1/* 2 * Copyright (c) 2012, NVIDIA Corporation. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16 17#include <linux/linkage.h> 18 19#include <soc/tegra/fuse.h> 20 21#include <asm/asm-offsets.h> 22#include <asm/assembler.h> 23#include <asm/cache.h> 24 25#include "flowctrl.h" 26#include "irammap.h" 27#include "sleep.h" 28 29#define EMC_CFG 0xc 30#define EMC_ADR_CFG 0x10 31#define EMC_TIMING_CONTROL 0x28 32#define EMC_REFRESH 0x70 33#define EMC_NOP 0xdc 34#define EMC_SELF_REF 0xe0 35#define EMC_MRW 0xe8 36#define EMC_FBIO_CFG5 0x104 37#define EMC_AUTO_CAL_CONFIG 0x2a4 38#define EMC_AUTO_CAL_INTERVAL 0x2a8 39#define EMC_AUTO_CAL_STATUS 0x2ac 40#define EMC_REQ_CTRL 0x2b0 41#define EMC_CFG_DIG_DLL 0x2bc 42#define EMC_EMC_STATUS 0x2b4 43#define EMC_ZCAL_INTERVAL 0x2e0 44#define EMC_ZQ_CAL 0x2ec 45#define EMC_XM2VTTGENPADCTRL 0x310 46#define EMC_XM2VTTGENPADCTRL2 0x314 47 48#define PMC_CTRL 0x0 49#define PMC_CTRL_SIDE_EFFECT_LP0 (1 << 14) /* enter LP0 when CPU pwr gated */ 50 51#define PMC_PLLP_WB0_OVERRIDE 0xf8 52#define PMC_IO_DPD_REQ 0x1b8 53#define PMC_IO_DPD_STATUS 0x1bc 54 55#define CLK_RESET_CCLK_BURST 0x20 56#define CLK_RESET_CCLK_DIVIDER 0x24 57#define CLK_RESET_SCLK_BURST 0x28 58#define CLK_RESET_SCLK_DIVIDER 0x2c 59 60#define CLK_RESET_PLLC_BASE 0x80 61#define CLK_RESET_PLLC_MISC 0x8c 62#define CLK_RESET_PLLM_BASE 0x90 63#define CLK_RESET_PLLM_MISC 0x9c 64#define CLK_RESET_PLLP_BASE 0xa0 65#define CLK_RESET_PLLP_MISC 0xac 66#define CLK_RESET_PLLA_BASE 0xb0 67#define CLK_RESET_PLLA_MISC 0xbc 68#define CLK_RESET_PLLX_BASE 0xe0 69#define CLK_RESET_PLLX_MISC 0xe4 70#define CLK_RESET_PLLX_MISC3 0x518 71#define CLK_RESET_PLLX_MISC3_IDDQ 3 72#define CLK_RESET_PLLM_MISC_IDDQ 5 73#define CLK_RESET_PLLC_MISC_IDDQ 26 74 75#define CLK_RESET_CLK_SOURCE_MSELECT 0x3b4 76 77#define MSELECT_CLKM (0x3 << 30) 78 79#define LOCK_DELAY 50 /* safety delay after lock is detected */ 80 81#define TEGRA30_POWER_HOTPLUG_SHUTDOWN (1 << 27) /* Hotplug shutdown */ 82 83.macro emc_device_mask, rd, base 84 ldr \rd, [\base, #EMC_ADR_CFG] 85 tst \rd, #0x1 86 moveq \rd, #(0x1 << 8) @ just 1 device 87 movne \rd, #(0x3 << 8) @ 2 devices 88.endm 89 90.macro emc_timing_update, rd, base 91 mov \rd, #1 92 str \rd, [\base, #EMC_TIMING_CONTROL] 931001: 94 ldr \rd, [\base, #EMC_EMC_STATUS] 95 tst \rd, #(0x1<<23) @ wait EMC_STATUS_TIMING_UPDATE_STALLED is clear 96 bne 1001b 97.endm 98 99.macro pll_enable, rd, r_car_base, pll_base, pll_misc 100 ldr \rd, [\r_car_base, #\pll_base] 101 tst \rd, #(1 << 30) 102 orreq \rd, \rd, #(1 << 30) 103 streq \rd, [\r_car_base, #\pll_base] 104 /* Enable lock detector */ 105 .if \pll_misc 106 ldr \rd, [\r_car_base, #\pll_misc] 107 bic \rd, \rd, #(1 << 18) 108 str \rd, [\r_car_base, #\pll_misc] 109 ldr \rd, [\r_car_base, #\pll_misc] 110 ldr \rd, [\r_car_base, #\pll_misc] 111 orr \rd, \rd, #(1 << 18) 112 str \rd, [\r_car_base, #\pll_misc] 113 .endif 114.endm 115 116.macro pll_locked, rd, r_car_base, pll_base 1171: 118 ldr \rd, [\r_car_base, #\pll_base] 119 tst \rd, #(1 << 27) 120 beq 1b 121.endm 122 123.macro pll_iddq_exit, rd, car, iddq, iddq_bit 124 ldr \rd, [\car, #\iddq] 125 bic \rd, \rd, #(1<<\iddq_bit) 126 str \rd, [\car, #\iddq] 127.endm 128 129.macro pll_iddq_entry, rd, car, iddq, iddq_bit 130 ldr \rd, [\car, #\iddq] 131 orr \rd, \rd, #(1<<\iddq_bit) 132 str \rd, [\car, #\iddq] 133.endm 134 135#if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_PM_SLEEP) 136/* 137 * tegra30_hotplug_shutdown(void) 138 * 139 * Powergates the current CPU. 140 * Should never return. 141 */ 142ENTRY(tegra30_hotplug_shutdown) 143 /* Powergate this CPU */ 144 mov r0, #TEGRA30_POWER_HOTPLUG_SHUTDOWN 145 bl tegra30_cpu_shutdown 146 ret lr @ should never get here 147ENDPROC(tegra30_hotplug_shutdown) 148 149/* 150 * tegra30_cpu_shutdown(unsigned long flags) 151 * 152 * Puts the current CPU in wait-for-event mode on the flow controller 153 * and powergates it -- flags (in R0) indicate the request type. 154 * 155 * r10 = SoC ID 156 * corrupts r0-r4, r10-r12 157 */ 158ENTRY(tegra30_cpu_shutdown) 159 cpu_id r3 160 tegra_get_soc_id TEGRA_APB_MISC_VIRT, r10 161 cmp r10, #TEGRA30 162 bne _no_cpu0_chk @ It's not Tegra30 163 164 cmp r3, #0 165 reteq lr @ Must never be called for CPU 0 166_no_cpu0_chk: 167 168 ldr r12, =TEGRA_FLOW_CTRL_VIRT 169 cpu_to_csr_reg r1, r3 170 add r1, r1, r12 @ virtual CSR address for this CPU 171 cpu_to_halt_reg r2, r3 172 add r2, r2, r12 @ virtual HALT_EVENTS address for this CPU 173 174 /* 175 * Clear this CPU's "event" and "interrupt" flags and power gate 176 * it when halting but not before it is in the "WFE" state. 177 */ 178 movw r12, \ 179 FLOW_CTRL_CSR_INTR_FLAG | FLOW_CTRL_CSR_EVENT_FLAG | \ 180 FLOW_CTRL_CSR_ENABLE 181 cmp r10, #TEGRA30 182 moveq r4, #(1 << 4) @ wfe bitmap 183 movne r4, #(1 << 8) @ wfi bitmap 184 ARM( orr r12, r12, r4, lsl r3 ) 185 THUMB( lsl r4, r4, r3 ) 186 THUMB( orr r12, r12, r4 ) 187 str r12, [r1] 188 189 /* Halt this CPU. */ 190 mov r3, #0x400 191delay_1: 192 subs r3, r3, #1 @ delay as a part of wfe war. 193 bge delay_1; 194 cpsid a @ disable imprecise aborts. 195 ldr r3, [r1] @ read CSR 196 str r3, [r1] @ clear CSR 197 198 tst r0, #TEGRA30_POWER_HOTPLUG_SHUTDOWN 199 beq flow_ctrl_setting_for_lp2 200 201 /* flow controller set up for hotplug */ 202 mov r3, #FLOW_CTRL_WAITEVENT @ For hotplug 203 b flow_ctrl_done 204flow_ctrl_setting_for_lp2: 205 /* flow controller set up for LP2 */ 206 cmp r10, #TEGRA30 207 moveq r3, #FLOW_CTRL_WAIT_FOR_INTERRUPT @ For LP2 208 movne r3, #FLOW_CTRL_WAITEVENT 209 orrne r3, r3, #FLOW_CTRL_HALT_GIC_IRQ 210 orrne r3, r3, #FLOW_CTRL_HALT_GIC_FIQ 211flow_ctrl_done: 212 cmp r10, #TEGRA30 213 str r3, [r2] 214 ldr r0, [r2] 215 b wfe_war 216 217__cpu_reset_again: 218 dsb 219 .align 5 220 wfeeq @ CPU should be power gated here 221 wfine 222wfe_war: 223 b __cpu_reset_again 224 225 /* 226 * 38 nop's, which fills rest of wfe cache line and 227 * 4 more cachelines with nop 228 */ 229 .rept 38 230 nop 231 .endr 232 b . @ should never get here 233 234ENDPROC(tegra30_cpu_shutdown) 235#endif 236 237#ifdef CONFIG_PM_SLEEP 238/* 239 * tegra30_sleep_core_finish(unsigned long v2p) 240 * 241 * Enters suspend in LP0 or LP1 by turning off the MMU and jumping to 242 * tegra30_tear_down_core in IRAM 243 */ 244ENTRY(tegra30_sleep_core_finish) 245 /* Flush, disable the L1 data cache and exit SMP */ 246 bl tegra_disable_clean_inv_dcache 247 248 /* 249 * Preload all the address literals that are needed for the 250 * CPU power-gating process, to avoid loading from SDRAM which 251 * are not supported once SDRAM is put into self-refresh. 252 * LP0 / LP1 use physical address, since the MMU needs to be 253 * disabled before putting SDRAM into self-refresh to avoid 254 * memory access due to page table walks. 255 */ 256 mov32 r4, TEGRA_PMC_BASE 257 mov32 r5, TEGRA_CLK_RESET_BASE 258 mov32 r6, TEGRA_FLOW_CTRL_BASE 259 mov32 r7, TEGRA_TMRUS_BASE 260 261 mov32 r3, tegra_shut_off_mmu 262 add r3, r3, r0 263 264 mov32 r0, tegra30_tear_down_core 265 mov32 r1, tegra30_iram_start 266 sub r0, r0, r1 267 mov32 r1, TEGRA_IRAM_LPx_RESUME_AREA 268 add r0, r0, r1 269 270 ret r3 271ENDPROC(tegra30_sleep_core_finish) 272 273/* 274 * tegra30_sleep_cpu_secondary_finish(unsigned long v2p) 275 * 276 * Enters LP2 on secondary CPU by exiting coherency and powergating the CPU. 277 */ 278ENTRY(tegra30_sleep_cpu_secondary_finish) 279 mov r7, lr 280 281 /* Flush and disable the L1 data cache */ 282 mov r0, #TEGRA_FLUSH_CACHE_LOUIS 283 bl tegra_disable_clean_inv_dcache 284 285 /* Powergate this CPU. */ 286 mov r0, #0 @ power mode flags (!hotplug) 287 bl tegra30_cpu_shutdown 288 mov r0, #1 @ never return here 289 ret r7 290ENDPROC(tegra30_sleep_cpu_secondary_finish) 291 292/* 293 * tegra30_tear_down_cpu 294 * 295 * Switches the CPU to enter sleep. 296 */ 297ENTRY(tegra30_tear_down_cpu) 298 mov32 r6, TEGRA_FLOW_CTRL_BASE 299 300 b tegra30_enter_sleep 301ENDPROC(tegra30_tear_down_cpu) 302 303/* START OF ROUTINES COPIED TO IRAM */ 304 .align L1_CACHE_SHIFT 305 .globl tegra30_iram_start 306tegra30_iram_start: 307 308/* 309 * tegra30_lp1_reset 310 * 311 * reset vector for LP1 restore; copied into IRAM during suspend. 312 * Brings the system back up to a safe staring point (SDRAM out of 313 * self-refresh, PLLC, PLLM and PLLP reenabled, CPU running on PLLX, 314 * system clock running on the same PLL that it suspended at), and 315 * jumps to tegra_resume to restore virtual addressing. 316 * The physical address of tegra_resume expected to be stored in 317 * PMC_SCRATCH41. 318 * 319 * NOTE: THIS *MUST* BE RELOCATED TO TEGRA_IRAM_LPx_RESUME_AREA. 320 */ 321ENTRY(tegra30_lp1_reset) 322 /* 323 * The CPU and system bus are running at 32KHz and executing from 324 * IRAM when this code is executed; immediately switch to CLKM and 325 * enable PLLP, PLLM, PLLC, PLLA and PLLX. 326 */ 327 mov32 r0, TEGRA_CLK_RESET_BASE 328 329 mov r1, #(1 << 28) 330 str r1, [r0, #CLK_RESET_SCLK_BURST] 331 str r1, [r0, #CLK_RESET_CCLK_BURST] 332 mov r1, #0 333 str r1, [r0, #CLK_RESET_CCLK_DIVIDER] 334 str r1, [r0, #CLK_RESET_SCLK_DIVIDER] 335 336 tegra_get_soc_id TEGRA_APB_MISC_BASE, r10 337 cmp r10, #TEGRA30 338 beq _no_pll_iddq_exit 339 340 pll_iddq_exit r1, r0, CLK_RESET_PLLM_MISC, CLK_RESET_PLLM_MISC_IDDQ 341 pll_iddq_exit r1, r0, CLK_RESET_PLLC_MISC, CLK_RESET_PLLC_MISC_IDDQ 342 pll_iddq_exit r1, r0, CLK_RESET_PLLX_MISC3, CLK_RESET_PLLX_MISC3_IDDQ 343 344 mov32 r7, TEGRA_TMRUS_BASE 345 ldr r1, [r7] 346 add r1, r1, #2 347 wait_until r1, r7, r3 348 349 /* enable PLLM via PMC */ 350 mov32 r2, TEGRA_PMC_BASE 351 ldr r1, [r2, #PMC_PLLP_WB0_OVERRIDE] 352 orr r1, r1, #(1 << 12) 353 str r1, [r2, #PMC_PLLP_WB0_OVERRIDE] 354 355 pll_enable r1, r0, CLK_RESET_PLLM_BASE, 0 356 pll_enable r1, r0, CLK_RESET_PLLC_BASE, 0 357 pll_enable r1, r0, CLK_RESET_PLLX_BASE, 0 358 359 b _pll_m_c_x_done 360 361_no_pll_iddq_exit: 362 /* enable PLLM via PMC */ 363 mov32 r2, TEGRA_PMC_BASE 364 ldr r1, [r2, #PMC_PLLP_WB0_OVERRIDE] 365 orr r1, r1, #(1 << 12) 366 str r1, [r2, #PMC_PLLP_WB0_OVERRIDE] 367 368 pll_enable r1, r0, CLK_RESET_PLLM_BASE, CLK_RESET_PLLM_MISC 369 pll_enable r1, r0, CLK_RESET_PLLC_BASE, CLK_RESET_PLLC_MISC 370 pll_enable r1, r0, CLK_RESET_PLLX_BASE, CLK_RESET_PLLX_MISC 371 372_pll_m_c_x_done: 373 pll_enable r1, r0, CLK_RESET_PLLP_BASE, CLK_RESET_PLLP_MISC 374 pll_enable r1, r0, CLK_RESET_PLLA_BASE, CLK_RESET_PLLA_MISC 375 376 pll_locked r1, r0, CLK_RESET_PLLM_BASE 377 pll_locked r1, r0, CLK_RESET_PLLP_BASE 378 pll_locked r1, r0, CLK_RESET_PLLA_BASE 379 pll_locked r1, r0, CLK_RESET_PLLC_BASE 380 pll_locked r1, r0, CLK_RESET_PLLX_BASE 381 382 mov32 r7, TEGRA_TMRUS_BASE 383 ldr r1, [r7] 384 add r1, r1, #LOCK_DELAY 385 wait_until r1, r7, r3 386 387 adr r5, tegra_sdram_pad_save 388 389 ldr r4, [r5, #0x18] @ restore CLK_SOURCE_MSELECT 390 str r4, [r0, #CLK_RESET_CLK_SOURCE_MSELECT] 391 392 ldr r4, [r5, #0x1C] @ restore SCLK_BURST 393 str r4, [r0, #CLK_RESET_SCLK_BURST] 394 395 cmp r10, #TEGRA30 396 movweq r4, #:lower16:((1 << 28) | (0x8)) @ burst policy is PLLX 397 movteq r4, #:upper16:((1 << 28) | (0x8)) 398 movwne r4, #:lower16:((1 << 28) | (0xe)) 399 movtne r4, #:upper16:((1 << 28) | (0xe)) 400 str r4, [r0, #CLK_RESET_CCLK_BURST] 401 402 /* Restore pad power state to normal */ 403 ldr r1, [r5, #0x14] @ PMC_IO_DPD_STATUS 404 mvn r1, r1 405 bic r1, r1, #(1 << 31) 406 orr r1, r1, #(1 << 30) 407 str r1, [r2, #PMC_IO_DPD_REQ] @ DPD_OFF 408 409 cmp r10, #TEGRA30 410 movweq r0, #:lower16:TEGRA_EMC_BASE @ r0 reserved for emc base 411 movteq r0, #:upper16:TEGRA_EMC_BASE 412 cmp r10, #TEGRA114 413 movweq r0, #:lower16:TEGRA_EMC0_BASE 414 movteq r0, #:upper16:TEGRA_EMC0_BASE 415 cmp r10, #TEGRA124 416 movweq r0, #:lower16:TEGRA124_EMC_BASE 417 movteq r0, #:upper16:TEGRA124_EMC_BASE 418 419exit_self_refresh: 420 ldr r1, [r5, #0xC] @ restore EMC_XM2VTTGENPADCTRL 421 str r1, [r0, #EMC_XM2VTTGENPADCTRL] 422 ldr r1, [r5, #0x10] @ restore EMC_XM2VTTGENPADCTRL2 423 str r1, [r0, #EMC_XM2VTTGENPADCTRL2] 424 ldr r1, [r5, #0x8] @ restore EMC_AUTO_CAL_INTERVAL 425 str r1, [r0, #EMC_AUTO_CAL_INTERVAL] 426 427 /* Relock DLL */ 428 ldr r1, [r0, #EMC_CFG_DIG_DLL] 429 orr r1, r1, #(1 << 30) @ set DLL_RESET 430 str r1, [r0, #EMC_CFG_DIG_DLL] 431 432 emc_timing_update r1, r0 433 434 cmp r10, #TEGRA114 435 movweq r1, #:lower16:TEGRA_EMC1_BASE 436 movteq r1, #:upper16:TEGRA_EMC1_BASE 437 cmpeq r0, r1 438 439 ldr r1, [r0, #EMC_AUTO_CAL_CONFIG] 440 orr r1, r1, #(1 << 31) @ set AUTO_CAL_ACTIVE 441 orreq r1, r1, #(1 << 27) @ set slave mode for channel 1 442 str r1, [r0, #EMC_AUTO_CAL_CONFIG] 443 444emc_wait_auto_cal_onetime: 445 ldr r1, [r0, #EMC_AUTO_CAL_STATUS] 446 tst r1, #(1 << 31) @ wait until AUTO_CAL_ACTIVE is cleared 447 bne emc_wait_auto_cal_onetime 448 449 ldr r1, [r0, #EMC_CFG] 450 bic r1, r1, #(1 << 31) @ disable DRAM_CLK_STOP_PD 451 str r1, [r0, #EMC_CFG] 452 453 mov r1, #0 454 str r1, [r0, #EMC_SELF_REF] @ take DRAM out of self refresh 455 mov r1, #1 456 cmp r10, #TEGRA30 457 streq r1, [r0, #EMC_NOP] 458 streq r1, [r0, #EMC_NOP] 459 streq r1, [r0, #EMC_REFRESH] 460 461 emc_device_mask r1, r0 462 463exit_selfrefresh_loop: 464 ldr r2, [r0, #EMC_EMC_STATUS] 465 ands r2, r2, r1 466 bne exit_selfrefresh_loop 467 468 lsr r1, r1, #8 @ devSel, bit0:dev0, bit1:dev1 469 470 mov32 r7, TEGRA_TMRUS_BASE 471 ldr r2, [r0, #EMC_FBIO_CFG5] 472 473 and r2, r2, #3 @ check DRAM_TYPE 474 cmp r2, #2 475 beq emc_lpddr2 476 477 /* Issue a ZQ_CAL for dev0 - DDR3 */ 478 mov32 r2, 0x80000011 @ DEV_SELECTION=2, LENGTH=LONG, CMD=1 479 str r2, [r0, #EMC_ZQ_CAL] 480 ldr r2, [r7] 481 add r2, r2, #10 482 wait_until r2, r7, r3 483 484 tst r1, #2 485 beq zcal_done 486 487 /* Issue a ZQ_CAL for dev1 - DDR3 */ 488 mov32 r2, 0x40000011 @ DEV_SELECTION=1, LENGTH=LONG, CMD=1 489 str r2, [r0, #EMC_ZQ_CAL] 490 ldr r2, [r7] 491 add r2, r2, #10 492 wait_until r2, r7, r3 493 b zcal_done 494 495emc_lpddr2: 496 /* Issue a ZQ_CAL for dev0 - LPDDR2 */ 497 mov32 r2, 0x800A00AB @ DEV_SELECTION=2, MA=10, OP=0xAB 498 str r2, [r0, #EMC_MRW] 499 ldr r2, [r7] 500 add r2, r2, #1 501 wait_until r2, r7, r3 502 503 tst r1, #2 504 beq zcal_done 505 506 /* Issue a ZQ_CAL for dev0 - LPDDR2 */ 507 mov32 r2, 0x400A00AB @ DEV_SELECTION=1, MA=10, OP=0xAB 508 str r2, [r0, #EMC_MRW] 509 ldr r2, [r7] 510 add r2, r2, #1 511 wait_until r2, r7, r3 512 513zcal_done: 514 mov r1, #0 @ unstall all transactions 515 str r1, [r0, #EMC_REQ_CTRL] 516 ldr r1, [r5, #0x4] @ restore EMC_ZCAL_INTERVAL 517 str r1, [r0, #EMC_ZCAL_INTERVAL] 518 ldr r1, [r5, #0x0] @ restore EMC_CFG 519 str r1, [r0, #EMC_CFG] 520 521 /* Tegra114 had dual EMC channel, now config the other one */ 522 cmp r10, #TEGRA114 523 bne __no_dual_emc_chanl 524 mov32 r1, TEGRA_EMC1_BASE 525 cmp r0, r1 526 movne r0, r1 527 addne r5, r5, #0x20 528 bne exit_self_refresh 529__no_dual_emc_chanl: 530 531 mov32 r0, TEGRA_PMC_BASE 532 ldr r0, [r0, #PMC_SCRATCH41] 533 ret r0 @ jump to tegra_resume 534ENDPROC(tegra30_lp1_reset) 535 536 .align L1_CACHE_SHIFT 537tegra30_sdram_pad_address: 538 .word TEGRA_EMC_BASE + EMC_CFG @0x0 539 .word TEGRA_EMC_BASE + EMC_ZCAL_INTERVAL @0x4 540 .word TEGRA_EMC_BASE + EMC_AUTO_CAL_INTERVAL @0x8 541 .word TEGRA_EMC_BASE + EMC_XM2VTTGENPADCTRL @0xc 542 .word TEGRA_EMC_BASE + EMC_XM2VTTGENPADCTRL2 @0x10 543 .word TEGRA_PMC_BASE + PMC_IO_DPD_STATUS @0x14 544 .word TEGRA_CLK_RESET_BASE + CLK_RESET_CLK_SOURCE_MSELECT @0x18 545 .word TEGRA_CLK_RESET_BASE + CLK_RESET_SCLK_BURST @0x1c 546tegra30_sdram_pad_address_end: 547 548tegra114_sdram_pad_address: 549 .word TEGRA_EMC0_BASE + EMC_CFG @0x0 550 .word TEGRA_EMC0_BASE + EMC_ZCAL_INTERVAL @0x4 551 .word TEGRA_EMC0_BASE + EMC_AUTO_CAL_INTERVAL @0x8 552 .word TEGRA_EMC0_BASE + EMC_XM2VTTGENPADCTRL @0xc 553 .word TEGRA_EMC0_BASE + EMC_XM2VTTGENPADCTRL2 @0x10 554 .word TEGRA_PMC_BASE + PMC_IO_DPD_STATUS @0x14 555 .word TEGRA_CLK_RESET_BASE + CLK_RESET_CLK_SOURCE_MSELECT @0x18 556 .word TEGRA_CLK_RESET_BASE + CLK_RESET_SCLK_BURST @0x1c 557 .word TEGRA_EMC1_BASE + EMC_CFG @0x20 558 .word TEGRA_EMC1_BASE + EMC_ZCAL_INTERVAL @0x24 559 .word TEGRA_EMC1_BASE + EMC_AUTO_CAL_INTERVAL @0x28 560 .word TEGRA_EMC1_BASE + EMC_XM2VTTGENPADCTRL @0x2c 561 .word TEGRA_EMC1_BASE + EMC_XM2VTTGENPADCTRL2 @0x30 562tegra114_sdram_pad_adress_end: 563 564tegra124_sdram_pad_address: 565 .word TEGRA124_EMC_BASE + EMC_CFG @0x0 566 .word TEGRA124_EMC_BASE + EMC_ZCAL_INTERVAL @0x4 567 .word TEGRA124_EMC_BASE + EMC_AUTO_CAL_INTERVAL @0x8 568 .word TEGRA124_EMC_BASE + EMC_XM2VTTGENPADCTRL @0xc 569 .word TEGRA124_EMC_BASE + EMC_XM2VTTGENPADCTRL2 @0x10 570 .word TEGRA_PMC_BASE + PMC_IO_DPD_STATUS @0x14 571 .word TEGRA_CLK_RESET_BASE + CLK_RESET_CLK_SOURCE_MSELECT @0x18 572 .word TEGRA_CLK_RESET_BASE + CLK_RESET_SCLK_BURST @0x1c 573tegra124_sdram_pad_address_end: 574 575tegra30_sdram_pad_size: 576 .word tegra30_sdram_pad_address_end - tegra30_sdram_pad_address 577 578tegra114_sdram_pad_size: 579 .word tegra114_sdram_pad_adress_end - tegra114_sdram_pad_address 580 581 .type tegra_sdram_pad_save, %object 582tegra_sdram_pad_save: 583 .rept (tegra114_sdram_pad_adress_end - tegra114_sdram_pad_address) / 4 584 .long 0 585 .endr 586 587/* 588 * tegra30_tear_down_core 589 * 590 * copied into and executed from IRAM 591 * puts memory in self-refresh for LP0 and LP1 592 */ 593tegra30_tear_down_core: 594 bl tegra30_sdram_self_refresh 595 bl tegra30_switch_cpu_to_clk32k 596 b tegra30_enter_sleep 597 598/* 599 * tegra30_switch_cpu_to_clk32k 600 * 601 * In LP0 and LP1 all PLLs will be turned off. Switching the CPU and System CLK 602 * to the 32KHz clock. 603 * r4 = TEGRA_PMC_BASE 604 * r5 = TEGRA_CLK_RESET_BASE 605 * r6 = TEGRA_FLOW_CTRL_BASE 606 * r7 = TEGRA_TMRUS_BASE 607 * r10= SoC ID 608 */ 609tegra30_switch_cpu_to_clk32k: 610 /* 611 * start by jumping to CLKM to safely disable PLLs, then jump to 612 * CLKS. 613 */ 614 mov r0, #(1 << 28) 615 str r0, [r5, #CLK_RESET_SCLK_BURST] 616 /* 2uS delay delay between changing SCLK and CCLK */ 617 ldr r1, [r7] 618 add r1, r1, #2 619 wait_until r1, r7, r9 620 str r0, [r5, #CLK_RESET_CCLK_BURST] 621 mov r0, #0 622 str r0, [r5, #CLK_RESET_CCLK_DIVIDER] 623 str r0, [r5, #CLK_RESET_SCLK_DIVIDER] 624 625 /* switch the clock source of mselect to be CLK_M */ 626 ldr r0, [r5, #CLK_RESET_CLK_SOURCE_MSELECT] 627 orr r0, r0, #MSELECT_CLKM 628 str r0, [r5, #CLK_RESET_CLK_SOURCE_MSELECT] 629 630 /* 2uS delay delay between changing SCLK and disabling PLLs */ 631 ldr r1, [r7] 632 add r1, r1, #2 633 wait_until r1, r7, r9 634 635 /* disable PLLM via PMC in LP1 */ 636 ldr r0, [r4, #PMC_PLLP_WB0_OVERRIDE] 637 bic r0, r0, #(1 << 12) 638 str r0, [r4, #PMC_PLLP_WB0_OVERRIDE] 639 640 /* disable PLLP, PLLA, PLLC and PLLX */ 641 ldr r0, [r5, #CLK_RESET_PLLP_BASE] 642 bic r0, r0, #(1 << 30) 643 str r0, [r5, #CLK_RESET_PLLP_BASE] 644 ldr r0, [r5, #CLK_RESET_PLLA_BASE] 645 bic r0, r0, #(1 << 30) 646 str r0, [r5, #CLK_RESET_PLLA_BASE] 647 ldr r0, [r5, #CLK_RESET_PLLC_BASE] 648 bic r0, r0, #(1 << 30) 649 str r0, [r5, #CLK_RESET_PLLC_BASE] 650 ldr r0, [r5, #CLK_RESET_PLLX_BASE] 651 bic r0, r0, #(1 << 30) 652 str r0, [r5, #CLK_RESET_PLLX_BASE] 653 654 cmp r10, #TEGRA30 655 beq _no_pll_in_iddq 656 pll_iddq_entry r1, r5, CLK_RESET_PLLX_MISC3, CLK_RESET_PLLX_MISC3_IDDQ 657_no_pll_in_iddq: 658 659 /* switch to CLKS */ 660 mov r0, #0 /* brust policy = 32KHz */ 661 str r0, [r5, #CLK_RESET_SCLK_BURST] 662 663 ret lr 664 665/* 666 * tegra30_enter_sleep 667 * 668 * uses flow controller to enter sleep state 669 * executes from IRAM with SDRAM in selfrefresh when target state is LP0 or LP1 670 * executes from SDRAM with target state is LP2 671 * r6 = TEGRA_FLOW_CTRL_BASE 672 */ 673tegra30_enter_sleep: 674 cpu_id r1 675 676 cpu_to_csr_reg r2, r1 677 ldr r0, [r6, r2] 678 orr r0, r0, #FLOW_CTRL_CSR_INTR_FLAG | FLOW_CTRL_CSR_EVENT_FLAG 679 orr r0, r0, #FLOW_CTRL_CSR_ENABLE 680 str r0, [r6, r2] 681 682 tegra_get_soc_id TEGRA_APB_MISC_BASE, r10 683 cmp r10, #TEGRA30 684 mov r0, #FLOW_CTRL_WAIT_FOR_INTERRUPT 685 orreq r0, r0, #FLOW_CTRL_HALT_CPU_IRQ | FLOW_CTRL_HALT_CPU_FIQ 686 orrne r0, r0, #FLOW_CTRL_HALT_LIC_IRQ | FLOW_CTRL_HALT_LIC_FIQ 687 688 cpu_to_halt_reg r2, r1 689 str r0, [r6, r2] 690 dsb 691 ldr r0, [r6, r2] /* memory barrier */ 692 693halted: 694 isb 695 dsb 696 wfi /* CPU should be power gated here */ 697 698 /* !!!FIXME!!! Implement halt failure handler */ 699 b halted 700 701/* 702 * tegra30_sdram_self_refresh 703 * 704 * called with MMU off and caches disabled 705 * must be executed from IRAM 706 * r4 = TEGRA_PMC_BASE 707 * r5 = TEGRA_CLK_RESET_BASE 708 * r6 = TEGRA_FLOW_CTRL_BASE 709 * r7 = TEGRA_TMRUS_BASE 710 * r10= SoC ID 711 */ 712tegra30_sdram_self_refresh: 713 714 adr r8, tegra_sdram_pad_save 715 tegra_get_soc_id TEGRA_APB_MISC_BASE, r10 716 cmp r10, #TEGRA30 717 adreq r2, tegra30_sdram_pad_address 718 ldreq r3, tegra30_sdram_pad_size 719 cmp r10, #TEGRA114 720 adreq r2, tegra114_sdram_pad_address 721 ldreq r3, tegra114_sdram_pad_size 722 cmp r10, #TEGRA124 723 adreq r2, tegra124_sdram_pad_address 724 ldreq r3, tegra30_sdram_pad_size 725 726 mov r9, #0 727 728padsave: 729 ldr r0, [r2, r9] @ r0 is the addr in the pad_address 730 731 ldr r1, [r0] 732 str r1, [r8, r9] @ save the content of the addr 733 734 add r9, r9, #4 735 cmp r3, r9 736 bne padsave 737padsave_done: 738 739 dsb 740 741 cmp r10, #TEGRA30 742 ldreq r0, =TEGRA_EMC_BASE @ r0 reserved for emc base addr 743 cmp r10, #TEGRA114 744 ldreq r0, =TEGRA_EMC0_BASE 745 cmp r10, #TEGRA124 746 ldreq r0, =TEGRA124_EMC_BASE 747 748enter_self_refresh: 749 cmp r10, #TEGRA30 750 mov r1, #0 751 str r1, [r0, #EMC_ZCAL_INTERVAL] 752 str r1, [r0, #EMC_AUTO_CAL_INTERVAL] 753 ldr r1, [r0, #EMC_CFG] 754 bic r1, r1, #(1 << 28) 755 bicne r1, r1, #(1 << 29) 756 str r1, [r0, #EMC_CFG] @ disable DYN_SELF_REF 757 758 emc_timing_update r1, r0 759 760 ldr r1, [r7] 761 add r1, r1, #5 762 wait_until r1, r7, r2 763 764emc_wait_auto_cal: 765 ldr r1, [r0, #EMC_AUTO_CAL_STATUS] 766 tst r1, #(1 << 31) @ wait until AUTO_CAL_ACTIVE is cleared 767 bne emc_wait_auto_cal 768 769 mov r1, #3 770 str r1, [r0, #EMC_REQ_CTRL] @ stall incoming DRAM requests 771 772emcidle: 773 ldr r1, [r0, #EMC_EMC_STATUS] 774 tst r1, #4 775 beq emcidle 776 777 mov r1, #1 778 str r1, [r0, #EMC_SELF_REF] 779 780 emc_device_mask r1, r0 781 782emcself: 783 ldr r2, [r0, #EMC_EMC_STATUS] 784 and r2, r2, r1 785 cmp r2, r1 786 bne emcself @ loop until DDR in self-refresh 787 788 /* Put VTTGEN in the lowest power mode */ 789 ldr r1, [r0, #EMC_XM2VTTGENPADCTRL] 790 mov32 r2, 0xF8F8FFFF @ clear XM2VTTGEN_DRVUP and XM2VTTGEN_DRVDN 791 and r1, r1, r2 792 str r1, [r0, #EMC_XM2VTTGENPADCTRL] 793 ldr r1, [r0, #EMC_XM2VTTGENPADCTRL2] 794 cmp r10, #TEGRA30 795 orreq r1, r1, #7 @ set E_NO_VTTGEN 796 orrne r1, r1, #0x3f 797 str r1, [r0, #EMC_XM2VTTGENPADCTRL2] 798 799 emc_timing_update r1, r0 800 801 /* Tegra114 had dual EMC channel, now config the other one */ 802 cmp r10, #TEGRA114 803 bne no_dual_emc_chanl 804 mov32 r1, TEGRA_EMC1_BASE 805 cmp r0, r1 806 movne r0, r1 807 bne enter_self_refresh 808no_dual_emc_chanl: 809 810 ldr r1, [r4, #PMC_CTRL] 811 tst r1, #PMC_CTRL_SIDE_EFFECT_LP0 812 bne pmc_io_dpd_skip 813 /* 814 * Put DDR_DATA, DISC_ADDR_CMD, DDR_ADDR_CMD, POP_ADDR_CMD, POP_CLK 815 * and COMP in the lowest power mode when LP1. 816 */ 817 mov32 r1, 0x8EC00000 818 str r1, [r4, #PMC_IO_DPD_REQ] 819pmc_io_dpd_skip: 820 821 dsb 822 823 ret lr 824 825 .ltorg 826/* dummy symbol for end of IRAM */ 827 .align L1_CACHE_SHIFT 828 .global tegra30_iram_end 829tegra30_iram_end: 830 b . 831#endif 832