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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/console.h>
10 #include <linux/module.h>
11 #include <linux/pci.h>
12 #include <linux/vmalloc.h>
13 
14 #include <drm/drm_drv.h>
15 #include <drm/drm_file.h>
16 #include <drm/drm_ioctl.h>
17 #include <drm/drm_pciids.h>
18 
19 #include "mgag200_drv.h"
20 
21 int mgag200_modeset = -1;
22 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
23 module_param_named(modeset, mgag200_modeset, int, 0400);
24 
25 /*
26  * DRM driver
27  */
28 
29 DEFINE_DRM_GEM_FOPS(mgag200_driver_fops);
30 
31 static struct drm_driver mgag200_driver = {
32 	.driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
33 	.fops = &mgag200_driver_fops,
34 	.name = DRIVER_NAME,
35 	.desc = DRIVER_DESC,
36 	.date = DRIVER_DATE,
37 	.major = DRIVER_MAJOR,
38 	.minor = DRIVER_MINOR,
39 	.patchlevel = DRIVER_PATCHLEVEL,
40 	.gem_create_object = drm_gem_shmem_create_object_cached,
41 	DRM_GEM_SHMEM_DRIVER_OPS,
42 };
43 
44 /*
45  * DRM device
46  */
47 
mgag200_has_sgram(struct mga_device * mdev)48 static bool mgag200_has_sgram(struct mga_device *mdev)
49 {
50 	struct drm_device *dev = &mdev->base;
51 	u32 option;
52 	int ret;
53 
54 	ret = pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option);
55 	if (drm_WARN(dev, ret, "failed to read PCI config dword: %d\n", ret))
56 		return false;
57 
58 	return !!(option & PCI_MGA_OPTION_HARDPWMSK);
59 }
60 
mgag200_regs_init(struct mga_device * mdev)61 static int mgag200_regs_init(struct mga_device *mdev)
62 {
63 	struct drm_device *dev = &mdev->base;
64 	u32 option, option2;
65 	u8 crtcext3;
66 
67 	switch (mdev->type) {
68 	case G200_PCI:
69 	case G200_AGP:
70 		if (mgag200_has_sgram(mdev))
71 			option = 0x4049cd21;
72 		else
73 			option = 0x40499121;
74 		option2 = 0x00008000;
75 		break;
76 	case G200_SE_A:
77 	case G200_SE_B:
78 		option = 0x40049120;
79 		if (mgag200_has_sgram(mdev))
80 			option |= PCI_MGA_OPTION_HARDPWMSK;
81 		option2 = 0x00008000;
82 		break;
83 	case G200_WB:
84 	case G200_EW3:
85 		option = 0x41049120;
86 		option2 = 0x0000b000;
87 		break;
88 	case G200_EV:
89 		option = 0x00000120;
90 		option2 = 0x0000b000;
91 		break;
92 	case G200_EH:
93 	case G200_EH3:
94 		option = 0x00000120;
95 		option2 = 0x0000b000;
96 		break;
97 	default:
98 		option = 0;
99 		option2 = 0;
100 	}
101 
102 	if (option)
103 		pci_write_config_dword(dev->pdev, PCI_MGA_OPTION, option);
104 	if (option2)
105 		pci_write_config_dword(dev->pdev, PCI_MGA_OPTION2, option2);
106 
107 	/* BAR 1 contains registers */
108 	mdev->rmmio_base = pci_resource_start(dev->pdev, 1);
109 	mdev->rmmio_size = pci_resource_len(dev->pdev, 1);
110 
111 	if (!devm_request_mem_region(dev->dev, mdev->rmmio_base,
112 				     mdev->rmmio_size, "mgadrmfb_mmio")) {
113 		drm_err(dev, "can't reserve mmio registers\n");
114 		return -ENOMEM;
115 	}
116 
117 	mdev->rmmio = pcim_iomap(dev->pdev, 1, 0);
118 	if (mdev->rmmio == NULL)
119 		return -ENOMEM;
120 
121 	RREG_ECRT(0x03, crtcext3);
122 	crtcext3 |= MGAREG_CRTCEXT3_MGAMODE;
123 	WREG_ECRT(0x03, crtcext3);
124 
125 	return 0;
126 }
127 
mgag200_g200_interpret_bios(struct mga_device * mdev,const unsigned char * bios,size_t size)128 static void mgag200_g200_interpret_bios(struct mga_device *mdev,
129 					const unsigned char *bios,
130 					size_t size)
131 {
132 	static const char matrox[] = {'M', 'A', 'T', 'R', 'O', 'X'};
133 	static const unsigned int expected_length[6] = {
134 		0, 64, 64, 64, 128, 128
135 	};
136 	struct drm_device *dev = &mdev->base;
137 	const unsigned char *pins;
138 	unsigned int pins_len, version;
139 	int offset;
140 	int tmp;
141 
142 	/* Test for MATROX string. */
143 	if (size < 45 + sizeof(matrox))
144 		return;
145 	if (memcmp(&bios[45], matrox, sizeof(matrox)) != 0)
146 		return;
147 
148 	/* Get the PInS offset. */
149 	if (size < MGA_BIOS_OFFSET + 2)
150 		return;
151 	offset = (bios[MGA_BIOS_OFFSET + 1] << 8) | bios[MGA_BIOS_OFFSET];
152 
153 	/* Get PInS data structure. */
154 
155 	if (size < offset + 6)
156 		return;
157 	pins = bios + offset;
158 	if (pins[0] == 0x2e && pins[1] == 0x41) {
159 		version = pins[5];
160 		pins_len = pins[2];
161 	} else {
162 		version = 1;
163 		pins_len = pins[0] + (pins[1] << 8);
164 	}
165 
166 	if (version < 1 || version > 5) {
167 		drm_warn(dev, "Unknown BIOS PInS version: %d\n", version);
168 		return;
169 	}
170 	if (pins_len != expected_length[version]) {
171 		drm_warn(dev, "Unexpected BIOS PInS size: %d expected: %d\n",
172 			 pins_len, expected_length[version]);
173 		return;
174 	}
175 	if (size < offset + pins_len)
176 		return;
177 
178 	drm_dbg_kms(dev, "MATROX BIOS PInS version %d size: %d found\n",
179 		    version, pins_len);
180 
181 	/* Extract the clock values */
182 
183 	switch (version) {
184 	case 1:
185 		tmp = pins[24] + (pins[25] << 8);
186 		if (tmp)
187 			mdev->model.g200.pclk_max = tmp * 10;
188 		break;
189 	case 2:
190 		if (pins[41] != 0xff)
191 			mdev->model.g200.pclk_max = (pins[41] + 100) * 1000;
192 		break;
193 	case 3:
194 		if (pins[36] != 0xff)
195 			mdev->model.g200.pclk_max = (pins[36] + 100) * 1000;
196 		if (pins[52] & 0x20)
197 			mdev->model.g200.ref_clk = 14318;
198 		break;
199 	case 4:
200 		if (pins[39] != 0xff)
201 			mdev->model.g200.pclk_max = pins[39] * 4 * 1000;
202 		if (pins[92] & 0x01)
203 			mdev->model.g200.ref_clk = 14318;
204 		break;
205 	case 5:
206 		tmp = pins[4] ? 8000 : 6000;
207 		if (pins[123] != 0xff)
208 			mdev->model.g200.pclk_min = pins[123] * tmp;
209 		if (pins[38] != 0xff)
210 			mdev->model.g200.pclk_max = pins[38] * tmp;
211 		if (pins[110] & 0x01)
212 			mdev->model.g200.ref_clk = 14318;
213 		break;
214 	default:
215 		break;
216 	}
217 }
218 
mgag200_g200_init_refclk(struct mga_device * mdev)219 static void mgag200_g200_init_refclk(struct mga_device *mdev)
220 {
221 	struct drm_device *dev = &mdev->base;
222 	unsigned char __iomem *rom;
223 	unsigned char *bios;
224 	size_t size;
225 
226 	mdev->model.g200.pclk_min = 50000;
227 	mdev->model.g200.pclk_max = 230000;
228 	mdev->model.g200.ref_clk = 27050;
229 
230 	rom = pci_map_rom(dev->pdev, &size);
231 	if (!rom)
232 		return;
233 
234 	bios = vmalloc(size);
235 	if (!bios)
236 		goto out;
237 	memcpy_fromio(bios, rom, size);
238 
239 	if (size != 0 && bios[0] == 0x55 && bios[1] == 0xaa)
240 		mgag200_g200_interpret_bios(mdev, bios, size);
241 
242 	drm_dbg_kms(dev, "pclk_min: %ld pclk_max: %ld ref_clk: %ld\n",
243 		    mdev->model.g200.pclk_min, mdev->model.g200.pclk_max,
244 		    mdev->model.g200.ref_clk);
245 
246 	vfree(bios);
247 out:
248 	pci_unmap_rom(dev->pdev, rom);
249 }
250 
mgag200_g200se_init_unique_id(struct mga_device * mdev)251 static void mgag200_g200se_init_unique_id(struct mga_device *mdev)
252 {
253 	struct drm_device *dev = &mdev->base;
254 
255 	/* stash G200 SE model number for later use */
256 	mdev->model.g200se.unique_rev_id = RREG32(0x1e24);
257 
258 	drm_dbg(dev, "G200 SE unique revision id is 0x%x\n",
259 		mdev->model.g200se.unique_rev_id);
260 }
261 
mgag200_device_init(struct mga_device * mdev,unsigned long flags)262 static int mgag200_device_init(struct mga_device *mdev, unsigned long flags)
263 {
264 	struct drm_device *dev = &mdev->base;
265 	int ret;
266 
267 	mdev->flags = mgag200_flags_from_driver_data(flags);
268 	mdev->type = mgag200_type_from_driver_data(flags);
269 
270 	ret = mgag200_regs_init(mdev);
271 	if (ret)
272 		return ret;
273 
274 	if (mdev->type == G200_PCI || mdev->type == G200_AGP)
275 		mgag200_g200_init_refclk(mdev);
276 	else if (IS_G200_SE(mdev))
277 		mgag200_g200se_init_unique_id(mdev);
278 
279 	ret = mgag200_mm_init(mdev);
280 	if (ret)
281 		return ret;
282 
283 	ret = mgag200_modeset_init(mdev);
284 	if (ret) {
285 		drm_err(dev, "Fatal error during modeset init: %d\n", ret);
286 		return ret;
287 	}
288 
289 	return 0;
290 }
291 
292 static struct mga_device *
mgag200_device_create(struct pci_dev * pdev,unsigned long flags)293 mgag200_device_create(struct pci_dev *pdev, unsigned long flags)
294 {
295 	struct drm_device *dev;
296 	struct mga_device *mdev;
297 	int ret;
298 
299 	mdev = devm_drm_dev_alloc(&pdev->dev, &mgag200_driver,
300 				  struct mga_device, base);
301 	if (IS_ERR(mdev))
302 		return mdev;
303 	dev = &mdev->base;
304 
305 	dev->pdev = pdev;
306 	pci_set_drvdata(pdev, dev);
307 
308 	ret = mgag200_device_init(mdev, flags);
309 	if (ret)
310 		return ERR_PTR(ret);
311 
312 	return mdev;
313 }
314 
315 /*
316  * PCI driver
317  */
318 
319 static const struct pci_device_id mgag200_pciidlist[] = {
320 	{ PCI_VENDOR_ID_MATROX, 0x520, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_PCI },
321 	{ PCI_VENDOR_ID_MATROX, 0x521, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_AGP },
322 	{ PCI_VENDOR_ID_MATROX, 0x522, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
323 		G200_SE_A | MGAG200_FLAG_HW_BUG_NO_STARTADD},
324 	{ PCI_VENDOR_ID_MATROX, 0x524, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_B },
325 	{ PCI_VENDOR_ID_MATROX, 0x530, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EV },
326 	{ PCI_VENDOR_ID_MATROX, 0x532, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_WB },
327 	{ PCI_VENDOR_ID_MATROX, 0x533, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH },
328 	{ PCI_VENDOR_ID_MATROX, 0x534, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_ER },
329 	{ PCI_VENDOR_ID_MATROX, 0x536, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EW3 },
330 	{ PCI_VENDOR_ID_MATROX, 0x538, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH3 },
331 	{0,}
332 };
333 
334 MODULE_DEVICE_TABLE(pci, mgag200_pciidlist);
335 
336 static int
mgag200_pci_probe(struct pci_dev * pdev,const struct pci_device_id * ent)337 mgag200_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
338 {
339 	struct mga_device *mdev;
340 	struct drm_device *dev;
341 	int ret;
342 
343 	drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, "mgag200drmfb");
344 
345 	ret = pcim_enable_device(pdev);
346 	if (ret)
347 		return ret;
348 
349 	mdev = mgag200_device_create(pdev, ent->driver_data);
350 	if (IS_ERR(mdev))
351 		return PTR_ERR(mdev);
352 	dev = &mdev->base;
353 
354 	ret = drm_dev_register(dev, ent->driver_data);
355 	if (ret)
356 		return ret;
357 
358 	drm_fbdev_generic_setup(dev, 0);
359 
360 	return 0;
361 }
362 
mgag200_pci_remove(struct pci_dev * pdev)363 static void mgag200_pci_remove(struct pci_dev *pdev)
364 {
365 	struct drm_device *dev = pci_get_drvdata(pdev);
366 
367 	drm_dev_unregister(dev);
368 }
369 
370 static struct pci_driver mgag200_pci_driver = {
371 	.name = DRIVER_NAME,
372 	.id_table = mgag200_pciidlist,
373 	.probe = mgag200_pci_probe,
374 	.remove = mgag200_pci_remove,
375 };
376 
mgag200_init(void)377 static int __init mgag200_init(void)
378 {
379 	if (vgacon_text_force() && mgag200_modeset == -1)
380 		return -EINVAL;
381 
382 	if (mgag200_modeset == 0)
383 		return -EINVAL;
384 
385 	return pci_register_driver(&mgag200_pci_driver);
386 }
387 
mgag200_exit(void)388 static void __exit mgag200_exit(void)
389 {
390 	pci_unregister_driver(&mgag200_pci_driver);
391 }
392 
393 module_init(mgag200_init);
394 module_exit(mgag200_exit);
395 
396 MODULE_AUTHOR(DRIVER_AUTHOR);
397 MODULE_DESCRIPTION(DRIVER_DESC);
398 MODULE_LICENSE("GPL");
399