1 files changed, 116 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nv30_fb.c b/drivers/gpu/drm/nouveau/nv30_fb.c
new file mode 100644
index 00000000000..e0135f0e214
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nv30_fb.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2010 Francisco Jerez.
+ * All Rights Reserved.
+ *
+ * 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 (including the
+ * next paragraph) 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 OWNER(S) AND/OR ITS SUPPLIERS 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 "drmP.h"
+#include "drm.h"
+#include "nouveau_drv.h"
+#include "nouveau_drm.h"
+
+void
+nv30_fb_init_tile_region(struct drm_device *dev, int i, uint32_t addr,
+                         uint32_t size, uint32_t pitch, uint32_t flags)
+{
+        struct drm_nouveau_private *dev_priv = dev->dev_private;
+        struct nouveau_tile_reg *tile = &dev_priv->tile.reg[i];
+
+        tile->addr = addr | 1;
+        tile->limit = max(1u, addr + size) - 1;
+        tile->pitch = pitch;
+}
+
+void
+nv30_fb_free_tile_region(struct drm_device *dev, int i)
+{
+        struct drm_nouveau_private *dev_priv = dev->dev_private;
+        struct nouveau_tile_reg *tile = &dev_priv->tile.reg[i];
+
+        tile->addr = tile->limit = tile->pitch = 0;
+}
+
+static int
+calc_bias(struct drm_device *dev, int k, int i, int j)
+{
+        struct drm_nouveau_private *dev_priv = dev->dev_private;
+        int b = (dev_priv->chipset > 0x30 ?
+                 nv_rd32(dev, 0x122c + 0x10 * k + 0x4 * j) >> (4 * (i ^ 1)) :
+                 0) & 0xf;
+
+        return 2 * (b & 0x8 ? b - 0x10 : b);
+}
+
+static int
+calc_ref(struct drm_device *dev, int l, int k, int i)
+{
+        int j, x = 0;
+
+        for (j = 0; j < 4; j++) {
+                int m = (l >> (8 * i) & 0xff) + calc_bias(dev, k, i, j);
+
+                x |= (0x80 | clamp(m, 0, 0x1f)) << (8 * j);
+        }
+
+        return x;
+}
+
+int
+nv30_fb_init(struct drm_device *dev)
+{
+        struct drm_nouveau_private *dev_priv = dev->dev_private;
+        struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
+        int i, j;
+
+        pfb->num_tiles = NV10_PFB_TILE__SIZE;
+
+        /* Turn all the tiling regions off. */
+        for (i = 0; i < pfb->num_tiles; i++)
+                pfb->set_tile_region(dev, i);
+
+        /* Init the memory timing regs at 0x10037c/0x1003ac */
+        if (dev_priv->chipset == 0x30 ||
+            dev_priv->chipset == 0x31 ||
+            dev_priv->chipset == 0x35) {
+                /* Related to ROP count */
+                int n = (dev_priv->chipset == 0x31 ? 2 : 4);
+                int l = nv_rd32(dev, 0x1003d0);
+
+                for (i = 0; i < n; i++) {
+                        for (j = 0; j < 3; j++)
+                                nv_wr32(dev, 0x10037c + 0xc * i + 0x4 * j,
+                                        calc_ref(dev, l, 0, j));
+
+                        for (j = 0; j < 2; j++)
+                                nv_wr32(dev, 0x1003ac + 0x8 * i + 0x4 * j,
+                                        calc_ref(dev, l, 1, j));
+                }
+        }
+
+        return 0;
+}
+
+void
+nv30_fb_takedown(struct drm_device *dev)
+{
+}