summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/mgag200/mgag200_drv.c
blob: 976f0ab2006b5a23533b7e9b42119db91b0ceb0f (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
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright 2012 Red Hat
 *
 * Authors: Matthew Garrett
 *          Dave Airlie
 */

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

#include <drm/drm_aperture.h>
#include <drm/drm_drv.h>
#include <drm/drm_fbdev_generic.h>
#include <drm/drm_file.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_managed.h>
#include <drm/drm_module.h>
#include <drm/drm_pciids.h>

#include "mgag200_drv.h"

int mgag200_modeset = -1;
MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
module_param_named(modeset, mgag200_modeset, int, 0400);

int mgag200_init_pci_options(struct pci_dev *pdev, u32 option, u32 option2)
{
	struct device *dev = &pdev->dev;
	int err;

	err = pci_write_config_dword(pdev, PCI_MGA_OPTION, option);
	if (err != PCIBIOS_SUCCESSFUL) {
		dev_err(dev, "pci_write_config_dword(PCI_MGA_OPTION) failed: %d\n", err);
		return pcibios_err_to_errno(err);
	}

	err = pci_write_config_dword(pdev, PCI_MGA_OPTION2, option2);
	if (err != PCIBIOS_SUCCESSFUL) {
		dev_err(dev, "pci_write_config_dword(PCI_MGA_OPTION2) failed: %d\n", err);
		return pcibios_err_to_errno(err);
	}

	return 0;
}

resource_size_t mgag200_probe_vram(void __iomem *mem, resource_size_t size)
{
	int offset;
	int orig;
	int test1, test2;
	int orig1, orig2;
	size_t vram_size;

	/* Probe */
	orig = ioread16(mem);
	iowrite16(0, mem);

	vram_size = size;

	for (offset = 0x100000; offset < vram_size; offset += 0x4000) {
		orig1 = ioread8(mem + offset);
		orig2 = ioread8(mem + offset + 0x100);

		iowrite16(0xaa55, mem + offset);
		iowrite16(0xaa55, mem + offset + 0x100);

		test1 = ioread16(mem + offset);
		test2 = ioread16(mem);

		iowrite16(orig1, mem + offset);
		iowrite16(orig2, mem + offset + 0x100);

		if (test1 != 0xaa55)
			break;

		if (test2)
			break;
	}

	iowrite16(orig, mem);

	return offset - 65536;
}

/*
 * DRM driver
 */

DEFINE_DRM_GEM_FOPS(mgag200_driver_fops);

static const struct drm_driver mgag200_driver = {
	.driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
	.fops = &mgag200_driver_fops,
	.name = DRIVER_NAME,
	.desc = DRIVER_DESC,
	.date = DRIVER_DATE,
	.major = DRIVER_MAJOR,
	.minor = DRIVER_MINOR,
	.patchlevel = DRIVER_PATCHLEVEL,
	DRM_GEM_SHMEM_DRIVER_OPS,
};

/*
 * DRM device
 */

resource_size_t mgag200_device_probe_vram(struct mga_device *mdev)
{
	return mgag200_probe_vram(mdev->vram, resource_size(mdev->vram_res));
}

int mgag200_device_preinit(struct mga_device *mdev)
{
	struct drm_device *dev = &mdev->base;
	struct pci_dev *pdev = to_pci_dev(dev->dev);
	resource_size_t start, len;
	struct resource *res;

	/* BAR 1 contains registers */

	start = pci_resource_start(pdev, 1);
	len = pci_resource_len(pdev, 1);

	res = devm_request_mem_region(dev->dev, start, len, "mgadrmfb_mmio");
	if (!res) {
		drm_err(dev, "devm_request_mem_region(MMIO) failed\n");
		return -ENXIO;
	}
	mdev->rmmio_res = res;

	mdev->rmmio = pcim_iomap(pdev, 1, 0);
	if (!mdev->rmmio)
		return -ENOMEM;

	/* BAR 0 is VRAM */

	start = pci_resource_start(pdev, 0);
	len = pci_resource_len(pdev, 0);

	res = devm_request_mem_region(dev->dev, start, len, "mgadrmfb_vram");
	if (!res) {
		drm_err(dev, "devm_request_mem_region(VRAM) failed\n");
		return -ENXIO;
	}
	mdev->vram_res = res;

	/* Don't fail on errors, but performance might be reduced. */
	devm_arch_io_reserve_memtype_wc(dev->dev, res->start, resource_size(res));
	devm_arch_phys_wc_add(dev->dev, res->start, resource_size(res));

	mdev->vram = devm_ioremap(dev->dev, res->start, resource_size(res));
	if (!mdev->vram)
		return -ENOMEM;

	return 0;
}

int mgag200_device_init(struct mga_device *mdev,
			const struct mgag200_device_info *info,
			const struct mgag200_device_funcs *funcs)
{
	struct drm_device *dev = &mdev->base;
	u8 crtcext3, misc;
	int ret;

	mdev->info = info;
	mdev->funcs = funcs;

	ret = drmm_mutex_init(dev, &mdev->rmmio_lock);
	if (ret)
		return ret;

	mutex_lock(&mdev->rmmio_lock);

	RREG_ECRT(0x03, crtcext3);
	crtcext3 |= MGAREG_CRTCEXT3_MGAMODE;
	WREG_ECRT(0x03, crtcext3);

	WREG_ECRT(0x04, 0x00);

	misc = RREG8(MGA_MISC_IN);
	misc |= MGAREG_MISC_RAMMAPEN |
		MGAREG_MISC_HIGH_PG_SEL;
	WREG8(MGA_MISC_OUT, misc);

	mutex_unlock(&mdev->rmmio_lock);

	return 0;
}

/*
 * PCI driver
 */

static const struct pci_device_id mgag200_pciidlist[] = {
	{ PCI_VENDOR_ID_MATROX, 0x520, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_PCI },
	{ PCI_VENDOR_ID_MATROX, 0x521, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_AGP },
	{ PCI_VENDOR_ID_MATROX, 0x522, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_A },
	{ PCI_VENDOR_ID_MATROX, 0x524, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_B },
	{ PCI_VENDOR_ID_MATROX, 0x530, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EV },
	{ PCI_VENDOR_ID_MATROX, 0x532, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_WB },
	{ PCI_VENDOR_ID_MATROX, 0x533, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH },
	{ PCI_VENDOR_ID_MATROX, 0x534, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_ER },
	{ PCI_VENDOR_ID_MATROX, 0x536, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EW3 },
	{ PCI_VENDOR_ID_MATROX, 0x538, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH3 },
	{0,}
};

MODULE_DEVICE_TABLE(pci, mgag200_pciidlist);

static int
mgag200_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	enum mga_type type = (enum mga_type)ent->driver_data;
	struct mga_device *mdev;
	struct drm_device *dev;
	int ret;

	ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &mgag200_driver);
	if (ret)
		return ret;

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

	switch (type) {
	case G200_PCI:
	case G200_AGP:
		mdev = mgag200_g200_device_create(pdev, &mgag200_driver);
		break;
	case G200_SE_A:
	case G200_SE_B:
		mdev = mgag200_g200se_device_create(pdev, &mgag200_driver, type);
		break;
	case G200_WB:
		mdev = mgag200_g200wb_device_create(pdev, &mgag200_driver);
		break;
	case G200_EV:
		mdev = mgag200_g200ev_device_create(pdev, &mgag200_driver);
		break;
	case G200_EH:
		mdev = mgag200_g200eh_device_create(pdev, &mgag200_driver);
		break;
	case G200_EH3:
		mdev = mgag200_g200eh3_device_create(pdev, &mgag200_driver);
		break;
	case G200_ER:
		mdev = mgag200_g200er_device_create(pdev, &mgag200_driver);
		break;
	case G200_EW3:
		mdev = mgag200_g200ew3_device_create(pdev, &mgag200_driver);
		break;
	default:
		dev_err(&pdev->dev, "Device type %d is unsupported\n", type);
		return -ENODEV;
	}
	if (IS_ERR(mdev))
		return PTR_ERR(mdev);
	dev = &mdev->base;

	ret = drm_dev_register(dev, 0);
	if (ret)
		return ret;

	/*
	 * FIXME: A 24-bit color depth does not work with 24 bpp on
	 * G200ER. Force 32 bpp.
	 */
	drm_fbdev_generic_setup(dev, 32);

	return 0;
}

static void mgag200_pci_remove(struct pci_dev *pdev)
{
	struct drm_device *dev = pci_get_drvdata(pdev);

	drm_dev_unregister(dev);
}

static struct pci_driver mgag200_pci_driver = {
	.name = DRIVER_NAME,
	.id_table = mgag200_pciidlist,
	.probe = mgag200_pci_probe,
	.remove = mgag200_pci_remove,
};

drm_module_pci_driver_if_modeset(mgag200_pci_driver, mgag200_modeset);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");