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/*
* 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/disp.h>
u16
nvbios_disp_table(struct nouveau_bios *bios,
u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *sub)
{
struct bit_entry U;
if (!bit_entry(bios, 'U', &U)) {
if (U.version == 1) {
u16 data = nv_ro16(bios, U.offset);
if (data) {
*ver = nv_ro08(bios, data + 0x00);
switch (*ver) {
case 0x20:
case 0x21:
case 0x22:
*hdr = nv_ro08(bios, data + 0x01);
*len = nv_ro08(bios, data + 0x02);
*cnt = nv_ro08(bios, data + 0x03);
*sub = nv_ro08(bios, data + 0x04);
return data;
default:
break;
}
}
}
}
return 0x0000;
}
u16
nvbios_disp_entry(struct nouveau_bios *bios, u8 idx,
u8 *ver, u8 *len, u8 *sub)
{
u8 hdr, cnt;
u16 data = nvbios_disp_table(bios, ver, &hdr, &cnt, len, sub);
if (data && idx < cnt)
return data + hdr + (idx * *len);
*ver = 0x00;
return 0x0000;
}
u16
nvbios_disp_parse(struct nouveau_bios *bios, u8 idx,
u8 *ver, u8 *len, u8 *sub,
struct nvbios_disp *info)
{
u16 data = nvbios_disp_entry(bios, idx, ver, len, sub);
if (data && *len >= 2) {
info->data = nv_ro16(bios, data + 0);
return data;
}
return 0x0000;
}
u16
nvbios_outp_entry(struct nouveau_bios *bios, u8 idx,
u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
{
struct nvbios_disp info;
u16 data = nvbios_disp_parse(bios, idx, ver, len, hdr, &info);
if (data) {
*cnt = nv_ro08(bios, info.data + 0x05);
*len = 0x06;
data = info.data;
}
return data;
}
u16
nvbios_outp_parse(struct nouveau_bios *bios, u8 idx,
u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
struct nvbios_outp *info)
{
u16 data = nvbios_outp_entry(bios, idx, ver, hdr, cnt, len);
if (data && *hdr >= 0x0a) {
info->type = nv_ro16(bios, data + 0x00);
info->mask = nv_ro32(bios, data + 0x02);
if (*ver <= 0x20) /* match any link */
info->mask |= 0x00c0;
info->script[0] = nv_ro16(bios, data + 0x06);
info->script[1] = nv_ro16(bios, data + 0x08);
info->script[2] = 0x0000;
if (*hdr >= 0x0c)
info->script[2] = nv_ro16(bios, data + 0x0a);
return data;
}
return 0x0000;
}
u16
nvbios_outp_match(struct nouveau_bios *bios, u16 type, u16 mask,
u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
struct nvbios_outp *info)
{
u16 data, idx = 0;
while ((data = nvbios_outp_parse(bios, idx++, ver, hdr, cnt, len, info)) || *ver) {
if (data && info->type == type) {
if ((info->mask & mask) == mask)
break;
}
}
return data;
}
u16
nvbios_ocfg_entry(struct nouveau_bios *bios, u16 outp, u8 idx,
u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
{
if (idx < *cnt)
return outp + *hdr + (idx * *len);
return 0x0000;
}
u16
nvbios_ocfg_parse(struct nouveau_bios *bios, u16 outp, u8 idx,
u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
struct nvbios_ocfg *info)
{
u16 data = nvbios_ocfg_entry(bios, outp, idx, ver, hdr, cnt, len);
if (data) {
info->match = nv_ro16(bios, data + 0x00);
info->clkcmp[0] = nv_ro16(bios, data + 0x02);
info->clkcmp[1] = nv_ro16(bios, data + 0x04);
}
return data;
}
u16
nvbios_ocfg_match(struct nouveau_bios *bios, u16 outp, u16 type,
u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
struct nvbios_ocfg *info)
{
u16 data, idx = 0;
while ((data = nvbios_ocfg_parse(bios, outp, idx++, ver, hdr, cnt, len, info))) {
if (info->match == type)
break;
}
return data;
}
u16
nvbios_oclk_match(struct nouveau_bios *bios, u16 cmp, u32 khz)
{
while (cmp) {
if (khz / 10 >= nv_ro16(bios, cmp + 0x00))
return nv_ro16(bios, cmp + 0x02);
cmp += 0x04;
}
return 0x0000;
}
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