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-rw-r--r--shared/mach64_irq.c130
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diff --git a/shared/mach64_irq.c b/shared/mach64_irq.c
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+/* mach64_irq.c -- IRQ handling for ATI Mach64 -*- linux-c -*-
+ * Created: Tue Feb 25, 2003 by Leif Delgass, based on radeon_irq.c/r128_irq.c
+ *
+ * Copyright (C) The Weather Channel, Inc. 2002.
+ * Copyright 2003 Leif Delgass
+ * 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
+ * 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.
+ *
+ * Authors:
+ * Keith Whitwell <keith@tungstengraphics.com>
+ * Eric Anholt <anholt@FreeBSD.org>
+ * Leif Delgass <ldelgass@retinalburn.net>
+ */
+
+#include "mach64.h"
+#include "drmP.h"
+#include "drm.h"
+#include "mach64_drm.h"
+#include "mach64_drv.h"
+
+irqreturn_t DRM(irq_handler)( DRM_IRQ_ARGS )
+{
+ drm_device_t *dev = (drm_device_t *) arg;
+ drm_mach64_private_t *dev_priv =
+ (drm_mach64_private_t *)dev->dev_private;
+ int status;
+
+ status = MACH64_READ( MACH64_CRTC_INT_CNTL );
+
+ /* VBLANK interrupt */
+ if (status & MACH64_CRTC_VBLANK_INT) {
+ /* Mask off all interrupt ack bits before setting the ack bit, since
+ * there may be other handlers outside the DRM.
+ *
+ * NOTE: On mach64, you need to keep the enable bits set when doing
+ * the ack, despite what the docs say about not acking and enabling
+ * in a single write.
+ */
+ MACH64_WRITE( MACH64_CRTC_INT_CNTL, (status & ~MACH64_CRTC_INT_ACKS)
+ | MACH64_CRTC_VBLANK_INT );
+
+ atomic_inc(&dev->vbl_received);
+ DRM_WAKEUP(&dev->vbl_queue);
+ DRM(vbl_send_signals)( dev );
+ return IRQ_HANDLED;
+ }
+ return IRQ_NONE;
+}
+
+int DRM(vblank_wait)(drm_device_t *dev, unsigned int *sequence)
+{
+ unsigned int cur_vblank;
+ 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 vertical blanks...
+ */
+ DRM_WAIT_ON( ret, dev->vbl_queue, 3*DRM_HZ,
+ ( ( ( cur_vblank = atomic_read(&dev->vbl_received ) )
+ - *sequence ) <= (1<<23) ) );
+
+ *sequence = cur_vblank;
+
+ return ret;
+}
+
+/* drm_dma.h hooks
+*/
+void DRM(driver_irq_preinstall)( drm_device_t *dev ) {
+ drm_mach64_private_t *dev_priv =
+ (drm_mach64_private_t *)dev->dev_private;
+
+ u32 status = MACH64_READ( MACH64_CRTC_INT_CNTL );
+
+ DRM_DEBUG("before install CRTC_INT_CTNL: 0x%08x\n", status );
+
+ /* Disable and clear VBLANK interrupt */
+ MACH64_WRITE( MACH64_CRTC_INT_CNTL, (status & ~MACH64_CRTC_VBLANK_INT_EN)
+ | MACH64_CRTC_VBLANK_INT );
+}
+
+void DRM(driver_irq_postinstall)( drm_device_t *dev ) {
+ drm_mach64_private_t *dev_priv =
+ (drm_mach64_private_t *)dev->dev_private;
+
+ /* Turn on VBLANK interrupt */
+ MACH64_WRITE( MACH64_CRTC_INT_CNTL, MACH64_READ( MACH64_CRTC_INT_CNTL )
+ | MACH64_CRTC_VBLANK_INT_EN );
+
+ DRM_DEBUG("after install CRTC_INT_CTNL: 0x%08x\n", MACH64_READ( MACH64_CRTC_INT_CNTL ));
+
+}
+
+void DRM(driver_irq_uninstall)( drm_device_t *dev ) {
+ drm_mach64_private_t *dev_priv =
+ (drm_mach64_private_t *)dev->dev_private;
+ if ( !dev_priv )
+ return;
+
+ /* Disable and clear VBLANK interrupt */
+ MACH64_WRITE( MACH64_CRTC_INT_CNTL,
+ (MACH64_READ( MACH64_CRTC_INT_CNTL ) & ~MACH64_CRTC_VBLANK_INT_EN)
+ | MACH64_CRTC_VBLANK_INT );
+
+ DRM_DEBUG("after uninstall CRTC_INT_CTNL: 0x%08x\n",
+ MACH64_READ( MACH64_CRTC_INT_CNTL ));
+}