[150] | 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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[238] | 17 | IDEDEVICE%+Command_ResetMasterAndSlaveController: |
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[150] | 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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[267] | 21 | OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out |
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[150] | 22 | mov ax, HSR0_RESET_WAIT_US |
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[155] | 23 | call Timer_DelayMicrosecondsFromAX |
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[150] | 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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[267] | 29 | OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out |
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[150] | 30 | mov ax, HSR1_RESET_WAIT_US |
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[155] | 31 | call Timer_DelayMicrosecondsFromAX |
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[150] | 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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[238] | 35 | jmp IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH |
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[150] | 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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[238] | 51 | IDEDEVICE%+Command_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH: |
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[150] | 52 | ; Create fake DPT to be able to use Device.asm functions |
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| 53 | call FindDPT_ForNewDriveToDSDI |
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[158] | 54 | eMOVZX ax, bh |
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[150] | 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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[266] | 58 | %ifdef ASSEMBLE_SHARED_IDE_DEVICE_FUNCTIONS |
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[160] | 59 | call IdeDPT_StoreReversedAddressLinesFlagIfNecessary |
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[266] | 60 | %endif |
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[150] | 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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[158] | 65 | test al, FLG_DRVNHEAD_DRV |
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[150] | 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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[238] | 68 | call IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH |
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[150] | 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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[158] | 82 | lea sp, [bp+EXTRA_BYTES_FOR_INTPACK] ; This assumes BP hasn't changed between Idepack_FakeToSSBP and here |
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[150] | 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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[249] | 97 | ; CX: Number of successfully transferred sectors (for transfer commands) |
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[150] | 98 | ; CF: Cleared if success, Set if error |
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| 99 | ; Corrupts registers: |
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[249] | 100 | ; AL, BX, (CX), DX, (ES:SI for data transfer commands) |
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[150] | 101 | ;-------------------------------------------------------------------- |
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| 102 | ALIGN JUMP_ALIGN |
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[238] | 103 | IDEDEVICE%+Command_OutputWithParameters: |
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[158] | 104 | push bx ; Store status register bits to poll |
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[150] | 105 | |
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| 106 | ; Select Master or Slave drive and output head number or LBA28 top bits |
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[238] | 107 | call IDEDEVICE%+Command_SelectDrive |
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[150] | 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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[266] | 112 | %ifdef ASSEMBLE_SHARED_IDE_DEVICE_FUNCTIONS ; JR-IDE/ISA |
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[158] | 113 | test al, FLG_DEVCONTROL_nIEN ; Interrupts disabled? |
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[152] | 114 | jnz SHORT .DoNotSetInterruptInServiceFlag |
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[158] | 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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[152] | 118 | push ds |
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[158] | 119 | LOAD_BDA_SEGMENT_TO ds, dx, ! ; Also zero DX |
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| 120 | mov [BDA.bHDTaskFlg], dl |
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[152] | 121 | pop ds |
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| 122 | .DoNotSetInterruptInServiceFlag: |
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[266] | 123 | %endif |
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[267] | 124 | OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out |
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[150] | 125 | |
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| 126 | ; Output Feature Number |
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| 127 | mov al, [bp+IDEPACK.bFeatures] |
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[267] | 128 | OUTPUT_AL_TO_IDE_REGISTER FEATURES_REGISTER_out |
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[150] | 129 | |
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| 130 | ; Output Sector Address High (only used by LBA48) |
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[276] | 131 | eMOVZX ax, BYTE [bp+IDEPACK.bLbaLowExt] ; Zero sector count |
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[150] | 132 | mov cx, [bp+IDEPACK.wLbaMiddleAndHighExt] |
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[266] | 133 | call IDEDEVICE%+OutputSectorCountAndAddress |
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[150] | 134 | |
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| 135 | ; Output Sector Address Low |
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| 136 | mov ax, [bp+IDEPACK.wSectorCountAndLbaLow] |
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| 137 | mov cx, [bp+IDEPACK.wLbaMiddleAndHigh] |
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[266] | 138 | call IDEDEVICE%+OutputSectorCountAndAddress |
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[150] | 139 | |
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| 140 | ; Output command |
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| 141 | mov al, [bp+IDEPACK.bCommand] |
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[267] | 142 | OUTPUT_AL_TO_IDE_REGISTER COMMAND_REGISTER_out |
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[150] | 143 | |
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| 144 | ; Wait until command completed |
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[158] | 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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[238] | 147 | je SHORT IDEDEVICE%+Transfer_StartWithCommandInAL |
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[150] | 148 | test BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN |
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| 149 | jz SHORT .WaitForIrqOrRdy |
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[238] | 150 | jmp IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH |
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[150] | 151 | |
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| 152 | ALIGN JUMP_ALIGN |
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| 153 | .WaitForIrqOrRdy: |
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[238] | 154 | jmp IDEDEVICE%+Wait_IRQorStatusFlagInBLwithTimeoutInBH |
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[150] | 155 | |
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| 156 | .DriveNotReady: |
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| 157 | pop bx ; Clean stack |
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| 158 | ret |
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| 159 | |
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| 160 | |
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| 161 | ;-------------------------------------------------------------------- |
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| 162 | ; IdeCommand_SelectDrive |
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| 163 | ; Parameters: |
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| 164 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 165 | ; SS:BP: Ptr to IDEPACK |
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| 166 | ; Returns: |
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| 167 | ; AH: INT 13h Error Code |
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| 168 | ; CF: Cleared if success, Set if error |
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| 169 | ; Corrupts registers: |
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| 170 | ; AL, BX, CX, DX |
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| 171 | ;-------------------------------------------------------------------- |
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| 172 | ALIGN JUMP_ALIGN |
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[238] | 173 | IDEDEVICE%+Command_SelectDrive: |
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[279] | 174 | ; Wait until neither Master or Slave Drive is busy. |
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| 175 | ; I don't think this wait is necessary. |
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| 176 | ;mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_BSY, FLG_STATUS_BSY) |
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| 177 | ;cmp BYTE [bp+IDEPACK.bCommand], COMMAND_IDENTIFY_DEVICE |
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| 178 | ;eCMOVE bh, TIMEOUT_IDENTIFY_DEVICE |
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| 179 | ;call IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH |
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[150] | 180 | |
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| 181 | ; Select Master or Slave Drive |
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| 182 | mov al, [bp+IDEPACK.bDrvAndHead] |
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[267] | 183 | OUTPUT_AL_TO_IDE_REGISTER DRIVE_AND_HEAD_SELECT_REGISTER |
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[150] | 184 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY) |
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| 185 | cmp BYTE [bp+IDEPACK.bCommand], COMMAND_IDENTIFY_DEVICE |
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[158] | 186 | eCMOVE bh, TIMEOUT_IDENTIFY_DEVICE |
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[279] | 187 | call IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH |
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| 188 | jc SHORT .ErrorWhenSelectingMasterOrSlave |
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| 189 | ret |
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[150] | 190 | |
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[281] | 191 | ; Ignore errors from IDE Error Register (set by previous command) |
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[279] | 192 | .ErrorWhenSelectingMasterOrSlave: |
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[281] | 193 | cmp ah, RET_HD_TIMEOUT ; Do not ignore timeout |
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| 194 | stc |
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| 195 | je SHORT .ReturnWithErrorCodeInAHandCF |
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| 196 | xor ah, ah ; No errors |
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| 197 | .ReturnWithErrorCodeInAHandCF: |
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[279] | 198 | ret |
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[150] | 199 | |
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[279] | 200 | |
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[150] | 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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[266] | 215 | IDEDEVICE%+OutputSectorCountAndAddress: |
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[267] | 216 | OUTPUT_AL_TO_IDE_REGISTER SECTOR_COUNT_REGISTER |
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[150] | 217 | |
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| 218 | mov al, ah |
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[267] | 219 | OUTPUT_AL_TO_IDE_REGISTER LBA_LOW_REGISTER |
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[150] | 220 | |
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| 221 | mov al, cl |
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[267] | 222 | OUTPUT_AL_TO_IDE_REGISTER LBA_MIDDLE_REGISTER |
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[150] | 223 | |
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| 224 | mov al, ch |
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[267] | 225 | JUMP_TO_OUTPUT_AL_TO_IDE_REGISTER LBA_HIGH_REGISTER |
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