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rockbox/bootloader/ipod.c
Dave Chapman f5aebf7848 Fixes for new 16-bit framebuffer type 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7883 a1c6a512-1295-4272-9138-f99709370657
2005-11-14 21:54:23 +00:00

479 lines
11 KiB
C
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/***************************************************************************
* __________ __ ___.
* 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
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* 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 "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"
#define DRAM_START 0x10000000
#define IPOD_PP5020_RTC 0x60005010
#define IPOD_HW_REVISION (*((volatile unsigned long*)(0x00002084)))
#define BUTTON_LEFT 1
#define BUTTON_MENU 2
#define BUTTON_RIGHT 3
#define BUTTON_PLAY 4
/* Size of the buffer to store the loaded Rockbox/Linux image */
#define MAX_LOADSIZE (4*1024*1024)
char version[] = APPSVERSION;
#include "rockbox-16bit.h"
#include "ipodlinux-16bit.h"
typedef struct _image {
unsigned type; /* '' */
unsigned id; /* */
unsigned pad1; /* 0000 0000 */
unsigned devOffset; /* byte offset of start of image code */
unsigned len; /* length in bytes of image */
void *addr; /* load address */
unsigned entryOffset; /* execution start within image */
unsigned chksum; /* checksum for image */
unsigned vers; /* image version */
unsigned loadAddr; /* load address for image */
} image_t;
extern image_t boot_table[];
int line=0;
static void memmove16(void *dest, const void *src, unsigned count)
{
struct bufstr {
unsigned _buf[4];
} *d, *s;
if (src >= dest) {
count = (count + 15) >> 4;
d = (struct bufstr *) dest;
s = (struct bufstr *) src;
while (count--)
*d++ = *s++;
} else {
count = (count + 15) >> 4;
d = (struct bufstr *)(dest + (count <<4));
s = (struct bufstr *)(src + (count <<4));
while (count--)
*--d = *--s;
}
}
/* get current usec counter */
int timer_get_current(void)
{
return inl(IPOD_PP5020_RTC);
}
/* check if number of seconds has past */
int timer_check(int clock_start, unsigned int usecs)
{
if ((inl(IPOD_PP5020_RTC) - clock_start) >= usecs) {
return 1;
} else {
return 0;
}
}
/* This isn't a sleep, but let's call it that. */
int usleep(unsigned int usecs)
{
unsigned int start = inl(IPOD_PP5020_RTC);
while ((inl(IPOD_PP5020_RTC) - start) < usecs) {
// empty
}
return 0;
}
static void ser_opto_keypad_cfg(int val)
{
int start_time;
outl(inl(0x6000d004) & ~0x80, 0x6000d004);
outl(inl(0x7000c104) | 0xc000000, 0x7000c104);
outl(val, 0x7000c120);
outl(inl(0x7000c100) | 0x80000000, 0x7000c100);
outl(inl(0x6000d024) & ~0x10, 0x6000d024);
outl(inl(0x6000d014) | 0x10, 0x6000d014);
start_time = timer_get_current();
do {
if ((inl(0x7000c104) & 0x80000000) == 0) {
break;
}
} while (timer_check(start_time, 1500) != 0);
outl(inl(0x7000c100) & ~0x80000000, 0x7000c100);
outl(inl(0x6000d004) | 0x80, 0x6000d004);
outl(inl(0x6000d024) | 0x10, 0x6000d024);
outl(inl(0x6000d014) & ~0x10, 0x6000d014);
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 = timer_get_current();
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;
}
static int key_pressed(void)
{
unsigned char state;
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;
return 0;
}
int load_rockbox(unsigned char* buf)
{
int fd;
int rc;
int len;
unsigned long chksum;
char model[5];
unsigned long sum;
int i;
char str[80];
fd = open("/rockbox.ipod", O_RDONLY);
if(fd < 0)
return -1;
len = filesize(fd) - 8;
if (len > MAX_LOADSIZE)
return -6;
lseek(fd, FIRMWARE_OFFSET_FILE_CRC, SEEK_SET);
rc = read(fd, &chksum, 4);
chksum=betoh32(chksum); /* Rockbox checksums are big-endian */
if(rc < 4)
return -2;
rc = read(fd, model, 4);
if(rc < 4)
return -3;
model[4] = 0;
snprintf(str, 80, "Model: %s, Checksum: %x", model, chksum);
lcd_puts(0, line++, str);
lcd_update();
lseek(fd, FIRMWARE_OFFSET_FILE_DATA, SEEK_SET);
rc = read(fd, buf, len);
if(rc < len)
return -4;
close(fd);
sum = MODEL_NUMBER;
for(i = 0;i < len;i++) {
sum += buf[i];
}
snprintf(str, 80, "Sum: %x", sum);
lcd_puts(0, line++, str);
lcd_update();
if(sum != chksum)
return -5;
return len;
}
int load_linux(unsigned char* buf) {
int fd;
int rc;
int len;
char str[80];
fd=open("/linux.bin",O_RDONLY);
if (fd < 0)
return -1;
len=filesize(fd);
if (len > MAX_LOADSIZE)
return -6;
rc=read(fd,buf,len);
if (rc < len)
return -4;
snprintf(str, 80, "Loaded Linux: %d bytes", len);
lcd_puts(0, line++, str);
lcd_update();
return len;
}
/* A buffer to load the Linux kernel or Rockbox into */
unsigned char loadbuffer[MAX_LOADSIZE];
void* main(void)
{
char buf[256];
int imageno=0;
int i;
int rc;
int padding = 0x4400;
image_t *tblp = boot_table;
void* entry;
struct partinfo* pinfo;
unsigned short* identify_info;
/* Turn on the backlight */
#if CONFIG_BACKLIGHT==BL_IPOD4G
/* brightness full */
outl(0x80000000 | (0xff << 16), 0x7000a010);
/* set port B03 on */
outl(((0x100 | 1) << 3), 0x6000d824);
#elif CONFIG_BACKLIGHT==BL_IPODNANO
/* set port B03 on */
outl(((0x100 | 1) << 3), 0x6000d824);
/* set port L07 on */
outl(((0x100 | 1) << 7), 0x6000d12c);
#endif
system_init();
kernel_init();
lcd_init();
font_init();
#if 0
/* ADC and button drivers are not yet implemented */
adc_init();
button_init();
#endif
/* Notes: iPod Color/Photo LCD is 220x176, Nano is 176x138 */
/* Display the 42x47 pixel iPodLinux logo */
lcd_bitmap(ipllogo, 20,6, 42,47);
/* Display the 100x31 pixel Rockbox logo */
lcd_bitmap(rockboxlogo, 74,16, 100,31);
line=7;
lcd_setfont(FONT_SYSFIXED);
lcd_puts(0, line++, "iPodLinux/Rockbox boot loader");
snprintf(buf, sizeof(buf), "Version: 20%s", version);
lcd_puts(0, line++, buf);
snprintf(buf, sizeof(buf), "IPOD version: 0x%08x", IPOD_HW_REVISION);
lcd_puts(0, line++, buf);
lcd_update();
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;
}
lcd_puts(0, line++, buf);
lcd_update();
} else {
snprintf(buf, sizeof(buf), "ATA: %d", i);
lcd_puts(0, line++, buf);
lcd_update();
}
disk_init();
rc = disk_mount_all();
if (rc<=0)
{
lcd_puts(0, line++, "No partition found");
lcd_update();
// while(button_get(true) != SYS_USB_CONNECTED) {};
}
pinfo = disk_partinfo(1);
snprintf(buf, sizeof(buf), "Partition 1: 0x%02x %ld MB",
pinfo->type, pinfo->size / 2048);
lcd_puts(0, line++, buf);
lcd_update();
/* Check for a keypress */
i=key_pressed();
if (i==BUTTON_MENU) {
lcd_puts(0, line, "Loading Rockbox...");
lcd_update();
rc=load_rockbox(loadbuffer);
if (rc < 0) {
snprintf(buf, sizeof(buf), "Rockbox error: %d",rc);
lcd_puts(0, line++, buf);
lcd_update();
} else {
lcd_puts(0, line++, "Rockbox loaded.");
lcd_update();
#if 0
/* Rockbox is not yet runable, so we disable this */
memcpy((void*)DRAM_START,loadbuffer,rc);
return (void*)DRAM_START;
#endif
}
}
if (i==BUTTON_PLAY) {
lcd_puts(0, line, "Loading Linux...");
lcd_update();
rc=load_linux(loadbuffer);
if (rc < 0) {
snprintf(buf, sizeof(buf), "Linux error: %d",rc);
lcd_puts(0, line++, buf);
lcd_update();
} else {
memcpy((void*)DRAM_START,loadbuffer,rc);
return (void*)DRAM_START;
}
}
/* If everything else failed, try the original firmware */
lcd_puts(0, line, "Loading original firmware...");
lcd_update();
/* Pause for 5 seconds so we can see what's happened */
usleep(5000000);
entry = tblp->addr + tblp->entryOffset;
if (imageno || ((int)tblp->addr & 0xffffff) != 0) {
memmove16(tblp->addr, tblp->addr + tblp->devOffset - padding,
tblp->len);
}
/* Return the start address in loaded image */
return entry;
}
/* These functions are present in the firmware library, but we reimplement
them here because the originals do a lot more than we want */
void reset_poweroff_timer(void)
{
}
int dbg_ports(void)
{
return 0;
}
void mpeg_stop(void)
{
}
void usb_acknowledge(void)
{
}
void usb_wait_for_disconnect(void)
{
}
void sys_poweroff(void)
{
}
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