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