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 | bool pc386_ide_show; |
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33 | |
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34 | /* #define DEBUG_OUT */ |
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35 | |
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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 | |
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57 | static bool pc386_ide_status_data_ready (uint32_t port, |
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58 | uint32_t timeout, |
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59 | uint8_t* status_val) |
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60 | { |
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61 | do |
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62 | { |
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63 | inport_byte (port + IDE_REGISTER_STATUS, *status_val); |
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64 | |
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65 | if (((*status_val & IDE_REGISTER_STATUS_BSY) == 0) && |
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66 | (*status_val & IDE_REGISTER_STATUS_DRQ)) |
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67 | return true; |
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68 | |
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69 | if (timeout) |
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70 | { |
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71 | timeout--; |
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72 | rtems_task_wake_after (TOD_MICROSECONDS_TO_TICKS (1000)); |
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73 | } |
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74 | } |
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75 | while (timeout); |
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76 | |
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77 | return false; |
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78 | } |
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79 | |
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80 | /* |
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81 | * support functions for IDE harddisk IF |
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82 | */ |
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83 | /*=========================================================================*\ |
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84 | | Function: | |
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85 | \*-------------------------------------------------------------------------*/ |
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86 | bool pc386_ide_probe |
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87 | ( |
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88 | /*-------------------------------------------------------------------------*\ |
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89 | | Purpose: | |
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90 | | This function should probe, whether a IDE disk is available | |
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91 | +---------------------------------------------------------------------------+ |
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92 | | Input Parameters: | |
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93 | \*-------------------------------------------------------------------------*/ |
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94 | int minor |
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95 | ) |
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96 | /*-------------------------------------------------------------------------*\ |
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97 | | Return Value: | |
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98 | | true, when flash disk available | |
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99 | \*=========================================================================*/ |
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100 | { |
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101 | bool ide_card_plugged = true; /* assume: we have a disk here */ |
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102 | |
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103 | return ide_card_plugged; |
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104 | } |
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105 | |
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106 | static void wait(volatile uint32_t loops) |
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107 | { |
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108 | while (loops) |
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109 | loops--; |
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110 | } |
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111 | |
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112 | /*=========================================================================*\ |
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113 | | Function: | |
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114 | \*-------------------------------------------------------------------------*/ |
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115 | void pc386_ide_initialize |
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116 | ( |
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117 | /*-------------------------------------------------------------------------*\ |
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118 | | Purpose: | |
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119 | | initialize IDE access | |
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120 | +---------------------------------------------------------------------------+ |
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121 | | Input Parameters: | |
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122 | \*-------------------------------------------------------------------------*/ |
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123 | int minor /* controller minor number */ |
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124 | ) |
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125 | /*-------------------------------------------------------------------------*\ |
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126 | | Return Value: | |
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127 | | <none> | |
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128 | \*=========================================================================*/ |
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129 | { |
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130 | uint32_t port = IDE_Controller_Table[minor].port1; |
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131 | uint8_t dev = 0; |
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132 | |
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133 | if (pc386_ide_show) |
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134 | printk("IDE%d: port base: %04x\n", minor, port); |
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135 | |
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136 | outport_byte(port+IDE_REGISTER_DEVICE_HEAD, |
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137 | (dev << IDE_REGISTER_DEVICE_HEAD_DEV_POS) | 0xE0); |
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138 | wait(10000); |
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139 | outport_byte(port+IDE_REGISTER_DEVICE_CONTROL, |
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140 | IDE_REGISTER_DEVICE_CONTROL_SRST | IDE_REGISTER_DEVICE_CONTROL_nIEN); |
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141 | wait(10000); |
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142 | outport_byte(port+IDE_REGISTER_DEVICE_CONTROL, |
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143 | IDE_REGISTER_DEVICE_CONTROL_nIEN); |
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144 | wait(10000); |
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145 | |
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146 | for (dev = 0; dev < 2; dev++) |
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147 | { |
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148 | uint32_t byte; |
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149 | uint8_t status; |
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150 | uint8_t error; |
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151 | uint8_t cyllsb; |
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152 | uint8_t cylmsb; |
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153 | const char* label = dev ? " slave" : "master"; |
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154 | char model_number[41]; |
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155 | char* p = &model_number[0]; |
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156 | |
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157 | memset(model_number, 0, sizeof(model_number)); |
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158 | |
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159 | outport_byte(port+IDE_REGISTER_DEVICE_HEAD, |
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160 | (dev << IDE_REGISTER_DEVICE_HEAD_DEV_POS) | 0xE0); |
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161 | /* |
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162 | outport_byte(port+IDE_REGISTER_SECTOR_NUMBER, |
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163 | (dev << IDE_REGISTER_DEVICE_HEAD_DEV_POS) | IDE_REGISTER_LBA3_L); |
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164 | */ |
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165 | |
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166 | outport_byte(port+IDE_REGISTER_COMMAND, 0x00); |
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167 | |
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168 | if (!pc386_ide_status_busy (port, 6000, &status)) |
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169 | continue; |
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170 | |
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171 | inport_byte(port+IDE_REGISTER_STATUS, status); |
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172 | inport_byte(port+IDE_REGISTER_ERROR, error); |
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173 | inport_byte(port+IDE_REGISTER_CYLINDER_LOW, cyllsb); |
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174 | inport_byte(port+IDE_REGISTER_CYLINDER_HIGH, cylmsb); |
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175 | |
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176 | if (pc386_ide_show) |
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177 | { |
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178 | printk("IDE%d:%s: status=%02x\n", minor, label, status); |
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179 | printk("IDE%d:%s: error=%02x\n", minor, label, error); |
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180 | printk("IDE%d:%s: cylinder-low=%02x\n", minor, label, cyllsb); |
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181 | printk("IDE%d:%s: cylinder-high=%02x\n", minor, label, cylmsb); |
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182 | } |
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183 | |
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184 | #if 0 |
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185 | /* |
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186 | * Filter based on the cylinder values and the status. |
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187 | * Taken from grub's ata.c. |
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188 | */ |
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189 | if (cyllsb != 0x14 || cylmsb != 0xeb) |
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190 | if (status == 0 || (cyllsb != 0 && cylmsb != 0 && |
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191 | cyllsb != 0xc3 && cylmsb != 0x3c)) |
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192 | { |
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193 | if (pc386_ide_show) |
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194 | printk("IDE%d:%s: bad device\n", minor, label); |
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195 | } |
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196 | #endif |
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197 | |
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198 | outport_byte(port+IDE_REGISTER_COMMAND, 0xec); |
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199 | |
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200 | if (!pc386_ide_status_busy (port, 6000, &status)) |
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201 | { |
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202 | if (pc386_ide_show) |
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203 | printk("IDE%d:%s: device busy: %02x\n", minor, label, status); |
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204 | continue; |
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205 | } |
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206 | |
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207 | byte = 0; |
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208 | while (byte < 512) |
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209 | { |
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210 | uint16_t word; |
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211 | bool data_ready; |
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212 | |
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213 | if (pc386_ide_show && ((byte % 16) == 0)) |
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214 | printk("\n %04x : ", byte); |
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215 | |
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216 | data_ready = pc386_ide_status_data_ready (port, 100, &status); |
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217 | |
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218 | if (status & IDE_REGISTER_STATUS_ERR) |
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219 | { |
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220 | inport_byte(port+IDE_REGISTER_ERROR, error); |
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221 | if (error != 4) |
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222 | { |
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223 | if (pc386_ide_show) |
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224 | printk("IDE%d:%s: error=%04x\n", minor, label, error); |
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225 | break; |
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226 | } |
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227 | /* |
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228 | * The device is an ATAPI device. |
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229 | */ |
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230 | outport_byte(port+IDE_REGISTER_COMMAND, 0xa1); |
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231 | continue; |
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232 | } |
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233 | |
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234 | if (!data_ready) |
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235 | break; |
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236 | |
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237 | inport_word(port+IDE_REGISTER_DATA, word); |
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238 | |
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239 | if (pc386_ide_show) |
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240 | printk ("%04x ", word); |
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241 | |
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242 | if (byte >= 54 && byte < (54 + 40)) |
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243 | { |
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244 | *p = word >> 8; |
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245 | p++; |
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246 | *p = word; |
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247 | p++; |
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248 | } |
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249 | |
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250 | byte += 2; |
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251 | } |
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252 | |
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253 | if (pc386_ide_show) |
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254 | printk("\nbytes read = %d\n", byte); |
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255 | |
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256 | if (p != &model_number[0]) |
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257 | printk("IDE%d:%s: %s\n", minor, label, model_number); |
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258 | } |
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259 | |
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260 | /* |
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261 | * FIXME: enable interrupts, if needed |
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262 | */ |
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263 | } |
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264 | |
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265 | /*=========================================================================*\ |
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266 | | Function: | |
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267 | \*-------------------------------------------------------------------------*/ |
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268 | void pc386_ide_read_reg |
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269 | ( |
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270 | /*-------------------------------------------------------------------------*\ |
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271 | | Purpose: | |
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272 | | read a IDE controller register | |
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273 | +---------------------------------------------------------------------------+ |
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274 | | Input Parameters: | |
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275 | \*-------------------------------------------------------------------------*/ |
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276 | int minor, /* controller minor number */ |
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277 | int reg, /* register index to access */ |
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278 | uint16_t *value /* ptr to return value location */ |
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279 | ) |
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280 | /*-------------------------------------------------------------------------*\ |
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281 | | Return Value: | |
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282 | | <none> | |
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283 | \*=========================================================================*/ |
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284 | { |
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285 | uint32_t port = IDE_Controller_Table[minor].port1; |
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286 | uint8_t bval1,bval2; |
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287 | |
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288 | if (reg == IDE_REGISTER_DATA_WORD) { |
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289 | inport_byte(port+reg, bval1); |
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290 | inport_byte(port+reg+1, bval2); |
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291 | *value = bval1 + (bval2 << 8); |
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292 | } |
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293 | else { |
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294 | inport_byte(port+reg, bval1); |
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295 | *value = bval1; |
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296 | } |
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297 | #ifdef DEBUG_OUT |
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298 | printk("pc386_ide_read_reg (0x%x)=0x%x\r\n",reg,*value & 0xff); |
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299 | #endif |
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300 | } |
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301 | |
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302 | /*=========================================================================*\ |
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303 | | Function: | |
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304 | \*-------------------------------------------------------------------------*/ |
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305 | void pc386_ide_write_reg |
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306 | ( |
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307 | /*-------------------------------------------------------------------------*\ |
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308 | | Purpose: | |
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309 | | write a IDE controller register | |
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310 | +---------------------------------------------------------------------------+ |
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311 | | Input Parameters: | |
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312 | \*-------------------------------------------------------------------------*/ |
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313 | int minor, /* controller minor number */ |
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314 | int reg, /* register index to access */ |
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315 | uint16_t value /* value to write */ |
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316 | ) |
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317 | /*-------------------------------------------------------------------------*\ |
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318 | | Return Value: | |
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319 | | <none> | |
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320 | \*=========================================================================*/ |
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321 | { |
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322 | uint32_t port = IDE_Controller_Table[minor].port1; |
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323 | |
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324 | #ifdef DEBUG_OUT |
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325 | printk("pc386_ide_write_reg(0x%x,0x%x)\r\n",reg,value & 0xff); |
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326 | #endif |
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327 | if (reg == IDE_REGISTER_DATA_WORD) { |
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328 | outport_word(port+reg,value); |
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329 | } |
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330 | else { |
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331 | outport_byte(port+reg,value); |
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332 | } |
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333 | } |
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334 | |
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335 | /*=========================================================================*\ |
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336 | | Function: | |
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337 | \*-------------------------------------------------------------------------*/ |
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338 | void pc386_ide_read_block |
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339 | ( |
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340 | /*-------------------------------------------------------------------------*\ |
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341 | | Purpose: | |
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342 | | read a IDE controller data block | |
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343 | +---------------------------------------------------------------------------+ |
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344 | | Input Parameters: | |
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345 | \*-------------------------------------------------------------------------*/ |
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346 | int minor, |
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347 | uint16_t block_size, |
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348 | rtems_blkdev_sg_buffer *bufs, |
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349 | uint32_t *cbuf, |
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350 | uint32_t *pos |
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351 | ) |
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352 | /*-------------------------------------------------------------------------*\ |
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353 | | Return Value: | |
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354 | | <none> | |
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355 | \*=========================================================================*/ |
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356 | { |
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357 | uint32_t port = IDE_Controller_Table[minor].port1; |
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358 | uint16_t cnt = 0; |
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359 | uint32_t llength = bufs[(*cbuf)].length; |
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360 | uint8_t status_val; |
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361 | uint16_t *lbuf = (uint16_t*) |
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362 | ((uint8_t*)(bufs[(*cbuf)].buffer) + (*pos)); |
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363 | |
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364 | while (cnt < block_size) |
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365 | { |
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366 | if (!pc386_ide_status_data_ready (port, 100, &status_val)) |
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367 | { |
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368 | printk ("pc386_ide_read_block: status=%02x, cnt=%d bs=%d\n", status_val, cnt, block_size); |
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369 | /* FIXME: add an error here. */ |
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370 | return; |
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371 | } |
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372 | |
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373 | if (status_val & IDE_REGISTER_STATUS_ERR) |
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374 | printk("pc386_ide_read_block: error: %02x\n", status_val); |
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375 | |
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376 | inport_word(port+IDE_REGISTER_DATA,*lbuf); |
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377 | |
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378 | #ifdef DEBUG_OUT |
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379 | printk("0x%x ",*lbuf); |
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380 | #endif |
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381 | |
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382 | lbuf++; |
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383 | cnt += sizeof(*lbuf); |
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384 | (*pos) += sizeof(*lbuf); |
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385 | if ((*pos) == llength) { |
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386 | (*pos) = 0; |
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387 | (*cbuf)++; |
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388 | lbuf = bufs[(*cbuf)].buffer; |
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389 | llength = bufs[(*cbuf)].length; |
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390 | } |
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391 | } |
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392 | } |
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393 | |
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394 | /*=========================================================================*\ |
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395 | | Function: | |
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396 | \*-------------------------------------------------------------------------*/ |
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397 | void pc386_ide_write_block |
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398 | ( |
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399 | /*-------------------------------------------------------------------------*\ |
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400 | | Purpose: | |
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401 | | write a IDE controller data block | |
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402 | +---------------------------------------------------------------------------+ |
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403 | | Input Parameters: | |
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404 | \*-------------------------------------------------------------------------*/ |
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405 | int minor, |
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406 | uint16_t block_size, |
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407 | rtems_blkdev_sg_buffer *bufs, |
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408 | uint32_t *cbuf, |
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409 | uint32_t *pos |
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410 | ) |
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411 | /*-------------------------------------------------------------------------*\ |
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412 | | Return Value: | |
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413 | | <none> | |
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414 | \*=========================================================================*/ |
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415 | { |
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416 | uint32_t port = IDE_Controller_Table[minor].port1; |
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417 | uint16_t cnt = 0; |
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418 | uint32_t llength = bufs[(*cbuf)].length; |
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419 | uint8_t status_val; |
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420 | uint16_t *lbuf = (uint16_t*) |
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421 | ((uint8_t*)(bufs[(*cbuf)].buffer) + (*pos)); |
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422 | |
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423 | #ifdef DEBUG_OUT |
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424 | printk("pc386_ide_write_block()\n"); |
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425 | #endif |
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426 | |
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427 | while (cnt < block_size) |
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428 | { |
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429 | if (!pc386_ide_status_data_ready (port, 100, &status_val)) |
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430 | { |
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431 | printk ("pc386_ide_write_block: status=%02x, cnt=%d bs=%d\n", status_val, cnt, block_size); |
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432 | /* FIXME: add an error here. */ |
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433 | return; |
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434 | } |
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435 | |
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436 | if (status_val & IDE_REGISTER_STATUS_ERR) |
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437 | printk("pc386_ide_write_block: error: %02x\n", status_val); |
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438 | |
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439 | #ifdef DEBUG_OUT |
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440 | printk("0x%x ",*lbuf); |
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441 | #endif |
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442 | outport_word(port+IDE_REGISTER_DATA,*lbuf); |
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443 | lbuf++; |
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444 | cnt += sizeof(*lbuf); |
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445 | (*pos) += sizeof(*lbuf); |
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446 | if ((*pos) == llength) { |
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447 | (*pos) = 0; |
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448 | (*cbuf)++; |
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449 | lbuf = bufs[(*cbuf)].buffer; |
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450 | llength = bufs[(*cbuf)].length; |
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451 | } |
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452 | } |
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453 | } |
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454 | |
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455 | /*=========================================================================*\ |
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456 | | Function: | |
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457 | \*-------------------------------------------------------------------------*/ |
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458 | int pc386_ide_control |
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459 | ( |
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460 | /*-------------------------------------------------------------------------*\ |
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461 | | Purpose: | |
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462 | | control interface for controller | |
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463 | +---------------------------------------------------------------------------+ |
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464 | | Input Parameters: | |
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465 | \*-------------------------------------------------------------------------*/ |
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466 | int minor, /* controller minor number */ |
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467 | uint32_t cmd, /* command to send */ |
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468 | void * arg /* optional argument */ |
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469 | ) |
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470 | /*-------------------------------------------------------------------------*\ |
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471 | | Return Value: | |
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472 | | <none> | |
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473 | \*=========================================================================*/ |
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474 | { |
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475 | return 0; |
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476 | } |
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477 | |
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478 | /*=========================================================================*\ |
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479 | | Function: | |
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480 | \*-------------------------------------------------------------------------*/ |
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481 | rtems_status_code pc386_ide_config_io_speed |
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482 | ( |
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483 | /*-------------------------------------------------------------------------*\ |
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484 | | Purpose: | |
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485 | | set up transfer speed, if possible | |
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486 | +---------------------------------------------------------------------------+ |
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487 | | Input Parameters: | |
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488 | \*-------------------------------------------------------------------------*/ |
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489 | int minor, /* controller minor number */ |
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490 | uint16_t modes_avail /* optional argument */ |
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491 | ) |
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492 | /*-------------------------------------------------------------------------*\ |
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493 | | Return Value: | |
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494 | | rtems_status_code | |
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495 | \*=========================================================================*/ |
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496 | { |
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497 | return RTEMS_SUCCESSFUL; |
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498 | } |
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499 | |
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500 | /* |
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501 | * The following table configures the functions used for IDE drivers |
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502 | * in this BSP. |
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503 | */ |
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504 | |
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505 | ide_ctrl_fns_t pc386_ide_ctrl_fns = { |
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506 | pc386_ide_probe, |
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507 | pc386_ide_initialize, |
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508 | pc386_ide_control, |
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509 | pc386_ide_read_reg, |
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510 | pc386_ide_write_reg, |
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511 | pc386_ide_read_block, |
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512 | pc386_ide_write_block, |
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513 | pc386_ide_config_io_speed |
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514 | }; |
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