summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/nouveau/core/subdev/volt
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/nouveau/core/subdev/volt')
-rw-r--r--drivers/gpu/drm/nouveau/core/subdev/volt/base.c198
-rw-r--r--drivers/gpu/drm/nouveau/core/subdev/volt/gpio.c96
-rw-r--r--drivers/gpu/drm/nouveau/core/subdev/volt/nv40.c56
3 files changed, 350 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/volt/base.c b/drivers/gpu/drm/nouveau/core/subdev/volt/base.c
new file mode 100644
index 00000000000..32794a99910
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/core/subdev/volt/base.c
@@ -0,0 +1,198 @@
+/*
+ * 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;
+}
+
+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;
+ struct nvbios_volt_entry ivid;
+ struct nvbios_volt info;
+ u8 ver, hdr, cnt, len;
+ u16 data;
+ 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;
+
+ 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;
+ }
+
+ 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/core/subdev/volt/gpio.c b/drivers/gpu/drm/nouveau/core/subdev/volt/gpio.c
new file mode 100644
index 00000000000..755fa91bcd0
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/core/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/core/subdev/volt/nv40.c b/drivers/gpu/drm/nouveau/core/subdev/volt/nv40.c
new file mode 100644
index 00000000000..87d5358376a
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/core/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,
+ },
+};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-10-19 02:24:00 +0000