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