1 files changed, 110 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 000000000..340f37a29
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/fanpwm.c
@@ -0,0 +1,110 @@
+/*
+ * 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 "priv.h"
+
+#include <core/option.h>
+#include <subdev/bios.h>
+#include <subdev/bios/fan.h>
+#include <subdev/gpio.h>
+
+struct nvkm_fanpwm {
+	struct nvkm_fan base;
+	struct dcb_gpio_func func;
+};
+
+static int
+nvkm_fanpwm_get(struct nvkm_therm *therm)
+{
+	struct nvkm_fanpwm *fan = (void *)therm->fan;
+	struct nvkm_device *device = therm->subdev.device;
+	struct nvkm_gpio *gpio = device->gpio;
+	int card_type = device->card_type;
+	u32 divs, duty;
+	int ret;
+
+	ret = therm->func->pwm_get(therm, fan->func.line, &divs, &duty);
+	if (ret == 0 && divs) {
+		divs = max(divs, duty);
+		if (card_type <= NV_40 || (fan->func.log[0] & 1))
+			duty = divs - duty;
+		return (duty * 100) / divs;
+	}
+
+	return nvkm_gpio_get(gpio, 0, fan->func.func, fan->func.line) * 100;
+}
+
+static int
+nvkm_fanpwm_set(struct nvkm_therm *therm, int percent)
+{
+	struct nvkm_fanpwm *fan = (void *)therm->fan;
+	int card_type = therm->subdev.device->card_type;
+	u32 divs, duty;
+	int ret;
+
+	divs = fan->base.perf.pwm_divisor;
+	if (fan->base.bios.pwm_freq) {
+		divs = 1;
+		if (therm->func->pwm_clock)
+			divs = therm->func->pwm_clock(therm, fan->func.line);
+		divs /= fan->base.bios.pwm_freq;
+	}
+
+	duty = ((divs * percent) + 99) / 100;
+	if (card_type <= NV_40 || (fan->func.log[0] & 1))
+		duty = divs - duty;
+
+	ret = therm->func->pwm_set(therm, fan->func.line, divs, duty);
+	if (ret == 0)
+		ret = therm->func->pwm_ctrl(therm, fan->func.line, true);
+	return ret;
+}
+
+int
+nvkm_fanpwm_create(struct nvkm_therm *therm, struct dcb_gpio_func *func)
+{
+	struct nvkm_device *device = therm->subdev.device;
+	struct nvkm_bios *bios = device->bios;
+	struct nvkm_fanpwm *fan;
+	struct nvbios_therm_fan info = {};
+	u32 divs, duty;
+
+	nvbios_fan_parse(bios, &info);
+
+	if (!nvkm_boolopt(device->cfgopt, "NvFanPWM", func->param) ||
+	    !therm->func->pwm_ctrl || info.type == NVBIOS_THERM_FAN_TOGGLE ||
+	     therm->func->pwm_get(therm, func->line, &divs, &duty) == -ENODEV)
+		return -ENODEV;
+
+	fan = kzalloc(sizeof(*fan), GFP_KERNEL);
+	therm->fan = &fan->base;
+	if (!fan)
+		return -ENOMEM;
+
+	fan->base.type = "PWM";
+	fan->base.get = nvkm_fanpwm_get;
+	fan->base.set = nvkm_fanpwm_set;
+	fan->func = *func;
+	return 0;
+}