| 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 | ; Section containing code
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| 5 | SECTION .text
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| 6 |
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| 7 | ;--------------------------------------------------------------------
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| 8 | ; IdeCommand_ResetMasterAndSlaveController
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| 9 | ; Parameters:
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| 10 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 11 | ; Returns:
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| 12 | ; AH: INT 13h Error Code
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| 13 | ; CF: Cleared if success, Set if error
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| 14 | ; Corrupts registers:
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| 15 | ; AL, BX, CX, DX
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| 16 | ;--------------------------------------------------------------------
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| 17 | IdeCommand_ResetMasterAndSlaveController:
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| 18 | ; HSR0: Set_SRST
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| 19 | call AccessDPT_GetDeviceControlByteToAL
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| 20 | or al, FLG_DEVCONTROL_SRST | FLG_DEVCONTROL_nIEN ; Set Reset bit
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| 21 | mov dl, DEVICE_CONTROL_REGISTER_out
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| 22 | call Device_OutputALtoIdeControlBlockRegisterInDL
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| 23 | mov ax, HSR0_RESET_WAIT_US
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| 24 | call Timer_DelayMicrosecondsFromAX
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| 25 |
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| 26 | ; HSR1: Clear_wait
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| 27 | call AccessDPT_GetDeviceControlByteToAL
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| 28 | or al, FLG_DEVCONTROL_nIEN
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| 29 | and al, ~FLG_DEVCONTROL_SRST ; Clear reset bit
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| 30 | mov dl, DEVICE_CONTROL_REGISTER_out
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| 31 | call Device_OutputALtoIdeControlBlockRegisterInDL
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| 32 | mov ax, HSR1_RESET_WAIT_US
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| 33 | call Timer_DelayMicrosecondsFromAX
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| 34 |
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| 35 | ; HSR2: Check_status
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| 36 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_MOTOR_STARTUP, FLG_STATUS_BSY)
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| 37 | jmp IdeWait_PollStatusFlagInBLwithTimeoutInBH
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| 38 |
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| 39 |
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| 40 | ;--------------------------------------------------------------------
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| 41 | ; IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
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| 42 | ; Parameters:
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| 43 | ; BH: Drive Select byte for Drive and Head Select Register
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| 44 | ; DS: Segment to RAMVARS
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| 45 | ; ES:SI: Ptr to buffer to receive 512-byte IDE Information
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| 46 | ; CS:BP: Ptr to IDEVARS
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| 47 | ; Returns:
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| 48 | ; AH: INT 13h Error Code
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| 49 | ; CF: Cleared if success, Set if error
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| 50 | ; Corrupts registers:
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| 51 | ; AL, BL, CX, DX, SI, DI, ES
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| 52 | ;--------------------------------------------------------------------
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| 53 | IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH:
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| 54 | ; Create fake DPT to be able to use Device.asm functions
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| 55 | call FindDPT_ForNewDriveToDSDI
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| 56 | xor ax, ax
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| 57 | cmp BYTE [cs:bp+IDEVARS.bDevice], DEVICE_XTIDE_WITH_REVERSED_A3_AND_A0
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| 58 | eCMOVE ax, FLG_DPT_REVERSED_A0_AND_A3
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| 59 | or al, bh
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| 60 | mov [di+DPT.wFlags], ax
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| 61 | mov [di+DPT.bIdevarsOffset], bp
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| 62 | mov BYTE [di+DPT_ATA.bSetBlock], 1 ; Block = 1 sector
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| 63 |
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| 64 | ; Wait until drive motors have reached max speed
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| 65 | cmp bp, BYTE ROMVARS.ideVars0
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| 66 | jne SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster
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| 67 | test bh, FLG_DRVNHEAD_DRV
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| 68 | jnz SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster
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| 69 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_MOTOR_STARTUP, FLG_STATUS_BSY)
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| 70 | call IdeWait_PollStatusFlagInBLwithTimeoutInBH
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| 71 | .SkipLongWaitSinceDriveIsNotPrimaryMaster:
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| 72 |
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| 73 | ; Create IDEPACK without INTPACK
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| 74 | push bp
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| 75 | call Idepack_FakeToSSBP
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| 76 |
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| 77 | ; Prepare to output Identify Device command
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| 78 | mov dl, 1 ; Sector count (required by IdeTransfer.asm)
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| 79 | mov al, COMMAND_IDENTIFY_DEVICE
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| 80 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_IDENTIFY_DEVICE, FLG_STATUS_DRQ)
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| 81 | call Idepack_StoreNonExtParametersAndIssueCommandFromAL
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| 82 |
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| 83 | ; Clean stack and return
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| 84 | lea sp, [bp+SIZE_OF_FAKE_IDEPACK] ; This assumes BP hasn't changed between Idepack_FakeToSSBP and here
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| 85 | pop bp
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| 86 | ret
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| 87 |
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| 88 |
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| 89 | ;--------------------------------------------------------------------
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| 90 | ; IdeCommand_OutputWithParameters
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| 91 | ; Parameters:
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| 92 | ; BH: System timer ticks for timeout
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| 93 | ; BL: IDE Status Register bit to poll after command
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| 94 | ; ES:SI: Ptr to buffer (for data transfer commands)
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| 95 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 96 | ; SS:BP: Ptr to IDEPACK
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| 97 | ; Returns:
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| 98 | ; AH: INT 13h Error Code
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| 99 | ; CF: Cleared if success, Set if error
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| 100 | ; Corrupts registers:
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| 101 | ; AL, BX, CX, DX, (ES:SI for data transfer commands)
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| 102 | ;--------------------------------------------------------------------
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| 103 | ALIGN JUMP_ALIGN
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| 104 | IdeCommand_OutputWithParameters:
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| 105 | push bx ; Store status register bits to poll
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| 106 |
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| 107 | ; Select Master or Slave drive and output head number or LBA28 top bits
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| 108 | call IdeCommand_SelectDrive
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| 109 | jc SHORT .DriveNotReady
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| 110 |
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| 111 | ; Output Device Control Byte to enable or disable interrupts
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| 112 | mov dl, DEVICE_CONTROL_REGISTER_out
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| 113 | mov al, [bp+IDEPACK.bDeviceControl]
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| 114 | test al, FLG_DEVCONTROL_nIEN
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| 115 | jnz SHORT .DoNotSetInterruptInServiceFlag
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| 116 | or WORD [di+DPT.wFlags], FLG_DPT_INTERRUPT_IN_SERVICE
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| 117 | push ds
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| 118 | LOAD_BDA_SEGMENT_TO ds, cx, ! ; Also zero CX
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| 119 | mov [BDA.bHDTaskFlg], al
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| 120 | pop ds
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| 121 | .DoNotSetInterruptInServiceFlag:
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| 122 | call Device_OutputALtoIdeControlBlockRegisterInDL
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| 123 |
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| 124 | ; Output Feature Number
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| 125 | mov dl, FEATURES_REGISTER_out
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| 126 | mov al, [bp+IDEPACK.bFeatures]
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| 127 | call Device_OutputALtoIdeRegisterInDL
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| 128 |
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| 129 | ; Output Sector Address High (only used by LBA48)
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| 130 | mov ax, [bp+IDEPACK.wSectorCountHighAndLbaLowExt]
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| 131 | mov cx, [bp+IDEPACK.wLbaMiddleAndHighExt]
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| 132 | call OutputSectorCountAndAddress
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| 133 |
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| 134 | ; Output Sector Address Low
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| 135 | mov ax, [bp+IDEPACK.wSectorCountAndLbaLow]
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| 136 | mov cx, [bp+IDEPACK.wLbaMiddleAndHigh]
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| 137 | call OutputSectorCountAndAddress
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| 138 |
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| 139 | ; Output command
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| 140 | mov dl, COMMAND_REGISTER_out
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| 141 | mov al, [bp+IDEPACK.bCommand]
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| 142 | call Device_OutputALtoIdeRegisterInDL
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| 143 |
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| 144 | ; Wait until command completed
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| 145 | pop bx ; Pop status and timeout for polling
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| 146 | cmp bl, FLG_STATUS_DRQ ; Data transfer started?
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| 147 | je SHORT .StartDataTransfer
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| 148 | test BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN
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| 149 | jz SHORT .WaitForIrqOrRdy
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| 150 | jmp IdeWait_PollStatusFlagInBLwithTimeoutInBH
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| 151 |
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| 152 | ALIGN JUMP_ALIGN
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| 153 | .WaitForIrqOrRdy:
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| 154 | jmp IdeWait_IRQorStatusFlagInBLwithTimeoutInBH
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| 155 | ALIGN JUMP_ALIGN
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| 156 | .StartDataTransfer:
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| 157 | jmp IdeTransfer_StartWithCommandInAL
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| 158 |
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| 159 | .DriveNotReady:
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| 160 | pop bx ; Clean stack
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| 161 | ReturnSinceTimeoutWhenPollingBusy:
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| 162 | ret
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| 163 |
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| 164 |
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| 165 | ;--------------------------------------------------------------------
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| 166 | ; IdeCommand_SelectDrive
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| 167 | ; Parameters:
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| 168 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 169 | ; SS:BP: Ptr to IDEPACK
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| 170 | ; Returns:
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| 171 | ; AH: INT 13h Error Code
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| 172 | ; CF: Cleared if success, Set if error
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| 173 | ; Corrupts registers:
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| 174 | ; AL, BX, CX, DX
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| 175 | ;--------------------------------------------------------------------
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| 176 | ALIGN JUMP_ALIGN
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| 177 | IdeCommand_SelectDrive:
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| 178 | ; Wait until neither Master or Slave Drive is busy
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| 179 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_BSY, FLG_STATUS_BSY)
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| 180 | cmp BYTE [bp+IDEPACK.bCommand], COMMAND_IDENTIFY_DEVICE
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| 181 | eCMOVE bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_IDENTIFY_DEVICE, FLG_STATUS_BSY)
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| 182 | call IdeWait_PollStatusFlagInBLwithTimeoutInBH
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| 183 | jc SHORT ReturnSinceTimeoutWhenPollingBusy
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| 184 |
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| 185 | ; Select Master or Slave Drive
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| 186 | mov dl, DRIVE_AND_HEAD_SELECT_REGISTER
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| 187 | mov al, [bp+IDEPACK.bDrvAndHead]
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| 188 | call Device_OutputALtoIdeRegisterInDL
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| 189 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY)
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| 190 | cmp BYTE [bp+IDEPACK.bCommand], COMMAND_IDENTIFY_DEVICE
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| 191 | eCMOVE bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_IDENTIFY_DEVICE, FLG_STATUS_DRDY)
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| 192 | jmp IdeWait_PollStatusFlagInBLwithTimeoutInBH
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| 193 |
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| 194 |
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| 195 | ;--------------------------------------------------------------------
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| 196 | ; OutputSectorCountAndAddress
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| 197 | ; Parameters:
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| 198 | ; AH: LBA low bits (Sector Number)
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| 199 | ; AL: Sector Count
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| 200 | ; CL: LBA middle bits (Cylinder Number low)
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| 201 | ; CH: LBA high bits (Cylinder Number high)
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| 202 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 203 | ; Returns:
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| 204 | ; Nothing
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| 205 | ; Corrupts registers:
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| 206 | ; AL, BX, DX
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| 207 | ;--------------------------------------------------------------------
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| 208 | ALIGN JUMP_ALIGN
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| 209 | OutputSectorCountAndAddress:
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| 210 | mov dl, SECTOR_COUNT_REGISTER
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| 211 | call Device_OutputALtoIdeRegisterInDL
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| 212 |
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| 213 | mov al, ah
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| 214 | mov dl, LBA_LOW_REGISTER
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| 215 | call Device_OutputALtoIdeRegisterInDL
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| 216 |
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| 217 | mov al, cl
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| 218 | mov dl, LBA_MIDDLE_REGISTER
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| 219 | call Device_OutputALtoIdeRegisterInDL
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| 220 |
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| 221 | mov al, ch
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| 222 | mov dl, LBA_HIGH_REGISTER
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| 223 | jmp Device_OutputALtoIdeRegisterInDL
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