summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/tiny/cirrus.c
blob: 744a8e337e41e9f314fd82a18377cbdd73e4fe16 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright 2012-2019 Red Hat
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License version 2. See the file COPYING in the main
 * directory of this archive for more details.
 *
 * Authors: Matthew Garrett
 *	    Dave Airlie
 *	    Gerd Hoffmann
 *
 * Portions of this code derived from cirrusfb.c:
 * drivers/video/cirrusfb.c - driver for Cirrus Logic chipsets
 *
 * Copyright 1999-2001 Jeff Garzik <jgarzik@pobox.com>
 */

#include <linux/console.h>
#include <linux/module.h>
#include <linux/pci.h>

#include <video/cirrus.h>
#include <video/vga.h>

#include <drm/drm_atomic_helper.h>
#include <drm/drm_atomic_state_helper.h>
#include <drm/drm_connector.h>
#include <drm/drm_damage_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_file.h>
#include <drm/drm_format_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_shmem_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_managed.h>
#include <drm/drm_modeset_helper_vtables.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>

#define DRIVER_NAME "cirrus"
#define DRIVER_DESC "qemu cirrus vga"
#define DRIVER_DATE "2019"
#define DRIVER_MAJOR 2
#define DRIVER_MINOR 0

#define CIRRUS_MAX_PITCH (0x1FF << 3)      /* (4096 - 1) & ~111b bytes */
#define CIRRUS_VRAM_SIZE (4 * 1024 * 1024) /* 4 MB */

struct cirrus_device {
	struct drm_device	       dev;
	struct drm_simple_display_pipe pipe;
	struct drm_connector	       conn;
	unsigned int		       cpp;
	unsigned int		       pitch;
	void __iomem		       *vram;
	void __iomem		       *mmio;
};

#define to_cirrus(_dev) container_of(_dev, struct cirrus_device, dev)

/* ------------------------------------------------------------------ */
/*
 * The meat of this driver. The core passes us a mode and we have to program
 * it. The modesetting here is the bare minimum required to satisfy the qemu
 * emulation of this hardware, and running this against a real device is
 * likely to result in an inadequately programmed mode. We've already had
 * the opportunity to modify the mode, so whatever we receive here should
 * be something that can be correctly programmed and displayed
 */

#define SEQ_INDEX 4
#define SEQ_DATA 5

static u8 rreg_seq(struct cirrus_device *cirrus, u8 reg)
{
	iowrite8(reg, cirrus->mmio + SEQ_INDEX);
	return ioread8(cirrus->mmio + SEQ_DATA);
}

static void wreg_seq(struct cirrus_device *cirrus, u8 reg, u8 val)
{
	iowrite8(reg, cirrus->mmio + SEQ_INDEX);
	iowrite8(val, cirrus->mmio + SEQ_DATA);
}

#define CRT_INDEX 0x14
#define CRT_DATA 0x15

static u8 rreg_crt(struct cirrus_device *cirrus, u8 reg)
{
	iowrite8(reg, cirrus->mmio + CRT_INDEX);
	return ioread8(cirrus->mmio + CRT_DATA);
}

static void wreg_crt(struct cirrus_device *cirrus, u8 reg, u8 val)
{
	iowrite8(reg, cirrus->mmio + CRT_INDEX);
	iowrite8(val, cirrus->mmio + CRT_DATA);
}

#define GFX_INDEX 0xe
#define GFX_DATA 0xf

static void wreg_gfx(struct cirrus_device *cirrus, u8 reg, u8 val)
{
	iowrite8(reg, cirrus->mmio + GFX_INDEX);
	iowrite8(val, cirrus->mmio + GFX_DATA);
}

#define VGA_DAC_MASK  0x06

static void wreg_hdr(struct cirrus_device *cirrus, u8 val)
{
	ioread8(cirrus->mmio + VGA_DAC_MASK);
	ioread8(cirrus->mmio + VGA_DAC_MASK);
	ioread8(cirrus->mmio + VGA_DAC_MASK);
	ioread8(cirrus->mmio + VGA_DAC_MASK);
	iowrite8(val, cirrus->mmio + VGA_DAC_MASK);
}

static int cirrus_convert_to(struct drm_framebuffer *fb)
{
	if (fb->format->cpp[0] == 4 && fb->pitches[0] > CIRRUS_MAX_PITCH) {
		if (fb->width * 3 <= CIRRUS_MAX_PITCH)
			/* convert from XR24 to RG24 */
			return 3;
		else
			/* convert from XR24 to RG16 */
			return 2;
	}
	return 0;
}

static int cirrus_cpp(struct drm_framebuffer *fb)
{
	int convert_cpp = cirrus_convert_to(fb);

	if (convert_cpp)
		return convert_cpp;
	return fb->format->cpp[0];
}

static int cirrus_pitch(struct drm_framebuffer *fb)
{
	int convert_cpp = cirrus_convert_to(fb);

	if (convert_cpp)
		return convert_cpp * fb->width;
	return fb->pitches[0];
}

static void cirrus_set_start_address(struct cirrus_device *cirrus, u32 offset)
{
	int idx;
	u32 addr;
	u8 tmp;

	if (!drm_dev_enter(&cirrus->dev, &idx))
		return;

	addr = offset >> 2;
	wreg_crt(cirrus, 0x0c, (u8)((addr >> 8) & 0xff));
	wreg_crt(cirrus, 0x0d, (u8)(addr & 0xff));

	tmp = rreg_crt(cirrus, 0x1b);
	tmp &= 0xf2;
	tmp |= (addr >> 16) & 0x01;
	tmp |= (addr >> 15) & 0x0c;
	wreg_crt(cirrus, 0x1b, tmp);

	tmp = rreg_crt(cirrus, 0x1d);
	tmp &= 0x7f;
	tmp |= (addr >> 12) & 0x80;
	wreg_crt(cirrus, 0x1d, tmp);

	drm_dev_exit(idx);
}

static int cirrus_mode_set(struct cirrus_device *cirrus,
			   struct drm_display_mode *mode,
			   struct drm_framebuffer *fb)
{
	int hsyncstart, hsyncend, htotal, hdispend;
	int vtotal, vdispend;
	int tmp, idx;
	int sr07 = 0, hdr = 0;

	if (!drm_dev_enter(&cirrus->dev, &idx))
		return -1;

	htotal = mode->htotal / 8;
	hsyncend = mode->hsync_end / 8;
	hsyncstart = mode->hsync_start / 8;
	hdispend = mode->hdisplay / 8;

	vtotal = mode->vtotal;
	vdispend = mode->vdisplay;

	vdispend -= 1;
	vtotal -= 2;

	htotal -= 5;
	hdispend -= 1;
	hsyncstart += 1;
	hsyncend += 1;

	wreg_crt(cirrus, VGA_CRTC_V_SYNC_END, 0x20);
	wreg_crt(cirrus, VGA_CRTC_H_TOTAL, htotal);
	wreg_crt(cirrus, VGA_CRTC_H_DISP, hdispend);
	wreg_crt(cirrus, VGA_CRTC_H_SYNC_START, hsyncstart);
	wreg_crt(cirrus, VGA_CRTC_H_SYNC_END, hsyncend);
	wreg_crt(cirrus, VGA_CRTC_V_TOTAL, vtotal & 0xff);
	wreg_crt(cirrus, VGA_CRTC_V_DISP_END, vdispend & 0xff);

	tmp = 0x40;
	if ((vdispend + 1) & 512)
		tmp |= 0x20;
	wreg_crt(cirrus, VGA_CRTC_MAX_SCAN, tmp);

	/*
	 * Overflow bits for values that don't fit in the standard registers
	 */
	tmp = 0x10;
	if (vtotal & 0x100)
		tmp |= 0x01;
	if (vdispend & 0x100)
		tmp |= 0x02;
	if ((vdispend + 1) & 0x100)
		tmp |= 0x08;
	if (vtotal & 0x200)
		tmp |= 0x20;
	if (vdispend & 0x200)
		tmp |= 0x40;
	wreg_crt(cirrus, VGA_CRTC_OVERFLOW, tmp);

	tmp = 0;

	/* More overflow bits */

	if ((htotal + 5) & 0x40)
		tmp |= 0x10;
	if ((htotal + 5) & 0x80)
		tmp |= 0x20;
	if (vtotal & 0x100)
		tmp |= 0x40;
	if (vtotal & 0x200)
		tmp |= 0x80;

	wreg_crt(cirrus, CL_CRT1A, tmp);

	/* Disable Hercules/CGA compatibility */
	wreg_crt(cirrus, VGA_CRTC_MODE, 0x03);

	sr07 = rreg_seq(cirrus, 0x07);
	sr07 &= 0xe0;
	hdr = 0;

	cirrus->cpp = cirrus_cpp(fb);
	switch (cirrus->cpp * 8) {
	case 8:
		sr07 |= 0x11;
		break;
	case 16:
		sr07 |= 0x17;
		hdr = 0xc1;
		break;
	case 24:
		sr07 |= 0x15;
		hdr = 0xc5;
		break;
	case 32:
		sr07 |= 0x19;
		hdr = 0xc5;
		break;
	default:
		drm_dev_exit(idx);
		return -1;
	}

	wreg_seq(cirrus, 0x7, sr07);

	/* Program the pitch */
	cirrus->pitch = cirrus_pitch(fb);
	tmp = cirrus->pitch / 8;
	wreg_crt(cirrus, VGA_CRTC_OFFSET, tmp);

	/* Enable extended blanking and pitch bits, and enable full memory */
	tmp = 0x22;
	tmp |= (cirrus->pitch >> 7) & 0x10;
	tmp |= (cirrus->pitch >> 6) & 0x40;
	wreg_crt(cirrus, 0x1b, tmp);

	/* Enable high-colour modes */
	wreg_gfx(cirrus, VGA_GFX_MODE, 0x40);

	/* And set graphics mode */
	wreg_gfx(cirrus, VGA_GFX_MISC, 0x01);

	wreg_hdr(cirrus, hdr);

	cirrus_set_start_address(cirrus, 0);

	/* Unblank (needed on S3 resume, vgabios doesn't do it then) */
	outb(0x20, 0x3c0);

	drm_dev_exit(idx);
	return 0;
}

static int cirrus_fb_blit_rect(struct drm_framebuffer *fb,
			       struct drm_rect *rect)
{
	struct cirrus_device *cirrus = to_cirrus(fb->dev);
	void *vmap;
	int idx, ret;

	ret = -ENODEV;
	if (!drm_dev_enter(&cirrus->dev, &idx))
		goto out;

	ret = -ENOMEM;
	vmap = drm_gem_shmem_vmap(fb->obj[0]);
	if (!vmap)
		goto out_dev_exit;

	if (cirrus->cpp == fb->format->cpp[0])
		drm_fb_memcpy_dstclip(cirrus->vram,
				      vmap, fb, rect);

	else if (fb->format->cpp[0] == 4 && cirrus->cpp == 2)
		drm_fb_xrgb8888_to_rgb565_dstclip(cirrus->vram,
						  cirrus->pitch,
						  vmap, fb, rect, false);

	else if (fb->format->cpp[0] == 4 && cirrus->cpp == 3)
		drm_fb_xrgb8888_to_rgb888_dstclip(cirrus->vram,
						  cirrus->pitch,
						  vmap, fb, rect);

	else
		WARN_ON_ONCE("cpp mismatch");

	drm_gem_shmem_vunmap(fb->obj[0], vmap);
	ret = 0;

out_dev_exit:
	drm_dev_exit(idx);
out:
	return ret;
}

static int cirrus_fb_blit_fullscreen(struct drm_framebuffer *fb)
{
	struct drm_rect fullscreen = {
		.x1 = 0,
		.x2 = fb->width,
		.y1 = 0,
		.y2 = fb->height,
	};
	return cirrus_fb_blit_rect(fb, &fullscreen);
}

static int cirrus_check_size(int width, int height,
			     struct drm_framebuffer *fb)
{
	int pitch = width * 2;

	if (fb)
		pitch = cirrus_pitch(fb);

	if (pitch > CIRRUS_MAX_PITCH)
		return -EINVAL;
	if (pitch * height > CIRRUS_VRAM_SIZE)
		return -EINVAL;
	return 0;
}

/* ------------------------------------------------------------------ */
/* cirrus connector						      */

static int cirrus_conn_get_modes(struct drm_connector *conn)
{
	int count;

	count = drm_add_modes_noedid(conn,
				     conn->dev->mode_config.max_width,
				     conn->dev->mode_config.max_height);
	drm_set_preferred_mode(conn, 1024, 768);
	return count;
}

static const struct drm_connector_helper_funcs cirrus_conn_helper_funcs = {
	.get_modes = cirrus_conn_get_modes,
};

static const struct drm_connector_funcs cirrus_conn_funcs = {
	.fill_modes = drm_helper_probe_single_connector_modes,
	.destroy = drm_connector_cleanup,
	.reset = drm_atomic_helper_connector_reset,
	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};

static int cirrus_conn_init(struct cirrus_device *cirrus)
{
	drm_connector_helper_add(&cirrus->conn, &cirrus_conn_helper_funcs);
	return drm_connector_init(&cirrus->dev, &cirrus->conn,
				  &cirrus_conn_funcs, DRM_MODE_CONNECTOR_VGA);

}

/* ------------------------------------------------------------------ */
/* cirrus (simple) display pipe					      */

static enum drm_mode_status cirrus_pipe_mode_valid(struct drm_simple_display_pipe *pipe,
						   const struct drm_display_mode *mode)
{
	if (cirrus_check_size(mode->hdisplay, mode->vdisplay, NULL) < 0)
		return MODE_BAD;
	return MODE_OK;
}

static int cirrus_pipe_check(struct drm_simple_display_pipe *pipe,
			     struct drm_plane_state *plane_state,
			     struct drm_crtc_state *crtc_state)
{
	struct drm_framebuffer *fb = plane_state->fb;

	if (!fb)
		return 0;
	return cirrus_check_size(fb->width, fb->height, fb);
}

static void cirrus_pipe_enable(struct drm_simple_display_pipe *pipe,
			       struct drm_crtc_state *crtc_state,
			       struct drm_plane_state *plane_state)
{
	struct cirrus_device *cirrus = to_cirrus(pipe->crtc.dev);

	cirrus_mode_set(cirrus, &crtc_state->mode, plane_state->fb);
	cirrus_fb_blit_fullscreen(plane_state->fb);
}

static void cirrus_pipe_update(struct drm_simple_display_pipe *pipe,
			       struct drm_plane_state *old_state)
{
	struct cirrus_device *cirrus = to_cirrus(pipe->crtc.dev);
	struct drm_plane_state *state = pipe->plane.state;
	struct drm_crtc *crtc = &pipe->crtc;
	struct drm_rect rect;

	if (pipe->plane.state->fb &&
	    cirrus->cpp != cirrus_cpp(pipe->plane.state->fb))
		cirrus_mode_set(cirrus, &crtc->mode,
				pipe->plane.state->fb);

	if (drm_atomic_helper_damage_merged(old_state, state, &rect))
		cirrus_fb_blit_rect(pipe->plane.state->fb, &rect);
}

static const struct drm_simple_display_pipe_funcs cirrus_pipe_funcs = {
	.mode_valid = cirrus_pipe_mode_valid,
	.check	    = cirrus_pipe_check,
	.enable	    = cirrus_pipe_enable,
	.update	    = cirrus_pipe_update,
};

static const uint32_t cirrus_formats[] = {
	DRM_FORMAT_RGB565,
	DRM_FORMAT_RGB888,
	DRM_FORMAT_XRGB8888,
};

static const uint64_t cirrus_modifiers[] = {
	DRM_FORMAT_MOD_LINEAR,
	DRM_FORMAT_MOD_INVALID
};

static int cirrus_pipe_init(struct cirrus_device *cirrus)
{
	return drm_simple_display_pipe_init(&cirrus->dev,
					    &cirrus->pipe,
					    &cirrus_pipe_funcs,
					    cirrus_formats,
					    ARRAY_SIZE(cirrus_formats),
					    cirrus_modifiers,
					    &cirrus->conn);
}

/* ------------------------------------------------------------------ */
/* cirrus framebuffers & mode config				      */

static struct drm_framebuffer*
cirrus_fb_create(struct drm_device *dev, struct drm_file *file_priv,
		 const struct drm_mode_fb_cmd2 *mode_cmd)
{
	if (mode_cmd->pixel_format != DRM_FORMAT_RGB565 &&
	    mode_cmd->pixel_format != DRM_FORMAT_RGB888 &&
	    mode_cmd->pixel_format != DRM_FORMAT_XRGB8888)
		return ERR_PTR(-EINVAL);
	if (cirrus_check_size(mode_cmd->width, mode_cmd->height, NULL) < 0)
		return ERR_PTR(-EINVAL);
	return drm_gem_fb_create_with_dirty(dev, file_priv, mode_cmd);
}

static const struct drm_mode_config_funcs cirrus_mode_config_funcs = {
	.fb_create = cirrus_fb_create,
	.atomic_check = drm_atomic_helper_check,
	.atomic_commit = drm_atomic_helper_commit,
};

static int cirrus_mode_config_init(struct cirrus_device *cirrus)
{
	struct drm_device *dev = &cirrus->dev;
	int ret;

	ret = drmm_mode_config_init(dev);
	if (ret)
		return ret;

	dev->mode_config.min_width = 0;
	dev->mode_config.min_height = 0;
	dev->mode_config.max_width = CIRRUS_MAX_PITCH / 2;
	dev->mode_config.max_height = 1024;
	dev->mode_config.preferred_depth = 16;
	dev->mode_config.prefer_shadow = 0;
	dev->mode_config.funcs = &cirrus_mode_config_funcs;

	return 0;
}

/* ------------------------------------------------------------------ */

DEFINE_DRM_GEM_FOPS(cirrus_fops);

static struct drm_driver cirrus_driver = {
	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,

	.name		 = DRIVER_NAME,
	.desc		 = DRIVER_DESC,
	.date		 = DRIVER_DATE,
	.major		 = DRIVER_MAJOR,
	.minor		 = DRIVER_MINOR,

	.fops		 = &cirrus_fops,
	DRM_GEM_SHMEM_DRIVER_OPS,
};

static int cirrus_pci_probe(struct pci_dev *pdev,
			    const struct pci_device_id *ent)
{
	struct drm_device *dev;
	struct cirrus_device *cirrus;
	int ret;

	ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, "cirrusdrmfb");
	if (ret)
		return ret;

	ret = pcim_enable_device(pdev);
	if (ret)
		return ret;

	ret = pci_request_regions(pdev, DRIVER_NAME);
	if (ret)
		return ret;

	ret = -ENOMEM;
	cirrus = devm_drm_dev_alloc(&pdev->dev, &cirrus_driver,
				    struct cirrus_device, dev);
	if (IS_ERR(cirrus))
		return PTR_ERR(cirrus);

	dev = &cirrus->dev;

	cirrus->vram = devm_ioremap(&pdev->dev, pci_resource_start(pdev, 0),
				    pci_resource_len(pdev, 0));
	if (cirrus->vram == NULL)
		return -ENOMEM;

	cirrus->mmio = devm_ioremap(&pdev->dev, pci_resource_start(pdev, 1),
				    pci_resource_len(pdev, 1));
	if (cirrus->mmio == NULL)
		return -ENOMEM;

	ret = cirrus_mode_config_init(cirrus);
	if (ret)
		return ret;

	ret = cirrus_conn_init(cirrus);
	if (ret < 0)
		return ret;

	ret = cirrus_pipe_init(cirrus);
	if (ret < 0)
		return ret;

	drm_mode_config_reset(dev);

	dev->pdev = pdev;
	pci_set_drvdata(pdev, dev);
	ret = drm_dev_register(dev, 0);
	if (ret)
		return ret;

	drm_fbdev_generic_setup(dev, dev->mode_config.preferred_depth);
	return 0;
}

static void cirrus_pci_remove(struct pci_dev *pdev)
{
	struct drm_device *dev = pci_get_drvdata(pdev);

	drm_dev_unplug(dev);
	drm_atomic_helper_shutdown(dev);
}

static const struct pci_device_id pciidlist[] = {
	{
		.vendor    = PCI_VENDOR_ID_CIRRUS,
		.device    = PCI_DEVICE_ID_CIRRUS_5446,
		/* only bind to the cirrus chip in qemu */
		.subvendor = PCI_SUBVENDOR_ID_REDHAT_QUMRANET,
		.subdevice = PCI_SUBDEVICE_ID_QEMU,
	}, {
		.vendor    = PCI_VENDOR_ID_CIRRUS,
		.device    = PCI_DEVICE_ID_CIRRUS_5446,
		.subvendor = PCI_VENDOR_ID_XEN,
		.subdevice = 0x0001,
	},
	{ /* end if list */ }
};

static struct pci_driver cirrus_pci_driver = {
	.name = DRIVER_NAME,
	.id_table = pciidlist,
	.probe = cirrus_pci_probe,
	.remove = cirrus_pci_remove,
};

static int __init cirrus_init(void)
{
	if (vgacon_text_force())
		return -EINVAL;
	return pci_register_driver(&cirrus_pci_driver);
}

static void __exit cirrus_exit(void)
{
	pci_unregister_driver(&cirrus_pci_driver);
}

module_init(cirrus_init);
module_exit(cirrus_exit);

MODULE_DEVICE_TABLE(pci, pciidlist);
MODULE_LICENSE("GPL");