diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/volt.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bios/volt.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/volt.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/volt.c new file mode 100644 index 000000000000..bb590de4ecb2 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/volt.c @@ -0,0 +1,137 @@ +/* + * 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> + +u16 +nvbios_volt_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) +{ + struct bit_entry bit_P; + u16 volt = 0x0000; + + if (!bit_entry(bios, 'P', &bit_P)) { + if (bit_P.version == 2) + volt = nv_ro16(bios, bit_P.offset + 0x0c); + else + if (bit_P.version == 1) + volt = nv_ro16(bios, bit_P.offset + 0x10); + + if (volt) { + *ver = nv_ro08(bios, volt + 0); + switch (*ver) { + case 0x12: + *hdr = 5; + *cnt = nv_ro08(bios, volt + 2); + *len = nv_ro08(bios, volt + 1); + return volt; + case 0x20: + *hdr = nv_ro08(bios, volt + 1); + *cnt = nv_ro08(bios, volt + 2); + *len = nv_ro08(bios, volt + 3); + return volt; + case 0x30: + case 0x40: + case 0x50: + *hdr = nv_ro08(bios, volt + 1); + *cnt = nv_ro08(bios, volt + 3); + *len = nv_ro08(bios, volt + 2); + return volt; + } + } + } + + return 0x0000; +} + +u16 +nvbios_volt_parse(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len, + struct nvbios_volt *info) +{ + u16 volt = nvbios_volt_table(bios, ver, hdr, cnt, len); + memset(info, 0x00, sizeof(*info)); + switch (!!volt * *ver) { + case 0x12: + info->vidmask = nv_ro08(bios, volt + 0x04); + break; + case 0x20: + info->vidmask = nv_ro08(bios, volt + 0x05); + break; + case 0x30: + info->vidmask = nv_ro08(bios, volt + 0x04); + break; + case 0x40: + info->base = nv_ro32(bios, volt + 0x04); + info->step = nv_ro16(bios, volt + 0x08); + info->vidmask = nv_ro08(bios, volt + 0x0b); + /*XXX*/ + info->min = 0; + info->max = info->base; + break; + case 0x50: + info->vidmask = nv_ro08(bios, volt + 0x06); + info->min = nv_ro32(bios, volt + 0x0a); + info->max = nv_ro32(bios, volt + 0x0e); + info->base = nv_ro32(bios, volt + 0x12) & 0x00ffffff; + info->step = nv_ro16(bios, volt + 0x16); + break; + } + return volt; +} + +u16 +nvbios_volt_entry(struct nouveau_bios *bios, int idx, u8 *ver, u8 *len) +{ + u8 hdr, cnt; + u16 volt = nvbios_volt_table(bios, ver, &hdr, &cnt, len); + if (volt && idx < cnt) { + volt = volt + hdr + (idx * *len); + return volt; + } + return 0x0000; +} + +u16 +nvbios_volt_entry_parse(struct nouveau_bios *bios, int idx, u8 *ver, u8 *len, + struct nvbios_volt_entry *info) +{ + u16 volt = nvbios_volt_entry(bios, idx, ver, len); + memset(info, 0x00, sizeof(*info)); + switch (!!volt * *ver) { + case 0x12: + case 0x20: + info->voltage = nv_ro08(bios, volt + 0x00) * 10000; + info->vid = nv_ro08(bios, volt + 0x01); + break; + case 0x30: + info->voltage = nv_ro08(bios, volt + 0x00) * 10000; + info->vid = nv_ro08(bios, volt + 0x01) >> 2; + break; + case 0x40: + case 0x50: + break; + } + return volt; +} |