subdev/volt/gm20b.c

0001 /*
0002  * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
0018  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
0019  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
0020  * DEALINGS IN THE SOFTWARE.
0021  */
0022
0023 #include "priv.h"
0024 #include "gk20a.h"
0025
0026 #include <core/tegra.h>
0027
0028 static const struct cvb_coef gm20b_cvb_coef[] = {
0029     /* KHz,             c0,      c1,   c2 */
0030     /*  76800 */ { 1786666,  -85625, 1632 },
0031     /* 153600 */ { 1846729,  -87525, 1632 },
0032     /* 230400 */ { 1910480,  -89425, 1632 },
0033     /* 307200 */ { 1977920,  -91325, 1632 },
0034     /* 384000 */ { 2049049,  -93215, 1632 },
0035     /* 460800 */ { 2122872,  -95095, 1632 },
0036     /* 537600 */ { 2201331,  -96985, 1632 },
0037     /* 614400 */ { 2283479,  -98885, 1632 },
0038     /* 691200 */ { 2369315, -100785, 1632 },
0039     /* 768000 */ { 2458841, -102685, 1632 },
0040     /* 844800 */ { 2550821, -104555, 1632 },
0041     /* 921600 */ { 2647676, -106455, 1632 },
0042 };
0043
0044 static const struct cvb_coef gm20b_na_cvb_coef[] = {
0045     /* KHz,         c0,     c1,   c2,    c3,     c4,   c5 */
0046     /*  76800 */ {  814294, 8144, -940, 808, -21583, 226 },
0047     /* 153600 */ {  856185, 8144, -940, 808, -21583, 226 },
0048     /* 230400 */ {  898077, 8144, -940, 808, -21583, 226 },
0049     /* 307200 */ {  939968, 8144, -940, 808, -21583, 226 },
0050     /* 384000 */ {  981860, 8144, -940, 808, -21583, 226 },
0051     /* 460800 */ { 1023751, 8144, -940, 808, -21583, 226 },
0052     /* 537600 */ { 1065642, 8144, -940, 808, -21583, 226 },
0053     /* 614400 */ { 1107534, 8144, -940, 808, -21583, 226 },
0054     /* 691200 */ { 1149425, 8144, -940, 808, -21583, 226 },
0055     /* 768000 */ { 1191317, 8144, -940, 808, -21583, 226 },
0056     /* 844800 */ { 1233208, 8144, -940, 808, -21583, 226 },
0057     /* 921600 */ { 1275100, 8144, -940, 808, -21583, 226 },
0058     /* 998400 */ { 1316991, 8144, -940, 808, -21583, 226 },
0059 };
0060
0061 static const u32 speedo_to_vmin[] = {
0062     /*   0,      1,      2,      3,      4, */
0063     950000, 840000, 818750, 840000, 810000,
0064 };
0065
0066 int
0067 gm20b_volt_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
0068            struct nvkm_volt **pvolt)
0069 {
0070     struct nvkm_device_tegra *tdev = device->func->tegra(device);
0071     struct gk20a_volt *volt;
0072     u32 vmin;
0073
0074     if (tdev->gpu_speedo_id >= ARRAY_SIZE(speedo_to_vmin)) {
0075         nvdev_error(device, "unsupported speedo %d\n",
0076                 tdev->gpu_speedo_id);
0077         return -EINVAL;
0078     }
0079
0080     volt = kzalloc(sizeof(*volt), GFP_KERNEL);
0081     if (!volt)
0082         return -ENOMEM;
0083     *pvolt = &volt->base;
0084
0085     vmin = speedo_to_vmin[tdev->gpu_speedo_id];
0086
0087     if (tdev->gpu_speedo_id >= 1)
0088         return gk20a_volt_ctor(device, type, inst, gm20b_na_cvb_coef,
0089                        ARRAY_SIZE(gm20b_na_cvb_coef), vmin, volt);
0090     else
0091         return gk20a_volt_ctor(device, type, inst, gm20b_cvb_coef,
0092                        ARRAY_SIZE(gm20b_cvb_coef), vmin, volt);
0093 }