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
25 #include <subdev/clock.h>
26 #include <subdev/bios.h>
27 #include <subdev/bios/pll.h>
28
29 #include "pll.h"
30
31 struct nva3_clock_priv {
32 struct nouveau_clock base;
33 };
34
35 static int
nva3_clock_pll_set(struct nouveau_clock * clk,u32 type,u32 freq)36 nva3_clock_pll_set(struct nouveau_clock *clk, u32 type, u32 freq)
37 {
38 struct nva3_clock_priv *priv = (void *)clk;
39 struct nouveau_bios *bios = nouveau_bios(priv);
40 struct nvbios_pll info;
41 int N, fN, M, P;
42 int ret;
43
44 ret = nvbios_pll_parse(bios, type, &info);
45 if (ret)
46 return ret;
47
48 ret = nva3_pll_calc(clk, &info, freq, &N, &fN, &M, &P);
49 if (ret < 0)
50 return ret;
51
52 switch (info.type) {
53 case PLL_VPLL0:
54 case PLL_VPLL1:
55 nv_wr32(priv, info.reg + 0, 0x50000610);
56 nv_mask(priv, info.reg + 4, 0x003fffff,
57 (P << 16) | (M << 8) | N);
58 nv_wr32(priv, info.reg + 8, fN);
59 break;
60 default:
61 nv_warn(priv, "0x%08x/%dKhz unimplemented\n", type, freq);
62 ret = -EINVAL;
63 break;
64 }
65
66 return ret;
67 }
68
69 int
nva3_clock_pll_calc(struct nouveau_clock * clock,struct nvbios_pll * info,int clk,struct nouveau_pll_vals * pv)70 nva3_clock_pll_calc(struct nouveau_clock *clock, struct nvbios_pll *info,
71 int clk, struct nouveau_pll_vals *pv)
72 {
73 int ret, N, M, P;
74
75 ret = nva3_pll_calc(clock, info, clk, &N, NULL, &M, &P);
76
77 if (ret > 0) {
78 pv->refclk = info->refclk;
79 pv->N1 = N;
80 pv->M1 = M;
81 pv->log2P = P;
82 }
83 return ret;
84 }
85
86
87 static int
nva3_clock_ctor(struct nouveau_object * parent,struct nouveau_object * engine,struct nouveau_oclass * oclass,void * data,u32 size,struct nouveau_object ** pobject)88 nva3_clock_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
89 struct nouveau_oclass *oclass, void *data, u32 size,
90 struct nouveau_object **pobject)
91 {
92 struct nva3_clock_priv *priv;
93 int ret;
94
95 ret = nouveau_clock_create(parent, engine, oclass, &priv);
96 *pobject = nv_object(priv);
97 if (ret)
98 return ret;
99
100 priv->base.pll_set = nva3_clock_pll_set;
101 priv->base.pll_calc = nva3_clock_pll_calc;
102 return 0;
103 }
104
105 struct nouveau_oclass
106 nva3_clock_oclass = {
107 .handle = NV_SUBDEV(CLOCK, 0xa3),
108 .ofuncs = &(struct nouveau_ofuncs) {
109 .ctor = nva3_clock_ctor,
110 .dtor = _nouveau_clock_dtor,
111 .init = _nouveau_clock_init,
112 .fini = _nouveau_clock_fini,
113 },
114 };
115