1 /*
2  * Copyright 2005-2006 Erik Waling
3  * Copyright 2006 Stephane Marchesin
4  * Copyright 2007-2009 Stuart Bennett
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19  * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
21  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22  * SOFTWARE.
23  */
24 #include <subdev/bios.h>
25 #include <subdev/bios/bit.h>
26 #include <subdev/bios/bmp.h>
27 #include <subdev/bios/pll.h>
28 #include <subdev/vga.h>
29 
30 
31 struct pll_mapping {
32 	u8  type;
33 	u32 reg;
34 };
35 
36 static struct pll_mapping
37 nv04_pll_mapping[] = {
38 	{ PLL_CORE  , 0x680500 },
39 	{ PLL_MEMORY, 0x680504 },
40 	{ PLL_VPLL0 , 0x680508 },
41 	{ PLL_VPLL1 , 0x680520 },
42 	{}
43 };
44 
45 static struct pll_mapping
46 nv40_pll_mapping[] = {
47 	{ PLL_CORE  , 0x004000 },
48 	{ PLL_MEMORY, 0x004020 },
49 	{ PLL_VPLL0 , 0x680508 },
50 	{ PLL_VPLL1 , 0x680520 },
51 	{}
52 };
53 
54 static struct pll_mapping
55 nv50_pll_mapping[] = {
56 	{ PLL_CORE  , 0x004028 },
57 	{ PLL_SHADER, 0x004020 },
58 	{ PLL_UNK03 , 0x004000 },
59 	{ PLL_MEMORY, 0x004008 },
60 	{ PLL_UNK40 , 0x00e810 },
61 	{ PLL_UNK41 , 0x00e818 },
62 	{ PLL_UNK42 , 0x00e824 },
63 	{ PLL_VPLL0 , 0x614100 },
64 	{ PLL_VPLL1 , 0x614900 },
65 	{}
66 };
67 
68 static struct pll_mapping
69 g84_pll_mapping[] = {
70 	{ PLL_CORE  , 0x004028 },
71 	{ PLL_SHADER, 0x004020 },
72 	{ PLL_MEMORY, 0x004008 },
73 	{ PLL_VDEC  , 0x004030 },
74 	{ PLL_UNK41 , 0x00e818 },
75 	{ PLL_VPLL0 , 0x614100 },
76 	{ PLL_VPLL1 , 0x614900 },
77 	{}
78 };
79 
80 static u32
pll_limits_table(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)81 pll_limits_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
82 {
83 	struct bit_entry bit_C;
84 	u32 data = 0x0000;
85 
86 	if (!bit_entry(bios, 'C', &bit_C)) {
87 		if (bit_C.version == 1 && bit_C.length >= 10)
88 			data = nvbios_rd16(bios, bit_C.offset + 8);
89 		if (bit_C.version == 2 && bit_C.length >= 4)
90 			data = nvbios_rd32(bios, bit_C.offset + 0);
91 		if (data) {
92 			*ver = nvbios_rd08(bios, data + 0);
93 			*hdr = nvbios_rd08(bios, data + 1);
94 			*len = nvbios_rd08(bios, data + 2);
95 			*cnt = nvbios_rd08(bios, data + 3);
96 			return data;
97 		}
98 	}
99 
100 	if (bmp_version(bios) >= 0x0524) {
101 		data = nvbios_rd16(bios, bios->bmp_offset + 142);
102 		if (data) {
103 			*ver = nvbios_rd08(bios, data + 0);
104 			*hdr = 1;
105 			*cnt = 1;
106 			*len = 0x18;
107 			return data;
108 		}
109 	}
110 
111 	*ver = 0x00;
112 	return data;
113 }
114 
115 static struct pll_mapping *
pll_map(struct nvkm_bios * bios)116 pll_map(struct nvkm_bios *bios)
117 {
118 	struct nvkm_device *device = bios->subdev.device;
119 	switch (device->card_type) {
120 	case NV_04:
121 	case NV_10:
122 	case NV_11:
123 	case NV_20:
124 	case NV_30:
125 		return nv04_pll_mapping;
126 	case NV_40:
127 		return nv40_pll_mapping;
128 	case NV_50:
129 		if (device->chipset == 0x50)
130 			return nv50_pll_mapping;
131 		else
132 		if (device->chipset <  0xa3 ||
133 		    device->chipset == 0xaa ||
134 		    device->chipset == 0xac)
135 			return g84_pll_mapping;
136 		fallthrough;
137 	default:
138 		return NULL;
139 	}
140 }
141 
142 static u32
pll_map_reg(struct nvkm_bios * bios,u32 reg,u32 * type,u8 * ver,u8 * len)143 pll_map_reg(struct nvkm_bios *bios, u32 reg, u32 *type, u8 *ver, u8 *len)
144 {
145 	struct pll_mapping *map;
146 	u8  hdr, cnt;
147 	u32 data;
148 
149 	data = pll_limits_table(bios, ver, &hdr, &cnt, len);
150 	if (data && *ver >= 0x30) {
151 		data += hdr;
152 		while (cnt--) {
153 			if (nvbios_rd32(bios, data + 3) == reg) {
154 				*type = nvbios_rd08(bios, data + 0);
155 				return data;
156 			}
157 			data += *len;
158 		}
159 		return 0x0000;
160 	}
161 
162 	map = pll_map(bios);
163 	while (map && map->reg) {
164 		if (map->reg == reg && *ver >= 0x20) {
165 			u32 addr = (data += hdr);
166 			*type = map->type;
167 			while (cnt--) {
168 				if (nvbios_rd32(bios, data) == map->reg)
169 					return data;
170 				data += *len;
171 			}
172 			return addr;
173 		} else
174 		if (map->reg == reg) {
175 			*type = map->type;
176 			return data + 1;
177 		}
178 		map++;
179 	}
180 
181 	return 0x0000;
182 }
183 
184 static u32
pll_map_type(struct nvkm_bios * bios,u8 type,u32 * reg,u8 * ver,u8 * len)185 pll_map_type(struct nvkm_bios *bios, u8 type, u32 *reg, u8 *ver, u8 *len)
186 {
187 	struct pll_mapping *map;
188 	u8  hdr, cnt;
189 	u32 data;
190 
191 	data = pll_limits_table(bios, ver, &hdr, &cnt, len);
192 	if (data && *ver >= 0x30) {
193 		data += hdr;
194 		while (cnt--) {
195 			if (nvbios_rd08(bios, data + 0) == type) {
196 				if (*ver < 0x50)
197 					*reg = nvbios_rd32(bios, data + 3);
198 				else
199 					*reg = 0;
200 				return data;
201 			}
202 			data += *len;
203 		}
204 		return 0x0000;
205 	}
206 
207 	map = pll_map(bios);
208 	while (map && map->reg) {
209 		if (map->type == type && *ver >= 0x20) {
210 			u32 addr = (data += hdr);
211 			*reg = map->reg;
212 			while (cnt--) {
213 				if (nvbios_rd32(bios, data) == map->reg)
214 					return data;
215 				data += *len;
216 			}
217 			return addr;
218 		} else
219 		if (map->type == type) {
220 			*reg = map->reg;
221 			return data + 1;
222 		}
223 		map++;
224 	}
225 
226 	return 0x0000;
227 }
228 
229 int
nvbios_pll_parse(struct nvkm_bios * bios,u32 type,struct nvbios_pll * info)230 nvbios_pll_parse(struct nvkm_bios *bios, u32 type, struct nvbios_pll *info)
231 {
232 	struct nvkm_subdev *subdev = &bios->subdev;
233 	struct nvkm_device *device = subdev->device;
234 	u8  ver, len;
235 	u32 reg = type;
236 	u32 data;
237 
238 	if (type > PLL_MAX) {
239 		reg  = type;
240 		data = pll_map_reg(bios, reg, &type, &ver, &len);
241 	} else {
242 		data = pll_map_type(bios, type, &reg, &ver, &len);
243 	}
244 
245 	if (ver && !data)
246 		return -ENOENT;
247 
248 	memset(info, 0, sizeof(*info));
249 	info->type = type;
250 	info->reg = reg;
251 
252 	switch (ver) {
253 	case 0x00:
254 		break;
255 	case 0x10:
256 	case 0x11:
257 		info->vco1.min_freq = nvbios_rd32(bios, data + 0);
258 		info->vco1.max_freq = nvbios_rd32(bios, data + 4);
259 		info->vco2.min_freq = nvbios_rd32(bios, data + 8);
260 		info->vco2.max_freq = nvbios_rd32(bios, data + 12);
261 		info->vco1.min_inputfreq = nvbios_rd32(bios, data + 16);
262 		info->vco2.min_inputfreq = nvbios_rd32(bios, data + 20);
263 		info->vco1.max_inputfreq = INT_MAX;
264 		info->vco2.max_inputfreq = INT_MAX;
265 
266 		info->max_p = 0x7;
267 		info->max_p_usable = 0x6;
268 
269 		/* these values taken from nv30/31/36 */
270 		switch (bios->version.chip) {
271 		case 0x36:
272 			info->vco1.min_n = 0x5;
273 			break;
274 		default:
275 			info->vco1.min_n = 0x1;
276 			break;
277 		}
278 		info->vco1.max_n = 0xff;
279 		info->vco1.min_m = 0x1;
280 		info->vco1.max_m = 0xd;
281 
282 		/*
283 		 * On nv30, 31, 36 (i.e. all cards with two stage PLLs with this
284 		 * table version (apart from nv35)), N2 is compared to
285 		 * maxN2 (0x46) and 10 * maxM2 (0x4), so set maxN2 to 0x28 and
286 		 * save a comparison
287 		 */
288 		info->vco2.min_n = 0x4;
289 		switch (bios->version.chip) {
290 		case 0x30:
291 		case 0x35:
292 			info->vco2.max_n = 0x1f;
293 			break;
294 		default:
295 			info->vco2.max_n = 0x28;
296 			break;
297 		}
298 		info->vco2.min_m = 0x1;
299 		info->vco2.max_m = 0x4;
300 		break;
301 	case 0x20:
302 	case 0x21:
303 		info->vco1.min_freq = nvbios_rd16(bios, data + 4) * 1000;
304 		info->vco1.max_freq = nvbios_rd16(bios, data + 6) * 1000;
305 		info->vco2.min_freq = nvbios_rd16(bios, data + 8) * 1000;
306 		info->vco2.max_freq = nvbios_rd16(bios, data + 10) * 1000;
307 		info->vco1.min_inputfreq = nvbios_rd16(bios, data + 12) * 1000;
308 		info->vco2.min_inputfreq = nvbios_rd16(bios, data + 14) * 1000;
309 		info->vco1.max_inputfreq = nvbios_rd16(bios, data + 16) * 1000;
310 		info->vco2.max_inputfreq = nvbios_rd16(bios, data + 18) * 1000;
311 		info->vco1.min_n = nvbios_rd08(bios, data + 20);
312 		info->vco1.max_n = nvbios_rd08(bios, data + 21);
313 		info->vco1.min_m = nvbios_rd08(bios, data + 22);
314 		info->vco1.max_m = nvbios_rd08(bios, data + 23);
315 		info->vco2.min_n = nvbios_rd08(bios, data + 24);
316 		info->vco2.max_n = nvbios_rd08(bios, data + 25);
317 		info->vco2.min_m = nvbios_rd08(bios, data + 26);
318 		info->vco2.max_m = nvbios_rd08(bios, data + 27);
319 
320 		info->max_p = nvbios_rd08(bios, data + 29);
321 		info->max_p_usable = info->max_p;
322 		if (bios->version.chip < 0x60)
323 			info->max_p_usable = 0x6;
324 		info->bias_p = nvbios_rd08(bios, data + 30);
325 
326 		if (len > 0x22)
327 			info->refclk = nvbios_rd32(bios, data + 31);
328 		break;
329 	case 0x30:
330 		data = nvbios_rd16(bios, data + 1);
331 
332 		info->vco1.min_freq = nvbios_rd16(bios, data + 0) * 1000;
333 		info->vco1.max_freq = nvbios_rd16(bios, data + 2) * 1000;
334 		info->vco2.min_freq = nvbios_rd16(bios, data + 4) * 1000;
335 		info->vco2.max_freq = nvbios_rd16(bios, data + 6) * 1000;
336 		info->vco1.min_inputfreq = nvbios_rd16(bios, data + 8) * 1000;
337 		info->vco2.min_inputfreq = nvbios_rd16(bios, data + 10) * 1000;
338 		info->vco1.max_inputfreq = nvbios_rd16(bios, data + 12) * 1000;
339 		info->vco2.max_inputfreq = nvbios_rd16(bios, data + 14) * 1000;
340 		info->vco1.min_n = nvbios_rd08(bios, data + 16);
341 		info->vco1.max_n = nvbios_rd08(bios, data + 17);
342 		info->vco1.min_m = nvbios_rd08(bios, data + 18);
343 		info->vco1.max_m = nvbios_rd08(bios, data + 19);
344 		info->vco2.min_n = nvbios_rd08(bios, data + 20);
345 		info->vco2.max_n = nvbios_rd08(bios, data + 21);
346 		info->vco2.min_m = nvbios_rd08(bios, data + 22);
347 		info->vco2.max_m = nvbios_rd08(bios, data + 23);
348 		info->max_p_usable = info->max_p = nvbios_rd08(bios, data + 25);
349 		info->bias_p = nvbios_rd08(bios, data + 27);
350 		info->refclk = nvbios_rd32(bios, data + 28);
351 		break;
352 	case 0x40:
353 		info->refclk = nvbios_rd16(bios, data + 9) * 1000;
354 		data = nvbios_rd16(bios, data + 1);
355 
356 		info->vco1.min_freq = nvbios_rd16(bios, data + 0) * 1000;
357 		info->vco1.max_freq = nvbios_rd16(bios, data + 2) * 1000;
358 		info->vco1.min_inputfreq = nvbios_rd16(bios, data + 4) * 1000;
359 		info->vco1.max_inputfreq = nvbios_rd16(bios, data + 6) * 1000;
360 		info->vco1.min_m = nvbios_rd08(bios, data + 8);
361 		info->vco1.max_m = nvbios_rd08(bios, data + 9);
362 		info->vco1.min_n = nvbios_rd08(bios, data + 10);
363 		info->vco1.max_n = nvbios_rd08(bios, data + 11);
364 		info->min_p = nvbios_rd08(bios, data + 12);
365 		info->max_p = nvbios_rd08(bios, data + 13);
366 		break;
367 	case 0x50:
368 		info->refclk = nvbios_rd16(bios, data + 1) * 1000;
369 		/* info->refclk_alt = nvbios_rd16(bios, data + 3) * 1000; */
370 		info->vco1.min_freq = nvbios_rd16(bios, data + 5) * 1000;
371 		info->vco1.max_freq = nvbios_rd16(bios, data + 7) * 1000;
372 		info->vco1.min_inputfreq = nvbios_rd16(bios, data + 9) * 1000;
373 		info->vco1.max_inputfreq = nvbios_rd16(bios, data + 11) * 1000;
374 		info->vco1.min_m = nvbios_rd08(bios, data + 13);
375 		info->vco1.max_m = nvbios_rd08(bios, data + 14);
376 		info->vco1.min_n = nvbios_rd08(bios, data + 15);
377 		info->vco1.max_n = nvbios_rd08(bios, data + 16);
378 		info->min_p = nvbios_rd08(bios, data + 17);
379 		info->max_p = nvbios_rd08(bios, data + 18);
380 		break;
381 	default:
382 		nvkm_error(subdev, "unknown pll limits version 0x%02x\n", ver);
383 		return -EINVAL;
384 	}
385 
386 	if (!info->refclk) {
387 		info->refclk = device->crystal;
388 		if (bios->version.chip == 0x51) {
389 			u32 sel_clk = nvkm_rd32(device, 0x680524);
390 			if ((info->reg == 0x680508 && sel_clk & 0x20) ||
391 			    (info->reg == 0x680520 && sel_clk & 0x80)) {
392 				if (nvkm_rdvgac(device, 0, 0x27) < 0xa3)
393 					info->refclk = 200000;
394 				else
395 					info->refclk = 25000;
396 			}
397 		}
398 	}
399 
400 	/*
401 	 * By now any valid limit table ought to have set a max frequency for
402 	 * vco1, so if it's zero it's either a pre limit table bios, or one
403 	 * with an empty limit table (seen on nv18)
404 	 */
405 	if (!info->vco1.max_freq) {
406 		info->vco1.max_freq = nvbios_rd32(bios, bios->bmp_offset + 67);
407 		info->vco1.min_freq = nvbios_rd32(bios, bios->bmp_offset + 71);
408 		if (bmp_version(bios) < 0x0506) {
409 			info->vco1.max_freq = 256000;
410 			info->vco1.min_freq = 128000;
411 		}
412 
413 		info->vco1.min_inputfreq = 0;
414 		info->vco1.max_inputfreq = INT_MAX;
415 		info->vco1.min_n = 0x1;
416 		info->vco1.max_n = 0xff;
417 		info->vco1.min_m = 0x1;
418 
419 		if (device->crystal == 13500) {
420 			/* nv05 does this, nv11 doesn't, nv10 unknown */
421 			if (bios->version.chip < 0x11)
422 				info->vco1.min_m = 0x7;
423 			info->vco1.max_m = 0xd;
424 		} else {
425 			if (bios->version.chip < 0x11)
426 				info->vco1.min_m = 0x8;
427 			info->vco1.max_m = 0xe;
428 		}
429 
430 		if (bios->version.chip <  0x17 ||
431 		    bios->version.chip == 0x1a ||
432 		    bios->version.chip == 0x20)
433 			info->max_p = 4;
434 		else
435 			info->max_p = 5;
436 		info->max_p_usable = info->max_p;
437 	}
438 
439 	return 0;
440 }
441