M0205.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/M0205.h>
 27
 28u32
 29nvbios_M0205Te(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 > 0x08)
 37			data = nvbios_rd32(bios, bit_M.offset + 0x05);
 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 = nvbios_rd08(bios, data + 0x04);
 46				*cnt = nvbios_rd08(bios, data + 0x05);
 47				return data;
 48			default:
 49				break;
 50			}
 51		}
 52	}
 53
 54	return 0x00000000;
 55}
 56
 57u32
 58nvbios_M0205Tp(struct nvkm_bios *bios,
 59	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz,
 60	       struct nvbios_M0205T *info)
 61{
 62	u32 data = nvbios_M0205Te(bios, ver, hdr, cnt, len, snr, ssz);
 63	memset(info, 0x00, sizeof(*info));
 64	switch (!!data * *ver) {
 65	case 0x10:
 66		info->freq = nvbios_rd16(bios, data + 0x06);
 67		break;
 68	default:
 69		break;
 70	}
 71	return data;
 72}
 73
 74u32
 75nvbios_M0205Ee(struct nvkm_bios *bios, int idx,
 76	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
 77{
 78	u8  snr, ssz;
 79	u32 data = nvbios_M0205Te(bios, ver, hdr, cnt, len, &snr, &ssz);
 80	if (data && idx < *cnt) {
 81		data = data + *hdr + idx * (*len + (snr * ssz));
 82		*hdr = *len;
 83		*cnt = snr;
 84		*len = ssz;
 85		return data;
 86	}
 87	return 0x00000000;
 88}
 89
 90u32
 91nvbios_M0205Ep(struct nvkm_bios *bios, int idx,
 92	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
 93	       struct nvbios_M0205E *info)
 94{
 95	u32 data = nvbios_M0205Ee(bios, idx, ver, hdr, cnt, len);
 96	memset(info, 0x00, sizeof(*info));
 97	switch (!!data * *ver) {
 98	case 0x10:
 99		info->type = nvbios_rd08(bios, data + 0x00) & 0x0f;
100		return data;
101	default:
102		break;
103	}
104	return 0x00000000;
105}
106
107u32
108nvbios_M0205Se(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr)
109{
110
111	u8  cnt, len;
112	u32 data = nvbios_M0205Ee(bios, ent, ver, hdr, &cnt, &len);
113	if (data && idx < cnt) {
114		data = data + *hdr + idx * len;
115		*hdr = len;
116		return data;
117	}
118	return 0x00000000;
119}
120
121u32
122nvbios_M0205Sp(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr,
123	       struct nvbios_M0205S *info)
124{
125	u32 data = nvbios_M0205Se(bios, ent, idx, ver, hdr);
126	memset(info, 0x00, sizeof(*info));
127	switch (!!data * *ver) {
128	case 0x10:
129		info->data = nvbios_rd08(bios, data + 0x00);
130		return data;
131	default:
132		break;
133	}
134	return 0x00000000;
135}