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/* mach64_irq.c -- IRQ handling for ATI Mach64 -*- linux-c -*-
* Created: Tue Feb 25, 2003 by Leif Delgass, based on radeon_irq.c/r128_irq.c
*/
/*-
* Copyright (C) The Weather Channel, Inc. 2002.
* Copyright 2003 Leif Delgass
* 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
* THE COPYRIGHT OWNER(S) 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 <keith@tungstengraphics.com>
* Eric Anholt <anholt@FreeBSD.org>
* Leif Delgass <ldelgass@retinalburn.net>
*/
#include "drmP.h"
#include "drm.h"
#include "mach64_drm.h"
#include "mach64_drv.h"
int machdrm_intr(void *);
int
machdrm_intr(void *arg)
{
struct drm_device *dev = arg;
drm_mach64_private_t *dev_priv = dev->dev_private;
u_int32_t status;
int handled = 0;
status = MACH64_READ(MACH64_CRTC_INT_CNTL);
/* VBLANK interrupt */
if (status & MACH64_CRTC_VBLANK_INT) {
/*
* Mask off all interrupt ack bits before setting the ack bit,
* since there may be other handlers outside the DRM.
*
* NOTE: On mach64, you need to keep the enable bits set when
* doing the ack, despite what the docs say about not acking
* and enabling in a single write.
*/
MACH64_WRITE(MACH64_CRTC_INT_CNTL,
(status & ~MACH64_CRTC_INT_ACKS) | MACH64_CRTC_VBLANK_INT);
atomic_inc(&dev_priv->vbl_received);
drm_handle_vblank(dev, 0);
handled = 1;
}
return (handled);
}
u_int32_t
mach64_get_vblank_counter(struct drm_device * dev, int crtc)
{
const drm_mach64_private_t *const dev_priv = dev->dev_private;
if (crtc != 0)
return 0;
return (atomic_read(&dev_priv->vbl_received));
}
int
mach64_enable_vblank(struct drm_device * dev, int crtc)
{
drm_mach64_private_t *dev_priv = dev->dev_private;
if (crtc != 0) {
DRM_ERROR("tried to enable vblank on non-existent crtc %d\n",
crtc);
return (EINVAL);
}
DRM_DEBUG("before enable vblank CRTC_INT_CTNL: 0x%08x\n",
MACH64_READ(MACH64_CRTC_INT_CNTL));
/* Turn on VBLANK interrupt */
MACH64_WRITE(MACH64_CRTC_INT_CNTL, MACH64_READ(MACH64_CRTC_INT_CNTL) |
MACH64_CRTC_VBLANK_INT_EN);
return (0);
}
void
mach64_disable_vblank(struct drm_device * dev, int crtc)
{
if (crtc != 0) {
DRM_ERROR("tried to disable vblank on non-existent crtc %d\n",
crtc);
return;
}
/*
* FIXME: implement proper interrupt disable by using the vblank
* counter register (if available).
*/
}
static void
mach64_disable_vblank_local(struct drm_device * dev, int crtc)
{
drm_mach64_private_t *dev_priv = dev->dev_private;
u_int32_t status;
status = MACH64_READ(MACH64_CRTC_INT_CNTL);
if (crtc != 0) {
DRM_ERROR("tried to disable vblank on non-existent crtc %d\n",
crtc);
return;
}
DRM_DEBUG("before disable vblank CRTC_INT_CTNL: 0x%08x\n", status);
/* Disable and clear VBLANK interrupt */
MACH64_WRITE(MACH64_CRTC_INT_CNTL, (status & ~MACH64_CRTC_VBLANK_INT_EN)
| MACH64_CRTC_VBLANK_INT);
}
int
mach64_driver_irq_install(struct drm_device * dev)
{
drm_mach64_private_t *dev_priv = dev->dev_private;
DRM_DEBUG("before install CRTC_INT_CTNL: 0x%08x\n",
MACH64_READ(MACH64_CRTC_INT_CNTL));
mach64_disable_vblank_local(dev, 0);
dev_priv->irqh = pci_intr_establish(dev_priv->pc, dev_priv->ih, IPL_BIO,
machdrm_intr, dev, dev_priv->dev.dv_xname);
if (dev_priv->irqh == NULL)
return (ENOENT);
return (0);
}
void
mach64_driver_irq_uninstall(struct drm_device * dev)
{
drm_mach64_private_t *dev_priv = dev->dev_private;
mach64_disable_vblank_local(dev, 0);
DRM_DEBUG("after uninstall CRTC_INT_CTNL: 0x%08x\n",
MACH64_READ(MACH64_CRTC_INT_CNTL));
pci_intr_disestablish(dev_priv->pc, dev_priv->irqh);
}
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