diff options
Diffstat (limited to 'drivers/char/drm/mga_irq.c')
| -rw-r--r-- | drivers/char/drm/mga_irq.c | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/drivers/char/drm/mga_irq.c b/drivers/char/drm/mga_irq.c deleted file mode 100644 index 06852fb4b27..00000000000 --- a/drivers/char/drm/mga_irq.c +++ /dev/null @@ -1,181 +0,0 @@ -/* 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 <keith@tungstengraphics.com> - * Eric Anholt <anholt@FreeBSD.org> - */ - -#include "drmP.h" -#include "drm.h" -#include "mga_drm.h" -#include "mga_drv.h" - -u32 mga_get_vblank_counter(struct drm_device *dev, int crtc) -{ - const drm_mga_private_t *const dev_priv = - (drm_mga_private_t *) dev->dev_private; - - if (crtc != 0) { - return 0; - } - - - return atomic_read(&dev_priv->vbl_received); -} - - -irqreturn_t mga_driver_irq_handler(DRM_IRQ_ARGS) -{ - struct drm_device *dev = (struct drm_device *) arg; - drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; - int status; - int handled = 0; - - status = MGA_READ(MGA_STATUS); - - /* VBLANK interrupt */ - if (status & MGA_VLINEPEN) { - MGA_WRITE(MGA_ICLEAR, MGA_VLINEICLR); - atomic_inc(&dev_priv->vbl_received); - drm_handle_vblank(dev, 0); - handled = 1; - } - - /* SOFTRAP interrupt */ - if (status & MGA_SOFTRAPEN) { - const u32 prim_start = MGA_READ(MGA_PRIMADDRESS); - const u32 prim_end = MGA_READ(MGA_PRIMEND); - - MGA_WRITE(MGA_ICLEAR, MGA_SOFTRAPICLR); - - /* In addition to clearing the interrupt-pending bit, we - * have to write to MGA_PRIMEND to re-start the DMA operation. - */ - if ((prim_start & ~0x03) != (prim_end & ~0x03)) { - MGA_WRITE(MGA_PRIMEND, prim_end); - } - - atomic_inc(&dev_priv->last_fence_retired); - DRM_WAKEUP(&dev_priv->fence_queue); - handled = 1; - } - - if (handled) { - return IRQ_HANDLED; - } - return IRQ_NONE; -} - -int mga_enable_vblank(struct drm_device *dev, int crtc) -{ - drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; - - if (crtc != 0) { - DRM_ERROR("tried to enable vblank on non-existent crtc %d\n", - crtc); - return 0; - } - - MGA_WRITE(MGA_IEN, MGA_VLINEIEN | MGA_SOFTRAPEN); - return 0; -} - - -void mga_disable_vblank(struct drm_device *dev, int crtc) -{ - if (crtc != 0) { - DRM_ERROR("tried to disable vblank on non-existent crtc %d\n", - crtc); - } - - /* Do *NOT* disable the vertical refresh interrupt. MGA doesn't have - * a nice hardware counter that tracks the number of refreshes when - * the interrupt is disabled, and the kernel doesn't know the refresh - * rate to calculate an estimate. - */ - /* MGA_WRITE(MGA_IEN, MGA_VLINEIEN | MGA_SOFTRAPEN); */ -} - -int mga_driver_fence_wait(struct drm_device * dev, unsigned int *sequence) -{ - drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; - unsigned int cur_fence; - 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 fences. - */ - DRM_WAIT_ON(ret, dev_priv->fence_queue, 3 * DRM_HZ, - (((cur_fence = atomic_read(&dev_priv->last_fence_retired)) - - *sequence) <= (1 << 23))); - - *sequence = cur_fence; - - return ret; -} - -void mga_driver_irq_preinstall(struct drm_device * 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); -} - -int mga_driver_irq_postinstall(struct drm_device * dev) -{ - drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; - int ret; - - ret = drm_vblank_init(dev, 1); - if (ret) - return ret; - - DRM_INIT_WAITQUEUE(&dev_priv->fence_queue); - - /* Turn on soft trap interrupt. Vertical blank interrupts are enabled - * in mga_enable_vblank. - */ - MGA_WRITE(MGA_IEN, MGA_SOFTRAPEN); - return 0; -} - -void mga_driver_irq_uninstall(struct drm_device * 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); - - dev->irq_enabled = 0; -} |