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                 return false;
  54         }
  55
  56         if (size == 0 || bios[0] != 0x55 || bios[1] != 0xaa) {
  57                 iounmap(bios);
  58                 return false;
  59         }
  60         rdev->bios = kmalloc(size, GFP_KERNEL);
  61         if (rdev->bios == NULL) {
  62                 iounmap(bios);
  63                 return false;
  64         }
  65         memcpy(rdev->bios, bios, size);
  66         iounmap(bios);
  67         return true;
  68 }
  69
  70 static bool radeon_read_bios(struct radeon_device *rdev)
  71 {
  72         uint8_t __iomem *bios;
  73         size_t size;
  74
  75         rdev->bios = NULL;
  76         /* XXX: some cards may return 0 for rom size? ddx has a workaround */
  77         bios = pci_map_rom(rdev->pdev, &size);
  78         if (!bios) {
  79                 return false;
  80         }
  81
  82         if (size == 0 || bios[0] != 0x55 || bios[1] != 0xaa) {
  83                 pci_unmap_rom(rdev->pdev, bios);
  84                 return false;
  85         }
  86         rdev->bios = kmalloc(size, GFP_KERNEL);
  87         if (rdev->bios == NULL) {
  88                 pci_unmap_rom(rdev->pdev, bios);
  89                 return false;
  90         }
  91         memcpy(rdev->bios, bios, size);
  92         pci_unmap_rom(rdev->pdev, bios);
  93         return true;
  94 }
  95
  96 static bool r700_read_disabled_bios(struct radeon_device *rdev)
  97 {
  98         uint32_t viph_control;
  99         uint32_t bus_cntl;
 100         uint32_t d1vga_control;
 101         uint32_t d2vga_control;
 102         uint32_t vga_render_control;
 103         uint32_t rom_cntl;
 104         uint32_t cg_spll_func_cntl = 0;
 105         uint32_t cg_spll_status;
 106         bool r;
 107
 108         viph_control = RREG32(RADEON_VIPH_CONTROL);
 109         bus_cntl = RREG32(RADEON_BUS_CNTL);
 110         d1vga_control = RREG32(AVIVO_D1VGA_CONTROL);
 111         d2vga_control = RREG32(AVIVO_D2VGA_CONTROL);
 112         vga_render_control = RREG32(AVIVO_VGA_RENDER_CONTROL);
 113         rom_cntl = RREG32(R600_ROM_CNTL);
 114
 115         /* disable VIP */
 116         WREG32(RADEON_VIPH_CONTROL, (viph_control & ~RADEON_VIPH_EN));
 117         /* enable the rom */
 118         WREG32(RADEON_BUS_CNTL, (bus_cntl & ~RADEON_BUS_BIOS_DIS_ROM));
 119         /* Disable VGA mode */
 120         WREG32(AVIVO_D1VGA_CONTROL,
 121                (d1vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |
 122                 AVIVO_DVGA_CONTROL_TIMING_SELECT)));
 123         WREG32(AVIVO_D2VGA_CONTROL,
 124                (d2vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |
 125                 AVIVO_DVGA_CONTROL_TIMING_SELECT)));
 126         WREG32(AVIVO_VGA_RENDER_CONTROL,
 127                (vga_render_control & ~AVIVO_VGA_VSTATUS_CNTL_MASK));
 128
 129         if (rdev->family == CHIP_RV730) {
 130                 cg_spll_func_cntl = RREG32(R600_CG_SPLL_FUNC_CNTL);
 131
 132                 /* enable bypass mode */
 133                 WREG32(R600_CG_SPLL_FUNC_CNTL, (cg_spll_func_cntl |
 134                                                 R600_SPLL_BYPASS_EN));
 135
 136                 /* wait for SPLL_CHG_STATUS to change to 1 */
 137                 cg_spll_status = 0;
 138                 while (!(cg_spll_status & R600_SPLL_CHG_STATUS))
 139                         cg_spll_status = RREG32(R600_CG_SPLL_STATUS);
 140
 141                 WREG32(R600_ROM_CNTL, (rom_cntl & ~R600_SCK_OVERWRITE));
 142         } else
 143                 WREG32(R600_ROM_CNTL, (rom_cntl | R600_SCK_OVERWRITE));
 144
 145         r = radeon_read_bios(rdev);
 146
 147         /* restore regs */
 148         if (rdev->family == CHIP_RV730) {
 149                 WREG32(R600_CG_SPLL_FUNC_CNTL, cg_spll_func_cntl);
 150
 151                 /* wait for SPLL_CHG_STATUS to change to 1 */
 152                 cg_spll_status = 0;
 153                 while (!(cg_spll_status & R600_SPLL_CHG_STATUS))
 154                         cg_spll_status = RREG32(R600_CG_SPLL_STATUS);
 155         }
 156         WREG32(RADEON_VIPH_CONTROL, viph_control);
 157         WREG32(RADEON_BUS_CNTL, bus_cntl);
 158         WREG32(AVIVO_D1VGA_CONTROL, d1vga_control);
 159         WREG32(AVIVO_D2VGA_CONTROL, d2vga_control);
 160         WREG32(AVIVO_VGA_RENDER_CONTROL, vga_render_control);
 161         WREG32(R600_ROM_CNTL, rom_cntl);
 162         return r;
 163 }
 164
 165 static bool r600_read_disabled_bios(struct radeon_device *rdev)
 166 {
 167         uint32_t viph_control;
 168         uint32_t bus_cntl;
 169         uint32_t d1vga_control;
 170         uint32_t d2vga_control;
 171         uint32_t vga_render_control;
 172         uint32_t rom_cntl;
 173         uint32_t general_pwrmgt;
 174         uint32_t low_vid_lower_gpio_cntl;
 175         uint32_t medium_vid_lower_gpio_cntl;
 176         uint32_t high_vid_lower_gpio_cntl;
 177         uint32_t ctxsw_vid_lower_gpio_cntl;
 178         uint32_t lower_gpio_enable;
 179         bool r;
 180
 181         viph_control = RREG32(RADEON_VIPH_CONTROL);
 182         bus_cntl = RREG32(RADEON_BUS_CNTL);
 183         d1vga_control = RREG32(AVIVO_D1VGA_CONTROL);
 184         d2vga_control = RREG32(AVIVO_D2VGA_CONTROL);
 185         vga_render_control = RREG32(AVIVO_VGA_RENDER_CONTROL);
 186         rom_cntl = RREG32(R600_ROM_CNTL);
 187         general_pwrmgt = RREG32(R600_GENERAL_PWRMGT);
 188         low_vid_lower_gpio_cntl = RREG32(R600_LOW_VID_LOWER_GPIO_CNTL);
 189         medium_vid_lower_gpio_cntl = RREG32(R600_MEDIUM_VID_LOWER_GPIO_CNTL);
 190         high_vid_lower_gpio_cntl = RREG32(R600_HIGH_VID_LOWER_GPIO_CNTL);
 191         ctxsw_vid_lower_gpio_cntl = RREG32(R600_CTXSW_VID_LOWER_GPIO_CNTL);
 192         lower_gpio_enable = RREG32(R600_LOWER_GPIO_ENABLE);
 193
 194         /* disable VIP */
 195         WREG32(RADEON_VIPH_CONTROL, (viph_control & ~RADEON_VIPH_EN));
 196         /* enable the rom */
 197         WREG32(RADEON_BUS_CNTL, (bus_cntl & ~RADEON_BUS_BIOS_DIS_ROM));
 198         /* Disable VGA mode */
 199         WREG32(AVIVO_D1VGA_CONTROL,
 200                (d1vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |
 201                 AVIVO_DVGA_CONTROL_TIMING_SELECT)));
 202         WREG32(AVIVO_D2VGA_CONTROL,
 203                (d2vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |
 204                 AVIVO_DVGA_CONTROL_TIMING_SELECT)));
 205         WREG32(AVIVO_VGA_RENDER_CONTROL,
 206                (vga_render_control & ~AVIVO_VGA_VSTATUS_CNTL_MASK));
 207
 208         WREG32(R600_ROM_CNTL,
 209                ((rom_cntl & ~R600_SCK_PRESCALE_CRYSTAL_CLK_MASK) |
 210                 (1 << R600_SCK_PRESCALE_CRYSTAL_CLK_SHIFT) |
 211                 R600_SCK_OVERWRITE));
 212
 213         WREG32(R600_GENERAL_PWRMGT, (general_pwrmgt & ~R600_OPEN_DRAIN_PADS));
 214         WREG32(R600_LOW_VID_LOWER_GPIO_CNTL,
 215                (low_vid_lower_gpio_cntl & ~0x400));
 216         WREG32(R600_MEDIUM_VID_LOWER_GPIO_CNTL,
 217                (medium_vid_lower_gpio_cntl & ~0x400));
 218         WREG32(R600_HIGH_VID_LOWER_GPIO_CNTL,
 219                (high_vid_lower_gpio_cntl & ~0x400));
 220         WREG32(R600_CTXSW_VID_LOWER_GPIO_CNTL,
 221                (ctxsw_vid_lower_gpio_cntl & ~0x400));
 222         WREG32(R600_LOWER_GPIO_ENABLE, (lower_gpio_enable | 0x400));
 223
 224         r = radeon_read_bios(rdev);
 225
 226         /* restore regs */
 227         WREG32(RADEON_VIPH_CONTROL, viph_control);
 228         WREG32(RADEON_BUS_CNTL, bus_cntl);
 229         WREG32(AVIVO_D1VGA_CONTROL, d1vga_control);
 230         WREG32(AVIVO_D2VGA_CONTROL, d2vga_control);
 231         WREG32(AVIVO_VGA_RENDER_CONTROL, vga_render_control);
 232         WREG32(R600_ROM_CNTL, rom_cntl);
 233         WREG32(R600_GENERAL_PWRMGT, general_pwrmgt);
 234         WREG32(R600_LOW_VID_LOWER_GPIO_CNTL, low_vid_lower_gpio_cntl);
 235         WREG32(R600_MEDIUM_VID_LOWER_GPIO_CNTL, medium_vid_lower_gpio_cntl);
 236         WREG32(R600_HIGH_VID_LOWER_GPIO_CNTL, high_vid_lower_gpio_cntl);
 237         WREG32(R600_CTXSW_VID_LOWER_GPIO_CNTL, ctxsw_vid_lower_gpio_cntl);
 238         WREG32(R600_LOWER_GPIO_ENABLE, lower_gpio_enable);
 239         return r;
 240 }
 241
 242 static bool avivo_read_disabled_bios(struct radeon_device *rdev)
 243 {
 244         uint32_t seprom_cntl1;
 245         uint32_t viph_control;
 246         uint32_t bus_cntl;
 247         uint32_t d1vga_control;
 248         uint32_t d2vga_control;
 249         uint32_t vga_render_control;
 250         uint32_t gpiopad_a;
 251         uint32_t gpiopad_en;
 252         uint32_t gpiopad_mask;
 253         bool r;
 254
 255         seprom_cntl1 = RREG32(RADEON_SEPROM_CNTL1);
 256         viph_control = RREG32(RADEON_VIPH_CONTROL);
 257         bus_cntl = RREG32(RADEON_BUS_CNTL);
 258         d1vga_control = RREG32(AVIVO_D1VGA_CONTROL);
 259         d2vga_control = RREG32(AVIVO_D2VGA_CONTROL);
 260         vga_render_control = RREG32(AVIVO_VGA_RENDER_CONTROL);
 261         gpiopad_a = RREG32(RADEON_GPIOPAD_A);
 262         gpiopad_en = RREG32(RADEON_GPIOPAD_EN);
 263         gpiopad_mask = RREG32(RADEON_GPIOPAD_MASK);
 264
 265         WREG32(RADEON_SEPROM_CNTL1,
 266                ((seprom_cntl1 & ~RADEON_SCK_PRESCALE_MASK) |
 267                 (0xc << RADEON_SCK_PRESCALE_SHIFT)));
 268         WREG32(RADEON_GPIOPAD_A, 0);
 269         WREG32(RADEON_GPIOPAD_EN, 0);
 270         WREG32(RADEON_GPIOPAD_MASK, 0);
 271
 272         /* disable VIP */
 273         WREG32(RADEON_VIPH_CONTROL, (viph_control & ~RADEON_VIPH_EN));
 274
 275         /* enable the rom */
 276         WREG32(RADEON_BUS_CNTL, (bus_cntl & ~RADEON_BUS_BIOS_DIS_ROM));
 277
 278         /* Disable VGA mode */
 279         WREG32(AVIVO_D1VGA_CONTROL,
 280                (d1vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |
 281                 AVIVO_DVGA_CONTROL_TIMING_SELECT)));
 282         WREG32(AVIVO_D2VGA_CONTROL,
 283                (d2vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |
 284                 AVIVO_DVGA_CONTROL_TIMING_SELECT)));
 285         WREG32(AVIVO_VGA_RENDER_CONTROL,
 286                (vga_render_control & ~AVIVO_VGA_VSTATUS_CNTL_MASK));
 287
 288         r = radeon_read_bios(rdev);
 289
 290         /* restore regs */
 291         WREG32(RADEON_SEPROM_CNTL1, seprom_cntl1);
 292         WREG32(RADEON_VIPH_CONTROL, viph_control);
 293         WREG32(RADEON_BUS_CNTL, bus_cntl);
 294         WREG32(AVIVO_D1VGA_CONTROL, d1vga_control);
 295         WREG32(AVIVO_D2VGA_CONTROL, d2vga_control);
 296         WREG32(AVIVO_VGA_RENDER_CONTROL, vga_render_control);
 297         WREG32(RADEON_GPIOPAD_A, gpiopad_a);
 298         WREG32(RADEON_GPIOPAD_EN, gpiopad_en);
 299         WREG32(RADEON_GPIOPAD_MASK, gpiopad_mask);
 300         return r;
 301 }
 302
 303 static bool legacy_read_disabled_bios(struct radeon_device *rdev)
 304 {
 305         uint32_t seprom_cntl1;
 306         uint32_t viph_control;
 307         uint32_t bus_cntl;
 308         uint32_t crtc_gen_cntl;
 309         uint32_t crtc2_gen_cntl;
 310         uint32_t crtc_ext_cntl;
 311         uint32_t fp2_gen_cntl;
 312         bool r;
 313
 314         seprom_cntl1 = RREG32(RADEON_SEPROM_CNTL1);
 315         viph_control = RREG32(RADEON_VIPH_CONTROL);
 316         bus_cntl = RREG32(RADEON_BUS_CNTL);
 317         crtc_gen_cntl = RREG32(RADEON_CRTC_GEN_CNTL);
 318         crtc2_gen_cntl = 0;
 319         crtc_ext_cntl = RREG32(RADEON_CRTC_EXT_CNTL);
 320         fp2_gen_cntl = 0;
 321
 322         if (rdev->ddev->pci_device == PCI_DEVICE_ID_ATI_RADEON_QY) {
 323                 fp2_gen_cntl = RREG32(RADEON_FP2_GEN_CNTL);
 324         }
 325
 326         if (!(rdev->flags & RADEON_SINGLE_CRTC)) {
 327                 crtc2_gen_cntl = RREG32(RADEON_CRTC2_GEN_CNTL);
 328         }
 329
 330         WREG32(RADEON_SEPROM_CNTL1,
 331                ((seprom_cntl1 & ~RADEON_SCK_PRESCALE_MASK) |
 332                 (0xc << RADEON_SCK_PRESCALE_SHIFT)));
 333
 334         /* disable VIP */
 335         WREG32(RADEON_VIPH_CONTROL, (viph_control & ~RADEON_VIPH_EN));
 336
 337         /* enable the rom */
 338         WREG32(RADEON_BUS_CNTL, (bus_cntl & ~RADEON_BUS_BIOS_DIS_ROM));
 339
 340         /* Turn off mem requests and CRTC for both controllers */
 341         WREG32(RADEON_CRTC_GEN_CNTL,
 342                ((crtc_gen_cntl & ~RADEON_CRTC_EN) |
 343                 (RADEON_CRTC_DISP_REQ_EN_B |
 344                  RADEON_CRTC_EXT_DISP_EN)));
 345         if (!(rdev->flags & RADEON_SINGLE_CRTC)) {
 346                 WREG32(RADEON_CRTC2_GEN_CNTL,
 347                        ((crtc2_gen_cntl & ~RADEON_CRTC2_EN) |
 348                         RADEON_CRTC2_DISP_REQ_EN_B));
 349         }
 350         /* Turn off CRTC */
 351         WREG32(RADEON_CRTC_EXT_CNTL,
 352                ((crtc_ext_cntl & ~RADEON_CRTC_CRT_ON) |
 353                 (RADEON_CRTC_SYNC_TRISTAT |
 354                  RADEON_CRTC_DISPLAY_DIS)));
 355
 356         if (rdev->ddev->pci_device == PCI_DEVICE_ID_ATI_RADEON_QY) {
 357                 WREG32(RADEON_FP2_GEN_CNTL, (fp2_gen_cntl & ~RADEON_FP2_ON));
 358         }
 359
 360         r = radeon_read_bios(rdev);
 361
 362         /* restore regs */
 363         WREG32(RADEON_SEPROM_CNTL1, seprom_cntl1);
 364         WREG32(RADEON_VIPH_CONTROL, viph_control);
 365         WREG32(RADEON_BUS_CNTL, bus_cntl);
 366         WREG32(RADEON_CRTC_GEN_CNTL, crtc_gen_cntl);
 367         if (!(rdev->flags & RADEON_SINGLE_CRTC)) {
 368                 WREG32(RADEON_CRTC2_GEN_CNTL, crtc2_gen_cntl);
 369         }
 370         WREG32(RADEON_CRTC_EXT_CNTL, crtc_ext_cntl);
 371         if (rdev->ddev->pci_device == PCI_DEVICE_ID_ATI_RADEON_QY) {
 372                 WREG32(RADEON_FP2_GEN_CNTL, fp2_gen_cntl);
 373         }
 374         return r;
 375 }
 376
 377 static bool radeon_read_disabled_bios(struct radeon_device *rdev)
 378 {
 379         if (rdev->flags & RADEON_IS_IGP)
 380                 return igp_read_bios_from_vram(rdev);
 381         else if (rdev->family >= CHIP_RV770)
 382                 return r700_read_disabled_bios(rdev);
 383         else if (rdev->family >= CHIP_R600)
 384                 return r600_read_disabled_bios(rdev);
 385         else if (rdev->family >= CHIP_RS600)
 386                 return avivo_read_disabled_bios(rdev);
 387         else
 388                 return legacy_read_disabled_bios(rdev);
 389 }
 390
 391 bool radeon_get_bios(struct radeon_device *rdev)
 392 {
 393         bool r;
 394         uint16_t tmp;
 395
 396         if (rdev->flags & RADEON_IS_IGP) {
 397                 r = igp_read_bios_from_vram(rdev);
 398                 if (r == false)
 399                         r = radeon_read_bios(rdev);
 400         } else
 401                 r = radeon_read_bios(rdev);
 402         if (r == false) {
 403                 r = radeon_read_disabled_bios(rdev);
 404         }
 405         if (r == false || rdev->bios == NULL) {
 406                 DRM_ERROR("Unable to locate a BIOS ROM\n");
 407                 rdev->bios = NULL;
 408                 return false;
 409         }
 410         if (rdev->bios[0] != 0x55 || rdev->bios[1] != 0xaa) {
 411                 goto free_bios;
 412         }
 413
 414         rdev->bios_header_start = RBIOS16(0x48);
 415         if (!rdev->bios_header_start) {
 416                 goto free_bios;
 417         }
 418         tmp = rdev->bios_header_start + 4;
 419         if (!memcmp(rdev->bios + tmp, "ATOM", 4) ||
 420             !memcmp(rdev->bios + tmp, "MOTA", 4)) {
 421                 rdev->is_atom_bios = true;
 422         } else {
 423                 rdev->is_atom_bios = false;
 424         }
 425
 426         DRM_DEBUG("%sBIOS detected\n", rdev->is_atom_bios ? "ATOM" : "COM");
 427         return true;
 428 free_bios:
 429         kfree(rdev->bios);
 430         rdev->bios = NULL;
 431         return false;
 432 }