1/* Copyright (c) 2006 Advanced Micro Devices, Inc.
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to
5 * deal in the Software without restriction, including without limitation the
6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7 * sell copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19 * IN THE SOFTWARE.
20 *
21 * Neither the name of the Advanced Micro Devices, Inc. nor the names of its
22 * contributors may be used to endorse or promote products derived from this
23 * software without specific prior written permission.
24 * */
25
26#ifdef HAVE_CONFIG_H
27#include "config.h"
28#endif
29
30#include "xorg-server.h"
31
32/* Includes that are used by all drivers */
33#include <xf86.h>
34#include <xf86Modes.h>
35#include <xf86_OSproc.h>
36#include <compiler.h>
37
38#include "geode.h"
39#include <unistd.h>
40#include <fcntl.h>
41
42#define DCON_SLEEP_FILE "/sys/devices/platform/dcon/sleep"
43#define DCON_FREEZE_FILE "/sys/devices/platform/dcon/freeze"
44
45static Bool
46dcon_present(void)
47{
48    static int _dval = -1;
49
50    if (_dval == -1)
51        _dval = (access("/sys/class/power_supply/olpc-ac", F_OK) == 0);
52
53    return (Bool) _dval;
54}
55
56int
57DCONDPMSSet(ScrnInfoPtr pScrni, int mode)
58{
59    static int failed = -1;
60    ssize_t ret;
61    int fd;
62    char value[1];
63
64    if (failed == -1)
65        failed = !dcon_present();
66
67    if (failed)
68        return 0;
69
70    /* If the DCON is frozen, don't power it down, it was probably frozen
71     * for a reason and powering it down would corrupt the display.
72     * This is needed to avoid losing OLPC's frozen boot image during X
73     * startup, where DPMS is used to power down and up the display.
74     * When geode uses KMS this will not be needed as the system realises
75     * that no mode change is needed and the display power is untouched. */
76    fd = open(DCON_FREEZE_FILE, O_RDONLY);
77    if (fd < 0) {
78        failed = 1;
79        return 0;
80    }
81
82    ret = read(fd, value, 1);
83    close(fd);
84    if (ret == 1) {
85        if (value[0] == '1')
86            return 0;
87    }
88
89    fd = open(DCON_SLEEP_FILE, O_WRONLY);
90
91    if (fd < 0) {
92        failed = 1;
93        return 0;
94    }
95
96    switch (mode) {
97    case DPMSModeOn:
98        value[0] = '0';
99        break;
100    case DPMSModeStandby:
101    case DPMSModeSuspend:
102    case DPMSModeOff:
103        value[0] = '1';
104        break;
105    }
106
107    ret = write(fd, value, sizeof(value));
108    close(fd);
109
110    if (ret < 0) {
111        failed = 1;
112        return 0;
113    }
114
115    return 1;
116}
117
118Bool
119dcon_init(ScrnInfoPtr pScrni)
120{
121    GeodeRec *pGeode = GEODEPTR(pScrni);
122
123    pGeode->mm_width = 0;
124    pGeode->mm_height = 0;
125
126    if (!dcon_present()) {
127        xf86DrvMsg(pScrni->scrnIndex, X_DEFAULT, "No DCON is present\n");
128        return FALSE;
129    }
130
131    pGeode->panelMode = xnfcalloc(1, sizeof(DisplayModeRec));
132    if (pGeode->panelMode == NULL)
133        return FALSE;
134
135    /* Set up the panel mode structure automagically */
136
137    pGeode->panelMode->type = M_T_DRIVER | M_T_PREFERRED;
138    pGeode->panelMode->Clock = 57275;
139    pGeode->panelMode->HDisplay = 1200;
140    pGeode->panelMode->HSyncStart = 1208;
141    pGeode->panelMode->HSyncEnd = 1216;
142    pGeode->panelMode->HTotal = 1240;
143    pGeode->panelMode->VDisplay = 900;
144    pGeode->panelMode->VSyncStart = 905;
145    pGeode->panelMode->VSyncEnd = 908;
146    pGeode->panelMode->VTotal = 912;
147    pGeode->panelMode->Flags = V_NHSYNC | V_NVSYNC;
148
149    pGeode->mm_width = 152;
150    pGeode->mm_height = 114;
151
152    xf86SetModeDefaultName(pGeode->panelMode);
153
154    /* TODO: Print board revision once sysfs exports it. */
155    xf86DrvMsg(pScrni->scrnIndex, X_DEFAULT, "DCON detected.\n");
156
157    return TRUE;
158}
159