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/aperture.h>
10 #include <linux/module.h>
11 #include <linux/pci.h>
12
13 #include <drm/clients/drm_client_setup.h>
14 #include <drm/drm_atomic_helper.h>
15 #include <drm/drm_drv.h>
16 #include <drm/drm_fbdev_shmem.h>
17 #include <drm/drm_file.h>
18 #include <drm/drm_fourcc.h>
19 #include <drm/drm_ioctl.h>
20 #include <drm/drm_managed.h>
21 #include <drm/drm_module.h>
22 #include <drm/drm_pciids.h>
23
24 #include "mgag200_drv.h"
25
26 static int mgag200_modeset = -1;
27 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
28 module_param_named(modeset, mgag200_modeset, int, 0400);
29
mgag200_init_pci_options(struct pci_dev * pdev,u32 option,u32 option2)30 int mgag200_init_pci_options(struct pci_dev *pdev, u32 option, u32 option2)
31 {
32 struct device *dev = &pdev->dev;
33 int err;
34
35 err = pci_write_config_dword(pdev, PCI_MGA_OPTION, option);
36 if (err != PCIBIOS_SUCCESSFUL) {
37 dev_err(dev, "pci_write_config_dword(PCI_MGA_OPTION) failed: %d\n", err);
38 return pcibios_err_to_errno(err);
39 }
40
41 err = pci_write_config_dword(pdev, PCI_MGA_OPTION2, option2);
42 if (err != PCIBIOS_SUCCESSFUL) {
43 dev_err(dev, "pci_write_config_dword(PCI_MGA_OPTION2) failed: %d\n", err);
44 return pcibios_err_to_errno(err);
45 }
46
47 return 0;
48 }
49
mgag200_probe_vram(void __iomem * mem,resource_size_t size)50 resource_size_t mgag200_probe_vram(void __iomem *mem, resource_size_t size)
51 {
52 int offset;
53 int orig;
54 int test1, test2;
55 int orig1, orig2;
56 size_t vram_size;
57
58 /* Probe */
59 orig = ioread16(mem);
60 iowrite16(0, mem);
61
62 vram_size = size;
63
64 for (offset = 0x100000; offset < vram_size; offset += 0x4000) {
65 orig1 = ioread8(mem + offset);
66 orig2 = ioread8(mem + offset + 0x100);
67
68 iowrite16(0xaa55, mem + offset);
69 iowrite16(0xaa55, mem + offset + 0x100);
70
71 test1 = ioread16(mem + offset);
72 test2 = ioread16(mem);
73
74 iowrite16(orig1, mem + offset);
75 iowrite16(orig2, mem + offset + 0x100);
76
77 if (test1 != 0xaa55)
78 break;
79
80 if (test2)
81 break;
82 }
83
84 iowrite16(orig, mem);
85
86 return offset - 65536;
87 }
88
89 /*
90 * DRM driver
91 */
92
93 DEFINE_DRM_GEM_FOPS(mgag200_driver_fops);
94
95 static const struct drm_driver mgag200_driver = {
96 .driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
97 .fops = &mgag200_driver_fops,
98 .name = DRIVER_NAME,
99 .desc = DRIVER_DESC,
100 .major = DRIVER_MAJOR,
101 .minor = DRIVER_MINOR,
102 .patchlevel = DRIVER_PATCHLEVEL,
103 DRM_GEM_SHMEM_DRIVER_OPS,
104 DRM_FBDEV_SHMEM_DRIVER_OPS,
105 };
106
107 /*
108 * DRM device
109 */
110
mgag200_device_probe_vram(struct mga_device * mdev)111 resource_size_t mgag200_device_probe_vram(struct mga_device *mdev)
112 {
113 return mgag200_probe_vram(mdev->vram, resource_size(mdev->vram_res));
114 }
115
mgag200_device_preinit(struct mga_device * mdev)116 int mgag200_device_preinit(struct mga_device *mdev)
117 {
118 struct drm_device *dev = &mdev->base;
119 struct pci_dev *pdev = to_pci_dev(dev->dev);
120 resource_size_t start, len;
121 struct resource *res;
122
123 /* BAR 1 contains registers */
124
125 start = pci_resource_start(pdev, 1);
126 len = pci_resource_len(pdev, 1);
127
128 res = devm_request_mem_region(dev->dev, start, len, "mgadrmfb_mmio");
129 if (!res) {
130 drm_err(dev, "devm_request_mem_region(MMIO) failed\n");
131 return -ENXIO;
132 }
133 mdev->rmmio_res = res;
134
135 mdev->rmmio = pcim_iomap(pdev, 1, 0);
136 if (!mdev->rmmio)
137 return -ENOMEM;
138
139 /* BAR 0 is VRAM */
140
141 start = pci_resource_start(pdev, 0);
142 len = pci_resource_len(pdev, 0);
143
144 res = devm_request_mem_region(dev->dev, start, len, "mgadrmfb_vram");
145 if (!res) {
146 drm_err(dev, "devm_request_mem_region(VRAM) failed\n");
147 return -ENXIO;
148 }
149 mdev->vram_res = res;
150
151 #if defined(CONFIG_DRM_MGAG200_DISABLE_WRITECOMBINE)
152 mdev->vram = devm_ioremap(dev->dev, res->start, resource_size(res));
153 if (!mdev->vram)
154 return -ENOMEM;
155 #else
156 mdev->vram = devm_ioremap_wc(dev->dev, res->start, resource_size(res));
157 if (!mdev->vram)
158 return -ENOMEM;
159
160 /* Don't fail on errors, but performance might be reduced. */
161 devm_arch_phys_wc_add(dev->dev, res->start, resource_size(res));
162 #endif
163
164 return 0;
165 }
166
mgag200_device_init(struct mga_device * mdev,const struct mgag200_device_info * info,const struct mgag200_device_funcs * funcs)167 int mgag200_device_init(struct mga_device *mdev,
168 const struct mgag200_device_info *info,
169 const struct mgag200_device_funcs *funcs)
170 {
171 struct drm_device *dev = &mdev->base;
172 u8 crtcext3, misc;
173 int ret;
174
175 mdev->info = info;
176 mdev->funcs = funcs;
177
178 ret = drmm_mutex_init(dev, &mdev->rmmio_lock);
179 if (ret)
180 return ret;
181
182 mutex_lock(&mdev->rmmio_lock);
183
184 RREG_ECRT(0x03, crtcext3);
185 crtcext3 |= MGAREG_CRTCEXT3_MGAMODE;
186 WREG_ECRT(0x03, crtcext3);
187
188 WREG_ECRT(0x04, 0x00);
189
190 misc = RREG8(MGA_MISC_IN);
191 misc |= MGAREG_MISC_RAMMAPEN |
192 MGAREG_MISC_HIGH_PG_SEL;
193 WREG8(MGA_MISC_OUT, misc);
194
195 mutex_unlock(&mdev->rmmio_lock);
196
197 WREG32(MGAREG_IEN, 0);
198
199 return 0;
200 }
201
202 /*
203 * PCI driver
204 */
205
206 static const struct pci_device_id mgag200_pciidlist[] = {
207 { PCI_VENDOR_ID_MATROX, 0x520, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_PCI },
208 { PCI_VENDOR_ID_MATROX, 0x521, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_AGP },
209 { PCI_VENDOR_ID_MATROX, 0x522, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_A },
210 { PCI_VENDOR_ID_MATROX, 0x524, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_B },
211 { PCI_VENDOR_ID_MATROX, 0x530, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EV },
212 { PCI_VENDOR_ID_MATROX, 0x532, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_WB },
213 { PCI_VENDOR_ID_MATROX, 0x533, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH },
214 { PCI_VENDOR_ID_MATROX, 0x534, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_ER },
215 { PCI_VENDOR_ID_MATROX, 0x536, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EW3 },
216 { PCI_VENDOR_ID_MATROX, 0x538, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH3 },
217 { PCI_VENDOR_ID_MATROX, 0x53a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH5 },
218 {0,}
219 };
220
221 MODULE_DEVICE_TABLE(pci, mgag200_pciidlist);
222
223 static int
mgag200_pci_probe(struct pci_dev * pdev,const struct pci_device_id * ent)224 mgag200_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
225 {
226 enum mga_type type = (enum mga_type)ent->driver_data;
227 struct mga_device *mdev;
228 struct drm_device *dev;
229 int ret;
230
231 ret = aperture_remove_conflicting_pci_devices(pdev, mgag200_driver.name);
232 if (ret)
233 return ret;
234
235 ret = pcim_enable_device(pdev);
236 if (ret)
237 return ret;
238
239 switch (type) {
240 case G200_PCI:
241 case G200_AGP:
242 mdev = mgag200_g200_device_create(pdev, &mgag200_driver);
243 break;
244 case G200_SE_A:
245 case G200_SE_B:
246 mdev = mgag200_g200se_device_create(pdev, &mgag200_driver, type);
247 break;
248 case G200_WB:
249 mdev = mgag200_g200wb_device_create(pdev, &mgag200_driver);
250 break;
251 case G200_EV:
252 mdev = mgag200_g200ev_device_create(pdev, &mgag200_driver);
253 break;
254 case G200_EH:
255 mdev = mgag200_g200eh_device_create(pdev, &mgag200_driver);
256 break;
257 case G200_EH3:
258 mdev = mgag200_g200eh3_device_create(pdev, &mgag200_driver);
259 break;
260 case G200_EH5:
261 mdev = mgag200_g200eh5_device_create(pdev, &mgag200_driver);
262 break;
263 case G200_ER:
264 mdev = mgag200_g200er_device_create(pdev, &mgag200_driver);
265 break;
266 case G200_EW3:
267 mdev = mgag200_g200ew3_device_create(pdev, &mgag200_driver);
268 break;
269 default:
270 dev_err(&pdev->dev, "Device type %d is unsupported\n", type);
271 return -ENODEV;
272 }
273 if (IS_ERR(mdev))
274 return PTR_ERR(mdev);
275 dev = &mdev->base;
276
277 ret = drm_dev_register(dev, 0);
278 if (ret)
279 return ret;
280
281 /*
282 * FIXME: A 24-bit color depth does not work with 24 bpp on
283 * G200ER. Force 32 bpp.
284 */
285 drm_client_setup_with_fourcc(dev, DRM_FORMAT_XRGB8888);
286
287 return 0;
288 }
289
mgag200_pci_remove(struct pci_dev * pdev)290 static void mgag200_pci_remove(struct pci_dev *pdev)
291 {
292 struct drm_device *dev = pci_get_drvdata(pdev);
293
294 drm_dev_unregister(dev);
295 drm_atomic_helper_shutdown(dev);
296 }
297
mgag200_pci_shutdown(struct pci_dev * pdev)298 static void mgag200_pci_shutdown(struct pci_dev *pdev)
299 {
300 drm_atomic_helper_shutdown(pci_get_drvdata(pdev));
301 }
302
303 static struct pci_driver mgag200_pci_driver = {
304 .name = DRIVER_NAME,
305 .id_table = mgag200_pciidlist,
306 .probe = mgag200_pci_probe,
307 .remove = mgag200_pci_remove,
308 .shutdown = mgag200_pci_shutdown,
309 };
310
311 drm_module_pci_driver_if_modeset(mgag200_pci_driver, mgag200_modeset);
312
313 MODULE_AUTHOR(DRIVER_AUTHOR);
314 MODULE_DESCRIPTION(DRIVER_DESC);
315 MODULE_LICENSE("GPL");
316