340 строки
9.7 KiB
C
340 строки
9.7 KiB
C
/* via_irq.c
|
|
*
|
|
* Copyright 2004 BEAM Ltd.
|
|
* Copyright 2002 Tungsten Graphics, Inc.
|
|
* Copyright 2005 Thomas Hellstrom.
|
|
* All Rights Reserved.
|
|
*
|
|
* 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
|
|
* BEAM LTD, TUNGSTEN GRAPHICS 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:
|
|
* Terry Barnaby <terry1@beam.ltd.uk>
|
|
* Keith Whitwell <keith@tungstengraphics.com>
|
|
* Thomas Hellstrom <unichrome@shipmail.org>
|
|
*
|
|
* This code provides standard DRM access to the Via Unichrome / Pro Vertical blank
|
|
* interrupt, as well as an infrastructure to handle other interrupts of the chip.
|
|
* The refresh rate is also calculated for video playback sync purposes.
|
|
*/
|
|
|
|
#include "drmP.h"
|
|
#include "drm.h"
|
|
#include "via_drm.h"
|
|
#include "via_drv.h"
|
|
|
|
#define VIA_REG_INTERRUPT 0x200
|
|
|
|
/* VIA_REG_INTERRUPT */
|
|
#define VIA_IRQ_GLOBAL (1 << 31)
|
|
#define VIA_IRQ_VBLANK_ENABLE (1 << 19)
|
|
#define VIA_IRQ_VBLANK_PENDING (1 << 3)
|
|
#define VIA_IRQ_HQV0_ENABLE (1 << 11)
|
|
#define VIA_IRQ_HQV1_ENABLE (1 << 25)
|
|
#define VIA_IRQ_HQV0_PENDING (1 << 9)
|
|
#define VIA_IRQ_HQV1_PENDING (1 << 10)
|
|
|
|
/*
|
|
* Device-specific IRQs go here. This type might need to be extended with
|
|
* the register if there are multiple IRQ control registers.
|
|
* Currently we activate the HQV interrupts of Unichrome Pro group A.
|
|
*/
|
|
|
|
static maskarray_t via_pro_group_a_irqs[] = {
|
|
{VIA_IRQ_HQV0_ENABLE, VIA_IRQ_HQV0_PENDING, 0x000003D0, 0x00008010, 0x00000000 },
|
|
{VIA_IRQ_HQV1_ENABLE, VIA_IRQ_HQV1_PENDING, 0x000013D0, 0x00008010, 0x00000000 }};
|
|
static int via_num_pro_group_a = sizeof(via_pro_group_a_irqs)/sizeof(maskarray_t);
|
|
|
|
static maskarray_t via_unichrome_irqs[] = {};
|
|
static int via_num_unichrome = sizeof(via_unichrome_irqs)/sizeof(maskarray_t);
|
|
|
|
|
|
static unsigned time_diff(struct timeval *now,struct timeval *then)
|
|
{
|
|
return (now->tv_usec >= then->tv_usec) ?
|
|
now->tv_usec - then->tv_usec :
|
|
1000000 - (then->tv_usec - now->tv_usec);
|
|
}
|
|
|
|
irqreturn_t via_driver_irq_handler(DRM_IRQ_ARGS)
|
|
{
|
|
drm_device_t *dev = (drm_device_t *) arg;
|
|
drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
|
|
u32 status;
|
|
int handled = 0;
|
|
struct timeval cur_vblank;
|
|
drm_via_irq_t *cur_irq = dev_priv->via_irqs;
|
|
int i;
|
|
|
|
status = VIA_READ(VIA_REG_INTERRUPT);
|
|
if (status & VIA_IRQ_VBLANK_PENDING) {
|
|
atomic_inc(&dev->vbl_received);
|
|
if (!(atomic_read(&dev->vbl_received) & 0x0F)) {
|
|
do_gettimeofday(&cur_vblank);
|
|
if (dev_priv->last_vblank_valid) {
|
|
dev_priv->usec_per_vblank =
|
|
time_diff( &cur_vblank,&dev_priv->last_vblank) >> 4;
|
|
}
|
|
dev_priv->last_vblank = cur_vblank;
|
|
dev_priv->last_vblank_valid = 1;
|
|
}
|
|
if (!(atomic_read(&dev->vbl_received) & 0xFF)) {
|
|
DRM_DEBUG("US per vblank is: %u\n",
|
|
dev_priv->usec_per_vblank);
|
|
}
|
|
DRM_WAKEUP(&dev->vbl_queue);
|
|
drm_vbl_send_signals(dev);
|
|
handled = 1;
|
|
}
|
|
|
|
|
|
for (i=0; i<dev_priv->num_irqs; ++i) {
|
|
if (status & cur_irq->pending_mask) {
|
|
atomic_inc( &cur_irq->irq_received );
|
|
DRM_WAKEUP( &cur_irq->irq_queue );
|
|
handled = 1;
|
|
}
|
|
cur_irq++;
|
|
}
|
|
|
|
/* Acknowlege interrupts */
|
|
VIA_WRITE(VIA_REG_INTERRUPT, status);
|
|
|
|
|
|
if (handled)
|
|
return IRQ_HANDLED;
|
|
else
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
static __inline__ void viadrv_acknowledge_irqs(drm_via_private_t * dev_priv)
|
|
{
|
|
u32 status;
|
|
|
|
if (dev_priv) {
|
|
/* Acknowlege interrupts */
|
|
status = VIA_READ(VIA_REG_INTERRUPT);
|
|
VIA_WRITE(VIA_REG_INTERRUPT, status |
|
|
dev_priv->irq_pending_mask);
|
|
}
|
|
}
|
|
|
|
int via_driver_vblank_wait(drm_device_t * dev, unsigned int *sequence)
|
|
{
|
|
drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
|
|
unsigned int cur_vblank;
|
|
int ret = 0;
|
|
|
|
DRM_DEBUG("viadrv_vblank_wait\n");
|
|
if (!dev_priv) {
|
|
DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
viadrv_acknowledge_irqs(dev_priv);
|
|
|
|
/* 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;
|
|
}
|
|
|
|
static int
|
|
via_driver_irq_wait(drm_device_t * dev, unsigned int irq, int force_sequence,
|
|
unsigned int *sequence)
|
|
{
|
|
drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
|
|
unsigned int cur_irq_sequence;
|
|
drm_via_irq_t *cur_irq = dev_priv->via_irqs;
|
|
int ret = 0;
|
|
maskarray_t *masks = dev_priv->irq_masks;
|
|
|
|
DRM_DEBUG("%s\n", __FUNCTION__);
|
|
|
|
if (!dev_priv) {
|
|
DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
|
|
return DRM_ERR(EINVAL);
|
|
}
|
|
|
|
if (irq >= dev_priv->num_irqs ) {
|
|
DRM_ERROR("%s Trying to wait on unknown irq %d\n", __FUNCTION__, irq);
|
|
return DRM_ERR(EINVAL);
|
|
}
|
|
|
|
cur_irq += irq;
|
|
|
|
if (masks[irq][2] && !force_sequence) {
|
|
DRM_WAIT_ON(ret, cur_irq->irq_queue, 3 * DRM_HZ,
|
|
((VIA_READ(masks[irq][2]) & masks[irq][3]) == masks[irq][4]));
|
|
cur_irq_sequence = atomic_read(&cur_irq->irq_received);
|
|
} else {
|
|
DRM_WAIT_ON(ret, cur_irq->irq_queue, 3 * DRM_HZ,
|
|
(((cur_irq_sequence = atomic_read(&cur_irq->irq_received)) -
|
|
*sequence) <= (1 << 23)));
|
|
}
|
|
*sequence = cur_irq_sequence;
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* drm_dma.h hooks
|
|
*/
|
|
|
|
void via_driver_irq_preinstall(drm_device_t * dev)
|
|
{
|
|
drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
|
|
u32 status;
|
|
drm_via_irq_t *cur_irq = dev_priv->via_irqs;
|
|
int i;
|
|
|
|
DRM_DEBUG("driver_irq_preinstall: dev_priv: %p\n", dev_priv);
|
|
if (dev_priv) {
|
|
|
|
dev_priv->irq_enable_mask = VIA_IRQ_VBLANK_ENABLE;
|
|
dev_priv->irq_pending_mask = VIA_IRQ_VBLANK_PENDING;
|
|
|
|
dev_priv->irq_masks = (dev_priv->pro_group_a) ?
|
|
via_pro_group_a_irqs : via_unichrome_irqs;
|
|
dev_priv->num_irqs = (dev_priv->pro_group_a) ?
|
|
via_num_pro_group_a : via_num_unichrome;
|
|
|
|
for(i=0; i < dev_priv->num_irqs; ++i) {
|
|
atomic_set(&cur_irq->irq_received, 0);
|
|
cur_irq->enable_mask = dev_priv->irq_masks[i][0];
|
|
cur_irq->pending_mask = dev_priv->irq_masks[i][1];
|
|
DRM_INIT_WAITQUEUE( &cur_irq->irq_queue );
|
|
dev_priv->irq_enable_mask |= cur_irq->enable_mask;
|
|
dev_priv->irq_pending_mask |= cur_irq->pending_mask;
|
|
cur_irq++;
|
|
|
|
DRM_DEBUG("Initializing IRQ %d\n", i);
|
|
}
|
|
|
|
dev_priv->last_vblank_valid = 0;
|
|
|
|
// Clear VSync interrupt regs
|
|
status = VIA_READ(VIA_REG_INTERRUPT);
|
|
VIA_WRITE(VIA_REG_INTERRUPT, status &
|
|
~(dev_priv->irq_enable_mask));
|
|
|
|
/* Clear bits if they're already high */
|
|
viadrv_acknowledge_irqs(dev_priv);
|
|
}
|
|
}
|
|
|
|
void via_driver_irq_postinstall(drm_device_t * dev)
|
|
{
|
|
drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
|
|
u32 status;
|
|
|
|
DRM_DEBUG("via_driver_irq_postinstall\n");
|
|
if (dev_priv) {
|
|
status = VIA_READ(VIA_REG_INTERRUPT);
|
|
VIA_WRITE(VIA_REG_INTERRUPT, status | VIA_IRQ_GLOBAL
|
|
| dev_priv->irq_enable_mask);
|
|
|
|
/* Some magic, oh for some data sheets ! */
|
|
|
|
VIA_WRITE8(0x83d4, 0x11);
|
|
VIA_WRITE8(0x83d5, VIA_READ8(0x83d5) | 0x30);
|
|
|
|
}
|
|
}
|
|
|
|
void via_driver_irq_uninstall(drm_device_t * dev)
|
|
{
|
|
drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
|
|
u32 status;
|
|
|
|
DRM_DEBUG("driver_irq_uninstall)\n");
|
|
if (dev_priv) {
|
|
|
|
/* Some more magic, oh for some data sheets ! */
|
|
|
|
VIA_WRITE8(0x83d4, 0x11);
|
|
VIA_WRITE8(0x83d5, VIA_READ8(0x83d5) & ~0x30);
|
|
|
|
status = VIA_READ(VIA_REG_INTERRUPT);
|
|
VIA_WRITE(VIA_REG_INTERRUPT, status &
|
|
~(VIA_IRQ_VBLANK_ENABLE | dev_priv->irq_enable_mask));
|
|
}
|
|
}
|
|
|
|
int via_wait_irq(DRM_IOCTL_ARGS)
|
|
{
|
|
drm_file_t *priv = filp->private_data;
|
|
drm_device_t *dev = priv->head->dev;
|
|
drm_via_irqwait_t __user *argp = (void __user *)data;
|
|
drm_via_irqwait_t irqwait;
|
|
struct timeval now;
|
|
int ret = 0;
|
|
drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
|
|
drm_via_irq_t *cur_irq = dev_priv->via_irqs;
|
|
int force_sequence;
|
|
|
|
if (!dev->irq)
|
|
return DRM_ERR(EINVAL);
|
|
|
|
DRM_COPY_FROM_USER_IOCTL(irqwait, argp, sizeof(irqwait));
|
|
if (irqwait.request.irq >= dev_priv->num_irqs) {
|
|
DRM_ERROR("%s Trying to wait on unknown irq %d\n", __FUNCTION__,
|
|
irqwait.request.irq);
|
|
return DRM_ERR(EINVAL);
|
|
}
|
|
|
|
cur_irq += irqwait.request.irq;
|
|
|
|
switch (irqwait.request.type & ~VIA_IRQ_FLAGS_MASK) {
|
|
case VIA_IRQ_RELATIVE:
|
|
irqwait.request.sequence += atomic_read(&cur_irq->irq_received);
|
|
irqwait.request.type &= ~_DRM_VBLANK_RELATIVE;
|
|
case VIA_IRQ_ABSOLUTE:
|
|
break;
|
|
default:
|
|
return DRM_ERR(EINVAL);
|
|
}
|
|
|
|
if (irqwait.request.type & VIA_IRQ_SIGNAL) {
|
|
DRM_ERROR("%s Signals on Via IRQs not implemented yet.\n",
|
|
__FUNCTION__);
|
|
return DRM_ERR(EINVAL);
|
|
}
|
|
|
|
force_sequence = (irqwait.request.type & VIA_IRQ_FORCE_SEQUENCE);
|
|
|
|
ret = via_driver_irq_wait(dev, irqwait.request.irq, force_sequence,
|
|
&irqwait.request.sequence);
|
|
do_gettimeofday(&now);
|
|
irqwait.reply.tval_sec = now.tv_sec;
|
|
irqwait.reply.tval_usec = now.tv_usec;
|
|
|
|
DRM_COPY_TO_USER_IOCTL(argp, irqwait, sizeof(irqwait));
|
|
|
|
return ret;
|
|
}
|