aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/char/drm/via_irq.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/char/drm/via_irq.c')
-rw-r--r--drivers/char/drm/via_irq.c106
1 files changed, 55 insertions, 51 deletions
diff --git a/drivers/char/drm/via_irq.c b/drivers/char/drm/via_irq.c
index e8027f3a93b0..d023add1929b 100644
--- a/drivers/char/drm/via_irq.c
+++ b/drivers/char/drm/via_irq.c
@@ -54,23 +54,26 @@
/*
* 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.
+ * 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)
+ {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);
+ 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)
@@ -86,38 +89,37 @@ irqreturn_t via_driver_irq_handler(DRM_IRQ_ARGS)
status = VIA_READ(VIA_REG_INTERRUPT);
if (status & VIA_IRQ_VBLANK_PENDING) {
atomic_inc(&dev->vbl_received);
- if (!(atomic_read(&dev->vbl_received) & 0x0F)) {
+ 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;
+ 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)) {
+ }
+ if (!(atomic_read(&dev->vbl_received) & 0xFF)) {
DRM_DEBUG("US per vblank is: %u\n",
- dev_priv->usec_per_vblank);
+ 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) {
+ 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 );
+ 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
@@ -131,7 +133,7 @@ static __inline__ void viadrv_acknowledge_irqs(drm_via_private_t * dev_priv)
if (dev_priv) {
/* Acknowlege interrupts */
status = VIA_READ(VIA_REG_INTERRUPT);
- VIA_WRITE(VIA_REG_INTERRUPT, status |
+ VIA_WRITE(VIA_REG_INTERRUPT, status |
dev_priv->irq_pending_mask);
}
}
@@ -158,12 +160,12 @@ int via_driver_vblank_wait(drm_device_t * dev, unsigned int *sequence)
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
+static int
via_driver_irq_wait(drm_device_t * dev, unsigned int irq, int force_sequence,
unsigned int *sequence)
{
@@ -180,27 +182,29 @@ via_driver_irq_wait(drm_device_t * dev, unsigned int irq, int force_sequence,
return DRM_ERR(EINVAL);
}
- if (irq >= dev_priv->num_irqs ) {
- DRM_ERROR("%s Trying to wait on unknown irq %d\n", __FUNCTION__, irq);
+ 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]));
+ ((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)));
+ (((cur_irq_sequence =
+ atomic_read(&cur_irq->irq_received)) -
+ *sequence) <= (1 << 23)));
}
*sequence = cur_irq_sequence;
return ret;
}
-
/*
* drm_dma.h hooks
*/
@@ -219,29 +223,29 @@ void via_driver_irq_preinstall(drm_device_t * dev)
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;
+ 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) {
+ 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->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 );
+ 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;
+
+ dev_priv->last_vblank_valid = 0;
// Clear VSync interrupt regs
status = VIA_READ(VIA_REG_INTERRUPT);
- VIA_WRITE(VIA_REG_INTERRUPT, status &
+ VIA_WRITE(VIA_REG_INTERRUPT, status &
~(dev_priv->irq_enable_mask));
-
+
/* Clear bits if they're already high */
viadrv_acknowledge_irqs(dev_priv);
}
@@ -262,7 +266,7 @@ void via_driver_irq_postinstall(drm_device_t * dev)
VIA_WRITE8(0x83d4, 0x11);
VIA_WRITE8(0x83d5, VIA_READ8(0x83d5) | 0x30);
-
+
}
}
@@ -280,7 +284,7 @@ void via_driver_irq_uninstall(drm_device_t * dev)
VIA_WRITE8(0x83d5, VIA_READ8(0x83d5) & ~0x30);
status = VIA_READ(VIA_REG_INTERRUPT);
- VIA_WRITE(VIA_REG_INTERRUPT, status &
+ VIA_WRITE(VIA_REG_INTERRUPT, status &
~(VIA_IRQ_VBLANK_ENABLE | dev_priv->irq_enable_mask));
}
}
@@ -302,7 +306,7 @@ int via_wait_irq(DRM_IOCTL_ARGS)
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__,
+ DRM_ERROR("%s Trying to wait on unknown irq %d\n", __FUNCTION__,
irqwait.request.irq);
return DRM_ERR(EINVAL);
}
@@ -320,7 +324,7 @@ int via_wait_irq(DRM_IOCTL_ARGS)
}
if (irqwait.request.type & VIA_IRQ_SIGNAL) {
- DRM_ERROR("%s Signals on Via IRQs not implemented yet.\n",
+ DRM_ERROR("%s Signals on Via IRQs not implemented yet.\n",
__FUNCTION__);
return DRM_ERR(EINVAL);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.