len0rd/rockbox
1
0
Fork 1
mirror of https://github.com/Rockbox/rockbox.git synced 2026-04-12 00:47:49 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

* Commit dual-boot support for Creative ZVx family

Browse source 
* Add mkzenboot: makes it possible to integrate Rockbox bootloader with
   Creative firmwares without the need of distributing binaries
 * Add Tadeusz Pyś to credits, who figured out the minifs file system
 * Fix bootloader


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18352 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Maurus Cuelenaere 2008-08-27 20:32:12 +00:00
parent 109a867742
commit 944c33403c
9 changed files with 1414 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

105
firmware/target/arm/tms320dm320/creative-zvm/ata-creativezvm.c
View file

@ -28,6 +28,8 @@
#include "panic.h"
#include "ata-target.h"
#include "dm320.h"
#include "ata.h"
#include "string.h"
void sleep_ms(int ms)
{
@ -109,3 +111,106 @@ void GIO2(void)
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, &sector);
hdr = (struct main_header*)&sector;
/* 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);
}