| 1 | /* $NetBSD: nouveau_subdev_volt_base.c,v 1.1.1.1 2014/08/06 12:36:32 riastradh Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright 2013 Red Hat Inc. |
| 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 22 | * OTHER DEALINGS IN THE SOFTWARE. |
| 23 | * |
| 24 | * Authors: Ben Skeggs |
| 25 | */ |
| 26 | |
| 27 | #include <sys/cdefs.h> |
| 28 | __KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_volt_base.c,v 1.1.1.1 2014/08/06 12:36:32 riastradh Exp $" ); |
| 29 | |
| 30 | #include <subdev/volt.h> |
| 31 | |
| 32 | #include <subdev/bios.h> |
| 33 | #include <subdev/bios/vmap.h> |
| 34 | #include <subdev/bios/volt.h> |
| 35 | |
| 36 | static int |
| 37 | nouveau_volt_get(struct nouveau_volt *volt) |
| 38 | { |
| 39 | if (volt->vid_get) { |
| 40 | int ret = volt->vid_get(volt), i; |
| 41 | if (ret >= 0) { |
| 42 | for (i = 0; i < volt->vid_nr; i++) { |
| 43 | if (volt->vid[i].vid == ret) |
| 44 | return volt->vid[i].uv; |
| 45 | } |
| 46 | ret = -EINVAL; |
| 47 | } |
| 48 | return ret; |
| 49 | } |
| 50 | return -ENODEV; |
| 51 | } |
| 52 | |
| 53 | static int |
| 54 | nouveau_volt_set(struct nouveau_volt *volt, u32 uv) |
| 55 | { |
| 56 | if (volt->vid_set) { |
| 57 | int i, ret = -EINVAL; |
| 58 | for (i = 0; i < volt->vid_nr; i++) { |
| 59 | if (volt->vid[i].uv == uv) { |
| 60 | ret = volt->vid_set(volt, volt->vid[i].vid); |
| 61 | nv_debug(volt, "set %duv: %d\n" , uv, ret); |
| 62 | break; |
| 63 | } |
| 64 | } |
| 65 | return ret; |
| 66 | } |
| 67 | return -ENODEV; |
| 68 | } |
| 69 | |
| 70 | static int |
| 71 | nouveau_volt_map(struct nouveau_volt *volt, u8 id) |
| 72 | { |
| 73 | struct nouveau_bios *bios = nouveau_bios(volt); |
| 74 | struct nvbios_vmap_entry info; |
| 75 | u8 ver, len; |
| 76 | u16 vmap; |
| 77 | |
| 78 | vmap = nvbios_vmap_entry_parse(bios, id, &ver, &len, &info); |
| 79 | if (vmap) { |
| 80 | if (info.link != 0xff) { |
| 81 | int ret = nouveau_volt_map(volt, info.link); |
| 82 | if (ret < 0) |
| 83 | return ret; |
| 84 | info.min += ret; |
| 85 | } |
| 86 | return info.min; |
| 87 | } |
| 88 | |
| 89 | return id ? id * 10000 : -ENODEV; |
| 90 | } |
| 91 | |
| 92 | static int |
| 93 | nouveau_volt_set_id(struct nouveau_volt *volt, u8 id, int condition) |
| 94 | { |
| 95 | int ret = nouveau_volt_map(volt, id); |
| 96 | if (ret >= 0) { |
| 97 | int prev = nouveau_volt_get(volt); |
| 98 | if (!condition || prev < 0 || |
| 99 | (condition < 0 && ret < prev) || |
| 100 | (condition > 0 && ret > prev)) { |
| 101 | ret = nouveau_volt_set(volt, ret); |
| 102 | } else { |
| 103 | ret = 0; |
| 104 | } |
| 105 | } |
| 106 | return ret; |
| 107 | } |
| 108 | |
| 109 | int |
| 110 | _nouveau_volt_init(struct nouveau_object *object) |
| 111 | { |
| 112 | struct nouveau_volt *volt = (void *)object; |
| 113 | int ret; |
| 114 | |
| 115 | ret = nouveau_subdev_init(&volt->base); |
| 116 | if (ret) |
| 117 | return ret; |
| 118 | |
| 119 | ret = volt->get(volt); |
| 120 | if (ret < 0) { |
| 121 | if (ret != -ENODEV) |
| 122 | nv_debug(volt, "current voltage unknown\n" ); |
| 123 | return 0; |
| 124 | } |
| 125 | |
| 126 | nv_info(volt, "GPU voltage: %duv\n" , ret); |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | void |
| 131 | _nouveau_volt_dtor(struct nouveau_object *object) |
| 132 | { |
| 133 | struct nouveau_volt *volt = (void *)object; |
| 134 | nouveau_subdev_destroy(&volt->base); |
| 135 | } |
| 136 | |
| 137 | int |
| 138 | nouveau_volt_create_(struct nouveau_object *parent, |
| 139 | struct nouveau_object *engine, |
| 140 | struct nouveau_oclass *oclass, int length, void **pobject) |
| 141 | { |
| 142 | struct nouveau_bios *bios = nouveau_bios(parent); |
| 143 | struct nouveau_volt *volt; |
| 144 | struct nvbios_volt_entry ivid; |
| 145 | struct nvbios_volt info; |
| 146 | u8 ver, hdr, cnt, len; |
| 147 | u16 data; |
| 148 | int ret, i; |
| 149 | |
| 150 | ret = nouveau_subdev_create_(parent, engine, oclass, 0, "VOLT" , |
| 151 | "voltage" , length, pobject); |
| 152 | volt = *pobject; |
| 153 | if (ret) |
| 154 | return ret; |
| 155 | |
| 156 | volt->get = nouveau_volt_get; |
| 157 | volt->set = nouveau_volt_set; |
| 158 | volt->set_id = nouveau_volt_set_id; |
| 159 | |
| 160 | data = nvbios_volt_parse(bios, &ver, &hdr, &cnt, &len, &info); |
| 161 | if (data && info.vidmask && info.base && info.step) { |
| 162 | for (i = 0; i < info.vidmask + 1; i++) { |
| 163 | if (info.base >= info.min && |
| 164 | info.base <= info.max) { |
| 165 | volt->vid[volt->vid_nr].uv = info.base; |
| 166 | volt->vid[volt->vid_nr].vid = i; |
| 167 | volt->vid_nr++; |
| 168 | } |
| 169 | info.base += info.step; |
| 170 | } |
| 171 | volt->vid_mask = info.vidmask; |
| 172 | } else |
| 173 | if (data && info.vidmask) { |
| 174 | for (i = 0; i < cnt; i++) { |
| 175 | data = nvbios_volt_entry_parse(bios, i, &ver, &hdr, |
| 176 | &ivid); |
| 177 | if (data) { |
| 178 | volt->vid[volt->vid_nr].uv = ivid.voltage; |
| 179 | volt->vid[volt->vid_nr].vid = ivid.vid; |
| 180 | volt->vid_nr++; |
| 181 | } |
| 182 | } |
| 183 | volt->vid_mask = info.vidmask; |
| 184 | } |
| 185 | |
| 186 | if (volt->vid_nr) { |
| 187 | for (i = 0; i < volt->vid_nr; i++) { |
| 188 | nv_debug(volt, "VID %02x: %duv\n" , |
| 189 | volt->vid[i].vid, volt->vid[i].uv); |
| 190 | } |
| 191 | |
| 192 | /*XXX: this is an assumption.. there probably exists boards |
| 193 | * out there with i2c-connected voltage controllers too.. |
| 194 | */ |
| 195 | ret = nouveau_voltgpio_init(volt); |
| 196 | if (ret == 0) { |
| 197 | volt->vid_get = nouveau_voltgpio_get; |
| 198 | volt->vid_set = nouveau_voltgpio_set; |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | return ret; |
| 203 | } |
| 204 | |