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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Maurus Cuelenaere
*
* 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 "cpu.h"
#include "kernel.h"
#include "thread.h"
#include "system.h"
#include "power.h"
#include "panic.h"
#include "ata-target.h"
#include "dm320.h"
#include "ata.h"
#include "string.h"
void sleep_ms(int ms)
{
sleep(ms*HZ/1000);
}
void ide_power_enable(bool on)
{
/* Disabled until figured out what's wrong */
#if 0
int old_level = disable_irq_save();
if(on)
{
IO_GIO_BITSET0 = (1 << 14);
ata_reset();
}
else
IO_GIO_BITCLR0 = (1 << 14);
restore_irq(old_level);
#else
(void)on;
#endif
}
inline bool ide_powered()
{
#if 0
return (IO_GIO_BITSET0 & (1 << 14));
#else
return true;
#endif
}
void ata_reset(void)
{
int old_level = disable_irq_save();
if(!ide_powered())
{
ide_power_enable(true);
sleep_ms(150);
}
else
{
IO_GIO_BITSET0 = (1 << 5);
IO_GIO_BITCLR0 = (1 << 3);
sleep_ms(1);
}
IO_GIO_BITCLR0 = (1 << 5);
sleep_ms(10);
IO_GIO_BITSET0 = (1 << 3);
while(!(ATA_COMMAND & STATUS_RDY))
sleep_ms(10);
restore_irq(old_level);
}
void ata_enable(bool on)
{
(void)on;
return;
}
bool ata_is_coldstart(void)
{
return true;
}
void ata_device_init(void)
{
IO_INTC_EINT1 |= INTR_EINT1_EXT2; /* enable GIO2 interrupt */
//TODO: mimic OF inits...
return;
}
void GIO2(void)
{
#ifdef DEBUG
logf("GIO2 interrupt...");
#endif
IO_INTC_IRQ1 = INTR_IRQ1_EXT2; /* Mask GIO2 interrupt */
return;
}
/*
---------------------------------------------------------------------------
Creative File Systems parsing code
---------------------------------------------------------------------------
*/
struct main_header
{
char mblk[4];
unsigned char sector_size[4];
unsigned char disk_size[8];
struct partition_header
{
unsigned char end[4];
unsigned char start[4];
char name[8];
} partitions[31];
};
struct minifs_file
{
char name[0x10];
unsigned char unk[4];
unsigned char size[4];
unsigned char chain1[4];
unsigned char chain2[4];
};
struct minifs_chain
{
unsigned char unknown[4];
unsigned char chain[2*0x27FE];
unsigned char unknown2[4];
unsigned char length[4];
};
#define DIR_BITMAP_START 0x0143
#define DIR_START 0x0144
#define DATASPACE_BITMAP_START 0x0145
#define DATASPACE_START 0x0146
#define CLUSTER_CHAIN_SIZE 0x5008
#define CLUSTER_CHAIN_HEAD 0x0000
#define CLUSTER_CHAIN_BITMAP 0x0001
#define CLUSTER_CHAIN_CHAIN 0x0002
static unsigned short le2int16(unsigned char* buf)
{
return (buf[1] << 8) | buf[0];
}
static unsigned int le2int32(unsigned char* buf)
{
return (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
}
int load_minifs_file(char* filename, unsigned char* location)
{
struct main_header *hdr;
static struct minifs_file files[128];
struct minifs_chain *chain;
unsigned int i;
int found = -1;
unsigned char sector[512];
static unsigned char chain_data[42*512]; /* stack overflow if not static */
/* Reading MBLK */
ata_read_sectors(0, 1, §or);
hdr = (struct main_header*)§or;
/* Reading directory listing */
#define CLUSTER2SECTOR(x) ( (le2int32(hdr->partitions[0].start) + (x)*8) )
ata_read_sectors(CLUSTER2SECTOR(DIR_START), 8, &files);
for(i=0; i<127; i++)
{
if(strcmp(files[i].name, filename) == 0)
found = i;
}
if(found == -1)
return -1;
#define GET_CHAIN(x) ( CLUSTER2SECTOR(CLUSTER_CHAIN_CHAIN)*512 + (x)*CLUSTER_CHAIN_SIZE )
#define FILE2SECTOR(x) ( CLUSTER2SECTOR(DATASPACE_START + (x)) )
/* Reading chain list */
ata_read_sectors(GET_CHAIN(le2int32(files[found].chain1))/512, 41, &chain_data[0]);
chain = (struct minifs_chain*)&chain_data[GET_CHAIN(le2int32(files[found].chain1))%512];
/* Copying data */
for(i=0; i<le2int32(chain->length); i++)
{
ata_read_sectors(FILE2SECTOR(le2int16(&chain->chain[i*2])), 8, location);
location += 0x1000;
}
return le2int32(files[found].size);
}
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