1 /** @file ArmVExpressSysConfig.c 2 3 Copyright (c) 2011-2012, ARM Ltd. All rights reserved.<BR> 4 5 This program and the accompanying materials 6 are licensed and made available under the terms and conditions of the BSD License 7 which accompanies this distribution. 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 #include <Base.h> 16 #include <Library/IoLib.h> 17 #include <Library/DebugLib.h> 18 19 #include <Library/ArmPlatformSysConfigLib.h> 20 #include <ArmPlatform.h> 21 22 #include <Uefi.h> 23 #include <Library/UefiRuntimeLib.h> 24 25 // 26 // SYS_CFGCTRL Bits 27 // 28 #define SYS_CFGCTRL_START BIT31 29 #define SYS_CFGCTRL_READ (0 << 30) 30 #define SYS_CFGCTRL_WRITE (1 << 30) 31 #define SYS_CFGCTRL_FUNCTION(fun) (((fun ) & 0x3F) << 20) 32 #define SYS_CFGCTRL_SITE(site) (((site) & 0x3) << 16) 33 #define SYS_CFGCTRL_POSITION(pos) (((pos ) & 0xF) << 12) 34 #define SYS_CFGCTRL_DEVICE(dev) ((dev ) & 0xFFF) 35 36 // 37 // SYS_CFGSTAT Bits 38 // 39 #define SYS_CFGSTAT_ERROR BIT1 40 #define SYS_CFGSTAT_COMPLETE BIT0 41 42 /**************************************************************************** 43 * 44 * This file makes it easier to access the System Configuration Registers 45 * in the ARM Versatile Express motherboard. 46 * 47 ****************************************************************************/ 48 49 RETURN_STATUS 50 ArmPlatformSysConfigInitialize ( 51 VOID 52 ) 53 { 54 return RETURN_SUCCESS; 55 } 56 57 /*************************************** 58 * GENERAL FUNCTION: AccessSysCfgRegister 59 * Interacts with 60 * SYS_CFGSTAT 61 * SYS_CFGDATA 62 * SYS_CFGCTRL 63 * for setting and for reading out values 64 ***************************************/ 65 66 RETURN_STATUS 67 AccessSysCfgRegister ( 68 IN UINT32 ReadWrite, 69 IN UINT32 Function, 70 IN UINT32 Site, 71 IN UINT32 Position, 72 IN UINT32 Device, 73 IN OUT UINT32* Data 74 ) 75 { 76 UINT32 SysCfgCtrl; 77 78 if (EfiAtRuntime ()) { 79 return RETURN_UNSUPPORTED; 80 } 81 82 // Clear the COMPLETE bit 83 MmioAnd32(ARM_VE_SYS_CFGSTAT_REG, ~SYS_CFGSTAT_COMPLETE); 84 85 // If writing, then set the data value 86 if(ReadWrite == SYS_CFGCTRL_WRITE) { 87 MmioWrite32(ARM_VE_SYS_CFGDATA_REG, *Data); 88 } 89 90 // Set the control value 91 SysCfgCtrl = SYS_CFGCTRL_START | ReadWrite | SYS_CFGCTRL_FUNCTION(Function) | SYS_CFGCTRL_SITE(Site) | 92 SYS_CFGCTRL_POSITION(Position) | SYS_CFGCTRL_DEVICE(Device); 93 MmioWrite32(ARM_VE_SYS_CFGCTRL_REG, SysCfgCtrl); 94 95 // Wait until the COMPLETE bit is set 96 while ((MmioRead32(ARM_VE_SYS_CFGSTAT_REG) & SYS_CFGSTAT_COMPLETE) == 0); 97 98 // Check for errors 99 if(MmioRead32(ARM_VE_SYS_CFGSTAT_REG) & SYS_CFGSTAT_ERROR) { 100 return RETURN_DEVICE_ERROR; 101 } 102 103 // If reading then get the data value 104 if(ReadWrite == SYS_CFGCTRL_READ) { 105 *Data = MmioRead32(ARM_VE_SYS_CFGDATA_REG); 106 } 107 108 return RETURN_SUCCESS; 109 } 110 111 RETURN_STATUS 112 ArmPlatformSysConfigGet ( 113 IN SYS_CONFIG_FUNCTION Function, 114 OUT UINT32* Value 115 ) 116 { 117 UINT32 Site; 118 UINT32 Position; 119 UINT32 Device; 120 121 Position = 0; 122 Device = 0; 123 124 // Intercept some functions 125 switch(Function) { 126 127 case SYS_CFG_OSC_SITE1: 128 Function = SYS_CFG_OSC; 129 Site = ARM_VE_DAUGHTERBOARD_1_SITE; 130 break; 131 132 case SYS_CFG_OSC_SITE2: 133 Function = SYS_CFG_OSC; 134 Site = ARM_VE_DAUGHTERBOARD_2_SITE; 135 break; 136 137 case SYS_CFG_MUXFPGA: 138 Site = *Value; 139 break; 140 141 case SYS_CFG_OSC: 142 case SYS_CFG_VOLT: 143 case SYS_CFG_AMP: 144 case SYS_CFG_TEMP: 145 case SYS_CFG_RESET: 146 case SYS_CFG_SCC: 147 case SYS_CFG_DVIMODE: 148 case SYS_CFG_POWER: 149 Site = ARM_VE_MOTHERBOARD_SITE; 150 break; 151 152 case SYS_CFG_SHUTDOWN: 153 case SYS_CFG_REBOOT: 154 case SYS_CFG_RTC: 155 default: 156 return RETURN_UNSUPPORTED; 157 } 158 159 return AccessSysCfgRegister (SYS_CFGCTRL_READ, Function, Site, Position, Device, Value); 160 } 161 162 RETURN_STATUS 163 ArmPlatformSysConfigGetValues ( 164 IN SYS_CONFIG_FUNCTION Function, 165 IN UINTN Size, 166 OUT UINT32* Values 167 ) 168 { 169 return RETURN_UNSUPPORTED; 170 } 171 172 RETURN_STATUS 173 ArmPlatformSysConfigSet ( 174 IN SYS_CONFIG_FUNCTION Function, 175 IN UINT32 Value 176 ) 177 { 178 UINT32 Site; 179 UINT32 Position; 180 UINT32 Device; 181 182 Position = 0; 183 Device = 0; 184 185 // Intercept some functions 186 switch(Function) { 187 188 case SYS_CFG_OSC_SITE1: 189 Function = SYS_CFG_OSC; 190 Site = ARM_VE_DAUGHTERBOARD_1_SITE; 191 break; 192 193 case SYS_CFG_OSC_SITE2: 194 Function = SYS_CFG_OSC; 195 Site = ARM_VE_DAUGHTERBOARD_2_SITE; 196 break; 197 198 case SYS_CFG_MUXFPGA: 199 Site = Value; 200 break; 201 202 case SYS_CFG_RESET: 203 case SYS_CFG_SCC: 204 case SYS_CFG_SHUTDOWN: 205 case SYS_CFG_REBOOT: 206 case SYS_CFG_DVIMODE: 207 case SYS_CFG_POWER: 208 Site = ARM_VE_MOTHERBOARD_SITE; 209 break; 210 211 case SYS_CFG_OSC: 212 case SYS_CFG_VOLT: 213 case SYS_CFG_AMP: 214 case SYS_CFG_TEMP: 215 case SYS_CFG_RTC: 216 default: 217 return RETURN_UNSUPPORTED; 218 } 219 220 return AccessSysCfgRegister (SYS_CFGCTRL_WRITE, Function, Site, Position, Device, &Value); 221 } 222 223 RETURN_STATUS 224 ArmPlatformSysConfigSetDevice ( 225 IN SYS_CONFIG_FUNCTION Function, 226 IN UINT32 Device, 227 IN UINT32 Value 228 ) 229 { 230 UINT32 Site; 231 UINT32 Position; 232 233 Position = 0; 234 235 // Intercept some functions 236 switch(Function) { 237 case SYS_CFG_SCC: 238 #ifdef ARM_VE_SCC_BASE 239 if (EfiAtRuntime ()) { 240 return RETURN_UNSUPPORTED; 241 } 242 MmioWrite32 ((ARM_VE_SCC_BASE + (Device * 4)),Value); 243 return RETURN_SUCCESS; 244 #else 245 // There is no System Configuration Controller on the Model 246 return RETURN_UNSUPPORTED; 247 #endif 248 249 case SYS_CFG_OSC_SITE1: 250 Function = SYS_CFG_OSC; 251 Site = ARM_VE_DAUGHTERBOARD_1_SITE; 252 break; 253 254 case SYS_CFG_OSC_SITE2: 255 Function = SYS_CFG_OSC; 256 Site = ARM_VE_DAUGHTERBOARD_2_SITE; 257 break; 258 259 case SYS_CFG_MUXFPGA: 260 Site = Value; 261 break; 262 263 case SYS_CFG_RTC: 264 return RETURN_UNSUPPORTED; 265 //break; 266 267 case SYS_CFG_OSC: 268 case SYS_CFG_VOLT: 269 case SYS_CFG_AMP: 270 case SYS_CFG_TEMP: 271 case SYS_CFG_RESET: 272 case SYS_CFG_SHUTDOWN: 273 case SYS_CFG_REBOOT: 274 case SYS_CFG_DVIMODE: 275 case SYS_CFG_POWER: 276 Site = ARM_VE_MOTHERBOARD_SITE; 277 break; 278 default: 279 return RETURN_UNSUPPORTED; 280 } 281 282 return AccessSysCfgRegister (SYS_CFGCTRL_WRITE, Function, Site, Position, Device, &Value); 283 } 284
