diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/volt')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/volt/Kbuild | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/volt/base.c | 207 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk20a.c | 199 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/volt/gpio.c | 96 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/volt/nv40.c | 56 |
5 files changed, 562 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/volt/Kbuild b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/Kbuild new file mode 100644 index 000000000000..6b46ff4213a3 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/Kbuild @@ -0,0 +1,4 @@ +nvkm-y += nvkm/subdev/volt/base.o +nvkm-y += nvkm/subdev/volt/gpio.o +nvkm-y += nvkm/subdev/volt/nv40.o +nvkm-y += nvkm/subdev/volt/gk20a.o diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/volt/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/base.c new file mode 100644 index 000000000000..26ccd8df193f --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/base.c @@ -0,0 +1,207 @@ +/* + * Copyright 2013 Red Hat Inc. + * + * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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. + * + * Authors: Ben Skeggs + */ + +#include <subdev/volt.h> + +#include <subdev/bios.h> +#include <subdev/bios/vmap.h> +#include <subdev/bios/volt.h> + +static int +nouveau_volt_get(struct nouveau_volt *volt) +{ + if (volt->vid_get) { + int ret = volt->vid_get(volt), i; + if (ret >= 0) { + for (i = 0; i < volt->vid_nr; i++) { + if (volt->vid[i].vid == ret) + return volt->vid[i].uv; + } + ret = -EINVAL; + } + return ret; + } + return -ENODEV; +} + +static int +nouveau_volt_set(struct nouveau_volt *volt, u32 uv) +{ + if (volt->vid_set) { + int i, ret = -EINVAL; + for (i = 0; i < volt->vid_nr; i++) { + if (volt->vid[i].uv == uv) { + ret = volt->vid_set(volt, volt->vid[i].vid); + nv_debug(volt, "set %duv: %d\n", uv, ret); + break; + } + } + return ret; + } + return -ENODEV; +} + +static int +nouveau_volt_map(struct nouveau_volt *volt, u8 id) +{ + struct nouveau_bios *bios = nouveau_bios(volt); + struct nvbios_vmap_entry info; + u8 ver, len; + u16 vmap; + + vmap = nvbios_vmap_entry_parse(bios, id, &ver, &len, &info); + if (vmap) { + if (info.link != 0xff) { + int ret = nouveau_volt_map(volt, info.link); + if (ret < 0) + return ret; + info.min += ret; + } + return info.min; + } + + return id ? id * 10000 : -ENODEV; +} + +static int +nouveau_volt_set_id(struct nouveau_volt *volt, u8 id, int condition) +{ + int ret = nouveau_volt_map(volt, id); + if (ret >= 0) { + int prev = nouveau_volt_get(volt); + if (!condition || prev < 0 || + (condition < 0 && ret < prev) || + (condition > 0 && ret > prev)) { + ret = nouveau_volt_set(volt, ret); + } else { + ret = 0; + } + } + return ret; +} + +static void nouveau_volt_parse_bios(struct nouveau_bios *bios, + struct nouveau_volt *volt) +{ + struct nvbios_volt_entry ivid; + struct nvbios_volt info; + u8 ver, hdr, cnt, len; + u16 data; + int i; + + data = nvbios_volt_parse(bios, &ver, &hdr, &cnt, &len, &info); + if (data && info.vidmask && info.base && info.step) { + for (i = 0; i < info.vidmask + 1; i++) { + if (info.base >= info.min && + info.base <= info.max) { + volt->vid[volt->vid_nr].uv = info.base; + volt->vid[volt->vid_nr].vid = i; + volt->vid_nr++; + } + info.base += info.step; + } + volt->vid_mask = info.vidmask; + } else if (data && info.vidmask) { + for (i = 0; i < cnt; i++) { + data = nvbios_volt_entry_parse(bios, i, &ver, &hdr, + &ivid); + if (data) { + volt->vid[volt->vid_nr].uv = ivid.voltage; + volt->vid[volt->vid_nr].vid = ivid.vid; + volt->vid_nr++; + } + } + volt->vid_mask = info.vidmask; + } +} + +int +_nouveau_volt_init(struct nouveau_object *object) +{ + struct nouveau_volt *volt = (void *)object; + int ret; + + ret = nouveau_subdev_init(&volt->base); + if (ret) + return ret; + + ret = volt->get(volt); + if (ret < 0) { + if (ret != -ENODEV) + nv_debug(volt, "current voltage unknown\n"); + return 0; + } + + nv_info(volt, "GPU voltage: %duv\n", ret); + return 0; +} + +void +_nouveau_volt_dtor(struct nouveau_object *object) +{ + struct nouveau_volt *volt = (void *)object; + nouveau_subdev_destroy(&volt->base); +} + +int +nouveau_volt_create_(struct nouveau_object *parent, + struct nouveau_object *engine, + struct nouveau_oclass *oclass, int length, void **pobject) +{ + struct nouveau_bios *bios = nouveau_bios(parent); + struct nouveau_volt *volt; + int ret, i; + + ret = nouveau_subdev_create_(parent, engine, oclass, 0, "VOLT", + "voltage", length, pobject); + volt = *pobject; + if (ret) + return ret; + + volt->get = nouveau_volt_get; + volt->set = nouveau_volt_set; + volt->set_id = nouveau_volt_set_id; + + /* Assuming the non-bios device should build the voltage table later */ + if (bios) + nouveau_volt_parse_bios(bios, volt); + + if (volt->vid_nr) { + for (i = 0; i < volt->vid_nr; i++) { + nv_debug(volt, "VID %02x: %duv\n", + volt->vid[i].vid, volt->vid[i].uv); + } + + /*XXX: this is an assumption.. there probably exists boards + * out there with i2c-connected voltage controllers too.. + */ + ret = nouveau_voltgpio_init(volt); + if (ret == 0) { + volt->vid_get = nouveau_voltgpio_get; + volt->vid_set = nouveau_voltgpio_set; + } + } + + return ret; +} 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..717368ef31ac --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk20a.c @@ -0,0 +1,199 @@ +/* + * 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. + */ + +#ifdef __KERNEL__ +#include <nouveau_platform.h> +#endif +#include <subdev/volt.h> + +struct cvb_coef { + int c0; + int c1; + int c2; + int c3; + int c4; + int c5; +}; + +struct gk20a_volt_priv { + struct nouveau_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 nouveau_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 nouveau_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 nouveau_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 nouveau_object *parent, struct nouveau_object *engine, + struct nouveau_oclass *oclass, void *data, u32 size, + struct nouveau_object **pobject) +{ + struct gk20a_volt_priv *priv; + struct nouveau_volt *volt; + struct nouveau_platform_device *plat; + int i, ret, uv; + + ret = nouveau_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 nouveau_oclass +gk20a_volt_oclass = { + .handle = NV_SUBDEV(VOLT, 0xea), + .ofuncs = &(struct nouveau_ofuncs) { + .ctor = gk20a_volt_ctor, + .dtor = _nouveau_volt_dtor, + .init = _nouveau_volt_init, + .fini = _nouveau_volt_fini, + }, +}; diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gpio.c b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gpio.c new file mode 100644 index 000000000000..755fa91bcd09 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gpio.c @@ -0,0 +1,96 @@ +/* + * Copyright 2013 Red Hat Inc. + * + * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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. + * + * Authors: Ben Skeggs + */ + +#include <subdev/volt.h> +#include <subdev/gpio.h> +#include <subdev/bios/gpio.h> + +static const u8 tags[] = { + DCB_GPIO_VID0, DCB_GPIO_VID1, DCB_GPIO_VID2, DCB_GPIO_VID3, + DCB_GPIO_VID4, DCB_GPIO_VID5, DCB_GPIO_VID6, DCB_GPIO_VID7, +}; + +int +nouveau_voltgpio_get(struct nouveau_volt *volt) +{ + struct nouveau_gpio *gpio = nouveau_gpio(volt); + u8 vid = 0; + int i; + + for (i = 0; i < ARRAY_SIZE(tags); i++) { + if (volt->vid_mask & (1 << i)) { + int ret = gpio->get(gpio, 0, tags[i], 0xff); + if (ret < 0) + return ret; + vid |= ret << i; + } + } + + return vid; +} + +int +nouveau_voltgpio_set(struct nouveau_volt *volt, u8 vid) +{ + struct nouveau_gpio *gpio = nouveau_gpio(volt); + int i; + + for (i = 0; i < ARRAY_SIZE(tags); i++, vid >>= 1) { + if (volt->vid_mask & (1 << i)) { + int ret = gpio->set(gpio, 0, tags[i], 0xff, vid & 1); + if (ret < 0) + return ret; + } + } + + return 0; +} + +int +nouveau_voltgpio_init(struct nouveau_volt *volt) +{ + struct nouveau_gpio *gpio = nouveau_gpio(volt); + struct dcb_gpio_func func; + int i; + + /* check we have gpio function info for each vid bit. on some + * boards (ie. nvs295) the vid mask has more bits than there + * are valid gpio functions... from traces, nvidia appear to + * just touch the existing ones, so let's mask off the invalid + * bits and continue with life + */ + for (i = 0; i < ARRAY_SIZE(tags); i++) { + if (volt->vid_mask & (1 << i)) { + int ret = gpio->find(gpio, 0, tags[i], 0xff, &func); + if (ret) { + if (ret != -ENOENT) + return ret; + nv_debug(volt, "VID bit %d has no GPIO\n", i); + volt->vid_mask &= ~(1 << i); + } + } + } + + return 0; +} diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/volt/nv40.c b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/nv40.c new file mode 100644 index 000000000000..87d5358376a6 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/nv40.c @@ -0,0 +1,56 @@ +/* + * Copyright 2013 Red Hat Inc. + * + * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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. + * + * Authors: Ben Skeggs + */ + +#include <subdev/volt.h> + +struct nv40_volt_priv { + struct nouveau_volt base; +}; + +static int +nv40_volt_ctor(struct nouveau_object *parent, struct nouveau_object *engine, + struct nouveau_oclass *oclass, void *data, u32 size, + struct nouveau_object **pobject) +{ + struct nv40_volt_priv *priv; + int ret; + + ret = nouveau_volt_create(parent, engine, oclass, &priv); + *pobject = nv_object(priv); + if (ret) + return ret; + + return 0; +} + +struct nouveau_oclass +nv40_volt_oclass = { + .handle = NV_SUBDEV(VOLT, 0x40), + .ofuncs = &(struct nouveau_ofuncs) { + .ctor = nv40_volt_ctor, + .dtor = _nouveau_volt_dtor, + .init = _nouveau_volt_init, + .fini = _nouveau_volt_fini, + }, +}; |