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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright 2012 Red Hat
4 *
5 * Authors: Matthew Garrett
6 * Dave Airlie
7 */
8
9#include <linux/module.h>
10#include <linux/pci.h>
11
12#include <drm/drm_aperture.h>
13#include <drm/drm_atomic_helper.h>
14#include <drm/drm_drv.h>
15#include <drm/drm_fbdev_generic.h>
16#include <drm/drm_file.h>
17#include <drm/drm_ioctl.h>
18#include <drm/drm_managed.h>
19#include <drm/drm_module.h>
20#include <drm/drm_pciids.h>
21
22#include "mgag200_drv.h"
23
24static int mgag200_modeset = -1;
25MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
26module_param_named(modeset, mgag200_modeset, int, 0400);
27
28int mgag200_init_pci_options(struct pci_dev *pdev, u32 option, u32 option2)
29{
30 struct device *dev = &pdev->dev;
31 int err;
32
33 err = pci_write_config_dword(pdev, PCI_MGA_OPTION, option);
34 if (err != PCIBIOS_SUCCESSFUL) {
35 dev_err(dev, "pci_write_config_dword(PCI_MGA_OPTION) failed: %d\n", err);
36 return pcibios_err_to_errno(err);
37 }
38
39 err = pci_write_config_dword(pdev, PCI_MGA_OPTION2, option2);
40 if (err != PCIBIOS_SUCCESSFUL) {
41 dev_err(dev, "pci_write_config_dword(PCI_MGA_OPTION2) failed: %d\n", err);
42 return pcibios_err_to_errno(err);
43 }
44
45 return 0;
46}
47
48resource_size_t mgag200_probe_vram(void __iomem *mem, resource_size_t size)
49{
50 int offset;
51 int orig;
52 int test1, test2;
53 int orig1, orig2;
54 size_t vram_size;
55
56 /* Probe */
57 orig = ioread16(mem);
58 iowrite16(0, mem);
59
60 vram_size = size;
61
62 for (offset = 0x100000; offset < vram_size; offset += 0x4000) {
63 orig1 = ioread8(mem + offset);
64 orig2 = ioread8(mem + offset + 0x100);
65
66 iowrite16(0xaa55, mem + offset);
67 iowrite16(0xaa55, mem + offset + 0x100);
68
69 test1 = ioread16(mem + offset);
70 test2 = ioread16(mem);
71
72 iowrite16(orig1, mem + offset);
73 iowrite16(orig2, mem + offset + 0x100);
74
75 if (test1 != 0xaa55)
76 break;
77
78 if (test2)
79 break;
80 }
81
82 iowrite16(orig, mem);
83
84 return offset - 65536;
85}
86
87/*
88 * DRM driver
89 */
90
91DEFINE_DRM_GEM_FOPS(mgag200_driver_fops);
92
93static const struct drm_driver mgag200_driver = {
94 .driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
95 .fops = &mgag200_driver_fops,
96 .name = DRIVER_NAME,
97 .desc = DRIVER_DESC,
98 .date = DRIVER_DATE,
99 .major = DRIVER_MAJOR,
100 .minor = DRIVER_MINOR,
101 .patchlevel = DRIVER_PATCHLEVEL,
102 DRM_GEM_SHMEM_DRIVER_OPS,
103};
104
105/*
106 * DRM device
107 */
108
109resource_size_t mgag200_device_probe_vram(struct mga_device *mdev)
110{
111 return mgag200_probe_vram(mdev->vram, resource_size(mdev->vram_res));
112}
113
114int mgag200_device_preinit(struct mga_device *mdev)
115{
116 struct drm_device *dev = &mdev->base;
117 struct pci_dev *pdev = to_pci_dev(dev->dev);
118 resource_size_t start, len;
119 struct resource *res;
120
121 /* BAR 1 contains registers */
122
123 start = pci_resource_start(pdev, 1);
124 len = pci_resource_len(pdev, 1);
125
126 res = devm_request_mem_region(dev->dev, start, len, "mgadrmfb_mmio");
127 if (!res) {
128 drm_err(dev, "devm_request_mem_region(MMIO) failed\n");
129 return -ENXIO;
130 }
131 mdev->rmmio_res = res;
132
133 mdev->rmmio = pcim_iomap(pdev, 1, 0);
134 if (!mdev->rmmio)
135 return -ENOMEM;
136
137 /* BAR 0 is VRAM */
138
139 start = pci_resource_start(pdev, 0);
140 len = pci_resource_len(pdev, 0);
141
142 res = devm_request_mem_region(dev->dev, start, len, "mgadrmfb_vram");
143 if (!res) {
144 drm_err(dev, "devm_request_mem_region(VRAM) failed\n");
145 return -ENXIO;
146 }
147 mdev->vram_res = res;
148
149 /* Don't fail on errors, but performance might be reduced. */
150 devm_arch_io_reserve_memtype_wc(dev->dev, res->start, resource_size(res));
151 devm_arch_phys_wc_add(dev->dev, res->start, resource_size(res));
152
153 mdev->vram = devm_ioremap(dev->dev, res->start, resource_size(res));
154 if (!mdev->vram)
155 return -ENOMEM;
156
157 return 0;
158}
159
160int mgag200_device_init(struct mga_device *mdev,
161 const struct mgag200_device_info *info,
162 const struct mgag200_device_funcs *funcs)
163{
164 struct drm_device *dev = &mdev->base;
165 u8 crtcext3, misc;
166 int ret;
167
168 mdev->info = info;
169 mdev->funcs = funcs;
170
171 ret = drmm_mutex_init(dev, &mdev->rmmio_lock);
172 if (ret)
173 return ret;
174
175 mutex_lock(&mdev->rmmio_lock);
176
177 RREG_ECRT(0x03, crtcext3);
178 crtcext3 |= MGAREG_CRTCEXT3_MGAMODE;
179 WREG_ECRT(0x03, crtcext3);
180
181 WREG_ECRT(0x04, 0x00);
182
183 misc = RREG8(MGA_MISC_IN);
184 misc |= MGAREG_MISC_RAMMAPEN |
185 MGAREG_MISC_HIGH_PG_SEL;
186 WREG8(MGA_MISC_OUT, misc);
187
188 mutex_unlock(&mdev->rmmio_lock);
189
190 return 0;
191}
192
193/*
194 * PCI driver
195 */
196
197static const struct pci_device_id mgag200_pciidlist[] = {
198 { PCI_VENDOR_ID_MATROX, 0x520, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_PCI },
199 { PCI_VENDOR_ID_MATROX, 0x521, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_AGP },
200 { PCI_VENDOR_ID_MATROX, 0x522, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_A },
201 { PCI_VENDOR_ID_MATROX, 0x524, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_B },
202 { PCI_VENDOR_ID_MATROX, 0x530, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EV },
203 { PCI_VENDOR_ID_MATROX, 0x532, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_WB },
204 { PCI_VENDOR_ID_MATROX, 0x533, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH },
205 { PCI_VENDOR_ID_MATROX, 0x534, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_ER },
206 { PCI_VENDOR_ID_MATROX, 0x536, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EW3 },
207 { PCI_VENDOR_ID_MATROX, 0x538, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH3 },
208 {0,}
209};
210
211MODULE_DEVICE_TABLE(pci, mgag200_pciidlist);
212
213static int
214mgag200_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
215{
216 enum mga_type type = (enum mga_type)ent->driver_data;
217 struct mga_device *mdev;
218 struct drm_device *dev;
219 int ret;
220
221 ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &mgag200_driver);
222 if (ret)
223 return ret;
224
225 ret = pcim_enable_device(pdev);
226 if (ret)
227 return ret;
228
229 switch (type) {
230 case G200_PCI:
231 case G200_AGP:
232 mdev = mgag200_g200_device_create(pdev, &mgag200_driver);
233 break;
234 case G200_SE_A:
235 case G200_SE_B:
236 mdev = mgag200_g200se_device_create(pdev, &mgag200_driver, type);
237 break;
238 case G200_WB:
239 mdev = mgag200_g200wb_device_create(pdev, &mgag200_driver);
240 break;
241 case G200_EV:
242 mdev = mgag200_g200ev_device_create(pdev, &mgag200_driver);
243 break;
244 case G200_EH:
245 mdev = mgag200_g200eh_device_create(pdev, &mgag200_driver);
246 break;
247 case G200_EH3:
248 mdev = mgag200_g200eh3_device_create(pdev, &mgag200_driver);
249 break;
250 case G200_ER:
251 mdev = mgag200_g200er_device_create(pdev, &mgag200_driver);
252 break;
253 case G200_EW3:
254 mdev = mgag200_g200ew3_device_create(pdev, &mgag200_driver);
255 break;
256 default:
257 dev_err(&pdev->dev, "Device type %d is unsupported\n", type);
258 return -ENODEV;
259 }
260 if (IS_ERR(mdev))
261 return PTR_ERR(mdev);
262 dev = &mdev->base;
263
264 ret = drm_dev_register(dev, 0);
265 if (ret)
266 return ret;
267
268 /*
269 * FIXME: A 24-bit color depth does not work with 24 bpp on
270 * G200ER. Force 32 bpp.
271 */
272 drm_fbdev_generic_setup(dev, 32);
273
274 return 0;
275}
276
277static void mgag200_pci_remove(struct pci_dev *pdev)
278{
279 struct drm_device *dev = pci_get_drvdata(pdev);
280
281 drm_dev_unregister(dev);
282 drm_atomic_helper_shutdown(dev);
283}
284
285static void mgag200_pci_shutdown(struct pci_dev *pdev)
286{
287 drm_atomic_helper_shutdown(pci_get_drvdata(pdev));
288}
289
290static struct pci_driver mgag200_pci_driver = {
291 .name = DRIVER_NAME,
292 .id_table = mgag200_pciidlist,
293 .probe = mgag200_pci_probe,
294 .remove = mgag200_pci_remove,
295 .shutdown = mgag200_pci_shutdown,
296};
297
298drm_module_pci_driver_if_modeset(mgag200_pci_driver, mgag200_modeset);
299
300MODULE_AUTHOR(DRIVER_AUTHOR);
301MODULE_DESCRIPTION(DRIVER_DESC);
302MODULE_LICENSE("GPL");