130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
/*
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* Copyright 2014 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Ben Skeggs
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*/
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#include <subdev/bios.h>
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#include <subdev/bios/bit.h>
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#include <subdev/bios/M0203.h>
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u32
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nvbios_M0203Te(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
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{
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struct bit_entry bit_M;
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u32 data = 0x00000000;
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if (!bit_entry(bios, 'M', &bit_M)) {
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if (bit_M.version == 2 && bit_M.length > 0x04)
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data = nvbios_rd16(bios, bit_M.offset + 0x03);
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if (data) {
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*ver = nvbios_rd08(bios, data + 0x00);
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switch (*ver) {
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case 0x10:
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*hdr = nvbios_rd08(bios, data + 0x01);
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*len = nvbios_rd08(bios, data + 0x02);
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*cnt = nvbios_rd08(bios, data + 0x03);
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return data;
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default:
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break;
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}
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}
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}
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return 0x00000000;
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}
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u32
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nvbios_M0203Tp(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
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struct nvbios_M0203T *info)
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{
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u32 data = nvbios_M0203Te(bios, ver, hdr, cnt, len);
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memset(info, 0x00, sizeof(*info));
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switch (!!data * *ver) {
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case 0x10:
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info->type = nvbios_rd08(bios, data + 0x04);
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info->pointer = nvbios_rd16(bios, data + 0x05);
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break;
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default:
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break;
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}
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return data;
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}
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u32
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nvbios_M0203Ee(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr)
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{
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u8 cnt, len;
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u32 data = nvbios_M0203Te(bios, ver, hdr, &cnt, &len);
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if (data && idx < cnt) {
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data = data + *hdr + idx * len;
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*hdr = len;
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return data;
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}
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return 0x00000000;
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}
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u32
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nvbios_M0203Ep(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
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struct nvbios_M0203E *info)
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{
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u32 data = nvbios_M0203Ee(bios, idx, ver, hdr);
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memset(info, 0x00, sizeof(*info));
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switch (!!data * *ver) {
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case 0x10:
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info->type = (nvbios_rd08(bios, data + 0x00) & 0x0f) >> 0;
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info->strap = (nvbios_rd08(bios, data + 0x00) & 0xf0) >> 4;
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info->group = (nvbios_rd08(bios, data + 0x01) & 0x0f) >> 0;
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return data;
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default:
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break;
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}
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return 0x00000000;
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}
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u32
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nvbios_M0203Em(struct nvkm_bios *bios, u8 ramcfg, u8 *ver, u8 *hdr,
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struct nvbios_M0203E *info)
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{
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struct nvkm_subdev *subdev = &bios->subdev;
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struct nvbios_M0203T M0203T;
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u8 cnt, len, idx = 0xff;
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u32 data;
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if (!nvbios_M0203Tp(bios, ver, hdr, &cnt, &len, &M0203T)) {
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nvkm_warn(subdev, "M0203T not found\n");
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return 0x00000000;
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}
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while ((data = nvbios_M0203Ep(bios, ++idx, ver, hdr, info))) {
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switch (M0203T.type) {
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case M0203T_TYPE_RAMCFG:
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if (info->strap != ramcfg)
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continue;
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return data;
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default:
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nvkm_warn(subdev, "M0203T type %02x\n", M0203T.type);
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return 0x00000000;
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}
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}
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return data;
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}
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