1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2012-2020 ASPEED Technology Inc. 4 * 5 * Copyright 2016 Google, Inc 6 */ 7 8 #include <common.h> 9 #include <clk.h> 10 #include <dm.h> 11 #include <errno.h> 12 #include <ram.h> 13 #include <regmap.h> 14 #include <reset.h> 15 #include <asm/io.h> 16 #include <asm/arch/scu_ast2600.h> 17 #include <asm/arch/sdram_ast2600.h> 18 #include <linux/err.h> 19 #include <linux/kernel.h> 20 #include <dt-bindings/clock/ast2600-clock.h> 21 #include "sdram_phy_ast2600.h" 22 23 /* in order to speed up DRAM init time, write pre-defined values to registers 24 * directly */ 25 #define AST2600_SDRAMMC_MANUAL_CLK 26 27 /* register offset */ 28 #define AST_SCU_FPGA_STATUS 0x004 29 #define AST_SCU_HANDSHAKE 0x100 30 #define AST_SCU_MPLL 0x220 31 #define AST_SCU_MPLL_EXT 0x224 32 #define AST_SCU_FPGA_PLL 0x400 33 #define AST_SCU_HW_STRAP 0x500 34 35 36 /* bit-field of AST_SCU_HW_STRAP */ 37 #define SCU_HWSTRAP_VGAMEM_SHIFT 13 38 #define SCU_HWSTRAP_VGAMEM_MASK GENMASK(14, 13) 39 #define SCU_HWSTRAP_DDR3 BIT(25) 40 41 42 /* bit-field of AST_SCU_HANDSHAKE */ 43 #define SCU_SDRAM_INIT_READY_MASK BIT(6) 44 #define SCU_SDRAM_INIT_BY_SOC_MASK BIT(7) 45 46 /* bit-field of AST_SCU_MPLL */ 47 #define SCU_MPLL_RESET BIT(25) 48 #define SCU_MPLL_BYPASS BIT(24) 49 #define SCU_MPLL_TURN_OFF BIT(23) 50 #define SCU_MPLL_FREQ_MASK GENMASK(22, 0) 51 52 #define SCU_MPLL_FREQ_400M 0x0008405F 53 #define SCU_MPLL_EXT_400M 0x00000031 54 //#define SCU_MPLL_FREQ_400M 0x0038007F 55 //#define SCU_MPLL_EXT_400M 0x0000003F 56 #define SCU_MPLL_FREQ_200M 0x0078007F 57 #define SCU_MPLL_EXT_200M 0x0000003F 58 59 /* MPLL configuration */ 60 #if defined(CONFIG_ASPEED_DDR4_800) 61 #define SCU_MPLL_FREQ_CFG SCU_MPLL_FREQ_200M 62 #define SCU_MPLL_EXT_CFG SCU_MPLL_EXT_200M 63 #elif defined(CONFIG_ASPEED_DDR4_1600) 64 #define SCU_MPLL_FREQ_CFG SCU_MPLL_FREQ_400M 65 #define SCU_MPLL_EXT_CFG SCU_MPLL_EXT_400M 66 #else 67 #error "undefined DDR4 target rate\n" 68 #endif 69 70 /* AC timing and SDRAM mode registers */ 71 #ifdef CONFIG_FPGA_ASPEED 72 /* mode register settings for FPGA are fixed */ 73 #define DDR4_MR01_MODE 0x03010100 74 #define DDR4_MR23_MODE 0x00000000 75 #define DDR4_MR45_MODE 0x04C00000 76 #define DDR4_MR6_MODE 0x00000050 77 #define DDR4_TRFC_FPGA 0x17263434 78 79 /* FPGA need for an additional initialization procedure: search read window */ 80 #define SEARCH_RDWIN_ANCHOR_0 (CONFIG_SYS_SDRAM_BASE + 0x0000) 81 #define SEARCH_RDWIN_ANCHOR_1 (CONFIG_SYS_SDRAM_BASE + 0x0004) 82 #define SEARCH_RDWIN_PTRN_0 0x12345678 83 #define SEARCH_RDWIN_PTRN_1 0xaabbccdd 84 #define SEARCH_RDWIN_PTRN_SUM 0xbcf02355 85 #else 86 /* mode register setting for real chip are derived from the model GDDR4-1600 */ 87 #define DDR4_MR01_MODE 0x03010510 88 #define DDR4_MR23_MODE 0x00000000 89 #define DDR4_MR45_MODE 0x04000000 90 #define DDR4_MR6_MODE 0x00000400 91 #define DDR4_TRFC_1600 0x467299f1 92 #define DDR4_TRFC_800 0x23394c78 93 #endif /* end of "#ifdef CONFIG_FPGA_ASPEED" */ 94 95 #if defined(CONFIG_FPGA_ASPEED) 96 #define DDR4_TRFC DDR4_TRFC_FPGA 97 #else 98 /* real chip setting */ 99 #if defined(CONFIG_ASPEED_DDR4_1600) 100 #define DDR4_TRFC DDR4_TRFC_1600 101 #define DDR4_PHY_TRAIN_TRFC 0xc30 102 #elif defined(CONFIG_ASPEED_DDR4_800) 103 #define DDR4_TRFC DDR4_TRFC_800 104 #define DDR4_PHY_TRAIN_TRFC 0x618 105 #else 106 #error "undefined tRFC setting" 107 #endif /* end of "#if (SCU_MPLL_FREQ_CFG == SCU_MPLL_FREQ_400M)" */ 108 #endif /* end of "#if defined(CONFIG_FPGA_ASPEED)" */ 109 110 /* supported SDRAM size */ 111 #define SDRAM_SIZE_1KB (1024U) 112 #define SDRAM_SIZE_1MB (SDRAM_SIZE_1KB * SDRAM_SIZE_1KB) 113 #define SDRAM_MIN_SIZE (256 * SDRAM_SIZE_1MB) 114 #define SDRAM_MAX_SIZE (2048 * SDRAM_SIZE_1MB) 115 116 117 DECLARE_GLOBAL_DATA_PTR; 118 119 /* 120 * Bandwidth configuration parameters for different SDRAM requests. 121 * These are hardcoded settings taken from Aspeed SDK. 122 */ 123 #ifdef CONFIG_FPGA_ASPEED 124 static const u32 ddr4_ac_timing[4] = {0x030C0207, 0x04451133, 0x0E010200, 125 0x00000140}; 126 127 static const u32 ddr_max_grant_params[4] = {0x88888888, 0x88888888, 0x88888888, 128 0x88888888}; 129 #else 130 static const u32 ddr4_ac_timing[4] = {0x040e0307, 0x0f4711f1, 0x0e060304, 131 0x00001240}; 132 133 static const u32 ddr_max_grant_params[4] = {0x44444444, 0x44444444, 0x44444444, 134 0x44444444}; 135 #endif 136 137 struct dram_info { 138 struct ram_info info; 139 struct clk ddr_clk; 140 struct ast2600_sdrammc_regs *regs; 141 void __iomem *scu; 142 struct ast2600_ddr_phy *phy; 143 void __iomem *phy_setting; 144 void __iomem *phy_status; 145 ulong clock_rate; 146 }; 147 148 static void ast2600_sdramphy_kick_training(struct dram_info *info) 149 { 150 #ifndef CONFIG_FPGA_ASPEED 151 struct ast2600_sdrammc_regs *regs = info->regs; 152 u32 volatile data; 153 154 writel(SDRAM_PHYCTRL0_NRST, ®s->phy_ctrl[0]); 155 udelay(5); 156 writel(SDRAM_PHYCTRL0_NRST | SDRAM_PHYCTRL0_INIT, ®s->phy_ctrl[0]); 157 udelay(1000); 158 159 while (1) { 160 data = readl(®s->phy_ctrl[0]) & SDRAM_PHYCTRL0_INIT; 161 if (~data) { 162 break; 163 } 164 } 165 166 #if 0 167 while (1) { 168 data = readl(0x1e6e0400) & BIT(1); 169 if (data) { 170 break; 171 } 172 } 173 #endif 174 #endif 175 } 176 177 /** 178 * @brief load DDR-PHY configurations table to the PHY registers 179 * @param[in] p_tbl - pointer to the configuration table 180 * @param[in] info - pointer to the DRAM info struct 181 * 182 * There are two sets of MRS (Mode Registers) configuration in ast2600 memory 183 * system: one is in the SDRAM MC (memory controller) which is used in run 184 * time, and the other is in the DDR-PHY IP which is used during DDR-PHY 185 * training. To make these two configurations align, we overwrite the DDR-PHY 186 * setting by the MC setting before DDR-PHY training. 187 */ 188 static void ast2600_sdramphy_init(u32 *p_tbl, struct dram_info *info) 189 { 190 #ifndef CONFIG_FPGA_ASPEED 191 u32 reg_base = (u32)info->phy_setting; 192 u32 addr = p_tbl[0]; 193 u32 data; 194 int i = 1; 195 196 debug("%s:reg base = 0x%08x, 1st addr = 0x%08x\n", __func__, reg_base, 197 addr); 198 199 /* load PHY configuration table into PHY-setting registers */ 200 while (1) { 201 if (addr < reg_base) { 202 debug("invalid DDR-PHY addr: 0x%08x\n", addr); 203 break; 204 } 205 data = p_tbl[i++]; 206 207 if (DDR_PHY_TBL_END == data) { 208 break; 209 } else if (DDR_PHY_TBL_CHG_ADDR == data) { 210 addr = p_tbl[i++]; 211 } else { 212 writel(data, addr); 213 addr += 4; 214 } 215 } 216 217 data = readl(info->phy_setting + 0x84) & ~GENMASK(16, 0); 218 data |= DDR4_PHY_TRAIN_TRFC; 219 writel(data, info->phy_setting + 0x84); 220 221 #ifdef CONFIG_ASPEED_DDR4_800 222 223 debug("Overwrite DDR-PHY MRS by MCR config\n"); 224 /* MR0 and MR1 */ 225 data = readl(&info->regs->mr01_mode_setting); 226 data = 227 ((data & GENMASK(15, 0)) << 16) | ((data & GENMASK(31, 16)) >> 16); 228 writel(data, reg_base + 0x58); 229 debug("[%08x] 0x%08x\n", reg_base + 0x58, data); 230 231 /* MR2 and MR3 */ 232 data = readl(&info->regs->mr23_mode_setting); 233 writel(data, reg_base + 0x54); 234 debug("[%08x] 0x%08x\n", reg_base + 0x54, data); 235 236 /* MR4 and MR5 */ 237 data = readl(&info->regs->mr45_mode_setting); 238 writel(data, reg_base + 0x5c); 239 debug("[%08x] 0x%08x\n", reg_base + 0x5c, data); 240 241 /* MR6 */ 242 data = readl(&info->regs->mr6_mode_setting); 243 writel(data, reg_base + 0x60); 244 debug("[%08x] 0x%08x\n", reg_base + 0x60, data); 245 #endif 246 #endif 247 } 248 249 static void ast2600_sdramphy_show_status(struct dram_info *info) 250 { 251 #ifndef CONFIG_FPGA_ASPEED 252 u32 value, tmp; 253 u32 reg_base = (u32)info->phy_status; 254 255 debug("\nSDRAM PHY training report:\n"); 256 /* training status */ 257 value = readl(reg_base + 0x00); 258 debug("rO_DDRPHY_reg offset 0x00 = 0x%08x\n", value); 259 if (value & BIT(3)) { 260 debug("\tinitial PVT calibration fail\n"); 261 } 262 if (value & BIT(5)) { 263 debug("\truntime calibration fail\n"); 264 } 265 266 /* PU & PD */ 267 value = readl(reg_base + 0x30); 268 debug("rO_DDRPHY_reg offset 0x30 = 0x%08x\n", value); 269 debug(" PU = 0x%02x\n", value & 0xff); 270 debug(" PD = 0x%02x\n", (value >> 16) & 0xff); 271 272 /* read eye window */ 273 value = readl(reg_base + 0x68); 274 debug("rO_DDRPHY_reg offset 0x68 = 0x%08x\n", value); 275 debug(" rising edge of read data eye training pass window\n"); 276 tmp = (((value & GENMASK(7, 0)) >> 0) * 100) / 255; 277 debug(" B0:%d%%\n", tmp); 278 tmp = (((value & GENMASK(15, 8)) >> 8) * 100) / 255; 279 debug(" B1:%d%%\n", tmp); 280 281 value = readl(reg_base + 0xC8); 282 debug("rO_DDRPHY_reg offset 0xC8 = 0x%08x\n", value); 283 debug(" falling edge of read data eye training pass window\n"); 284 tmp = (((value & GENMASK(7, 0)) >> 0) * 100) / 255; 285 debug(" B0:%d%%\n", tmp); 286 tmp = (((value & GENMASK(15, 8)) >> 8) * 100) / 255; 287 debug(" B1:%d%%\n", tmp); 288 289 /* write eye window */ 290 value = readl(reg_base + 0x7c); 291 debug("rO_DDRPHY_reg offset 0x7C = 0x%08x\n", value); 292 debug(" rising edge of write data eye training pass window\n"); 293 tmp = (((value & GENMASK(7, 0)) >> 0) * 100) / 255; 294 debug(" B0:%d%%\n", tmp); 295 tmp = (((value & GENMASK(15, 8)) >> 8) * 100) / 255; 296 debug(" B1:%d%%\n", tmp); 297 298 /* read Vref training result */ 299 value = readl(reg_base + 0x88); 300 debug("rO_DDRPHY_reg offset 0x88 = 0x%08x\n", value); 301 debug(" read Vref training result\n"); 302 tmp = (((value & GENMASK(7, 0)) >> 0) * 100) / 127; 303 debug(" B0:%d%%\n", tmp); 304 tmp = (((value & GENMASK(15, 8)) >> 8) * 100) / 127; 305 debug(" B1:%d%%\n", tmp); 306 307 /* write Vref training result */ 308 value = readl(reg_base + 0x90); 309 debug("rO_DDRPHY_reg offset 0x90 = 0x%08x\n", value); 310 tmp = (((value & GENMASK(5, 0)) >> 0) * 100) / 127; 311 debug(" write Vref training result = %d%%\n", tmp); 312 313 /* gate train */ 314 value = readl(reg_base + 0x50); 315 debug("rO_DDRPHY_reg offset 0x50 = 0x%08x\n", value); 316 debug(" gate training pass window\n"); 317 tmp = (((value & GENMASK(7, 0)) >> 0) * 100) / 255; 318 debug(" module 0: %d.%03d\n", (value >> 8) & 0xff, tmp); 319 tmp = (((value & GENMASK(23, 16)) >> 0) * 100) / 255; 320 debug(" module 1: %d.%03d\n", (value >> 24) & 0xff, tmp); 321 #endif 322 } 323 324 #define MC_TEST_PATTERN_N 8 325 static u32 as2600_sdrammc_test_pattern[MC_TEST_PATTERN_N] = { 326 0xcc33cc33, 0xff00ff00, 0xaa55aa55, 0x88778877, 327 0x92cc4d6e, 0x543d3cde, 0xf1e843c7, 0x7c61d253}; 328 329 #define DRAM_MapAdr 81000000 330 #define TIMEOUT_DRAM 5000000 331 int ast2600_sdrammc_dg_test(struct dram_info *info, unsigned int datagen, u32 mode) 332 { 333 unsigned int data; 334 unsigned int timeout = 0; 335 struct ast2600_sdrammc_regs *regs = info->regs; 336 337 writel(0, ®s->ecc_test_ctrl); 338 if (mode == 0) { 339 writel(0x00000085 | (datagen << 3), ®s->ecc_test_ctrl); 340 } else { 341 writel(0x000000C1 | (datagen << 3), ®s->ecc_test_ctrl); 342 } 343 344 do { 345 data = readl(®s->ecc_test_ctrl) & GENMASK(13, 12); 346 347 if (data & BIT(13)) 348 return (0); 349 350 if (++timeout > TIMEOUT_DRAM) { 351 printf("Timeout!!\n"); 352 writel(0, ®s->ecc_test_ctrl); 353 354 return (0); 355 } 356 } while (!data); 357 358 writel(0, ®s->ecc_test_ctrl); 359 360 return (1); 361 } 362 363 int ast2600_sdrammc_cbr_test(struct dram_info *info) 364 { 365 struct ast2600_sdrammc_regs *regs = info->regs; 366 u32 i; 367 368 writel((DRAM_MapAdr | 0x7fffff), ®s->test_addr); 369 370 /* single */ 371 for (i=0; i<8; i++) { 372 if(!ast2600_sdrammc_dg_test(info, i, 0)) return(0); 373 } 374 375 /* burst */ 376 for (i=0; i<8; i++) { 377 if(!ast2600_sdrammc_dg_test(info, i, i)) return(0); 378 } 379 380 return(1); 381 } 382 383 static int ast2600_sdrammc_test(struct dram_info *info) 384 { 385 struct ast2600_sdrammc_regs *regs = info->regs; 386 387 u32 pass_cnt = 0; 388 u32 fail_cnt = 0; 389 u32 target_cnt = 4; 390 u32 test_cnt = 0; 391 u32 pattern; 392 u32 i = 0; 393 bool finish = false; 394 395 debug("sdram mc test:\n"); 396 while (finish == false) { 397 pattern = as2600_sdrammc_test_pattern[i++]; 398 i = i % MC_TEST_PATTERN_N; 399 debug(" pattern = %08X : ",pattern); 400 writel(pattern, regs->test_init_val); 401 402 if (!ast2600_sdrammc_cbr_test(info)) { 403 debug("fail\n"); 404 fail_cnt++; 405 } else { 406 debug("pass\n"); 407 pass_cnt++; 408 } 409 410 if (++test_cnt == target_cnt) { 411 finish = true; 412 } 413 } 414 debug("statistics: pass/fail/total:%d/%d/%d\n", pass_cnt, fail_cnt, 415 target_cnt); 416 return fail_cnt; 417 } 418 419 /** 420 * scu500[14:13] 421 * 2b'00: VGA memory size = 8MB * 2^((0+1) & 0x3) = 16MB 422 * 2b'01: VGA memory size = 8MB * 2^((1+1) & 0x3) = 32MB 423 * 2b'10: VGA memory size = 8MB * 2^((2+1) & 0x3) = 64MB 424 * 2b'11: VGA memory size = 8MB * 2^((3+1) & 0x3) = 8MB 425 * 426 * mcr04[3:2] 427 * 2b'00: VGA memory size = 8MB 428 * 2b'01: VGA memory size = 16MB 429 * 2b'10: VGA memory size = 32MB 430 * 2b'11: VGA memory size = 64MB 431 */ 432 static size_t ast2600_sdrammc_get_vga_mem_size(struct dram_info *info) 433 { 434 u32 vga_hwconf; 435 size_t vga_mem_size_base = 8 * 1024 * 1024; 436 437 vga_hwconf = 438 (readl(info->scu + AST_SCU_HW_STRAP) & SCU_HWSTRAP_VGAMEM_MASK) >> 439 SCU_HWSTRAP_VGAMEM_SHIFT; 440 441 vga_hwconf = (vga_hwconf + 1) & 0x3; 442 443 clrsetbits_le32(&info->regs->config, SDRAM_CONF_VGA_SIZE_MASK, 444 ((vga_hwconf << SDRAM_CONF_VGA_SIZE_SHIFT) & 445 SDRAM_CONF_VGA_SIZE_MASK)); 446 447 return vga_mem_size_base << vga_hwconf; 448 } 449 #ifdef CONFIG_FPGA_ASPEED 450 static void ast2600_sdrammc_fpga_set_pll(struct dram_info *info) 451 { 452 u32 data; 453 u32 scu_base = (u32)info->scu; 454 455 writel(0x00000303, scu_base + AST_SCU_FPGA_PLL); 456 457 do { 458 data = readl(scu_base + AST_SCU_FPGA_STATUS); 459 } while (!(data & 0x100)); 460 461 writel(0x00000103, scu_base + AST_SCU_FPGA_PLL); 462 } 463 464 static int ast2600_sdrammc_search_read_window(struct dram_info *info) 465 { 466 u32 pll, pll_min, pll_max, dat1, offset; 467 u32 win = 0x03, gwin = 0, gwinsize = 0; 468 u32 phy_setting = (u32)info->phy_setting; 469 470 writel(SEARCH_RDWIN_PTRN_0, SEARCH_RDWIN_ANCHOR_0); 471 writel(SEARCH_RDWIN_PTRN_1, SEARCH_RDWIN_ANCHOR_1); 472 473 while (gwin == 0) { 474 while (!(win & 0x80)) { 475 debug("Window = 0x%X\n", win); 476 writel(win, phy_setting + 0x0000); 477 478 dat1 = readl(SEARCH_RDWIN_ANCHOR_0); 479 dat1 += readl(SEARCH_RDWIN_ANCHOR_1); 480 while (dat1 == SEARCH_RDWIN_PTRN_SUM) { 481 ast2600_sdrammc_fpga_set_pll(info); 482 dat1 = readl(SEARCH_RDWIN_ANCHOR_0); 483 dat1 += readl(SEARCH_RDWIN_ANCHOR_1); 484 } 485 486 pll_min = 0xfff; 487 pll_max = 0x0; 488 pll = 0; 489 while (pll_max > 0 || pll < 256) { 490 ast2600_sdrammc_fpga_set_pll(info); 491 dat1 = readl(SEARCH_RDWIN_ANCHOR_0); 492 dat1 += readl(SEARCH_RDWIN_ANCHOR_1); 493 if (dat1 == SEARCH_RDWIN_PTRN_SUM) { 494 if (pll_min > pll) { 495 pll_min = pll; 496 } 497 if (pll_max < pll) { 498 pll_max = pll; 499 } 500 debug("%3d_(%3d:%3d)\n", pll, pll_min, 501 pll_max); 502 } else if (pll_max > 0) { 503 pll_min = pll_max - pll_min; 504 if (gwinsize < pll_min) { 505 gwin = win; 506 gwinsize = pll_min; 507 } 508 break; 509 } 510 pll += 1; 511 } 512 513 if (gwin != 0 && pll_max == 0) { 514 break; 515 } 516 win = win << 1; 517 } 518 if (gwin == 0) { 519 win = 0x7; 520 } 521 } 522 debug("Set PLL Read Gating Window = %x\n", gwin); 523 writel(gwin, phy_setting + 0x0000); 524 525 debug("PLL Read Window training\n"); 526 pll_min = 0xfff; 527 pll_max = 0x0; 528 529 debug("Search Window Start\n"); 530 dat1 = readl(SEARCH_RDWIN_ANCHOR_0); 531 dat1 += readl(SEARCH_RDWIN_ANCHOR_1); 532 while (dat1 == SEARCH_RDWIN_PTRN_SUM) { 533 ast2600_sdrammc_fpga_set_pll(info); 534 dat1 = readl(SEARCH_RDWIN_ANCHOR_0); 535 dat1 += readl(SEARCH_RDWIN_ANCHOR_1); 536 } 537 538 debug("Search Window Margin\n"); 539 pll = 0; 540 while (pll_max > 0 || pll < 256) { 541 ast2600_sdrammc_fpga_set_pll(info); 542 dat1 = readl(SEARCH_RDWIN_ANCHOR_0); 543 dat1 += readl(SEARCH_RDWIN_ANCHOR_1); 544 if (dat1 == SEARCH_RDWIN_PTRN_SUM) { 545 if (pll_min > pll) { 546 pll_min = pll; 547 } 548 if (pll_max < pll) { 549 pll_max = pll; 550 } 551 debug("%3d_(%3d:%3d)\n", pll, pll_min, pll_max); 552 } else if (pll_max > 0 && (pll_max - pll_min) > 20) { 553 break; 554 } else if (pll_max > 0) { 555 pll_min = 0xfff; 556 pll_max = 0x0; 557 } 558 pll += 1; 559 } 560 if (pll_min < pll_max) { 561 debug("PLL Read window = %d\n", (pll_max - pll_min)); 562 offset = (pll_max - pll_min) >> 1; 563 pll_min = 0xfff; 564 pll = 0; 565 while (pll < (pll_min + offset)) { 566 ast2600_sdrammc_fpga_set_pll(info); 567 dat1 = readl(SEARCH_RDWIN_ANCHOR_0); 568 dat1 += readl(SEARCH_RDWIN_ANCHOR_1); 569 if (dat1 == SEARCH_RDWIN_PTRN_SUM) { 570 if (pll_min > pll) { 571 pll_min = pll; 572 } 573 debug("%d\n", pll); 574 } else { 575 pll_min = 0xfff; 576 pll_max = 0x0; 577 } 578 pll += 1; 579 } 580 return (1); 581 } else { 582 debug("PLL Read window training fail\n"); 583 return (0); 584 } 585 } 586 #endif /* end of "#ifdef CONFIG_FPGA_ASPEED" */ 587 588 /* 589 * Find out RAM size and save it in dram_info 590 * 591 * The procedure is taken from Aspeed SDK 592 */ 593 static void ast2600_sdrammc_calc_size(struct dram_info *info) 594 { 595 /* The controller supports 256/512/1024/2048 MB ram */ 596 size_t ram_size = SDRAM_MIN_SIZE; 597 const int write_test_offset = 0x100000; 598 u32 test_pattern = 0xdeadbeef; 599 u32 cap_param = SDRAM_CONF_CAP_2048M; 600 u32 refresh_timing_param = DDR4_TRFC; 601 const u32 write_addr_base = CONFIG_SYS_SDRAM_BASE + write_test_offset; 602 603 for (ram_size = SDRAM_MAX_SIZE; ram_size > SDRAM_MIN_SIZE; 604 ram_size >>= 1) { 605 writel(test_pattern, write_addr_base + (ram_size >> 1)); 606 test_pattern = (test_pattern >> 4) | (test_pattern << 28); 607 } 608 609 /* One last write to overwrite all wrapped values */ 610 writel(test_pattern, write_addr_base); 611 612 /* Reset the pattern and see which value was really written */ 613 test_pattern = 0xdeadbeef; 614 for (ram_size = SDRAM_MAX_SIZE; ram_size > SDRAM_MIN_SIZE; 615 ram_size >>= 1) { 616 if (readl(write_addr_base + (ram_size >> 1)) == test_pattern) 617 break; 618 619 --cap_param; 620 refresh_timing_param >>= 8; 621 test_pattern = (test_pattern >> 4) | (test_pattern << 28); 622 } 623 624 clrsetbits_le32(&info->regs->ac_timing[1], 625 (SDRAM_AC_TRFC_MASK << SDRAM_AC_TRFC_SHIFT), 626 ((refresh_timing_param & SDRAM_AC_TRFC_MASK) 627 << SDRAM_AC_TRFC_SHIFT)); 628 629 info->info.base = CONFIG_SYS_SDRAM_BASE; 630 info->info.size = ram_size - ast2600_sdrammc_get_vga_mem_size(info); 631 632 clrsetbits_le32( 633 &info->regs->config, SDRAM_CONF_CAP_MASK, 634 ((cap_param << SDRAM_CONF_CAP_SHIFT) & SDRAM_CONF_CAP_MASK)); 635 } 636 637 static int ast2600_sdrammc_init_ddr4(struct dram_info *info) 638 { 639 const u32 power_ctrl = MCR34_CKE_EN | MCR34_AUTOPWRDN_EN | 640 MCR34_MREQ_BYPASS_DIS | MCR34_RESETN_DIS | 641 MCR34_ODT_EN | MCR34_ODT_AUTO_ON | 642 (0x1 << MCR34_ODT_EXT_SHIFT); 643 644 /* init SDRAM-PHY only on real chip */ 645 ast2600_sdramphy_init(ast2600_sdramphy_config, info); 646 writel((MCR34_CKE_EN | MCR34_MREQI_DIS | MCR34_RESETN_DIS), 647 &info->regs->power_ctrl); 648 udelay(5); 649 ast2600_sdramphy_kick_training(info); 650 udelay(500); 651 writel(SDRAM_RESET_DLL_ZQCL_EN, &info->regs->refresh_timing); 652 653 writel(MCR30_SET_MR(3), &info->regs->mode_setting_control); 654 writel(MCR30_SET_MR(6), &info->regs->mode_setting_control); 655 writel(MCR30_SET_MR(5), &info->regs->mode_setting_control); 656 writel(MCR30_SET_MR(4), &info->regs->mode_setting_control); 657 writel(MCR30_SET_MR(2), &info->regs->mode_setting_control); 658 writel(MCR30_SET_MR(1), &info->regs->mode_setting_control); 659 writel(MCR30_SET_MR(0) | MCR30_RESET_DLL_DELAY_EN, 660 &info->regs->mode_setting_control); 661 662 #ifdef CONFIG_FPGA_ASPEED 663 writel(SDRAM_REFRESH_EN | SDRAM_RESET_DLL_ZQCL_EN | 664 (0x5d << SDRAM_REFRESH_PERIOD_SHIFT), 665 &info->regs->refresh_timing); 666 #else 667 writel(SDRAM_REFRESH_EN | SDRAM_RESET_DLL_ZQCL_EN | 668 (0x5f << SDRAM_REFRESH_PERIOD_SHIFT), 669 &info->regs->refresh_timing); 670 #endif 671 672 /* wait self-refresh idle */ 673 while (readl(&info->regs->power_ctrl) & MCR34_SELF_REFRESH_STATUS_MASK) 674 ; 675 676 #ifdef CONFIG_FPGA_ASPEED 677 writel(SDRAM_REFRESH_EN | SDRAM_LOW_PRI_REFRESH_EN | 678 SDRAM_REFRESH_ZQCS_EN | 679 (0x5d << SDRAM_REFRESH_PERIOD_SHIFT) | 680 (0x4000 << SDRAM_REFRESH_PERIOD_ZQCS_SHIFT), 681 &info->regs->refresh_timing); 682 #else 683 writel(SDRAM_REFRESH_EN | SDRAM_LOW_PRI_REFRESH_EN | 684 SDRAM_REFRESH_ZQCS_EN | 685 (0x5f << SDRAM_REFRESH_PERIOD_SHIFT) | 686 (0x42aa << SDRAM_REFRESH_PERIOD_ZQCS_SHIFT), 687 &info->regs->refresh_timing); 688 #endif 689 690 writel(power_ctrl, &info->regs->power_ctrl); 691 udelay(500); 692 693 #ifdef CONFIG_FPGA_ASPEED 694 /* toggle Vref training */ 695 setbits_le32(&info->regs->mr6_mode_setting, 0x80); 696 writel(MCR30_RESET_DLL_DELAY_EN | MCR30_SET_MR(6), 697 &info->regs->mode_setting_control); 698 clrbits_le32(&info->regs->mr6_mode_setting, 0x80); 699 writel(MCR30_RESET_DLL_DELAY_EN | MCR30_SET_MR(6), 700 &info->regs->mode_setting_control); 701 #endif 702 return 0; 703 } 704 705 static void ast2600_sdrammc_unlock(struct dram_info *info) 706 { 707 writel(SDRAM_UNLOCK_KEY, &info->regs->protection_key); 708 while (!readl(&info->regs->protection_key)) 709 ; 710 } 711 712 static void ast2600_sdrammc_lock(struct dram_info *info) 713 { 714 writel(~SDRAM_UNLOCK_KEY, &info->regs->protection_key); 715 while (readl(&info->regs->protection_key)) 716 ; 717 } 718 719 static void ast2600_sdrammc_common_init(struct ast2600_sdrammc_regs *regs) 720 { 721 int i; 722 723 writel(MCR34_MREQI_DIS | MCR34_RESETN_DIS, ®s->power_ctrl); 724 writel(SDRAM_VIDEO_UNLOCK_KEY, ®s->gm_protection_key); 725 writel(0x10 << MCR38_RW_MAX_GRANT_CNT_RQ_SHIFT, 726 ®s->arbitration_ctrl); 727 writel(0xFFBBFFF4, ®s->req_limit_mask); 728 729 for (i = 0; i < ARRAY_SIZE(ddr_max_grant_params); ++i) 730 writel(ddr_max_grant_params[i], ®s->max_grant_len[i]); 731 732 writel(MCR50_RESET_ALL_INTR, ®s->intr_ctrl); 733 734 /* FIXME: the sample code does NOT match the datasheet */ 735 writel(0x07FFFFFF, ®s->ecc_range_ctrl); 736 737 writel(0, ®s->ecc_test_ctrl); 738 writel(0, ®s->test_addr); 739 writel(0, ®s->test_fail_dq_bit); 740 writel(0, ®s->test_init_val); 741 742 writel(0xFFFFFFFF, ®s->req_input_ctrl); 743 writel(0, ®s->req_high_pri_ctrl); 744 745 udelay(600); 746 747 #ifdef CONFIG_ASPEED_DDR4_DUALX8 748 writel(0x37, ®s->config); 749 #else 750 writel(0x17, ®s->config); 751 #endif 752 753 /* load controller setting */ 754 for (i = 0; i < ARRAY_SIZE(ddr4_ac_timing); ++i) 755 writel(ddr4_ac_timing[i], ®s->ac_timing[i]); 756 757 writel(DDR4_MR01_MODE, ®s->mr01_mode_setting); 758 writel(DDR4_MR23_MODE, ®s->mr23_mode_setting); 759 writel(DDR4_MR45_MODE, ®s->mr45_mode_setting); 760 writel(DDR4_MR6_MODE, ®s->mr6_mode_setting); 761 } 762 763 static int ast2600_sdrammc_probe(struct udevice *dev) 764 { 765 struct dram_info *priv = (struct dram_info *)dev_get_priv(dev); 766 struct ast2600_sdrammc_regs *regs = priv->regs; 767 struct udevice *clk_dev; 768 int ret; 769 uint32_t reg; 770 771 /* find SCU base address from clock device */ 772 ret = uclass_get_device_by_driver(UCLASS_CLK, DM_GET_DRIVER(aspeed_scu), 773 &clk_dev); 774 if (ret) { 775 debug("clock device not defined\n"); 776 return ret; 777 } 778 779 priv->scu = devfdt_get_addr_ptr(clk_dev); 780 if (IS_ERR(priv->scu)) { 781 debug("%s(): can't get SCU\n", __func__); 782 return PTR_ERR(priv->scu); 783 } 784 785 if (readl(priv->scu + AST_SCU_HANDSHAKE) & SCU_SDRAM_INIT_READY_MASK) { 786 debug("%s(): DDR SDRAM had been initialized\n", __func__); 787 ast2600_sdrammc_calc_size(priv); 788 return 0; 789 } 790 791 #ifdef AST2600_SDRAMMC_MANUAL_CLK 792 reg = readl(priv->scu + AST_SCU_MPLL); 793 reg &= ~(BIT(24) | GENMASK(22, 0)); 794 reg |= (BIT(25) | BIT(23) | SCU_MPLL_FREQ_CFG); 795 writel(reg, priv->scu + AST_SCU_MPLL); 796 writel(SCU_MPLL_EXT_CFG, priv->scu + AST_SCU_MPLL_EXT); 797 udelay(100); 798 reg &= ~(BIT(25) | BIT(23)); 799 writel(reg, priv->scu + AST_SCU_MPLL); 800 while(0 == (readl(priv->scu + AST_SCU_MPLL_EXT) & BIT(31))); 801 #else 802 ret = clk_get_by_index(dev, 0, &priv->ddr_clk); 803 if (ret) { 804 debug("DDR:No CLK\n"); 805 return ret; 806 } 807 clk_set_rate(&priv->ddr_clk, priv->clock_rate); 808 #endif 809 810 #if 0 811 /* FIXME: enable the following code if reset-driver is ready */ 812 struct reset_ctl reset_ctl; 813 ret = reset_get_by_index(dev, 0, &reset_ctl); 814 if (ret) { 815 debug("%s(): Failed to get reset signal\n", __func__); 816 return ret; 817 } 818 819 ret = reset_assert(&reset_ctl); 820 if (ret) { 821 debug("%s(): SDRAM reset failed: %u\n", __func__, ret); 822 return ret; 823 } 824 #endif 825 826 ast2600_sdrammc_unlock(priv); 827 ast2600_sdrammc_common_init(regs); 828 829 if (readl(priv->scu + AST_SCU_HW_STRAP) & SCU_HWSTRAP_DDR3) { 830 debug("Unsupported SDRAM type: DDR3\n"); 831 return -EINVAL; 832 } else { 833 ast2600_sdrammc_init_ddr4(priv); 834 } 835 836 #ifdef CONFIG_FPGA_ASPEED 837 ast2600_sdrammc_search_read_window(priv); 838 #endif 839 840 #ifndef DEBUG 841 mdelay(10); 842 #endif 843 ast2600_sdramphy_show_status(priv); 844 ast2600_sdrammc_calc_size(priv); 845 846 if (0 != ast2600_sdrammc_test(priv)) { 847 printf("%s: DDR4 init fail\n", __func__); 848 return -EINVAL; 849 } 850 851 writel(readl(priv->scu + AST_SCU_HANDSHAKE) | SCU_SDRAM_INIT_READY_MASK, 852 priv->scu + AST_SCU_HANDSHAKE); 853 854 clrbits_le32(®s->intr_ctrl, MCR50_RESET_ALL_INTR); 855 ast2600_sdrammc_lock(priv); 856 return 0; 857 } 858 859 static int ast2600_sdrammc_ofdata_to_platdata(struct udevice *dev) 860 { 861 struct dram_info *priv = dev_get_priv(dev); 862 863 priv->regs = (void *)(uintptr_t)devfdt_get_addr_index(dev, 0); 864 priv->phy_setting = (void *)(uintptr_t)devfdt_get_addr_index(dev, 1); 865 priv->phy_status = (void *)(uintptr_t)devfdt_get_addr_index(dev, 2); 866 867 priv->clock_rate = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), 868 "clock-frequency", 0); 869 if (!priv->clock_rate) { 870 debug("DDR Clock Rate not defined\n"); 871 return -EINVAL; 872 } 873 874 return 0; 875 } 876 877 static int ast2600_sdrammc_get_info(struct udevice *dev, struct ram_info *info) 878 { 879 struct dram_info *priv = dev_get_priv(dev); 880 881 *info = priv->info; 882 883 return 0; 884 } 885 886 static struct ram_ops ast2600_sdrammc_ops = { 887 .get_info = ast2600_sdrammc_get_info, 888 }; 889 890 static const struct udevice_id ast2600_sdrammc_ids[] = { 891 { .compatible = "aspeed,ast2600-sdrammc" }, 892 { } 893 }; 894 895 U_BOOT_DRIVER(sdrammc_ast2600) = { 896 .name = "aspeed_ast2600_sdrammc", 897 .id = UCLASS_RAM, 898 .of_match = ast2600_sdrammc_ids, 899 .ops = &ast2600_sdrammc_ops, 900 .ofdata_to_platdata = ast2600_sdrammc_ofdata_to_platdata, 901 .probe = ast2600_sdrammc_probe, 902 .priv_auto_alloc_size = sizeof(struct dram_info), 903 }; 904