1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * ti-sysc.c - Texas Instruments sysc interconnect target driver 4 * 5 * TI SoCs have an interconnect target wrapper IP for many devices. The wrapper 6 * IP manages clock gating, resets, and PM capabilities for the connected devices. 7 * 8 * Copyright (C) 2017-2024 Texas Instruments Incorporated - https://www.ti.com/ 9 * 10 * Many features are based on the earlier omap_hwmod arch code with thanks to all 11 * the people who developed and debugged the code over the years: 12 * 13 * Copyright (C) 2009-2011 Nokia Corporation 14 * Copyright (C) 2011-2021 Texas Instruments Incorporated - https://www.ti.com/ 15 */ 16 17 #include <linux/io.h> 18 #include <linux/clk.h> 19 #include <linux/clkdev.h> 20 #include <linux/cpu_pm.h> 21 #include <linux/delay.h> 22 #include <linux/list.h> 23 #include <linux/module.h> 24 #include <linux/platform_device.h> 25 #include <linux/pm_domain.h> 26 #include <linux/pm_runtime.h> 27 #include <linux/reset.h> 28 #include <linux/of_address.h> 29 #include <linux/of_platform.h> 30 #include <linux/slab.h> 31 #include <linux/sys_soc.h> 32 #include <linux/timekeeping.h> 33 #include <linux/iopoll.h> 34 35 #include <linux/platform_data/ti-sysc.h> 36 37 #include <dt-bindings/bus/ti-sysc.h> 38 39 #define DIS_ISP BIT(2) 40 #define DIS_IVA BIT(1) 41 #define DIS_SGX BIT(0) 42 43 #define SOC_FLAG(match, flag) { .machine = match, .data = (void *)(flag), } 44 45 #define MAX_MODULE_SOFTRESET_WAIT 10000 46 47 enum sysc_soc { 48 SOC_UNKNOWN, 49 SOC_2420, 50 SOC_2430, 51 SOC_3430, 52 SOC_AM35, 53 SOC_3630, 54 SOC_4430, 55 SOC_4460, 56 SOC_4470, 57 SOC_5430, 58 SOC_AM3, 59 SOC_AM4, 60 SOC_DRA7, 61 }; 62 63 struct sysc_address { 64 unsigned long base; 65 struct list_head node; 66 }; 67 68 struct sysc_module { 69 struct sysc *ddata; 70 struct list_head node; 71 }; 72 73 struct sysc_soc_info { 74 unsigned long general_purpose:1; 75 enum sysc_soc soc; 76 struct mutex list_lock; /* disabled and restored modules list lock */ 77 struct list_head disabled_modules; 78 struct list_head restored_modules; 79 struct notifier_block nb; 80 }; 81 82 enum sysc_clocks { 83 SYSC_FCK, 84 SYSC_ICK, 85 SYSC_OPTFCK0, 86 SYSC_OPTFCK1, 87 SYSC_OPTFCK2, 88 SYSC_OPTFCK3, 89 SYSC_OPTFCK4, 90 SYSC_OPTFCK5, 91 SYSC_OPTFCK6, 92 SYSC_OPTFCK7, 93 SYSC_MAX_CLOCKS, 94 }; 95 96 static struct sysc_soc_info *sysc_soc; 97 static const char * const reg_names[] = { "rev", "sysc", "syss", }; 98 static const char * const clock_names[SYSC_MAX_CLOCKS] = { 99 "fck", "ick", "opt0", "opt1", "opt2", "opt3", "opt4", 100 "opt5", "opt6", "opt7", 101 }; 102 103 #define SYSC_IDLEMODE_MASK 3 104 #define SYSC_CLOCKACTIVITY_MASK 3 105 106 /** 107 * struct sysc - TI sysc interconnect target module registers and capabilities 108 * @dev: struct device pointer 109 * @module_pa: physical address of the interconnect target module 110 * @module_size: size of the interconnect target module 111 * @module_va: virtual address of the interconnect target module 112 * @offsets: register offsets from module base 113 * @mdata: ti-sysc to hwmod translation data for a module 114 * @clocks: clocks used by the interconnect target module 115 * @clock_roles: clock role names for the found clocks 116 * @nr_clocks: number of clocks used by the interconnect target module 117 * @rsts: resets used by the interconnect target module 118 * @legacy_mode: configured for legacy mode if set 119 * @cap: interconnect target module capabilities 120 * @cfg: interconnect target module configuration 121 * @cookie: data used by legacy platform callbacks 122 * @name: name if available 123 * @revision: interconnect target module revision 124 * @sysconfig: saved sysconfig register value 125 * @reserved: target module is reserved and already in use 126 * @enabled: sysc runtime enabled status 127 * @needs_resume: runtime resume needed on resume from suspend 128 * @child_needs_resume: runtime resume needed for child on resume from suspend 129 * @disable_on_idle: status flag used for disabling modules with resets 130 * @idle_work: work structure used to perform delayed idle on a module 131 * @pre_reset_quirk: module specific pre-reset quirk 132 * @post_reset_quirk: module specific post-reset quirk 133 * @reset_done_quirk: module specific reset done quirk 134 * @module_enable_quirk: module specific enable quirk 135 * @module_disable_quirk: module specific disable quirk 136 * @module_unlock_quirk: module specific sysconfig unlock quirk 137 * @module_lock_quirk: module specific sysconfig lock quirk 138 */ 139 struct sysc { 140 struct device *dev; 141 u64 module_pa; 142 u32 module_size; 143 void __iomem *module_va; 144 int offsets[SYSC_MAX_REGS]; 145 struct ti_sysc_module_data *mdata; 146 struct clk **clocks; 147 const char **clock_roles; 148 int nr_clocks; 149 struct reset_control *rsts; 150 const char *legacy_mode; 151 const struct sysc_capabilities *cap; 152 struct sysc_config cfg; 153 struct ti_sysc_cookie cookie; 154 const char *name; 155 u32 revision; 156 u32 sysconfig; 157 unsigned int reserved:1; 158 unsigned int enabled:1; 159 unsigned int needs_resume:1; 160 unsigned int child_needs_resume:1; 161 struct delayed_work idle_work; 162 void (*pre_reset_quirk)(struct sysc *sysc); 163 void (*post_reset_quirk)(struct sysc *sysc); 164 void (*reset_done_quirk)(struct sysc *sysc); 165 void (*module_enable_quirk)(struct sysc *sysc); 166 void (*module_disable_quirk)(struct sysc *sysc); 167 void (*module_unlock_quirk)(struct sysc *sysc); 168 void (*module_lock_quirk)(struct sysc *sysc); 169 }; 170 171 static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np, 172 bool is_child); 173 static int sysc_reset(struct sysc *ddata); 174 175 static void sysc_write(struct sysc *ddata, int offset, u32 value) 176 { 177 if (ddata->cfg.quirks & SYSC_QUIRK_16BIT) { 178 writew_relaxed(value & 0xffff, ddata->module_va + offset); 179 180 /* Only i2c revision has LO and HI register with stride of 4 */ 181 if (ddata->offsets[SYSC_REVISION] >= 0 && 182 offset == ddata->offsets[SYSC_REVISION]) { 183 u16 hi = value >> 16; 184 185 writew_relaxed(hi, ddata->module_va + offset + 4); 186 } 187 188 return; 189 } 190 191 writel_relaxed(value, ddata->module_va + offset); 192 } 193 194 static u32 sysc_read(struct sysc *ddata, int offset) 195 { 196 if (ddata->cfg.quirks & SYSC_QUIRK_16BIT) { 197 u32 val; 198 199 val = readw_relaxed(ddata->module_va + offset); 200 201 /* Only i2c revision has LO and HI register with stride of 4 */ 202 if (ddata->offsets[SYSC_REVISION] >= 0 && 203 offset == ddata->offsets[SYSC_REVISION]) { 204 u16 tmp = readw_relaxed(ddata->module_va + offset + 4); 205 206 val |= tmp << 16; 207 } 208 209 return val; 210 } 211 212 return readl_relaxed(ddata->module_va + offset); 213 } 214 215 static bool sysc_opt_clks_needed(struct sysc *ddata) 216 { 217 return !!(ddata->cfg.quirks & SYSC_QUIRK_OPT_CLKS_NEEDED); 218 } 219 220 static u32 sysc_read_revision(struct sysc *ddata) 221 { 222 int offset = ddata->offsets[SYSC_REVISION]; 223 224 if (offset < 0) 225 return 0; 226 227 return sysc_read(ddata, offset); 228 } 229 230 static u32 sysc_read_sysconfig(struct sysc *ddata) 231 { 232 int offset = ddata->offsets[SYSC_SYSCONFIG]; 233 234 if (offset < 0) 235 return 0; 236 237 return sysc_read(ddata, offset); 238 } 239 240 static u32 sysc_read_sysstatus(struct sysc *ddata) 241 { 242 int offset = ddata->offsets[SYSC_SYSSTATUS]; 243 244 if (offset < 0) 245 return 0; 246 247 return sysc_read(ddata, offset); 248 } 249 250 static int sysc_poll_reset_sysstatus(struct sysc *ddata) 251 { 252 int error, retries; 253 u32 syss_done, rstval; 254 255 if (ddata->cfg.quirks & SYSS_QUIRK_RESETDONE_INVERTED) 256 syss_done = 0; 257 else 258 syss_done = ddata->cfg.syss_mask; 259 260 if (likely(!timekeeping_suspended)) { 261 error = readx_poll_timeout_atomic(sysc_read_sysstatus, ddata, 262 rstval, (rstval & ddata->cfg.syss_mask) == 263 syss_done, 100, MAX_MODULE_SOFTRESET_WAIT); 264 } else { 265 retries = MAX_MODULE_SOFTRESET_WAIT; 266 while (retries--) { 267 rstval = sysc_read_sysstatus(ddata); 268 if ((rstval & ddata->cfg.syss_mask) == syss_done) 269 return 0; 270 udelay(2); /* Account for udelay flakeyness */ 271 } 272 error = -ETIMEDOUT; 273 } 274 275 return error; 276 } 277 278 static int sysc_poll_reset_sysconfig(struct sysc *ddata) 279 { 280 int error, retries; 281 u32 sysc_mask, rstval; 282 283 sysc_mask = BIT(ddata->cap->regbits->srst_shift); 284 285 if (likely(!timekeeping_suspended)) { 286 error = readx_poll_timeout_atomic(sysc_read_sysconfig, ddata, 287 rstval, !(rstval & sysc_mask), 288 100, MAX_MODULE_SOFTRESET_WAIT); 289 } else { 290 retries = MAX_MODULE_SOFTRESET_WAIT; 291 while (retries--) { 292 rstval = sysc_read_sysconfig(ddata); 293 if (!(rstval & sysc_mask)) 294 return 0; 295 udelay(2); /* Account for udelay flakeyness */ 296 } 297 error = -ETIMEDOUT; 298 } 299 300 return error; 301 } 302 303 /* Poll on reset status */ 304 static int sysc_wait_softreset(struct sysc *ddata) 305 { 306 int syss_offset, error = 0; 307 308 if (ddata->cap->regbits->srst_shift < 0) 309 return 0; 310 311 syss_offset = ddata->offsets[SYSC_SYSSTATUS]; 312 313 if (syss_offset >= 0) 314 error = sysc_poll_reset_sysstatus(ddata); 315 else if (ddata->cfg.quirks & SYSC_QUIRK_RESET_STATUS) 316 error = sysc_poll_reset_sysconfig(ddata); 317 318 return error; 319 } 320 321 static int sysc_add_named_clock_from_child(struct sysc *ddata, 322 const char *name, 323 const char *optfck_name) 324 { 325 struct device_node *np = ddata->dev->of_node; 326 struct device_node *child; 327 struct clk_lookup *cl; 328 struct clk *clock; 329 const char *n; 330 331 if (name) 332 n = name; 333 else 334 n = optfck_name; 335 336 /* Does the clock alias already exist? */ 337 clock = of_clk_get_by_name(np, n); 338 if (!IS_ERR(clock)) { 339 clk_put(clock); 340 341 return 0; 342 } 343 344 child = of_get_next_available_child(np, NULL); 345 if (!child) 346 return -ENODEV; 347 348 clock = devm_get_clk_from_child(ddata->dev, child, name); 349 if (IS_ERR(clock)) 350 return PTR_ERR(clock); 351 352 /* 353 * Use clkdev_add() instead of clkdev_alloc() to avoid the MAX_DEV_ID 354 * limit for clk_get(). If cl ever needs to be freed, it should be done 355 * with clkdev_drop(). 356 */ 357 cl = kzalloc(sizeof(*cl), GFP_KERNEL); 358 if (!cl) 359 return -ENOMEM; 360 361 cl->con_id = n; 362 cl->dev_id = dev_name(ddata->dev); 363 cl->clk = clock; 364 clkdev_add(cl); 365 366 clk_put(clock); 367 368 return 0; 369 } 370 371 static int sysc_init_ext_opt_clock(struct sysc *ddata, const char *name) 372 { 373 const char *optfck_name; 374 int error, index; 375 376 if (ddata->nr_clocks < SYSC_OPTFCK0) 377 index = SYSC_OPTFCK0; 378 else 379 index = ddata->nr_clocks; 380 381 if (name) 382 optfck_name = name; 383 else 384 optfck_name = clock_names[index]; 385 386 error = sysc_add_named_clock_from_child(ddata, name, optfck_name); 387 if (error) 388 return error; 389 390 ddata->clock_roles[index] = optfck_name; 391 ddata->nr_clocks++; 392 393 return 0; 394 } 395 396 static int sysc_get_one_clock(struct sysc *ddata, const char *name) 397 { 398 int error, i, index = -ENODEV; 399 400 if (!strncmp(clock_names[SYSC_FCK], name, 3)) 401 index = SYSC_FCK; 402 else if (!strncmp(clock_names[SYSC_ICK], name, 3)) 403 index = SYSC_ICK; 404 405 if (index < 0) { 406 for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) { 407 if (!ddata->clocks[i]) { 408 index = i; 409 break; 410 } 411 } 412 } 413 414 if (index < 0) { 415 dev_err(ddata->dev, "clock %s not added\n", name); 416 return index; 417 } 418 419 ddata->clocks[index] = devm_clk_get(ddata->dev, name); 420 if (IS_ERR(ddata->clocks[index])) { 421 dev_err(ddata->dev, "clock get error for %s: %li\n", 422 name, PTR_ERR(ddata->clocks[index])); 423 424 return PTR_ERR(ddata->clocks[index]); 425 } 426 427 error = clk_prepare(ddata->clocks[index]); 428 if (error) { 429 dev_err(ddata->dev, "clock prepare error for %s: %i\n", 430 name, error); 431 432 return error; 433 } 434 435 return 0; 436 } 437 438 static int sysc_get_clocks(struct sysc *ddata) 439 { 440 struct device_node *np = ddata->dev->of_node; 441 struct property *prop; 442 const char *name; 443 int nr_fck = 0, nr_ick = 0, i, error = 0; 444 445 ddata->clock_roles = devm_kcalloc(ddata->dev, 446 SYSC_MAX_CLOCKS, 447 sizeof(*ddata->clock_roles), 448 GFP_KERNEL); 449 if (!ddata->clock_roles) 450 return -ENOMEM; 451 452 of_property_for_each_string(np, "clock-names", prop, name) { 453 if (!strncmp(clock_names[SYSC_FCK], name, 3)) 454 nr_fck++; 455 if (!strncmp(clock_names[SYSC_ICK], name, 3)) 456 nr_ick++; 457 ddata->clock_roles[ddata->nr_clocks] = name; 458 ddata->nr_clocks++; 459 } 460 461 if (ddata->nr_clocks < 1) 462 return 0; 463 464 if ((ddata->cfg.quirks & SYSC_QUIRK_EXT_OPT_CLOCK)) { 465 error = sysc_init_ext_opt_clock(ddata, NULL); 466 if (error) 467 return error; 468 } 469 470 if (ddata->nr_clocks > SYSC_MAX_CLOCKS) { 471 dev_err(ddata->dev, "too many clocks for %pOF\n", np); 472 473 return -EINVAL; 474 } 475 476 if (nr_fck > 1 || nr_ick > 1) { 477 dev_err(ddata->dev, "max one fck and ick for %pOF\n", np); 478 479 return -EINVAL; 480 } 481 482 /* Always add a slot for main clocks fck and ick even if unused */ 483 if (!nr_fck) 484 ddata->nr_clocks++; 485 if (!nr_ick) 486 ddata->nr_clocks++; 487 488 ddata->clocks = devm_kcalloc(ddata->dev, 489 ddata->nr_clocks, sizeof(*ddata->clocks), 490 GFP_KERNEL); 491 if (!ddata->clocks) 492 return -ENOMEM; 493 494 for (i = 0; i < SYSC_MAX_CLOCKS; i++) { 495 const char *name = ddata->clock_roles[i]; 496 497 if (!name) 498 continue; 499 500 error = sysc_get_one_clock(ddata, name); 501 if (error) 502 return error; 503 } 504 505 return 0; 506 } 507 508 static int sysc_enable_main_clocks(struct sysc *ddata) 509 { 510 struct clk *clock; 511 int i, error; 512 513 if (!ddata->clocks) 514 return 0; 515 516 for (i = 0; i < SYSC_OPTFCK0; i++) { 517 clock = ddata->clocks[i]; 518 519 /* Main clocks may not have ick */ 520 if (IS_ERR_OR_NULL(clock)) 521 continue; 522 523 error = clk_enable(clock); 524 if (error) 525 goto err_disable; 526 } 527 528 return 0; 529 530 err_disable: 531 for (i--; i >= 0; i--) { 532 clock = ddata->clocks[i]; 533 534 /* Main clocks may not have ick */ 535 if (IS_ERR_OR_NULL(clock)) 536 continue; 537 538 clk_disable(clock); 539 } 540 541 return error; 542 } 543 544 static void sysc_disable_main_clocks(struct sysc *ddata) 545 { 546 struct clk *clock; 547 int i; 548 549 if (!ddata->clocks) 550 return; 551 552 for (i = 0; i < SYSC_OPTFCK0; i++) { 553 clock = ddata->clocks[i]; 554 if (IS_ERR_OR_NULL(clock)) 555 continue; 556 557 clk_disable(clock); 558 } 559 } 560 561 static int sysc_enable_opt_clocks(struct sysc *ddata) 562 { 563 struct clk *clock; 564 int i, error; 565 566 if (!ddata->clocks || ddata->nr_clocks < SYSC_OPTFCK0 + 1) 567 return 0; 568 569 for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) { 570 clock = ddata->clocks[i]; 571 572 /* Assume no holes for opt clocks */ 573 if (IS_ERR_OR_NULL(clock)) 574 return 0; 575 576 error = clk_enable(clock); 577 if (error) 578 goto err_disable; 579 } 580 581 return 0; 582 583 err_disable: 584 for (i--; i >= 0; i--) { 585 clock = ddata->clocks[i]; 586 if (IS_ERR_OR_NULL(clock)) 587 continue; 588 589 clk_disable(clock); 590 } 591 592 return error; 593 } 594 595 static void sysc_disable_opt_clocks(struct sysc *ddata) 596 { 597 struct clk *clock; 598 int i; 599 600 if (!ddata->clocks || ddata->nr_clocks < SYSC_OPTFCK0 + 1) 601 return; 602 603 for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) { 604 clock = ddata->clocks[i]; 605 606 /* Assume no holes for opt clocks */ 607 if (IS_ERR_OR_NULL(clock)) 608 return; 609 610 clk_disable(clock); 611 } 612 } 613 614 static void sysc_clkdm_deny_idle(struct sysc *ddata) 615 { 616 struct ti_sysc_platform_data *pdata; 617 618 if (ddata->legacy_mode || (ddata->cfg.quirks & SYSC_QUIRK_CLKDM_NOAUTO)) 619 return; 620 621 pdata = dev_get_platdata(ddata->dev); 622 if (pdata && pdata->clkdm_deny_idle) 623 pdata->clkdm_deny_idle(ddata->dev, &ddata->cookie); 624 } 625 626 static void sysc_clkdm_allow_idle(struct sysc *ddata) 627 { 628 struct ti_sysc_platform_data *pdata; 629 630 if (ddata->legacy_mode || (ddata->cfg.quirks & SYSC_QUIRK_CLKDM_NOAUTO)) 631 return; 632 633 pdata = dev_get_platdata(ddata->dev); 634 if (pdata && pdata->clkdm_allow_idle) 635 pdata->clkdm_allow_idle(ddata->dev, &ddata->cookie); 636 } 637 638 /** 639 * sysc_init_resets - init rstctrl reset line if configured 640 * @ddata: device driver data 641 * 642 * See sysc_rstctrl_reset_deassert(). 643 */ 644 static int sysc_init_resets(struct sysc *ddata) 645 { 646 ddata->rsts = 647 devm_reset_control_get_optional_shared(ddata->dev, "rstctrl"); 648 649 return PTR_ERR_OR_ZERO(ddata->rsts); 650 } 651 652 /** 653 * sysc_parse_and_check_child_range - parses module IO region from ranges 654 * @ddata: device driver data 655 * 656 * In general we only need rev, syss, and sysc registers and not the whole 657 * module range. But we do want the offsets for these registers from the 658 * module base. This allows us to check them against the legacy hwmod 659 * platform data. Let's also check the ranges are configured properly. 660 */ 661 static int sysc_parse_and_check_child_range(struct sysc *ddata) 662 { 663 struct device_node *np = ddata->dev->of_node; 664 struct of_range_parser parser; 665 struct of_range range; 666 int error; 667 668 error = of_range_parser_init(&parser, np); 669 if (error) 670 return error; 671 672 for_each_of_range(&parser, &range) { 673 ddata->module_pa = range.cpu_addr; 674 ddata->module_size = range.size; 675 break; 676 } 677 678 return 0; 679 } 680 681 /* Interconnect instances to probe before l4_per instances */ 682 static struct resource early_bus_ranges[] = { 683 /* am3/4 l4_wkup */ 684 { .start = 0x44c00000, .end = 0x44c00000 + 0x300000, }, 685 /* omap4/5 and dra7 l4_cfg */ 686 { .start = 0x4a000000, .end = 0x4a000000 + 0x300000, }, 687 /* omap4 l4_wkup */ 688 { .start = 0x4a300000, .end = 0x4a300000 + 0x30000, }, 689 /* omap5 and dra7 l4_wkup without dra7 dcan segment */ 690 { .start = 0x4ae00000, .end = 0x4ae00000 + 0x30000, }, 691 }; 692 693 static atomic_t sysc_defer = ATOMIC_INIT(10); 694 695 /** 696 * sysc_defer_non_critical - defer non_critical interconnect probing 697 * @ddata: device driver data 698 * 699 * We want to probe l4_cfg and l4_wkup interconnect instances before any 700 * l4_per instances as l4_per instances depend on resources on l4_cfg and 701 * l4_wkup interconnects. 702 */ 703 static int sysc_defer_non_critical(struct sysc *ddata) 704 { 705 struct resource *res; 706 int i; 707 708 if (!atomic_read(&sysc_defer)) 709 return 0; 710 711 for (i = 0; i < ARRAY_SIZE(early_bus_ranges); i++) { 712 res = &early_bus_ranges[i]; 713 if (ddata->module_pa >= res->start && 714 ddata->module_pa <= res->end) { 715 atomic_set(&sysc_defer, 0); 716 717 return 0; 718 } 719 } 720 721 atomic_dec_if_positive(&sysc_defer); 722 723 return -EPROBE_DEFER; 724 } 725 726 static struct device_node *stdout_path; 727 728 static void sysc_init_stdout_path(struct sysc *ddata) 729 { 730 struct device_node *np = NULL; 731 const char *uart; 732 733 if (IS_ERR(stdout_path)) 734 return; 735 736 if (stdout_path) 737 return; 738 739 np = of_find_node_by_path("/chosen"); 740 if (!np) 741 goto err; 742 743 uart = of_get_property(np, "stdout-path", NULL); 744 if (!uart) 745 goto err; 746 747 np = of_find_node_by_path(uart); 748 if (!np) 749 goto err; 750 751 stdout_path = np; 752 753 return; 754 755 err: 756 stdout_path = ERR_PTR(-ENODEV); 757 } 758 759 static void sysc_check_quirk_stdout(struct sysc *ddata, 760 struct device_node *np) 761 { 762 sysc_init_stdout_path(ddata); 763 if (np != stdout_path) 764 return; 765 766 ddata->cfg.quirks |= SYSC_QUIRK_NO_IDLE_ON_INIT | 767 SYSC_QUIRK_NO_RESET_ON_INIT; 768 } 769 770 /** 771 * sysc_check_one_child - check child configuration 772 * @ddata: device driver data 773 * @np: child device node 774 * 775 * Let's avoid messy situations where we have new interconnect target 776 * node but children have "ti,hwmods". These belong to the interconnect 777 * target node and are managed by this driver. 778 */ 779 static void sysc_check_one_child(struct sysc *ddata, 780 struct device_node *np) 781 { 782 const char *name; 783 784 name = of_get_property(np, "ti,hwmods", NULL); 785 if (name && !of_device_is_compatible(np, "ti,sysc")) 786 dev_warn(ddata->dev, "really a child ti,hwmods property?"); 787 788 sysc_check_quirk_stdout(ddata, np); 789 sysc_parse_dts_quirks(ddata, np, true); 790 } 791 792 static void sysc_check_children(struct sysc *ddata) 793 { 794 struct device_node *child; 795 796 for_each_child_of_node(ddata->dev->of_node, child) 797 sysc_check_one_child(ddata, child); 798 } 799 800 /* 801 * So far only I2C uses 16-bit read access with clockactivity with revision 802 * in two registers with stride of 4. We can detect this based on the rev 803 * register size to configure things far enough to be able to properly read 804 * the revision register. 805 */ 806 static void sysc_check_quirk_16bit(struct sysc *ddata, struct resource *res) 807 { 808 if (resource_size(res) == 8) 809 ddata->cfg.quirks |= SYSC_QUIRK_16BIT | SYSC_QUIRK_USE_CLOCKACT; 810 } 811 812 /** 813 * sysc_parse_one - parses the interconnect target module registers 814 * @ddata: device driver data 815 * @reg: register to parse 816 */ 817 static int sysc_parse_one(struct sysc *ddata, enum sysc_registers reg) 818 { 819 struct resource *res; 820 const char *name; 821 822 switch (reg) { 823 case SYSC_REVISION: 824 case SYSC_SYSCONFIG: 825 case SYSC_SYSSTATUS: 826 name = reg_names[reg]; 827 break; 828 default: 829 return -EINVAL; 830 } 831 832 res = platform_get_resource_byname(to_platform_device(ddata->dev), 833 IORESOURCE_MEM, name); 834 if (!res) { 835 ddata->offsets[reg] = -ENODEV; 836 837 return 0; 838 } 839 840 ddata->offsets[reg] = res->start - ddata->module_pa; 841 if (reg == SYSC_REVISION) 842 sysc_check_quirk_16bit(ddata, res); 843 844 return 0; 845 } 846 847 static int sysc_parse_registers(struct sysc *ddata) 848 { 849 int i, error; 850 851 for (i = 0; i < SYSC_MAX_REGS; i++) { 852 error = sysc_parse_one(ddata, i); 853 if (error) 854 return error; 855 } 856 857 return 0; 858 } 859 860 /** 861 * sysc_check_registers - check for misconfigured register overlaps 862 * @ddata: device driver data 863 */ 864 static int sysc_check_registers(struct sysc *ddata) 865 { 866 int i, j, nr_regs = 0, nr_matches = 0; 867 868 for (i = 0; i < SYSC_MAX_REGS; i++) { 869 if (ddata->offsets[i] < 0) 870 continue; 871 872 if (ddata->offsets[i] > (ddata->module_size - 4)) { 873 dev_err(ddata->dev, "register outside module range"); 874 875 return -EINVAL; 876 } 877 878 for (j = 0; j < SYSC_MAX_REGS; j++) { 879 if (ddata->offsets[j] < 0) 880 continue; 881 882 if (ddata->offsets[i] == ddata->offsets[j]) 883 nr_matches++; 884 } 885 nr_regs++; 886 } 887 888 if (nr_matches > nr_regs) { 889 dev_err(ddata->dev, "overlapping registers: (%i/%i)", 890 nr_regs, nr_matches); 891 892 return -EINVAL; 893 } 894 895 return 0; 896 } 897 898 /** 899 * sysc_ioremap - ioremap register space for the interconnect target module 900 * @ddata: device driver data 901 * 902 * Note that the interconnect target module registers can be anywhere 903 * within the interconnect target module range. For example, SGX has 904 * them at offset 0x1fc00 in the 32MB module address space. And cpsw 905 * has them at offset 0x1200 in the CPSW_WR child. Usually the 906 * interconnect target module registers are at the beginning of 907 * the module range though. 908 */ 909 static int sysc_ioremap(struct sysc *ddata) 910 { 911 int size; 912 913 if (ddata->offsets[SYSC_REVISION] < 0 && 914 ddata->offsets[SYSC_SYSCONFIG] < 0 && 915 ddata->offsets[SYSC_SYSSTATUS] < 0) { 916 size = ddata->module_size; 917 } else { 918 size = max3(ddata->offsets[SYSC_REVISION], 919 ddata->offsets[SYSC_SYSCONFIG], 920 ddata->offsets[SYSC_SYSSTATUS]); 921 922 if (size < SZ_1K) 923 size = SZ_1K; 924 925 if ((size + sizeof(u32)) > ddata->module_size) 926 size = ddata->module_size; 927 } 928 929 ddata->module_va = devm_ioremap(ddata->dev, 930 ddata->module_pa, 931 size + sizeof(u32)); 932 if (!ddata->module_va) 933 return -EIO; 934 935 return 0; 936 } 937 938 /** 939 * sysc_map_and_check_registers - ioremap and check device registers 940 * @ddata: device driver data 941 */ 942 static int sysc_map_and_check_registers(struct sysc *ddata) 943 { 944 struct device_node *np = ddata->dev->of_node; 945 int error; 946 947 error = sysc_parse_and_check_child_range(ddata); 948 if (error) 949 return error; 950 951 error = sysc_defer_non_critical(ddata); 952 if (error) 953 return error; 954 955 sysc_check_children(ddata); 956 957 if (!of_property_present(np, "reg")) 958 return 0; 959 960 error = sysc_parse_registers(ddata); 961 if (error) 962 return error; 963 964 error = sysc_ioremap(ddata); 965 if (error) 966 return error; 967 968 error = sysc_check_registers(ddata); 969 if (error) 970 return error; 971 972 return 0; 973 } 974 975 /** 976 * sysc_show_rev - read and show interconnect target module revision 977 * @bufp: buffer to print the information to 978 * @ddata: device driver data 979 */ 980 static int sysc_show_rev(char *bufp, struct sysc *ddata) 981 { 982 int len; 983 984 if (ddata->offsets[SYSC_REVISION] < 0) 985 return sprintf(bufp, ":NA"); 986 987 len = sprintf(bufp, ":%08x", ddata->revision); 988 989 return len; 990 } 991 992 static int sysc_show_reg(struct sysc *ddata, 993 char *bufp, enum sysc_registers reg) 994 { 995 if (ddata->offsets[reg] < 0) 996 return sprintf(bufp, ":NA"); 997 998 return sprintf(bufp, ":%x", ddata->offsets[reg]); 999 } 1000 1001 static int sysc_show_name(char *bufp, struct sysc *ddata) 1002 { 1003 if (!ddata->name) 1004 return 0; 1005 1006 return sprintf(bufp, ":%s", ddata->name); 1007 } 1008 1009 /** 1010 * sysc_show_registers - show information about interconnect target module 1011 * @ddata: device driver data 1012 */ 1013 static void sysc_show_registers(struct sysc *ddata) 1014 { 1015 char buf[128]; 1016 char *bufp = buf; 1017 int i; 1018 1019 for (i = 0; i < SYSC_MAX_REGS; i++) 1020 bufp += sysc_show_reg(ddata, bufp, i); 1021 1022 bufp += sysc_show_rev(bufp, ddata); 1023 bufp += sysc_show_name(bufp, ddata); 1024 1025 dev_dbg(ddata->dev, "%llx:%x%s\n", 1026 ddata->module_pa, ddata->module_size, 1027 buf); 1028 } 1029 1030 /** 1031 * sysc_write_sysconfig - handle sysconfig quirks for register write 1032 * @ddata: device driver data 1033 * @value: register value 1034 */ 1035 static void sysc_write_sysconfig(struct sysc *ddata, u32 value) 1036 { 1037 if (ddata->module_unlock_quirk) 1038 ddata->module_unlock_quirk(ddata); 1039 1040 sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], value); 1041 1042 if (ddata->module_lock_quirk) 1043 ddata->module_lock_quirk(ddata); 1044 } 1045 1046 #define SYSC_IDLE_MASK (SYSC_NR_IDLEMODES - 1) 1047 #define SYSC_CLOCACT_ICK 2 1048 1049 /* Caller needs to manage sysc_clkdm_deny_idle() and sysc_clkdm_allow_idle() */ 1050 static int sysc_enable_module(struct device *dev) 1051 { 1052 struct sysc *ddata; 1053 const struct sysc_regbits *regbits; 1054 u32 reg, idlemodes, best_mode; 1055 int error; 1056 1057 ddata = dev_get_drvdata(dev); 1058 1059 /* 1060 * Some modules like DSS reset automatically on idle. Enable optional 1061 * reset clocks and wait for OCP softreset to complete. 1062 */ 1063 if (ddata->cfg.quirks & SYSC_QUIRK_OPT_CLKS_IN_RESET) { 1064 error = sysc_enable_opt_clocks(ddata); 1065 if (error) { 1066 dev_err(ddata->dev, 1067 "Optional clocks failed for enable: %i\n", 1068 error); 1069 return error; 1070 } 1071 } 1072 /* 1073 * Some modules like i2c and hdq1w have unusable reset status unless 1074 * the module reset quirk is enabled. Skip status check on enable. 1075 */ 1076 if (!(ddata->cfg.quirks & SYSC_MODULE_QUIRK_ENA_RESETDONE)) { 1077 error = sysc_wait_softreset(ddata); 1078 if (error) 1079 dev_warn(ddata->dev, "OCP softreset timed out\n"); 1080 } 1081 if (ddata->cfg.quirks & SYSC_QUIRK_OPT_CLKS_IN_RESET) 1082 sysc_disable_opt_clocks(ddata); 1083 1084 /* 1085 * Some subsystem private interconnects, like DSS top level module, 1086 * need only the automatic OCP softreset handling with no sysconfig 1087 * register bits to configure. 1088 */ 1089 if (ddata->offsets[SYSC_SYSCONFIG] == -ENODEV) 1090 return 0; 1091 1092 regbits = ddata->cap->regbits; 1093 reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]); 1094 1095 /* 1096 * Set CLOCKACTIVITY, we only use it for ick. And we only configure it 1097 * based on the SYSC_QUIRK_USE_CLOCKACT flag, not based on the hardware 1098 * capabilities. See the old HWMOD_SET_DEFAULT_CLOCKACT flag. 1099 */ 1100 if (regbits->clkact_shift >= 0 && 1101 (ddata->cfg.quirks & SYSC_QUIRK_USE_CLOCKACT)) 1102 reg |= SYSC_CLOCACT_ICK << regbits->clkact_shift; 1103 1104 /* Set SIDLE mode */ 1105 idlemodes = ddata->cfg.sidlemodes; 1106 if (!idlemodes || regbits->sidle_shift < 0) 1107 goto set_midle; 1108 1109 if (ddata->cfg.quirks & (SYSC_QUIRK_SWSUP_SIDLE | 1110 SYSC_QUIRK_SWSUP_SIDLE_ACT)) { 1111 best_mode = SYSC_IDLE_NO; 1112 1113 /* Clear WAKEUP */ 1114 if (regbits->enwkup_shift >= 0 && 1115 ddata->cfg.sysc_val & BIT(regbits->enwkup_shift)) 1116 reg &= ~BIT(regbits->enwkup_shift); 1117 } else { 1118 best_mode = fls(ddata->cfg.sidlemodes) - 1; 1119 if (best_mode > SYSC_IDLE_MASK) { 1120 dev_err(dev, "%s: invalid sidlemode\n", __func__); 1121 return -EINVAL; 1122 } 1123 1124 /* Set WAKEUP */ 1125 if (regbits->enwkup_shift >= 0 && 1126 ddata->cfg.sysc_val & BIT(regbits->enwkup_shift)) 1127 reg |= BIT(regbits->enwkup_shift); 1128 } 1129 1130 reg &= ~(SYSC_IDLE_MASK << regbits->sidle_shift); 1131 reg |= best_mode << regbits->sidle_shift; 1132 sysc_write_sysconfig(ddata, reg); 1133 1134 set_midle: 1135 /* Set MIDLE mode */ 1136 idlemodes = ddata->cfg.midlemodes; 1137 if (!idlemodes || regbits->midle_shift < 0) 1138 goto set_autoidle; 1139 1140 best_mode = fls(ddata->cfg.midlemodes) - 1; 1141 if (best_mode > SYSC_IDLE_MASK) { 1142 dev_err(dev, "%s: invalid midlemode\n", __func__); 1143 error = -EINVAL; 1144 goto save_context; 1145 } 1146 1147 if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_MSTANDBY) 1148 best_mode = SYSC_IDLE_NO; 1149 1150 reg &= ~(SYSC_IDLE_MASK << regbits->midle_shift); 1151 reg |= best_mode << regbits->midle_shift; 1152 sysc_write_sysconfig(ddata, reg); 1153 1154 set_autoidle: 1155 /* Autoidle bit must enabled separately if available */ 1156 if (regbits->autoidle_shift >= 0 && 1157 ddata->cfg.sysc_val & BIT(regbits->autoidle_shift)) { 1158 reg |= 1 << regbits->autoidle_shift; 1159 sysc_write_sysconfig(ddata, reg); 1160 } 1161 1162 error = 0; 1163 1164 save_context: 1165 /* Save context and flush posted write */ 1166 ddata->sysconfig = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]); 1167 1168 if (ddata->module_enable_quirk) 1169 ddata->module_enable_quirk(ddata); 1170 1171 return error; 1172 } 1173 1174 static int sysc_best_idle_mode(u32 idlemodes, u32 *best_mode) 1175 { 1176 if (idlemodes & BIT(SYSC_IDLE_SMART_WKUP)) 1177 *best_mode = SYSC_IDLE_SMART_WKUP; 1178 else if (idlemodes & BIT(SYSC_IDLE_SMART)) 1179 *best_mode = SYSC_IDLE_SMART; 1180 else if (idlemodes & BIT(SYSC_IDLE_FORCE)) 1181 *best_mode = SYSC_IDLE_FORCE; 1182 else 1183 return -EINVAL; 1184 1185 return 0; 1186 } 1187 1188 /* Caller needs to manage sysc_clkdm_deny_idle() and sysc_clkdm_allow_idle() */ 1189 static int sysc_disable_module(struct device *dev) 1190 { 1191 struct sysc *ddata; 1192 const struct sysc_regbits *regbits; 1193 u32 reg, idlemodes, best_mode; 1194 int ret; 1195 1196 ddata = dev_get_drvdata(dev); 1197 if (ddata->offsets[SYSC_SYSCONFIG] == -ENODEV) 1198 return 0; 1199 1200 if (ddata->module_disable_quirk) 1201 ddata->module_disable_quirk(ddata); 1202 1203 regbits = ddata->cap->regbits; 1204 reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]); 1205 1206 /* Set MIDLE mode */ 1207 idlemodes = ddata->cfg.midlemodes; 1208 if (!idlemodes || regbits->midle_shift < 0) 1209 goto set_sidle; 1210 1211 ret = sysc_best_idle_mode(idlemodes, &best_mode); 1212 if (ret) { 1213 dev_err(dev, "%s: invalid midlemode\n", __func__); 1214 return ret; 1215 } 1216 1217 if (ddata->cfg.quirks & (SYSC_QUIRK_SWSUP_MSTANDBY) || 1218 ddata->cfg.quirks & (SYSC_QUIRK_FORCE_MSTANDBY)) 1219 best_mode = SYSC_IDLE_FORCE; 1220 1221 reg &= ~(SYSC_IDLE_MASK << regbits->midle_shift); 1222 reg |= best_mode << regbits->midle_shift; 1223 sysc_write_sysconfig(ddata, reg); 1224 1225 set_sidle: 1226 /* Set SIDLE mode */ 1227 idlemodes = ddata->cfg.sidlemodes; 1228 if (!idlemodes || regbits->sidle_shift < 0) { 1229 ret = 0; 1230 goto save_context; 1231 } 1232 1233 if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_SIDLE) { 1234 best_mode = SYSC_IDLE_FORCE; 1235 } else { 1236 ret = sysc_best_idle_mode(idlemodes, &best_mode); 1237 if (ret) { 1238 dev_err(dev, "%s: invalid sidlemode\n", __func__); 1239 ret = -EINVAL; 1240 goto save_context; 1241 } 1242 } 1243 1244 if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_SIDLE_ACT) { 1245 /* Set WAKEUP */ 1246 if (regbits->enwkup_shift >= 0 && 1247 ddata->cfg.sysc_val & BIT(regbits->enwkup_shift)) 1248 reg |= BIT(regbits->enwkup_shift); 1249 } 1250 1251 reg &= ~(SYSC_IDLE_MASK << regbits->sidle_shift); 1252 reg |= best_mode << regbits->sidle_shift; 1253 if (regbits->autoidle_shift >= 0 && 1254 ddata->cfg.sysc_val & BIT(regbits->autoidle_shift)) 1255 reg |= 1 << regbits->autoidle_shift; 1256 sysc_write_sysconfig(ddata, reg); 1257 1258 ret = 0; 1259 1260 save_context: 1261 /* Save context and flush posted write */ 1262 ddata->sysconfig = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]); 1263 1264 return ret; 1265 } 1266 1267 static int __maybe_unused sysc_runtime_suspend_legacy(struct device *dev, 1268 struct sysc *ddata) 1269 { 1270 struct ti_sysc_platform_data *pdata; 1271 int error; 1272 1273 pdata = dev_get_platdata(ddata->dev); 1274 if (!pdata) 1275 return 0; 1276 1277 if (!pdata->idle_module) 1278 return -ENODEV; 1279 1280 error = pdata->idle_module(dev, &ddata->cookie); 1281 if (error) 1282 dev_err(dev, "%s: could not idle: %i\n", 1283 __func__, error); 1284 1285 reset_control_assert(ddata->rsts); 1286 1287 return 0; 1288 } 1289 1290 static int __maybe_unused sysc_runtime_resume_legacy(struct device *dev, 1291 struct sysc *ddata) 1292 { 1293 struct ti_sysc_platform_data *pdata; 1294 int error; 1295 1296 pdata = dev_get_platdata(ddata->dev); 1297 if (!pdata) 1298 return 0; 1299 1300 if (!pdata->enable_module) 1301 return -ENODEV; 1302 1303 error = pdata->enable_module(dev, &ddata->cookie); 1304 if (error) 1305 dev_err(dev, "%s: could not enable: %i\n", 1306 __func__, error); 1307 1308 reset_control_deassert(ddata->rsts); 1309 1310 return 0; 1311 } 1312 1313 static int __maybe_unused sysc_runtime_suspend(struct device *dev) 1314 { 1315 struct sysc *ddata; 1316 int error = 0; 1317 1318 ddata = dev_get_drvdata(dev); 1319 1320 if (!ddata->enabled) 1321 return 0; 1322 1323 sysc_clkdm_deny_idle(ddata); 1324 1325 if (ddata->legacy_mode) { 1326 error = sysc_runtime_suspend_legacy(dev, ddata); 1327 if (error) 1328 goto err_allow_idle; 1329 } else { 1330 error = sysc_disable_module(dev); 1331 if (error) 1332 goto err_allow_idle; 1333 } 1334 1335 sysc_disable_main_clocks(ddata); 1336 1337 if (sysc_opt_clks_needed(ddata)) 1338 sysc_disable_opt_clocks(ddata); 1339 1340 ddata->enabled = false; 1341 1342 err_allow_idle: 1343 sysc_clkdm_allow_idle(ddata); 1344 1345 reset_control_assert(ddata->rsts); 1346 1347 return error; 1348 } 1349 1350 static int __maybe_unused sysc_runtime_resume(struct device *dev) 1351 { 1352 struct sysc *ddata; 1353 int error = 0; 1354 1355 ddata = dev_get_drvdata(dev); 1356 1357 if (ddata->enabled) 1358 return 0; 1359 1360 1361 sysc_clkdm_deny_idle(ddata); 1362 1363 if (sysc_opt_clks_needed(ddata)) { 1364 error = sysc_enable_opt_clocks(ddata); 1365 if (error) 1366 goto err_allow_idle; 1367 } 1368 1369 error = sysc_enable_main_clocks(ddata); 1370 if (error) 1371 goto err_opt_clocks; 1372 1373 reset_control_deassert(ddata->rsts); 1374 1375 if (ddata->legacy_mode) { 1376 error = sysc_runtime_resume_legacy(dev, ddata); 1377 if (error) 1378 goto err_main_clocks; 1379 } else { 1380 error = sysc_enable_module(dev); 1381 if (error) 1382 goto err_main_clocks; 1383 } 1384 1385 ddata->enabled = true; 1386 1387 sysc_clkdm_allow_idle(ddata); 1388 1389 return 0; 1390 1391 err_main_clocks: 1392 sysc_disable_main_clocks(ddata); 1393 err_opt_clocks: 1394 if (sysc_opt_clks_needed(ddata)) 1395 sysc_disable_opt_clocks(ddata); 1396 err_allow_idle: 1397 sysc_clkdm_allow_idle(ddata); 1398 1399 return error; 1400 } 1401 1402 /* 1403 * Checks if device context was lost. Assumes the sysconfig register value 1404 * after lost context is different from the configured value. Only works for 1405 * enabled devices. 1406 * 1407 * Eventually we may want to also add support to using the context lost 1408 * registers that some SoCs have. 1409 */ 1410 static int sysc_check_context(struct sysc *ddata) 1411 { 1412 u32 reg; 1413 1414 if (!ddata->enabled) 1415 return -ENODATA; 1416 1417 reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]); 1418 if (reg == ddata->sysconfig) 1419 return 0; 1420 1421 return -EACCES; 1422 } 1423 1424 static int sysc_reinit_module(struct sysc *ddata, bool leave_enabled) 1425 { 1426 struct device *dev = ddata->dev; 1427 int error; 1428 1429 if (ddata->enabled) { 1430 /* Nothing to do if enabled and context not lost */ 1431 error = sysc_check_context(ddata); 1432 if (!error) 1433 return 0; 1434 1435 /* Disable target module if it is enabled */ 1436 error = sysc_runtime_suspend(dev); 1437 if (error) 1438 dev_warn(dev, "reinit suspend failed: %i\n", error); 1439 } 1440 1441 /* Enable target module */ 1442 error = sysc_runtime_resume(dev); 1443 if (error) 1444 dev_warn(dev, "reinit resume failed: %i\n", error); 1445 1446 /* Some modules like am335x gpmc need reset and restore of sysconfig */ 1447 if (ddata->cfg.quirks & SYSC_QUIRK_RESET_ON_CTX_LOST) { 1448 error = sysc_reset(ddata); 1449 if (error) 1450 dev_warn(dev, "reinit reset failed: %i\n", error); 1451 1452 sysc_write_sysconfig(ddata, ddata->sysconfig); 1453 } 1454 1455 if (leave_enabled) 1456 return error; 1457 1458 /* Disable target module if no leave_enabled was set */ 1459 error = sysc_runtime_suspend(dev); 1460 if (error) 1461 dev_warn(dev, "reinit suspend failed: %i\n", error); 1462 1463 return error; 1464 } 1465 1466 static int __maybe_unused sysc_noirq_suspend(struct device *dev) 1467 { 1468 struct sysc *ddata; 1469 1470 ddata = dev_get_drvdata(dev); 1471 1472 if (ddata->cfg.quirks & 1473 (SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_NO_IDLE)) 1474 return 0; 1475 1476 if (!ddata->enabled) 1477 return 0; 1478 1479 ddata->needs_resume = 1; 1480 1481 return sysc_runtime_suspend(dev); 1482 } 1483 1484 static int __maybe_unused sysc_noirq_resume(struct device *dev) 1485 { 1486 struct sysc *ddata; 1487 int error = 0; 1488 1489 ddata = dev_get_drvdata(dev); 1490 1491 if (ddata->cfg.quirks & 1492 (SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_NO_IDLE)) 1493 return 0; 1494 1495 if (ddata->cfg.quirks & SYSC_QUIRK_REINIT_ON_RESUME) { 1496 error = sysc_reinit_module(ddata, ddata->needs_resume); 1497 if (error) 1498 dev_warn(dev, "noirq_resume failed: %i\n", error); 1499 } else if (ddata->needs_resume) { 1500 error = sysc_runtime_resume(dev); 1501 if (error) 1502 dev_warn(dev, "noirq_resume failed: %i\n", error); 1503 } 1504 1505 ddata->needs_resume = 0; 1506 1507 return error; 1508 } 1509 1510 static const struct dev_pm_ops sysc_pm_ops = { 1511 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_noirq_suspend, sysc_noirq_resume) 1512 SET_RUNTIME_PM_OPS(sysc_runtime_suspend, 1513 sysc_runtime_resume, 1514 NULL) 1515 }; 1516 1517 /* Module revision register based quirks */ 1518 struct sysc_revision_quirk { 1519 const char *name; 1520 u32 base; 1521 int rev_offset; 1522 int sysc_offset; 1523 int syss_offset; 1524 u32 revision; 1525 u32 revision_mask; 1526 u32 quirks; 1527 }; 1528 1529 #define SYSC_QUIRK(optname, optbase, optrev, optsysc, optsyss, \ 1530 optrev_val, optrevmask, optquirkmask) \ 1531 { \ 1532 .name = (optname), \ 1533 .base = (optbase), \ 1534 .rev_offset = (optrev), \ 1535 .sysc_offset = (optsysc), \ 1536 .syss_offset = (optsyss), \ 1537 .revision = (optrev_val), \ 1538 .revision_mask = (optrevmask), \ 1539 .quirks = (optquirkmask), \ 1540 } 1541 1542 static const struct sysc_revision_quirk sysc_revision_quirks[] = { 1543 /* Quirks that need to be set based on the module address */ 1544 SYSC_QUIRK("mcpdm", 0x40132000, 0, 0x10, -ENODEV, 0x50000800, 0xffffffff, 1545 SYSC_QUIRK_EXT_OPT_CLOCK | SYSC_QUIRK_NO_RESET_ON_INIT | 1546 SYSC_QUIRK_SWSUP_SIDLE), 1547 1548 /* Quirks that need to be set based on detected module */ 1549 SYSC_QUIRK("aess", 0, 0, 0x10, -ENODEV, 0x40000000, 0xffffffff, 1550 SYSC_MODULE_QUIRK_AESS), 1551 /* Errata i893 handling for dra7 dcan1 and 2 */ 1552 SYSC_QUIRK("dcan", 0x4ae3c000, 0x20, -ENODEV, -ENODEV, 0xa3170504, 0xffffffff, 1553 SYSC_QUIRK_CLKDM_NOAUTO), 1554 SYSC_QUIRK("dcan", 0x48480000, 0x20, -ENODEV, -ENODEV, 0xa3170504, 0xffffffff, 1555 SYSC_QUIRK_CLKDM_NOAUTO), 1556 SYSC_QUIRK("dss", 0x4832a000, 0, 0x10, 0x14, 0x00000020, 0xffffffff, 1557 SYSC_QUIRK_OPT_CLKS_IN_RESET | SYSC_MODULE_QUIRK_DSS_RESET), 1558 SYSC_QUIRK("dss", 0x58000000, 0, -ENODEV, 0x14, 0x00000040, 0xffffffff, 1559 SYSC_QUIRK_OPT_CLKS_IN_RESET | SYSC_MODULE_QUIRK_DSS_RESET), 1560 SYSC_QUIRK("dss", 0x58000000, 0, -ENODEV, 0x14, 0x00000061, 0xffffffff, 1561 SYSC_QUIRK_OPT_CLKS_IN_RESET | SYSC_MODULE_QUIRK_DSS_RESET), 1562 SYSC_QUIRK("dwc3", 0x48880000, 0, 0x10, -ENODEV, 0x500a0200, 0xffffffff, 1563 SYSC_QUIRK_CLKDM_NOAUTO), 1564 SYSC_QUIRK("dwc3", 0x488c0000, 0, 0x10, -ENODEV, 0x500a0200, 0xffffffff, 1565 SYSC_QUIRK_CLKDM_NOAUTO), 1566 SYSC_QUIRK("gpio", 0, 0, 0x10, 0x114, 0x50600801, 0xffff00ff, 1567 SYSC_QUIRK_OPT_CLKS_IN_RESET), 1568 SYSC_QUIRK("gpmc", 0, 0, 0x10, 0x14, 0x00000060, 0xffffffff, 1569 SYSC_QUIRK_REINIT_ON_CTX_LOST | SYSC_QUIRK_RESET_ON_CTX_LOST | 1570 SYSC_QUIRK_GPMC_DEBUG), 1571 SYSC_QUIRK("hdmi", 0, 0, 0x10, -ENODEV, 0x50030200, 0xffffffff, 1572 SYSC_QUIRK_OPT_CLKS_NEEDED), 1573 SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x00000006, 0xffffffff, 1574 SYSC_MODULE_QUIRK_HDQ1W | SYSC_MODULE_QUIRK_ENA_RESETDONE), 1575 SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x0000000a, 0xffffffff, 1576 SYSC_MODULE_QUIRK_HDQ1W | SYSC_MODULE_QUIRK_ENA_RESETDONE), 1577 SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x00000036, 0x000000ff, 1578 SYSC_MODULE_QUIRK_I2C | SYSC_MODULE_QUIRK_ENA_RESETDONE), 1579 SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x0000003c, 0x000000ff, 1580 SYSC_MODULE_QUIRK_I2C | SYSC_MODULE_QUIRK_ENA_RESETDONE), 1581 SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x00000040, 0x000000ff, 1582 SYSC_MODULE_QUIRK_I2C | SYSC_MODULE_QUIRK_ENA_RESETDONE), 1583 SYSC_QUIRK("i2c", 0, 0, 0x10, 0x90, 0x5040000a, 0xfffff0f0, 1584 SYSC_MODULE_QUIRK_I2C | SYSC_MODULE_QUIRK_ENA_RESETDONE), 1585 SYSC_QUIRK("gpu", 0x50000000, 0x14, -ENODEV, -ENODEV, 0x00010201, 0xffffffff, 0), 1586 SYSC_QUIRK("gpu", 0x50000000, 0xfe00, 0xfe10, -ENODEV, 0x40000000 , 0xffffffff, 1587 SYSC_MODULE_QUIRK_SGX), 1588 SYSC_QUIRK("lcdc", 0, 0, 0x54, -ENODEV, 0x4f201000, 0xffffffff, 1589 SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY), 1590 SYSC_QUIRK("mcasp", 0, 0, 0x4, -ENODEV, 0x44306302, 0xffffffff, 1591 SYSC_QUIRK_SWSUP_SIDLE), 1592 SYSC_QUIRK("rtc", 0, 0x74, 0x78, -ENODEV, 0x4eb01908, 0xffff00f0, 1593 SYSC_MODULE_QUIRK_RTC_UNLOCK), 1594 SYSC_QUIRK("tptc", 0, 0, 0x10, -ENODEV, 0x40006c00, 0xffffefff, 1595 SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY), 1596 SYSC_QUIRK("tptc", 0, 0, -ENODEV, -ENODEV, 0x40007c00, 0xffffffff, 1597 SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY), 1598 SYSC_QUIRK("sata", 0, 0xfc, 0x1100, -ENODEV, 0x5e412000, 0xffffffff, 1599 SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY), 1600 SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000046, 0xffffffff, 1601 SYSC_QUIRK_SWSUP_SIDLE_ACT), 1602 SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000052, 0xffffffff, 1603 SYSC_QUIRK_SWSUP_SIDLE_ACT), 1604 /* Uarts on omap4 and later */ 1605 SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x50411e03, 0xffff00ff, 1606 SYSC_QUIRK_SWSUP_SIDLE_ACT), 1607 SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x47422e03, 0xffffffff, 1608 SYSC_QUIRK_SWSUP_SIDLE_ACT), 1609 SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x47424e03, 0xffffffff, 1610 SYSC_QUIRK_SWSUP_SIDLE_ACT), 1611 SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, 0x14, 0x50700100, 0xffffffff, 1612 SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY), 1613 SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, -ENODEV, 0x50700101, 0xffffffff, 1614 SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY), 1615 SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000033, 1616 0xffffffff, SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY | 1617 SYSC_MODULE_QUIRK_OTG), 1618 SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000040, 1619 0xffffffff, SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY | 1620 SYSC_MODULE_QUIRK_OTG), 1621 SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000050, 1622 0xffffffff, SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY | 1623 SYSC_MODULE_QUIRK_OTG), 1624 SYSC_QUIRK("usb_otg_hs", 0, 0, 0x10, -ENODEV, 0x4ea2080d, 0xffffffff, 1625 SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY | 1626 SYSC_QUIRK_REINIT_ON_CTX_LOST), 1627 SYSC_QUIRK("wdt", 0, 0, 0x10, 0x14, 0x502a0500, 0xfffff0f0, 1628 SYSC_MODULE_QUIRK_WDT), 1629 /* PRUSS on am3, am4 and am5 */ 1630 SYSC_QUIRK("pruss", 0, 0x26000, 0x26004, -ENODEV, 0x47000000, 0xff000000, 1631 SYSC_MODULE_QUIRK_PRUSS), 1632 /* Watchdog on am3 and am4 */ 1633 SYSC_QUIRK("wdt", 0x44e35000, 0, 0x10, 0x14, 0x502a0500, 0xfffff0f0, 1634 SYSC_MODULE_QUIRK_WDT | SYSC_QUIRK_SWSUP_SIDLE), 1635 1636 #ifdef DEBUG 1637 SYSC_QUIRK("adc", 0, 0, 0x10, -ENODEV, 0x47300001, 0xffffffff, 0), 1638 SYSC_QUIRK("atl", 0, 0, -ENODEV, -ENODEV, 0x0a070100, 0xffffffff, 0), 1639 SYSC_QUIRK("cm", 0, 0, -ENODEV, -ENODEV, 0x40000301, 0xffffffff, 0), 1640 SYSC_QUIRK("control", 0, 0, 0x10, -ENODEV, 0x40000900, 0xffffffff, 0), 1641 SYSC_QUIRK("cpgmac", 0, 0x1200, 0x1208, 0x1204, 0x4edb1902, 1642 0xffff00f0, 0), 1643 SYSC_QUIRK("dcan", 0, 0x20, -ENODEV, -ENODEV, 0xa3170504, 0xffffffff, 0), 1644 SYSC_QUIRK("dcan", 0, 0x20, -ENODEV, -ENODEV, 0x4edb1902, 0xffffffff, 0), 1645 SYSC_QUIRK("dispc", 0x4832a400, 0, 0x10, 0x14, 0x00000030, 0xffffffff, 0), 1646 SYSC_QUIRK("dispc", 0x58001000, 0, 0x10, 0x14, 0x00000040, 0xffffffff, 0), 1647 SYSC_QUIRK("dispc", 0x58001000, 0, 0x10, 0x14, 0x00000051, 0xffffffff, 0), 1648 SYSC_QUIRK("dmic", 0, 0, 0x10, -ENODEV, 0x50010000, 0xffffffff, 0), 1649 SYSC_QUIRK("dsi", 0x58004000, 0, 0x10, 0x14, 0x00000030, 0xffffffff, 0), 1650 SYSC_QUIRK("dsi", 0x58005000, 0, 0x10, 0x14, 0x00000030, 0xffffffff, 0), 1651 SYSC_QUIRK("dsi", 0x58005000, 0, 0x10, 0x14, 0x00000040, 0xffffffff, 0), 1652 SYSC_QUIRK("dsi", 0x58009000, 0, 0x10, 0x14, 0x00000040, 0xffffffff, 0), 1653 SYSC_QUIRK("dwc3", 0, 0, 0x10, -ENODEV, 0x500a0200, 0xffffffff, 0), 1654 SYSC_QUIRK("d2d", 0x4a0b6000, 0, 0x10, 0x14, 0x00000010, 0xffffffff, 0), 1655 SYSC_QUIRK("d2d", 0x4a0cd000, 0, 0x10, 0x14, 0x00000010, 0xffffffff, 0), 1656 SYSC_QUIRK("elm", 0x48080000, 0, 0x10, 0x14, 0x00000020, 0xffffffff, 0), 1657 SYSC_QUIRK("emif", 0, 0, -ENODEV, -ENODEV, 0x40441403, 0xffff0fff, 0), 1658 SYSC_QUIRK("emif", 0, 0, -ENODEV, -ENODEV, 0x50440500, 0xffffffff, 0), 1659 SYSC_QUIRK("epwmss", 0, 0, 0x4, -ENODEV, 0x47400001, 0xffffffff, 0), 1660 SYSC_QUIRK("gpu", 0, 0x1fc00, 0x1fc10, -ENODEV, 0, 0, 0), 1661 SYSC_QUIRK("gpu", 0, 0xfe00, 0xfe10, -ENODEV, 0x40000000 , 0xffffffff, 0), 1662 SYSC_QUIRK("hdmi", 0, 0, 0x10, -ENODEV, 0x50031d00, 0xffffffff, 0), 1663 SYSC_QUIRK("hsi", 0, 0, 0x10, 0x14, 0x50043101, 0xffffffff, 0), 1664 SYSC_QUIRK("iss", 0, 0, 0x10, -ENODEV, 0x40000101, 0xffffffff, 0), 1665 SYSC_QUIRK("keypad", 0x4a31c000, 0, 0x10, 0x14, 0x00000020, 0xffffffff, 0), 1666 SYSC_QUIRK("mcasp", 0, 0, 0x4, -ENODEV, 0x44307b02, 0xffffffff, 0), 1667 SYSC_QUIRK("mcbsp", 0, -ENODEV, 0x8c, -ENODEV, 0, 0, 0), 1668 SYSC_QUIRK("mcspi", 0, 0, 0x10, -ENODEV, 0x40300a0b, 0xffff00ff, 0), 1669 SYSC_QUIRK("mcspi", 0, 0, 0x110, 0x114, 0x40300a0b, 0xffffffff, 0), 1670 SYSC_QUIRK("mailbox", 0, 0, 0x10, -ENODEV, 0x00000400, 0xffffffff, 0), 1671 SYSC_QUIRK("m3", 0, 0, -ENODEV, -ENODEV, 0x5f580105, 0x0fff0f00, 0), 1672 SYSC_QUIRK("ocp2scp", 0, 0, 0x10, 0x14, 0x50060005, 0xfffffff0, 0), 1673 SYSC_QUIRK("ocp2scp", 0, 0, -ENODEV, -ENODEV, 0x50060007, 0xffffffff, 0), 1674 SYSC_QUIRK("padconf", 0, 0, 0x10, -ENODEV, 0x4fff0800, 0xffffffff, 0), 1675 SYSC_QUIRK("padconf", 0, 0, -ENODEV, -ENODEV, 0x40001100, 0xffffffff, 0), 1676 SYSC_QUIRK("pcie", 0x51000000, -ENODEV, -ENODEV, -ENODEV, 0, 0, 0), 1677 SYSC_QUIRK("pcie", 0x51800000, -ENODEV, -ENODEV, -ENODEV, 0, 0, 0), 1678 SYSC_QUIRK("prcm", 0, 0, -ENODEV, -ENODEV, 0x40000100, 0xffffffff, 0), 1679 SYSC_QUIRK("prcm", 0, 0, -ENODEV, -ENODEV, 0x00004102, 0xffffffff, 0), 1680 SYSC_QUIRK("prcm", 0, 0, -ENODEV, -ENODEV, 0x40000400, 0xffffffff, 0), 1681 SYSC_QUIRK("rfbi", 0x4832a800, 0, 0x10, 0x14, 0x00000010, 0xffffffff, 0), 1682 SYSC_QUIRK("rfbi", 0x58002000, 0, 0x10, 0x14, 0x00000010, 0xffffffff, 0), 1683 SYSC_QUIRK("scm", 0, 0, 0x10, -ENODEV, 0x40000900, 0xffffffff, 0), 1684 SYSC_QUIRK("scm", 0, 0, -ENODEV, -ENODEV, 0x4e8b0100, 0xffffffff, 0), 1685 SYSC_QUIRK("scm", 0, 0, -ENODEV, -ENODEV, 0x4f000100, 0xffffffff, 0), 1686 SYSC_QUIRK("scm", 0, 0, -ENODEV, -ENODEV, 0x40000900, 0xffffffff, 0), 1687 SYSC_QUIRK("scrm", 0, 0, -ENODEV, -ENODEV, 0x00000010, 0xffffffff, 0), 1688 SYSC_QUIRK("sdio", 0, 0, 0x10, -ENODEV, 0x40202301, 0xffff0ff0, 0), 1689 SYSC_QUIRK("sdio", 0, 0x2fc, 0x110, 0x114, 0x31010000, 0xffffffff, 0), 1690 SYSC_QUIRK("sdma", 0, 0, 0x2c, 0x28, 0x00010900, 0xffffffff, 0), 1691 SYSC_QUIRK("sham", 0, 0x100, 0x110, 0x114, 0x40000c03, 0xffffffff, 0), 1692 SYSC_QUIRK("slimbus", 0, 0, 0x10, -ENODEV, 0x40000902, 0xffffffff, 0), 1693 SYSC_QUIRK("slimbus", 0, 0, 0x10, -ENODEV, 0x40002903, 0xffffffff, 0), 1694 SYSC_QUIRK("smartreflex", 0, -ENODEV, 0x24, -ENODEV, 0x00000000, 0xffffffff, 0), 1695 SYSC_QUIRK("smartreflex", 0, -ENODEV, 0x38, -ENODEV, 0x00000000, 0xffffffff, 0), 1696 SYSC_QUIRK("spinlock", 0, 0, 0x10, -ENODEV, 0x50020000, 0xffffffff, 0), 1697 SYSC_QUIRK("rng", 0, 0x1fe0, 0x1fe4, -ENODEV, 0x00000020, 0xffffffff, 0), 1698 SYSC_QUIRK("timer", 0, 0, 0x10, 0x14, 0x00000013, 0xffffffff, 0), 1699 SYSC_QUIRK("timer", 0, 0, 0x10, 0x14, 0x00000015, 0xffffffff, 0), 1700 /* Some timers on omap4 and later */ 1701 SYSC_QUIRK("timer", 0, 0, 0x10, -ENODEV, 0x50002100, 0xffffffff, 0), 1702 SYSC_QUIRK("timer", 0, 0, 0x10, -ENODEV, 0x4fff1301, 0xffff00ff, 0), 1703 SYSC_QUIRK("timer32k", 0, 0, 0x4, -ENODEV, 0x00000040, 0xffffffff, 0), 1704 SYSC_QUIRK("timer32k", 0, 0, 0x4, -ENODEV, 0x00000011, 0xffffffff, 0), 1705 SYSC_QUIRK("timer32k", 0, 0, 0x4, -ENODEV, 0x00000060, 0xffffffff, 0), 1706 SYSC_QUIRK("tpcc", 0, 0, -ENODEV, -ENODEV, 0x40014c00, 0xffffffff, 0), 1707 SYSC_QUIRK("usbhstll", 0, 0, 0x10, 0x14, 0x00000004, 0xffffffff, 0), 1708 SYSC_QUIRK("usbhstll", 0, 0, 0x10, 0x14, 0x00000008, 0xffffffff, 0), 1709 SYSC_QUIRK("venc", 0x58003000, 0, -ENODEV, -ENODEV, 0x00000002, 0xffffffff, 0), 1710 SYSC_QUIRK("vfpe", 0, 0, 0x104, -ENODEV, 0x4d001200, 0xffffffff, 0), 1711 #endif 1712 }; 1713 1714 /* 1715 * Early quirks based on module base and register offsets only that are 1716 * needed before the module revision can be read 1717 */ 1718 static void sysc_init_early_quirks(struct sysc *ddata) 1719 { 1720 const struct sysc_revision_quirk *q; 1721 int i; 1722 1723 for (i = 0; i < ARRAY_SIZE(sysc_revision_quirks); i++) { 1724 q = &sysc_revision_quirks[i]; 1725 1726 if (!q->base) 1727 continue; 1728 1729 if (q->base != ddata->module_pa) 1730 continue; 1731 1732 if (q->rev_offset != ddata->offsets[SYSC_REVISION]) 1733 continue; 1734 1735 if (q->sysc_offset != ddata->offsets[SYSC_SYSCONFIG]) 1736 continue; 1737 1738 if (q->syss_offset != ddata->offsets[SYSC_SYSSTATUS]) 1739 continue; 1740 1741 ddata->name = q->name; 1742 ddata->cfg.quirks |= q->quirks; 1743 } 1744 } 1745 1746 /* Quirks that also consider the revision register value */ 1747 static void sysc_init_revision_quirks(struct sysc *ddata) 1748 { 1749 const struct sysc_revision_quirk *q; 1750 int i; 1751 1752 for (i = 0; i < ARRAY_SIZE(sysc_revision_quirks); i++) { 1753 q = &sysc_revision_quirks[i]; 1754 1755 if (q->base && q->base != ddata->module_pa) 1756 continue; 1757 1758 if (q->rev_offset != ddata->offsets[SYSC_REVISION]) 1759 continue; 1760 1761 if (q->sysc_offset != ddata->offsets[SYSC_SYSCONFIG]) 1762 continue; 1763 1764 if (q->syss_offset != ddata->offsets[SYSC_SYSSTATUS]) 1765 continue; 1766 1767 if (q->revision == ddata->revision || 1768 (q->revision & q->revision_mask) == 1769 (ddata->revision & q->revision_mask)) { 1770 ddata->name = q->name; 1771 ddata->cfg.quirks |= q->quirks; 1772 } 1773 } 1774 } 1775 1776 /* 1777 * DSS needs dispc outputs disabled to reset modules. Returns mask of 1778 * enabled DSS interrupts. Eventually we may be able to do this on 1779 * dispc init rather than top-level DSS init. 1780 */ 1781 static u32 sysc_quirk_dispc(struct sysc *ddata, int dispc_offset, 1782 bool disable) 1783 { 1784 bool lcd_en, digit_en, lcd2_en = false, lcd3_en = false; 1785 const int lcd_en_mask = BIT(0), digit_en_mask = BIT(1); 1786 int manager_count; 1787 bool framedonetv_irq = true; 1788 u32 val, irq_mask = 0; 1789 1790 switch (sysc_soc->soc) { 1791 case SOC_2420 ... SOC_3630: 1792 manager_count = 2; 1793 framedonetv_irq = false; 1794 break; 1795 case SOC_4430 ... SOC_4470: 1796 manager_count = 3; 1797 break; 1798 case SOC_5430: 1799 case SOC_DRA7: 1800 manager_count = 4; 1801 break; 1802 case SOC_AM4: 1803 manager_count = 1; 1804 framedonetv_irq = false; 1805 break; 1806 case SOC_UNKNOWN: 1807 default: 1808 return 0; 1809 } 1810 1811 /* Remap the whole module range to be able to reset dispc outputs */ 1812 devm_iounmap(ddata->dev, ddata->module_va); 1813 ddata->module_va = devm_ioremap(ddata->dev, 1814 ddata->module_pa, 1815 ddata->module_size); 1816 if (!ddata->module_va) 1817 return -EIO; 1818 1819 /* DISP_CONTROL, shut down lcd and digit on disable if enabled */ 1820 val = sysc_read(ddata, dispc_offset + 0x40); 1821 lcd_en = val & lcd_en_mask; 1822 digit_en = val & digit_en_mask; 1823 if (lcd_en) 1824 irq_mask |= BIT(0); /* FRAMEDONE */ 1825 if (digit_en) { 1826 if (framedonetv_irq) 1827 irq_mask |= BIT(24); /* FRAMEDONETV */ 1828 else 1829 irq_mask |= BIT(2) | BIT(3); /* EVSYNC bits */ 1830 } 1831 if (disable && (lcd_en || digit_en)) 1832 sysc_write(ddata, dispc_offset + 0x40, 1833 val & ~(lcd_en_mask | digit_en_mask)); 1834 1835 if (manager_count <= 2) 1836 return irq_mask; 1837 1838 /* DISPC_CONTROL2 */ 1839 val = sysc_read(ddata, dispc_offset + 0x238); 1840 lcd2_en = val & lcd_en_mask; 1841 if (lcd2_en) 1842 irq_mask |= BIT(22); /* FRAMEDONE2 */ 1843 if (disable && lcd2_en) 1844 sysc_write(ddata, dispc_offset + 0x238, 1845 val & ~lcd_en_mask); 1846 1847 if (manager_count <= 3) 1848 return irq_mask; 1849 1850 /* DISPC_CONTROL3 */ 1851 val = sysc_read(ddata, dispc_offset + 0x848); 1852 lcd3_en = val & lcd_en_mask; 1853 if (lcd3_en) 1854 irq_mask |= BIT(30); /* FRAMEDONE3 */ 1855 if (disable && lcd3_en) 1856 sysc_write(ddata, dispc_offset + 0x848, 1857 val & ~lcd_en_mask); 1858 1859 return irq_mask; 1860 } 1861 1862 /* DSS needs child outputs disabled and SDI registers cleared for reset */ 1863 static void sysc_pre_reset_quirk_dss(struct sysc *ddata) 1864 { 1865 const int dispc_offset = 0x1000; 1866 int error; 1867 u32 irq_mask, val; 1868 1869 /* Get enabled outputs */ 1870 irq_mask = sysc_quirk_dispc(ddata, dispc_offset, false); 1871 if (!irq_mask) 1872 return; 1873 1874 /* Clear IRQSTATUS */ 1875 sysc_write(ddata, dispc_offset + 0x18, irq_mask); 1876 1877 /* Disable outputs */ 1878 val = sysc_quirk_dispc(ddata, dispc_offset, true); 1879 1880 /* Poll IRQSTATUS */ 1881 error = readl_poll_timeout(ddata->module_va + dispc_offset + 0x18, 1882 val, val != irq_mask, 100, 50); 1883 if (error) 1884 dev_warn(ddata->dev, "%s: timed out %08x !+ %08x\n", 1885 __func__, val, irq_mask); 1886 1887 if (sysc_soc->soc == SOC_3430 || sysc_soc->soc == SOC_AM35) { 1888 /* Clear DSS_SDI_CONTROL */ 1889 sysc_write(ddata, 0x44, 0); 1890 1891 /* Clear DSS_PLL_CONTROL */ 1892 sysc_write(ddata, 0x48, 0); 1893 } 1894 1895 /* Clear DSS_CONTROL to switch DSS clock sources to PRCM if not */ 1896 sysc_write(ddata, 0x40, 0); 1897 } 1898 1899 /* 1-wire needs module's internal clocks enabled for reset */ 1900 static void sysc_pre_reset_quirk_hdq1w(struct sysc *ddata) 1901 { 1902 int offset = 0x0c; /* HDQ_CTRL_STATUS */ 1903 u16 val; 1904 1905 val = sysc_read(ddata, offset); 1906 val |= BIT(5); 1907 sysc_write(ddata, offset, val); 1908 } 1909 1910 /* AESS (Audio Engine SubSystem) needs autogating set after enable */ 1911 static void sysc_module_enable_quirk_aess(struct sysc *ddata) 1912 { 1913 int offset = 0x7c; /* AESS_AUTO_GATING_ENABLE */ 1914 1915 sysc_write(ddata, offset, 1); 1916 } 1917 1918 /* I2C needs to be disabled for reset */ 1919 static void sysc_clk_quirk_i2c(struct sysc *ddata, bool enable) 1920 { 1921 int offset; 1922 u16 val; 1923 1924 /* I2C_CON, omap2/3 is different from omap4 and later */ 1925 if ((ddata->revision & 0xffffff00) == 0x001f0000) 1926 offset = 0x24; 1927 else 1928 offset = 0xa4; 1929 1930 /* I2C_EN */ 1931 val = sysc_read(ddata, offset); 1932 if (enable) 1933 val |= BIT(15); 1934 else 1935 val &= ~BIT(15); 1936 sysc_write(ddata, offset, val); 1937 } 1938 1939 static void sysc_pre_reset_quirk_i2c(struct sysc *ddata) 1940 { 1941 sysc_clk_quirk_i2c(ddata, false); 1942 } 1943 1944 static void sysc_post_reset_quirk_i2c(struct sysc *ddata) 1945 { 1946 sysc_clk_quirk_i2c(ddata, true); 1947 } 1948 1949 /* RTC on am3 and 4 needs to be unlocked and locked for sysconfig */ 1950 static void sysc_quirk_rtc(struct sysc *ddata, bool lock) 1951 { 1952 u32 val, kick0_val = 0, kick1_val = 0; 1953 unsigned long flags; 1954 int error; 1955 1956 if (!lock) { 1957 kick0_val = 0x83e70b13; 1958 kick1_val = 0x95a4f1e0; 1959 } 1960 1961 local_irq_save(flags); 1962 /* RTC_STATUS BUSY bit may stay active for 1/32768 seconds (~30 usec) */ 1963 error = readl_poll_timeout_atomic(ddata->module_va + 0x44, val, 1964 !(val & BIT(0)), 100, 50); 1965 if (error) 1966 dev_warn(ddata->dev, "rtc busy timeout\n"); 1967 /* Now we have ~15 microseconds to read/write various registers */ 1968 sysc_write(ddata, 0x6c, kick0_val); 1969 sysc_write(ddata, 0x70, kick1_val); 1970 local_irq_restore(flags); 1971 } 1972 1973 static void sysc_module_unlock_quirk_rtc(struct sysc *ddata) 1974 { 1975 sysc_quirk_rtc(ddata, false); 1976 } 1977 1978 static void sysc_module_lock_quirk_rtc(struct sysc *ddata) 1979 { 1980 sysc_quirk_rtc(ddata, true); 1981 } 1982 1983 /* OTG omap2430 glue layer up to omap4 needs OTG_FORCESTDBY configured */ 1984 static void sysc_module_enable_quirk_otg(struct sysc *ddata) 1985 { 1986 int offset = 0x414; /* OTG_FORCESTDBY */ 1987 1988 sysc_write(ddata, offset, 0); 1989 } 1990 1991 static void sysc_module_disable_quirk_otg(struct sysc *ddata) 1992 { 1993 int offset = 0x414; /* OTG_FORCESTDBY */ 1994 u32 val = BIT(0); /* ENABLEFORCE */ 1995 1996 sysc_write(ddata, offset, val); 1997 } 1998 1999 /* 36xx SGX needs a quirk for to bypass OCP IPG interrupt logic */ 2000 static void sysc_module_enable_quirk_sgx(struct sysc *ddata) 2001 { 2002 int offset = 0xff08; /* OCP_DEBUG_CONFIG */ 2003 u32 val = BIT(31); /* THALIA_INT_BYPASS */ 2004 2005 sysc_write(ddata, offset, val); 2006 } 2007 2008 /* Watchdog timer needs a disable sequence after reset */ 2009 static void sysc_reset_done_quirk_wdt(struct sysc *ddata) 2010 { 2011 int wps, spr, error; 2012 u32 val; 2013 2014 wps = 0x34; 2015 spr = 0x48; 2016 2017 sysc_write(ddata, spr, 0xaaaa); 2018 error = readl_poll_timeout(ddata->module_va + wps, val, 2019 !(val & 0x10), 100, 2020 MAX_MODULE_SOFTRESET_WAIT); 2021 if (error) 2022 dev_warn(ddata->dev, "wdt disable step1 failed\n"); 2023 2024 sysc_write(ddata, spr, 0x5555); 2025 error = readl_poll_timeout(ddata->module_va + wps, val, 2026 !(val & 0x10), 100, 2027 MAX_MODULE_SOFTRESET_WAIT); 2028 if (error) 2029 dev_warn(ddata->dev, "wdt disable step2 failed\n"); 2030 } 2031 2032 /* PRUSS needs to set MSTANDBY_INIT inorder to idle properly */ 2033 static void sysc_module_disable_quirk_pruss(struct sysc *ddata) 2034 { 2035 u32 reg; 2036 2037 reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]); 2038 reg |= SYSC_PRUSS_STANDBY_INIT; 2039 sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg); 2040 } 2041 2042 static void sysc_init_module_quirks(struct sysc *ddata) 2043 { 2044 if (ddata->legacy_mode || !ddata->name) 2045 return; 2046 2047 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_HDQ1W) { 2048 ddata->pre_reset_quirk = sysc_pre_reset_quirk_hdq1w; 2049 2050 return; 2051 } 2052 2053 #ifdef CONFIG_OMAP_GPMC_DEBUG 2054 if (ddata->cfg.quirks & SYSC_QUIRK_GPMC_DEBUG) { 2055 ddata->cfg.quirks |= SYSC_QUIRK_NO_RESET_ON_INIT; 2056 2057 return; 2058 } 2059 #endif 2060 2061 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_I2C) { 2062 ddata->pre_reset_quirk = sysc_pre_reset_quirk_i2c; 2063 ddata->post_reset_quirk = sysc_post_reset_quirk_i2c; 2064 2065 return; 2066 } 2067 2068 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_AESS) 2069 ddata->module_enable_quirk = sysc_module_enable_quirk_aess; 2070 2071 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_DSS_RESET) 2072 ddata->pre_reset_quirk = sysc_pre_reset_quirk_dss; 2073 2074 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_RTC_UNLOCK) { 2075 ddata->module_unlock_quirk = sysc_module_unlock_quirk_rtc; 2076 ddata->module_lock_quirk = sysc_module_lock_quirk_rtc; 2077 2078 return; 2079 } 2080 2081 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_OTG) { 2082 ddata->module_enable_quirk = sysc_module_enable_quirk_otg; 2083 ddata->module_disable_quirk = sysc_module_disable_quirk_otg; 2084 } 2085 2086 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_SGX) 2087 ddata->module_enable_quirk = sysc_module_enable_quirk_sgx; 2088 2089 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_WDT) { 2090 ddata->reset_done_quirk = sysc_reset_done_quirk_wdt; 2091 ddata->module_disable_quirk = sysc_reset_done_quirk_wdt; 2092 } 2093 2094 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_PRUSS) 2095 ddata->module_disable_quirk = sysc_module_disable_quirk_pruss; 2096 } 2097 2098 static int sysc_clockdomain_init(struct sysc *ddata) 2099 { 2100 struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev); 2101 struct clk *fck = NULL, *ick = NULL; 2102 int error; 2103 2104 if (!pdata || !pdata->init_clockdomain) 2105 return 0; 2106 2107 switch (ddata->nr_clocks) { 2108 case 2: 2109 ick = ddata->clocks[SYSC_ICK]; 2110 fallthrough; 2111 case 1: 2112 fck = ddata->clocks[SYSC_FCK]; 2113 break; 2114 case 0: 2115 return 0; 2116 } 2117 2118 error = pdata->init_clockdomain(ddata->dev, fck, ick, &ddata->cookie); 2119 if (!error || error == -ENODEV) 2120 return 0; 2121 2122 return error; 2123 } 2124 2125 /* 2126 * Note that pdata->init_module() typically does a reset first. After 2127 * pdata->init_module() is done, PM runtime can be used for the interconnect 2128 * target module. 2129 */ 2130 static int sysc_legacy_init(struct sysc *ddata) 2131 { 2132 struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev); 2133 int error; 2134 2135 if (!pdata || !pdata->init_module) 2136 return 0; 2137 2138 error = pdata->init_module(ddata->dev, ddata->mdata, &ddata->cookie); 2139 if (error == -EEXIST) 2140 error = 0; 2141 2142 return error; 2143 } 2144 2145 /* 2146 * Note that the caller must ensure the interconnect target module is enabled 2147 * before calling reset. Otherwise reset will not complete. 2148 */ 2149 static int sysc_reset(struct sysc *ddata) 2150 { 2151 int sysc_offset, sysc_val, error; 2152 u32 sysc_mask; 2153 2154 sysc_offset = ddata->offsets[SYSC_SYSCONFIG]; 2155 2156 if (ddata->legacy_mode || 2157 ddata->cap->regbits->srst_shift < 0) 2158 return 0; 2159 2160 sysc_mask = BIT(ddata->cap->regbits->srst_shift); 2161 2162 if (ddata->pre_reset_quirk) 2163 ddata->pre_reset_quirk(ddata); 2164 2165 if (sysc_offset >= 0) { 2166 sysc_val = sysc_read_sysconfig(ddata); 2167 sysc_val |= sysc_mask; 2168 sysc_write(ddata, sysc_offset, sysc_val); 2169 2170 /* 2171 * Some devices need a delay before reading registers 2172 * after reset. Presumably a srst_udelay is not needed 2173 * for devices that use a rstctrl register reset. 2174 */ 2175 if (ddata->cfg.srst_udelay) 2176 fsleep(ddata->cfg.srst_udelay); 2177 2178 /* 2179 * Flush posted write. For devices needing srst_udelay 2180 * this should trigger an interconnect error if the 2181 * srst_udelay value is needed but not configured. 2182 */ 2183 sysc_val = sysc_read_sysconfig(ddata); 2184 } 2185 2186 if (ddata->post_reset_quirk) 2187 ddata->post_reset_quirk(ddata); 2188 2189 error = sysc_wait_softreset(ddata); 2190 if (error) 2191 dev_warn(ddata->dev, "OCP softreset timed out\n"); 2192 2193 if (ddata->reset_done_quirk) 2194 ddata->reset_done_quirk(ddata); 2195 2196 return error; 2197 } 2198 2199 /* 2200 * At this point the module is configured enough to read the revision but 2201 * module may not be completely configured yet to use PM runtime. Enable 2202 * all clocks directly during init to configure the quirks needed for PM 2203 * runtime based on the revision register. 2204 */ 2205 static int sysc_init_module(struct sysc *ddata) 2206 { 2207 bool rstctrl_deasserted = false; 2208 int error = 0; 2209 2210 error = sysc_clockdomain_init(ddata); 2211 if (error) 2212 return error; 2213 2214 sysc_clkdm_deny_idle(ddata); 2215 2216 /* 2217 * Always enable clocks. The bootloader may or may not have enabled 2218 * the related clocks. 2219 */ 2220 error = sysc_enable_opt_clocks(ddata); 2221 if (error) 2222 return error; 2223 2224 error = sysc_enable_main_clocks(ddata); 2225 if (error) 2226 goto err_opt_clocks; 2227 2228 if (!(ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)) { 2229 error = reset_control_deassert(ddata->rsts); 2230 if (error) 2231 goto err_main_clocks; 2232 rstctrl_deasserted = true; 2233 } 2234 2235 ddata->revision = sysc_read_revision(ddata); 2236 sysc_init_revision_quirks(ddata); 2237 sysc_init_module_quirks(ddata); 2238 2239 if (ddata->legacy_mode) { 2240 error = sysc_legacy_init(ddata); 2241 if (error) 2242 goto err_main_clocks; 2243 } 2244 2245 if (!ddata->legacy_mode) { 2246 error = sysc_enable_module(ddata->dev); 2247 if (error) 2248 goto err_main_clocks; 2249 } 2250 2251 if (!(ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)) { 2252 error = sysc_reset(ddata); 2253 if (error) 2254 dev_err(ddata->dev, "Reset failed with %d\n", error); 2255 2256 if (error && !ddata->legacy_mode) 2257 sysc_disable_module(ddata->dev); 2258 } 2259 2260 err_main_clocks: 2261 if (error) 2262 sysc_disable_main_clocks(ddata); 2263 err_opt_clocks: 2264 /* No re-enable of clockdomain autoidle to prevent module autoidle */ 2265 if (error) { 2266 sysc_disable_opt_clocks(ddata); 2267 sysc_clkdm_allow_idle(ddata); 2268 } 2269 2270 if (error && rstctrl_deasserted && 2271 !(ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)) 2272 reset_control_assert(ddata->rsts); 2273 2274 return error; 2275 } 2276 2277 static int sysc_init_sysc_mask(struct sysc *ddata) 2278 { 2279 struct device_node *np = ddata->dev->of_node; 2280 int error; 2281 u32 val; 2282 2283 error = of_property_read_u32(np, "ti,sysc-mask", &val); 2284 if (error) 2285 return 0; 2286 2287 ddata->cfg.sysc_val = val & ddata->cap->sysc_mask; 2288 2289 return 0; 2290 } 2291 2292 static int sysc_init_idlemode(struct sysc *ddata, u8 *idlemodes, 2293 const char *name) 2294 { 2295 struct device_node *np = ddata->dev->of_node; 2296 struct property *prop; 2297 const __be32 *p; 2298 u32 val; 2299 2300 of_property_for_each_u32(np, name, prop, p, val) { 2301 if (val >= SYSC_NR_IDLEMODES) { 2302 dev_err(ddata->dev, "invalid idlemode: %i\n", val); 2303 return -EINVAL; 2304 } 2305 *idlemodes |= (1 << val); 2306 } 2307 2308 return 0; 2309 } 2310 2311 static int sysc_init_idlemodes(struct sysc *ddata) 2312 { 2313 int error; 2314 2315 error = sysc_init_idlemode(ddata, &ddata->cfg.midlemodes, 2316 "ti,sysc-midle"); 2317 if (error) 2318 return error; 2319 2320 error = sysc_init_idlemode(ddata, &ddata->cfg.sidlemodes, 2321 "ti,sysc-sidle"); 2322 if (error) 2323 return error; 2324 2325 return 0; 2326 } 2327 2328 /* 2329 * Only some devices on omap4 and later have SYSCONFIG reset done 2330 * bit. We can detect this if there is no SYSSTATUS at all, or the 2331 * SYSTATUS bit 0 is not used. Note that some SYSSTATUS registers 2332 * have multiple bits for the child devices like OHCI and EHCI. 2333 * Depends on SYSC being parsed first. 2334 */ 2335 static int sysc_init_syss_mask(struct sysc *ddata) 2336 { 2337 struct device_node *np = ddata->dev->of_node; 2338 int error; 2339 u32 val; 2340 2341 error = of_property_read_u32(np, "ti,syss-mask", &val); 2342 if (error) { 2343 if ((ddata->cap->type == TI_SYSC_OMAP4 || 2344 ddata->cap->type == TI_SYSC_OMAP4_TIMER) && 2345 (ddata->cfg.sysc_val & SYSC_OMAP4_SOFTRESET)) 2346 ddata->cfg.quirks |= SYSC_QUIRK_RESET_STATUS; 2347 2348 return 0; 2349 } 2350 2351 if (!(val & 1) && (ddata->cfg.sysc_val & SYSC_OMAP4_SOFTRESET)) 2352 ddata->cfg.quirks |= SYSC_QUIRK_RESET_STATUS; 2353 2354 ddata->cfg.syss_mask = val; 2355 2356 return 0; 2357 } 2358 2359 /* 2360 * Many child device drivers need to have fck and opt clocks available 2361 * to get the clock rate for device internal configuration etc. 2362 */ 2363 static int sysc_child_add_named_clock(struct sysc *ddata, 2364 struct device *child, 2365 const char *name) 2366 { 2367 struct clk *clk; 2368 struct clk_lookup *l; 2369 int error = 0; 2370 2371 if (!name) 2372 return 0; 2373 2374 clk = clk_get(child, name); 2375 if (!IS_ERR(clk)) { 2376 error = -EEXIST; 2377 goto put_clk; 2378 } 2379 2380 clk = clk_get(ddata->dev, name); 2381 if (IS_ERR(clk)) 2382 return -ENODEV; 2383 2384 l = clkdev_create(clk, name, dev_name(child)); 2385 if (!l) 2386 error = -ENOMEM; 2387 put_clk: 2388 clk_put(clk); 2389 2390 return error; 2391 } 2392 2393 static int sysc_child_add_clocks(struct sysc *ddata, 2394 struct device *child) 2395 { 2396 int i, error; 2397 2398 for (i = 0; i < ddata->nr_clocks; i++) { 2399 error = sysc_child_add_named_clock(ddata, 2400 child, 2401 ddata->clock_roles[i]); 2402 if (error && error != -EEXIST) { 2403 dev_err(ddata->dev, "could not add child clock %s: %i\n", 2404 ddata->clock_roles[i], error); 2405 2406 return error; 2407 } 2408 } 2409 2410 return 0; 2411 } 2412 2413 static const struct device_type sysc_device_type = { 2414 }; 2415 2416 static struct sysc *sysc_child_to_parent(struct device *dev) 2417 { 2418 struct device *parent = dev->parent; 2419 2420 if (!parent || parent->type != &sysc_device_type) 2421 return NULL; 2422 2423 return dev_get_drvdata(parent); 2424 } 2425 2426 static int __maybe_unused sysc_child_runtime_suspend(struct device *dev) 2427 { 2428 struct sysc *ddata; 2429 int error; 2430 2431 ddata = sysc_child_to_parent(dev); 2432 2433 error = pm_generic_runtime_suspend(dev); 2434 if (error) 2435 return error; 2436 2437 if (!ddata->enabled) 2438 return 0; 2439 2440 return sysc_runtime_suspend(ddata->dev); 2441 } 2442 2443 static int __maybe_unused sysc_child_runtime_resume(struct device *dev) 2444 { 2445 struct sysc *ddata; 2446 int error; 2447 2448 ddata = sysc_child_to_parent(dev); 2449 2450 if (!ddata->enabled) { 2451 error = sysc_runtime_resume(ddata->dev); 2452 if (error < 0) 2453 dev_err(ddata->dev, 2454 "%s error: %i\n", __func__, error); 2455 } 2456 2457 return pm_generic_runtime_resume(dev); 2458 } 2459 2460 #ifdef CONFIG_PM_SLEEP 2461 static int sysc_child_suspend_noirq(struct device *dev) 2462 { 2463 struct sysc *ddata; 2464 int error; 2465 2466 ddata = sysc_child_to_parent(dev); 2467 2468 dev_dbg(ddata->dev, "%s %s\n", __func__, 2469 ddata->name ? ddata->name : ""); 2470 2471 error = pm_generic_suspend_noirq(dev); 2472 if (error) { 2473 dev_err(dev, "%s error at %i: %i\n", 2474 __func__, __LINE__, error); 2475 2476 return error; 2477 } 2478 2479 if (!pm_runtime_status_suspended(dev)) { 2480 error = pm_generic_runtime_suspend(dev); 2481 if (error) { 2482 dev_dbg(dev, "%s busy at %i: %i\n", 2483 __func__, __LINE__, error); 2484 2485 return 0; 2486 } 2487 2488 error = sysc_runtime_suspend(ddata->dev); 2489 if (error) { 2490 dev_err(dev, "%s error at %i: %i\n", 2491 __func__, __LINE__, error); 2492 2493 return error; 2494 } 2495 2496 ddata->child_needs_resume = true; 2497 } 2498 2499 return 0; 2500 } 2501 2502 static int sysc_child_resume_noirq(struct device *dev) 2503 { 2504 struct sysc *ddata; 2505 int error; 2506 2507 ddata = sysc_child_to_parent(dev); 2508 2509 dev_dbg(ddata->dev, "%s %s\n", __func__, 2510 ddata->name ? ddata->name : ""); 2511 2512 if (ddata->child_needs_resume) { 2513 ddata->child_needs_resume = false; 2514 2515 error = sysc_runtime_resume(ddata->dev); 2516 if (error) 2517 dev_err(ddata->dev, 2518 "%s runtime resume error: %i\n", 2519 __func__, error); 2520 2521 error = pm_generic_runtime_resume(dev); 2522 if (error) 2523 dev_err(ddata->dev, 2524 "%s generic runtime resume: %i\n", 2525 __func__, error); 2526 } 2527 2528 return pm_generic_resume_noirq(dev); 2529 } 2530 #endif 2531 2532 static struct dev_pm_domain sysc_child_pm_domain = { 2533 .ops = { 2534 SET_RUNTIME_PM_OPS(sysc_child_runtime_suspend, 2535 sysc_child_runtime_resume, 2536 NULL) 2537 USE_PLATFORM_PM_SLEEP_OPS 2538 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_child_suspend_noirq, 2539 sysc_child_resume_noirq) 2540 } 2541 }; 2542 2543 /* Caller needs to take list_lock if ever used outside of cpu_pm */ 2544 static void sysc_reinit_modules(struct sysc_soc_info *soc) 2545 { 2546 struct sysc_module *module; 2547 struct sysc *ddata; 2548 2549 list_for_each_entry(module, &sysc_soc->restored_modules, node) { 2550 ddata = module->ddata; 2551 sysc_reinit_module(ddata, ddata->enabled); 2552 } 2553 } 2554 2555 /** 2556 * sysc_context_notifier - optionally reset and restore module after idle 2557 * @nb: notifier block 2558 * @cmd: unused 2559 * @v: unused 2560 * 2561 * Some interconnect target modules need to be restored, or reset and restored 2562 * on CPU_PM CPU_PM_CLUSTER_EXIT notifier. This is needed at least for am335x 2563 * OTG and GPMC target modules even if the modules are unused. 2564 */ 2565 static int sysc_context_notifier(struct notifier_block *nb, unsigned long cmd, 2566 void *v) 2567 { 2568 struct sysc_soc_info *soc; 2569 2570 soc = container_of(nb, struct sysc_soc_info, nb); 2571 2572 switch (cmd) { 2573 case CPU_CLUSTER_PM_ENTER: 2574 break; 2575 case CPU_CLUSTER_PM_ENTER_FAILED: /* No need to restore context */ 2576 break; 2577 case CPU_CLUSTER_PM_EXIT: 2578 sysc_reinit_modules(soc); 2579 break; 2580 } 2581 2582 return NOTIFY_OK; 2583 } 2584 2585 /** 2586 * sysc_add_restored - optionally add reset and restore quirk hanlling 2587 * @ddata: device data 2588 */ 2589 static void sysc_add_restored(struct sysc *ddata) 2590 { 2591 struct sysc_module *restored_module; 2592 2593 restored_module = kzalloc(sizeof(*restored_module), GFP_KERNEL); 2594 if (!restored_module) 2595 return; 2596 2597 restored_module->ddata = ddata; 2598 2599 mutex_lock(&sysc_soc->list_lock); 2600 2601 list_add(&restored_module->node, &sysc_soc->restored_modules); 2602 2603 if (sysc_soc->nb.notifier_call) 2604 goto out_unlock; 2605 2606 sysc_soc->nb.notifier_call = sysc_context_notifier; 2607 cpu_pm_register_notifier(&sysc_soc->nb); 2608 2609 out_unlock: 2610 mutex_unlock(&sysc_soc->list_lock); 2611 } 2612 2613 /** 2614 * sysc_legacy_idle_quirk - handle children in omap_device compatible way 2615 * @ddata: device driver data 2616 * @child: child device driver 2617 * 2618 * Allow idle for child devices as done with _od_runtime_suspend(). 2619 * Otherwise many child devices will not idle because of the permanent 2620 * parent usecount set in pm_runtime_irq_safe(). 2621 * 2622 * Note that the long term solution is to just modify the child device 2623 * drivers to not set pm_runtime_irq_safe() and then this can be just 2624 * dropped. 2625 */ 2626 static void sysc_legacy_idle_quirk(struct sysc *ddata, struct device *child) 2627 { 2628 if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE) 2629 dev_pm_domain_set(child, &sysc_child_pm_domain); 2630 } 2631 2632 static int sysc_notifier_call(struct notifier_block *nb, 2633 unsigned long event, void *device) 2634 { 2635 struct device *dev = device; 2636 struct sysc *ddata; 2637 int error; 2638 2639 ddata = sysc_child_to_parent(dev); 2640 if (!ddata) 2641 return NOTIFY_DONE; 2642 2643 switch (event) { 2644 case BUS_NOTIFY_ADD_DEVICE: 2645 error = sysc_child_add_clocks(ddata, dev); 2646 if (error) 2647 return error; 2648 sysc_legacy_idle_quirk(ddata, dev); 2649 break; 2650 default: 2651 break; 2652 } 2653 2654 return NOTIFY_DONE; 2655 } 2656 2657 static struct notifier_block sysc_nb = { 2658 .notifier_call = sysc_notifier_call, 2659 }; 2660 2661 /* Device tree configured quirks */ 2662 struct sysc_dts_quirk { 2663 const char *name; 2664 u32 mask; 2665 }; 2666 2667 static const struct sysc_dts_quirk sysc_dts_quirks[] = { 2668 { .name = "ti,no-idle-on-init", 2669 .mask = SYSC_QUIRK_NO_IDLE_ON_INIT, }, 2670 { .name = "ti,no-reset-on-init", 2671 .mask = SYSC_QUIRK_NO_RESET_ON_INIT, }, 2672 { .name = "ti,no-idle", 2673 .mask = SYSC_QUIRK_NO_IDLE, }, 2674 }; 2675 2676 static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np, 2677 bool is_child) 2678 { 2679 const struct property *prop; 2680 int i, len; 2681 2682 for (i = 0; i < ARRAY_SIZE(sysc_dts_quirks); i++) { 2683 const char *name = sysc_dts_quirks[i].name; 2684 2685 prop = of_get_property(np, name, &len); 2686 if (!prop) 2687 continue; 2688 2689 ddata->cfg.quirks |= sysc_dts_quirks[i].mask; 2690 if (is_child) { 2691 dev_warn(ddata->dev, 2692 "dts flag should be at module level for %s\n", 2693 name); 2694 } 2695 } 2696 } 2697 2698 static int sysc_init_dts_quirks(struct sysc *ddata) 2699 { 2700 struct device_node *np = ddata->dev->of_node; 2701 int error; 2702 u32 val; 2703 2704 ddata->legacy_mode = of_get_property(np, "ti,hwmods", NULL); 2705 2706 sysc_parse_dts_quirks(ddata, np, false); 2707 error = of_property_read_u32(np, "ti,sysc-delay-us", &val); 2708 if (!error) { 2709 if (val > 255) { 2710 dev_warn(ddata->dev, "bad ti,sysc-delay-us: %i\n", 2711 val); 2712 } 2713 2714 ddata->cfg.srst_udelay = (u8)val; 2715 } 2716 2717 return 0; 2718 } 2719 2720 static void sysc_unprepare(struct sysc *ddata) 2721 { 2722 int i; 2723 2724 if (!ddata->clocks) 2725 return; 2726 2727 for (i = 0; i < SYSC_MAX_CLOCKS; i++) { 2728 if (!IS_ERR_OR_NULL(ddata->clocks[i])) 2729 clk_unprepare(ddata->clocks[i]); 2730 } 2731 } 2732 2733 /* 2734 * Common sysc register bits found on omap2, also known as type1 2735 */ 2736 static const struct sysc_regbits sysc_regbits_omap2 = { 2737 .dmadisable_shift = -ENODEV, 2738 .midle_shift = 12, 2739 .sidle_shift = 3, 2740 .clkact_shift = 8, 2741 .emufree_shift = 5, 2742 .enwkup_shift = 2, 2743 .srst_shift = 1, 2744 .autoidle_shift = 0, 2745 }; 2746 2747 static const struct sysc_capabilities sysc_omap2 = { 2748 .type = TI_SYSC_OMAP2, 2749 .sysc_mask = SYSC_OMAP2_CLOCKACTIVITY | SYSC_OMAP2_EMUFREE | 2750 SYSC_OMAP2_ENAWAKEUP | SYSC_OMAP2_SOFTRESET | 2751 SYSC_OMAP2_AUTOIDLE, 2752 .regbits = &sysc_regbits_omap2, 2753 }; 2754 2755 /* All omap2 and 3 timers, and timers 1, 2 & 10 on omap 4 and 5 */ 2756 static const struct sysc_capabilities sysc_omap2_timer = { 2757 .type = TI_SYSC_OMAP2_TIMER, 2758 .sysc_mask = SYSC_OMAP2_CLOCKACTIVITY | SYSC_OMAP2_EMUFREE | 2759 SYSC_OMAP2_ENAWAKEUP | SYSC_OMAP2_SOFTRESET | 2760 SYSC_OMAP2_AUTOIDLE, 2761 .regbits = &sysc_regbits_omap2, 2762 .mod_quirks = SYSC_QUIRK_USE_CLOCKACT, 2763 }; 2764 2765 /* 2766 * SHAM2 (SHA1/MD5) sysc found on omap3, a variant of sysc_regbits_omap2 2767 * with different sidle position 2768 */ 2769 static const struct sysc_regbits sysc_regbits_omap3_sham = { 2770 .dmadisable_shift = -ENODEV, 2771 .midle_shift = -ENODEV, 2772 .sidle_shift = 4, 2773 .clkact_shift = -ENODEV, 2774 .enwkup_shift = -ENODEV, 2775 .srst_shift = 1, 2776 .autoidle_shift = 0, 2777 .emufree_shift = -ENODEV, 2778 }; 2779 2780 static const struct sysc_capabilities sysc_omap3_sham = { 2781 .type = TI_SYSC_OMAP3_SHAM, 2782 .sysc_mask = SYSC_OMAP2_SOFTRESET | SYSC_OMAP2_AUTOIDLE, 2783 .regbits = &sysc_regbits_omap3_sham, 2784 }; 2785 2786 /* 2787 * AES register bits found on omap3 and later, a variant of 2788 * sysc_regbits_omap2 with different sidle position 2789 */ 2790 static const struct sysc_regbits sysc_regbits_omap3_aes = { 2791 .dmadisable_shift = -ENODEV, 2792 .midle_shift = -ENODEV, 2793 .sidle_shift = 6, 2794 .clkact_shift = -ENODEV, 2795 .enwkup_shift = -ENODEV, 2796 .srst_shift = 1, 2797 .autoidle_shift = 0, 2798 .emufree_shift = -ENODEV, 2799 }; 2800 2801 static const struct sysc_capabilities sysc_omap3_aes = { 2802 .type = TI_SYSC_OMAP3_AES, 2803 .sysc_mask = SYSC_OMAP2_SOFTRESET | SYSC_OMAP2_AUTOIDLE, 2804 .regbits = &sysc_regbits_omap3_aes, 2805 }; 2806 2807 /* 2808 * Common sysc register bits found on omap4, also known as type2 2809 */ 2810 static const struct sysc_regbits sysc_regbits_omap4 = { 2811 .dmadisable_shift = 16, 2812 .midle_shift = 4, 2813 .sidle_shift = 2, 2814 .clkact_shift = -ENODEV, 2815 .enwkup_shift = -ENODEV, 2816 .emufree_shift = 1, 2817 .srst_shift = 0, 2818 .autoidle_shift = -ENODEV, 2819 }; 2820 2821 static const struct sysc_capabilities sysc_omap4 = { 2822 .type = TI_SYSC_OMAP4, 2823 .sysc_mask = SYSC_OMAP4_DMADISABLE | SYSC_OMAP4_FREEEMU | 2824 SYSC_OMAP4_SOFTRESET, 2825 .regbits = &sysc_regbits_omap4, 2826 }; 2827 2828 static const struct sysc_capabilities sysc_omap4_timer = { 2829 .type = TI_SYSC_OMAP4_TIMER, 2830 .sysc_mask = SYSC_OMAP4_DMADISABLE | SYSC_OMAP4_FREEEMU | 2831 SYSC_OMAP4_SOFTRESET, 2832 .regbits = &sysc_regbits_omap4, 2833 }; 2834 2835 /* 2836 * Common sysc register bits found on omap4, also known as type3 2837 */ 2838 static const struct sysc_regbits sysc_regbits_omap4_simple = { 2839 .dmadisable_shift = -ENODEV, 2840 .midle_shift = 2, 2841 .sidle_shift = 0, 2842 .clkact_shift = -ENODEV, 2843 .enwkup_shift = -ENODEV, 2844 .srst_shift = -ENODEV, 2845 .emufree_shift = -ENODEV, 2846 .autoidle_shift = -ENODEV, 2847 }; 2848 2849 static const struct sysc_capabilities sysc_omap4_simple = { 2850 .type = TI_SYSC_OMAP4_SIMPLE, 2851 .regbits = &sysc_regbits_omap4_simple, 2852 }; 2853 2854 /* 2855 * SmartReflex sysc found on omap34xx 2856 */ 2857 static const struct sysc_regbits sysc_regbits_omap34xx_sr = { 2858 .dmadisable_shift = -ENODEV, 2859 .midle_shift = -ENODEV, 2860 .sidle_shift = -ENODEV, 2861 .clkact_shift = 20, 2862 .enwkup_shift = -ENODEV, 2863 .srst_shift = -ENODEV, 2864 .emufree_shift = -ENODEV, 2865 .autoidle_shift = -ENODEV, 2866 }; 2867 2868 static const struct sysc_capabilities sysc_34xx_sr = { 2869 .type = TI_SYSC_OMAP34XX_SR, 2870 .sysc_mask = SYSC_OMAP2_CLOCKACTIVITY, 2871 .regbits = &sysc_regbits_omap34xx_sr, 2872 .mod_quirks = SYSC_QUIRK_USE_CLOCKACT | SYSC_QUIRK_UNCACHED, 2873 }; 2874 2875 /* 2876 * SmartReflex sysc found on omap36xx and later 2877 */ 2878 static const struct sysc_regbits sysc_regbits_omap36xx_sr = { 2879 .dmadisable_shift = -ENODEV, 2880 .midle_shift = -ENODEV, 2881 .sidle_shift = 24, 2882 .clkact_shift = -ENODEV, 2883 .enwkup_shift = 26, 2884 .srst_shift = -ENODEV, 2885 .emufree_shift = -ENODEV, 2886 .autoidle_shift = -ENODEV, 2887 }; 2888 2889 static const struct sysc_capabilities sysc_36xx_sr = { 2890 .type = TI_SYSC_OMAP36XX_SR, 2891 .sysc_mask = SYSC_OMAP3_SR_ENAWAKEUP, 2892 .regbits = &sysc_regbits_omap36xx_sr, 2893 .mod_quirks = SYSC_QUIRK_UNCACHED, 2894 }; 2895 2896 static const struct sysc_capabilities sysc_omap4_sr = { 2897 .type = TI_SYSC_OMAP4_SR, 2898 .regbits = &sysc_regbits_omap36xx_sr, 2899 }; 2900 2901 /* 2902 * McASP register bits found on omap4 and later 2903 */ 2904 static const struct sysc_regbits sysc_regbits_omap4_mcasp = { 2905 .dmadisable_shift = -ENODEV, 2906 .midle_shift = -ENODEV, 2907 .sidle_shift = 0, 2908 .clkact_shift = -ENODEV, 2909 .enwkup_shift = -ENODEV, 2910 .srst_shift = -ENODEV, 2911 .emufree_shift = -ENODEV, 2912 .autoidle_shift = -ENODEV, 2913 }; 2914 2915 static const struct sysc_capabilities sysc_omap4_mcasp = { 2916 .type = TI_SYSC_OMAP4_MCASP, 2917 .regbits = &sysc_regbits_omap4_mcasp, 2918 .mod_quirks = SYSC_QUIRK_OPT_CLKS_NEEDED, 2919 }; 2920 2921 /* 2922 * McASP found on dra7 and later 2923 */ 2924 static const struct sysc_capabilities sysc_dra7_mcasp = { 2925 .type = TI_SYSC_OMAP4_SIMPLE, 2926 .regbits = &sysc_regbits_omap4_simple, 2927 .mod_quirks = SYSC_QUIRK_OPT_CLKS_NEEDED, 2928 }; 2929 2930 /* 2931 * FS USB host found on omap4 and later 2932 */ 2933 static const struct sysc_regbits sysc_regbits_omap4_usb_host_fs = { 2934 .dmadisable_shift = -ENODEV, 2935 .midle_shift = -ENODEV, 2936 .sidle_shift = 24, 2937 .clkact_shift = -ENODEV, 2938 .enwkup_shift = 26, 2939 .srst_shift = -ENODEV, 2940 .emufree_shift = -ENODEV, 2941 .autoidle_shift = -ENODEV, 2942 }; 2943 2944 static const struct sysc_capabilities sysc_omap4_usb_host_fs = { 2945 .type = TI_SYSC_OMAP4_USB_HOST_FS, 2946 .sysc_mask = SYSC_OMAP2_ENAWAKEUP, 2947 .regbits = &sysc_regbits_omap4_usb_host_fs, 2948 }; 2949 2950 static const struct sysc_regbits sysc_regbits_dra7_mcan = { 2951 .dmadisable_shift = -ENODEV, 2952 .midle_shift = -ENODEV, 2953 .sidle_shift = -ENODEV, 2954 .clkact_shift = -ENODEV, 2955 .enwkup_shift = 4, 2956 .srst_shift = 0, 2957 .emufree_shift = -ENODEV, 2958 .autoidle_shift = -ENODEV, 2959 }; 2960 2961 static const struct sysc_capabilities sysc_dra7_mcan = { 2962 .type = TI_SYSC_DRA7_MCAN, 2963 .sysc_mask = SYSC_DRA7_MCAN_ENAWAKEUP | SYSC_OMAP4_SOFTRESET, 2964 .regbits = &sysc_regbits_dra7_mcan, 2965 .mod_quirks = SYSS_QUIRK_RESETDONE_INVERTED, 2966 }; 2967 2968 /* 2969 * PRUSS found on some AM33xx, AM437x and AM57xx SoCs 2970 */ 2971 static const struct sysc_capabilities sysc_pruss = { 2972 .type = TI_SYSC_PRUSS, 2973 .sysc_mask = SYSC_PRUSS_STANDBY_INIT | SYSC_PRUSS_SUB_MWAIT, 2974 .regbits = &sysc_regbits_omap4_simple, 2975 .mod_quirks = SYSC_MODULE_QUIRK_PRUSS, 2976 }; 2977 2978 static int sysc_init_pdata(struct sysc *ddata) 2979 { 2980 struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev); 2981 struct ti_sysc_module_data *mdata; 2982 2983 if (!pdata) 2984 return 0; 2985 2986 mdata = devm_kzalloc(ddata->dev, sizeof(*mdata), GFP_KERNEL); 2987 if (!mdata) 2988 return -ENOMEM; 2989 2990 if (ddata->legacy_mode) { 2991 mdata->name = ddata->legacy_mode; 2992 mdata->module_pa = ddata->module_pa; 2993 mdata->module_size = ddata->module_size; 2994 mdata->offsets = ddata->offsets; 2995 mdata->nr_offsets = SYSC_MAX_REGS; 2996 mdata->cap = ddata->cap; 2997 mdata->cfg = &ddata->cfg; 2998 } 2999 3000 ddata->mdata = mdata; 3001 3002 return 0; 3003 } 3004 3005 static int sysc_init_match(struct sysc *ddata) 3006 { 3007 const struct sysc_capabilities *cap; 3008 3009 cap = of_device_get_match_data(ddata->dev); 3010 if (!cap) 3011 return -EINVAL; 3012 3013 ddata->cap = cap; 3014 if (ddata->cap) 3015 ddata->cfg.quirks |= ddata->cap->mod_quirks; 3016 3017 return 0; 3018 } 3019 3020 static void ti_sysc_idle(struct work_struct *work) 3021 { 3022 struct sysc *ddata; 3023 3024 ddata = container_of(work, struct sysc, idle_work.work); 3025 3026 /* 3027 * One time decrement of clock usage counts if left on from init. 3028 * Note that we disable opt clocks unconditionally in this case 3029 * as they are enabled unconditionally during init without 3030 * considering sysc_opt_clks_needed() at that point. 3031 */ 3032 if (ddata->cfg.quirks & (SYSC_QUIRK_NO_IDLE | 3033 SYSC_QUIRK_NO_IDLE_ON_INIT)) { 3034 sysc_disable_main_clocks(ddata); 3035 sysc_disable_opt_clocks(ddata); 3036 sysc_clkdm_allow_idle(ddata); 3037 } 3038 3039 /* Keep permanent PM runtime usage count for SYSC_QUIRK_NO_IDLE */ 3040 if (ddata->cfg.quirks & SYSC_QUIRK_NO_IDLE) 3041 return; 3042 3043 /* 3044 * Decrement PM runtime usage count for SYSC_QUIRK_NO_IDLE_ON_INIT 3045 * and SYSC_QUIRK_NO_RESET_ON_INIT 3046 */ 3047 if (pm_runtime_active(ddata->dev)) 3048 pm_runtime_put_sync(ddata->dev); 3049 } 3050 3051 /* 3052 * SoC model and features detection. Only needed for SoCs that need 3053 * special handling for quirks, no need to list others. 3054 */ 3055 static const struct soc_device_attribute sysc_soc_match[] = { 3056 SOC_FLAG("OMAP242*", SOC_2420), 3057 SOC_FLAG("OMAP243*", SOC_2430), 3058 SOC_FLAG("AM35*", SOC_AM35), 3059 SOC_FLAG("OMAP3[45]*", SOC_3430), 3060 SOC_FLAG("OMAP3[67]*", SOC_3630), 3061 SOC_FLAG("OMAP443*", SOC_4430), 3062 SOC_FLAG("OMAP446*", SOC_4460), 3063 SOC_FLAG("OMAP447*", SOC_4470), 3064 SOC_FLAG("OMAP54*", SOC_5430), 3065 SOC_FLAG("AM433", SOC_AM3), 3066 SOC_FLAG("AM43*", SOC_AM4), 3067 SOC_FLAG("DRA7*", SOC_DRA7), 3068 3069 { /* sentinel */ } 3070 }; 3071 3072 /* 3073 * List of SoCs variants with disabled features. By default we assume all 3074 * devices in the device tree are available so no need to list those SoCs. 3075 */ 3076 static const struct soc_device_attribute sysc_soc_feat_match[] = { 3077 /* OMAP3430/3530 and AM3517 variants with some accelerators disabled */ 3078 SOC_FLAG("AM3505", DIS_SGX), 3079 SOC_FLAG("OMAP3525", DIS_SGX), 3080 SOC_FLAG("OMAP3515", DIS_IVA | DIS_SGX), 3081 SOC_FLAG("OMAP3503", DIS_ISP | DIS_IVA | DIS_SGX), 3082 3083 /* OMAP3630/DM3730 variants with some accelerators disabled */ 3084 SOC_FLAG("AM3703", DIS_IVA | DIS_SGX), 3085 SOC_FLAG("DM3725", DIS_SGX), 3086 SOC_FLAG("OMAP3611", DIS_ISP | DIS_IVA | DIS_SGX), 3087 SOC_FLAG("OMAP3615/AM3715", DIS_IVA), 3088 SOC_FLAG("OMAP3621", DIS_ISP), 3089 3090 { /* sentinel */ } 3091 }; 3092 3093 static int sysc_add_disabled(unsigned long base) 3094 { 3095 struct sysc_address *disabled_module; 3096 3097 disabled_module = kzalloc(sizeof(*disabled_module), GFP_KERNEL); 3098 if (!disabled_module) 3099 return -ENOMEM; 3100 3101 disabled_module->base = base; 3102 3103 mutex_lock(&sysc_soc->list_lock); 3104 list_add(&disabled_module->node, &sysc_soc->disabled_modules); 3105 mutex_unlock(&sysc_soc->list_lock); 3106 3107 return 0; 3108 } 3109 3110 /* 3111 * One time init to detect the booted SoC, disable unavailable features 3112 * and initialize list for optional cpu_pm notifier. 3113 * 3114 * Note that we initialize static data shared across all ti-sysc instances 3115 * so ddata is only used for SoC type. This can be called from module_init 3116 * once we no longer need to rely on platform data. 3117 */ 3118 static int sysc_init_static_data(struct sysc *ddata) 3119 { 3120 const struct soc_device_attribute *match; 3121 struct ti_sysc_platform_data *pdata; 3122 unsigned long features = 0; 3123 struct device_node *np; 3124 3125 if (sysc_soc) 3126 return 0; 3127 3128 sysc_soc = kzalloc(sizeof(*sysc_soc), GFP_KERNEL); 3129 if (!sysc_soc) 3130 return -ENOMEM; 3131 3132 mutex_init(&sysc_soc->list_lock); 3133 INIT_LIST_HEAD(&sysc_soc->disabled_modules); 3134 INIT_LIST_HEAD(&sysc_soc->restored_modules); 3135 sysc_soc->general_purpose = true; 3136 3137 pdata = dev_get_platdata(ddata->dev); 3138 if (pdata && pdata->soc_type_gp) 3139 sysc_soc->general_purpose = pdata->soc_type_gp(); 3140 3141 match = soc_device_match(sysc_soc_match); 3142 if (match && match->data) 3143 sysc_soc->soc = (enum sysc_soc)(uintptr_t)match->data; 3144 3145 /* 3146 * Check and warn about possible old incomplete dtb. We now want to see 3147 * simple-pm-bus instead of simple-bus in the dtb for genpd using SoCs. 3148 */ 3149 switch (sysc_soc->soc) { 3150 case SOC_AM3: 3151 case SOC_AM4: 3152 case SOC_4430 ... SOC_4470: 3153 case SOC_5430: 3154 case SOC_DRA7: 3155 np = of_find_node_by_path("/ocp"); 3156 WARN_ONCE(np && of_device_is_compatible(np, "simple-bus"), 3157 "ti-sysc: Incomplete old dtb, please update\n"); 3158 break; 3159 default: 3160 break; 3161 } 3162 3163 /* Ignore devices that are not available on HS and EMU SoCs */ 3164 if (!sysc_soc->general_purpose) { 3165 switch (sysc_soc->soc) { 3166 case SOC_3430 ... SOC_3630: 3167 sysc_add_disabled(0x48304000); /* timer12 */ 3168 break; 3169 case SOC_AM3: 3170 sysc_add_disabled(0x48310000); /* rng */ 3171 break; 3172 default: 3173 break; 3174 } 3175 } 3176 3177 match = soc_device_match(sysc_soc_feat_match); 3178 if (!match) 3179 return 0; 3180 3181 if (match->data) 3182 features = (unsigned long)match->data; 3183 3184 /* 3185 * Add disabled devices to the list based on the module base. 3186 * Note that this must be done before we attempt to access the 3187 * device and have module revision checks working. 3188 */ 3189 if (features & DIS_ISP) 3190 sysc_add_disabled(0x480bd400); 3191 if (features & DIS_IVA) 3192 sysc_add_disabled(0x5d000000); 3193 if (features & DIS_SGX) 3194 sysc_add_disabled(0x50000000); 3195 3196 return 0; 3197 } 3198 3199 static void sysc_cleanup_static_data(void) 3200 { 3201 struct sysc_module *restored_module; 3202 struct sysc_address *disabled_module; 3203 struct list_head *pos, *tmp; 3204 3205 if (!sysc_soc) 3206 return; 3207 3208 if (sysc_soc->nb.notifier_call) 3209 cpu_pm_unregister_notifier(&sysc_soc->nb); 3210 3211 mutex_lock(&sysc_soc->list_lock); 3212 list_for_each_safe(pos, tmp, &sysc_soc->restored_modules) { 3213 restored_module = list_entry(pos, struct sysc_module, node); 3214 list_del(pos); 3215 kfree(restored_module); 3216 } 3217 list_for_each_safe(pos, tmp, &sysc_soc->disabled_modules) { 3218 disabled_module = list_entry(pos, struct sysc_address, node); 3219 list_del(pos); 3220 kfree(disabled_module); 3221 } 3222 mutex_unlock(&sysc_soc->list_lock); 3223 } 3224 3225 static int sysc_check_disabled_devices(struct sysc *ddata) 3226 { 3227 struct sysc_address *disabled_module; 3228 int error = 0; 3229 3230 mutex_lock(&sysc_soc->list_lock); 3231 list_for_each_entry(disabled_module, &sysc_soc->disabled_modules, node) { 3232 if (ddata->module_pa == disabled_module->base) { 3233 dev_dbg(ddata->dev, "module disabled for this SoC\n"); 3234 error = -ENODEV; 3235 break; 3236 } 3237 } 3238 mutex_unlock(&sysc_soc->list_lock); 3239 3240 return error; 3241 } 3242 3243 /* 3244 * Ignore timers tagged with no-reset and no-idle. These are likely in use, 3245 * for example by drivers/clocksource/timer-ti-dm-systimer.c. If more checks 3246 * are needed, we could also look at the timer register configuration. 3247 */ 3248 static int sysc_check_active_timer(struct sysc *ddata) 3249 { 3250 int error; 3251 3252 if (ddata->cap->type != TI_SYSC_OMAP2_TIMER && 3253 ddata->cap->type != TI_SYSC_OMAP4_TIMER) 3254 return 0; 3255 3256 /* 3257 * Quirk for omap3 beagleboard revision A to B4 to use gpt12. 3258 * Revision C and later are fixed with commit 23885389dbbb ("ARM: 3259 * dts: Fix timer regression for beagleboard revision c"). This all 3260 * can be dropped if we stop supporting old beagleboard revisions 3261 * A to B4 at some point. 3262 */ 3263 if (sysc_soc->soc == SOC_3430 || sysc_soc->soc == SOC_AM35) 3264 error = -ENXIO; 3265 else 3266 error = -EBUSY; 3267 3268 if ((ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT) && 3269 (ddata->cfg.quirks & SYSC_QUIRK_NO_IDLE)) 3270 return error; 3271 3272 return 0; 3273 } 3274 3275 static const struct of_device_id sysc_match_table[] = { 3276 { .compatible = "simple-bus", }, 3277 { /* sentinel */ }, 3278 }; 3279 3280 static int sysc_probe(struct platform_device *pdev) 3281 { 3282 struct ti_sysc_platform_data *pdata = dev_get_platdata(&pdev->dev); 3283 struct sysc *ddata; 3284 int error; 3285 3286 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); 3287 if (!ddata) 3288 return -ENOMEM; 3289 3290 ddata->offsets[SYSC_REVISION] = -ENODEV; 3291 ddata->offsets[SYSC_SYSCONFIG] = -ENODEV; 3292 ddata->offsets[SYSC_SYSSTATUS] = -ENODEV; 3293 ddata->dev = &pdev->dev; 3294 platform_set_drvdata(pdev, ddata); 3295 3296 error = sysc_init_static_data(ddata); 3297 if (error) 3298 return error; 3299 3300 error = sysc_init_match(ddata); 3301 if (error) 3302 return error; 3303 3304 error = sysc_init_dts_quirks(ddata); 3305 if (error) 3306 return error; 3307 3308 error = sysc_map_and_check_registers(ddata); 3309 if (error) 3310 return error; 3311 3312 error = sysc_init_sysc_mask(ddata); 3313 if (error) 3314 return error; 3315 3316 error = sysc_init_idlemodes(ddata); 3317 if (error) 3318 return error; 3319 3320 error = sysc_init_syss_mask(ddata); 3321 if (error) 3322 return error; 3323 3324 error = sysc_init_pdata(ddata); 3325 if (error) 3326 return error; 3327 3328 sysc_init_early_quirks(ddata); 3329 3330 error = sysc_check_disabled_devices(ddata); 3331 if (error) 3332 return error; 3333 3334 error = sysc_check_active_timer(ddata); 3335 if (error == -ENXIO) 3336 ddata->reserved = true; 3337 else if (error) 3338 return error; 3339 3340 error = sysc_get_clocks(ddata); 3341 if (error) 3342 return error; 3343 3344 error = sysc_init_resets(ddata); 3345 if (error) 3346 goto unprepare; 3347 3348 error = sysc_init_module(ddata); 3349 if (error) 3350 goto unprepare; 3351 3352 pm_runtime_enable(ddata->dev); 3353 error = pm_runtime_resume_and_get(ddata->dev); 3354 if (error < 0) { 3355 pm_runtime_disable(ddata->dev); 3356 goto unprepare; 3357 } 3358 3359 /* Balance use counts as PM runtime should have enabled these all */ 3360 if (!(ddata->cfg.quirks & 3361 (SYSC_QUIRK_NO_IDLE | SYSC_QUIRK_NO_IDLE_ON_INIT))) { 3362 sysc_disable_main_clocks(ddata); 3363 sysc_disable_opt_clocks(ddata); 3364 sysc_clkdm_allow_idle(ddata); 3365 } 3366 3367 if (!(ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)) 3368 reset_control_assert(ddata->rsts); 3369 3370 sysc_show_registers(ddata); 3371 3372 ddata->dev->type = &sysc_device_type; 3373 3374 if (!ddata->reserved) { 3375 error = of_platform_populate(ddata->dev->of_node, 3376 sysc_match_table, 3377 pdata ? pdata->auxdata : NULL, 3378 ddata->dev); 3379 if (error) 3380 goto err; 3381 } 3382 3383 INIT_DELAYED_WORK(&ddata->idle_work, ti_sysc_idle); 3384 3385 /* At least earlycon won't survive without deferred idle */ 3386 if (ddata->cfg.quirks & (SYSC_QUIRK_NO_IDLE | 3387 SYSC_QUIRK_NO_IDLE_ON_INIT | 3388 SYSC_QUIRK_NO_RESET_ON_INIT)) { 3389 schedule_delayed_work(&ddata->idle_work, 3000); 3390 } else { 3391 pm_runtime_put(&pdev->dev); 3392 } 3393 3394 if (ddata->cfg.quirks & SYSC_QUIRK_REINIT_ON_CTX_LOST) 3395 sysc_add_restored(ddata); 3396 3397 return 0; 3398 3399 err: 3400 pm_runtime_put_sync(&pdev->dev); 3401 pm_runtime_disable(&pdev->dev); 3402 unprepare: 3403 sysc_unprepare(ddata); 3404 3405 return error; 3406 } 3407 3408 static void sysc_remove(struct platform_device *pdev) 3409 { 3410 struct sysc *ddata = platform_get_drvdata(pdev); 3411 int error; 3412 3413 /* Device can still be enabled, see deferred idle quirk in probe */ 3414 if (cancel_delayed_work_sync(&ddata->idle_work)) 3415 ti_sysc_idle(&ddata->idle_work.work); 3416 3417 error = pm_runtime_resume_and_get(ddata->dev); 3418 if (error < 0) { 3419 pm_runtime_disable(ddata->dev); 3420 goto unprepare; 3421 } 3422 3423 of_platform_depopulate(&pdev->dev); 3424 3425 pm_runtime_put_sync(&pdev->dev); 3426 pm_runtime_disable(&pdev->dev); 3427 3428 if (!reset_control_status(ddata->rsts)) 3429 reset_control_assert(ddata->rsts); 3430 3431 unprepare: 3432 sysc_unprepare(ddata); 3433 } 3434 3435 static const struct of_device_id sysc_match[] = { 3436 { .compatible = "ti,sysc-omap2", .data = &sysc_omap2, }, 3437 { .compatible = "ti,sysc-omap2-timer", .data = &sysc_omap2_timer, }, 3438 { .compatible = "ti,sysc-omap4", .data = &sysc_omap4, }, 3439 { .compatible = "ti,sysc-omap4-timer", .data = &sysc_omap4_timer, }, 3440 { .compatible = "ti,sysc-omap4-simple", .data = &sysc_omap4_simple, }, 3441 { .compatible = "ti,sysc-omap3430-sr", .data = &sysc_34xx_sr, }, 3442 { .compatible = "ti,sysc-omap3630-sr", .data = &sysc_36xx_sr, }, 3443 { .compatible = "ti,sysc-omap4-sr", .data = &sysc_omap4_sr, }, 3444 { .compatible = "ti,sysc-omap3-sham", .data = &sysc_omap3_sham, }, 3445 { .compatible = "ti,sysc-omap-aes", .data = &sysc_omap3_aes, }, 3446 { .compatible = "ti,sysc-mcasp", .data = &sysc_omap4_mcasp, }, 3447 { .compatible = "ti,sysc-dra7-mcasp", .data = &sysc_dra7_mcasp, }, 3448 { .compatible = "ti,sysc-usb-host-fs", 3449 .data = &sysc_omap4_usb_host_fs, }, 3450 { .compatible = "ti,sysc-dra7-mcan", .data = &sysc_dra7_mcan, }, 3451 { .compatible = "ti,sysc-pruss", .data = &sysc_pruss, }, 3452 { }, 3453 }; 3454 MODULE_DEVICE_TABLE(of, sysc_match); 3455 3456 static struct platform_driver sysc_driver = { 3457 .probe = sysc_probe, 3458 .remove_new = sysc_remove, 3459 .driver = { 3460 .name = "ti-sysc", 3461 .of_match_table = sysc_match, 3462 .pm = &sysc_pm_ops, 3463 }, 3464 }; 3465 3466 static int __init sysc_init(void) 3467 { 3468 bus_register_notifier(&platform_bus_type, &sysc_nb); 3469 3470 return platform_driver_register(&sysc_driver); 3471 } 3472 module_init(sysc_init); 3473 3474 static void __exit sysc_exit(void) 3475 { 3476 bus_unregister_notifier(&platform_bus_type, &sysc_nb); 3477 platform_driver_unregister(&sysc_driver); 3478 sysc_cleanup_static_data(); 3479 } 3480 module_exit(sysc_exit); 3481 3482 MODULE_DESCRIPTION("TI sysc interconnect target driver"); 3483 MODULE_LICENSE("GPL v2"); 3484