f35d63bc21
The GPIO APIs for ypr0 and ypr1 targets was messy, requiring a direct communication via several ioctls calls. Since it is planned to add support to other devices, more GPIO are going to be used. For that reason the functions shall be clear and easy to use. Change-Id: Ia2304335e1fed1305cc2c4320bd4c097e13079be
285 lines
7.2 KiB
C
285 lines
7.2 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_get(GPIO_SD_SENSE));
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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_set_iomux(GPIO_SD_SENSE, CONFIG_DEFAULT);
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gpio_set_pad(GPIO_SD_SENSE, PAD_CTL_SRE_SLOW);
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gpio_direction_input(GPIO_SD_SENSE);
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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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