1 /*++ 2 3 Copyright (c) 1999 - 2014, Intel Corporation. All rights reserved 4 5 This program and the accompanying materials are licensed and made available under 6 the terms and conditions of the BSD License that accompanies this distribution. 7 The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license.php. 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 13 14 15 Module Name: 16 17 IgdOSBCB.ASL 18 19 Abstract: 20 21 IGD OpRegion/Software SCI Reference Code for the Baytrail Family. 22 This file contains the system BIOS call back functionality for the 23 OpRegion/Software SCI mechanism. 24 25 --*/ 26 27 28 Method (SBCB, 0, Serialized) 29 { 30 31 // Supported Callbacks: Sub-function 0 32 33 If (LEqual(GESF, 0x0)) 34 { 35 36 //<TODO> An OEM may support the driver->SBIOS status callbacks, but 37 // the supported callbacks value must be modified. The code that is 38 // executed upon reception of the callbacks must be also be updated 39 // to perform the desired functionality. 40 41 Store(0x00000000, PARM) // No callbacks supported 42 43 If(LEqual(PFLV,FMBL)) 44 { 45 Store(0x000F87FD, PARM) // Mobile 46 } 47 If(LEqual(PFLV,FDTP)) 48 { 49 Store(0x000F87BD, PARM) // Desktop 50 } 51 52 Store(Zero, GESF) // Clear the exit parameter 53 Return(SUCC) // "Success" 54 } 55 56 // BIOS POST Completion: Sub-function 1 57 58 If (LEqual(GESF, 1)) 59 { 60 Store(Zero, GESF) // Clear the exit parameter 61 Store(Zero, PARM) 62 Return(SUCC) // Not supported, but no failure 63 } 64 65 // Pre-Hires Set Mode: Sub-function 3 66 67 If (LEqual(GESF, 3)) 68 { 69 Store(Zero, GESF) // Clear the exit parameter 70 Store(Zero, PARM) 71 Return(SUCC) // Not supported, but no failure 72 } 73 74 // Post-Hires Set Mode: Sub-function 4 75 76 If (LEqual(GESF, 4)) 77 { 78 Store(Zero, GESF) // Clear the exit parameter 79 Store(Zero, PARM) 80 Return(SUCC) // Not supported, but no failure 81 } 82 83 // Display Switch: Sub-function 5 84 85 If (LEqual(GESF, 5)) 86 { 87 Store(Zero, GESF) // Clear the exit parameter 88 Store(Zero, PARM) 89 Return(SUCC) // Not supported, but no failure 90 } 91 92 // Set TV format: Sub-function 6 93 94 If (LEqual(GESF, 6)) 95 { 96 97 //<TODO> If implemented, the input values must be saved into 98 // non-volatile storage for parsing during the next boot. The 99 // following Sample code is Intel validated implementation. 100 101 Store(And(PARM, 0x0F), ITVF) 102 Store(ShiftRight(And(PARM, 0xF0), 4), ITVM) 103 Store(Zero, GESF) // Clear the exit parameter 104 Store(Zero, PARM) 105 Return(SUCC) 106 } 107 108 // Adapter Power State: Sub-function 7 109 110 If (LEqual(GESF, 7)) 111 { 112 113 // Upon notification from driver that the Adapter Power State = D0, 114 // check if previous lid event failed. If it did, retry the lid 115 // event here. 116 If(LEqual(PARM, 0)) 117 { 118 Store(CLID, Local0) 119 If(And(0x80000000,Local0)) 120 { 121 And(CLID, 0x0000000F, CLID) 122 GLID(CLID) 123 } 124 } 125 Store(Zero, GESF) // Clear the exit parameter 126 Store(Zero, PARM) 127 Return(SUCC) // Not supported, but no failure 128 } 129 130 // Display Power State: Sub-function 8 131 132 If (LEqual(GESF, 8)) 133 { 134 Store(Zero, GESF) // Clear the exit parameter 135 Store(Zero, PARM) 136 Return(SUCC) // Not supported, but no failure 137 } 138 139 // Set Boot Display: Sub-function 9 140 141 If (LEqual(GESF, 9)) 142 { 143 144 //<TODO> An OEM may elect to implement this method. In that case, 145 // the input values must be saved into non-volatile storage for 146 // parsing during the next boot. The following Sample code is Intel 147 // validated implementation. 148 149 And(PARM, 0xFF, IBTT) // Save the boot display to NVS 150 Store(Zero, GESF) // Clear the exit parameter 151 Store(Zero, PARM) 152 Return(SUCC) // Reserved, "Critical failure" 153 } 154 155 // Set Panel Details: Sub-function 10 (0Ah) 156 157 If (LEqual(GESF, 10)) 158 { 159 160 //<TODO> An OEM may elect to implement this method. In that case, 161 // the input values must be saved into non-volatile storage for 162 // parsing during the next boot. The following Sample code is Intel 163 // validated implementation. 164 165 // Set the panel-related NVRAM variables based the input from the driver. 166 167 And(PARM, 0xFF, IPSC) 168 169 // Change panel type if a change is requested by the driver (Change if 170 // panel type input is non-zero). Zero=No change requested. 171 172 If(And(ShiftRight(PARM, 8), 0xFF)) 173 { 174 And(ShiftRight(PARM, 8), 0xFF, IPAT) 175 Decrement(IPAT) // 0 = no change, so fit to CMOS map 176 } 177 And(ShiftRight(PARM, 18), 0x3, IBLC) 178 And(ShiftRight(PARM, 20), 0x7, IBIA) 179 Store(Zero, GESF) // Clear the exit parameter 180 Store(Zero, PARM) 181 Return(SUCC) // Success 182 } 183 184 // Set Internal Graphics: Sub-function 11 (0Bh) 185 186 If (LEqual(GESF, 11)) 187 { 188 189 //<TODO> An OEM may elect to implement this method. In that case, 190 // the input values must be saved into non-volatile storage for 191 // parsing during the next boot. The following Sample code is Intel 192 // validated implementation. 193 194 And(ShiftRight(PARM, 1), 1, IF1E) // Program the function 1 option 195 196 // Fixed memory/DVMT memory 197 198 And(ShiftRight(PARM, 17), 0xF, IDMS) // Program DVMT/fixed memory size 199 200 Store(Zero, GESF) // Clear the exit parameter 201 Store(Zero, PARM) 202 Return(SUCC) // Success 203 } 204 205 // Post-Hires to DOS FS: Sub-function 16 (10h) 206 207 If (LEqual(GESF, 16)) 208 { 209 Store(Zero, GESF) // Clear the exit parameter 210 Store(Zero, PARM) 211 Return(SUCC) // Not supported, but no failure 212 } 213 214 // APM Complete: Sub-function 17 (11h) 215 216 If (LEqual(GESF, 17)) 217 { 218 219 Store(ShiftLeft(LIDS, 8), PARM) // Report the lid state 220 Add(PARM, 0x100, PARM) // Adjust the lid state, 0 = Unknown 221 222 Store(Zero, GESF) // Clear the exit parameter 223 Return(SUCC) // Not supported, but no failure 224 } 225 226 // Set Spread Spectrum Clocks: Sub-function 18 (12h) 227 228 If (LEqual(GESF, 18)) 229 { 230 231 //<TODO> An OEM may elect to implement this method. In that case, 232 // the input values must be saved into non-volatile storage for 233 // parsing during the next boot. The following Sample code is Intel 234 // validated implementation. 235 236 If(And(PARM, 1)) 237 { 238 If(LEqual(ShiftRight(PARM, 1), 1)) 239 { 240 Store(1, ISSC) // Enable HW SSC, only for clock 1 241 } 242 Else 243 { 244 Store(Zero, GESF) 245 Return(CRIT) // Failure, as the SSC clock must be 1 246 } 247 } 248 Else 249 { 250 Store(0, ISSC) // Disable SSC 251 } 252 Store(Zero, GESF) // Clear the exit parameter 253 Store(Zero, PARM) 254 Return(SUCC) // Success 255 } 256 257 // Post VBE/PM Callback: Sub-function 19 (13h) 258 259 If (LEqual(GESF, 19)) 260 { 261 Store(Zero, GESF) // Clear the exit parameter 262 Store(Zero, PARM) 263 Return(SUCC) // Not supported, but no failure 264 } 265 266 // Set PAVP Data: Sub-function 20 (14h) 267 268 If (LEqual(GESF, 20)) 269 { 270 And(PARM, 0xF, PAVP) // Store PAVP info 271 Store(Zero, GESF) // Clear the exit parameter 272 Store(Zero, PARM) 273 Return(SUCC) // Success 274 } 275 276 // A call to a reserved "System BIOS callbacks" function was received 277 278 Store(Zero, GESF) // Clear the exit parameter 279 Return(SUCC) // Reserved, "Critical failure" 280 } 281
