drivers/gpu/drm/radeon/radeon_bios.c

   1 /*
   2  * Copyright 2008 Advanced Micro Devices, Inc.
   3  * Copyright 2008 Red Hat Inc.
   4  * Copyright 2009 Jerome Glisse.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors: Dave Airlie
  25  *          Alex Deucher
  26  *          Jerome Glisse
  27  */
  28 #include "drmP.h"
  29 #include "radeon_reg.h"
  30 #include "radeon.h"
  31 #include "atom.h"
  32
  33 /*
  34  * BIOS.
  35  */
  36
  37 /* If you boot an IGP board with a discrete card as the primary,
  38  * the IGP rom is not accessible via the rom bar as the IGP rom is
  39  * part of the system bios.  On boot, the system bios puts a
  40  * copy of the igp rom at the start of vram if a discrete card is
  41  * present.
  42  */
  43 static bool igp_read_bios_from_vram(struct radeon_device *rdev)
  44 {
  45         uint8_t __iomem *bios;
  46         resource_size_t vram_base;
  47         resource_size_t size = 256 * 1024; /* ??? */
  48
  49         rdev->bios = NULL;
  50         vram_base = drm_get_resource_start(rdev->ddev, 0);
  51         bios = ioremap(vram_base, size);
  52         if (!bios) {
  53                 DRM_ERROR("Unable to mmap vram\n");
  54                 return false;
  55         }
  56
  57         if (size == 0 || bios[0] != 0x55 || bios[1] != 0xaa) {
  58                 iounmap(bios);
  59                 DRM_ERROR("bad rom signature\n");
  60                 return false;
  61         }
  62         rdev->bios = kmalloc(size, GFP_KERNEL);
  63         if (rdev->bios == NULL) {
  64                 iounmap(bios);
  65                 DRM_ERROR("kmalloc failed\n");
  66                 return false;
  67         }
  68         memcpy(rdev->bios, bios, size);
  69         iounmap(bios);
  70         return true;
  71 }
  72
  73 static bool radeon_read_bios(struct radeon_device *rdev)
  74 {
  75         uint8_t __iomem *bios;
  76         size_t size;
  77
  78         rdev->bios = NULL;
  79         /* XXX: some cards may return 0 for rom size? ddx has a workaround */
  80         bios = pci_map_rom(rdev->pdev, &size);
  81         if (!bios) {
  82                 return false;
  83         }
  84
  85         if (size == 0 || bios[0] != 0x55 || bios[1] != 0xaa) {
  86                 pci_unmap_rom(rdev->pdev, bios);
  87                 return false;
  88         }
  89         rdev->bios = kmalloc(size, GFP_KERNEL);
  90         if (rdev->bios == NULL) {
  91                 pci_unmap_rom(rdev->pdev, bios);
  92                 return false;
  93         }
  94         memcpy(rdev->bios, bios, size);
  95         pci_unmap_rom(rdev->pdev, bios);
  96         return true;
  97 }
  98
  99 static bool r700_read_disabled_bios(struct radeon_device *rdev)
 100 {
 101         uint32_t viph_control;
 102         uint32_t bus_cntl;
 103         uint32_t d1vga_control;
 104         uint32_t d2vga_control;
 105         uint32_t vga_render_control;
 106         uint32_t rom_cntl;
 107         uint32_t cg_spll_func_cntl = 0;
 108         uint32_t cg_spll_status;
 109         bool r;
 110
 111         viph_control = RREG32(RADEON_VIPH_CONTROL);
 112         bus_cntl = RREG32(RADEON_BUS_CNTL);
 113         d1vga_control = RREG32(AVIVO_D1VGA_CONTROL);
 114         d2vga_control = RREG32(AVIVO_D2VGA_CONTROL);
 115         vga_render_control = RREG32(AVIVO_VGA_RENDER_CONTROL);
 116         rom_cntl = RREG32(R600_ROM_CNTL);
 117
 118         /* disable VIP */
 119         WREG32(RADEON_VIPH_CONTROL, (viph_control & ~RADEON_VIPH_EN));
 120         /* enable the rom */
 121         WREG32(RADEON_BUS_CNTL, (bus_cntl & ~RADEON_BUS_BIOS_DIS_ROM));
 122         /* Disable VGA mode */
 123         WREG32(AVIVO_D1VGA_CONTROL,
 124                (d1vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |
 125                 AVIVO_DVGA_CONTROL_TIMING_SELECT)));
 126         WREG32(AVIVO_D2VGA_CONTROL,
 127                (d2vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |
 128                 AVIVO_DVGA_CONTROL_TIMING_SELECT)));
 129         WREG32(AVIVO_VGA_RENDER_CONTROL,
 130                (vga_render_control & ~AVIVO_VGA_VSTATUS_CNTL_MASK));
 131
 132         if (rdev->family == CHIP_RV730) {
 133                 cg_spll_func_cntl = RREG32(R600_CG_SPLL_FUNC_CNTL);
 134
 135                 /* enable bypass mode */
 136                 WREG32(R600_CG_SPLL_FUNC_CNTL, (cg_spll_func_cntl |
 137                                                 R600_SPLL_BYPASS_EN));
 138
 139                 /* wait for SPLL_CHG_STATUS to change to 1 */
 140                 cg_spll_status = 0;
 141                 while (!(cg_spll_status & R600_SPLL_CHG_STATUS))
 142                         cg_spll_status = RREG32(R600_CG_SPLL_STATUS);
 143
 144                 WREG32(R600_ROM_CNTL, (rom_cntl & ~R600_SCK_OVERWRITE));
 145         } else
 146                 WREG32(R600_ROM_CNTL, (rom_cntl | R600_SCK_OVERWRITE));
 147
 148         r = radeon_read_bios(rdev);
 149
 150         /* restore regs */
 151         if (rdev->family == CHIP_RV730) {
 152                 WREG32(R600_CG_SPLL_FUNC_CNTL, cg_spll_func_cntl);
 153
 154                 /* wait for SPLL_CHG_STATUS to change to 1 */
 155                 cg_spll_status = 0;
 156                 while (!(cg_spll_status & R600_SPLL_CHG_STATUS))
 157                         cg_spll_status = RREG32(R600_CG_SPLL_STATUS);
 158         }
 159         WREG32(RADEON_VIPH_CONTROL, viph_control);
 160         WREG32(RADEON_BUS_CNTL, bus_cntl);
 161         WREG32(AVIVO_D1VGA_CONTROL, d1vga_control);
 162         WREG32(AVIVO_D2VGA_CONTROL, d2vga_control);
 163         WREG32(AVIVO_VGA_RENDER_CONTROL, vga_render_control);
 164         WREG32(R600_ROM_CNTL, rom_cntl);
 165         return r;
 166 }
 167
 168 static bool r600_read_disabled_bios(struct radeon_device *rdev)
 169 {
 170         uint32_t viph_control;
 171         uint32_t bus_cntl;
 172         uint32_t d1vga_control;
 173         uint32_t d2vga_control;
 174         uint32_t vga_render_control;
 175         uint32_t rom_cntl;
 176         uint32_t general_pwrmgt;
 177         uint32_t low_vid_lower_gpio_cntl;
 178         uint32_t medium_vid_lower_gpio_cntl;
 179         uint32_t high_vid_lower_gpio_cntl;
 180         uint32_t ctxsw_vid_lower_gpio_cntl;
 181         uint32_t lower_gpio_enable;
 182         bool r;
 183
 184         viph_control = RREG32(RADEON_VIPH_CONTROL);
 185         bus_cntl = RREG32(RADEON_BUS_CNTL);
 186         d1vga_control = RREG32(AVIVO_D1VGA_CONTROL);
 187         d2vga_control = RREG32(AVIVO_D2VGA_CONTROL);
 188         vga_render_control = RREG32(AVIVO_VGA_RENDER_CONTROL);
 189         rom_cntl = RREG32(R600_ROM_CNTL);
 190         general_pwrmgt = RREG32(R600_GENERAL_PWRMGT);
 191         low_vid_lower_gpio_cntl = RREG32(R600_LOW_VID_LOWER_GPIO_CNTL);
 192         medium_vid_lower_gpio_cntl = RREG32(R600_MEDIUM_VID_LOWER_GPIO_CNTL);
 193         high_vid_lower_gpio_cntl = RREG32(R600_HIGH_VID_LOWER_GPIO_CNTL);
 194         ctxsw_vid_lower_gpio_cntl = RREG32(R600_CTXSW_VID_LOWER_GPIO_CNTL);
 195         lower_gpio_enable = RREG32(R600_LOWER_GPIO_ENABLE);
 196
 197         /* disable VIP */
 198         WREG32(RADEON_VIPH_CONTROL, (viph_control & ~RADEON_VIPH_EN));
 199         /* enable the rom */
 200         WREG32(RADEON_BUS_CNTL, (bus_cntl & ~RADEON_BUS_BIOS_DIS_ROM));
 201         /* Disable VGA mode */
 202         WREG32(AVIVO_D1VGA_CONTROL,
 203                (d1vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |
 204                 AVIVO_DVGA_CONTROL_TIMING_SELECT)));
 205         WREG32(AVIVO_D2VGA_CONTROL,
 206                (d2vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |
 207                 AVIVO_DVGA_CONTROL_TIMING_SELECT)));
 208         WREG32(AVIVO_VGA_RENDER_CONTROL,
 209                (vga_render_control & ~AVIVO_VGA_VSTATUS_CNTL_MASK));
 210
 211         WREG32(R600_ROM_CNTL,
 212                ((rom_cntl & ~R600_SCK_PRESCALE_CRYSTAL_CLK_MASK) |
 213                 (1 << R600_SCK_PRESCALE_CRYSTAL_CLK_SHIFT) |
 214                 R600_SCK_OVERWRITE));
 215
 216         WREG32(R600_GENERAL_PWRMGT, (general_pwrmgt & ~R600_OPEN_DRAIN_PADS));
 217         WREG32(R600_LOW_VID_LOWER_GPIO_CNTL,
 218                (low_vid_lower_gpio_cntl & ~0x400));
 219         WREG32(R600_MEDIUM_VID_LOWER_GPIO_CNTL,
 220                (medium_vid_lower_gpio_cntl & ~0x400));
 221         WREG32(R600_HIGH_VID_LOWER_GPIO_CNTL,
 222                (high_vid_lower_gpio_cntl & ~0x400));
 223         WREG32(R600_CTXSW_VID_LOWER_GPIO_CNTL,
 224                (ctxsw_vid_lower_gpio_cntl & ~0x400));
 225         WREG32(R600_LOWER_GPIO_ENABLE, (lower_gpio_enable | 0x400));
 226
 227         r = radeon_read_bios(rdev);
 228
 229         /* restore regs */
 230         WREG32(RADEON_VIPH_CONTROL, viph_control);
 231         WREG32(RADEON_BUS_CNTL, bus_cntl);
 232         WREG32(AVIVO_D1VGA_CONTROL, d1vga_control);
 233         WREG32(AVIVO_D2VGA_CONTROL, d2vga_control);
 234         WREG32(AVIVO_VGA_RENDER_CONTROL, vga_render_control);
 235         WREG32(R600_ROM_CNTL, rom_cntl);
 236         WREG32(R600_GENERAL_PWRMGT, general_pwrmgt);
 237         WREG32(R600_LOW_VID_LOWER_GPIO_CNTL, low_vid_lower_gpio_cntl);
 238         WREG32(R600_MEDIUM_VID_LOWER_GPIO_CNTL, medium_vid_lower_gpio_cntl);
 239         WREG32(R600_HIGH_VID_LOWER_GPIO_CNTL, high_vid_lower_gpio_cntl);
 240         WREG32(R600_CTXSW_VID_LOWER_GPIO_CNTL, ctxsw_vid_lower_gpio_cntl);
 241         WREG32(R600_LOWER_GPIO_ENABLE, lower_gpio_enable);
 242         return r;
 243 }
 244
 245 static bool avivo_read_disabled_bios(struct radeon_device *rdev)
 246 {
 247         uint32_t seprom_cntl1;
 248         uint32_t viph_control;
 249         uint32_t bus_cntl;
 250         uint32_t d1vga_control;
 251         uint32_t d2vga_control;
 252         uint32_t vga_render_control;
 253         uint32_t gpiopad_a;
 254         uint32_t gpiopad_en;
 255         uint32_t gpiopad_mask;
 256         bool r;
 257
 258         seprom_cntl1 = RREG32(RADEON_SEPROM_CNTL1);
 259         viph_control = RREG32(RADEON_VIPH_CONTROL);
 260         bus_cntl = RREG32(RADEON_BUS_CNTL);
 261         d1vga_control = RREG32(AVIVO_D1VGA_CONTROL);
 262         d2vga_control = RREG32(AVIVO_D2VGA_CONTROL);
 263         vga_render_control = RREG32(AVIVO_VGA_RENDER_CONTROL);
 264         gpiopad_a = RREG32(RADEON_GPIOPAD_A);
 265         gpiopad_en = RREG32(RADEON_GPIOPAD_EN);
 266         gpiopad_mask = RREG32(RADEON_GPIOPAD_MASK);
 267
 268         WREG32(RADEON_SEPROM_CNTL1,
 269                ((seprom_cntl1 & ~RADEON_SCK_PRESCALE_MASK) |
 270                 (0xc << RADEON_SCK_PRESCALE_SHIFT)));
 271         WREG32(RADEON_GPIOPAD_A, 0);
 272         WREG32(RADEON_GPIOPAD_EN, 0);
 273         WREG32(RADEON_GPIOPAD_MASK, 0);
 274
 275         /* disable VIP */
 276         WREG32(RADEON_VIPH_CONTROL, (viph_control & ~RADEON_VIPH_EN));
 277
 278         /* enable the rom */
 279         WREG32(RADEON_BUS_CNTL, (bus_cntl & ~RADEON_BUS_BIOS_DIS_ROM));
 280
 281         /* Disable VGA mode */
 282         WREG32(AVIVO_D1VGA_CONTROL,
 283                (d1vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |
 284                 AVIVO_DVGA_CONTROL_TIMING_SELECT)));
 285         WREG32(AVIVO_D2VGA_CONTROL,
 286                (d2vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |
 287                 AVIVO_DVGA_CONTROL_TIMING_SELECT)));
 288         WREG32(AVIVO_VGA_RENDER_CONTROL,
 289                (vga_render_control & ~AVIVO_VGA_VSTATUS_CNTL_MASK));
 290
 291         r = radeon_read_bios(rdev);
 292
 293         /* restore regs */
 294         WREG32(RADEON_SEPROM_CNTL1, seprom_cntl1);
 295         WREG32(RADEON_VIPH_CONTROL, viph_control);
 296         WREG32(RADEON_BUS_CNTL, bus_cntl);
 297         WREG32(AVIVO_D1VGA_CONTROL, d1vga_control);
 298         WREG32(AVIVO_D2VGA_CONTROL, d2vga_control);
 299         WREG32(AVIVO_VGA_RENDER_CONTROL, vga_render_control);
 300         WREG32(RADEON_GPIOPAD_A, gpiopad_a);
 301         WREG32(RADEON_GPIOPAD_EN, gpiopad_en);
 302         WREG32(RADEON_GPIOPAD_MASK, gpiopad_mask);
 303         return r;
 304 }
 305
 306 static bool legacy_read_disabled_bios(struct radeon_device *rdev)
 307 {
 308         uint32_t seprom_cntl1;
 309         uint32_t viph_control;
 310         uint32_t bus_cntl;
 311         uint32_t crtc_gen_cntl;
 312         uint32_t crtc2_gen_cntl;
 313         uint32_t crtc_ext_cntl;
 314         uint32_t fp2_gen_cntl;
 315         bool r;
 316
 317         seprom_cntl1 = RREG32(RADEON_SEPROM_CNTL1);
 318         viph_control = RREG32(RADEON_VIPH_CONTROL);
 319         bus_cntl = RREG32(RADEON_BUS_CNTL);
 320         crtc_gen_cntl = RREG32(RADEON_CRTC_GEN_CNTL);
 321         crtc2_gen_cntl = 0;
 322         crtc_ext_cntl = RREG32(RADEON_CRTC_EXT_CNTL);
 323         fp2_gen_cntl = 0;
 324
 325         if (rdev->ddev->pci_device == PCI_DEVICE_ID_ATI_RADEON_QY) {
 326                 fp2_gen_cntl = RREG32(RADEON_FP2_GEN_CNTL);
 327         }
 328
 329         if (!(rdev->flags & RADEON_SINGLE_CRTC)) {
 330                 crtc2_gen_cntl = RREG32(RADEON_CRTC2_GEN_CNTL);
 331         }
 332
 333         WREG32(RADEON_SEPROM_CNTL1,
 334                ((seprom_cntl1 & ~RADEON_SCK_PRESCALE_MASK) |
 335                 (0xc << RADEON_SCK_PRESCALE_SHIFT)));
 336
 337         /* disable VIP */
 338         WREG32(RADEON_VIPH_CONTROL, (viph_control & ~RADEON_VIPH_EN));
 339
 340         /* enable the rom */
 341         WREG32(RADEON_BUS_CNTL, (bus_cntl & ~RADEON_BUS_BIOS_DIS_ROM));
 342
 343         /* Turn off mem requests and CRTC for both controllers */
 344         WREG32(RADEON_CRTC_GEN_CNTL,
 345                ((crtc_gen_cntl & ~RADEON_CRTC_EN) |
 346                 (RADEON_CRTC_DISP_REQ_EN_B |
 347                  RADEON_CRTC_EXT_DISP_EN)));
 348         if (!(rdev->flags & RADEON_SINGLE_CRTC)) {
 349                 WREG32(RADEON_CRTC2_GEN_CNTL,
 350                        ((crtc2_gen_cntl & ~RADEON_CRTC2_EN) |
 351                         RADEON_CRTC2_DISP_REQ_EN_B));
 352         }
 353         /* Turn off CRTC */
 354         WREG32(RADEON_CRTC_EXT_CNTL,
 355                ((crtc_ext_cntl & ~RADEON_CRTC_CRT_ON) |
 356                 (RADEON_CRTC_SYNC_TRISTAT |
 357                  RADEON_CRTC_DISPLAY_DIS)));
 358
 359         if (rdev->ddev->pci_device == PCI_DEVICE_ID_ATI_RADEON_QY) {
 360                 WREG32(RADEON_FP2_GEN_CNTL, (fp2_gen_cntl & ~RADEON_FP2_ON));
 361         }
 362
 363         r = radeon_read_bios(rdev);
 364
 365         /* restore regs */
 366         WREG32(RADEON_SEPROM_CNTL1, seprom_cntl1);
 367         WREG32(RADEON_VIPH_CONTROL, viph_control);
 368         WREG32(RADEON_BUS_CNTL, bus_cntl);
 369         WREG32(RADEON_CRTC_GEN_CNTL, crtc_gen_cntl);
 370         if (!(rdev->flags & RADEON_SINGLE_CRTC)) {
 371                 WREG32(RADEON_CRTC2_GEN_CNTL, crtc2_gen_cntl);
 372         }
 373         WREG32(RADEON_CRTC_EXT_CNTL, crtc_ext_cntl);
 374         if (rdev->ddev->pci_device == PCI_DEVICE_ID_ATI_RADEON_QY) {
 375                 WREG32(RADEON_FP2_GEN_CNTL, fp2_gen_cntl);
 376         }
 377         return r;
 378 }
 379
 380 static bool radeon_read_disabled_bios(struct radeon_device *rdev)
 381 {
 382         if (rdev->flags & RADEON_IS_IGP)
 383                 return igp_read_bios_from_vram(rdev);
 384         else if (rdev->family >= CHIP_RV770)
 385                 return r700_read_disabled_bios(rdev);
 386         else if (rdev->family >= CHIP_R600)
 387                 return r600_read_disabled_bios(rdev);
 388         else if (rdev->family >= CHIP_RS600)
 389                 return avivo_read_disabled_bios(rdev);
 390         else
 391                 return legacy_read_disabled_bios(rdev);
 392 }
 393
 394 bool radeon_get_bios(struct radeon_device *rdev)
 395 {
 396         bool r;
 397         uint16_t tmp;
 398
 399         if (rdev->flags & RADEON_IS_IGP) {
 400                 r = igp_read_bios_from_vram(rdev);
 401                 if (r == false)
 402                         r = radeon_read_bios(rdev);
 403         } else
 404                 r = radeon_read_bios(rdev);
 405         if (r == false) {
 406                 r = radeon_read_disabled_bios(rdev);
 407         }
 408         if (r == false || rdev->bios == NULL) {
 409                 DRM_ERROR("Unable to locate a BIOS ROM\n");
 410                 rdev->bios = NULL;
 411                 return false;
 412         }
 413         if (rdev->bios[0] != 0x55 || rdev->bios[1] != 0xaa) {
 414                 goto free_bios;
 415         }
 416
 417         rdev->bios_header_start = RBIOS16(0x48);
 418         if (!rdev->bios_header_start) {
 419                 goto free_bios;
 420         }
 421         tmp = rdev->bios_header_start + 4;
 422         if (!memcmp(rdev->bios + tmp, "ATOM", 4) ||
 423             !memcmp(rdev->bios + tmp, "MOTA", 4)) {
 424                 rdev->is_atom_bios = true;
 425         } else {
 426                 rdev->is_atom_bios = false;
 427         }
 428
 429         DRM_DEBUG("%sBIOS detected\n", rdev->is_atom_bios ? "ATOM" : "COM");
 430         return true;
 431 free_bios:
 432         kfree(rdev->bios);
 433         rdev->bios = NULL;
 434         return false;
 435 }