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rockbox/bootloader/gigabeat-s.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Greg White
*
* 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 "config.h"
#include "system.h"
#include <stdio.h>
#include <errno.h>
#include "../kernel-internal.h"
#include "gcc_extensions.h"
#include "string.h"
#include "adc.h"
#include "powermgmt.h"
#include "storage.h"
#include "file_internal.h"
#include "dir.h"
#include "file.h"
#include "disk.h"
#include "common.h"
#include "rb-loader.h"
#include "loader_strerror.h"
#include "power.h"
#include "backlight.h"
#include "usb.h"
#include "button.h"
#include "font.h"
#include "lcd.h"
#include "version.h"
/* Show the Rockbox logo - in show_logo.c */
extern void show_logo(void);
#define TAR_CHUNK 512
#define TAR_HEADER_SIZE 157
/* Where files sent via MTP are stored */
static const char basedir[] = "/Content/0b00/00/";
/* Can use memory after vector table up to 0x01f00000 */
static char * const tarbuf = (char *)0x00000040;
static const size_t tarbuf_size = 0x01f00000 - 0x00000040;
/* Firmware data */
static void * const load_buf = 0x00000000;
static const size_t load_buf_size = 0x20000000 - 0x100000;
static const void * const start_addr = 0x00000000;
/* Show a message + "Shutting down...", then power off the device */
static void display_message_and_power_off(int timeout, const char *msg)
{
verbose = true;
printf(msg);
printf("Shutting down...");
sleep(timeout);
power_off();
}
static void check_battery_safe(void)
{
if (battery_level_safe())
return;
display_message_and_power_off(HZ, "Battery low");
}
/* TODO: Handle charging while connected */
static void handle_usb(int connect_timeout)
{
long end_tick = 0;
int button;
/* We need full button and backlight handling now */
backlight_init();
button_init();
backlight_on();
/* Start the USB driver */
usb_init();
usb_start_monitoring();
/* Wait for threads to connect or cable is pulled */
printf("USB: Connecting");
if (connect_timeout != TIMEOUT_BLOCK)
end_tick = current_tick + connect_timeout;
while (1)
{
button = button_get_w_tmo(HZ/2);
if (button == SYS_USB_CONNECTED)
break; /* Hit */
if (connect_timeout != TIMEOUT_BLOCK &&
TIME_AFTER(current_tick, end_tick))
{
/* Timed out waiting for the connect - will happen when connected
* to a charger through the USB port */
printf("USB: Timed out");
break;
}
if (usb_plugged() == USB_EXTRACTED)
break; /* Cable pulled */
}
if (button == SYS_USB_CONNECTED)
{
/* Switch to verbose mode if not in it so that the status updates
* are shown */
verbose = true;
/* Got the message - wait for disconnect */
printf("Bootloader USB mode");
usb_acknowledge(SYS_USB_CONNECTED_ACK);
while (1)
{
button = button_get_w_tmo(HZ/2);
if (button == SYS_USB_DISCONNECTED)
break;
check_battery_safe();
}
backlight_on();
/* Sleep a little to let the backlight ramp up */
sleep(HZ*5/4);
}
/* Put drivers initialized for USB connection into a known state */
usb_close();
button_close();
backlight_close();
}
static void untar(int tar_fd)
{
char header[TAR_HEADER_SIZE];
char *ptr;
char path[102];
int fd, i;
int ret;
size_t size = filesize(tar_fd);
if (size > tarbuf_size)
{
printf("tar file too large"); /* Paranoid but proper */
return;
}
ret = read(tar_fd, tarbuf, filesize(tar_fd));
if (ret < 0)
{
printf("couldn't read tar file (%d)", ret);
return;
}
ptr = tarbuf;
while (1)
{
memcpy(header, ptr, TAR_HEADER_SIZE);
if (*header == '\0') /* Check for EOF */
break;
/* Parse the size field */
size = 0;
for (i = 124 ; i < 124 + 11 ; i++) {
size = (8 * size) + header[i] - '0';
}
/* Skip rest of header */
ptr += TAR_CHUNK;
/* Make the path absolute */
strcpy(path, "/");
strcat(path, header);
if (header[156] == '0') /* file */
{
int wc;
fd = creat(path, 0666);
if (fd < 0)
{
printf("failed to create file (%d)", fd);
}
else
{
wc = write(fd, ptr, size);
if (wc < 0)
{
printf("write failed (%d)", wc);
break;
}
close(fd);
}
ptr += (size + TAR_CHUNK-1) & (~(TAR_CHUNK-1));
}
else if (header[156] == '5') /* directory */
{
int ret;
/* Remove the trailing slash */
if (path[strlen(path) - 1] == '/')
path[strlen(path) - 1] = '\0';
/* Create the dir */
ret = mkdir(path);
if (ret < 0 && errno != EEXIST)
{
printf("failed to create dir (%d)", ret);
}
}
}
}
/* Look for a tar file or rockbox binary in the MTP directory */
static void handle_untar(void)
{
char buf[MAX_PATH];
char tarstring[6];
char model[5];
struct dirent* entry;
DIR* dir;
int fd;
int rc;
dir = opendir(basedir);
while ((entry = readdir(dir)))
{
if (*entry->d_name == '.')
continue;
snprintf(buf, sizeof(buf), "%s%s", basedir, entry->d_name);
fd = open(buf, O_RDONLY);
if (fd < 0)
continue;
/* Check whether the file is a rockbox binary. */
lseek(fd, 4, SEEK_SET);
rc = read(fd, model, 4);
if (rc == 4)
{
model[4] = 0;
if (strcmp(model, "gigs") == 0)
{
verbose = true;
printf("Found rockbox binary. Moving...");
close(fd);
int ret = rename(buf, BOOTDIR "/" BOOTFILE);
printf("returned %d", ret);
sleep(HZ);
break;
}
}
/* Check whether the file is a tar file. */
lseek(fd, 257, SEEK_SET);
rc = read(fd, tarstring, 5);
if (rc == 5)
{
tarstring[5] = 0;
if (strcmp(tarstring, "ustar") == 0)
{
verbose = true;
printf("Found tar file. Unarchiving...");
lseek(fd, 0, SEEK_SET);
untar(fd);
close(fd);
printf("Removing tar file");
remove(buf);
break;
}
}
close(fd);
}
}
/* Try to load the firmware and run it */
static void NORETURN_ATTR handle_firmware_load(void)
{
int rc = load_firmware(load_buf, BOOTFILE, load_buf_size);
if(rc <= EFILE_EMPTY)
error(EBOOTFILE, rc, true);
/* Pause to look at messages */
while (1)
{
int button = button_read_device();
/* Ignore settings reset */
if (button == BUTTON_NONE || button == BUTTON_MENU)
break;
sleep(HZ/5);
check_battery_safe();
/* If the disk powers off, the firmware will lock at startup */
storage_spin();
}
/* Put drivers into a known state */
button_close_device();
storage_close();
system_prepare_fw_start();
commit_discard_idcache();
asm volatile ("bx %0": : "r"(start_addr));
/* Halt */
while (1)
core_idle();
}
void main(void)
{
int rc;
int batt;
system_init();
kernel_init();
/* Keep button_device_init early to delay calls to button_read_device */
button_init_device();
lcd_init();
font_init();
show_logo();
lcd_clear_display();
if (button_hold())
display_message_and_power_off(HZ, "Hold switch on");
if (button_read_device() != BUTTON_NONE)
verbose = true;
printf("Gigabeat S Rockbox Bootloader");
printf("Version %s", rbversion);
adc_init();
batt = _battery_voltage();
printf("Battery: %d.%03d V", batt / 1000, batt % 1000);
check_battery_safe();
rc = storage_init();
if(rc)
error(EATA, rc, true);
filesystem_init();
rc = disk_mount_all();
if (rc <= 0)
error(EDISK, rc, true);
printf("Init complete");
/* Do USB first since a tar or binary could be added to the MTP directory
* at the time and we can untar or move after unplugging. */
if (usb_plugged() == USB_INSERTED)
handle_usb(HZ*2);
handle_untar();
handle_firmware_load(); /* No return */
}
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