1 files changed, 69 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/bios/shadowrom.c b/drivers/gpu/drm/nouveau/core/subdev/bios/shadowrom.c
new file mode 100644
index 000000000000..b7992bc3ffa5
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/core/subdev/bios/shadowrom.c
@@ -0,0 +1,69 @@
+/*
+ * 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.
+ *
+ */
+
+#include "priv.h"
+
+static u32
+prom_read(void *data, u32 offset, u32 length, struct nouveau_bios *bios)
+{
+	u32 i;
+	if (offset + length <= 0x00100000) {
+		for (i = offset; i < offset + length; i += 4)
+			*(u32 *)&bios->data[i] = nv_rd32(bios, 0x300000 + i);
+		return length;
+	}
+	return 0;
+}
+
+static void
+prom_fini(void *data)
+{
+	struct nouveau_bios *bios = data;
+	if (nv_device(bios)->card_type < NV_50)
+		nv_mask(bios, 0x001850, 0x00000001, 0x00000001);
+	else
+		nv_mask(bios, 0x088050, 0x00000001, 0x00000001);
+}
+
+static void *
+prom_init(struct nouveau_bios *bios, const char *name)
+{
+	if (nv_device(bios)->card_type < NV_50) {
+		if (nv_device(bios)->card_type == NV_40 &&
+		    nv_device(bios)->chipset >= 0x4c)
+			return ERR_PTR(-ENODEV);
+		nv_mask(bios, 0x001850, 0x00000001, 0x00000000);
+	} else {
+		nv_mask(bios, 0x088050, 0x00000001, 0x00000000);
+	}
+	return bios;
+}
+
+const struct nvbios_source
+nvbios_rom = {
+	.name = "PROM",
+	.init = prom_init,
+	.fini = prom_fini,
+	.read = prom_read,
+	.rw = false,
+};