1/* $NetBSD: nouveau_subdev_fb_gddr5.c,v 1.1.1.1 2014/08/06 12:36:30 riastradh Exp $ */
2
3/*
4 * Copyright 2013 Red Hat Inc.
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 COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs <bskeggs@redhat.com>
25 */
26
27#include <sys/cdefs.h>
28__KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_fb_gddr5.c,v 1.1.1.1 2014/08/06 12:36:30 riastradh Exp $");
29
30#include <subdev/bios.h>
31#include "priv.h"
32
33/* binary driver only executes this path if the condition (a) is true
34 * for any configuration (combination of rammap+ramcfg+timing) that
35 * can be reached on a given card. for now, we will execute the branch
36 * unconditionally in the hope that a "false everywhere" in the bios
37 * tables doesn't actually mean "don't touch this".
38 */
39#define NOTE00(a) 1
40
41int
42nouveau_gddr5_calc(struct nouveau_ram *ram, bool nuts)
43{
44 int pd, lf, xd, vh, vr, vo, l3;
45 int WL, CL, WR, at[2], dt, ds;
46 int rq = ram->freq < 1000000; /* XXX */
47
48 switch (ram->ramcfg.version) {
49 case 0x11:
50 pd = ram->next->bios.ramcfg_11_01_80;
51 lf = ram->next->bios.ramcfg_11_01_40;
52 xd = !ram->next->bios.ramcfg_11_01_20;
53 vh = ram->next->bios.ramcfg_11_02_10;
54 vr = ram->next->bios.ramcfg_11_02_04;
55 vo = ram->next->bios.ramcfg_11_06;
56 l3 = !ram->next->bios.ramcfg_11_07_02;
57 break;
58 default:
59 return -ENOSYS;
60 }
61
62 switch (ram->timing.version) {
63 case 0x20:
64 WL = (ram->next->bios.timing[1] & 0x00000f80) >> 7;
65 CL = (ram->next->bios.timing[1] & 0x0000001f);
66 WR = (ram->next->bios.timing[2] & 0x007f0000) >> 16;
67 at[0] = ram->next->bios.timing_20_2e_c0;
68 at[1] = ram->next->bios.timing_20_2e_30;
69 dt = ram->next->bios.timing_20_2e_03;
70 ds = ram->next->bios.timing_20_2f_03;
71 break;
72 default:
73 return -ENOSYS;
74 }
75
76 if (WL < 1 || WL > 7 || CL < 5 || CL > 36 || WR < 4 || WR > 35)
77 return -EINVAL;
78 CL -= 5;
79 WR -= 4;
80
81 ram->mr[0] &= ~0xf7f;
82 ram->mr[0] |= (WR & 0x0f) << 8;
83 ram->mr[0] |= (CL & 0x0f) << 3;
84 ram->mr[0] |= (WL & 0x07) << 0;
85
86 ram->mr[1] &= ~0x0bf;
87 ram->mr[1] |= (xd & 0x01) << 7;
88 ram->mr[1] |= (at[0] & 0x03) << 4;
89 ram->mr[1] |= (dt & 0x03) << 2;
90 ram->mr[1] |= (ds & 0x03) << 0;
91
92 /* this seems wrong, alternate field used for the broadcast
93 * on nuts vs non-nuts configs.. meh, it matches for now.
94 */
95 ram->mr1_nuts = ram->mr[1];
96 if (nuts) {
97 ram->mr[1] &= ~0x030;
98 ram->mr[1] |= (at[1] & 0x03) << 4;
99 }
100
101 ram->mr[3] &= ~0x020;
102 ram->mr[3] |= (rq & 0x01) << 5;
103
104 ram->mr[5] &= ~0x004;
105 ram->mr[5] |= (l3 << 2);
106
107 if (!vo)
108 vo = (ram->mr[6] & 0xff0) >> 4;
109 if (ram->mr[6] & 0x001)
110 pd = 1; /* binary driver does this.. bug? */
111 ram->mr[6] &= ~0xff1;
112 ram->mr[6] |= (vo & 0xff) << 4;
113 ram->mr[6] |= (pd & 0x01) << 0;
114
115 if (NOTE00(vr)) {
116 ram->mr[7] &= ~0x300;
117 ram->mr[7] |= (vr & 0x03) << 8;
118 }
119 ram->mr[7] &= ~0x088;
120 ram->mr[7] |= (vh & 0x01) << 7;
121 ram->mr[7] |= (lf & 0x01) << 3;
122
123 ram->mr[8] &= ~0x003;
124 ram->mr[8] |= (WR & 0x10) >> 3;
125 ram->mr[8] |= (CL & 0x10) >> 4;
126 return 0;
127}
128