1 /* 2 * Copyright 2013 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 <bskeggs@redhat.com> 23 */ 24 #include "ram.h" 25 26 /* binary driver only executes this path if the condition (a) is true 27 * for any configuration (combination of rammap+ramcfg+timing) that 28 * can be reached on a given card. for now, we will execute the branch 29 * unconditionally in the hope that a "false everywhere" in the bios 30 * tables doesn't actually mean "don't touch this". 31 */ 32 #define NOTE00(a) 1 33 34 int 35 nvkm_gddr5_calc(struct nvkm_ram *ram, bool nuts) 36 { 37 int pd, lf, xd, vh, vr, vo, l3; 38 int WL, CL, WR, at[2], dt, ds; 39 int rq = ram->freq < 1000000; /* XXX */ 40 41 xd = !ram->next->bios.ramcfg_DLLoff; 42 43 switch (ram->next->bios.ramcfg_ver) { 44 case 0x11: 45 pd = ram->next->bios.ramcfg_11_01_80; 46 lf = ram->next->bios.ramcfg_11_01_40; 47 vh = ram->next->bios.ramcfg_11_02_10; 48 vr = ram->next->bios.ramcfg_11_02_04; 49 vo = ram->next->bios.ramcfg_11_06; 50 l3 = !ram->next->bios.ramcfg_11_07_02; 51 break; 52 default: 53 return -ENOSYS; 54 } 55 56 switch (ram->next->bios.timing_ver) { 57 case 0x20: 58 WL = (ram->next->bios.timing[1] & 0x00000f80) >> 7; 59 CL = (ram->next->bios.timing[1] & 0x0000001f); 60 WR = (ram->next->bios.timing[2] & 0x007f0000) >> 16; 61 at[0] = ram->next->bios.timing_20_2e_c0; 62 at[1] = ram->next->bios.timing_20_2e_30; 63 dt = ram->next->bios.timing_20_2e_03; 64 ds = ram->next->bios.timing_20_2f_03; 65 break; 66 default: 67 return -ENOSYS; 68 } 69 70 if (WL < 1 || WL > 7 || CL < 5 || CL > 36 || WR < 4 || WR > 35) 71 return -EINVAL; 72 CL -= 5; 73 WR -= 4; 74 75 ram->mr[0] &= ~0xf7f; 76 ram->mr[0] |= (WR & 0x0f) << 8; 77 ram->mr[0] |= (CL & 0x0f) << 3; 78 ram->mr[0] |= (WL & 0x07) << 0; 79 80 ram->mr[1] &= ~0x0bf; 81 ram->mr[1] |= (xd & 0x01) << 7; 82 ram->mr[1] |= (at[0] & 0x03) << 4; 83 ram->mr[1] |= (dt & 0x03) << 2; 84 ram->mr[1] |= (ds & 0x03) << 0; 85 86 /* this seems wrong, alternate field used for the broadcast 87 * on nuts vs non-nuts configs.. meh, it matches for now. 88 */ 89 ram->mr1_nuts = ram->mr[1]; 90 if (nuts) { 91 ram->mr[1] &= ~0x030; 92 ram->mr[1] |= (at[1] & 0x03) << 4; 93 } 94 95 ram->mr[3] &= ~0x020; 96 ram->mr[3] |= (rq & 0x01) << 5; 97 98 ram->mr[5] &= ~0x004; 99 ram->mr[5] |= (l3 << 2); 100 101 if (!vo) 102 vo = (ram->mr[6] & 0xff0) >> 4; 103 if (ram->mr[6] & 0x001) 104 pd = 1; /* binary driver does this.. bug? */ 105 ram->mr[6] &= ~0xff1; 106 ram->mr[6] |= (vo & 0xff) << 4; 107 ram->mr[6] |= (pd & 0x01) << 0; 108 109 if (NOTE00(vr)) { 110 ram->mr[7] &= ~0x300; 111 ram->mr[7] |= (vr & 0x03) << 8; 112 } 113 ram->mr[7] &= ~0x088; 114 ram->mr[7] |= (vh & 0x01) << 7; 115 ram->mr[7] |= (lf & 0x01) << 3; 116 117 ram->mr[8] &= ~0x003; 118 ram->mr[8] |= (WR & 0x10) >> 3; 119 ram->mr[8] |= (CL & 0x10) >> 4; 120 return 0; 121 } 122