1 /*
2 * Copyright (C) 2009 Francisco Jerez.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 *
25 */
26
27 #include "drmP.h"
28 #include "nouveau_drv.h"
29 #include "nouveau_hw.h"
30 #include "nouveau_gpio.h"
31
32 int
nv10_gpio_sense(struct drm_device * dev,int line)33 nv10_gpio_sense(struct drm_device *dev, int line)
34 {
35 if (line < 2) {
36 line = line * 16;
37 line = NVReadCRTC(dev, 0, NV_PCRTC_GPIO) >> line;
38 return !!(line & 0x0100);
39 } else
40 if (line < 10) {
41 line = (line - 2) * 4;
42 line = NVReadCRTC(dev, 0, NV_PCRTC_GPIO_EXT) >> line;
43 return !!(line & 0x04);
44 } else
45 if (line < 14) {
46 line = (line - 10) * 4;
47 line = NVReadCRTC(dev, 0, NV_PCRTC_850) >> line;
48 return !!(line & 0x04);
49 }
50
51 return -EINVAL;
52 }
53
54 int
nv10_gpio_drive(struct drm_device * dev,int line,int dir,int out)55 nv10_gpio_drive(struct drm_device *dev, int line, int dir, int out)
56 {
57 u32 reg, mask, data;
58
59 if (line < 2) {
60 line = line * 16;
61 reg = NV_PCRTC_GPIO;
62 mask = 0x00000011;
63 data = (dir << 4) | out;
64 } else
65 if (line < 10) {
66 line = (line - 2) * 4;
67 reg = NV_PCRTC_GPIO_EXT;
68 mask = 0x00000003 << ((line - 2) * 4);
69 data = (dir << 1) | out;
70 } else
71 if (line < 14) {
72 line = (line - 10) * 4;
73 reg = NV_PCRTC_850;
74 mask = 0x00000003;
75 data = (dir << 1) | out;
76 } else {
77 return -EINVAL;
78 }
79
80 mask = NVReadCRTC(dev, 0, reg) & ~(mask << line);
81 NVWriteCRTC(dev, 0, reg, mask | (data << line));
82 return 0;
83 }
84
85 void
nv10_gpio_irq_enable(struct drm_device * dev,int line,bool on)86 nv10_gpio_irq_enable(struct drm_device *dev, int line, bool on)
87 {
88 u32 mask = 0x00010001 << line;
89
90 nv_wr32(dev, 0x001104, mask);
91 nv_mask(dev, 0x001144, mask, on ? mask : 0);
92 }
93
94 static void
nv10_gpio_isr(struct drm_device * dev)95 nv10_gpio_isr(struct drm_device *dev)
96 {
97 u32 intr = nv_rd32(dev, 0x1104);
98 u32 hi = (intr & 0x0000ffff) >> 0;
99 u32 lo = (intr & 0xffff0000) >> 16;
100
101 nouveau_gpio_isr(dev, 0, hi | lo);
102
103 nv_wr32(dev, 0x001104, intr);
104 }
105
106 int
nv10_gpio_init(struct drm_device * dev)107 nv10_gpio_init(struct drm_device *dev)
108 {
109 nv_wr32(dev, 0x001140, 0x00000000);
110 nv_wr32(dev, 0x001100, 0xffffffff);
111 nv_wr32(dev, 0x001144, 0x00000000);
112 nv_wr32(dev, 0x001104, 0xffffffff);
113 nouveau_irq_register(dev, 28, nv10_gpio_isr); /* PBUS */
114 return 0;
115 }
116
117 void
nv10_gpio_fini(struct drm_device * dev)118 nv10_gpio_fini(struct drm_device *dev)
119 {
120 nv_wr32(dev, 0x001140, 0x00000000);
121 nv_wr32(dev, 0x001144, 0x00000000);
122 nouveau_irq_unregister(dev, 28);
123 }
124