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