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