diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/fan.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bios/fan.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/fan.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/fan.c new file mode 100644 index 000000000..0dfb15a27 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/fan.c @@ -0,0 +1,94 @@ +/* + * Copyright 2014 Martin Peres + * + * 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: Martin Peres + */ +#include <subdev/bios.h> +#include <subdev/bios/bit.h> +#include <subdev/bios/fan.h> + +static u32 +nvbios_fan_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) +{ + struct bit_entry bit_P; + u32 fan = 0; + + if (!bit_entry(bios, 'P', &bit_P)) { + if (bit_P.version == 2 && bit_P.length >= 0x5c) + fan = nvbios_rd32(bios, bit_P.offset + 0x58); + + if (fan) { + *ver = nvbios_rd08(bios, fan + 0); + switch (*ver) { + case 0x10: + *hdr = nvbios_rd08(bios, fan + 1); + *len = nvbios_rd08(bios, fan + 2); + *cnt = nvbios_rd08(bios, fan + 3); + return fan; + default: + break; + } + } + } + + return 0; +} + +static u32 +nvbios_fan_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr, + u8 *cnt, u8 *len) +{ + u32 data = nvbios_fan_table(bios, ver, hdr, cnt, len); + if (data && idx < *cnt) + return data + *hdr + (idx * (*len)); + return 0; +} + +u32 +nvbios_fan_parse(struct nvkm_bios *bios, struct nvbios_therm_fan *fan) +{ + u8 ver, hdr, cnt, len; + + u32 data = nvbios_fan_entry(bios, 0, &ver, &hdr, &cnt, &len); + if (data) { + u8 type = nvbios_rd08(bios, data + 0x00); + switch (type) { + case 0: + fan->type = NVBIOS_THERM_FAN_TOGGLE; + break; + case 1: + case 2: + /* TODO: Understand the difference between the two! */ + fan->type = NVBIOS_THERM_FAN_PWM; + break; + default: + fan->type = NVBIOS_THERM_FAN_UNK; + } + + fan->fan_mode = NVBIOS_THERM_FAN_LINEAR; + fan->min_duty = nvbios_rd08(bios, data + 0x02); + fan->max_duty = nvbios_rd08(bios, data + 0x03); + + fan->pwm_freq = nvbios_rd32(bios, data + 0x0b) & 0xffffff; + } + + return data; +} |