diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/M0203.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bios/M0203.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/M0203.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/M0203.c new file mode 100644 index 000000000..43f0ba1fb --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/M0203.c @@ -0,0 +1,129 @@ +/* + * Copyright 2014 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/M0203.h> + +u32 +nvbios_M0203Te(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) +{ + struct bit_entry bit_M; + u32 data = 0x00000000; + + if (!bit_entry(bios, 'M', &bit_M)) { + if (bit_M.version == 2 && bit_M.length > 0x04) + data = nvbios_rd16(bios, bit_M.offset + 0x03); + if (data) { + *ver = nvbios_rd08(bios, data + 0x00); + switch (*ver) { + case 0x10: + *hdr = nvbios_rd08(bios, data + 0x01); + *len = nvbios_rd08(bios, data + 0x02); + *cnt = nvbios_rd08(bios, data + 0x03); + return data; + default: + break; + } + } + } + + return 0x00000000; +} + +u32 +nvbios_M0203Tp(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len, + struct nvbios_M0203T *info) +{ + u32 data = nvbios_M0203Te(bios, ver, hdr, cnt, len); + memset(info, 0x00, sizeof(*info)); + switch (!!data * *ver) { + case 0x10: + info->type = nvbios_rd08(bios, data + 0x04); + info->pointer = nvbios_rd16(bios, data + 0x05); + break; + default: + break; + } + return data; +} + +u32 +nvbios_M0203Ee(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr) +{ + u8 cnt, len; + u32 data = nvbios_M0203Te(bios, ver, hdr, &cnt, &len); + if (data && idx < cnt) { + data = data + *hdr + idx * len; + *hdr = len; + return data; + } + return 0x00000000; +} + +u32 +nvbios_M0203Ep(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr, + struct nvbios_M0203E *info) +{ + u32 data = nvbios_M0203Ee(bios, idx, ver, hdr); + memset(info, 0x00, sizeof(*info)); + switch (!!data * *ver) { + case 0x10: + info->type = (nvbios_rd08(bios, data + 0x00) & 0x0f) >> 0; + info->strap = (nvbios_rd08(bios, data + 0x00) & 0xf0) >> 4; + info->group = (nvbios_rd08(bios, data + 0x01) & 0x0f) >> 0; + return data; + default: + break; + } + return 0x00000000; +} + +u32 +nvbios_M0203Em(struct nvkm_bios *bios, u8 ramcfg, u8 *ver, u8 *hdr, + struct nvbios_M0203E *info) +{ + struct nvkm_subdev *subdev = &bios->subdev; + struct nvbios_M0203T M0203T; + u8 cnt, len, idx = 0xff; + u32 data; + + if (!nvbios_M0203Tp(bios, ver, hdr, &cnt, &len, &M0203T)) { + nvkm_warn(subdev, "M0203T not found\n"); + return 0x00000000; + } + + while ((data = nvbios_M0203Ep(bios, ++idx, ver, hdr, info))) { + switch (M0203T.type) { + case M0203T_TYPE_RAMCFG: + if (info->strap != ramcfg) + continue; + return data; + default: + nvkm_warn(subdev, "M0203T type %02x\n", M0203T.type); + return 0x00000000; + } + } + + return data; +} |