284 lines
7.3 KiB
C
284 lines
7.3 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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*
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* Copyright (C) 2011-2013 by Lorenzo Miori
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <stdlib.h>
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#include <inttypes.h>
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#include <unistd.h>
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#include <sys/mount.h>
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#include <errno.h>
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#include "system.h"
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#include "kernel.h"
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#include "thread.h"
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#include "string-extra.h"
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#include "panic.h"
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#include "debug.h"
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#include "storage.h"
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#include "mv.h"
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#include "ascodec.h"
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#include "gpio-ypr.h"
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#include "ascodec.h"
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#include "backlight.h"
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#include "rbunicode.h"
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#include "logdiskf.h"
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void power_off(void)
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{
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/* Something that we need to do before exit on our platform YPR0 */
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ascodec_close();
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gpio_close();
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exit(EXIT_SUCCESS);
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}
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uintptr_t *stackbegin;
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uintptr_t *stackend;
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void system_init(void)
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{
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int *s;
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/* fake stack, OS manages size (and growth) */
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stackbegin = stackend = (uintptr_t*)&s;
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/* Here begins our platform specific initilization for various things */
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ascodec_init();
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gpio_init();
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}
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void system_reboot(void)
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{
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power_off();
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}
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void system_exception_wait(void)
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{
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system_reboot();
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}
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#ifdef HAVE_MULTIDRIVE
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/* MicroSD card removal / insertion management */
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bool hostfs_removable(IF_MD_NONVOID(int drive))
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{
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#ifdef HAVE_MULTIDRIVE
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if (drive > 0) /* Active LOW */
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return true;
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else
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#endif
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return false; /* internal: always present */
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}
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bool hostfs_present(IF_MD_NONVOID(int drive))
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{
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#ifdef HAVE_MULTIDRIVE
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if (drive > 0) /* Active LOW */
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return (!gpio_control(DEV_CTRL_GPIO_IS_HIGH, GPIO_SD_SENSE, 0, 0));
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else
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#endif
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return true; /* internal: always present */
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}
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#ifdef HAVE_MULTIDRIVE
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int volume_drive(int drive)
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{
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return drive;
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}
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#endif /* HAVE_MULTIDRIVE */
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#ifdef CONFIG_STORAGE_MULTI
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int hostfs_driver_type(int drive)
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{
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return drive > 0 ? STORAGE_SD_NUM : STORAGE_HOSTFS_NUM;
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}
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#endif /* CONFIG_STORAGE_MULTI */
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#ifdef HAVE_HOTSWAP
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bool volume_removable(int volume)
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{
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/* don't support more than one partition yet, so volume == drive */
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return hostfs_removable(volume);
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}
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bool volume_present(int volume)
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{
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/* don't support more than one partition yet, so volume == drive */
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return hostfs_present(volume);
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}
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#endif
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static int unmount_sd(void)
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{
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int ret;
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do
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{
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ret = umount("/mnt/mmc");
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} while (ret && errno != EBUSY && errno != EINVAL);
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return ret;
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}
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static int mount_sd(void)
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{
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int ret;
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/* kludge to make sure we get our wanted mount flags. This is needed
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* when the sd was already mounted before we booted */
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unmount_sd();
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char iocharset[64] = "iocharset=";
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strlcat(iocharset, get_current_codepage_name_linux(), sizeof(iocharset));
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ret = mount("/dev/mmcblk0p1", "/mnt/mmc", "vfat",
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MS_MGC_VAL | MS_SYNCHRONOUS | MS_RELATIME,
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iocharset);
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/* failure probably means the kernel does not support the iocharset.
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* retry without to load the default */
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if (ret == -1)
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ret = mount("/dev/mmcblk0p1", "/mnt/mmc", "vfat",
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MS_MGC_VAL | MS_SYNCHRONOUS | MS_RELATIME, NULL);
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return ret;
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}
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#ifdef HAVE_HOTSWAP
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static int sd_thread_stack[DEFAULT_STACK_SIZE];
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enum {
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STATE_POLL,
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STATE_DEBOUNCE,
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STATE_MOUNT,
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};
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static void NORETURN_ATTR sd_thread(void)
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{
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int ret, state = STATE_POLL;
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bool last_present, present;
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int attempts = 0;
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last_present = present = storage_present(1); /* shut up gcc */
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while (1)
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{
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switch (state)
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{
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case STATE_POLL:
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sleep(HZ/3);
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attempts = 0;
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present = storage_present(1);
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if (last_present != present)
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state = STATE_DEBOUNCE;
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break;
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case STATE_DEBOUNCE:
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sleep(HZ/5);
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present = storage_present(1);
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if (last_present == present)
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{
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if (present)
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queue_broadcast(SYS_HOTSWAP_INSERTED, 0);
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else
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queue_broadcast(SYS_HOTSWAP_EXTRACTED, 0);
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state = STATE_MOUNT;
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}
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else
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state = STATE_POLL;
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break;
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case STATE_MOUNT:
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sleep(HZ/10);
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if (present)
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ret = mount_sd();
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else
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ret = unmount_sd();
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if (ret == 0)
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{
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NOTEF("Successfully %smounted SD card\n", present ? "":"un");
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queue_broadcast(SYS_FS_CHANGED, 0);
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state = STATE_POLL;
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}
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else if (++attempts > 20) /* stop retrying after 2s */
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{
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ERRORF("Failed to %smount SD card. Giving up.", present ? "":"un");
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state = STATE_POLL;
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}
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/* else: need to retry a few times because the kernel is
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* busy setting up the SD (=> do not change state) */
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break;
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}
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last_present = present;
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}
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}
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#endif
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#endif /* HAVE_MULTIDRIVE */
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int hostfs_init(void)
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{
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/* Setup GPIO pin for microSD sense, copied from OF */
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gpio_control(DEV_CTRL_GPIO_SET_MUX, GPIO_SD_SENSE, CONFIG_DEFAULT, 0);
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gpio_control(DEV_CTRL_GPIO_SET_INPUT, GPIO_SD_SENSE, CONFIG_DEFAULT, 0);
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#ifdef HAVE_MULTIDRIVE
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if (storage_present(IF_MD(1)))
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mount_sd();
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#ifdef HAVE_HOTSWAP
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create_thread(sd_thread, sd_thread_stack, sizeof(sd_thread_stack), 0,
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"sd thread" IF_PRIO(, PRIORITY_BACKGROUND) IF_COP(, CPU));
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#endif
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#endif
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return 0;
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}
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int hostfs_flush(void)
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{
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sync();
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return 0;
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}
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#ifdef HAVE_ADJUSTABLE_CPU_FREQ
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#include <stdio.h>
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#include "file.h"
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/* This is the Linux Kernel CPU governor... */
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static void set_cpu_freq(int speed)
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{
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char temp[10];
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int cpu_dev;
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cpu_dev = open("/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed", O_WRONLY);
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if (cpu_dev < 0)
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return;
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write(cpu_dev, temp, sprintf(temp, "%d", speed) + 1);
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close(cpu_dev);
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}
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void set_cpu_frequency(long frequency)
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{
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switch (frequency)
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{
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case CPUFREQ_MAX:
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set_cpu_freq(532000);
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cpu_frequency = CPUFREQ_MAX;
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break;
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case CPUFREQ_NORMAL:
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set_cpu_freq(400000);
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cpu_frequency = CPUFREQ_NORMAL;
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break;
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default:
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set_cpu_freq(200000);
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cpu_frequency = CPUFREQ_DEFAULT;
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break;
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}
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}
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#endif
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