/*
* Copyright 2012 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/mxm.h>
u16
mxm_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr)
{
struct nvkm_subdev *subdev = &bios->subdev;
struct bit_entry x;
if (bit_entry(bios, 'x', &x)) {
nvkm_debug(subdev, "BIT 'x' table not present\n");
return 0x0000;
}
*ver = x.version;
*hdr = x.length;
if (*ver != 1 || *hdr < 3) {
nvkm_warn(subdev, "BIT 'x' table %d/%d unknown\n", *ver, *hdr);
return 0x0000;
}
return x.offset;
}
/* These map MXM v2.x digital connection values to the appropriate SOR/link,
* hopefully they're correct for all boards within the same chipset...
*
* MXM v3.x VBIOS are nicer and provide pointers to these tables.
*/
static u8 g84_sor_map[16] = {
0x00, 0x12, 0x22, 0x11, 0x32, 0x31, 0x11, 0x31,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
static u8 g92_sor_map[16] = {
0x00, 0x12, 0x22, 0x11, 0x32, 0x31, 0x11, 0x31,
0x11, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
static u8 g94_sor_map[16] = {
0x00, 0x14, 0x24, 0x11, 0x34, 0x31, 0x11, 0x31,
0x11, 0x31, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00
};
static u8 g98_sor_map[16] = {
0x00, 0x14, 0x12, 0x11, 0x00, 0x31, 0x11, 0x31,
0x11, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
u8
mxm_sor_map(struct nvkm_bios *bios, u8 conn)
{
struct nvkm_subdev *subdev = &bios->subdev;
u8 ver, hdr;
u16 mxm = mxm_table(bios, &ver, &hdr);
if (mxm && hdr >= 6) {
u16 map = nvbios_rd16(bios, mxm + 4);
if (map) {
ver = nvbios_rd08(bios, map);
if (ver == 0x10 || ver == 0x11) {
if (conn < nvbios_rd08(bios, map + 3)) {
map += nvbios_rd08(bios, map + 1);
map += conn;
return nvbios_rd08(bios, map);
}
return 0x00;
}
nvkm_warn(subdev, "unknown sor map v%02x\n", ver);
}
}
if (bios->version.chip == 0x84 || bios->version.chip == 0x86)
return g84_sor_map[conn];
if (bios->version.chip == 0x92)
return g92_sor_map[conn];
if (bios->version.chip == 0x94 || bios->version.chip == 0x96)
return g94_sor_map[conn];
if (bios->version.chip == 0x98)
return g98_sor_map[conn];
nvkm_warn(subdev, "missing sor map\n");
return 0x00;
}
u8
mxm_ddc_map(struct nvkm_bios *bios, u8 port)
{
struct nvkm_subdev *subdev = &bios->subdev;
u8 ver, hdr;
u16 mxm = mxm_table(bios, &ver, &hdr);
if (mxm && hdr >= 8) {
u16 map = nvbios_rd16(bios, mxm + 6);
if (map) {
ver = nvbios_rd08(bios, map);
if (ver == 0x10) {
if (port < nvbios_rd08(bios, map + 3)) {
map += nvbios_rd08(bios, map + 1);
map += port;
return nvbios_rd08(bios, map);
}
return 0x00;
}
nvkm_warn(subdev, "unknown ddc map v%02x\n", ver);
}
}
/* v2.x: directly write port as dcb i2cidx */
return (port << 4) | port;
}
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