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Diffstat (limited to 'drivers/char/drm/mga_irq.c')
-rw-r--r--drivers/char/drm/mga_irq.c181
1 files changed, 0 insertions, 181 deletions
diff --git a/drivers/char/drm/mga_irq.c b/drivers/char/drm/mga_irq.c
deleted file mode 100644
index 06852fb4b27..00000000000
--- a/drivers/char/drm/mga_irq.c
+++ /dev/null
@@ -1,181 +0,0 @@
-/* mga_irq.c -- IRQ handling for radeon -*- linux-c -*-
- *
- * Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved.
- *
- * The Weather Channel (TM) funded Tungsten Graphics to develop the
- * initial release of the Radeon 8500 driver under the XFree86 license.
- * This notice must be preserved.
- *
- * 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
- * PRECISION INSIGHT 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.
- *
- * Authors:
- * Keith Whitwell <keith@tungstengraphics.com>
- * Eric Anholt <anholt@FreeBSD.org>
- */
-
-#include "drmP.h"
-#include "drm.h"
-#include "mga_drm.h"
-#include "mga_drv.h"
-
-u32 mga_get_vblank_counter(struct drm_device *dev, int crtc)
-{
- const drm_mga_private_t *const dev_priv =
- (drm_mga_private_t *) dev->dev_private;
-
- if (crtc != 0) {
- return 0;
- }
-
-
- return atomic_read(&dev_priv->vbl_received);
-}
-
-
-irqreturn_t mga_driver_irq_handler(DRM_IRQ_ARGS)
-{
- struct drm_device *dev = (struct drm_device *) arg;
- drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private;
- int status;
- int handled = 0;
-
- status = MGA_READ(MGA_STATUS);
-
- /* VBLANK interrupt */
- if (status & MGA_VLINEPEN) {
- MGA_WRITE(MGA_ICLEAR, MGA_VLINEICLR);
- atomic_inc(&dev_priv->vbl_received);
- drm_handle_vblank(dev, 0);
- handled = 1;
- }
-
- /* SOFTRAP interrupt */
- if (status & MGA_SOFTRAPEN) {
- const u32 prim_start = MGA_READ(MGA_PRIMADDRESS);
- const u32 prim_end = MGA_READ(MGA_PRIMEND);
-
- MGA_WRITE(MGA_ICLEAR, MGA_SOFTRAPICLR);
-
- /* In addition to clearing the interrupt-pending bit, we
- * have to write to MGA_PRIMEND to re-start the DMA operation.
- */
- if ((prim_start & ~0x03) != (prim_end & ~0x03)) {
- MGA_WRITE(MGA_PRIMEND, prim_end);
- }
-
- atomic_inc(&dev_priv->last_fence_retired);
- DRM_WAKEUP(&dev_priv->fence_queue);
- handled = 1;
- }
-
- if (handled) {
- return IRQ_HANDLED;
- }
- return IRQ_NONE;
-}
-
-int mga_enable_vblank(struct drm_device *dev, int crtc)
-{
- drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private;
-
- if (crtc != 0) {
- DRM_ERROR("tried to enable vblank on non-existent crtc %d\n",
- crtc);
- return 0;
- }
-
- MGA_WRITE(MGA_IEN, MGA_VLINEIEN | MGA_SOFTRAPEN);
- return 0;
-}
-
-
-void mga_disable_vblank(struct drm_device *dev, int crtc)
-{
- if (crtc != 0) {
- DRM_ERROR("tried to disable vblank on non-existent crtc %d\n",
- crtc);
- }
-
- /* Do *NOT* disable the vertical refresh interrupt. MGA doesn't have
- * a nice hardware counter that tracks the number of refreshes when
- * the interrupt is disabled, and the kernel doesn't know the refresh
- * rate to calculate an estimate.
- */
- /* MGA_WRITE(MGA_IEN, MGA_VLINEIEN | MGA_SOFTRAPEN); */
-}
-
-int mga_driver_fence_wait(struct drm_device * dev, unsigned int *sequence)
-{
- drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private;
- unsigned int cur_fence;
- int ret = 0;
-
- /* Assume that the user has missed the current sequence number
- * by about a day rather than she wants to wait for years
- * using fences.
- */
- DRM_WAIT_ON(ret, dev_priv->fence_queue, 3 * DRM_HZ,
- (((cur_fence = atomic_read(&dev_priv->last_fence_retired))
- - *sequence) <= (1 << 23)));
-
- *sequence = cur_fence;
-
- return ret;
-}
-
-void mga_driver_irq_preinstall(struct drm_device * dev)
-{
- drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private;
-
- /* Disable *all* interrupts */
- MGA_WRITE(MGA_IEN, 0);
- /* Clear bits if they're already high */
- MGA_WRITE(MGA_ICLEAR, ~0);
-}
-
-int mga_driver_irq_postinstall(struct drm_device * dev)
-{
- drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private;
- int ret;
-
- ret = drm_vblank_init(dev, 1);
- if (ret)
- return ret;
-
- DRM_INIT_WAITQUEUE(&dev_priv->fence_queue);
-
- /* Turn on soft trap interrupt. Vertical blank interrupts are enabled
- * in mga_enable_vblank.
- */
- MGA_WRITE(MGA_IEN, MGA_SOFTRAPEN);
- return 0;
-}
-
-void mga_driver_irq_uninstall(struct drm_device * dev)
-{
- drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private;
- if (!dev_priv)
- return;
-
- /* Disable *all* interrupts */
- MGA_WRITE(MGA_IEN, 0);
-
- dev->irq_enabled = 0;
-}