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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/aperture.h>
10#include <linux/module.h>
11#include <linux/pci.h>
12
13#include <drm/drm_atomic_helper.h>
14#include <drm/drm_client_setup.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
26static int mgag200_modeset = -1;
27MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
28module_param_named(modeset, mgag200_modeset, int, 0400);
29
30int 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
50resource_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
93DEFINE_DRM_GEM_FOPS(mgag200_driver_fops);
94
95static 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 .date = DRIVER_DATE,
101 .major = DRIVER_MAJOR,
102 .minor = DRIVER_MINOR,
103 .patchlevel = DRIVER_PATCHLEVEL,
104 DRM_GEM_SHMEM_DRIVER_OPS,
105 DRM_FBDEV_SHMEM_DRIVER_OPS,
106};
107
108/*
109 * DRM device
110 */
111
112resource_size_t mgag200_device_probe_vram(struct mga_device *mdev)
113{
114 return mgag200_probe_vram(mdev->vram, resource_size(mdev->vram_res));
115}
116
117int mgag200_device_preinit(struct mga_device *mdev)
118{
119 struct drm_device *dev = &mdev->base;
120 struct pci_dev *pdev = to_pci_dev(dev->dev);
121 resource_size_t start, len;
122 struct resource *res;
123
124 /* BAR 1 contains registers */
125
126 start = pci_resource_start(pdev, 1);
127 len = pci_resource_len(pdev, 1);
128
129 res = devm_request_mem_region(dev->dev, start, len, "mgadrmfb_mmio");
130 if (!res) {
131 drm_err(dev, "devm_request_mem_region(MMIO) failed\n");
132 return -ENXIO;
133 }
134 mdev->rmmio_res = res;
135
136 mdev->rmmio = pcim_iomap(pdev, 1, 0);
137 if (!mdev->rmmio)
138 return -ENOMEM;
139
140 /* BAR 0 is VRAM */
141
142 start = pci_resource_start(pdev, 0);
143 len = pci_resource_len(pdev, 0);
144
145 res = devm_request_mem_region(dev->dev, start, len, "mgadrmfb_vram");
146 if (!res) {
147 drm_err(dev, "devm_request_mem_region(VRAM) failed\n");
148 return -ENXIO;
149 }
150 mdev->vram_res = res;
151
152#if defined(CONFIG_DRM_MGAG200_DISABLE_WRITECOMBINE)
153 mdev->vram = devm_ioremap(dev->dev, res->start, resource_size(res));
154 if (!mdev->vram)
155 return -ENOMEM;
156#else
157 mdev->vram = devm_ioremap_wc(dev->dev, res->start, resource_size(res));
158 if (!mdev->vram)
159 return -ENOMEM;
160
161 /* Don't fail on errors, but performance might be reduced. */
162 devm_arch_phys_wc_add(dev->dev, res->start, resource_size(res));
163#endif
164
165 return 0;
166}
167
168int mgag200_device_init(struct mga_device *mdev,
169 const struct mgag200_device_info *info,
170 const struct mgag200_device_funcs *funcs)
171{
172 struct drm_device *dev = &mdev->base;
173 u8 crtcext3, misc;
174 int ret;
175
176 mdev->info = info;
177 mdev->funcs = funcs;
178
179 ret = drmm_mutex_init(dev, &mdev->rmmio_lock);
180 if (ret)
181 return ret;
182
183 mutex_lock(&mdev->rmmio_lock);
184
185 RREG_ECRT(0x03, crtcext3);
186 crtcext3 |= MGAREG_CRTCEXT3_MGAMODE;
187 WREG_ECRT(0x03, crtcext3);
188
189 WREG_ECRT(0x04, 0x00);
190
191 misc = RREG8(MGA_MISC_IN);
192 misc |= MGAREG_MISC_RAMMAPEN |
193 MGAREG_MISC_HIGH_PG_SEL;
194 WREG8(MGA_MISC_OUT, misc);
195
196 mutex_unlock(&mdev->rmmio_lock);
197
198 WREG32(MGAREG_IEN, 0);
199
200 return 0;
201}
202
203/*
204 * PCI driver
205 */
206
207static const struct pci_device_id mgag200_pciidlist[] = {
208 { PCI_VENDOR_ID_MATROX, 0x520, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_PCI },
209 { PCI_VENDOR_ID_MATROX, 0x521, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_AGP },
210 { PCI_VENDOR_ID_MATROX, 0x522, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_A },
211 { PCI_VENDOR_ID_MATROX, 0x524, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_B },
212 { PCI_VENDOR_ID_MATROX, 0x530, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EV },
213 { PCI_VENDOR_ID_MATROX, 0x532, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_WB },
214 { PCI_VENDOR_ID_MATROX, 0x533, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH },
215 { PCI_VENDOR_ID_MATROX, 0x534, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_ER },
216 { PCI_VENDOR_ID_MATROX, 0x536, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EW3 },
217 { PCI_VENDOR_ID_MATROX, 0x538, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH3 },
218 {0,}
219};
220
221MODULE_DEVICE_TABLE(pci, mgag200_pciidlist);
222
223static int
224mgag200_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_ER:
261 mdev = mgag200_g200er_device_create(pdev, &mgag200_driver);
262 break;
263 case G200_EW3:
264 mdev = mgag200_g200ew3_device_create(pdev, &mgag200_driver);
265 break;
266 default:
267 dev_err(&pdev->dev, "Device type %d is unsupported\n", type);
268 return -ENODEV;
269 }
270 if (IS_ERR(mdev))
271 return PTR_ERR(mdev);
272 dev = &mdev->base;
273
274 ret = drm_dev_register(dev, 0);
275 if (ret)
276 return ret;
277
278 /*
279 * FIXME: A 24-bit color depth does not work with 24 bpp on
280 * G200ER. Force 32 bpp.
281 */
282 drm_client_setup_with_fourcc(dev, DRM_FORMAT_XRGB8888);
283
284 return 0;
285}
286
287static void mgag200_pci_remove(struct pci_dev *pdev)
288{
289 struct drm_device *dev = pci_get_drvdata(pdev);
290
291 drm_dev_unregister(dev);
292 drm_atomic_helper_shutdown(dev);
293}
294
295static void mgag200_pci_shutdown(struct pci_dev *pdev)
296{
297 drm_atomic_helper_shutdown(pci_get_drvdata(pdev));
298}
299
300static struct pci_driver mgag200_pci_driver = {
301 .name = DRIVER_NAME,
302 .id_table = mgag200_pciidlist,
303 .probe = mgag200_pci_probe,
304 .remove = mgag200_pci_remove,
305 .shutdown = mgag200_pci_shutdown,
306};
307
308drm_module_pci_driver_if_modeset(mgag200_pci_driver, mgag200_modeset);
309
310MODULE_AUTHOR(DRIVER_AUTHOR);
311MODULE_DESCRIPTION(DRIVER_DESC);
312MODULE_LICENSE("GPL");