| 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 | IDEDEVICE%+Command_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 | OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out
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| 22 | mov ax, HSR0_RESET_WAIT_US
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| 23 | call Timer_DelayMicrosecondsFromAX
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| 24 |
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| 25 | ; HSR1: Clear_wait
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| 26 | call AccessDPT_GetDeviceControlByteToAL
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| 27 | or al, FLG_DEVCONTROL_nIEN
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| 28 | and al, ~FLG_DEVCONTROL_SRST ; Clear reset bit
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| 29 | OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out
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| 30 | mov ax, HSR1_RESET_WAIT_US
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| 31 | call Timer_DelayMicrosecondsFromAX
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| 32 |
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| 33 | ; HSR2: Check_status
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| 34 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_MOTOR_STARTUP, FLG_STATUS_BSY)
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| 35 | jmp IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH
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| 36 |
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| 37 |
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| 38 | ;--------------------------------------------------------------------
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| 39 | ; IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
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| 40 | ; Parameters:
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| 41 | ; BH: Drive Select byte for Drive and Head Select Register
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| 42 | ; DS: Segment to RAMVARS
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| 43 | ; ES:SI: Ptr to buffer to receive 512-byte IDE Information
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| 44 | ; CS:BP: Ptr to IDEVARS
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| 45 | ; Returns:
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| 46 | ; AH: INT 13h Error Code
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| 47 | ; CF: Cleared if success, Set if error
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| 48 | ; Corrupts registers:
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| 49 | ; AL, BL, CX, DX, SI, DI, ES
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| 50 | ;--------------------------------------------------------------------
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| 51 | IDEDEVICE%+Command_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH:
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| 52 | ; Create fake DPT to be able to use Device.asm functions
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| 53 | call FindDPT_ForNewDriveToDSDI
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| 54 | eMOVZX ax, bh
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| 55 | mov [di+DPT.wFlags], ax
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| 56 | mov [di+DPT.bIdevarsOffset], bp
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| 57 | mov BYTE [di+DPT_ATA.bSetBlock], 1 ; Block = 1 sector
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| 58 | %ifdef ASSEMBLE_SHARED_IDE_DEVICE_FUNCTIONS
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| 59 | call IdeDPT_StoreReversedAddressLinesFlagIfNecessary
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| 60 | %endif
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| 61 |
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| 62 | ; Wait until drive motors have reached max speed
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| 63 | cmp bp, BYTE ROMVARS.ideVars0
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| 64 | jne SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster
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| 65 | test al, FLG_DRVNHEAD_DRV
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| 66 | jnz SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster
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| 67 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_MOTOR_STARTUP, FLG_STATUS_BSY)
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| 68 | call IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH
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| 69 | .SkipLongWaitSinceDriveIsNotPrimaryMaster:
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| 70 |
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| 71 | ; Create IDEPACK without INTPACK
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| 72 | push bp
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| 73 | call Idepack_FakeToSSBP
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| 74 |
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| 75 | ; Prepare to output Identify Device command
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| 76 | mov dl, 1 ; Sector count (required by IdeTransfer.asm)
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| 77 | mov al, COMMAND_IDENTIFY_DEVICE
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| 78 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_IDENTIFY_DEVICE, FLG_STATUS_DRQ)
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| 79 | call Idepack_StoreNonExtParametersAndIssueCommandFromAL
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| 80 |
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| 81 | ; Clean stack and return
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| 82 | lea sp, [bp+EXTRA_BYTES_FOR_INTPACK] ; This assumes BP hasn't changed between Idepack_FakeToSSBP and here
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| 83 | pop bp
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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 | ; IdeCommand_OutputWithParameters
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| 89 | ; Parameters:
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| 90 | ; BH: System timer ticks for timeout
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| 91 | ; BL: IDE Status Register bit to poll after command
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| 92 | ; ES:SI: Ptr to buffer (for data transfer commands)
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| 93 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 94 | ; SS:BP: Ptr to IDEPACK
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| 95 | ; Returns:
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| 96 | ; AH: INT 13h Error Code
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| 97 | ; CX: Number of successfully transferred sectors (for transfer commands)
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| 98 | ; CF: Cleared if success, Set if error
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| 99 | ; Corrupts registers:
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| 100 | ; AL, BX, (CX), DX, (ES:SI for data transfer commands)
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| 101 | ;--------------------------------------------------------------------
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| 102 | ALIGN JUMP_ALIGN
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| 103 | IDEDEVICE%+Command_OutputWithParameters:
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| 104 | push bx ; Store status register bits to poll
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| 105 |
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| 106 | ; Select Master or Slave drive and output head number or LBA28 top bits
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| 107 | call IDEDEVICE%+Command_SelectDrive
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| 108 | jc SHORT .DriveNotReady
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| 109 |
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| 110 | ; Output Device Control Byte to enable or disable interrupts
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| 111 | mov al, [bp+IDEPACK.bDeviceControl]
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| 112 | %ifdef ASSEMBLE_SHARED_IDE_DEVICE_FUNCTIONS ; JR-IDE/ISA
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| 113 | test al, FLG_DEVCONTROL_nIEN ; Interrupts disabled?
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| 114 | jnz SHORT .DoNotSetInterruptInServiceFlag
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| 115 |
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| 116 | ; Clear Task Flag and set Interrupt In-Service Flag
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| 117 | or BYTE [di+DPT.bFlagsHigh], FLGH_DPT_INTERRUPT_IN_SERVICE
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| 118 | push ds
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| 119 | LOAD_BDA_SEGMENT_TO ds, dx, ! ; Also zero DX
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| 120 | mov [BDA.bHDTaskFlg], dl
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| 121 | pop ds
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| 122 | .DoNotSetInterruptInServiceFlag:
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| 123 | %endif
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| 124 | OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out
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| 125 |
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| 126 | ; Output Feature Number
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| 127 | mov al, [bp+IDEPACK.bFeatures]
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| 128 | OUTPUT_AL_TO_IDE_REGISTER FEATURES_REGISTER_out
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| 129 |
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| 130 | ; Output Sector Address High (only used by LBA48)
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| 131 | %ifdef MODULE_EBIOS
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| 132 | eMOVZX ax, BYTE [bp+IDEPACK.bLbaLowExt] ; Zero sector count
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| 133 | mov cx, [bp+IDEPACK.wLbaMiddleAndHighExt]
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| 134 | call IDEDEVICE%+OutputSectorCountAndAddress
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| 135 | %endif
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| 136 |
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| 137 | ; Output Sector Address Low
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| 138 | mov ax, [bp+IDEPACK.wSectorCountAndLbaLow]
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| 139 | mov cx, [bp+IDEPACK.wLbaMiddleAndHigh]
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| 140 | call IDEDEVICE%+OutputSectorCountAndAddress
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| 141 |
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| 142 | ; Output command
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| 143 | mov al, [bp+IDEPACK.bCommand]
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| 144 | OUTPUT_AL_TO_IDE_REGISTER COMMAND_REGISTER_out
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| 145 |
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| 146 | ; Wait until command completed
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| 147 | pop bx ; Pop status and timeout for polling
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| 148 | cmp bl, FLG_STATUS_DRQ ; Data transfer started?
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| 149 | je SHORT IDEDEVICE%+Transfer_StartWithCommandInAL
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| 150 | test BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN
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| 151 | jz SHORT .WaitForIrqOrRdy
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| 152 | jmp IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH
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| 153 |
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| 154 | ALIGN JUMP_ALIGN
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| 155 | .WaitForIrqOrRdy:
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| 156 | jmp IDEDEVICE%+Wait_IRQorStatusFlagInBLwithTimeoutInBH
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| 157 |
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| 158 | .DriveNotReady:
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| 159 | pop bx ; Clean stack
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| 160 | ret
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| 161 |
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| 162 |
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| 163 | ;--------------------------------------------------------------------
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| 164 | ; IdeCommand_SelectDrive
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| 165 | ; Parameters:
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| 166 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 167 | ; SS:BP: Ptr to IDEPACK
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| 168 | ; Returns:
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| 169 | ; AH: INT 13h Error Code
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| 170 | ; CF: Cleared if success, Set if error
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| 171 | ; Corrupts registers:
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| 172 | ; AL, BX, CX, DX
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| 173 | ;--------------------------------------------------------------------
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| 174 | ALIGN JUMP_ALIGN
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| 175 | IDEDEVICE%+Command_SelectDrive:
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| 176 | ; Wait until neither Master or Slave Drive is busy.
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| 177 | ; I don't think this wait is necessary.
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| 178 | ;mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_BSY, FLG_STATUS_BSY)
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| 179 | ;cmp BYTE [bp+IDEPACK.bCommand], COMMAND_IDENTIFY_DEVICE
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| 180 | ;eCMOVE bh, TIMEOUT_IDENTIFY_DEVICE
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| 181 | ;call IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH
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| 182 |
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| 183 | ; Select Master or Slave Drive
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| 184 | mov al, [bp+IDEPACK.bDrvAndHead]
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| 185 | OUTPUT_AL_TO_IDE_REGISTER DRIVE_AND_HEAD_SELECT_REGISTER
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| 186 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY)
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| 187 | cmp BYTE [bp+IDEPACK.bCommand], COMMAND_IDENTIFY_DEVICE
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| 188 | eCMOVE bh, TIMEOUT_IDENTIFY_DEVICE
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| 189 | call IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH
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| 190 |
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| 191 | ; Ignore errors from IDE Error Register (set by previous command)
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| 192 | cmp ah, RET_HD_TIMEOUT
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| 193 | je SHORT .FailedToSelectDrive
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| 194 | xor ax, ax ; Always success unless timeout
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| 195 | ret
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| 196 | .FailedToSelectDrive:
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| 197 | stc
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| 198 | ret
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| 199 |
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| 200 |
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| 201 | ;--------------------------------------------------------------------
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| 202 | ; OutputSectorCountAndAddress
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| 203 | ; Parameters:
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| 204 | ; AH: LBA low bits (Sector Number)
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| 205 | ; AL: Sector Count
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| 206 | ; CL: LBA middle bits (Cylinder Number low)
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| 207 | ; CH: LBA high bits (Cylinder Number high)
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| 208 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 209 | ; Returns:
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| 210 | ; Nothing
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| 211 | ; Corrupts registers:
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| 212 | ; AL, BX, DX
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| 213 | ;--------------------------------------------------------------------
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| 214 | ALIGN JUMP_ALIGN
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| 215 | IDEDEVICE%+OutputSectorCountAndAddress:
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| 216 | OUTPUT_AL_TO_IDE_REGISTER SECTOR_COUNT_REGISTER
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| 217 |
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| 218 | mov al, ah
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| 219 | OUTPUT_AL_TO_IDE_REGISTER LBA_LOW_REGISTER
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| 220 |
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| 221 | mov al, cl
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| 222 | OUTPUT_AL_TO_IDE_REGISTER LBA_MIDDLE_REGISTER
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| 223 |
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| 224 | mov al, ch
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| 225 | JUMP_TO_OUTPUT_AL_TO_IDE_REGISTER LBA_HIGH_REGISTER
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