diff options
Diffstat (limited to 'nvkm/subdev/clock/pllnva3.c')
| -rw-r--r-- | nvkm/subdev/clock/pllnva3.c | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/nvkm/subdev/clock/pllnva3.c b/nvkm/subdev/clock/pllnva3.c deleted file mode 100644 index 8eca457c2..000000000 --- a/nvkm/subdev/clock/pllnva3.c +++ /dev/null @@ -1,89 +0,0 @@ -/* - * Copyright 2010 Red Hat Inc. - * - * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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. - * - * Authors: Ben Skeggs - */ - -#include <subdev/clock.h> -#include <subdev/bios.h> -#include <subdev/bios/pll.h> - -#include "pll.h" - -int -nva3_pll_calc(struct nouveau_subdev *subdev, struct nvbios_pll *info, - u32 freq, int *pN, int *pfN, int *pM, int *P) -{ - u32 best_err = ~0, err; - int M, lM, hM, N, fN; - - *P = info->vco1.max_freq / freq; - if (*P > info->max_p) - *P = info->max_p; - if (*P < info->min_p) - *P = info->min_p; - - lM = (info->refclk + info->vco1.max_inputfreq) / info->vco1.max_inputfreq; - lM = max(lM, (int)info->vco1.min_m); - hM = (info->refclk + info->vco1.min_inputfreq) / info->vco1.min_inputfreq; - hM = min(hM, (int)info->vco1.max_m); - lM = min(lM, hM); - - for (M = lM; M <= hM; M++) { - u32 tmp = freq * *P * M; - N = tmp / info->refclk; - fN = tmp % info->refclk; - - if (!pfN) { - if (fN >= info->refclk / 2) - N++; - } else { - if (fN < info->refclk / 2) - N--; - fN = tmp - (N * info->refclk); - } - - if (N < info->vco1.min_n) - continue; - if (N > info->vco1.max_n) - break; - - err = abs(freq - (info->refclk * N / M / *P)); - if (err < best_err) { - best_err = err; - *pN = N; - *pM = M; - } - - if (pfN) { - *pfN = ((fN << 13) + info->refclk / 2) / info->refclk; - *pfN = (*pfN - 4096) & 0xffff; - return freq; - } - } - - if (unlikely(best_err == ~0)) { - nv_error(subdev, "unable to find matching pll values\n"); - return -EINVAL; - } - - return info->refclk * *pN / *pM / *P; -} |