[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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| 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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[160] | 22 | call IdeIO_OutputALtoIdeControlBlockRegisterInDL |
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[150] | 23 | mov ax, HSR0_RESET_WAIT_US |
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[155] | 24 | call Timer_DelayMicrosecondsFromAX |
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[150] | 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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[160] | 31 | call IdeIO_OutputALtoIdeControlBlockRegisterInDL |
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[150] | 32 | mov ax, HSR1_RESET_WAIT_US |
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[155] | 33 | call Timer_DelayMicrosecondsFromAX |
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[150] | 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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[158] | 56 | eMOVZX ax, bh |
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[150] | 57 | mov [di+DPT.wFlags], ax |
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| 58 | mov [di+DPT.bIdevarsOffset], bp |
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| 59 | mov BYTE [di+DPT_ATA.bSetBlock], 1 ; Block = 1 sector |
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[160] | 60 | call IdeDPT_StoreReversedAddressLinesFlagIfNecessary |
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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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| 68 | call IdeWait_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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[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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| 97 | ; CF: Cleared if success, Set if error |
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| 98 | ; Corrupts registers: |
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| 99 | ; AL, BX, CX, DX, (ES:SI for data transfer commands) |
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| 100 | ;-------------------------------------------------------------------- |
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| 101 | ALIGN JUMP_ALIGN |
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| 102 | IdeCommand_OutputWithParameters: |
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[158] | 103 | push bx ; Store status register bits to poll |
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[150] | 104 | |
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| 105 | ; Select Master or Slave drive and output head number or LBA28 top bits |
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| 106 | call IdeCommand_SelectDrive |
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| 107 | jc SHORT .DriveNotReady |
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| 108 | |
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| 109 | ; Output Device Control Byte to enable or disable interrupts |
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| 110 | mov al, [bp+IDEPACK.bDeviceControl] |
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[158] | 111 | test al, FLG_DEVCONTROL_nIEN ; Interrupts disabled? |
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[152] | 112 | jnz SHORT .DoNotSetInterruptInServiceFlag |
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[158] | 113 | |
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| 114 | ; Clear Task Flag and set Interrupt In-Service Flag |
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| 115 | or BYTE [di+DPT.bFlagsHigh], FLGH_DPT_INTERRUPT_IN_SERVICE |
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[152] | 116 | push ds |
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[158] | 117 | LOAD_BDA_SEGMENT_TO ds, dx, ! ; Also zero DX |
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| 118 | mov [BDA.bHDTaskFlg], dl |
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[152] | 119 | pop ds |
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| 120 | .DoNotSetInterruptInServiceFlag: |
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[158] | 121 | mov dl, DEVICE_CONTROL_REGISTER_out |
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[160] | 122 | call IdeIO_OutputALtoIdeControlBlockRegisterInDL |
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[150] | 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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[160] | 127 | call IdeIO_OutputALtoIdeRegisterInDL |
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[150] | 128 | |
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| 129 | ; Output Sector Address High (only used by LBA48) |
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[218] | 130 | eMOVZX ax, BYTE [bp+IDEPACK.bLbaLowExt] |
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[150] | 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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[160] | 142 | call IdeIO_OutputALtoIdeRegisterInDL |
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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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| 147 | je SHORT IdeTransfer_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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| 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 | |
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| 156 | .DriveNotReady: |
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| 157 | pop bx ; Clean stack |
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| 158 | ReturnSinceTimeoutWhenPollingBusy: |
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| 159 | ret |
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| 160 | |
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| 161 | |
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| 162 | ;-------------------------------------------------------------------- |
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| 163 | ; IdeCommand_SelectDrive |
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| 164 | ; Parameters: |
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| 165 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 166 | ; SS:BP: Ptr to IDEPACK |
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| 167 | ; Returns: |
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| 168 | ; AH: INT 13h Error Code |
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| 169 | ; CF: Cleared if success, Set if error |
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| 170 | ; Corrupts registers: |
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| 171 | ; AL, BX, CX, DX |
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| 172 | ;-------------------------------------------------------------------- |
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| 173 | ALIGN JUMP_ALIGN |
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| 174 | IdeCommand_SelectDrive: |
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| 175 | ; Wait until neither Master or Slave Drive is busy |
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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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[158] | 178 | eCMOVE bh, TIMEOUT_IDENTIFY_DEVICE |
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[150] | 179 | call IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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| 180 | jc SHORT ReturnSinceTimeoutWhenPollingBusy |
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| 181 | |
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| 182 | ; Select Master or Slave Drive |
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| 183 | mov dl, DRIVE_AND_HEAD_SELECT_REGISTER |
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| 184 | mov al, [bp+IDEPACK.bDrvAndHead] |
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[160] | 185 | call IdeIO_OutputALtoIdeRegisterInDL |
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[150] | 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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[158] | 188 | eCMOVE bh, TIMEOUT_IDENTIFY_DEVICE |
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[150] | 189 | jmp IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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| 190 | |
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| 191 | |
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| 192 | ;-------------------------------------------------------------------- |
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| 193 | ; OutputSectorCountAndAddress |
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| 194 | ; Parameters: |
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| 195 | ; AH: LBA low bits (Sector Number) |
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| 196 | ; AL: Sector Count |
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| 197 | ; CL: LBA middle bits (Cylinder Number low) |
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| 198 | ; CH: LBA high bits (Cylinder Number high) |
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| 199 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 200 | ; Returns: |
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| 201 | ; Nothing |
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| 202 | ; Corrupts registers: |
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| 203 | ; AL, BX, DX |
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| 204 | ;-------------------------------------------------------------------- |
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| 205 | ALIGN JUMP_ALIGN |
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| 206 | OutputSectorCountAndAddress: |
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| 207 | mov dl, SECTOR_COUNT_REGISTER |
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[160] | 208 | call IdeIO_OutputALtoIdeRegisterInDL |
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[150] | 209 | |
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| 210 | mov al, ah |
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| 211 | mov dl, LBA_LOW_REGISTER |
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[160] | 212 | call IdeIO_OutputALtoIdeRegisterInDL |
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[150] | 213 | |
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| 214 | mov al, cl |
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| 215 | mov dl, LBA_MIDDLE_REGISTER |
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[160] | 216 | call IdeIO_OutputALtoIdeRegisterInDL |
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[150] | 217 | |
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| 218 | mov al, ch |
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| 219 | mov dl, LBA_HIGH_REGISTER |
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[160] | 220 | jmp IdeIO_OutputALtoIdeRegisterInDL |
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