M0209.c

  1/*
  2 * Copyright 2013 Red Hat Inc.
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining a
  5 * copy of this software and associated documentation files (the "Software"),
  6 * to deal in the Software without restriction, including without limitation
  7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8 * and/or sell copies of the Software, and to permit persons to whom the
  9 * Software is furnished to do so, subject to the following conditions:
 10 *
 11 * The above copyright notice and this permission notice shall be included in
 12 * all copies or substantial portions of the Software.
 13 *
 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 20 * OTHER DEALINGS IN THE SOFTWARE.
 21 *
 22 * Authors: Ben Skeggs
 23 */
 24#include <subdev/bios.h>
 25#include <subdev/bios/bit.h>
 26#include <subdev/bios/M0209.h>
 27
 28u32
 29nvbios_M0209Te(struct nvkm_bios *bios,
 30	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz)
 31{
 32	struct bit_entry bit_M;
 33	u32 data = 0x00000000;
 34
 35	if (!bit_entry(bios, 'M', &bit_M)) {
 36		if (bit_M.version == 2 && bit_M.length > 0x0c)
 37			data = nvbios_rd32(bios, bit_M.offset + 0x09);
 38		if (data) {
 39			*ver = nvbios_rd08(bios, data + 0x00);
 40			switch (*ver) {
 41			case 0x10:
 42				*hdr = nvbios_rd08(bios, data + 0x01);
 43				*len = nvbios_rd08(bios, data + 0x02);
 44				*ssz = nvbios_rd08(bios, data + 0x03);
 45				*snr = 1;
 46				*cnt = nvbios_rd08(bios, data + 0x04);
 47				return data;
 48			default:
 49				break;
 50			}
 51		}
 52	}
 53
 54	return 0x00000000;
 55}
 56
 57u32
 58nvbios_M0209Ee(struct nvkm_bios *bios, int idx,
 59	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
 60{
 61	u8  snr, ssz;
 62	u32 data = nvbios_M0209Te(bios, ver, hdr, cnt, len, &snr, &ssz);
 63	if (data && idx < *cnt) {
 64		data = data + *hdr + idx * (*len + (snr * ssz));
 65		*hdr = *len;
 66		*cnt = snr;
 67		*len = ssz;
 68		return data;
 69	}
 70	return 0x00000000;
 71}
 72
 73u32
 74nvbios_M0209Ep(struct nvkm_bios *bios, int idx,
 75	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_M0209E *info)
 76{
 77	u32 data = nvbios_M0209Ee(bios, idx, ver, hdr, cnt, len);
 78	memset(info, 0x00, sizeof(*info));
 79	switch (!!data * *ver) {
 80	case 0x10:
 81		info->v00_40 = (nvbios_rd08(bios, data + 0x00) & 0x40) >> 6;
 82		info->bits   =  nvbios_rd08(bios, data + 0x00) & 0x3f;
 83		info->modulo =  nvbios_rd08(bios, data + 0x01);
 84		info->v02_40 = (nvbios_rd08(bios, data + 0x02) & 0x40) >> 6;
 85		info->v02_07 =  nvbios_rd08(bios, data + 0x02) & 0x07;
 86		info->v03    =  nvbios_rd08(bios, data + 0x03);
 87		return data;
 88	default:
 89		break;
 90	}
 91	return 0x00000000;
 92}
 93
 94u32
 95nvbios_M0209Se(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr)
 96{
 97
 98	u8  cnt, len;
 99	u32 data = nvbios_M0209Ee(bios, ent, ver, hdr, &cnt, &len);
100	if (data && idx < cnt) {
101		data = data + *hdr + idx * len;
102		*hdr = len;
103		return data;
104	}
105	return 0x00000000;
106}
107
108u32
109nvbios_M0209Sp(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr,
110	       struct nvbios_M0209S *info)
111{
112	struct nvbios_M0209E M0209E;
113	u8  cnt, len;
114	u32 data = nvbios_M0209Ep(bios, ent, ver, hdr, &cnt, &len, &M0209E);
115	if (data) {
116		u32 i, data = nvbios_M0209Se(bios, ent, idx, ver, hdr);
117		memset(info, 0x00, sizeof(*info));
118		switch (!!data * *ver) {
119		case 0x10:
120			for (i = 0; i < ARRAY_SIZE(info->data); i++) {
121				u32 bits = (i % M0209E.modulo) * M0209E.bits;
122				u32 mask = (1ULL << M0209E.bits) - 1;
123				u16  off = bits / 8;
124				u8   mod = bits % 8;
125				info->data[i] = nvbios_rd32(bios, data + off);
126				info->data[i] = info->data[i] >> mod;
127				info->data[i] = info->data[i] & mask;
128			}
129			return data;
130		default:
131			break;
132		}
133	}
134	return 0x00000000;
135}