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
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
|
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
*
* Copyright (C) 2011-2013 by Lorenzo Miori
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdlib.h>
#include <inttypes.h>
#include <unistd.h>
#include <sys/mount.h>
#include <errno.h>
#include "system.h"
#include "kernel.h"
#include "thread.h"
#include "string-extra.h"
#include "panic.h"
#include "debug.h"
#include "storage.h"
#include "mv.h"
#include "ascodec.h"
#include "gpio-ypr.h"
#include "ascodec.h"
#include "backlight.h"
#include "rbunicode.h"
#include "logdiskf.h"
void power_off(void)
{
/* Something that we need to do before exit on our platform YPR0 */
ascodec_close();
gpio_close();
exit(EXIT_SUCCESS);
}
uintptr_t *stackbegin;
uintptr_t *stackend;
void system_init(void)
{
int *s;
/* fake stack, OS manages size (and growth) */
stackbegin = stackend = (uintptr_t*)&s;
/* Here begins our platform specific initilization for various things */
ascodec_init();
gpio_init();
}
void system_reboot(void)
{
power_off();
}
void system_exception_wait(void)
{
system_reboot();
}
#ifdef HAVE_MULTIDRIVE
/* MicroSD card removal / insertion management */
bool hostfs_removable(IF_MD_NONVOID(int drive))
{
#ifdef HAVE_MULTIDRIVE
if (drive > 0) /* Active LOW */
return true;
else
#endif
return false; /* internal: always present */
}
bool hostfs_present(IF_MD_NONVOID(int drive))
{
#ifdef HAVE_MULTIDRIVE
if (drive > 0) /* Active LOW */
return (!gpio_get(GPIO_SD_SENSE));
else
#endif
return true; /* internal: always present */
}
#ifdef HAVE_MULTIDRIVE
int volume_drive(int drive)
{
return drive;
}
#endif /* HAVE_MULTIDRIVE */
#ifdef CONFIG_STORAGE_MULTI
int hostfs_driver_type(int drive)
{
return drive > 0 ? STORAGE_SD_NUM : STORAGE_HOSTFS_NUM;
}
#endif /* CONFIG_STORAGE_MULTI */
#ifdef HAVE_HOTSWAP
bool volume_removable(int volume)
{
/* don't support more than one partition yet, so volume == drive */
return hostfs_removable(volume);
}
bool volume_present(int volume)
{
/* don't support more than one partition yet, so volume == drive */
return hostfs_present(volume);
}
#endif
static int unmount_sd(void)
{
int ret;
do
{
ret = umount("/mnt/mmc");
} while (ret && errno != EBUSY && errno != EINVAL);
return ret;
}
static int mount_sd(void)
{
int ret;
/* kludge to make sure we get our wanted mount flags. This is needed
* when the sd was already mounted before we booted */
unmount_sd();
ret = mount("/dev/mmcblk0p1", "/mnt/mmc", "vfat",
MS_MGC_VAL | MS_SYNCHRONOUS | MS_RELATIME,
"iocharset=utf8");
/* failure probably means the kernel does not support the iocharset.
* retry without to load the default */
if (ret == -1)
ret = mount("/dev/mmcblk0p1", "/mnt/mmc", "vfat",
MS_MGC_VAL | MS_SYNCHRONOUS | MS_RELATIME, NULL);
return ret;
}
#ifdef HAVE_HOTSWAP
static int sd_thread_stack[DEFAULT_STACK_SIZE];
enum {
STATE_POLL,
STATE_DEBOUNCE,
STATE_MOUNT,
};
static void NORETURN_ATTR sd_thread(void)
{
int ret, state = STATE_POLL;
bool last_present, present;
int attempts = 0;
last_present = present = storage_present(1); /* shut up gcc */
while (1)
{
switch (state)
{
case STATE_POLL:
sleep(HZ/3);
attempts = 0;
present = storage_present(1);
if (last_present != present)
state = STATE_DEBOUNCE;
break;
case STATE_DEBOUNCE:
sleep(HZ/5);
present = storage_present(1);
if (last_present == present)
{
if (present)
queue_broadcast(SYS_HOTSWAP_INSERTED, 0);
else
queue_broadcast(SYS_HOTSWAP_EXTRACTED, 0);
state = STATE_MOUNT;
}
else
state = STATE_POLL;
break;
case STATE_MOUNT:
sleep(HZ/10);
if (present)
ret = mount_sd();
else
ret = unmount_sd();
if (ret == 0)
{
NOTEF("Successfully %smounted SD card\n", present ? "":"un");
queue_broadcast(SYS_FS_CHANGED, 0);
state = STATE_POLL;
}
else if (++attempts > 20) /* stop retrying after 2s */
{
ERRORF("Failed to %smount SD card. Giving up.", present ? "":"un");
state = STATE_POLL;
}
/* else: need to retry a few times because the kernel is
* busy setting up the SD (=> do not change state) */
break;
}
last_present = present;
}
}
#endif
#endif /* HAVE_MULTIDRIVE */
int hostfs_init(void)
{
/* Setup GPIO pin for microSD sense, copied from OF */
gpio_set_iomux(GPIO_SD_SENSE, CONFIG_DEFAULT);
gpio_set_pad(GPIO_SD_SENSE, PAD_CTL_SRE_SLOW);
gpio_direction_input(GPIO_SD_SENSE);
#ifdef HAVE_MULTIDRIVE
if (storage_present(IF_MD(1)))
mount_sd();
#ifdef HAVE_HOTSWAP
create_thread(sd_thread, sd_thread_stack, sizeof(sd_thread_stack), 0,
"sd thread" IF_PRIO(, PRIORITY_BACKGROUND) IF_COP(, CPU));
#endif
#endif
return 0;
}
int hostfs_flush(void)
{
sync();
return 0;
}
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
#include <stdio.h>
#include "file.h"
/* This is the Linux Kernel CPU governor... */
static void set_cpu_freq(int speed)
{
char temp[10];
int cpu_dev;
cpu_dev = open("/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed", O_WRONLY);
if (cpu_dev < 0)
return;
write(cpu_dev, temp, sprintf(temp, "%d", speed) + 1);
close(cpu_dev);
}
void set_cpu_frequency(long frequency)
{
switch (frequency)
{
case CPUFREQ_MAX:
set_cpu_freq(532000);
cpu_frequency = CPUFREQ_MAX;
break;
case CPUFREQ_NORMAL:
set_cpu_freq(400000);
cpu_frequency = CPUFREQ_NORMAL;
break;
default:
set_cpu_freq(200000);
cpu_frequency = CPUFREQ_DEFAULT;
break;
}
}
#endif
int volume_partition(int volume)
{
(void)volume;
/* Hosted only implement a single parition per "drive" */
return 0;
}
|