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Diffstat (limited to 'nvkm/subdev/clock/pllnv04.c')
-rw-r--r--nvkm/subdev/clock/pllnv04.c246
1 files changed, 0 insertions, 246 deletions
diff --git a/nvkm/subdev/clock/pllnv04.c b/nvkm/subdev/clock/pllnv04.c
deleted file mode 100644
index b47d543ab..000000000
--- a/nvkm/subdev/clock/pllnv04.c
+++ /dev/null
@@ -1,246 +0,0 @@
-/*
- * Copyright 1993-2003 NVIDIA, Corporation
- * Copyright 2007-2009 Stuart Bennett
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#include <subdev/bios.h>
-#include <subdev/bios/pll.h>
-
-#include "pll.h"
-
-static int
-getMNP_single(struct nouveau_subdev *subdev, struct nvbios_pll *info, int clk,
- int *pN, int *pM, int *pP)
-{
- /* Find M, N and P for a single stage PLL
- *
- * Note that some bioses (NV3x) have lookup tables of precomputed MNP
- * values, but we're too lazy to use those atm
- *
- * "clk" parameter in kHz
- * returns calculated clock
- */
- struct nouveau_bios *bios = nouveau_bios(subdev);
- int minvco = info->vco1.min_freq, maxvco = info->vco1.max_freq;
- int minM = info->vco1.min_m, maxM = info->vco1.max_m;
- int minN = info->vco1.min_n, maxN = info->vco1.max_n;
- int minU = info->vco1.min_inputfreq;
- int maxU = info->vco1.max_inputfreq;
- int minP = info->min_p;
- int maxP = info->max_p_usable;
- int crystal = info->refclk;
- int M, N, thisP, P;
- int clkP, calcclk;
- int delta, bestdelta = INT_MAX;
- int bestclk = 0;
-
- /* this division verified for nv20, nv18, nv28 (Haiku), and nv34 */
- /* possibly correlated with introduction of 27MHz crystal */
- if (bios->version.major < 0x60) {
- int cv = bios->version.chip;
- if (cv < 0x17 || cv == 0x1a || cv == 0x20) {
- if (clk > 250000)
- maxM = 6;
- if (clk > 340000)
- maxM = 2;
- } else if (cv < 0x40) {
- if (clk > 150000)
- maxM = 6;
- if (clk > 200000)
- maxM = 4;
- if (clk > 340000)
- maxM = 2;
- }
- }
-
- P = 1 << maxP;
- if ((clk * P) < minvco) {
- minvco = clk * maxP;
- maxvco = minvco * 2;
- }
-
- if (clk + clk/200 > maxvco) /* +0.5% */
- maxvco = clk + clk/200;
-
- /* NV34 goes maxlog2P->0, NV20 goes 0->maxlog2P */
- for (thisP = minP; thisP <= maxP; thisP++) {
- P = 1 << thisP;
- clkP = clk * P;
-
- if (clkP < minvco)
- continue;
- if (clkP > maxvco)
- return bestclk;
-
- for (M = minM; M <= maxM; M++) {
- if (crystal/M < minU)
- return bestclk;
- if (crystal/M > maxU)
- continue;
-
- /* add crystal/2 to round better */
- N = (clkP * M + crystal/2) / crystal;
-
- if (N < minN)
- continue;
- if (N > maxN)
- break;
-
- /* more rounding additions */
- calcclk = ((N * crystal + P/2) / P + M/2) / M;
- delta = abs(calcclk - clk);
- /* we do an exhaustive search rather than terminating
- * on an optimality condition...
- */
- if (delta < bestdelta) {
- bestdelta = delta;
- bestclk = calcclk;
- *pN = N;
- *pM = M;
- *pP = thisP;
- if (delta == 0) /* except this one */
- return bestclk;
- }
- }
- }
-
- return bestclk;
-}
-
-static int
-getMNP_double(struct nouveau_subdev *subdev, struct nvbios_pll *info, int clk,
- int *pN1, int *pM1, int *pN2, int *pM2, int *pP)
-{
- /* Find M, N and P for a two stage PLL
- *
- * Note that some bioses (NV30+) have lookup tables of precomputed MNP
- * values, but we're too lazy to use those atm
- *
- * "clk" parameter in kHz
- * returns calculated clock
- */
- int chip_version = nouveau_bios(subdev)->version.chip;
- int minvco1 = info->vco1.min_freq, maxvco1 = info->vco1.max_freq;
- int minvco2 = info->vco2.min_freq, maxvco2 = info->vco2.max_freq;
- int minU1 = info->vco1.min_inputfreq, minU2 = info->vco2.min_inputfreq;
- int maxU1 = info->vco1.max_inputfreq, maxU2 = info->vco2.max_inputfreq;
- int minM1 = info->vco1.min_m, maxM1 = info->vco1.max_m;
- int minN1 = info->vco1.min_n, maxN1 = info->vco1.max_n;
- int minM2 = info->vco2.min_m, maxM2 = info->vco2.max_m;
- int minN2 = info->vco2.min_n, maxN2 = info->vco2.max_n;
- int maxlog2P = info->max_p_usable;
- int crystal = info->refclk;
- bool fixedgain2 = (minM2 == maxM2 && minN2 == maxN2);
- int M1, N1, M2, N2, log2P;
- int clkP, calcclk1, calcclk2, calcclkout;
- int delta, bestdelta = INT_MAX;
- int bestclk = 0;
-
- int vco2 = (maxvco2 - maxvco2/200) / 2;
- for (log2P = 0; clk && log2P < maxlog2P && clk <= (vco2 >> log2P); log2P++)
- ;
- clkP = clk << log2P;
-
- if (maxvco2 < clk + clk/200) /* +0.5% */
- maxvco2 = clk + clk/200;
-
- for (M1 = minM1; M1 <= maxM1; M1++) {
- if (crystal/M1 < minU1)
- return bestclk;
- if (crystal/M1 > maxU1)
- continue;
-
- for (N1 = minN1; N1 <= maxN1; N1++) {
- calcclk1 = crystal * N1 / M1;
- if (calcclk1 < minvco1)
- continue;
- if (calcclk1 > maxvco1)
- break;
-
- for (M2 = minM2; M2 <= maxM2; M2++) {
- if (calcclk1/M2 < minU2)
- break;
- if (calcclk1/M2 > maxU2)
- continue;
-
- /* add calcclk1/2 to round better */
- N2 = (clkP * M2 + calcclk1/2) / calcclk1;
- if (N2 < minN2)
- continue;
- if (N2 > maxN2)
- break;
-
- if (!fixedgain2) {
- if (chip_version < 0x60)
- if (N2/M2 < 4 || N2/M2 > 10)
- continue;
-
- calcclk2 = calcclk1 * N2 / M2;
- if (calcclk2 < minvco2)
- break;
- if (calcclk2 > maxvco2)
- continue;
- } else
- calcclk2 = calcclk1;
-
- calcclkout = calcclk2 >> log2P;
- delta = abs(calcclkout - clk);
- /* we do an exhaustive search rather than terminating
- * on an optimality condition...
- */
- if (delta < bestdelta) {
- bestdelta = delta;
- bestclk = calcclkout;
- *pN1 = N1;
- *pM1 = M1;
- *pN2 = N2;
- *pM2 = M2;
- *pP = log2P;
- if (delta == 0) /* except this one */
- return bestclk;
- }
- }
- }
- }
-
- return bestclk;
-}
-
-int
-nv04_pll_calc(struct nouveau_subdev *subdev, struct nvbios_pll *info, u32 freq,
- int *N1, int *M1, int *N2, int *M2, int *P)
-{
- int ret;
-
- if (!info->vco2.max_freq || !N2) {
- ret = getMNP_single(subdev, info, freq, N1, M1, P);
- if (N2) {
- *N2 = 1;
- *M2 = 1;
- }
- } else {
- ret = getMNP_double(subdev, info, freq, N1, M1, N2, M2, P);
- }
-
- if (!ret)
- nv_error(subdev, "unable to compute acceptable pll values\n");
- return ret;
-}
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