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