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 30 #include <video/omapdss.h> 31 #include "omap_hwmod.h" 32 #include "omap_device.h" 33 #include "omap-pm.h" 34 #include "common.h" 35 36 #include "soc.h" 37 #include "iomap.h" 38 #include "control.h" 39 #include "display.h" 40 #include "prm.h" 41 42 #define DISPC_CONTROL 0x0040 43 #define DISPC_CONTROL2 0x0238 44 #define DISPC_CONTROL3 0x0848 45 #define DISPC_IRQSTATUS 0x0018 46 47 #define DSS_SYSCONFIG 0x10 48 #define DSS_SYSSTATUS 0x14 49 #define DSS_CONTROL 0x40 50 #define DSS_SDI_CONTROL 0x44 51 #define DSS_PLL_CONTROL 0x48 52 53 #define LCD_EN_MASK (0x1 << 0) 54 #define DIGIT_EN_MASK (0x1 << 1) 55 56 #define FRAMEDONE_IRQ_SHIFT 0 57 #define EVSYNC_EVEN_IRQ_SHIFT 2 58 #define EVSYNC_ODD_IRQ_SHIFT 3 59 #define FRAMEDONE2_IRQ_SHIFT 22 60 #define FRAMEDONE3_IRQ_SHIFT 30 61 #define FRAMEDONETV_IRQ_SHIFT 24 62 63 /* 64 * FRAMEDONE_IRQ_TIMEOUT: how long (in milliseconds) to wait during DISPC 65 * reset before deciding that something has gone wrong 66 */ 67 #define FRAMEDONE_IRQ_TIMEOUT 100 68 69 static struct platform_device omap_display_device = { 70 .name = "omapdss", 71 .id = -1, 72 .dev = { 73 .platform_data = NULL, 74 }, 75 }; 76 77 struct omap_dss_hwmod_data { 78 const char *oh_name; 79 const char *dev_name; 80 const int id; 81 }; 82 83 static const struct omap_dss_hwmod_data omap2_dss_hwmod_data[] __initconst = { 84 { "dss_core", "omapdss_dss", -1 }, 85 { "dss_dispc", "omapdss_dispc", -1 }, 86 { "dss_rfbi", "omapdss_rfbi", -1 }, 87 { "dss_venc", "omapdss_venc", -1 }, 88 }; 89 90 static const struct omap_dss_hwmod_data omap3_dss_hwmod_data[] __initconst = { 91 { "dss_core", "omapdss_dss", -1 }, 92 { "dss_dispc", "omapdss_dispc", -1 }, 93 { "dss_rfbi", "omapdss_rfbi", -1 }, 94 { "dss_venc", "omapdss_venc", -1 }, 95 { "dss_dsi1", "omapdss_dsi", 0 }, 96 }; 97 98 static const struct omap_dss_hwmod_data omap4_dss_hwmod_data[] __initconst = { 99 { "dss_core", "omapdss_dss", -1 }, 100 { "dss_dispc", "omapdss_dispc", -1 }, 101 { "dss_rfbi", "omapdss_rfbi", -1 }, 102 { "dss_dsi1", "omapdss_dsi", 0 }, 103 { "dss_dsi2", "omapdss_dsi", 1 }, 104 { "dss_hdmi", "omapdss_hdmi", -1 }, 105 }; 106 107 static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes) 108 { 109 u32 enable_mask, enable_shift; 110 u32 pipd_mask, pipd_shift; 111 u32 reg; 112 113 if (dsi_id == 0) { 114 enable_mask = OMAP4_DSI1_LANEENABLE_MASK; 115 enable_shift = OMAP4_DSI1_LANEENABLE_SHIFT; 116 pipd_mask = OMAP4_DSI1_PIPD_MASK; 117 pipd_shift = OMAP4_DSI1_PIPD_SHIFT; 118 } else if (dsi_id == 1) { 119 enable_mask = OMAP4_DSI2_LANEENABLE_MASK; 120 enable_shift = OMAP4_DSI2_LANEENABLE_SHIFT; 121 pipd_mask = OMAP4_DSI2_PIPD_MASK; 122 pipd_shift = OMAP4_DSI2_PIPD_SHIFT; 123 } else { 124 return -ENODEV; 125 } 126 127 reg = omap4_ctrl_pad_readl(OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_DSIPHY); 128 129 reg &= ~enable_mask; 130 reg &= ~pipd_mask; 131 132 reg |= (lanes << enable_shift) & enable_mask; 133 reg |= (lanes << pipd_shift) & pipd_mask; 134 135 omap4_ctrl_pad_writel(reg, OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_DSIPHY); 136 137 return 0; 138 } 139 140 static int omap_dsi_enable_pads(int dsi_id, unsigned lane_mask) 141 { 142 if (cpu_is_omap44xx()) 143 return omap4_dsi_mux_pads(dsi_id, lane_mask); 144 145 return 0; 146 } 147 148 static void omap_dsi_disable_pads(int dsi_id, unsigned lane_mask) 149 { 150 if (cpu_is_omap44xx()) 151 omap4_dsi_mux_pads(dsi_id, 0); 152 } 153 154 static int omap_dss_set_min_bus_tput(struct device *dev, unsigned long tput) 155 { 156 return omap_pm_set_min_bus_tput(dev, OCP_INITIATOR_AGENT, tput); 157 } 158 159 static struct platform_device *create_dss_pdev(const char *pdev_name, 160 int pdev_id, const char *oh_name, void *pdata, int pdata_len, 161 struct platform_device *parent) 162 { 163 struct platform_device *pdev; 164 struct omap_device *od; 165 struct omap_hwmod *ohs[1]; 166 struct omap_hwmod *oh; 167 int r; 168 169 oh = omap_hwmod_lookup(oh_name); 170 if (!oh) { 171 pr_err("Could not look up %s\n", oh_name); 172 r = -ENODEV; 173 goto err; 174 } 175 176 pdev = platform_device_alloc(pdev_name, pdev_id); 177 if (!pdev) { 178 pr_err("Could not create pdev for %s\n", pdev_name); 179 r = -ENOMEM; 180 goto err; 181 } 182 183 if (parent != NULL) 184 pdev->dev.parent = &parent->dev; 185 186 if (pdev->id != -1) 187 dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); 188 else 189 dev_set_name(&pdev->dev, "%s", pdev->name); 190 191 ohs[0] = oh; 192 od = omap_device_alloc(pdev, ohs, 1); 193 if (IS_ERR(od)) { 194 pr_err("Could not alloc omap_device for %s\n", pdev_name); 195 r = -ENOMEM; 196 goto err; 197 } 198 199 r = platform_device_add_data(pdev, pdata, pdata_len); 200 if (r) { 201 pr_err("Could not set pdata for %s\n", pdev_name); 202 goto err; 203 } 204 205 r = omap_device_register(pdev); 206 if (r) { 207 pr_err("Could not register omap_device for %s\n", pdev_name); 208 goto err; 209 } 210 211 return pdev; 212 213 err: 214 return ERR_PTR(r); 215 } 216 217 static struct platform_device *create_simple_dss_pdev(const char *pdev_name, 218 int pdev_id, void *pdata, int pdata_len, 219 struct platform_device *parent) 220 { 221 struct platform_device *pdev; 222 int r; 223 224 pdev = platform_device_alloc(pdev_name, pdev_id); 225 if (!pdev) { 226 pr_err("Could not create pdev for %s\n", pdev_name); 227 r = -ENOMEM; 228 goto err; 229 } 230 231 if (parent != NULL) 232 pdev->dev.parent = &parent->dev; 233 234 if (pdev->id != -1) 235 dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); 236 else 237 dev_set_name(&pdev->dev, "%s", pdev->name); 238 239 r = platform_device_add_data(pdev, pdata, pdata_len); 240 if (r) { 241 pr_err("Could not set pdata for %s\n", pdev_name); 242 goto err; 243 } 244 245 r = platform_device_add(pdev); 246 if (r) { 247 pr_err("Could not register platform_device for %s\n", pdev_name); 248 goto err; 249 } 250 251 return pdev; 252 253 err: 254 return ERR_PTR(r); 255 } 256 257 static enum omapdss_version __init omap_display_get_version(void) 258 { 259 if (cpu_is_omap24xx()) 260 return OMAPDSS_VER_OMAP24xx; 261 else if (cpu_is_omap3630()) 262 return OMAPDSS_VER_OMAP3630; 263 else if (cpu_is_omap34xx()) { 264 if (soc_is_am35xx()) { 265 return OMAPDSS_VER_AM35xx; 266 } else { 267 if (omap_rev() < OMAP3430_REV_ES3_0) 268 return OMAPDSS_VER_OMAP34xx_ES1; 269 else 270 return OMAPDSS_VER_OMAP34xx_ES3; 271 } 272 } else if (omap_rev() == OMAP4430_REV_ES1_0) 273 return OMAPDSS_VER_OMAP4430_ES1; 274 else if (omap_rev() == OMAP4430_REV_ES2_0 || 275 omap_rev() == OMAP4430_REV_ES2_1 || 276 omap_rev() == OMAP4430_REV_ES2_2) 277 return OMAPDSS_VER_OMAP4430_ES2; 278 else if (cpu_is_omap44xx()) 279 return OMAPDSS_VER_OMAP4; 280 else if (soc_is_omap54xx()) 281 return OMAPDSS_VER_OMAP5; 282 else if (soc_is_am43xx()) 283 return OMAPDSS_VER_AM43xx; 284 else 285 return OMAPDSS_VER_UNKNOWN; 286 } 287 288 int __init omap_display_init(struct omap_dss_board_info *board_data) 289 { 290 int r = 0; 291 struct platform_device *pdev; 292 int i, oh_count; 293 const struct omap_dss_hwmod_data *curr_dss_hwmod; 294 struct platform_device *dss_pdev; 295 enum omapdss_version ver; 296 297 /* create omapdss device */ 298 299 ver = omap_display_get_version(); 300 301 if (ver == OMAPDSS_VER_UNKNOWN) { 302 pr_err("DSS not supported on this SoC\n"); 303 return -ENODEV; 304 } 305 306 board_data->version = ver; 307 board_data->dsi_enable_pads = omap_dsi_enable_pads; 308 board_data->dsi_disable_pads = omap_dsi_disable_pads; 309 board_data->set_min_bus_tput = omap_dss_set_min_bus_tput; 310 311 omap_display_device.dev.platform_data = board_data; 312 313 r = platform_device_register(&omap_display_device); 314 if (r < 0) { 315 pr_err("Unable to register omapdss device\n"); 316 return r; 317 } 318 319 /* create devices for dss hwmods */ 320 321 if (cpu_is_omap24xx()) { 322 curr_dss_hwmod = omap2_dss_hwmod_data; 323 oh_count = ARRAY_SIZE(omap2_dss_hwmod_data); 324 } else if (cpu_is_omap34xx()) { 325 curr_dss_hwmod = omap3_dss_hwmod_data; 326 oh_count = ARRAY_SIZE(omap3_dss_hwmod_data); 327 } else { 328 curr_dss_hwmod = omap4_dss_hwmod_data; 329 oh_count = ARRAY_SIZE(omap4_dss_hwmod_data); 330 } 331 332 /* 333 * First create the pdev for dss_core, which is used as a parent device 334 * by the other dss pdevs. Note: dss_core has to be the first item in 335 * the hwmod list. 336 */ 337 dss_pdev = create_dss_pdev(curr_dss_hwmod[0].dev_name, 338 curr_dss_hwmod[0].id, 339 curr_dss_hwmod[0].oh_name, 340 board_data, sizeof(*board_data), 341 NULL); 342 343 if (IS_ERR(dss_pdev)) { 344 pr_err("Could not build omap_device for %s\n", 345 curr_dss_hwmod[0].oh_name); 346 347 return PTR_ERR(dss_pdev); 348 } 349 350 for (i = 1; i < oh_count; i++) { 351 pdev = create_dss_pdev(curr_dss_hwmod[i].dev_name, 352 curr_dss_hwmod[i].id, 353 curr_dss_hwmod[i].oh_name, 354 board_data, sizeof(*board_data), 355 dss_pdev); 356 357 if (IS_ERR(pdev)) { 358 pr_err("Could not build omap_device for %s\n", 359 curr_dss_hwmod[i].oh_name); 360 361 return PTR_ERR(pdev); 362 } 363 } 364 365 /* Create devices for DPI and SDI */ 366 367 pdev = create_simple_dss_pdev("omapdss_dpi", 0, 368 board_data, sizeof(*board_data), dss_pdev); 369 if (IS_ERR(pdev)) { 370 pr_err("Could not build platform_device for omapdss_dpi\n"); 371 return PTR_ERR(pdev); 372 } 373 374 if (cpu_is_omap34xx()) { 375 pdev = create_simple_dss_pdev("omapdss_sdi", 0, 376 board_data, sizeof(*board_data), dss_pdev); 377 if (IS_ERR(pdev)) { 378 pr_err("Could not build platform_device for omapdss_sdi\n"); 379 return PTR_ERR(pdev); 380 } 381 } 382 383 /* create DRM device */ 384 r = omap_init_drm(); 385 if (r < 0) { 386 pr_err("Unable to register omapdrm device\n"); 387 return r; 388 } 389 390 /* create vrfb device */ 391 r = omap_init_vrfb(); 392 if (r < 0) { 393 pr_err("Unable to register omapvrfb device\n"); 394 return r; 395 } 396 397 /* create FB device */ 398 r = omap_init_fb(); 399 if (r < 0) { 400 pr_err("Unable to register omapfb device\n"); 401 return r; 402 } 403 404 /* create V4L2 display device */ 405 r = omap_init_vout(); 406 if (r < 0) { 407 pr_err("Unable to register omap_vout device\n"); 408 return r; 409 } 410 411 return 0; 412 } 413 414 static void dispc_disable_outputs(void) 415 { 416 u32 v, irq_mask = 0; 417 bool lcd_en, digit_en, lcd2_en = false, lcd3_en = false; 418 int i; 419 struct omap_dss_dispc_dev_attr *da; 420 struct omap_hwmod *oh; 421 422 oh = omap_hwmod_lookup("dss_dispc"); 423 if (!oh) { 424 WARN(1, "display: could not disable outputs during reset - could not find dss_dispc hwmod\n"); 425 return; 426 } 427 428 if (!oh->dev_attr) { 429 pr_err("display: could not disable outputs during reset due to missing dev_attr\n"); 430 return; 431 } 432 433 da = (struct omap_dss_dispc_dev_attr *)oh->dev_attr; 434 435 /* store value of LCDENABLE and DIGITENABLE bits */ 436 v = omap_hwmod_read(oh, DISPC_CONTROL); 437 lcd_en = v & LCD_EN_MASK; 438 digit_en = v & DIGIT_EN_MASK; 439 440 /* store value of LCDENABLE for LCD2 */ 441 if (da->manager_count > 2) { 442 v = omap_hwmod_read(oh, DISPC_CONTROL2); 443 lcd2_en = v & LCD_EN_MASK; 444 } 445 446 /* store value of LCDENABLE for LCD3 */ 447 if (da->manager_count > 3) { 448 v = omap_hwmod_read(oh, DISPC_CONTROL3); 449 lcd3_en = v & LCD_EN_MASK; 450 } 451 452 if (!(lcd_en | digit_en | lcd2_en | lcd3_en)) 453 return; /* no managers currently enabled */ 454 455 /* 456 * If any manager was enabled, we need to disable it before 457 * DSS clocks are disabled or DISPC module is reset 458 */ 459 if (lcd_en) 460 irq_mask |= 1 << FRAMEDONE_IRQ_SHIFT; 461 462 if (digit_en) { 463 if (da->has_framedonetv_irq) { 464 irq_mask |= 1 << FRAMEDONETV_IRQ_SHIFT; 465 } else { 466 irq_mask |= 1 << EVSYNC_EVEN_IRQ_SHIFT | 467 1 << EVSYNC_ODD_IRQ_SHIFT; 468 } 469 } 470 471 if (lcd2_en) 472 irq_mask |= 1 << FRAMEDONE2_IRQ_SHIFT; 473 if (lcd3_en) 474 irq_mask |= 1 << FRAMEDONE3_IRQ_SHIFT; 475 476 /* 477 * clear any previous FRAMEDONE, FRAMEDONETV, 478 * EVSYNC_EVEN/ODD, FRAMEDONE2 or FRAMEDONE3 interrupts 479 */ 480 omap_hwmod_write(irq_mask, oh, DISPC_IRQSTATUS); 481 482 /* disable LCD and TV managers */ 483 v = omap_hwmod_read(oh, DISPC_CONTROL); 484 v &= ~(LCD_EN_MASK | DIGIT_EN_MASK); 485 omap_hwmod_write(v, oh, DISPC_CONTROL); 486 487 /* disable LCD2 manager */ 488 if (da->manager_count > 2) { 489 v = omap_hwmod_read(oh, DISPC_CONTROL2); 490 v &= ~LCD_EN_MASK; 491 omap_hwmod_write(v, oh, DISPC_CONTROL2); 492 } 493 494 /* disable LCD3 manager */ 495 if (da->manager_count > 3) { 496 v = omap_hwmod_read(oh, DISPC_CONTROL3); 497 v &= ~LCD_EN_MASK; 498 omap_hwmod_write(v, oh, DISPC_CONTROL3); 499 } 500 501 i = 0; 502 while ((omap_hwmod_read(oh, DISPC_IRQSTATUS) & irq_mask) != 503 irq_mask) { 504 i++; 505 if (i > FRAMEDONE_IRQ_TIMEOUT) { 506 pr_err("didn't get FRAMEDONE1/2/3 or TV interrupt\n"); 507 break; 508 } 509 mdelay(1); 510 } 511 } 512 513 int omap_dss_reset(struct omap_hwmod *oh) 514 { 515 struct omap_hwmod_opt_clk *oc; 516 int c = 0; 517 int i, r; 518 519 if (!(oh->class->sysc->sysc_flags & SYSS_HAS_RESET_STATUS)) { 520 pr_err("dss_core: hwmod data doesn't contain reset data\n"); 521 return -EINVAL; 522 } 523 524 for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) 525 if (oc->_clk) 526 clk_prepare_enable(oc->_clk); 527 528 dispc_disable_outputs(); 529 530 /* clear SDI registers */ 531 if (cpu_is_omap3430()) { 532 omap_hwmod_write(0x0, oh, DSS_SDI_CONTROL); 533 omap_hwmod_write(0x0, oh, DSS_PLL_CONTROL); 534 } 535 536 /* 537 * clear DSS_CONTROL register to switch DSS clock sources to 538 * PRCM clock, if any 539 */ 540 omap_hwmod_write(0x0, oh, DSS_CONTROL); 541 542 omap_test_timeout((omap_hwmod_read(oh, oh->class->sysc->syss_offs) 543 & SYSS_RESETDONE_MASK), 544 MAX_MODULE_SOFTRESET_WAIT, c); 545 546 if (c == MAX_MODULE_SOFTRESET_WAIT) 547 pr_warning("dss_core: waiting for reset to finish failed\n"); 548 else 549 pr_debug("dss_core: softreset done\n"); 550 551 for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) 552 if (oc->_clk) 553 clk_disable_unprepare(oc->_clk); 554 555 r = (c == MAX_MODULE_SOFTRESET_WAIT) ? -ETIMEDOUT : 0; 556 557 return r; 558 } 559 560 void __init omapdss_early_init_of(void) 561 { 562 563 } 564 565 struct device_node * __init omapdss_find_dss_of_node(void) 566 { 567 struct device_node *node; 568 569 node = of_find_compatible_node(NULL, NULL, "ti,omap2-dss"); 570 if (node) 571 return node; 572 573 node = of_find_compatible_node(NULL, NULL, "ti,omap3-dss"); 574 if (node) 575 return node; 576 577 node = of_find_compatible_node(NULL, NULL, "ti,omap4-dss"); 578 if (node) 579 return node; 580 581 node = of_find_compatible_node(NULL, NULL, "ti,omap5-dss"); 582 if (node) 583 return node; 584 585 return NULL; 586 } 587 588 int __init omapdss_init_of(void) 589 { 590 int r; 591 enum omapdss_version ver; 592 struct device_node *node; 593 struct platform_device *pdev; 594 595 static struct omap_dss_board_info board_data = { 596 .dsi_enable_pads = omap_dsi_enable_pads, 597 .dsi_disable_pads = omap_dsi_disable_pads, 598 .set_min_bus_tput = omap_dss_set_min_bus_tput, 599 }; 600 601 /* only create dss helper devices if dss is enabled in the .dts */ 602 603 node = omapdss_find_dss_of_node(); 604 if (!node) 605 return 0; 606 607 if (!of_device_is_available(node)) 608 return 0; 609 610 ver = omap_display_get_version(); 611 612 if (ver == OMAPDSS_VER_UNKNOWN) { 613 pr_err("DSS not supported on this SoC\n"); 614 return -ENODEV; 615 } 616 617 pdev = of_find_device_by_node(node); 618 619 if (!pdev) { 620 pr_err("Unable to find DSS platform device\n"); 621 return -ENODEV; 622 } 623 624 r = of_platform_populate(node, NULL, NULL, &pdev->dev); 625 if (r) { 626 pr_err("Unable to populate DSS submodule devices\n"); 627 return r; 628 } 629 630 board_data.version = ver; 631 632 omap_display_device.dev.platform_data = &board_data; 633 634 r = platform_device_register(&omap_display_device); 635 if (r < 0) { 636 pr_err("Unable to register omapdss device\n"); 637 return r; 638 } 639 640 /* create DRM device */ 641 r = omap_init_drm(); 642 if (r < 0) { 643 pr_err("Unable to register omapdrm device\n"); 644 return r; 645 } 646 647 /* create vrfb device */ 648 r = omap_init_vrfb(); 649 if (r < 0) { 650 pr_err("Unable to register omapvrfb device\n"); 651 return r; 652 } 653 654 /* create FB device */ 655 r = omap_init_fb(); 656 if (r < 0) { 657 pr_err("Unable to register omapfb device\n"); 658 return r; 659 } 660 661 /* create V4L2 display device */ 662 r = omap_init_vout(); 663 if (r < 0) { 664 pr_err("Unable to register omap_vout device\n"); 665 return r; 666 } 667 668 return 0; 669 } 670