#include <barrier.h>
#include <io.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <types.h>
#include <log.h>
#include <timer.h>
#include <sys-clk.h>
#include <sys-gpio.h>
#include <mmc/sys-mmc.h>
#include <mmc/sys-sdhci.h>

Include dependency graph for sys-mmc.c:

Macros
#define	UNSTUFF_BITS(resp, start, size)
	Extracts a specified bit field from a response buffer.

Functions
static int	sunxi_mmc_host_is_spi (mmc_t *mmc)
	Checks if the MMC host operates in SPI mode.

static int	sunxi_mmc_device_is_sd (mmc_t *mmc)
	Checks if the MMC device is an SD card.

static uint32_t	extract_mid (mmc_t *card)
	Extracts the Manufacturer ID from the MMC card.

static uint32_t	extract_oid (mmc_t *card)
	Extracts the OEM/Application ID from the MMC card.

static uint32_t	extract_prv (mmc_t *card)
	Extracts the Product Revision from the MMC card.

static uint32_t	extract_psn (mmc_t *card)
	Extracts the Product Serial Number (PSN) from the MMC card.

static uint32_t	extract_month (mmc_t *card)
	Extracts the manufacturing month from the MMC card.

static uint32_t	extract_year (mmc_t *card)
	Extracts the manufacturing year from the MMC card.

static int	sunxi_mmc_send_status (sunxi_sdhci_t *sdhci, uint32_t timeout)
	Sends status command to the SD/MMC card and waits for the card to be ready.

static int	sunxi_mmc_set_block_len (sunxi_sdhci_t *sdhci, uint32_t len)
	Sets the block length for data transfer on the SD/MMC card.

static uint32_t	sunxi_mmc_read_blocks (sunxi_sdhci_t sdhci, void dst, uint32_t start, uint32_t blkcnt)
	Reads blocks from the SD/MMC card.

static uint32_t	sunxi_mmc_write_blocks (sunxi_sdhci_t sdhci, void dst, uint32_t start, uint32_t blkcnt)
	Writes blocks of data to the MMC device.

static int	sunxi_mmc_go_idle (sunxi_sdhci_t *sdhci)
	Sends the SD/MMC card to idle state.

static int	sunxi_mmc_sd_send_op_cond (sunxi_sdhci_t *sdhci)
	Sends SD card initialization sequence and waits for it to become ready.

static int	sunxi_mmc_mmc_send_op_cond (sunxi_sdhci_t *sdhci)
	Send the SEND_OP_COND command to the MMC/SD card.

static int	sunxi_mmc_send_ext_csd (sunxi_sdhci_t sdhci, char ext_csd)
	Send the SEND_EXT_CSD command to retrieve the Extended CSD from the MMC/SD card.

static int	sunxi_mmc_switch (sunxi_sdhci_t *sdhci, uint8_t set, uint8_t index, uint8_t value)
	Send the SWITCH command to the MMC/SD card to change a specified mode or setting.

static int	sunxi_mmc_mmc_change_freq (sunxi_sdhci_t *sdhci)
	Change the frequency of the MMC/SD card to support high-speed modes.

static int	sunxi_mmc_sd_switch (sunxi_sdhci_t sdhci, int mode, int group, uint8_t value, uint8_t resp)
	Switch the functionality of the SD card.

static int	sunxi_mmc_sd_change_freq (sunxi_sdhci_t *sdhci)
	Change the frequency of the SD card.

static void	sunxi_mmc_set_clock (sunxi_sdhci_t *sdhci, uint32_t clock)
	Set the clock frequency for the Sunxi SDHCI controller.

static void	sunxi_mmc_set_bus_width (sunxi_sdhci_t *sdhci, uint32_t width)
	Set the bus width for the Sunxi SDHCI controller.

static int	sunxi_mmc_mmc_switch_ds (sunxi_sdhci_t *sdhci)
	Switch the Sunxi SDHCI controller to Double Speed (DS) mode.

static int	sunxi_mmc_mmc_switch_hs (sunxi_sdhci_t *sdhci)
	Switch the Sunxi SDHCI controller to High Speed (HS) mode.

static int	sunxi_mmc_mmc_switch_hs200 (sunxi_sdhci_t *sdhci)
	Switch the Sunxi SDHCI controller to High Speed 200 (HS200) mode.

static int	sunxi_mmc_mmc_switch_hs400 (sunxi_sdhci_t *sdhci)
	Switch the Sunxi SDHCI controller to High Speed 400 (HS400) mode.

static int	sunxi_mmc_mmc_switch_speed_mode (sunxi_sdhci_t *sdhci, uint32_t spd_mode)
	Switches the speed mode of the MMC controller.

static int	sunxi_mmc_check_bus_width (sunxi_sdhci_t *sdhci, uint32_t emmc_hs_ddr, uint32_t bus_width)
	Checks if the specified bus width is supported by the MMC controller.

static int	sunxi_mmc_mmc_switch_bus_width (sunxi_sdhci_t *sdhci, uint32_t spd_mode, uint32_t width)
	Switches the bus width of the MMC controller.

static int	sunxi_mmc_mmc_switch_bus_mode (sunxi_sdhci_t *sdhci, uint32_t spd_mode, uint32_t width)
	Switches the speed mode and bus width of the MMC controller.

static int	sunxi_mmc_sd_send_if_cond (sunxi_sdhci_t *sdhci)
	Sends the SD CMD8 (SEND_IF_COND) command to the MMC controller.

static void	sunxi_mmc_show_card_info (sunxi_sdhci_t *sdhci)
	Displays information about the SD/MMC card attached to the given host controller.

static int	sunxi_mmc_probe (sunxi_sdhci_t *sdhci)
	Probes the SD/MMC card attached to the given host controller.

int	sunxi_mmc_init (void *sdhci_hdl)
	Initializes the SD/MMC host controller and attached card.

uint32_t	sunxi_mmc_blk_read (void sdhci, void dst, uint32_t start, uint32_t blkcnt)
	Read blocks from the Sunxi MMC block device.

uint32_t	sunxi_mmc_blk_write (void sdhci, void dst, uint32_t start, uint32_t blkcnt)
	Writes blocks of data to the MMC device using the specified SDHCI instance.

Variables
static const int	tran_speed_unit []

static const int	tran_speed_time []

Macro Definition Documentation

◆ UNSTUFF_BITS

#define UNSTUFF_BITS	(	resp,
		start,
		size
	)

Value:

    ({                                                               \
        const int __size = size;                                     \
        const uint32_t __mask = (__size < 32 ? 1 << __size : 0) - 1; \
        const int __off = 3 - ((start) / 32);                        \
        const int __shft = (start) &31;                              \
        uint32_t __res;                                              \
                                                                     \
        __res = resp[__off] >> __shft;                               \
        if (__size + __shft > 32)                                    \
            __res |= resp[__off - 1] << ((32 - __shft) % 32);        \
        __res &__mask;                                               \
    })

Extracts a specified bit field from a response buffer.

This macro extracts a specified bit field from a response buffer or an array of integers. It calculates the offset, shift amount, and bitmask based on the starting position and size of the field, then performs the extraction and applies the bitmask to isolate the desired bits.

Parameters

resp	The response buffer or array of integers.
start	The starting bit position of the field within the response buffer.
size	The size (in bits) of the field to be extracted.

Returns: The extracted bit field.

Function Documentation

◆ extract_mid()

static uint32_t extract_mid ( mmc_t * card )

inlinestatic

Extracts the Manufacturer ID from the MMC card.

This function extracts the Manufacturer ID from the MMC card's CID (Card Identification Data) register. The extraction is performed based on the MMC version and CID structure.

Parameters

card	Pointer to the MMC card structure.

Returns: The Manufacturer ID.

◆ extract_month()

static uint32_t extract_month ( mmc_t * card )

inlinestatic

Extracts the manufacturing month from the MMC card.

This function extracts the manufacturing month from the MMC card's CID (Card Identification Data) register.

Parameters

card	Pointer to the MMC card structure.

Returns: The manufacturing month.

◆ extract_oid()

static uint32_t extract_oid ( mmc_t * card )

inlinestatic

Extracts the OEM/Application ID from the MMC card.

This function extracts the OEM/Application ID from the MMC card's CID (Card Identification Data) register.

Parameters

card	Pointer to the MMC card structure.

Returns: The OEM/Application ID.

◆ extract_prv()

static uint32_t extract_prv ( mmc_t * card )

inlinestatic

Extracts the Product Revision from the MMC card.

This function extracts the Product Revision from the MMC card's CID (Card Identification Data) register.

Parameters

card	Pointer to the MMC card structure.

Returns: The Product Revision.

◆ extract_psn()

static uint32_t extract_psn ( mmc_t * card )

inlinestatic

Extracts the Product Serial Number (PSN) from the MMC card.

This function extracts the Product Serial Number (PSN) from the MMC card based on its version and CSD/CID structure.

Parameters

card	Pointer to the MMC card structure.

Returns: The Product Serial Number.

◆ extract_year()

static uint32_t extract_year ( mmc_t * card )

inlinestatic

Extracts the manufacturing year from the MMC card.

This function extracts the manufacturing year from the MMC card's CID (Card Identification Data) register.

Parameters

card	Pointer to the MMC card structure.

Returns: The manufacturing year.

◆ sunxi_mmc_blk_read()

uint32_t sunxi_mmc_blk_read	(	void *	sdhci,
		void *	dst,
		uint32_t	start,
		uint32_t	blkcnt
	)

Read blocks from the Sunxi MMC block device.

This function reads a specified number of blocks from the Sunxi MMC block device and stores the data into the destination buffer.

Parameters

sdhci	Pointer to the Sunxi SD Host Controller instance
dst	Pointer to the destination buffer where the read data will be stored
start	The starting block number to read from
blkcnt	The number of blocks to read

Returns: Returns 0 on success, or an error code if the operation fails

◆ sunxi_mmc_blk_write()

uint32_t sunxi_mmc_blk_write	(	void *	sdhci,
		void *	dst,
		uint32_t	start,
		uint32_t	blkcnt
	)

Writes blocks of data to the MMC device using the specified SDHCI instance.

This function writes a specified number of blocks to the MMC (MultiMediaCard) device associated with the given SDHCI (SD Host Controller Interface) instance. It serves as a wrapper around the sunxi_mmc_write_blocks function, providing a simplified interface for block data write operations.

Parameters

[in]	sdhci	A pointer to the SDHCI instance.
[in]	dst	A pointer to the destination buffer from which data will be written to the MMC.
[in]	start	The starting block number where the data writing begins.
[in]	blkcnt	The number of blocks to write.

Returns: The number of blocks successfully written, or 0 if writing failed.

◆ sunxi_mmc_check_bus_width()

static int sunxi_mmc_check_bus_width	(	sunxi_sdhci_t *	sdhci,
		uint32_t	emmc_hs_ddr,
		uint32_t	bus_width
	)

static

Checks if the specified bus width is supported by the MMC controller.

This function checks if the specified bus width is supported by the MMC controller, based on the provided parameters.

Parameters

sdhci	Pointer to the SD/MMC host controller structure.
emmc_hs_ddr	Flag indicating if eMMC high-speed DDR mode is enabled.
bus_width	The bus width to be checked.

Returns: Returns 0 if the bus width is supported, -1 if not.

◆ sunxi_mmc_device_is_sd()

static int sunxi_mmc_device_is_sd ( mmc_t * mmc )

inlinestatic

Checks if the MMC device is an SD card.

This function checks if the MMC device is an SD card based on its version information.

Parameters

mmc	Pointer to the MMC structure.

Returns: 1 if the device is an SD card, 0 otherwise.

◆ sunxi_mmc_go_idle()

static int sunxi_mmc_go_idle ( sunxi_sdhci_t * sdhci )

static

Sends the SD/MMC card to idle state.

This function sends the SD/MMC card to the idle state, preparing it for further commands.

Parameters

sdhci Pointer to the SDHCI controller structure.

Returns: 0 on success, error code otherwise.

◆ sunxi_mmc_host_is_spi()

static int sunxi_mmc_host_is_spi ( mmc_t * mmc )

inlinestatic

Checks if the MMC host operates in SPI mode.

This function checks if the MMC host operates in SPI mode based on its capabilities.

Parameters

mmc	Pointer to the MMC structure.

Returns: 1 if the host operates in SPI mode, 0 otherwise.

◆ sunxi_mmc_init()

int sunxi_mmc_init ( void * sdhci_hdl )

Initializes the SD/MMC host controller and attached card.

This function initializes the specified SD/MMC host controller and the attached SD/MMC card. It initializes the host controller core, sets the bus width and clock speed, resets the card, and initializes the card based on its type (SD or eMMC). Finally, it probes the card to retrieve card-specific data.

Parameters

sdhci_hdl Pointer to the SD/MMC host controller structure.

Returns: 0 on success, or an error code if an error occurred during initialization.

◆ sunxi_mmc_mmc_change_freq()

static int sunxi_mmc_mmc_change_freq ( sunxi_sdhci_t * sdhci )

static

Change the frequency of the MMC/SD card to support high-speed modes.

This function changes the frequency of the MMC/SD card to support high-speed modes. It checks if the card supports high-speed modes and switches to the appropriate mode if possible.

Parameters

sdhci Pointer to the Sunxi SDHCI controller structure.

Returns

Returns 0 on success, indicating successful completion of the frequency change, or an error code indicating failure. Possible error codes:

Negative value: indicates a communication error with the MMC/SD card.
Positive value: indicates an internal error within the function.

◆ sunxi_mmc_mmc_send_op_cond()

static int sunxi_mmc_mmc_send_op_cond ( sunxi_sdhci_t * sdhci )

static

Send the SEND_OP_COND command to the MMC/SD card.

This function sends the SEND_OP_COND command to the MMC/SD card to initialize and check its capabilities. It waits for the card to respond and initializes it, updating the MMC structure with card information upon successful initialization.

Parameters

sdhci Pointer to the Sunxi SDHCI controller structure.

Returns

Returns 0 on success, indicating successful initialization of the card, or an error code indicating failure. Possible error codes:

Negative value: indicates a communication error with the MMC/SD card.
Positive value: indicates an internal error within the function.
UNUSABLE_ERR: indicates failure to initialize the card within the timeout.

◆ sunxi_mmc_mmc_switch_bus_mode()

static int sunxi_mmc_mmc_switch_bus_mode	(	sunxi_sdhci_t *	sdhci,
		uint32_t	spd_mode,
		uint32_t	width
	)

static

Switches the speed mode and bus width of the MMC controller.

This function switches the speed mode and bus width of the MMC controller based on the provided parameters. If the device is an SD card, no action is taken and the function returns successfully.

Parameters

sdhci	Pointer to the SD/MMC host controller structure.
spd_mode	Speed mode to be switched to.
width	The bus width to be set.

Returns: Returns 0 upon success, an error code if an error occurs.

◆ sunxi_mmc_mmc_switch_bus_width()

static int sunxi_mmc_mmc_switch_bus_width	(	sunxi_sdhci_t *	sdhci,
		uint32_t	spd_mode,
		uint32_t	width
	)

static

Switches the bus width of the MMC controller.

This function switches the bus width of the MMC controller based on the provided parameters.

Parameters

sdhci	Pointer to the SD/MMC host controller structure.
spd_mode	Speed mode of the MMC controller.
width	The bus width to be set.

Returns: Returns 0 upon success, -1 if an error occurs.

◆ sunxi_mmc_mmc_switch_ds()

static int sunxi_mmc_mmc_switch_ds ( sunxi_sdhci_t * sdhci )

static

Switch the Sunxi SDHCI controller to Double Speed (DS) mode.

This function switches the Secure Digital Host Controller Interface (SDHCI) in a Sunxi system-on-a-chip (SoC) environment to Double Speed (DS) mode.

Parameters

sdhci A pointer to the Sunxi SDHCI controller structure.

Returns: Returns 0 on success, or a negative error code on failure.

◆ sunxi_mmc_mmc_switch_hs()

static int sunxi_mmc_mmc_switch_hs ( sunxi_sdhci_t * sdhci )

static

Switch the Sunxi SDHCI controller to High Speed (HS) mode.

This function switches the Secure Digital Host Controller Interface (SDHCI) in a Sunxi system-on-a-chip (SoC) environment to High Speed (HS) mode.

Parameters

sdhci A pointer to the Sunxi SDHCI controller structure.

Returns: Returns 0 on success, or a negative error code on failure.

◆ sunxi_mmc_mmc_switch_hs200()

static int sunxi_mmc_mmc_switch_hs200 ( sunxi_sdhci_t * sdhci )

static

Switch the Sunxi SDHCI controller to High Speed 200 (HS200) mode.

This function switches the Secure Digital Host Controller Interface (SDHCI) in a Sunxi system-on-a-chip (SoC) environment to High Speed 200 (HS200) mode.

Parameters

sdhci A pointer to the Sunxi SDHCI controller structure.

Returns: Returns 0 on success, or a negative error code on failure.

◆ sunxi_mmc_mmc_switch_hs400()

static int sunxi_mmc_mmc_switch_hs400 ( sunxi_sdhci_t * sdhci )

static

Switch the Sunxi SDHCI controller to High Speed 400 (HS400) mode.

This function switches the Secure Digital Host Controller Interface (SDHCI) in a Sunxi system-on-a-chip (SoC) environment to High Speed 400 (HS400) mode.

Parameters

sdhci A pointer to the Sunxi SDHCI controller structure.

Returns: Returns 0 on success, or a negative error code on failure.

◆ sunxi_mmc_mmc_switch_speed_mode()

static int sunxi_mmc_mmc_switch_speed_mode	(	sunxi_sdhci_t *	sdhci,
		uint32_t	spd_mode
	)

static

Switches the speed mode of the MMC controller.

This function switches the speed mode of the MMC controller based on the provided speed mode.

Parameters

sdhci	Pointer to the SD/MMC host controller structure.
spd_mode	Speed mode to be switched to.

Returns: Returns 0 upon success, -1 if an error occurs.

◆ sunxi_mmc_probe()

static int sunxi_mmc_probe ( sunxi_sdhci_t * sdhci )

static

Probes the SD/MMC card attached to the given host controller.

This function probes the SD/MMC card attached to the specified host controller, retrieves various card-specific data such as CID and CSD, and sets the card to the appropriate mode. It also handles sending commands and checking for errors.

Parameters

sdhci Pointer to the SD/MMC host controller structure.

Returns: 0 on success, or an error code if an error occurred during probing.

◆ sunxi_mmc_read_blocks()

static uint32_t sunxi_mmc_read_blocks	(	sunxi_sdhci_t *	sdhci,
		void *	dst,
		uint32_t	start,
		uint32_t	blkcnt
	)

static

Reads blocks from the SD/MMC card.

This function reads blocks from the SD/MMC card starting from the specified block address. It supports reading multiple blocks and handles high capacity cards appropriately.

Parameters

sdhci	Pointer to the SDHCI controller structure.
dst	Pointer to the destination buffer where the data will be stored.
start	Start block address from where to read the data.
blkcnt	Number of blocks to read.

Returns: Number of blocks read on success, 0 otherwise.

◆ sunxi_mmc_sd_change_freq()

static int sunxi_mmc_sd_change_freq ( sunxi_sdhci_t * sdhci )

static

Change the frequency of the SD card.

This function changes the operating frequency of the SD card based on its capabilities. It reads the SCR (SD Configuration Register) to determine if the card supports higher speeds. If the card supports higher speeds, it adjusts the frequency accordingly.

Parameters

sdhci Pointer to the Sunxi SDHCI controller structure.

Returns

Returns 0 on success, indicating successful change of frequency, or an error code indicating failure. Possible error codes:

Negative value: indicates a communication error with the SD card.
Positive value: indicates an internal error within the function.

◆ sunxi_mmc_sd_send_if_cond()

static int sunxi_mmc_sd_send_if_cond ( sunxi_sdhci_t * sdhci )

static

Sends the SD CMD8 (SEND_IF_COND) command to the MMC controller.

This function sends the SD CMD8 command to the MMC controller to check if the card supports the given voltage range.

Parameters

sdhci Pointer to the SD/MMC host controller structure.

Returns: Returns 0 upon success, an error code if an error occurs.

◆ sunxi_mmc_sd_send_op_cond()

static int sunxi_mmc_sd_send_op_cond ( sunxi_sdhci_t * sdhci )

static

Sends SD card initialization sequence and waits for it to become ready.

This function sends the SD card initialization sequence, which includes sending application-specific commands and checking the card's response until it becomes ready. It also updates the MMC structure with relevant information such as the card version, OCR value, and high capacity flag.

Parameters

sdhci Pointer to the SDHCI controller structure.

Returns: 0 on success, error code otherwise.

◆ sunxi_mmc_sd_switch()

static int sunxi_mmc_sd_switch	(	sunxi_sdhci_t *	sdhci,
		int	mode,
		int	group,
		uint8_t	value,
		uint8_t *	resp
	)

static

Switch the functionality of the SD card.

This function switches the functionality of the SD card, such as changing the frequency or mode of operation. It sends a SWITCH_FUNC command to the SD card with the specified parameters to perform the desired switch.

Parameters

sdhci	Pointer to the Sunxi SDHCI controller structure.
mode	Switch mode indicating the type of switch operation to perform.
group	Switch group indicating the group of functions to switch.
value	Value indicating the specific function or setting to switch to within the specified group.
resp	Pointer to a buffer to store the response from the SD card.

Returns

Returns 0 on success, indicating successful completion of the switch operation, or an error code indicating failure. Possible error codes:

Negative value: indicates a communication error with the SD card.
Positive value: indicates an internal error within the function.

◆ sunxi_mmc_send_ext_csd()

static int sunxi_mmc_send_ext_csd	(	sunxi_sdhci_t *	sdhci,
		char *	ext_csd
	)

static

Send the SEND_EXT_CSD command to retrieve the Extended CSD from the MMC/SD card.

This function sends the SEND_EXT_CSD command to the MMC/SD card to retrieve its Extended CSD register, which contains various configuration parameters and settings. It stores the retrieved Extended CSD data in the provided buffer.

Parameters

sdhci	Pointer to the Sunxi SDHCI controller structure.
ext_csd	Pointer to the buffer where the Extended CSD data will be stored.

Returns

Returns 0 on success, indicating successful retrieval of the Extended CSD data, or an error code indicating failure. Possible error codes:

Negative value: indicates a communication error with the MMC/SD card.
Positive value: indicates an internal error within the function.

◆ sunxi_mmc_send_status()

static int sunxi_mmc_send_status	(	sunxi_sdhci_t *	sdhci,
		uint32_t	timeout
	)

static

Sends status command to the SD/MMC card and waits for the card to be ready.

This function sends the status command to the SD/MMC card and waits for the card to be ready for data transfer. It retries sending the command until the card is ready or until the timeout expires.

Parameters

sdhci	Pointer to the SDHCI controller structure.
timeout	Timeout value in milliseconds.

Returns: 0 on success, error code otherwise.

◆ sunxi_mmc_set_block_len()

static int sunxi_mmc_set_block_len	(	sunxi_sdhci_t *	sdhci,
		uint32_t	len
	)

static

Sets the block length for data transfer on the SD/MMC card.

This function sets the block length for data transfer on the SD/MMC card, except in DDR mode.

Parameters

sdhci	Pointer to the SDHCI controller structure.
len	Block length to be set.

Returns: 0 on success, error code otherwise.

◆ sunxi_mmc_set_bus_width()

static void sunxi_mmc_set_bus_width	(	sunxi_sdhci_t *	sdhci,
		uint32_t	width
	)

static

Set the bus width for the Sunxi SDHCI controller.

This function sets the bus width for the Secure Digital Host Controller Interface (SDHCI) in a Sunxi system-on-a-chip (SoC) environment.

Parameters

sdhci	A pointer to the Sunxi SDHCI controller structure.
width	The bus width to be set (in bits).

◆ sunxi_mmc_set_clock()

static void sunxi_mmc_set_clock	(	sunxi_sdhci_t *	sdhci,
		uint32_t	clock
	)

static

Set the clock frequency for the Sunxi SDHCI controller.

This function sets the clock frequency for the Secure Digital Host Controller Interface (SDHCI) in a Sunxi system-on-a-chip (SoC) environment.

Parameters

sdhci	A pointer to the Sunxi SDHCI controller structure.
clock	The desired clock frequency to be set.

◆ sunxi_mmc_show_card_info()

static void sunxi_mmc_show_card_info ( sunxi_sdhci_t * sdhci )

static

Displays information about the SD/MMC card attached to the given host controller.

This function prints various details about the SD/MMC card attached to the specified host controller, such as the card type, capacity, CID, CSD, maximum transfer speed, manufacturer ID, OEM/application ID, product name, product revision, serial number, and manufacturing date.

Parameters

sdhci Pointer to the SD/MMC host controller structure.

◆ sunxi_mmc_switch()

static int sunxi_mmc_switch	(	sunxi_sdhci_t *	sdhci,
		uint8_t	set,
		uint8_t	index,
		uint8_t	value
	)

static

Send the SWITCH command to the MMC/SD card to change a specified mode or setting.

This function sends the SWITCH command to the MMC/SD card to change a specified mode or setting. It is typically used to modify various parameters or configurations of the card.

Parameters

sdhci	Pointer to the Sunxi SDHCI controller structure.
set	Value indicating the type of setting to be changed.
index	Index of the setting within the specified set.
value	New value to set for the specified setting.

Returns

Returns 0 on success, indicating successful completion of the SWITCH command, or an error code indicating failure. Possible error codes:

Negative value: indicates a communication error with the MMC/SD card.
Positive value: indicates an internal error within the function.

◆ sunxi_mmc_write_blocks()

static uint32_t sunxi_mmc_write_blocks	(	sunxi_sdhci_t *	sdhci,
		void *	dst,
		uint32_t	start,
		uint32_t	blkcnt
	)

static

Writes blocks of data to the MMC device.

This function writes a specified number of blocks to the MMC (MultiMediaCard) device associated with the given SDHCI (SD Host Controller Interface) instance. It supports both single block and multiple block write operations, and handles sending the appropriate commands to the MMC device.

Parameters

[in]	sdhci	A pointer to the SDHCI instance.
[in]	dst	A pointer to the destination buffer from which data will be written to the MMC.
[in]	start	The starting block number where the data writing begins.
[in]	blkcnt	The number of blocks to write.

Returns: The number of blocks successfully written, or 0 if writing failed.

Variable Documentation

◆ tran_speed_time

const int tran_speed_time[]

static

Initial value:

◆ tran_speed_unit

const int tran_speed_unit[]

static

Initial value:

Macros

Functions

Variables

Macro Definition Documentation

◆ UNSTUFF_BITS

Function Documentation

◆ extract_mid()

◆ extract_month()

◆ extract_oid()

◆ extract_prv()

◆ extract_psn()

◆ extract_year()

◆ sunxi_mmc_blk_read()

◆ sunxi_mmc_blk_write()

◆ sunxi_mmc_check_bus_width()

◆ sunxi_mmc_device_is_sd()

◆ sunxi_mmc_go_idle()

◆ sunxi_mmc_host_is_spi()

◆ sunxi_mmc_init()

◆ sunxi_mmc_mmc_change_freq()

◆ sunxi_mmc_mmc_send_op_cond()

◆ sunxi_mmc_mmc_switch_bus_mode()

◆ sunxi_mmc_mmc_switch_bus_width()

◆ sunxi_mmc_mmc_switch_ds()

◆ sunxi_mmc_mmc_switch_hs()

◆ sunxi_mmc_mmc_switch_hs200()

◆ sunxi_mmc_mmc_switch_hs400()

◆ sunxi_mmc_mmc_switch_speed_mode()

◆ sunxi_mmc_probe()

◆ sunxi_mmc_read_blocks()

◆ sunxi_mmc_sd_change_freq()

◆ sunxi_mmc_sd_send_if_cond()

◆ sunxi_mmc_sd_send_op_cond()

◆ sunxi_mmc_sd_switch()

◆ sunxi_mmc_send_ext_csd()

◆ sunxi_mmc_send_status()

◆ sunxi_mmc_set_block_len()

◆ sunxi_mmc_set_bus_width()

◆ sunxi_mmc_set_clock()

◆ sunxi_mmc_show_card_info()

◆ sunxi_mmc_switch()

◆ sunxi_mmc_write_blocks()

Variable Documentation

◆ tran_speed_time

◆ tran_speed_unit