1 | /* |
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2 | * ata.c |
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3 | * |
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4 | * ATA RTEMS driver. ATA driver is hardware independant implementation of |
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5 | * ATA-2 standart, working draft X3T10/0948D, revision 4c. ATA driver bases |
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6 | * on RTEMS IDE controller driver. |
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7 | * |
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8 | * Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia |
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9 | * Authors: Eugeny S. Mints <Eugeny.Mints@oktet.ru> |
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10 | * |
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11 | * The license and distribution terms for this file may be |
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12 | * found in the file LICENSE in this distribution or at |
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13 | * http://www.rtems.com/license/LICENSE. |
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14 | * |
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15 | * $Id$ |
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16 | * |
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17 | */ |
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18 | #include <errno.h> |
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19 | #include <rtems/chain.h> |
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20 | #include <assert.h> |
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21 | #include <string.h> /* for "memset" declaration */ |
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22 | |
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23 | #include <rtems/diskdevs.h> |
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24 | #include <rtems/blkdev.h> |
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25 | #include <libchip/ide_ctrl_io.h> |
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26 | #include <libchip/ide_ctrl_cfg.h> |
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27 | #include "ata_internal.h" |
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28 | #include <libchip/ata.h> |
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29 | /* #define DEBUG */ |
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30 | |
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31 | #ifdef DEBUG |
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32 | #include <stdio.h> |
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33 | #endif |
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34 | |
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35 | /* |
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36 | * FIXME: make this better... |
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37 | * find out, which exception model is used |
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38 | * assume, that all i386 BSPs use new exception handling |
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39 | * assume, that some PPC BSPs use new exception handling |
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40 | * assume, that all other BSPs use old exception handling |
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41 | */ |
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42 | #if defined(_OLD_EXCEPTIONS) || (!defined(__i386__) && !defined(__PPC__)) |
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43 | |
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44 | #define ATA_USE_OLD_EXCEPTIONS |
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45 | #endif |
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46 | |
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47 | #if !defined(ATA_USE_OLD_EXCEPTIONS) |
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48 | #include <bsp/irq.h> |
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49 | #define ATA_IRQ_CHAIN_MAX_CNT 4 /* support up to 4 ATA devices */ |
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50 | typedef struct { |
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51 | rtems_irq_number name; |
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52 | Chain_Control irq_chain; |
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53 | } ata_irq_chain_t; |
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54 | |
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55 | ata_irq_chain_t ata_irq_chain[ATA_IRQ_CHAIN_MAX_CNT]; |
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56 | int ata_irq_chain_cnt = 0; |
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57 | #endif |
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58 | |
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59 | #define SAFE |
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60 | #ifdef SAFE |
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61 | typedef rtems_mode preemption_key; |
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62 | |
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63 | #define DISABLE_PREEMPTION(key) \ |
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64 | do { \ |
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65 | rtems_task_mode(RTEMS_NO_PREEMPT, RTEMS_PREEMPT_MASK, &(key)); \ |
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66 | } while (0) |
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67 | |
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68 | #define ENABLE_PREEMPTION(key) \ |
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69 | do { \ |
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70 | rtems_mode temp; \ |
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71 | rtems_task_mode((key), RTEMS_PREEMPT_MASK, &temp); \ |
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72 | } while (0) |
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73 | |
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74 | #else |
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75 | |
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76 | typedef boolean preemption_key; |
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77 | |
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78 | #define DISABLE_PREEMPTION(key) \ |
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79 | do { \ |
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80 | (key) = _Thread_Executing->is_preemptible; \ |
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81 | _Thread_Executing->is_preemptible = 0; \ |
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82 | } while (0) |
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83 | |
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84 | #define ENABLE_PREEMPTION(key) \ |
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85 | do { \ |
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86 | _Thread_Executing->is_preemptible = (key); \ |
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87 | if (_Thread_Evaluate_mode()) \ |
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88 | _Thread_Dispatch(); \ |
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89 | } while (0) |
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90 | |
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91 | #endif |
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92 | |
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93 | /* FIXME: case if ATA device is FLASH device need more attention */ |
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94 | #undef ATA_DEV_IS_FLASH_DISK |
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95 | |
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96 | /* Block device request with a single buffer provided */ |
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97 | typedef struct blkdev_request1 { |
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98 | blkdev_request req; |
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99 | blkdev_sg_buffer sg[1]; |
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100 | } blkdev_request1; |
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101 | |
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102 | |
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103 | /* Array indexed by controllers minor number */ |
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104 | static ata_ide_ctrl_t ata_ide_ctrls[IDE_CTRL_MAX_MINOR_NUMBER]; |
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105 | |
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106 | /* |
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107 | * Mapping from ATA-minor numbers to |
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108 | * controller-minor and device on this controller. |
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109 | */ |
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110 | static ata_ide_dev_t ata_devs[2 * IDE_CTRL_MAX_MINOR_NUMBER]; |
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111 | static int ata_devs_number; |
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112 | |
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113 | /* Flag meaning that ATA driver has already been initialized */ |
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114 | static rtems_boolean ata_initialized = FALSE; |
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115 | |
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116 | |
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117 | /* task and queue used for asynchronous I/O operations */ |
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118 | static rtems_id ata_task_id; |
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119 | static rtems_id ata_queue_id; |
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120 | |
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121 | #if defined (ATA_USE_OLD_EXCEPTIONS) |
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122 | /* Mapping of interrupt vectors to devices */ |
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123 | static Chain_Control ata_int_vec[ATA_MAX_RTEMS_INT_VEC_NUMBER + 1]; |
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124 | #endif |
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125 | |
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126 | static void |
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127 | ata_process_request(rtems_device_minor_number ctrl_minor); |
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128 | |
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129 | static void |
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130 | ata_process_request_on_init_phase(rtems_device_minor_number ctrl_minor, |
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131 | ata_req_t *areq); |
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132 | |
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133 | static void |
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134 | ata_add_to_controller_queue(rtems_device_minor_number ctrl_minor, |
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135 | ata_req_t *areq); |
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136 | |
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137 | /* |
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138 | * read/write, open/close and ioctl are provided by general block device |
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139 | * driver. Only initialization and ata-specific ioctl are here. |
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140 | */ |
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141 | |
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142 | /* ata_io_data_request -- |
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143 | * Form read/write request for an ATA device and enqueue it to |
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144 | * IDE controller. |
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145 | * |
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146 | * PARAMETERS: |
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147 | * device - device identifier |
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148 | * req - read/write request from block device driver |
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149 | * |
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150 | * RETURNS: |
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151 | * RTEMS_SUCCESSFUL on success, or error code if |
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152 | * error occured |
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153 | */ |
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154 | static rtems_status_code |
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155 | ata_io_data_request(dev_t device, blkdev_request *req) |
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156 | { |
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157 | ata_req_t *areq; /* ATA request */ |
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158 | rtems_device_minor_number rel_minor; /* relative minor which indexes |
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159 | * ata_devs array |
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160 | */ |
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161 | rtems_device_minor_number ctrl_minor; |
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162 | uint8_t dev; |
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163 | |
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164 | rel_minor = (rtems_filesystem_dev_minor_t(device)) / |
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165 | ATA_MINOR_NUM_RESERVED_PER_ATA_DEVICE; |
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166 | |
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167 | /* get controller which serves the ATA device */ |
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168 | ctrl_minor = ata_devs[rel_minor].ctrl_minor; |
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169 | |
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170 | /* get ATA device identifier (0 or 1) */ |
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171 | dev = ata_devs[rel_minor].device; |
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172 | |
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173 | areq = malloc(sizeof(ata_req_t)); |
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174 | if (areq == NULL) |
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175 | { |
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176 | return RTEMS_NO_MEMORY; |
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177 | } |
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178 | |
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179 | areq->breq = req; |
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180 | areq->cnt = req->count; |
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181 | areq->cbuf = 0; |
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182 | areq->pos = 0; |
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183 | |
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184 | /* set up registers masks */ |
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185 | areq->regs.to_write = ATA_REGISTERS_POSITION; |
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186 | areq->regs.to_read = ATA_REGISTERS_VALUE(IDE_REGISTER_STATUS); |
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187 | |
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188 | /* choose device on the controller for which the command will be issued */ |
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189 | areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] = |
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190 | (dev << IDE_REGISTER_DEVICE_HEAD_DEV_POS); |
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191 | |
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192 | /* Find ATA command and its type */ |
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193 | if (ATA_DEV_INFO(ctrl_minor, dev).mode_active & ATA_MODES_DMA) |
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194 | { |
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195 | /* XXX: never has been tested */ |
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196 | areq->type = ATA_COMMAND_TYPE_DMA; |
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197 | if (req->req == BLKDEV_REQ_READ) |
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198 | areq->regs.regs[IDE_REGISTER_COMMAND] = ATA_COMMAND_READ_DMA; |
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199 | else |
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200 | areq->regs.regs[IDE_REGISTER_COMMAND] = ATA_COMMAND_WRITE_DMA; |
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201 | } |
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202 | else |
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203 | { |
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204 | if (req->req == BLKDEV_REQ_READ) |
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205 | { |
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206 | areq->type = ATA_COMMAND_TYPE_PIO_IN; |
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207 | |
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208 | /* |
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209 | * choose command to issue: if the number of blocks to be |
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210 | * exchanged is greater then 1 and for ATA command READ MULTIPLE |
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211 | * data block consists of more then 1 sector choose READ MULTIPLE |
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212 | * otherwise READ SECTORS |
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213 | */ |
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214 | areq->regs.regs[IDE_REGISTER_COMMAND] = |
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215 | ((ATA_DEV_INFO(ctrl_minor, dev).max_multiple) && |
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216 | (req->count > 1) && |
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217 | (ATA_DEV_INFO(ctrl_minor, dev).current_multiple > 1)) ? |
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218 | ATA_COMMAND_READ_MULTIPLE : |
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219 | ATA_COMMAND_READ_SECTORS; |
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220 | } |
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221 | else |
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222 | { |
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223 | areq->type = ATA_COMMAND_TYPE_PIO_OUT; |
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224 | |
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225 | /* |
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226 | * choose command to issue: if the number of blocks to be |
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227 | * exchanged is greater then 1 and for ATA command WRITE MULTIPLE |
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228 | * data block consists of more then 1 sector choose WRITE MULTIPLE |
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229 | * otherwise WRITE SECTORS |
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230 | */ |
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231 | areq->regs.regs[IDE_REGISTER_COMMAND] = |
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232 | ((ATA_DEV_INFO(ctrl_minor, dev).max_multiple) && |
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233 | (req->count > 1) && |
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234 | (ATA_DEV_INFO(ctrl_minor, dev).current_multiple > 1)) ? |
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235 | ATA_COMMAND_WRITE_MULTIPLE : |
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236 | ATA_COMMAND_WRITE_SECTORS; |
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237 | } |
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238 | } |
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239 | |
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240 | /* |
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241 | * Fill position registers |
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242 | */ |
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243 | if (ATA_DEV_INFO(ctrl_minor, dev).lba_avaible) |
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244 | { |
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245 | areq->regs.regs[IDE_REGISTER_LBA0] = (uint8_t)req->start; |
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246 | areq->regs.regs[IDE_REGISTER_LBA1] = (uint8_t)(req->start >> 8); |
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247 | areq->regs.regs[IDE_REGISTER_LBA2] = (uint8_t)(req->start >> 16); |
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248 | areq->regs.regs[IDE_REGISTER_LBA3] |= (uint8_t) (req->start >> 24); |
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249 | areq->regs.regs[IDE_REGISTER_LBA3] |= IDE_REGISTER_LBA3_L; |
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250 | } |
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251 | else |
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252 | { |
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253 | uint32_t count = req->start; |
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254 | |
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255 | areq->regs.regs[IDE_REGISTER_SECTOR_NUMBER] = |
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256 | (count % ATA_DEV_INFO(ctrl_minor, dev).sectors) + 1; |
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257 | |
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258 | /* now count = number of tracks: */ |
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259 | count /= ATA_DEV_INFO(ctrl_minor, dev).sectors; |
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260 | areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] |= |
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261 | (count / ATA_DEV_INFO(ctrl_minor, dev).cylinders); |
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262 | |
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263 | /* now count = number of cylinders */ |
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264 | count %= ATA_DEV_INFO(ctrl_minor, dev).cylinders; |
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265 | areq->regs.regs[IDE_REGISTER_CYLINDER_LOW] = (uint8_t)count; |
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266 | areq->regs.regs[IDE_REGISTER_CYLINDER_HIGH] = (uint8_t)(count >> 8); |
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267 | areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] &= |
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268 | ~IDE_REGISTER_DEVICE_HEAD_L; |
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269 | } |
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270 | |
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271 | /* fill sector count register */ |
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272 | areq->regs.regs[IDE_REGISTER_SECTOR_COUNT] = areq->breq->count; |
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273 | |
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274 | /* add request to the queue of awaiting requests to the controller */ |
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275 | ata_add_to_controller_queue(ctrl_minor, areq); |
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276 | |
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277 | return RTEMS_SUCCESSFUL; |
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278 | } |
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279 | |
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280 | /* ata_non_data_request -- |
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281 | * Form and serve request of NON DATA type for an ATA device. |
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282 | * Processing of NON DATA request is SYNChronous operation. |
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283 | * |
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284 | * PARAMETERS: |
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285 | * device - device identifier |
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286 | * cmd - command |
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287 | * argp - arguments for command |
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288 | * |
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289 | * RETURNS: |
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290 | * RTEMS_SUCCESSFUL on success, or error code if |
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291 | * error occured |
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292 | */ |
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293 | static rtems_status_code |
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294 | ata_non_data_request(dev_t device, int cmd, void *argp) |
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295 | { |
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296 | rtems_status_code rc; |
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297 | ata_req_t *areq; /* ATA request */ |
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298 | rtems_device_minor_number rel_minor; /* relative minor which indexes |
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299 | * ata_devs array |
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300 | */ |
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301 | rtems_device_minor_number ctrl_minor; |
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302 | uint8_t dev; |
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303 | ata_queue_msg_t msg; |
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304 | |
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305 | rel_minor = (rtems_filesystem_dev_minor_t(device)) / |
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306 | ATA_MINOR_NUM_RESERVED_PER_ATA_DEVICE; |
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307 | |
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308 | /* get controller which serves the ATA device */ |
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309 | ctrl_minor = ata_devs[rel_minor].ctrl_minor; |
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310 | |
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311 | /* get ATA device identifier (0 or 1) */ |
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312 | dev = ata_devs[rel_minor].device; |
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313 | |
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314 | /* form the request */ |
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315 | areq = malloc(sizeof(ata_req_t)); |
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316 | if (areq == NULL) |
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317 | { |
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318 | return RTEMS_NO_MEMORY; |
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319 | } |
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320 | memset(areq, 0, sizeof(ata_req_t)); |
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321 | |
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322 | areq->type = ATA_COMMAND_TYPE_NON_DATA; |
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323 | areq->regs.to_write = ATA_REGISTERS_VALUE(IDE_REGISTER_COMMAND); |
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324 | areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] |= |
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325 | (dev << IDE_REGISTER_DEVICE_HEAD_DEV_POS); |
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326 | areq->breq = NULL; |
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327 | areq->regs.to_read = ATA_REGISTERS_VALUE(IDE_REGISTER_ERROR); |
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328 | |
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329 | /* |
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330 | * depending on command fill command register and additional registers |
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331 | * which are needed for command execution |
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332 | */ |
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333 | switch(cmd) |
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334 | { |
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335 | case ATAIO_SET_MULTIPLE_MODE: |
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336 | areq->regs.regs[IDE_REGISTER_COMMAND] = |
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337 | ATA_COMMAND_SET_MULTIPLE_MODE; |
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338 | areq->regs.to_write |= |
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339 | ATA_REGISTERS_VALUE(IDE_REGISTER_SECTOR_COUNT); |
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340 | areq->regs.regs[IDE_REGISTER_SECTOR_COUNT] = *(uint8_t*)argp; |
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341 | break; |
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342 | |
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343 | default: |
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344 | free(areq); |
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345 | return RTEMS_INVALID_NUMBER; |
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346 | break; |
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347 | } |
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348 | |
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349 | rc = rtems_semaphore_create(rtems_build_name('I', 'D', 'E', 'S'), |
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350 | 0, |
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351 | RTEMS_FIFO | RTEMS_COUNTING_SEMAPHORE | |
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352 | RTEMS_NO_INHERIT_PRIORITY | |
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353 | RTEMS_NO_PRIORITY_CEILING | RTEMS_LOCAL, |
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354 | 0, |
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355 | &(areq->sema)); |
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356 | if (rc != RTEMS_SUCCESSFUL) |
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357 | { |
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358 | free(areq); |
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359 | return rc; |
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360 | } |
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361 | |
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362 | ata_add_to_controller_queue(ctrl_minor, areq); |
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363 | |
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364 | /* wait for request processing... */ |
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365 | rc = rtems_semaphore_obtain(areq->sema, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
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366 | if (rc != RTEMS_SUCCESSFUL) |
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367 | { |
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368 | free(areq); |
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369 | return rc; |
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370 | } |
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371 | |
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372 | rtems_semaphore_delete(areq->sema); |
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373 | |
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374 | /* |
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375 | * if no error occurred and if necessary, update internal ata driver data |
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376 | * structures to reflect changes (in device configuration, for example) |
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377 | */ |
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378 | if (areq->status == RTEMS_SUCCESSFUL) |
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379 | { |
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380 | switch(cmd) |
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381 | { |
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382 | case ATAIO_SET_MULTIPLE_MODE: |
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383 | ATA_DEV_INFO(ctrl_minor, dev).current_multiple = |
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384 | *(uint8_t*)argp; |
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385 | break; |
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386 | |
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387 | default: |
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388 | rc = RTEMS_INVALID_NUMBER; |
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389 | break; |
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390 | } |
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391 | } |
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392 | else |
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393 | { |
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394 | /* XXX: should be correct error processing: for ex, may be |
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395 | * ABRT and then we should return RTEMS_NOT_IMPLEMENTED |
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396 | */ |
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397 | rc = RTEMS_IO_ERROR; |
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398 | } |
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399 | |
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400 | /* tell ata driver that controller ready to serve next request */ |
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401 | ATA_SEND_EVT(msg, ATA_MSG_SUCCESS_EVT, ctrl_minor, 0); |
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402 | |
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403 | return rc; |
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404 | } |
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405 | |
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406 | /* ata_process_request -- |
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407 | * Get first request from controller's queue and process it. |
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408 | * |
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409 | * PARAMETERS: |
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410 | * ctrl_minor - controller identifier |
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411 | * |
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412 | * RETURNS: |
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413 | * NONE |
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414 | */ |
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415 | static void |
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416 | ata_process_request(rtems_device_minor_number ctrl_minor) |
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417 | { |
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418 | ata_req_t *areq; |
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419 | uint16_t byte; /* emphasize that only 8 low bits is meaningful */ |
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420 | ata_queue_msg_t msg; |
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421 | uint8_t i, dev; |
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422 | uint16_t val; |
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423 | uint16_t data_bs; /* the number of 512-bytes sectors in one |
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424 | * data block |
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425 | */ |
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426 | ISR_Level level; |
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427 | |
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428 | /* if no requests to controller then do nothing */ |
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429 | if (Chain_Is_empty(&ata_ide_ctrls[ctrl_minor].reqs)) |
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430 | return; |
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431 | |
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432 | /* get first request in the controller's queue */ |
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433 | _ISR_Disable(level); |
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434 | areq = (ata_req_t *)(ata_ide_ctrls[ctrl_minor].reqs.first); |
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435 | _ISR_Enable(level); |
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436 | |
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437 | /* get ATA device identifier (0 or 1) */ |
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438 | dev = areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] & |
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439 | IDE_REGISTER_DEVICE_HEAD_DEV; |
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440 | |
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441 | /* get data block size */ |
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442 | data_bs = ATA_DEV_INFO(ctrl_minor, dev).current_multiple ? |
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443 | ATA_DEV_INFO(ctrl_minor, dev).current_multiple : 1; |
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444 | |
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445 | /* execute device select protocol */ |
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446 | ide_controller_write_register(ctrl_minor, IDE_REGISTER_DEVICE_HEAD, |
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447 | areq->regs.regs[IDE_REGISTER_DEVICE_HEAD]); |
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448 | |
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449 | do { |
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450 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, &byte); |
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451 | } while ((byte & IDE_REGISTER_STATUS_BSY) || |
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452 | (!(byte & IDE_REGISTER_STATUS_DRDY))); |
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453 | |
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454 | /* fill in all necessary registers on the controller */ |
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455 | for (i=0; i< ATA_MAX_CMD_REG_OFFSET; i++) |
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456 | { |
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457 | uint32_t reg = (1 << i); |
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458 | if (areq->regs.to_write & reg) |
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459 | ide_controller_write_register(ctrl_minor, i, areq->regs.regs[i]); |
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460 | } |
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461 | |
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462 | /* continue to execute ATA protocols depending on type of request */ |
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463 | if (areq->type == ATA_COMMAND_TYPE_PIO_OUT) |
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464 | { |
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465 | do { |
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466 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, |
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467 | &byte); |
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468 | } while (byte & IDE_REGISTER_STATUS_BSY); |
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469 | |
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470 | if (byte & IDE_REGISTER_STATUS_DRQ) |
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471 | { |
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472 | ide_controller_write_data_block( |
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473 | ctrl_minor, |
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474 | MIN(data_bs, areq->cnt) * ATA_SECTOR_SIZE, |
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475 | areq->breq->bufs, &areq->cbuf, |
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476 | &areq->pos); |
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477 | areq->cnt -= MIN(data_bs, areq->cnt); |
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478 | } |
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479 | else |
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480 | { |
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481 | if (IDE_Controller_Table[ctrl_minor].int_driven == 0) |
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482 | { |
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483 | ide_controller_read_register( |
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484 | ctrl_minor, |
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485 | IDE_REGISTER_ALTERNATE_STATUS_OFFSET, |
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486 | &val); |
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487 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, |
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488 | &val); |
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489 | |
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490 | ATA_SEND_EVT(msg, ATA_MSG_ERROR_EVT, ctrl_minor, |
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491 | RTEMS_IO_ERROR); |
---|
492 | } |
---|
493 | } |
---|
494 | } |
---|
495 | |
---|
496 | if (IDE_Controller_Table[ctrl_minor].int_driven == 0) |
---|
497 | { |
---|
498 | do { |
---|
499 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, |
---|
500 | &byte); |
---|
501 | } while (byte & IDE_REGISTER_STATUS_BSY); |
---|
502 | |
---|
503 | ATA_SEND_EVT(msg, ATA_MSG_GEN_EVT, ctrl_minor, 0); |
---|
504 | } |
---|
505 | } |
---|
506 | |
---|
507 | /* ata_request_done -- |
---|
508 | * Extract request from controller queue, execute callback if necessary |
---|
509 | * and process next request for the controller. |
---|
510 | * |
---|
511 | * PARAMETERS: |
---|
512 | * areq - ATA request |
---|
513 | * ctrl_minor - controller identifier |
---|
514 | * status - status with which request has been done |
---|
515 | * error - error, if status != RTEMS_SUCCESSFUL |
---|
516 | * |
---|
517 | * RETURNS: |
---|
518 | * NONE |
---|
519 | */ |
---|
520 | static inline void |
---|
521 | ata_request_done(ata_req_t *areq, rtems_device_minor_number ctrl_minor, |
---|
522 | rtems_status_code status, int error) |
---|
523 | { |
---|
524 | preemption_key key; |
---|
525 | |
---|
526 | assert(areq); |
---|
527 | |
---|
528 | DISABLE_PREEMPTION(key); |
---|
529 | ATA_EXEC_CALLBACK(areq, status, error); |
---|
530 | Chain_Extract(&areq->link); |
---|
531 | |
---|
532 | if (!Chain_Is_empty(&ata_ide_ctrls[ctrl_minor].reqs)) |
---|
533 | { |
---|
534 | ENABLE_PREEMPTION(key); |
---|
535 | free(areq); |
---|
536 | ata_process_request(ctrl_minor); |
---|
537 | return; |
---|
538 | } |
---|
539 | ENABLE_PREEMPTION(key); |
---|
540 | free(areq); |
---|
541 | } |
---|
542 | |
---|
543 | /* ata_non_data_request_done -- |
---|
544 | * Set up request status and release request's semaphore. |
---|
545 | * |
---|
546 | * PARAMETERS: |
---|
547 | * areq - ATA request |
---|
548 | * ctrl_minor - controller identifier |
---|
549 | * status - status with which request has been done |
---|
550 | * error - error, if status != RTEMS_SUCCESSFUL |
---|
551 | * |
---|
552 | * RETURNS: |
---|
553 | * NONE |
---|
554 | */ |
---|
555 | static inline void |
---|
556 | ata_non_data_request_done(ata_req_t *areq, |
---|
557 | rtems_device_minor_number ctrl_minor, |
---|
558 | rtems_status_code status, int error) |
---|
559 | { |
---|
560 | areq->status = status; |
---|
561 | areq->error = error; |
---|
562 | rtems_semaphore_release(areq->sema); |
---|
563 | } |
---|
564 | |
---|
565 | |
---|
566 | /* ata_add_to_controller_queue -- |
---|
567 | * Add request to the controller's queue. |
---|
568 | * |
---|
569 | * PARAMETERS: |
---|
570 | * ctrl_minor - controller identifier |
---|
571 | * areq - ATA request |
---|
572 | * |
---|
573 | * RETURNS: |
---|
574 | * NONE |
---|
575 | */ |
---|
576 | static void |
---|
577 | ata_add_to_controller_queue(rtems_device_minor_number ctrl_minor, |
---|
578 | ata_req_t *areq) |
---|
579 | { |
---|
580 | Chain_Append(&ata_ide_ctrls[ctrl_minor].reqs, &areq->link); |
---|
581 | if (Chain_Has_only_one_node(&ata_ide_ctrls[ctrl_minor].reqs)) |
---|
582 | { |
---|
583 | |
---|
584 | ata_queue_msg_t msg; |
---|
585 | |
---|
586 | #ifdef DEBUG |
---|
587 | uint16_t val; |
---|
588 | /* |
---|
589 | * read IDE_REGISTER_ALTERNATE_STATUS instead IDE_REGISTER_STATUS |
---|
590 | * to prevent clearing of pending interrupt |
---|
591 | */ |
---|
592 | ide_controller_read_register(ctrl_minor, |
---|
593 | IDE_REGISTER_ALTERNATE_STATUS, |
---|
594 | &val); |
---|
595 | if (val & IDE_REGISTER_STATUS_BSY) |
---|
596 | return; |
---|
597 | #endif |
---|
598 | ATA_SEND_EVT(msg, ATA_MSG_PROCESS_NEXT_EVT, ctrl_minor, 0); |
---|
599 | } |
---|
600 | } |
---|
601 | |
---|
602 | |
---|
603 | /* ata_interrupt_handler -- |
---|
604 | * ATA driver interrrupt handler. If interrrupt happend it mapped it to |
---|
605 | * controller (controllerS, if a number of controllers share one int line) |
---|
606 | * and generates ATA event(s). |
---|
607 | * |
---|
608 | * PARAMETERS: |
---|
609 | * vec - interrupt vector |
---|
610 | * |
---|
611 | * RETURNS: |
---|
612 | * NONE |
---|
613 | */ |
---|
614 | #if defined(ATA_USE_OLD_EXCEPTIONS) |
---|
615 | rtems_isr |
---|
616 | ata_interrupt_handler(rtems_vector_number vec) |
---|
617 | { |
---|
618 | Chain_Node *the_node = ((Chain_Control *)(&ata_int_vec[vec]))->first; |
---|
619 | ata_queue_msg_t msg; |
---|
620 | uint16_t byte; /* emphasize that only 8 low bits is meaningful */ |
---|
621 | |
---|
622 | for ( ; !Chain_Is_tail(&ata_int_vec[vec], the_node) ; ) |
---|
623 | { |
---|
624 | /* if (1) - is temporary hack - currently I don't know how to identify |
---|
625 | * controller which asserted interrupt if few controllers share one |
---|
626 | * interrupt line |
---|
627 | */ |
---|
628 | if (1) |
---|
629 | { |
---|
630 | msg.ctrl_minor = ((ata_int_st_t *)the_node)->ctrl_minor; |
---|
631 | ide_controller_read_register(msg.ctrl_minor, IDE_REGISTER_STATUS, |
---|
632 | &byte); |
---|
633 | ATA_SEND_EVT(msg, ATA_MSG_GEN_EVT, msg.ctrl_minor, 0); |
---|
634 | } |
---|
635 | the_node = the_node->next; |
---|
636 | } |
---|
637 | } |
---|
638 | #else |
---|
639 | |
---|
640 | void ata_interrupt_handler(rtems_irq_hdl_param handle) |
---|
641 | { |
---|
642 | int ata_irq_chain_index = (int) handle; |
---|
643 | Chain_Node *the_node = |
---|
644 | ata_irq_chain[ata_irq_chain_index].irq_chain.last; |
---|
645 | ata_queue_msg_t msg; |
---|
646 | uint16_t byte; /* emphasize that only 8 low bits is meaningful */ |
---|
647 | |
---|
648 | |
---|
649 | for ( ; !Chain_Is_tail(&ata_irq_chain[ata_irq_chain_index].irq_chain, |
---|
650 | the_node) ; ) |
---|
651 | { |
---|
652 | /* if (1) - is temporary hack - currently I don't know how to identify |
---|
653 | * controller which asserted interrupt if few controllers share one |
---|
654 | * interrupt line |
---|
655 | */ |
---|
656 | if (1) |
---|
657 | { |
---|
658 | msg.ctrl_minor = ((ata_int_st_t *)the_node)->ctrl_minor; |
---|
659 | ide_controller_read_register(msg.ctrl_minor, IDE_REGISTER_STATUS, |
---|
660 | &byte); |
---|
661 | ATA_SEND_EVT(msg, ATA_MSG_GEN_EVT, msg.ctrl_minor, 0); |
---|
662 | } |
---|
663 | the_node = the_node->next; |
---|
664 | } |
---|
665 | } |
---|
666 | |
---|
667 | void ata_interrupt_on(const rtems_irq_connect_data *ptr) |
---|
668 | { |
---|
669 | |
---|
670 | /* enable ATA device interrupt */ |
---|
671 | ide_controller_write_register(0, |
---|
672 | IDE_REGISTER_DEVICE_CONTROL_OFFSET, |
---|
673 | 0x00 |
---|
674 | ); |
---|
675 | } |
---|
676 | |
---|
677 | |
---|
678 | void ata_interrupt_off(const rtems_irq_connect_data *ptr) |
---|
679 | { |
---|
680 | |
---|
681 | /* disable ATA device interrupt */ |
---|
682 | ide_controller_write_register(0, |
---|
683 | IDE_REGISTER_DEVICE_CONTROL_OFFSET, |
---|
684 | IDE_REGISTER_DEVICE_CONTROL_nIEN |
---|
685 | ); |
---|
686 | } |
---|
687 | |
---|
688 | |
---|
689 | int ata_interrupt_isOn(const rtems_irq_connect_data *ptr) |
---|
690 | { |
---|
691 | uint16_t byte; /* emphasize that only 8 low bits is meaningful */ |
---|
692 | |
---|
693 | /* return int. status od ATA device */ |
---|
694 | ide_controller_read_register(0, |
---|
695 | IDE_REGISTER_DEVICE_CONTROL_OFFSET, |
---|
696 | &byte |
---|
697 | ); |
---|
698 | |
---|
699 | return !(byte & IDE_REGISTER_DEVICE_CONTROL_nIEN); |
---|
700 | } |
---|
701 | |
---|
702 | |
---|
703 | static rtems_irq_connect_data ata_irq_data = |
---|
704 | { |
---|
705 | |
---|
706 | 0, /* filled out before use... */ |
---|
707 | (rtems_irq_hdl) ata_interrupt_handler,/* filled out before use... */ |
---|
708 | (rtems_irq_hdl_param) NULL, |
---|
709 | (rtems_irq_enable) ata_interrupt_on, |
---|
710 | (rtems_irq_disable) ata_interrupt_off, |
---|
711 | (rtems_irq_is_enabled) ata_interrupt_isOn |
---|
712 | }; |
---|
713 | #endif |
---|
714 | |
---|
715 | /* ata_pio_in_protocol -- |
---|
716 | * ATA PIO_IN protocol implementation, see specification |
---|
717 | * |
---|
718 | * PARAMETERS: |
---|
719 | * ctrl_minor - controller identifier |
---|
720 | * areq - ATA request |
---|
721 | * |
---|
722 | * RETURNS: |
---|
723 | * NONE |
---|
724 | */ |
---|
725 | static inline void |
---|
726 | ata_pio_in_protocol(rtems_device_minor_number ctrl_minor, ata_req_t *areq) |
---|
727 | { |
---|
728 | uint16_t bs, val; |
---|
729 | uint8_t dev; |
---|
730 | uint32_t min_val; |
---|
731 | ata_queue_msg_t msg; |
---|
732 | |
---|
733 | dev = areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] & |
---|
734 | IDE_REGISTER_DEVICE_HEAD_DEV; |
---|
735 | |
---|
736 | bs = ATA_DEV_INFO(ctrl_minor, dev).current_multiple ? |
---|
737 | ATA_DEV_INFO(ctrl_minor, dev).current_multiple : 1; |
---|
738 | min_val = MIN(bs, areq->cnt); |
---|
739 | |
---|
740 | ide_controller_read_data_block(ctrl_minor, min_val * ATA_SECTOR_SIZE, |
---|
741 | areq->breq->bufs, &areq->cbuf, &areq->pos); |
---|
742 | |
---|
743 | areq->cnt -= min_val; |
---|
744 | if (areq->cnt == 0) |
---|
745 | { |
---|
746 | ata_request_done(areq, ctrl_minor, RTEMS_SUCCESSFUL, RTEMS_SUCCESSFUL); |
---|
747 | } |
---|
748 | else if (IDE_Controller_Table[ctrl_minor].int_driven == 0) |
---|
749 | { |
---|
750 | do { |
---|
751 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, &val); |
---|
752 | } while (val & IDE_REGISTER_STATUS_BSY); |
---|
753 | |
---|
754 | ATA_SEND_EVT(msg, ATA_MSG_GEN_EVT, ctrl_minor, 0); |
---|
755 | } |
---|
756 | } |
---|
757 | |
---|
758 | /* ata_pio_out_protocol -- |
---|
759 | * ATA PIO_OUT protocol implementation, see specification |
---|
760 | * |
---|
761 | * PARAMETERS: |
---|
762 | * ctrl_minor - controller identifier |
---|
763 | * areq - ATA request |
---|
764 | * |
---|
765 | * RETURNS: |
---|
766 | * NONE |
---|
767 | */ |
---|
768 | static inline void |
---|
769 | ata_pio_out_protocol(rtems_device_minor_number ctrl_minor, ata_req_t *areq) |
---|
770 | { |
---|
771 | uint16_t bs, val; |
---|
772 | uint8_t dev; |
---|
773 | uint32_t min_val; |
---|
774 | ata_queue_msg_t msg; |
---|
775 | |
---|
776 | dev = areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] & |
---|
777 | IDE_REGISTER_DEVICE_HEAD_DEV; |
---|
778 | |
---|
779 | bs = ATA_DEV_INFO(ctrl_minor, dev).current_multiple ? |
---|
780 | ATA_DEV_INFO(ctrl_minor, dev).current_multiple : 1; |
---|
781 | |
---|
782 | min_val = MIN(bs, areq->cnt); |
---|
783 | |
---|
784 | if (areq->cnt == 0) |
---|
785 | { |
---|
786 | ata_request_done(areq, ctrl_minor, RTEMS_SUCCESSFUL, RTEMS_SUCCESSFUL); |
---|
787 | } |
---|
788 | else |
---|
789 | { |
---|
790 | ide_controller_write_data_block(ctrl_minor, min_val * ATA_SECTOR_SIZE, |
---|
791 | areq->breq->bufs, &areq->cbuf, |
---|
792 | &areq->pos); |
---|
793 | areq->cnt -= min_val; |
---|
794 | if (IDE_Controller_Table[ctrl_minor].int_driven == 0) |
---|
795 | { |
---|
796 | do { |
---|
797 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, |
---|
798 | &val); |
---|
799 | } while (val & IDE_REGISTER_STATUS_BSY); |
---|
800 | |
---|
801 | ATA_SEND_EVT(msg, ATA_MSG_GEN_EVT, ctrl_minor, 0); |
---|
802 | } |
---|
803 | } |
---|
804 | } |
---|
805 | |
---|
806 | /* ata_queue_task -- |
---|
807 | * Task which manages ATA driver events queue. |
---|
808 | * |
---|
809 | * PARAMETERS: |
---|
810 | * arg - ignored |
---|
811 | * |
---|
812 | * RETURNS: |
---|
813 | * NONE |
---|
814 | * |
---|
815 | * NOTES: |
---|
816 | * should be non-preemptive |
---|
817 | */ |
---|
818 | static rtems_task |
---|
819 | ata_queue_task(rtems_task_argument arg) |
---|
820 | { |
---|
821 | ata_queue_msg_t msg; |
---|
822 | uint32_t size; |
---|
823 | ata_req_t *areq; |
---|
824 | rtems_device_minor_number ctrl_minor; |
---|
825 | uint16_t val; |
---|
826 | uint16_t val1; |
---|
827 | rtems_status_code rc; |
---|
828 | ISR_Level level; |
---|
829 | |
---|
830 | while (1) |
---|
831 | { |
---|
832 | /* get event which has happend */ |
---|
833 | rc = rtems_message_queue_receive(ata_queue_id, &msg, &size, RTEMS_WAIT, |
---|
834 | RTEMS_NO_TIMEOUT); |
---|
835 | if (rc != RTEMS_SUCCESSFUL) |
---|
836 | rtems_fatal_error_occurred(RTEMS_INTERNAL_ERROR); |
---|
837 | |
---|
838 | /* get controller on which event has happend */ |
---|
839 | ctrl_minor = msg.ctrl_minor; |
---|
840 | |
---|
841 | /* get current request to the controller */ |
---|
842 | _ISR_Disable(level); |
---|
843 | areq = (ata_req_t *)(ata_ide_ctrls[ctrl_minor].reqs.first); |
---|
844 | _ISR_Enable(level); |
---|
845 | |
---|
846 | switch(msg.type) |
---|
847 | { |
---|
848 | case ATA_MSG_PROCESS_NEXT_EVT: |
---|
849 | /* process next request in the controller queue */ |
---|
850 | ata_process_request(ctrl_minor); |
---|
851 | break; |
---|
852 | |
---|
853 | case ATA_MSG_SUCCESS_EVT: |
---|
854 | /* |
---|
855 | * finish processing of current request with successful |
---|
856 | * status and start processing of the next request in the |
---|
857 | * controller queue |
---|
858 | */ |
---|
859 | ata_request_done(areq, ctrl_minor, RTEMS_SUCCESSFUL, |
---|
860 | msg.error); |
---|
861 | break; |
---|
862 | |
---|
863 | case ATA_MSG_ERROR_EVT: |
---|
864 | /* |
---|
865 | * finish processing of current request with error |
---|
866 | * status and start processing of the next request in the |
---|
867 | * controller queue |
---|
868 | */ |
---|
869 | ata_request_done(areq, ctrl_minor, RTEMS_UNSATISFIED, |
---|
870 | msg.error); |
---|
871 | break; |
---|
872 | |
---|
873 | case ATA_MSG_GEN_EVT: |
---|
874 | /* |
---|
875 | * continue processing of the current request to the |
---|
876 | * controller according to current request state and |
---|
877 | * ATA protocol |
---|
878 | */ |
---|
879 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, |
---|
880 | &val); |
---|
881 | /* process error case */ |
---|
882 | if (val & IDE_REGISTER_STATUS_ERR) |
---|
883 | { |
---|
884 | ide_controller_read_register(ctrl_minor, |
---|
885 | IDE_REGISTER_ERROR, |
---|
886 | &val); |
---|
887 | if (areq->type == ATA_COMMAND_TYPE_NON_DATA) |
---|
888 | ata_non_data_request_done(areq, ctrl_minor, |
---|
889 | RTEMS_UNSATISFIED, |
---|
890 | RTEMS_IO_ERROR); |
---|
891 | else |
---|
892 | ata_request_done(areq, ctrl_minor, RTEMS_UNSATISFIED, |
---|
893 | RTEMS_IO_ERROR); |
---|
894 | break; |
---|
895 | } |
---|
896 | |
---|
897 | switch(areq->type) |
---|
898 | { |
---|
899 | case ATA_COMMAND_TYPE_PIO_IN: |
---|
900 | ata_pio_in_protocol(ctrl_minor, areq); |
---|
901 | break; |
---|
902 | |
---|
903 | case ATA_COMMAND_TYPE_PIO_OUT: |
---|
904 | ata_pio_out_protocol(ctrl_minor, areq); |
---|
905 | break; |
---|
906 | |
---|
907 | case ATA_COMMAND_TYPE_NON_DATA: |
---|
908 | ide_controller_read_register(ctrl_minor, |
---|
909 | IDE_REGISTER_ERROR, |
---|
910 | &val1); |
---|
911 | ata_non_data_request_done(areq, ctrl_minor, |
---|
912 | RTEMS_SUCCESSFUL, |
---|
913 | val1); |
---|
914 | break; |
---|
915 | |
---|
916 | default: |
---|
917 | #ifdef DEBUG |
---|
918 | printf("ata_queue_task: non-supported command type\n"); |
---|
919 | #endif |
---|
920 | ata_request_done(areq, ctrl_minor, |
---|
921 | RTEMS_UNSATISFIED, |
---|
922 | RTEMS_NOT_IMPLEMENTED); |
---|
923 | break; |
---|
924 | } |
---|
925 | break; |
---|
926 | |
---|
927 | default: |
---|
928 | rtems_fatal_error_occurred(RTEMS_INTERNAL_ERROR); |
---|
929 | break; |
---|
930 | } |
---|
931 | } |
---|
932 | } |
---|
933 | |
---|
934 | /* ata_ioctl -- |
---|
935 | * ATA driver ioctl interface. |
---|
936 | * |
---|
937 | * PARAMETERS: |
---|
938 | * device - device identifier |
---|
939 | * cmd - command |
---|
940 | * argp - arguments |
---|
941 | * |
---|
942 | * RETURNS: |
---|
943 | * depend on 'cmd' |
---|
944 | */ |
---|
945 | int |
---|
946 | ata_ioctl(dev_t device, int cmd, void *argp) |
---|
947 | { |
---|
948 | rtems_status_code status; |
---|
949 | rtems_device_minor_number rel_minor; |
---|
950 | |
---|
951 | rel_minor = (rtems_filesystem_dev_minor_t(device)) / |
---|
952 | ATA_MINOR_NUM_RESERVED_PER_ATA_DEVICE; |
---|
953 | |
---|
954 | /* |
---|
955 | * in most cases this means that device 'device' is not an registred ATA |
---|
956 | * device |
---|
957 | */ |
---|
958 | if (ata_devs[rel_minor].device == ATA_UNDEFINED_VALUE) |
---|
959 | { |
---|
960 | errno = ENODEV; |
---|
961 | return -1; |
---|
962 | } |
---|
963 | |
---|
964 | switch (cmd) |
---|
965 | { |
---|
966 | case BLKIO_REQUEST: |
---|
967 | status = ata_io_data_request(device, (blkdev_request *)argp); |
---|
968 | break; |
---|
969 | |
---|
970 | case ATAIO_SET_MULTIPLE_MODE: |
---|
971 | status = ata_non_data_request(device, cmd, argp); |
---|
972 | break; |
---|
973 | |
---|
974 | default: |
---|
975 | errno = EBADRQC; |
---|
976 | return -1; |
---|
977 | break; |
---|
978 | } |
---|
979 | |
---|
980 | if (status != RTEMS_SUCCESSFUL) |
---|
981 | { |
---|
982 | errno = EIO; |
---|
983 | return -1; |
---|
984 | } |
---|
985 | return 0; |
---|
986 | } |
---|
987 | |
---|
988 | /* |
---|
989 | * ata_initialize -- |
---|
990 | * Initializes all ATA devices found on initialized IDE controllers. |
---|
991 | * |
---|
992 | * PARAMETERS: |
---|
993 | * major - device major number |
---|
994 | * minor - device minor number |
---|
995 | * args - arguments |
---|
996 | * |
---|
997 | * RETURNS: |
---|
998 | * RTEMS_SUCCESSFUL on success, or error code if |
---|
999 | * error occured |
---|
1000 | */ |
---|
1001 | rtems_device_driver |
---|
1002 | ata_initialize(rtems_device_major_number major, |
---|
1003 | rtems_device_minor_number minor_arg, |
---|
1004 | void *args) |
---|
1005 | { |
---|
1006 | uint32_t ctrl_minor; |
---|
1007 | rtems_status_code status; |
---|
1008 | ata_req_t areq; |
---|
1009 | blkdev_request1 breq; |
---|
1010 | uint8_t i, dev = 0; |
---|
1011 | uint16_t *buffer; |
---|
1012 | uint16_t ec; |
---|
1013 | char name[ATA_MAX_NAME_LENGTH]; |
---|
1014 | dev_t device; |
---|
1015 | ata_int_st_t *int_st; |
---|
1016 | |
---|
1017 | #if defined(ATA_USE_OLD_EXCEPTIONS) |
---|
1018 | rtems_isr_entry old_isr; |
---|
1019 | #else |
---|
1020 | int ata_irq_chain_use; |
---|
1021 | #endif |
---|
1022 | |
---|
1023 | if (ata_initialized) |
---|
1024 | return RTEMS_SUCCESSFUL; |
---|
1025 | |
---|
1026 | /* initialization of disk devices library */ |
---|
1027 | status = rtems_disk_io_initialize(); |
---|
1028 | if (status != RTEMS_SUCCESSFUL) |
---|
1029 | return status; |
---|
1030 | |
---|
1031 | /* create queue for asynchronous requests handling */ |
---|
1032 | status = rtems_message_queue_create( |
---|
1033 | rtems_build_name('A', 'T', 'A', 'Q'), |
---|
1034 | ATA_DRIVER_MESSAGE_QUEUE_SIZE, |
---|
1035 | sizeof(ata_queue_msg_t), |
---|
1036 | RTEMS_FIFO | RTEMS_LOCAL, |
---|
1037 | &ata_queue_id); |
---|
1038 | if (status != RTEMS_SUCCESSFUL) |
---|
1039 | { |
---|
1040 | rtems_disk_io_done(); |
---|
1041 | return status; |
---|
1042 | } |
---|
1043 | |
---|
1044 | /* |
---|
1045 | * create ATA driver task, see comments for task implementation for |
---|
1046 | * details |
---|
1047 | */ |
---|
1048 | status = rtems_task_create( |
---|
1049 | rtems_build_name ('A', 'T', 'A', 'T'), |
---|
1050 | ((ata_driver_task_priority > 0) |
---|
1051 | ? ata_driver_task_priority |
---|
1052 | : ATA_DRIVER_TASK_DEFAULT_PRIORITY), |
---|
1053 | ATA_DRIVER_TASK_STACK_SIZE, |
---|
1054 | RTEMS_PREEMPT | RTEMS_NO_TIMESLICE | RTEMS_ASR | |
---|
1055 | RTEMS_INTERRUPT_LEVEL(0), |
---|
1056 | RTEMS_NO_FLOATING_POINT | RTEMS_LOCAL, |
---|
1057 | &ata_task_id); |
---|
1058 | if (status != RTEMS_SUCCESSFUL) |
---|
1059 | { |
---|
1060 | rtems_message_queue_delete(ata_queue_id); |
---|
1061 | rtems_disk_io_done(); |
---|
1062 | return status; |
---|
1063 | } |
---|
1064 | |
---|
1065 | /* |
---|
1066 | * start ATA driver task. Actually the task will not start immediately - |
---|
1067 | * it will start only after multitasking support will be started |
---|
1068 | */ |
---|
1069 | status = rtems_task_start(ata_task_id, ata_queue_task, 0); |
---|
1070 | if (status != RTEMS_SUCCESSFUL) |
---|
1071 | { |
---|
1072 | rtems_task_delete(ata_task_id); |
---|
1073 | rtems_message_queue_delete(ata_queue_id); |
---|
1074 | rtems_disk_io_done(); |
---|
1075 | return status; |
---|
1076 | } |
---|
1077 | |
---|
1078 | buffer = (uint16_t*)malloc(ATA_SECTOR_SIZE); |
---|
1079 | if (buffer == NULL) |
---|
1080 | { |
---|
1081 | rtems_task_delete(ata_task_id); |
---|
1082 | rtems_message_queue_delete(ata_queue_id); |
---|
1083 | rtems_disk_io_done(); |
---|
1084 | return RTEMS_NO_MEMORY; |
---|
1085 | } |
---|
1086 | |
---|
1087 | ata_devs_number = 0; |
---|
1088 | |
---|
1089 | for (i = 0; i < (2 * IDE_CTRL_MAX_MINOR_NUMBER); i++) |
---|
1090 | ata_devs[i].device = ATA_UNDEFINED_VALUE; |
---|
1091 | |
---|
1092 | #if defined(ATA_USE_OLD_EXCEPTIONS) |
---|
1093 | /* prepare ATA driver for handling interrupt driven devices */ |
---|
1094 | for (i = 0; i < ATA_MAX_RTEMS_INT_VEC_NUMBER; i++) |
---|
1095 | Chain_Initialize_empty(&ata_int_vec[i]); |
---|
1096 | #else |
---|
1097 | for (i = 0; i < ATA_IRQ_CHAIN_MAX_CNT; i++) { |
---|
1098 | Chain_Initialize_empty(&(ata_irq_chain[i].irq_chain)); |
---|
1099 | } |
---|
1100 | #endif |
---|
1101 | |
---|
1102 | /* |
---|
1103 | * during ATA driver initialization EXECUTE DEVICE DIAGNOSTIC and |
---|
1104 | * IDENTIFY DEVICE ATA command should be issued; for these purposes ATA |
---|
1105 | * requests should be formed; ATA requests contain block device request, |
---|
1106 | * so form block device request first |
---|
1107 | */ |
---|
1108 | memset(&breq, 0, sizeof(blkdev_request1)); |
---|
1109 | breq.req.req_done = NULL; |
---|
1110 | breq.req.done_arg = &breq; |
---|
1111 | breq.req.bufnum = 1; |
---|
1112 | breq.req.count = 1; |
---|
1113 | breq.req.bufs[0].length = ATA_SECTOR_SIZE; |
---|
1114 | breq.req.bufs[0].buffer = buffer; |
---|
1115 | |
---|
1116 | /* |
---|
1117 | * for each presented IDE controller execute EXECUTE DEVICE DIAGNOSTIC |
---|
1118 | * ATA command; for each found device execute IDENTIFY DEVICE ATA |
---|
1119 | * command |
---|
1120 | */ |
---|
1121 | for (ctrl_minor = 0; ctrl_minor < IDE_Controller_Count; ctrl_minor++) |
---|
1122 | if (IDE_Controller_Table[ctrl_minor].status == IDE_CTRL_INITIALIZED) |
---|
1123 | { |
---|
1124 | Chain_Initialize_empty(&ata_ide_ctrls[ctrl_minor].reqs); |
---|
1125 | |
---|
1126 | if (IDE_Controller_Table[ctrl_minor].int_driven == TRUE) |
---|
1127 | { |
---|
1128 | int_st = malloc(sizeof(ata_int_st_t)); |
---|
1129 | if (int_st == NULL) |
---|
1130 | { |
---|
1131 | free(buffer); |
---|
1132 | rtems_task_delete(ata_task_id); |
---|
1133 | rtems_message_queue_delete(ata_queue_id); |
---|
1134 | rtems_disk_io_done(); |
---|
1135 | return RTEMS_NO_MEMORY; |
---|
1136 | } |
---|
1137 | |
---|
1138 | int_st->ctrl_minor = ctrl_minor; |
---|
1139 | #if defined(ATA_USE_OLD_EXCEPTIONS) |
---|
1140 | status = rtems_interrupt_catch( |
---|
1141 | ata_interrupt_handler, |
---|
1142 | IDE_Controller_Table[ctrl_minor].int_vec, |
---|
1143 | &old_isr); |
---|
1144 | #else |
---|
1145 | /* |
---|
1146 | * FIXME: check existing entries. if they use the same |
---|
1147 | * IRQ name, then append int_st to respective chain |
---|
1148 | * otherwise, use new ata_irq_chain entry |
---|
1149 | */ |
---|
1150 | ata_irq_chain_use = -1; |
---|
1151 | for (i = 0; |
---|
1152 | ((i < ata_irq_chain_cnt) && |
---|
1153 | (ata_irq_chain_use < 0));i++) { |
---|
1154 | if (ata_irq_chain[i].name == |
---|
1155 | IDE_Controller_Table[ctrl_minor].int_vec) { |
---|
1156 | ata_irq_chain_use = i; |
---|
1157 | } |
---|
1158 | } |
---|
1159 | if (ata_irq_chain_use < 0) { |
---|
1160 | /* |
---|
1161 | * no match found, try to use new channel entry |
---|
1162 | */ |
---|
1163 | if (ata_irq_chain_cnt < ATA_IRQ_CHAIN_MAX_CNT) { |
---|
1164 | ata_irq_chain_use = ata_irq_chain_cnt++; |
---|
1165 | |
---|
1166 | ata_irq_chain[ata_irq_chain_use].name = |
---|
1167 | IDE_Controller_Table[ctrl_minor].int_vec; |
---|
1168 | ata_irq_data.name = |
---|
1169 | IDE_Controller_Table[ctrl_minor].int_vec; |
---|
1170 | ata_irq_data.hdl = ata_interrupt_handler; |
---|
1171 | ata_irq_data.handle = ctrl_minor; |
---|
1172 | |
---|
1173 | status = ((0 == BSP_install_rtems_irq_handler(&ata_irq_data)) |
---|
1174 | ? RTEMS_INVALID_NUMBER |
---|
1175 | : RTEMS_SUCCESSFUL); |
---|
1176 | } |
---|
1177 | else { |
---|
1178 | status = RTEMS_TOO_MANY; |
---|
1179 | } |
---|
1180 | } |
---|
1181 | #endif |
---|
1182 | if (status != RTEMS_SUCCESSFUL) |
---|
1183 | { |
---|
1184 | free(int_st); |
---|
1185 | free(buffer); |
---|
1186 | rtems_task_delete(ata_task_id); |
---|
1187 | rtems_message_queue_delete(ata_queue_id); |
---|
1188 | rtems_disk_io_done(); |
---|
1189 | return status; |
---|
1190 | } |
---|
1191 | #if defined(ATA_USE_OLD_EXCEPTIONS) |
---|
1192 | Chain_Append( |
---|
1193 | &ata_int_vec[IDE_Controller_Table[ctrl_minor].int_vec], |
---|
1194 | &int_st->link); |
---|
1195 | #else |
---|
1196 | Chain_Append( |
---|
1197 | &(ata_irq_chain[ata_irq_chain_use].irq_chain), |
---|
1198 | &int_st->link); |
---|
1199 | #endif |
---|
1200 | |
---|
1201 | /* disable interrupts */ |
---|
1202 | ide_controller_write_register(ctrl_minor, |
---|
1203 | IDE_REGISTER_DEVICE_CONTROL_OFFSET, |
---|
1204 | IDE_REGISTER_DEVICE_CONTROL_nIEN); |
---|
1205 | } |
---|
1206 | |
---|
1207 | /* |
---|
1208 | * Issue EXECUTE DEVICE DIAGNOSTIC ATA command for explore is |
---|
1209 | * there any ATA device on the controller. |
---|
1210 | */ |
---|
1211 | memset(&areq, 0, sizeof(ata_req_t)); |
---|
1212 | areq.type = ATA_COMMAND_TYPE_NON_DATA; |
---|
1213 | areq.regs.to_write = ATA_REGISTERS_VALUE(IDE_REGISTER_COMMAND); |
---|
1214 | areq.regs.regs[IDE_REGISTER_COMMAND] = |
---|
1215 | ATA_COMMAND_EXECUTE_DEVICE_DIAGNOSTIC; |
---|
1216 | areq.regs.to_read = ATA_REGISTERS_VALUE(IDE_REGISTER_ERROR); |
---|
1217 | |
---|
1218 | areq.breq = (blkdev_request *)&breq; |
---|
1219 | |
---|
1220 | /* |
---|
1221 | * Process the request. Special processing of requests on |
---|
1222 | * initialization phase is needed because at this moment there |
---|
1223 | * is no multitasking enviroment |
---|
1224 | */ |
---|
1225 | ata_process_request_on_init_phase(ctrl_minor, &areq); |
---|
1226 | |
---|
1227 | /* |
---|
1228 | * check status of I/O operation |
---|
1229 | */ |
---|
1230 | if (breq.req.status != RTEMS_SUCCESSFUL) |
---|
1231 | continue; |
---|
1232 | |
---|
1233 | /* disassemble returned diagnostic codes */ |
---|
1234 | if (breq.req.error == ATA_DEV0_PASSED_DEV1_PASSED_OR_NOT_PRSNT) |
---|
1235 | { |
---|
1236 | ATA_DEV_INFO(ctrl_minor, 0).present = 1; |
---|
1237 | ATA_DEV_INFO(ctrl_minor,1).present = 1; |
---|
1238 | } |
---|
1239 | else if (breq.req.error == ATA_DEV0_PASSED_DEV1_FAILED) |
---|
1240 | { |
---|
1241 | ATA_DEV_INFO(ctrl_minor,0).present = 1; |
---|
1242 | ATA_DEV_INFO(ctrl_minor,1).present = 0; |
---|
1243 | } |
---|
1244 | else if (breq.req.error < ATA_DEV1_PASSED_DEV0_FAILED) |
---|
1245 | { |
---|
1246 | ATA_DEV_INFO(ctrl_minor,0).present = 0; |
---|
1247 | ATA_DEV_INFO(ctrl_minor,1).present = 1; |
---|
1248 | } |
---|
1249 | else |
---|
1250 | { |
---|
1251 | ATA_DEV_INFO(ctrl_minor, 0).present = 0; |
---|
1252 | ATA_DEV_INFO(ctrl_minor, 1).present = 0; |
---|
1253 | } |
---|
1254 | |
---|
1255 | /* refine the returned codes */ |
---|
1256 | if (ATA_DEV_INFO(ctrl_minor, 1).present != 0) |
---|
1257 | { |
---|
1258 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_ERROR, &ec); |
---|
1259 | if (ec & ATA_DEV1_PASSED_DEV0_FAILED) |
---|
1260 | ATA_DEV_INFO(ctrl_minor, 1).present = 1; |
---|
1261 | else |
---|
1262 | ATA_DEV_INFO(ctrl_minor, 1).present = 0; |
---|
1263 | } |
---|
1264 | |
---|
1265 | /* for each found ATA device obtain it configuration */ |
---|
1266 | for (dev = 0; dev < 2; dev++) |
---|
1267 | if (ATA_DEV_INFO(ctrl_minor, dev).present) |
---|
1268 | { |
---|
1269 | /* |
---|
1270 | * Issue DEVICE IDENTIFY ATA command and get device |
---|
1271 | * configuration |
---|
1272 | */ |
---|
1273 | memset(&areq, 0, sizeof(ata_req_t)); |
---|
1274 | areq.type = ATA_COMMAND_TYPE_PIO_IN; |
---|
1275 | areq.regs.to_write = ATA_REGISTERS_VALUE(IDE_REGISTER_COMMAND); |
---|
1276 | areq.regs.regs[IDE_REGISTER_COMMAND] = |
---|
1277 | ATA_COMMAND_IDENTIFY_DEVICE; |
---|
1278 | areq.regs.to_read = ATA_REGISTERS_VALUE(IDE_REGISTER_STATUS); |
---|
1279 | areq.breq = (blkdev_request *)&breq; |
---|
1280 | |
---|
1281 | areq.cnt = breq.req.count; |
---|
1282 | |
---|
1283 | areq.regs.regs[IDE_REGISTER_DEVICE_HEAD] |= |
---|
1284 | (dev << IDE_REGISTER_DEVICE_HEAD_DEV_POS); |
---|
1285 | |
---|
1286 | /* |
---|
1287 | * Process the request. Special processing of requests on |
---|
1288 | * initialization phase is needed because at this moment there |
---|
1289 | * is no multitasking enviroment |
---|
1290 | */ |
---|
1291 | ata_process_request_on_init_phase(ctrl_minor, &areq); |
---|
1292 | |
---|
1293 | /* check status of I/O operation */ |
---|
1294 | if (breq.req.status != RTEMS_SUCCESSFUL) |
---|
1295 | continue; |
---|
1296 | |
---|
1297 | /* |
---|
1298 | * Parse returned device configuration and fill in ATA internal |
---|
1299 | * device info structure |
---|
1300 | */ |
---|
1301 | ATA_DEV_INFO(ctrl_minor, dev).cylinders = |
---|
1302 | CF_LE_W(buffer[ATA_IDENT_WORD_NUM_OF_CURR_LOG_CLNDS]); |
---|
1303 | ATA_DEV_INFO(ctrl_minor, dev).heads = |
---|
1304 | CF_LE_W(buffer[ATA_IDENT_WORD_NUM_OF_CURR_LOG_HEADS]); |
---|
1305 | ATA_DEV_INFO(ctrl_minor, dev).sectors = |
---|
1306 | CF_LE_W(buffer[ATA_IDENT_WORD_NUM_OF_CURR_LOG_SECS]); |
---|
1307 | ATA_DEV_INFO(ctrl_minor, dev).lba_sectors = |
---|
1308 | (CF_LE_W(buffer[ATA_IDENT_WORD_NUM_OF_USR_SECS0]) << 16) + |
---|
1309 | CF_LE_W(buffer[ATA_IDENT_WORD_NUM_OF_USR_SECS1]); |
---|
1310 | ATA_DEV_INFO(ctrl_minor, dev).lba_avaible = |
---|
1311 | (CF_LE_W(buffer[ATA_IDENT_WORD_CAPABILITIES]) >> 9) & 0x1; |
---|
1312 | ATA_DEV_INFO(ctrl_minor, dev).max_multiple = |
---|
1313 | (uint8_t) (CF_LE_W(buffer[ATA_IDENT_WORD_RW_MULT])); |
---|
1314 | ATA_DEV_INFO(ctrl_minor, dev).current_multiple = |
---|
1315 | (CF_LE_W(buffer[ATA_IDENT_WORD_MULT_SECS]) & 0x100) ? |
---|
1316 | (uint8_t)(CF_LE_W(buffer[ATA_IDENT_WORD_MULT_SECS])) : |
---|
1317 | 0; |
---|
1318 | |
---|
1319 | if ((CF_LE_W(buffer[ATA_IDENT_WORD_FIELD_VALIDITY]) & |
---|
1320 | ATA_IDENT_BIT_VALID) == 0) { |
---|
1321 | /* no "supported modes" info -> use default */ |
---|
1322 | ATA_DEV_INFO(ctrl_minor, dev).mode_active = ATA_MODES_PIO3; |
---|
1323 | } |
---|
1324 | else { |
---|
1325 | ATA_DEV_INFO(ctrl_minor, dev).modes_available = |
---|
1326 | ((CF_LE_W(buffer[64]) & 0x1) ? ATA_MODES_PIO3 : 0) | |
---|
1327 | ((CF_LE_W(buffer[64]) & 0x2) ? ATA_MODES_PIO4 : 0) | |
---|
1328 | ((CF_LE_W(buffer[63]) & 0x1) ? ATA_MODES_DMA0 : 0) | |
---|
1329 | ((CF_LE_W(buffer[63]) & 0x2) ? |
---|
1330 | ATA_MODES_DMA0 | ATA_MODES_DMA1 : 0) | |
---|
1331 | ((CF_LE_W(buffer[63]) & 0x4) ? |
---|
1332 | ATA_MODES_DMA0 | ATA_MODES_DMA1 | ATA_MODES_DMA2 : 0); |
---|
1333 | if (ATA_DEV_INFO(ctrl_minor, dev).modes_available == 0) |
---|
1334 | continue; |
---|
1335 | /* |
---|
1336 | * choose most appropriate ATA device data I/O speed supported |
---|
1337 | * by the controller |
---|
1338 | */ |
---|
1339 | status = ide_controller_config_io_speed( |
---|
1340 | ctrl_minor, |
---|
1341 | ATA_DEV_INFO(ctrl_minor, dev).modes_available); |
---|
1342 | if (status != RTEMS_SUCCESSFUL) |
---|
1343 | continue; |
---|
1344 | } |
---|
1345 | /* |
---|
1346 | * Ok, let register new ATA device in the system |
---|
1347 | */ |
---|
1348 | ata_devs[ata_devs_number].ctrl_minor = ctrl_minor; |
---|
1349 | ata_devs[ata_devs_number].device = dev; |
---|
1350 | |
---|
1351 | /* The space leaves a hole for the character. */ |
---|
1352 | strcpy(name, "/dev/hd "); |
---|
1353 | name[7] = 'a' + 2 * ctrl_minor + dev; |
---|
1354 | |
---|
1355 | device = rtems_filesystem_make_dev_t( |
---|
1356 | major, |
---|
1357 | (ata_devs_number * |
---|
1358 | ATA_MINOR_NUM_RESERVED_PER_ATA_DEVICE)); |
---|
1359 | |
---|
1360 | status = rtems_disk_create_phys(device, ATA_SECTOR_SIZE, |
---|
1361 | ATA_DEV_INFO(ctrl_minor, dev).lba_avaible ? |
---|
1362 | ATA_DEV_INFO(ctrl_minor, dev).lba_sectors : |
---|
1363 | (ATA_DEV_INFO(ctrl_minor, dev).heads * |
---|
1364 | ATA_DEV_INFO(ctrl_minor, dev).cylinders * |
---|
1365 | ATA_DEV_INFO(ctrl_minor, dev).sectors), |
---|
1366 | (block_device_ioctl) ata_ioctl, name); |
---|
1367 | if (status != RTEMS_SUCCESSFUL) |
---|
1368 | { |
---|
1369 | ata_devs[ata_devs_number].device = ATA_UNDEFINED_VALUE; |
---|
1370 | continue; |
---|
1371 | } |
---|
1372 | ata_devs_number++; |
---|
1373 | } |
---|
1374 | if (IDE_Controller_Table[ctrl_minor].int_driven == TRUE) |
---|
1375 | { |
---|
1376 | ide_controller_write_register(ctrl_minor, |
---|
1377 | IDE_REGISTER_DEVICE_CONTROL_OFFSET, |
---|
1378 | 0x00); |
---|
1379 | } |
---|
1380 | } |
---|
1381 | |
---|
1382 | free(buffer); |
---|
1383 | ata_initialized = TRUE; |
---|
1384 | return RTEMS_SUCCESSFUL; |
---|
1385 | } |
---|
1386 | |
---|
1387 | /* ata_process_request_on_init_phase -- |
---|
1388 | * Process the ATA request during system initialization. Request |
---|
1389 | * processing is syncronous and doesn't use multiprocessing enviroment. |
---|
1390 | * |
---|
1391 | * PARAMETERS: |
---|
1392 | * ctrl_minor - controller identifier |
---|
1393 | * areq - ATA request |
---|
1394 | * |
---|
1395 | * RETURNS: |
---|
1396 | * NONE |
---|
1397 | */ |
---|
1398 | static void |
---|
1399 | ata_process_request_on_init_phase(rtems_device_minor_number ctrl_minor, |
---|
1400 | ata_req_t *areq) |
---|
1401 | { |
---|
1402 | uint16_t byte;/* emphasize that only 8 low bits is meaningful */ |
---|
1403 | uint8_t i, dev; |
---|
1404 | uint16_t val, val1; |
---|
1405 | uint16_t data_bs; /* the number of 512 bytes sectors into one |
---|
1406 | * data block |
---|
1407 | */ |
---|
1408 | assert(areq); |
---|
1409 | |
---|
1410 | dev = areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] & |
---|
1411 | IDE_REGISTER_DEVICE_HEAD_DEV; |
---|
1412 | |
---|
1413 | data_bs = ATA_DEV_INFO(ctrl_minor, dev).current_multiple ? |
---|
1414 | ATA_DEV_INFO(ctrl_minor, dev).current_multiple : 1; |
---|
1415 | |
---|
1416 | ide_controller_write_register(ctrl_minor, IDE_REGISTER_DEVICE_HEAD, |
---|
1417 | areq->regs.regs[IDE_REGISTER_DEVICE_HEAD]); |
---|
1418 | |
---|
1419 | do { |
---|
1420 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, &byte); |
---|
1421 | } while ((byte & IDE_REGISTER_STATUS_BSY) || |
---|
1422 | (!(byte & IDE_REGISTER_STATUS_DRDY))); |
---|
1423 | |
---|
1424 | for (i=0; i< ATA_MAX_CMD_REG_OFFSET; i++) |
---|
1425 | { |
---|
1426 | uint32_t reg = (1 << i); |
---|
1427 | if (areq->regs.to_write & reg) |
---|
1428 | ide_controller_write_register(ctrl_minor, i, |
---|
1429 | areq->regs.regs[i]); |
---|
1430 | } |
---|
1431 | |
---|
1432 | do { |
---|
1433 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, &byte); |
---|
1434 | } while (byte & IDE_REGISTER_STATUS_BSY); |
---|
1435 | |
---|
1436 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, &val); |
---|
1437 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_ERROR, &val1); |
---|
1438 | |
---|
1439 | if (val & IDE_REGISTER_STATUS_ERR) |
---|
1440 | { |
---|
1441 | areq->breq->status = RTEMS_UNSATISFIED; |
---|
1442 | areq->breq->error = RTEMS_IO_ERROR; |
---|
1443 | return; |
---|
1444 | } |
---|
1445 | |
---|
1446 | switch(areq->type) |
---|
1447 | { |
---|
1448 | case ATA_COMMAND_TYPE_PIO_IN: |
---|
1449 | ide_controller_read_data_block( |
---|
1450 | ctrl_minor, |
---|
1451 | MIN(data_bs, areq->cnt) * ATA_SECTOR_SIZE, |
---|
1452 | areq->breq->bufs, &areq->cbuf, |
---|
1453 | &areq->pos); |
---|
1454 | |
---|
1455 | areq->cnt -= MIN(data_bs, areq->cnt); |
---|
1456 | if (areq->cnt == 0) |
---|
1457 | { |
---|
1458 | areq->breq->status = RTEMS_SUCCESSFUL; |
---|
1459 | } |
---|
1460 | else |
---|
1461 | { |
---|
1462 | /* |
---|
1463 | * this shouldn't happend on the initialization |
---|
1464 | * phase! |
---|
1465 | */ |
---|
1466 | rtems_fatal_error_occurred(RTEMS_INTERNAL_ERROR); |
---|
1467 | } |
---|
1468 | break; |
---|
1469 | |
---|
1470 | case ATA_COMMAND_TYPE_NON_DATA: |
---|
1471 | areq->breq->status = RTEMS_SUCCESSFUL; |
---|
1472 | areq->breq->error = val1; |
---|
1473 | break; |
---|
1474 | |
---|
1475 | default: |
---|
1476 | #ifdef DEBUG |
---|
1477 | printf("ata_queue_task: non-supported command type\n"); |
---|
1478 | #endif |
---|
1479 | areq->breq->status = RTEMS_UNSATISFIED; |
---|
1480 | areq->breq->error = RTEMS_NOT_IMPLEMENTED; |
---|
1481 | break; |
---|
1482 | } |
---|
1483 | } |
---|