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>
32 * $DragonFly: src/sys/dev/drm/r128_irq.c,v 1.1 2008/04/05 18:12:29 hasso Exp $
40 irqreturn_t r128_driver_irq_handler(DRM_IRQ_ARGS)
42 struct drm_device *dev = (struct drm_device *) arg;
43 drm_r128_private_t *dev_priv = (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);
53 drm_vbl_send_signals(dev);
59 int r128_driver_vblank_wait(struct drm_device * dev, unsigned int *sequence)
61 unsigned int cur_vblank;
64 /* Assume that the user has missed the current sequence number
65 * by about a day rather than she wants to wait for years
66 * using vertical blanks...
68 DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ,
69 (((cur_vblank = atomic_read(&dev->vbl_received))
70 - *sequence) <= (1 << 23)));
72 *sequence = cur_vblank;
77 void r128_driver_irq_preinstall(struct drm_device * dev)
79 drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private;
81 /* Disable *all* interrupts */
82 R128_WRITE(R128_GEN_INT_CNTL, 0);
83 /* Clear vblank bit if it's already high */
84 R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK);
87 void r128_driver_irq_postinstall(struct drm_device * dev)
89 drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private;
91 /* Turn on VBL interrupt */
92 R128_WRITE(R128_GEN_INT_CNTL, R128_CRTC_VBLANK_INT_EN);
95 void r128_driver_irq_uninstall(struct drm_device * dev)
97 drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private;
101 /* Disable *all* interrupts */
102 R128_WRITE(R128_GEN_INT_CNTL, 0);