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      1 /*	$NetBSD: nouveau_nvkm_subdev_volt_gm20b.c,v 1.2 2021/12/18 23:45:42 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     22  * DEALINGS IN THE SOFTWARE.
     23  */
     24 
     25 #include <sys/cdefs.h>
     26 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_volt_gm20b.c,v 1.2 2021/12/18 23:45:42 riastradh Exp $");
     27 
     28 #include "priv.h"
     29 #include "gk20a.h"
     30 
     31 #include <core/tegra.h>
     32 
     33 static const struct cvb_coef gm20b_cvb_coef[] = {
     34 	/* KHz,             c0,      c1,   c2 */
     35 	/*  76800 */ { 1786666,  -85625, 1632 },
     36 	/* 153600 */ { 1846729,  -87525, 1632 },
     37 	/* 230400 */ { 1910480,  -89425, 1632 },
     38 	/* 307200 */ { 1977920,  -91325, 1632 },
     39 	/* 384000 */ { 2049049,  -93215, 1632 },
     40 	/* 460800 */ { 2122872,  -95095, 1632 },
     41 	/* 537600 */ { 2201331,  -96985, 1632 },
     42 	/* 614400 */ { 2283479,  -98885, 1632 },
     43 	/* 691200 */ { 2369315, -100785, 1632 },
     44 	/* 768000 */ { 2458841, -102685, 1632 },
     45 	/* 844800 */ { 2550821, -104555, 1632 },
     46 	/* 921600 */ { 2647676, -106455, 1632 },
     47 };
     48 
     49 static const struct cvb_coef gm20b_na_cvb_coef[] = {
     50 	/* KHz,         c0,     c1,   c2,    c3,     c4,   c5 */
     51 	/*  76800 */ {  814294, 8144, -940, 808, -21583, 226 },
     52 	/* 153600 */ {  856185, 8144, -940, 808, -21583, 226 },
     53 	/* 230400 */ {  898077, 8144, -940, 808, -21583, 226 },
     54 	/* 307200 */ {  939968, 8144, -940, 808, -21583, 226 },
     55 	/* 384000 */ {  981860, 8144, -940, 808, -21583, 226 },
     56 	/* 460800 */ { 1023751, 8144, -940, 808, -21583, 226 },
     57 	/* 537600 */ { 1065642, 8144, -940, 808, -21583, 226 },
     58 	/* 614400 */ { 1107534, 8144, -940, 808, -21583, 226 },
     59 	/* 691200 */ { 1149425, 8144, -940, 808, -21583, 226 },
     60 	/* 768000 */ { 1191317, 8144, -940, 808, -21583, 226 },
     61 	/* 844800 */ { 1233208, 8144, -940, 808, -21583, 226 },
     62 	/* 921600 */ { 1275100, 8144, -940, 808, -21583, 226 },
     63 	/* 998400 */ { 1316991, 8144, -940, 808, -21583, 226 },
     64 };
     65 
     66 static const u32 speedo_to_vmin[] = {
     67 	/*   0,      1,      2,      3,      4, */
     68 	950000, 840000, 818750, 840000, 810000,
     69 };
     70 
     71 int
     72 gm20b_volt_new(struct nvkm_device *device, int index, struct nvkm_volt **pvolt)
     73 {
     74 	struct nvkm_device_tegra *tdev = device->func->tegra(device);
     75 	struct gk20a_volt *volt;
     76 	u32 vmin;
     77 
     78 	if (tdev->gpu_speedo_id >= ARRAY_SIZE(speedo_to_vmin)) {
     79 		nvdev_error(device, "unsupported speedo %d\n",
     80 			    tdev->gpu_speedo_id);
     81 		return -EINVAL;
     82 	}
     83 
     84 	volt = kzalloc(sizeof(*volt), GFP_KERNEL);
     85 	if (!volt)
     86 		return -ENOMEM;
     87 	*pvolt = &volt->base;
     88 
     89 	vmin = speedo_to_vmin[tdev->gpu_speedo_id];
     90 
     91 	if (tdev->gpu_speedo_id >= 1)
     92 		return gk20a_volt_ctor(device, index, gm20b_na_cvb_coef,
     93 				     ARRAY_SIZE(gm20b_na_cvb_coef), vmin, volt);
     94 	else
     95 		return gk20a_volt_ctor(device, index, gm20b_cvb_coef,
     96 					ARRAY_SIZE(gm20b_cvb_coef), vmin, volt);
     97 }
     98