122 lines
3.6 KiB
C
122 lines
3.6 KiB
C
/*
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* Copyright 2013 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Ben Skeggs <bskeggs@redhat.com>
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*/
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#include "ram.h"
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/* binary driver only executes this path if the condition (a) is true
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* for any configuration (combination of rammap+ramcfg+timing) that
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* can be reached on a given card. for now, we will execute the branch
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* unconditionally in the hope that a "false everywhere" in the bios
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* tables doesn't actually mean "don't touch this".
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*/
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#define NOTE00(a) 1
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int
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nvkm_gddr5_calc(struct nvkm_ram *ram, bool nuts)
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{
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int pd, lf, xd, vh, vr, vo, l3;
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int WL, CL, WR, at[2], dt, ds;
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int rq = ram->freq < 1000000; /* XXX */
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xd = !ram->next->bios.ramcfg_DLLoff;
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switch (ram->next->bios.ramcfg_ver) {
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case 0x11:
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pd = ram->next->bios.ramcfg_11_01_80;
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lf = ram->next->bios.ramcfg_11_01_40;
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vh = ram->next->bios.ramcfg_11_02_10;
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vr = ram->next->bios.ramcfg_11_02_04;
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vo = ram->next->bios.ramcfg_11_06;
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l3 = !ram->next->bios.ramcfg_11_07_02;
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break;
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default:
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return -ENOSYS;
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}
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switch (ram->next->bios.timing_ver) {
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case 0x20:
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WL = (ram->next->bios.timing[1] & 0x00000f80) >> 7;
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CL = (ram->next->bios.timing[1] & 0x0000001f);
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WR = (ram->next->bios.timing[2] & 0x007f0000) >> 16;
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at[0] = ram->next->bios.timing_20_2e_c0;
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at[1] = ram->next->bios.timing_20_2e_30;
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dt = ram->next->bios.timing_20_2e_03;
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ds = ram->next->bios.timing_20_2f_03;
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break;
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default:
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return -ENOSYS;
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}
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if (WL < 1 || WL > 7 || CL < 5 || CL > 36 || WR < 4 || WR > 35)
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return -EINVAL;
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CL -= 5;
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WR -= 4;
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ram->mr[0] &= ~0xf7f;
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ram->mr[0] |= (WR & 0x0f) << 8;
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ram->mr[0] |= (CL & 0x0f) << 3;
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ram->mr[0] |= (WL & 0x07) << 0;
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ram->mr[1] &= ~0x0bf;
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ram->mr[1] |= (xd & 0x01) << 7;
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ram->mr[1] |= (at[0] & 0x03) << 4;
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ram->mr[1] |= (dt & 0x03) << 2;
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ram->mr[1] |= (ds & 0x03) << 0;
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/* this seems wrong, alternate field used for the broadcast
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* on nuts vs non-nuts configs.. meh, it matches for now.
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*/
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ram->mr1_nuts = ram->mr[1];
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if (nuts) {
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ram->mr[1] &= ~0x030;
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ram->mr[1] |= (at[1] & 0x03) << 4;
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}
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ram->mr[3] &= ~0x020;
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ram->mr[3] |= (rq & 0x01) << 5;
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ram->mr[5] &= ~0x004;
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ram->mr[5] |= (l3 << 2);
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if (!vo)
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vo = (ram->mr[6] & 0xff0) >> 4;
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if (ram->mr[6] & 0x001)
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pd = 1; /* binary driver does this.. bug? */
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ram->mr[6] &= ~0xff1;
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ram->mr[6] |= (vo & 0xff) << 4;
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ram->mr[6] |= (pd & 0x01) << 0;
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if (NOTE00(vr)) {
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ram->mr[7] &= ~0x300;
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ram->mr[7] |= (vr & 0x03) << 8;
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}
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ram->mr[7] &= ~0x088;
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ram->mr[7] |= (vh & 0x01) << 7;
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ram->mr[7] |= (lf & 0x01) << 3;
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ram->mr[8] &= ~0x003;
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ram->mr[8] |= (WR & 0x10) >> 3;
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ram->mr[8] |= (CL & 0x10) >> 4;
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return 0;
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}
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