1 files changed, 62 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nv40_fb.c b/drivers/gpu/drm/nouveau/nv40_fb.c
new file mode 100644
index 000000000000..ca1d27107a8e
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nv40_fb.c
@@ -0,0 +1,62 @@
+#include "drmP.h"
+#include "drm.h"
+#include "nouveau_drv.h"
+#include "nouveau_drm.h"
+
+int
+nv40_fb_init(struct drm_device *dev)
+{
+        struct drm_nouveau_private *dev_priv = dev->dev_private;
+        uint32_t fb_bar_size, tmp;
+        int num_tiles;
+        int i;
+
+        /* This is strictly a NV4x register (don't know about NV5x). */
+        /* The blob sets these to all kinds of values, and they mess up our setup. */
+        /* I got value 0x52802 instead. For some cards the blob even sets it back to 0x1. */
+        /* Note: the blob doesn't read this value, so i'm pretty sure this is safe for all cards. */
+        /* Any idea what this is? */
+        nv_wr32(dev, NV40_PFB_UNK_800, 0x1);
+
+        switch (dev_priv->chipset) {
+        case 0x40:
+        case 0x45:
+                tmp = nv_rd32(dev, NV10_PFB_CLOSE_PAGE2);
+                nv_wr32(dev, NV10_PFB_CLOSE_PAGE2, tmp & ~(1 << 15));
+                num_tiles = NV10_PFB_TILE__SIZE;
+                break;
+        case 0x46: /* G72 */
+        case 0x47: /* G70 */
+        case 0x49: /* G71 */
+        case 0x4b: /* G73 */
+        case 0x4c: /* C51 (G7X version) */
+                num_tiles = NV40_PFB_TILE__SIZE_1;
+                break;
+        default:
+                num_tiles = NV40_PFB_TILE__SIZE_0;
+                break;
+        }
+
+        fb_bar_size = drm_get_resource_len(dev, 0) - 1;
+        switch (dev_priv->chipset) {
+        case 0x40:
+                for (i = 0; i < num_tiles; i++) {
+                        nv_wr32(dev, NV10_PFB_TILE(i), 0);
+                        nv_wr32(dev, NV10_PFB_TLIMIT(i), fb_bar_size);
+                }
+                break;
+        default:
+                for (i = 0; i < num_tiles; i++) {
+                        nv_wr32(dev, NV40_PFB_TILE(i), 0);
+                        nv_wr32(dev, NV40_PFB_TLIMIT(i), fb_bar_size);
+                }
+                break;
+        }
+
+        return 0;
+}
+
+void
+nv40_fb_takedown(struct drm_device *dev)
+{
+}