1 /* r128_irq.c -- IRQ handling for radeon -*- linux-c -*-
3 * Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved.
5 * The Weather Channel (TM) funded Tungsten Graphics to develop the
6 * initial release of the Radeon 8500 driver under the XFree86 license.
7 * This notice must be preserved.
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice (including the next
17 * paragraph) shall be included in all copies or substantial portions of the
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
24 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
25 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 * DEALINGS IN THE SOFTWARE.
29 * Keith Whitwell <keith@tungstengraphics.com>
30 * Eric Anholt <anholt@FreeBSD.org>
39 void r128_dma_service( DRM_IRQ_ARGS )
41 drm_device_t *dev = (drm_device_t *) arg;
42 drm_r128_private_t *dev_priv =
43 (drm_r128_private_t *)dev->dev_private;
46 status = R128_READ( R128_GEN_INT_STATUS );
48 /* VBLANK interrupt */
49 if ( status & R128_CRTC_VBLANK_INT ) {
50 R128_WRITE( R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK );
51 atomic_inc(&dev->vbl_received);
52 DRM_WAKEUP(&dev->vbl_queue);
56 int DRM(vblank_wait)(drm_device_t *dev, unsigned int *sequence)
58 unsigned int cur_vblank;
61 /* Assume that the user has missed the current sequence number
62 * by about a day rather than she wants to wait for years
63 * using vertical blanks...
65 DRM_WAIT_ON( ret, dev->vbl_queue, 3*DRM_HZ,
66 ( ( ( cur_vblank = atomic_read(&dev->vbl_received ) )
67 + ~*sequence + 1 ) <= (1<<23) ) );
69 *sequence = cur_vblank;
74 void r128_driver_irq_preinstall( drm_device_t *dev ) {
75 drm_r128_private_t *dev_priv =
76 (drm_r128_private_t *)dev->dev_private;
78 /* Disable *all* interrupts */
79 R128_WRITE( R128_GEN_INT_CNTL, 0 );
80 /* Clear vblank bit if it's already high */
81 R128_WRITE( R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK );
84 void r128_driver_irq_postinstall( drm_device_t *dev ) {
85 drm_r128_private_t *dev_priv =
86 (drm_r128_private_t *)dev->dev_private;
88 /* Turn on VBL interrupt */
89 R128_WRITE( R128_GEN_INT_CNTL, R128_CRTC_VBLANK_INT_EN );
92 void r128_driver_irq_uninstall( drm_device_t *dev ) {
93 drm_r128_private_t *dev_priv =
94 (drm_r128_private_t *)dev->dev_private;
96 /* Disable *all* interrupts */
97 R128_WRITE( R128_GEN_INT_CNTL, 0 );