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  1. /*
  2.  * Copyright (c) 2009 Jiri Svoboda
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup bd
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef __ATA_BD_H__
  36. #define __ATA_BD_H__
  37.  
  38. #include <sys/types.h>
  39.  
  40. enum {
  41.     CTL_READ_START  = 0,
  42.     CTL_WRITE_START = 1,
  43. };
  44.  
  45. enum {
  46.     STATUS_FAILURE  = 0
  47. };
  48.  
  49. enum {
  50.     MAX_DISKS   = 2
  51. };
  52.  
  53. typedef union {
  54.     /* Read */
  55.     struct {
  56.         uint8_t data_port;
  57.         uint8_t error;
  58.         uint8_t sector_count;
  59.         uint8_t sector_number;
  60.         uint8_t cylinder_low;
  61.         uint8_t cylinder_high;
  62.         uint8_t drive_head;
  63.         uint8_t status;
  64.     };
  65.  
  66.     /* Write */
  67.     struct {
  68.         uint8_t pad0[7];
  69.         uint8_t command;
  70.     };
  71. } ata_cmd_t;
  72.  
  73. typedef union {
  74.     /* Read */
  75.     struct {
  76.         uint8_t pad0[6];
  77.         uint8_t alt_status;
  78.         uint8_t drive_address;
  79.     };
  80.  
  81.     /* Write */
  82.     struct {
  83.         uint8_t pad1[6];
  84.         uint8_t device_control;
  85.         uint8_t pad2;
  86.     };
  87. } ata_ctl_t;
  88.  
  89. enum devctl_bits {
  90.     DCR_SRST    = 0x04, /**< Software Reset */
  91.     DCR_nIEN    = 0x02  /**< Interrupt Enable (negated) */
  92. };
  93.  
  94. enum status_bits {
  95.     SR_BSY      = 0x80, /**< Busy */
  96.     SR_DRDY     = 0x40, /**< Drive Ready */
  97.     SR_DWF      = 0x20, /**< Drive Write Fault */
  98.     SR_DSC      = 0x10, /**< Drive Seek Complete */
  99.     SR_DRQ      = 0x08, /**< Data Request */
  100.     SR_CORR     = 0x04, /**< Corrected Data */
  101.     SR_IDX      = 0x02, /**< Index */
  102.     SR_ERR      = 0x01  /**< Error */
  103. };
  104.  
  105. enum drive_head_bits {
  106.     DHR_DRV     = 0x10
  107. };
  108.  
  109. enum error_bits {
  110.     ER_BBK      = 0x80, /**< Bad Block Detected */
  111.     ER_UNC      = 0x40, /**< Uncorrectable Data Error */
  112.     ER_MC       = 0x20, /**< Media Changed */
  113.     ER_IDNF     = 0x10, /**< ID Not Found */
  114.     ER_MCR      = 0x08, /**< Media Change Request */
  115.     ER_ABRT     = 0x04, /**< Aborted Command */
  116.     ER_TK0NF    = 0x02, /**< Track 0 Not Found */
  117.     ER_AMNF     = 0x01  /**< Address Mark Not Found */
  118. };
  119.  
  120. enum ata_command {
  121.     CMD_IDENTIFY_DRIVE  = 0xEC,
  122.     CMD_READ_SECTORS    = 0x20,
  123.     CMD_WRITE_SECTORS   = 0x30
  124. };
  125.  
  126. typedef struct {
  127.     bool present;
  128.     unsigned heads;
  129.     unsigned cylinders;
  130.     unsigned sectors;
  131.     uint64_t blocks;
  132. } disk_t;
  133.  
  134. #endif
  135.  
  136. /** @}
  137.  */
  138.