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>
38 u32 r128_get_vblank_counter(struct drm_device *dev, int crtc)
40 const drm_r128_private_t *dev_priv = dev->dev_private;
45 return atomic_read(&dev_priv->vbl_received);
48 irqreturn_t r128_driver_irq_handler(DRM_IRQ_ARGS)
50 struct drm_device *dev = (struct drm_device *) arg;
51 drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private;
54 status = R128_READ(R128_GEN_INT_STATUS);
56 /* VBLANK interrupt */
57 if (status & R128_CRTC_VBLANK_INT) {
58 R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK);
59 atomic_inc(&dev_priv->vbl_received);
60 drm_handle_vblank(dev, 0);
66 int r128_enable_vblank(struct drm_device *dev, int crtc)
68 drm_r128_private_t *dev_priv = dev->dev_private;
71 DRM_ERROR("%s: bad crtc %d\n", __func__, crtc);
75 R128_WRITE(R128_GEN_INT_CNTL, R128_CRTC_VBLANK_INT_EN);
79 void r128_disable_vblank(struct drm_device *dev, int crtc)
82 DRM_ERROR("%s: bad crtc %d\n", __func__, crtc);
85 * FIXME: implement proper interrupt disable by using the vblank
86 * counter register (if available)
88 * R128_WRITE(R128_GEN_INT_CNTL,
89 * R128_READ(R128_GEN_INT_CNTL) & ~R128_CRTC_VBLANK_INT_EN);
93 void r128_driver_irq_preinstall(struct drm_device * dev)
95 drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private;
97 /* Disable *all* interrupts */
98 R128_WRITE(R128_GEN_INT_CNTL, 0);
99 /* Clear vblank bit if it's already high */
100 R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK);
103 int r128_driver_irq_postinstall(struct drm_device *dev)
108 void r128_driver_irq_uninstall(struct drm_device * dev)
110 drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private;
114 /* Disable *all* interrupts */
115 R128_WRITE(R128_GEN_INT_CNTL, 0);