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 29 #include <linux/pci.h> 30 31 #include <drm/drm_atomic_helper.h> 32 #include <drm/drm_crtc_helper.h> 33 #include <drm/drm_fb_helper.h> 34 #include <drm/drm_gem.h> 35 #include <drm/drm_gem_framebuffer_helper.h> 36 #include <drm/drm_gem_vram_helper.h> 37 38 #include "ast_drv.h" 39 40 void ast_set_index_reg_mask(struct ast_private *ast, 41 uint32_t base, uint8_t index, 42 uint8_t mask, uint8_t val) 43 { 44 u8 tmp; 45 ast_io_write8(ast, base, index); 46 tmp = (ast_io_read8(ast, base + 1) & mask) | val; 47 ast_set_index_reg(ast, base, index, tmp); 48 } 49 50 uint8_t ast_get_index_reg(struct ast_private *ast, 51 uint32_t base, uint8_t index) 52 { 53 uint8_t ret; 54 ast_io_write8(ast, base, index); 55 ret = ast_io_read8(ast, base + 1); 56 return ret; 57 } 58 59 uint8_t ast_get_index_reg_mask(struct ast_private *ast, 60 uint32_t base, uint8_t index, uint8_t mask) 61 { 62 uint8_t ret; 63 ast_io_write8(ast, base, index); 64 ret = ast_io_read8(ast, base + 1) & mask; 65 return ret; 66 } 67 68 static void ast_detect_config_mode(struct drm_device *dev, u32 *scu_rev) 69 { 70 struct device_node *np = dev->pdev->dev.of_node; 71 struct ast_private *ast = dev->dev_private; 72 uint32_t data, jregd0, jregd1; 73 74 /* Defaults */ 75 ast->config_mode = ast_use_defaults; 76 *scu_rev = 0xffffffff; 77 78 /* Check if we have device-tree properties */ 79 if (np && !of_property_read_u32(np, "aspeed,scu-revision-id", 80 scu_rev)) { 81 /* We do, disable P2A access */ 82 ast->config_mode = ast_use_dt; 83 DRM_INFO("Using device-tree for configuration\n"); 84 return; 85 } 86 87 /* Not all families have a P2A bridge */ 88 if (dev->pdev->device != PCI_CHIP_AST2000) 89 return; 90 91 /* 92 * The BMC will set SCU 0x40 D[12] to 1 if the P2 bridge 93 * is disabled. We force using P2A if VGA only mode bit 94 * is set D[7] 95 */ 96 jregd0 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff); 97 jregd1 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff); 98 if (!(jregd0 & 0x80) || !(jregd1 & 0x10)) { 99 /* Double check it's actually working */ 100 data = ast_read32(ast, 0xf004); 101 if (data != 0xFFFFFFFF) { 102 /* P2A works, grab silicon revision */ 103 ast->config_mode = ast_use_p2a; 104 105 DRM_INFO("Using P2A bridge for configuration\n"); 106 107 /* Read SCU7c (silicon revision register) */ 108 ast_write32(ast, 0xf004, 0x1e6e0000); 109 ast_write32(ast, 0xf000, 0x1); 110 *scu_rev = ast_read32(ast, 0x1207c); 111 return; 112 } 113 } 114 115 /* We have a P2A bridge but it's disabled */ 116 DRM_INFO("P2A bridge disabled, using default configuration\n"); 117 } 118 119 static int ast_detect_chip(struct drm_device *dev, bool *need_post) 120 { 121 struct ast_private *ast = dev->dev_private; 122 uint32_t jreg, scu_rev; 123 124 /* 125 * If VGA isn't enabled, we need to enable now or subsequent 126 * access to the scratch registers will fail. We also inform 127 * our caller that it needs to POST the chip 128 * (Assumption: VGA not enabled -> need to POST) 129 */ 130 if (!ast_is_vga_enabled(dev)) { 131 ast_enable_vga(dev); 132 DRM_INFO("VGA not enabled on entry, requesting chip POST\n"); 133 *need_post = true; 134 } else 135 *need_post = false; 136 137 138 /* Enable extended register access */ 139 ast_open_key(ast); 140 ast_enable_mmio(dev); 141 142 /* Find out whether P2A works or whether to use device-tree */ 143 ast_detect_config_mode(dev, &scu_rev); 144 145 /* Identify chipset */ 146 if (dev->pdev->device == PCI_CHIP_AST1180) { 147 ast->chip = AST1100; 148 DRM_INFO("AST 1180 detected\n"); 149 } else { 150 if (dev->pdev->revision >= 0x40) { 151 ast->chip = AST2500; 152 DRM_INFO("AST 2500 detected\n"); 153 } else if (dev->pdev->revision >= 0x30) { 154 ast->chip = AST2400; 155 DRM_INFO("AST 2400 detected\n"); 156 } else if (dev->pdev->revision >= 0x20) { 157 ast->chip = AST2300; 158 DRM_INFO("AST 2300 detected\n"); 159 } else if (dev->pdev->revision >= 0x10) { 160 switch (scu_rev & 0x0300) { 161 case 0x0200: 162 ast->chip = AST1100; 163 DRM_INFO("AST 1100 detected\n"); 164 break; 165 case 0x0100: 166 ast->chip = AST2200; 167 DRM_INFO("AST 2200 detected\n"); 168 break; 169 case 0x0000: 170 ast->chip = AST2150; 171 DRM_INFO("AST 2150 detected\n"); 172 break; 173 default: 174 ast->chip = AST2100; 175 DRM_INFO("AST 2100 detected\n"); 176 break; 177 } 178 ast->vga2_clone = false; 179 } else { 180 ast->chip = AST2000; 181 DRM_INFO("AST 2000 detected\n"); 182 } 183 } 184 185 /* Check if we support wide screen */ 186 switch (ast->chip) { 187 case AST1180: 188 ast->support_wide_screen = true; 189 break; 190 case AST2000: 191 ast->support_wide_screen = false; 192 break; 193 default: 194 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff); 195 if (!(jreg & 0x80)) 196 ast->support_wide_screen = true; 197 else if (jreg & 0x01) 198 ast->support_wide_screen = true; 199 else { 200 ast->support_wide_screen = false; 201 if (ast->chip == AST2300 && 202 (scu_rev & 0x300) == 0x0) /* ast1300 */ 203 ast->support_wide_screen = true; 204 if (ast->chip == AST2400 && 205 (scu_rev & 0x300) == 0x100) /* ast1400 */ 206 ast->support_wide_screen = true; 207 if (ast->chip == AST2500 && 208 scu_rev == 0x100) /* ast2510 */ 209 ast->support_wide_screen = true; 210 } 211 break; 212 } 213 214 /* Check 3rd Tx option (digital output afaik) */ 215 ast->tx_chip_type = AST_TX_NONE; 216 217 /* 218 * VGACRA3 Enhanced Color Mode Register, check if DVO is already 219 * enabled, in that case, assume we have a SIL164 TMDS transmitter 220 * 221 * Don't make that assumption if we the chip wasn't enabled and 222 * is at power-on reset, otherwise we'll incorrectly "detect" a 223 * SIL164 when there is none. 224 */ 225 if (!*need_post) { 226 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xff); 227 if (jreg & 0x80) 228 ast->tx_chip_type = AST_TX_SIL164; 229 } 230 231 if ((ast->chip == AST2300) || (ast->chip == AST2400)) { 232 /* 233 * On AST2300 and 2400, look the configuration set by the SoC in 234 * the SOC scratch register #1 bits 11:8 (interestingly marked 235 * as "reserved" in the spec) 236 */ 237 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff); 238 switch (jreg) { 239 case 0x04: 240 ast->tx_chip_type = AST_TX_SIL164; 241 break; 242 case 0x08: 243 ast->dp501_fw_addr = kzalloc(32*1024, GFP_KERNEL); 244 if (ast->dp501_fw_addr) { 245 /* backup firmware */ 246 if (ast_backup_fw(dev, ast->dp501_fw_addr, 32*1024)) { 247 kfree(ast->dp501_fw_addr); 248 ast->dp501_fw_addr = NULL; 249 } 250 } 251 /* fallthrough */ 252 case 0x0c: 253 ast->tx_chip_type = AST_TX_DP501; 254 } 255 } 256 257 /* Print stuff for diagnostic purposes */ 258 switch(ast->tx_chip_type) { 259 case AST_TX_SIL164: 260 DRM_INFO("Using Sil164 TMDS transmitter\n"); 261 break; 262 case AST_TX_DP501: 263 DRM_INFO("Using DP501 DisplayPort transmitter\n"); 264 break; 265 default: 266 DRM_INFO("Analog VGA only\n"); 267 } 268 return 0; 269 } 270 271 static int ast_get_dram_info(struct drm_device *dev) 272 { 273 struct device_node *np = dev->pdev->dev.of_node; 274 struct ast_private *ast = dev->dev_private; 275 uint32_t mcr_cfg, mcr_scu_mpll, mcr_scu_strap; 276 uint32_t denum, num, div, ref_pll, dsel; 277 278 switch (ast->config_mode) { 279 case ast_use_dt: 280 /* 281 * If some properties are missing, use reasonable 282 * defaults for AST2400 283 */ 284 if (of_property_read_u32(np, "aspeed,mcr-configuration", 285 &mcr_cfg)) 286 mcr_cfg = 0x00000577; 287 if (of_property_read_u32(np, "aspeed,mcr-scu-mpll", 288 &mcr_scu_mpll)) 289 mcr_scu_mpll = 0x000050C0; 290 if (of_property_read_u32(np, "aspeed,mcr-scu-strap", 291 &mcr_scu_strap)) 292 mcr_scu_strap = 0; 293 break; 294 case ast_use_p2a: 295 ast_write32(ast, 0xf004, 0x1e6e0000); 296 ast_write32(ast, 0xf000, 0x1); 297 mcr_cfg = ast_read32(ast, 0x10004); 298 mcr_scu_mpll = ast_read32(ast, 0x10120); 299 mcr_scu_strap = ast_read32(ast, 0x10170); 300 break; 301 case ast_use_defaults: 302 default: 303 ast->dram_bus_width = 16; 304 ast->dram_type = AST_DRAM_1Gx16; 305 if (ast->chip == AST2500) 306 ast->mclk = 800; 307 else 308 ast->mclk = 396; 309 return 0; 310 } 311 312 if (mcr_cfg & 0x40) 313 ast->dram_bus_width = 16; 314 else 315 ast->dram_bus_width = 32; 316 317 if (ast->chip == AST2500) { 318 switch (mcr_cfg & 0x03) { 319 case 0: 320 ast->dram_type = AST_DRAM_1Gx16; 321 break; 322 default: 323 case 1: 324 ast->dram_type = AST_DRAM_2Gx16; 325 break; 326 case 2: 327 ast->dram_type = AST_DRAM_4Gx16; 328 break; 329 case 3: 330 ast->dram_type = AST_DRAM_8Gx16; 331 break; 332 } 333 } else if (ast->chip == AST2300 || ast->chip == AST2400) { 334 switch (mcr_cfg & 0x03) { 335 case 0: 336 ast->dram_type = AST_DRAM_512Mx16; 337 break; 338 default: 339 case 1: 340 ast->dram_type = AST_DRAM_1Gx16; 341 break; 342 case 2: 343 ast->dram_type = AST_DRAM_2Gx16; 344 break; 345 case 3: 346 ast->dram_type = AST_DRAM_4Gx16; 347 break; 348 } 349 } else { 350 switch (mcr_cfg & 0x0c) { 351 case 0: 352 case 4: 353 ast->dram_type = AST_DRAM_512Mx16; 354 break; 355 case 8: 356 if (mcr_cfg & 0x40) 357 ast->dram_type = AST_DRAM_1Gx16; 358 else 359 ast->dram_type = AST_DRAM_512Mx32; 360 break; 361 case 0xc: 362 ast->dram_type = AST_DRAM_1Gx32; 363 break; 364 } 365 } 366 367 if (mcr_scu_strap & 0x2000) 368 ref_pll = 14318; 369 else 370 ref_pll = 12000; 371 372 denum = mcr_scu_mpll & 0x1f; 373 num = (mcr_scu_mpll & 0x3fe0) >> 5; 374 dsel = (mcr_scu_mpll & 0xc000) >> 14; 375 switch (dsel) { 376 case 3: 377 div = 0x4; 378 break; 379 case 2: 380 case 1: 381 div = 0x2; 382 break; 383 default: 384 div = 0x1; 385 break; 386 } 387 ast->mclk = ref_pll * (num + 2) / ((denum + 2) * (div * 1000)); 388 return 0; 389 } 390 391 enum drm_mode_status ast_mode_config_mode_valid(struct drm_device *dev, 392 const struct drm_display_mode *mode) 393 { 394 static const unsigned long max_bpp = 4; /* DRM_FORMAT_XRGBA8888 */ 395 396 struct ast_private *ast = dev->dev_private; 397 unsigned long fbsize, fbpages, max_fbpages; 398 399 /* To support double buffering, a framebuffer may not 400 * consume more than half of the available VRAM. 401 */ 402 max_fbpages = (ast->vram_size / 2) >> PAGE_SHIFT; 403 404 fbsize = mode->hdisplay * mode->vdisplay * max_bpp; 405 fbpages = DIV_ROUND_UP(fbsize, PAGE_SIZE); 406 407 if (fbpages > max_fbpages) 408 return MODE_MEM; 409 410 return MODE_OK; 411 } 412 413 static const struct drm_mode_config_funcs ast_mode_funcs = { 414 .fb_create = drm_gem_fb_create, 415 .mode_valid = ast_mode_config_mode_valid, 416 .atomic_check = drm_atomic_helper_check, 417 .atomic_commit = drm_atomic_helper_commit, 418 }; 419 420 static u32 ast_get_vram_info(struct drm_device *dev) 421 { 422 struct ast_private *ast = dev->dev_private; 423 u8 jreg; 424 u32 vram_size; 425 ast_open_key(ast); 426 427 vram_size = AST_VIDMEM_DEFAULT_SIZE; 428 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xaa, 0xff); 429 switch (jreg & 3) { 430 case 0: vram_size = AST_VIDMEM_SIZE_8M; break; 431 case 1: vram_size = AST_VIDMEM_SIZE_16M; break; 432 case 2: vram_size = AST_VIDMEM_SIZE_32M; break; 433 case 3: vram_size = AST_VIDMEM_SIZE_64M; break; 434 } 435 436 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x99, 0xff); 437 switch (jreg & 0x03) { 438 case 1: 439 vram_size -= 0x100000; 440 break; 441 case 2: 442 vram_size -= 0x200000; 443 break; 444 case 3: 445 vram_size -= 0x400000; 446 break; 447 } 448 449 return vram_size; 450 } 451 452 int ast_driver_load(struct drm_device *dev, unsigned long flags) 453 { 454 struct ast_private *ast; 455 bool need_post; 456 int ret = 0; 457 458 ast = kzalloc(sizeof(struct ast_private), GFP_KERNEL); 459 if (!ast) 460 return -ENOMEM; 461 462 dev->dev_private = ast; 463 ast->dev = dev; 464 465 ast->regs = pci_iomap(dev->pdev, 1, 0); 466 if (!ast->regs) { 467 ret = -EIO; 468 goto out_free; 469 } 470 471 /* 472 * If we don't have IO space at all, use MMIO now and 473 * assume the chip has MMIO enabled by default (rev 0x20 474 * and higher). 475 */ 476 if (!(pci_resource_flags(dev->pdev, 2) & IORESOURCE_IO)) { 477 DRM_INFO("platform has no IO space, trying MMIO\n"); 478 ast->ioregs = ast->regs + AST_IO_MM_OFFSET; 479 } 480 481 /* "map" IO regs if the above hasn't done so already */ 482 if (!ast->ioregs) { 483 ast->ioregs = pci_iomap(dev->pdev, 2, 0); 484 if (!ast->ioregs) { 485 ret = -EIO; 486 goto out_free; 487 } 488 } 489 490 ast_detect_chip(dev, &need_post); 491 492 if (need_post) 493 ast_post_gpu(dev); 494 495 if (ast->chip != AST1180) { 496 ret = ast_get_dram_info(dev); 497 if (ret) 498 goto out_free; 499 ast->vram_size = ast_get_vram_info(dev); 500 DRM_INFO("dram MCLK=%u Mhz type=%d bus_width=%d size=%08x\n", 501 ast->mclk, ast->dram_type, 502 ast->dram_bus_width, ast->vram_size); 503 } 504 505 ret = ast_mm_init(ast); 506 if (ret) 507 goto out_free; 508 509 drm_mode_config_init(dev); 510 511 dev->mode_config.funcs = (void *)&ast_mode_funcs; 512 dev->mode_config.min_width = 0; 513 dev->mode_config.min_height = 0; 514 dev->mode_config.preferred_depth = 24; 515 dev->mode_config.prefer_shadow = 1; 516 dev->mode_config.fb_base = pci_resource_start(ast->dev->pdev, 0); 517 518 if (ast->chip == AST2100 || 519 ast->chip == AST2200 || 520 ast->chip == AST2300 || 521 ast->chip == AST2400 || 522 ast->chip == AST2500 || 523 ast->chip == AST1180) { 524 dev->mode_config.max_width = 1920; 525 dev->mode_config.max_height = 2048; 526 } else { 527 dev->mode_config.max_width = 1600; 528 dev->mode_config.max_height = 1200; 529 } 530 531 ret = ast_mode_init(dev); 532 if (ret) 533 goto out_free; 534 535 drm_mode_config_reset(dev); 536 537 ret = drm_fbdev_generic_setup(dev, 32); 538 if (ret) 539 goto out_free; 540 541 return 0; 542 out_free: 543 kfree(ast); 544 dev->dev_private = NULL; 545 return ret; 546 } 547 548 void ast_driver_unload(struct drm_device *dev) 549 { 550 struct ast_private *ast = dev->dev_private; 551 552 /* enable standard VGA decode */ 553 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x04); 554 555 ast_release_firmware(dev); 556 kfree(ast->dp501_fw_addr); 557 ast_mode_fini(dev); 558 drm_mode_config_cleanup(dev); 559 560 ast_mm_fini(ast); 561 if (ast->ioregs != ast->regs + AST_IO_MM_OFFSET) 562 pci_iounmap(dev->pdev, ast->ioregs); 563 pci_iounmap(dev->pdev, ast->regs); 564 kfree(ast); 565 } 566