From f4092abdf94af6a99aff944d6264bc1284e8bdd4 Mon Sep 17 00:00:00 2001 From: Reinhard Tartler Date: Mon, 10 Oct 2011 17:43:39 +0200 Subject: Imported nx-X11-3.1.0-1.tar.gz Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository --- nx-X11/extras/drm/shared/mga_irq.c | 103 +++++++++++++++++++++++++++++++++++++ 1 file changed, 103 insertions(+) create mode 100644 nx-X11/extras/drm/shared/mga_irq.c (limited to 'nx-X11/extras/drm/shared/mga_irq.c') diff --git a/nx-X11/extras/drm/shared/mga_irq.c b/nx-X11/extras/drm/shared/mga_irq.c new file mode 100644 index 000000000..c3185b0b8 --- /dev/null +++ b/nx-X11/extras/drm/shared/mga_irq.c @@ -0,0 +1,103 @@ +/* mga_irq.c -- IRQ handling for radeon -*- linux-c -*- + * + * Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved. + * + * The Weather Channel (TM) funded Tungsten Graphics to develop the + * initial release of the Radeon 8500 driver under the XFree86 license. + * This notice must be preserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Authors: + * Keith Whitwell + * Eric Anholt + */ + +#include "mga.h" +#include "drmP.h" +#include "drm.h" +#include "mga_drm.h" +#include "mga_drv.h" + +irqreturn_t mga_driver_irq_handler( DRM_IRQ_ARGS ) +{ + drm_device_t *dev = (drm_device_t *) arg; + drm_mga_private_t *dev_priv = + (drm_mga_private_t *)dev->dev_private; + int status; + + status = MGA_READ( MGA_STATUS ); + + /* VBLANK interrupt */ + if ( status & MGA_VLINEPEN ) { + MGA_WRITE( MGA_ICLEAR, MGA_VLINEICLR ); + atomic_inc(&dev->vbl_received); + DRM_WAKEUP(&dev->vbl_queue); + DRM(vbl_send_signals)( dev ); + return IRQ_HANDLED; + } + return IRQ_NONE; +} + +int mga_driver_vblank_wait(drm_device_t *dev, unsigned int *sequence) +{ + unsigned int cur_vblank; + int ret = 0; + + /* Assume that the user has missed the current sequence number + * by about a day rather than she wants to wait for years + * using vertical blanks... + */ + DRM_WAIT_ON( ret, dev->vbl_queue, 3*DRM_HZ, + ( ( ( cur_vblank = atomic_read(&dev->vbl_received ) ) + - *sequence ) <= (1<<23) ) ); + + *sequence = cur_vblank; + + return ret; +} + +void mga_driver_irq_preinstall( drm_device_t *dev ) { + drm_mga_private_t *dev_priv = + (drm_mga_private_t *)dev->dev_private; + + /* Disable *all* interrupts */ + MGA_WRITE( MGA_IEN, 0 ); + /* Clear bits if they're already high */ + MGA_WRITE( MGA_ICLEAR, ~0 ); +} + +void mga_driver_irq_postinstall( drm_device_t *dev ) { + drm_mga_private_t *dev_priv = + (drm_mga_private_t *)dev->dev_private; + + /* Turn on VBL interrupt */ + MGA_WRITE( MGA_IEN, MGA_VLINEIEN ); +} + +void mga_driver_irq_uninstall( drm_device_t *dev ) { + drm_mga_private_t *dev_priv = + (drm_mga_private_t *)dev->dev_private; + if (!dev_priv) + return; + + /* Disable *all* interrupts */ + MGA_WRITE( MGA_IEN, 0 ); +} -- cgit v1.2.3