Linux Kernel  3.7.1
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nva3.c
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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 
25 #include <subdev/clock.h>
26 #include <subdev/bios.h>
27 #include <subdev/bios/pll.h>
28 
29 #include "pll.h"
30 
33 };
34 
35 static int
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
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
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
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 };