disp.c

  1/*
  2 * Copyright 2012 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/disp.h>
 27
 28u16
 29nvbios_disp_table(struct nvkm_bios *bios,
 30		  u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *sub)
 31{
 32	struct bit_entry U;
 33
 34	if (!bit_entry(bios, 'U', &U)) {
 35		if (U.version == 1) {
 36			u16 data = nvbios_rd16(bios, U.offset);
 37			if (data) {
 38				*ver = nvbios_rd08(bios, data + 0x00);
 39				switch (*ver) {
 40				case 0x20:
 41				case 0x21:
 42				case 0x22:
 43					*hdr = nvbios_rd08(bios, data + 0x01);
 44					*len = nvbios_rd08(bios, data + 0x02);
 45					*cnt = nvbios_rd08(bios, data + 0x03);
 46					*sub = nvbios_rd08(bios, data + 0x04);
 47					return data;
 48				default:
 49					break;
 50				}
 51			}
 52		}
 53	}
 54
 55	return 0x0000;
 56}
 57
 58u16
 59nvbios_disp_entry(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len, u8 *sub)
 60{
 61	u8  hdr, cnt;
 62	u16 data = nvbios_disp_table(bios, ver, &hdr, &cnt, len, sub);
 63	if (data && idx < cnt)
 64		return data + hdr + (idx * *len);
 65	*ver = 0x00;
 66	return 0x0000;
 67}
 68
 69u16
 70nvbios_disp_parse(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len, u8 *sub,
 71		  struct nvbios_disp *info)
 72{
 73	u16 data = nvbios_disp_entry(bios, idx, ver, len, sub);
 74	if (data && *len >= 2) {
 75		info->data = nvbios_rd16(bios, data + 0);
 76		return data;
 77	}
 78	return 0x0000;
 79}
 80
 81u16
 82nvbios_outp_entry(struct nvkm_bios *bios, u8 idx,
 83		  u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
 84{
 85	struct nvbios_disp info;
 86	u16 data = nvbios_disp_parse(bios, idx, ver, len, hdr, &info);
 87	if (data) {
 88		*cnt = nvbios_rd08(bios, info.data + 0x05);
 89		*len = 0x06;
 90		data = info.data;
 91	}
 92	return data;
 93}
 94
 95u16
 96nvbios_outp_parse(struct nvkm_bios *bios, u8 idx,
 97		  u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_outp *info)
 98{
 99	u16 data = nvbios_outp_entry(bios, idx, ver, hdr, cnt, len);
100	if (data && *hdr >= 0x0a) {
101		info->type      = nvbios_rd16(bios, data + 0x00);
102		info->mask      = nvbios_rd32(bios, data + 0x02);
103		if (*ver <= 0x20) /* match any link */
104			info->mask |= 0x00c0;
105		info->script[0] = nvbios_rd16(bios, data + 0x06);
106		info->script[1] = nvbios_rd16(bios, data + 0x08);
107		info->script[2] = 0x0000;
108		if (*hdr >= 0x0c)
109			info->script[2] = nvbios_rd16(bios, data + 0x0a);
110		return data;
111	}
112	return 0x0000;
113}
114
115u16
116nvbios_outp_match(struct nvkm_bios *bios, u16 type, u16 mask,
117		  u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_outp *info)
118{
119	u16 data, idx = 0;
120	while ((data = nvbios_outp_parse(bios, idx++, ver, hdr, cnt, len, info)) || *ver) {
121		if (data && info->type == type) {
122			if ((info->mask & mask) == mask)
123				break;
124		}
125	}
126	return data;
127}
128
129u16
130nvbios_ocfg_entry(struct nvkm_bios *bios, u16 outp, u8 idx,
131		  u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
132{
133	if (idx < *cnt)
134		return outp + *hdr + (idx * *len);
135	return 0x0000;
136}
137
138u16
139nvbios_ocfg_parse(struct nvkm_bios *bios, u16 outp, u8 idx,
140		  u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_ocfg *info)
141{
142	u16 data = nvbios_ocfg_entry(bios, outp, idx, ver, hdr, cnt, len);
143	if (data) {
144		info->proto     = nvbios_rd08(bios, data + 0x00);
145		info->flags     = nvbios_rd16(bios, data + 0x01);
146		info->clkcmp[0] = nvbios_rd16(bios, data + 0x02);
147		info->clkcmp[1] = nvbios_rd16(bios, data + 0x04);
148	}
149	return data;
150}
151
152u16
153nvbios_ocfg_match(struct nvkm_bios *bios, u16 outp, u8 proto, u8 flags,
154		  u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_ocfg *info)
155{
156	u16 data, idx = 0;
157	while ((data = nvbios_ocfg_parse(bios, outp, idx++, ver, hdr, cnt, len, info))) {
158		if ((info->proto == proto || info->proto == 0xff) &&
159		    (info->flags == flags))
160			break;
161	}
162	return data;
163}
164
165u16
166nvbios_oclk_match(struct nvkm_bios *bios, u16 cmp, u32 khz)
167{
168	while (cmp) {
169		if (khz / 10 >= nvbios_rd16(bios, cmp + 0x00))
170			return  nvbios_rd16(bios, cmp + 0x02);
171		cmp += 0x04;
172	}
173	return 0x0000;
174}