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#if defined(CONFIG_DRM_MGAG200_IOBURST_WORKAROUND)
88static struct drm_gem_object *mgag200_create_object(struct drm_device *dev, size_t size)
89{
90	struct drm_gem_shmem_object *shmem;
91
92	shmem = kzalloc(sizeof(*shmem), GFP_KERNEL);
93	if (!shmem)
94		return NULL;
95
96	shmem->map_wc = true;
97	return &shmem->base;
98}
99#endif
100
101/*
102 * DRM driver
103 */
104
105DEFINE_DRM_GEM_FOPS(mgag200_driver_fops);
106
107static const struct drm_driver mgag200_driver = {
108	.driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
109	.fops = &mgag200_driver_fops,
110	.name = DRIVER_NAME,
111	.desc = DRIVER_DESC,
112	.date = DRIVER_DATE,
113	.major = DRIVER_MAJOR,
114	.minor = DRIVER_MINOR,
115	.patchlevel = DRIVER_PATCHLEVEL,
116#if defined(CONFIG_DRM_MGAG200_IOBURST_WORKAROUND)
117	.gem_create_object = mgag200_create_object,
118#endif
119	DRM_GEM_SHMEM_DRIVER_OPS,
120};
121
122/*
123 * DRM device
124 */
125
126resource_size_t mgag200_device_probe_vram(struct mga_device *mdev)
127{
128	return mgag200_probe_vram(mdev->vram, resource_size(mdev->vram_res));
129}
130
131int mgag200_device_preinit(struct mga_device *mdev)
132{
133	struct drm_device *dev = &mdev->base;
134	struct pci_dev *pdev = to_pci_dev(dev->dev);
135	resource_size_t start, len;
136	struct resource *res;
137
138	/* BAR 1 contains registers */
139
140	start = pci_resource_start(pdev, 1);
141	len = pci_resource_len(pdev, 1);
142
143	res = devm_request_mem_region(dev->dev, start, len, "mgadrmfb_mmio");
144	if (!res) {
145		drm_err(dev, "devm_request_mem_region(MMIO) failed\n");
146		return -ENXIO;
147	}
148	mdev->rmmio_res = res;
149
150	mdev->rmmio = pcim_iomap(pdev, 1, 0);
151	if (!mdev->rmmio)
152		return -ENOMEM;
153
154	/* BAR 0 is VRAM */
155
156	start = pci_resource_start(pdev, 0);
157	len = pci_resource_len(pdev, 0);
158
159	res = devm_request_mem_region(dev->dev, start, len, "mgadrmfb_vram");
160	if (!res) {
161		drm_err(dev, "devm_request_mem_region(VRAM) failed\n");
162		return -ENXIO;
163	}
164	mdev->vram_res = res;
165
166	mdev->vram = devm_ioremap_wc(dev->dev, res->start, resource_size(res));
167	if (!mdev->vram)
168		return -ENOMEM;
169
170	/* Don't fail on errors, but performance might be reduced. */
171	devm_arch_phys_wc_add(dev->dev, res->start, resource_size(res));
172
173	return 0;
174}
175
176int mgag200_device_init(struct mga_device *mdev,
177			const struct mgag200_device_info *info,
178			const struct mgag200_device_funcs *funcs)
179{
180	struct drm_device *dev = &mdev->base;
181	u8 crtcext3, misc;
182	int ret;
183
184	mdev->info = info;
185	mdev->funcs = funcs;
186
187	ret = drmm_mutex_init(dev, &mdev->rmmio_lock);
188	if (ret)
189		return ret;
190
191	mutex_lock(&mdev->rmmio_lock);
192
193	RREG_ECRT(0x03, crtcext3);
194	crtcext3 |= MGAREG_CRTCEXT3_MGAMODE;
195	WREG_ECRT(0x03, crtcext3);
196
197	WREG_ECRT(0x04, 0x00);
198
199	misc = RREG8(MGA_MISC_IN);
200	misc |= MGAREG_MISC_RAMMAPEN |
201		MGAREG_MISC_HIGH_PG_SEL;
202	WREG8(MGA_MISC_OUT, misc);
203
204	mutex_unlock(&mdev->rmmio_lock);
205
206	return 0;
207}
208
209/*
210 * PCI driver
211 */
212
213static const struct pci_device_id mgag200_pciidlist[] = {
214	{ PCI_VENDOR_ID_MATROX, 0x520, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_PCI },
215	{ PCI_VENDOR_ID_MATROX, 0x521, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_AGP },
216	{ PCI_VENDOR_ID_MATROX, 0x522, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_A },
217	{ PCI_VENDOR_ID_MATROX, 0x524, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_B },
218	{ PCI_VENDOR_ID_MATROX, 0x530, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EV },
219	{ PCI_VENDOR_ID_MATROX, 0x532, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_WB },
220	{ PCI_VENDOR_ID_MATROX, 0x533, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH },
221	{ PCI_VENDOR_ID_MATROX, 0x534, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_ER },
222	{ PCI_VENDOR_ID_MATROX, 0x536, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EW3 },
223	{ PCI_VENDOR_ID_MATROX, 0x538, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH3 },
224	{0,}
225};
226
227MODULE_DEVICE_TABLE(pci, mgag200_pciidlist);
228
229static int
230mgag200_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
231{
232	enum mga_type type = (enum mga_type)ent->driver_data;
233	struct mga_device *mdev;
234	struct drm_device *dev;
235	int ret;
236
237	ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &mgag200_driver);
238	if (ret)
239		return ret;
240
241	ret = pcim_enable_device(pdev);
242	if (ret)
243		return ret;
244
245	switch (type) {
246	case G200_PCI:
247	case G200_AGP:
248		mdev = mgag200_g200_device_create(pdev, &mgag200_driver);
249		break;
250	case G200_SE_A:
251	case G200_SE_B:
252		mdev = mgag200_g200se_device_create(pdev, &mgag200_driver, type);
253		break;
254	case G200_WB:
255		mdev = mgag200_g200wb_device_create(pdev, &mgag200_driver);
256		break;
257	case G200_EV:
258		mdev = mgag200_g200ev_device_create(pdev, &mgag200_driver);
259		break;
260	case G200_EH:
261		mdev = mgag200_g200eh_device_create(pdev, &mgag200_driver);
262		break;
263	case G200_EH3:
264		mdev = mgag200_g200eh3_device_create(pdev, &mgag200_driver);
265		break;
266	case G200_ER:
267		mdev = mgag200_g200er_device_create(pdev, &mgag200_driver);
268		break;
269	case G200_EW3:
270		mdev = mgag200_g200ew3_device_create(pdev, &mgag200_driver);
271		break;
272	default:
273		dev_err(&pdev->dev, "Device type %d is unsupported\n", type);
274		return -ENODEV;
275	}
276	if (IS_ERR(mdev))
277		return PTR_ERR(mdev);
278	dev = &mdev->base;
279
280	ret = drm_dev_register(dev, 0);
281	if (ret)
282		return ret;
283
284	/*
285	 * FIXME: A 24-bit color depth does not work with 24 bpp on
286	 * G200ER. Force 32 bpp.
287	 */
288	drm_fbdev_generic_setup(dev, 32);
289
290	return 0;
291}
292
293static void mgag200_pci_remove(struct pci_dev *pdev)
294{
295	struct drm_device *dev = pci_get_drvdata(pdev);
296
297	drm_dev_unregister(dev);
298	drm_atomic_helper_shutdown(dev);
299}
300
301static void mgag200_pci_shutdown(struct pci_dev *pdev)
302{
303	drm_atomic_helper_shutdown(pci_get_drvdata(pdev));
304}
305
306static struct pci_driver mgag200_pci_driver = {
307	.name = DRIVER_NAME,
308	.id_table = mgag200_pciidlist,
309	.probe = mgag200_pci_probe,
310	.remove = mgag200_pci_remove,
311	.shutdown = mgag200_pci_shutdown,
312};
313
314drm_module_pci_driver_if_modeset(mgag200_pci_driver, mgag200_modeset);
315
316MODULE_AUTHOR(DRIVER_AUTHOR);
317MODULE_DESCRIPTION(DRIVER_DESC);
318MODULE_LICENSE("GPL");
319