source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeCommand.asm@ 611

Last change on this file since 611 was 611, checked in by Tomi Tilli, 3 years ago

Now actually fixed the problem some drives had when crossing 8GB. The problem only occurred with LBA48 commands. Sector count high was outputted to LBA(31:24) and vice versa.
File size: 10.2 KB
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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, 2011-2013 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: ; Unused entrypoint OK
34 ; HSR0: Set_SRST
35; Used to be:
36; call AccessDPT_GetDeviceControlByteToAL
37; or al, FLG_DEVCONTROL_SRST | FLG_DEVCONTROL_nIEN ; Set Reset bit
38; Is now:
39 mov al, FLG_DEVCONTROL_SRST | FLG_DEVCONTROL_nIEN
40; ---
41 OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out
42 mov ax, HSR0_RESET_WAIT_US
43 call Timer_DelayMicrosecondsFromAX
44
45 ; HSR1: Clear_wait
46; Used to be:
47; call AccessDPT_GetDeviceControlByteToAL
48; or al, FLG_DEVCONTROL_nIEN
49; and al, ~FLG_DEVCONTROL_SRST ; Clear reset bit
50; Is now:
51 mov al, FLG_DEVCONTROL_nIEN
52; ---
53 OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out
54 mov ax, HSR1_RESET_WAIT_US
55 call Timer_DelayMicrosecondsFromAX
56
57 ; HSR2: Check_status
58 mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_MAXIMUM, FLG_STATUS_BSY)
59 jmp IdeWait_PollStatusFlagInBLwithTimeoutInBH
60
61; *FIXME* AccessDPT_GetDeviceControlByteToAL currently always returns with
62; AL cleared (0) or with only bit 1 set (FLG_DEVCONTROL_nIEN = 2).
63; The commented away instructions above sets FLG_DEVCONTROL_nIEN anyway
64; making the call to AccessDPT_GetDeviceControlByteToAL redundant.
65; I have left this code as is since I don't know if it's a mistake
66; (from all the way back to r150) or if it's coded this way in anticipation
67; of some future changes to AccessDPT_GetDeviceControlByteToAL.
68
69;--------------------------------------------------------------------
70; IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
71; Parameters:
72; BH: Drive Select byte for Drive and Head Select Register
73; DX: Autodetected port for XT-CF
74; DS: Segment to RAMVARS
75; ES:SI: Ptr to buffer to receive 512-byte IDE Information
76; CS:BP: Ptr to IDEVARS
77; Returns:
78; AH: INT 13h Error Code
79; CF: Cleared if success, Set if error
80; Corrupts registers:
81; AL, BX, CX, DX, SI, DI, ES
82;--------------------------------------------------------------------
83IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH: ; Unused entrypoint OK
84 ; Create fake DPT to be able to use Device.asm functions
85 call FindDPT_ForNewDriveToDSDI
86 eMOVZX ax, bh
87 mov [di+DPT.wFlags], ax
88 call CreateDPT_StoreIdevarsOffsetAndBasePortFromCSBPtoDPTinDSDI
89 call IdeDPT_StoreDeviceTypeToDPTinDSDIfromIdevarsInCSBP
90 mov BYTE [di+DPT_ATA.bBlockSize], 1 ; Block = 1 sector
91
92 ; Wait until drive motors have reached full speed
93 cmp bp, BYTE ROMVARS.ideVars0 ; First controller?
94 jne SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster
95 test bh, FLG_DRVNHEAD_DRV ; Wait already done for Master
96 jnz SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster
97 mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_MOTOR_STARTUP, FLG_STATUS_BSY)
98 call IdeWait_PollStatusFlagInBLwithTimeoutInBH
99.SkipLongWaitSinceDriveIsNotPrimaryMaster:
100
101 ; Create IDEPACK without INTPACK
102 push bp
103 call Idepack_FakeToSSBP
104
105%ifdef MODULE_8BIT_IDE
106 push si
107
108 ; Enable 8-bit PIO for DEVICE_8BIT_ATA (no need to verify device type here)
109 call AH9h_Enable8bitModeForDevice8bitAta
110
111 ; Set XT-CF mode. No need to check here if device is XT-CF or not.
112%ifdef MODULE_8BIT_IDE_ADVANCED
113 call AH1Eh_GetCurrentXTCFmodeToAX ; Reads from DPT_ATA.bDevice that we just stored
114 call AH9h_SetModeFromALtoXTCF ; Enables/disables 8-bit mode when necessary
115%endif ; MODULE_8BIT_IDE_ADVANCED
116 pop si
117%endif ; MODULE_8BIT_IDE
118
119 ; Prepare to output Identify Device command
120 mov dl, 1 ; Sector count (required by IdeTransfer.asm)
121 mov al, COMMAND_IDENTIFY_DEVICE
122 mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ)
123 call Idepack_StoreNonExtParametersAndIssueCommandFromAL
124
125 ; Clean stack and return
126 lea sp, [bp+SIZE_OF_IDEPACK_WITHOUT_INTPACK] ; This assumes BP hasn't changed between Idepack_FakeToSSBP and here
127 pop bp
128 ret
129
130
131;--------------------------------------------------------------------
132; IdeCommand_OutputWithParameters
133; Parameters:
134; BH: System timer ticks for timeout
135; BL: IDE Status Register bit to poll after command
136; ES:SI: Ptr to buffer (for data transfer commands)
137; DS:DI: Ptr to DPT (in RAMVARS segment)
138; SS:BP: Ptr to IDEPACK
139; Returns:
140; AH: INT 13h Error Code
141; CX: Number of successfully transferred sectors (for transfer commands)
142; CF: Cleared if success, Set if error
143; Corrupts registers:
144; AL, BX, (CX), DX, (ES:SI for data transfer commands)
145;--------------------------------------------------------------------
146ALIGN JUMP_ALIGN
147IdeCommand_OutputWithParameters: ; Unused entrypoint OK
148 push bx ; Store status register bits to poll
149
150 ; Select Master or Slave drive and output head number or LBA28 top bits
151 call IdeCommand_SelectDrive
152 jc SHORT .DriveNotReady
153
154 ; Output Device Control Byte to enable or disable interrupts
155 mov al, [bp+IDEPACK.bDeviceControl]
156%ifdef MODULE_IRQ
157 test al, FLG_DEVCONTROL_nIEN ; Interrupts disabled?
158 jnz SHORT .DoNotSetInterruptInServiceFlag
159
160 ; Clear Task Flag and set Interrupt In-Service Flag
161 push ds
162 LOAD_BDA_SEGMENT_TO ds, dx
163 mov BYTE [BDA.bHDTaskFlg], 1 ; Will be adjusted to zero later
164 pop ds
165.DoNotSetInterruptInServiceFlag:
166%endif
167 OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out
168
169 ; Output Feature Number
170 mov al, [bp+IDEPACK.bFeatures]
171 OUTPUT_AL_TO_IDE_REGISTER FEATURES_REGISTER_out
172
173 ; Output Sector Address High (only used by LBA48)
174%ifdef MODULE_EBIOS
175 eMOVZX ax, [bp+IDEPACK.bLbaLowExt] ; Zero sector count
176 xchg al, ah ; LBA low ext to AH, zero sectors to AL
177 mov cx, [bp+IDEPACK.wLbaMiddleAndHighExt]
178 call OutputSectorCountAndAddress
179%endif
180
181 ; Output Sector Address Low
182 mov ax, [bp+IDEPACK.wSectorCountAndLbaLow]
183 mov cx, [bp+IDEPACK.wLbaMiddleAndHigh]
184 call OutputSectorCountAndAddress
185
186 ; Output command
187 mov al, [bp+IDEPACK.bCommand]
188 OUTPUT_AL_TO_IDE_REGISTER COMMAND_REGISTER_out
189
190 ; Wait until command completed
191 pop bx ; Pop status and timeout for polling
192 cmp bl, FLG_STATUS_DRQ ; Data transfer started?
193 jne SHORT .WaitUntilNonTransferCommandCompletes
194%ifdef MODULE_8BIT_IDE_ADVANCED
195 cmp BYTE [di+DPT_ATA.bDevice], DEVICE_8BIT_JRIDE_ISA
196 jae SHORT JrIdeTransfer_StartWithCommandInAL ; DEVICE_8BIT_JRIDE_ISA or DEVICE_8BIT_ADP50L
197%endif
198 jmp IdeTransfer_StartWithCommandInAL
199
200.WaitUntilNonTransferCommandCompletes:
201%ifdef MODULE_IRQ
202 test BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN
203%ifdef USE_386
204 jnz IdeWait_IRQorStatusFlagInBLwithTimeoutInBH
205%else
206 jz SHORT .PollStatusFlagInsteadOfWaitIrq
207 jmp IdeWait_IRQorStatusFlagInBLwithTimeoutInBH
208.PollStatusFlagInsteadOfWaitIrq:
209%endif
210%endif ; MODULE_IRQ
211 jmp IdeWait_PollStatusFlagInBLwithTimeoutInBH
212
213.DriveNotReady:
214 pop bx ; Clean stack
215 ret
216
217
218;--------------------------------------------------------------------
219; IdeCommand_SelectDrive
220; Parameters:
221; DS:DI: Ptr to DPT (in RAMVARS segment)
222; SS:BP: Ptr to IDEPACK
223; Returns:
224; AH: INT 13h Error Code
225; CF: Cleared if success, Set if error
226; Corrupts registers:
227; AL, BX, CX, DX
228;--------------------------------------------------------------------
229ALIGN JUMP_ALIGN
230IdeCommand_SelectDrive:
231 ; We use different timeout value when detecting drives.
232 ; This prevents unnecessary long delays when drive is not present.
233 mov cx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY)
234 cmp WORD [RAMVARS.wDrvDetectSignature], RAMVARS_DRV_DETECT_SIGNATURE
235 eCMOVE ch, TIMEOUT_SELECT_DRIVE_DURING_DRIVE_DETECTION
236
237 ; Select Master or Slave Drive
238 mov al, [bp+IDEPACK.bDrvAndHead]
239 OUTPUT_AL_TO_IDE_REGISTER DRIVE_AND_HEAD_SELECT_REGISTER
240 mov bx, cx
241 call IdeWait_PollStatusFlagInBLwithTimeoutInBH
242
243 ; Output again to make sure head bits are set. They were lost if the device
244 ; was busy when we first output drive select (although it shouldn't be busy
245 ; since we have waited error result after previous command). Some low power
246 ; drives (CF cards, 1.8" HDDs etc) have some internal sleep modes that
247 ; might cause trouble? Normal HDDs seem to work fine.
248 ;
249 ; Now commented away since this fix was not necessary. Let's keep it here
250 ; if some drive someday has problems crossing 8GB
251 ;mov al, [bp+IDEPACK.bDrvAndHead]
252 ;OUTPUT_AL_TO_IDE_REGISTER DRIVE_AND_HEAD_SELECT_REGISTER
253
254 ; Ignore errors from IDE Error Register (set by previous command)
255 cmp ah, RET_HD_TIMEOUT
256 je SHORT .FailedToSelectDrive
257 xor ax, ax ; Always success unless timeout
258 ret
259.FailedToSelectDrive:
260 stc
261 ret
262
263
264;--------------------------------------------------------------------
265; OutputSectorCountAndAddress
266; Parameters:
267; AH: LBA low bits (Sector Number)
268; AL: Sector Count
269; CL: LBA middle bits (Cylinder Number low)
270; CH: LBA high bits (Cylinder Number high)
271; DS:DI: Ptr to DPT (in RAMVARS segment)
272; Returns:
273; Nothing
274; Corrupts registers:
275; AL, BX, DX
276;--------------------------------------------------------------------
277ALIGN JUMP_ALIGN
278OutputSectorCountAndAddress:
279 OUTPUT_AL_TO_IDE_REGISTER SECTOR_COUNT_REGISTER
280
281 mov al, ah
282 OUTPUT_AL_TO_IDE_REGISTER LBA_LOW_REGISTER
283
284 mov al, cl
285 OUTPUT_AL_TO_IDE_REGISTER LBA_MIDDLE_REGISTER
286
287 mov al, ch
288 OUTPUT_AL_TO_IDE_REGISTER LBA_HIGH_REGISTER
289 ret
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