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rockbox/bootloader/gigabeat-s.c
Daniel Stenberg 2acc0ac542 Updated our source code header to explicitly mention that we are GPL v2 or 
later. We still need to hunt down snippets used that are not. 1324 modified
files...
http://www.rockbox.org/mail/archive/rockbox-dev-archive-2008-06/0060.shtml


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17847 a1c6a512-1295-4272-9138-f99709370657
2008-06-28 18:10:04 +00:00

378 lines
9.1 KiB
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 <sprintf.h>
#include "kernel.h"
#include "string.h"
#include "adc.h"
#include "powermgmt.h"
#include "ata.h"
#include "dir.h"
#include "disk.h"
#include "common.h"
#include "backlight.h"
#include "usb.h"
#include "button.h"
#include "font.h"
#include "lcd.h"
#include "usb-target.h"
#define TAR_CHUNK 512
#define TAR_HEADER_SIZE 157
const char version[] = APPSVERSION;
/* 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;
static void show_splash(int timeout, const char *msg)
{
backlight_on();
reset_screen();
lcd_putsxy( (LCD_WIDTH - (SYSFONT_WIDTH * strlen(msg))) / 2,
(LCD_HEIGHT - SYSFONT_HEIGHT) / 2, msg);
lcd_update();
sleep(timeout);
}
static bool pause_if_button_pressed(bool pre_usb)
{
while (1)
{
int button = button_read_device();
if (pre_usb && !usb_plugged())
return false;
/* Exit if no button or only the menu (settings reset) button */
switch (button)
{
case BUTTON_MENU:
case BUTTON_NONE:
return true;
}
sleep(HZ/5);
/* If the disk powers off, the firmware will lock at startup */
ata_spin();
}
}
/* TODO: Handle charging while connected */
static void handle_usb(void)
{
int button;
/* Check if plugged and pause to look at messages. If the cable was pulled
* while waiting, proceed as if it never was plugged. */
if (!usb_plugged() || !pause_if_button_pressed(true))
{
/* Bang on the controller */
usb_init_device();
return;
}
/** Enter USB mode **/
/* We need full button and backlight handling now */
backlight_init();
button_init();
/* Start the USB driver */
usb_init();
usb_start_monitoring();
/* Wait for threads to connect or cable is pulled */
show_splash(HZ/2, "Waiting for USB");
while (1)
{
button = button_get_w_tmo(HZ/2);
if (button == SYS_USB_CONNECTED)
break; /* Hit */
if (!usb_plugged())
break; /* Cable pulled */
}
if (button == SYS_USB_CONNECTED)
{
/* Got the message - wait for disconnect */
show_splash(0, "Bootloader USB mode");
usb_acknowledge(SYS_USB_CONNECTED_ACK);
while (1)
{
button = button_get(true);
if (button == SYS_USB_DISCONNECTED)
{
usb_acknowledge(SYS_USB_DISCONNECTED_ACK);
break;
}
}
}
/* Put drivers initialized for USB connection into a known state */
backlight_on();
usb_close();
button_close();
backlight_close();
reset_screen();
}
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);
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 && ret != -4)
{
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_uncached* entry;
DIR_UNCACHED* dir;
int fd;
int rc;
dir = opendir_uncached(basedir);
while ((entry = readdir_uncached(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)
{
printf("Found rockbox binary. Moving...");
close(fd);
remove("/.rockbox/rockbox.gigabeat");
int ret = rename(buf, "/.rockbox/rockbox.gigabeat");
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)
{
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 __attribute__((noreturn)) handle_firmware_load(void)
{
int rc = load_firmware(load_buf, "/.rockbox/rockbox.gigabeat",
load_buf_size);
if(rc < 0)
error(EBOOTFILE, rc);
/* Pause to look at messages */
pause_if_button_pressed(false);
/* Put drivers into a known state */
button_close_device();
ata_close();
system_prepare_fw_start();
if (rc == EOK)
{
invalidate_icache();
asm volatile ("bx %0": : "r"(start_addr));
}
/* Halt */
while (1)
core_idle();
}
static void check_battery(void)
{
int batt = battery_adc_voltage();
printf("Battery: %d.%03d V", batt / 1000, batt % 1000);
/* TODO: warn on low battery or shut down */
}
void main(void)
{
int rc;
/* Flush and invalidate all caches (because vectors were written) */
invalidate_icache();
lcd_clear_display();
printf("Gigabeat S Rockbox Bootloader");
printf("Version %s", version);
system_init();
kernel_init();
enable_interrupt(IRQ_FIQ_STATUS);
/* Initialize KPP so we can poll the button states */
button_init_device();
adc_init();
check_battery();
rc = ata_init();
if(rc)
{
reset_screen();
error(EATA, rc);
}
disk_init();
rc = disk_mount_all();
if (rc<=0)
{
error(EDISK,rc);
}
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. */
handle_usb();
handle_untar();
handle_firmware_load(); /* No return */
}
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