P0260.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/P0260.h>
 27
 28u32
 29nvbios_P0260Te(struct nvkm_bios *bios,
 30	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *xnr, u8 *xsz)
 31{
 32	struct bit_entry bit_P;
 33	u32 data = 0x00000000;
 34
 35	if (!bit_entry(bios, 'P', &bit_P)) {
 36		if (bit_P.version == 2 && bit_P.length > 0x63)
 37			data = nvbios_rd32(bios, bit_P.offset + 0x60);
 38		if (data) {
 39			*ver = nvbios_rd08(bios, data + 0);
 40			switch (*ver) {
 41			case 0x10:
 42				*hdr = nvbios_rd08(bios, data + 1);
 43				*cnt = nvbios_rd08(bios, data + 2);
 44				*len = 4;
 45				*xnr = nvbios_rd08(bios, data + 3);
 46				*xsz = 4;
 47				return data;
 48			default:
 49				break;
 50			}
 51		}
 52	}
 53
 54	return 0x00000000;
 55}
 56
 57u32
 58nvbios_P0260Ee(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
 59{
 60	u8  hdr, cnt, xnr, xsz;
 61	u32 data = nvbios_P0260Te(bios, ver, &hdr, &cnt, len, &xnr, &xsz);
 62	if (data && idx < cnt)
 63		return data + hdr + (idx * *len);
 64	return 0x00000000;
 65}
 66
 67u32
 68nvbios_P0260Ep(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len,
 69	       struct nvbios_P0260E *info)
 70{
 71	u32 data = nvbios_P0260Ee(bios, idx, ver, len);
 72	memset(info, 0x00, sizeof(*info));
 73	switch (!!data * *ver) {
 74	case 0x10:
 75		info->data = nvbios_rd32(bios, data);
 76		return data;
 77	default:
 78		break;
 79	}
 80	return 0x00000000;
 81}
 82
 83u32
 84nvbios_P0260Xe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *xsz)
 85{
 86	u8  hdr, cnt, len, xnr;
 87	u32 data = nvbios_P0260Te(bios, ver, &hdr, &cnt, &len, &xnr, xsz);
 88	if (data && idx < xnr)
 89		return data + hdr + (cnt * len) + (idx * *xsz);
 90	return 0x00000000;
 91}
 92
 93u32
 94nvbios_P0260Xp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
 95	       struct nvbios_P0260X *info)
 96{
 97	u32 data = nvbios_P0260Xe(bios, idx, ver, hdr);
 98	memset(info, 0x00, sizeof(*info));
 99	switch (!!data * *ver) {
100	case 0x10:
101		info->data = nvbios_rd32(bios, data);
102		return data;
103	default:
104		break;
105	}
106	return 0x00000000;
107}