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/***************************************************************************
* __________ __ ___.
* 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
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