drm: Add via unichrome support

Add DRM device driver for VIA Unichrome chipsets

From: Unichrome Project http://unichrome.sf.net, Erdi Chen, Thomas Hellstrom    Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 110 insertions, 0 deletions

diff --git a/drivers/char/drm/via_map.c b/drivers/char/drm/via_map.c
new file mode 100644
index 000000000000..0be829b6ec65
--- /dev/null
+++ b/drivers/char/drm/via_map.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2003 S3 Graphics, Inc. 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, sub license,
+ * 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * VIA, S3 GRAPHICS, 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 "via_drm.h"
+#include "via_drv.h"
+
+static int via_do_init_map(drm_device_t * dev, drm_via_init_t * init)
+{
+        drm_via_private_t *dev_priv;
+
+        DRM_DEBUG("%s\n", __FUNCTION__);
+
+        dev_priv = drm_alloc(sizeof(drm_via_private_t), DRM_MEM_DRIVER);
+        if (dev_priv == NULL)
+                return -ENOMEM;
+
+        memset(dev_priv, 0, sizeof(drm_via_private_t));
+
+        DRM_GETSAREA();
+        if (!dev_priv->sarea) {
+                DRM_ERROR("could not find sarea!\n");
+                dev->dev_private = (void *)dev_priv;
+                via_do_cleanup_map(dev);
+                return -EINVAL;
+        }
+
+        dev_priv->fb = drm_core_findmap(dev, init->fb_offset);
+        if (!dev_priv->fb) {
+                DRM_ERROR("could not find framebuffer!\n");
+                dev->dev_private = (void *)dev_priv;
+                via_do_cleanup_map(dev);
+                return -EINVAL;
+        }
+        dev_priv->mmio = drm_core_findmap(dev, init->mmio_offset);
+        if (!dev_priv->mmio) {
+                DRM_ERROR("could not find mmio region!\n");
+                dev->dev_private = (void *)dev_priv;
+                via_do_cleanup_map(dev);
+                return -EINVAL;
+        }
+
+        dev_priv->sarea_priv =
+            (drm_via_sarea_t *) ((u8 *) dev_priv->sarea->handle +
+                                 init->sarea_priv_offset);
+
+        dev_priv->agpAddr = init->agpAddr;
+
+        via_init_futex( dev_priv );
+        dev_priv->pro_group_a = (dev->pdev->device == 0x3118);
+
+        dev->dev_private = (void *)dev_priv;
+        return 0;
+}
+
+int via_do_cleanup_map(drm_device_t * dev)
+{
+        if (dev->dev_private) {
+
+                drm_via_private_t *dev_priv = dev->dev_private;
+
+                via_dma_cleanup(dev);
+
+                drm_free(dev_priv, sizeof(drm_via_private_t), DRM_MEM_DRIVER);
+                dev->dev_private = NULL;
+        }
+
+        return 0;
+}
+
+int via_map_init(DRM_IOCTL_ARGS)
+{
+        DRM_DEVICE;
+        drm_via_init_t init;
+
+        DRM_DEBUG("%s\n", __FUNCTION__);
+
+        DRM_COPY_FROM_USER_IOCTL(init, (drm_via_init_t *) data, sizeof(init));
+
+        switch (init.func) {
+        case VIA_INIT_MAP:
+                return via_do_init_map(dev, &init);
+        case VIA_CLEANUP_MAP:
+                return via_do_cleanup_map(dev);
+        }
+
+        return -EINVAL;
+}
+
+