source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeCommand.asm@ 534

Last change on this file since 534 was 526, checked in by krille_n_@…, 12 years ago

Changes:

  • Update of the copyright notices to include the year 2013.
File size: 8.7 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:
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; DX: Autodetected port for XT-CF
59; DS: Segment to RAMVARS
60; ES:SI: Ptr to buffer to receive 512-byte IDE Information
61; CS:BP: Ptr to IDEVARS
62; Returns:
63; AH: INT 13h Error Code
64; CF: Cleared if success, Set if error
65; Corrupts registers:
66; AL, BX, CX, DX, SI, DI, ES
67;--------------------------------------------------------------------
68IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH:
69 ; Create fake DPT to be able to use Device.asm functions
70 call FindDPT_ForNewDriveToDSDI
71 eMOVZX ax, bh
72 mov [di+DPT.wFlags], ax
73 call CreateDPT_StoreIdevarsOffsetAndBasePortFromCSBPtoDPTinDSDI
74 call IdeDPT_StoreDeviceTypeToDPTinDSDIfromIdevarsInCSBP
75 mov BYTE [di+DPT_ATA.bBlockSize], 1 ; Block = 1 sector
76
77 ; Wait until drive motors have reached full speed
78 cmp bp, BYTE ROMVARS.ideVars0 ; First controller?
79 jne SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster
80 test bh, FLG_DRVNHEAD_DRV ; Wait already done for Master
81 jnz SHORT .SkipLongWaitSinceDriveIsNotPrimaryMaster
82 mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_MOTOR_STARTUP, FLG_STATUS_DRDY)
83 call IdeWait_PollStatusFlagInBLwithTimeoutInBH
84.SkipLongWaitSinceDriveIsNotPrimaryMaster:
85
86 ; Create IDEPACK without INTPACK
87 push bp
88 call Idepack_FakeToSSBP
89
90%ifdef MODULE_8BIT_IDE_ADVANCED
91 ; Enable 8-bit PIO mode for 8-bit ATA and XT-CF
92 push si
93 call AH9h_Enable8bitModeForDevice8bitAta
94 xor al, al ; XTCF_8BIT_PIO_MODE
95 call AH9h_SetModeFromALtoXTCF
96 pop si
97%endif ; MODULE_8BIT_IDE_ADVANCED
98
99 ; Prepare to output Identify Device command
100 mov dl, 1 ; Sector count (required by IdeTransfer.asm)
101 mov al, COMMAND_IDENTIFY_DEVICE
102 mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ)
103 call Idepack_StoreNonExtParametersAndIssueCommandFromAL
104
105 ; Clean stack and return
106.FailedToSet8bitMode:
107 lea sp, [bp+SIZE_OF_IDEPACK_WITHOUT_INTPACK] ; This assumes BP hasn't changed between Idepack_FakeToSSBP and here
108 pop bp
109 ret
110
111
112;--------------------------------------------------------------------
113; IdeCommand_OutputWithParameters
114; Parameters:
115; BH: System timer ticks for timeout
116; BL: IDE Status Register bit to poll after command
117; ES:SI: Ptr to buffer (for data transfer commands)
118; DS:DI: Ptr to DPT (in RAMVARS segment)
119; SS:BP: Ptr to IDEPACK
120; Returns:
121; AH: INT 13h Error Code
122; CX: Number of successfully transferred sectors (for transfer commands)
123; CF: Cleared if success, Set if error
124; Corrupts registers:
125; AL, BX, (CX), DX, (ES:SI for data transfer commands)
126;--------------------------------------------------------------------
127ALIGN JUMP_ALIGN
128IdeCommand_OutputWithParameters:
129 push bx ; Store status register bits to poll
130
131 ; Select Master or Slave drive and output head number or LBA28 top bits
132 call IdeCommand_SelectDrive
133 jc SHORT .DriveNotReady
134
135 ; Output Device Control Byte to enable or disable interrupts
136 mov al, [bp+IDEPACK.bDeviceControl]
137%ifdef MODULE_IRQ
138 test al, FLG_DEVCONTROL_nIEN ; Interrupts disabled?
139 jnz SHORT .DoNotSetInterruptInServiceFlag
140
141 ; Clear Task Flag and set Interrupt In-Service Flag
142 or BYTE [di+DPT.bFlagsHigh], FLGH_DPT_INTERRUPT_IN_SERVICE
143 push ds
144 LOAD_BDA_SEGMENT_TO ds, dx, ! ; Also zero DX
145 mov [BDA.bHDTaskFlg], dl
146 pop ds
147.DoNotSetInterruptInServiceFlag:
148%endif
149 OUTPUT_AL_TO_IDE_CONTROL_BLOCK_REGISTER DEVICE_CONTROL_REGISTER_out
150
151 ; Output Feature Number
152 mov al, [bp+IDEPACK.bFeatures]
153 OUTPUT_AL_TO_IDE_REGISTER FEATURES_REGISTER_out
154
155 ; Output Sector Address High (only used by LBA48)
156%ifdef MODULE_EBIOS
157 eMOVZX ax, [bp+IDEPACK.bLbaLowExt] ; Zero sector count
158 mov cx, [bp+IDEPACK.wLbaMiddleAndHighExt]
159 call OutputSectorCountAndAddress
160%endif
161
162 ; Output Sector Address Low
163 mov ax, [bp+IDEPACK.wSectorCountAndLbaLow]
164 mov cx, [bp+IDEPACK.wLbaMiddleAndHigh]
165 call OutputSectorCountAndAddress
166
167 ; Output command
168 mov al, [bp+IDEPACK.bCommand]
169 OUTPUT_AL_TO_IDE_REGISTER COMMAND_REGISTER_out
170
171 ; Wait until command completed
172 pop bx ; Pop status and timeout for polling
173 cmp bl, FLG_STATUS_DRQ ; Data transfer started?
174 jne SHORT .WaitUntilNonTransferCommandCompletes
175%ifdef MODULE_8BIT_IDE_ADVANCED
176 cmp BYTE [di+DPT_ATA.bDevice], DEVICE_8BIT_XTCF_MEMMAP
177 jae SHORT JrIdeTransfer_StartWithCommandInAL ; DEVICE_8BIT_XTCF_MEMMAP or DEVICE_8BIT_JRIDE_ISA
178%endif
179 jmp IdeTransfer_StartWithCommandInAL
180
181.WaitUntilNonTransferCommandCompletes:
182%ifdef MODULE_IRQ
183 test BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN
184 jz SHORT .PollStatusFlagInsteadOfWaitIrq
185 jmp IdeWait_IRQorStatusFlagInBLwithTimeoutInBH
186.PollStatusFlagInsteadOfWaitIrq:
187%endif
188 jmp IdeWait_PollStatusFlagInBLwithTimeoutInBH
189
190.DriveNotReady:
191 pop bx ; Clean stack
192 ret
193
194
195;--------------------------------------------------------------------
196; IdeCommand_SelectDrive
197; Parameters:
198; DS:DI: Ptr to DPT (in RAMVARS segment)
199; SS:BP: Ptr to IDEPACK
200; Returns:
201; AH: INT 13h Error Code
202; CF: Cleared if success, Set if error
203; Corrupts registers:
204; AL, BX, CX, DX
205;--------------------------------------------------------------------
206ALIGN JUMP_ALIGN
207IdeCommand_SelectDrive:
208 ; We use different timeout value when detecting drives.
209 ; This prevents unnecessary long delays when drive is not present.
210 mov cx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY)
211 cmp WORD [RAMVARS.wDrvDetectSignature], RAMVARS_DRV_DETECT_SIGNATURE
212 eCMOVE ch, TIMEOUT_SELECT_DRIVE_DURING_DRIVE_DETECTION
213
214 ; Select Master or Slave Drive
215 mov al, [bp+IDEPACK.bDrvAndHead]
216 OUTPUT_AL_TO_IDE_REGISTER DRIVE_AND_HEAD_SELECT_REGISTER
217 mov bx, cx
218 call IdeWait_PollStatusFlagInBLwithTimeoutInBH
219
220 ; Ignore errors from IDE Error Register (set by previous command)
221 cmp ah, RET_HD_TIMEOUT
222 je SHORT .FailedToSelectDrive
223 xor ax, ax ; Always success unless timeout
224 ret
225.FailedToSelectDrive:
226 stc
227 ret
228
229
230;--------------------------------------------------------------------
231; OutputSectorCountAndAddress
232; Parameters:
233; AH: LBA low bits (Sector Number)
234; AL: Sector Count
235; CL: LBA middle bits (Cylinder Number low)
236; CH: LBA high bits (Cylinder Number high)
237; DS:DI: Ptr to DPT (in RAMVARS segment)
238; Returns:
239; Nothing
240; Corrupts registers:
241; AL, BX, DX
242;--------------------------------------------------------------------
243ALIGN JUMP_ALIGN
244OutputSectorCountAndAddress:
245 OUTPUT_AL_TO_IDE_REGISTER SECTOR_COUNT_REGISTER
246
247 mov al, ah
248 OUTPUT_AL_TO_IDE_REGISTER LBA_LOW_REGISTER
249
250 mov al, cl
251 OUTPUT_AL_TO_IDE_REGISTER LBA_MIDDLE_REGISTER
252
253 mov al, ch
254 OUTPUT_AL_TO_IDE_REGISTER LBA_HIGH_REGISTER
255 ret
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