diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/iccsense.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bios/iccsense.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/iccsense.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/iccsense.c new file mode 100644 index 000000000..dea444d48 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/iccsense.c @@ -0,0 +1,129 @@ +/* + * Copyright 2015 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/extdev.h> +#include <subdev/bios/iccsense.h> + +static u32 +nvbios_iccsense_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, + u8 *len) +{ + struct bit_entry bit_P; + u32 iccsense; + + if (bit_entry(bios, 'P', &bit_P) || bit_P.version != 2 || + bit_P.length < 0x2c) + return 0; + + iccsense = nvbios_rd32(bios, bit_P.offset + 0x28); + if (!iccsense) + return 0; + + *ver = nvbios_rd08(bios, iccsense + 0); + switch (*ver) { + case 0x10: + case 0x20: + *hdr = nvbios_rd08(bios, iccsense + 1); + *len = nvbios_rd08(bios, iccsense + 2); + *cnt = nvbios_rd08(bios, iccsense + 3); + return iccsense; + default: + break; + } + + return 0; +} + +int +nvbios_iccsense_parse(struct nvkm_bios *bios, struct nvbios_iccsense *iccsense) +{ + struct nvkm_subdev *subdev = &bios->subdev; + u8 ver, hdr, cnt, len, i; + u32 table, entry; + + table = nvbios_iccsense_table(bios, &ver, &hdr, &cnt, &len); + if (!table || !cnt) + return -EINVAL; + + if (ver != 0x10 && ver != 0x20) { + nvkm_error(subdev, "ICCSENSE version 0x%02x unknown\n", ver); + return -EINVAL; + } + + iccsense->nr_entry = cnt; + iccsense->rail = kmalloc_array(cnt, sizeof(struct pwr_rail_t), + GFP_KERNEL); + if (!iccsense->rail) + return -ENOMEM; + + for (i = 0; i < cnt; ++i) { + struct nvbios_extdev_func extdev; + struct pwr_rail_t *rail = &iccsense->rail[i]; + u8 res_start = 0; + int r; + + entry = table + hdr + i * len; + + switch(ver) { + case 0x10: + if ((nvbios_rd08(bios, entry + 0x1) & 0xf8) == 0xf8) + rail->mode = 1; + else + rail->mode = 0; + rail->extdev_id = nvbios_rd08(bios, entry + 0x2); + res_start = 0x3; + break; + case 0x20: + rail->mode = nvbios_rd08(bios, entry); + rail->extdev_id = nvbios_rd08(bios, entry + 0x1); + res_start = 0x5; + break; + } + + if (nvbios_extdev_parse(bios, rail->extdev_id, &extdev)) + continue; + + switch (extdev.type) { + case NVBIOS_EXTDEV_INA209: + case NVBIOS_EXTDEV_INA219: + rail->resistor_count = 1; + break; + case NVBIOS_EXTDEV_INA3221: + rail->resistor_count = 3; + break; + default: + rail->resistor_count = 0; + break; + } + + for (r = 0; r < rail->resistor_count; ++r) { + rail->resistors[r].mohm = nvbios_rd08(bios, entry + res_start + r * 2); + rail->resistors[r].enabled = !(nvbios_rd08(bios, entry + res_start + r * 2 + 1) & 0x40); + } + rail->config = nvbios_rd16(bios, entry + res_start + rail->resistor_count * 2); + } + + return 0; +} |