Commit | Line | Data |
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f26c473c DA |
1 | /* r128_irq.c -- IRQ handling for radeon -*- linux-c -*- */ |
2 | /* | |
1da177e4 | 3 | * Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved. |
b5e89ed5 | 4 | * |
1da177e4 LT |
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 | ||
0a3e67a4 JB |
38 | u32 r128_get_vblank_counter(struct drm_device *dev, int crtc) |
39 | { | |
40 | const drm_r128_private_t *dev_priv = dev->dev_private; | |
41 | ||
42 | if (crtc != 0) | |
43 | return 0; | |
44 | ||
45 | return atomic_read(&dev_priv->vbl_received); | |
46 | } | |
47 | ||
b5e89ed5 | 48 | irqreturn_t r128_driver_irq_handler(DRM_IRQ_ARGS) |
1da177e4 | 49 | { |
eddca551 | 50 | struct drm_device *dev = (struct drm_device *) arg; |
b5e89ed5 | 51 | drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; |
1da177e4 LT |
52 | int status; |
53 | ||
b5e89ed5 DA |
54 | status = R128_READ(R128_GEN_INT_STATUS); |
55 | ||
1da177e4 | 56 | /* VBLANK interrupt */ |
b5e89ed5 DA |
57 | if (status & R128_CRTC_VBLANK_INT) { |
58 | R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK); | |
0a3e67a4 JB |
59 | atomic_inc(&dev_priv->vbl_received); |
60 | drm_handle_vblank(dev, 0); | |
1da177e4 LT |
61 | return IRQ_HANDLED; |
62 | } | |
63 | return IRQ_NONE; | |
64 | } | |
65 | ||
0a3e67a4 | 66 | int r128_enable_vblank(struct drm_device *dev, int crtc) |
1da177e4 | 67 | { |
0a3e67a4 | 68 | drm_r128_private_t *dev_priv = dev->dev_private; |
1da177e4 | 69 | |
0a3e67a4 JB |
70 | if (crtc != 0) { |
71 | DRM_ERROR("%s: bad crtc %d\n", __func__, crtc); | |
72 | return -EINVAL; | |
73 | } | |
ac741ab7 | 74 | |
0a3e67a4 JB |
75 | R128_WRITE(R128_GEN_INT_CNTL, R128_CRTC_VBLANK_INT_EN); |
76 | return 0; | |
77 | } | |
78 | ||
79 | void r128_disable_vblank(struct drm_device *dev, int crtc) | |
80 | { | |
81 | if (crtc != 0) | |
82 | DRM_ERROR("%s: bad crtc %d\n", __func__, crtc); | |
1da177e4 | 83 | |
0a3e67a4 JB |
84 | /* |
85 | * FIXME: implement proper interrupt disable by using the vblank | |
86 | * counter register (if available) | |
87 | * | |
88 | * R128_WRITE(R128_GEN_INT_CNTL, | |
89 | * R128_READ(R128_GEN_INT_CNTL) & ~R128_CRTC_VBLANK_INT_EN); | |
90 | */ | |
1da177e4 LT |
91 | } |
92 | ||
eddca551 | 93 | void r128_driver_irq_preinstall(struct drm_device * dev) |
b5e89ed5 DA |
94 | { |
95 | drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; | |
1da177e4 LT |
96 | |
97 | /* Disable *all* interrupts */ | |
b5e89ed5 | 98 | R128_WRITE(R128_GEN_INT_CNTL, 0); |
1da177e4 | 99 | /* Clear vblank bit if it's already high */ |
b5e89ed5 | 100 | R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK); |
1da177e4 LT |
101 | } |
102 | ||
0a3e67a4 | 103 | int r128_driver_irq_postinstall(struct drm_device *dev) |
b5e89ed5 | 104 | { |
52440211 | 105 | return 0; |
1da177e4 LT |
106 | } |
107 | ||
eddca551 | 108 | void r128_driver_irq_uninstall(struct drm_device * dev) |
b5e89ed5 DA |
109 | { |
110 | drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; | |
1da177e4 LT |
111 | if (!dev_priv) |
112 | return; | |
113 | ||
114 | /* Disable *all* interrupts */ | |
b5e89ed5 | 115 | R128_WRITE(R128_GEN_INT_CNTL, 0); |
1da177e4 | 116 | } |