drivers/gpu/drm/ast/ast_main.c

   1 /*
   2  * Copyright 2012 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sub license, and/or sell copies of the Software, and to
   9  * permit persons to whom the Software is furnished to do so, subject to
  10  * the following conditions:
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  13  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  14  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  15  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  16  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  17  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  18  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  19  *
  20  * The above copyright notice and this permission notice (including the
  21  * next paragraph) shall be included in all copies or substantial portions
  22  * of the Software.
  23  *
  24  */
  25 /*
  26  * Authors: Dave Airlie <airlied@redhat.com>
  27  */
  28 #include <drm/drmP.h>
  29 #include "ast_drv.h"
  30
  31
  32 #include <drm/drm_fb_helper.h>
  33 #include <drm/drm_crtc_helper.h>
  34
  35 #include "ast_dram_tables.h"
  36
  37 void ast_set_index_reg_mask(struct ast_private *ast,
  38                             uint32_t base, uint8_t index,
  39                             uint8_t mask, uint8_t val)
  40 {
  41         u8 tmp;
  42         ast_io_write8(ast, base, index);
  43         tmp = (ast_io_read8(ast, base + 1) & mask) | val;
  44         ast_set_index_reg(ast, base, index, tmp);
  45 }
  46
  47 uint8_t ast_get_index_reg(struct ast_private *ast,
  48                           uint32_t base, uint8_t index)
  49 {
  50         uint8_t ret;
  51         ast_io_write8(ast, base, index);
  52         ret = ast_io_read8(ast, base + 1);
  53         return ret;
  54 }
  55
  56 uint8_t ast_get_index_reg_mask(struct ast_private *ast,
  57                                uint32_t base, uint8_t index, uint8_t mask)
  58 {
  59         uint8_t ret;
  60         ast_io_write8(ast, base, index);
  61         ret = ast_io_read8(ast, base + 1) & mask;
  62         return ret;
  63 }
  64
  65
  66 static int ast_detect_chip(struct drm_device *dev, bool *need_post)
  67 {
  68         struct ast_private *ast = dev->dev_private;
  69         uint32_t data, jreg;
  70         ast_open_key(ast);
  71
  72         if (dev->pdev->device == PCI_CHIP_AST1180) {
  73                 ast->chip = AST1100;
  74                 DRM_INFO("AST 1180 detected\n");
  75         } else {
  76                 if (dev->pdev->revision >= 0x30) {
  77                         ast->chip = AST2400;
  78                         DRM_INFO("AST 2400 detected\n");
  79                 } else if (dev->pdev->revision >= 0x20) {
  80                         ast->chip = AST2300;
  81                         DRM_INFO("AST 2300 detected\n");
  82                 } else if (dev->pdev->revision >= 0x10) {
  83                         uint32_t data;
  84                         ast_write32(ast, 0xf004, 0x1e6e0000);
  85                         ast_write32(ast, 0xf000, 0x1);
  86
  87                         data = ast_read32(ast, 0x1207c);
  88                         switch (data & 0x0300) {
  89                         case 0x0200:
  90                                 ast->chip = AST1100;
  91                                 DRM_INFO("AST 1100 detected\n");
  92                                 break;
  93                         case 0x0100:
  94                                 ast->chip = AST2200;
  95                                 DRM_INFO("AST 2200 detected\n");
  96                                 break;
  97                         case 0x0000:
  98                                 ast->chip = AST2150;
  99                                 DRM_INFO("AST 2150 detected\n");
 100                                 break;
 101                         default:
 102                                 ast->chip = AST2100;
 103                                 DRM_INFO("AST 2100 detected\n");
 104                                 break;
 105                         }
 106                         ast->vga2_clone = false;
 107                 } else {
 108                         ast->chip = AST2000;
 109                         DRM_INFO("AST 2000 detected\n");
 110                 }
 111         }
 112
 113         /*
 114          * If VGA isn't enabled, we need to enable now or subsequent
 115          * access to the scratch registers will fail. We also inform
 116          * our caller that it needs to POST the chip
 117          * (Assumption: VGA not enabled -> need to POST)
 118          */
 119         if (!ast_is_vga_enabled(dev)) {
 120                 ast_enable_vga(dev);
 121                 ast_enable_mmio(dev);
 122                 DRM_INFO("VGA not enabled on entry, requesting chip POST\n");
 123                 *need_post = true;
 124         } else
 125                 *need_post = false;
 126
 127         /* Check if we support wide screen */
 128         switch (ast->chip) {
 129         case AST1180:
 130                 ast->support_wide_screen = true;
 131                 break;
 132         case AST2000:
 133                 ast->support_wide_screen = false;
 134                 break;
 135         default:
 136                 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff);
 137                 if (!(jreg & 0x80))
 138                         ast->support_wide_screen = true;
 139                 else if (jreg & 0x01)
 140                         ast->support_wide_screen = true;
 141                 else {
 142                         ast->support_wide_screen = false;
 143                         /* Read SCU7c (silicon revision register) */
 144                         ast_write32(ast, 0xf004, 0x1e6e0000);
 145                         ast_write32(ast, 0xf000, 0x1);
 146                         data = ast_read32(ast, 0x1207c);
 147                         data &= 0x300;
 148                         if (ast->chip == AST2300 && data == 0x0) /* ast1300 */
 149                                 ast->support_wide_screen = true;
 150                         if (ast->chip == AST2400 && data == 0x100) /* ast1400 */
 151                                 ast->support_wide_screen = true;
 152                 }
 153                 break;
 154         }
 155
 156         /* Check 3rd Tx option (digital output afaik) */
 157         ast->tx_chip_type = AST_TX_NONE;
 158
 159         /*
 160          * VGACRA3 Enhanced Color Mode Register, check if DVO is already
 161          * enabled, in that case, assume we have a SIL164 TMDS transmitter
 162          *
 163          * Don't make that assumption if we the chip wasn't enabled and
 164          * is at power-on reset, otherwise we'll incorrectly "detect" a
 165          * SIL164 when there is none.
 166          */
 167         if (!*need_post) {
 168                 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xff);
 169                 if (jreg & 0x80)
 170                         ast->tx_chip_type = AST_TX_SIL164;
 171         }
 172
 173         if ((ast->chip == AST2300) || (ast->chip == AST2400)) {
 174                 /*
 175                  * On AST2300 and 2400, look the configuration set by the SoC in
 176                  * the SOC scratch register #1 bits 11:8 (interestingly marked
 177                  * as "reserved" in the spec)
 178                  */
 179                 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
 180                 switch (jreg) {
 181                 case 0x04:
 182                         ast->tx_chip_type = AST_TX_SIL164;
 183                         break;
 184                 case 0x08:
 185                         ast->dp501_fw_addr = kzalloc(32*1024, GFP_KERNEL);
 186                         if (ast->dp501_fw_addr) {
 187                                 /* backup firmware */
 188                                 if (ast_backup_fw(dev, ast->dp501_fw_addr, 32*1024)) {
 189                                         kfree(ast->dp501_fw_addr);
 190                                         ast->dp501_fw_addr = NULL;
 191                                 }
 192                         }
 193                         /* fallthrough */
 194                 case 0x0c:
 195                         ast->tx_chip_type = AST_TX_DP501;
 196                 }
 197         }
 198
 199         /* Print stuff for diagnostic purposes */
 200         switch(ast->tx_chip_type) {
 201         case AST_TX_SIL164:
 202                 DRM_INFO("Using Sil164 TMDS transmitter\n");
 203                 break;
 204         case AST_TX_DP501:
 205                 DRM_INFO("Using DP501 DisplayPort transmitter\n");
 206                 break;
 207         default:
 208                 DRM_INFO("Analog VGA only\n");
 209         }
 210         return 0;
 211 }
 212
 213 static int ast_get_dram_info(struct drm_device *dev)
 214 {
 215         struct ast_private *ast = dev->dev_private;
 216         uint32_t data, data2;
 217         uint32_t denum, num, div, ref_pll;
 218
 219         ast_write32(ast, 0xf004, 0x1e6e0000);
 220         ast_write32(ast, 0xf000, 0x1);
 221
 222
 223         ast_write32(ast, 0x10000, 0xfc600309);
 224
 225         do {
 226                 ;
 227         } while (ast_read32(ast, 0x10000) != 0x01);
 228         data = ast_read32(ast, 0x10004);
 229
 230         if (data & 0x400)
 231                 ast->dram_bus_width = 16;
 232         else
 233                 ast->dram_bus_width = 32;
 234
 235         if (ast->chip == AST2300 || ast->chip == AST2400) {
 236                 switch (data & 0x03) {
 237                 case 0:
 238                         ast->dram_type = AST_DRAM_512Mx16;
 239                         break;
 240                 default:
 241                 case 1:
 242                         ast->dram_type = AST_DRAM_1Gx16;
 243                         break;
 244                 case 2:
 245                         ast->dram_type = AST_DRAM_2Gx16;
 246                         break;
 247                 case 3:
 248                         ast->dram_type = AST_DRAM_4Gx16;
 249                         break;
 250                 }
 251         } else {
 252                 switch (data & 0x0c) {
 253                 case 0:
 254                 case 4:
 255                         ast->dram_type = AST_DRAM_512Mx16;
 256                         break;
 257                 case 8:
 258                         if (data & 0x40)
 259                                 ast->dram_type = AST_DRAM_1Gx16;
 260                         else
 261                                 ast->dram_type = AST_DRAM_512Mx32;
 262                         break;
 263                 case 0xc:
 264                         ast->dram_type = AST_DRAM_1Gx32;
 265                         break;
 266                 }
 267         }
 268
 269         data = ast_read32(ast, 0x10120);
 270         data2 = ast_read32(ast, 0x10170);
 271         if (data2 & 0x2000)
 272                 ref_pll = 14318;
 273         else
 274                 ref_pll = 12000;
 275
 276         denum = data & 0x1f;
 277         num = (data & 0x3fe0) >> 5;
 278         data = (data & 0xc000) >> 14;
 279         switch (data) {
 280         case 3:
 281                 div = 0x4;
 282                 break;
 283         case 2:
 284         case 1:
 285                 div = 0x2;
 286                 break;
 287         default:
 288                 div = 0x1;
 289                 break;
 290         }
 291         ast->mclk = ref_pll * (num + 2) / (denum + 2) * (div * 1000);
 292         return 0;
 293 }
 294
 295 static void ast_user_framebuffer_destroy(struct drm_framebuffer *fb)
 296 {
 297         struct ast_framebuffer *ast_fb = to_ast_framebuffer(fb);
 298         if (ast_fb->obj)
 299                 drm_gem_object_unreference_unlocked(ast_fb->obj);
 300
 301         drm_framebuffer_cleanup(fb);
 302         kfree(fb);
 303 }
 304
 305 static const struct drm_framebuffer_funcs ast_fb_funcs = {
 306         .destroy = ast_user_framebuffer_destroy,
 307 };
 308
 309
 310 int ast_framebuffer_init(struct drm_device *dev,
 311                          struct ast_framebuffer *ast_fb,
 312                          struct drm_mode_fb_cmd2 *mode_cmd,
 313                          struct drm_gem_object *obj)
 314 {
 315         int ret;
 316
 317         drm_helper_mode_fill_fb_struct(&ast_fb->base, mode_cmd);
 318         ast_fb->obj = obj;
 319         ret = drm_framebuffer_init(dev, &ast_fb->base, &ast_fb_funcs);
 320         if (ret) {
 321                 DRM_ERROR("framebuffer init failed %d\n", ret);
 322                 return ret;
 323         }
 324         return 0;
 325 }
 326
 327 static struct drm_framebuffer *
 328 ast_user_framebuffer_create(struct drm_device *dev,
 329                struct drm_file *filp,
 330                struct drm_mode_fb_cmd2 *mode_cmd)
 331 {
 332         struct drm_gem_object *obj;
 333         struct ast_framebuffer *ast_fb;
 334         int ret;
 335
 336         obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]);
 337         if (obj == NULL)
 338                 return ERR_PTR(-ENOENT);
 339
 340         ast_fb = kzalloc(sizeof(*ast_fb), GFP_KERNEL);
 341         if (!ast_fb) {
 342                 drm_gem_object_unreference_unlocked(obj);
 343                 return ERR_PTR(-ENOMEM);
 344         }
 345
 346         ret = ast_framebuffer_init(dev, ast_fb, mode_cmd, obj);
 347         if (ret) {
 348                 drm_gem_object_unreference_unlocked(obj);
 349                 kfree(ast_fb);
 350                 return ERR_PTR(ret);
 351         }
 352         return &ast_fb->base;
 353 }
 354
 355 static const struct drm_mode_config_funcs ast_mode_funcs = {
 356         .fb_create = ast_user_framebuffer_create,
 357 };
 358
 359 static u32 ast_get_vram_info(struct drm_device *dev)
 360 {
 361         struct ast_private *ast = dev->dev_private;
 362         u8 jreg;
 363         u32 vram_size;
 364         ast_open_key(ast);
 365
 366         vram_size = AST_VIDMEM_DEFAULT_SIZE;
 367         jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xaa, 0xff);
 368         switch (jreg & 3) {
 369         case 0: vram_size = AST_VIDMEM_SIZE_8M; break;
 370         case 1: vram_size = AST_VIDMEM_SIZE_16M; break;
 371         case 2: vram_size = AST_VIDMEM_SIZE_32M; break;
 372         case 3: vram_size = AST_VIDMEM_SIZE_64M; break;
 373         }
 374
 375         jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x99, 0xff);
 376         switch (jreg & 0x03) {
 377         case 1:
 378                 vram_size -= 0x100000;
 379                 break;
 380         case 2:
 381                 vram_size -= 0x200000;
 382                 break;
 383         case 3:
 384                 vram_size -= 0x400000;
 385                 break;
 386         }
 387
 388         return vram_size;
 389 }
 390
 391 int ast_driver_load(struct drm_device *dev, unsigned long flags)
 392 {
 393         struct ast_private *ast;
 394         bool need_post;
 395         int ret = 0;
 396
 397         ast = kzalloc(sizeof(struct ast_private), GFP_KERNEL);
 398         if (!ast)
 399                 return -ENOMEM;
 400
 401         dev->dev_private = ast;
 402         ast->dev = dev;
 403
 404         ast->regs = pci_iomap(dev->pdev, 1, 0);
 405         if (!ast->regs) {
 406                 ret = -EIO;
 407                 goto out_free;
 408         }
 409
 410         /*
 411          * If we don't have IO space at all, use MMIO now and
 412          * assume the chip has MMIO enabled by default (rev 0x20
 413          * and higher).
 414          */
 415         if (!(pci_resource_flags(dev->pdev, 2) & IORESOURCE_IO)) {
 416                 DRM_INFO("platform has no IO space, trying MMIO\n");
 417                 ast->ioregs = ast->regs + AST_IO_MM_OFFSET;
 418         }
 419
 420         /* "map" IO regs if the above hasn't done so already */
 421         if (!ast->ioregs) {
 422                 ast->ioregs = pci_iomap(dev->pdev, 2, 0);
 423                 if (!ast->ioregs) {
 424                         ret = -EIO;
 425                         goto out_free;
 426                 }
 427         }
 428
 429         ast_detect_chip(dev, &need_post);
 430
 431         if (ast->chip != AST1180) {
 432                 ast_get_dram_info(dev);
 433                 ast->vram_size = ast_get_vram_info(dev);
 434                 DRM_INFO("dram %d %d %d %08x\n", ast->mclk, ast->dram_type, ast->dram_bus_width, ast->vram_size);
 435         }
 436
 437         if (need_post)
 438                 ast_post_gpu(dev);
 439
 440         ret = ast_mm_init(ast);
 441         if (ret)
 442                 goto out_free;
 443
 444         drm_mode_config_init(dev);
 445
 446         dev->mode_config.funcs = (void *)&ast_mode_funcs;
 447         dev->mode_config.min_width = 0;
 448         dev->mode_config.min_height = 0;
 449         dev->mode_config.preferred_depth = 24;
 450         dev->mode_config.prefer_shadow = 1;
 451
 452         if (ast->chip == AST2100 ||
 453             ast->chip == AST2200 ||
 454             ast->chip == AST2300 ||
 455             ast->chip == AST2400 ||
 456             ast->chip == AST1180) {
 457                 dev->mode_config.max_width = 1920;
 458                 dev->mode_config.max_height = 2048;
 459         } else {
 460                 dev->mode_config.max_width = 1600;
 461                 dev->mode_config.max_height = 1200;
 462         }
 463
 464         ret = ast_mode_init(dev);
 465         if (ret)
 466                 goto out_free;
 467
 468         ret = ast_fbdev_init(dev);
 469         if (ret)
 470                 goto out_free;
 471
 472         return 0;
 473 out_free:
 474         kfree(ast);
 475         dev->dev_private = NULL;
 476         return ret;
 477 }
 478
 479 int ast_driver_unload(struct drm_device *dev)
 480 {
 481         struct ast_private *ast = dev->dev_private;
 482
 483         kfree(ast->dp501_fw_addr);
 484         ast_mode_fini(dev);
 485         ast_fbdev_fini(dev);
 486         drm_mode_config_cleanup(dev);
 487
 488         ast_mm_fini(ast);
 489         pci_iounmap(dev->pdev, ast->ioregs);
 490         pci_iounmap(dev->pdev, ast->regs);
 491         kfree(ast);
 492         return 0;
 493 }
 494
 495 int ast_gem_create(struct drm_device *dev,
 496                    u32 size, bool iskernel,
 497                    struct drm_gem_object **obj)
 498 {
 499         struct ast_bo *astbo;
 500         int ret;
 501
 502         *obj = NULL;
 503
 504         size = roundup(size, PAGE_SIZE);
 505         if (size == 0)
 506                 return -EINVAL;
 507
 508         ret = ast_bo_create(dev, size, 0, 0, &astbo);
 509         if (ret) {
 510                 if (ret != -ERESTARTSYS)
 511                         DRM_ERROR("failed to allocate GEM object\n");
 512                 return ret;
 513         }
 514         *obj = &astbo->gem;
 515         return 0;
 516 }
 517
 518 int ast_dumb_create(struct drm_file *file,
 519                     struct drm_device *dev,
 520                     struct drm_mode_create_dumb *args)
 521 {
 522         int ret;
 523         struct drm_gem_object *gobj;
 524         u32 handle;
 525
 526         args->pitch = args->width * ((args->bpp + 7) / 8);
 527         args->size = args->pitch * args->height;
 528
 529         ret = ast_gem_create(dev, args->size, false,
 530                              &gobj);
 531         if (ret)
 532                 return ret;
 533
 534         ret = drm_gem_handle_create(file, gobj, &handle);
 535         drm_gem_object_unreference_unlocked(gobj);
 536         if (ret)
 537                 return ret;
 538
 539         args->handle = handle;
 540         return 0;
 541 }
 542
 543 static void ast_bo_unref(struct ast_bo **bo)
 544 {
 545         struct ttm_buffer_object *tbo;
 546
 547         if ((*bo) == NULL)
 548                 return;
 549
 550         tbo = &((*bo)->bo);
 551         ttm_bo_unref(&tbo);
 552         *bo = NULL;
 553 }
 554
 555 void ast_gem_free_object(struct drm_gem_object *obj)
 556 {
 557         struct ast_bo *ast_bo = gem_to_ast_bo(obj);
 558
 559         ast_bo_unref(&ast_bo);
 560 }
 561
 562
 563 static inline u64 ast_bo_mmap_offset(struct ast_bo *bo)
 564 {
 565         return drm_vma_node_offset_addr(&bo->bo.vma_node);
 566 }
 567 int
 568 ast_dumb_mmap_offset(struct drm_file *file,
 569                      struct drm_device *dev,
 570                      uint32_t handle,
 571                      uint64_t *offset)
 572 {
 573         struct drm_gem_object *obj;
 574         int ret;
 575         struct ast_bo *bo;
 576
 577         mutex_lock(&dev->struct_mutex);
 578         obj = drm_gem_object_lookup(dev, file, handle);
 579         if (obj == NULL) {
 580                 ret = -ENOENT;
 581                 goto out_unlock;
 582         }
 583
 584         bo = gem_to_ast_bo(obj);
 585         *offset = ast_bo_mmap_offset(bo);
 586
 587         drm_gem_object_unreference(obj);
 588         ret = 0;
 589 out_unlock:
 590         mutex_unlock(&dev->struct_mutex);
 591         return ret;
 592
 593 }
 594