[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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[376] | 4 | ; |
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[445] | 5 | ; XTIDE Universal BIOS and Associated Tools |
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[625] | 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2023 by XTIDE Universal BIOS Team. |
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[376] | 7 | ; |
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| 8 | ; This program is free software; you can redistribute it and/or modify |
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| 9 | ; it under the terms of the GNU General Public License as published by |
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| 10 | ; the Free Software Foundation; either version 2 of the License, or |
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| 11 | ; (at your option) any later version. |
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[445] | 12 | ; |
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[376] | 13 | ; This program is distributed in the hope that it will be useful, |
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| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | ; GNU General Public License for more details. |
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[445] | 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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| 18 | ; |
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[376] | 19 | |
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[150] | 20 | ; Section containing code |
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| 21 | SECTION .text |
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| 22 | |
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| 23 | ;-------------------------------------------------------------------- |
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[507] | 24 | ; IdeCommand_ResetMasterAndSlaveController |
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| 25 | ; Parameters: |
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| 26 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 27 | ; Returns: |
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| 28 | ; AH: INT 13h Error Code |
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| 29 | ; CF: Cleared if success, Set if error |
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| 30 | ; Corrupts registers: |
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| 31 | ; AL, BX, CX, DX |
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| 32 | ;-------------------------------------------------------------------- |
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[596] | 33 | IdeCommand_ResetMasterAndSlaveController: ; Unused entrypoint OK |
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[507] | 34 | ; HSR0: Set_SRST |
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[589] | 35 | ; Used to be: |
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| 36 | ; call AccessDPT_GetDeviceControlByteToAL |
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| 37 | ; or al, FLG_DEVCONTROL_SRST | FLG_DEVCONTROL_nIEN ; Set Reset bit |
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| 38 | ; Is now: |
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| 39 | mov al, FLG_DEVCONTROL_SRST | FLG_DEVCONTROL_nIEN |
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| 40 | ; --- |
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[507] | 41 | OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out |
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| 42 | mov ax, HSR0_RESET_WAIT_US |
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| 43 | call Timer_DelayMicrosecondsFromAX |
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| 44 | |
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| 45 | ; HSR1: Clear_wait |
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[589] | 46 | ; Used to be: |
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| 47 | ; call AccessDPT_GetDeviceControlByteToAL |
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| 48 | ; or al, FLG_DEVCONTROL_nIEN |
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| 49 | ; and al, ~FLG_DEVCONTROL_SRST ; Clear reset bit |
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| 50 | ; Is now: |
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| 51 | mov al, FLG_DEVCONTROL_nIEN |
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| 52 | ; --- |
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[507] | 53 | OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out |
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| 54 | mov ax, HSR1_RESET_WAIT_US |
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| 55 | call Timer_DelayMicrosecondsFromAX |
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| 56 | |
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| 57 | ; HSR2: Check_status |
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| 58 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_MAXIMUM, FLG_STATUS_BSY) |
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| 59 | jmp IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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| 60 | |
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[589] | 61 | ; *FIXME* AccessDPT_GetDeviceControlByteToAL currently always returns with |
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| 62 | ; AL cleared (0) or with only bit 1 set (FLG_DEVCONTROL_nIEN = 2). |
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| 63 | ; The commented away instructions above sets FLG_DEVCONTROL_nIEN anyway |
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| 64 | ; making the call to AccessDPT_GetDeviceControlByteToAL redundant. |
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| 65 | ; I have left this code as is since I don't know if it's a mistake |
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| 66 | ; (from all the way back to r150) or if it's coded this way in anticipation |
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| 67 | ; of some future changes to AccessDPT_GetDeviceControlByteToAL. |
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[507] | 68 | |
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| 69 | ;-------------------------------------------------------------------- |
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[150] | 70 | ; IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH |
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| 71 | ; Parameters: |
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| 72 | ; BH: Drive Select byte for Drive and Head Select Register |
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[473] | 73 | ; DX: Autodetected port for XT-CF |
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[150] | 74 | ; DS: Segment to RAMVARS |
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| 75 | ; ES:SI: Ptr to buffer to receive 512-byte IDE Information |
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| 76 | ; CS:BP: Ptr to IDEVARS |
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| 77 | ; Returns: |
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| 78 | ; AH: INT 13h Error Code |
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| 79 | ; CF: Cleared if success, Set if error |
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| 80 | ; Corrupts registers: |
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[443] | 81 | ; AL, BX, CX, DX, SI, DI, ES |
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[150] | 82 | ;-------------------------------------------------------------------- |
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[596] | 83 | IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH: ; Unused entrypoint OK |
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[150] | 84 | ; Create fake DPT to be able to use Device.asm functions |
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| 85 | call FindDPT_ForNewDriveToDSDI |
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[158] | 86 | eMOVZX ax, bh |
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[150] | 87 | mov [di+DPT.wFlags], ax |
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[473] | 88 | call CreateDPT_StoreIdevarsOffsetAndBasePortFromCSBPtoDPTinDSDI |
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| 89 | call IdeDPT_StoreDeviceTypeToDPTinDSDIfromIdevarsInCSBP |
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[365] | 90 | mov BYTE [di+DPT_ATA.bBlockSize], 1 ; Block = 1 sector |
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[150] | 91 | |
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[443] | 92 | ; Wait until drive motors have reached full speed |
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[473] | 93 | cmp bp, BYTE ROMVARS.ideVars0 ; First controller? |
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[150] | 94 | jne SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster |
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[473] | 95 | test bh, FLG_DRVNHEAD_DRV ; Wait already done for Master |
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[150] | 96 | jnz SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster |
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[545] | 97 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_MOTOR_STARTUP, FLG_STATUS_BSY) |
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[507] | 98 | call IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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[150] | 99 | .SkipLongWaitSinceDriveIsNotPrimaryMaster: |
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| 100 | |
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| 101 | ; Create IDEPACK without INTPACK |
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| 102 | push bp |
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| 103 | call Idepack_FakeToSSBP |
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| 104 | |
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[545] | 105 | %ifdef MODULE_8BIT_IDE |
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[480] | 106 | push si |
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[584] | 107 | |
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| 108 | ; Enable 8-bit PIO for DEVICE_8BIT_ATA (no need to verify device type here) |
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[480] | 109 | call AH9h_Enable8bitModeForDevice8bitAta |
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[584] | 110 | |
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| 111 | ; Set XT-CF mode. No need to check here if device is XT-CF or not. |
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[545] | 112 | %ifdef MODULE_8BIT_IDE_ADVANCED |
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[584] | 113 | call AH1Eh_GetCurrentXTCFmodeToAX ; Reads from DPT_ATA.bDevice that we just stored |
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| 114 | call AH9h_SetModeFromALtoXTCF ; Enables/disables 8-bit mode when necessary |
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[545] | 115 | %endif ; MODULE_8BIT_IDE_ADVANCED |
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[443] | 116 | pop si |
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[545] | 117 | %endif ; MODULE_8BIT_IDE |
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[437] | 118 | |
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[150] | 119 | ; Prepare to output Identify Device command |
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| 120 | mov dl, 1 ; Sector count (required by IdeTransfer.asm) |
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| 121 | mov al, COMMAND_IDENTIFY_DEVICE |
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[411] | 122 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ) |
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[150] | 123 | call Idepack_StoreNonExtParametersAndIssueCommandFromAL |
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| 124 | |
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| 125 | ; Clean stack and return |
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[443] | 126 | lea sp, [bp+SIZE_OF_IDEPACK_WITHOUT_INTPACK] ; This assumes BP hasn't changed between Idepack_FakeToSSBP and here |
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[150] | 127 | pop bp |
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| 128 | ret |
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| 129 | |
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| 130 | |
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| 131 | ;-------------------------------------------------------------------- |
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| 132 | ; IdeCommand_OutputWithParameters |
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| 133 | ; Parameters: |
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| 134 | ; BH: System timer ticks for timeout |
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| 135 | ; BL: IDE Status Register bit to poll after command |
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| 136 | ; ES:SI: Ptr to buffer (for data transfer commands) |
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| 137 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 138 | ; SS:BP: Ptr to IDEPACK |
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| 139 | ; Returns: |
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| 140 | ; AH: INT 13h Error Code |
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[249] | 141 | ; CX: Number of successfully transferred sectors (for transfer commands) |
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[150] | 142 | ; CF: Cleared if success, Set if error |
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| 143 | ; Corrupts registers: |
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[249] | 144 | ; AL, BX, (CX), DX, (ES:SI for data transfer commands) |
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[150] | 145 | ;-------------------------------------------------------------------- |
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| 146 | ALIGN JUMP_ALIGN |
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[596] | 147 | IdeCommand_OutputWithParameters: ; Unused entrypoint OK |
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[158] | 148 | push bx ; Store status register bits to poll |
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[150] | 149 | |
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| 150 | ; Select Master or Slave drive and output head number or LBA28 top bits |
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[400] | 151 | call IdeCommand_SelectDrive |
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[150] | 152 | jc SHORT .DriveNotReady |
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| 153 | |
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| 154 | ; Output Device Control Byte to enable or disable interrupts |
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| 155 | mov al, [bp+IDEPACK.bDeviceControl] |
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[400] | 156 | %ifdef MODULE_IRQ |
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[158] | 157 | test al, FLG_DEVCONTROL_nIEN ; Interrupts disabled? |
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[152] | 158 | jnz SHORT .DoNotSetInterruptInServiceFlag |
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[158] | 159 | |
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| 160 | ; Clear Task Flag and set Interrupt In-Service Flag |
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[152] | 161 | push ds |
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[540] | 162 | LOAD_BDA_SEGMENT_TO ds, dx |
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| 163 | mov BYTE [BDA.bHDTaskFlg], 1 ; Will be adjusted to zero later |
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[152] | 164 | pop ds |
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| 165 | .DoNotSetInterruptInServiceFlag: |
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[266] | 166 | %endif |
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[267] | 167 | OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out |
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[150] | 168 | |
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| 169 | ; Output Feature Number |
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| 170 | mov al, [bp+IDEPACK.bFeatures] |
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[267] | 171 | OUTPUT_AL_TO_IDE_REGISTER FEATURES_REGISTER_out |
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[150] | 172 | |
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| 173 | ; Output Sector Address High (only used by LBA48) |
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[285] | 174 | %ifdef MODULE_EBIOS |
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[612] | 175 | mov ah, [bp+IDEPACK.bLbaLowExt] |
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| 176 | xor al, al ; Zero sector count |
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[150] | 177 | mov cx, [bp+IDEPACK.wLbaMiddleAndHighExt] |
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[400] | 178 | call OutputSectorCountAndAddress |
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[285] | 179 | %endif |
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[150] | 180 | |
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| 181 | ; Output Sector Address Low |
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| 182 | mov ax, [bp+IDEPACK.wSectorCountAndLbaLow] |
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| 183 | mov cx, [bp+IDEPACK.wLbaMiddleAndHigh] |
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[400] | 184 | call OutputSectorCountAndAddress |
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[150] | 185 | |
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| 186 | ; Output command |
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| 187 | mov al, [bp+IDEPACK.bCommand] |
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[267] | 188 | OUTPUT_AL_TO_IDE_REGISTER COMMAND_REGISTER_out |
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[150] | 189 | |
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| 190 | ; Wait until command completed |
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[400] | 191 | pop bx ; Pop status and timeout for polling |
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| 192 | cmp bl, FLG_STATUS_DRQ ; Data transfer started? |
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| 193 | jne SHORT .WaitUntilNonTransferCommandCompletes |
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[493] | 194 | %ifdef MODULE_8BIT_IDE_ADVANCED |
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[545] | 195 | cmp BYTE [di+DPT_ATA.bDevice], DEVICE_8BIT_JRIDE_ISA |
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| 196 | jae SHORT JrIdeTransfer_StartWithCommandInAL ; DEVICE_8BIT_JRIDE_ISA or DEVICE_8BIT_ADP50L |
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[480] | 197 | %endif |
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[474] | 198 | jmp IdeTransfer_StartWithCommandInAL |
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[400] | 199 | |
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| 200 | .WaitUntilNonTransferCommandCompletes: |
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| 201 | %ifdef MODULE_IRQ |
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[150] | 202 | test BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN |
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[592] | 203 | %ifdef USE_386 |
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| 204 | jnz IdeWait_IRQorStatusFlagInBLwithTimeoutInBH |
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| 205 | %else |
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[400] | 206 | jz SHORT .PollStatusFlagInsteadOfWaitIrq |
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| 207 | jmp IdeWait_IRQorStatusFlagInBLwithTimeoutInBH |
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| 208 | .PollStatusFlagInsteadOfWaitIrq: |
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| 209 | %endif |
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[592] | 210 | %endif ; MODULE_IRQ |
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[400] | 211 | jmp IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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[150] | 212 | |
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| 213 | .DriveNotReady: |
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| 214 | pop bx ; Clean stack |
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| 215 | ret |
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| 216 | |
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| 217 | |
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| 218 | ;-------------------------------------------------------------------- |
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| 219 | ; IdeCommand_SelectDrive |
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| 220 | ; Parameters: |
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| 221 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 222 | ; SS:BP: Ptr to IDEPACK |
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| 223 | ; Returns: |
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| 224 | ; AH: INT 13h Error Code |
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| 225 | ; CF: Cleared if success, Set if error |
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| 226 | ; Corrupts registers: |
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| 227 | ; AL, BX, CX, DX |
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| 228 | ;-------------------------------------------------------------------- |
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| 229 | ALIGN JUMP_ALIGN |
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[400] | 230 | IdeCommand_SelectDrive: |
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[444] | 231 | ; We use different timeout value when detecting drives. |
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| 232 | ; This prevents unnecessary long delays when drive is not present. |
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[473] | 233 | mov cx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY) |
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[444] | 234 | cmp WORD [RAMVARS.wDrvDetectSignature], RAMVARS_DRV_DETECT_SIGNATURE |
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[473] | 235 | eCMOVE ch, TIMEOUT_SELECT_DRIVE_DURING_DRIVE_DETECTION |
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[408] | 236 | |
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[150] | 237 | ; Select Master or Slave Drive |
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| 238 | mov al, [bp+IDEPACK.bDrvAndHead] |
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[267] | 239 | OUTPUT_AL_TO_IDE_REGISTER DRIVE_AND_HEAD_SELECT_REGISTER |
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[473] | 240 | mov bx, cx |
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[400] | 241 | call IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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[150] | 242 | |
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[610] | 243 | ; Output again to make sure head bits are set. They were lost if the device |
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| 244 | ; was busy when we first output drive select (although it shouldn't be busy |
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| 245 | ; since we have waited error result after previous command). Some low power |
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| 246 | ; drives (CF cards, 1.8" HDDs etc) have some internal sleep modes that |
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| 247 | ; might cause trouble? Normal HDDs seem to work fine. |
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[611] | 248 | ; |
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| 249 | ; Now commented away since this fix was not necessary. Let's keep it here |
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| 250 | ; if some drive someday has problems crossing 8GB |
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| 251 | ;mov al, [bp+IDEPACK.bDrvAndHead] |
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| 252 | ;OUTPUT_AL_TO_IDE_REGISTER DRIVE_AND_HEAD_SELECT_REGISTER |
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[610] | 253 | |
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[281] | 254 | ; Ignore errors from IDE Error Register (set by previous command) |
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[285] | 255 | cmp ah, RET_HD_TIMEOUT |
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| 256 | je SHORT .FailedToSelectDrive |
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| 257 | xor ax, ax ; Always success unless timeout |
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| 258 | ret |
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| 259 | .FailedToSelectDrive: |
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[281] | 260 | stc |
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[279] | 261 | ret |
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[150] | 262 | |
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[279] | 263 | |
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[150] | 264 | ;-------------------------------------------------------------------- |
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| 265 | ; OutputSectorCountAndAddress |
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| 266 | ; Parameters: |
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| 267 | ; AH: LBA low bits (Sector Number) |
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| 268 | ; AL: Sector Count |
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| 269 | ; CL: LBA middle bits (Cylinder Number low) |
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| 270 | ; CH: LBA high bits (Cylinder Number high) |
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| 271 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 272 | ; Returns: |
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| 273 | ; Nothing |
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| 274 | ; Corrupts registers: |
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| 275 | ; AL, BX, DX |
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| 276 | ;-------------------------------------------------------------------- |
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| 277 | ALIGN JUMP_ALIGN |
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[400] | 278 | OutputSectorCountAndAddress: |
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[267] | 279 | OUTPUT_AL_TO_IDE_REGISTER SECTOR_COUNT_REGISTER |
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[150] | 280 | |
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| 281 | mov al, ah |
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[267] | 282 | OUTPUT_AL_TO_IDE_REGISTER LBA_LOW_REGISTER |
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[150] | 283 | |
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| 284 | mov al, cl |
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[267] | 285 | OUTPUT_AL_TO_IDE_REGISTER LBA_MIDDLE_REGISTER |
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[150] | 286 | |
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| 287 | mov al, ch |
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[473] | 288 | OUTPUT_AL_TO_IDE_REGISTER LBA_HIGH_REGISTER |
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| 289 | ret |
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[617] | 290 | |
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| 291 | |
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| 292 | ;-------------------------------------------------------------------- |
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| 293 | ; IdeCommand_ReadLBAlowRegisterToAL |
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| 294 | ; Returns LBA low register / Sector number register contents. |
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| 295 | ; Note that this returns valid value only after transfer command (read/write/verify) |
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| 296 | ; has stopped to an error. Do not call this otherwise. |
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| 297 | ; Parameters: |
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| 298 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 299 | ; Returns: |
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| 300 | ; AL: Byte read from the register |
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| 301 | ; Corrupts registers: |
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| 302 | ; BX, DX |
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| 303 | ;-------------------------------------------------------------------- |
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| 304 | ALIGN JUMP_ALIGN |
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[625] | 305 | IdeCommand_ReadLBAlowRegisterToAL: ; Unused entrypoint OK |
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[617] | 306 | ; HOB bit (defined in 48-bit address feature set) should be zero by default |
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| 307 | ; so we get the correct value for CHS, LBA28 and LBA48 drives and commands |
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| 308 | INPUT_TO_AL_FROM_IDE_REGISTER LBA_LOW_REGISTER |
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| 309 | ret |
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