diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk20a.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk20a.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk20a.c b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk20a.c new file mode 100644 index 000000000000..871fd51011db --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk20a.c @@ -0,0 +1,197 @@ +/* + * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. + * + * 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 AUTHORS OR COPYRIGHT HOLDERS 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. + */ +#include <subdev/volt.h> +#ifdef __KERNEL__ +#include <nouveau_platform.h> +#endif + +struct cvb_coef { + int c0; + int c1; + int c2; + int c3; + int c4; + int c5; +}; + +struct gk20a_volt_priv { + struct nvkm_volt base; + struct regulator *vdd; +}; + +const struct cvb_coef gk20a_cvb_coef[] = { + /* MHz, c0, c1, c2, c3, c4, c5 */ + /* 72 */ { 1209886, -36468, 515, 417, -13123, 203}, + /* 108 */ { 1130804, -27659, 296, 298, -10834, 221}, + /* 180 */ { 1162871, -27110, 247, 238, -10681, 268}, + /* 252 */ { 1220458, -28654, 247, 179, -10376, 298}, + /* 324 */ { 1280953, -30204, 247, 119, -9766, 304}, + /* 396 */ { 1344547, -31777, 247, 119, -8545, 292}, + /* 468 */ { 1420168, -34227, 269, 60, -7172, 256}, + /* 540 */ { 1490757, -35955, 274, 60, -5188, 197}, + /* 612 */ { 1599112, -42583, 398, 0, -1831, 119}, + /* 648 */ { 1366986, -16459, -274, 0, -3204, 72}, + /* 684 */ { 1391884, -17078, -274, -60, -1526, 30}, + /* 708 */ { 1415522, -17497, -274, -60, -458, 0}, + /* 756 */ { 1464061, -18331, -274, -119, 1831, -72}, + /* 804 */ { 1524225, -20064, -254, -119, 4272, -155}, + /* 852 */ { 1608418, -21643, -269, 0, 763, -48}, +}; + +/** + * cvb_mv = ((c2 * speedo / s_scale + c1) * speedo / s_scale + c0) + */ +static inline int +gk20a_volt_get_cvb_voltage(int speedo, int s_scale, const struct cvb_coef *coef) +{ + int mv; + + mv = DIV_ROUND_CLOSEST(coef->c2 * speedo, s_scale); + mv = DIV_ROUND_CLOSEST((mv + coef->c1) * speedo, s_scale) + coef->c0; + return mv; +} + +/** + * cvb_t_mv = + * ((c2 * speedo / s_scale + c1) * speedo / s_scale + c0) + + * ((c3 * speedo / s_scale + c4 + c5 * T / t_scale) * T / t_scale) + */ +static inline int +gk20a_volt_get_cvb_t_voltage(int speedo, int temp, int s_scale, int t_scale, + const struct cvb_coef *coef) +{ + int cvb_mv, mv; + + cvb_mv = gk20a_volt_get_cvb_voltage(speedo, s_scale, coef); + + mv = DIV_ROUND_CLOSEST(coef->c3 * speedo, s_scale) + coef->c4 + + DIV_ROUND_CLOSEST(coef->c5 * temp, t_scale); + mv = DIV_ROUND_CLOSEST(mv * temp, t_scale) + cvb_mv; + return mv; +} + +static int +gk20a_volt_calc_voltage(const struct cvb_coef *coef, int speedo) +{ + int mv; + + mv = gk20a_volt_get_cvb_t_voltage(speedo, -10, 100, 10, coef); + mv = DIV_ROUND_UP(mv, 1000); + + return mv * 1000; +} + +static int +gk20a_volt_vid_get(struct nvkm_volt *volt) +{ + struct gk20a_volt_priv *priv = (void *)volt; + int i, uv; + + uv = regulator_get_voltage(priv->vdd); + + for (i = 0; i < volt->vid_nr; i++) + if (volt->vid[i].uv >= uv) + return i; + + return -EINVAL; +} + +static int +gk20a_volt_vid_set(struct nvkm_volt *volt, u8 vid) +{ + struct gk20a_volt_priv *priv = (void *)volt; + + nv_debug(volt, "set voltage as %duv\n", volt->vid[vid].uv); + return regulator_set_voltage(priv->vdd, volt->vid[vid].uv, 1200000); +} + +static int +gk20a_volt_set_id(struct nvkm_volt *volt, u8 id, int condition) +{ + struct gk20a_volt_priv *priv = (void *)volt; + int prev_uv = regulator_get_voltage(priv->vdd); + int target_uv = volt->vid[id].uv; + int ret; + + nv_debug(volt, "prev=%d, target=%d, condition=%d\n", + prev_uv, target_uv, condition); + if (!condition || + (condition < 0 && target_uv < prev_uv) || + (condition > 0 && target_uv > prev_uv)) { + ret = gk20a_volt_vid_set(volt, volt->vid[id].vid); + } else { + ret = 0; + } + + return ret; +} + +static int +gk20a_volt_ctor(struct nvkm_object *parent, struct nvkm_object *engine, + struct nvkm_oclass *oclass, void *data, u32 size, + struct nvkm_object **pobject) +{ + struct gk20a_volt_priv *priv; + struct nvkm_volt *volt; + struct nouveau_platform_device *plat; + int i, ret, uv; + + ret = nvkm_volt_create(parent, engine, oclass, &priv); + *pobject = nv_object(priv); + if (ret) + return ret; + + volt = &priv->base; + + plat = nv_device_to_platform(nv_device(parent)); + + uv = regulator_get_voltage(plat->gpu->vdd); + nv_info(priv, "The default voltage is %duV\n", uv); + + priv->vdd = plat->gpu->vdd; + priv->base.vid_get = gk20a_volt_vid_get; + priv->base.vid_set = gk20a_volt_vid_set; + priv->base.set_id = gk20a_volt_set_id; + + volt->vid_nr = ARRAY_SIZE(gk20a_cvb_coef); + nv_debug(priv, "%s - vid_nr = %d\n", __func__, volt->vid_nr); + for (i = 0; i < volt->vid_nr; i++) { + volt->vid[i].vid = i; + volt->vid[i].uv = gk20a_volt_calc_voltage(&gk20a_cvb_coef[i], + plat->gpu_speedo); + nv_debug(priv, "%2d: vid=%d, uv=%d\n", i, volt->vid[i].vid, + volt->vid[i].uv); + } + + return 0; +} + +struct nvkm_oclass +gk20a_volt_oclass = { + .handle = NV_SUBDEV(VOLT, 0xea), + .ofuncs = &(struct nvkm_ofuncs) { + .ctor = gk20a_volt_ctor, + .dtor = _nvkm_volt_dtor, + .init = _nvkm_volt_init, + .fini = _nvkm_volt_fini, + }, +}; |