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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 | |||
| 53 | typedef union { |
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| 54 | /* Read */ |
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| 55 | struct { |
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| 56 | uint8_t data_port; |
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| 57 | uint8_t error; |
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| 58 | uint8_t sector_count; |
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| 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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| 63 | uint8_t status; |
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| 64 | }; |
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| 65 | |||
| 66 | /* Write */ |
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| 67 | struct { |
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| 68 | uint8_t pad0[7]; |
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| 69 | uint8_t command; |
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| 70 | }; |
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| 71 | } ata_cmd_t; |
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| 72 | |||
| 73 | typedef union { |
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| 74 | /* Read */ |
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| 75 | struct { |
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| 76 | uint8_t pad0[6]; |
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| 77 | uint8_t alt_status; |
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| 78 | uint8_t drive_address; |
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| 79 | }; |
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| 80 | |||
| 81 | /* Write */ |
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| 82 | struct { |
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| 83 | uint8_t pad1[6]; |
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| 84 | uint8_t device_control; |
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| 85 | uint8_t pad2; |
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| 86 | }; |
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| 87 | } ata_ctl_t; |
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| 88 | |||
| 89 | enum devctl_bits { |
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| 90 | DCR_SRST = 0x04, /**< Software Reset */ |
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| 91 | DCR_nIEN = 0x02 /**< Interrupt Enable (negated) */ |
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| 92 | }; |
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| 93 | |||
| 94 | enum status_bits { |
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| 95 | SR_BSY = 0x80, /**< Busy */ |
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| 96 | SR_DRDY = 0x40, /**< Drive Ready */ |
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| 97 | SR_DWF = 0x20, /**< Drive Write Fault */ |
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| 98 | SR_DSC = 0x10, /**< Drive Seek Complete */ |
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| 99 | SR_DRQ = 0x08, /**< Data Request */ |
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| 100 | SR_CORR = 0x04, /**< Corrected Data */ |
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| 101 | SR_IDX = 0x02, /**< Index */ |
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| 102 | SR_ERR = 0x01 /**< Error */ |
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| 103 | }; |
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| 104 | |||
| 105 | enum drive_head_bits { |
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| 106 | DHR_DRV = 0x10 |
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| 107 | }; |
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| 108 | |||
| 109 | enum error_bits { |
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| 110 | ER_BBK = 0x80, /**< Bad Block Detected */ |
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| 111 | ER_UNC = 0x40, /**< Uncorrectable Data Error */ |
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| 112 | ER_MC = 0x20, /**< Media Changed */ |
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| 113 | ER_IDNF = 0x10, /**< ID Not Found */ |
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| 114 | ER_MCR = 0x08, /**< Media Change Request */ |
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| 115 | ER_ABRT = 0x04, /**< Aborted Command */ |
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| 116 | ER_TK0NF = 0x02, /**< Track 0 Not Found */ |
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| 117 | ER_AMNF = 0x01 /**< Address Mark Not Found */ |
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| 118 | }; |
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| 119 | |||
| 4531 | svoboda | 120 | enum ata_command { |
| 121 | CMD_IDENTIFY_DRIVE = 0xEC, |
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| 122 | CMD_READ_SECTORS = 0x20, |
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| 123 | CMD_WRITE_SECTORS = 0x30 |
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| 124 | }; |
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| 125 | |||
| 4529 | svoboda | 126 | typedef struct { |
| 127 | bool present; |
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| 128 | unsigned heads; |
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| 129 | unsigned cylinders; |
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| 130 | unsigned sectors; |
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| 131 | uint64_t blocks; |
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| 132 | } disk_t; |
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| 133 | |||
| 4530 | svoboda | 134 | #endif |
| 4507 | svoboda | 135 | |
| 4530 | svoboda | 136 | /** @} |
| 4507 | svoboda | 137 | */ |