diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/cstep.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bios/cstep.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/cstep.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/cstep.c new file mode 100644 index 000000000..7c8c36054 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/cstep.c @@ -0,0 +1,122 @@ +/* + * Copyright 2013 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 + */ +#include <subdev/bios.h> +#include <subdev/bios/bit.h> +#include <subdev/bios/cstep.h> + +u32 +nvbios_cstepTe(struct nvkm_bios *bios, + u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *xnr, u8 *xsz) +{ + struct bit_entry bit_P; + u32 cstep = 0; + + if (!bit_entry(bios, 'P', &bit_P)) { + if (bit_P.version == 2 && bit_P.length >= 0x38) + cstep = nvbios_rd32(bios, bit_P.offset + 0x34); + + if (cstep) { + *ver = nvbios_rd08(bios, cstep + 0); + switch (*ver) { + case 0x10: + *hdr = nvbios_rd08(bios, cstep + 1); + *cnt = nvbios_rd08(bios, cstep + 3); + *len = nvbios_rd08(bios, cstep + 2); + *xnr = nvbios_rd08(bios, cstep + 5); + *xsz = nvbios_rd08(bios, cstep + 4); + return cstep; + default: + break; + } + } + } + + return 0; +} + +u32 +nvbios_cstepEe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr) +{ + u8 cnt, len, xnr, xsz; + u32 data = nvbios_cstepTe(bios, ver, hdr, &cnt, &len, &xnr, &xsz); + if (data && idx < cnt) { + data = data + *hdr + (idx * len); + *hdr = len; + return data; + } + return 0; +} + +u32 +nvbios_cstepEp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr, + struct nvbios_cstepE *info) +{ + u32 data = nvbios_cstepEe(bios, idx, ver, hdr); + memset(info, 0x00, sizeof(*info)); + if (data) { + info->pstate = (nvbios_rd16(bios, data + 0x00) & 0x01e0) >> 5; + info->index = nvbios_rd08(bios, data + 0x03); + } + return data; +} + +u32 +nvbios_cstepEm(struct nvkm_bios *bios, u8 pstate, u8 *ver, u8 *hdr, + struct nvbios_cstepE *info) +{ + u32 data, idx = 0; + while ((data = nvbios_cstepEp(bios, idx++, ver, hdr, info))) { + if (info->pstate == pstate) + break; + } + return data; +} + +u32 +nvbios_cstepXe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr) +{ + u8 cnt, len, xnr, xsz; + u32 data = nvbios_cstepTe(bios, ver, hdr, &cnt, &len, &xnr, &xsz); + if (data && idx < xnr) { + data = data + *hdr + (cnt * len) + (idx * xsz); + *hdr = xsz; + return data; + } + return 0; +} + +u32 +nvbios_cstepXp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr, + struct nvbios_cstepX *info) +{ + u32 data = nvbios_cstepXe(bios, idx, ver, hdr); + memset(info, 0x00, sizeof(*info)); + if (data) { + info->freq = nvbios_rd16(bios, data + 0x00) * 1000; + info->unkn[0] = nvbios_rd08(bios, data + 0x02); + info->unkn[1] = nvbios_rd08(bios, data + 0x03); + info->voltage = nvbios_rd08(bios, data + 0x04); + } + return data; +} |