| 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 | |
| 41 | int |
| 42 | nouveau_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 | |