| 1 | ; Project name : XTIDE Universal BIOS Configurator v2
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| 2 | ; Description : Functions to detect ports and devices.
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| 3 |
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| 4 | ;
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| 5 | ; XTIDE Universal BIOS and Associated Tools
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| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
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| 7 | ;
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| 8 | ; This program is free software; you can redistribute it and/or modify
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| 9 | ; it under the terms of the GNU General Public License as published by
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| 10 | ; the Free Software Foundation; either version 2 of the License, or
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| 11 | ; (at your option) any later version.
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| 12 | ;
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| 13 | ; This program is distributed in the hope that it will be useful,
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| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | ; GNU General Public License for more details.
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| 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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| 18 | ;
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| 19 |
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| 20 | ; Section containing code
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| 21 | SECTION .text
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| 22 |
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| 23 | IDE_PORT_TO_START_DETECTION EQU 00h ; Must be zero (not actual port)
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| 24 | FIRST_MEMORY_SEGMENT_ADDRESS EQU 0C000h
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| 25 |
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| 26 | ;--------------------------------------------------------------------
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| 27 | ; IdeAutodetect_DetectIdeDeviceFromPortDXAndReturnControlBlockInSI
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| 28 | ; Parameters:
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| 29 | ; DX: IDE Base Port or segment address (Command Block)
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| 30 | ; DS:DI: Ptr to ROMVARS
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| 31 | ; Returns:
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| 32 | ; AL: Device Type
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| 33 | ; SI: IDE Control Block Base port (port mapped devices only)
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| 34 | ; CF: Clear if IDE Device found
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| 35 | ; Set if IDE Device not found
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| 36 | ; Corrupts registers:
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| 37 | ; AH, BX
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| 38 | ;--------------------------------------------------------------------
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| 39 | IdeAutodetect_DetectIdeDeviceFromPortDXAndReturnControlBlockInSI:
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| 40 | cmp dh, FIRST_MEMORY_SEGMENT_ADDRESS >> 8
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| 41 | jb SHORT DetectPortMappedDeviceFromPortDX
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| 42 | ; Fall to DetectMemoryMappedDeviceFromSegmentDX
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| 43 |
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| 44 | ;--------------------------------------------------------------------
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| 45 | ; DetectMemoryMappedDeviceFromSegmentDX
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| 46 | ; Parameters:
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| 47 | ; DX: Segment address for Memory Mapped Device
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| 48 | ; DS:DI: Ptr to ROMVARS
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| 49 | ; Returns:
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| 50 | ; AL: Device Type
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| 51 | ; CF: Clear if IDE Device found
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| 52 | ; Set if IDE Device not found
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| 53 | ; Corrupts registers:
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| 54 | ; AH, BX
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| 55 | ;--------------------------------------------------------------------
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| 56 | DetectMemoryMappedDeviceFromSegmentDX:
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| 57 | ; *** Try to detect JR-IDE/ISA and ADP50L (only if MODULE_8BIT_IDE_ADVANCED is present) ***
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| 58 | test BYTE [di+ROMVARS.wFlags], FLG_ROMVARS_MODULE_8BIT_IDE_ADVANCED
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| 59 | stc
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| 60 | jz SHORT .NoIdeDeviceFound
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| 61 |
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| 62 | push ds
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| 63 | mov ds, dx
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| 64 |
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| 65 | cli
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| 66 | mov ah, [JRIDE_COMMAND_BLOCK_REGISTER_WINDOW_OFFSET + STATUS_REGISTER_in]
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| 67 | mov al, [JRIDE_CONTROL_BLOCK_REGISTER_WINDOW_OFFSET + ALTERNATE_STATUS_REGISTER_in]
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| 68 | sti
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| 69 | call CompareIdeStatusRegistersFromALandAH
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| 70 | mov al, DEVICE_8BIT_JRIDE_ISA
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| 71 | jnc .IdeDeviceFound
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| 72 |
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| 73 | cli
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| 74 | mov ah, [ADP50L_COMMAND_BLOCK_REGISTER_WINDOW_OFFSET + (STATUS_REGISTER_in << 1)]
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| 75 | mov al, [ADP50L_CONTROL_BLOCK_REGISTER_WINDOW_OFFSET + (ALTERNATE_STATUS_REGISTER_in << 1)]
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| 76 | sti
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| 77 | call CompareIdeStatusRegistersFromALandAH
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| 78 | mov al, DEVICE_8BIT_ADP50L
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| 79 |
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| 80 | .IdeDeviceFound:
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| 81 | mov si, dx ; For IDEDTCT.COM
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| 82 | pop ds
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| 83 | .NoIdeDeviceFound:
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| 84 | ret
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| 85 |
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| 86 |
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| 87 | ;--------------------------------------------------------------------
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| 88 | ; DetectPortMappedDeviceFromPortDX
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| 89 | ; Parameters:
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| 90 | ; DX: IDE Base Port (Command Block)
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| 91 | ; DS:DI: Ptr to ROMVARS
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| 92 | ; Returns:
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| 93 | ; AL: Device Type
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| 94 | ; SI: IDE Control Block Base port
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| 95 | ; CF: Clear if IDE Device found
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| 96 | ; Set if IDE Device not found
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| 97 | ; Corrupts registers:
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| 98 | ; AH, BX
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| 99 | ;--------------------------------------------------------------------
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| 100 | DetectPortMappedDeviceFromPortDX:
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| 101 | mov si, dx
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| 102 | mov bx, STATUS_REGISTER_in | (ALTERNATE_STATUS_REGISTER_in << 8)
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| 103 | ; *** Try to detect AC-1075 / AC-1070 controllers ***
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| 104 | cmp dh, 25h
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| 105 | jne SHORT .NotArcoComputerProducts
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| 106 | add si, BYTE 8 ; Add control block offset
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| 107 | call DetectIdeDeviceFromPortsDXandSIwithOffsetsInBLandBH
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| 108 | mov al, DEVICE_16BIT_ATA
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| 109 | ret
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| 110 | .NotArcoComputerProducts:
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| 111 | ; *** Try to detect Standard 16- and 32-bit IDE Devices ***
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| 112 | mov al, DEVICE_16BIT_ATA ; Assume 16-bit ISA slot for AT builds
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| 113 | call Buffers_IsXTbuildLoaded
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| 114 | eCMOVE al, DEVICE_8BIT_ATA ; Assume 8-bit ISA slot for XT builds
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| 115 |
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| 116 | ; Start with standard Control Block base port used by Primary and Secondary IDE
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| 117 | add si, STANDARD_CONTROL_BLOCK_OFFSET
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| 118 | .RedetectTertiaryOrQuaternaryWithDifferentControlBlockAddress:
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| 119 | push ax ; Store device type
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| 120 | call DetectIdeDeviceFromPortsDXandSIwithOffsetsInBLandBH
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| 121 | pop ax ; Restore device type
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| 122 | jnc SHORT .IdeDeviceFound
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| 123 |
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| 124 | ; 16- or 32-bit IDE Device was not found but we may have used wrong Control Block port if we were trying
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| 125 | ; to detect Tertiary or Quaternary IDE controllers. Control Block port location is not standardized. For
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| 126 | ; example Promise FloppyMAX has Control Block at STANDARD_CONTROL_BLOCK_OFFSET but Sound Blaster 16 (CT2290)
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| 127 | ; use DEVICE_ATA_SECONDARY_PORTCTRL for Tertiary and Quaternary even though only Secondary should use that.
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| 128 | call ChangeControlBlockAddressInSI
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| 129 | jz SHORT .RedetectTertiaryOrQuaternaryWithDifferentControlBlockAddress
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| 130 |
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| 131 | ; Detect 8-bit devices only if MODULE_8BIT_IDE is available
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| 132 | test BYTE [di+ROMVARS.wFlags], FLG_ROMVARS_MODULE_8BIT_IDE | FLG_ROMVARS_MODULE_8BIT_IDE_ADVANCED
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| 133 | jz SHORT NoIdeDeviceFound
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| 134 | jpo SHORT .SkipXTCF ; Only 1 bit set means no MODULE_8BIT_IDE_ADVANCED
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| 135 |
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| 136 | ; *** Try to detect XT-CF ***
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| 137 | mov si, dx
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| 138 | add si, BYTE XTCF_CONTROL_BLOCK_OFFSET
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| 139 | eSHL_IM bx, 1 ; SHL 1 register offsets for XT-CF
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| 140 | call DetectIdeDeviceFromPortsDXandSIwithOffsetsInBLandBH
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| 141 | mov al, DEVICE_8BIT_XTCF_PIO8
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| 142 | jnc SHORT .IdeDeviceFound
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| 143 | shr bx, 1
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| 144 | .SkipXTCF:
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| 145 |
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| 146 | ; *** Try to detect 8-bit XT-IDE rev 1 or rev 2 ***
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| 147 | ; Note that A0<->A3 address swaps Status Register and Alternative
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| 148 | ; Status Register addresses. That is why we need another step
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| 149 | ; to check is this XT-IDE rev 1 or rev 2.
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| 150 | mov si, dx
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| 151 | add si, BYTE XTIDE_CONTROL_BLOCK_OFFSET
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| 152 | call DetectIdeDeviceFromPortsDXandSIwithOffsetsInBLandBH
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| 153 | jc SHORT NoIdeDeviceFound ; No XT-IDE rev 1 or rev 2 found
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| 154 |
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| 155 | ; Now we can be sure that we have XT-IDE rev 1 or rev 2.
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| 156 | ; Rev 2 swaps address lines A0 and A3 thus LBA Low Register
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| 157 | ; moves from offset 3h to offset Ah. There is no Register at
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| 158 | ; offset Ah so if we can write to it and read back, then we
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| 159 | ; must have XT-IDE rev 2 or modded rev 1.
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| 160 | push dx
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| 161 | add dx, BYTE 0Ah ; LBA Low Register for XT-IDE rev 2
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| 162 | mov al, DEVICE_8BIT_XTIDE_REV2 ; Our test byte
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| 163 | out dx, al ; Output our test byte
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| 164 | JMP_DELAY
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| 165 | in al, dx ; Read back
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| 166 | pop dx
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| 167 | cmp al, DEVICE_8BIT_XTIDE_REV2
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| 168 | je SHORT .IdeDeviceFound
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| 169 | mov al, DEVICE_8BIT_XTIDE_REV1 ; We must have rev 1
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| 170 | .IdeDeviceFound:
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| 171 | clc
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| 172 | ret
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| 173 |
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| 174 |
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| 175 | ;--------------------------------------------------------------------
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| 176 | ; DetectIdeDeviceFromPortsDXandSIwithOffsetsInBLandBH
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| 177 | ; Parameters:
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| 178 | ; BL: Offset to IDE Status Register
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| 179 | ; BH: Offset to Alternative Status Register
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| 180 | ; DX: IDE Base Port address
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| 181 | ; SI: IDE Control Block address
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| 182 | ; Returns:
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| 183 | ; CF: Clear if IDE Device found
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| 184 | ; Set if IDE Device not found
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| 185 | ; Corrupts registers:
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| 186 | ; AX
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| 187 | ;--------------------------------------------------------------------
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| 188 | DetectIdeDeviceFromPortsDXandSIwithOffsetsInBLandBH:
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| 189 | ; Read Status and Alternative Status Registers
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| 190 | push dx
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| 191 |
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| 192 | add dl, bl
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| 193 | cli ; Disable Interrupts
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| 194 | in al, dx ; Read Status Register...
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| 195 | mov ah, al ; ...to AH
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| 196 | mov dx, si
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| 197 | add dl, bh
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| 198 | in al, dx ; Read Alternative Status Register to AL
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| 199 | sti ; Enable Interrupts
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| 200 |
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| 201 | pop dx
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| 202 | ; Fall to CompareIdeStatusRegistersFromALandAH
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| 203 |
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| 204 |
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| 205 | ;--------------------------------------------------------------------
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| 206 | ; CompareIdeStatusRegistersFromALandAH
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| 207 | ; Parameters:
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| 208 | ; AH: Possible IDE Status Register contents
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| 209 | ; AL: Possible IDE Alternative Status Register contents
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| 210 | ; Returns:
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| 211 | ; CF: Clear if valid Status Register Contents
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| 212 | ; Set if not possible IDE Status Registers
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| 213 | ; Corrupts registers:
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| 214 | ; Nothing
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| 215 | ;--------------------------------------------------------------------
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| 216 | CompareIdeStatusRegistersFromALandAH:
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| 217 | ; Status Register now in AH and Alternative Status Register in AL.
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| 218 | ; They must be the same if base port was in use by IDE device.
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| 219 | cmp al, ah
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| 220 | jne SHORT NoIdeDeviceFound
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| 221 |
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| 222 | ; Bytes were the same but it is possible they were both FFh, for
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| 223 | ; example. We must make sure bits are what is expected from valid
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| 224 | ; IDE Status Register. So far all drives I've tested return 50h
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| 225 | ; (FLG_STATUS_DRDY and FLG_STATUS_DSC set) or 00h.
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| 226 | ; I suspect that the zero might mean non available drive is selected. For example if Master
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| 227 | ; drive is present but Slave is selected from IDE Drive and Head Select Register,
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| 228 | ; then the Status Register can be 00h. We cannot accept 00h as valid byte
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| 229 | ; since that can easily cause invalid JR-IDE/ISA detections.
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| 230 | test al, FLG_STATUS_BSY | FLG_STATUS_DF | FLG_STATUS_DRQ | FLG_STATUS_ERR
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| 231 | jnz SHORT NoIdeDeviceFound ; Busy or Errors cannot be set
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| 232 | test al, FLG_STATUS_DRDY
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| 233 | jz SHORT NoIdeDeviceFound ; Device needs to be ready
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| 234 | ret ; Return with CF cleared
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| 235 |
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| 236 | NoIdeDeviceFound:
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| 237 | stc
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| 238 | ret
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| 239 |
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| 240 |
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| 241 | ;--------------------------------------------------------------------
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| 242 | ; ChangeControlBlockAddressInSI
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| 243 | ; Parameters:
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| 244 | ; DX: IDE Base Port address
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| 245 | ; SI: IDE Control Block address
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| 246 | ; Returns:
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| 247 | ; ZF: Set if SI changed
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| 248 | ; Cleared if different control block address is not possible
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| 249 | ; Corrupts registers:
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| 250 | ; Nothing
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| 251 | ;--------------------------------------------------------------------
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| 252 | ChangeControlBlockAddressInSI:
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| 253 | cmp si, 368h
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| 254 | je SHORT .TrySecondAlternative
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| 255 | cmp si, 3E8h
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| 256 | je SHORT .TrySecondAlternative
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| 257 |
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| 258 | cmp si, 360h
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| 259 | je SHORT .TryLastAlternative
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| 260 | cmp si, 3E0h
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| 261 | jne SHORT .Return ; With ZF cleared
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| 262 |
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| 263 | .TryLastAlternative:
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| 264 | mov si, DEVICE_ATA_SECONDARY_PORTCTRL + 8 ; Changes to 370h used by Sound Blaster 16 (CT2290)
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| 265 | ; Fall to .TrySecondAlternative
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| 266 | .TrySecondAlternative:
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| 267 | lea si, [si-8] ; 368h to 360h, 3E8h to 3E0h
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| 268 | .Return:
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| 269 | ret
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| 270 |
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| 271 |
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| 272 | ;--------------------------------------------------------------------
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| 273 | ; IdeAutodetect_IncrementDXtoNextIdeBasePort
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| 274 | ; Parameters:
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| 275 | ; DX: Previous IDE Base Port or IDE_PORT_TO_START_DETECTION
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| 276 | ; Returns:
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| 277 | ; DX: Next IDE Base Port
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| 278 | ; ZF: Set if no more Base Ports (DX was last base port on entry)
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| 279 | ; Clear if new base port returned in DX
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| 280 | ; Corrupts registers:
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| 281 | ; AX
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| 282 | ;--------------------------------------------------------------------
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| 283 | ALIGN JUMP_ALIGN
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| 284 | IdeAutodetect_IncrementDXtoNextIdeBasePort:
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| 285 | cmp dx, [cs:.wLastIdePort]
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| 286 | je SHORT .AllPortsAlreadyDetected
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| 287 |
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| 288 | push si
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| 289 | mov si, .rgwIdeBasePorts
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| 290 | .CompareNextIdeBasePort:
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| 291 | cmp [cs:si], dx
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| 292 | lea si, [si+2] ; Increment SI and preserve FLAGS
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| 293 | jne SHORT .CompareNextIdeBasePort
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| 294 |
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| 295 | mov dx, [cs:si] ; Get next port
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| 296 | test dx, dx ; Clear ZF
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| 297 | pop si
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| 298 | .AllPortsAlreadyDetected:
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| 299 | ret
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| 300 |
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| 301 |
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| 302 | ; All ports used in autodetection. Ports can be in any order.
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| 303 | ALIGN WORD_ALIGN
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| 304 | .rgwIdeBasePorts:
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| 305 | dw IDE_PORT_TO_START_DETECTION ; Must be first
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| 306 | ; Standard IDE
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| 307 | dw DEVICE_ATA_PRIMARY_PORT
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| 308 | dw DEVICE_ATA_SECONDARY_PORT
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| 309 | dw DEVICE_ATA_TERTIARY_PORT
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| 310 | dw DEVICE_ATA_QUATERNARY_PORT
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| 311 | ; 8-bit Devices
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| 312 | dw 200h
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| 313 | dw 220h
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| 314 | dw 240h
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| 315 | dw 260h
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| 316 | dw 280h
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| 317 | dw 2A0h
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| 318 | dw 2C0h
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| 319 | dw 2E0h
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| 320 | dw 300h
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| 321 | dw 320h
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| 322 | dw 340h
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| 323 | dw 360h
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| 324 | dw 380h
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| 325 | dw 3A0h
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| 326 | dw 3C0h
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| 327 | dw 3E0h
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| 328 | ; Arco Computer Products AC-1075 / AC-1070 (16-bit MCA IDE adapters with Control Block at +8 and no IRQ)
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| 329 | dw 2510h
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| 330 | dw 2520h
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| 331 | ; Memory Segment Addresses
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| 332 | dw 0C000h ; JR-IDE/ISA
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| 333 | dw 0C400h ; JR-IDE/ISA
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| 334 | dw 0C800h ; JR-IDE/ISA and ADP50L
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| 335 | dw 0CA00h ; ADP50L
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| 336 | dw 0CC00h ; JR-IDE/ISA and ADP50L
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| 337 | dw 0CE00h ; ADP50L
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| 338 | dw 0D000h ; JR-IDE/ISA
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| 339 | dw 0D400h ; JR-IDE/ISA
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| 340 | dw 0D800h ; JR-IDE/ISA
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| 341 | .wLastIdePort:
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| 342 | dw 0DC00h ; JR-IDE/ISA
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