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      1 /*	$NetBSD: nouveau_nvkm_subdev_therm_gf119.c,v 1.3 2021/12/18 23:45:41 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2012 Red Hat Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors: Ben Skeggs
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_therm_gf119.c,v 1.3 2021/12/18 23:45:41 riastradh Exp $");
     28 
     29 #include "priv.h"
     30 
     31 static int
     32 pwm_info(struct nvkm_therm *therm, int line)
     33 {
     34 	struct nvkm_subdev *subdev = &therm->subdev;
     35 	struct nvkm_device *device = subdev->device;
     36 	u32 gpio = nvkm_rd32(device, 0x00d610 + (line * 0x04));
     37 
     38 	switch (gpio & 0x000000c0) {
     39 	case 0x00000000: /* normal mode, possibly pwm forced off by us */
     40 	case 0x00000040: /* nvio special */
     41 		switch (gpio & 0x0000001f) {
     42 		case 0x00: return 2;
     43 		case 0x19: return 1;
     44 		case 0x1c: return 0;
     45 		case 0x1e: return 2;
     46 		default:
     47 			break;
     48 		}
     49 	default:
     50 		break;
     51 	}
     52 
     53 	nvkm_error(subdev, "GPIO %d unknown PWM: %08x\n", line, gpio);
     54 	return -ENODEV;
     55 }
     56 
     57 int
     58 gf119_fan_pwm_ctrl(struct nvkm_therm *therm, int line, bool enable)
     59 {
     60 	struct nvkm_device *device = therm->subdev.device;
     61 	u32 data = enable ? 0x00000040 : 0x00000000;
     62 	int indx = pwm_info(therm, line);
     63 	if (indx < 0)
     64 		return indx;
     65 	else if (indx < 2)
     66 		nvkm_mask(device, 0x00d610 + (line * 0x04), 0x000000c0, data);
     67 	/* nothing to do for indx == 2, it seems hardwired to PTHERM */
     68 	return 0;
     69 }
     70 
     71 int
     72 gf119_fan_pwm_get(struct nvkm_therm *therm, int line, u32 *divs, u32 *duty)
     73 {
     74 	struct nvkm_device *device = therm->subdev.device;
     75 	int indx = pwm_info(therm, line);
     76 	if (indx < 0)
     77 		return indx;
     78 	else if (indx < 2) {
     79 		if (nvkm_rd32(device, 0x00d610 + (line * 0x04)) & 0x00000040) {
     80 			*divs = nvkm_rd32(device, 0x00e114 + (indx * 8));
     81 			*duty = nvkm_rd32(device, 0x00e118 + (indx * 8));
     82 			return 0;
     83 		}
     84 	} else if (indx == 2) {
     85 		*divs = nvkm_rd32(device, 0x0200d8) & 0x1fff;
     86 		*duty = nvkm_rd32(device, 0x0200dc) & 0x1fff;
     87 		return 0;
     88 	}
     89 
     90 	return -EINVAL;
     91 }
     92 
     93 int
     94 gf119_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty)
     95 {
     96 	struct nvkm_device *device = therm->subdev.device;
     97 	int indx = pwm_info(therm, line);
     98 	if (indx < 0)
     99 		return indx;
    100 	else if (indx < 2) {
    101 		nvkm_wr32(device, 0x00e114 + (indx * 8), divs);
    102 		nvkm_wr32(device, 0x00e118 + (indx * 8), duty | 0x80000000);
    103 	} else if (indx == 2) {
    104 		nvkm_mask(device, 0x0200d8, 0x1fff, divs); /* keep the high bits */
    105 		nvkm_wr32(device, 0x0200dc, duty | 0x40000000);
    106 	}
    107 	return 0;
    108 }
    109 
    110 int
    111 gf119_fan_pwm_clock(struct nvkm_therm *therm, int line)
    112 {
    113 	struct nvkm_device *device = therm->subdev.device;
    114 	int indx = pwm_info(therm, line);
    115 	if (indx < 0)
    116 		return 0;
    117 	else if (indx < 2)
    118 		return (device->crystal * 1000) / 20;
    119 	else
    120 		return device->crystal * 1000 / 10;
    121 }
    122 
    123 void
    124 gf119_therm_init(struct nvkm_therm *therm)
    125 {
    126 	struct nvkm_device *device = therm->subdev.device;
    127 
    128 	g84_sensor_setup(therm);
    129 
    130 	/* enable fan tach, count revolutions per-second */
    131 	nvkm_mask(device, 0x00e720, 0x00000003, 0x00000002);
    132 	if (therm->fan->tach.func != DCB_GPIO_UNUSED) {
    133 		nvkm_mask(device, 0x00d79c, 0x000000ff, therm->fan->tach.line);
    134 		nvkm_wr32(device, 0x00e724, device->crystal * 1000);
    135 		nvkm_mask(device, 0x00e720, 0x00000001, 0x00000001);
    136 	}
    137 	nvkm_mask(device, 0x00e720, 0x00000002, 0x00000000);
    138 }
    139 
    140 static const struct nvkm_therm_func
    141 gf119_therm = {
    142 	.init = gf119_therm_init,
    143 	.fini = g84_therm_fini,
    144 	.pwm_ctrl = gf119_fan_pwm_ctrl,
    145 	.pwm_get = gf119_fan_pwm_get,
    146 	.pwm_set = gf119_fan_pwm_set,
    147 	.pwm_clock = gf119_fan_pwm_clock,
    148 	.temp_get = g84_temp_get,
    149 	.fan_sense = gt215_therm_fan_sense,
    150 	.program_alarms = nvkm_therm_program_alarms_polling,
    151 };
    152 
    153 int
    154 gf119_therm_new(struct nvkm_device *device, int index,
    155 	       struct nvkm_therm **ptherm)
    156 {
    157 	return nvkm_therm_new_(&gf119_therm, device, index, ptherm);
    158 }
    159