 | * ide_controller_initialize -- |
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33 | * Initializes all configured IDE controllers. Controllers configuration |
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34 | * table is provided by BSP |
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35 | * |
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36 | * PARAMETERS: |
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37 | * major - device major number |
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38 | * minor_arg - device minor number |
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39 | * args - arguments |
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40 | * |
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41 | * RETURNS: |
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42 | * RTEMS_SUCCESSFUL on success, or error code if |
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43 | * error occured |
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44 | */ |
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45 | rtems_device_driver |
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46 | ide_controller_initialize(rtems_device_major_number major, |
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47 | rtems_device_minor_number minor_arg, |
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48 | void *args) |
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49 | { |
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50 | unsigned long minor; |
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51 | rtems_status_code status; |
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52 | |
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53 | /* FIXME: may be it should be done on compilation phase */ |
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54 | if (IDE_Controller_Count > IDE_CTRL_MAX_MINOR_NUMBER) |
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55 | rtems_fatal_error_occurred(RTEMS_TOO_MANY); |
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56 | |
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57 | for (minor=0; minor < IDE_Controller_Count; minor++) |
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58 | { |
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59 | IDE_Controller_Table[minor].status = IDE_CTRL_NON_INITIALIZED; |
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60 | |
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61 | if ((IDE_Controller_Table[minor].probe == NULL || |
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62 | IDE_Controller_Table[minor].probe(minor)) && |
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63 | (IDE_Controller_Table[minor].fns->ctrl_probe == NULL || |
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64 | IDE_Controller_Table[minor].fns->ctrl_probe(minor))) |
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65 | { |
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66 | status = rtems_io_register_name(IDE_Controller_Table[minor].name, |
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67 | major, minor); |
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68 | if (status != RTEMS_SUCCESSFUL) |
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69 | rtems_fatal_error_occurred(status); |
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70 | |
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71 | IDE_Controller_Table[minor].fns->ctrl_initialize(minor); |
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72 | |
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73 | IDE_Controller_Table[minor].status = IDE_CTRL_INITIALIZED; |
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74 | } |
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75 | } |
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76 | return RTEMS_SUCCESSFUL; |
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77 | } |
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78 | |
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79 | /* |
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80 | * ide_controller_read_data_block -- |
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81 | * Read data block via controller's data register |
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82 | * |
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83 | * PARAMETERS: |
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84 | * minor - minor number of controller |
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85 | * block_size - number of bytes to read |
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86 | * bufs - set of buffers to store data |
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87 | * cbuf - number of current buffer from the set |
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88 | * pos - position inside current buffer 'cbuf' |
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89 | * |
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90 | * RETURNS: |
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91 | * NONE |
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92 | */ |
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93 | void |
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94 | ide_controller_read_data_block(rtems_device_minor_number minor, |
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95 | uint32_t block_size, |
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96 | rtems_blkdev_sg_buffer *bufs, |
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97 | uint32_t *cbuf, |
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98 | uint32_t *pos) |
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99 | { |
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100 | #if IDE_CONTROLLER_TRACE |
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101 | if (ide_controller_trace) |
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102 | printk ("IDE data block read: %d:%d\n", *cbuf, bufs[*cbuf].block); |
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103 | #endif |
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104 | IDE_Controller_Table[minor].fns->ctrl_read_block(minor, block_size, bufs, |
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105 | cbuf, pos); |
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106 | } |
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107 | |
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108 | /* |
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109 | * ide_controller_write_data_block -- |
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110 | * Write data block via controller's data register |
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111 | * |
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112 | * PARAMETERS: |
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113 | * minor - minor number of controller |
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114 | * block_size - number of bytes to write |
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115 | * bufs - set of buffers which store data |
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116 | * cbuf - number of current buffer from the set |
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117 | * pos - position inside current buffer 'cbuf' |
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118 | * |
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119 | * RETURNS: |
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120 | * NONE |
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121 | */ |
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122 | void |
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123 | ide_controller_write_data_block(rtems_device_minor_number minor, |
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124 | uint32_t block_size, |
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125 | rtems_blkdev_sg_buffer *bufs, |
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126 | uint32_t *cbuf, |
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127 | uint32_t *pos) |
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128 | |
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129 | { |
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130 | #if IDE_CONTROLLER_TRACE |
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131 | if (ide_controller_trace) |
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132 | printk ("IDE data block write: %d:%d\n", *cbuf, bufs[*cbuf].block); |
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133 | #endif |
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134 | IDE_Controller_Table[minor].fns->ctrl_write_block(minor, block_size, bufs, |
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135 | cbuf, pos); |
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136 | } |
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137 | |
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138 | /* |
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139 | * ide_controller_read_register -- |
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140 | * Read controller's register |
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141 | * |
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142 | * PARAMETERS: |
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143 | * minor - minor number of controller |
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144 | * reg - register to read |
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145 | * value - placeholder for result |
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146 | * |
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147 | * RETURNS |
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148 | * NONE |
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149 | */ |
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150 | void |
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151 | ide_controller_read_register(rtems_device_minor_number minor, |
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152 | int reg, |
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153 | uint16_t *value) |
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154 | { |
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155 | IDE_Controller_Table[minor].fns->ctrl_reg_read(minor, reg, value); |
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156 | #if IDE_CONTROLLER_TRACE |
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157 | if (ide_controller_trace) |
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158 | printk ("IDE read reg: %d => %04x\n", reg, *value); |
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159 | #endif |
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160 | } |
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161 | |
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162 | /* |
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163 | * ide_controller_write_register -- |
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164 | * Write controller's register |
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165 | * |
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166 | * PARAMETERS: |
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167 | * minor - minor number of controller |
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168 | * reg - register to write |
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169 | * value - value to write |
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170 | * |
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171 | * RETURNS: |
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172 | * NONE |
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173 | */ |
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174 | void |
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175 | ide_controller_write_register(rtems_device_minor_number minor, int reg, |
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176 | uint16_t value) |
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177 | { |
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178 | #if IDE_CONTROLLER_TRACE |
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179 | if (ide_controller_trace) |
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180 | printk ("IDE write reg: %d => %04x\n", reg, value); |
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181 | #endif |
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182 | IDE_Controller_Table[minor].fns->ctrl_reg_write(minor, reg, value); |
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183 | } |
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184 | |
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185 | /* |
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186 | * ide_controller_config_io_speed -- |
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187 | * Set controller's speed of IO operations |
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188 | * |
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189 | * PARAMETERS: |
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190 | * minor - minor number of controller |
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191 | * modes_available - speeds available |
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192 | * |
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193 | * RETURNS: |
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194 | * RTEMS_SUCCESSFUL on success, or error code if |
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195 | * error occured |
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196 | */ |
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197 | rtems_status_code |
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198 | ide_controller_config_io_speed(int minor, uint16_t modes_available) |
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199 | { |
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200 | return IDE_Controller_Table[minor].fns->ctrl_config_io_speed( |
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201 | minor, |
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202 | modes_available); |
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203 | } |
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