[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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[238] | 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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[238] | 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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[160] | 58 | call IdeDPT_StoreReversedAddressLinesFlagIfNecessary |
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[150] | 59 | |
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| 60 | ; Wait until drive motors have reached max speed |
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| 61 | cmp bp, BYTE ROMVARS.ideVars0 |
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| 62 | jne SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster |
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[158] | 63 | test al, FLG_DRVNHEAD_DRV |
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[150] | 64 | jnz SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster |
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| 65 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_MOTOR_STARTUP, FLG_STATUS_BSY) |
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[238] | 66 | call IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH |
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[150] | 67 | .SkipLongWaitSinceDriveIsNotPrimaryMaster: |
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| 68 | |
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| 69 | ; Create IDEPACK without INTPACK |
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| 70 | push bp |
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| 71 | call Idepack_FakeToSSBP |
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| 72 | |
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| 73 | ; Prepare to output Identify Device command |
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| 74 | mov dl, 1 ; Sector count (required by IdeTransfer.asm) |
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| 75 | mov al, COMMAND_IDENTIFY_DEVICE |
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| 76 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_IDENTIFY_DEVICE, FLG_STATUS_DRQ) |
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| 77 | call Idepack_StoreNonExtParametersAndIssueCommandFromAL |
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| 78 | |
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| 79 | ; Clean stack and return |
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[158] | 80 | lea sp, [bp+EXTRA_BYTES_FOR_INTPACK] ; This assumes BP hasn't changed between Idepack_FakeToSSBP and here |
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[150] | 81 | pop bp |
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| 82 | ret |
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| 83 | |
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| 84 | |
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| 85 | ;-------------------------------------------------------------------- |
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| 86 | ; IdeCommand_OutputWithParameters |
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| 87 | ; Parameters: |
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| 88 | ; BH: System timer ticks for timeout |
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| 89 | ; BL: IDE Status Register bit to poll after command |
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| 90 | ; ES:SI: Ptr to buffer (for data transfer commands) |
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| 91 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 92 | ; SS:BP: Ptr to IDEPACK |
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| 93 | ; Returns: |
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| 94 | ; AH: INT 13h Error Code |
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| 95 | ; CF: Cleared if success, Set if error |
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| 96 | ; Corrupts registers: |
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| 97 | ; AL, BX, CX, DX, (ES:SI for data transfer commands) |
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| 98 | ;-------------------------------------------------------------------- |
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| 99 | ALIGN JUMP_ALIGN |
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[238] | 100 | IDEDEVICE%+Command_OutputWithParameters: |
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[158] | 101 | push bx ; Store status register bits to poll |
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[150] | 102 | |
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| 103 | ; Select Master or Slave drive and output head number or LBA28 top bits |
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[238] | 104 | call IDEDEVICE%+Command_SelectDrive |
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[150] | 105 | jc SHORT .DriveNotReady |
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| 106 | |
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| 107 | ; Output Device Control Byte to enable or disable interrupts |
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| 108 | mov al, [bp+IDEPACK.bDeviceControl] |
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[158] | 109 | test al, FLG_DEVCONTROL_nIEN ; Interrupts disabled? |
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[152] | 110 | jnz SHORT .DoNotSetInterruptInServiceFlag |
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[158] | 111 | |
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| 112 | ; Clear Task Flag and set Interrupt In-Service Flag |
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| 113 | or BYTE [di+DPT.bFlagsHigh], FLGH_DPT_INTERRUPT_IN_SERVICE |
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[152] | 114 | push ds |
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[158] | 115 | LOAD_BDA_SEGMENT_TO ds, dx, ! ; Also zero DX |
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| 116 | mov [BDA.bHDTaskFlg], dl |
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[152] | 117 | pop ds |
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| 118 | .DoNotSetInterruptInServiceFlag: |
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[238] | 119 | OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out |
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[150] | 120 | |
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| 121 | ; Output Feature Number |
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| 122 | mov al, [bp+IDEPACK.bFeatures] |
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[238] | 123 | OUTPUT_AL_TO_IDE_REGISTER FEATURES_REGISTER_out |
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[150] | 124 | |
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| 125 | ; Output Sector Address High (only used by LBA48) |
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[218] | 126 | eMOVZX ax, BYTE [bp+IDEPACK.bLbaLowExt] |
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[150] | 127 | mov cx, [bp+IDEPACK.wLbaMiddleAndHighExt] |
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| 128 | call OutputSectorCountAndAddress |
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| 129 | |
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| 130 | ; Output Sector Address Low |
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| 131 | mov ax, [bp+IDEPACK.wSectorCountAndLbaLow] |
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| 132 | mov cx, [bp+IDEPACK.wLbaMiddleAndHigh] |
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| 133 | call OutputSectorCountAndAddress |
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| 134 | |
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| 135 | ; Output command |
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| 136 | mov al, [bp+IDEPACK.bCommand] |
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[238] | 137 | OUTPUT_AL_TO_IDE_REGISTER COMMAND_REGISTER_out |
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[150] | 138 | |
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| 139 | ; Wait until command completed |
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[158] | 140 | pop bx ; Pop status and timeout for polling |
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| 141 | cmp bl, FLG_STATUS_DRQ ; Data transfer started? |
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[238] | 142 | je SHORT IDEDEVICE%+Transfer_StartWithCommandInAL |
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[150] | 143 | test BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN |
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| 144 | jz SHORT .WaitForIrqOrRdy |
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[238] | 145 | jmp IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH |
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[150] | 146 | |
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| 147 | ALIGN JUMP_ALIGN |
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| 148 | .WaitForIrqOrRdy: |
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[238] | 149 | jmp IDEDEVICE%+Wait_IRQorStatusFlagInBLwithTimeoutInBH |
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[150] | 150 | |
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| 151 | .DriveNotReady: |
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| 152 | pop bx ; Clean stack |
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[238] | 153 | IDEDEVICE%+ReturnSinceTimeoutWhenPollingBusy: |
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[150] | 154 | ret |
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| 155 | |
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| 156 | |
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| 157 | ;-------------------------------------------------------------------- |
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| 158 | ; IdeCommand_SelectDrive |
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| 159 | ; Parameters: |
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| 160 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 161 | ; SS:BP: Ptr to IDEPACK |
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| 162 | ; Returns: |
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| 163 | ; AH: INT 13h Error Code |
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| 164 | ; CF: Cleared if success, Set if error |
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| 165 | ; Corrupts registers: |
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| 166 | ; AL, BX, CX, DX |
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| 167 | ;-------------------------------------------------------------------- |
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| 168 | ALIGN JUMP_ALIGN |
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[238] | 169 | IDEDEVICE%+Command_SelectDrive: |
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[150] | 170 | ; Wait until neither Master or Slave Drive is busy |
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| 171 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_BSY, FLG_STATUS_BSY) |
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| 172 | cmp BYTE [bp+IDEPACK.bCommand], COMMAND_IDENTIFY_DEVICE |
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[158] | 173 | eCMOVE bh, TIMEOUT_IDENTIFY_DEVICE |
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[238] | 174 | call IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH |
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| 175 | jc SHORT IDEDEVICE%+ReturnSinceTimeoutWhenPollingBusy |
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[150] | 176 | |
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| 177 | ; Select Master or Slave Drive |
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| 178 | mov al, [bp+IDEPACK.bDrvAndHead] |
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[238] | 179 | OUTPUT_AL_TO_IDE_REGISTER DRIVE_AND_HEAD_SELECT_REGISTER |
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[150] | 180 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY) |
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| 181 | cmp BYTE [bp+IDEPACK.bCommand], COMMAND_IDENTIFY_DEVICE |
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[158] | 182 | eCMOVE bh, TIMEOUT_IDENTIFY_DEVICE |
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[238] | 183 | jmp IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH |
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[150] | 184 | |
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| 185 | |
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| 186 | ;-------------------------------------------------------------------- |
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| 187 | ; OutputSectorCountAndAddress |
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| 188 | ; Parameters: |
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| 189 | ; AH: LBA low bits (Sector Number) |
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| 190 | ; AL: Sector Count |
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| 191 | ; CL: LBA middle bits (Cylinder Number low) |
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| 192 | ; CH: LBA high bits (Cylinder Number high) |
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| 193 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 194 | ; Returns: |
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| 195 | ; Nothing |
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| 196 | ; Corrupts registers: |
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| 197 | ; AL, BX, DX |
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| 198 | ;-------------------------------------------------------------------- |
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[238] | 199 | %ifdef ASSEMBLE_SHARED_IDE_DEVICE_FUNCTIONS |
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[150] | 200 | ALIGN JUMP_ALIGN |
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| 201 | OutputSectorCountAndAddress: |
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[238] | 202 | OUTPUT_AL_TO_IDE_REGISTER SECTOR_COUNT_REGISTER |
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[150] | 203 | |
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| 204 | mov al, ah |
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[238] | 205 | OUTPUT_AL_TO_IDE_REGISTER LBA_LOW_REGISTER |
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[150] | 206 | |
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| 207 | mov al, cl |
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[238] | 208 | OUTPUT_AL_TO_IDE_REGISTER LBA_MIDDLE_REGISTER |
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[150] | 209 | |
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| 210 | mov al, ch |
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[238] | 211 | JUMP_TO_OUTPUT_AL_TO_IDE_REGISTER LBA_HIGH_REGISTER |
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| 212 | %endif |
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