cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/nouveau/nvkm/subdev/therm/nv50.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
 *          Martin Peres
 */
#include "priv.h"


static int pwm_info(struct nvkm_therm *therm, int *line, int *ctrl, int *indx) { struct nvkm_subdev *subdev = &therm->subdev; if (*line == 0x04) { *ctrl = 0x00e100; *line = 4; *indx = 0; } else if (*line == 0x09) { *ctrl = 0x00e100; *line = 9; *indx = 1; } else if (*line == 0x10) { *ctrl = 0x00e28c; *line = 0; *indx = 0; } else { nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", *line); return -ENODEV; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Peres11489.76%133.33%
Ben Skeggs1310.24%266.67%
Total127100.00%3100.00%


int nv50_fan_pwm_ctrl(struct nvkm_therm *therm, int line, bool enable) { struct nvkm_device *device = therm->subdev.device; u32 data = enable ? 0x00000001 : 0x00000000; int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); if (ret == 0) nvkm_mask(device, ctrl, 0x00010001 << line, data << line); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs8098.77%375.00%
Martin Peres11.23%125.00%
Total81100.00%4100.00%


int nv50_fan_pwm_get(struct nvkm_therm *therm, int line, u32 *divs, u32 *duty) { struct nvkm_device *device = therm->subdev.device; int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); if (ret) return ret; if (nvkm_rd32(device, ctrl) & (1 << line)) { *divs = nvkm_rd32(device, 0x00e114 + (id * 8)); *duty = nvkm_rd32(device, 0x00e118 + (id * 8)); return 0; } return -EINVAL; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Peres9783.62%125.00%
Ben Skeggs1916.38%375.00%
Total116100.00%4100.00%


int nv50_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty) { struct nvkm_device *device = therm->subdev.device; int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); if (ret) return ret; nvkm_wr32(device, 0x00e114 + (id * 8), divs); nvkm_wr32(device, 0x00e118 + (id * 8), duty | 0x80000000); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Peres7782.80%133.33%
Ben Skeggs1617.20%266.67%
Total93100.00%3100.00%


int nv50_fan_pwm_clock(struct nvkm_therm *therm, int line) { struct nvkm_device *device = therm->subdev.device; int pwm_clock; /* determine the PWM source clock */ if (device->chipset > 0x50 && device->chipset < 0x94) { u8 pwm_div = nvkm_rd32(device, 0x410c); if (nvkm_rd32(device, 0xc040) & 0x800000) { /* Use the HOST clock (100 MHz) * Where does this constant(2.4) comes from? */ pwm_clock = (100000000 >> pwm_div) * 10 / 24; } else { /* Where does this constant(20) comes from? */ pwm_clock = (device->crystal * 1000) >> pwm_div; pwm_clock /= 20; } } else { pwm_clock = (device->crystal * 1000) / 20; } return pwm_clock; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Peres9883.05%466.67%
Ben Skeggs2016.95%233.33%
Total118100.00%6100.00%


static void nv50_sensor_setup(struct nvkm_therm *therm) { struct nvkm_device *device = therm->subdev.device; nvkm_mask(device, 0x20010, 0x40000000, 0x0); mdelay(20); /* wait for the temperature to stabilize */ }

Contributors

PersonTokensPropCommitsCommitProp
Martin Peres2564.10%133.33%
Ben Skeggs1435.90%266.67%
Total39100.00%3100.00%


static int nv50_temp_get(struct nvkm_therm *therm) { struct nvkm_device *device = therm->subdev.device; struct nvbios_therm_sensor *sensor = &therm->bios_sensor; int core_temp; core_temp = nvkm_rd32(device, 0x20014) & 0x3fff; /* if the slope or the offset is unset, do no use the sensor */ if (!sensor->slope_div || !sensor->slope_mult || !sensor->offset_num || !sensor->offset_den) return -ENODEV; core_temp = core_temp * sensor->slope_mult / sensor->slope_div; core_temp = core_temp + sensor->offset_num / sensor->offset_den; core_temp = core_temp + sensor->offset_constant - 8; /* reserve negative temperatures for errors */ if (core_temp < 0) core_temp = 0; return core_temp; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Peres10586.78%342.86%
Ben Skeggs1613.22%457.14%
Total121100.00%7100.00%


static void nv50_therm_init(struct nvkm_therm *therm) { nv50_sensor_setup(therm); }

Contributors

PersonTokensPropCommitsCommitProp
Martin Peres956.25%133.33%
Ben Skeggs743.75%266.67%
Total16100.00%3100.00%

static const struct nvkm_therm_func nv50_therm = { .init = nv50_therm_init, .intr = nv40_therm_intr, .pwm_ctrl = nv50_fan_pwm_ctrl, .pwm_get = nv50_fan_pwm_get, .pwm_set = nv50_fan_pwm_set, .pwm_clock = nv50_fan_pwm_clock, .temp_get = nv50_temp_get, .program_alarms = nvkm_therm_program_alarms_polling, };
int nv50_therm_new(struct nvkm_device *device, int index, struct nvkm_therm **ptherm) { return nvkm_therm_new_(&nv50_therm, device, index, ptherm); }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs2165.62%266.67%
Martin Peres1134.38%133.33%
Total32100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Martin Peres55770.06%646.15%
Ben Skeggs23829.94%753.85%
Total795100.00%13100.00%
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