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Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/M0203.c')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/bios/M0203.c129
1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/M0203.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/M0203.c
new file mode 100644
index 000000000..43f0ba1fb
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/M0203.c
@@ -0,0 +1,129 @@
+/*
+ * Copyright 2014 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/M0203.h>
+
+u32
+nvbios_M0203Te(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
+{
+ struct bit_entry bit_M;
+ u32 data = 0x00000000;
+
+ if (!bit_entry(bios, 'M', &bit_M)) {
+ if (bit_M.version == 2 && bit_M.length > 0x04)
+ data = nvbios_rd16(bios, bit_M.offset + 0x03);
+ if (data) {
+ *ver = nvbios_rd08(bios, data + 0x00);
+ switch (*ver) {
+ case 0x10:
+ *hdr = nvbios_rd08(bios, data + 0x01);
+ *len = nvbios_rd08(bios, data + 0x02);
+ *cnt = nvbios_rd08(bios, data + 0x03);
+ return data;
+ default:
+ break;
+ }
+ }
+ }
+
+ return 0x00000000;
+}
+
+u32
+nvbios_M0203Tp(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
+ struct nvbios_M0203T *info)
+{
+ u32 data = nvbios_M0203Te(bios, ver, hdr, cnt, len);
+ memset(info, 0x00, sizeof(*info));
+ switch (!!data * *ver) {
+ case 0x10:
+ info->type = nvbios_rd08(bios, data + 0x04);
+ info->pointer = nvbios_rd16(bios, data + 0x05);
+ break;
+ default:
+ break;
+ }
+ return data;
+}
+
+u32
+nvbios_M0203Ee(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr)
+{
+ u8 cnt, len;
+ u32 data = nvbios_M0203Te(bios, ver, hdr, &cnt, &len);
+ if (data && idx < cnt) {
+ data = data + *hdr + idx * len;
+ *hdr = len;
+ return data;
+ }
+ return 0x00000000;
+}
+
+u32
+nvbios_M0203Ep(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
+ struct nvbios_M0203E *info)
+{
+ u32 data = nvbios_M0203Ee(bios, idx, ver, hdr);
+ memset(info, 0x00, sizeof(*info));
+ switch (!!data * *ver) {
+ case 0x10:
+ info->type = (nvbios_rd08(bios, data + 0x00) & 0x0f) >> 0;
+ info->strap = (nvbios_rd08(bios, data + 0x00) & 0xf0) >> 4;
+ info->group = (nvbios_rd08(bios, data + 0x01) & 0x0f) >> 0;
+ return data;
+ default:
+ break;
+ }
+ return 0x00000000;
+}
+
+u32
+nvbios_M0203Em(struct nvkm_bios *bios, u8 ramcfg, u8 *ver, u8 *hdr,
+ struct nvbios_M0203E *info)
+{
+ struct nvkm_subdev *subdev = &bios->subdev;
+ struct nvbios_M0203T M0203T;
+ u8 cnt, len, idx = 0xff;
+ u32 data;
+
+ if (!nvbios_M0203Tp(bios, ver, hdr, &cnt, &len, &M0203T)) {
+ nvkm_warn(subdev, "M0203T not found\n");
+ return 0x00000000;
+ }
+
+ while ((data = nvbios_M0203Ep(bios, ++idx, ver, hdr, info))) {
+ switch (M0203T.type) {
+ case M0203T_TYPE_RAMCFG:
+ if (info->strap != ramcfg)
+ continue;
+ return data;
+ default:
+ nvkm_warn(subdev, "M0203T type %02x\n", M0203T.type);
+ return 0x00000000;
+ }
+ }
+
+ return data;
+}