Dave Airlie | f26c473 | 2006-01-02 17:18:39 +1100 | [diff] [blame] | 1 | /* r128_irq.c -- IRQ handling for radeon -*- linux-c -*- */ |
| 2 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 4 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * The Weather Channel (TM) funded Tungsten Graphics to develop the |
| 6 | * initial release of the Radeon 8500 driver under the XFree86 license. |
| 7 | * This notice must be preserved. |
| 8 | * |
| 9 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 10 | * copy of this software and associated documentation files (the "Software"), |
| 11 | * to deal in the Software without restriction, including without limitation |
| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 13 | * and/or sell copies of the Software, and to permit persons to whom the |
| 14 | * Software is furnished to do so, subject to the following conditions: |
| 15 | * |
| 16 | * The above copyright notice and this permission notice (including the next |
| 17 | * paragraph) shall be included in all copies or substantial portions of the |
| 18 | * Software. |
| 19 | * |
| 20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 23 | * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 24 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 25 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 26 | * DEALINGS IN THE SOFTWARE. |
| 27 | * |
| 28 | * Authors: |
| 29 | * Keith Whitwell <keith@tungstengraphics.com> |
| 30 | * Eric Anholt <anholt@FreeBSD.org> |
| 31 | */ |
| 32 | |
| 33 | #include "drmP.h" |
| 34 | #include "drm.h" |
| 35 | #include "r128_drm.h" |
| 36 | #include "r128_drv.h" |
| 37 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 38 | irqreturn_t r128_driver_irq_handler(DRM_IRQ_ARGS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | { |
| 40 | drm_device_t *dev = (drm_device_t *) arg; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 41 | drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | int status; |
| 43 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 44 | status = R128_READ(R128_GEN_INT_STATUS); |
| 45 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | /* VBLANK interrupt */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 47 | if (status & R128_CRTC_VBLANK_INT) { |
| 48 | R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | atomic_inc(&dev->vbl_received); |
| 50 | DRM_WAKEUP(&dev->vbl_queue); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 51 | drm_vbl_send_signals(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | return IRQ_HANDLED; |
| 53 | } |
| 54 | return IRQ_NONE; |
| 55 | } |
| 56 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 57 | int r128_driver_vblank_wait(drm_device_t * dev, unsigned int *sequence) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | { |
| 59 | unsigned int cur_vblank; |
| 60 | int ret = 0; |
| 61 | |
| 62 | /* Assume that the user has missed the current sequence number |
| 63 | * by about a day rather than she wants to wait for years |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 64 | * using vertical blanks... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 66 | DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ, |
| 67 | (((cur_vblank = atomic_read(&dev->vbl_received)) |
| 68 | - *sequence) <= (1 << 23))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
| 70 | *sequence = cur_vblank; |
| 71 | |
| 72 | return ret; |
| 73 | } |
| 74 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 75 | void r128_driver_irq_preinstall(drm_device_t * dev) |
| 76 | { |
| 77 | drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
| 79 | /* Disable *all* interrupts */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 80 | R128_WRITE(R128_GEN_INT_CNTL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | /* Clear vblank bit if it's already high */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 82 | R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | } |
| 84 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 85 | void r128_driver_irq_postinstall(drm_device_t * dev) |
| 86 | { |
| 87 | drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
| 89 | /* Turn on VBL interrupt */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 90 | R128_WRITE(R128_GEN_INT_CNTL, R128_CRTC_VBLANK_INT_EN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | } |
| 92 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 93 | void r128_driver_irq_uninstall(drm_device_t * dev) |
| 94 | { |
| 95 | drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | if (!dev_priv) |
| 97 | return; |
| 98 | |
| 99 | /* Disable *all* interrupts */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 100 | R128_WRITE(R128_GEN_INT_CNTL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | } |