nvd0/therm: implement more appropriate pwm fan control functions

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/Makefile

@@ -109,6 +109,7 @@ nouveau-y += core/subdev/therm/fan.o
 nouveau-y += core/subdev/therm/ic.o
 nouveau-y += core/subdev/therm/nv40.o
 nouveau-y += core/subdev/therm/nv50.o
+nouveau-y += core/subdev/therm/nvd0.o
 nouveau-y += core/subdev/therm/temp.o
 nouveau-y += core/subdev/timer/base.o
 nouveau-y += core/subdev/timer/nv04.o

drivers/gpu/drm/nouveau/core/include/subdev/therm.h

@@ -54,5 +54,6 @@ nouveau_therm(void *obj)
 
 extern struct nouveau_oclass nv40_therm_oclass;
 extern struct nouveau_oclass nv50_therm_oclass;
+extern struct nouveau_oclass nvd0_therm_oclass;
 
 #endif

drivers/gpu/drm/nouveau/core/subdev/device/nvc0.c

@@ -255,7 +255,7 @@ nvc0_identify(struct nouveau_device *device)
 		device->oclass[NVDEV_SUBDEV_GPIO   ] = &nvd0_gpio_oclass;
 		device->oclass[NVDEV_SUBDEV_I2C    ] = &nouveau_i2c_oclass;
 		device->oclass[NVDEV_SUBDEV_CLOCK  ] = &nvc0_clock_oclass;
-		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv50_therm_oclass;
+		device->oclass[NVDEV_SUBDEV_THERM  ] = &nvd0_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] = &nv50_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] = &nvc0_mc_oclass;

drivers/gpu/drm/nouveau/core/subdev/device/nve0.c

@@ -59,7 +59,7 @@ nve0_identify(struct nouveau_device *device)
 		device->oclass[NVDEV_SUBDEV_GPIO   ] = &nvd0_gpio_oclass;
 		device->oclass[NVDEV_SUBDEV_I2C    ] = &nouveau_i2c_oclass;
 		device->oclass[NVDEV_SUBDEV_CLOCK  ] = &nvc0_clock_oclass;
-		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv50_therm_oclass;
+		device->oclass[NVDEV_SUBDEV_THERM  ] = &nvd0_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] = &nv50_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] = &nvc0_mc_oclass;
@@ -87,7 +87,7 @@ nve0_identify(struct nouveau_device *device)
 		device->oclass[NVDEV_SUBDEV_GPIO   ] = &nvd0_gpio_oclass;
 		device->oclass[NVDEV_SUBDEV_I2C    ] = &nouveau_i2c_oclass;
 		device->oclass[NVDEV_SUBDEV_CLOCK  ] = &nvc0_clock_oclass;
-		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv50_therm_oclass;
+		device->oclass[NVDEV_SUBDEV_THERM  ] = &nvd0_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] = &nv50_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] = &nvc0_mc_oclass;
@@ -115,7 +115,7 @@ nve0_identify(struct nouveau_device *device)
 		device->oclass[NVDEV_SUBDEV_GPIO   ] = &nvd0_gpio_oclass;
 		device->oclass[NVDEV_SUBDEV_I2C    ] = &nouveau_i2c_oclass;
 		device->oclass[NVDEV_SUBDEV_CLOCK  ] = &nvc0_clock_oclass;
-		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv50_therm_oclass;
+		device->oclass[NVDEV_SUBDEV_THERM  ] = &nvd0_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] = &nv50_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] = &nvc0_mc_oclass;

drivers/gpu/drm/nouveau/core/subdev/therm/nvd0.c

+/*
+ * 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
+ */
+
+#include "priv.h"
+
+static int
+pwm_info(struct nouveau_therm *therm, int line)
+{
+	u32 gpio = nv_rd32(therm, 0x00d610 + (line * 0x04));
+	if (gpio & 0x00000040) {
+		switch (gpio & 0x0000001f) {
+		case 0x19: return 1;
+		case 0x1c: return 0;
+		default:
+			break;
+		}
+	}
+
+	nv_error(therm, "GPIO %d unknown PWM: 0x%08x\n", line, gpio);
+	return -EINVAL;
+}
+
+static int
+nvd0_fan_pwm_get(struct nouveau_therm *therm, int line, u32 *divs, u32 *duty)
+{
+	int indx = pwm_info(therm, line);
+	if (indx < 0)
+		return indx;
+
+	*divs = nv_rd32(therm, 0x00e114 + (indx * 8));
+	*duty = nv_rd32(therm, 0x00e118 + (indx * 8));
+	return 0;
+}
+
+static int
+nvd0_fan_pwm_set(struct nouveau_therm *therm, int line, u32 divs, u32 duty)
+{
+	int indx = pwm_info(therm, line);
+	if (indx < 0)
+		return indx;
+
+	nv_wr32(therm, 0x00e114 + (indx * 8), divs);
+	nv_wr32(therm, 0x00e118 + (indx * 8), duty | 0x80000000);
+	return 0;
+}
+
+static int
+nvd0_fan_pwm_clock(struct nouveau_therm *therm)
+{
+	return (nv_device(therm)->crystal * 1000) / 20;
+}
+
+static int
+nvd0_therm_ctor(struct nouveau_object *parent,
+		   struct nouveau_object *engine,
+		   struct nouveau_oclass *oclass, void *data, u32 size,
+		   struct nouveau_object **pobject)
+{
+	struct nouveau_therm_priv *priv;
+	struct nouveau_therm *therm;
+	int ret;
+
+	ret = nouveau_therm_create(parent, engine, oclass, &priv);
+	*pobject = nv_object(priv);
+	therm = (void *) priv;
+	if (ret)
+		return ret;
+
+	nouveau_therm_ic_ctor(therm);
+	nouveau_therm_sensor_ctor(therm);
+	nouveau_therm_fan_ctor(therm);
+
+	priv->fan.pwm_get = nvd0_fan_pwm_get;
+	priv->fan.pwm_set = nvd0_fan_pwm_set;
+	priv->fan.pwm_clock = nvd0_fan_pwm_clock;
+
+	therm->temp_get = nv50_temp_get;
+	therm->fan_get = nouveau_therm_fan_user_get;
+	therm->fan_set = nouveau_therm_fan_user_set;
+	therm->fan_sense = nouveau_therm_fan_sense;
+	therm->attr_get = nouveau_therm_attr_get;
+	therm->attr_set = nouveau_therm_attr_set;
+	return 0;
+}
+
+struct nouveau_oclass
+nvd0_therm_oclass = {
+	.handle = NV_SUBDEV(THERM, 0xd0),
+	.ofuncs = &(struct nouveau_ofuncs) {
+		.ctor = nvd0_therm_ctor,
+		.dtor = _nouveau_therm_dtor,
+		.init = nouveau_therm_init,
+		.fini = nouveau_therm_fini,
+	},
+};

drivers/gpu/drm/nouveau/core/subdev/therm/priv.h

+#ifndef __NVTHERM_PRIV_H__
+#define __NVTHERM_PRIV_H__
+
 /*
  * Copyright 2012 The Nouveau community
  *
@@ -71,3 +74,7 @@ int nouveau_therm_fan_set_mode(struct nouveau_therm *therm,
 
 
 int nouveau_therm_fan_sense(struct nouveau_therm *therm);
+
+int nv50_temp_get(struct nouveau_therm *therm);
+
+#endif