| 1 | ; Project name : XTIDE Universal BIOS
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| 2 | ; Description : IDE Device Command functions.
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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, 2011-2012 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 | ;--------------------------------------------------------------------
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| 24 | ; IdeCommand_ResetMasterAndSlaveController
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| 25 | ; Parameters:
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| 26 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 27 | ; Returns:
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| 28 | ; AH: INT 13h Error Code
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| 29 | ; CF: Cleared if success, Set if error
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| 30 | ; Corrupts registers:
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| 31 | ; AL, BX, CX, DX
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| 32 | ;--------------------------------------------------------------------
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| 33 | IdeCommand_ResetMasterAndSlaveController:
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| 34 | ; HSR0: Set_SRST
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| 35 | call AccessDPT_GetDeviceControlByteToAL
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| 36 | or al, FLG_DEVCONTROL_SRST | FLG_DEVCONTROL_nIEN ; Set Reset bit
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| 37 | OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out
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| 38 | mov ax, HSR0_RESET_WAIT_US
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| 39 | call Timer_DelayMicrosecondsFromAX
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| 40 |
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| 41 | ; HSR1: Clear_wait
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| 42 | call AccessDPT_GetDeviceControlByteToAL
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| 43 | or al, FLG_DEVCONTROL_nIEN
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| 44 | and al, ~FLG_DEVCONTROL_SRST ; Clear reset bit
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| 45 | OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out
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| 46 | mov ax, HSR1_RESET_WAIT_US
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| 47 | call Timer_DelayMicrosecondsFromAX
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| 48 |
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| 49 | ; HSR2: Check_status
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| 50 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_MAXIMUM, FLG_STATUS_BSY)
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| 51 | jmp IdeWait_PollStatusFlagInBLwithTimeoutInBH
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| 52 |
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| 53 |
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| 54 | ;--------------------------------------------------------------------
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| 55 | ; IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
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| 56 | ; Parameters:
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| 57 | ; BH: Drive Select byte for Drive and Head Select Register
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| 58 | ; DX: Autodetected port for XT-CF
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| 59 | ; DS: Segment to RAMVARS
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| 60 | ; ES:SI: Ptr to buffer to receive 512-byte IDE Information
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| 61 | ; CS:BP: Ptr to IDEVARS
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| 62 | ; Returns:
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| 63 | ; AH: INT 13h Error Code
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| 64 | ; CF: Cleared if success, Set if error
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| 65 | ; Corrupts registers:
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| 66 | ; AL, BX, CX, DX, SI, DI, ES
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| 67 | ;--------------------------------------------------------------------
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| 68 | IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH:
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| 69 | ; Create fake DPT to be able to use Device.asm functions
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| 70 | call FindDPT_ForNewDriveToDSDI
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| 71 | eMOVZX ax, bh
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| 72 | mov [di+DPT.wFlags], ax
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| 73 | call CreateDPT_StoreIdevarsOffsetAndBasePortFromCSBPtoDPTinDSDI
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| 74 | call IdeDPT_StoreDeviceTypeToDPTinDSDIfromIdevarsInCSBP
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| 75 | mov BYTE [di+DPT_ATA.bBlockSize], 1 ; Block = 1 sector
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| 76 |
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| 77 | ; Wait until drive motors have reached full speed
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| 78 | cmp bp, BYTE ROMVARS.ideVars0 ; First controller?
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| 79 | jne SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster
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| 80 | test bh, FLG_DRVNHEAD_DRV ; Wait already done for Master
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| 81 | jnz SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster
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| 82 | call AHDh_WaitUntilDriveMotorHasReachedFullSpeed
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| 83 | .SkipLongWaitSinceDriveIsNotPrimaryMaster:
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| 84 |
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| 85 | ; Create IDEPACK without INTPACK
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| 86 | push bp
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| 87 | call Idepack_FakeToSSBP
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| 88 |
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| 89 | %ifdef MODULE_8BIT_IDE
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| 90 | ; We set XT-CF to 8-bit PIO mode for Identify Device command.
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| 91 | ; Correct XT-CF mode is later set on AH=09h (after all drives are detected).
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| 92 | call AccessDPT_IsThisDeviceXTCF
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| 93 | jne SHORT .SkipXTCFmodeChange
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| 94 |
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| 95 | xor al, al ; XTCF_8BIT_PIO_MODE
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| 96 | push si
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| 97 | call AH1Eh_ChangeXTCFmodeBasedOnControlRegisterInAL
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| 98 | pop si
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| 99 | jc SHORT .FailedToSet8bitMode
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| 100 | .SkipXTCFmodeChange:
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| 101 | %endif ; MODULE_8BIT_IDE
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| 102 |
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| 103 | ; Prepare to output Identify Device command
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| 104 | mov dl, 1 ; Sector count (required by IdeTransfer.asm)
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| 105 | mov al, COMMAND_IDENTIFY_DEVICE
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| 106 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ)
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| 107 | call Idepack_StoreNonExtParametersAndIssueCommandFromAL
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| 108 |
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| 109 | ; Clean stack and return
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| 110 | .FailedToSet8bitMode:
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| 111 | lea sp, [bp+SIZE_OF_IDEPACK_WITHOUT_INTPACK] ; This assumes BP hasn't changed between Idepack_FakeToSSBP and here
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| 112 | pop bp
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| 113 | ret
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| 114 |
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| 115 |
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| 116 | ;--------------------------------------------------------------------
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| 117 | ; IdeCommand_OutputWithParameters
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| 118 | ; Parameters:
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| 119 | ; BH: System timer ticks for timeout
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| 120 | ; BL: IDE Status Register bit to poll after command
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| 121 | ; ES:SI: Ptr to buffer (for data transfer commands)
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| 122 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 123 | ; SS:BP: Ptr to IDEPACK
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| 124 | ; Returns:
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| 125 | ; AH: INT 13h Error Code
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| 126 | ; CX: Number of successfully transferred sectors (for transfer commands)
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| 127 | ; CF: Cleared if success, Set if error
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| 128 | ; Corrupts registers:
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| 129 | ; AL, BX, (CX), DX, (ES:SI for data transfer commands)
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| 130 | ;--------------------------------------------------------------------
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| 131 | ALIGN JUMP_ALIGN
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| 132 | IdeCommand_OutputWithParameters:
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| 133 | push bx ; Store status register bits to poll
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| 134 |
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| 135 | ; Select Master or Slave drive and output head number or LBA28 top bits
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| 136 | call IdeCommand_SelectDrive
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| 137 | jc SHORT .DriveNotReady
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| 138 |
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| 139 | ; Output Device Control Byte to enable or disable interrupts
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| 140 | mov al, [bp+IDEPACK.bDeviceControl]
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| 141 | %ifdef MODULE_IRQ
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| 142 | test al, FLG_DEVCONTROL_nIEN ; Interrupts disabled?
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| 143 | jnz SHORT .DoNotSetInterruptInServiceFlag
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| 144 |
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| 145 | ; Clear Task Flag and set Interrupt In-Service Flag
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| 146 | or BYTE [di+DPT.bFlagsHigh], FLGH_DPT_INTERRUPT_IN_SERVICE
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| 147 | push ds
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| 148 | LOAD_BDA_SEGMENT_TO ds, dx, ! ; Also zero DX
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| 149 | mov [BDA.bHDTaskFlg], dl
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| 150 | pop ds
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| 151 | .DoNotSetInterruptInServiceFlag:
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| 152 | %endif
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| 153 | OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out
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| 154 |
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| 155 | ; Output Feature Number
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| 156 | mov al, [bp+IDEPACK.bFeatures]
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| 157 | OUTPUT_AL_TO_IDE_REGISTER FEATURES_REGISTER_out
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| 158 |
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| 159 | ; Output Sector Address High (only used by LBA48)
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| 160 | %ifdef MODULE_EBIOS
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| 161 | eMOVZX ax, [bp+IDEPACK.bLbaLowExt] ; Zero sector count
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| 162 | mov cx, [bp+IDEPACK.wLbaMiddleAndHighExt]
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| 163 | call OutputSectorCountAndAddress
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| 164 | %endif
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| 165 |
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| 166 | ; Output Sector Address Low
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| 167 | mov ax, [bp+IDEPACK.wSectorCountAndLbaLow]
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| 168 | mov cx, [bp+IDEPACK.wLbaMiddleAndHigh]
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| 169 | call OutputSectorCountAndAddress
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| 170 |
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| 171 | ; Output command
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| 172 | mov al, [bp+IDEPACK.bCommand]
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| 173 | OUTPUT_AL_TO_IDE_REGISTER COMMAND_REGISTER_out
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| 174 |
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| 175 | ; Wait until command completed
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| 176 | pop bx ; Pop status and timeout for polling
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| 177 | cmp bl, FLG_STATUS_DRQ ; Data transfer started?
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| 178 | jne SHORT .WaitUntilNonTransferCommandCompletes
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| 179 | %ifdef MODULE_8BIT_IDE
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| 180 | cmp BYTE [di+DPT_ATA.bDevice], DEVICE_8BIT_XTCF_DMA
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| 181 | je SHORT 0 ; IdeDma_StartTransferWithCommandInAL
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| 182 | ja SHORT JrIdeTransfer_StartWithCommandInAL ; DEVICE_8BIT_XTCF_MEMMAP or DEVICE_8BIT_JRIDE_ISA
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| 183 | %endif
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| 184 | jmp IdeTransfer_StartWithCommandInAL
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| 185 |
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| 186 | .WaitUntilNonTransferCommandCompletes:
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| 187 | %ifdef MODULE_IRQ
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| 188 | test BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN
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| 189 | jz SHORT .PollStatusFlagInsteadOfWaitIrq
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| 190 | jmp IdeWait_IRQorStatusFlagInBLwithTimeoutInBH
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| 191 | .PollStatusFlagInsteadOfWaitIrq:
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| 192 | %endif
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| 193 | jmp IdeWait_PollStatusFlagInBLwithTimeoutInBH
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| 194 |
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| 195 | .DriveNotReady:
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| 196 | pop bx ; Clean stack
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| 197 | ret
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| 198 |
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| 199 |
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| 200 | ;--------------------------------------------------------------------
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| 201 | ; IdeCommand_SelectDrive
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| 202 | ; Parameters:
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| 203 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 204 | ; SS:BP: Ptr to IDEPACK
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| 205 | ; Returns:
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| 206 | ; AH: INT 13h Error Code
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| 207 | ; CF: Cleared if success, Set if error
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| 208 | ; Corrupts registers:
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| 209 | ; AL, BX, CX, DX
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| 210 | ;--------------------------------------------------------------------
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| 211 | ALIGN JUMP_ALIGN
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| 212 | IdeCommand_SelectDrive:
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| 213 | ; We use different timeout value when detecting drives.
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| 214 | ; This prevents unnecessary long delays when drive is not present.
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| 215 | mov cx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY)
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| 216 | cmp WORD [RAMVARS.wDrvDetectSignature], RAMVARS_DRV_DETECT_SIGNATURE
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| 217 | eCMOVE ch, TIMEOUT_SELECT_DRIVE_DURING_DRIVE_DETECTION
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| 218 |
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| 219 | ; Select Master or Slave Drive
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| 220 | mov al, [bp+IDEPACK.bDrvAndHead]
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| 221 | OUTPUT_AL_TO_IDE_REGISTER DRIVE_AND_HEAD_SELECT_REGISTER
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| 222 | mov bx, cx
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| 223 | call IdeWait_PollStatusFlagInBLwithTimeoutInBH
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| 224 |
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| 225 | ; Ignore errors from IDE Error Register (set by previous command)
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| 226 | cmp ah, RET_HD_TIMEOUT
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| 227 | je SHORT .FailedToSelectDrive
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| 228 | xor ax, ax ; Always success unless timeout
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| 229 | ret
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| 230 | .FailedToSelectDrive:
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| 231 | stc
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| 232 | ret
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| 233 |
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| 234 |
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| 235 | ;--------------------------------------------------------------------
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| 236 | ; OutputSectorCountAndAddress
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| 237 | ; Parameters:
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| 238 | ; AH: LBA low bits (Sector Number)
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| 239 | ; AL: Sector Count
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| 240 | ; CL: LBA middle bits (Cylinder Number low)
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| 241 | ; CH: LBA high bits (Cylinder Number high)
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| 242 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 243 | ; Returns:
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| 244 | ; Nothing
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| 245 | ; Corrupts registers:
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| 246 | ; AL, BX, DX
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| 247 | ;--------------------------------------------------------------------
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| 248 | ALIGN JUMP_ALIGN
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| 249 | OutputSectorCountAndAddress:
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| 250 | OUTPUT_AL_TO_IDE_REGISTER SECTOR_COUNT_REGISTER
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| 251 |
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| 252 | mov al, ah
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| 253 | OUTPUT_AL_TO_IDE_REGISTER LBA_LOW_REGISTER
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| 254 |
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| 255 | mov al, cl
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| 256 | OUTPUT_AL_TO_IDE_REGISTER LBA_MIDDLE_REGISTER
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| 257 |
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| 258 | mov al, ch
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| 259 | OUTPUT_AL_TO_IDE_REGISTER LBA_HIGH_REGISTER
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| 260 | ret
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