source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeCommand.asm@ 437

Last change on this file since 437 was 437, checked in by aitotat@…, 12 years ago

Changes to XTIDE Universal BIOS:

  • Changed Fast XTIDE to Lo-tech XT-CF
  • 8-bit PIO Transfer mode is enabled for Lo-tech XT-CF
File size: 8.3 KB
Line 
1; Project name : XTIDE Universal BIOS
2; Description : IDE Device Command functions.
3
4;
5; XTIDE Universal BIOS and Associated Tools
6; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
7;
8; This program is free software; you can redistribute it and/or modify
9; it under the terms of the GNU General Public License as published by
10; the Free Software Foundation; either version 2 of the License, or
11; (at your option) any later version.
12;
13; This program is distributed in the hope that it will be useful,
14; but WITHOUT ANY WARRANTY; without even the implied warranty of
15; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16; GNU General Public License for more details.
17; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
18;
19
20; Section containing code
21SECTION .text
22
23;--------------------------------------------------------------------
24; IdeCommand_ResetMasterAndSlaveController
25; Parameters:
26; DS:DI: Ptr to DPT (in RAMVARS segment)
27; Returns:
28; AH: INT 13h Error Code
29; CF: Cleared if success, Set if error
30; Corrupts registers:
31; AL, BX, CX, DX
32;--------------------------------------------------------------------
33IdeCommand_ResetMasterAndSlaveController:
34 ; HSR0: Set_SRST
35 call AccessDPT_GetDeviceControlByteToAL
36 or al, FLG_DEVCONTROL_SRST | FLG_DEVCONTROL_nIEN ; Set Reset bit
37 OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out
38 mov ax, HSR0_RESET_WAIT_US
39 call Timer_DelayMicrosecondsFromAX
40
41 ; HSR1: Clear_wait
42 call AccessDPT_GetDeviceControlByteToAL
43 or al, FLG_DEVCONTROL_nIEN
44 and al, ~FLG_DEVCONTROL_SRST ; Clear reset bit
45 OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out
46 mov ax, HSR1_RESET_WAIT_US
47 call Timer_DelayMicrosecondsFromAX
48
49 ; HSR2: Check_status
50 mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_MAXIMUM, FLG_STATUS_BSY)
51 jmp IdeWait_PollStatusFlagInBLwithTimeoutInBH
52
53
54;--------------------------------------------------------------------
55; IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
56; Parameters:
57; BH: Drive Select byte for Drive and Head Select Register
58; DS: Segment to RAMVARS
59; ES:SI: Ptr to buffer to receive 512-byte IDE Information
60; CS:BP: Ptr to IDEVARS
61; Returns:
62; AH: INT 13h Error Code
63; CF: Cleared if success, Set if error
64; Corrupts registers:
65; AL, BL, CX, DX, SI, DI, ES
66;--------------------------------------------------------------------
67IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH:
68 ; Create fake DPT to be able to use Device.asm functions
69 call FindDPT_ForNewDriveToDSDI
70 eMOVZX ax, bh
71 mov [di+DPT.wFlags], ax
72 mov [di+DPT.bIdevarsOffset], bp
73 mov BYTE [di+DPT_ATA.bBlockSize], 1 ; Block = 1 sector
74 call IdeDPT_StoreDeviceTypeFromIdevarsInCSBPtoDPTinDSDI
75
76 ; Wait until drive motors have reached max speed
77 cmp bp, BYTE ROMVARS.ideVars0
78 jne SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster
79 test bh, FLG_DRVNHEAD_DRV
80 jnz SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster
81 call AHDh_WaitUnilDriveMotorHasReachedFullSpeed
82.SkipLongWaitSinceDriveIsNotPrimaryMaster:
83
84 ; Create IDEPACK without INTPACK
85 push bp
86 call Idepack_FakeToSSBP
87
88 ; Enable 8-bit PIO mode for Lo-tech XT-CF
89 call AH9h_Enable8bitPioModeForXTCF
90
91 ; Prepare to output Identify Device command
92 mov dl, 1 ; Sector count (required by IdeTransfer.asm)
93 mov al, COMMAND_IDENTIFY_DEVICE
94 mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ)
95 call Idepack_StoreNonExtParametersAndIssueCommandFromAL
96
97 ; Clean stack and return
98 lea sp, [bp+EXTRA_BYTES_FOR_INTPACK] ; This assumes BP hasn't changed between Idepack_FakeToSSBP and here
99 pop bp
100 ret
101
102
103;--------------------------------------------------------------------
104; IdeCommand_OutputWithParameters
105; Parameters:
106; BH: System timer ticks for timeout
107; BL: IDE Status Register bit to poll after command
108; ES:SI: Ptr to buffer (for data transfer commands)
109; DS:DI: Ptr to DPT (in RAMVARS segment)
110; SS:BP: Ptr to IDEPACK
111; Returns:
112; AH: INT 13h Error Code
113; CX: Number of successfully transferred sectors (for transfer commands)
114; CF: Cleared if success, Set if error
115; Corrupts registers:
116; AL, BX, (CX), DX, (ES:SI for data transfer commands)
117;--------------------------------------------------------------------
118ALIGN JUMP_ALIGN
119IdeCommand_OutputWithParameters:
120 push bx ; Store status register bits to poll
121
122 ; Select Master or Slave drive and output head number or LBA28 top bits
123 call IdeCommand_SelectDrive
124 jc SHORT .DriveNotReady
125
126 ; Output Device Control Byte to enable or disable interrupts
127 mov al, [bp+IDEPACK.bDeviceControl]
128%ifdef MODULE_IRQ
129 test al, FLG_DEVCONTROL_nIEN ; Interrupts disabled?
130 jnz SHORT .DoNotSetInterruptInServiceFlag
131
132 ; Clear Task Flag and set Interrupt In-Service Flag
133 or BYTE [di+DPT.bFlagsHigh], FLGH_DPT_INTERRUPT_IN_SERVICE
134 push ds
135 LOAD_BDA_SEGMENT_TO ds, dx, ! ; Also zero DX
136 mov [BDA.bHDTaskFlg], dl
137 pop ds
138.DoNotSetInterruptInServiceFlag:
139%endif
140 OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out
141
142 ; Output Feature Number
143 mov al, [bp+IDEPACK.bFeatures]
144 OUTPUT_AL_TO_IDE_REGISTER FEATURES_REGISTER_out
145
146 ; Output Sector Address High (only used by LBA48)
147%ifdef MODULE_EBIOS
148 eMOVZX ax, [bp+IDEPACK.bLbaLowExt] ; Zero sector count
149 mov cx, [bp+IDEPACK.wLbaMiddleAndHighExt]
150 call OutputSectorCountAndAddress
151%endif
152
153 ; Output Sector Address Low
154 mov ax, [bp+IDEPACK.wSectorCountAndLbaLow]
155 mov cx, [bp+IDEPACK.wLbaMiddleAndHigh]
156 call OutputSectorCountAndAddress
157
158 ; Output command
159 mov al, [bp+IDEPACK.bCommand]
160 OUTPUT_AL_TO_IDE_REGISTER COMMAND_REGISTER_out
161
162 ; Wait until command completed
163 pop bx ; Pop status and timeout for polling
164 cmp bl, FLG_STATUS_DRQ ; Data transfer started?
165 jne SHORT .WaitUntilNonTransferCommandCompletes
166%ifdef MODULE_JRIDE
167 cmp BYTE [di+DPT_ATA.bDevice], DEVICE_8BIT_JRIDE_ISA
168 je SHORT JrIdeTransfer_StartWithCommandInAL
169%endif
170 jmp IdeTransfer_StartWithCommandInAL
171
172.WaitUntilNonTransferCommandCompletes:
173%ifdef MODULE_IRQ
174 test BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN
175 jz SHORT .PollStatusFlagInsteadOfWaitIrq
176 jmp IdeWait_IRQorStatusFlagInBLwithTimeoutInBH
177.PollStatusFlagInsteadOfWaitIrq:
178%endif
179 jmp IdeWait_PollStatusFlagInBLwithTimeoutInBH
180
181.DriveNotReady:
182 pop bx ; Clean stack
183 ret
184
185
186;--------------------------------------------------------------------
187; IdeCommand_SelectDrive
188; Parameters:
189; DS:DI: Ptr to DPT (in RAMVARS segment)
190; SS:BP: Ptr to IDEPACK
191; Returns:
192; AH: INT 13h Error Code
193; CF: Cleared if success, Set if error
194; Corrupts registers:
195; AL, BX, CX, DX
196;--------------------------------------------------------------------
197ALIGN JUMP_ALIGN
198IdeCommand_SelectDrive:
199%if 0
200 ; Wait until neither Master or Slave Drive is busy
201 mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_BSY, FLG_STATUS_BSY)
202 cmp BYTE [bp+IDEPACK.bCommand], COMMAND_IDENTIFY_DEVICE
203 eCMOVE bh, TIMEOUT_IDENTIFY_DEVICE
204 call IdeWait_PollStatusFlagInBLwithTimeoutInBH
205%endif
206
207 ; Select Master or Slave Drive
208 mov al, [bp+IDEPACK.bDrvAndHead]
209 OUTPUT_AL_TO_IDE_REGISTER DRIVE_AND_HEAD_SELECT_REGISTER
210 mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY)
211 cmp BYTE [bp+IDEPACK.bCommand], COMMAND_IDENTIFY_DEVICE
212 eCMOVE bh, TIMEOUT_IDENTIFY_DEVICE
213 call IdeWait_PollStatusFlagInBLwithTimeoutInBH
214
215 ; Ignore errors from IDE Error Register (set by previous command)
216 cmp ah, RET_HD_TIMEOUT
217 je SHORT .FailedToSelectDrive
218 xor ax, ax ; Always success unless timeout
219 ret
220.FailedToSelectDrive:
221 stc
222 ret
223
224
225;--------------------------------------------------------------------
226; OutputSectorCountAndAddress
227; Parameters:
228; AH: LBA low bits (Sector Number)
229; AL: Sector Count
230; CL: LBA middle bits (Cylinder Number low)
231; CH: LBA high bits (Cylinder Number high)
232; DS:DI: Ptr to DPT (in RAMVARS segment)
233; Returns:
234; Nothing
235; Corrupts registers:
236; AL, BX, DX
237;--------------------------------------------------------------------
238ALIGN JUMP_ALIGN
239OutputSectorCountAndAddress:
240 OUTPUT_AL_TO_IDE_REGISTER SECTOR_COUNT_REGISTER
241
242 mov al, ah
243 OUTPUT_AL_TO_IDE_REGISTER LBA_LOW_REGISTER
244
245 mov al, cl
246 OUTPUT_AL_TO_IDE_REGISTER LBA_MIDDLE_REGISTER
247
248 mov al, ch
249 JUMP_TO_OUTPUT_AL_TO_IDE_REGISTER LBA_HIGH_REGISTER
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