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| 4507 | svoboda | 1 | /* |
| 2 | * Copyright (c) 2009 Jiri Svoboda |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | /** @addtogroup bd |
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| 30 | * @{ |
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| 31 | */ |
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| 4530 | svoboda | 32 | /** @file |
| 4507 | svoboda | 33 | */ |
| 34 | |||
| 4530 | svoboda | 35 | #ifndef __ATA_BD_H__ |
| 36 | #define __ATA_BD_H__ |
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| 37 | |||
| 4507 | svoboda | 38 | #include <sys/types.h> |
| 39 | |||
| 40 | enum { |
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| 41 | CTL_READ_START = 0, |
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| 42 | CTL_WRITE_START = 1, |
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| 43 | }; |
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| 44 | |||
| 45 | enum { |
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| 46 | STATUS_FAILURE = 0 |
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| 47 | }; |
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| 48 | |||
| 49 | enum { |
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| 50 | MAX_DISKS = 2 |
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| 51 | }; |
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| 52 | |||
| 4546 | svoboda | 53 | /** ATA Command Register Block. */ |
| 4507 | svoboda | 54 | typedef union { |
| 4546 | svoboda | 55 | /* Read/Write */ |
| 4507 | svoboda | 56 | struct { |
| 4546 | svoboda | 57 | uint16_t data_port; |
| 4507 | svoboda | 58 | uint8_t sector_count; |
| 59 | uint8_t sector_number; |
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| 60 | uint8_t cylinder_low; |
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| 61 | uint8_t cylinder_high; |
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| 62 | uint8_t drive_head; |
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| 4546 | svoboda | 63 | uint8_t pad_rw0; |
| 64 | }; |
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| 65 | |||
| 66 | /* Read Only */ |
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| 67 | struct { |
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| 68 | uint8_t pad_ro0; |
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| 69 | uint8_t error; |
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| 70 | uint8_t pad_ro1[5]; |
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| 4507 | svoboda | 71 | uint8_t status; |
| 72 | }; |
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| 73 | |||
| 4546 | svoboda | 74 | /* Write Only */ |
| 4507 | svoboda | 75 | struct { |
| 4546 | svoboda | 76 | uint8_t pad_wo0; |
| 77 | uint8_t features; |
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| 78 | uint8_t pad_wo1[5]; |
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| 4507 | svoboda | 79 | uint8_t command; |
| 80 | }; |
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| 81 | } ata_cmd_t; |
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| 82 | |||
| 83 | typedef union { |
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| 84 | /* Read */ |
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| 85 | struct { |
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| 86 | uint8_t pad0[6]; |
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| 87 | uint8_t alt_status; |
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| 88 | uint8_t drive_address; |
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| 89 | }; |
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| 90 | |||
| 91 | /* Write */ |
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| 92 | struct { |
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| 93 | uint8_t pad1[6]; |
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| 94 | uint8_t device_control; |
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| 95 | uint8_t pad2; |
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| 96 | }; |
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| 97 | } ata_ctl_t; |
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| 98 | |||
| 99 | enum devctl_bits { |
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| 100 | DCR_SRST = 0x04, /**< Software Reset */ |
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| 101 | DCR_nIEN = 0x02 /**< Interrupt Enable (negated) */ |
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| 102 | }; |
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| 103 | |||
| 104 | enum status_bits { |
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| 105 | SR_BSY = 0x80, /**< Busy */ |
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| 106 | SR_DRDY = 0x40, /**< Drive Ready */ |
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| 107 | SR_DWF = 0x20, /**< Drive Write Fault */ |
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| 108 | SR_DSC = 0x10, /**< Drive Seek Complete */ |
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| 109 | SR_DRQ = 0x08, /**< Data Request */ |
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| 110 | SR_CORR = 0x04, /**< Corrected Data */ |
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| 111 | SR_IDX = 0x02, /**< Index */ |
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| 112 | SR_ERR = 0x01 /**< Error */ |
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| 113 | }; |
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| 114 | |||
| 115 | enum drive_head_bits { |
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| 116 | DHR_DRV = 0x10 |
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| 117 | }; |
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| 118 | |||
| 119 | enum error_bits { |
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| 120 | ER_BBK = 0x80, /**< Bad Block Detected */ |
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| 121 | ER_UNC = 0x40, /**< Uncorrectable Data Error */ |
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| 122 | ER_MC = 0x20, /**< Media Changed */ |
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| 123 | ER_IDNF = 0x10, /**< ID Not Found */ |
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| 124 | ER_MCR = 0x08, /**< Media Change Request */ |
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| 125 | ER_ABRT = 0x04, /**< Aborted Command */ |
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| 126 | ER_TK0NF = 0x02, /**< Track 0 Not Found */ |
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| 127 | ER_AMNF = 0x01 /**< Address Mark Not Found */ |
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| 128 | }; |
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| 129 | |||
| 4531 | svoboda | 130 | enum ata_command { |
| 131 | CMD_IDENTIFY_DRIVE = 0xEC, |
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| 132 | CMD_READ_SECTORS = 0x20, |
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| 133 | CMD_WRITE_SECTORS = 0x30 |
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| 134 | }; |
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| 135 | |||
| 4529 | svoboda | 136 | typedef struct { |
| 137 | bool present; |
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| 138 | unsigned heads; |
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| 139 | unsigned cylinders; |
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| 140 | unsigned sectors; |
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| 141 | uint64_t blocks; |
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| 142 | } disk_t; |
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| 143 | |||
| 4530 | svoboda | 144 | #endif |
| 4507 | svoboda | 145 | |
| 4530 | svoboda | 146 | /** @} |
| 4507 | svoboda | 147 | */ |