1 /* 2 * (C) Copyright 2015 Google, Inc 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 #include <common.h> 7 #include <asm/io.h> 8 #include <asm/types.h> 9 #include <asm/arch/cru_rk3036.h> 10 #include <asm/arch/grf_rk3036.h> 11 #include <asm/arch/hardware.h> 12 #include <asm/arch/sdram_rk3036.h> 13 #include <asm/arch/timer.h> 14 #include <asm/arch/uart.h> 15 16 /* 17 * we can not fit the code to access the device tree in SPL 18 * (due to 4K SRAM size limits), so these are hard-coded 19 */ 20 #define CRU_BASE 0x20000000 21 #define GRF_BASE 0x20008000 22 #define DDR_PHY_BASE 0x2000a000 23 #define DDR_PCTL_BASE 0x20004000 24 #define CPU_AXI_BUS_BASE 0x10128000 25 26 struct rk3036_sdram_priv { 27 struct rk3036_cru *cru; 28 struct rk3036_grf *grf; 29 struct rk3036_ddr_phy *phy; 30 struct rk3036_ddr_pctl *pctl; 31 struct rk3036_service_sys *axi_bus; 32 33 /* ddr die config */ 34 struct rk3036_ddr_config ddr_config; 35 }; 36 37 /* use integer mode, 396MHz dpll setting 38 * refdiv, fbdiv, postdiv1, postdiv2 39 */ 40 const struct pll_div dpll_init_cfg = {1, 66, 4, 1}; 41 42 /* 396Mhz ddr timing */ 43 const struct rk3036_ddr_timing ddr_timing = {0x18c, 44 {0x18c, 0xc8, 0x1f4, 0x27, 0x4e, 45 0x4, 0x8b, 0x06, 0x03, 0x0, 0x06, 0x05, 0x0f, 0x15, 0x06, 0x04, 0x04, 46 0x06, 0x04, 0x200, 0x03, 0x0a, 0x40, 0x2710, 0x01, 0x05, 0x05, 0x03, 47 0x0c, 0x28, 0x100, 0x0, 0x04, 0x0}, 48 {{0x420, 0x42, 0x0, 0x0}, 0x01, 0x60}, 49 {0x24717315} }; 50 51 /* 52 * [7:6] bank(n:n bit bank) 53 * [5:4] row(13+n) 54 * [3] cs(0:1 cs, 1:2 cs) 55 * [2:1] bank(n:n bit bank) 56 * [0] col(10+n) 57 */ 58 const char ddr_cfg_2_rbc[] = { 59 ((3 << 6) | (3 << 4) | (0 << 3) | (0 << 1) | 1), 60 ((0 << 6) | (1 << 4) | (0 << 3) | (3 << 1) | 0), 61 ((0 << 6) | (2 << 4) | (0 << 3) | (3 << 1) | 0), 62 ((0 << 6) | (3 << 4) | (0 << 3) | (3 << 1) | 0), 63 ((0 << 6) | (1 << 4) | (0 << 3) | (3 << 1) | 1), 64 ((0 << 6) | (2 << 4) | (0 << 3) | (3 << 1) | 1), 65 ((0 << 6) | (3 << 4) | (0 << 3) | (3 << 1) | 1), 66 ((0 << 6) | (0 << 4) | (0 << 3) | (3 << 1) | 0), 67 ((0 << 6) | (0 << 4) | (0 << 3) | (3 << 1) | 1), 68 ((0 << 6) | (3 << 4) | (1 << 3) | (3 << 1) | 0), 69 ((0 << 6) | (3 << 4) | (1 << 3) | (3 << 1) | 1), 70 ((1 << 6) | (2 << 4) | (0 << 3) | (2 << 1) | 0), 71 ((3 << 6) | (2 << 4) | (0 << 3) | (0 << 1) | 1), 72 ((3 << 6) | (3 << 4) | (0 << 3) | (0 << 1) | 0), 73 }; 74 75 /* DDRPHY REG */ 76 enum { 77 /* DDRPHY_REG1 */ 78 SOFT_RESET_MASK = 3, 79 SOFT_RESET_SHIFT = 2, 80 81 /* DDRPHY_REG2 */ 82 MEMORY_SELECT_DDR3 = 0 << 6, 83 DQS_SQU_CAL_NORMAL_MODE = 0 << 1, 84 DQS_SQU_CAL_START = 1 << 0, 85 DQS_SQU_NO_CAL = 0 << 0, 86 87 /* DDRPHY_REG2A */ 88 CMD_DLL_BYPASS = 1 << 4, 89 CMD_DLL_BYPASS_DISABLE = 0 << 4, 90 HIGH_8BIT_DLL_BYPASS = 1 << 3, 91 HIGH_8BIT_DLL_BYPASS_DISABLE = 0 << 3, 92 LOW_8BIT_DLL_BYPASS = 1 << 2, 93 LOW_8BIT_DLL_BYPASS_DISABLE = 0 << 2, 94 95 /* DDRPHY_REG19 */ 96 CMD_FEEDBACK_ENABLE = 1 << 5, 97 CMD_SLAVE_DLL_INVERSE_MODE = 1 << 4, 98 CMD_SLAVE_DLL_NO_INVERSE_MODE = 0 << 4, 99 CMD_SLAVE_DLL_ENALBE = 1 << 3, 100 CMD_TX_SLAVE_DLL_DELAY_MASK = 7, 101 CMD_TX_SLAVE_DLL_DELAY_SHIFT = 0, 102 103 /* DDRPHY_REG6 */ 104 LEFT_CHN_TX_DQ_PHASE_BYPASS_90 = 1 << 4, 105 LEFT_CHN_TX_DQ_PHASE_BYPASS_0 = 0 << 4, 106 LEFT_CHN_TX_DQ_DLL_ENABLE = 1 << 3, 107 LEFT_CHN_TX_DQ_DLL_DELAY_MASK = 7, 108 LEFT_CHN_TX_DQ_DLL_DELAY_SHIFT = 0, 109 110 /* DDRPHY_REG8 */ 111 LEFT_CHN_RX_DQS_DELAY_TAP_MASK = 3, 112 LEFT_CHN_RX_DQS_DELAY_TAP_SHIFT = 0, 113 114 /* DDRPHY_REG9 */ 115 RIGHT_CHN_TX_DQ_PHASE_BYPASS_90 = 1 << 4, 116 RIGHT_CHN_TX_DQ_PHASE_BYPASS_0 = 0 << 4, 117 RIGHT_CHN_TX_DQ_DLL_ENABLE = 1 << 3, 118 RIGHT_CHN_TX_DQ_DLL_DELAY_MASK = 7, 119 RIGHT_CHN_TX_DQ_DLL_DELAY_SHIFT = 0, 120 121 /* DDRPHY_REG11 */ 122 RIGHT_CHN_RX_DQS_DELAY_TAP_MASK = 3, 123 RIGHT_CHN_RX_DQS_DELAY_TAP_SHIFT = 0, 124 125 /* DDRPHY_REG62 */ 126 CAL_DONE_MASK = 3, 127 HIGH_8BIT_CAL_DONE = 1 << 1, 128 LOW_8BIT_CAL_DONE = 1 << 0, 129 }; 130 131 /* PTCL */ 132 enum { 133 /* PCTL_DFISTCFG0 */ 134 DFI_INIT_START = 1 << 0, 135 DFI_DATA_BYTE_DISABLE_EN = 1 << 2, 136 137 /* PCTL_DFISTCFG1 */ 138 DFI_DRAM_CLK_SR_EN = 1 << 0, 139 DFI_DRAM_CLK_DPD_EN = 1 << 1, 140 141 /* PCTL_DFISTCFG2 */ 142 DFI_PARITY_INTR_EN = 1 << 0, 143 DFI_PARITY_EN = 1 << 1, 144 145 /* PCTL_DFILPCFG0 */ 146 TLP_RESP_TIME_SHIFT = 16, 147 LP_SR_EN = 1 << 8, 148 LP_PD_EN = 1 << 0, 149 150 /* PCTL_DFIODTCFG */ 151 RANK0_ODT_WRITE_SEL = 1 << 3, 152 RANK1_ODT_WRITE_SEL = 1 << 11, 153 154 /* PCTL_DFIODTCFG1 */ 155 ODT_LEN_BL8_W_SHIFT = 16, 156 157 /* PCTL_MCFG */ 158 TFAW_CFG_MASK = 3, 159 TFAW_CFG_SHIFT = 18, 160 PD_EXIT_SLOW_MODE = 0 << 17, 161 PD_ACTIVE_POWER_DOWN = 1 << 16, 162 PD_IDLE_MASK = 0xff, 163 PD_IDLE_SHIFT = 8, 164 MEM_BL4 = 0 << 0, 165 MEM_BL8 = 1 << 0, 166 167 /* PCTL_MCFG1 */ 168 HW_EXIT_IDLE_EN_MASK = 1, 169 HW_EXIT_IDLE_EN_SHIFT = 31, 170 SR_IDLE_MASK = 0x1ff, 171 SR_IDLE_SHIFT = 0, 172 173 /* PCTL_SCFG */ 174 HW_LOW_POWER_EN = 1 << 0, 175 176 /* PCTL_POWCTL */ 177 POWER_UP_START = 1 << 0, 178 179 /* PCTL_POWSTAT */ 180 POWER_UP_DONE = 1 << 0, 181 182 /* PCTL_MCMD */ 183 START_CMD = 1 << 31, 184 BANK_ADDR_MASK = 7, 185 BANK_ADDR_SHIFT = 17, 186 CMD_ADDR_MASK = 0x1fff, 187 CMD_ADDR_SHIFT = 4, 188 DESELECT_CMD = 0, 189 PREA_CMD, 190 REF_CMD, 191 MRS_CMD, 192 ZQCS_CMD, 193 ZQCL_CMD, 194 RSTL_CMD, 195 MRR_CMD = 8, 196 197 /* PCTL_STAT */ 198 INIT_MEM = 0, 199 CONFIG, 200 CONFIG_REQ, 201 ACCESS, 202 ACCESS_REQ, 203 LOW_POWER, 204 LOW_POWER_ENTRY_REQ, 205 LOW_POWER_EXIT_REQ, 206 PCTL_STAT_MASK = 7, 207 208 /* PCTL_SCTL */ 209 INIT_STATE = 0, 210 CFG_STATE = 1, 211 GO_STATE = 2, 212 SLEEP_STATE = 3, 213 WAKEUP_STATE = 4, 214 }; 215 216 /* GRF_SOC_CON2 */ 217 #define MSCH4_MAINDDR3 (1 << 7) 218 #define PHY_DRV_ODT_SET(n) ((n << 4) | n) 219 #define DDR3_DLL_RESET (1 << 8) 220 221 /* CK pull up/down driver strength control */ 222 enum { 223 PHY_RON_DISABLE = 0, 224 PHY_RON_309OHM = 1, 225 PHY_RON_155OHM, 226 PHY_RON_103OHM = 3, 227 PHY_RON_63OHM = 5, 228 PHY_RON_45OHM = 7, 229 PHY_RON_77OHM, 230 PHY_RON_62OHM, 231 PHY_RON_52OHM, 232 PHY_RON_44OHM, 233 PHY_RON_39OHM, 234 PHY_RON_34OHM, 235 PHY_RON_31OHM, 236 PHY_RON_28OHM, 237 }; 238 239 /* DQ pull up/down control */ 240 enum { 241 PHY_RTT_DISABLE = 0, 242 PHY_RTT_861OHM = 1, 243 PHY_RTT_431OHM, 244 PHY_RTT_287OHM, 245 PHY_RTT_216OHM, 246 PHY_RTT_172OHM, 247 PHY_RTT_145OHM, 248 PHY_RTT_124OHM, 249 PHY_RTT_215OHM, 250 PHY_RTT_144OHM = 0xa, 251 PHY_RTT_123OHM, 252 PHY_RTT_108OHM, 253 PHY_RTT_96OHM, 254 PHY_RTT_86OHM, 255 PHY_RTT_78OHM, 256 }; 257 258 /* DQS squelch DLL delay */ 259 enum { 260 DQS_DLL_NO_DELAY = 0, 261 DQS_DLL_22P5_DELAY, 262 DQS_DLL_45_DELAY, 263 DQS_DLL_67P5_DELAY, 264 DQS_DLL_90_DELAY, 265 DQS_DLL_112P5_DELAY, 266 DQS_DLL_135_DELAY, 267 DQS_DLL_157P5_DELAY, 268 }; 269 270 /* GRF_OS_REG1 */ 271 enum { 272 /* 273 * 000: lpddr 274 * 001: ddr 275 * 010: ddr2 276 * 011: ddr3 277 * 100: lpddr2-s2 278 * 101: lpddr2-s4 279 * 110: lpddr3 280 */ 281 DDR_TYPE_MASK = 7, 282 DDR_TYPE_SHIFT = 13, 283 284 /* 0: 1 chn, 1: 2 chn */ 285 DDR_CHN_CNT_SHIFT = 12, 286 287 /* 0: 1 rank, 1: 2 rank */ 288 DDR_RANK_CNT_MASK = 1, 289 DDR_RANK_CNT_SHIFT = 11, 290 291 /* 292 * 00: 9col 293 * 01: 10col 294 * 10: 11col 295 * 11: 12col 296 */ 297 DDR_COL_MASK = 3, 298 DDR_COL_SHIFT = 9, 299 300 /* 0: 8 bank, 1: 4 bank*/ 301 DDR_BANK_MASK = 1, 302 DDR_BANK_SHIFT = 8, 303 304 /* 305 * 00: 13 row 306 * 01: 14 row 307 * 10: 15 row 308 * 11: 16 row 309 */ 310 DDR_CS0_ROW_MASK = 3, 311 DDR_CS0_ROW_SHIFT = 6, 312 DDR_CS1_ROW_MASK = 3, 313 DDR_CS1_ROW_SHIFT = 4, 314 315 /* 316 * 00: 32 bit 317 * 01: 16 bit 318 * 10: 8 bit 319 * rk3036 only support 16bit 320 */ 321 DDR_BW_MASK = 3, 322 DDR_BW_SHIFT = 2, 323 DDR_DIE_BW_MASK = 3, 324 DDR_DIE_BW_SHIFT = 0, 325 }; 326 327 static void rkdclk_init(struct rk3036_sdram_priv *priv) 328 { 329 struct rk3036_pll *pll = &priv->cru->pll[1]; 330 331 /* pll enter slow-mode */ 332 rk_clrsetreg(&priv->cru->cru_mode_con, 333 DPLL_MODE_MASK << DPLL_MODE_SHIFT, 334 DPLL_MODE_SLOW << DPLL_MODE_SHIFT); 335 336 /* use integer mode */ 337 rk_clrreg(&pll->con1, 1 << PLL_DSMPD_SHIFT); 338 339 rk_clrsetreg(&pll->con0, 340 PLL_POSTDIV1_MASK << PLL_POSTDIV1_SHIFT | PLL_FBDIV_MASK, 341 (dpll_init_cfg.postdiv1 << PLL_POSTDIV1_SHIFT) | 342 dpll_init_cfg.fbdiv); 343 rk_clrsetreg(&pll->con1, PLL_POSTDIV2_MASK << PLL_POSTDIV2_SHIFT | 344 PLL_REFDIV_MASK << PLL_REFDIV_SHIFT, 345 (dpll_init_cfg.postdiv2 << PLL_POSTDIV2_SHIFT | 346 dpll_init_cfg.refdiv << PLL_REFDIV_SHIFT)); 347 348 /* waiting for pll lock */ 349 while (readl(&pll->con1) & (1 << PLL_LOCK_STATUS_SHIFT)) 350 rockchip_udelay(1); 351 352 /* PLL enter normal-mode */ 353 rk_clrsetreg(&priv->cru->cru_mode_con, 354 DPLL_MODE_MASK << DPLL_MODE_SHIFT, 355 DPLL_MODE_NORM << DPLL_MODE_SHIFT); 356 } 357 358 static void copy_to_reg(u32 *dest, const u32 *src, u32 n) 359 { 360 int i; 361 362 for (i = 0; i < n / sizeof(u32); i++) { 363 writel(*src, dest); 364 src++; 365 dest++; 366 } 367 } 368 369 void phy_pctrl_reset(struct rk3036_sdram_priv *priv) 370 { 371 struct rk3036_ddr_phy *ddr_phy = priv->phy; 372 373 rk_clrsetreg(&priv->cru->cru_softrst_con[5], 1 << DDRCTRL_PSRST_SHIFT | 374 1 << DDRCTRL_SRST_SHIFT | 1 << DDRPHY_PSRST_SHIFT | 375 1 << DDRPHY_SRST_SHIFT, 376 1 << DDRCTRL_PSRST_SHIFT | 1 << DDRCTRL_SRST_SHIFT | 377 1 << DDRPHY_PSRST_SHIFT | 1 << DDRPHY_SRST_SHIFT); 378 379 rockchip_udelay(10); 380 381 rk_clrreg(&priv->cru->cru_softrst_con[5], 1 << DDRPHY_PSRST_SHIFT | 382 1 << DDRPHY_SRST_SHIFT); 383 rockchip_udelay(10); 384 385 rk_clrreg(&priv->cru->cru_softrst_con[5], 1 << DDRCTRL_PSRST_SHIFT | 386 1 << DDRCTRL_SRST_SHIFT); 387 rockchip_udelay(10); 388 389 clrsetbits_le32(&ddr_phy->ddrphy_reg1, 390 SOFT_RESET_MASK << SOFT_RESET_SHIFT, 391 0 << SOFT_RESET_SHIFT); 392 rockchip_udelay(10); 393 clrsetbits_le32(&ddr_phy->ddrphy_reg1, 394 SOFT_RESET_MASK << SOFT_RESET_SHIFT, 395 3 << SOFT_RESET_SHIFT); 396 397 rockchip_udelay(1); 398 } 399 400 void phy_dll_bypass_set(struct rk3036_sdram_priv *priv, unsigned int freq) 401 { 402 struct rk3036_ddr_phy *ddr_phy = priv->phy; 403 404 if (freq < ddr_timing.freq) { 405 writel(CMD_DLL_BYPASS | HIGH_8BIT_DLL_BYPASS | 406 LOW_8BIT_DLL_BYPASS, &ddr_phy->ddrphy_reg2a); 407 408 writel(LEFT_CHN_TX_DQ_PHASE_BYPASS_90 | 409 LEFT_CHN_TX_DQ_DLL_ENABLE | 410 (0 & LEFT_CHN_TX_DQ_DLL_DELAY_MASK) << 411 LEFT_CHN_TX_DQ_DLL_DELAY_SHIFT, &ddr_phy->ddrphy_reg6); 412 413 writel(RIGHT_CHN_TX_DQ_PHASE_BYPASS_90 | 414 RIGHT_CHN_TX_DQ_DLL_ENABLE | 415 (0 & RIGHT_CHN_TX_DQ_DLL_DELAY_MASK) << 416 RIGHT_CHN_TX_DQ_DLL_DELAY_SHIFT, 417 &ddr_phy->ddrphy_reg9); 418 } else { 419 writel(CMD_DLL_BYPASS_DISABLE | HIGH_8BIT_DLL_BYPASS_DISABLE | 420 LOW_8BIT_DLL_BYPASS_DISABLE, &ddr_phy->ddrphy_reg2a); 421 422 writel(LEFT_CHN_TX_DQ_PHASE_BYPASS_0 | 423 LEFT_CHN_TX_DQ_DLL_ENABLE | 424 (4 & LEFT_CHN_TX_DQ_DLL_DELAY_MASK) << 425 LEFT_CHN_TX_DQ_DLL_DELAY_SHIFT, 426 &ddr_phy->ddrphy_reg6); 427 428 writel(RIGHT_CHN_TX_DQ_PHASE_BYPASS_0 | 429 RIGHT_CHN_TX_DQ_DLL_ENABLE | 430 (4 & RIGHT_CHN_TX_DQ_DLL_DELAY_MASK) << 431 RIGHT_CHN_TX_DQ_DLL_DELAY_SHIFT, 432 &ddr_phy->ddrphy_reg9); 433 } 434 435 writel(CMD_SLAVE_DLL_NO_INVERSE_MODE | CMD_SLAVE_DLL_ENALBE | 436 (0 & CMD_TX_SLAVE_DLL_DELAY_MASK) << 437 CMD_TX_SLAVE_DLL_DELAY_SHIFT, &ddr_phy->ddrphy_reg19); 438 439 /* 45 degree delay */ 440 writel((DQS_DLL_45_DELAY & LEFT_CHN_RX_DQS_DELAY_TAP_MASK) << 441 LEFT_CHN_RX_DQS_DELAY_TAP_SHIFT, &ddr_phy->ddrphy_reg8); 442 writel((DQS_DLL_45_DELAY & RIGHT_CHN_RX_DQS_DELAY_TAP_MASK) << 443 RIGHT_CHN_RX_DQS_DELAY_TAP_SHIFT, &ddr_phy->ddrphy_reg11); 444 } 445 446 static void send_command(struct rk3036_ddr_pctl *pctl, 447 u32 rank, u32 cmd, u32 arg) 448 { 449 writel((START_CMD | (rank << 20) | arg | cmd), &pctl->mcmd); 450 rockchip_udelay(1); 451 while (readl(&pctl->mcmd) & START_CMD) 452 ; 453 } 454 455 static void memory_init(struct rk3036_sdram_priv *priv) 456 { 457 struct rk3036_ddr_pctl *pctl = priv->pctl; 458 459 send_command(pctl, 3, DESELECT_CMD, 0); 460 rockchip_udelay(1); 461 send_command(pctl, 3, PREA_CMD, 0); 462 send_command(pctl, 3, MRS_CMD, 463 (0x02 & BANK_ADDR_MASK) << BANK_ADDR_SHIFT | 464 (ddr_timing.phy_timing.mr[2] & CMD_ADDR_MASK) << 465 CMD_ADDR_SHIFT); 466 467 send_command(pctl, 3, MRS_CMD, 468 (0x03 & BANK_ADDR_MASK) << BANK_ADDR_SHIFT | 469 (ddr_timing.phy_timing.mr[3] & CMD_ADDR_MASK) << 470 CMD_ADDR_SHIFT); 471 472 send_command(pctl, 3, MRS_CMD, 473 (0x01 & BANK_ADDR_MASK) << BANK_ADDR_SHIFT | 474 (ddr_timing.phy_timing.mr[1] & CMD_ADDR_MASK) << 475 CMD_ADDR_SHIFT); 476 477 send_command(pctl, 3, MRS_CMD, 478 (0x00 & BANK_ADDR_MASK) << BANK_ADDR_SHIFT | 479 (ddr_timing.phy_timing.mr[0] & CMD_ADDR_MASK) << 480 CMD_ADDR_SHIFT | DDR3_DLL_RESET); 481 482 send_command(pctl, 3, ZQCL_CMD, 0); 483 } 484 485 static void data_training(struct rk3036_sdram_priv *priv) 486 { 487 struct rk3036_ddr_phy *ddr_phy = priv->phy; 488 struct rk3036_ddr_pctl *pctl = priv->pctl; 489 u32 value; 490 491 /* disable auto refresh */ 492 value = readl(&pctl->trefi), 493 writel(0, &pctl->trefi); 494 495 clrsetbits_le32(&ddr_phy->ddrphy_reg2, 0x03, 496 DQS_SQU_CAL_NORMAL_MODE | DQS_SQU_CAL_START); 497 498 rockchip_udelay(1); 499 while ((readl(&ddr_phy->ddrphy_reg62) & CAL_DONE_MASK) != 500 (HIGH_8BIT_CAL_DONE | LOW_8BIT_CAL_DONE)) { 501 ; 502 } 503 504 clrsetbits_le32(&ddr_phy->ddrphy_reg2, 0x03, 505 DQS_SQU_CAL_NORMAL_MODE | DQS_SQU_NO_CAL); 506 507 /* 508 * since data training will take about 20us, so send some auto 509 * refresh(about 7.8us) to complement the lost time 510 */ 511 send_command(pctl, 3, REF_CMD, 0); 512 send_command(pctl, 3, REF_CMD, 0); 513 send_command(pctl, 3, REF_CMD, 0); 514 515 writel(value, &pctl->trefi); 516 } 517 518 static void move_to_config_state(struct rk3036_sdram_priv *priv) 519 { 520 unsigned int state; 521 struct rk3036_ddr_pctl *pctl = priv->pctl; 522 523 while (1) { 524 state = readl(&pctl->stat) & PCTL_STAT_MASK; 525 switch (state) { 526 case LOW_POWER: 527 writel(WAKEUP_STATE, &pctl->sctl); 528 while ((readl(&pctl->stat) & PCTL_STAT_MASK) 529 != ACCESS) 530 ; 531 /* 532 * If at low power state, need wakeup first, and then 533 * enter the config, so fallthrough 534 */ 535 case ACCESS: 536 /* fallthrough */ 537 case INIT_MEM: 538 writel(CFG_STATE, &pctl->sctl); 539 while ((readl(&pctl->stat) & PCTL_STAT_MASK) != CONFIG) 540 ; 541 break; 542 case CONFIG: 543 return; 544 default: 545 break; 546 } 547 } 548 } 549 550 static void move_to_access_state(struct rk3036_sdram_priv *priv) 551 { 552 unsigned int state; 553 struct rk3036_ddr_pctl *pctl = priv->pctl; 554 555 while (1) { 556 state = readl(&pctl->stat) & PCTL_STAT_MASK; 557 switch (state) { 558 case LOW_POWER: 559 writel(WAKEUP_STATE, &pctl->sctl); 560 while ((readl(&pctl->stat) & PCTL_STAT_MASK) != ACCESS) 561 ; 562 break; 563 case INIT_MEM: 564 writel(CFG_STATE, &pctl->sctl); 565 while ((readl(&pctl->stat) & PCTL_STAT_MASK) != CONFIG) 566 ; 567 /* fallthrough */ 568 case CONFIG: 569 writel(GO_STATE, &pctl->sctl); 570 while ((readl(&pctl->stat) & PCTL_STAT_MASK) != ACCESS) 571 ; 572 break; 573 case ACCESS: 574 return; 575 default: 576 break; 577 } 578 } 579 } 580 581 static void pctl_cfg(struct rk3036_sdram_priv *priv) 582 { 583 struct rk3036_ddr_pctl *pctl = priv->pctl; 584 u32 burst_len; 585 u32 reg; 586 587 writel(DFI_INIT_START | DFI_DATA_BYTE_DISABLE_EN, &pctl->dfistcfg0); 588 writel(DFI_DRAM_CLK_SR_EN | DFI_DRAM_CLK_DPD_EN, &pctl->dfistcfg1); 589 writel(DFI_PARITY_INTR_EN | DFI_PARITY_EN, &pctl->dfistcfg2); 590 writel(7 << TLP_RESP_TIME_SHIFT | LP_SR_EN | LP_PD_EN, 591 &pctl->dfilpcfg0); 592 593 writel(1, &pctl->dfitphyupdtype0); 594 writel(0x0d, &pctl->dfitphyrdlat); 595 596 /* cs0 and cs1 write odt enable */ 597 writel((RANK0_ODT_WRITE_SEL | RANK1_ODT_WRITE_SEL), 598 &pctl->dfiodtcfg); 599 600 /* odt write length */ 601 writel(7 << ODT_LEN_BL8_W_SHIFT, &pctl->dfiodtcfg1); 602 603 /* phyupd and ctrlupd disabled */ 604 writel(0, &pctl->dfiupdcfg); 605 606 if ((ddr_timing.noc_timing.burstlen << 1) == 4) 607 burst_len = MEM_BL4; 608 else 609 burst_len = MEM_BL8; 610 611 copy_to_reg(&pctl->togcnt1u, &ddr_timing.pctl_timing.togcnt1u, 612 sizeof(struct rk3036_pctl_timing)); 613 reg = readl(&pctl->tcl); 614 writel(reg - 3, &pctl->dfitrddataen); 615 reg = readl(&pctl->tcwl); 616 writel(reg - 1, &pctl->dfitphywrlat); 617 618 writel(burst_len | (1 & TFAW_CFG_MASK) << TFAW_CFG_SHIFT | 619 PD_EXIT_SLOW_MODE | PD_ACTIVE_POWER_DOWN | 620 (0 & PD_IDLE_MASK) << PD_IDLE_SHIFT, 621 &pctl->mcfg); 622 623 writel(RK_SETBITS(MSCH4_MAINDDR3), &priv->grf->soc_con2); 624 setbits_le32(&pctl->scfg, HW_LOW_POWER_EN); 625 } 626 627 static void phy_cfg(struct rk3036_sdram_priv *priv) 628 { 629 struct rk3036_ddr_phy *ddr_phy = priv->phy; 630 struct rk3036_service_sys *axi_bus = priv->axi_bus; 631 632 writel(ddr_timing.noc_timing.noc_timing, &axi_bus->ddrtiming); 633 writel(0x3f, &axi_bus->readlatency); 634 635 writel(MEMORY_SELECT_DDR3 | DQS_SQU_CAL_NORMAL_MODE, 636 &ddr_phy->ddrphy_reg2); 637 638 clrsetbits_le32(&ddr_phy->ddrphy_reg3, 1, ddr_timing.phy_timing.bl); 639 writel(ddr_timing.phy_timing.cl_al, &ddr_phy->ddrphy_reg4a); 640 writel(PHY_DRV_ODT_SET(PHY_RON_44OHM), &ddr_phy->ddrphy_reg16); 641 writel(PHY_DRV_ODT_SET(PHY_RON_44OHM), &ddr_phy->ddrphy_reg22); 642 writel(PHY_DRV_ODT_SET(PHY_RON_44OHM), &ddr_phy->ddrphy_reg25); 643 writel(PHY_DRV_ODT_SET(PHY_RON_44OHM), &ddr_phy->ddrphy_reg26); 644 writel(PHY_DRV_ODT_SET(PHY_RTT_216OHM), &ddr_phy->ddrphy_reg27); 645 writel(PHY_DRV_ODT_SET(PHY_RTT_216OHM), &ddr_phy->ddrphy_reg28); 646 } 647 648 void dram_cfg_rbc(struct rk3036_sdram_priv *priv) 649 { 650 char noc_config; 651 int i = 0; 652 struct rk3036_ddr_config config = priv->ddr_config; 653 struct rk3036_service_sys *axi_bus = priv->axi_bus; 654 655 move_to_config_state(priv); 656 657 /* 2bit in BIT1, 2 */ 658 if (config.rank == 2) { 659 noc_config = (config.cs0_row - 13) << 4 | config.bank << 1 | 660 1 << 3 | (config.col - 10); 661 if (noc_config == ddr_cfg_2_rbc[9]) { 662 i = 9; 663 goto finish; 664 } else if (noc_config == ddr_cfg_2_rbc[10]) { 665 i = 10; 666 goto finish; 667 } 668 } 669 670 noc_config = (config.cs0_row - 13) << 4 | config.bank << 1 | 671 (config.col - 10); 672 673 for (i = 0; i < sizeof(ddr_cfg_2_rbc); i++) { 674 if (noc_config == ddr_cfg_2_rbc[i]) 675 goto finish; 676 } 677 678 /* bank: 1 bit in BIT6,7, 1bit in BIT1, 2 */ 679 noc_config = 1 << 6 | (config.cs0_row - 13) << 4 | 680 2 << 1 | (config.col - 10); 681 if (noc_config == ddr_cfg_2_rbc[11]) { 682 i = 11; 683 goto finish; 684 } 685 686 /* bank: 2bit in BIT6,7 */ 687 noc_config = (config.bank << 6) | (config.cs0_row - 13) << 4 | 688 (config.col - 10); 689 690 if (noc_config == ddr_cfg_2_rbc[0]) 691 i = 0; 692 else if (noc_config == ddr_cfg_2_rbc[12]) 693 i = 12; 694 else if (noc_config == ddr_cfg_2_rbc[13]) 695 i = 13; 696 finish: 697 writel(i, &axi_bus->ddrconf); 698 move_to_access_state(priv); 699 } 700 701 static void sdram_all_config(struct rk3036_sdram_priv *priv) 702 { 703 u32 os_reg = 0; 704 u32 cs1_row = 0; 705 struct rk3036_ddr_config config = priv->ddr_config; 706 707 if (config.rank > 1) 708 cs1_row = config.cs1_row - 13; 709 710 os_reg = config.ddr_type << DDR_TYPE_SHIFT | 711 0 << DDR_CHN_CNT_SHIFT | 712 (config.rank - 1) << DDR_RANK_CNT_SHIFT | 713 (config.col - 1) << DDR_COL_SHIFT | 714 (config.bank == 3 ? 0 : 1) << DDR_BANK_SHIFT | 715 (config.cs0_row - 13) << DDR_CS0_ROW_SHIFT | 716 cs1_row << DDR_CS1_ROW_SHIFT | 717 1 << DDR_BW_SHIFT | config.bw << DDR_DIE_BW_SHIFT; 718 writel(os_reg, &priv->grf->os_reg[1]); 719 } 720 721 size_t sdram_size(void) 722 { 723 u32 size, os_reg, cs0_row, cs1_row, col, bank, rank; 724 struct rk3036_grf *grf = (void *)GRF_BASE; 725 726 os_reg = readl(&grf->os_reg[1]); 727 728 cs0_row = 13 + ((os_reg >> DDR_CS0_ROW_SHIFT) & DDR_CS0_ROW_MASK); 729 cs1_row = 13 + ((os_reg >> DDR_CS1_ROW_SHIFT) & DDR_CS1_ROW_MASK); 730 col = 9 + ((os_reg >> DDR_COL_SHIFT) & DDR_COL_MASK); 731 bank = 3 - ((os_reg >> DDR_BANK_SHIFT) & DDR_BANK_MASK); 732 rank = 1 + ((os_reg >> DDR_RANK_CNT_SHIFT) & DDR_RANK_CNT_MASK); 733 734 /* row + col + bank + bw(rk3036 only support 16bit, so fix in 1) */ 735 size = 1 << (cs0_row + col + bank + 1); 736 737 if (rank > 1) 738 size += size >> (cs0_row - cs1_row); 739 740 return size; 741 } 742 743 void sdram_init(void) 744 { 745 struct rk3036_sdram_priv sdram_priv; 746 747 sdram_priv.cru = (void *)CRU_BASE; 748 sdram_priv.grf = (void *)GRF_BASE; 749 sdram_priv.phy = (void *)DDR_PHY_BASE; 750 sdram_priv.pctl = (void *)DDR_PCTL_BASE; 751 sdram_priv.axi_bus = (void *)CPU_AXI_BUS_BASE; 752 753 get_ddr_config(&sdram_priv.ddr_config); 754 sdram_all_config(&sdram_priv); 755 rkdclk_init(&sdram_priv); 756 phy_pctrl_reset(&sdram_priv); 757 phy_dll_bypass_set(&sdram_priv, ddr_timing.freq); 758 pctl_cfg(&sdram_priv); 759 phy_cfg(&sdram_priv); 760 writel(POWER_UP_START, &sdram_priv.pctl->powctl); 761 while (!(readl(&sdram_priv.pctl->powstat) & POWER_UP_DONE)) 762 ; 763 memory_init(&sdram_priv); 764 move_to_config_state(&sdram_priv); 765 data_training(&sdram_priv); 766 move_to_access_state(&sdram_priv); 767 dram_cfg_rbc(&sdram_priv); 768 } 769