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authorBen Skeggs <bskeggs@redhat.com>2015-01-13 15:13:14 +0300
committerBen Skeggs <bskeggs@redhat.com>2015-01-22 05:15:10 +0300
commitc39f472e9f14e49a9bc091977ced0ec45fc00c57 (patch)
tree75af3291cccda2482913cc0044888a8a86f4841b /drivers/gpu/drm/nouveau/nvkm/subdev/therm/fanpwm.c
parent055a65d5987a7f246c3fc2297158286882dbdbcf (diff)
downloadlinux-c39f472e9f14e49a9bc091977ced0ec45fc00c57.tar.xz
drm/nouveau: remove symlinks, move core/ to nvkm/ (no code changes)
The symlinks were annoying some people, and they're not used anywhere else in the kernel tree. The include directory structure has been changed so that symlinks aren't needed anymore. NVKM has been moved from core/ to nvkm/ to make it more obvious as to what the directory is for, and as some minor prep for when NVKM gets split out into its own module (virt) at a later date. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/therm/fanpwm.c')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/therm/fanpwm.c113
1 files changed, 113 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/therm/fanpwm.c b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/fanpwm.c
new file mode 100644
index 000000000000..c629d7f2a6a4
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/fanpwm.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2012 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
+ * Martin Peres
+ */
+
+#include <core/option.h>
+#include <subdev/gpio.h>
+#include <subdev/bios.h>
+#include <subdev/bios/fan.h>
+
+#include "priv.h"
+
+struct nouveau_fanpwm_priv {
+ struct nouveau_fan base;
+ struct dcb_gpio_func func;
+};
+
+static int
+nouveau_fanpwm_get(struct nouveau_therm *therm)
+{
+ struct nouveau_therm_priv *tpriv = (void *)therm;
+ struct nouveau_fanpwm_priv *priv = (void *)tpriv->fan;
+ struct nouveau_gpio *gpio = nouveau_gpio(therm);
+ int card_type = nv_device(therm)->card_type;
+ u32 divs, duty;
+ int ret;
+
+ ret = therm->pwm_get(therm, priv->func.line, &divs, &duty);
+ if (ret == 0 && divs) {
+ divs = max(divs, duty);
+ if (card_type <= NV_40 || (priv->func.log[0] & 1))
+ duty = divs - duty;
+ return (duty * 100) / divs;
+ }
+
+ return gpio->get(gpio, 0, priv->func.func, priv->func.line) * 100;
+}
+
+static int
+nouveau_fanpwm_set(struct nouveau_therm *therm, int percent)
+{
+ struct nouveau_therm_priv *tpriv = (void *)therm;
+ struct nouveau_fanpwm_priv *priv = (void *)tpriv->fan;
+ int card_type = nv_device(therm)->card_type;
+ u32 divs, duty;
+ int ret;
+
+ divs = priv->base.perf.pwm_divisor;
+ if (priv->base.bios.pwm_freq) {
+ divs = 1;
+ if (therm->pwm_clock)
+ divs = therm->pwm_clock(therm, priv->func.line);
+ divs /= priv->base.bios.pwm_freq;
+ }
+
+ duty = ((divs * percent) + 99) / 100;
+ if (card_type <= NV_40 || (priv->func.log[0] & 1))
+ duty = divs - duty;
+
+ ret = therm->pwm_set(therm, priv->func.line, divs, duty);
+ if (ret == 0)
+ ret = therm->pwm_ctrl(therm, priv->func.line, true);
+ return ret;
+}
+
+int
+nouveau_fanpwm_create(struct nouveau_therm *therm, struct dcb_gpio_func *func)
+{
+ struct nouveau_device *device = nv_device(therm);
+ struct nouveau_therm_priv *tpriv = (void *)therm;
+ struct nouveau_bios *bios = nouveau_bios(therm);
+ struct nouveau_fanpwm_priv *priv;
+ struct nvbios_therm_fan fan;
+ u32 divs, duty;
+
+ nvbios_fan_parse(bios, &fan);
+
+ if (!nouveau_boolopt(device->cfgopt, "NvFanPWM", func->param) ||
+ !therm->pwm_ctrl || fan.type == NVBIOS_THERM_FAN_TOGGLE ||
+ therm->pwm_get(therm, func->line, &divs, &duty) == -ENODEV)
+ return -ENODEV;
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ tpriv->fan = &priv->base;
+ if (!priv)
+ return -ENOMEM;
+
+ priv->base.type = "PWM";
+ priv->base.get = nouveau_fanpwm_get;
+ priv->base.set = nouveau_fanpwm_set;
+ priv->func = *func;
+ return 0;
+}