/bootloader/ipod.c
C | 435 lines | 277 code | 54 blank | 104 comment | 88 complexity | 18cee29e295d60438293889b8b899627 MD5 | raw file
- /***************************************************************************
- * __________ __ ___.
- * Open \______ \ ____ ____ | | _\_ |__ _______ ___
- * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
- * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
- * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
- * \/ \/ \/ \/ \/
- * $Id$
- *
- * Copyright (C) 2005 by Dave Chapman
- *
- * Based on Rockbox iriver bootloader by Linus Nielsen Feltzing
- * and the ipodlinux bootloader by Daniel Palffy and Bernard Leach
- *
- * 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 <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include <stdarg.h>
- #include "cpu.h"
- #include "system.h"
- #include "lcd.h"
- #include "kernel.h"
- #include "thread.h"
- #include "ata.h"
- #include "fat.h"
- #include "disk.h"
- #include "font.h"
- #include "adc.h"
- #include "backlight.h"
- #include "panic.h"
- #include "power.h"
- #include "file.h"
- #include "common.h"
- #include "hwcompat.h"
- #include "usb.h"
- #include "version.h"
- #define XSC(X) #X
- #define SC(X) XSC(X)
- /* Maximum allowed firmware image size. The largest known current
- (December 2006) firmware is about 7.5MB (Apple's firmware for the ipod video)
- so we set this to 8MB. */
- #define MAX_LOADSIZE (8*1024*1024)
- /* A buffer to load the Linux kernel or Rockbox into */
- unsigned char *loadbuffer = (unsigned char *)DRAM_START;
- #if CONFIG_KEYPAD == IPOD_4G_PAD && !defined(IPOD_MINI)
- /* check if number of seconds has past */
- int timer_check(int clock_start, unsigned int usecs)
- {
- if ((USEC_TIMER - clock_start) >= usecs) {
- return 1;
- } else {
- return 0;
- }
- }
- static void ser_opto_keypad_cfg(int val)
- {
- int start_time;
- GPIOB_ENABLE &=~ 0x80;
- outl(inl(0x7000c104) | 0xc000000, 0x7000c104);
- outl(val, 0x7000c120);
- outl(inl(0x7000c100) | 0x80000000, 0x7000c100);
- GPIOB_OUTPUT_VAL &=~ 0x10;
- GPIOB_OUTPUT_EN |= 0x10;
- start_time = USEC_TIMER;
- do {
- if ((inl(0x7000c104) & 0x80000000) == 0) {
- break;
- }
- } while (timer_check(start_time, 1500) != 0);
- outl(inl(0x7000c100) & ~0x80000000, 0x7000c100);
- GPIOB_ENABLE |= 0x80;
- GPIOB_OUTPUT_VAL |= 0x10;
- GPIOB_OUTPUT_EN &=~0x10;
- outl(inl(0x7000c104) | 0xc000000, 0x7000c104);
- outl(inl(0x7000c100) | 0x60000000, 0x7000c100);
- }
- int opto_keypad_read(void)
- {
- int loop_cnt, had_io = 0;
- for (loop_cnt = 5; loop_cnt != 0;)
- {
- int key_pressed = 0;
- int start_time;
- unsigned int key_pad_val;
- ser_opto_keypad_cfg(0x8000023a);
- start_time = USEC_TIMER;
- do {
- if (inl(0x7000c104) & 0x4000000) {
- had_io = 1;
- break;
- }
- if (had_io != 0) {
- break;
- }
- } while (timer_check(start_time, 1500) != 0);
- key_pad_val = inl(0x7000c140);
- if ((key_pad_val & ~0x7fff0000) != 0x8000023a) {
- loop_cnt--;
- } else {
- key_pad_val = (key_pad_val << 11) >> 27;
- key_pressed = 1;
- }
- outl(inl(0x7000c100) | 0x60000000, 0x7000c100);
- outl(inl(0x7000c104) | 0xc000000, 0x7000c104);
- if (key_pressed != 0) {
- return key_pad_val ^ 0x1f;
- }
- }
- return 0;
- }
- #endif
- static int key_pressed(void)
- {
- unsigned char state;
- #if CONFIG_KEYPAD == IPOD_4G_PAD
- #ifdef IPOD_MINI /* mini 1G only */
- state = GPIOA_INPUT_VAL & 0x3f;
- if ((state & 0x10) == 0) return BUTTON_LEFT;
- if ((state & 0x2) == 0) return BUTTON_MENU;
- if ((state & 0x4) == 0) return BUTTON_PLAY;
- if ((state & 0x8) == 0) return BUTTON_RIGHT;
- #else
- state = opto_keypad_read();
- if ((state & 0x4) == 0) return BUTTON_LEFT;
- if ((state & 0x10) == 0) return BUTTON_MENU;
- if ((state & 0x8) == 0) return BUTTON_PLAY;
- if ((state & 0x2) == 0) return BUTTON_RIGHT;
- #endif
- #elif (CONFIG_KEYPAD == IPOD_3G_PAD) || (CONFIG_KEYPAD == IPOD_1G2G_PAD)
- state = GPIOA_INPUT_VAL;
- if ((state & 0x08) == 0) return BUTTON_LEFT;
- if ((state & 0x10) == 0) return BUTTON_MENU;
- if ((state & 0x04) == 0) return BUTTON_PLAY;
- if ((state & 0x01) == 0) return BUTTON_RIGHT;
- #endif
- return 0;
- }
- bool button_hold(void)
- {
- #if CONFIG_KEYPAD == IPOD_1G2G_PAD
- return (GPIOA_INPUT_VAL & 0x20);
- #else
- return !(GPIOA_INPUT_VAL & 0x20);
- #endif
- }
- void fatal_error(void)
- {
- extern int line;
- bool holdstatus=false;
- /* System font is 6 pixels wide */
- #if defined(IPOD_1G2G) || defined(IPOD_3G)
- printf("Insert Firewire cable, or");
- printf("hold MENU+PLAY to reboot");
- printf("then REW+FF for disk mode");
- #elif LCD_WIDTH >= (30*6)
- printf("Insert USB cable, or");
- printf("hold MENU+SELECT to reboot");
- printf("then SELECT+PLAY for disk mode");
- #else
- printf("Insert USB cable, or");
- printf("hold MENU+SELECT to");
- printf("reboot then SELECT+PLAY");
- printf("for disk mode");
- #endif
- lcd_update();
- usb_init();
- while (1) {
- if (button_hold() != holdstatus) {
- if (button_hold()) {
- holdstatus=true;
- lcd_puts(0, line, "Hold switch on!");
- } else {
- holdstatus=false;
- lcd_puts(0, line, " ");
- }
- lcd_update();
- }
- if (usb_detect() == USB_INSERTED) {
- ata_sleepnow(); /* Immediately spindown the disk. */
- sleep(HZ*2);
- #if CONFIG_CPU == PP5020
- memcpy((void *)0x40017f00, "diskmode\0\0hotstuff\0\0\1", 21);
- #elif CONFIG_CPU == PP5022
- memcpy((void *)0x4001ff00, "diskmode\0\0hotstuff\0\0\1", 21);
- #elif CONFIG_CPU == PP5002
- memcpy((void *)0x40017f00, "diskmodehotstuff\1", 17);
- #endif /* CONFIG_CPU */
- system_reboot(); /* Reboot */
- }
- udelay(100000); /* 100ms */
- }
- }
- /* The bootloader is started from the OSOS image on the firmware
- * partition. There are several ways it can be installed there:
- * appended to the Apple firmware, on its own, or appended to
- * Rockbox itself. The Apple ROM loader loads the entire OSOS
- * image to DRAM_START, whatever it contains. If the bootloader
- * is appended to another image then it will've modified the
- * entry point in the OSOS header such that the ROM will call the
- * bootloader rather than the main image.
- *
- * So, once the bootloader has control:
- *
- * 1) If the hold switch is on, or the menu button is being held,
- * try to boot the Apple firmware.
- * 1a) First, it looks for apple_os.ipod on the FAT32 partition,
- * in .rockbox or the root directory. If found it loads that
- * without further checking and runs it.
- * 1b) Next, it checks to see if the OSOS image already loaded
- * into RAM is in fact the Apple firmware with the bootloader
- * appended. It looks at DRAM_START+0x20 for the string
- * "portalplayer", and if it's there, just jumps back to
- * DRAM_START where the entry point was before the bootloader
- * was appended.
- * 1c) If neither of those worked, it displays an error and dies.
- *
- * 2) If the play button is being held, try to boot Linux. It looks
- * for linux.bin in the root directory, and if it's not there,
- * it displays an error and dies.
- *
- * 3) Otherwise, try to boot Rockbox.
- * 3a) First, it looks for rockbox.ipod on the FAT32 partition,
- * in .rockbox or the root directory. If found it loads that
- * without further checking and runs it.
- * 3b) Next, it checks to see if the OSOS image already loaded
- * into RAM is in fact Rockbox with the bootloader appended.
- * It looks at DRAM_START+0x20 for the string "Rockbox\1"
- * (which is inserted there in crt0-pp.S), and if it's there,
- * just humps back to DRAM_START where the entry point was
- * before the bootloader was appended.
- * 3c) If neither of those worked, it displays an error and dies.
- *
- * The result is that any of the three install configurations work,
- * and that images of apple_os.ipod or rockbox.ipod on the FAT32
- * partition take priority over the contents of OSOS (this avoids
- * upgrades failing to work if OSOS is not updated).
- *
- * Loading from OSOS is somewhat faster than loading from FAT32,
- * because the Apple ROM doesn't have to deal with filesystems or
- * fragmentation, and is already loading from OSOS anyway. Thus,
- * the fastest boot configuration that still allows dual booting
- * is to install Rockbox into OSOS with the bootloader appended
- * (and delete/rename rockbox.ipod from the FAT32 partition).
- *
- * It is of course faster to just install Rockbox to OSOS alone,
- * but then it's impossible to boot the Apple firmware.
- */
- void* main(void)
- {
- char buf[256];
- int i;
- int btn;
- int rc;
- bool haveramos;
- bool button_was_held;
- struct partinfo* pinfo;
- unsigned short* identify_info;
- /* Check the button hold status as soon as possible - to
- give the user maximum chance to turn it off in order to
- reset the settings in rockbox. */
- button_was_held = button_hold();
- system_init();
- kernel_init();
- #ifndef HAVE_BACKLIGHT_INVERSION
- backlight_init(); /* Turns on the backlight */
- #endif
- lcd_init();
- font_init();
- #ifdef HAVE_LCD_COLOR
- lcd_set_foreground(LCD_WHITE);
- lcd_set_background(LCD_BLACK);
- lcd_clear_display();
- #endif
- #if 0
- /* ADC and button drivers are not yet implemented */
- adc_init();
- button_init();
- #endif
- btn=key_pressed();
- /* Enable bootloader messages */
- if (btn==BUTTON_RIGHT)
- verbose = true;
- lcd_setfont(FONT_SYSFIXED);
- printf("Rockbox boot loader");
- printf("Version: " RBVERSION);
- printf("IPOD version: 0x%08x", IPOD_HW_REVISION);
- i=ata_init();
- if (i==0) {
- identify_info=ata_get_identify();
- /* Show model */
- for (i=0; i < 20; i++) {
- ((unsigned short*)buf)[i]=htobe16(identify_info[i+27]);
- }
- buf[40]=0;
- for (i=39; i && buf[i]==' '; i--) {
- buf[i]=0;
- }
- printf(buf);
- } else {
- printf("ATA: %d", i);
- }
- disk_init();
- rc = disk_mount_all();
- if (rc<=0)
- {
- printf("No partition found");
- fatal_error();
- }
- pinfo = disk_partinfo(1);
- printf("Partition 1: 0x%02x %ld sectors",
- pinfo->type, pinfo->size);
- if (button_was_held || (btn==BUTTON_MENU)) {
- /* If either the hold switch was on, or the Menu button was held, then
- try the Apple firmware */
- printf("Loading original firmware...");
-
- /* First try an apple_os.ipod file on the FAT32 partition
- (either in .rockbox or the root)
- */
-
- rc=load_firmware(loadbuffer, "apple_os.ipod", MAX_LOADSIZE);
-
- if (rc == EOK) {
- printf("apple_os.ipod loaded.");
- return (void*)DRAM_START;
- } else if (rc == EFILE_NOT_FOUND) {
- /* If apple_os.ipod doesn't exist, then check if there is an Apple
- firmware image in RAM */
- haveramos = (memcmp((void*)(DRAM_START+0x20),"portalplayer",12)==0);
- if (haveramos) {
- /* We have a copy of the retailos in RAM, lets just run it. */
- return (void*)DRAM_START;
- }
- } else if (rc < EFILE_NOT_FOUND) {
- printf("Error!");
- printf("Can't load apple_os.ipod:");
- printf(strerror(rc));
- }
-
- /* Everything failed - just loop forever */
- printf("No RetailOS detected");
-
- } else if (btn==BUTTON_PLAY) {
- printf("Loading Linux...");
- rc=load_raw_firmware(loadbuffer, "/linux.bin", MAX_LOADSIZE);
- if (rc < EOK) {
- printf("Error!");
- printf("Can't load linux.bin:");
- printf(strerror(rc));
- } else {
- return (void*)DRAM_START;
- }
- } else {
- printf("Loading Rockbox...");
- rc=load_firmware(loadbuffer, BOOTFILE, MAX_LOADSIZE);
- if (rc == EOK) {
- printf("Rockbox loaded.");
- return (void*)DRAM_START;
- } else if (rc == EFILE_NOT_FOUND) {
- /* if rockbox.ipod doesn't exist, then check if there is a Rockbox
- image in RAM */
- haveramos = (memcmp((void*)(DRAM_START+0x20),"Rockbox\1",8)==0);
- if (haveramos) {
- /* We have a copy of Rockbox in RAM, lets just run it. */
- return (void*)DRAM_START;
- }
- }
- printf("Error!");
- printf("Can't load " BOOTFILE ": ");
- printf(strerror(rc));
- }
-
- /* If we get to here, then we haven't been able to load any firmware */
- fatal_error();
-
- /* We never get here, but keep gcc happy */
- return (void*)0;
- }