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>
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include "dev/drm/drmP.h"
37 #include "dev/drm/drm.h"
38 #include "dev/drm/r128_drm.h"
39 #include "dev/drm/r128_drv.h"
41 u32 r128_get_vblank_counter(struct drm_device *dev, int crtc)
43 const drm_r128_private_t *dev_priv = dev->dev_private;
48 return atomic_read(&dev_priv->vbl_received);
51 irqreturn_t r128_driver_irq_handler(DRM_IRQ_ARGS)
53 struct drm_device *dev = (struct drm_device *) arg;
54 drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private;
57 status = R128_READ(R128_GEN_INT_STATUS);
59 /* VBLANK interrupt */
60 if (status & R128_CRTC_VBLANK_INT) {
61 R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK);
62 atomic_inc(&dev_priv->vbl_received);
63 drm_handle_vblank(dev, 0);
69 int r128_enable_vblank(struct drm_device *dev, int crtc)
71 drm_r128_private_t *dev_priv = dev->dev_private;
74 DRM_ERROR("%s: bad crtc %d\n", __FUNCTION__, crtc);
78 R128_WRITE(R128_GEN_INT_CNTL, R128_CRTC_VBLANK_INT_EN);
82 void r128_disable_vblank(struct drm_device *dev, int crtc)
85 DRM_ERROR("%s: bad crtc %d\n", __FUNCTION__, crtc);
88 * FIXME: implement proper interrupt disable by using the vblank
89 * counter register (if available)
91 * R128_WRITE(R128_GEN_INT_CNTL,
92 * R128_READ(R128_GEN_INT_CNTL) & ~R128_CRTC_VBLANK_INT_EN);
96 void r128_driver_irq_preinstall(struct drm_device * dev)
98 drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private;
100 /* Disable *all* interrupts */
101 R128_WRITE(R128_GEN_INT_CNTL, 0);
102 /* Clear vblank bit if it's already high */
103 R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK);
106 int r128_driver_irq_postinstall(struct drm_device * dev)
111 void r128_driver_irq_uninstall(struct drm_device * dev)
113 drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private;
117 /* Disable *all* interrupts */
118 R128_WRITE(R128_GEN_INT_CNTL, 0);