drivers/gpu/drm/tiny/cirrus.c

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright 2012-2019 Red Hat
   4  *
   5  * This file is subject to the terms and conditions of the GNU General
   6  * Public License version 2. See the file COPYING in the main
   7  * directory of this archive for more details.
   8  *
   9  * Authors: Matthew Garrett
  10  *          Dave Airlie
  11  *          Gerd Hoffmann
  12  *
  13  * Portions of this code derived from cirrusfb.c:
  14  * drivers/video/cirrusfb.c - driver for Cirrus Logic chipsets
  15  *
  16  * Copyright 1999-2001 Jeff Garzik <jgarzik@pobox.com>
  17  */
  18
  19 #include <linux/console.h>
  20 #include <linux/module.h>
  21 #include <linux/pci.h>
  22
  23 #include <video/cirrus.h>
  24 #include <video/vga.h>
  25
  26 #include <drm/drm_atomic_helper.h>
  27 #include <drm/drm_atomic_state_helper.h>
  28 #include <drm/drm_connector.h>
  29 #include <drm/drm_damage_helper.h>
  30 #include <drm/drm_drv.h>
  31 #include <drm/drm_fb_helper.h>
  32 #include <drm/drm_file.h>
  33 #include <drm/drm_format_helper.h>
  34 #include <drm/drm_fourcc.h>
  35 #include <drm/drm_gem_shmem_helper.h>
  36 #include <drm/drm_gem_framebuffer_helper.h>
  37 #include <drm/drm_ioctl.h>
  38 #include <drm/drm_managed.h>
  39 #include <drm/drm_modeset_helper_vtables.h>
  40 #include <drm/drm_probe_helper.h>
  41 #include <drm/drm_simple_kms_helper.h>
  42
  43 #define DRIVER_NAME "cirrus"
  44 #define DRIVER_DESC "qemu cirrus vga"
  45 #define DRIVER_DATE "2019"
  46 #define DRIVER_MAJOR 2
  47 #define DRIVER_MINOR 0
  48
  49 #define CIRRUS_MAX_PITCH (0x1FF << 3)      /* (4096 - 1) & ~111b bytes */
  50 #define CIRRUS_VRAM_SIZE (4 * 1024 * 1024) /* 4 MB */
  51
  52 struct cirrus_device {
  53         struct drm_device              dev;
  54         struct drm_simple_display_pipe pipe;
  55         struct drm_connector           conn;
  56         unsigned int                   cpp;
  57         unsigned int                   pitch;
  58         void __iomem                   *vram;
  59         void __iomem                   *mmio;
  60 };
  61
  62 #define to_cirrus(_dev) container_of(_dev, struct cirrus_device, dev)
  63
  64 /* ------------------------------------------------------------------ */
  65 /*
  66  * The meat of this driver. The core passes us a mode and we have to program
  67  * it. The modesetting here is the bare minimum required to satisfy the qemu
  68  * emulation of this hardware, and running this against a real device is
  69  * likely to result in an inadequately programmed mode. We've already had
  70  * the opportunity to modify the mode, so whatever we receive here should
  71  * be something that can be correctly programmed and displayed
  72  */
  73
  74 #define SEQ_INDEX 4
  75 #define SEQ_DATA 5
  76
  77 static u8 rreg_seq(struct cirrus_device *cirrus, u8 reg)
  78 {
  79         iowrite8(reg, cirrus->mmio + SEQ_INDEX);
  80         return ioread8(cirrus->mmio + SEQ_DATA);
  81 }
  82
  83 static void wreg_seq(struct cirrus_device *cirrus, u8 reg, u8 val)
  84 {
  85         iowrite8(reg, cirrus->mmio + SEQ_INDEX);
  86         iowrite8(val, cirrus->mmio + SEQ_DATA);
  87 }
  88
  89 #define CRT_INDEX 0x14
  90 #define CRT_DATA 0x15
  91
  92 static u8 rreg_crt(struct cirrus_device *cirrus, u8 reg)
  93 {
  94         iowrite8(reg, cirrus->mmio + CRT_INDEX);
  95         return ioread8(cirrus->mmio + CRT_DATA);
  96 }
  97
  98 static void wreg_crt(struct cirrus_device *cirrus, u8 reg, u8 val)
  99 {
 100         iowrite8(reg, cirrus->mmio + CRT_INDEX);
 101         iowrite8(val, cirrus->mmio + CRT_DATA);
 102 }
 103
 104 #define GFX_INDEX 0xe
 105 #define GFX_DATA 0xf
 106
 107 static void wreg_gfx(struct cirrus_device *cirrus, u8 reg, u8 val)
 108 {
 109         iowrite8(reg, cirrus->mmio + GFX_INDEX);
 110         iowrite8(val, cirrus->mmio + GFX_DATA);
 111 }
 112
 113 #define VGA_DAC_MASK  0x06
 114
 115 static void wreg_hdr(struct cirrus_device *cirrus, u8 val)
 116 {
 117         ioread8(cirrus->mmio + VGA_DAC_MASK);
 118         ioread8(cirrus->mmio + VGA_DAC_MASK);
 119         ioread8(cirrus->mmio + VGA_DAC_MASK);
 120         ioread8(cirrus->mmio + VGA_DAC_MASK);
 121         iowrite8(val, cirrus->mmio + VGA_DAC_MASK);
 122 }
 123
 124 static int cirrus_convert_to(struct drm_framebuffer *fb)
 125 {
 126         if (fb->format->cpp[0] == 4 && fb->pitches[0] > CIRRUS_MAX_PITCH) {
 127                 if (fb->width * 3 <= CIRRUS_MAX_PITCH)
 128                         /* convert from XR24 to RG24 */
 129                         return 3;
 130                 else
 131                         /* convert from XR24 to RG16 */
 132                         return 2;
 133         }
 134         return 0;
 135 }
 136
 137 static int cirrus_cpp(struct drm_framebuffer *fb)
 138 {
 139         int convert_cpp = cirrus_convert_to(fb);
 140
 141         if (convert_cpp)
 142                 return convert_cpp;
 143         return fb->format->cpp[0];
 144 }
 145
 146 static int cirrus_pitch(struct drm_framebuffer *fb)
 147 {
 148         int convert_cpp = cirrus_convert_to(fb);
 149
 150         if (convert_cpp)
 151                 return convert_cpp * fb->width;
 152         return fb->pitches[0];
 153 }
 154
 155 static void cirrus_set_start_address(struct cirrus_device *cirrus, u32 offset)
 156 {
 157         int idx;
 158         u32 addr;
 159         u8 tmp;
 160
 161         if (!drm_dev_enter(&cirrus->dev, &idx))
 162                 return;
 163
 164         addr = offset >> 2;
 165         wreg_crt(cirrus, 0x0c, (u8)((addr >> 8) & 0xff));
 166         wreg_crt(cirrus, 0x0d, (u8)(addr & 0xff));
 167
 168         tmp = rreg_crt(cirrus, 0x1b);
 169         tmp &= 0xf2;
 170         tmp |= (addr >> 16) & 0x01;
 171         tmp |= (addr >> 15) & 0x0c;
 172         wreg_crt(cirrus, 0x1b, tmp);
 173
 174         tmp = rreg_crt(cirrus, 0x1d);
 175         tmp &= 0x7f;
 176         tmp |= (addr >> 12) & 0x80;
 177         wreg_crt(cirrus, 0x1d, tmp);
 178
 179         drm_dev_exit(idx);
 180 }
 181
 182 static int cirrus_mode_set(struct cirrus_device *cirrus,
 183                            struct drm_display_mode *mode,
 184                            struct drm_framebuffer *fb)
 185 {
 186         int hsyncstart, hsyncend, htotal, hdispend;
 187         int vtotal, vdispend;
 188         int tmp, idx;
 189         int sr07 = 0, hdr = 0;
 190
 191         if (!drm_dev_enter(&cirrus->dev, &idx))
 192                 return -1;
 193
 194         htotal = mode->htotal / 8;
 195         hsyncend = mode->hsync_end / 8;
 196         hsyncstart = mode->hsync_start / 8;
 197         hdispend = mode->hdisplay / 8;
 198
 199         vtotal = mode->vtotal;
 200         vdispend = mode->vdisplay;
 201
 202         vdispend -= 1;
 203         vtotal -= 2;
 204
 205         htotal -= 5;
 206         hdispend -= 1;
 207         hsyncstart += 1;
 208         hsyncend += 1;
 209
 210         wreg_crt(cirrus, VGA_CRTC_V_SYNC_END, 0x20);
 211         wreg_crt(cirrus, VGA_CRTC_H_TOTAL, htotal);
 212         wreg_crt(cirrus, VGA_CRTC_H_DISP, hdispend);
 213         wreg_crt(cirrus, VGA_CRTC_H_SYNC_START, hsyncstart);
 214         wreg_crt(cirrus, VGA_CRTC_H_SYNC_END, hsyncend);
 215         wreg_crt(cirrus, VGA_CRTC_V_TOTAL, vtotal & 0xff);
 216         wreg_crt(cirrus, VGA_CRTC_V_DISP_END, vdispend & 0xff);
 217
 218         tmp = 0x40;
 219         if ((vdispend + 1) & 512)
 220                 tmp |= 0x20;
 221         wreg_crt(cirrus, VGA_CRTC_MAX_SCAN, tmp);
 222
 223         /*
 224          * Overflow bits for values that don't fit in the standard registers
 225          */
 226         tmp = 0x10;
 227         if (vtotal & 0x100)
 228                 tmp |= 0x01;
 229         if (vdispend & 0x100)
 230                 tmp |= 0x02;
 231         if ((vdispend + 1) & 0x100)
 232                 tmp |= 0x08;
 233         if (vtotal & 0x200)
 234                 tmp |= 0x20;
 235         if (vdispend & 0x200)
 236                 tmp |= 0x40;
 237         wreg_crt(cirrus, VGA_CRTC_OVERFLOW, tmp);
 238
 239         tmp = 0;
 240
 241         /* More overflow bits */
 242
 243         if ((htotal + 5) & 0x40)
 244                 tmp |= 0x10;
 245         if ((htotal + 5) & 0x80)
 246                 tmp |= 0x20;
 247         if (vtotal & 0x100)
 248                 tmp |= 0x40;
 249         if (vtotal & 0x200)
 250                 tmp |= 0x80;
 251
 252         wreg_crt(cirrus, CL_CRT1A, tmp);
 253
 254         /* Disable Hercules/CGA compatibility */
 255         wreg_crt(cirrus, VGA_CRTC_MODE, 0x03);
 256
 257         sr07 = rreg_seq(cirrus, 0x07);
 258         sr07 &= 0xe0;
 259         hdr = 0;
 260
 261         cirrus->cpp = cirrus_cpp(fb);
 262         switch (cirrus->cpp * 8) {
 263         case 8:
 264                 sr07 |= 0x11;
 265                 break;
 266         case 16:
 267                 sr07 |= 0x17;
 268                 hdr = 0xc1;
 269                 break;
 270         case 24:
 271                 sr07 |= 0x15;
 272                 hdr = 0xc5;
 273                 break;
 274         case 32:
 275                 sr07 |= 0x19;
 276                 hdr = 0xc5;
 277                 break;
 278         default:
 279                 drm_dev_exit(idx);
 280                 return -1;
 281         }
 282
 283         wreg_seq(cirrus, 0x7, sr07);
 284
 285         /* Program the pitch */
 286         cirrus->pitch = cirrus_pitch(fb);
 287         tmp = cirrus->pitch / 8;
 288         wreg_crt(cirrus, VGA_CRTC_OFFSET, tmp);
 289
 290         /* Enable extended blanking and pitch bits, and enable full memory */
 291         tmp = 0x22;
 292         tmp |= (cirrus->pitch >> 7) & 0x10;
 293         tmp |= (cirrus->pitch >> 6) & 0x40;
 294         wreg_crt(cirrus, 0x1b, tmp);
 295
 296         /* Enable high-colour modes */
 297         wreg_gfx(cirrus, VGA_GFX_MODE, 0x40);
 298
 299         /* And set graphics mode */
 300         wreg_gfx(cirrus, VGA_GFX_MISC, 0x01);
 301
 302         wreg_hdr(cirrus, hdr);
 303
 304         cirrus_set_start_address(cirrus, 0);
 305
 306         /* Unblank (needed on S3 resume, vgabios doesn't do it then) */
 307         outb(0x20, 0x3c0);
 308
 309         drm_dev_exit(idx);
 310         return 0;
 311 }
 312
 313 static int cirrus_fb_blit_rect(struct drm_framebuffer *fb,
 314                                struct drm_rect *rect)
 315 {
 316         struct cirrus_device *cirrus = to_cirrus(fb->dev);
 317         void *vmap;
 318         int idx, ret;
 319
 320         ret = -ENODEV;
 321         if (!drm_dev_enter(&cirrus->dev, &idx))
 322                 goto out;
 323
 324         ret = -ENOMEM;
 325         vmap = drm_gem_shmem_vmap(fb->obj[0]);
 326         if (!vmap)
 327                 goto out_dev_exit;
 328
 329         if (cirrus->cpp == fb->format->cpp[0])
 330                 drm_fb_memcpy_dstclip(cirrus->vram,
 331                                       vmap, fb, rect);
 332
 333         else if (fb->format->cpp[0] == 4 && cirrus->cpp == 2)
 334                 drm_fb_xrgb8888_to_rgb565_dstclip(cirrus->vram,
 335                                                   cirrus->pitch,
 336                                                   vmap, fb, rect, false);
 337
 338         else if (fb->format->cpp[0] == 4 && cirrus->cpp == 3)
 339                 drm_fb_xrgb8888_to_rgb888_dstclip(cirrus->vram,
 340                                                   cirrus->pitch,
 341                                                   vmap, fb, rect);
 342
 343         else
 344                 WARN_ON_ONCE("cpp mismatch");
 345
 346         drm_gem_shmem_vunmap(fb->obj[0], vmap);
 347         ret = 0;
 348
 349 out_dev_exit:
 350         drm_dev_exit(idx);
 351 out:
 352         return ret;
 353 }
 354
 355 static int cirrus_fb_blit_fullscreen(struct drm_framebuffer *fb)
 356 {
 357         struct drm_rect fullscreen = {
 358                 .x1 = 0,
 359                 .x2 = fb->width,
 360                 .y1 = 0,
 361                 .y2 = fb->height,
 362         };
 363         return cirrus_fb_blit_rect(fb, &fullscreen);
 364 }
 365
 366 static int cirrus_check_size(int width, int height,
 367                              struct drm_framebuffer *fb)
 368 {
 369         int pitch = width * 2;
 370
 371         if (fb)
 372                 pitch = cirrus_pitch(fb);
 373
 374         if (pitch > CIRRUS_MAX_PITCH)
 375                 return -EINVAL;
 376         if (pitch * height > CIRRUS_VRAM_SIZE)
 377                 return -EINVAL;
 378         return 0;
 379 }
 380
 381 /* ------------------------------------------------------------------ */
 382 /* cirrus connector                                                   */
 383
 384 static int cirrus_conn_get_modes(struct drm_connector *conn)
 385 {
 386         int count;
 387
 388         count = drm_add_modes_noedid(conn,
 389                                      conn->dev->mode_config.max_width,
 390                                      conn->dev->mode_config.max_height);
 391         drm_set_preferred_mode(conn, 1024, 768);
 392         return count;
 393 }
 394
 395 static const struct drm_connector_helper_funcs cirrus_conn_helper_funcs = {
 396         .get_modes = cirrus_conn_get_modes,
 397 };
 398
 399 static const struct drm_connector_funcs cirrus_conn_funcs = {
 400         .fill_modes = drm_helper_probe_single_connector_modes,
 401         .destroy = drm_connector_cleanup,
 402         .reset = drm_atomic_helper_connector_reset,
 403         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 404         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 405 };
 406
 407 static int cirrus_conn_init(struct cirrus_device *cirrus)
 408 {
 409         drm_connector_helper_add(&cirrus->conn, &cirrus_conn_helper_funcs);
 410         return drm_connector_init(&cirrus->dev, &cirrus->conn,
 411                                   &cirrus_conn_funcs, DRM_MODE_CONNECTOR_VGA);
 412
 413 }
 414
 415 /* ------------------------------------------------------------------ */
 416 /* cirrus (simple) display pipe                                       */
 417
 418 static enum drm_mode_status cirrus_pipe_mode_valid(struct drm_simple_display_pipe *pipe,
 419                                                    const struct drm_display_mode *mode)
 420 {
 421         if (cirrus_check_size(mode->hdisplay, mode->vdisplay, NULL) < 0)
 422                 return MODE_BAD;
 423         return MODE_OK;
 424 }
 425
 426 static int cirrus_pipe_check(struct drm_simple_display_pipe *pipe,
 427                              struct drm_plane_state *plane_state,
 428                              struct drm_crtc_state *crtc_state)
 429 {
 430         struct drm_framebuffer *fb = plane_state->fb;
 431
 432         if (!fb)
 433                 return 0;
 434         return cirrus_check_size(fb->width, fb->height, fb);
 435 }
 436
 437 static void cirrus_pipe_enable(struct drm_simple_display_pipe *pipe,
 438                                struct drm_crtc_state *crtc_state,
 439                                struct drm_plane_state *plane_state)
 440 {
 441         struct cirrus_device *cirrus = to_cirrus(pipe->crtc.dev);
 442
 443         cirrus_mode_set(cirrus, &crtc_state->mode, plane_state->fb);
 444         cirrus_fb_blit_fullscreen(plane_state->fb);
 445 }
 446
 447 static void cirrus_pipe_update(struct drm_simple_display_pipe *pipe,
 448                                struct drm_plane_state *old_state)
 449 {
 450         struct cirrus_device *cirrus = to_cirrus(pipe->crtc.dev);
 451         struct drm_plane_state *state = pipe->plane.state;
 452         struct drm_crtc *crtc = &pipe->crtc;
 453         struct drm_rect rect;
 454
 455         if (pipe->plane.state->fb &&
 456             cirrus->cpp != cirrus_cpp(pipe->plane.state->fb))
 457                 cirrus_mode_set(cirrus, &crtc->mode,
 458                                 pipe->plane.state->fb);
 459
 460         if (drm_atomic_helper_damage_merged(old_state, state, &rect))
 461                 cirrus_fb_blit_rect(pipe->plane.state->fb, &rect);
 462 }
 463
 464 static const struct drm_simple_display_pipe_funcs cirrus_pipe_funcs = {
 465         .mode_valid = cirrus_pipe_mode_valid,
 466         .check      = cirrus_pipe_check,
 467         .enable     = cirrus_pipe_enable,
 468         .update     = cirrus_pipe_update,
 469 };
 470
 471 static const uint32_t cirrus_formats[] = {
 472         DRM_FORMAT_RGB565,
 473         DRM_FORMAT_RGB888,
 474         DRM_FORMAT_XRGB8888,
 475 };
 476
 477 static const uint64_t cirrus_modifiers[] = {
 478         DRM_FORMAT_MOD_LINEAR,
 479         DRM_FORMAT_MOD_INVALID
 480 };
 481
 482 static int cirrus_pipe_init(struct cirrus_device *cirrus)
 483 {
 484         return drm_simple_display_pipe_init(&cirrus->dev,
 485                                             &cirrus->pipe,
 486                                             &cirrus_pipe_funcs,
 487                                             cirrus_formats,
 488                                             ARRAY_SIZE(cirrus_formats),
 489                                             cirrus_modifiers,
 490                                             &cirrus->conn);
 491 }
 492
 493 /* ------------------------------------------------------------------ */
 494 /* cirrus framebuffers & mode config                                  */
 495
 496 static struct drm_framebuffer*
 497 cirrus_fb_create(struct drm_device *dev, struct drm_file *file_priv,
 498                  const struct drm_mode_fb_cmd2 *mode_cmd)
 499 {
 500         if (mode_cmd->pixel_format != DRM_FORMAT_RGB565 &&
 501             mode_cmd->pixel_format != DRM_FORMAT_RGB888 &&
 502             mode_cmd->pixel_format != DRM_FORMAT_XRGB8888)
 503                 return ERR_PTR(-EINVAL);
 504         if (cirrus_check_size(mode_cmd->width, mode_cmd->height, NULL) < 0)
 505                 return ERR_PTR(-EINVAL);
 506         return drm_gem_fb_create_with_dirty(dev, file_priv, mode_cmd);
 507 }
 508
 509 static const struct drm_mode_config_funcs cirrus_mode_config_funcs = {
 510         .fb_create = cirrus_fb_create,
 511         .atomic_check = drm_atomic_helper_check,
 512         .atomic_commit = drm_atomic_helper_commit,
 513 };
 514
 515 static int cirrus_mode_config_init(struct cirrus_device *cirrus)
 516 {
 517         struct drm_device *dev = &cirrus->dev;
 518         int ret;
 519
 520         ret = drmm_mode_config_init(dev);
 521         if (ret)
 522                 return ret;
 523
 524         dev->mode_config.min_width = 0;
 525         dev->mode_config.min_height = 0;
 526         dev->mode_config.max_width = CIRRUS_MAX_PITCH / 2;
 527         dev->mode_config.max_height = 1024;
 528         dev->mode_config.preferred_depth = 16;
 529         dev->mode_config.prefer_shadow = 0;
 530         dev->mode_config.funcs = &cirrus_mode_config_funcs;
 531
 532         return 0;
 533 }
 534
 535 /* ------------------------------------------------------------------ */
 536
 537 DEFINE_DRM_GEM_FOPS(cirrus_fops);
 538
 539 static struct drm_driver cirrus_driver = {
 540         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
 541
 542         .name            = DRIVER_NAME,
 543         .desc            = DRIVER_DESC,
 544         .date            = DRIVER_DATE,
 545         .major           = DRIVER_MAJOR,
 546         .minor           = DRIVER_MINOR,
 547
 548         .fops            = &cirrus_fops,
 549         DRM_GEM_SHMEM_DRIVER_OPS,
 550 };
 551
 552 static int cirrus_pci_probe(struct pci_dev *pdev,
 553                             const struct pci_device_id *ent)
 554 {
 555         struct drm_device *dev;
 556         struct cirrus_device *cirrus;
 557         int ret;
 558
 559         ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, "cirrusdrmfb");
 560         if (ret)
 561                 return ret;
 562
 563         ret = pcim_enable_device(pdev);
 564         if (ret)
 565                 return ret;
 566
 567         ret = pci_request_regions(pdev, DRIVER_NAME);
 568         if (ret)
 569                 return ret;
 570
 571         ret = -ENOMEM;
 572         cirrus = devm_drm_dev_alloc(&pdev->dev, &cirrus_driver,
 573                                     struct cirrus_device, dev);
 574         if (IS_ERR(cirrus))
 575                 return PTR_ERR(cirrus);
 576
 577         dev = &cirrus->dev;
 578
 579         cirrus->vram = devm_ioremap(&pdev->dev, pci_resource_start(pdev, 0),
 580                                     pci_resource_len(pdev, 0));
 581         if (cirrus->vram == NULL)
 582                 return -ENOMEM;
 583
 584         cirrus->mmio = devm_ioremap(&pdev->dev, pci_resource_start(pdev, 1),
 585                                     pci_resource_len(pdev, 1));
 586         if (cirrus->mmio == NULL)
 587                 return -ENOMEM;
 588
 589         ret = cirrus_mode_config_init(cirrus);
 590         if (ret)
 591                 return ret;
 592
 593         ret = cirrus_conn_init(cirrus);
 594         if (ret < 0)
 595                 return ret;
 596
 597         ret = cirrus_pipe_init(cirrus);
 598         if (ret < 0)
 599                 return ret;
 600
 601         drm_mode_config_reset(dev);
 602
 603         dev->pdev = pdev;
 604         pci_set_drvdata(pdev, dev);
 605         ret = drm_dev_register(dev, 0);
 606         if (ret)
 607                 return ret;
 608
 609         drm_fbdev_generic_setup(dev, dev->mode_config.preferred_depth);
 610         return 0;
 611 }
 612
 613 static void cirrus_pci_remove(struct pci_dev *pdev)
 614 {
 615         struct drm_device *dev = pci_get_drvdata(pdev);
 616
 617         drm_dev_unplug(dev);
 618         drm_atomic_helper_shutdown(dev);
 619 }
 620
 621 static const struct pci_device_id pciidlist[] = {
 622         {
 623                 .vendor    = PCI_VENDOR_ID_CIRRUS,
 624                 .device    = PCI_DEVICE_ID_CIRRUS_5446,
 625                 /* only bind to the cirrus chip in qemu */
 626                 .subvendor = PCI_SUBVENDOR_ID_REDHAT_QUMRANET,
 627                 .subdevice = PCI_SUBDEVICE_ID_QEMU,
 628         }, {
 629                 .vendor    = PCI_VENDOR_ID_CIRRUS,
 630                 .device    = PCI_DEVICE_ID_CIRRUS_5446,
 631                 .subvendor = PCI_VENDOR_ID_XEN,
 632                 .subdevice = 0x0001,
 633         },
 634         { /* end if list */ }
 635 };
 636
 637 static struct pci_driver cirrus_pci_driver = {
 638         .name = DRIVER_NAME,
 639         .id_table = pciidlist,
 640         .probe = cirrus_pci_probe,
 641         .remove = cirrus_pci_remove,
 642 };
 643
 644 static int __init cirrus_init(void)
 645 {
 646         if (vgacon_text_force())
 647                 return -EINVAL;
 648         return pci_register_driver(&cirrus_pci_driver);
 649 }
 650
 651 static void __exit cirrus_exit(void)
 652 {
 653         pci_unregister_driver(&cirrus_pci_driver);
 654 }
 655
 656 module_init(cirrus_init);
 657 module_exit(cirrus_exit);
 658
 659 MODULE_DEVICE_TABLE(pci, pciidlist);
 660 MODULE_LICENSE("GPL");