1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/* Copyright (c) 2003-2007 Advanced Micro Devices, Inc.
*
* 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 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 THE
* AUTHORS OR COPYRIGHT HOLDERS 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.
*
* Neither the name of the Advanced Micro Devices, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
* */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "xf86.h"
#include "xf86Modes.h"
#include "compiler.h"
#include "geode.h"
#ifdef XSERVER_LIBPCIACCESS
#include <pciaccess.h>
#endif
/* GPIO Register defines from the CS5536 datasheet */
#define GPIO_OUT 0x00
#define GPIO_OUT_ENABLE 0x04
#define GPIO_OUT_AUX1 0x10
#define GPIO_IN_ENABLE 0x20
#define GPIO_IN 0x30
#define GPIO_IN_AUX1 0x34
/* The DDC pins are defined to be on GPIO pins 3 and 4 */
#define DDC_SCL_PIN (1 << 3)
#define DDC_SDA_PIN (1 << 4)
#define DDC_DATA_HIGH DDC_SDA_PIN
#define DDC_DATA_LOW (DDC_SDA_PIN << 16)
#define DDC_CLK_HIGH DDC_SCL_PIN
#define DDC_CLK_LOW (DDC_SCL_PIN << 16)
#define CS5536_ISA_DEVICE 0x20901022
#define CS5535_ISA_DEVICE 0x002b100b
static unsigned short
geode_gpio_iobase(void)
{
#ifdef XSERVER_LIBPCIACCESS
struct pci_device *pci;
/* The CS5536 GPIO device is always in the same slot: 00:0f.0 */
pci = pci_device_find_by_slot(0, 0, 0xF, 0x0);
if (pci == NULL)
return 0;
/* The GPIO I/O address is in resource 1 */
return (unsigned short)pci->regions[1].base_addr;
#else
PCITAG Tag;
Tag = pciFindFirst(CS5536_ISA_DEVICE, 0xFFFFFFFF);
if (Tag == PCI_NOT_FOUND) {
Tag = pciFindFirst(CS5535_ISA_DEVICE, 0xFFFFFFFF);
if (Tag == PCI_NOT_FOUND)
return 0;
}
/* The GPIO I/O address is in resource 1 */
return (unsigned short)(pciReadLong(Tag, 0x14) & ~1);
#endif
}
static void
geode_ddc_putbits(I2CBusPtr b, int scl, int sda)
{
unsigned long iobase = (unsigned long)b->DriverPrivate.ptr;
unsigned long dat;
dat = scl ? DDC_CLK_HIGH : DDC_CLK_LOW;
dat |= sda ? DDC_DATA_HIGH : DDC_DATA_LOW;
outl(iobase + GPIO_OUT, dat);
}
static void
geode_ddc_getbits(I2CBusPtr b, int *scl, int *sda)
{
unsigned long iobase = (unsigned long)b->DriverPrivate.ptr;
unsigned long dat = inl(iobase + GPIO_IN);
*scl = (dat & DDC_CLK_HIGH) ? 1 : 0;
*sda = (dat & DDC_DATA_HIGH) ? 1 : 0;
}
static xf86MonPtr
GeodeGetDDC(ScrnInfoPtr pScrni)
{
xf86MonPtr mon = NULL;
I2CBusPtr bus;
unsigned long ddciobase;
ddciobase = geode_gpio_iobase();
if (ddciobase == 0) {
xf86DrvMsg(pScrni->scrnIndex, X_ERROR,
"Could not find the GPIO I/O base\n");
return NULL;
}
/* The GPIO pins for DDC are multiplexed with a
* serial port. If that serial port is enabled, then
* assume that there is no DDC on the board
*/
if ((inl(ddciobase + GPIO_IN_AUX1) & DDC_CLK_HIGH) ||
(inl(ddciobase + GPIO_OUT_AUX1) & DDC_DATA_HIGH)) {
xf86DrvMsg(pScrni->scrnIndex, X_ERROR,
"GPIO pins are in serial mode. Assuming no DDC\n");
return NULL;
}
/* Set up the pins */
outl(ddciobase + GPIO_OUT_ENABLE, DDC_DATA_HIGH | DDC_CLK_HIGH);
outl(ddciobase + GPIO_IN_ENABLE, DDC_DATA_HIGH | DDC_CLK_HIGH);
bus = xf86CreateI2CBusRec();
if (bus == NULL) {
xf86DrvMsg(pScrni->scrnIndex, X_ERROR,
"Could not create the I2C structre\n");
goto err;
}
bus->BusName = "CS5536 DDC BUS";
bus->scrnIndex = pScrni->scrnIndex;
bus->I2CGetBits = geode_ddc_getbits;
bus->I2CPutBits = geode_ddc_putbits;
bus->DriverPrivate.ptr = (void *)(ddciobase);
if (xf86I2CBusInit(bus)) {
mon = xf86DoEDID_DDC2(pScrni->scrnIndex, bus);
#if (XORG_VERSION_CURRENT >= XORG_VERSION_NUMERIC(1,4,99,0,0))
if (mon)
xf86DDCApplyQuirks(pScrni->scrnIndex, mon);
#endif
}
xf86DestroyI2CBusRec(bus, FALSE, FALSE);
err:
outl(ddciobase + GPIO_OUT_ENABLE, DDC_DATA_LOW | DDC_CLK_LOW);
outl(ddciobase + GPIO_IN_ENABLE, DDC_DATA_LOW | DDC_CLK_LOW);
return mon;
}
void
GeodeProbeDDC(ScrnInfoPtr pScrni, int index)
{
ConfiguredMonitor = GeodeGetDDC(pScrni);
}
xf86MonPtr
GeodeDoDDC(ScrnInfoPtr pScrni, int index)
{
xf86MonPtr info = NULL;
info = GeodeGetDDC(pScrni);
xf86PrintEDID(info);
xf86SetDDCproperties(pScrni, info);
return info;
}
|
