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 38irqreturn_t r128_driver_irq_handler(DRM_IRQ_ARGS) 39{ 40 drm_device_t *dev = (drm_device_t *) arg; 41 drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; 42 int status; 43 44 status = R128_READ(R128_GEN_INT_STATUS); 45 46 /* VBLANK interrupt */ 47 if (status & R128_CRTC_VBLANK_INT) { 48 R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK); 49 atomic_inc(&dev->vbl_received); 50 DRM_WAKEUP(&dev->vbl_queue); 51 drm_vbl_send_signals(dev); 52 return IRQ_HANDLED; 53 } 54 return IRQ_NONE; 55} 56 57int r128_driver_vblank_wait(drm_device_t * dev, unsigned int *sequence) 58{ 59 unsigned int cur_vblank; 60 int ret = 0; 61 62 /* Assume that the user has missed the current sequence number 63 * by about a day rather than she wants to wait for years 64 * using vertical blanks... 65 */ 66 DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ, 67 (((cur_vblank = atomic_read(&dev->vbl_received)) 68 - *sequence) <= (1 << 23))); 69 70 *sequence = cur_vblank; 71 72 return ret; 73} 74 75void r128_driver_irq_preinstall(drm_device_t * dev) 76{ 77 drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; 78 79 /* Disable *all* interrupts */ 80 R128_WRITE(R128_GEN_INT_CNTL, 0); 81 /* Clear vblank bit if it's already high */ 82 R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK); 83} 84 85void r128_driver_irq_postinstall(drm_device_t * dev) 86{ 87 drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; 88 89 /* Turn on VBL interrupt */ 90 R128_WRITE(R128_GEN_INT_CNTL, R128_CRTC_VBLANK_INT_EN); 91} 92 93void r128_driver_irq_uninstall(drm_device_t * dev) 94{ 95 drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; 96 if (!dev_priv) 97 return; 98 99 /* Disable *all* interrupts */ 100 R128_WRITE(R128_GEN_INT_CNTL, 0); 101} 102