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1 | /* |
2 | * Copyright 2012 Red Hat Inc. | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice shall be included in | |
12 | * all copies or substantial portions of the Software. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
20 | * OTHER DEALINGS IN THE SOFTWARE. | |
21 | * | |
22 | * Authors: Ben Skeggs | |
23 | */ | |
24 | ||
70790f4f BS |
25 | #include <subdev/bios.h> |
26 | #include <subdev/bios/pll.h> | |
7c856522 | 27 | #include <subdev/timer.h> |
70790f4f BS |
28 | |
29 | #include "pll.h" | |
8aceb7de | 30 | |
7c856522 BS |
31 | #include "nva3.h" |
32 | ||
8aceb7de BS |
33 | struct nva3_clock_priv { |
34 | struct nouveau_clock base; | |
7c856522 | 35 | struct nva3_clock_info eng[nv_clk_src_max]; |
8aceb7de BS |
36 | }; |
37 | ||
7c856522 BS |
38 | static u32 read_clk(struct nva3_clock_priv *, int, bool); |
39 | static u32 read_pll(struct nva3_clock_priv *, int, u32); | |
40 | ||
41 | static u32 | |
42 | read_vco(struct nva3_clock_priv *priv, int clk) | |
43 | { | |
44 | u32 sctl = nv_rd32(priv, 0x4120 + (clk * 4)); | |
45 | if ((sctl & 0x00000030) != 0x00000030) | |
46 | return read_pll(priv, 0x41, 0x00e820); | |
47 | return read_pll(priv, 0x42, 0x00e8a0); | |
48 | } | |
49 | ||
50 | static u32 | |
51 | read_clk(struct nva3_clock_priv *priv, int clk, bool ignore_en) | |
52 | { | |
53 | u32 sctl, sdiv, sclk; | |
54 | ||
55 | /* refclk for the 0xe8xx plls is a fixed frequency */ | |
56 | if (clk >= 0x40) { | |
57 | if (nv_device(priv)->chipset == 0xaf) { | |
58 | /* no joke.. seriously.. sigh.. */ | |
59 | return nv_rd32(priv, 0x00471c) * 1000; | |
60 | } | |
61 | ||
62 | return nv_device(priv)->crystal; | |
63 | } | |
64 | ||
65 | sctl = nv_rd32(priv, 0x4120 + (clk * 4)); | |
66 | if (!ignore_en && !(sctl & 0x00000100)) | |
67 | return 0; | |
68 | ||
69 | switch (sctl & 0x00003000) { | |
70 | case 0x00000000: | |
71 | return nv_device(priv)->crystal; | |
72 | case 0x00002000: | |
73 | if (sctl & 0x00000040) | |
74 | return 108000; | |
75 | return 100000; | |
76 | case 0x00003000: | |
77 | sclk = read_vco(priv, clk); | |
78 | sdiv = ((sctl & 0x003f0000) >> 16) + 2; | |
79 | return (sclk * 2) / sdiv; | |
80 | default: | |
81 | return 0; | |
82 | } | |
83 | } | |
84 | ||
85 | static u32 | |
86 | read_pll(struct nva3_clock_priv *priv, int clk, u32 pll) | |
87 | { | |
88 | u32 ctrl = nv_rd32(priv, pll + 0); | |
89 | u32 sclk = 0, P = 1, N = 1, M = 1; | |
90 | ||
91 | if (!(ctrl & 0x00000008)) { | |
92 | if (ctrl & 0x00000001) { | |
93 | u32 coef = nv_rd32(priv, pll + 4); | |
94 | M = (coef & 0x000000ff) >> 0; | |
95 | N = (coef & 0x0000ff00) >> 8; | |
96 | P = (coef & 0x003f0000) >> 16; | |
97 | ||
98 | /* no post-divider on these.. */ | |
99 | if ((pll & 0x00ff00) == 0x00e800) | |
100 | P = 1; | |
101 | ||
102 | sclk = read_clk(priv, 0x00 + clk, false); | |
103 | } | |
104 | } else { | |
105 | sclk = read_clk(priv, 0x10 + clk, false); | |
106 | } | |
107 | ||
108 | if (M * P) | |
109 | return sclk * N / (M * P); | |
110 | return 0; | |
111 | } | |
112 | ||
113 | static int | |
114 | nva3_clock_read(struct nouveau_clock *clk, enum nv_clk_src src) | |
115 | { | |
116 | struct nva3_clock_priv *priv = (void *)clk; | |
117 | ||
118 | switch (src) { | |
119 | case nv_clk_src_crystal: | |
120 | return nv_device(priv)->crystal; | |
121 | case nv_clk_src_href: | |
122 | return 100000; | |
123 | case nv_clk_src_core: | |
124 | return read_pll(priv, 0x00, 0x4200); | |
125 | case nv_clk_src_shader: | |
126 | return read_pll(priv, 0x01, 0x4220); | |
127 | case nv_clk_src_mem: | |
128 | return read_pll(priv, 0x02, 0x4000); | |
129 | case nv_clk_src_disp: | |
130 | return read_clk(priv, 0x20, false); | |
131 | case nv_clk_src_vdec: | |
132 | return read_clk(priv, 0x21, false); | |
133 | case nv_clk_src_daemon: | |
134 | return read_clk(priv, 0x25, false); | |
135 | default: | |
136 | nv_error(clk, "invalid clock source %d\n", src); | |
137 | return -EINVAL; | |
138 | } | |
139 | } | |
140 | ||
d9c39056 | 141 | int |
7c856522 BS |
142 | nva3_clock_info(struct nouveau_clock *clock, int clk, u32 pll, u32 khz, |
143 | struct nva3_clock_info *info) | |
d9c39056 | 144 | { |
7c856522 BS |
145 | struct nouveau_bios *bios = nouveau_bios(clock); |
146 | struct nva3_clock_priv *priv = (void *)clock; | |
147 | struct nvbios_pll limits; | |
148 | u32 oclk, sclk, sdiv; | |
149 | int P, N, M, diff; | |
150 | int ret; | |
151 | ||
152 | info->pll = 0; | |
153 | info->clk = 0; | |
154 | ||
155 | switch (khz) { | |
156 | case 27000: | |
157 | info->clk = 0x00000100; | |
158 | return khz; | |
159 | case 100000: | |
160 | info->clk = 0x00002100; | |
161 | return khz; | |
162 | case 108000: | |
163 | info->clk = 0x00002140; | |
164 | return khz; | |
165 | default: | |
166 | sclk = read_vco(priv, clk); | |
167 | sdiv = min((sclk * 2) / (khz - 2999), (u32)65); | |
168 | /* if the clock has a PLL attached, and we can get a within | |
169 | * [-2, 3) MHz of a divider, we'll disable the PLL and use | |
170 | * the divider instead. | |
171 | * | |
172 | * divider can go as low as 2, limited here because NVIDIA | |
173 | * and the VBIOS on my NVA8 seem to prefer using the PLL | |
174 | * for 810MHz - is there a good reason? | |
175 | */ | |
176 | if (sdiv > 4) { | |
177 | oclk = (sclk * 2) / sdiv; | |
178 | diff = khz - oclk; | |
179 | if (!pll || (diff >= -2000 && diff < 3000)) { | |
180 | info->clk = (((sdiv - 2) << 16) | 0x00003100); | |
181 | return oclk; | |
182 | } | |
183 | } | |
184 | ||
185 | if (!pll) | |
186 | return -ERANGE; | |
187 | break; | |
188 | } | |
d9c39056 | 189 | |
7c856522 BS |
190 | ret = nvbios_pll_parse(bios, pll, &limits); |
191 | if (ret) | |
192 | return ret; | |
193 | ||
194 | limits.refclk = read_clk(priv, clk - 0x10, true); | |
195 | if (!limits.refclk) | |
196 | return -EINVAL; | |
d9c39056 | 197 | |
7c856522 BS |
198 | ret = nva3_pll_calc(nv_subdev(priv), &limits, khz, &N, NULL, &M, &P); |
199 | if (ret >= 0) { | |
200 | info->clk = nv_rd32(priv, 0x4120 + (clk * 4)); | |
201 | info->pll = (P << 16) | (N << 8) | M; | |
d9c39056 | 202 | } |
7c856522 BS |
203 | |
204 | return ret ? ret : -ERANGE; | |
205 | } | |
206 | ||
207 | static int | |
208 | calc_clk(struct nva3_clock_priv *priv, struct nouveau_cstate *cstate, | |
209 | int clk, u32 pll, int idx) | |
210 | { | |
211 | int ret = nva3_clock_info(&priv->base, clk, pll, cstate->domain[idx], | |
212 | &priv->eng[idx]); | |
213 | if (ret >= 0) | |
214 | return 0; | |
d9c39056 ML |
215 | return ret; |
216 | } | |
217 | ||
7c856522 BS |
218 | static void |
219 | prog_pll(struct nva3_clock_priv *priv, int clk, u32 pll, int idx) | |
220 | { | |
221 | struct nva3_clock_info *info = &priv->eng[idx]; | |
222 | const u32 src0 = 0x004120 + (clk * 4); | |
223 | const u32 src1 = 0x004160 + (clk * 4); | |
224 | const u32 ctrl = pll + 0; | |
225 | const u32 coef = pll + 4; | |
226 | ||
227 | if (info->pll) { | |
228 | nv_mask(priv, src0, 0x00000101, 0x00000101); | |
229 | nv_wr32(priv, coef, info->pll); | |
230 | nv_mask(priv, ctrl, 0x00000015, 0x00000015); | |
231 | nv_mask(priv, ctrl, 0x00000010, 0x00000000); | |
232 | nv_wait(priv, ctrl, 0x00020000, 0x00020000); | |
233 | nv_mask(priv, ctrl, 0x00000010, 0x00000010); | |
234 | nv_mask(priv, ctrl, 0x00000008, 0x00000000); | |
235 | nv_mask(priv, src1, 0x00000100, 0x00000000); | |
236 | nv_mask(priv, src1, 0x00000001, 0x00000000); | |
237 | } else { | |
238 | nv_mask(priv, src1, 0x003f3141, 0x00000101 | info->clk); | |
239 | nv_mask(priv, ctrl, 0x00000018, 0x00000018); | |
240 | udelay(20); | |
241 | nv_mask(priv, ctrl, 0x00000001, 0x00000000); | |
242 | nv_mask(priv, src0, 0x00000100, 0x00000000); | |
243 | nv_mask(priv, src0, 0x00000001, 0x00000000); | |
244 | } | |
245 | } | |
246 | ||
247 | static void | |
248 | prog_clk(struct nva3_clock_priv *priv, int clk, int idx) | |
249 | { | |
250 | struct nva3_clock_info *info = &priv->eng[idx]; | |
251 | nv_mask(priv, 0x004120 + (clk * 4), 0x003f3141, 0x00000101 | info->clk); | |
252 | } | |
253 | ||
254 | static int | |
255 | nva3_clock_calc(struct nouveau_clock *clk, struct nouveau_cstate *cstate) | |
256 | { | |
257 | struct nva3_clock_priv *priv = (void *)clk; | |
258 | int ret; | |
259 | ||
260 | if ((ret = calc_clk(priv, cstate, 0x10, 0x4200, nv_clk_src_core)) || | |
261 | (ret = calc_clk(priv, cstate, 0x11, 0x4220, nv_clk_src_shader)) || | |
262 | (ret = calc_clk(priv, cstate, 0x20, 0x0000, nv_clk_src_disp)) || | |
263 | (ret = calc_clk(priv, cstate, 0x21, 0x0000, nv_clk_src_vdec))) | |
264 | return ret; | |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
269 | static int | |
270 | nva3_clock_prog(struct nouveau_clock *clk) | |
271 | { | |
272 | struct nva3_clock_priv *priv = (void *)clk; | |
273 | prog_pll(priv, 0x00, 0x004200, nv_clk_src_core); | |
274 | prog_pll(priv, 0x01, 0x004220, nv_clk_src_shader); | |
275 | prog_clk(priv, 0x20, nv_clk_src_disp); | |
276 | prog_clk(priv, 0x21, nv_clk_src_vdec); | |
277 | return 0; | |
278 | } | |
279 | ||
280 | static void | |
281 | nva3_clock_tidy(struct nouveau_clock *clk) | |
282 | { | |
283 | } | |
284 | ||
285 | static struct nouveau_clocks | |
286 | nva3_domain[] = { | |
287 | { nv_clk_src_crystal, 0xff }, | |
288 | { nv_clk_src_href , 0xff }, | |
289 | { nv_clk_src_core , 0x00, 0, "core", 1000 }, | |
290 | { nv_clk_src_shader , 0x01, 0, "shader", 1000 }, | |
291 | { nv_clk_src_mem , 0x02, 0, "memory", 1000 }, | |
292 | { nv_clk_src_vdec , 0x03 }, | |
293 | { nv_clk_src_disp , 0x04 }, | |
294 | { nv_clk_src_max } | |
295 | }; | |
d9c39056 | 296 | |
8aceb7de BS |
297 | static int |
298 | nva3_clock_ctor(struct nouveau_object *parent, struct nouveau_object *engine, | |
299 | struct nouveau_oclass *oclass, void *data, u32 size, | |
300 | struct nouveau_object **pobject) | |
301 | { | |
302 | struct nva3_clock_priv *priv; | |
303 | int ret; | |
304 | ||
bb4d29df AC |
305 | ret = nouveau_clock_create(parent, engine, oclass, nva3_domain, NULL, 0, |
306 | false, &priv); | |
8aceb7de BS |
307 | *pobject = nv_object(priv); |
308 | if (ret) | |
309 | return ret; | |
310 | ||
7c856522 BS |
311 | priv->base.read = nva3_clock_read; |
312 | priv->base.calc = nva3_clock_calc; | |
313 | priv->base.prog = nva3_clock_prog; | |
314 | priv->base.tidy = nva3_clock_tidy; | |
8aceb7de BS |
315 | return 0; |
316 | } | |
317 | ||
318 | struct nouveau_oclass | |
319 | nva3_clock_oclass = { | |
320 | .handle = NV_SUBDEV(CLOCK, 0xa3), | |
321 | .ofuncs = &(struct nouveau_ofuncs) { | |
322 | .ctor = nva3_clock_ctor, | |
323 | .dtor = _nouveau_clock_dtor, | |
324 | .init = _nouveau_clock_init, | |
325 | .fini = _nouveau_clock_fini, | |
326 | }, | |
327 | }; |