cb7e695ef9
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8301 a1c6a512-1295-4272-9138-f99709370657
489 lines
11 KiB
C
489 lines
11 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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* $Id$
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*
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* Copyright (C) 2005 by Dave Chapman
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*
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* Based on Rockbox iriver bootloader by Linus Nielsen Feltzing
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* and the ipodlinux bootloader by Daniel Palffy and Bernard Leach
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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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 "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "cpu.h"
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#include "system.h"
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#include "lcd.h"
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#include "kernel.h"
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#include "thread.h"
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#include "ata.h"
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#include "fat.h"
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#include "disk.h"
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#include "font.h"
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#include "adc.h"
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#include "backlight.h"
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#include "panic.h"
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#include "power.h"
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#include "file.h"
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#define DRAM_START 0x10000000
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#define IPOD_PP5020_RTC 0x60005010
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#define IPOD_HW_REVISION (*((volatile unsigned long*)(0x00002084)))
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#define BUTTON_LEFT 1
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#define BUTTON_MENU 2
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#define BUTTON_RIGHT 3
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#define BUTTON_PLAY 4
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/* Size of the buffer to store the loaded Rockbox/Linux image */
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#define MAX_LOADSIZE (4*1024*1024)
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char version[] = APPSVERSION;
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#include "rockbox-16bit.h"
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#include "ipodlinux-16bit.h"
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typedef struct _image {
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unsigned type; /* '' */
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unsigned id; /* */
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unsigned pad1; /* 0000 0000 */
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unsigned devOffset; /* byte offset of start of image code */
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unsigned len; /* length in bytes of image */
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void *addr; /* load address */
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unsigned entryOffset; /* execution start within image */
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unsigned chksum; /* checksum for image */
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unsigned vers; /* image version */
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unsigned loadAddr; /* load address for image */
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} image_t;
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extern image_t boot_table[];
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int line=0;
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static void memmove16(void *dest, const void *src, unsigned count)
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{
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struct bufstr {
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unsigned _buf[4];
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} *d, *s;
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if (src >= dest) {
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count = (count + 15) >> 4;
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d = (struct bufstr *) dest;
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s = (struct bufstr *) src;
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while (count--)
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*d++ = *s++;
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} else {
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count = (count + 15) >> 4;
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d = (struct bufstr *)(dest + (count <<4));
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s = (struct bufstr *)(src + (count <<4));
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while (count--)
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*--d = *--s;
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}
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}
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/* get current usec counter */
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int timer_get_current(void)
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{
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return inl(IPOD_PP5020_RTC);
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}
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/* check if number of seconds has past */
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int timer_check(int clock_start, unsigned int usecs)
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{
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if ((inl(IPOD_PP5020_RTC) - clock_start) >= usecs) {
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return 1;
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} else {
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return 0;
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}
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}
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/* This isn't a sleep, but let's call it that. */
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int usleep(unsigned int usecs)
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{
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unsigned int start = inl(IPOD_PP5020_RTC);
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while ((inl(IPOD_PP5020_RTC) - start) < usecs) {
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// empty
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}
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return 0;
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}
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static void ser_opto_keypad_cfg(int val)
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{
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int start_time;
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outl(inl(0x6000d004) & ~0x80, 0x6000d004);
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outl(inl(0x7000c104) | 0xc000000, 0x7000c104);
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outl(val, 0x7000c120);
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outl(inl(0x7000c100) | 0x80000000, 0x7000c100);
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outl(inl(0x6000d024) & ~0x10, 0x6000d024);
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outl(inl(0x6000d014) | 0x10, 0x6000d014);
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start_time = timer_get_current();
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do {
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if ((inl(0x7000c104) & 0x80000000) == 0) {
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break;
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}
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} while (timer_check(start_time, 1500) != 0);
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outl(inl(0x7000c100) & ~0x80000000, 0x7000c100);
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outl(inl(0x6000d004) | 0x80, 0x6000d004);
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outl(inl(0x6000d024) | 0x10, 0x6000d024);
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outl(inl(0x6000d014) & ~0x10, 0x6000d014);
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outl(inl(0x7000c104) | 0xc000000, 0x7000c104);
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outl(inl(0x7000c100) | 0x60000000, 0x7000c100);
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}
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int opto_keypad_read(void)
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{
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int loop_cnt, had_io = 0;
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for (loop_cnt = 5; loop_cnt != 0;)
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{
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int key_pressed = 0;
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int start_time;
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unsigned int key_pad_val;
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ser_opto_keypad_cfg(0x8000023a);
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start_time = timer_get_current();
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do {
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if (inl(0x7000c104) & 0x4000000) {
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had_io = 1;
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break;
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}
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if (had_io != 0) {
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break;
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}
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} while (timer_check(start_time, 1500) != 0);
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key_pad_val = inl(0x7000c140);
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if ((key_pad_val & ~0x7fff0000) != 0x8000023a) {
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loop_cnt--;
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} else {
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key_pad_val = (key_pad_val << 11) >> 27;
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key_pressed = 1;
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}
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outl(inl(0x7000c100) | 0x60000000, 0x7000c100);
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outl(inl(0x7000c104) | 0xc000000, 0x7000c104);
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if (key_pressed != 0) {
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return key_pad_val ^ 0x1f;
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}
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}
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return 0;
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}
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static int key_pressed(void)
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{
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unsigned char state;
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state = opto_keypad_read();
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if ((state & 0x4) == 0) return BUTTON_LEFT;
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if ((state & 0x10) == 0) return BUTTON_MENU;
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if ((state & 0x8) == 0) return BUTTON_PLAY;
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if ((state & 0x2) == 0) return BUTTON_RIGHT;
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return 0;
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}
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int load_rockbox(unsigned char* buf)
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{
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int fd;
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int rc;
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int len;
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unsigned long chksum;
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char model[5];
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unsigned long sum;
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int i;
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char str[80];
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fd = open("/.rockbox/" BOOTFILE, O_RDONLY);
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if(fd < 0)
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{
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fd = open("/" BOOTFILE, O_RDONLY);
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if(fd < 0)
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return -1;
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}
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len = filesize(fd) - 8;
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if (len > MAX_LOADSIZE)
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return -6;
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lseek(fd, FIRMWARE_OFFSET_FILE_CRC, SEEK_SET);
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rc = read(fd, &chksum, 4);
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chksum=betoh32(chksum); /* Rockbox checksums are big-endian */
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if(rc < 4)
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return -2;
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rc = read(fd, model, 4);
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if(rc < 4)
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return -3;
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model[4] = 0;
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snprintf(str, 80, "Model: %s, Checksum: %x", model, chksum);
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lcd_puts(0, line++, str);
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lcd_update();
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lseek(fd, FIRMWARE_OFFSET_FILE_DATA, SEEK_SET);
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rc = read(fd, buf, len);
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if(rc < len)
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return -4;
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close(fd);
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sum = MODEL_NUMBER;
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for(i = 0;i < len;i++) {
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sum += buf[i];
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}
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snprintf(str, 80, "Sum: %x", sum);
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lcd_puts(0, line++, str);
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lcd_update();
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if(sum != chksum)
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return -5;
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return len;
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}
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int load_linux(unsigned char* buf) {
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int fd;
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int rc;
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int len;
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char str[80];
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fd=open("/linux.bin",O_RDONLY);
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if (fd < 0)
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return -1;
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len=filesize(fd);
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if (len > MAX_LOADSIZE)
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return -6;
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rc=read(fd,buf,len);
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if (rc < len)
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return -4;
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snprintf(str, 80, "Loaded Linux: %d bytes", len);
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lcd_puts(0, line++, str);
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lcd_update();
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return len;
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}
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/* A buffer to load the Linux kernel or Rockbox into */
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unsigned char loadbuffer[MAX_LOADSIZE];
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void* main(void)
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{
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char buf[256];
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int imageno=0;
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int i;
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int rc;
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int padding = 0x4400;
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image_t *tblp = boot_table;
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void* entry;
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struct partinfo* pinfo;
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unsigned short* identify_info;
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/* Turn on the backlight */
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#if CONFIG_BACKLIGHT==BL_IPOD4G
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/* brightness full */
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outl(0x80000000 | (0xff << 16), 0x7000a010);
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/* set port B03 on */
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outl(((0x100 | 1) << 3), 0x6000d824);
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#elif CONFIG_BACKLIGHT==BL_IPODNANO
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/* set port B03 on */
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outl(((0x100 | 1) << 3), 0x6000d824);
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/* set port L07 on */
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outl(((0x100 | 1) << 7), 0x6000d12c);
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#endif
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system_init();
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kernel_init();
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lcd_init();
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font_init();
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#if 0
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/* ADC and button drivers are not yet implemented */
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adc_init();
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button_init();
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#endif
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/* Notes: iPod Color/Photo LCD is 220x176, Nano is 176x138 */
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/* Display the 42x47 pixel iPodLinux logo */
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lcd_bitmap(ipllogo, 20,6, 42,47);
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/* Display the 100x31 pixel Rockbox logo */
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lcd_bitmap(rockboxlogo, 74,16, 100,31);
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line=7;
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lcd_setfont(FONT_SYSFIXED);
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lcd_puts(0, line++, "iPodLinux/Rockbox boot loader");
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snprintf(buf, sizeof(buf), "Version: 20%s", version);
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lcd_puts(0, line++, buf);
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snprintf(buf, sizeof(buf), "IPOD version: 0x%08x", IPOD_HW_REVISION);
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lcd_puts(0, line++, buf);
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lcd_update();
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i=ata_init();
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if (i==0) {
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identify_info=ata_get_identify();
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/* Show model */
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for (i=0; i < 20; i++) {
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((unsigned short*)buf)[i]=htobe16(identify_info[i+27]);
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}
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buf[40]=0;
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for (i=39; i && buf[i]==' '; i--) {
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buf[i]=0;
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}
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lcd_puts(0, line++, buf);
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lcd_update();
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} else {
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snprintf(buf, sizeof(buf), "ATA: %d", i);
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lcd_puts(0, line++, buf);
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lcd_update();
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}
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disk_init();
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rc = disk_mount_all();
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if (rc<=0)
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{
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lcd_puts(0, line++, "No partition found");
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lcd_update();
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// while(button_get(true) != SYS_USB_CONNECTED) {};
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}
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pinfo = disk_partinfo(1);
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snprintf(buf, sizeof(buf), "Partition 1: 0x%02x %ld MB",
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pinfo->type, pinfo->size / 2048);
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lcd_puts(0, line++, buf);
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lcd_update();
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/* Check for a keypress */
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i=key_pressed();
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if ((i!=BUTTON_MENU) && (i!=BUTTON_PLAY)) {
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lcd_puts(0, line, "Loading Rockbox...");
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lcd_update();
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rc=load_rockbox(loadbuffer);
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if (rc < 0) {
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snprintf(buf, sizeof(buf), "Rockbox error: %d",rc);
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lcd_puts(0, line++, buf);
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lcd_update();
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} else {
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lcd_puts(0, line++, "Rockbox loaded.");
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lcd_update();
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memcpy((void*)DRAM_START,loadbuffer,rc);
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/* Transfer execution directly to Rockbox - we don't want
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to run the rest of the bootloader startup code. */
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asm volatile(
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"mov r0, #0x10000000 \n"
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"mov pc, r0 \n"
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);
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/* We don't get here, but keep the compiler happy. */
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return (void*)0;
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}
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}
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if (i==BUTTON_PLAY) {
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lcd_puts(0, line, "Loading Linux...");
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lcd_update();
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rc=load_linux(loadbuffer);
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if (rc < 0) {
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snprintf(buf, sizeof(buf), "Linux error: %d",rc);
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lcd_puts(0, line++, buf);
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lcd_update();
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} else {
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memcpy((void*)DRAM_START,loadbuffer,rc);
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return (void*)DRAM_START;
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}
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}
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/* If everything else failed, try the original firmware */
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lcd_puts(0, line, "Loading original firmware...");
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lcd_update();
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/* Pause for 5 seconds so we can see what's happened */
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// usleep(5000000);
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entry = tblp->addr + tblp->entryOffset;
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if (imageno || ((int)tblp->addr & 0xffffff) != 0) {
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memmove16(tblp->addr, tblp->addr + tblp->devOffset - padding,
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tblp->len);
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}
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/* Return the start address in loaded image */
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return entry;
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}
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/* These functions are present in the firmware library, but we reimplement
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them here because the originals do a lot more than we want */
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void reset_poweroff_timer(void)
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{
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}
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int dbg_ports(void)
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{
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return 0;
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}
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void mpeg_stop(void)
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{
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}
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void usb_acknowledge(void)
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{
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}
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void usb_wait_for_disconnect(void)
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{
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}
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void sys_poweroff(void)
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{
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}
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