Include dependency graph for at91sam9.c:

Data Structures
struct	at91sam9_nand
	Private data for the controller that is stored in the NAND device structure. More...

struct	at91sam9_pin
	Representation of a pin on an AT91SAM9 chip. More...

Macros
#define	AT91C_ECCX_CR (0x00)
	Offset to ECC CR. More...

#define	AT91C_ECCX_NPR (0x10)
	Offset to ECC NPR. More...

#define	AT91C_ECCX_PR (0x0C)
	Offset to ECC PR. More...

#define	AT91C_ECCX_SR (0x08)
	Offset to ECC SR. More...

#define	AT91C_PIOX_CODR (0x34)
	Offset to PIO CODR. More...

#define	AT91C_PIOX_PDSR (0x3C)
	Offset to PIO PDSR. More...

#define	AT91C_PIOX_SODR (0x30)
	Offset to PIO SODR. More...

Functions
static int	at91sam9_address (struct nand_device *nand, uint8_t address)
	Send an address to the NAND device attached to an AT91SAM9 NAND controller. More...

static int	at91sam9_command (struct nand_device *nand, uint8_t command)
	Send a command to the NAND device. More...

static int	at91sam9_disable (struct nand_device *nand)
	Disable NAND device attached to a controller. More...

static int	at91sam9_ecc_init (struct target target, struct at91sam9_nand info)
	Initialize the ECC controller on the AT91SAM9. More...

static int	at91sam9_enable (struct nand_device *nand)
	Enable NAND device attached to a controller. More...

static int	at91sam9_halted (struct target target, const char label)
	Checks if the target is halted and prints an error message if it isn't. More...

static int	at91sam9_init (struct nand_device *nand)
	Initialize the AT91SAM9 NAND controller. More...

static int	at91sam9_nand_ready (struct nand_device *nand, int timeout)
	Determine if the NAND device is ready by looking at the ready/~busy pin. More...

static uint8_t *	at91sam9_oob_init (struct nand_device nand, uint8_t oob, uint32_t *size)
	Initialize an area for the OOB based on whether a user is requesting the OOB data. More...

static int	at91sam9_read_block_data (struct nand_device nand, uint8_t data, int size)
	Read a block of data from the NAND device attached to an AT91SAM9. More...

static int	at91sam9_read_data (struct nand_device nand, void data)
	Read data directly from the NAND device attached to an AT91SAM9 NAND controller. More...

static int	at91sam9_read_page (struct nand_device nand, uint32_t page, uint8_t data, uint32_t data_size, uint8_t *oob, uint32_t oob_size)
	Reads a page from an AT91SAM9 NAND controller and verifies using 1-bit ECC controller on chip. More...

static int	at91sam9_reset (struct nand_device *nand)
	Reset the AT91SAM9 NAND controller. More...

static int	at91sam9_write_block_data (struct nand_device nand, uint8_t data, int size)
	Write a block of data to a NAND device attached to an AT91SAM9. More...

static int	at91sam9_write_data (struct nand_device *nand, uint16_t data)
	Write data directly to the NAND device attached to an AT91SAM9 NAND controller. More...

static int	at91sam9_write_page (struct nand_device nand, uint32_t page, uint8_t data, uint32_t data_size, uint8_t *oob, uint32_t oob_size)
	Write a page of data including 1-bit ECC information to a NAND device attached to an AT91SAM9 controller. More...

	COMMAND_HANDLER (handle_at91sam9_ale_command)
	Handle the AT91SAM9 ALE command for specifying the address line to use for writing addresses to the NAND device. More...

	COMMAND_HANDLER (handle_at91sam9_ce_command)
	Handle the AT91SAM9 CE command for specifying the pin that is used to enable or disable the NAND device. More...

	COMMAND_HANDLER (handle_at91sam9_cle_command)
	Handle the AT91SAM9 CLE command for specifying the address line to use for writing commands to a NAND device. More...

	COMMAND_HANDLER (handle_at91sam9_rdy_busy_command)
	Handle the AT91SAM9 RDY/~BUSY command for specifying the pin that watches the RDY/~BUSY line from the NAND device. More...

	NAND_DEVICE_COMMAND_HANDLER (at91sam9_nand_device_command)
	Handle the initial NAND device command for AT91SAM9 controllers. More...

Variables
static const struct command_registration	at91sam9_command_handler []

struct nand_flash_controller	at91sam9_nand_controller
	Structure representing the AT91SAM9 NAND controller. More...

static const struct command_registration	at91sam9_sub_command_handlers []

Macro Definition Documentation

◆ AT91C_ECCX_CR

#define AT91C_ECCX_CR (0x00)

Offset to ECC CR.

Definition at line 20 of file at91sam9.c.

◆ AT91C_ECCX_NPR

#define AT91C_ECCX_NPR (0x10)

Offset to ECC NPR.

Definition at line 23 of file at91sam9.c.

◆ AT91C_ECCX_PR

#define AT91C_ECCX_PR (0x0C)

Offset to ECC PR.

Definition at line 22 of file at91sam9.c.

◆ AT91C_ECCX_SR

#define AT91C_ECCX_SR (0x08)

Offset to ECC SR.

Definition at line 21 of file at91sam9.c.

◆ AT91C_PIOX_CODR

#define AT91C_PIOX_CODR (0x34)

Offset to PIO CODR.

Definition at line 18 of file at91sam9.c.

◆ AT91C_PIOX_PDSR

#define AT91C_PIOX_PDSR (0x3C)

Offset to PIO PDSR.

Definition at line 19 of file at91sam9.c.

◆ AT91C_PIOX_SODR

#define AT91C_PIOX_SODR (0x30)

Offset to PIO SODR.

Definition at line 17 of file at91sam9.c.

Function Documentation

◆ at91sam9_address()

static int at91sam9_address	(	struct nand_device *	nand,
		uint8_t	address
	)

static

Send an address to the NAND device attached to an AT91SAM9 NAND controller.

Parameters

nand	NAND device to send the address to.
address	Address to be sent.

Returns: Success or failure of sending the address.

Definition at line 163 of file at91sam9.c.

References at91sam9_halted(), nand_device::controller_priv, ERROR_NAND_OPERATION_FAILED, info, nand_device::target, and target_write_u8().

◆ at91sam9_command()

static int at91sam9_command	(	struct nand_device *	nand,
		uint8_t	command
	)

static

Send a command to the NAND device.

Parameters

nand	NAND device to write the command to.
command	Command to be written.

Returns: Success or failure of writing the command.

Definition at line 129 of file at91sam9.c.

References at91sam9_enable(), at91sam9_halted(), nand_device::controller_priv, ERROR_NAND_OPERATION_FAILED, info, nand_device::target, and target_write_u8().

◆ at91sam9_disable()

static int at91sam9_disable ( struct nand_device * nand )

static

Disable NAND device attached to a controller.

Parameters

nand	NAND controller information for controlling NAND device.

Returns: Success or failure of the disabling.

Definition at line 114 of file at91sam9.c.

References AT91C_PIOX_SODR, nand_device::controller_priv, info, nand_device::target, and target_write_u32().

Referenced by at91sam9_reset().

◆ at91sam9_ecc_init()

static int at91sam9_ecc_init	(	struct target *	target,
		struct at91sam9_nand *	info
	)

static

Initialize the ECC controller on the AT91SAM9.

Parameters

target	Target to configure ECC on.
info	NAND controller information for where the ECC is.

Returns: Success or failure of initialization.

Definition at line 295 of file at91sam9.c.

References AT91C_ECCX_CR, ERROR_NAND_OPERATION_FAILED, info, LOG_ERROR, and target_write_u32().

Referenced by at91sam9_read_page(), and at91sam9_write_page().

◆ at91sam9_enable()

static int at91sam9_enable ( struct nand_device * nand )

static

Enable NAND device attached to a controller.

Parameters

nand	NAND controller information for controlling NAND device.

Returns: Success or failure of the enabling.

Definition at line 100 of file at91sam9.c.

References AT91C_PIOX_CODR, nand_device::controller_priv, info, nand_device::target, and target_write_u32().

Referenced by at91sam9_command().

◆ at91sam9_halted()

static int at91sam9_halted	(	struct target *	target,
		const char *	label
	)

static

Checks if the target is halted and prints an error message if it isn't.

Parameters

target	Target to be checked.
label	String label for where function is called from.

Returns: True if the target is halted.

Definition at line 69 of file at91sam9.c.

References label, LOG_ERROR, target::state, and TARGET_HALTED.

Referenced by at91sam9_address(), at91sam9_command(), at91sam9_init(), at91sam9_nand_ready(), at91sam9_read_block_data(), at91sam9_read_data(), at91sam9_reset(), at91sam9_write_block_data(), and at91sam9_write_data().

◆ at91sam9_init()

static int at91sam9_init ( struct nand_device * nand )

static

Initialize the AT91SAM9 NAND controller.

Parameters

nand	NAND device the controller is attached to.

Returns: Success or failure of initialization.

Definition at line 84 of file at91sam9.c.

References at91sam9_halted(), ERROR_NAND_OPERATION_FAILED, ERROR_OK, and nand_device::target.

◆ at91sam9_nand_ready()

static int at91sam9_nand_ready	(	struct nand_device *	nand,
		int	timeout
	)

static

Determine if the NAND device is ready by looking at the ready/~busy pin.

Parameters

nand	NAND device to check.
timeout	Time in milliseconds to wait for NAND to be ready.

Returns: True if the NAND is ready in the timeout period.

Definition at line 219 of file at91sam9.c.

References alive_sleep(), AT91C_PIOX_PDSR, at91sam9_halted(), nand_device::controller_priv, info, status, nand_device::target, and target_read_u32().

◆ at91sam9_oob_init()

static uint8_t* at91sam9_oob_init	(	struct nand_device *	nand,
		uint8_t *	oob,
		uint32_t *	size
	)

static

Initialize an area for the OOB based on whether a user is requesting the OOB data.

This determines the size of the OOB and allocates the space in case the user has not requested the OOB data.

Parameters

nand	NAND device we are creating an OOB for.
oob	Pointer to the user supplied OOB area.
size	Size of the OOB.

Returns: Pointer to an area to store OOB data.

Definition at line 316 of file at91sam9.c.

References LOG_ERROR, NULL, nand_device::page_size, and size.

Referenced by at91sam9_read_page(), and at91sam9_write_page().

◆ at91sam9_read_block_data()

static int at91sam9_read_block_data	(	struct nand_device *	nand,
		uint8_t *	data,
		int	size
	)

static

Read a block of data from the NAND device attached to an AT91SAM9.

This utilizes the ARM hosted NAND read function.

Parameters

nand	NAND device to read from.
data	Pointer to where the read data should be placed.
size	Size of the data being read.

Returns: Success or failure of the hosted read.

Definition at line 249 of file at91sam9.c.

References arm_nandread(), at91sam9_halted(), arm_nand_data::chunk_size, nand_device::controller_priv, arm_nand_data::data, ERROR_NAND_OPERATION_FAILED, info, nand_device::page_size, size, status, and nand_device::target.

◆ at91sam9_read_data()

static int at91sam9_read_data	(	struct nand_device *	nand,
		void *	data
	)

static

Read data directly from the NAND device attached to an AT91SAM9 NAND controller.

Parameters

nand	NAND device to read from.
data	Pointer to where the data should be put.

Returns: Success or failure of reading the data.

Definition at line 182 of file at91sam9.c.

References at91sam9_halted(), nand_device::controller_priv, ERROR_NAND_OPERATION_FAILED, info, nand_device::target, and target_read_u8().

◆ at91sam9_read_page()

static int at91sam9_read_page	(	struct nand_device *	nand,
		uint32_t	page,
		uint8_t *	data,
		uint32_t	data_size,
		uint8_t *	oob,
		uint32_t	oob_size
	)

static

Reads a page from an AT91SAM9 NAND controller and verifies using 1-bit ECC controller on chip.

This makes an attempt to correct any errors that are encountered while reading the page of data.

Parameters

nand	NAND device to read from
page	Page to be read.
data	Pointer to where data should be read to.
data_size	Size of the data to be read.
oob	Pointer to where OOB data should be read to.
oob_size	Size of the OOB data to be read.

Returns: Success or failure of reading the NAND page.

Definition at line 350 of file at91sam9.c.

References AT91C_ECCX_PR, AT91C_ECCX_SR, at91sam9_ecc_init(), at91sam9_oob_init(), bit(), nand_device::controller_priv, ERROR_OK, info, LOG_ERROR, LOG_INFO, NAND_CMD_READ0, nand_page_command(), nand_read_data_page(), parity(), status, nand_device::target, and target_read_u32().

◆ at91sam9_reset()

static int at91sam9_reset ( struct nand_device * nand )

static

Reset the AT91SAM9 NAND controller.

Parameters

nand	NAND device to be reset.

Returns: Success or failure of reset.

Definition at line 148 of file at91sam9.c.

References at91sam9_disable(), at91sam9_halted(), ERROR_NAND_OPERATION_FAILED, and nand_device::target.

◆ at91sam9_write_block_data()

static int at91sam9_write_block_data	(	struct nand_device *	nand,
		uint8_t *	data,
		int	size
	)

static

Write a block of data to a NAND device attached to an AT91SAM9.

This uses the ARM hosted write function to write the data.

Parameters

nand	NAND device to write to.
data	Data to be written to device.
size	Size of the data being written.

Returns: Success or failure of the hosted write.

Definition at line 273 of file at91sam9.c.

References arm_nandwrite(), at91sam9_halted(), arm_nand_data::chunk_size, nand_device::controller_priv, arm_nand_data::data, ERROR_NAND_OPERATION_FAILED, info, nand_device::page_size, size, status, and nand_device::target.

◆ at91sam9_write_data()

static int at91sam9_write_data	(	struct nand_device *	nand,
		uint16_t	data
	)

static

Write data directly to the NAND device attached to an AT91SAM9 NAND controller.

Parameters

nand	NAND device to be written to.
data	Data to be written.

Returns: Success or failure of the data write.

Definition at line 201 of file at91sam9.c.

References at91sam9_halted(), nand_device::controller_priv, ERROR_NAND_OPERATION_FAILED, info, nand_device::target, and target_write_u8().

◆ at91sam9_write_page()

static int at91sam9_write_page	(	struct nand_device *	nand,
		uint32_t	page,
		uint8_t *	data,
		uint32_t	data_size,
		uint8_t *	oob,
		uint32_t	oob_size
	)

static

Write a page of data including 1-bit ECC information to a NAND device attached to an AT91SAM9 controller.

If there is OOB data to be written, this will ignore the computed ECC from the ECC controller.

Parameters

nand	NAND device to write to.
page	Page to write.
data	Pointer to data being written.
data_size	Size of the data being written.
oob	Pointer to OOB data being written.
oob_size	Size of the OOB data.

Returns: Success or failure of the page write.

Definition at line 425 of file at91sam9.c.

References AT91C_ECCX_NPR, AT91C_ECCX_PR, at91sam9_ecc_init(), at91sam9_oob_init(), nand_device::controller_priv, ERROR_OK, info, LOG_ERROR, NAND_CMD_SEQIN, nand_page_command(), nand_write_data_page(), nand_write_finish(), parity(), nand_device::target, and target_read_u32().

◆ COMMAND_HANDLER() [1/4]

COMMAND_HANDLER ( handle_at91sam9_ale_command )

Handle the AT91SAM9 ALE command for specifying the address line to use for writing addresses to the NAND device.

Definition at line 562 of file at91sam9.c.

References CMD, CMD_ARGC, CMD_ARGV, COMMAND_PARSE_NUMBER, command_print(), nand_device::controller_priv, ERROR_COMMAND_ARGUMENT_INVALID, ERROR_COMMAND_SYNTAX_ERROR, ERROR_OK, get_nand_device_by_num(), info, and NULL.

◆ COMMAND_HANDLER() [2/4]

COMMAND_HANDLER ( handle_at91sam9_ce_command )

Handle the AT91SAM9 CE command for specifying the pin that is used to enable or disable the NAND device.

Definition at line 621 of file at91sam9.c.

◆ COMMAND_HANDLER() [3/4]

COMMAND_HANDLER ( handle_at91sam9_cle_command )

Handle the AT91SAM9 CLE command for specifying the address line to use for writing commands to a NAND device.

Definition at line 532 of file at91sam9.c.

References CMD, CMD_ARGC, CMD_ARGV, COMMAND_PARSE_NUMBER, command_print(), nand_device::controller_priv, ERROR_OK, get_nand_device_by_num(), info, and NULL.

◆ COMMAND_HANDLER() [4/4]

COMMAND_HANDLER ( handle_at91sam9_rdy_busy_command )

Handle the AT91SAM9 RDY/~BUSY command for specifying the pin that watches the RDY/~BUSY line from the NAND device.

Definition at line 590 of file at91sam9.c.

References CMD, CMD_ARGC, CMD_ARGV, COMMAND_PARSE_NUMBER, command_print(), nand_device::controller_priv, ERROR_COMMAND_ARGUMENT_INVALID, ERROR_COMMAND_SYNTAX_ERROR, ERROR_OK, get_nand_device_by_num(), info, and NULL.

◆ NAND_DEVICE_COMMAND_HANDLER()

NAND_DEVICE_COMMAND_HANDLER ( at91sam9_nand_device_command )

Handle the initial NAND device command for AT91SAM9 controllers.

This initializes much of the controller information struct to be ready for future reads and writes.

Definition at line 483 of file at91sam9.c.

References ARM_NAND_NONE, CMD_ARGC, CMD_ARGV, COMMAND_PARSE_NUMBER, ERROR_NAND_OPERATION_FAILED, ERROR_OK, info, LOG_DEBUG, LOG_ERROR, and NULL.

Variable Documentation

◆ at91sam9_command_handler

const struct command_registration at91sam9_command_handler[]

static

Initial value:

= {
    {
        .name = "at91sam9",
        .mode = COMMAND_ANY,
        .help = "AT91SAM9 NAND flash controller commands",
        .usage = "",
        .chain = at91sam9_sub_command_handlers,
    },
    COMMAND_REGISTRATION_DONE
}

Definition at line 621 of file at91sam9.c.

◆ at91sam9_nand_controller

struct nand_flash_controller at91sam9_nand_controller

Initial value:

= {
    .name = "at91sam9",
    .nand_device_command = at91sam9_nand_device_command,
    .commands = at91sam9_command_handler,
    .init = at91sam9_init,
    .command = at91sam9_command,
    .reset = at91sam9_reset,
    .address = at91sam9_address,
    .read_data = at91sam9_read_data,
    .write_data = at91sam9_write_data,
    .nand_ready = at91sam9_nand_ready,
    .read_block_data = at91sam9_read_block_data,
    .write_block_data = at91sam9_write_block_data,
    .read_page = at91sam9_read_page,
    .write_page = at91sam9_write_page,
}

Structure representing the AT91SAM9 NAND controller.

Definition at line 621 of file at91sam9.c.

◆ at91sam9_sub_command_handlers

const struct command_registration at91sam9_sub_command_handlers[]

static

Definition at line 621 of file at91sam9.c.

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ AT91C_ECCX_CR

◆ AT91C_ECCX_NPR

◆ AT91C_ECCX_PR

◆ AT91C_ECCX_SR

◆ AT91C_PIOX_CODR

◆ AT91C_PIOX_PDSR

◆ AT91C_PIOX_SODR

Function Documentation

◆ at91sam9_address()

◆ at91sam9_command()

◆ at91sam9_disable()

◆ at91sam9_ecc_init()

◆ at91sam9_enable()

◆ at91sam9_halted()

◆ at91sam9_init()

◆ at91sam9_nand_ready()

◆ at91sam9_oob_init()

◆ at91sam9_read_block_data()

◆ at91sam9_read_data()

◆ at91sam9_read_page()

◆ at91sam9_reset()

◆ at91sam9_write_block_data()

◆ at91sam9_write_data()

◆ at91sam9_write_page()

◆ COMMAND_HANDLER() [1/4]

◆ COMMAND_HANDLER() [2/4]

◆ COMMAND_HANDLER() [3/4]

◆ COMMAND_HANDLER() [4/4]

◆ NAND_DEVICE_COMMAND_HANDLER()

Variable Documentation

◆ at91sam9_command_handler

◆ at91sam9_nand_controller

◆ at91sam9_sub_command_handlers