1/* r128_irq.c -- IRQ handling for radeon -*- linux-c -*- */ 2/* 3 * Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved. 4 * 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. 8 * 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: 15 * 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 18 * Software. 19 * 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. 27 * 28 * Authors: 29 * Keith Whitwell <keith@tungstengraphics.com> 30 * Eric Anholt <anholt@FreeBSD.org> 31 */ 32 33#include "drmP.h" 34#include "drm.h" 35#include "r128_drm.h" 36#include "r128_drv.h" 37 38u32 r128_get_vblank_counter(struct drm_device *dev, int crtc) 39{ 40 const drm_r128_private_t *dev_priv = dev->dev_private; 41 42 if (crtc != 0) 43 return 0; 44 45 return atomic_read(&dev_priv->vbl_received); 46} 47 48irqreturn_t r128_driver_irq_handler(DRM_IRQ_ARGS) 49{ 50 struct drm_device *dev = (struct drm_device *) arg; 51 drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; 52 int status; 53 54 status = R128_READ(R128_GEN_INT_STATUS); 55 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); 61 return IRQ_HANDLED; 62 } 63 return IRQ_NONE; 64} 65 66int r128_enable_vblank(struct drm_device *dev, int crtc) 67{ 68 drm_r128_private_t *dev_priv = dev->dev_private; 69 70 if (crtc != 0) { 71 DRM_ERROR("%s: bad crtc %d\n", __func__, crtc); 72 return -EINVAL; 73 } 74 75 R128_WRITE(R128_GEN_INT_CNTL, R128_CRTC_VBLANK_INT_EN); 76 return 0; 77} 78 79void r128_disable_vblank(struct drm_device *dev, int crtc) 80{ 81 if (crtc != 0) 82 DRM_ERROR("%s: bad crtc %d\n", __func__, crtc); 83 84} 85 86void r128_driver_irq_preinstall(struct drm_device *dev) 87{ 88 drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; 89 90 /* Disable *all* interrupts */ 91 R128_WRITE(R128_GEN_INT_CNTL, 0); 92 /* Clear vblank bit if it's already high */ 93 R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK); 94} 95 96int r128_driver_irq_postinstall(struct drm_device *dev) 97{ 98 return 0; 99} 100 101void r128_driver_irq_uninstall(struct drm_device *dev) 102{ 103 drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; 104 if (!dev_priv) 105 return; 106 107 /* Disable *all* interrupts */ 108 R128_WRITE(R128_GEN_INT_CNTL, 0); 109} 110