cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/nouveau/nvkm/subdev/bios/volt.c

/*
 * Copyright 2012 Nouveau Community
 *
 * 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/volt.h>


u32 nvbios_volt_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) { struct bit_entry bit_P; u32 volt = 0; if (!bit_entry(bios, 'P', &bit_P)) { if (bit_P.version == 2) volt = nvbios_rd32(bios, bit_P.offset + 0x0c); else if (bit_P.version == 1) volt = nvbios_rd32(bios, bit_P.offset + 0x10); if (volt) { *ver = nvbios_rd08(bios, volt + 0); switch (*ver) { case 0x12: *hdr = 5; *cnt = nvbios_rd08(bios, volt + 2); *len = nvbios_rd08(bios, volt + 1); return volt; case 0x20: *hdr = nvbios_rd08(bios, volt + 1); *cnt = nvbios_rd08(bios, volt + 2); *len = nvbios_rd08(bios, volt + 3); return volt; case 0x30: case 0x40: case 0x50: *hdr = nvbios_rd08(bios, volt + 1); *cnt = nvbios_rd08(bios, volt + 3); *len = nvbios_rd08(bios, volt + 2); return volt; } } } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs246100.00%4100.00%
Total246100.00%4100.00%


u32 nvbios_volt_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_volt *info) { u32 volt = nvbios_volt_table(bios, ver, hdr, cnt, len); memset(info, 0x00, sizeof(*info)); switch (!!volt * *ver) { case 0x12: info->type = NVBIOS_VOLT_GPIO; info->vidmask = nvbios_rd08(bios, volt + 0x04); info->ranged = false; break; case 0x20: info->type = NVBIOS_VOLT_GPIO; info->vidmask = nvbios_rd08(bios, volt + 0x05); info->ranged = false; break; case 0x30: info->type = NVBIOS_VOLT_GPIO; info->vidmask = nvbios_rd08(bios, volt + 0x04); info->ranged = false; break; case 0x40: info->type = NVBIOS_VOLT_GPIO; info->base = nvbios_rd32(bios, volt + 0x04); info->step = nvbios_rd16(bios, volt + 0x08); info->vidmask = nvbios_rd08(bios, volt + 0x0b); info->ranged = true; /* XXX: find the flag byte */ /*XXX*/ info->min = 0; info->max = info->base; break; case 0x50: info->min = nvbios_rd32(bios, volt + 0x0a); info->max = nvbios_rd32(bios, volt + 0x0e); info->base = nvbios_rd32(bios, volt + 0x12) & 0x00ffffff; /* offset 4 seems to be a flag byte */ if (nvbios_rd32(bios, volt + 0x4) & 1) { info->type = NVBIOS_VOLT_PWM; info->pwm_freq = nvbios_rd32(bios, volt + 0x5) / 1000; info->pwm_range = nvbios_rd32(bios, volt + 0x16); } else { info->type = NVBIOS_VOLT_GPIO; info->vidmask = nvbios_rd08(bios, volt + 0x06); info->step = nvbios_rd16(bios, volt + 0x16); info->ranged = !!(nvbios_rd08(bios, volt + 0x4) & 0x2); } break; } return volt; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs24363.78%466.67%
Martin Peres9424.67%116.67%
Karol Herbst4411.55%116.67%
Total381100.00%6100.00%


u32 nvbios_volt_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len) { u8 hdr, cnt; u32 volt = nvbios_volt_table(bios, ver, &hdr, &cnt, len); if (volt && idx < cnt) { volt = volt + hdr + (idx * *len); return volt; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs73100.00%3100.00%
Total73100.00%3100.00%


u32 nvbios_volt_entry_parse(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len, struct nvbios_volt_entry *info) { u32 volt = nvbios_volt_entry(bios, idx, ver, len); memset(info, 0x00, sizeof(*info)); switch (!!volt * *ver) { case 0x12: case 0x20: info->voltage = nvbios_rd08(bios, volt + 0x00) * 10000; info->vid = nvbios_rd08(bios, volt + 0x01); break; case 0x30: info->voltage = nvbios_rd08(bios, volt + 0x00) * 10000; info->vid = nvbios_rd08(bios, volt + 0x01) >> 2; break; case 0x40: break; case 0x50: info->voltage = nvbios_rd32(bios, volt) & 0x001fffff; info->vid = (nvbios_rd32(bios, volt) >> 23) & 0xff; break; } return volt; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs14382.18%480.00%
Karol Herbst3117.82%120.00%
Total174100.00%5100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs71580.88%457.14%
Martin Peres9410.63%114.29%
Karol Herbst758.48%228.57%
Total884100.00%7100.00%
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