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1/*2 * Copyright 2013 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * 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 true27 * for any configuration (combination of rammap+ramcfg+timing) that28 * can be reached on a given card. for now, we will execute the branch29 * unconditionally in the hope that a "false everywhere" in the bios30 * tables doesn't actually mean "don't touch this".31 */32#define NOTE00(a) 133 34int35nvkm_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 broadcast87 * 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