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path: root/drivers/gpu/drm/nouveau/nvkm/subdev/bios/cstep.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/cstep.c')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/bios/cstep.c122
1 files changed, 122 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/cstep.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/cstep.c
new file mode 100644
index 000000000..7c8c36054
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/cstep.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright 2013 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/cstep.h>
+
+u32
+nvbios_cstepTe(struct nvkm_bios *bios,
+ u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *xnr, u8 *xsz)
+{
+ struct bit_entry bit_P;
+ u32 cstep = 0;
+
+ if (!bit_entry(bios, 'P', &bit_P)) {
+ if (bit_P.version == 2 && bit_P.length >= 0x38)
+ cstep = nvbios_rd32(bios, bit_P.offset + 0x34);
+
+ if (cstep) {
+ *ver = nvbios_rd08(bios, cstep + 0);
+ switch (*ver) {
+ case 0x10:
+ *hdr = nvbios_rd08(bios, cstep + 1);
+ *cnt = nvbios_rd08(bios, cstep + 3);
+ *len = nvbios_rd08(bios, cstep + 2);
+ *xnr = nvbios_rd08(bios, cstep + 5);
+ *xsz = nvbios_rd08(bios, cstep + 4);
+ return cstep;
+ default:
+ break;
+ }
+ }
+ }
+
+ return 0;
+}
+
+u32
+nvbios_cstepEe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr)
+{
+ u8 cnt, len, xnr, xsz;
+ u32 data = nvbios_cstepTe(bios, ver, hdr, &cnt, &len, &xnr, &xsz);
+ if (data && idx < cnt) {
+ data = data + *hdr + (idx * len);
+ *hdr = len;
+ return data;
+ }
+ return 0;
+}
+
+u32
+nvbios_cstepEp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
+ struct nvbios_cstepE *info)
+{
+ u32 data = nvbios_cstepEe(bios, idx, ver, hdr);
+ memset(info, 0x00, sizeof(*info));
+ if (data) {
+ info->pstate = (nvbios_rd16(bios, data + 0x00) & 0x01e0) >> 5;
+ info->index = nvbios_rd08(bios, data + 0x03);
+ }
+ return data;
+}
+
+u32
+nvbios_cstepEm(struct nvkm_bios *bios, u8 pstate, u8 *ver, u8 *hdr,
+ struct nvbios_cstepE *info)
+{
+ u32 data, idx = 0;
+ while ((data = nvbios_cstepEp(bios, idx++, ver, hdr, info))) {
+ if (info->pstate == pstate)
+ break;
+ }
+ return data;
+}
+
+u32
+nvbios_cstepXe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr)
+{
+ u8 cnt, len, xnr, xsz;
+ u32 data = nvbios_cstepTe(bios, ver, hdr, &cnt, &len, &xnr, &xsz);
+ if (data && idx < xnr) {
+ data = data + *hdr + (cnt * len) + (idx * xsz);
+ *hdr = xsz;
+ return data;
+ }
+ return 0;
+}
+
+u32
+nvbios_cstepXp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
+ struct nvbios_cstepX *info)
+{
+ u32 data = nvbios_cstepXe(bios, idx, ver, hdr);
+ memset(info, 0x00, sizeof(*info));
+ if (data) {
+ info->freq = nvbios_rd16(bios, data + 0x00) * 1000;
+ info->unkn[0] = nvbios_rd08(bios, data + 0x02);
+ info->unkn[1] = nvbios_rd08(bios, data + 0x03);
+ info->voltage = nvbios_rd08(bios, data + 0x04);
+ }
+ return data;
+}