Flashrom

Driver for the Dreamcast's Internal Flash Storage. More...

Modules
	Connection Methods
	Connection method types stored within flashrom.
	Error Values
	Error values for the flashrom_get_block() function.
	ISP Config Fields
	Valid field constants for the flashrom_ispcfg_t struct.
	ISP Config Flags
	Flags for the flashrom_ispcfg_t struct.
	Language Settings
	Language settings possible in the BIOS menu.
	Logical Blocks
	Logical blocks available in the flashrom.
	Partitions
	Partitions available within the flashrom.
	Region Settings
	Region settings possible in the system.

Data Structures
struct	flashrom_syscfg_t
	System configuration structure. More...
struct	flashrom_ispcfg_t
	ISP configuration structure. More...

Functions
int	flashrom_info (int part, int *start_out, int *size_out)
	Retrieve information about the given partition.
int	flashrom_read (int offset, void *buffer_out, int bytes)
	Read data from the flashrom.
int	flashrom_write (int offset, void *buffer, int bytes)
	Write data to the flashrom.
int	flashrom_delete (int offset)
	Delete data from the flashrom.
int	flashrom_get_block (int partid, int blockid, uint8 *buffer_out)
	Get a logical block from the specified partition.
int	flashrom_get_syscfg (flashrom_syscfg_t *out)
	Retrieve the current system configuration settings.
int	flashrom_get_region (void)
	Retrieve the console's region code.
int	flashrom_get_ispcfg (flashrom_ispcfg_t *out)
	Retrieve DreamPassport's ISP configuration.
int	flashrom_get_pw_ispcfg (flashrom_ispcfg_t *out)
	Retrieve PlanetWeb's ISP configuration.

Detailed Description

Driver for the Dreamcast's Internal Flash Storage.

Function Documentation

flashrom_delete()

int flashrom_delete

(

int

offset

)

Delete data from the flashrom.

This function implements the FLASHROM_DELETE syscall; given a partition offset, that entire partition of the flashrom will be deleted and all data will be reset to 0xFF bytes.

Note

This does not rewrite the magic block to the start of the partition. It is your responsibility to do this after running this function.

Parameters

offset

The offset of the start of the partition to erase.

Return values

0	On success.
-1	On error.

flashrom_get_block()

int flashrom_get_block	(	int	partid,
		int	blockid,
		uint8 *	buffer_out
	)

Get a logical block from the specified partition.

This function retrieves the specified block ID from the given partition. The newest version of the data is returned.

Parameters

partid	The partition ID to look in.
blockid	The logical block ID to look for.
buffer_out	Space to store the data. Must be at least 60 bytes.

Returns

0 on success, <0 on error.

See also

Error Values

flashrom_get_ispcfg()

int flashrom_get_ispcfg

(

flashrom_ispcfg_t *

out

)

Retrieve DreamPassport's ISP configuration.

This function retrieves the console's ISP settings as set by DreamPassport, if they exist. You should check the valid_fields bitfield for the part of the struct you want before relying on the data.

Parameters

out	Storage for the structure.

Return values

0	On success.
-1	On error (no settings found, or other errors).

flashrom_get_pw_ispcfg()

int flashrom_get_pw_ispcfg

(

flashrom_ispcfg_t *

out

)

Retrieve PlanetWeb's ISP configuration.

This function retrieves the console's ISP settings as set by PlanetWeb (1.0 and 2.1 have been verified to work), if they exist. You should check the valid_fields bitfield for the part of the struct you want before relying on the data.

Parameters

out	Storage for the structure.

Return values

0	On success.
-1	On error (i.e, no PlanetWeb settings found).

flashrom_get_region()

int flashrom_get_region

(

void

)

Retrieve the console's region code.

This function attempts to find the region of the Dreamcast. It may or may not work on 100% of Dreamcasts, apparently.

Returns

A region code (>=0), or error (<0).

See also

Region Settings

Error Values

flashrom_get_syscfg()

int flashrom_get_syscfg

(

flashrom_syscfg_t *

out

)

Retrieve the current system configuration settings.

Parameters

out	Storage for the configuration.

Returns

0 on success, <0 on error.

See also

Error Values

flashrom_info()

int flashrom_info	(	int	part,
		int *	start_out,
		int *	size_out
	)

Retrieve information about the given partition.

This function implements the FLASHROM_INFO syscall; given a partition ID, return two ints specifying the beginning and the size of the partition (respectively) inside the flashrom.

Parameters

part	The partition ID in question.
start_out	Buffer for storing the start address.
size_out	Buffer for storing the size of the partition.

Return values

0	On success.
-1	On error.

flashrom_read()

int flashrom_read	(	int	offset,
		void *	buffer_out,
		int	bytes
	)

Read data from the flashrom.

This function implements the FLASHROM_READ syscall; given a flashrom offset, an output buffer, and a count, this reads data from the flashrom.

Parameters

offset	The offset to read from.
buffer_out	Space to read into.
bytes	The number of bytes to read.

Returns

The number of bytes read if successful, or -1 otherwise.

flashrom_write()

int flashrom_write	(	int	offset,
		void *	buffer,
		int	bytes
	)

Write data to the flashrom.

This function implements the FLASHROM_WRITE syscall; given a flashrom offset, an input buffer, and a count, this writes data to the flashrom.

Note

It is not possible to write ones to the flashrom over zeros. If you want to do this, you must save the old data in the flashrom, delete it out, and save the new data back.

Parameters

offset	The offset to write at.
buffer	The data to write.
bytes	The number of bytes to write.

Returns

The number of bytes written if successful, -1 otherwise.