1 /* 2 * OMAP2plus display device setup / initialization. 3 * 4 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/ 5 * Senthilvadivu Guruswamy 6 * Sumit Semwal 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any 13 * kind, whether express or implied; without even the implied warranty 14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 */ 17 18 #include <linux/string.h> 19 #include <linux/kernel.h> 20 #include <linux/init.h> 21 #include <linux/platform_device.h> 22 #include <linux/io.h> 23 #include <linux/clk.h> 24 #include <linux/err.h> 25 #include <linux/delay.h> 26 #include <linux/of.h> 27 #include <linux/of_platform.h> 28 #include <linux/slab.h> 29 #include <linux/mfd/syscon.h> 30 #include <linux/regmap.h> 31 32 #include <linux/platform_data/omapdss.h> 33 #include "omap_hwmod.h" 34 #include "omap_device.h" 35 #include "omap-pm.h" 36 #include "common.h" 37 38 #include "soc.h" 39 #include "iomap.h" 40 #include "control.h" 41 #include "display.h" 42 #include "prm.h" 43 44 #define DISPC_CONTROL 0x0040 45 #define DISPC_CONTROL2 0x0238 46 #define DISPC_CONTROL3 0x0848 47 #define DISPC_IRQSTATUS 0x0018 48 49 #define DSS_SYSCONFIG 0x10 50 #define DSS_SYSSTATUS 0x14 51 #define DSS_CONTROL 0x40 52 #define DSS_SDI_CONTROL 0x44 53 #define DSS_PLL_CONTROL 0x48 54 55 #define LCD_EN_MASK (0x1 << 0) 56 #define DIGIT_EN_MASK (0x1 << 1) 57 58 #define FRAMEDONE_IRQ_SHIFT 0 59 #define EVSYNC_EVEN_IRQ_SHIFT 2 60 #define EVSYNC_ODD_IRQ_SHIFT 3 61 #define FRAMEDONE2_IRQ_SHIFT 22 62 #define FRAMEDONE3_IRQ_SHIFT 30 63 #define FRAMEDONETV_IRQ_SHIFT 24 64 65 /* 66 * FRAMEDONE_IRQ_TIMEOUT: how long (in milliseconds) to wait during DISPC 67 * reset before deciding that something has gone wrong 68 */ 69 #define FRAMEDONE_IRQ_TIMEOUT 100 70 71 static struct platform_device omap_display_device = { 72 .name = "omapdss", 73 .id = -1, 74 .dev = { 75 .platform_data = NULL, 76 }, 77 }; 78 79 struct omap_dss_hwmod_data { 80 const char *oh_name; 81 const char *dev_name; 82 const int id; 83 }; 84 85 static const struct omap_dss_hwmod_data omap2_dss_hwmod_data[] __initconst = { 86 { "dss_core", "omapdss_dss", -1 }, 87 { "dss_dispc", "omapdss_dispc", -1 }, 88 { "dss_rfbi", "omapdss_rfbi", -1 }, 89 { "dss_venc", "omapdss_venc", -1 }, 90 }; 91 92 static const struct omap_dss_hwmod_data omap3_dss_hwmod_data[] __initconst = { 93 { "dss_core", "omapdss_dss", -1 }, 94 { "dss_dispc", "omapdss_dispc", -1 }, 95 { "dss_rfbi", "omapdss_rfbi", -1 }, 96 { "dss_venc", "omapdss_venc", -1 }, 97 { "dss_dsi1", "omapdss_dsi", 0 }, 98 }; 99 100 static const struct omap_dss_hwmod_data omap4_dss_hwmod_data[] __initconst = { 101 { "dss_core", "omapdss_dss", -1 }, 102 { "dss_dispc", "omapdss_dispc", -1 }, 103 { "dss_rfbi", "omapdss_rfbi", -1 }, 104 { "dss_dsi1", "omapdss_dsi", 0 }, 105 { "dss_dsi2", "omapdss_dsi", 1 }, 106 { "dss_hdmi", "omapdss_hdmi", -1 }, 107 }; 108 109 #define OMAP4_DSIPHY_SYSCON_OFFSET 0x78 110 111 static struct regmap *omap4_dsi_mux_syscon; 112 113 static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes) 114 { 115 u32 enable_mask, enable_shift; 116 u32 pipd_mask, pipd_shift; 117 u32 reg; 118 119 if (dsi_id == 0) { 120 enable_mask = OMAP4_DSI1_LANEENABLE_MASK; 121 enable_shift = OMAP4_DSI1_LANEENABLE_SHIFT; 122 pipd_mask = OMAP4_DSI1_PIPD_MASK; 123 pipd_shift = OMAP4_DSI1_PIPD_SHIFT; 124 } else if (dsi_id == 1) { 125 enable_mask = OMAP4_DSI2_LANEENABLE_MASK; 126 enable_shift = OMAP4_DSI2_LANEENABLE_SHIFT; 127 pipd_mask = OMAP4_DSI2_PIPD_MASK; 128 pipd_shift = OMAP4_DSI2_PIPD_SHIFT; 129 } else { 130 return -ENODEV; 131 } 132 133 regmap_read(omap4_dsi_mux_syscon, OMAP4_DSIPHY_SYSCON_OFFSET, ®); 134 135 reg &= ~enable_mask; 136 reg &= ~pipd_mask; 137 138 reg |= (lanes << enable_shift) & enable_mask; 139 reg |= (lanes << pipd_shift) & pipd_mask; 140 141 regmap_write(omap4_dsi_mux_syscon, OMAP4_DSIPHY_SYSCON_OFFSET, reg); 142 143 return 0; 144 } 145 146 static int omap_dsi_enable_pads(int dsi_id, unsigned lane_mask) 147 { 148 if (cpu_is_omap44xx()) 149 return omap4_dsi_mux_pads(dsi_id, lane_mask); 150 151 return 0; 152 } 153 154 static void omap_dsi_disable_pads(int dsi_id, unsigned lane_mask) 155 { 156 if (cpu_is_omap44xx()) 157 omap4_dsi_mux_pads(dsi_id, 0); 158 } 159 160 static int omap_dss_set_min_bus_tput(struct device *dev, unsigned long tput) 161 { 162 return omap_pm_set_min_bus_tput(dev, OCP_INITIATOR_AGENT, tput); 163 } 164 165 static struct platform_device *create_dss_pdev(const char *pdev_name, 166 int pdev_id, const char *oh_name, void *pdata, int pdata_len, 167 struct platform_device *parent) 168 { 169 struct platform_device *pdev; 170 struct omap_device *od; 171 struct omap_hwmod *ohs[1]; 172 struct omap_hwmod *oh; 173 int r; 174 175 oh = omap_hwmod_lookup(oh_name); 176 if (!oh) { 177 pr_err("Could not look up %s\n", oh_name); 178 r = -ENODEV; 179 goto err; 180 } 181 182 pdev = platform_device_alloc(pdev_name, pdev_id); 183 if (!pdev) { 184 pr_err("Could not create pdev for %s\n", pdev_name); 185 r = -ENOMEM; 186 goto err; 187 } 188 189 if (parent != NULL) 190 pdev->dev.parent = &parent->dev; 191 192 if (pdev->id != -1) 193 dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); 194 else 195 dev_set_name(&pdev->dev, "%s", pdev->name); 196 197 ohs[0] = oh; 198 od = omap_device_alloc(pdev, ohs, 1); 199 if (IS_ERR(od)) { 200 pr_err("Could not alloc omap_device for %s\n", pdev_name); 201 r = -ENOMEM; 202 goto err; 203 } 204 205 r = platform_device_add_data(pdev, pdata, pdata_len); 206 if (r) { 207 pr_err("Could not set pdata for %s\n", pdev_name); 208 goto err; 209 } 210 211 r = omap_device_register(pdev); 212 if (r) { 213 pr_err("Could not register omap_device for %s\n", pdev_name); 214 goto err; 215 } 216 217 return pdev; 218 219 err: 220 return ERR_PTR(r); 221 } 222 223 static struct platform_device *create_simple_dss_pdev(const char *pdev_name, 224 int pdev_id, void *pdata, int pdata_len, 225 struct platform_device *parent) 226 { 227 struct platform_device *pdev; 228 int r; 229 230 pdev = platform_device_alloc(pdev_name, pdev_id); 231 if (!pdev) { 232 pr_err("Could not create pdev for %s\n", pdev_name); 233 r = -ENOMEM; 234 goto err; 235 } 236 237 if (parent != NULL) 238 pdev->dev.parent = &parent->dev; 239 240 if (pdev->id != -1) 241 dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); 242 else 243 dev_set_name(&pdev->dev, "%s", pdev->name); 244 245 r = platform_device_add_data(pdev, pdata, pdata_len); 246 if (r) { 247 pr_err("Could not set pdata for %s\n", pdev_name); 248 goto err; 249 } 250 251 r = platform_device_add(pdev); 252 if (r) { 253 pr_err("Could not register platform_device for %s\n", pdev_name); 254 goto err; 255 } 256 257 return pdev; 258 259 err: 260 return ERR_PTR(r); 261 } 262 263 static enum omapdss_version __init omap_display_get_version(void) 264 { 265 if (cpu_is_omap24xx()) 266 return OMAPDSS_VER_OMAP24xx; 267 else if (cpu_is_omap3630()) 268 return OMAPDSS_VER_OMAP3630; 269 else if (cpu_is_omap34xx()) { 270 if (soc_is_am35xx()) { 271 return OMAPDSS_VER_AM35xx; 272 } else { 273 if (omap_rev() < OMAP3430_REV_ES3_0) 274 return OMAPDSS_VER_OMAP34xx_ES1; 275 else 276 return OMAPDSS_VER_OMAP34xx_ES3; 277 } 278 } else if (omap_rev() == OMAP4430_REV_ES1_0) 279 return OMAPDSS_VER_OMAP4430_ES1; 280 else if (omap_rev() == OMAP4430_REV_ES2_0 || 281 omap_rev() == OMAP4430_REV_ES2_1 || 282 omap_rev() == OMAP4430_REV_ES2_2) 283 return OMAPDSS_VER_OMAP4430_ES2; 284 else if (cpu_is_omap44xx()) 285 return OMAPDSS_VER_OMAP4; 286 else if (soc_is_omap54xx()) 287 return OMAPDSS_VER_OMAP5; 288 else if (soc_is_am43xx()) 289 return OMAPDSS_VER_AM43xx; 290 else if (soc_is_dra7xx()) 291 return OMAPDSS_VER_DRA7xx; 292 else 293 return OMAPDSS_VER_UNKNOWN; 294 } 295 296 int __init omap_display_init(struct omap_dss_board_info *board_data) 297 { 298 int r = 0; 299 struct platform_device *pdev; 300 int i, oh_count; 301 const struct omap_dss_hwmod_data *curr_dss_hwmod; 302 struct platform_device *dss_pdev; 303 enum omapdss_version ver; 304 305 /* create omapdss device */ 306 307 ver = omap_display_get_version(); 308 309 if (ver == OMAPDSS_VER_UNKNOWN) { 310 pr_err("DSS not supported on this SoC\n"); 311 return -ENODEV; 312 } 313 314 board_data->version = ver; 315 board_data->dsi_enable_pads = omap_dsi_enable_pads; 316 board_data->dsi_disable_pads = omap_dsi_disable_pads; 317 board_data->set_min_bus_tput = omap_dss_set_min_bus_tput; 318 319 omap_display_device.dev.platform_data = board_data; 320 321 r = platform_device_register(&omap_display_device); 322 if (r < 0) { 323 pr_err("Unable to register omapdss device\n"); 324 return r; 325 } 326 327 /* create devices for dss hwmods */ 328 329 if (cpu_is_omap24xx()) { 330 curr_dss_hwmod = omap2_dss_hwmod_data; 331 oh_count = ARRAY_SIZE(omap2_dss_hwmod_data); 332 } else if (cpu_is_omap34xx()) { 333 curr_dss_hwmod = omap3_dss_hwmod_data; 334 oh_count = ARRAY_SIZE(omap3_dss_hwmod_data); 335 } else { 336 curr_dss_hwmod = omap4_dss_hwmod_data; 337 oh_count = ARRAY_SIZE(omap4_dss_hwmod_data); 338 } 339 340 /* 341 * First create the pdev for dss_core, which is used as a parent device 342 * by the other dss pdevs. Note: dss_core has to be the first item in 343 * the hwmod list. 344 */ 345 dss_pdev = create_dss_pdev(curr_dss_hwmod[0].dev_name, 346 curr_dss_hwmod[0].id, 347 curr_dss_hwmod[0].oh_name, 348 board_data, sizeof(*board_data), 349 NULL); 350 351 if (IS_ERR(dss_pdev)) { 352 pr_err("Could not build omap_device for %s\n", 353 curr_dss_hwmod[0].oh_name); 354 355 return PTR_ERR(dss_pdev); 356 } 357 358 for (i = 1; i < oh_count; i++) { 359 pdev = create_dss_pdev(curr_dss_hwmod[i].dev_name, 360 curr_dss_hwmod[i].id, 361 curr_dss_hwmod[i].oh_name, 362 board_data, sizeof(*board_data), 363 dss_pdev); 364 365 if (IS_ERR(pdev)) { 366 pr_err("Could not build omap_device for %s\n", 367 curr_dss_hwmod[i].oh_name); 368 369 return PTR_ERR(pdev); 370 } 371 } 372 373 /* Create devices for DPI and SDI */ 374 375 pdev = create_simple_dss_pdev("omapdss_dpi", 0, 376 board_data, sizeof(*board_data), dss_pdev); 377 if (IS_ERR(pdev)) { 378 pr_err("Could not build platform_device for omapdss_dpi\n"); 379 return PTR_ERR(pdev); 380 } 381 382 if (cpu_is_omap34xx()) { 383 pdev = create_simple_dss_pdev("omapdss_sdi", 0, 384 board_data, sizeof(*board_data), dss_pdev); 385 if (IS_ERR(pdev)) { 386 pr_err("Could not build platform_device for omapdss_sdi\n"); 387 return PTR_ERR(pdev); 388 } 389 } 390 391 /* create DRM device */ 392 r = omap_init_drm(); 393 if (r < 0) { 394 pr_err("Unable to register omapdrm device\n"); 395 return r; 396 } 397 398 /* create vrfb device */ 399 r = omap_init_vrfb(); 400 if (r < 0) { 401 pr_err("Unable to register omapvrfb device\n"); 402 return r; 403 } 404 405 /* create FB device */ 406 r = omap_init_fb(); 407 if (r < 0) { 408 pr_err("Unable to register omapfb device\n"); 409 return r; 410 } 411 412 /* create V4L2 display device */ 413 r = omap_init_vout(); 414 if (r < 0) { 415 pr_err("Unable to register omap_vout device\n"); 416 return r; 417 } 418 419 return 0; 420 } 421 422 static void dispc_disable_outputs(void) 423 { 424 u32 v, irq_mask = 0; 425 bool lcd_en, digit_en, lcd2_en = false, lcd3_en = false; 426 int i; 427 struct omap_dss_dispc_dev_attr *da; 428 struct omap_hwmod *oh; 429 430 oh = omap_hwmod_lookup("dss_dispc"); 431 if (!oh) { 432 WARN(1, "display: could not disable outputs during reset - could not find dss_dispc hwmod\n"); 433 return; 434 } 435 436 if (!oh->dev_attr) { 437 pr_err("display: could not disable outputs during reset due to missing dev_attr\n"); 438 return; 439 } 440 441 da = (struct omap_dss_dispc_dev_attr *)oh->dev_attr; 442 443 /* store value of LCDENABLE and DIGITENABLE bits */ 444 v = omap_hwmod_read(oh, DISPC_CONTROL); 445 lcd_en = v & LCD_EN_MASK; 446 digit_en = v & DIGIT_EN_MASK; 447 448 /* store value of LCDENABLE for LCD2 */ 449 if (da->manager_count > 2) { 450 v = omap_hwmod_read(oh, DISPC_CONTROL2); 451 lcd2_en = v & LCD_EN_MASK; 452 } 453 454 /* store value of LCDENABLE for LCD3 */ 455 if (da->manager_count > 3) { 456 v = omap_hwmod_read(oh, DISPC_CONTROL3); 457 lcd3_en = v & LCD_EN_MASK; 458 } 459 460 if (!(lcd_en | digit_en | lcd2_en | lcd3_en)) 461 return; /* no managers currently enabled */ 462 463 /* 464 * If any manager was enabled, we need to disable it before 465 * DSS clocks are disabled or DISPC module is reset 466 */ 467 if (lcd_en) 468 irq_mask |= 1 << FRAMEDONE_IRQ_SHIFT; 469 470 if (digit_en) { 471 if (da->has_framedonetv_irq) { 472 irq_mask |= 1 << FRAMEDONETV_IRQ_SHIFT; 473 } else { 474 irq_mask |= 1 << EVSYNC_EVEN_IRQ_SHIFT | 475 1 << EVSYNC_ODD_IRQ_SHIFT; 476 } 477 } 478 479 if (lcd2_en) 480 irq_mask |= 1 << FRAMEDONE2_IRQ_SHIFT; 481 if (lcd3_en) 482 irq_mask |= 1 << FRAMEDONE3_IRQ_SHIFT; 483 484 /* 485 * clear any previous FRAMEDONE, FRAMEDONETV, 486 * EVSYNC_EVEN/ODD, FRAMEDONE2 or FRAMEDONE3 interrupts 487 */ 488 omap_hwmod_write(irq_mask, oh, DISPC_IRQSTATUS); 489 490 /* disable LCD and TV managers */ 491 v = omap_hwmod_read(oh, DISPC_CONTROL); 492 v &= ~(LCD_EN_MASK | DIGIT_EN_MASK); 493 omap_hwmod_write(v, oh, DISPC_CONTROL); 494 495 /* disable LCD2 manager */ 496 if (da->manager_count > 2) { 497 v = omap_hwmod_read(oh, DISPC_CONTROL2); 498 v &= ~LCD_EN_MASK; 499 omap_hwmod_write(v, oh, DISPC_CONTROL2); 500 } 501 502 /* disable LCD3 manager */ 503 if (da->manager_count > 3) { 504 v = omap_hwmod_read(oh, DISPC_CONTROL3); 505 v &= ~LCD_EN_MASK; 506 omap_hwmod_write(v, oh, DISPC_CONTROL3); 507 } 508 509 i = 0; 510 while ((omap_hwmod_read(oh, DISPC_IRQSTATUS) & irq_mask) != 511 irq_mask) { 512 i++; 513 if (i > FRAMEDONE_IRQ_TIMEOUT) { 514 pr_err("didn't get FRAMEDONE1/2/3 or TV interrupt\n"); 515 break; 516 } 517 mdelay(1); 518 } 519 } 520 521 int omap_dss_reset(struct omap_hwmod *oh) 522 { 523 struct omap_hwmod_opt_clk *oc; 524 int c = 0; 525 int i, r; 526 527 if (!(oh->class->sysc->sysc_flags & SYSS_HAS_RESET_STATUS)) { 528 pr_err("dss_core: hwmod data doesn't contain reset data\n"); 529 return -EINVAL; 530 } 531 532 for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) 533 if (oc->_clk) 534 clk_prepare_enable(oc->_clk); 535 536 dispc_disable_outputs(); 537 538 /* clear SDI registers */ 539 if (cpu_is_omap3430()) { 540 omap_hwmod_write(0x0, oh, DSS_SDI_CONTROL); 541 omap_hwmod_write(0x0, oh, DSS_PLL_CONTROL); 542 } 543 544 /* 545 * clear DSS_CONTROL register to switch DSS clock sources to 546 * PRCM clock, if any 547 */ 548 omap_hwmod_write(0x0, oh, DSS_CONTROL); 549 550 omap_test_timeout((omap_hwmod_read(oh, oh->class->sysc->syss_offs) 551 & SYSS_RESETDONE_MASK), 552 MAX_MODULE_SOFTRESET_WAIT, c); 553 554 if (c == MAX_MODULE_SOFTRESET_WAIT) 555 pr_warn("dss_core: waiting for reset to finish failed\n"); 556 else 557 pr_debug("dss_core: softreset done\n"); 558 559 for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) 560 if (oc->_clk) 561 clk_disable_unprepare(oc->_clk); 562 563 r = (c == MAX_MODULE_SOFTRESET_WAIT) ? -ETIMEDOUT : 0; 564 565 return r; 566 } 567 568 static const char * const omapdss_compat_names[] __initconst = { 569 "ti,omap2-dss", 570 "ti,omap3-dss", 571 "ti,omap4-dss", 572 "ti,omap5-dss", 573 "ti,dra7-dss", 574 }; 575 576 struct device_node * __init omapdss_find_dss_of_node(void) 577 { 578 struct device_node *node; 579 int i; 580 581 for (i = 0; i < ARRAY_SIZE(omapdss_compat_names); ++i) { 582 node = of_find_compatible_node(NULL, NULL, 583 omapdss_compat_names[i]); 584 if (node) 585 return node; 586 } 587 588 return NULL; 589 } 590 591 int __init omapdss_init_of(void) 592 { 593 int r; 594 enum omapdss_version ver; 595 struct device_node *node; 596 struct platform_device *pdev; 597 598 static struct omap_dss_board_info board_data = { 599 .dsi_enable_pads = omap_dsi_enable_pads, 600 .dsi_disable_pads = omap_dsi_disable_pads, 601 .set_min_bus_tput = omap_dss_set_min_bus_tput, 602 }; 603 604 /* only create dss helper devices if dss is enabled in the .dts */ 605 606 node = omapdss_find_dss_of_node(); 607 if (!node) 608 return 0; 609 610 if (!of_device_is_available(node)) 611 return 0; 612 613 ver = omap_display_get_version(); 614 615 if (ver == OMAPDSS_VER_UNKNOWN) { 616 pr_err("DSS not supported on this SoC\n"); 617 return -ENODEV; 618 } 619 620 pdev = of_find_device_by_node(node); 621 622 if (!pdev) { 623 pr_err("Unable to find DSS platform device\n"); 624 return -ENODEV; 625 } 626 627 r = of_platform_populate(node, NULL, NULL, &pdev->dev); 628 if (r) { 629 pr_err("Unable to populate DSS submodule devices\n"); 630 return r; 631 } 632 633 board_data.version = ver; 634 635 omap_display_device.dev.platform_data = &board_data; 636 637 r = platform_device_register(&omap_display_device); 638 if (r < 0) { 639 pr_err("Unable to register omapdss device\n"); 640 return r; 641 } 642 643 /* create DRM device */ 644 r = omap_init_drm(); 645 if (r < 0) { 646 pr_err("Unable to register omapdrm device\n"); 647 return r; 648 } 649 650 /* create vrfb device */ 651 r = omap_init_vrfb(); 652 if (r < 0) { 653 pr_err("Unable to register omapvrfb device\n"); 654 return r; 655 } 656 657 /* create FB device */ 658 r = omap_init_fb(); 659 if (r < 0) { 660 pr_err("Unable to register omapfb device\n"); 661 return r; 662 } 663 664 /* create V4L2 display device */ 665 r = omap_init_vout(); 666 if (r < 0) { 667 pr_err("Unable to register omap_vout device\n"); 668 return r; 669 } 670 671 /* add DSI info for omap4 */ 672 node = of_find_node_by_name(NULL, "omap4_padconf_global"); 673 if (node) 674 omap4_dsi_mux_syscon = syscon_node_to_regmap(node); 675 676 return 0; 677 } 678