Reka Norman | 2c439ad | 2021-10-07 16:08:18 +1100 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 2 | package main |
| 3 | |
| 4 | import ( |
| 5 | "encoding/json" |
| 6 | "fmt" |
| 7 | ) |
| 8 | |
| 9 | /* ------------------------------------------------------------------------------------------ */ |
| 10 | /* LP5-defined types */ |
| 11 | /* ------------------------------------------------------------------------------------------ */ |
| 12 | |
| 13 | type lp5 struct { |
| 14 | } |
| 15 | |
| 16 | type LP5MemAttributes struct { |
| 17 | /* Primary attributes - must be provided by JSON file for each part */ |
| 18 | DensityPerDieGb int |
| 19 | DiesPerPackage int |
| 20 | BitWidthPerChannel int |
| 21 | RanksPerChannel int |
| 22 | SpeedMbps int |
| 23 | |
| 24 | /* |
| 25 | * All the following parameters are optional and required only if the part requires |
| 26 | * special parameters as per the datasheet. |
| 27 | */ |
| 28 | /* Timing parameters */ |
| 29 | TRFCABNs int |
| 30 | TRFCPBNs int |
| 31 | TRPABMinNs int |
| 32 | TRPPBMinNs int |
| 33 | TCKMinPs int |
| 34 | TAAMinPs int |
| 35 | TRCDMinNs int |
| 36 | } |
| 37 | |
| 38 | type LP5DensityParams struct { |
| 39 | DensityEncoding byte |
| 40 | RowAddressBitsx8Channel int |
| 41 | RowAddressBitsx16Channel int |
| 42 | TRFCABNs int |
| 43 | TRFCPBNs int |
| 44 | } |
| 45 | |
| 46 | type LP5SpeedParams struct { |
| 47 | TCKMinPs int |
| 48 | MaxCASLatency int |
| 49 | } |
| 50 | |
| 51 | type LP5SPDAttribFunc func(*LP5MemAttributes) byte |
| 52 | |
| 53 | type LP5SPDAttribTableEntry struct { |
| 54 | constVal byte |
| 55 | getVal LP5SPDAttribFunc |
| 56 | } |
| 57 | |
| 58 | /* ------------------------------------------------------------------------------------------ */ |
| 59 | /* Constants */ |
| 60 | /* ------------------------------------------------------------------------------------------ */ |
| 61 | |
| 62 | const ( |
| 63 | /* SPD Byte Index */ |
| 64 | LP5SPDIndexSize = 0 |
| 65 | LP5SPDIndexRevision = 1 |
| 66 | LP5SPDIndexMemoryType = 2 |
| 67 | LP5SPDIndexModuleType = 3 |
| 68 | LP5SPDIndexDensityBanks = 4 |
| 69 | LP5SPDIndexAddressing = 5 |
| 70 | LP5SPDIndexPackageType = 6 |
| 71 | LP5SPDIndexOptionalFeatures = 7 |
| 72 | LP5SPDIndexModuleOrganization = 12 |
| 73 | LP5SPDIndexBusWidth = 13 |
| 74 | LP5SPDIndexTimebases = 17 |
| 75 | LP5SPDIndexTCKMin = 18 |
| 76 | LP5SPDIndexTAAMin = 24 |
| 77 | LP5SPDIndexTRCDMin = 26 |
| 78 | LP5SPDIndexTRPABMin = 27 |
| 79 | LP5SPDIndexTRPPBMin = 28 |
| 80 | LP5SPDIndexTRFCABMinLSB = 29 |
| 81 | LP5SPDIndexTRFCABMinMSB = 30 |
| 82 | LP5SPDIndexTRFCPBMinLSB = 31 |
| 83 | LP5SPDIndexTRFCPBMinMSB = 32 |
| 84 | LP5SPDIndexTRPPBMinFineOffset = 120 |
| 85 | LP5SPDIndexTRPABMinFineOffset = 121 |
| 86 | LP5SPDIndexTRCDMinFineOffset = 122 |
| 87 | LP5SPDIndexTAAMinFineOffset = 123 |
| 88 | LP5SPDIndexTCKMinFineOffset = 125 |
| 89 | LP5SPDIndexManufacturerPartNumberStartByte = 329 |
| 90 | LP5SPDIndexManufacturerPartNumberEndByte = 348 |
| 91 | |
| 92 | /* SPD Byte Value */ |
| 93 | |
| 94 | /* |
| 95 | * From JEDEC spec: |
| 96 | * 6:4 (Bytes total) = 2 (512 bytes) |
| 97 | * 3:0 (Bytes used) = 3 (384 bytes) |
| 98 | * Set to 0x23 for LPDDR5. |
| 99 | */ |
| 100 | LP5SPDValueSize = 0x23 |
| 101 | |
| 102 | /* |
| 103 | * Revision 1.0. |
| 104 | */ |
| 105 | LP5SPDValueRevision = 0x10 |
| 106 | |
| 107 | /* |
| 108 | * As per advisory #616599, ADL MRC expects LPDDR5 memory type = 0x13. |
| 109 | */ |
| 110 | LP5SPDValueMemoryType = 0x13 |
| 111 | |
| 112 | /* |
| 113 | * From JEDEC spec: |
| 114 | * 7:7 (Hybrid) = 0 (Not hybrid) |
| 115 | * 6:4 (Hybrid media) = 000 (Not hybrid) |
| 116 | * 3:0 (Base Module Type) = 1110 (Non-DIMM solution) |
| 117 | * |
| 118 | * This is dependent on hardware design. LPDDR5 only has memory down solution. |
| 119 | * Hence this is not hybrid non-DIMM solution. |
| 120 | * Set to 0x0E. |
| 121 | */ |
| 122 | LP5SPDValueModuleType = 0x0e |
| 123 | |
| 124 | /* |
| 125 | * From JEDEC spec: |
| 126 | * 5:4 (Maximum Activate Window) = 00 (8192 * tREFI) |
| 127 | * 3:0 (Maximum Activate Count) = 1000 (Unlimited MAC) |
| 128 | * Set to 0x08. |
| 129 | */ |
| 130 | LP5SPDValueOptionalFeatures = 0x08 |
| 131 | |
| 132 | /* |
| 133 | * For ADL (as per advisory #616599): |
| 134 | * 7:5 (Number of system channels) = 000 (1 channel always) |
| 135 | * 4:3 (Bus width extension) = 00 (no ECC) |
| 136 | * 2:0 (Bus width) = 001 (x16 always) |
| 137 | * Set to 0x01. |
| 138 | */ |
| 139 | LP5SPDValueBusWidth = 0x01 |
| 140 | |
| 141 | /* |
| 142 | * From JEDEC spec: |
| 143 | * 3:2 (MTB) = 00 (0.125ns) |
| 144 | * 1:0 (FTB) = 00 (1ps) |
| 145 | * Set to 0x00. |
| 146 | */ |
| 147 | LP5SPDValueTimebases = 0x00 |
| 148 | |
| 149 | /* As per JEDEC spec, unused digits of manufacturer part number are left as blank. */ |
| 150 | LP5SPDValueManufacturerPartNumberBlank = 0x20 |
| 151 | ) |
| 152 | |
| 153 | const ( |
| 154 | /* |
| 155 | * LPDDR5 has a flexible bank architecture with three programmable bank modes: BG, 8B, 16B. |
| 156 | * ADL will use 8B mode for all parts. |
| 157 | * |
| 158 | * From JEDEC spec: |
| 159 | * 7:6 (Bank Group Bits) = 00 (no bank groups) |
| 160 | * 5:4 (Bank Address Bits) = 01 (8 banks) |
| 161 | * Set bits 7:4 to 0b0001. |
| 162 | */ |
| 163 | LP5BankGroupsBanks = 0x1 |
| 164 | |
| 165 | /* |
| 166 | * Tables 8 and 9 from JESD209-5B. |
| 167 | * ADL uses 8B mode for all parts. The column addresses are the same for x8 and x16. |
| 168 | * Effective column address bits = column address bits + burst address bits = 6 + 5 = 11. |
| 169 | * As per JESD 21-C, this is encoded as 0b010. |
| 170 | */ |
| 171 | LP5ColumnAddressBits = 0x2 |
| 172 | ) |
| 173 | |
| 174 | /* ------------------------------------------------------------------------------------------ */ |
| 175 | /* Global variables */ |
| 176 | /* ------------------------------------------------------------------------------------------ */ |
| 177 | |
| 178 | var LP5PlatformSetMap = map[int][]int{ |
| 179 | 0: {PlatformADL}, |
| 180 | } |
| 181 | |
| 182 | var LP5PartAttributeMap = map[string]LP5MemAttributes{} |
| 183 | var LP5CurrSet int |
| 184 | |
| 185 | /* |
| 186 | * DensityEncoding: Maps the die density in Gb to the SPD encoding of the die density |
| 187 | * as per JESD 21-C. |
| 188 | * |
| 189 | * RowAddressBits: Maps the die density to the number of row address bits. |
| 190 | * Tables 6-11 in JESD209-5B (same for all three bank modes). |
| 191 | * |
| 192 | * TRFCABNs/TRFCPBNs: Maps the die density to the refresh timings. |
| 193 | * Tables 235 and 236 in JESD209-5B (same for all three bank modes). |
| 194 | */ |
| 195 | var LP5DensityGbToSPDEncoding = map[int]LP5DensityParams{ |
| 196 | 4: { |
| 197 | DensityEncoding: 0x4, |
| 198 | RowAddressBitsx8Channel: 15, |
| 199 | RowAddressBitsx16Channel: 14, |
| 200 | TRFCABNs: 180, |
| 201 | TRFCPBNs: 90, |
| 202 | }, |
| 203 | 6: { |
| 204 | DensityEncoding: 0xb, |
| 205 | RowAddressBitsx8Channel: 16, |
| 206 | RowAddressBitsx16Channel: 15, |
| 207 | TRFCABNs: 210, |
| 208 | TRFCPBNs: 120, |
| 209 | }, |
| 210 | 8: { |
| 211 | DensityEncoding: 0x5, |
| 212 | RowAddressBitsx8Channel: 16, |
| 213 | RowAddressBitsx16Channel: 15, |
| 214 | TRFCABNs: 210, |
| 215 | TRFCPBNs: 120, |
| 216 | }, |
| 217 | 12: { |
| 218 | DensityEncoding: 0x8, |
| 219 | RowAddressBitsx8Channel: 17, |
| 220 | RowAddressBitsx16Channel: 16, |
| 221 | TRFCABNs: 280, |
| 222 | TRFCPBNs: 140, |
| 223 | }, |
| 224 | 16: { |
| 225 | DensityEncoding: 0x6, |
| 226 | RowAddressBitsx8Channel: 17, |
| 227 | RowAddressBitsx16Channel: 16, |
| 228 | TRFCABNs: 280, |
| 229 | TRFCPBNs: 140, |
| 230 | }, |
| 231 | 24: { |
| 232 | DensityEncoding: 0x9, |
| 233 | RowAddressBitsx8Channel: 18, |
| 234 | RowAddressBitsx16Channel: 17, |
| 235 | TRFCABNs: 380, |
| 236 | TRFCPBNs: 190, |
| 237 | }, |
| 238 | 32: { |
| 239 | DensityEncoding: 0x7, |
| 240 | RowAddressBitsx8Channel: 18, |
| 241 | RowAddressBitsx16Channel: 17, |
| 242 | TRFCABNs: 380, |
| 243 | TRFCPBNs: 190, |
| 244 | }, |
| 245 | } |
| 246 | |
| 247 | /* |
| 248 | * Maps the number of row address bits to the SPD encoding as per JESD 21-C. |
| 249 | */ |
| 250 | var LP5RowAddressBitsEncoding = map[int]byte{ |
| 251 | 14: 0x2, |
| 252 | 15: 0x3, |
| 253 | 16: 0x4, |
| 254 | 17: 0x5, |
| 255 | 18: 0x6, |
| 256 | } |
| 257 | |
| 258 | /* |
| 259 | * TCKMinPs: |
| 260 | * LPDDR5 has two clocks: the command/address clock (CK) and the data clock (WCK). They are |
| 261 | * related by the WCK:CK ratio, which can be either 4:1 or 2:1. On ADL, 4:1 is used. |
| 262 | * For ADL, the MRC expects the tCKmin to encode the CK period. This is calculated as: |
| 263 | * tCKmin = 1 / CK rate |
| 264 | * = 1 / (WCK rate / WCK:CK) |
| 265 | * = 1 / (speed grade / 2 / WCK:CK) // "double data rate" |
| 266 | * |
| 267 | * MaxCASLatency: |
| 268 | * From Table 220 of JESD209-5B, using a 4:1 WCK:CK ratio and Set 0. |
| 269 | */ |
| 270 | var LP5SpeedMbpsToSPDEncoding = map[int]LP5SpeedParams{ |
| 271 | 6400: { |
| 272 | TCKMinPs: 1250, /* 1 / (6400 / 2 / 4) */ |
| 273 | MaxCASLatency: 17, |
| 274 | }, |
| 275 | 5500: { |
| 276 | TCKMinPs: 1455, /* 1 / (5500 / 2 / 4) */ |
| 277 | MaxCASLatency: 15, |
| 278 | }, |
| 279 | } |
| 280 | |
| 281 | var LP5SPDAttribTable = map[int]LP5SPDAttribTableEntry{ |
| 282 | LP5SPDIndexSize: {constVal: LP5SPDValueSize}, |
| 283 | LP5SPDIndexRevision: {constVal: LP5SPDValueRevision}, |
| 284 | LP5SPDIndexMemoryType: {constVal: LP5SPDValueMemoryType}, |
| 285 | LP5SPDIndexModuleType: {constVal: LP5SPDValueModuleType}, |
| 286 | LP5SPDIndexDensityBanks: {getVal: LP5EncodeDensityBanks}, |
| 287 | LP5SPDIndexAddressing: {getVal: LP5EncodeSdramAddressing}, |
| 288 | LP5SPDIndexPackageType: {getVal: LP5EncodePackageType}, |
| 289 | LP5SPDIndexOptionalFeatures: {constVal: LP5SPDValueOptionalFeatures}, |
| 290 | LP5SPDIndexModuleOrganization: {getVal: LP5EncodeModuleOrganization}, |
| 291 | LP5SPDIndexBusWidth: {constVal: LP5SPDValueBusWidth}, |
| 292 | LP5SPDIndexTimebases: {constVal: LP5SPDValueTimebases}, |
| 293 | LP5SPDIndexTCKMin: {getVal: LP5EncodeTCKMin}, |
| 294 | LP5SPDIndexTCKMinFineOffset: {getVal: LP5EncodeTCKMinFineOffset}, |
| 295 | LP5SPDIndexTAAMin: {getVal: LP5EncodeTAAMin}, |
| 296 | LP5SPDIndexTAAMinFineOffset: {getVal: LP5EncodeTAAMinFineOffset}, |
| 297 | LP5SPDIndexTRCDMin: {getVal: LP5EncodeTRCDMin}, |
| 298 | LP5SPDIndexTRCDMinFineOffset: {getVal: LP5EncodeTRCDMinFineOffset}, |
| 299 | LP5SPDIndexTRPABMin: {getVal: LP5EncodeTRPABMin}, |
| 300 | LP5SPDIndexTRPABMinFineOffset: {getVal: LP5EncodeTRPABMinFineOffset}, |
| 301 | LP5SPDIndexTRPPBMin: {getVal: LP5EncodeTRPPBMin}, |
| 302 | LP5SPDIndexTRPPBMinFineOffset: {getVal: LP5EncodeTRPPBMinFineOffset}, |
| 303 | LP5SPDIndexTRFCABMinLSB: {getVal: LP5EncodeTRFCABMinLsb}, |
| 304 | LP5SPDIndexTRFCABMinMSB: {getVal: LP5EncodeTRFCABMinMsb}, |
| 305 | LP5SPDIndexTRFCPBMinLSB: {getVal: LP5EncodeTRFCPBMinLsb}, |
| 306 | LP5SPDIndexTRFCPBMinMSB: {getVal: LP5EncodeTRFCPBMinMsb}, |
| 307 | } |
| 308 | |
| 309 | /* ------------------------------------------------------------------------------------------ */ |
| 310 | /* Functions */ |
| 311 | /* ------------------------------------------------------------------------------------------ */ |
| 312 | |
| 313 | func LP5EncodeDensityBanks(memAttribs *LP5MemAttributes) byte { |
| 314 | var b byte |
| 315 | |
| 316 | // 3:0 Density per die. |
| 317 | b = LP5DensityGbToSPDEncoding[memAttribs.DensityPerDieGb].DensityEncoding |
| 318 | |
| 319 | // 5:4 Bank address bits. |
| 320 | // 7:6 Bank group bits. |
| 321 | b |= LP5BankGroupsBanks << 4 |
| 322 | |
| 323 | return b |
| 324 | } |
| 325 | |
| 326 | func LP5EncodeSdramAddressing(memAttribs *LP5MemAttributes) byte { |
| 327 | var b byte |
| 328 | |
| 329 | // 2:0 Column address bits. |
| 330 | b = LP5ColumnAddressBits |
| 331 | |
| 332 | // 5:3 Row address bits. |
| 333 | density := memAttribs.DensityPerDieGb |
| 334 | var rowAddressBits int |
| 335 | if memAttribs.BitWidthPerChannel == 8 { |
| 336 | rowAddressBits = LP5DensityGbToSPDEncoding[density].RowAddressBitsx8Channel |
| 337 | } else { |
| 338 | rowAddressBits = LP5DensityGbToSPDEncoding[density].RowAddressBitsx16Channel |
| 339 | } |
| 340 | b |= LP5RowAddressBitsEncoding[rowAddressBits] << 3 |
| 341 | |
| 342 | return b |
| 343 | } |
| 344 | |
| 345 | func LP5EncodePackageType(memAttribs *LP5MemAttributes) byte { |
| 346 | var b byte |
| 347 | |
| 348 | // 1:0 Signal loading index. |
| 349 | b = 1 |
| 350 | |
| 351 | // 3:2 Channels per package. |
| 352 | // Channels per package = package width (e.g. x32) / bitWidthPerChannel (x8 or x16). |
| 353 | // This can equivalently be calculated as diesPerPackage / ranksPerChannel. |
| 354 | // This calculation is used to avoid adding a redundant attribute for package width. |
| 355 | channels := memAttribs.DiesPerPackage / memAttribs.RanksPerChannel |
| 356 | b |= byte(channels>>1) << 2 |
| 357 | |
| 358 | // 6:4 Dies per package. |
| 359 | b |= (byte(memAttribs.DiesPerPackage) - 1) << 4 |
| 360 | |
| 361 | // 7:7 Package type. |
| 362 | var packageType byte |
| 363 | if memAttribs.DiesPerPackage > 1 { |
| 364 | packageType = 1 // Non-Monolithic |
| 365 | } else { |
| 366 | packageType = 0 // Monolithic |
| 367 | } |
| 368 | b |= packageType << 7 |
| 369 | |
| 370 | return b |
| 371 | } |
| 372 | |
| 373 | func LP5EncodeModuleOrganization(memAttribs *LP5MemAttributes) byte { |
| 374 | var b byte |
| 375 | |
| 376 | // 2:0 Device data width per channel |
| 377 | b = byte(memAttribs.BitWidthPerChannel / 8) |
| 378 | |
| 379 | // 5:3 Package ranks per channel |
| 380 | b |= byte(memAttribs.RanksPerChannel-1) << 3 |
| 381 | |
| 382 | return b |
| 383 | } |
| 384 | |
| 385 | func LP5EncodeTCKMin(memAttribs *LP5MemAttributes) byte { |
| 386 | return convPsToMtbByte(memAttribs.TCKMinPs) |
| 387 | } |
| 388 | |
| 389 | func LP5EncodeTCKMinFineOffset(memAttribs *LP5MemAttributes) byte { |
| 390 | return convPsToFtbByte(memAttribs.TCKMinPs) |
| 391 | } |
| 392 | |
| 393 | func LP5EncodeTAAMin(memAttribs *LP5MemAttributes) byte { |
| 394 | return convPsToMtbByte(memAttribs.TAAMinPs) |
| 395 | } |
| 396 | |
| 397 | func LP5EncodeTAAMinFineOffset(memAttribs *LP5MemAttributes) byte { |
| 398 | return convPsToFtbByte(memAttribs.TAAMinPs) |
| 399 | } |
| 400 | |
| 401 | func LP5EncodeTRCDMin(memAttribs *LP5MemAttributes) byte { |
| 402 | return convNsToMtbByte(memAttribs.TRCDMinNs) |
| 403 | } |
| 404 | |
| 405 | func LP5EncodeTRCDMinFineOffset(memAttribs *LP5MemAttributes) byte { |
| 406 | return convNsToFtbByte(memAttribs.TRCDMinNs) |
| 407 | } |
| 408 | |
| 409 | func LP5EncodeTRPABMin(memAttribs *LP5MemAttributes) byte { |
| 410 | return convNsToMtbByte(memAttribs.TRPABMinNs) |
| 411 | } |
| 412 | |
| 413 | func LP5EncodeTRPABMinFineOffset(memAttribs *LP5MemAttributes) byte { |
| 414 | return convNsToFtbByte(memAttribs.TRPABMinNs) |
| 415 | } |
| 416 | |
| 417 | func LP5EncodeTRPPBMin(memAttribs *LP5MemAttributes) byte { |
| 418 | return convNsToMtbByte(memAttribs.TRPPBMinNs) |
| 419 | } |
| 420 | |
| 421 | func LP5EncodeTRPPBMinFineOffset(memAttribs *LP5MemAttributes) byte { |
| 422 | return convNsToFtbByte(memAttribs.TRPPBMinNs) |
| 423 | } |
| 424 | |
| 425 | func LP5EncodeTRFCABMinMsb(memAttribs *LP5MemAttributes) byte { |
| 426 | return byte((convNsToMtb(memAttribs.TRFCABNs) >> 8) & 0xff) |
| 427 | } |
| 428 | |
| 429 | func LP5EncodeTRFCABMinLsb(memAttribs *LP5MemAttributes) byte { |
| 430 | return byte(convNsToMtb(memAttribs.TRFCABNs) & 0xff) |
| 431 | } |
| 432 | |
| 433 | func LP5EncodeTRFCPBMinMsb(memAttribs *LP5MemAttributes) byte { |
| 434 | return byte((convNsToMtb(memAttribs.TRFCPBNs) >> 8) & 0xff) |
| 435 | } |
| 436 | |
| 437 | func LP5EncodeTRFCPBMinLsb(memAttribs *LP5MemAttributes) byte { |
| 438 | return byte(convNsToMtb(memAttribs.TRFCPBNs) & 0xff) |
| 439 | } |
| 440 | |
| 441 | func LP5UpdateTCKMin(memAttribs *LP5MemAttributes) { |
| 442 | if memAttribs.TCKMinPs == 0 { |
| 443 | memAttribs.TCKMinPs = LP5SpeedMbpsToSPDEncoding[memAttribs.SpeedMbps].TCKMinPs |
| 444 | } |
| 445 | } |
| 446 | |
| 447 | func LP5UpdateTAAMin(memAttribs *LP5MemAttributes) { |
| 448 | if memAttribs.TAAMinPs == 0 { |
| 449 | maxCAS := LP5SpeedMbpsToSPDEncoding[memAttribs.SpeedMbps].MaxCASLatency |
| 450 | memAttribs.TAAMinPs = memAttribs.TCKMinPs * maxCAS |
| 451 | } |
| 452 | } |
| 453 | |
| 454 | func LP5UpdateTRFCAB(memAttribs *LP5MemAttributes) { |
| 455 | if memAttribs.TRFCABNs == 0 { |
| 456 | memAttribs.TRFCABNs = LP5DensityGbToSPDEncoding[memAttribs.DensityPerDieGb].TRFCABNs |
| 457 | } |
| 458 | } |
| 459 | |
| 460 | func LP5UpdateTRFCPB(memAttribs *LP5MemAttributes) { |
| 461 | if memAttribs.TRFCPBNs == 0 { |
| 462 | memAttribs.TRFCPBNs = LP5DensityGbToSPDEncoding[memAttribs.DensityPerDieGb].TRFCPBNs |
| 463 | } |
| 464 | } |
| 465 | |
| 466 | func LP5UpdateTRCD(memAttribs *LP5MemAttributes) { |
| 467 | if memAttribs.TRCDMinNs == 0 { |
| 468 | /* Table 372 from JESD209-5B */ |
| 469 | memAttribs.TRCDMinNs = 18 |
| 470 | } |
| 471 | } |
| 472 | |
| 473 | func LP5UpdateTRPAB(memAttribs *LP5MemAttributes) { |
| 474 | if memAttribs.TRPABMinNs == 0 { |
| 475 | /* Table 372 from JESD209-5B */ |
| 476 | memAttribs.TRPABMinNs = 21 |
| 477 | } |
| 478 | } |
| 479 | |
| 480 | func LP5UpdateTRPPB(memAttribs *LP5MemAttributes) { |
| 481 | if memAttribs.TRPPBMinNs == 0 { |
| 482 | /* Table 372 from JESD209-5B */ |
| 483 | memAttribs.TRPPBMinNs = 18 |
| 484 | } |
| 485 | } |
| 486 | |
| 487 | func lp5UpdateMemoryAttributes(memAttribs *LP5MemAttributes) { |
| 488 | LP5UpdateTCKMin(memAttribs) |
| 489 | LP5UpdateTAAMin(memAttribs) |
| 490 | LP5UpdateTRFCAB(memAttribs) |
| 491 | LP5UpdateTRFCPB(memAttribs) |
| 492 | LP5UpdateTRCD(memAttribs) |
| 493 | LP5UpdateTRPAB(memAttribs) |
| 494 | LP5UpdateTRPPB(memAttribs) |
| 495 | } |
| 496 | |
| 497 | func LP5ValidateDensity(density int) error { |
| 498 | if _, ok := LP5DensityGbToSPDEncoding[density]; !ok { |
| 499 | return fmt.Errorf("Incorrect density per die: %d Gb", density) |
| 500 | } |
| 501 | return nil |
| 502 | } |
| 503 | |
| 504 | func LP5ValidateDies(dies int) error { |
| 505 | if dies != 2 && dies != 4 && dies != 8 { |
| 506 | return fmt.Errorf("Incorrect dies: %d", dies) |
| 507 | } |
| 508 | return nil |
| 509 | } |
| 510 | |
| 511 | func LP5ValidateDataWidth(width int) error { |
| 512 | if width != 8 && width != 16 { |
| 513 | return fmt.Errorf("Incorrect bit width: %d", width) |
| 514 | } |
| 515 | return nil |
| 516 | } |
| 517 | |
| 518 | func LP5ValidateRanks(ranks int) error { |
| 519 | if ranks != 1 && ranks != 2 { |
| 520 | return fmt.Errorf("Incorrect ranks: %d", ranks) |
| 521 | } |
| 522 | return nil |
| 523 | } |
| 524 | |
| 525 | func LP5ValidateSpeed(speed int) error { |
| 526 | if _, ok := LP5SpeedMbpsToSPDEncoding[speed]; !ok { |
| 527 | return fmt.Errorf("Incorrect speed: %d Mbps", speed) |
| 528 | } |
| 529 | return nil |
| 530 | } |
| 531 | |
| 532 | func lp5ValidateMemPartAttributes(memAttribs *LP5MemAttributes) error { |
| 533 | if err := LP5ValidateDensity(memAttribs.DensityPerDieGb); err != nil { |
| 534 | return err |
| 535 | } |
| 536 | if err := LP5ValidateDies(memAttribs.DiesPerPackage); err != nil { |
| 537 | return err |
| 538 | } |
| 539 | if err := LP5ValidateDataWidth(memAttribs.BitWidthPerChannel); err != nil { |
| 540 | return err |
| 541 | } |
| 542 | if err := LP5ValidateRanks(memAttribs.RanksPerChannel); err != nil { |
| 543 | return err |
| 544 | } |
| 545 | if err := LP5ValidateSpeed(memAttribs.SpeedMbps); err != nil { |
| 546 | return err |
| 547 | } |
| 548 | |
| 549 | return nil |
| 550 | } |
| 551 | |
| 552 | func LP5IsManufacturerPartNumberByte(index int) bool { |
| 553 | if index >= LP5SPDIndexManufacturerPartNumberStartByte && |
| 554 | index <= LP5SPDIndexManufacturerPartNumberEndByte { |
| 555 | return true |
| 556 | } |
| 557 | return false |
| 558 | } |
| 559 | |
| 560 | /* ------------------------------------------------------------------------------------------ */ |
| 561 | /* Interface Functions */ |
| 562 | /* ------------------------------------------------------------------------------------------ */ |
| 563 | |
| 564 | func (lp5) getSetMap() map[int][]int { |
| 565 | return LP5PlatformSetMap |
| 566 | } |
| 567 | |
| 568 | func (lp5) addNewPart(name string, attribs interface{}) error { |
| 569 | var lp5Attributes LP5MemAttributes |
| 570 | eByte, err := json.Marshal(attribs) |
| 571 | if err != nil { |
| 572 | return err |
| 573 | } |
| 574 | |
| 575 | if err := json.Unmarshal(eByte, &lp5Attributes); err != nil { |
| 576 | return err |
| 577 | } |
| 578 | |
| 579 | if err := lp5ValidateMemPartAttributes(&lp5Attributes); err != nil { |
| 580 | return err |
| 581 | } |
| 582 | |
| 583 | LP5PartAttributeMap[name] = lp5Attributes |
| 584 | return nil |
| 585 | } |
| 586 | |
| 587 | func (lp5) getSPDAttribs(name string, set int) (interface{}, error) { |
| 588 | lp5Attributes := LP5PartAttributeMap[name] |
| 589 | |
| 590 | LP5CurrSet = set |
| 591 | |
| 592 | lp5UpdateMemoryAttributes(&lp5Attributes) |
| 593 | |
| 594 | return lp5Attributes, nil |
| 595 | } |
| 596 | |
| 597 | func (lp5) getSPDLen() int { |
| 598 | return 512 |
| 599 | } |
| 600 | |
| 601 | func (lp5) getSPDByte(index int, attribs interface{}) byte { |
| 602 | e, ok := LP5SPDAttribTable[index] |
| 603 | if !ok { |
| 604 | if LP5IsManufacturerPartNumberByte(index) { |
| 605 | return LP5SPDValueManufacturerPartNumberBlank |
| 606 | } |
| 607 | return 0x00 |
| 608 | } |
| 609 | |
| 610 | if e.getVal != nil { |
| 611 | var lp5Attribs LP5MemAttributes |
| 612 | lp5Attribs = attribs.(LP5MemAttributes) |
| 613 | return e.getVal(&lp5Attribs) |
| 614 | } |
| 615 | |
| 616 | return e.constVal |
| 617 | } |