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+/*
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+ * Copyright 2012 Red Hat Inc.
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+ *
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+ * Permission is hereby granted, free of charge, to any person obtaining a
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+ * copy of this software and associated documentation files (the "Software"),
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+ * to deal in the Software without restriction, including without limitation
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+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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+ * and/or sell copies of the Software, and to permit persons to whom the
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+ * Software is furnished to do so, subject to the following conditions:
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+ *
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+ * The above copyright notice and this permission notice shall be included in
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+ * all copies or substantial portions of the Software.
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+ *
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+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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+ * OTHER DEALINGS IN THE SOFTWARE.
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+ *
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+ * Authors: Ben Skeggs
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+ */
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+
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+#include <subdev/bios.h>
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+#include <subdev/bios/bit.h>
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+#include <subdev/bios/disp.h>
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+
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+u16
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+nvbios_disp_table(struct nouveau_bios *bios,
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+ u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *sub)
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+{
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+ struct bit_entry U;
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+
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+ if (!bit_entry(bios, 'U', &U)) {
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+ if (U.version == 1) {
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+ u16 data = nv_ro16(bios, U.offset);
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+ if (data) {
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+ *ver = nv_ro08(bios, data + 0x00);
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+ switch (*ver) {
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+ case 0x20:
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+ case 0x21:
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+ *hdr = nv_ro08(bios, data + 0x01);
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+ *len = nv_ro08(bios, data + 0x02);
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+ *cnt = nv_ro08(bios, data + 0x03);
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+ *sub = nv_ro08(bios, data + 0x04);
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+ return data;
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+ default:
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+ break;
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+ }
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+ }
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+ }
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+ }
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+
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+ return 0x0000;
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+}
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+
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+u16
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+nvbios_disp_entry(struct nouveau_bios *bios, u8 idx,
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+ u8 *ver, u8 *len, u8 *sub)
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+{
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+ u8 hdr, cnt;
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+ u16 data = nvbios_disp_table(bios, ver, &hdr, &cnt, len, sub);
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+ if (data && idx < cnt)
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+ return data + hdr + (idx * *len);
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+ *ver = 0x00;
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+ return 0x0000;
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+}
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+
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+u16
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+nvbios_disp_parse(struct nouveau_bios *bios, u8 idx,
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+ u8 *ver, u8 *len, u8 *sub,
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+ struct nvbios_disp *info)
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+{
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+ u16 data = nvbios_disp_entry(bios, idx, ver, len, sub);
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+ if (data && *len >= 2) {
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+ info->data = nv_ro16(bios, data + 0);
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+ return data;
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+ }
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+ return 0x0000;
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+}
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+
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+u16
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+nvbios_outp_entry(struct nouveau_bios *bios, u8 idx,
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+ u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
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+{
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+ struct nvbios_disp info;
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+ u16 data = nvbios_disp_parse(bios, idx, ver, len, hdr, &info);
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+ if (data) {
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+ *cnt = nv_ro08(bios, info.data + 0x05);
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+ *len = 0x06;
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+ data = info.data;
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+ }
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+ return data;
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+}
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+
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+u16
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+nvbios_outp_parse(struct nouveau_bios *bios, u8 idx,
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+ u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
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+ struct nvbios_outp *info)
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+{
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+ u16 data = nvbios_outp_entry(bios, idx, ver, hdr, cnt, len);
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+ if (data && *hdr >= 0x0a) {
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+ info->type = nv_ro16(bios, data + 0x00);
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+ info->mask = nv_ro32(bios, data + 0x02);
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+ if (*ver <= 0x20) /* match any link */
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+ info->mask |= 0x00c0;
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+ info->script[0] = nv_ro16(bios, data + 0x06);
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+ info->script[1] = nv_ro16(bios, data + 0x08);
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+ info->script[2] = 0x0000;
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+ if (*hdr >= 0x0c)
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+ info->script[2] = nv_ro16(bios, data + 0x0a);
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+ return data;
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+ }
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+ return 0x0000;
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+}
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+
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+u16
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+nvbios_outp_match(struct nouveau_bios *bios, u16 type, u16 mask,
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+ u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
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+ struct nvbios_outp *info)
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+{
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+ u16 data, idx = 0;
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+ while ((data = nvbios_outp_parse(bios, idx++, ver, hdr, cnt, len, info)) || *ver) {
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+ if (data && info->type == type) {
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+ if ((info->mask & mask) == mask)
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+ break;
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+ }
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+ }
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+ return data;
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+}
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+
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+u16
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+nvbios_ocfg_entry(struct nouveau_bios *bios, u16 outp, u8 idx,
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+ u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
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+{
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+ if (idx < *cnt)
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+ return outp + *hdr + (idx * *len);
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+ return 0x0000;
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+}
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+
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+u16
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+nvbios_ocfg_parse(struct nouveau_bios *bios, u16 outp, u8 idx,
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+ u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
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+ struct nvbios_ocfg *info)
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+{
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+ u16 data = nvbios_ocfg_entry(bios, outp, idx, ver, hdr, cnt, len);
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+ if (data) {
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+ info->match = nv_ro16(bios, data + 0x00);
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+ info->clkcmp[0] = nv_ro16(bios, data + 0x02);
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+ info->clkcmp[1] = nv_ro16(bios, data + 0x04);
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+ }
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+ return data;
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+}
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+
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+u16
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+nvbios_ocfg_match(struct nouveau_bios *bios, u16 outp, u16 type,
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+ u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
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+ struct nvbios_ocfg *info)
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+{
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+ u16 data, idx = 0;
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+ while ((data = nvbios_ocfg_parse(bios, outp, idx++, ver, hdr, cnt, len, info))) {
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+ if (info->match == type)
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+ break;
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+ }
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+ return data;
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+}
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+
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+u16
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+nvbios_oclk_match(struct nouveau_bios *bios, u16 cmp, u32 khz)
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+{
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+ while (cmp) {
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+ if (khz / 10 >= nv_ro16(bios, cmp + 0x00))
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+ return nv_ro16(bios, cmp + 0x02);
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+ cmp += 0x04;
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+ }
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+ return 0x0000;
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+}
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Ben Skeggs