[587] | 1 | ; Project name : XTIDE Universal BIOS |
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| 2 | ; Description : Functions for initializing Promise |
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| 3 | ; PDC 20230 and 20630 VLB IDE Controllers. |
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| 4 | |
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| 5 | ; |
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| 6 | ; XTIDE Universal BIOS and Associated Tools |
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| 7 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
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| 8 | ; |
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| 9 | ; This program is free software; you can redistribute it and/or modify |
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| 10 | ; it under the terms of the GNU General Public License as published by |
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| 11 | ; the Free Software Foundation; either version 2 of the License, or |
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| 12 | ; (at your option) any later version. |
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| 13 | ; |
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| 14 | ; This program is distributed in the hope that it will be useful, |
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| 15 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | ; GNU General Public License for more details. |
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| 18 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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| 19 | ; |
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| 20 | |
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| 21 | ; Section containing code |
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| 22 | SECTION .text |
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| 23 | |
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| 24 | ;-------------------------------------------------------------------- |
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| 25 | ; PDC20x30_DetectControllerForIdeBaseInBX |
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| 26 | ; Parameters: |
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| 27 | ; BX: IDE Base Port |
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| 28 | ; Returns: |
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| 29 | ; AX: ID WORD for detected controller |
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| 30 | ; DX: Controller base port |
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| 31 | ; CF: Set if PDC detected |
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| 32 | ; Corrupts registers: |
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| 33 | ; BX (only when PDC detected) |
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| 34 | ;-------------------------------------------------------------------- |
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| 35 | PDC20x30_DetectControllerForIdeBaseInBX: |
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| 36 | mov dx, bx |
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| 37 | call EnablePdcProgrammingMode |
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[589] | 38 | jnz SHORT DisablePdcProgrammingMode.Return ; PDC controller not detected |
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| 39 | ; ePUSH_T ax, DisablePdcProgrammingMode ; Uncomment this if GetPdcIDtoAX needs to be a real function |
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| 40 | ; Fall to GetPdcIDtoAX |
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| 41 | |
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| 42 | ;-------------------------------------------------------------------- |
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| 43 | ; Programming mode must be enabled for this function. |
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| 44 | ; This function also enables PDC 20630 extra registers. |
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| 45 | ; |
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| 46 | ; GetPdcIDtoAX |
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| 47 | ; Parameters: |
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| 48 | ; DX: IDE Base port |
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| 49 | ; Returns: |
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| 50 | ; AH: PDC ID |
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| 51 | ; Corrupts registers: |
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| 52 | ; AL, BX |
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| 53 | ;-------------------------------------------------------------------- |
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| 54 | GetPdcIDtoAX: |
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| 55 | push dx |
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| 56 | |
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| 57 | ; Try to enable PDC 20630 extra registers |
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| 58 | add dx, BYTE LOW_CYLINDER_REGISTER |
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| 59 | in al, dx |
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| 60 | or al, FLG_PDCLCR_ENABLE_EXTRA_REGISTERS |
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| 61 | out dx, al |
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| 62 | |
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| 63 | ; Try to access PDC 20630 registers to see if they are available |
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| 64 | ; Hopefully this does not cause problems for systems with PDC 20230 |
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| 65 | add dx, BYTE PDC20630_INDEX_REGISTER - LOW_CYLINDER_REGISTER |
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| 66 | mov al, PDCREG7_STATUS ; Try to access PDC 20630 status register |
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| 67 | out dx, al |
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| 68 | xchg bx, ax |
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| 69 | in al, dx ; Does index register contain status register index? |
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| 70 | cmp al, bl |
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| 71 | mov ah, ID_PDC20630 |
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| 72 | eCMOVNE ah, ID_PDC20230 |
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| 73 | |
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| 74 | pop dx |
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| 75 | ; ret ; Uncomment this to make GetPdcIDtoAX a real function |
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[587] | 76 | ; Fall to DisablePdcProgrammingMode |
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| 77 | |
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| 78 | |
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| 79 | ;-------------------------------------------------------------------- |
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| 80 | ; DisablePdcProgrammingMode |
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| 81 | ; Parameters: |
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| 82 | ; DX: Base port |
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| 83 | ; Returns: |
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[589] | 84 | ; CF: Set |
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[587] | 85 | ; Corrupts registers: |
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| 86 | ; AL |
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| 87 | ;-------------------------------------------------------------------- |
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| 88 | DisablePdcProgrammingMode: |
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| 89 | add dx, BYTE HIGH_CYLINDER_REGISTER |
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| 90 | in al, dx |
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[589] | 91 | add dx, -HIGH_CYLINDER_REGISTER ; Sets CF for PDC20x30_DetectControllerForIdeBaseInBX |
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| 92 | .Return: |
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[587] | 93 | ret |
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| 94 | |
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| 95 | |
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| 96 | ;-------------------------------------------------------------------- |
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| 97 | ; EnablePdcProgrammingMode |
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| 98 | ; Parameters: |
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| 99 | ; DX: Base port |
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| 100 | ; Returns: |
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[589] | 101 | ; CF: Cleared |
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[587] | 102 | ; ZF: Set if programming mode enabled |
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| 103 | ; Corrupts registers: |
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| 104 | ; AL |
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| 105 | ;-------------------------------------------------------------------- |
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| 106 | EnablePdcProgrammingMode: |
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| 107 | ; Set bit 7 to sector count register |
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[589] | 108 | inc dx |
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| 109 | inc dx |
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| 110 | in al, dx ; 1F2h (SECTOR_COUNT_REGISTER) |
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[587] | 111 | or al, 80h |
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| 112 | out dx, al |
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| 113 | |
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| 114 | ; PDC detection sequence (should delay be added between register reads?) |
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| 115 | add dx, BYTE HIGH_CYLINDER_REGISTER - SECTOR_COUNT_REGISTER |
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| 116 | in al, dx ; 1F5h |
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| 117 | cli |
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| 118 | sub dx, BYTE HIGH_CYLINDER_REGISTER - SECTOR_COUNT_REGISTER |
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| 119 | in al, dx ; 1F2h |
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| 120 | add dx, STANDARD_CONTROL_BLOCK_OFFSET + (ALTERNATE_STATUS_REGISTER_in - SECTOR_COUNT_REGISTER) |
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| 121 | in al, dx ; 3F6h |
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| 122 | in al, dx ; 3F6h |
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| 123 | sub dx, STANDARD_CONTROL_BLOCK_OFFSET + (ALTERNATE_STATUS_REGISTER_in - SECTOR_COUNT_REGISTER) |
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| 124 | in al, dx ; 1F2h |
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| 125 | in al, dx ; 1F2h |
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| 126 | sti |
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| 127 | |
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| 128 | ; PDC20230C and PDC20630 clears the bit we set at the beginning |
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[592] | 129 | in al, dx ; 1F2h |
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[589] | 130 | dec dx |
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| 131 | dec dx ; Base port |
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| 132 | test al, 80h ; Clears CF |
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[587] | 133 | ret |
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| 134 | |
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| 135 | |
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| 136 | ;-------------------------------------------------------------------- |
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| 137 | ; PDC20x30_GetMaxPioModeToALandMinPioCycleTimeToBX |
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| 138 | ; Parameters: |
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| 139 | ; AX: ID WORD specific for detected controller |
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| 140 | ; Returns: |
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[592] | 141 | ; AL: Max supported PIO mode (only if ZF set) |
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| 142 | ; AH: ~FLGH_DPT_IORDY if IORDY not supported, -1 otherwise (only if ZF set) |
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[587] | 143 | ; BX: Min PIO cycle time (only if ZF set) |
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| 144 | ; ZF: Set if PIO limit necessary |
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| 145 | ; Cleared if no need to limit timings |
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| 146 | ; Corrupts registers: |
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| 147 | ; Nothing |
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| 148 | ;-------------------------------------------------------------------- |
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| 149 | PDC20x30_GetMaxPioModeToALandMinPioCycleTimeToBX: |
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[592] | 150 | cmp ah, ID_PDC20230 |
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| 151 | jne SHORT .Return ; No need to limit anything for ID_PDC20630 |
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| 152 | mov ax, (~FLGH_DPT_IORDY & 0FFh) << 8 | 2 ; Limit PIO to 2 for ID_PDC20230 |
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[587] | 153 | mov bx, PIO_2_MIN_CYCLE_TIME_NS |
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[589] | 154 | .Return: |
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[587] | 155 | ret |
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| 156 | |
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| 157 | |
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| 158 | ;-------------------------------------------------------------------- |
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| 159 | ; PDC20x30_InitializeForDPTinDSDI |
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| 160 | ; Parameters: |
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| 161 | ; DS:DI: Ptr to DPT for Single or Slave Drive |
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| 162 | ; Returns: |
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| 163 | ; AH: Int 13h return status |
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| 164 | ; CF: Cleared if success or no controller to initialize |
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| 165 | ; Set if error |
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| 166 | ; Corrupts registers: |
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| 167 | ; AL, BX, CX, DX |
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| 168 | ;-------------------------------------------------------------------- |
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| 169 | PDC20x30_InitializeForDPTinDSDI: |
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[589] | 170 | %ifdef USE_386 |
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| 171 | xor ch, ch |
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| 172 | test BYTE [di+DPT.bFlagsLow], FLGL_DPT_SLAVE |
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| 173 | setnz cl |
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| 174 | %else |
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[587] | 175 | xor cx, cx |
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| 176 | test BYTE [di+DPT.bFlagsLow], FLGL_DPT_SLAVE |
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[589] | 177 | jz SHORT .NotSlave |
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| 178 | inc cx |
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| 179 | .NotSlave: |
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| 180 | %endif |
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[587] | 181 | |
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| 182 | mov dx, [di+DPT.wBasePort] |
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| 183 | call EnablePdcProgrammingMode |
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| 184 | call SetSpeedForDriveInCX |
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| 185 | cmp BYTE [di+DPT_ADVANCED_ATA.wControllerID+1], ID_PDC20630 |
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[589] | 186 | jne SHORT .InitializationCompleted |
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[587] | 187 | call SetPdc20630SpeedForDriveInCX |
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[589] | 188 | .InitializationCompleted: |
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[587] | 189 | mov dx, [di+DPT.wBasePort] |
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| 190 | call DisablePdcProgrammingMode |
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| 191 | xor ah, ah |
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| 192 | ret |
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| 193 | |
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| 194 | |
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| 195 | ;-------------------------------------------------------------------- |
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| 196 | ; SetSpeedForDriveInCX |
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| 197 | ; Parameters: |
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| 198 | ; CX: 0 for master, 1 for slave drive |
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| 199 | ; DX: IDE Base port |
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| 200 | ; DS:DI: Ptr to DPT |
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| 201 | ; Returns: |
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| 202 | ; DX: Sector Number Register |
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| 203 | ; Corrupts registers: |
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| 204 | ; AX, BX |
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| 205 | ;-------------------------------------------------------------------- |
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| 206 | SetSpeedForDriveInCX: |
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[592] | 207 | mov bx, .rgbPioModeToPDCspeedValue |
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| 208 | mov al, [di+DPT_ADVANCED_ATA.bPioMode] |
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| 209 | MIN_U al, 2 ; Limit to PIO2 |
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| 210 | cs xlat |
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| 211 | xchg bx, ax |
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[587] | 212 | |
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| 213 | add dx, BYTE SECTOR_NUMBER_REGISTER |
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| 214 | mov bh, ~MASK_PDCSCR_DEV1SPEED ; Assume slave |
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[588] | 215 | inc cx |
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[589] | 216 | loop .SetSpeed |
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[587] | 217 | eSHL_IM bl, POS_PDCSCR_DEV0SPEED |
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| 218 | mov bh, ~MASK_PDCSCR_DEV0SPEED |
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[589] | 219 | .SetSpeed: |
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[587] | 220 | in al, dx |
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| 221 | and al, bh |
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| 222 | or al, bl |
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| 223 | cmp bl, 7 |
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[589] | 224 | jb SHORT .OutputNewValue |
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[587] | 225 | or al, FLG_PDCSCR_UNKNOWN_BIT7 ; Flag for PIO 2 and above? |
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[589] | 226 | .OutputNewValue: |
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| 227 | out dx, al |
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| 228 | ret |
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[587] | 229 | |
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| 230 | .rgbPioModeToPDCspeedValue: |
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| 231 | db 0 ; PIO 0 |
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| 232 | db 4 ; PIO 1 |
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| 233 | db 7 ; PIO 2 |
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| 234 | |
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| 235 | |
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| 236 | ;-------------------------------------------------------------------- |
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| 237 | ; SetPdc20630SpeedForDriveInCX |
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| 238 | ; Parameters: |
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| 239 | ; CX: 0 for master, 1 for slave drive |
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| 240 | ; DS:DI: Ptr to DPT |
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| 241 | ; DX: Sector Number Register |
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| 242 | ; Returns: |
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| 243 | ; DX: Low Cylinder Register |
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| 244 | ; Corrupts registers: |
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[589] | 245 | ; AX |
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[587] | 246 | ;-------------------------------------------------------------------- |
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| 247 | SetPdc20630SpeedForDriveInCX: |
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| 248 | inc dx ; LOW_CYLINDER_REGISTER |
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[589] | 249 | mov ah, ~(FLG_PDCLCR_DEV0SPEED_BIT4 | FLG_PDCLCR_DEV0IORDY) |
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| 250 | ror ah, cl |
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[587] | 251 | in al, dx |
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| 252 | and al, ah ; Clear drive specific bits |
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| 253 | cmp BYTE [di+DPT_ADVANCED_ATA.bPioMode], 2 |
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[589] | 254 | jbe .ClearBitsOnly |
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[587] | 255 | not ah |
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| 256 | or al, ah |
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[589] | 257 | .ClearBitsOnly: |
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[587] | 258 | out dx, al |
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| 259 | ret |
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| 260 | |
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