Revision 8f06320f245376f78b105a69cdbcc1d181748ea8 authored by alex@thinkpad on 21 April 2016, 06:59:53 UTC, committed by alex@thinkpad on 21 April 2016, 06:59:53 UTC
1 parent f9a813b
bootflags.c
/** \file
* Autoboot flag control
*/
#include "dryos.h"
#include "bmp.h"
/* CF/SD device structure. we have two types which have different parameter order and little differences in behavior */
#if !defined(CONFIG_500D) && !defined(CONFIG_50D) && !defined(CONFIG_5D2) && !defined(CONFIG_40D)
struct cf_device
{
/* type b always reads from raw sectors */
int (*read_block)(
struct cf_device * dev,
void * buf,
uintptr_t block,
size_t num_blocks
);
int (*write_block)(
struct cf_device * dev,
const void * buf,
uintptr_t block,
size_t num_blocks
);
/* is 7D the only one with two null pointers between? */
#if defined(CONFIG_7D)
void *null_1;
void *null_2;
#endif
void * io_control;
void * soft_reset;
};
#else
struct cf_device
{
/* If block has the top bit set the physical blocks will be read instead of from the first partition. Cool. */
int (*read_block)(
struct cf_device * dev,
uintptr_t block,
size_t num_blocks,
void * buf
);
int (*write_block)(
struct cf_device * dev,
uintptr_t block,
size_t num_blocks,
const void * buf
);
void * io_control;
void * soft_reset;
};
#endif
/** Shadow copy of the NVRAM boot flags stored at 0xF8000000 */
#define NVRAM_BOOTFLAGS ((void*) 0xF8000000)
struct boot_flags
{
uint32_t firmware; // 0x00
uint32_t bootdisk; // 0x04
uint32_t ram_exe; // 0x08
uint32_t update; // 0x0c
uint32_t flag_0x10;
uint32_t flag_0x14;
uint32_t flag_0x18;
uint32_t flag_0x1c;
};
static struct boot_flags * const boot_flags = NVRAM_BOOTFLAGS;;
extern struct cf_device * const cf_device[];
extern struct cf_device * const sd_device[];
struct partition_table
{
uint8_t state; // 0x80 = bootable
uint8_t start_head;
uint16_t start_cylinder_sector;
uint8_t type;
uint8_t end_head;
uint16_t end_cylinder_sector;
uint32_t sectors_before_partition;
uint32_t sectors_in_partition;
}__attribute__((aligned,packed));
/*
* recompute a exFAT VBR checksum in sector 12
*/
static uint32_t VBRChecksum( unsigned char octets[], int NumberOfBytes) {
uint32_t Checksum = 0;
int Index;
for (Index = 0; Index < NumberOfBytes; Index++) {
if (Index != 106 && Index != 107 && Index != 112) // skip 'volume flags' and 'percent in use'
Checksum = ((Checksum <<31) | (Checksum>> 1)) + (uint32_t) octets[Index];
}
return Checksum;
}
static void exfat_sum(uint32_t* buffer) // size: 12 sectors (0-11)
{
int i=0;
uint32_t sum;
sum = VBRChecksum((unsigned char*)buffer, (512*11));
//~ NotifyBox(2000, "before: %x %x\nafter: %x ", buffer[(512*11)/4], buffer[(512*11)/4 + 1], sum); msleep(2000);
// fill sector 11 with the checksum, repeated
for(i=0; i<512; i+=4)
buffer[(512*11+i)/4] = sum;
}
// http://www.datarescue.com/laboratory/partition.htm
// http://magiclantern.wikia.com/wiki/Bootdisk
#if !defined(CONFIG_500D) && !defined(CONFIG_50D) && !defined(CONFIG_5D2) && !defined(CONFIG_40D)
int
bootflag_write_bootblock( void )
{
#if defined(CONFIG_7D)
struct cf_device * const dev = (struct cf_device *) cf_device[6];
#elif defined(CONFIG_5D3)
/* dual card slot */
int ml_on_cf = (get_ml_card()->drive_letter[0] == 'A');
extern struct cf_device ** cf_device_ptr[];
struct cf_device * const dev = (struct cf_device *) (ml_on_cf ? cf_device_ptr[0][4] : sd_device[1]);
#else
struct cf_device * const dev = (struct cf_device *) sd_device[1];
#endif
if (!dev)
{
return 0;
}
uint8_t *block = fio_malloc( 512 );
int i;
for(i=0 ; i<0x200 ; i++) block[i] = 0xAA;
dev->read_block( dev, block, 0, 1 );
struct partition_table p;
extern void fsuDecodePartitionTable(void* partition_address_on_card, struct partition_table * ptable);
fsuDecodePartitionTable(block + 446, &p);
//~ NotifyBox(1000, "decoded => %x,%x,%x", p.type, p.sectors_before_partition, p.sectors_in_partition);
if (p.type == 6 || p.type == 0xb || p.type == 0xc) // FAT16 or FAT32
{
int rc = dev->read_block( dev, block, p.sectors_before_partition, 1 );
int off1 = p.type == 6 ? 0x2b : 0x47;
int off2 = p.type == 6 ? 0x40 : 0x5c;
memcpy( block + off1, (uint8_t*) "EOS_DEVELOP", 0xB );
memcpy( block + off2, (uint8_t*) "BOOTDISK", 0x8 );
//~ NotifyBox(1000, "writing");
rc = dev->write_block( dev, block, p.sectors_before_partition, 1 );
if (rc != 1)
{
NotifyBox(2000, "Bootflag write failed\np.type=%d, p.sec = %d, rc=%d", p.type, p.sectors_before_partition, rc);
msleep(2000);
return 0;
}
}
else if (p.type == 7) // ExFAT
{
uint8_t* buffer = fio_malloc(512*24);
dev->read_block( dev, buffer, p.sectors_before_partition, 24 );
int off1 = 130;
int off2 = 122;
memcpy( buffer + off1, (uint8_t*) "EOS_DEVELOP", 0xB );
memcpy( buffer + off2, (uint8_t*) "BOOTDISK", 0x8 );
memcpy( buffer + 512*12 + off1, (uint8_t*) "EOS_DEVELOP", 0xB );
memcpy( buffer + 512*12 + off2, (uint8_t*) "BOOTDISK", 0x8 );
exfat_sum((uint32_t*)(buffer));
exfat_sum((uint32_t*)(buffer+512*12));
dev->write_block( dev, buffer, p.sectors_before_partition, 24 );
fio_free( buffer );
}
else
{
fio_free( block );
NotifyBox(2000, "Unknown partition: %d", p.type); msleep(2000);
return 0;
}
fio_free( block );
return 1; // success!
}
#else
// 500D doesn't use partition table like the 550d and other cameras.
// This method is a mix of Trammell's old code and a lot of testing / verifying by me.
// -Coutts
int
bootflag_write_bootblock( void )
{
#ifdef CONFIG_500D
struct cf_device * const dev = sd_device[1];
#elif defined(CONFIG_50D) || defined(CONFIG_5D2) || defined(CONFIG_40D) // not good for 40D, need checking
struct cf_device * const dev = cf_device[5];
#endif
uint8_t *block = fio_malloc( 512 );
int i;
for(i=0; i<512; i++) block[i] = 0xAA;
dev->read_block( dev, 0, 1, block ); //overwrite our AAAs in our buffer with the MBR partition of the SD card.
// figure out if we are a FAT32 partitioned drive. this spells out FAT32 in chars.
// FAT16 not supported yet - I don't have a small enough card to test with.
//if( block[0x52] == 0x46 && block[0x53] == 0x41 && block[0x54] == 0x54 && block[0x55] == 0x33 && block[0x56] == 0x32 )
if( strncmp((const char*) block + 0x52, "FAT32", 5) == 0 ) //check if this card is FAT32
{
dev->read_block( dev, 0, 1, block );
memcpy( block + 0x47, (uint8_t*) "EOS_DEVELOP", 0xB );
memcpy( block + 0x5C, (uint8_t*) "BOOTDISK", 0xB );
dev->write_block( dev, 0, 1, block );
}
else if( strncmp((const char*) block + 0x36, "FAT16", 5) == 0 ) //check if this card is FAT16
{
dev->read_block( dev, 0, 1, block );
memcpy( block + 0x2B, (uint8_t*) "EOS_DEVELOP", 0xB );
memcpy( block + 0x40, (uint8_t*) "BOOTDISK", 0xB );
dev->write_block( dev, 0, 1, block );
}
else if( strncmp((const char*) block + 0x3, "EXFAT", 5) == 0 ) //check if this card is EXFAT
{
uint8_t* buffer = fio_malloc(512*24);
dev->read_block( dev, 0, 24, buffer );
int off1 = 130;
int off2 = 122;
memcpy( buffer + off1, (uint8_t*) "EOS_DEVELOP", 0xB );
memcpy( buffer + off2, (uint8_t*) "BOOTDISK", 0x8 );
memcpy( buffer + 512*12 + off1, (uint8_t*) "EOS_DEVELOP", 0xB );
memcpy( buffer + 512*12 + off2, (uint8_t*) "BOOTDISK", 0x8 );
exfat_sum((uint32_t*)(buffer));
exfat_sum((uint32_t*)(buffer+512*12));
dev->write_block( dev, 0, 24, buffer );
fio_free( buffer );
}
else // if it's not FAT16 neither FAT32, don't do anything.
{
NotifyBox(2000, "Unknown partition :("); msleep(2000);
return 0;
}
fio_free( block );
return 1;
}
#endif
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