1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Framebuffer driver for TI OMAP boards 4 * 5 * Copyright (C) 2004 Nokia Corporation 6 * Author: Imre Deak <imre.deak@nokia.com> 7 * 8 * Acknowledgements: 9 * Alex McMains <aam@ridgerun.com> - Original driver 10 * Juha Yrjola <juha.yrjola@nokia.com> - Original driver and improvements 11 * Dirk Behme <dirk.behme@de.bosch.com> - changes for 2.6 kernel API 12 * Texas Instruments - H3 support 13 */ 14 #include <linux/platform_device.h> 15 #include <linux/mm.h> 16 #include <linux/slab.h> 17 #include <linux/uaccess.h> 18 #include <linux/module.h> 19 #include <linux/sysfs.h> 20 21 #include <linux/omap-dma.h> 22 23 #include <linux/soc/ti/omap1-soc.h> 24 #include "omapfb.h" 25 #include "lcdc.h" 26 27 #define MODULE_NAME "omapfb" 28 29 static unsigned int def_accel; 30 static unsigned long def_vram[OMAPFB_PLANE_NUM]; 31 static unsigned int def_vram_cnt; 32 static unsigned long def_vxres; 33 static unsigned long def_vyres; 34 static unsigned int def_rotate; 35 static unsigned int def_mirror; 36 37 static bool manual_update = IS_BUILTIN(CONFIG_FB_OMAP_MANUAL_UPDATE); 38 39 static struct platform_device *fbdev_pdev; 40 static struct lcd_panel *fbdev_panel; 41 static struct omapfb_device *omapfb_dev; 42 43 struct caps_table_struct { 44 unsigned long flag; 45 const char *name; 46 }; 47 48 static const struct caps_table_struct ctrl_caps[] = { 49 { OMAPFB_CAPS_MANUAL_UPDATE, "manual update" }, 50 { OMAPFB_CAPS_TEARSYNC, "tearing synchronization" }, 51 { OMAPFB_CAPS_PLANE_RELOCATE_MEM, "relocate plane memory" }, 52 { OMAPFB_CAPS_PLANE_SCALE, "scale plane" }, 53 { OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE, "pixel double window" }, 54 { OMAPFB_CAPS_WINDOW_SCALE, "scale window" }, 55 { OMAPFB_CAPS_WINDOW_OVERLAY, "overlay window" }, 56 { OMAPFB_CAPS_WINDOW_ROTATE, "rotate window" }, 57 { OMAPFB_CAPS_SET_BACKLIGHT, "backlight setting" }, 58 }; 59 60 static const struct caps_table_struct color_caps[] = { 61 { 1 << OMAPFB_COLOR_RGB565, "RGB565", }, 62 { 1 << OMAPFB_COLOR_YUV422, "YUV422", }, 63 { 1 << OMAPFB_COLOR_YUV420, "YUV420", }, 64 { 1 << OMAPFB_COLOR_CLUT_8BPP, "CLUT8", }, 65 { 1 << OMAPFB_COLOR_CLUT_4BPP, "CLUT4", }, 66 { 1 << OMAPFB_COLOR_CLUT_2BPP, "CLUT2", }, 67 { 1 << OMAPFB_COLOR_CLUT_1BPP, "CLUT1", }, 68 { 1 << OMAPFB_COLOR_RGB444, "RGB444", }, 69 { 1 << OMAPFB_COLOR_YUY422, "YUY422", }, 70 }; 71 72 static void omapdss_release(struct device *dev) 73 { 74 } 75 76 /* dummy device for clocks */ 77 static struct platform_device omapdss_device = { 78 .name = "omapdss_dss", 79 .id = -1, 80 .dev = { 81 .release = omapdss_release, 82 }, 83 }; 84 85 /* 86 * --------------------------------------------------------------------------- 87 * LCD panel 88 * --------------------------------------------------------------------------- 89 */ 90 extern struct lcd_ctrl hwa742_ctrl; 91 92 static const struct lcd_ctrl *ctrls[] = { 93 &omap1_int_ctrl, 94 95 #ifdef CONFIG_FB_OMAP_LCDC_HWA742 96 &hwa742_ctrl, 97 #endif 98 }; 99 100 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL 101 extern struct lcd_ctrl_extif omap1_ext_if; 102 #endif 103 104 static void omapfb_rqueue_lock(struct omapfb_device *fbdev) 105 { 106 mutex_lock(&fbdev->rqueue_mutex); 107 } 108 109 static void omapfb_rqueue_unlock(struct omapfb_device *fbdev) 110 { 111 mutex_unlock(&fbdev->rqueue_mutex); 112 } 113 114 /* 115 * --------------------------------------------------------------------------- 116 * LCD controller and LCD DMA 117 * --------------------------------------------------------------------------- 118 */ 119 /* 120 * Allocate resources needed for LCD controller and LCD DMA operations. Video 121 * memory is allocated from system memory according to the virtual display 122 * size, except if a bigger memory size is specified explicitly as a kernel 123 * parameter. 124 */ 125 static int ctrl_init(struct omapfb_device *fbdev) 126 { 127 int r; 128 int i; 129 130 /* kernel/module vram parameters override boot tags/board config */ 131 if (def_vram_cnt) { 132 for (i = 0; i < def_vram_cnt; i++) 133 fbdev->mem_desc.region[i].size = 134 PAGE_ALIGN(def_vram[i]); 135 fbdev->mem_desc.region_cnt = i; 136 } 137 138 if (!fbdev->mem_desc.region_cnt) { 139 struct lcd_panel *panel = fbdev->panel; 140 int def_size; 141 int bpp = panel->bpp; 142 143 /* 12 bpp is packed in 16 bits */ 144 if (bpp == 12) 145 bpp = 16; 146 def_size = def_vxres * def_vyres * bpp / 8; 147 fbdev->mem_desc.region_cnt = 1; 148 fbdev->mem_desc.region[0].size = PAGE_ALIGN(def_size); 149 } 150 r = fbdev->ctrl->init(fbdev, 0, &fbdev->mem_desc); 151 if (r < 0) { 152 dev_err(fbdev->dev, "controller initialization failed (%d)\n", 153 r); 154 return r; 155 } 156 157 #ifdef DEBUG 158 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) { 159 dev_dbg(fbdev->dev, "region%d phys %08x virt %p size=%lu\n", 160 i, 161 fbdev->mem_desc.region[i].paddr, 162 fbdev->mem_desc.region[i].vaddr, 163 fbdev->mem_desc.region[i].size); 164 } 165 #endif 166 return 0; 167 } 168 169 static void ctrl_cleanup(struct omapfb_device *fbdev) 170 { 171 fbdev->ctrl->cleanup(); 172 } 173 174 /* Must be called with fbdev->rqueue_mutex held. */ 175 static int ctrl_change_mode(struct fb_info *fbi) 176 { 177 int r; 178 unsigned long offset; 179 struct omapfb_plane_struct *plane = fbi->par; 180 struct omapfb_device *fbdev = plane->fbdev; 181 struct fb_var_screeninfo *var = &fbi->var; 182 183 offset = var->yoffset * fbi->fix.line_length + 184 var->xoffset * var->bits_per_pixel / 8; 185 186 if (fbdev->ctrl->sync) 187 fbdev->ctrl->sync(); 188 r = fbdev->ctrl->setup_plane(plane->idx, plane->info.channel_out, 189 offset, var->xres_virtual, 190 plane->info.pos_x, plane->info.pos_y, 191 var->xres, var->yres, plane->color_mode); 192 if (r < 0) 193 return r; 194 195 if (fbdev->ctrl->set_rotate != NULL) { 196 r = fbdev->ctrl->set_rotate(var->rotate); 197 if (r < 0) 198 return r; 199 } 200 201 if (fbdev->ctrl->set_scale != NULL) 202 r = fbdev->ctrl->set_scale(plane->idx, 203 var->xres, var->yres, 204 plane->info.out_width, 205 plane->info.out_height); 206 207 return r; 208 } 209 210 /* 211 * --------------------------------------------------------------------------- 212 * fbdev framework callbacks and the ioctl interface 213 * --------------------------------------------------------------------------- 214 */ 215 /* Called each time the omapfb device is opened */ 216 static int omapfb_open(struct fb_info *info, int user) 217 { 218 return 0; 219 } 220 221 static void omapfb_sync(struct fb_info *info); 222 223 /* Called when the omapfb device is closed. We make sure that any pending 224 * gfx DMA operations are ended, before we return. */ 225 static int omapfb_release(struct fb_info *info, int user) 226 { 227 omapfb_sync(info); 228 return 0; 229 } 230 231 /* Store a single color palette entry into a pseudo palette or the hardware 232 * palette if one is available. For now we support only 16bpp and thus store 233 * the entry only to the pseudo palette. 234 */ 235 static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green, 236 u_int blue, u_int transp, int update_hw_pal) 237 { 238 struct omapfb_plane_struct *plane = info->par; 239 struct omapfb_device *fbdev = plane->fbdev; 240 struct fb_var_screeninfo *var = &info->var; 241 int r = 0; 242 243 switch (plane->color_mode) { 244 case OMAPFB_COLOR_YUV422: 245 case OMAPFB_COLOR_YUV420: 246 case OMAPFB_COLOR_YUY422: 247 r = -EINVAL; 248 break; 249 case OMAPFB_COLOR_CLUT_8BPP: 250 case OMAPFB_COLOR_CLUT_4BPP: 251 case OMAPFB_COLOR_CLUT_2BPP: 252 case OMAPFB_COLOR_CLUT_1BPP: 253 if (fbdev->ctrl->setcolreg) 254 r = fbdev->ctrl->setcolreg(regno, red, green, blue, 255 transp, update_hw_pal); 256 fallthrough; 257 case OMAPFB_COLOR_RGB565: 258 case OMAPFB_COLOR_RGB444: 259 if (r != 0) 260 break; 261 262 if (regno < 16) { 263 u16 pal; 264 pal = ((red >> (16 - var->red.length)) << 265 var->red.offset) | 266 ((green >> (16 - var->green.length)) << 267 var->green.offset) | 268 (blue >> (16 - var->blue.length)); 269 ((u32 *)(info->pseudo_palette))[regno] = pal; 270 } 271 break; 272 default: 273 BUG(); 274 } 275 return r; 276 } 277 278 static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, 279 u_int transp, struct fb_info *info) 280 { 281 return _setcolreg(info, regno, red, green, blue, transp, 1); 282 } 283 284 static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info) 285 { 286 int count, index, r; 287 u16 *red, *green, *blue, *transp; 288 u16 trans = 0xffff; 289 290 red = cmap->red; 291 green = cmap->green; 292 blue = cmap->blue; 293 transp = cmap->transp; 294 index = cmap->start; 295 296 for (count = 0; count < cmap->len; count++) { 297 if (transp) 298 trans = *transp++; 299 r = _setcolreg(info, index++, *red++, *green++, *blue++, trans, 300 count == cmap->len - 1); 301 if (r != 0) 302 return r; 303 } 304 305 return 0; 306 } 307 308 static int omapfb_update_full_screen(struct fb_info *fbi); 309 310 static int omapfb_blank(int blank, struct fb_info *fbi) 311 { 312 struct omapfb_plane_struct *plane = fbi->par; 313 struct omapfb_device *fbdev = plane->fbdev; 314 int do_update = 0; 315 int r = 0; 316 317 omapfb_rqueue_lock(fbdev); 318 switch (blank) { 319 case FB_BLANK_UNBLANK: 320 if (fbdev->state == OMAPFB_SUSPENDED) { 321 if (fbdev->ctrl->resume) 322 fbdev->ctrl->resume(); 323 if (fbdev->panel->enable) 324 fbdev->panel->enable(fbdev->panel); 325 fbdev->state = OMAPFB_ACTIVE; 326 if (fbdev->ctrl->get_update_mode() == 327 OMAPFB_MANUAL_UPDATE) 328 do_update = 1; 329 } 330 break; 331 case FB_BLANK_POWERDOWN: 332 if (fbdev->state == OMAPFB_ACTIVE) { 333 if (fbdev->panel->disable) 334 fbdev->panel->disable(fbdev->panel); 335 if (fbdev->ctrl->suspend) 336 fbdev->ctrl->suspend(); 337 fbdev->state = OMAPFB_SUSPENDED; 338 } 339 break; 340 default: 341 r = -EINVAL; 342 } 343 omapfb_rqueue_unlock(fbdev); 344 345 if (r == 0 && do_update) 346 r = omapfb_update_full_screen(fbi); 347 348 return r; 349 } 350 351 static void omapfb_sync(struct fb_info *fbi) 352 { 353 struct omapfb_plane_struct *plane = fbi->par; 354 struct omapfb_device *fbdev = plane->fbdev; 355 356 omapfb_rqueue_lock(fbdev); 357 if (fbdev->ctrl->sync) 358 fbdev->ctrl->sync(); 359 omapfb_rqueue_unlock(fbdev); 360 } 361 362 /* 363 * Set fb_info.fix fields and also updates fbdev. 364 * When calling this fb_info.var must be set up already. 365 */ 366 static void set_fb_fix(struct fb_info *fbi, int from_init) 367 { 368 struct fb_fix_screeninfo *fix = &fbi->fix; 369 struct fb_var_screeninfo *var = &fbi->var; 370 struct omapfb_plane_struct *plane = fbi->par; 371 struct omapfb_mem_region *rg; 372 int bpp; 373 374 rg = &plane->fbdev->mem_desc.region[plane->idx]; 375 fbi->screen_base = rg->vaddr; 376 377 if (!from_init) { 378 mutex_lock(&fbi->mm_lock); 379 fix->smem_start = rg->paddr; 380 fix->smem_len = rg->size; 381 mutex_unlock(&fbi->mm_lock); 382 } else { 383 fix->smem_start = rg->paddr; 384 fix->smem_len = rg->size; 385 } 386 387 fix->type = FB_TYPE_PACKED_PIXELS; 388 bpp = var->bits_per_pixel; 389 if (var->nonstd) 390 fix->visual = FB_VISUAL_PSEUDOCOLOR; 391 else switch (var->bits_per_pixel) { 392 case 16: 393 case 12: 394 fix->visual = FB_VISUAL_TRUECOLOR; 395 /* 12bpp is stored in 16 bits */ 396 bpp = 16; 397 break; 398 case 1: 399 case 2: 400 case 4: 401 case 8: 402 fix->visual = FB_VISUAL_PSEUDOCOLOR; 403 break; 404 } 405 fix->accel = FB_ACCEL_OMAP1610; 406 fix->line_length = var->xres_virtual * bpp / 8; 407 } 408 409 static int set_color_mode(struct omapfb_plane_struct *plane, 410 struct fb_var_screeninfo *var) 411 { 412 switch (var->nonstd) { 413 case 0: 414 break; 415 case OMAPFB_COLOR_YUV422: 416 var->bits_per_pixel = 16; 417 plane->color_mode = var->nonstd; 418 return 0; 419 case OMAPFB_COLOR_YUV420: 420 var->bits_per_pixel = 12; 421 plane->color_mode = var->nonstd; 422 return 0; 423 case OMAPFB_COLOR_YUY422: 424 var->bits_per_pixel = 16; 425 plane->color_mode = var->nonstd; 426 return 0; 427 default: 428 return -EINVAL; 429 } 430 431 switch (var->bits_per_pixel) { 432 case 1: 433 plane->color_mode = OMAPFB_COLOR_CLUT_1BPP; 434 return 0; 435 case 2: 436 plane->color_mode = OMAPFB_COLOR_CLUT_2BPP; 437 return 0; 438 case 4: 439 plane->color_mode = OMAPFB_COLOR_CLUT_4BPP; 440 return 0; 441 case 8: 442 plane->color_mode = OMAPFB_COLOR_CLUT_8BPP; 443 return 0; 444 case 12: 445 var->bits_per_pixel = 16; 446 fallthrough; 447 case 16: 448 if (plane->fbdev->panel->bpp == 12) 449 plane->color_mode = OMAPFB_COLOR_RGB444; 450 else 451 plane->color_mode = OMAPFB_COLOR_RGB565; 452 return 0; 453 default: 454 return -EINVAL; 455 } 456 } 457 458 /* 459 * Check the values in var against our capabilities and in case of out of 460 * bound values try to adjust them. 461 */ 462 static int set_fb_var(struct fb_info *fbi, 463 struct fb_var_screeninfo *var) 464 { 465 int bpp; 466 unsigned long max_frame_size; 467 unsigned long line_size; 468 int xres_min, xres_max; 469 int yres_min, yres_max; 470 struct omapfb_plane_struct *plane = fbi->par; 471 struct omapfb_device *fbdev = plane->fbdev; 472 struct lcd_panel *panel = fbdev->panel; 473 474 if (set_color_mode(plane, var) < 0) 475 return -EINVAL; 476 477 bpp = var->bits_per_pixel; 478 if (plane->color_mode == OMAPFB_COLOR_RGB444) 479 bpp = 16; 480 481 switch (var->rotate) { 482 case 0: 483 case 180: 484 xres_min = OMAPFB_PLANE_XRES_MIN; 485 xres_max = panel->x_res; 486 yres_min = OMAPFB_PLANE_YRES_MIN; 487 yres_max = panel->y_res; 488 if (cpu_is_omap15xx()) { 489 var->xres = panel->x_res; 490 var->yres = panel->y_res; 491 } 492 break; 493 case 90: 494 case 270: 495 xres_min = OMAPFB_PLANE_YRES_MIN; 496 xres_max = panel->y_res; 497 yres_min = OMAPFB_PLANE_XRES_MIN; 498 yres_max = panel->x_res; 499 if (cpu_is_omap15xx()) { 500 var->xres = panel->y_res; 501 var->yres = panel->x_res; 502 } 503 break; 504 default: 505 return -EINVAL; 506 } 507 508 if (var->xres < xres_min) 509 var->xres = xres_min; 510 if (var->yres < yres_min) 511 var->yres = yres_min; 512 if (var->xres > xres_max) 513 var->xres = xres_max; 514 if (var->yres > yres_max) 515 var->yres = yres_max; 516 517 if (var->xres_virtual < var->xres) 518 var->xres_virtual = var->xres; 519 if (var->yres_virtual < var->yres) 520 var->yres_virtual = var->yres; 521 max_frame_size = fbdev->mem_desc.region[plane->idx].size; 522 line_size = var->xres_virtual * bpp / 8; 523 if (line_size * var->yres_virtual > max_frame_size) { 524 /* Try to keep yres_virtual first */ 525 line_size = max_frame_size / var->yres_virtual; 526 var->xres_virtual = line_size * 8 / bpp; 527 if (var->xres_virtual < var->xres) { 528 /* Still doesn't fit. Shrink yres_virtual too */ 529 var->xres_virtual = var->xres; 530 line_size = var->xres * bpp / 8; 531 var->yres_virtual = max_frame_size / line_size; 532 } 533 /* Recheck this, as the virtual size changed. */ 534 if (var->xres_virtual < var->xres) 535 var->xres = var->xres_virtual; 536 if (var->yres_virtual < var->yres) 537 var->yres = var->yres_virtual; 538 if (var->xres < xres_min || var->yres < yres_min) 539 return -EINVAL; 540 } 541 if (var->xres + var->xoffset > var->xres_virtual) 542 var->xoffset = var->xres_virtual - var->xres; 543 if (var->yres + var->yoffset > var->yres_virtual) 544 var->yoffset = var->yres_virtual - var->yres; 545 546 if (plane->color_mode == OMAPFB_COLOR_RGB444) { 547 var->red.offset = 8; 548 var->red.length = 4; 549 var->red.msb_right = 0; 550 var->green.offset = 4; 551 var->green.length = 4; 552 var->green.msb_right = 0; 553 var->blue.offset = 0; 554 var->blue.length = 4; 555 var->blue.msb_right = 0; 556 } else { 557 var->red.offset = 11; 558 var->red.length = 5; 559 var->red.msb_right = 0; 560 var->green.offset = 5; 561 var->green.length = 6; 562 var->green.msb_right = 0; 563 var->blue.offset = 0; 564 var->blue.length = 5; 565 var->blue.msb_right = 0; 566 } 567 568 var->height = -1; 569 var->width = -1; 570 var->grayscale = 0; 571 572 /* pixclock in ps, the rest in pixclock */ 573 var->pixclock = 10000000 / (panel->pixel_clock / 100); 574 var->left_margin = panel->hfp; 575 var->right_margin = panel->hbp; 576 var->upper_margin = panel->vfp; 577 var->lower_margin = panel->vbp; 578 var->hsync_len = panel->hsw; 579 var->vsync_len = panel->vsw; 580 581 /* TODO: get these from panel->config */ 582 var->vmode = FB_VMODE_NONINTERLACED; 583 var->sync = 0; 584 585 return 0; 586 } 587 588 589 /* 590 * Set new x,y offsets in the virtual display for the visible area and switch 591 * to the new mode. 592 */ 593 static int omapfb_pan_display(struct fb_var_screeninfo *var, 594 struct fb_info *fbi) 595 { 596 struct omapfb_plane_struct *plane = fbi->par; 597 struct omapfb_device *fbdev = plane->fbdev; 598 int r = 0; 599 600 omapfb_rqueue_lock(fbdev); 601 if (var->xoffset != fbi->var.xoffset || 602 var->yoffset != fbi->var.yoffset) { 603 struct fb_var_screeninfo *new_var = &fbdev->new_var; 604 605 memcpy(new_var, &fbi->var, sizeof(*new_var)); 606 new_var->xoffset = var->xoffset; 607 new_var->yoffset = var->yoffset; 608 if (set_fb_var(fbi, new_var)) 609 r = -EINVAL; 610 else { 611 memcpy(&fbi->var, new_var, sizeof(*new_var)); 612 ctrl_change_mode(fbi); 613 } 614 } 615 omapfb_rqueue_unlock(fbdev); 616 617 return r; 618 } 619 620 /* Set mirror to vertical axis and switch to the new mode. */ 621 static int omapfb_mirror(struct fb_info *fbi, int mirror) 622 { 623 struct omapfb_plane_struct *plane = fbi->par; 624 struct omapfb_device *fbdev = plane->fbdev; 625 int r = 0; 626 627 omapfb_rqueue_lock(fbdev); 628 mirror = mirror ? 1 : 0; 629 if (cpu_is_omap15xx()) 630 r = -EINVAL; 631 else if (mirror != plane->info.mirror) { 632 plane->info.mirror = mirror; 633 r = ctrl_change_mode(fbi); 634 } 635 omapfb_rqueue_unlock(fbdev); 636 637 return r; 638 } 639 640 /* 641 * Check values in var, try to adjust them in case of out of bound values if 642 * possible, or return error. 643 */ 644 static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi) 645 { 646 struct omapfb_plane_struct *plane = fbi->par; 647 struct omapfb_device *fbdev = plane->fbdev; 648 int r; 649 650 omapfb_rqueue_lock(fbdev); 651 if (fbdev->ctrl->sync != NULL) 652 fbdev->ctrl->sync(); 653 r = set_fb_var(fbi, var); 654 omapfb_rqueue_unlock(fbdev); 655 656 return r; 657 } 658 659 /* 660 * Switch to a new mode. The parameters for it has been check already by 661 * omapfb_check_var. 662 */ 663 static int omapfb_set_par(struct fb_info *fbi) 664 { 665 struct omapfb_plane_struct *plane = fbi->par; 666 struct omapfb_device *fbdev = plane->fbdev; 667 int r = 0; 668 669 omapfb_rqueue_lock(fbdev); 670 set_fb_fix(fbi, 0); 671 r = ctrl_change_mode(fbi); 672 omapfb_rqueue_unlock(fbdev); 673 674 return r; 675 } 676 677 static int omapfb_update_window_async(struct fb_info *fbi, 678 struct omapfb_update_window *win, 679 void (*callback)(void *), 680 void *callback_data) 681 { 682 int xres, yres; 683 struct omapfb_plane_struct *plane = fbi->par; 684 struct omapfb_device *fbdev = plane->fbdev; 685 struct fb_var_screeninfo *var = &fbi->var; 686 687 switch (var->rotate) { 688 case 0: 689 case 180: 690 xres = fbdev->panel->x_res; 691 yres = fbdev->panel->y_res; 692 break; 693 case 90: 694 case 270: 695 xres = fbdev->panel->y_res; 696 yres = fbdev->panel->x_res; 697 break; 698 default: 699 return -EINVAL; 700 } 701 702 if (win->x >= xres || win->y >= yres || 703 win->out_x > xres || win->out_y > yres) 704 return -EINVAL; 705 706 if (!fbdev->ctrl->update_window || 707 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE) 708 return -ENODEV; 709 710 if (win->x + win->width > xres) 711 win->width = xres - win->x; 712 if (win->y + win->height > yres) 713 win->height = yres - win->y; 714 if (win->out_x + win->out_width > xres) 715 win->out_width = xres - win->out_x; 716 if (win->out_y + win->out_height > yres) 717 win->out_height = yres - win->out_y; 718 if (!win->width || !win->height || !win->out_width || !win->out_height) 719 return 0; 720 721 return fbdev->ctrl->update_window(fbi, win, callback, callback_data); 722 } 723 724 static int omapfb_update_win(struct fb_info *fbi, 725 struct omapfb_update_window *win) 726 { 727 struct omapfb_plane_struct *plane = fbi->par; 728 int ret; 729 730 omapfb_rqueue_lock(plane->fbdev); 731 ret = omapfb_update_window_async(fbi, win, NULL, NULL); 732 omapfb_rqueue_unlock(plane->fbdev); 733 734 return ret; 735 } 736 737 static int omapfb_update_full_screen(struct fb_info *fbi) 738 { 739 struct omapfb_plane_struct *plane = fbi->par; 740 struct omapfb_device *fbdev = plane->fbdev; 741 struct omapfb_update_window win; 742 int r; 743 744 if (!fbdev->ctrl->update_window || 745 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE) 746 return -ENODEV; 747 748 win.x = 0; 749 win.y = 0; 750 win.width = fbi->var.xres; 751 win.height = fbi->var.yres; 752 win.out_x = 0; 753 win.out_y = 0; 754 win.out_width = fbi->var.xres; 755 win.out_height = fbi->var.yres; 756 win.format = 0; 757 758 omapfb_rqueue_lock(fbdev); 759 r = fbdev->ctrl->update_window(fbi, &win, NULL, NULL); 760 omapfb_rqueue_unlock(fbdev); 761 762 return r; 763 } 764 765 static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi) 766 { 767 struct omapfb_plane_struct *plane = fbi->par; 768 struct omapfb_device *fbdev = plane->fbdev; 769 struct lcd_panel *panel = fbdev->panel; 770 struct omapfb_plane_info old_info; 771 int r = 0; 772 773 if (pi->pos_x + pi->out_width > panel->x_res || 774 pi->pos_y + pi->out_height > panel->y_res) 775 return -EINVAL; 776 777 omapfb_rqueue_lock(fbdev); 778 if (pi->enabled && !fbdev->mem_desc.region[plane->idx].size) { 779 /* 780 * This plane's memory was freed, can't enable it 781 * until it's reallocated. 782 */ 783 r = -EINVAL; 784 goto out; 785 } 786 old_info = plane->info; 787 plane->info = *pi; 788 if (pi->enabled) { 789 r = ctrl_change_mode(fbi); 790 if (r < 0) { 791 plane->info = old_info; 792 goto out; 793 } 794 } 795 r = fbdev->ctrl->enable_plane(plane->idx, pi->enabled); 796 if (r < 0) { 797 plane->info = old_info; 798 goto out; 799 } 800 out: 801 omapfb_rqueue_unlock(fbdev); 802 return r; 803 } 804 805 static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi) 806 { 807 struct omapfb_plane_struct *plane = fbi->par; 808 809 *pi = plane->info; 810 return 0; 811 } 812 813 static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi) 814 { 815 struct omapfb_plane_struct *plane = fbi->par; 816 struct omapfb_device *fbdev = plane->fbdev; 817 struct omapfb_mem_region *rg = &fbdev->mem_desc.region[plane->idx]; 818 size_t size; 819 int r = 0; 820 821 if (fbdev->ctrl->setup_mem == NULL) 822 return -ENODEV; 823 if (mi->type != OMAPFB_MEMTYPE_SDRAM) 824 return -EINVAL; 825 826 size = PAGE_ALIGN(mi->size); 827 omapfb_rqueue_lock(fbdev); 828 if (plane->info.enabled) { 829 r = -EBUSY; 830 goto out; 831 } 832 if (rg->size != size || rg->type != mi->type) { 833 struct fb_var_screeninfo *new_var = &fbdev->new_var; 834 unsigned long old_size = rg->size; 835 u8 old_type = rg->type; 836 unsigned long paddr; 837 838 rg->size = size; 839 rg->type = mi->type; 840 /* 841 * size == 0 is a special case, for which we 842 * don't check / adjust the screen parameters. 843 * This isn't a problem since the plane can't 844 * be reenabled unless its size is > 0. 845 */ 846 if (old_size != size && size) { 847 if (size) { 848 memcpy(new_var, &fbi->var, sizeof(*new_var)); 849 r = set_fb_var(fbi, new_var); 850 if (r < 0) 851 goto out; 852 } 853 } 854 855 if (fbdev->ctrl->sync) 856 fbdev->ctrl->sync(); 857 r = fbdev->ctrl->setup_mem(plane->idx, size, mi->type, &paddr); 858 if (r < 0) { 859 /* Revert changes. */ 860 rg->size = old_size; 861 rg->type = old_type; 862 goto out; 863 } 864 rg->paddr = paddr; 865 866 if (old_size != size) { 867 if (size) { 868 memcpy(&fbi->var, new_var, sizeof(fbi->var)); 869 set_fb_fix(fbi, 0); 870 } else { 871 /* 872 * Set these explicitly to indicate that the 873 * plane memory is dealloce'd, the other 874 * screen parameters in var / fix are invalid. 875 */ 876 mutex_lock(&fbi->mm_lock); 877 fbi->fix.smem_start = 0; 878 fbi->fix.smem_len = 0; 879 mutex_unlock(&fbi->mm_lock); 880 } 881 } 882 } 883 out: 884 omapfb_rqueue_unlock(fbdev); 885 886 return r; 887 } 888 889 static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi) 890 { 891 struct omapfb_plane_struct *plane = fbi->par; 892 struct omapfb_device *fbdev = plane->fbdev; 893 struct omapfb_mem_region *rg; 894 895 rg = &fbdev->mem_desc.region[plane->idx]; 896 memset(mi, 0, sizeof(*mi)); 897 mi->size = rg->size; 898 mi->type = rg->type; 899 900 return 0; 901 } 902 903 static int omapfb_set_color_key(struct omapfb_device *fbdev, 904 struct omapfb_color_key *ck) 905 { 906 int r; 907 908 if (!fbdev->ctrl->set_color_key) 909 return -ENODEV; 910 911 omapfb_rqueue_lock(fbdev); 912 r = fbdev->ctrl->set_color_key(ck); 913 omapfb_rqueue_unlock(fbdev); 914 915 return r; 916 } 917 918 static int omapfb_get_color_key(struct omapfb_device *fbdev, 919 struct omapfb_color_key *ck) 920 { 921 int r; 922 923 if (!fbdev->ctrl->get_color_key) 924 return -ENODEV; 925 926 omapfb_rqueue_lock(fbdev); 927 r = fbdev->ctrl->get_color_key(ck); 928 omapfb_rqueue_unlock(fbdev); 929 930 return r; 931 } 932 933 static struct blocking_notifier_head omapfb_client_list[OMAPFB_PLANE_NUM]; 934 static int notifier_inited; 935 936 static void omapfb_init_notifier(void) 937 { 938 int i; 939 940 for (i = 0; i < OMAPFB_PLANE_NUM; i++) 941 BLOCKING_INIT_NOTIFIER_HEAD(&omapfb_client_list[i]); 942 } 943 944 int omapfb_register_client(struct omapfb_notifier_block *omapfb_nb, 945 omapfb_notifier_callback_t callback, 946 void *callback_data) 947 { 948 int r; 949 950 if ((unsigned)omapfb_nb->plane_idx >= OMAPFB_PLANE_NUM) 951 return -EINVAL; 952 953 if (!notifier_inited) { 954 omapfb_init_notifier(); 955 notifier_inited = 1; 956 } 957 958 omapfb_nb->nb.notifier_call = (int (*)(struct notifier_block *, 959 unsigned long, void *))callback; 960 omapfb_nb->data = callback_data; 961 r = blocking_notifier_chain_register( 962 &omapfb_client_list[omapfb_nb->plane_idx], 963 &omapfb_nb->nb); 964 if (r) 965 return r; 966 if (omapfb_dev != NULL && 967 omapfb_dev->ctrl && omapfb_dev->ctrl->bind_client) { 968 omapfb_dev->ctrl->bind_client(omapfb_nb); 969 } 970 971 return 0; 972 } 973 EXPORT_SYMBOL(omapfb_register_client); 974 975 int omapfb_unregister_client(struct omapfb_notifier_block *omapfb_nb) 976 { 977 return blocking_notifier_chain_unregister( 978 &omapfb_client_list[omapfb_nb->plane_idx], &omapfb_nb->nb); 979 } 980 EXPORT_SYMBOL(omapfb_unregister_client); 981 982 void omapfb_notify_clients(struct omapfb_device *fbdev, unsigned long event) 983 { 984 int i; 985 986 if (!notifier_inited) 987 /* no client registered yet */ 988 return; 989 990 for (i = 0; i < OMAPFB_PLANE_NUM; i++) 991 blocking_notifier_call_chain(&omapfb_client_list[i], event, 992 fbdev->fb_info[i]); 993 } 994 EXPORT_SYMBOL(omapfb_notify_clients); 995 996 static int omapfb_set_update_mode(struct omapfb_device *fbdev, 997 enum omapfb_update_mode mode) 998 { 999 int r; 1000 1001 omapfb_rqueue_lock(fbdev); 1002 r = fbdev->ctrl->set_update_mode(mode); 1003 omapfb_rqueue_unlock(fbdev); 1004 1005 return r; 1006 } 1007 1008 static enum omapfb_update_mode omapfb_get_update_mode(struct omapfb_device *fbdev) 1009 { 1010 int r; 1011 1012 omapfb_rqueue_lock(fbdev); 1013 r = fbdev->ctrl->get_update_mode(); 1014 omapfb_rqueue_unlock(fbdev); 1015 1016 return r; 1017 } 1018 1019 static void omapfb_get_caps(struct omapfb_device *fbdev, int plane, 1020 struct omapfb_caps *caps) 1021 { 1022 memset(caps, 0, sizeof(*caps)); 1023 fbdev->ctrl->get_caps(plane, caps); 1024 if (fbdev->panel->get_caps) 1025 caps->ctrl |= fbdev->panel->get_caps(fbdev->panel); 1026 } 1027 1028 /* For lcd testing */ 1029 void omapfb_write_first_pixel(struct omapfb_device *fbdev, u16 pixval) 1030 { 1031 omapfb_rqueue_lock(fbdev); 1032 *(u16 *)fbdev->mem_desc.region[0].vaddr = pixval; 1033 if (fbdev->ctrl->get_update_mode() == OMAPFB_MANUAL_UPDATE) { 1034 struct omapfb_update_window win; 1035 1036 memset(&win, 0, sizeof(win)); 1037 win.width = 2; 1038 win.height = 2; 1039 win.out_width = 2; 1040 win.out_height = 2; 1041 fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, NULL); 1042 } 1043 omapfb_rqueue_unlock(fbdev); 1044 } 1045 EXPORT_SYMBOL(omapfb_write_first_pixel); 1046 1047 /* 1048 * Ioctl interface. Part of the kernel mode frame buffer API is duplicated 1049 * here to be accessible by user mode code. 1050 */ 1051 static int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd, 1052 unsigned long arg) 1053 { 1054 struct omapfb_plane_struct *plane = fbi->par; 1055 struct omapfb_device *fbdev = plane->fbdev; 1056 const struct fb_ops *ops = fbi->fbops; 1057 union { 1058 struct omapfb_update_window update_window; 1059 struct omapfb_plane_info plane_info; 1060 struct omapfb_mem_info mem_info; 1061 struct omapfb_color_key color_key; 1062 enum omapfb_update_mode update_mode; 1063 struct omapfb_caps caps; 1064 unsigned int mirror; 1065 int plane_out; 1066 int enable_plane; 1067 } p; 1068 int r = 0; 1069 1070 BUG_ON(!ops); 1071 switch (cmd) { 1072 case OMAPFB_MIRROR: 1073 if (get_user(p.mirror, (int __user *)arg)) 1074 r = -EFAULT; 1075 else 1076 omapfb_mirror(fbi, p.mirror); 1077 break; 1078 case OMAPFB_SYNC_GFX: 1079 omapfb_sync(fbi); 1080 break; 1081 case OMAPFB_VSYNC: 1082 break; 1083 case OMAPFB_SET_UPDATE_MODE: 1084 if (get_user(p.update_mode, (int __user *)arg)) 1085 r = -EFAULT; 1086 else 1087 r = omapfb_set_update_mode(fbdev, p.update_mode); 1088 break; 1089 case OMAPFB_GET_UPDATE_MODE: 1090 p.update_mode = omapfb_get_update_mode(fbdev); 1091 if (put_user(p.update_mode, 1092 (enum omapfb_update_mode __user *)arg)) 1093 r = -EFAULT; 1094 break; 1095 case OMAPFB_UPDATE_WINDOW_OLD: 1096 if (copy_from_user(&p.update_window, (void __user *)arg, 1097 sizeof(struct omapfb_update_window_old))) 1098 r = -EFAULT; 1099 else { 1100 struct omapfb_update_window *u = &p.update_window; 1101 u->out_x = u->x; 1102 u->out_y = u->y; 1103 u->out_width = u->width; 1104 u->out_height = u->height; 1105 memset(u->reserved, 0, sizeof(u->reserved)); 1106 r = omapfb_update_win(fbi, u); 1107 } 1108 break; 1109 case OMAPFB_UPDATE_WINDOW: 1110 if (copy_from_user(&p.update_window, (void __user *)arg, 1111 sizeof(p.update_window))) 1112 r = -EFAULT; 1113 else 1114 r = omapfb_update_win(fbi, &p.update_window); 1115 break; 1116 case OMAPFB_SETUP_PLANE: 1117 if (copy_from_user(&p.plane_info, (void __user *)arg, 1118 sizeof(p.plane_info))) 1119 r = -EFAULT; 1120 else 1121 r = omapfb_setup_plane(fbi, &p.plane_info); 1122 break; 1123 case OMAPFB_QUERY_PLANE: 1124 if ((r = omapfb_query_plane(fbi, &p.plane_info)) < 0) 1125 break; 1126 if (copy_to_user((void __user *)arg, &p.plane_info, 1127 sizeof(p.plane_info))) 1128 r = -EFAULT; 1129 break; 1130 case OMAPFB_SETUP_MEM: 1131 if (copy_from_user(&p.mem_info, (void __user *)arg, 1132 sizeof(p.mem_info))) 1133 r = -EFAULT; 1134 else 1135 r = omapfb_setup_mem(fbi, &p.mem_info); 1136 break; 1137 case OMAPFB_QUERY_MEM: 1138 if ((r = omapfb_query_mem(fbi, &p.mem_info)) < 0) 1139 break; 1140 if (copy_to_user((void __user *)arg, &p.mem_info, 1141 sizeof(p.mem_info))) 1142 r = -EFAULT; 1143 break; 1144 case OMAPFB_SET_COLOR_KEY: 1145 if (copy_from_user(&p.color_key, (void __user *)arg, 1146 sizeof(p.color_key))) 1147 r = -EFAULT; 1148 else 1149 r = omapfb_set_color_key(fbdev, &p.color_key); 1150 break; 1151 case OMAPFB_GET_COLOR_KEY: 1152 if ((r = omapfb_get_color_key(fbdev, &p.color_key)) < 0) 1153 break; 1154 if (copy_to_user((void __user *)arg, &p.color_key, 1155 sizeof(p.color_key))) 1156 r = -EFAULT; 1157 break; 1158 case OMAPFB_GET_CAPS: 1159 omapfb_get_caps(fbdev, plane->idx, &p.caps); 1160 if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps))) 1161 r = -EFAULT; 1162 break; 1163 case OMAPFB_LCD_TEST: 1164 { 1165 int test_num; 1166 1167 if (get_user(test_num, (int __user *)arg)) { 1168 r = -EFAULT; 1169 break; 1170 } 1171 if (!fbdev->panel->run_test) { 1172 r = -EINVAL; 1173 break; 1174 } 1175 r = fbdev->panel->run_test(fbdev->panel, test_num); 1176 break; 1177 } 1178 case OMAPFB_CTRL_TEST: 1179 { 1180 int test_num; 1181 1182 if (get_user(test_num, (int __user *)arg)) { 1183 r = -EFAULT; 1184 break; 1185 } 1186 if (!fbdev->ctrl->run_test) { 1187 r = -EINVAL; 1188 break; 1189 } 1190 r = fbdev->ctrl->run_test(test_num); 1191 break; 1192 } 1193 default: 1194 r = -EINVAL; 1195 } 1196 1197 return r; 1198 } 1199 1200 static int omapfb_mmap(struct fb_info *info, struct vm_area_struct *vma) 1201 { 1202 struct omapfb_plane_struct *plane = info->par; 1203 struct omapfb_device *fbdev = plane->fbdev; 1204 int r; 1205 1206 omapfb_rqueue_lock(fbdev); 1207 r = fbdev->ctrl->mmap(info, vma); 1208 omapfb_rqueue_unlock(fbdev); 1209 1210 return r; 1211 } 1212 1213 /* 1214 * Callback table for the frame buffer framework. Some of these pointers 1215 * will be changed according to the current setting of fb_info->accel_flags. 1216 */ 1217 static struct fb_ops omapfb_ops = { 1218 .owner = THIS_MODULE, 1219 FB_DEFAULT_IOMEM_OPS, 1220 .fb_open = omapfb_open, 1221 .fb_release = omapfb_release, 1222 .fb_setcolreg = omapfb_setcolreg, 1223 .fb_setcmap = omapfb_setcmap, 1224 .fb_blank = omapfb_blank, 1225 .fb_ioctl = omapfb_ioctl, 1226 .fb_check_var = omapfb_check_var, 1227 .fb_set_par = omapfb_set_par, 1228 .fb_pan_display = omapfb_pan_display, 1229 }; 1230 1231 /* 1232 * --------------------------------------------------------------------------- 1233 * Sysfs interface 1234 * --------------------------------------------------------------------------- 1235 */ 1236 /* omapfbX sysfs entries */ 1237 static ssize_t omapfb_show_caps_num(struct device *dev, 1238 struct device_attribute *attr, char *buf) 1239 { 1240 struct omapfb_device *fbdev = dev_get_drvdata(dev); 1241 int plane; 1242 size_t size; 1243 struct omapfb_caps caps; 1244 1245 plane = 0; 1246 size = 0; 1247 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) { 1248 omapfb_get_caps(fbdev, plane, &caps); 1249 size += scnprintf(&buf[size], PAGE_SIZE - size, 1250 "plane#%d %#010x %#010x %#010x\n", 1251 plane, caps.ctrl, caps.plane_color, caps.wnd_color); 1252 plane++; 1253 } 1254 return size; 1255 } 1256 1257 static ssize_t omapfb_show_caps_text(struct device *dev, 1258 struct device_attribute *attr, char *buf) 1259 { 1260 struct omapfb_device *fbdev = dev_get_drvdata(dev); 1261 int i; 1262 struct omapfb_caps caps; 1263 int plane; 1264 size_t size; 1265 1266 plane = 0; 1267 size = 0; 1268 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) { 1269 omapfb_get_caps(fbdev, plane, &caps); 1270 size += scnprintf(&buf[size], PAGE_SIZE - size, 1271 "plane#%d:\n", plane); 1272 for (i = 0; i < ARRAY_SIZE(ctrl_caps) && 1273 size < PAGE_SIZE; i++) { 1274 if (ctrl_caps[i].flag & caps.ctrl) 1275 size += scnprintf(&buf[size], PAGE_SIZE - size, 1276 " %s\n", ctrl_caps[i].name); 1277 } 1278 size += scnprintf(&buf[size], PAGE_SIZE - size, 1279 " plane colors:\n"); 1280 for (i = 0; i < ARRAY_SIZE(color_caps) && 1281 size < PAGE_SIZE; i++) { 1282 if (color_caps[i].flag & caps.plane_color) 1283 size += scnprintf(&buf[size], PAGE_SIZE - size, 1284 " %s\n", color_caps[i].name); 1285 } 1286 size += scnprintf(&buf[size], PAGE_SIZE - size, 1287 " window colors:\n"); 1288 for (i = 0; i < ARRAY_SIZE(color_caps) && 1289 size < PAGE_SIZE; i++) { 1290 if (color_caps[i].flag & caps.wnd_color) 1291 size += scnprintf(&buf[size], PAGE_SIZE - size, 1292 " %s\n", color_caps[i].name); 1293 } 1294 1295 plane++; 1296 } 1297 return size; 1298 } 1299 1300 static DEVICE_ATTR(caps_num, 0444, omapfb_show_caps_num, NULL); 1301 static DEVICE_ATTR(caps_text, 0444, omapfb_show_caps_text, NULL); 1302 1303 /* panel sysfs entries */ 1304 static ssize_t omapfb_show_panel_name(struct device *dev, 1305 struct device_attribute *attr, char *buf) 1306 { 1307 struct omapfb_device *fbdev = dev_get_drvdata(dev); 1308 1309 return sysfs_emit(buf, "%s\n", fbdev->panel->name); 1310 } 1311 1312 static ssize_t omapfb_show_bklight_level(struct device *dev, 1313 struct device_attribute *attr, 1314 char *buf) 1315 { 1316 struct omapfb_device *fbdev = dev_get_drvdata(dev); 1317 int r; 1318 1319 if (fbdev->panel->get_bklight_level) { 1320 r = sysfs_emit(buf, "%d\n", 1321 fbdev->panel->get_bklight_level(fbdev->panel)); 1322 } else 1323 r = -ENODEV; 1324 return r; 1325 } 1326 1327 static ssize_t omapfb_store_bklight_level(struct device *dev, 1328 struct device_attribute *attr, 1329 const char *buf, size_t size) 1330 { 1331 struct omapfb_device *fbdev = dev_get_drvdata(dev); 1332 int r; 1333 1334 if (fbdev->panel->set_bklight_level) { 1335 unsigned int level; 1336 1337 if (sscanf(buf, "%10d", &level) == 1) { 1338 r = fbdev->panel->set_bklight_level(fbdev->panel, 1339 level); 1340 } else 1341 r = -EINVAL; 1342 } else 1343 r = -ENODEV; 1344 return r ? r : size; 1345 } 1346 1347 static ssize_t omapfb_show_bklight_max(struct device *dev, 1348 struct device_attribute *attr, char *buf) 1349 { 1350 struct omapfb_device *fbdev = dev_get_drvdata(dev); 1351 int r; 1352 1353 if (fbdev->panel->get_bklight_level) { 1354 r = sysfs_emit(buf, "%d\n", 1355 fbdev->panel->get_bklight_max(fbdev->panel)); 1356 } else 1357 r = -ENODEV; 1358 return r; 1359 } 1360 1361 static struct device_attribute dev_attr_panel_name = 1362 __ATTR(name, 0444, omapfb_show_panel_name, NULL); 1363 static DEVICE_ATTR(backlight_level, 0664, 1364 omapfb_show_bklight_level, omapfb_store_bklight_level); 1365 static DEVICE_ATTR(backlight_max, 0444, omapfb_show_bklight_max, NULL); 1366 1367 static struct attribute *panel_attrs[] = { 1368 &dev_attr_panel_name.attr, 1369 &dev_attr_backlight_level.attr, 1370 &dev_attr_backlight_max.attr, 1371 NULL, 1372 }; 1373 1374 static const struct attribute_group panel_attr_grp = { 1375 .name = "panel", 1376 .attrs = panel_attrs, 1377 }; 1378 1379 /* ctrl sysfs entries */ 1380 static ssize_t omapfb_show_ctrl_name(struct device *dev, 1381 struct device_attribute *attr, char *buf) 1382 { 1383 struct omapfb_device *fbdev = dev_get_drvdata(dev); 1384 1385 return sysfs_emit(buf, "%s\n", fbdev->ctrl->name); 1386 } 1387 1388 static struct device_attribute dev_attr_ctrl_name = 1389 __ATTR(name, 0444, omapfb_show_ctrl_name, NULL); 1390 1391 static struct attribute *ctrl_attrs[] = { 1392 &dev_attr_ctrl_name.attr, 1393 NULL, 1394 }; 1395 1396 static const struct attribute_group ctrl_attr_grp = { 1397 .name = "ctrl", 1398 .attrs = ctrl_attrs, 1399 }; 1400 1401 static int omapfb_register_sysfs(struct omapfb_device *fbdev) 1402 { 1403 int r; 1404 1405 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_num))) 1406 goto fail0; 1407 1408 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_text))) 1409 goto fail1; 1410 1411 if ((r = sysfs_create_group(&fbdev->dev->kobj, &panel_attr_grp))) 1412 goto fail2; 1413 1414 if ((r = sysfs_create_group(&fbdev->dev->kobj, &ctrl_attr_grp))) 1415 goto fail3; 1416 1417 return 0; 1418 fail3: 1419 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp); 1420 fail2: 1421 device_remove_file(fbdev->dev, &dev_attr_caps_text); 1422 fail1: 1423 device_remove_file(fbdev->dev, &dev_attr_caps_num); 1424 fail0: 1425 dev_err(fbdev->dev, "unable to register sysfs interface\n"); 1426 return r; 1427 } 1428 1429 static void omapfb_unregister_sysfs(struct omapfb_device *fbdev) 1430 { 1431 sysfs_remove_group(&fbdev->dev->kobj, &ctrl_attr_grp); 1432 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp); 1433 device_remove_file(fbdev->dev, &dev_attr_caps_num); 1434 device_remove_file(fbdev->dev, &dev_attr_caps_text); 1435 } 1436 1437 /* 1438 * --------------------------------------------------------------------------- 1439 * LDM callbacks 1440 * --------------------------------------------------------------------------- 1441 */ 1442 /* Initialize system fb_info object and set the default video mode. 1443 * The frame buffer memory already allocated by lcddma_init 1444 */ 1445 static int fbinfo_init(struct omapfb_device *fbdev, struct fb_info *info) 1446 { 1447 struct fb_var_screeninfo *var = &info->var; 1448 struct fb_fix_screeninfo *fix = &info->fix; 1449 int r = 0; 1450 1451 info->fbops = &omapfb_ops; 1452 1453 strscpy(fix->id, MODULE_NAME, sizeof(fix->id)); 1454 1455 info->pseudo_palette = fbdev->pseudo_palette; 1456 1457 var->accel_flags = def_accel ? FB_ACCELF_TEXT : 0; 1458 var->xres = def_vxres; 1459 var->yres = def_vyres; 1460 var->xres_virtual = def_vxres; 1461 var->yres_virtual = def_vyres; 1462 var->rotate = def_rotate; 1463 var->bits_per_pixel = fbdev->panel->bpp; 1464 1465 set_fb_var(info, var); 1466 set_fb_fix(info, 1); 1467 1468 r = fb_alloc_cmap(&info->cmap, 16, 0); 1469 if (r != 0) 1470 dev_err(fbdev->dev, "unable to allocate color map memory\n"); 1471 1472 return r; 1473 } 1474 1475 /* Release the fb_info object */ 1476 static void fbinfo_cleanup(struct omapfb_device *fbdev, struct fb_info *fbi) 1477 { 1478 fb_dealloc_cmap(&fbi->cmap); 1479 } 1480 1481 static void planes_cleanup(struct omapfb_device *fbdev) 1482 { 1483 int i; 1484 1485 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) { 1486 if (fbdev->fb_info[i] == NULL) 1487 break; 1488 fbinfo_cleanup(fbdev, fbdev->fb_info[i]); 1489 framebuffer_release(fbdev->fb_info[i]); 1490 } 1491 } 1492 1493 static int planes_init(struct omapfb_device *fbdev) 1494 { 1495 struct fb_info *fbi; 1496 int i; 1497 int r; 1498 1499 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) { 1500 struct omapfb_plane_struct *plane; 1501 fbi = framebuffer_alloc(sizeof(struct omapfb_plane_struct), 1502 fbdev->dev); 1503 if (fbi == NULL) { 1504 planes_cleanup(fbdev); 1505 return -ENOMEM; 1506 } 1507 plane = fbi->par; 1508 plane->idx = i; 1509 plane->fbdev = fbdev; 1510 plane->info.mirror = def_mirror; 1511 fbdev->fb_info[i] = fbi; 1512 1513 if ((r = fbinfo_init(fbdev, fbi)) < 0) { 1514 framebuffer_release(fbi); 1515 planes_cleanup(fbdev); 1516 return r; 1517 } 1518 plane->info.out_width = fbi->var.xres; 1519 plane->info.out_height = fbi->var.yres; 1520 } 1521 return 0; 1522 } 1523 1524 /* 1525 * Free driver resources. Can be called to rollback an aborted initialization 1526 * sequence. 1527 */ 1528 static void omapfb_free_resources(struct omapfb_device *fbdev, int state) 1529 { 1530 int i; 1531 1532 switch (state) { 1533 case OMAPFB_ACTIVE: 1534 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) 1535 unregister_framebuffer(fbdev->fb_info[i]); 1536 fallthrough; 1537 case 7: 1538 omapfb_unregister_sysfs(fbdev); 1539 fallthrough; 1540 case 6: 1541 if (fbdev->panel->disable) 1542 fbdev->panel->disable(fbdev->panel); 1543 fallthrough; 1544 case 5: 1545 omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED); 1546 fallthrough; 1547 case 4: 1548 planes_cleanup(fbdev); 1549 fallthrough; 1550 case 3: 1551 ctrl_cleanup(fbdev); 1552 fallthrough; 1553 case 2: 1554 if (fbdev->panel->cleanup) 1555 fbdev->panel->cleanup(fbdev->panel); 1556 fallthrough; 1557 case 1: 1558 dev_set_drvdata(fbdev->dev, NULL); 1559 kfree(fbdev); 1560 break; 1561 case 0: 1562 /* nothing to free */ 1563 break; 1564 default: 1565 BUG(); 1566 } 1567 } 1568 1569 static int omapfb_find_ctrl(struct omapfb_device *fbdev) 1570 { 1571 struct omapfb_platform_data *conf; 1572 char name[17]; 1573 int i; 1574 1575 conf = dev_get_platdata(fbdev->dev); 1576 1577 fbdev->ctrl = NULL; 1578 1579 strscpy(name, conf->lcd.ctrl_name, sizeof(name)); 1580 1581 if (strcmp(name, "internal") == 0) { 1582 fbdev->ctrl = fbdev->int_ctrl; 1583 return 0; 1584 } 1585 1586 for (i = 0; i < ARRAY_SIZE(ctrls); i++) { 1587 dev_dbg(fbdev->dev, "ctrl %s\n", ctrls[i]->name); 1588 if (strcmp(ctrls[i]->name, name) == 0) { 1589 fbdev->ctrl = ctrls[i]; 1590 break; 1591 } 1592 } 1593 1594 if (fbdev->ctrl == NULL) { 1595 dev_dbg(fbdev->dev, "ctrl %s not supported\n", name); 1596 return -1; 1597 } 1598 1599 return 0; 1600 } 1601 1602 /* 1603 * Called by LDM binding to probe and attach a new device. 1604 * Initialization sequence: 1605 * 1. allocate system omapfb_device structure 1606 * 2. select controller type according to platform configuration 1607 * init LCD panel 1608 * 3. init LCD controller and LCD DMA 1609 * 4. init system fb_info structure for all planes 1610 * 5. setup video mode for first plane and enable it 1611 * 6. enable LCD panel 1612 * 7. register sysfs attributes 1613 * OMAPFB_ACTIVE: register system fb_info structure for all planes 1614 */ 1615 static int omapfb_do_probe(struct platform_device *pdev, 1616 struct lcd_panel *panel) 1617 { 1618 struct omapfb_device *fbdev = NULL; 1619 int init_state; 1620 unsigned long phz, hhz, vhz; 1621 unsigned long vram; 1622 int i; 1623 int r = 0; 1624 1625 init_state = 0; 1626 1627 if (pdev->num_resources != 2) { 1628 dev_err(&pdev->dev, "probed for an unknown device\n"); 1629 r = -ENODEV; 1630 goto cleanup; 1631 } 1632 1633 if (dev_get_platdata(&pdev->dev) == NULL) { 1634 dev_err(&pdev->dev, "missing platform data\n"); 1635 r = -ENOENT; 1636 goto cleanup; 1637 } 1638 1639 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); 1640 if (fbdev == NULL) { 1641 dev_err(&pdev->dev, 1642 "unable to allocate memory for device info\n"); 1643 r = -ENOMEM; 1644 goto cleanup; 1645 } 1646 fbdev->int_irq = platform_get_irq(pdev, 0); 1647 if (fbdev->int_irq < 0) { 1648 r = ENXIO; 1649 goto cleanup; 1650 } 1651 1652 fbdev->ext_irq = platform_get_irq(pdev, 1); 1653 if (fbdev->ext_irq < 0) { 1654 r = ENXIO; 1655 goto cleanup; 1656 } 1657 1658 init_state++; 1659 1660 fbdev->dev = &pdev->dev; 1661 fbdev->panel = panel; 1662 fbdev->dssdev = &omapdss_device; 1663 platform_set_drvdata(pdev, fbdev); 1664 1665 mutex_init(&fbdev->rqueue_mutex); 1666 1667 fbdev->int_ctrl = &omap1_int_ctrl; 1668 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL 1669 fbdev->ext_if = &omap1_ext_if; 1670 #endif 1671 if (omapfb_find_ctrl(fbdev) < 0) { 1672 dev_err(fbdev->dev, 1673 "LCD controller not found, board not supported\n"); 1674 r = -ENODEV; 1675 goto cleanup; 1676 } 1677 1678 if (fbdev->panel->init) { 1679 r = fbdev->panel->init(fbdev->panel, fbdev); 1680 if (r) 1681 goto cleanup; 1682 } 1683 1684 pr_info("omapfb: configured for panel %s\n", fbdev->panel->name); 1685 1686 def_vxres = def_vxres ? def_vxres : fbdev->panel->x_res; 1687 def_vyres = def_vyres ? def_vyres : fbdev->panel->y_res; 1688 1689 init_state++; 1690 1691 r = ctrl_init(fbdev); 1692 if (r) 1693 goto cleanup; 1694 if (fbdev->ctrl->mmap != NULL) 1695 omapfb_ops.fb_mmap = omapfb_mmap; 1696 init_state++; 1697 1698 r = planes_init(fbdev); 1699 if (r) 1700 goto cleanup; 1701 init_state++; 1702 1703 #ifdef CONFIG_FB_OMAP_DMA_TUNE 1704 /* Set DMA priority for EMIFF access to highest */ 1705 omap_set_dma_priority(0, OMAP_DMA_PORT_EMIFF, 15); 1706 #endif 1707 1708 r = ctrl_change_mode(fbdev->fb_info[0]); 1709 if (r) { 1710 dev_err(fbdev->dev, "mode setting failed\n"); 1711 goto cleanup; 1712 } 1713 1714 /* GFX plane is enabled by default */ 1715 r = fbdev->ctrl->enable_plane(OMAPFB_PLANE_GFX, 1); 1716 if (r) 1717 goto cleanup; 1718 1719 omapfb_set_update_mode(fbdev, manual_update ? 1720 OMAPFB_MANUAL_UPDATE : OMAPFB_AUTO_UPDATE); 1721 init_state++; 1722 1723 if (fbdev->panel->enable) { 1724 r = fbdev->panel->enable(fbdev->panel); 1725 if (r) 1726 goto cleanup; 1727 } 1728 init_state++; 1729 1730 r = omapfb_register_sysfs(fbdev); 1731 if (r) 1732 goto cleanup; 1733 init_state++; 1734 1735 vram = 0; 1736 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) { 1737 r = register_framebuffer(fbdev->fb_info[i]); 1738 if (r != 0) { 1739 dev_err(fbdev->dev, 1740 "registering framebuffer %d failed\n", i); 1741 goto cleanup; 1742 } 1743 vram += fbdev->mem_desc.region[i].size; 1744 } 1745 1746 fbdev->state = OMAPFB_ACTIVE; 1747 1748 panel = fbdev->panel; 1749 phz = panel->pixel_clock * 1000; 1750 hhz = phz * 10 / (panel->hfp + panel->x_res + panel->hbp + panel->hsw); 1751 vhz = hhz / (panel->vfp + panel->y_res + panel->vbp + panel->vsw); 1752 1753 omapfb_dev = fbdev; 1754 1755 pr_info("omapfb: Framebuffer initialized. Total vram %lu planes %d\n", 1756 vram, fbdev->mem_desc.region_cnt); 1757 pr_info("omapfb: Pixclock %lu kHz hfreq %lu.%lu kHz " 1758 "vfreq %lu.%lu Hz\n", 1759 phz / 1000, hhz / 10000, hhz % 10, vhz / 10, vhz % 10); 1760 1761 return 0; 1762 1763 cleanup: 1764 omapfb_free_resources(fbdev, init_state); 1765 1766 return r; 1767 } 1768 1769 static int omapfb_probe(struct platform_device *pdev) 1770 { 1771 int r; 1772 1773 BUG_ON(fbdev_pdev != NULL); 1774 1775 r = platform_device_register(&omapdss_device); 1776 if (r) { 1777 dev_err(&pdev->dev, "can't register omapdss device\n"); 1778 return r; 1779 } 1780 1781 /* Delay actual initialization until the LCD is registered */ 1782 fbdev_pdev = pdev; 1783 if (fbdev_panel != NULL) 1784 omapfb_do_probe(fbdev_pdev, fbdev_panel); 1785 return 0; 1786 } 1787 1788 void omapfb_register_panel(struct lcd_panel *panel) 1789 { 1790 BUG_ON(fbdev_panel != NULL); 1791 1792 fbdev_panel = panel; 1793 if (fbdev_pdev != NULL) 1794 omapfb_do_probe(fbdev_pdev, fbdev_panel); 1795 } 1796 EXPORT_SYMBOL_GPL(omapfb_register_panel); 1797 1798 /* Called when the device is being detached from the driver */ 1799 static void omapfb_remove(struct platform_device *pdev) 1800 { 1801 struct omapfb_device *fbdev = platform_get_drvdata(pdev); 1802 enum omapfb_state saved_state = fbdev->state; 1803 1804 /* FIXME: wait till completion of pending events */ 1805 1806 fbdev->state = OMAPFB_DISABLED; 1807 omapfb_free_resources(fbdev, saved_state); 1808 1809 platform_device_unregister(&omapdss_device); 1810 fbdev->dssdev = NULL; 1811 } 1812 1813 /* PM suspend */ 1814 static int omapfb_suspend(struct platform_device *pdev, pm_message_t mesg) 1815 { 1816 struct omapfb_device *fbdev = platform_get_drvdata(pdev); 1817 1818 if (fbdev != NULL) 1819 omapfb_blank(FB_BLANK_POWERDOWN, fbdev->fb_info[0]); 1820 return 0; 1821 } 1822 1823 /* PM resume */ 1824 static int omapfb_resume(struct platform_device *pdev) 1825 { 1826 struct omapfb_device *fbdev = platform_get_drvdata(pdev); 1827 1828 if (fbdev != NULL) 1829 omapfb_blank(FB_BLANK_UNBLANK, fbdev->fb_info[0]); 1830 return 0; 1831 } 1832 1833 static struct platform_driver omapfb_driver = { 1834 .probe = omapfb_probe, 1835 .remove_new = omapfb_remove, 1836 .suspend = omapfb_suspend, 1837 .resume = omapfb_resume, 1838 .driver = { 1839 .name = MODULE_NAME, 1840 }, 1841 }; 1842 1843 #ifndef MODULE 1844 1845 /* Process kernel command line parameters */ 1846 static int __init omapfb_setup(char *options) 1847 { 1848 char *this_opt = NULL; 1849 int r = 0; 1850 1851 pr_debug("omapfb: options %s\n", options); 1852 1853 if (!options || !*options) 1854 return 0; 1855 1856 while (!r && (this_opt = strsep(&options, ",")) != NULL) { 1857 if (!strncmp(this_opt, "accel", 5)) 1858 def_accel = 1; 1859 else if (!strncmp(this_opt, "vram:", 5)) { 1860 char *suffix; 1861 unsigned long vram; 1862 vram = (simple_strtoul(this_opt + 5, &suffix, 0)); 1863 switch (suffix[0]) { 1864 case '\0': 1865 break; 1866 case 'm': 1867 case 'M': 1868 vram *= 1024; 1869 fallthrough; 1870 case 'k': 1871 case 'K': 1872 vram *= 1024; 1873 break; 1874 default: 1875 pr_debug("omapfb: invalid vram suffix %c\n", 1876 suffix[0]); 1877 r = -1; 1878 } 1879 def_vram[def_vram_cnt++] = vram; 1880 } 1881 else if (!strncmp(this_opt, "vxres:", 6)) 1882 def_vxres = simple_strtoul(this_opt + 6, NULL, 0); 1883 else if (!strncmp(this_opt, "vyres:", 6)) 1884 def_vyres = simple_strtoul(this_opt + 6, NULL, 0); 1885 else if (!strncmp(this_opt, "rotate:", 7)) 1886 def_rotate = (simple_strtoul(this_opt + 7, NULL, 0)); 1887 else if (!strncmp(this_opt, "mirror:", 7)) 1888 def_mirror = (simple_strtoul(this_opt + 7, NULL, 0)); 1889 else if (!strncmp(this_opt, "manual_update", 13)) 1890 manual_update = 1; 1891 else { 1892 pr_debug("omapfb: invalid option\n"); 1893 r = -1; 1894 } 1895 } 1896 1897 return r; 1898 } 1899 1900 #endif 1901 1902 /* Register both the driver and the device */ 1903 static int __init omapfb_init(void) 1904 { 1905 #ifndef MODULE 1906 char *option; 1907 1908 if (fb_get_options("omapfb", &option)) 1909 return -ENODEV; 1910 omapfb_setup(option); 1911 #endif 1912 /* Register the driver with LDM */ 1913 if (platform_driver_register(&omapfb_driver)) { 1914 pr_debug("failed to register omapfb driver\n"); 1915 return -ENODEV; 1916 } 1917 1918 return 0; 1919 } 1920 1921 static void __exit omapfb_cleanup(void) 1922 { 1923 platform_driver_unregister(&omapfb_driver); 1924 } 1925 1926 module_param_named(accel, def_accel, uint, 0664); 1927 module_param_array_named(vram, def_vram, ulong, &def_vram_cnt, 0664); 1928 module_param_named(vxres, def_vxres, long, 0664); 1929 module_param_named(vyres, def_vyres, long, 0664); 1930 module_param_named(rotate, def_rotate, uint, 0664); 1931 module_param_named(mirror, def_mirror, uint, 0664); 1932 module_param_named(manual_update, manual_update, bool, 0664); 1933 1934 module_init(omapfb_init); 1935 module_exit(omapfb_cleanup); 1936 1937 MODULE_DESCRIPTION("TI OMAP framebuffer driver"); 1938 MODULE_AUTHOR("Imre Deak <imre.deak@nokia.com>"); 1939 MODULE_LICENSE("GPL"); 1940